FOURTH FIVE-YEAR REVIEW REPORT FOR … five-year review report for lindsay manufacturing compan...

FOURTH FIVE-YEAR REVIEW REPORT FOR LINDSAY MANUFACTURING COMPANY SUPERFUND SITE

PLATTE COUNTY, NEBRASKA

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Prepared for

U.S. Environmental Protection Agency Region 7

Lenexa, Kansas

>uperfund Director Superfund Division

Date

30284910

Superfund

LINDSAY MANUFACTURING COMPANY

FOURTH FIVE-YEAR REVIEW REPORT

TABLE OF CONTENTS .

List of Abbreviations; Acronyms and Definitions ..................................................... ...iii 1.0 ·introduction ...................................................................................................................... 1

2.0· Site Chronology··················'···························································································· 2 3.0 Background ........................................................................................................................ 5

3.1 Site Location .......................................................................... , ......................................... 5 3.2 Physical Characteristics ............ : ............................................................... : ....................... 5

3.2.1 . Topography ........................................... : .......................... .-........................... , ............ 5 3.2.2 !Hydrology .. : ................ : .......................................................... , .................................. 5 3.2.3 Geology...................................................................................................................... 6 3.2.4 Hydrogeology .................. : ................................... : .................................. , ................. 7 3.2.5 Capture Zone Analysis ....................................,. ......................................................... 9 ·

3.3 Land and Resource Use .................................................................................................. 10 3.4' History of Contamination.... .' ................................. , ........................................... ,. ............ l!) 3.5 Initial Response .................................................. : ........................................................... 11 3.6 Basis for Taking Action .............................................. · ................................................... 11

4.0 Remedial Actions ........................................................................................................... 12 ~ 4.1 Remedy Selection ........................................................................................................... 12 4.2 Remedy Implementation ................................................................................................ 13 4.3 Groundwater Extraction System Operation/Operation and Maintenance ...................... 15

5.0 Progress Since Last Review···························'······························································· 19 6.0 Five-Year Review Process ............................................................................................. 23

6.1 Administrative Components .......................... , ................................................................ 23 6.2 Community Involvement. ............................................................................................... 23 6.3 Document Review ........................................................... : ............... : .............................. 23

6.4 · Data Review····················································································'······························ ) 23 6.4.1 Groundwater ..................................... · .................. ,, .................................................. 24· 6.4.2 Discharges to Surface Water. ....... , ........................................................................... 25 6.4.3 Groundwater Use Review .......................................................................... .,............ 25

6.5 Site Inspection ................................................................................................................ 26 6.6 Interviews ........................................................................................................................ 27

7.0 Technical Assessment .................................................................................................... 29 7.1 Question A: Is the remedy functioning as intended by the decision documents? ......... 29

7.1.1 Remedial Action Performance ................................................................................ 29 7.1.2, System Operations/O&M ........................................................................................ 29 7.1.3 Opportunities for Optimization ............................................................................... 30 7.1.4 Early Indicators of Potential Issues ..................................................... : ................... 31 7.1.5 Implementation oflnstitutional Controls and Other Measures .............'. ................. 32

7.2 Question B: Are the exposure assumptions, toxicity data, cleanup levels and remedial action objectives (RAOs) used at the time of the remedy selection still valid? ............ 32

7.2.1 Changes in Standards and To-Be-Considered Criteria ........................................... 32 7.2.2 Changes in Exposure Pathways .............................................................................. 33 7.2.3 Changes in Toxicity and Other Contaminant Characteristics ........................ , ........ 33 7.2.4 Changes in Risk Assessment Methods ........................................................... : ....... 34



7.3 Question C: Has any other information come to light that could call into question the protectiveness of the remedy? 34

7.3.2 Natural Disaster Impacts 34 7.3.3 Any Other Information That Could Call Into Question the Protectiveness of the Remedy 35

7.4 Technical Assessment Summary 35 8.0 Issues 36 9.0 Recommendations and Follow-up Actions....' 38 10.0 Protectiveness Statement 35 11.0 Next Review : .36 12.0 References 37

Tables

Table 2-1 Table 4-1 Table 4-2 Table 4-3

Chronology of Site Events Groundwater Clean-up Levels Summary of Pumping Volumes During Review Period (gallons) Contaminant Mass Removed by Interceptor Wells

Figures

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12

Vicinity Map Historical Facility Layout-1982 Site Monitoring/Interceptor Well and Hydropunch Locations Downgradient Site Monitoring/Interceptor Wells and Hydropunch Locations Cross Section A - A ' Cross Section B-B' Cross Section C - C Source Areas and Sand Channel Location Concentration vs. Time Graph for MW06-11 Concentration vs. Time Graph for MW89-12 Concentration vs. Time Graph for MW06-08 Concentration vs. Time Graph for MW06-02A

Attachments

Attachment 1 Attachment 2 Attachment 3 Attachment 4

Site Inspection Checklist Photographs Documenting Site Conditions List of Documents Reviewed Historical Data

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LINDSAY MANUFACTURING COMPANY FOURTH F I V E - Y E A R REVIEW REPORT

LIST OF ABBREVIATIONS

§ section 1,1,1-TCA 1,1,1 -trichloroethane AOIW Add-on Interceptor Well ARAR Applicable or Relevant and Appropriate Requirement CD Consent Decree CENWK U.S. Army Corps of Engineers, Kansas City District CERCLA Comprehensive Environmental Response, Compensation and Liability Act CFR Code of Federal Regulation Cr6 hexavalent chromium 1,1-DC A 1,1-dichloroethane 1,2-DCA 1,2-dichloroethane 1,1-DCE 1,1-dichloroethene EC electrical conductivity EPA Environmental Protection Agency FS Feasibility Study FYR Five-year review gpm gallons per minute HRC Hydrogen Release Compound HSU hydrostratigraphic units IW interceptor well LMC Lindsay Manufacturing Company MCL Maximum Contaminant Level MW monitoring well NA not applicable NCP National Contingency Plan NDEQ Nebraska Department of Environmental Quality NPL National Priorities List OIW Original Interceptor Well O&M operation and maintenance PCE tetrachloroethene

QA quality assurance QAPP Quality Assurance Project Plan QC quality control RAGS Risk Assessment Guidance for Superfund RA Remedial Action RAO remedial action objective RD Remedial Design RI Remedial Investigation ROD Record of Decision

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LINDSAY MANUFACTURING COMPANY FOURTH FIVE-YEAR REVIEW REPORT

RSL Regional Screening Level SMCL secondary maximum contaminant level SVE soil vapor extraction TCE trichloroethene TIW Third Interceptor Well ug/L micrograms per liter VOC volatile organic compound

IV



EXECUTIVE SUMMARY

This is the fourth five-year review for the Lindsay Manufacturing Co. Site. The Lindsay Manufacturing Co. (LMC) Site is a 42-acre active manufacturing facility located on the northeast side of the Village of Lindsay, Nebraska. The facility is bounded by farmland to the north and east, East 2 n d Street and the Village of Lindsay to the south, and a tributary (Dry Creek) to Shell Creek and the Village of Lindsay to the West.

The Site was originally a gasoline station until the late 1950s. In 1961, a manufacturing plant was constructed on-Site, and in 1965, LMC was formed to manufacture agricultural irrigation systems. Disposal of material from plant operations historically included discharge of spent acid from the galvanizing process. Slugs of spent acid were piped to an earthen disposal pit located north of the galvanizing building. A small burn area located adjacent to the disposal pit was used to burn paper products and potentially small quantities of solvents and degreasers. The disposal pit was replaced with a wastewater treatment facility that was located in the current Cell Area and designed to neutralize the spent acid. Test holes advanced during the construction of the wastewater treatment plant indicated that groundwater beneath the disposal pit had abnormal acidity and temperatures.

There are approximately 260 people living within a one-mile radius of the facility. The water supply well for the Village of Lindsay is located hydraulically upgradient of the facility and is not considered impacted by the Site. The nearest residence with a private well located within the contaminant plume is located about 2,300 feet southeast of the facility.

An on-facility groundwater extraction well was installed in March 1983 to intercept and recover impacted groundwater beneath the Site. A groundwater extraction and treatment system began operation a year later to neutralize and remove contaminants from extracted groundwater. An additional extraction well was installed in the southeast corner of the LMC property in 1989 to control off-facility migration of contaminants and increase the radius of influence.

In 1983, LMC began an investigation of the nature and extent of contamination at the LMC Site. The LMC Site was proposed for the National Priorities List (NPL) in October, 1984. The Site was placed on the NPL on October 4, 1989 following a reproposal by the Nebraska Department of Environmental Quality (NDEQ). The Site was included on the NPL because of the threat to public health associated with release of contaminants that included sulfate, zinc, iron, cadmium, chromium, lead, and volatile organic compounds (VOCs) from former process waste.

A Remedial Investigation (RI)/Feasibility Study (FS) was initiated in January, 1988, with the Proposed Plan completed in August, 1990 and the ROD was signed in September, 1990. The final remedy for the Site was selected by the EPA and consisted of the following:

• installation of a pilot soil vapor extraction (SVE) system • enhancement and utilization of the existing groundwater extraction and treatment systems • installation of additional groundwater monitoring .wells (MWs) • installation of an additional extraction well

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• continued monitoring of the groundwater collection/treatment system during cleanup activities

In a Consent Decree (CD) signed with EPA in April 1992, the responsible party agreed to perform the remedial design/remedial action (RD/RA) and pay past costs for cleaning up the Site. A third extraction well was installed in 1993 to increase the amount of groundwater extracted and treated. The SVE pilot study was concluded in 1993 and a full-scale SVE system began operation in 1995. By 1998, the EPA determined that the SVE system had achieved the Site-specific remediation levels and authorized decommissioning of the system. The use of irrigation as a means for disposal for extracted groundwater was also approved by the EPA.

In 2004, an off-facility interceptor well (G127000) was installed to address VOC contamination that had been detected in off-facility domestic water supply wells. Whole-house treatment systems were also installed at two private residences located hydraulically downgradient of the Site. In 2006, NDEQ provided authorization for G127000 to periodically discharge extracted untreated groundwater to Shell Creek. A second interceptor well (EXT07-02) was installed in the southern terminus of the plume in 2007. In 2008, NDEQ gave approval for periodic discharges to Shell Creek for groundwater extracted from EXT07-02. Later in 2008, NDEQ allowed higher flow rates to be discharged to Shell Creek, allowing continual operation of the two off-facility interceptor wells throughout the year. A third off-facility interceptor well (EXT 11-01) was installed in October 2011 to address VOC contamination detected downgradient of interceptor well EXT07-02.

Under the CD, LMC is responsible for groundwater monitoring and maintenance and inspection of the groundwater extraction and discharge system.

Investigations conducted since the last FYR to determine the potential presence of other onfacility source areas indicate that an additional source area may exist that has not been fully defined. An area located on the north side of Building 1 was reportedly used for the historical disposal of solvents. Elevated concentrations of 1,1-DCE, TCE, and PCE were detected in groundwater samples collected from boring HP09-10. The lateral extent of this contamination to the north and west of Building 1 has not been fully defined.

The lateral extent of VOC and metals contamination associated with the Cell Area is not fully known. There is a lack of suitable monitoring wells to the west of the Cell Area, specifically the northwest outdoor Warehouse Area and west and northwest of Building 2. In addition, the collection of further geologic and hydrogeologic data from this area would be beneficial in the refinement of the Site hydrogeologic model.

Groundwater flow within the silt and silty-clays and the sand channel deposits, and hydraulic communication between these units and the lower sand and gravel unit is poorly understood. This data gap is due to both a lack of information regarding the areal extent of the sand channel deposits and the number of monitoring wells installed within the silts to silty-clays and sand channel deposits on Site.

Contamination in the upper hydrostratigraphic unit has not been fully characterized or defined. Very little historical data has been collected from this unit. A robust capture zone analysis, including both horizontal and vertical assessment, has not been completed.

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The remedy at the Lindsay Manufacturing Co. Site currently protects human health and the environment because the off-facility plume is hydraulically controlled. However, in order for the remedy to be protective in the long-term, the following actions need to be taken to ensure protectiveness. These actions include reassessment of the current geologic Site conceptual model, defining and remediating source areas, and evaluation of the upper hydrostratigraphic unit.

It should be noted that LMC has agreed to pursue further source area delineation in 2013 and plans to perform targeted source area removal via ex-situ and/or in-situ methods in 2014. However, both of these items will be retained as issues in this FYR since the work has not been completed.

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LINDSAY MANUFACTURING COMPANY FOURTH FlVE-YEAR REVIEW REPORT

Five-Year Review Summary Form

SITE IDENTIFICATION

Site Name: Lindsay Manufacturing Company

EPA ID: NED068645696

Region: 7 State: NE City/County: Lindsay/Platte

NPL Status: Final

Multiple OUs?

No Has the Site achieved construction completion? Yes

Lead agency: EPA

Author name (Federal or State Project Manager): Bradley Vann with support from the U.S. Army Corps of Engineers, Kansas City District

Author affiliation: U.S. EPA Region 7

Review period: 7/3/2008 2/2013

Date of Site inspection: 11/8/2012

Type of review: Statutory

Review number: 4

Triggering action date: 9/16/2008

Due date (five years after triggering action date): 9/16/2013

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Five-Year Review Summary Form (continued)

Issues and Recommendations Identified in the Five-Year Review: Issue #1

OU(s): NA Issue Category: Monitoring

Issue: Evaluation of the data quality criteria for the analytical samples collected over the past five years indicate that errors continue to be made in sample handling and consistency. Continued errors in the handling and analysis of analytical samples could impact the validity of the long-term monitoring data. This is a carryover issue from the previous Five-year review and has not been sufficiently addressed during this review period.

»

Recommendation: Review the current Quality Assurance Project Plant (QAPP) and Operations and Maintenance (O&M) Plan and revise the documents as needed. Conduct frequent audits of sampling activities to ensure sample collection and handling procedures are in accordance with the QAPP and the O&M Plan and take corrective actions as needed. Audit the analytical laboratory to assure compliance with applicable project procedures and industry practices.

Affect Current Protectiveness

Affect Future Protectiveness

Implementing Party

Oversight Party

Milestone Date

No Yes PRP EPA September 2014


OU(s): NA Issue Category: Remedy Performance OU(s): NA

Issue: Groundwater flow within two of the three identified geologic units beneath LMC, and hydraulic communication between all three units are poorly understood. This is due to geologic uncertainty regarding the areal extent of the sand channel deposits, i.e. west to east, and a lack of monitoring wells installed within the upper silts and silty-clays, and sand channel deposits.

OU(s): NA

Recommendation: Hydraulic testing (i.e. pump testing) and consistent water level monitoring of wells installed within the three units on Site during pumping and non-pumping events would be beneficial in determining the hydraulic interconnection of the three units, potential differences in the direction of groundwater flow, and

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effects on contaminant transport. The lateral extent of the sand channel deposits should be delineated. The hydraulic interconnection between the upper silt to silty-clays and sand channel deposits should be characterized. The hydrologic connection of these units to the lower sand and gravels should be established in order to assist in the evaluation of the effectiveness of the on-facility portion of the remedy. This data can be used for remedy optimization and future adjustments of the on-facility extraction well system.



implementing Party

Oversight Party

Milestone Date




Issue: Source areas have not been effectively addressed and mass flux from these source areas continues to impact groundwater. Until these source areas are effectively reduced or eliminated, aquifer cleanup goals are unlikely to be obtained within a 30 year period from remedy implementation.

OU(s): NA

Recommendation: Evaluate remedial alternatives to remediate insitu or remove impacted source media. It should be noted that LMC has agreed to conduct targeted source area removal via ex-situ and/or in-situ methods in 2014.



Implementing Party

Oversight Party

Milestone Date




Issue: Results from a recent investigation indicate that the source area north of Building 1 has not been fully delineated. In addition, the Cell Area source(s) has not been fully characterized.

OU(s): NA

Recommendation: Perform additional characterization to delineate the vertical and horizontal extent of contamination. In addition, the characterization should include the collection of sufficient geologic and hydrogeologic data so that the hydraulic

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communication between the different geologic units is understood. LMC has agreed to conduct further source area delineation in 2013; however, the specific areas targeted for investigation are not yet known.



Implementing Party

Oversight Party

Milestone Date




Issue: The full nature and extent of VOCs in the upper hydrostratigraphic unit (silts, silty-clays and sandy silt deposits) has not been fully delineated. Although the full nature and extent of contamination is not defined, no public water supplies are installed in this hydrostratigraphic unit and vapor intrusion studies, conducted on facility and off facility, have indicated no risks through that pathway. Three new monitoring wells were installed during the winter of 2013, and are located just south of the facility, sampling results were not available for review for inclusion in this report. VOCs were detected just below the contact of the upper hydrostratigraphic unit and the sand and gravel aquifer more than two miles south of the facility.

OU(s): NA

Recommendation: The results of the newly installed monitoring wells should be evaluated to define the full extent of VOCs in the upper hydrostratigraphic unit. Should VOCs be detected it is recommended that hydropunch sampling of this unit be performed downgradient of LMC.



Implementing Party

Oversight Party

Milestone Date




Issue: The previous Five-year Review recommended the collection of surface water samples from Shell Creek to obtain metals and hardness data. Collection of this data was to provide a

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FOURTH FryE-YEAR REVIEW REPORT

greater confidence interval for chronic surface water ecological criteria.

.Recommendation: The additional metals and hardness data from the surface water in Shell Creek has been collected. This data should be utilized to prepare an ecological risk assessment for Shell Creek.



Implementing Party

Oversight Party

Milestone Date


Protectiveness Statement(s)

Include each individual Oil protectiveness determination and statement. If you need to add more protectiveness determinations and statements for additional OUs, copy and paste the table below as many times as necessary to complete for each OU evaluated in the FYR report.

Operable Unit: Protectiveness Determination: Addendum Due Date NA Short-term Protective (if applicable):

NA

Protectiveness Statement: The remedy at the Lindsay Manufacturing Co. Site currently protects human health and the environment because the off-facility plume is hydraulically. controlled, vapor intrusion sampling showed no unacceptable risk, and no public supply wells within the footprint of the plume are being used for drinking water. However, in order for the remedy to be protective in the long-term, the following actions need to be taken to ensure protectiveness. These actions include reassessment of the current geologic Site conceptual model, defining and remediating source areas, evaluation of the nature and extent of VOC contamination upper hydrostratigraphic unit, and conducting a robust horizontal and vertical capture zone analysis.

Sitewide Protectiveness Statement

Protectiveness Determination: Addendum Due Date: Short-term Protective NA

Protectiveness Statement: The remedy at the Lindsay Manufacturing Co. Site currently protects human health and the environment because the off-facility plume is hydraulically controlled, vapor intrusion sampling showed no unacceptable risk, and no public supply wells within the footprint of the plume are being used for drinking water. However, in order for the remedy to be protective in the long-term, the following actions need to be taken to ensure protectiveness. These actions include reassessment of the current geologic Site conceptual model, defining and remediating source areas, evaluation of the nature and extent of VOC contamination upper hydrostratigraphic unit, and conducting a robust horizontal and vertical capture zone analysis.

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1.0 Introduction

The purpose of the five-year review (FYR) is to evaluate the performance of the remedy and determine whether the remedy remains protective of human health and the environment and functions as intended based on the decision documents. Furthermore, the five-year review assesses whether the remedy will continue to be protective in the future. It determines whether the exposure assumptions, toxicity data, cleanup levels and remedial action objectives (RAOs), used at the time of the remedy selection are still valid and whether any other information come to light that could call into question the protectiveness of the remedy.

The United States Environmental Protection Agency (EPA) is preparing this FYR pursuant to the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) Section 121(c) and the National Contingency Plan (NCP). CERCLA § 121(c), as amended, states:

If the President selects a remedial action that results in any hazardous substances, pollutants, or contaminants remaining at the Site, the President shall review such remedial action no less often than each five years after the initiation of such remedial action to assure that human health and the environment are being protected by the remedial action being implemented. In addition, if upon such review it is the judgment of the President that action is appropriate at such Site in accordance with section [104] or [106], the President shall take or require such action. The President shall report to the Congress a list of facilities for which such review is required, the results of all such reviews, and any actions taken as a result of such reviews.

In the NCP implementing regulations, 40 CFR § 300.430(f)(4)(h), EPA provided the following interpretation:

If a remedial action is selected that results in hazardous substances, pollutants, or contaminants remaining at the Site above levels that allow for unlimited use and unrestricted exposure, the lead agency shall review such action no less often than every five years after the initiation.of the selected remedial action.

EPA Region 7 has conducted a FYR of the remedial actions implemented at the Lindsay Manufacturing Co. in Lindsay, Platte County, Nebraska. This review was conducted from August 2012 through February 2013. This report documents the results of that review.

This is the fourth FYR for the LMC Site. The triggering action for this statutory review is the signature date of the previous FYR Report, which was signed on September 16, 2008. The FYR is required because hazardous substances, pollutants or contaminants remain at the Site above levels that allow for unlimited use and unrestricted exposure.

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2.0 Site Chronology

Significant Site events or milestones are presented in Table 2-1.

Table 2-1: Chronology of Site Events Event Date

Paul Zimmer starts a sprinkler irrigation business that would later become LMC. 1958 Plant constructed and L M C begins production. 1961 1969 L M C incorporated and expanded. 1971 1972 Dekalb Agrasearch Inc., Acquires LMC. 1974 L M C drills 4 test holes and a deep test hole. Proposed water treatment facility, acidic groundwater and elevated temperatures. New public water supply installed.

1983

Original Interceptor Well (OIW) installed. L M C proposed for National Priorities List (NPL).

1984

Add-on Inspector Well (AOIW) installed. 1988 L M C begins Remedial Investigation/Feasibility Study (RI/FS). 1988 NPL Final. 1989 Proposed Plan provided to the Public. 1990 Record of Decision (ROD). 1990 Consent Decree Signed, Remedial Design approved for Third Interceptor Well (TIW).

1992

TIW installed, resulted in date that triggered the first Five-year Review. 1992 Design for soil vapor extraction (SVE) system approved. Remedial Action (RA) Work Plan approved.

1994

Inspection of SVE System. 1995 Established SVE clean up criteria. Incorporated irrigation as part of the groundwater treatment system. New risk assessment by state.

1996

Determined that both Area 1 and Area 2 for SVE were approaching cleanup. 1997 Decommissioned SVE in Area 2. Abandoned select groundwater monitoring wells 1998 (MWs). Changed groundwater pumping schedule. Completed first Five-year Review. 1998 Turned over TIW to landowner. Investigated additional areas where plume could 1999 migrate. Identified additional domestic water supply wells where plume migrated. Hydrogen Release Compound (HRC) study approved and conducted on plant Site near treatment lagoon.

2001

Extraction system hit by ice storm. L M C requested that EPA and the NDEQ consider 2003 using water for crop irrigation. Approval was given. Initiated second Five-year Review process. 2003 Conducted Five-year Review Inspection. Held public availability session. 2003 Sampled 3 domestic water supply wells. Provided results to owners. 2003 Quarterly groundwater sampling initiated. Samples collected during February, May, August, and November of each year.

2003

Subsurface Investigation and Groundwater Monitoring Report prepared. 2003 Whole-house treatment systems installed at two private residences and a new domestic well also installed.

2004

Installation of one irrigation well (G127000) between two residences to remove volatile organic compounds (VOCs) in this portion of the lower sand and gravel

2004

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LINDSAY MANUFACTURING COMPANY FOURTH F I V E - Y E A R R E V I E W REPORT

Event Date

aquifer. Pumping initiated in May 2004. Additional 9 MWs installed to delineate southern extent of plume. 2006 L M C received discharge authorization from NDEQ for Extraction well G127000. 2006 L M C begin periodic discharging of water to Shell Creek. 2007 The 75th quarterly groundwater sampling event occurred in August. 2007 Initiated third Five-year Review process. 2007 A second extraction well EXT07-02 installed in the south terminus of the plume along with two MWs.

2007

L M C conducted sampling in support of an area of reuse on the facility property and presented plans for the intended reuse activity.

2007

L M C provided a voluntary evaluation of potential supplemental remedial alternatives for enhanced groundwater remediation.

2007

L M C received approval from NDEQ for periodic surface water discharge to Shell Creek from EXT07-02.

2008

L M C conducted additional sampling in support of reuse on the facility property. 2008 EPA Certification of Completion of the Remedy. Not Yet Certified Completion of the Third FYR Report. 2008 L M C receives approval allowing discharge of higher flow rates from G127000 to Shell Creek and discharge from EXT07-02 to Shell Creek, allowing continual operation of the wells throughout the year

2008

L M C submits Work Plan outlining response actions to address issues identified in the Third FYR.

2009

Subslab and vertical profile soil gas samples were collected to assess vapor intrusion risk for on and off-facility receptors.

2009

L M C conducted direct push sampling to assess if additional on-facility source areas exist and to assess if the Cell Area is a source of chlorinated VOCs.

2009

Chlorinated VOC plume with concentrations greater than the M C L is discovered downgradient of interceptor well EXT07-02.

2009

Six MWs were installed to assess hydrogeologic and hydrostratigraphic conditions and to further delineate the downgradient limit of the VOC plume.

2009

L M C conducts direct push field investigation and installs six MWs to further delineate the off-facility extent of chlorinated VOC plume and to assess capture zones associated with interceptor wells (IW) G127000 and EXT07-02.

2010

Direct push drilling technology was utilized during multiple field events to determine the southeastern extent of the VOC M C L groundwater plume.

2010

L M C installed interceptor well EXT11-01 to provide hydraulic containment, maintain VOC plume capture, and prevent further downgradient plume migration at the southern terminus of the VOC plume.

2011

L M C collected vapor intrusion data immediately south of the facility to support a supplemental risk assessment for off-facility receptors. As part of this investigation, three monitoring wells were installed in the upper portion of the aquifer immediately downgradient of the facility to assess hydraulic conditions and the potential for contaminants in the upper silt and silty clay unit.

2013

L M C installed interceptor well EXT 13-01 approximately 800 feet southwest of the facility property line. Pending National Pollutant Discharge Elimination System discharge approval; discharge from EXT13-01 will be used for seasonal irrigation or discharged to Shell Creek during non-irrigation periods. The new interceptor well will operate continuously as a point of hydrologic control and prevent further

2013

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Event Date

downgradient plume migration until source area concentrations reduce sufficiently to allow for continuous operation of the on-facility interceptor wells.


3.0 Background

3.1 Site Location

The LMC Site is located on the northeast side of the Village of Lindsay in Platte County, Nebraska. The facility occupies a parcel of land approximately 42 acres in size and is located in the southeast quarter of the southwest quarter of Section 17, Township 20 North, Range 3 West. The facility is bounded by farmland to the north and east, East 2nd Street and the Village of Lindsay on the south, and a tributary to Shell Creek and the Village of Lindsay to the west (Figure 1).

3.2 Physical Characteristics

3.2.1 Topography

LMC is located along the southwestern flank of a relatively steep hill slope. This hill slopes to the west and southwest towards the town of Lindsay which is located along the western edge of the facility. Several small intermittent drainage channels have formed along the western flank of the hill slope and are tributaries of Shell Creek. The town of Lindsay occupies a portion of a relatively flat valley that trends to the south-southeast. South of Highway 91 the land gently slopes to the south-southeast, with hills located to the east and west of the valley.

LMC occupies approximately 42 acres which have been selectively leveled and stabilized. Drainage swales have been filled and some surfaces paved for transportation and equipment storage. The east half of the facility has been locally incised into the hillside for construction of the maintenance and final production buildings.

The facility is approximately 1,300 feet long (north to south) and the width ranges from approximately 1,570 feet at the north end of the property to 1,100 feet at the south end. The surface gradient across the property ranges from approximately 0.23 ft/ft in the central drainage channel to 0.53 ft/ft across the south property boundary. The average elevation of the facility is approximately 1,670 feet above mean sea level, and local relief ranges from 1,650 to 1,800 feet above mean sea level.

3.2.2 Hydrology

LMC is located within the Shell Creek drainage basin. Shell Creek receives runoff from the surrounding area during heavy rainfall events or melting snow via several intermittent streams and manmade ditches that are tributary to the creek. Shell Creek flows to the south-southeast across the valley where it eventually discharges to the South Platte River just east of Schuyler, Nebraska.

A drainage ditch traverses the central portion of the property and slopes'east to west (Figure 2). The ditch receives process water from plant operations, and discharges to a tributary (Dry Creek) of Shell Creek along the western edge of the facility. The construction and current condition of the central ditch is unknown and may facilitate infiltration of water to the underlying aquifer.

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Flow within Dry Creek is not well understood, although there may be some base flow provided by shallow groundwater in the immediate vicinity of the creek.

Groundwater beneath the LMC facility is currently pumped intermittently from two wells located on the property and is used for irrigation of crops north and south of the facility during the growing season. This water is not discharged to Dry Creek due to NPDES requirements. It is not known how much of this water is returned to the underlying aquifer, nor how much is run-off that enters the ditches or tributaries to Shell Creek. During the non-growing season no water is pumped.

Base flow within Shell Creek is supplied from shallow groundwater where the streambed intersects the water table. Gaining and losing reaches of Shell creek have not been identified. Annual climatic conditions and water withdrawals from the principal aquifer for irrigation can impact the water levels within the creek. The depth to the creek bed is estimated to be approximately 20 feet below the land surface in the vicinity of extraction wells EX07-02 and G127000 (Figure 3). During the Site tour in November 2012, an employee from Lindsay indicated that Shell Creek has periodically overtopped its banks and flooded the surrounding farm fields during high rainfall events.

Groundwater extracted from the off-facility groundwater remediation system wells G127000, EXT07-02, and EXT11-01, during the non-irrigation season, or if not needed for irrigation during the growing season, is discharged to Shell Creek. It is possible that this water may recharge the shallow groundwater along the losing reach of Shell Creek, although as previously indicated, gaining and losing reaches have not been mapped.

Although not considered to be a permanent body of water, groundwater extracted from G127000 is discharged to a lined off-gassing flow-through pond. During the Site visit in November 2012, the lining of the pond along the northern end was observed to not totally cover the pond area which may allow for water spillage and infiltration in the surrounding field. The water from this pond is gravity drained via a pipe to Shell Creek.

3.2.3 Geology

Regionally, the area is located near the eastern edge of the Sandhills of Nebraska. The landscape of this area was formed during the Pleistocene Epoch when glaciers advanced and retreated in this area of North America resulting in the deposition of glacially derived materials on top of the underlying bedrock. Windblown material, known as loess, was often deposited on top of glacial till and outwash deposits. Erosion and the dissection of these deposits by streams have formed the hills and valleys in the area surrounding the Site. Soils formed from the glacial material consist of loam to sandy-clay loam.

Locally, unconsolidated materials consist of silts and silty-clays interbedded with lenses of sand, and sands and gravels. Generally, finer grained material is present in the upper portion of the stratigraphic section while sands and gravels predominate in the lower section. During the RI and subsequent geologic investigations buried stream channel deposits were encountered beneath the old production water treatment cells and the eastern side of Building 2. The stream channel

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materials consist of fine to coarse grained sands and gravels, and are typically underlain by silts to silty-clays and fine sandy-clay material. These deposits are located beneath suspected source areas.

The silt to silty-clays, and fine sandy-clay material in the upper stratigraphic section are suggestive of lacustrine and/or loess deposits, while the interbedded stream channel deposits suggest a braided or meandering stream environment. While braided stream deposits are commonly associated with glacial outwash, depending on the distance from the receding ice it is common for these braided streams to transition to a meandering stream environment with overbank deposits and a developed floodplain.

The channel sands do not appear to be laterally contiguous (northwest to southeast) through the mapped area and are sometimes separated by deposits of silts and silty-clays. Although the channel deposits are thought to extend from the north-northwest near MW88-15 to the southsoutheast near MW88-12, the areal extent (east to west) of these channel deposits is unknown. Channel sands typically are continuous in the direction of stream flow and will laterally pinch out perpendicular to the channel. Very little drilling and borehole logging has been performed to the east and west of the identified sand channel deposits to verify their lateral extent. Silts to silty-clay material underlies the sand channel deposits with variable thickness. Due to the topography across the entire facility the thickness of the upper stratigraphic section material ranges from approximately 40 to 100 feet thick. Beneath this material lies the coarse sands and gravel deposits.

Given the geologic history of this area the coarse sands and gravels which comprise the lower stratigraphic section are indicative of outwash deposits. There are localized seams or lenses of silt to silty-clay material within these deposits that were identified during the hydropunch work performed in 2009 (Figures 4). These seams and lenses are located downgradient of the facility and in the vicinity of the three off-facility groundwater extraction wells as shown on cross sections on Figures 5 to 7. The thickness of the sands and gravels ranges from approximately 40 feet on facility to 100 feet off facility near the southern boundary of the plume. Beneath these deposits, weathered bedrock materials consisting of silty-clays to very fine sands and silts has been encountered. This material is thought to be from the underlying Cretaceous age Niobrara Formation.

3.2.4 Hydrogeology

The Site has been divided into hydrostratigraphic units in which each unit is supported by a common geologic morphology (i.e. similar lithology) and hydrologic characteristics (porosity and permeability). The identified units include the lower sands and gravels, the upper silts and silty-clays with lenses of sand, and the upper sand channel deposits.

The lower sand and gravel deposits are the principal water bearing unit in the Lindsay area due to the high transmissivity. Groundwater flow is towards the south-southeast and most likely follows the length of the valley and the course of Shell Creek. Almost all monitoring wells across the facility and downgradient of LMC have been installed in the lower sands and gravels, and all extraction wells have been installed in this unit. Groundwater flow and capture near the'

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downgradient extraction wells had been previously estimated in 2008 via a capture zone analysis, although verification was not complete since there was a lack of monitoring wells to verify the calculated water levels. An updated capture zone analysis has been completed as of this FYR for all off-facility extraction wells, except EXT 13-01 (newly installed but analysis is pending in 2013); however, additional capture analysis is warranted for on-facility extraction wells (see Section 3.2.5).

Locally, groundwater flow is complex due to the stratigraphy beneath the facility and operation of the two intermittent extraction wells on the facility. Groundwater has been encountered during borehole drilling in the silts and silty-clays, and the buried stream channel deposits. The silt to silty-clay material with lenses of sand has been referred to as an aquitard and/or confining unit in previous reports. An aquitard is a saturated geologic unit that can store and transmit water, but typically not in sufficient quantities to supply a production well. The horizontal component of flow is typically lower than the vertical component of flow, and as such aquitards are not a barrier to the vertical migration of water and contaminants (Cherry and Parker, 2004). This appears to be supported by the presence of contaminants in the lower sands and gravels beneath LMC. Contaminants were also detected in this unit prior to pumping from extraction wells located on the LMC property. The downward migration of the contaminants most likely intensifies during the periodic pumping of the extraction wells on the facility due to both hydraulic and contaminant concentration gradients that develop during pumping.

The sand channel deposits on the facility have been referred to as perched lenses of water, . although this has not been confirmed via the use of nested wells and hydraulic testing. Groundwater is present in the surrounding/underlying silts and silty-clay materials, as well as the underlying sands and gravels, and the degree of isolation or hydraulic connection with these units is not known. The direction of groundwater flow within a perched aquifer can at times differ than the direction of flow in an underlying aquifer; flow within the perched sediments will follow the path of least resistance which may be incongruent to that of the underlying aquifer. Currently, the direction of flow within the upper silts to silty-clays and sand channel deposits is unknown.

As previously indicated, hydraulic communication between the upper units and the lower sands and gravels is poorly understood. This uncertainty is due to a lack of information regarding the areal extent of the sand channel deposits, and number of monitoring wells installed within the silts to silty-clays and sand channel.deposits on Site. Currently, there are only two monitoring wells installed within the sand channel deposits that are monitored, MW06-11 located near the upgradient edge of the plume and MW89-13 located near the "toev of the sand channel deposits. No monitoring wells are currently installed in the silt to silty-clays, nor are there side gradient monitoring wells that are monitored on the facility.

Additional investigation of the upper hydrostratigraphic unit on the facility is recommended including the installation of monitoring wells within the silt to silty-clays and sand channel deposits. Monitoring well locations should include wells strategically placed within the plume, side gradient wells, and wells near the on-facility extraction wells. In addition, hydraulic testing and consistent water level measurement data collection during pumping and non-pumping regimes is recommended. This information will be beneficial in verifying the direction of

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groundwater flow within the upper units and the hydraulic interconnection of all three units, and thus contaminant transport. This data can be used for remedy optimization and future adjustments of the on-facility extraction well system. Off-facility, reported water levels for nested wells near the off-facility extraction wells suggest that there may be both upward and downward gradients within some of the sets of nested wells.

Three monitoring wells were recently installed in the upper silts to silty-clays, and sandy-silt deposits just to the south of LMC. However, this data was not available for this report so of the full nature and extent of VOC contamination is not determined. In addition, no groundwater sampling of the upper hydrostratigraphic unit was performed during the hydropunch sampling events between 2009 and 2011. This work was performed in the vicinity of G127000, EXT07-02 and EXT11 -01. Detections of VOCs above the MCLs were reported for hydropunch samples collected from HP 11-02 during Task 6 (Phase V) Field Activities in the fall of 2011 (Figure 7). The hydropunch samples were collected just below the upper hydrostratigraphic unit in the sand and gravel unit more than two miles south of LMC. The results indicated elevated VOC detections. Since there are no monitoring wells installed in the upper hydrostratigraphic units near the off-facility extraction wells, there is no information on contaminant levels nor hydraulic effects on this unit due to the high capacity pumping. It is recommended that additional investigation of the upper hydrostratigraphic unit beneath the facility be performed. If contamination is found in the upper hydrostratigraphic unit, the investigation should be expanded to include the off-facility area. This investigation would help to determine whether there is contamination within the upper silts to silty-clays and sand lense materials, and if so, whether the existing system is containing the migration of the VOCs in this unit. Although the full nature and extent of the VOC plume in the upper hydrostratigraphic unit will be more accurately defined after the three monitoring samples are collected and analyzed, the on and off-site vapor intrusion survey collected soil and groundwater samples in the unit and found on VOC contamination. In addition, no public supply wells are screened in this unit and during the vapor intrusion study no unacceptable risks were found.

3.2.5 Capture Zone Analysis

A capture zone analysis was reported in the December 2009 Interim Data Transmittal for the offfacility extraction well system to address concerns raised in the 2008 FYR. Analytical solution calculations were performed to estimate the maximum width and downgradient edge of groundwater capture. The results were initially reported in one of the 2008 Enhanced Groundwater Remediation Reports. It appears that values used in the calculations, including hydraulic conductivity, were estimates since LMC indicated that they would perform pump tests in 2010 at G127000 and EXT07-02. The results of the analysis indicated that the capture zone around G127000 was adequate; however, the plume near EXT07-02 was not being captured along the western and downgradient edges. Results of the direct push and hydropunch sampling effort conducted in 2009 indicated that the plume had migrated beyond EXT07-02. The depth of the aquifer near these wells was confirmed during direct push investigation and sampling activities performed in November and December 2009.

In response to the detection of VOCs downgradient of EXT07-02 and the identified need for hydraulic data to better evaluate the capture zones, additional field work was completed in April

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and May 2010. This field work included direct push investigation and hydropunch sampling activities, installation of two sets of nested monitoring wells, and pump tests performed on G127000 and EXT-07-02. The field work activities were conveyed in a letter report in July 2010, but an updated capture zone analysis was not provided.

Based on the April and May results additional direct push and hydropunch sampling, installation of nested monitoring wells, and the installation of a new extraction well, EXT 11-01, were completed in 2010 and early 2011.

In a Data Transmittal Letter from August 2012 LMC indicated that they performed a pump test and capture zone analysis for EXT 11-01. The results of the analysis indicated that the capture zone around EXT11-01 was adequate to hydraulically capture the lower portion of the plume in the sand and gravel channels.

Based on the uncertainty related to groundwater flow between the upper and lower units, it is recommended that the conceptual site model be updated to evaluate contaminant transport and the efficacy of the current system to adequately address all groundwater contamination.

3.3 Land and Resource Use

Land use in Platte County is predominantly agricultural, with manufacturing located within the village of Lindsay. Land use in the vicinity of the facility is a combination of agricultural and residential. A public recreational and utility area is located about 0.2 miles southwest of the Site. It is anticipated that land use in the surrounding area will remain similar to current uses.

The facility was originally a gasoline station until the late 1950s. The facility is currently fenced and is an active industrial facility. The majority of the facility is covered by impermeable surfaces, including paved roads and buildings. There are several small vegetative areas located throughout the Site. Dry Creek, a tributary of Shell Creek, is located along the western boundary of the facility.

Groundwater directly beneath the facility is not currently used as a drinking water source; however, there are 13 domestic supply wells downgradient of the facility. Two of the downgradient domestic supply wells are within the portion of the VOC plume that exceeds ^ MCLs. LMC has installed and maintains wellhead treatment systems at the Beller and Preister Domestic wells. There is also one stock supply well and several irrigation wells within the offfacility VOC plume.

3.4 History of Contamination

The facility was originally a gasoline station until the late 1950s. In 1958, Paul Zimmer began manufacturing irrigation systems. In 1961, a manufacturing plant was constructed on-facility and in 1965, LMC was formed. Disposal of materials from plant operations historically included discharge of spent acid from the galvanizing process. From the early 1970s to 1982, slugs of 10,000 to 15,000 gallons of spent acid were piped to an earthen disposal pit located north of LMC's galvanizing building. In 1982, LMC replaced the pit with a new wastewater treatment

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facility designed to neutralize the spent acid. During the installation of the wastewater treatment facility, four wells and a deep test hole were drilled and sampled in 1983. The samples revealed the groundwater had abnormally low pH and elevated temperatures. LMC reported these finding to NDEQ and began an investigation of the soils and groundwater..

Adjacent to the pit used to dispose of the spent acid was a burn area where cardboard boxes, pallets, and paper were burned. This burn area replaced a previously used burn area which was located north of the plant in the area of the drainage ditch. LMC personnel indicated that small quantities of solvents and degreasers may have been burned in both of the burn areas and then disposed of in the pit along with the spend acid. In addition, small quantities of solvents, degreasers, and aerosol cans of degreasing compounds may have been disposed of at the back door of the main plant.

3.5 Initial Response

Original Interceptor Well (OIW) was installed by LMC in March 1983 to intercept and recover impacted groundwater from the beneath the Site. In 1984, LMC began operating a groundwater extraction and treatment system, whereby the groundwater is treated by neutralizing and removing contaminants using the original interceptor well. A second extraction well (AOIW) was installed in the southeast corner of the LMC property in 1989 to control off-facility migration of contaminants and increase the radius of influence.

, In 1983, LMC began an investigation of the nature and extent of contamination at the Site and completed its study in 1990. The Site was proposed for the NPL on October 15, 1984. On October 4, 1989, the Site was placed on the final NPL listing following a reproposal by NDEQ. In response to a release or a substantial threat of a release of hazardous substances at or from the Site, LMC initiated an RI/FS on January 5, 1988. The RI report was completed on June 20, 1990, with the Proposed Plan identifying the preferred remedy completed on August 27, 1990. On July 10, 1990, the Proposed Plan identifying the preferred remedy was presented to the public for their review and comment along with the final RI and draft FS reports.

3.6 Basis for Taking Action

Hazardous substances that have been released at the Site include sulfate, zinc, iron, cadmium, chromium, lead, and volatile organics from former process waste. Off-facility groundwater contains heavy metals including cadmium, zinc, and VOCs including 1,1-dichloroethane (1,1DCA), l,2-dichloroethane(l,2-DCA), 1,1-dichloroethene (1,1-DCE), 1,2-dichloroethene (1,2DCE), tetrachloroethene (PCE), 1,1,1 -trichloroethane (1,1,1 -TCA), and trichloroethene (TCE). These VOCs have been identified in the perched sand channel in the northern half of the Site, in clay soils in the area around the northern quarter of the main plant, and between the main plant and the southern end of the galvanizing building. People could be exposed to contaminants by drinking water from contaminated domestic wells, by direct contact with contaminated water, by inhaling contaminants released during water use, or by eating food in which contaminants have bioaccumulated.

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FOURTH FrVE-YEAR REVIEW REPORT

4.0 Remedial Actions

4.1 Remedy Selection

The ROD for the Site was signed on September 28, 1990. The following RAOs were developed from data collected during the remedial investigation to aid in the development and screening of remedial alternatives to be considered for the ROD.

The purpose of the selected remedy in this ROD is to prevent current or future exposure to the contaminated groundwater, to determine the practicability of reducing contaminant migration from the soil into the groundwater, to implement soil vapor extraction if practicable, and to restore the groundwater aquifer to Maximum Contaminant Level (MCL) quality.

The major components of the selected remedy for the affected groundwater and soil include the following:

• A pilot study to evaluate the practicability of vacuum extraction of organic compounds from contaminated soil;

• If determined to be practicable by EPA and/or NDEQ, design and implementation of full scale soil vapor extraction system based on pilot study data;

• Enhancement of the existing groundwater extraction and treatment system by either increasing the volume of on-facility pumping from the existing extraction wells or by the installation of an additional interceptor (extraction) well;

• Utilization of the existing groundwater treatment facility to remove-contaminants from the collected groundwater;

• Installation of additional groundwater monitoring wells near irrigation well #54278 to further delineate the groundwater contaminant plume;

• The monitoring of the groundwater collection/treatment system and the groundwater contaminant plume during groundwater remediation activities; and

• In appropriate to protect human health, EPA and NDEQ will evaluate options, as part of implementation of the ROD, to ensure that drinking water wells are not installed in areas of the contaminant plume on and off-facility.

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Table 4-1 below provides the clean-up levels for groundwater specified in the ROD.

Table 4-1: Groundwater Clean-up Levels Compound/Parameter Clean-up Goal ,

1,1 -Dichloroethane NE 1,2-Dichloroethane 5 ug/L 1,1-Dichloroethene 7 ug/L . 1,2-Dichloroethene (Total) 70 pg/L Tetrachloroethene 5 ug/L 1,1,1-Trichloroethane 200 ug/L Zinc 5 mg/L Sulfate 250 mg/L Cadmium 0.005 mg/L Chromium 0.05 mg/L Lead 0.05 mg/L pH 6.5-8.5 Notes: NE Not established

4.2 Remedy Implementation

In a CD signed with EPA on April 9, 1992, the responsible party agreed to perform the RD/RA and pay past costs for cleaning up the Site. The RD was completed in conformance with the ROD. The RD was approved by EPA in 1992. In early 1993, a third extraction well became operational to assist in pumping and treating the groundwater. The SVE pilot study was concluded in 1993. Design of,the full-scale SVE system was completed in mid-1994, construction began shortly thereafter, and the SVE system became operational in early 1995. In 1998, EPA evaluated the SVE system and determined Site-specific remediation levels had been attained and verified. Once verified, the SVE system equipment was decommissioned and the Site restored. EPA also evaluated the use of irrigation as a means for disposal of the removed groundwater.. The Nebraska Department of Health performed a risk assessment and the results of this assessment determined that no unacceptable risks were associated with using irrigation as a disposal option. EPA modified the groundwater pumping and is allowing the pumped water to be beneficially reused for irrigation. This reduced the operating costs by approximately $100,000 annually. EPA completed the first Five-year Review of the Site activities in 1998, it determined that the remedy remained protective of human health and the environment,

LMC and EPA have sampled downgradient domestic water wells since 1990. The wells that have been sampled are shown on Figures 3 and 4. In 1994, chlorinated solvents were detected in a domestic well. In 1995, this well was reported as nondetect for chlorinated solvents. In 1998, the Preister domestic well showed the presence of tetrachloroethene above the MCL. Following the detection of chlorinated solvents the wellhead treatment systems were installed at the impacted domestic wells. The other domestic wells remained free, of Site-related contamination. All wells located downgradient of the facility are currently monitored.

In May 1998, LMC proposed conducting a three-month treatability study utilizing MW89-12 as the extraction well. Lindsay determined that water could be extracted from this well at a rate of

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60 gallons per minute. The extracted groundwater would be piped into the settling pond for air stripping through a modified irrigation system. As the residual contamination is in the top of the aquifer, pumping only the upper zone would be more efficient than pumping the entire aquifer. In October 1998, EPA notified LMC that EPA and NDEQ supported the modifications to use MW89-12 as the extraction well provide all remediation wells (OrW, AOIW, and TlW) remain in place until remediation levels are attained. In addition, EPA and NDEQ support the use of the low level contaminated groundwater as irrigation water during the summer months. In the fall of 1998, MW89-12 removed 6.2 million gallons of contaminated groundwater from the aquifer. In March 1999, OIW removed 30.5 million gallons of water from the aquifer. In the next six months, MW89-12 removed 12.8 million gallons of contaminated groundwater. In August 1999, . several nearby domestic residents' water supplies were tested to determine if they contained contamination from the Site. No new domestic supplies were found to contain contamination from Lindsay above the MCLs.

In November 2000, EPA held discussions with LMC in order to explain the levels of contamination present in selected MWs. MW89-14 was located in the sandy-channel area of LMC and the water in this well was from infiltration. MW89-15 was a deeper well and was screened across the aquitard/aquifer interface. Both wells were located within the facility's north access haul road and were routinely damaged by heavy trucks. Therefore, both wells were abandoned in July 2007 and were replaced with the installations of MW06-10 and MW06-11. Water levels in the sand and gravel aquifer fluctuate each summer based on seasonal irrigation demand. As the water levels drop, groundwater in the perched sand channel and in the silty-clays between the sand channel and the aquifer drain in part to the aquifer. The silty-clays between the sand channel and the aquifer contain chlorinated solvent residuum that continues to release to the aquifer. In 2000, drought conditions resulted in wider seasonal fluctuations In water levels in the aquifer. MW89-12 is screened in the sand and gravel aquifer. The levels of the VOCs removed from pumping of this well reflect migration of the contamination as it drains from the upper unit into the sand and gravel aquifer. Remediation efforts are focused on the capture of the VOCs present to protect the aquifer and to enhance the degradation of the contamination present. In 2000, approximately 23,000,000 gallons of contaminated groundwater was removed from . MW89-12. Irrigation wells removed contaminated groundwater, but the amount used for irrigation was not recorded. In 2001, approximately 19,000,000 gallons of contaminated groundwater were removed from MW89-12. Irrigation wells were used to remove the contamination migrating from the facility.

In 2001, Lindsay proposed additional work using an innovative technology, Hydrogen Release Compound (HRC), to enhance naturally occurring biodegradation of VOCs to address the residual aquifer contamination. The HRC was injected into the aquifer at 22 locations near the treatment lagoon. One hundred fifty pounds of HRC was injected at each location and this work was completed in September 2001. Quarterly groundwater monitoring was modified to include the inorganic parameters used to assess the effectiveness of the HRC. The groundwater monitoring program was modified to test for the inorganic parameters (dissolved oxygen, oxygen release, potential sulfate, sulfide, dissolved iron, and total iron) at MWs close to the injection locations. Based on data collected through February 2003, the field parameters monitored did not clearly indicate a change in the subsurface chemistry. This was thought to be because of the soils at the facility and the drought conditions which would have accelerated the movement of the

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HRC from the treatment zones into the aerobic aquifer.

In response to the 2008 FYR, LMC conducted multiple investigations to define the extent of the off-facility VOC plume. These investigations included the installation of additional off-facility monitoring wells, with the southern extent of the VOC plume defined by a group of sentry, wells. Interceptor well (IW) EXT11-01 was installed near the southern terminus of the VOC plume to capture VOC contamination downgradient of IW EXT07-02. A capture zone analysis of offfacility IWs G127000, EXT07-02, and EXT 11-01 indicated that the IWs had sufficient capture to control the horizontal and vertical extent of the VOC plume upgradient of the wells.

1,4-Dioxane has been detected in Site monitoring and interceptor wells. This compound is miscible in water and was used as a solvent stabilizer for 1,1,1-trichloroethane. Because 1,4dioxane is miscible in water, the current network of IWs are considered effective at capturing and extracting groundwater contaminated with the solvent.

In 2013, LMC installed EXT13-01approximatley 800 feet downgradient of the facility property boundary to intercept contaminated groundwater migrating off-facility. Pending National Pollutant Discharge Elimination System discharge approval; this well is anticipated to operate year-round as a hydrologic point of control and should expedite cleanup of the off-facility plume. Discharge from EXT 13-01 will be used for seasonal irrigation or discharged to Shell Creek during non-irrigation periods.

4.3 Groundwater Extraction System Operation/Operation and Maintenance

The groundwater extraction system currently consists of six extraction wells: G127000, EXT0702, EXT 11-01, AOIW, MW89-12, and EXT 13-01.

Table 4-2 presents the amount of groundwater extracted between January 2008 and March 2012. Groundwater pumping volumes after March 2012 were not available during the preparation of this document. EXT 13-01 was recently installed and has not yet operated as an extraction well. Therefore, no data is available for this interceptor well.

Table 4-2: Summary of Pumping Volumes During Review Period (gallons): Well No./Year 2008 2009 2010 2011 2012

Pumping Months

JanuaryDecember

JanuaryDecember

JanuaryDecember

JanuaryDecember

JanuaryMarch

MW89-12 16,319,248 22,769,176 4,363,700 8,011,726 897,200 AOIW 30,506,900 87,219,280 59,856,670 74,616,500 2,274,270

G127000 289,872,530 349,936,500 411,044,472 449,808,194 114,455,200 EXT07-02 219,687,060 475,405,068 513,933,720 526,950,835 129,857,000 EXT11-01 Not Installed Not Installed Not Installed 42,966,658 150,886,253 TOTAL 556,385,738 935,330,024 989,198,562 1,102,353,913 398,369,923

Table 4-3 presents the total mass of VOCs and 1,4-dioxane that has been removed by the inceptor wells from January 2009 through March 2012. Approximately 330 pounds of total VOCs have been extracted by the interceptor wells during this period, with the majority of the mass (235 pounds) associated with the off-facility interceptor wells.

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Table 4-3: Contaminant Mass Removed by Interceptor Wells Interceptor Contaminant 2009 2010 2011 2012.

Well No. (lbs) (through March)

MW89-12 Total VOCs 24.418 2.472 3.253 0.071

MW89-12 1,4-Dioxane 2.685 0.528 0.429 0.024

AOIW Total VOCs 35.69 20.361 8.557 0

AOIW 1,4-Dioxane 1.531 1.252 .NC 0

G127000 Total VOCs 24.836 27.83 29.686 6.689

G127000 1,4-Dioxane NC NC NC NC

EXT07-02 Total VOCs 77.755 34.934 21.319 4.01

EXT07-02 1,4-Dioxane NC NC NC NC

EXT11-01 Total VOCs Not Installed Not Installed 1.65 6.043

EXT11-01 1,4-Dioxane Not Installed Not Installed NC NC

Notes: NC The total mass removed was not calculated because this analyte was not detected above the method detection limit.

Operating and maintenance costs during the FYR period for the groundwater extraction system were requested from LMC. However, LMC did not supply these costs. Therefore, an evaluation of operating and maintenance costs during this FYR period could not be conducted.

Downeradient Wells (G127000. EXT07-02. EXT11-01) The stated purpose of the downgradient wells is to capture and remove contaminant mass that has migrated past the facility boundary and to minimize further downgradient migration of the contaminant plume. Well G127000 is located approximately mid-plume, 1.5 miles southsoutheast of the Lindsay facility and has historically pumped approximately 500 gallons per minute (gpm). Well EXT07-02 is located in the downgradient portion of the plume, approximately 2.6 miles south-southeast of the Lindsay facility and has historically pumped approximately 800-1,000 gpm. Well EXT11-01 was installed in October 2011 and is located in the distal portion of the plume, approximately 3.2 miles south-southeast of the Lindsay facility and has historically pumped approximately 1,100 gpm. Al l three wells are authorized by NDEQ to discharge to Shell Creek and therefore operate year-round. The extracted water from G127000 is routed to a "degassing pond" before eventual discharge through outfall OF001 at Shell Creek. EXT07-02 and EXT 11-01 discharge directly to Shell Creek via outfalls OF002 and OF003, respectively. These wells also discharge to the ground surface via irrigation of crops during the spring and summer months. A review of the semiannual Enhanced Groundwater Remediation Reports throughout the Five Year Review period indicates that G127000 and EXT07-02 have performed with minimal downtime or maintenance issues since their installation; operating data for EXT11-01 was only available from December 2011-March 2012 at the time of this writing, but it appears that the well has pumped nearly continuously and without difficulty during that timeframe. G127000 and EXT07-02 have consistently shown a significant cone of depression and plume capture throughout the Five Year Review period. A pump test was completed at EXT11-01 in April 2012. Subsequent capture zone analysis verified that EXT 11-01 appears to be effectively capturing the plume. Future monitoring will ensure compliance.

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Mass removal rates in the downgradient interceptor wells have been variable during the reporting period. At G127000, the amount of mass removed has been increasing. However, this is primarily because the amount of groundwater extracted has increased annually while VOC concentrations in the extracted groundwater have been slowly declining. The amount of mass removed at EXT07-02 has declined steadily despite an increase in the amount of water extracted each year. Limited data is available to evaluate EXT11-01, with contaminant concentrations fairly stable since start-up of the interceptor well. The available data indicates the VOC mass removal is minimal for the large volume of groundwater that is being pumped from out of the aquifer system. However, technically the off-facility interceptor wells appear to be removing contaminant mass.

Source Area Wells (AOIW. MW89-12) The stated purpose of the source area wells is to minimize migration of VOCs past the downgradient facility boundary. Well AOIW is located near the southeast corner of the facility boundary and has historically pumped at various rates averaging approximately 600 gpm. Well MW89-12 is located 400 ft. north of the facility boundary between the source area and well AOIW. MW89-12 has historically pumped widely varying rates as low as 100 gpm and as high as 1,500 gpm with an average of approximately 200 gpm. Both wells discharge extracted water to the surface via center pivot irrigation systems and do not discharge to Shell Creek. For MW89-12, it appears that discharge to Shell Creek would not be possible without treatment due to high levels of zinc. Because of their use as irrigation wells, they are only able to operate in non-freezing conditions, which equates to an approximate April through September yearly pumping period. The wells appear to have operated with minimal maintenance downtime over the Five Year Review period. In addition, a review of the monthly discharge volume records shows that both source area wells are operated intermittently, sometimes as little as 15 days a month during the FYR period, presumably as irrigation demand allows. It is possible that the ability to operate these wells continuously on a year-round basis could contribute to reduced contaminant migration to the downgradient plume and subsequent shorter time to Site cleanup.

Mass removal rates within the source area are generally trending downward. While the volume of groundwater extracted is still the primary driver in the quantity of mass removed, the concentrations of the primary VOCs (PCE, 1,1 -DCE, 1,1,1 -TCA, and 1,1 -DCA) in the groundwater extracted by MW89-12 have decreased significantly over the review period. The variability in the volume of groundwater that has been extracted from MW89-12 during the review period should be noted. It is uncertain if the decreasing VOC concentrations in MW89-12 indicate the general removal of significant areas of contaminant mass or if areas of significant contaminant mass still exist outside the immediate influence of MW89-12, but operation of MW89-12 has been too inconsistent to really impact these areas. VOC concentrations in the groundwater extracted by AOIW also decreased during the review period, though not as significantly as at MW89-12. The volume of groundwater extracted by AOIW has been less variable than at MW89-12, but there were still significant differences in the volume of groundwater extracted from year to year. As stated above, how the variability in the volume of groundwater extracted annually impacts contaminant concentrations in extracted groundwater is uncertain. But contaminant concentrations have been decreasing in the groundwater samples collected from the monitoring wells located along the facility boundary (MW06-06 to MW0608). It should be noted that these monitoring wells are likely within the radius of influence of

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AOIW when it is operating and that aquifer mixing with clean groundwater and mass transfer limitations may factor in to the decreasing concentration trend. However, it is most likely that the on-facility groundwater extraction has been effective at reducing groundwater contaminant mass.

It should be noted that traditional groundwater extraction technology is often inherently inefficient at reducing groundwater contaminant mass, meeting groundwater restoration goals and prolonged system-operating costs. Inefficiencies associated with the LMC groundwater extraction system include the asymptotic nature of pump and treat systems, matrix diffusion into the silty-clay, inadequate sand channel delineation, and a lack of understanding of the hydraulic interaction between the upper hydrostratigraphic unit and the underlying sand and gravel aquifer.

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5.0 Progress Since Last Review

The protectiveness statement in the third FYR concluded that the remedy at the Site, in its present state, is protective of human health and the environment. It further states that all contamination present within the source area at the Site has been addressed through the use of soil vapor extraction and groundwater extraction and treatment. The extent of groundwater contamination migrating from the facility has been generally determined and LMC has presented potential alternatives to enhance the remediation of the groundwater plume.

A number of issues were identified during the third FYR and the following recommendations and follow-up actions were proffered:

• Further assessment in the area of proposed construction activities will be conducted by LMC to determine the lateral and vertical extent, current and future risks, and whether any further action is warranted. LMC may need to consider supplemental remediation in other areas on the LMC facility property and other portions of the groundwater plume as part of their assessment for enhancing groundwater.

• Extraction well and discharge authorization for G127000 and EXT07-02 were completed by LMC to capture and treat the distal portion of the groundwater contaminant plume. If needed, additional MWs may be required to assess plume capture and treatment.

• An ecological technical assessment was performed to evaluate the discharge from the permitted location. Groundwater in well G127000 does not exceed acute aquatic criteria for metals and is well below conservative screening criteria for VOCs. However, additional samples for metals and hardness data from surface water in Shell Creek shall be collected and compared to surface water quality criteria. The additional data will provide a greater confidence interval for chronic aquatic criteria.

• LMC shall identify occupied structures located above the chlorinated solvent plume to determine if vapor intrusion .is likely in these structures, and if so, shall conduct vapor intrusion sampling to determine risk. If increased risk is identified that threatens human health, LMC shall take actions to reduce the risk, which may require a revision to the Site decision documents.

• The locations of detections for carbon tetrachloride and methyl tertiary butyl ether will be referred to NDEQ and EPA Site assessment programs for further evaluation and/or assessment if determined necessary.

• Review the following issues to determine an appropriate approach to minimize interruptions in plume remediation: consistent plume pumping; conducting timely activities concurrently to ensure that pumping remains consistent (obtaining substantive permit requirements; securing landowner access, and installation and maintenance of equipment, etc.); and adequate capture zone evaluation are issues that have been raised in past FYRs and evaluations. Evaluate laboratory and field qualify assurance/quality

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control (QA/QC) to ensure that decisions are based on the adequate quality data and comply with the Site O & M Plan and Quality Assurance Project Plan (QAPP).

• Review the availability of institutional control mechanisms and the opportunity to implement those at the Site.

These recommendations were addressed through the following actions during this FYR period:

• Multiple field efforts were conducted to collect sufficient water level and groundwater analytical data to fully delineate the southern portion of the chlorinated VOC plume and assess capture zones associated with the groundwater extraction wells. The scope of these activities included the following:

o Conducted two pump tests to assess the capture zones associated with interceptor wells G127000 and EXT07-02

o Completion of 28 electrical conductivity (EC) borings, 7 in the vicinity of interceptor well G127000 and 21 in the vicinity of interceptor well EXT07-02

o During Phase II, completion of 11 borings to support EC logging and groundwater vertical profile sampling, three near G127000 and eight near EXT07-02

Installation and development of six new monitoring wells near interceptor well EXT07-02

As part of Phase III, 10 EC borings were advanced and groundwater samples were collected along the 415th Avenue right of way in an attempt to define the southeastern terminus of the VOC plume

Ten EC borings were advanced and groundwater samples were collected during Phase IV field activities to precisely define the southeastern extent of the VOC plume

As part of Phase IV, advanced 16 EC borings using direct push technology at proposed monitoring and interceptor well locations in the southern terminus, with groundwater samples collected from 8 of the locations

Interceptor well EXT11-01 was installed during Phase IV field work to provide hydraulic containment, to maintain VOC plume capture, and to prevent further downgradient plume migration

During Phase IV, 16 monitoring wells were installed and sampled to monitor plume concentration and migration trends over time and to verify plume capture

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o EC borings were completed as six locations to further define subsurface stratigraphy and to obtain information to support installation of additional monitoring wells and an interceptor well

o An additional 16 monitoring wells were installed during Phase V to further asses hydrogeologic and hydrostratigraphic conditions near interceptor well G127000 and in the southern terminus area near interceptor well EXT11-01

• Multiple field efforts were performed to assess if source areas exist on the facility that were not previously identified or investigated and to assess if the Cell Area is a source of chlorinated VOCs, 1,4-dioxane, and metals to groundwater

o Direct push drilling was used to collect groundwater samples at 15 locations and soil samples from 14 locations

o Two hand auger borings were advanced to support collection of soil samples in the reaction pit area

o During Phase II, 21 soil borings, including 1 EC boring, were advanced, 7 temporary piezometers were installed for measuring water levels, soil samples were collected from 21 borings, and groundwater samples were collected from 5 locations

• To address the potential concern of off-gassing of chlorinated VOCs from contaminated groundwater, soil gas samples were collected from the Site

o Subslab soil gas samples were collected from 9 buildings and the guard shack located on Site

o Vertical profile soil gas samples were collected from three open areas'of the Site, within the groundwater plume area

• A Work Plan proposing sampling to support obtaining chromium speciation information to confirm chromium concentrations in Cells 1 and 2 are below risk screening levels was prepared

The primary conclusions from these evaluations included:

• Interceptor wells G127000, EXT07-02, and EXT 11-01 provide capture sufficient to control the horizontal and vertical extent of the VOC plume upgradient of the wells.

• A significant clean zone has been created around interceptor well G127000 and the VOC plume has been significantly narrowed around and downgradient of interceptor well EXT07-02

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• A VOC plume with concentrations greater than MCLs was present downgradient of interceptor well EXT07-02.

• Two continuous/discontinuous clay/silt lenses are present in the vicinity of interceptor well G127000 and four continuous/discontinuous clay/silt lenses are present in the vicinity of interceptor well EXT11-01

• High concentrations of VOCs, metals, and 1,4-dioxane in groundwater beneath the facility are consistent with a source area in the Cell Area

• Low concentrations of VOCs detected in samples collected at locations HP09-14 and HP09-15 may indicate a minor source of VOCs

• The highest VOC concentrations in soil were associated with borings advanced in the center and east-central portion of Cell 2

• A complete pathway exists for infiltration of impacted groundwater from the cell area to the sand and gravel aquifer

• Soils beneath the reaction pit are not considered a large potential source of VOCs or 1,4dioxane for the deeper subsurface

• Soils north of Building 3 do not appear to be a potential source of constituents of concern to the subsurface

• There is a potential source of VOC groundwater contamination beneath Building 1, with the most highly impacted area located beneath the eastern most portion of the building

• The lateral extent of impacted soils has not been fully resolved to the south or west of the cell area

• Preliminary risk characterization for indoor air for on-facility workers indicates that cancer and non-cancer hazards are below industrial target risk levels.

In addition to the above items, work is still in progress for a number of the items identified in the third FYR. Because of the costs associated with the amount of work performed, EPA allowed LMC to defer or prioritize the work associated with resolving the issues identified during the third FYR

• Samples were collected from Shell Creek to support an ecological assessment of the impact of discharging extracted groundwater to the creek. The actual ecological assessment has not been published yet and is still in progress

• Field work to support an off-facility vapor intrusion assessment was completed in January 2013

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6.0 Five-Year Review Process

6.1 Administrative Components r

The LMC FYR included the following team members: Brad Vann, EPA Remedial Project Manager, Ken Rapplean, EPA Interim Remedial Project Manager, EPA Region 7; and David Crawford, Risk Assessor, Vicki Murt, Hydrogeologist, Brad Trost, Process Engineer, and Travis Young, Project Manager, U.S. Army Corps of Engineers, Kansas City District (CENWK).

6.2 Community Involvement ' .

A public notice regarding the initiation of the FYR was placed in the Columbus Telegram on January 31, 2013, notifying the public of the start of the FYR process. The completed FYR report will be available in the Site information repository, the Columbus Public Library, 2504 14th Street, Columbus, Nebraska 68601; the EPA Superfund Division Records Center, 11201 Renner Boulevard, Lenexa, Kansas 66219; and NDEQ offices, 1200 N Street, Suite 400, Lincoln, Nebraska 68509.

6.3 Document Review

This FYR included a review of relevant information contained in a variety of Site-related documents. The information review primarily focused on documents produced after September 2008 (start of the fourth FYR time frame), but also included information presented in the CD, ROD, Third Five-year Review Report, boring logs, well construction details, and groundwater monitoring documents. A list of Site-related documents reviewed in total or in part during preparation of this FYR is listed in Attachment 3.

6.4 Data Review

Data quality concerns were identified as a potential issue in the previous FYR, with approximately half the samples collected during the previous FYR period having errors in consistency. LMC attempted to address this issue through several steps, including sampling audits conducted by URS and EPA and by revising the forms completed during sampling to collect additional information. However, sample consistency issues are still occurring based on the information provided in the data quality sections of the Groundwater Remediation Progress Reports. These issues include the presence of air bubbles in VOC samples, the presence of contaminants in sampling equipment blanks, laboratory related VOC contamination, and repeated hold time exceedances for hexavalent chromium groundwater samples.. While these errors were generally not considered significant enough to disqualify the associated data sets by chemists working for LMC"s contractor, it does indicate that errors continue to be made during the collection and handling of groundwater samples. Continued errors in the handling and analysis of analytical samples could impact the validity of the long-term monitoring data.

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6.4.1 Groundwater

The groundwater monitoring network consists of monitoring wells installed on the facility and located downgradient of the facility. Included in the groundwater monitoring program are a number of domestic, stock, and irrigations wells located side gradient and downgradient of the facility. Wells in the monitoring program are sampled on a quarterly or annual basis. Monitoring well locations are shown on Figures 3 and 4. Field parameters and analytical data for the monitoring wells through March 2012, are summarized in Attachment 4. Field parameters and analytical data for the impacted domestic, stock, and irrigation wells through March 2012, are summarized in Attachment 4.

6.4.1.1 Volatile Organic Compounds

To facilitate analysis of long term VOC trends in groundwater concentrations versus time graphs were prepared for select wells. Al l graphs were prepared using groundwater sampling data associated with samples collected from the deepest interval. Figure 9 presents the graphical representation of VOC sampling results for MW06-11, which is located along the northern edge of the VOC MCL plume. Figure 10 presents VOC concentrations for on-facility interceptor well MW89-12. Figure 11 presents VOC groundwater sampling results for MW06-08. This well is located within the center of the VOC plume along the southern facility boundary. VOC concentrations associated with off-facility well MW06-02A are presented on Figure 12. MW06-. 02A is located northwest of downgradient interceptor well EXT07-02 within the VOC MCL groundwater plume.

During the FYR review period, VOC concentrations were detected above MCLs at on-facility - wells AOIW, 01 Well, MW87-3, MW89-12, MW06-11, MW06-07, and MW06-08 and off-

facility wells MW04-02, MW06-02A, MW06-07, and MW11092C. The VOCs detected above MCLs were 1,1-DCE and PCE. At the wells where 1,1-DCE and/or PCE were detected above MCLs during this FYR review period, review of the analytical data indicate that concentrations appear to be decreasing at AOIW, OI Well, MW89-12, and MW06-08. Review of Figures 9 and 12 indicate that 1,1-DCE, 1,1,1-TCA, and PCE all appear to be generally trending upward at MW06-11 and MW06-02A. Well MW06-11 is located along the northern edge of the plume and is located hydraulically cross-gradient of the cell area, a known groundwater source. Despite being hydraulically cross-gradient, the close proximity of MW06-11 to the cell area is likely the cause of the increasing VOC concentrations and indicates that the cell area is continuing to impact groundwater. In addition, the Task 1 and 2 Work Plan Addendum indicate that VOCs were detected in a soil sample collected from boring SB-14, which is located approximately 200 ft north of the facility boundary, at a depth of 43 ft and 46 ft. This potential source area may be contributing to the increasing VOC concentrations detected at MW06-11. The increasing VOC concentrations in MW06-02A are most likely associated with the passage of a slug of contaminated groundwater with elevated VOC concentrations. VOC concentration spikes are discernible in the other concentration versus time figures (Figures 10 and 11) associated with the wells upgradient of MW06-02A, indicating that elevated VOC concentrations may be associated with some portions of the VOC groundwater plume. VOC concentrations at the remaining wells with VOC MCL exceedances were generally stable with no discernible trend.

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VOC concentrations at the domestic, stock, and irrigation wells downgradient of the facility were below MCLs during the January 2012 sampling event. PCE and 1,1-DCE were detected above MCLs in the Beller New Stock well at multiple sampling events during this FYR review period. It should be noted that VOC concentrations in the Beller New Stock well are trending downward. The third FYR assessed the impact of solvents in the contaminated stock wells and determined that consumption of contaminated groundwater by livestock did not result in unacceptable risk.

6.4.1.2 Metals and Other Parameters

During the FYR review period, zinc exceeded cleanup levels during at least one sampling event in on-facility wells MW89-12, MW06-11, and 01 Well. Zinc concentrations in 01 Well decreased towards the end of the FYR period, while concentrations in MW89-12 and MW06-11 were fairly static or increased slightly. On-facility wells MW06-02A, MW06-05, MW06-06, MW92-03A, and MW92-03B exceeded cleanup levels during this review period for one or more of the following metals: lead; iron; and chromium. Concentrations of lead, iron, and chromium decreased and were below cleanup levels in all wells by the end of the review period.

pH levels in all wells were fairly stable throughout the review period and was above the onfacility cleanup level of 5.0 and the off-facility cleanup level of 6.3.

6.4.2 Discharges to Surface Water

A review of the sampling results at outfalls OF001 (G127000), OF002 (EXT07-02), and OF003 (EXT11-01) shows no exceedances of the discharge authorization. The only compound with an established discharge limit is 1,1-DCE. The highest 1,1-DCE concentration detected in quarterly sampling during the FYR period was 17 ug/L from OF002 in August of 2008, well below the discharge limit, which is variable depending on time of year. Al l other VOCs listed on the discharge authorization are for monitor-only with no discharge limit, and none of the sampling results indicate concentrations of concern for discharge to surface water or a significant increase over time in any Site contaminant.

The source area wells, MW89-12 and AOIW, discharge all extracted water to the surface via center pivot irrigation, therefore no discharge samples are available. However, quarterly samples taken at the wells show that for MW89-12, 1,1-DCE, PCE, and zinc are the only compounds detected above cleanup criteria, with all VOC concentrations generally decreasing over the FYR period. Zinc concentrations have remained steady. For AOIW, PCE is the only compound detected (11 ug/L) above cleanup criteria, and concentrations have generally decreased over the FYR period.

6.4.3 Groundwater Use Review

There are a number of domestic, stock, and irrigation wells located downgradient of the facility that utilize groundwater contaminated with VOCs. The wells are included in the groundwater monitoring program and are sampled on a quarterly or annual basis. Whole house treatment systems have been installed at the wellheads of two impacted domestic wells (Beller and Preister Homes). The whole house treatment systems consist of three granular activated carbon vessels

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configured in series near the wellheads. The whole house treatment systems are sampled quarterly and maintained by LMC.

With the exception of the residential houses located directly south of the facility, the majority of the off-facility groundwater plume is located beneath property owned by the Beller and Preister families. LMC and regulators are in frequent contact with both families, and therefore, installation of additional wells within the plume without the knowledge of LMC is considered extremely unlikely. The Village of Lindsay supplies water to the residential houses located directly south of the facility.

No other new industrial, commercial or residential activities or well installations were noted in the vicinity of the Site.

An on and off-facility VI study was recently completed and concluded that no VI risks associated with contaminated groundwater exist for LMC employees or Lindsay residents located to the south of the facility.

6.5 Site Inspection

A Site inspection was conducted on November 8, 2012 by Ken Rapplean, EPA; Deborah Myers, NDEQ; Vicki Murt and Travis Young, CENWK; Karen Mixon, URS; and Bob Jacobson, Sharon Huey, Eric Arneson, Cameron Kaufman, Bob Rother, Geralyn Ramold, and Greg Osnald, LMC.

The purpose of the Site inspection was to assess, the condition of the remedy and any issues that could negatively affect the protectiveness of the remedy. The Site inspection assessed the overall maintenance of the Site, the surface integrity of the groundwater extraction wells and associated equipment, and perimeter fencing.

Prior to the Site inspection, the inspection team met inside a conference room at LMC for introductions and to discuss the itinerary. The Site inspection began by touring the LMC facility, including all associated production buildings. After touring the production buildings, the inspection team proceeded to the north side of the Site to view the Cell Area and the Reaction Pit (Photos 1 and 2). The Reaction Pit was covered with metal plates, which appeared to be effective at preventing the accumulation of precipitation within the pit and physically prevented unauthorized access.

The inspection team then proceeded to the on-facility interceptor wells, starting with MW89-12 (Photo 3). This well is located east of Building 1 near one of the original source areas. The interceptor well (IW) was offline, but appeared to generally be in good condition with the casing and well pad appearing to be sound. The inspection team then proceeded to the other on-facility IW AOIW (Photo 4), which is located near the southeast corner of the facility. This IW was also offline because of low temperatures. Even though the sampling port was unlabeled and appeared to exhibit some corrosion the well and associated above ground groundwater conveyance piping appeared to be in good condition.

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After completing the on-facility phase of the inspection, the inspection team proceeded offfacility. The first stop was to inspect one of the center pivot irrigation systems used to discharge groundwater extracted by the off-facility rWs (Photo 5). The system inspected was representative of the system of center pivot irrigation systems used by LMC.

The inspection team then proceeded to the well house for IW G127000 (Photo 6), which is the northern most off-facility IW. The well house is located in the middle of an agricultural field and was in good condition. A fan was being used inside the well house to cool the pump motor for IW G127000 (Photo 7). The well pad, pump motor, and visible aboveground piping appeared to be in good condition. During the Site inspection, groundwater discharged from G127000 was being routed through an aeration basin (Photo 8) to promote decreases in VOC concentrations through volatilization prior to discharge to Shell Creek (Photo 9). The aeration basin had recently been dredged, with the excavated soils present along the banks of the basin. Water within the basin appeared to be flowing well from the inlet to the basin on the northern end to the discharge point on the south end. There appeared to be no significant erosion at the discharge point to Shell Creek despite a lack of any engineered structures to dissipate energy from the discharged water. •

') The next off-facility stop for the inspection team was IW EXT07-02. Because of the potential for flooding associated with nearby Shell Creek, the EXT07-02 well house is elevated above ground level (Photo 10). A small water leak was visible in a pipe joint on the discharge piping that conveyed extracted groundwater to Shell Creek for discharge (Photo 11). Based on the amount of corrosion present, the leak appeared to have been occurring for some time. The piping and associated support equipment inside of the EXT07-02 well house appeared to be in good condition, with some minor corrosion visible (Photo 12). No significant erosion was visible at the discharge point to Shell Creek (Photo 13).

The final stop for the inspection team was IW EXT 11-01 (Photo 14). The IW was installed within the last two years and the well house and all associated groundwater conveyance piping were in good condition. The interior of the well house and all support equipment were all in excellent condition (Photo 15). The discharge to Shell Creek was at approximately the water level of the creek and did not have the vertical drop to the creek of the other two off-facility IWs. No erosion was visible at the discharge point (Photo 16).

6.6 Interviews

Interviews were conducted at several different locations and by several different methods. Face to face interviews were conducted at the Site and at a restaurant in Columbus, Nebraska. The following individuals were interviewed on November 8, 2012 at the LMC Site: Karen Mixon, URS and Bob Jacobson, Lindsay Manufacturing Company. The following individual, was interviewed at the McDonalds restaurant on November 8, 2012: Deborah Myers, NDEQ. Ken Rapplean and Brad Vann, EPA, were interviewed by telephone on November 16, 2012.

Al l interviewees stated that they had been welfinformed about the Site's activities and progress, that a lot of progress had been made at addressing potential issues since the last FYR, and that they had no concerns regarding the protectiveness of the Site. Each interviewee also stated that

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FOURTH FrVE-YEAR REVIEW REPORT

steps are being taken that could accelerate groundwater remediation by addressing source zone remediation in the Cell Area.

Mrs. Myers (NDEQ) and EPA personnel expressed concern about adequate quality assurance and quality compliance and associated checks for groundwater samples collected on and offfacility.'EPA personnel and Mrs. Myers also expressed concern about the geologic Site conceptual model, specifically the presence of water in the upper confining layer. While Mrs. Myers and EPA expressed concern about off-facility vapor intrusion, both acknowledged that LMC were in the process of conducting an investigation that should address their concerns. No interviews were conducted with members of the public, specifically landowners located downgradient of LMC. However, both LMC and EPA are in frequent contact with impacted land owners, and therefore, are able to address any questions or concerns that arise.

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7.0 Technical Assessment

Question A: Is the remedy functioning as intended by the decision documents?

Question B: Are the exposure assumptions, toxicity data, cleanup levels and remedial action objectives (RAOs) used at the time of the remedy selection still valid?

Question C: Has any other information come to light that could call into question the protectiveness of the remedy?

7.1 Question A: Is the remedy functioning as intended by the decision documents?

No. It is unlikely that the remedial action implemented to date will effectively restore the onfacility aquifer(s). Until on-facility contamination has been effectively addressed off-facility migration will continue and full restoration of the off-facility groundwater will not occur. Remedial actions implemented off-facility appear to be effectively containing the migration of the off-facility VOC plume present in the lower sand and gravel aquifer. However, a rigorous horizontal and vertical capture zone analysis has not been performed for the two on-facility and three off-facility extraction wells. Also, the nature and extent of contamination in the upper confining groundwater unit is not adequately characterized. Additional data collected in source areas and confining groundwater unit, in addition to monitoring and statistical analysis of the data collected from the newly installed performance and sentinel monitoring wells, should be collected and evaluated to both update the conceptual site model and update the capture zone analysis.

7.1.1 Remedial Action Performance

A review of Site documents, applicable or relevant and appropriate requirements (ARARs), risk assumptions, and the results of the Site inspection indicate that the remedy implemented off-facility is functioning as intended by the ROD. Off-facility groundwater extraction is making progress by removing contaminant mass towards achieving the RAOs of restoring the aquifer to acceptable water quality levels that are protective of human health and the environment. The remedial action has hydraulic control of the off-facility VOC plume and is preventing further groundwater degradation in other areas. In addition, VOC concentrations in various monitoring points appear to be decreasing, indicating that the selected remedy is operating as intended. The on-facility extraction wells continue to remove mass when operating. The extracted water is effectively being treated for irrigation purposes.

7.1.2 System Operations/O&M

A review of the Site's O&M records indicates that the remedy is functioning as designed in that the groundwater extraction wells have performed with few maintenance issues. Discharge limits have been consistently met for those wells that discharge to surface water. VOC concentrations in extracted groundwater appear to be trending downward, but have not been verified by statistical analysis using data from the newly installed performance monitoring and sentinel wells. The ability to discharge large volumes of water to Shell Creek has allowed the off-facility

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LINDSAY MANUFACTURING COMPANY.

FOURTH FlVE-YEAR REVIEW REPORT

interceptor wells to operate continuously and has resulted in an area of groundwater with VOCs below remediation goals in the immediate vicinity of G127000.

Consistency issues with the groundwater samples collected at the Site continue to be a problem. Issues noted during this FYR review period include the presence of contaminants in sampling equipment blanks, laboratory related VOC contamination, the presence of air bubbles in VOC samples, and repeated hold time exceedances for hexavalent chromium groundwater samples. Though these errors typically did not disqualify the associated data sets, it does indicate that errors continue to be made during the collection and handling of groundwater samples.

Because of the pump types and the high flow rates the pumps operate at, the analytical data collected from the interceptor wells may not represent actual in-situ VOC concentrations. With the exception of MW89-12, the interceptor wells are extracting hundreds of gallons of water per minute, have long screen lengths, and have irrigation type pumps. Extracted groundwater is collected from spigots at this well and may be aerated due to the volume, and not representative of actual VOC concentrations. While monitoring wells near the extraction pumps are also sampled, the proximity of the monitoring wells to the interceptor wells means the monitoring wells are well within the cone of depression created by the extraction wells, and therefore, the associated VOC concentrations are likely highly dynamic.

7.1.3 Opportunities for Optimization

Zinc concentrations are currently the focus of the Nebraska Surface Water Quality Standard for discharge to Shell Creek. Based on this standard groundwater extracted on facility is sent to irrigation pivot systems that are only operated during the agricultural growing season. Strategies should be reviewed so that continuous operation of the on-facility interceptor wells can occur. PCE values are near the Nebraska Surface Water Quality Standard for chronic exposure to PCE (33 ug/L) though the current discharge authorizations for OF001, OF002 and OF003 have no limits for this VOC. It is possible that by routing water from these wells to an aeration pond similar to that used for G127000 may allow for volatilization of PCE and other VOCs for subsequent discharge to Dry Creek, a tributary of Shell Creek. For example, AOIW is currently operated from approximately April-October, and only intermittently during this time. A review of the historical records shows that some months have as few as 15 pumping days. Another option that may be considered is the use of extracted groundwater for non-growing season irrigation.

In addition, it's recommended that the Site operator evaluate pumping rates from the extraction wells, particularly in the downgradient wells (G127000, EXT07-02, EXT 11-01). It is understood that the operator uses water pumped during the agricultural growing season for irrigation and therefore may need the large quantities of water that are withdrawn (typically on the order of over 500 gpm per well). However, during the winter months this same quantity is withdrawn and discharged to Shell Creek. A groundwater model that determines the minimum pumping rates to maintain hydraulic containment during the non-growing season may prove advantageous to the Site operator from both energy usage and water resource sustainability standpoints.

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LINDSAY MANUFACTURING COMPANY FOURTH F I V E - Y E A R REVIEW REPORT

/ Options for mitigating VOC and metal source areas located on-facility should be evaluated to facilitate the reduction of contaminant flux to Site groundwater in each aquifer media type. Groundwater restoration is unlikely to occur within 30 years until contaminant mass present in existing source areas has been effectively reduced or eliminated. By reducing contaminant flux from existing source areas the time required to achieve groundwater cleanup levels would be greatly reduced. For example, mitigating zinc flux from existing source areas would likely enable extracted groundwater to be discharged to surface water allowing continuous operation of the on-facility interceptor wells. Continuous operation of the on-facility interceptor wells would shorten groundwater cleanup times and allow shutdown of the off-facility interceptor wells sooner than currently anticipated.

As the Site extraction well system is currently operated for approximately half of the year, contaminant mass is,allowed to migrate downgradient and will necessitate plume containment for a very long period of time. A focused alternative source area remediation project would likely prove beneficial in significantly reducing mass flux to the groundwater, thereby reducing the remediation timeframe and aquifer restoration goal.

7.1.4 Early Indicators of Potential Issues

Recent investigations were conducted to determine the potential presence of other on-facility source areas and to more fully define existing source areas. The results of these investigations indicate that an additional source has not been fully defined. The lateral extent of contamination for known sources also requires further definition. One additional source area that requires further definition is the reported historical disposal location of solvents and the draining of turnings located on the north side of Building 1. Elevated concentrations of 1,1-DCE, TCE, and PCE were detected in groundwater samples collected from boring HP09-10. The lateral extent of this contamination to the north and west of Building 1 has not been fully defined. And while the disposal of solvents is a likely source of the contamination, the drainage ditch located along the north side of Building 1 should also be investigated as a potential source area.

The lateral extent to the south and west of VOC contamination associated with the Cell Area is not known. There is a lack of suitable monitoring wells to the west of the Cell Area, specifically the northwest outdoor Warehouse area and west and northwest of Building 2. In addition, the collection of further geologic and hydrologic data from this area would be beneficial in the refinement of the Site hydrogeologic model.

For example, groundwater flow within the upper silts and silty-clays and sand channel deposits, and hydraulic communication between these units and the lower sand and gravel unit is poorly understood. This data gap is due to a lack of information regarding the areal extent of the upper sand channel deposits (Figure 8), and the number of monitoring wells installed within the upper silts and silty-clays and the upper sand channel deposits. Currently, there are only two • monitoring wells installed within the upper sand channel deposits that are monitored, MW06-11 located near the upgradient edge of the plume and MW89-13 located near the "toe" of the sand channel deposits. No monitoring wells are currently installed in the upper silts and silty-clays, nor are there side gradient monitoring wells that are monitored on facility. There is currently no data regarding the hydraulic interconnection between the upper and lower hydrostratigraphic

31


units, nor the hydraulic influence that the on-facility extraction wells may exert on the upper hydrostratigraphic units while pumping.

Three monitoring wells were recently installed in the upper silts and silty-clays, and sandy-silt deposits to the south of LMC and two wells are installed in the sand channel deposits on-facility. Because the three monitoring wells just south of Highway 91 were recently installed, data collected from these wells were not available for inclusion in this report. It is not know if offfacility migration of VOCs in this hydrostratigraphic unit has occurred.

No groundwater sampling of the upper hydrostratigraphic unit was performed during the most recently reviewed hydropunch work from 2009-2011 near the off-facility extraction well systems. However, there were VOC detections just below this unit in the upper-most portion.of the sand and gravel aquifer. This area is more than two miles south of FMC.

7.1.5 Implementation of Institutional Controls and Other Measures

The facility is surrounded by a security fence and is an access controlled operating manufacturing facility with security. Therefore, any potential exposure to on-facility contamination is considered unlikely. Because of state regulations, institutional controls preventing installation of domestic supply wells off-facility is not considered feasible. There is currently a moratorium by the state of Nebraska on the installation of additional irrigation or stock wells. While there is potential for the Installation of an off-facility domestic supply well, residents within the Village of Lindsay are connected to the Lindsay public water system. LMC monitors the downgradient portion of the plume for installation of any new wells and would coordinate with the owner of new wells to prevent exposure.

7.2 Question B: Are the exposure assumptions, toxicity data, cleanup levels and remedial action objectives (RAOs) used at the time of the remedy selection still valid?

Yes.

7.2.1 Changes in Standards and To-Be-Considered Criteria

• Have there been changes to risk-based cleanup levels or standards identified as Applicable or Relevant and Appropriate Requirements (ARARs) in the Record of Decision (ROD) that call into question the protectiveness of the remedy? The EPA is not aware of any changes in ARARs which would call into question the protectiveness of the remedy.

• Are there newly promulgated standards that call into question the protectiveness of the remedy? The EPA is not aware of any newly promulgated standards that call into question the protectiveness of the remedy.

• Have TBCs used in selecting a cleanup level at the Site changed in a way that could affect the protectiveness of the remedy? The EPA is not aware of any changes to a TBC

32

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used in selecting a cleanup level that could affect the protectiveness of the remedy.

7.2.2 Changes in Exposure Pathways

• Has land use or expected land use on or near the Site changed (e.g., industrial to residential, commercial to residential)? The EPA is not aware of any land use changes at or near the Site.

• Have any human health or ecological routes of exposure or receptors changed or been newly identified (e.g., dermal contact where none previously existed, new populations or species identified on or near the Site) that could affect the protectiveness of the remedy? The EPA is not aware of any newly identified routes of exposure that could affect the

• protectiveness of the remedy. EPA notes that in the previous FYR, vapor intrusion, particularly vapor intrusion in the residential neighborhood immediately south of the facility, was identified as a potential route of exposure that needed to be evaluated. The results of a recent vapor intrusion study conducted in the residential neighborhood south of the facility concluded that vapor intrusion risks are within acceptable ranges.

7.2.3 Changes in Toxicity and Other Contaminant Characteristics

• Have toxicity factors for contaminants of concern at the Site changed in a way that could affect the protectiveness of the remedy? With the exception of hexavalerit chromium, the EPA is not aware of any changes in the toxicity of contaminants of concern since the previous FYR which might affect the protectiveness of the remedy. It is now believed that oral exposures to hexavalent chromium (Cr6) may cause cancer. It is also believed that Cr6 may cause cancer via a mutagenic mode of action, which increases the cancer potency for children and sub-adults. It should be noted that groundwater samples

collected by LMC within-the past year have been speciated by Cr6. These results and possible risks will be addressed along with the vapor intrusion results in the pending site supplemental risk assessment.

• Are there newly identified contaminants or contaminant sources? Since the completion of the last FYR, hexavalent chromium (Cr6) has been shown to be carcinogenic by the oral exposure route. Additionally, Cr6 has been shown to be carcinogenic by a mutagenic mode of action. These changes increase the potential for Cr6 to cause cancer, especially for children and sub-adults who are considered to be more susceptible to the mutagenic effects. This FYR recommends that samples collected in the future from this site continue to be analyzed for Cr6.

• Are there unanticipated toxic byproducts related to the contaminants at the site or related to the implementation of the remedial action which were not addressed by the decision documents (e.g.. byproducts not evaluated at the time of remedy selection)? The EPA is not aware of any unanticipated toxic byproducts.

33

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• Have other contaminant characteristics changed in a way that could affect the protectiveness of the remedy? The EPA is not aware of any changes to contaminant characteristics that could impact the protectiveness of the remedy.

7.2.4 Changes in Risk Assessment Methods

Have standardized risk assessment methodologies changed in a way that could affect the protectiveness of the remedy? The EPA is not aware of any changes in risk assessment methodologies since the previous FYR that would affect the protectiveness of the remedy.

7.3 Question C: Has any other information come to light that could call into question the protectiveness of the remedy?

• Have Site physical conditions (e.g., changes in anticipate direction or rate of groundwater flow) of the understanding of these conditions changed in a way that could affect the protectiveness of the remedy? The EPA has no information to show that Site conditions or the understanding of these conditions has changed in a way which could affect the protectiveness of the remedy.

• Has any other information come to light which could affect the protectiveness of the remedy? The EPA is not aware of any other information which could affect the ' protectiveness of the remedy.

Ecological Risks

During the previous FYR, the EPA provided an ecological technical assessment to evaluate potential ecological risk due to direct exposure to aquatic life via groundwater discharged to Shell Creek, exposure to wildlife consuming water from Shell Creek, and exposure to livestock via ingestion of groundwater in stock wells.

Based upon the results of this ecological assessment, no significanfrisks to livestock or wildlife were identified. However, potential risk to aquatic life in Shell Creek was identified based on limited surface water data. The EPA recommended collecting additional metals and hardness data from surface water in Shell Creek and comparing that data to the water quality criteria as well as to data from a suitable reference location upstream. This sampling has been completed, and it is expected and recommended that the results will be assessed in the ecological assessment of Shell Creek. Since the ecological assessment of Shell Creek is not yet complete, this FYR recommends that the next FYR incorporate and use that assessment.

7.3.2 Natural Disaster Impacts

• Are there impacts from natural disasters (e.g, a 100-year flood) that could have impacted the protectiveness of the remedy? The EPA is not aware of any natural disasters having occurred at or near the Site.

34


7.3.3 Any Other Information That Could Call Into Question the Protectiveness of the Remedy

Investigations conducted since the last FYR to determine the potential presence of other onfacility source areas indicate that an additional source area may exist that has not been fully * defined. An area located on the north side of Building 1 was reportedly used for the historical disposal of solvents and the draining of turnings. Elevated concentrations of 1,1-DCE, TCE, and PCE were detected in groundwater samples collected from boring HP09-10. The lateral extent of this contamination to the north and west of Building 1 has not been fully defined.

The lateral extent of VOC and metals contamination associated with the Cell Area is not fully known. There is a lack of suitable monitoring wells to the west of the Cell Area, specifically the northwest outdoor Warehouse Area and west and northwest of Building 2. In addition, the collection of further geologic and hydrogeologic data from this area would be beneficial in the refinement of the Site hydrogeologic model.

7.4 Technical Assessment Summary

There have been no changes in the physical condition of the Site that would affect the protectiveness of the remedy. According to documents reviewed and the November 8, 2012, Site inspection, the selected remedy is appropriate to contain the plume in the lower sands aquifer. However, data indicates that there are residual source areas present on the facility property that are prohibiting the timely restoration of the aquifer. In addition, additional data is needed to create a robust conceptual site model. The conceptual site model will be used to evaluate the hydrogeology at the Site, define the sources, and ensure that the groundwater extraction system is effectively capturing and containing the plume.

There have been no changes in the risk assessment methodology that could affect the protectiveness of the remedy. No additional information has been identified that would affect the protectiveness of the remedy.

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8.0 Issues

The following table presents the issues or deficiencies identified during this FYR period that could prevent the remedy from being protective. Included are issues from the previous FYR that were not resolved during this FYR period.

Issue No. Issue Affects Protectiveness

(YIN) Issue No. Issue Current Future

1

Evaluation of the data quality criteria for the analytical samples collected over the past five years indicate that errors continue to be made in sample handling and consistency. Continued errors in the handling and analysis of analytical samples could impact the validity of the long-term monitoring data. This is a carryover issue from the previous Fiveyear review and has not been sufficiently addressed during this review. period.

N Y

2

Groundwater flow within two of the three identified geologic units beneath LMC, and hydraulic communication between all three units are poorly understood. This is due to geologic uncertainty regarding the areal extent of the sand channel deposits, i.e. west to east, and a lack of monitoring wells installed within the upper silts and.siltyclays, and sand channel deposits.

N Y

3

Source areas have not been effectively addressed and mass flux from these source areas continues to impact groundwater. Until these source areas are effectively reduced or eliminated,aquifer cleanup goals are unlikely to be obtained within a 30 year period from remedy implementation.

N Y

4

Results from a recent investigation indicate that the source area north of Building 1 has not been fully delineated. In addition, the Cell Area source(s) has not been fully characterized.

N Y

5 The full nature and extent of VOCs in the upper hydrostratigraphic unit (silts, N Y

36

J

-

-

LINDSAY MANUFACTURING COMPANY FOURTH F IVE-YEAR REVIEW REPORT

Issue No. Issue Affects Protectiveness

(Y/N) Issue No. Issue Current Future

silty-clays and sandy silt deposits) has not been fully delineated. Although the full nature and extent of contamination is not defined, no public water supplies are installed in this hydrostratigraphic unit and vapor intrusion studies, conducted on facility and off facility, have indicated no risks through that pathway. Three new monitoring wells were installed during the winter of 2013, and are located just south of the facility, sampling results were not available for review for inclusion in this report. VOCs were detected just below the contact of the upper hydrostratigraphic unit and the sand and gravel aquifer more than two miles south of the facility.

6

The previous Five-year Review recommended the collection of surface water samples from Shell Creek to obtain metals and hardness data. Collection of this data was to provide a greater confidence interval for chronic surface water ecological criteria.

N Y

37


9.0 Recommendations and Follow-up Actions

The attached table provides a list of recommended actions to address the issues identified in Section 8.0 above. ,

1 Issue No.

Recommendations/Follow-up Actions

Party Responsible

Oversight Agency

Milestone Date

1

Review the current Quality Assurance Project Plant (QAPP) and Operations and Maintenance (O&M) Plan and revise the documents as needed. Conduct frequent audits of sampling activities to ensure sample collection and handling procedures are in accordance with the QAPP and the O&M Plan and take corrective actions as needed. Audit the analytical laboratory to assure compliance with applicable project procedures and industry practices.

PRP EPA September 2014

2

Hydraulic testing (i.e. pump testing) and consistent water level monitoring of wells installed within the three units on Site during pumping and nonpumping events would be beneficial in determining the hydraulic interconnection of the three units, potential differences in the direction of groundwater1

flow, and effects on contaminant transport. The lateral extent of the sand channel deposits should be delineated. The hydraulic interconnection between the upper silt to siltyclays and sand channel deposits should be characterized. The hydrologic connection of these units to the lower sand and gravels should be established in order to assist in the evaluation


38

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-

LINDSAY MANUFACTURING COMPANY FOURTH F IVE-YEAR REVIEW REPORT

1 Issue No.

Recommendations/Follow-up Actions

Party Responsible

Oversight Agency

Milestone Date

of the effectiveness of the onfacility portion of the remedy. This data can be used for remedy optimization and future adjustments of the on-facility extraction well system.

3

Evaluate remedial alternatives to remediate in-situ or remove impacted source media. It should be noted that LMC has agreed to conduct targeted source area removal via ex-situ and/or in-situ methods in 2014.


4

Perform additional characterization to delineate the vertical and horizontal extent of contamination. In addition, the characterization should include the collection of sufficient geologic and hydrogeologic data so that the hydraulic communication between the different geologic units is understood. LMC has agreed to conduct further source area delineation in 2013; however, the specific areas targeted for investigation are not yet known.

PRP EPA

, r

September 2014

5

The results of the newly installed monitoring wells should be evaluated to define the full extent of VOCs in the upper hydrostratigraphic unit. Should VOCs be detected it is recommended that hydropunchsampling of this unit be performed downgradient of LMC.

PRP EPA September: 2014

6

The additional metals and hardness data from the surface water in Shell Creek has been collected. This data should be utilized to prepare an ecological risk assessment for Shell Creek.


39

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'

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The following recommendations that do not affect current or future protectiveness were identified.

Opportunities to reduce costs associated with the groundwater extraction rates for the off-facilify interceptor wells may exist. The off-facility VOC plume could likely be contained with lower pumping rates, resulting in energy cost savings to the PRP and preservation of the groundwater resource.

It is recommended that the PRP amend the Enhanced Groundwater Remediation Progress Reports to include additional information. The reports should include a more detailed analysis and discussion of VOC concentration trends in groundwater, with the addition of graphs and statistical analysis (i.e., Mann-Kendall) for select wells. Wells selected for graphical and statistical analysis should include a number of wells outside the radius of influence of the operating interceptor wells. Revising the progress reports with this information would increase reporting costs initially, but once the graphical and statistical baselines are established, the additional effort associated with updating the graphs and statistical analyses in subsequent reports would be minimal. Inclusion of graphical and statistical analysis in the progress reports would allow trends in plume extent and composition to be more easily identified and facilitate changes in pumping .or containment strategies that could result in cost savings for the PRP by more effectively managing the groundwater plume. In addition, the discussion of any actions taken by the PRP in maintaining the home treatment systems should be expanded to include documentation of any associated carbon change outs and any operational/maintenance issues during the reporting period. The expanded discussion would better document the PRPs actions in maintaining and ensuring functional home treatment systems for the impacted off-facility homeowners.

The PRP should work with stakeholders to evaluate and establish criteria for the eventual shutdown of the groundwater extraction system, or at least the furthest downgradient extraction wells. Once the plume reaches a steady-state condition (i.e., migration rate equals attenuation rate) there would be no threat of further plume migration and potentially little benefit to the continued operation of the downgradient interceptor wells from a hydraulic control standpoint. Groundwater attenuation modeling or a mass flux approach using the current extraction well network could be used to predict steady-state plume extent and demonstrate decreasing downgradient flux.

The environmental samples collected from the Site and analyzed for metals have reported chromium results as total chromium. Cr6 is associated with the manufacturing activities conducted at LMC. Because oral exposures to Cr6 may cause cancer and because Cr6 may cause cancer via a mutagenic mode of action, samples collected from the site and analyzed for metals should include valent-specific data for Cr6.

40

1


In 1996, the Nebraska Department of Health performed a risk assessment which determined that no unacceptable risks were associated with using irrigation as a disposal option. By the next FYR, this risk assessment will be over 20 years old. It is recommended that the next FYR include a streamlined risk assessment of the continued use of irrigation as a disposal option. This streamlined risk assessment should be based on toxicity values and contaminant concentrations current at the time, and should evaluate all potential routes of exposure.

41



10.0 Protectiveness Statement

The remedy at the Lindsay Manufacturing Co. Site currently protects human health and the environment because the off-facility plume is hydraulically controlled, vapor intrusion sampling showed no unacceptable risk, and no public supply wells within the footprint of the plume are being used for drinking water. However, in order for the remedy to be protective in the longterm, the following actions need to be taken to ensure protectiveness. These actions include reassessment of the current geologic Site conceptual model, defining and remediating source areas, evaluation of the nature and extent of VOC contamination upper hydrostratigraphic unit, and conducting a robust horizontal and vertical capture zone analysis.

42,

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11.0 Next Review

The next FYRTor this Site will be conducted within five years of the EPA's signed concurrence with this.FYR. The exact date cannot be established at this time, but the next FYR is expected to be completed in 2018.

43


12.0 References

2004. J.A. Cherry, B.L. Parker, K.R. Bradbury, T.T. Eaton, M.G. Gotkowitz, and D.J. Hart Role of Aquirards in the Protection of Aquifers from Contamination: A "State of the Science" Report. Published by the Awwa Research Foundation. http://www.clu in.org/download/contaminantfocus/dnapl/Chemistry_and_Behavior/Aquitard_State of Science Reportfor AWWARF draft ofl-3-05.pdf

44

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r

FIGURES

THIS PAGE LEFT BLANK

SOURCE: USGS 7 5-minute topographic map. Lindsay. Nebraska, revised 1985

Nebraska

2.000

Scale in Feet

4,000

Job No. 33762801 Figure 1

Vicinity Map Lindsay Manufacturing

Lindsay, Nebraska

300

Scale in Feet

600

go (A Job No. 33759811

URS

Figure 2 Historical Facility Layout - 1982

Lindsay Manufacturing Lindsay, Nebraska

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D o m n t l c i n d Irrigation Wel Key

0 Ben Pfalfw (D) 0 John K m a m (D)

0 Eddy Luettenhaus (D) Q New Pretater Domestic (2003)

0 Doug Belter (D) 0 BeltorStocN Wel (G122019)

0 RonPfeirar(D) 0 Dave Chorion (D)

0 Old M o r m c (0) Q Beller loigetion (#6753S)

0 BeflerDonmtic 0 Weylar. Nas (G3179B) (I)

0 Beller Stock (Old) 0 RJcftanJ Wagner (!)

S Monrtormg Wal

S Interceptor Wel

0 Municipa Drinking water Wel

S Abandoned Monitoring Wal

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T Hydropunch

O VOC Above MCLa Plume Bourtoary (Based on one or more exceedsncee at M C U since 2003) (Dashed where Interred)

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completed n 2009 and 2010. 0 Preieter Stack Wel Q John Klassen (G5B241)(|)

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0 Tom JarecW p ) Q Jim rOassen (I)

0 Lester Kopedty (D) 0 Pretstv Irrigation Wel (33637)

0 Jim Naaaen (D) 0 Marliachang (I)

0 TomUefatrikfD) 0 Klassen's SF Irrigation (I)

<« no

SCALE IN FEET

Figure 3 Site Monitoring/ Interceptor Well

and Hydropunch Locations


-

- : ,

— — -

l

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l

l l

l l

i

i

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l

Figure 4 Downgradient Site

Monitoring/Interceptor Wells and Hydropunch Locations


A Southwest

A' Northeast

1680-,

1660

1640

S 1620

j i K 1600

1580 H

1560

HP11-01 MW11-01A MW11-01B

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1660

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SP Poorly-graded sands, gravelly sands, little or no fines

SC-SM Clayey sands to silty sands

ML Inorganic silts, silty or clayey fine sands, or clayey sills with slight plasticity

CL Inorganic clays of low to medium plasticity, gravelly days, sandy clays, silty days

CH Inorganic days of high plastidty

Inferred geologic contact

1638 11 Groundwater elevation (per sample interval)

Total VOCs concentration in ug/L (less than MCLs) November 2009

5 Total VOCs concentration in pg/L (greater than MCLs) November 2009

Not detected above the laboratory reporting limit November 2009 1620 ^ 0 , B V ^ " s concentration in pg/L (less than MCLs) September 2011

5 (5) Total VOCs concentration in pg/L (greater than MCLs) September § 2011 Z ND Not detected above the laboratory reporting limit-September 2011

io 5Z Groundwater elevation al time of sampling September 2011 (at direct 2 push locations, uppermost representative static water measurement

used) 1®00 • Groundwater hydraulic gradient is southeast (out of plane)

The location and nature of contacts between widely-spaced wells may vary from that depicted

1580

Vertical Scale in Feet 0 20 40

0 200 400 1560 Horizontal Scale in Feet

Vertical Exaggeration 10:1

1540

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Figure 5 Cross Section A-A' Lindsay Manufacturing

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--

-

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—

-

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'

-

"

B Southwest

B' Northeast

1640 n

1620

1600

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Job No 33762801

1640

1620

1600

1580

1560

5

1540

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1500

1480

LEGEND

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Poorly-graded sands, gravelly sands, little or no fines

Clayey sands to silty sands

Inorganic sitts. silty or clayey fine sands, or clayey silts with slight plasticity

Inorganic days of low to medium plasticity, gravelly clays sandy days, silty days

Inorganic days of high plasticity

inferred geologic contact

Groundwater elevation (per sample interval)

Total VOCs concentration in pg/L (less than MCLs) October 2010

Total VOCs concentration in pg/L (greater than MCLs) -October 2010

Not detected above the laboratory reporting limit October 2010

Total VOCs concentration m pg/L (less than MCLs) September 2011

Total VOCs concentration in pg/L (greater than MCLs) September 2011

Not detected above the laboratory reporting limit September 2011

Groundwater elevation at time of sampling September 2011 (at direct push locations, uppermost representative static water measurement used)

Groundwater hydraulic gradient is southeast (out of plane)

The location and nature of contacts between widely-spaced wells may vary from that depicted

Vertical Scale in Feet 20 40

200 400 Horizontal Scale in Feet


'•»< HUH*4

Figure 6 Cross Section B-B' Lindsay Manufacturing

Lindsay, Nebraska

-

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' —

-

—

— - '

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-

.

c North

c South

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1621 75':

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7

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1619 55

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Job No 33762801

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i §

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Inorganic clays of low to medium plasticity, gravelly clays sandy clays silty clays

Inorganic clays of high plasticity

Inferred geologic contact

Groundwater elevation (per sample interval)

Total VOCs concentration in pg/L (less than MCLs) May 2010

Total VOCs concentration in pg/L (greater than MCLs) May 2010

Not detected above the laboratory reporting limit - May 2010

Total VOCs concentration in pg/L (less than MCLs) September 2011

Total VOCs concentration in pg/L (greater than MCLs) September 2011

Not detected above the laboratory reporting limit September 2011

Groundwater elevation at time of sampling September 2011 (at direct push locations, uppermost representative static water measurement used)

Groundwater hydraulic gradient is southeast (into plane)

The location and nature of contacts between widety-spaced wells may vary from that depicted

Vertical Scale in Feet 20 40

0 200 400 Approximate Horizontal Scale in Feet


m « «<n»

Figure 7 Cross Section C-C Lindsay Manufacturing

Lindsay, Nebraska

r

-

" —

— —

—

-

' - - ' " '

= ===

'

—-

- ) —

--

-—

--

'

Legend

Property Boundary

Proposed Soil Boring

Proposed Groundwater Sample Location

Vertical Profile (Multi-Depth) Soil Gas Sample Location

VOC VolatJteOnpanic

VOCs Above MCLs Plume Boundary * (Dashed where Inferred)

S Monitoring WeH ® Interceptor Well • Abandoned Well

Si

3

Figure 8 Source Areas and Sand Channel Location

Lindsay Manufactunng Lindsay, Nebraska

I

"

Concentration vs. Time Graph for MW06-11

Lindsay Manufacturing, Lindsay, Nebraska

10000

1000

B

S +c u c o

U

f us c

100

2/3/2001 6/18/2002 10/31/2003 3/14/2005 7/27/2006 12/9/2007 4/22/2009

Sample Date 9/4/2010 1/17/2012

1,1-DCE

1.1 DCA

1.2 DCE

1,2-DCA

1,1,1-TCA

TCE

PCE

Figure 10 (



-

-

-

m e o « S*^ S 4) U

c o

u c

10/25/2005 3/9/2007 7/21/2008 12/3/2009

Sample Date

4/17/2011 8/29/2012

1,1-DCE

1.1 DCA

1.2 DCE

1,2-DCA

1,1,1-TCA

TCE

PCE

Figure 11 ( sg j ) Sir



--

-

12/14/05 4/28/07 9/9/08 1/22/10

Sample Date 6/6/11 10/18/12

Figure 12 \^Z)

Concentration vs. Time Graph for MW06-02A


ATTACHMENTS

ATTACHMENT 1

SITE INSPECTION CHECKLIST

Site Inspection Checklist

Site name: Lindsay Manufacturing Company Date of inspection: November 8, 2012

Location and Region: Lindsay, Platte County, Nebraska/Region 7

EPA ID: NED068645696

Agency, office, or company leading the five-year review: U.S. EPA Region 7

Weather/temperature: Scattered Cloud Cover, with temperatures in the 50"s

I. SITE INFORMATION

Remedy Includes: (Check all that apply) • Landfill cover/containment S Access controls• Institutional controls £3 Groundwater pump and treatment • Surface water collection and treatment • Other:

• Monitored natural attenuation ^ Groundwater containment • Vertical barrier walls (groundwater cutoff wall)

Attachments: ^ Inspection team roster attached • Site map attached

II. INTERVIEWS (Check all that apply)

1. O & M Project ManagerName: Karen Mixon, URS Title: Senior Chemist

Interviewed: at site • at office • by phone Phone no. 206-438-2234 Problems, suggestions; • Report attached:

Date: 8 November 2012

2. O & M OperationsName: Bob Jacobson, Lindsay Manufacturing Title: Environmental Projects Manager Date: 8 November 2012

Interviewed: M at site • at office • by phone Phone no. 402-428-7388 Problems, suggestions; • Report attached:

Local regulatory authorities and response agencies (i.e., State and Tribal offices, emergency response office, police department, office of public health or environmental health, zoning office, recorder of deeds, or other city and county offices, etc.) Fill in all that apply.

Agency: Name: Title: Date:

Interviewed: • at site • at office by phone Phone no. ^ Problems; suggestions; • Report attached:

Other interviews

Representing: U.S. Environmental Project Agency, Region 7

Name: Title: Date: Interviewed: at site • at office D by phone Phone no.

Problems; suggestions; • Report attached:

Site Inspection Checklist Page 1 of 14

'

III. ON-SITE DOCUMENTS & RECORDS VERIFIED (Check all that apply)

1. O&M Documents E O&M manual B Readily available B Up to date • N/A • As-built drawings • Readily available • Up to date ^ N/A S Maintenance logs ^ Readily available ^ Up to date • N/A Remarks

2 Site-Specific Health and Safety Plan H Readily available • Up to date • Contingency plan/emergency response plan • Readily available • Up to date Remarks

• N/A N/A

3. O & M and OSHA Training Records ^ Readily available • Up to date Remarks

• N/A

4. Permits and Service Agreements S Air discharge permit ^ Readily available S Up to date • N/A K Effluent discharge Readily available H Up to date • N/A • Waste disposal, POTW • Readily available • Up to date Kl N/A • Other permits • Readily available • Up to date • N/A Remarks Air discharge permit related to manufacturing and is not related to environmental remediation.

5. Gas Generation Records • Readily available • Up to date S N/A Remarks

6. Settlement Monument Records • Readily available • Up to date Remarks

N/A

• 7. Groundwater Monitoring Records ^ Readily available Up to date

Remarks • N/A

8. Leachate Extraction Records D Readily available • Up to date Remarks

H N/A

9. Discharge Compliance Records • Air • Readily available • Up to date H ' N / A K Water (effluent) ^ Readily available M Up to date • N/A Remarks

10. Daily Access/Security Logs ^ Readily available M Up to date Remarks All non-Lindsay personnel are required to sign in at front desk.

• N/A


IV. O&M COSTS

1. O&M Organization • State in-house • Contractor for State EI PRP in-house El Contractor for PRP n Federal Facility in-house O Contractor for Federal Facility • Other:

O&M Cost Records • Readily available D Up to date • Funding mechanism/agreement in place

Original O&M cost estimate: • Breakdown attached

O&M cost records were requested, but were not supplied.

O&M Cost Records • Readily available • Up to date • Funding mechanism/agreement in place Original O&M cost estimate • Breakdown attached

O&M cost records were requested, but were not supplied.

3. Unanticipated or Unusually High O&M Costs During Review Period Describe costs and reasons: None.

V. ACCESS AND INSTITUTIONAL CONTROLS El Applicable • N/A

A. Fencing

1. Fencing damaged • Location shown on site map El Gates secured Remarks

• N/A

B. Other Access Restrictions

1. Signs and other security measures • Location shown on site map • N/A Remarks: All offsite extraction wells are in locked well houses. On-site facility is access controlled and surrounded by a security fence.


C. Institutional Controls (ICs)

1. Implementation and enforcement Site conditions imply ICs not properly implemented • Yes • No El N/A Site conditions imply ICs not being fully enforced • Yes • No E) N/A

Type of monitoring (e.g., self-reporting, drive by): Frequency: Responsible party/agency: Contact:

Name Title Date Phone no.

Reporting is up-to-date • Yes • No El N/A Reports are verified by the lead agency • Yes • No El N/A

Specific requirements in deed or decision documents have been met • Yes • No El N/A Violations have been reported • Yes • No El N/A Other problems or suggestions: D Report attached

Adequacy • ICs are adequate • ICs are inadequate El N/A Remarks

D. General

1. Vandalism/trespassing • Location shown on site map El No vandalism evident Remarks

2. Land use changes on site • N/A Remarks No on-site land use changes since last FYR

3. Land use changes off site • N/A Remarks No off-site land use changes since last FYR

VI. G E N E R A L SITE CONDITIONS

A. Roads El Applicable • N/A

1. Roads damaged • Location shown on site map El Roads adequate • N/A Remarks No access roads are present for offsite extraction wells G127000 and EXT07-02 because they are located in agricultural fields. Construction of dedicated access roads is not considered feasible because of property rights that would have to be obtained from land owners.


B. Other Site Conditions

Remarks

VII. C H E M I C A L FILL C O V E R • Applicable El N/A

A. Landfill Surface

1. Settlement (Low spots) • Location shown on site map • Settlement not evident Areal extent Depth Remarks:

Cracks D Location shown on site map • Cracking not evident Lengths Widths Depths Remarks

3. Erosion D Area shown in Photo 10 (Attachment 2) • Erosion not evident Areal extent Depth Remarks:

4. Holes D Location shown on site map • Holes not evident Areal extent: Depth: Remarks:

5. Vegetative Cover D Grass D Cover properly established D No signs of stress Trees/Shrubs (indicate size and locations on a diagram) Remarks:

6. Alternative Cover (armored rock, concrete, etc.) • N/A Remarks:

7. Bulges O Location shown on site map • Bulges not evident Areal extent Height Remarks

8. Wet Areas/Water Damage • Wet areas/water damage not evident D Wet areas D Location shown on site map Areal extent • Ponding D Location shown on site map Areal extent D Seeps • Location shown on site map Areal extent D Soft subgrade D Location shown on site map Areal extent Remarks:

9. Slope Instability • Slides • Location shown on site map Q No evidence of slope instability Areal.extent Remarks:

B. Benches • Applicable El N/A

1. Flow Bypass Bench • Location shown on site maD \~\ N/A or okav Remarks:


~

'

2. Bench Breached Remarks

• Location shown on site map • N/A or okay

3. Bench Overtopped Remarks

O Location shown on site map • N/A or okay

C. Letdown Channels • Applicable El N/A

1. Settlement Areal extent Remarks

• Location shown on site map Depth

• No evidence of settlement

2. Material Degradation Material type

O Location shown on site map Areal extent

• No evidence of degradation

Remarks

3. Erosion Areal extent Remarks

D Location shown on site map Depth

• No evidence of erosion


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4. Undercutting f j Location shown on site map CD No evidence of undercutting Areal extent 1 Depth Remarks

5. Obstructions Type • No obstructions • Location shown on site map Areal extent Size Remarks

6. Excessive Vegetative Growth Type Q No evidence of excessive growth D Vegetation in channels does not obstruct flow Q Location shown on site map Areal extent Remarks

D. Cover Penetrations • Applicable El N/A

1. Gas Vents • Active • Passive D Properly secured/locked • Functioning D Routinely sampled • Evidence of leakage at penetration • Needs Maintenance • N/A Remarks

• Good condition

2. Gas Monitoring Probes • Properly secured/locked , • Functioning • Routinely sampled D Evidence of leakage at penetration D Needs Maintenance • N/A Remarks

• Good condition

3. , Monitoring Wells (within surface area of landfill) • Properly secured/locked D Functioning D Routinely sampled • Good condition • Evidence of leakage at penetration • Needs Maintenance • N/A Remarks: Monitoring well GW-05 is the only monitoring well within the surface area of the landfill/penetrates the landfill cap.

4. Leachate Extraction Wells • Properly secured/locked • Functioning D Routinely sampled • Evidence of leakage at penetration • Needs Maintenance • N/A Remarks

D Good condition

5. Settlement Monuments • Located • Routinely surveyed Remarks

• N/A


E. Gas Collection and Treatment • Applicable E l N/A

1.

r

; Gas Treatment Facilities • Flaring • Thermal destruction • Collection for reuse D Good condition • Needs Maintenance Remarks

2. Gas Collection Wells, Manifolds and Piping • Good condition • Needs Maintenance Remarks

V

3. Gas Moni tor ing Facilities (e.g., gas monitoring of adjacent homes or buildings) • Good condition • Needs Maintenance • N/A Remarks i

F. Cover Drainage Layer • Applicable E l N/A

1. Outlet Pipes Inspected • Functioning • N/A Remarks

2. Outlet Rock Inspected • Functioning • N/A Remarks

G. Detention/Sedimentation Ponds • Applicable E l N/A

1. Siltation Areal extent Depth • N/A • Siltation not evident Remarks

2. Erosion Areal extent Depth • Erosion not evident Remarks

3. Outlet Works • Functioning • N/A Remarks

4. Dam • Functioning • N/A Remarks

i

Site Inspection Checklist PageS of 14

'

H Retaining Walls • Applicable El N/A

1. Deformations Q Location shown on site map • Deformation not evident Horizontal displacement Vertical displacement Rotational displacement Remarks

2 Degradation D Location shown on site map • Degradation not evident Remarks

I. Perimeter Ditches/Off-Site Discharge • Applicable El N/A

1. Siltation Q Location shown on site map • Siltation not evident Areal extent Depth Remarks

2 Vegetative Growth • Location shown on site map • N/A • Vegetation does not impede flow Areal extent Type Remarks

3. Erosion • Location shown on site map • Erosion not evident Areal extent Depth Remarks

4. Discharge Structure • Functioning • N/A Remarks:

VIII. V E R T I C A L BARRIER W A L L S • Applicable El N/A

1. Settlement • Location shown on site map D Settlement not evident Areal extent Depth Remarks

Performance Monitoring • Performance not monitored Frequency • Evidence of breaching Head differential Remarks


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IX. GROUND WATER/SURFACE W A T E R REMEDIES EI Applicable • N/A

A. Groundwater Extraction Wells, Pumps, and Pipelines El Applicable • N/A

1. Pumps, Wellhead Plumbing, and Electrical El Good condition El All required wells properly operating • Needs Maintenance • N/A Remarks On-site extraction wells AOIW and MW89-12 were not operating because of cold weather. All off-site extraction wells were operating and in good condition.

2. Extraction System Pipelines, Valves, Valve Boxes, and Other Appurtenances El Good condition • Needs Maintenance • Remarks

3. Spare Parts and Equipment El Readily available EI Good condition D Requires upgrade • Needs to be provided Remarks Spare parts are ordered as needed from vendors.

B. Surface Water Collection Structures, Pumps, and Pipelines • Applicable El N/A

1. Collection Structures, Pumps, and Electrical • Good condition • Needs Maintenance D N/A Remarks

2 Surface Water Collection System Pipelines, Valves, Valve Boxes, and Other Appurtenances • Good condition • Needs Maintenance Remarks

3. Spare Parts and Equipment • Readily available • Good condition • Requires upgrade • Needs to be provided Remarks

C. Treatment System El Applicable • N/A

1. Treatment Train (Check components that apply) • Metals removal • Oil/water separation • Bioremediation • Air stripping • Carbon adsorbers • Filters • Additive El Others_Groundwater extracted on-site is surface discharged through a center pivot irrigation system. Groundwater extracted off-site is discharged through a center pivot irrigation system or directly to Shell Creek. El Good condition D Needs Maintenance • Sampling ports properly marked and functional • Sampling/maintenance log displayed and up to date El Equipment properly identified CD Quantity of groundwater treated annually: • Quantity of surface water treated annually: Remarks Sampling ports on extraction wells were not labeled, but were clearly discernible on extraction well piping.


2 Electrical Enclosures and Panels (properly rated and functional) • N/A El Good condition • Needs Maintenance Remarks Supplemental cooling (i.e. fans) was being used in off-site well houses to prevent overheating of aboveground extraction pump motors.

3. Tanks, Vaults, Storage Vessels El N/A • Good condition • Proper secondary containment • Needs Maintenance Remarks

4. Discharge Structure and Appurtenances • N/A El Good condition • Needs Maintenance Remarks All off-site discharge locations to Shell Creek were unlined and did not employ any kind of energy dissipation technologies to prevent erosion. However, no significant erosion was discernible at off-site discharge locations. Aeration pond associated with G127000 had recently been dredged to remove accumulated sediment.

5. Treatment Building(s) • N/A El Good condition (esp. roof and doorways) • Needs repair • Chemicals and equipment properly stored Remarks No chemical storage at any of the extraction well houses.

6. Monitoring Wells (pump and treatment remedy) El Properly secured/locked El Functioning El Routinely sampled El Good condition • All required wells located • Needs Maintenance • N/A Remarks:

D. Monitoring Data

1. Monitoring Data E) Is routinely submitted on time El Is of acceptable quality

2 Monitoring data suggests: El Groundwater plume is effectively contained El Contaminant concentrations are declining

E. Monitored Natural Attenuation

1. Monitoring Wells (natural attenuation remedy) • Properly secured/locked • Functioning • Routinely sampled • Good condition • All required wells located • Needs Maintenance El.N/A Remarks

X. OTHER REMEDIES

If there are remedies applied at the site which are not covered above, attach an inspection sheet describing the physical nature and condition of any facility associated with the remedy. An example would be soil vapor extraction.


'

XI. OVERALL OBSERVATIONS

A. Implementation of the Remedy

Describe issues and observations relating to whether the remedy is effective and functioning as designed. Begin with a brief statement of what the remedy is to accomplish (i.e., to contain contaminant plume, minimize infiltration and gas emission, etc.).

The intent of the remedy it to prevent further migration of the offsite VOC plume. The offsite plume has been contained with the installation of additional offsite extraction wells. The designed remedy is operating as intended and should prevent further plume growth. Though offsite migration of contamination is continuing, the offsite plume is contained and the existing remedy is protective:

B. Adequacy of O&M

Describe issues and observations related to the implementation and scope of O&M procedures. In particular, discuss their relationship to the current and long-term protectiveness of the remedy.

The O&M being performed is considered appropriate for maintaining the operability of the on-site and off-site extraction wells. All monitoring and extraction wells, including pumps and motors, appear to be well maintained and are in good working order. Lindsay Manufacturing appears to be taking a proactive approach, such as mucking out the aeration pond associated with G127000, to ensure minimal downtime for all extraction wells. High uptime for extraction well pumps and motors ensures groundwater plume containment, and therefore, ensures protectiveness. Current O&M procedures should ensure a high uptime for extraction well pumps and motors and associated discharge facilities.


C. Early Indicators of Potential Remedy Problem

Describe issues and observations such as unexpected changes in the cost or scope of O&M or a high frequency of unscheduled repairs, which suggest that the protectiveness of the remedy may be compromised in the future.

There has been an increase in O&M costs since the last five-year review period (2003 to 2008) associated with the additional wells that have been installed. However, the cost of the associated O&M is not considered unexpected or excessive given the amount of work that has been done in the last five years. Current O&M costs are not indicative of problems that could compromise the long term protectiveness of the remedy.

D. Opportunities for Optimization

Describe possible opportunities for optimization in monitoring tasks or the operation of the remedy.

Year round operation of extraction wells MW89-12 and AOIW is currently limited to warm weather months and the inability to discharge the extracted groundwater without treatment to nearby streams because of elevated zinc levels. If these wells were operated on a year around basis, the offsite flux of contamination would likely be negligible and the off-site downgradient plume would likely reach clean up levels within 5 to 10 years allowing shutdown of the off-site extraction wells.

Source removal in the Cell Area may also reduce the source of metal contamination present in groundwater and allow eventual year round operation of onsite extraction wells MW89-12 and AOIW.


Site Inspection Team Roster

Personnel Representing Phone Number


ATTACHMENT 2

PHOTOGRAPHS DOCUMENTING SITE CONDITIONS

Photo 1 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Cell Area, looking south. This area was originally the location of an earthen disposal pit that received a spent-acid waste stream from the galvanizing process. The disposal pit was replaced in 1983 with the above pictured cells. The unlined cells were part of a wastewater treatment system designed to neutralize the spent acid.

Photo 2 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Reaction Pit, looking southeast. This feature was part of the wastewater treatment system associated with the Cell Area and is located on the north side of the

Galvanizing Building.

Photo 3 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Interceptor well MW89-12, looking west. This interceptor well is located adjacent to the main assembly building and is operated on a seasonal basis.

Photo 4 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Monitoring well 87-3 is pictured in the foreground. Interceptor Well AOIW is visible in the background. This interceptor well operates on a seasonal basis and is located in the southeast corner of the facility.

Photo 5 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Center pivot number 8 is pictured, looking east. The pictured center pivot system is one of the irrigation systems used to discharge the groundwater extracted by the off-facility interceptor wells.

Photo 6 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Well house for Interceptor Well G127000, looking west.

Photo 7 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Interceptor well G127000, looking north. Water extracted from G127000 is either discharged by a center pivot irrigation system or discharged to Shell Creek.

Photo 8 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Pictured is the aeration pond for Interceptor Well G127000. Water enters the pond at the far end of the pond and is discharged to Shell Creek via an outlet located at the end of the pond closest to the camera. Photo was taken looking north.

Photo 9 Date: November 8. 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Pictured is the Shell Creek discharge for Interceptor Well G127000. Prior to discharge to Shell Creek, the extracted groundwater passes through a small aeration basin. Photo was taken looking west.

Photo 10 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Pictured above is the well house for Interceptor Well EXT07-02. Photo looking northwest.

Photo 11 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Pictured above is the pipe that conveys extracted groundwater from Interceptor Well EXT07-02 to the Shell Creek discharge. Some water leakage was occurring near the pipe joints, which is highlighted by the corroded areas visible in the above photo.

Photo 12 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Interior of the well house for Interceptor Well EXT07-02.

Photo 13 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Discharge to Shell Creek for Interceptor Well EXT07-02. The discharge location is unlined with concrete or other energy dissipating structures. Photo looking west.

Photo 14 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Well house for Interceptor Well EXT11-01, the southern most interceptor well. The well house is elevated because of the potential for flooding from adjacent Shell Creek. Photo looking west.

mmm•. Hill ^ ^ H H B H B H I ^ ^ H I H B I H Photo 15 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Interior of the well house for Interceptor Well EXT11-01, the southern most interceptor well.

Photo 16 Date: November 8, 2012 Location: Lindsay Manufacturing Company, Lindsay, Nebraska Description: Interceptor Well EXT11-01 discharge to Shell Creek. Looking South.

ATTACHMENT 3

LIST OF DOCUMENTS REVIEWED

List of Documents Reviewed

Lindsay Manufacturing Co., 2013. Request for Authorization to Discharge Groundwater , from the Lindsay National Priorities List (NPL) site to Shell Creek, April.

Lindsay Manufacturing, Co., 2011. Request for Authorization to Discharge Groundwater from the Lindsay National Priorities List (NPL) site to Shell Creek, August.

United State District Court for the District of Nebraska, 1992. United States of America, Plaintiff, vs. Lindsay Manufacturing Co, Defendant, Consent Decree, April.

United States Environmental Protection Agency, 2008. Third Five-Year Report, Lindsay Manufacturing Co. Site, Lindsay, Platte County, Nebraska, September.

United States Environmental Protection Agency, 2003. Five-Year Review Report, Second Five-Year Review Report for Lindsay Manufacturing Superfund Site, Lindsay, Nebraska, July.

United States Environmental Protection Agency, 1990. Record of Decision, Lindsay Manufacturing Company, Lindsay, Nebraska, September.

URS, 2012. Data Transmittal Addendum Task 6 (Phase V): Pump Test and Assessment of the Effectiveness of the Capture Zone Created by Interceptor Well EXT11-01, Completed at Lindsay Manufacturing Company, August.

URS, 2012. Enhanced Groundwater Remediation Progress Report, October 1, 2011 through March 31, 2012, April.

URS, 2012. Letter Work Plan Addendum: Task 3A Chromium Soil Sampling in Cells 1 and 2, Lindsay Manufacturing, L L C , February.

URS, 2012. Interim Data Transmittal Addendum Task 6 (Phase V) Field Activities: Installation of Additional Monitoring and Interceptor Wells in the Southern Terminus, Lindsay Manufacturing, L L C , January.

URS, 2011. Enhanced Groundwater Remediation Progress Report, April 1, 2011 through September 30, 2011, November.

URS, 2011. Revision 1.0 Enhanced Groundwater Remediation Progress Report, April ' 1, 2010 through September 30, 2010, May.

URS, 2011. Letter Work Plan Addendum: Task 6 (Phase V) Installation of Additional Monitoring and Interceptor Wells in the Southern Terminus, Lindsay Manufacturing, LLC, May.


URS, 2011. Report and Data Transmittal Onsite Assessments (Phase II) Revision 1.0: Task L: Assess the Potential Presence of Other Source Areas On-Facility and Task 2: Assess the Lateral and Vertical Extent of Chlorinated VOCs in the Cell and Reaction Pit Areas, April.

URS, 2011. Revision 1.0, Interim Data Transmittal Addendum Task 6 (Phase II): Pump Test Assessment of the Effectiveness of the Capture Zones Created by Interceptor Wells G127000 and EXT07-02 Completed at Lindsay Manufacturing, LLC, March.

URS, 2011. 2008 Five-Year Review Work Plan Task 5 Update, January.

URS, 2010. Analytical Data Package Task 6 Supplemental Investigation (Phase IV) Field Activities Completed at Lindsay Manufacturing, LLC, November.

URS, 2010. Enhanced Groundwater Remediation Progress Report, April 1, 2010 through September 30, 2010, November.

URS, 2010. Letter Work Plan Addendum: Task 6 Supplemental Investigation (Phase IV) Lindsay Manufacturing, LLC, September.

URS, 2010. Interim Data Transmittal Addendum Task 6 Supplemental Investigation (Phase III) Field Activities Completed at Lindsay Manufacturing, LLC, September.

URS, 2010. Interim Data Transmittal Addendum Task 6 (Phase II) Follow-up Field Activities: Assess the Effectiveness of the Capture Zones Created by Operation of Wells G127000 and EXT07-02, Completed at Lindsay'Manufacturing, LLC, July.

URS, 2010. Letter Work Plan Addendum: Task 1 and 2 Follow-up (Phase II) Field Activities at Lindsay Manufacturing, LLC, July.

URS, 2010. Letter Work Plan Addendum: Task 6 Supplemental Investigation (Phase III), July.

URS, 2010. Letter Work Plan Addendum: Task 6 Follow-up Field Activities, April.


URS, 2010. Report and Data Transmittal Onsite Assessments, Task 1: Assess the Potential and Presence of Other Source Areas On-Facility and Task 2; Assess the

1

—

Lateral and Vertical Extent of Chlorinated VOCs in the Cell and Reaction Pit Areas Completed at Lindsay Manufacturing, LLC, February.

URS, 2009. Interim Data Transmittal Tasks 4 and 6 from 2008 Five-Year Review Work Plan dated August 14, 2009for Lindsay Manufacturing, LLC, December.

URS, 2009. Interim Data Transmittal, Task 6: Assess the Effectiveness of the Capture Zones Created by Operation of Wells G127000 and EXT07-02, December.

URS, 2009. Biannual Report, Enhanced Groundwater Remediation Progress Report, October.

URS, 2009. Work Plan Revision 1.0, Actions Responsive to 2008 Five-Year Review, Lindsay Manufacturing, LLC, Lindsay, Nebraska, August.

?

ATTACHMENT 4

HISTORICAL DATA


/

Tabic 4

Summary of Analy t ica l Results for Moni tor ing and Interceptor Wel ls

L indsay Manufac tu r ing , L L C

L indsay, Nebraska

Specific Organic Analyses (ug/L) Inorganic Analyses (mg/L)

Water Conductivity pH pH TSS (mg/L) Temperature (umho/em) Total Volatile

Well Identification Date Collected (Held) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organ ics 1,4-Dioxane Cadmium Cbromiuni Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 . 5 200 5 5 NE 0.005 0.05 0.3d 0.05 5.0d 250d

Alternate Cleanup Level 8 On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE ^ NE 500

Alternate Cleanup Level* • Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

On-Facility Wells MWS7-3 11/01 6.35 6.6 J NA 11.5 949 19 5.0 U 5.0 U 5.0 U 30 5.0 U 5.0 54 NA 0.002 U 0.009 0.08 0.001 U 0.219 34

2/02 6.60 6.7 J NA 12.2 766 22 5.0 U 5.0 U 5.0 U 30 5.0 U 6.0 58 NA 0.002 U 0.012 0.11 0.001 U 0.136 25 5/02 6.61 6.7 J NA 10.4 785 14 5.0 U 5.0 U 5.0 U 22 5.0 U 5.0 41 NA 0.002 U 0.012 J 0.11 0.001 U 0.107 25 8/02 6.44 6.79 J NA 13.2 722 12 J 5.0 UJ 5.0 UJ 5.0 UJ 13 J 5.0 UJ 5.0 UJ 25 NA 0.002 U 0.013 0.62 0.001 U 1.22 34 11/02 6.58 6.78 NA 11.6 920 17 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 8.0 25 • NA 0.002 U 0.012 0.21 0.001 U 0.349 31 2/03 6.59 6.85 NA 12.4 982 27 5.0 U 5.0 U 5.0 U 29 5.0 U 8.0 64 NA 0.002 U 0.008 0.06 0.001 u 0.259 32 5/03 6 47 6.76 1 NA 12.1 774 23 5.0 U 5.0 U 5.0 U -•'24 5.0 U 11 58 NA 0.002 U 0.009 0.19 0.001 u 0.155 26 8/03 (diffusion bag) NA NA NA NA NA 22 6.2 1.0 U 1.0 U 17 1.0 U 4.4 50 NA NA NA NA NA NA NA 8/03 6.44 6.66 J NA 14.0 • 654 9.3 2.5 1.0U 1.0 U 14 1.0 U 7.0 33 NA 0.002 U 0.008 0.33 0.001 U 0.947 47 11/03 6.52 6.81 J NA 11.9 809 16 1.5 1.0 U 1.0 U 14 I.0U 10 42 NA 0.002 U 0.008 0.07 0.002 0.418 55 2/04 5.75 6.68 J NA II.1 854 20 2 2 1.0U 1.0 U 18 1.0 U 8.5 49 NA 0.002 U 0.010 0.14 0.001 U 0.306 J 40 5/04 6.50 6.85 J NA 13.2 999 26 2.6 1.0 U • 1.0 U 24 1.0 U 8.5 61 NA 0.002 U 0.007 0.24 0.001 u 0.272 34.8 8/04 6.82 6.59 NA 15.4 1,001 370 60 6.9 5.0 U. 200 5.2 400 1,042 NA 0.002 U 0.006 0.63 0.001 u 0.584 63.3 11/08/04 6.87 6.83 J NA 11.4 1,044 930 90 10 I0U 300 I0U 520 1,850 NA 0.002 U O.005 0.12 0.001 u 0.231 113 02/21/05 686 6.84 J NA 11.6 638 13 1.0 0.2 0.2 U 6.9 0.2 U II 32 4.9 J 0.002 U 0.008 0.15 0.001 u 0.158 45.2 02/21/05 (DUP) 6.86 6.85 NA 11.6 638 14 1.2 0.3 0.2 U 7.9 0.2 U 13 36 5.3 0.002 U 0.011 0.16 0.001 u 0.143 43.0 05/02/05 6.79 6.85 1 NA 11.7 795 21 2.3 1.0 U 1.0 U 51 1.0 U 47 121 II 0.002 U 0.008 0.13 0.001 u 0.188 79.3 05/2/05 (DUP) 6.79 6.94 J NA 11.7 795 20 2.4 1.0 U 1.0 U 51 I.0U 48 121 11 0.002 U 0.01 0.15 0.001 u 0.202 78.5 08/03/05 6.83 6.97 NA 14.3 1,033 130 45 13 5.0 U 48 7.4 620 863 120 0.002 U 0.007 0.65 0.001 u 0.328 38.6 08/3/05 (DUP) 6.83 7.05 NA 14.3 1,033 130 46 13 5.0 U 50 7.2 620 866 140 0.002 U 0.007 0.75 0.001 u 0.343 38.5 11/08/05 6.80 7.06 NA 11.9 910 58 25 4.9 3.0 U 20 3.8 320 432 120 J 0.002 U 0.006 0.10 0.001 u 0.146 37.0 11/8/05 (DUP) 6.80 7.02 NA 11.9 910 52 24 4.3 3.0 U 18 3.7 290 392 120 J 0.002 U 0.005 U 0.09 0.001 I 0.132 37.0 01/31/06 6.68 6.78 NA 11.2 718 24 5.1 1.3 1.0 U 23 1.0 U 49 102 14 0.002 U O.008 0.10 0.001 0.172 82.6 01/31/06 (DUP) 6.68 6.75 NA 11.2 718 20 4.7 1.2 1.0 U 19 1.0U 42 87 12 0.002 U 0.009 0.10 0.001 u 0.171 83.2 05/09/06 6.69 6.82 NA 14.1 926 340 69 10 I0U 210 I0U S40 1,169 no 0.002 U 0.006 0.14 0.001 u 0.365 123 05/09/06 (DUP) 6.69 NA NA 14.1 926 420 80 12 10 U 260 I0U 590 1,362 NA NA NA NA NA NA NA 08/20/06 6.80 6.97 J NA 15.0 815 15 11 0.8 0.2 U 5.6 1.0 38 71 24 0.002 U 0.013 0.53 .0.001 u 0.170 121 11/07/06 6.75 6.82 J NA 13.6 758 / 270 49 9.9 1.5 U 74 7.4 570 980 89 0.002 U 0.005 U 0.13 0.001 u 0.197 80.6 • 02/11/07 6.88 6.89 1 NA 11.9 853 13J 2.6 J 1.0 U 1.2 J 10 J 1.0 U 21J 48 7.2 0.002 U 0.01 0.11 0.001 u 0.181 117 05/01/07 6.64 6.75 J NA 14.0 959 330 62 12 0.6 U 170 11 400 985 93 0.002 U 0.011 0.21 0.001 u 0.35 120 , 08/13/07 6.83 6.88 J NA 14.1 946 81 24 3.0 U 3.0 U 16 3.0 U 190 311 74 J 0.002 U 0.005 U 0.27 o.ooi.u 0.22 38 10/29/07 6.58 6.56 J NA 12.4 851 370 55 9.2 0.2 U 94 8.4 490 1.027 100 0.002 U 0.008 0.07 0.001 u 0.21 145 02/07/08 6.75 6.93 NA 1 1.8 825 23 3.3 1.0 0.6 U 14 0.6 U 32 73 4.8 0.002 U 0.009 0.10 0.001 u 0.12 J+ 96.3 05/15/08 6.64 6.97 J NA 12.6 644 7.2 0.7 0.2 U 0.2 U 2.6 0.2 U 5.7 16 4.0 0.002 U 0.009 0.12 0.001 u 0.11 J+ 51.5 08/06/08 6.70 6.74 NA 13.6 1,143 670 78 12.2 0.7 190 11 700 1,662 85 0.002 U 0.007 0.18 0.001 u 0.39 119 11/17/08 6.77 6.73 J NA 11.8 883 29 3.1 0.6 0.2 U 15 0.5 41 89 8.5 0.002 U 0.010 0.13 0.001 u 0.12 77.0 02/17/09 7.59 6.77 NA 12.0 697 8.1 1.0 0.2 U 0.2 U 2.4 0.2 U 6.8 18 9.7 0.002 U 0.013 0.12 0.001 u 0.08 39.2 05/06/09 6.80 6.64 NA 12.9 886 13 0.8 0.2 0.2 U 5.9 0.2 U 8.0 28 12 0.002 U 0.009 0.31 0.001 u 0.15 49.9 07/28/10 6.77 NA NA 14.2 988 100 8.7 3.0 0.4 200 1.9 520 834 30 0.002 U 0.009 0.13 0.001 u 0.12 57.3 07/28/10 (DUP) 6.77 NA NA 14.2 988 110 8.5 3.0 0.4 210 1.9 540 874 35 0.002 U 0.009 0.15 0.001 u 0.11 59.9 11/02/10 6.74 NA NA 13.1 665 34 4.2 1.0 0.2 U 40 0.8 120 200 13 0.002 U 0.012 0.65 0.001 u 0.16 50.5 02/13/11 6.80 NA NA 12.5 574 14 0.8 0.2 U 0.2 U 4.6 0.2 U 14 33 5.2 0.002 U 0.014 1.88 0.001 u 0.46 30.3

(82 reel BTOC) 05/24/11 6.21 NA I.I U 14.0 983 14 1.2 0.2 U 0 2 U 3.4 0.2 U 6.6 25 11 0.002 U 0.007 0.05 U 0.0001 u 0.01 26 05/24/11 6.21 NA 1.1 U 14.0 983 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.007(D) 0.05 U (D) 0.0001 U(D) 0.01 (D) NA 08/01/11 6.67 NA 1.1 U 17.3 1,320 91 9.0 1.9 0.3 96 1.5 240 440 37 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U 49 08/01/11 6.67 NA NA 17.3 1,320 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.01 U(D) NA

(101 feet BTOC) 05/24/11 6.45 NA 1.1 U 14.0 954 II 1.0 0.2 U 0.2 U 3.0 0.2 U 5.9 21 8.6 0.002 U 0.007 0.06 0.0001 u 0.03 25 05/24/11 6.45 NA I.I U 14.0 954 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.007 (D) 0.05 U (D) 0.0001 U(D) 0.02 (D) NA 08/01/11 6.61 NA 1.0 U 18.4 1,140 62 7.0 1.7 0.2 70 1.2 190 332 24 0.002 U 0.005 U 0.05 U 0.0001 u 0.15 57 08/01/11 6.61 • NA NA 18.4 1,140 NA NA NA • NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.15(D) NA

(119 feet BTOC) 05/24/11 6.43 NA 2.7 14.0 1,040 14 1.2 0.2 U 0.2 U 3.8 0.2 U 7.5 27 12 0.002 U 0.008 0.24 0.0001 0.12 27 05/24/11 6.43 NA 2.7 14.0 1.040 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.007 (D) 0.05 U (D) 0.0001 U(D) 0.05 (D) NA 08/01/11 6.32 NA 1.1 U 17.4 1.220 69 7.6 1.7 0.3 79 1.3 200 359 27 0.002 U 0.005 U 0.05 U 0.0001 u 0.11 56 08/01/11 6.32 NA NA 17.4 1,220 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 0.11 (D) NA 10/31/11 6.37 NA NA 13.3 699 15 2.0 0.3 0.2 U 12 0.2 U 31 60 15 0.002 U 0.006 0.05 U 0.0001 U 0.05 39.3 02/01/12 NA NA NA NA NA 12 16 0.3 0.2 U 8.9 0.3 38 61 NA NA NA NA NA NA • NA

K:WSVLrNDSM"\201 2\9 DctrvtnblcA9. Fmi Ri^unnApn BumioATiblrATaUe 4-Niouiorcof Wclu (Moutorm wclb4/12/3012 Page 1 of 22 URS Corporation

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Table 4

Summary of Analy t ica l Results for Mon i to r ing and Interceptor Wel ls


L indsay, Nebraska

Specific Organic Analyses (u Inorganic Analyses (mg/L)Water Conductivity

pH pH TSS (mg/L) Temperature (umbo/cra) Total Volatile Well Identification Date Collected (field) (lab) (lab) CC) (Held) (field) 1,1-DCE 1,1-DCA M - D C E U - D C A 1,1,1-TCA TCE PCE Organics 1,4-Dioxaae Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0d 250

Alternate Cleanup Level * On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level 1 Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400 MWS9-12 1 1/01 6.47 NA NA 13.1 920 54 29 6.0 5.0 U 120 . 5.0 U 170 379 NA NA NA NA NA NA NA

2/02 6.43 NA NA 11.0 974 24 5.0 U 5.0 U 5.0 U 23 5.0 U 70 117 NA. NA NA NA NA NA NA 3/02 6.35 NA NA 14.0 967 44 16 5.0 U 5.0 U 70 5.0 U 150 280 NA NA NA NA NA NA NA

• 5/02 6.67 NA NA 12.2 1,090 18 5.0 U 5.0 U 5.0 U 10 5.0 U 32 60 NA NA NA NA NA NA NA 6/02 6.83 NA NA 13.5 949 19 J 5.0 UJ 5.0 UJ 5.0 UJ II J 5.0 UJ 28 J . 58 NA NA NA NA NA NA NA 8/02 6.25 NA NA 14.6 820 78 J 46 J 5.0 UJ 5.0 UJ 84 J 5.0 UJ 260 J 468 NA -NA NA 0.05 U NA 1.66 299 11/02 6.37 NA NA 12.9 1,172 74 33 7.0 5.0 U 110 5.0 U 280 504 NA NA NA 0.07 NA 1.96 NA 2/03 5.70 NA NA 11.5 1,270 42 15 5.0 U 5.0 U 67 5.0 400 529 NA NA NA NA NA NA NA 5/03 6.39 6.66 J NA 12.5 960 50 15 5.0 U 5.0 U 45 5.0 U 180 290 NA 0.002 U 0.005 U 0.05 U 0.001 U 1.16 290 8/03 6.05 NA NA 14.7 1,252 95 74 23 1.0 U 170 8.0 340 710 NA NA NA NA NA NA NA 11/03 6.12 6.37 J NA 13.5 1,218 90 57 19 5.0 U 170 5.0 U 190 526 NA 0.002 U 0.005 U 0.05 U 0.001 3.33 370 2/04 . 6.09 NA NA 13.3 1,150 50 17 6.1 1.0U 66 3.4 220 J 363 NA NA NA NA NA NA NA 5/04 6.17 NA NA 12.9 1,132 80 38 11 2.0 U 96 4.7 290 J 520 NA NA NA NA NA NA NA 8/04 6.23 6.32 NA 13.2 1,366 85 87 29 2.0 U 150 10 350 711 42 0.002 U 0.005 U 0.05 U 0.001 U 3.31 22.5 11/09/04 6.32 6.36 J NA 12.9 1,155 60 60 23 5.0 U 86 7.2 240 476 27 J 0.002 U 0.005 U 0.05 U 0.001 U 4.19 278 02/20/05 6.42 NA NA 14.2 1,148 39 28 IS 5.0 U 78 6.6 370 .537 26 NA NA NA NA NA NA 05/02/05 6.65 6.58 J NA 12.3 1,117 34 38 17 1.0U 89 5 170 353 36 0.002 U 0.005 U 0.1 0.001 9.46 417 07/31/05 6:37 6.49 J NA 13.4 1,193 42 54 19 3.0 U 57 7.0 190 369 33 0.002 U 0.006 0.05 U 0.001 U 9.53 236 11/06/05 6.45 6.56 J NA 12.7 .799 35 46 16 2.0 U 45 17 420 579 41 J 0.002 U O.005 U 0.1 0.001 U 7.82 104 01/29/06 6.46 NA NA 13.6 750 25 30 18 I.OU 43 35 1.100 J 1,251 16 NA NA NA NA NA NA 05/08/06 6.28 6.21 NA 12.7 1,295 62 55 32 . 1 u 130 5.5 170 455 45 0.002 U 0.005 U 0.20 0.001 U 20.4 329 08/19/06 6.57 6.68 J NA 12.8 798 28 38 6.7 2.0 U 4.1 7.1 180 264 28 0.002 U 0.005 U 0.07 0.001 U 5.99 114 08/19/06 (DUP) 6.57 NA NA 12.8 798 25 38 6.5 2.0 U 3.7 6.5 160 240 NA NA NA NA NA NA NA 11/06/06 6.55 6.57 J NA 10.2 706 27 34 8.5 3.0 U 17 12 330 429 38 0.002 U 0.005 U 1.32 0.001 9 75.5 11/6/06 (DUP) 6.55 NA NA 10.2 706 27 34 8.6 3.0 U 17 12 330 429 NA NA NA NA NA NA NA 02/19/07 6.48 NA NA 12.9 895 31 36 12.3 0.3 21 21 780 902 27 NA NA NA NA NA NA 02/19/07 (DUP) 6.48 NA NA 12.9 895 37 41 11.3 0.6 24 24 920 1,058 NA NA NA NA NA NA NA 04/30/07 6.31 6.291 NA 12.8 1.000 62 57 17 20 U 70 11 190 407 36 0.002 U 0.005 U 0.06 o.oot 16.7 153 04/30/07 (DUP) 6.31 NA NA 12.8 1,000 63 59 18.2 1.5 J 72 11 190 , 415 NA NA NA NA NA NA NA 08/15/07 6.68 6.67 J NA 13.0 855 15 19 4.1 1.0U 5.1 7.3 100 150 18 0.002 U 0.005 U 0.09 0.001 U 9.65 61.5 08/15/07 (DUP) 6.68 NA NA 13.0 855 15 19 4 1.0U 5 7.6 100 150 NA NA NA NA NA NA NA 10/30/07 6.47 6.36 J NA 13.2 836 28 28 16.4 0.5 37 15 290 415 20 0.002 U 0.005 U 0.05 U 0.001 U 16.4 156 10/30/07 (DUP) 6.47 NA NA 13.2 836 29 29 16.4 0.5 37 14 300 426 NA NA NA NA NA NA NA 02/06/08 6.27 6.50 NA 14.5 875 75 52 36 20 U 110 38 2,700 3,011 18 0.002 U 0.005 U 1.59 0.005 18 262 02/06/08 (DUP) 6.27 6.50 NA 14.5 875 71 52 38 20 U 120 41 2,600 2 922 NA NA NA NA NA NA NA 05/11/08 6.20 6.06 J NA 12.8 947 63 32 16 0.6 91 3.4 96 302 18 0.002 U 0.008 U 0.05 0.001 U 30.2 339 05/11/08 (DUP) 6.20 NA NA 12.8 947 63 32 14 I.OU 91 2.9 95 298 NA NA NA NA NA NA NA 08/03/08 6.28 6.52 J NA 13.0 1,092 51 39 15.2 0.6 75 6.2 130 317 20 . 0.002 U 0.005 U 0.05 0.00! U 16.3 154 08/03/08 (DUP) 6.28 NA NA 13.0 1,092 52 39 17 20. U 75 6.4 130 319 NA NA NA NA NA NA NA 11/16/08 6.15 6.25 J NA 13.0 1,178 57. 38 18.3 0.6 92 5.8 260 472 26 0.002 U 0.005 U 0.06 0.00! U 26.1 328 11/16/08 (DUP) 6.15 NA NA 13.0 1,178 60 41 17.3 0.6 90 5.9 260 475 NA NA NA NA NA NA N A02/24/09 6.05 6.22 NA 13.6 931 37 18 5.6 , 0.4 51 2.0 86 200 25 0.003 0.005 U 0.31 0.001 U 31.6 336 02/24/09 (DUP) 6.05 NA NA 13.6 931 38 19 5.9 0.4 52 2.0 92 209 NA NA NA NA NA NA NA 05/05/09 6.50 6.07 J NA 12.8 877 29 16 3.5 0.3 28 3.1 37 117 19 0.002 U 0.005 U 0.05 U 0.001 U 23.0 227 05/5/09 (DUP) 6.50 NA NA 12.8 877 28 16 3.2 0.3 28 2.9 36 114 NA NA NA NA NA NA NA 08/12/09 6.76 6.57 NA 13.2 855 18 20 5.3 0.3 14 4.2 75 137 II 0.002 U 0.006 0.05 U 0.001 U 13.0 103 08/12/09 (DUP) 6.76 6.56 NA 13.2 855 18 20 5.4 0.3 14 4.3 74 136 II 0.002 U 0.007 0.05 U 0.001 12.8 104 10/28/09 6.55 6.61 NA 10.1 975 12 II 4.0 0.2 U 16 .4.1 85 132 10 0.002 U 0.005 U 0.05 U 0.001 U 14.8 115 10/28/09 (DUP) 6.55 6.59 NA 10.1 975 12 . II 4.1 0.2 U 15 4.1 • 79 125 9.8 0.002 U 0.005 U 0.09 0.001 U 15.3 117 05/19/10 6.22 6.34 NA 12.9 726 9.6 6.2 0.6 0.2 U 4.3 1.8 8.4 31 10 0.002 U 0.005 U 0.05 U 0.001 U 17.0 107 05/19/10 (DUP) „ 6.22 6.33 NA 12.9 726 9.4 6.0 0.6 0.2 U 4.3 1.8 8.4 31 11 0.002 U 0.005 U 0.09 0.002 185 III 08/16/10 6.51 NA NA 13.7 840 18 12 3.1 . 0.3 14 2.5 39 89 17 0.002 U 0.005 U 0.05 U 0.0OI u 16.2 168 10/31/10 6.61 NA NA 5.8 861 14 J 7.1 1.0 0.2 U 7.3 1.3 34 65 12 -- 0.002 U 0.005 U 35.5 0.001 23.3 182 05/24/11 6.64 NA 1.1 U 12.6 627 4.2 2.6 0.2 U 0.2 U 0.4 1.0 2.9 11 4.0 0.002 U 0.005 U 0.05 U 0.0001 u 21.2 40 05/24/11 6.64 NA 1.1 U 12.6 627 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 20.6 (D) NA 07/24/11 6.64 NA 1.1 U 12.3 700 7.7 4.8 0.9 0.2 U • 4.2 1.7 23 42 7.1 0.002 U • 0.005 U 0.05 U 0.0001 u 15.4 68 07/24/11 6.64 NA NA 10 3 700 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 15.3(D) NA 07/24/11 (DUP) 6.64 NA I.I U 12.3 700 8.1 5.1 0.9 0.2 U 4.4 1.6 23 43 NA NA NA NA NA NA NA 10/27/11 6.80 NA NA 12.7 693 8.8 5.8 2.3 0.2 U 12 2.4 61 92 5.9 0.002 U 0.005 U 0.05 U 0.0001 16.0 85.0 10/27/11 (DUP) 6.80 NA NA 12 7 693 8.3 5.8 2.4 0.2 U 12 2.4 60 91 NA NA NA NA NA NA NA 01/30/12 6.49 NA NA 12 5 671 2.2 1.3 0.2 U 0.2 U 0.9 1.0 4.4 9.8 3.3 0.002 U 0.005 U 0.05 U 0.0001 u 26.8 57.6 1/30/12 (DUP) 6.49 NA NA 12 5 671 2.4 1.3 0.2 U 0.2 U 1.0 1.0 4.2 9.9 3.1 NA NA NA NA NA NA

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Table 4

Summary of Ana ly t ica l Results for Mon i to r ing and Interceptor Wel ls

L indsay Manu fac tu r ing , L L C

L indsay , Nebraska

Specific Organic Analyses (u Inorganic Analyses (mg/L)

Water Conductivity pH PH TSS (mg/L) Temperature (u mho/cm) Total Volatile

Well Identification Date Collected (Held) flab) (lab) (°C) (field) (Held) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3d 0.05 5.0d 250d

Alternate Cleanup Level * On Property > 5.0 5.0 NE . NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level 8 Off Property 2.6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

MW89-13 11/01 6.88 NA NA 11.3 456 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U S.OU ND NA NA NA NA NA NA NA 2/02 7.22 NA NA 9.7 528 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U sou ND NA NA NA NA NA NA NA 5/02 6.73 NA NA 11.6 536 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U S.OU 5.0 U ND NA NA NA NA NA NA NA 8/02 7.18 NA NA 14.1 513 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ ND NA NA NA NA NA NA 30 11/02 7.29 NA NA 11.4 583 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA NA NA NA NA NA NA 2/03 6.57 NA NA 10.4 605 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA NA NA NA NA NA NA 5/03 7.10 7.3 J NA 11.4 495 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA 0.002 U 0.005 U 0.05 U 0.001 U 0.326 36 8/03 7.33 NA NA 12.2 567 1.0 U I.OU I.OU I.OU 1.0U 1.0U 5.4 5.4 NA NA NA . NA NA NA NA 11/03 7.25 7.44 J NA 11.3 505 1.0 U 1.0U I.OU I.OU 1.0 U I.OU 4.4 4.4 NA 0.002 U 0.006 0.05 0.001 U 0.212 34 2/04 7.02 NA NA 10.5 512 1.0 U 1.0U I.OU 1.0U I.OU 1.0U 5.8 5.8 NA NA NA NA NA NA NA 5/04 7.39 NA NA 11.4 440 1.0 U 1.0U I.OU I.OU 1.0 U 1.0U 5.3 5.3 NA NA NA NA NA NA NA8/04 7.4! 7.33 NA 12.3 466 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 3.1 3.1 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.037 29.8 11/08/04 7.40 7.53 J NA 111 430 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.6 1.6 NA 0.002 U 0.005 0.05 U 0.001 U 0.09 27.7 02/21/05 6.94 NA NA 11.4 382 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.0 2.0 . NA NA NA NA NA NA NA 05/02/05 7.56 7.42 J NA 11.6 363 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.9 0.9 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.205 27.4 07/31/05 7.61 NA NA 15.5 458 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.6 0.6 NA NA NA NA NA NA NA 11/07/05 7.44 7.63 NA 13.6 465 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.3 2.3 NA 0.002 U .0.013 0.18 0.001 U 0.153 28.4 01/30/06 7.06 NA NA 12.0 387 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.7 0.7 NA NA • NA NA NA NA NA 05/09/06 7.25 7.14 NA 13.4 436 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.1 I.I NA 0.002 U 0.005 0.06 0.001 U 0.226 27.6 08/20/06 6.86 NA NA 16.2 510 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.8 0.8 NA NA NA NA NA NA NA 11/07/06 7.14 NA NA 11.8 403 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.5 2.5 NA NA NA NA NA NA NA 02/11/07 7.09 NA NA 11.4 508 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.7 2.7 NA NA NA NA NA NA NA 05/01/07 6.84 6.69 J NA 12.7 582 0.2 0.2 U 0.2 U 0.2 U 0.2 0.2 U 2.8 3.2 2.0 U 0.002 U 0.007 0.71 0.001 U 3.99 82.9 08/13/07 7.35 NA NA 13.6 574 0.2 U 0.2 U 0.2 U 0.2 U . 0.4 0.2 U 6.3 6.7 NA NA NA NA NA NA NA 10/29/07 7.15 NA NA 12.6 438 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 4.7 4.9 NA NA NA NA NA NA NA 02/04/08 7.06 NA NA 12.5 509 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.2 U 7.5 7.9 NA NA NA NA NA NA NA 05/12/08 6.77 7.26 J NA 12.0 414 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 5.8 6.1 2.0 U 0.002 U 0.007 0.08 0.002 0.20 39.8 08/06/08 7.38 7.37 NA 14.1 559 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.2 U 8.7 9.1 2.0 U 0.002 U 0.012 0.09 0.001 U 0.13 32.7 11/18/08 7.18 7.15 NA 11.9 528 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 5.0 5.2 2.0 U 0.002 U 0.013 0.09 0.001 U 0.17 30.9 02/17/09 7.90 6.95 NA 12.1 518 0.4 0.2 U 0.2 U 0.2 U 0.3 0.2 U 4.8 5.5 2.0 U 0.002 U 0.008 0.28 0.001 U 1.07 77.0 05/07/09 7.30 7.03 NA 12.3 592 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 5.6 5.9 2.0 U 0.002 U 0.009 0.10 0.001 U 0.47 34.3 07/27/10 7.37 NA NA 13.8 461 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.6 2.6 2.0 U 0.002 U 0.007 0.09 0.001 u 0.13 31.2 10/27/10 7.42 NA NA 11.5 441 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.8 1.8 2.0 U 0.002 U 0.010 0.11 0.O0I u 0.11 28.4 02/13/11 7.11 NA NA • 13.3 389 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2.0 2.0 2.0 U 0.002 U 0.009 0.65 0.001 u 0.49 54.1 05/24/11 6.79 NA 1.1 13.4 395 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.8 1.8 2.0 U 0.002 U 0.009 0.12 0.0001 u 0.19 25 05/24/11 6.79 NA I.I 13.4 395 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 0.11 (D) NA 07/25/11 7.87 NA 1.1 U 14.5 422 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.6 1.6 2.0 U 0.002 U 0.008 0.09 0.0001 u 0.08 21 07/25/11 7.87 NA NA 14.5 422 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.0001 U(D) 0.06 (D) NA 11/01/11 7.35 NA NA 1 1.8 353 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.6 J+ 1.6 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 u 0.09 27.5 02/01/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.0 1.0 NA NA NA NA NA NA NA

MW89-14 11/01 5.88 6.3 J NA 11.6 660 5.0 U 5.0 U 5.0 U 5.0 U 8.0 5.0 U 5.0 13 NA 0.003 0.027 3.31 0.005 10.1 170 2/02 5.82 5.8 J NA 10.5 690 5.0 U 5.0 U 5.0 U 5.0 U S.OU 5.0 U 6.0 6.0 NA 0.004 0.019 2.42 0.003 16.1 360 5/02 5.61 5.2 J NA 14.2 1,110 5.0 U 5.0 U 5.0 U 5.0 U 5.0 •5.0U 7.0 12 NA 0.006 0.006 J 2.21 0.002 U 17.6 280 8/02 6.26 6.26 J NA 14.1 858 12 J 5.0 UJ 5.0 UJ 5.0 UJ 19 J 5.0 UJ 9.0 J 40 NA 0.004 0.005 U 1.16 0.001 U 10.5 200 11/02 6.51 5.87 J NA 11!3 754 8.0 5.0 U 5.0 U 5.0 U 15 S.OU 11 34 NA 0.003 0.007 1.08 0.001 7.08 ISO 2/03 5.71 5.42 J NA 9.8 594 5.0 U 5.0 U 5.0 U 5.0 U S.OU • 5.0 U 6.0 6.0 NA 0.002 0.005 U 0.87 0.001 6.74 160 • 5/03 5.21 5.14J NA 14.9 345 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 8.0 8.0 NA 0.003 0.005 U 1.41 0.001 u 7.23 180 8/03 . 6.25 5.80 J NA 13.4 709 4.1 I.OU 1.0U I.OU 7.2 1.0U 6.8 18 NA 0.003 0.005 U 1.08 0.001 u 8.62 190 11/03 6.11 5.86 J NA 11.4 505 2.1 I.OU 1.0U I.OU 4.4 I.OU 5.6 12 NA 0.002 0.005 U 0.64 0.002 6.58 ISO . 2/04 5.96 5.53 NA 13.0 457 1.0U I.OU I.OU I.OU 1.0 U I.OU 2.5 2.5 NA 0.002 U 0.005 0.68 0.001 4.60 130 5/04 6.30 6.23 NA .14.1 531 1.0U I.OU I.OU I.OU I.OU 1.0U 2.4 2.4 NA 0.002 0.005 1.81 0.001 «53 188 8/04 6.73 6.05 NA 13.1 632 0.9 0.2 U 0.2 U 0.2 U 1.3 0.2 U 3.0 5.2 NA 0.002 U 0.006 0.92 0.001 u 4.87 132 11/08/04 6.77 6.12 J NA 12.3 590 0.8 0.2 U 0.2 U 0.2 U 0.9 0.2 U 2.7 4.4 NA 0.002 U 0.005 U 0.73 0.001 u 5.11 125 02/21/05 6.34 6.02 J NA 10.9 433 0.7 J 0.2 U 0.2 U 0.2 U 0.6 0.2 U 2.3 2.9 NA 0.002 U 0.005 U 0.32 0.001 2.80 81.3 05/03/05 6.32 6.03 J NA 12.8 609 • 0.7 0.2 U 0.2 U 0.2 U 0.8 0.2 U 2.4 3.9 NA 0.002 U 0.005 0.57 0.001 u 5.08 IIS 08/03/05 7.00 6.59 NA 14.3 743 1.0 0.2 U 0.2 U 0.2 U 2.5 0.2 U 3.4 6.9 NA 0.002 U 0.012 1.21 0.002 3.05 95 11/07/05 5.88 6.42 NA 12.4 516 1.6 1.0 0.8 0.2 U 3.1 0.2 U 4.2 II NA 0.002 0.009 0.87 0.002 7.82 181 01/30/06 6.06 5.50 J NA 10.2 331 0.9 0.2 U 0.2 U 0.2 U 0.7 0.2 U 2.4 4.0 NA 0.002 U 0.011 1.72 0.004 4.25 91.3 05/09/06 6.05 5.80 NA 13.1 362 1.1 0.2 U 0.2 U 0.2 U 0.9 0.2 U 3.3 5.3 NA 0.002 U 0.009 1.24 0.002 4.63 I2S 08/20/06 5.65 5.85 J NA 13.4 587 3.9 2.7 3.1 0.2 U 7.0 0.3 5.2 22 NA 0.006 0.098 4.11 0.011 12.3 196 11/07/06 5.93 5.99 J NA 11.5 342 2.8 3.3 4.7 0.2 U 4.3 0.3 2.9 18 NA 0.003 0.008 0.64 0.001 4.70 101 02/11/07 6.22 5.65 J NA 10.2 372 1.4 0.5 0.6 0.2 U 1.2 0.2 U 2.8 6.5 NA 0.002 0.005 V 0.46 0.001 u 3.82 94.3

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Tabic 4 Summary of Analytical Results for Monitoring and Interceptor Wells Lindsay Manufacturing, L L C Lindsay, Nebraska


Water Conductivity pH pH TSS (mg/L) Temperature (umho/ctn) Total Volatile

Well Identification Date Collected (field) (lab) (lab) C O (Held) (field) 1,1-DCE 1,1-DCA l ,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead • Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 6.05 • 0.3d 0.0S 5.0d 250d

Alternate Cleanup Level On Property 2 5.0 2 5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level 1 Off Property 2 6.3 2 6 3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

MW89-15 11/01 5.02 4.8 J NA 12.6 2,010 140 20 13 5.0 U 200 5.0 U no 483 NA 0.007 0.01 U 33.3 0.001 U 127 1,100 2/02 6.18 6.2 J NA 10.5 1,430 110 7 S.OU S.OU 130 5.0 U 93 340 NA • 0.002 0.008 1.84 0.001 U 71.5 600 5/02 6.58 6.5 J NA 13.9 1,210 67 5.0 U 5.0 U 5.0 U 89 5.0 U 56 212 NA . 0.002 0.005 J 0.36 0.001 U 43.8 320 8/02 5.29 5.32 J NA 14.0 1,330 180 J 54 J 50 J 5.0 UJ 290 J 5.0 UJ 170 J 744 NA 0.007 0.006 19.1 0.001 U 71.2 580 11/02 5.63 5.70 J NA 11.5 1,920 130 36 40 5.0 U ISO 5.0 U 110 496 NA 0.007 0.01 U 19.2 0.001 U 94.8 730 2/03 5.86 6.31 J NA 10.8 1.530 46 S.OU 5.0 U 5.0 U SI S.OU 38 135 NA O.005 0.005 U 3.41 0.002 62.4 390 5/03 6.28 6.39 J NA 14.7 1,040 58 5.0 U 5.0 U 5.0 U 76 5.0 U 53 187 NA 0.005 0.009 3.67 0.001 U 49.4 340 8/03 5.61 5.81 J NA 14.0 1,123 84 23 22 I.OU 130 1.7 82 343 NA 0.005 0.01 S 21 0.001 60.1 520 II /03 5.82 6.13J NA 11.8 1,124 55 7.9 2.8 I.OU 71 1.0 U 37 174 NA 0.004 0.005 U 3.09 0.002 48.8 330 2/04 5.17 5.48 NA 11.6 1,417 110 47 48 I.OU 200 3.9 120 529 NA 0.004 0.010 55 0.002 51.0 • 680 5/04 4.96 4.94 J NA 12.5 1,474 110 J 60 J 72 J 3.0 UJ 220 J 6.7 J 170 J 639 NA 0.002 U 0.009 69.9 0.001 39.6 648 8/04 5.56 5.26 NA 13.9 1,360 71 38 45 I.OU 120 3.6 110 388 8.3 0.002 U 0.025 66.3 0.001 U 56.8 67211/09/04 5.71 5 .70 J NA 11.0 1,638 120 37 44 I.OU 130 2.6 120 454 14 J 0.004 0.007 59.5 0.001 u 95.2 • 924 02/21/05 5.40 5.19 J NA 11.6 1,786 84 19 19 I.OU 99 1.2 87 . 309 20 0.008 0.01 U 32.4 0.001 141 1,050

• 05/03/05 5.61 5.74 J NA 113 1,603 37 4.4 3.1 1.0U 46 1.0U 31 122 S.5 0.005 0.005 U 5 9 0.001 76.9 448 08/03/05 6.22 6.31 NA 13.2 986 .10 3.4 4.1 0.2 U 15 0.3 12 45 5.0 U 0.005 0.016 7.42 0.001 29.2 157 11/07/05 6.26 6.43 NA 11.8 1,247 20 6.8 7.4 0.2 U 28 0.6 23 86 7.2 J 0.004 0.008 2.S3 0.001 u 44.7 286 11/7/05 (DUP) 6.26 NA NA 11.8 1,247 20 6.7 7.2 1.0U 27 1.0U 24 85 NA NA NA NA NA NA NA 01/30/06 6.32 6.43 J NA 10.4 997 21 3.3 2.7 0.6 U 21 0.6 U 18 66 4.0 U 0.003 0.010 1.21 0.002 28.6 161 05/09/06 6.22 6.34 NA 11.8 1,235 27 2.4 1.6 0.4 U 25 0.4 U 18 74 5.3 0.003 0.010 2.61 0.001 U 40.4 363 08/20/06 6.32 6.55 J NA 11.8 918 4.5 1.6 2.1 0.2 U 5.5 0.2 6.4 20 2.0 U 0.003 0.008 1.76 0.001 u 19.5 134 11/07/06 . 6.41 6.50 J NA 11.7 959 12 3.4 3.5 0.2 U 14 0.3 16 49 2.3 0.003 0.005 U 1.1 0.001 24.1 176 02/11/07 6.71 6.48 J NA 10.2 1,148 20 J 2.7 2.3 0.2 U 15 0.3 15 55 2.4 0.002 0.011 0.38 0.002 22.7 165

Staika Well 08/25/06 6.71 6.70 NA 14.0 876 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 0.005 U 0.95 0.009 0.466 23.5

Ol Well 11/01 6.44 NA NA 12.1 929 28 5 .0 U 5.0 U S.OU 35 5.0 U 23 86 NA NA NA NA NA NA NA 2/02 6.73 NA NA 11.3 642 20 5.0 U 5.0 U 5.0 U 9.0 •5.0 U 32 61 NA NA NA NA NA NA NA 5/02 6.67 6.7 J NA 11.9 726 18 5.0 U 5.0 U 5.0 U 7.0 5.0 U 33 58 NA 0.002 U 0.005 UJ 0.25 0.001 U 12.5 210 8/02 6.32 NA NA 11.6 1,207 120 J 45 J I6J S.O UJ 290 J 5.0 UJ 110 J S8I NA NA NA NA NA NA NA 11/02 6.42 NA NA 12.8 8S0 35 8.0 S.OU S.OU 59 5.0 U 35 137 NA NA NA NA NA NA NA 2/03 6.40 NA NA 13.0 805 13 5.0 U 5.0 U S.OU II 5.0 U 16 40 NA NA NA NA NA NA NA 5/03 6.67 6.75 J NA 13.7 643 10 5.0 U 5.0 U s:ou 6.0 5.0 U 17 33 NA 0.002 U 0.005 U 0.26 0.003 6.17 140 8/03 6.43 NA NA 11.8 1,099 44 7.1 1.7 1.0 u 61 I.OU 40 154 NA NA NA NA NA NA NA 11/03 6.43 NA NA 11.2 881 35 8.8 3.3 I.OU 58 I.OU 29 134 NA NA NA NA NA NA NA 2/04 6.39 NA NA 11.5 830 13 I.OU I.OU I.OU II I.OU 15 39 NA NA NA NA NA NA NA 5/04 6.46 6.63 J NA 12.0 971 14 I.OU 1.0U 1.0U 6.6 I.OU 19 40 NA 0.002 U 0.005 U 8.34 0.064 26.4 361 8/04 6.65 NA NA 14.0 1,140 49 21 9.0 1.0U 91 I.OU 50 220 NA NA NA NA NA NA NA 11/09/04 6.47 NA NA 11.4 819 21 6.5 3.7 I.OU 30 1.0 U 24 85 NA NA NA NA NA NA NA 02/22/05 6.52 NA NA 11.4 966 14 0.5 0.4 U 0.4 U 8.0 0.4 U 13 36 NA NA NA NA NA NA NA 05/02/05 6.74 6.88 J NA 11.0 917 B.l 0.2 0.2 U 0.2 U 4.4 0.2 U 10 23 4.0 J 0.002 U 0.005 U 0.31 0.001 U 21 327 07/31/05 6.44 6.56 J NA 12.5 1,188 96 47 27 1.0U 170 2.7 130 473 23 0.002 U 0.007 1.62 0.036 29.7 335 11/07/05 6.66 NA NA 1 1.1 755 21 9.2 4.3 I.OU 44 1.0U 24 103 . NA NA NA NA NA NA NA 01/29/06 6.75 NA NA 11.4 679 10 1.0 0.3 0.2 U 11 0.2 U 9.1 31 4.0 U NA NA NA NA NA NA 05/09/06 6.71 6.52 NA 11.9 886 9.4 0.5 0.2 U 0.2 U 9.2 0.2 U 88 28 3.2 0.002 U 0.008 1.90 0.004 18.8 243 08/19/06 . 6.46 6 30 J NA 119 914 42 25 13 I.OU 93 1.4 53 227 II 0.002 U 0.005 U 6.22 0.001 U 28.3 160 11/06/06 6.81 NA NA 12.0 618 7.1 2.6 1.2 0.2 U 12 0.2 U 8.8 32 2.0 U NA NA NA NA NA NA 02/19/07 6.84 NA NA 11.5 714 4.6 0.3 0.2 U 0.2 U 3.8 0.2 U 4.2 13 2.0 U NA NA NA NA NA NA 05/04/07 6.28 6.30 J NA 11.6 789 12 0.8 0.3 0.2 U 9.1 0.2 U 9.9 32 2 2 0.002 U 0.005 U 2.79 0.001 U 20.9 187 08/12/07 6.55 NA NA 12.5 928 29 15 7.0 I.OU 55 1.0U 36 142 7.7 NA NA NA NA NA NA 10/30/07 6.40 NA NA 12 2 708 20 7.7 3.2 0.2 26 0.3 22 79 3.6 NA NA NA NA NA NA 02/06/08 6.65 NA NA 11.7 548 5.6 0.3 0.2 U 0.2 U 4.7 0.2 U 4.6 15 2.0 U NA NA NA NA NA NA 08/07/08 6.45 NA NA 11.8 781 6.7 0.7 0.2 0.2 U 5.8 0.2 U 6.4 20 2.0 U NA NA NA NA NA NA 03/05/09 6.80 NA NA 8.4 730 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 1.69 0.067 2.11 NA 05/07/09 7.00 NA NA 22.8 629 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 0.05 U 0.001 u 0.87 NA 08/13/09 6.32 6.42 NA 12 2 716 4.2 1.7 0.7 0.2 U 6.6 0.2 U 5.6 19 2.0 U 0.002 U 0.007 1.6 0.001 u 7.51 60.1 05/19/10 6.65 6.62 NA 12.0 707 1.8 0.2 U 0.2 U 0.2 U 1.8 0.2 U 2.6 6.2 2.0 U 0.002 U 0.005 U 1.15 0.001 8.19 71.7 08/16/10 6.58 NA NA 11.8 779 10 2.5 0.8 0.2 U 11 0.2 U 11 35 2.0 U 0.002 U 0.005 U . 2.13 0.001 u 9.85 NA 11/01/10 6.55 NA NA 11.8 620 5.1 1.7 0.8 0.2 U 4.9 0.2 U 6.0 19 2.0 U 0.002 U 0.005 U 1.47 0.001 6.46 NA 02/16/11 • 6.90 NA NA 11.4 506 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.51 0.001 0.89 NA 05/26/11 6.88 NA 1.1 U 12.3 699 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.25 0.0001 u 3.20 50 05/26/11 6.88 NA I.I U 12.3 699 NA NA NA NA NA NA. NA NA NA 0.002 U (D) 0.005 U (D) 0.22 0.0001 U(D) 3.14(D) NA 07/25/11 6.45 NA 1.1 12.9 762 0.4 0.2 U 0.2 V 0.2 U 0.3 0.2 U 0.4 I.I 2.0 U 0.002 U 0.005 U 0.26 0.0001 u 2.87 46 07/25/11 6.45 NA NA 12.9 762 NA NA NA NA NA NA NA ND NA 0.002 U (D) 0.005 U (D) 0.09 (D) 0.0001 U(D) 2.55 (D) NA 10/27/11 7.02 NA NA 116 604 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U O.OSU 0.0001 u 0.85 NA

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Page 4 of 22 URS Corporation

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Table 4 Summary of Analytical Results for Monitoring and Interceptor Wells Lindsay Manufacturing, L L C Lindsay, Nebraska

Specific Organic Analyses (u i/L) loorgaaic Analyses (mg/L)

Water Conductivity J pH pH TSS (mg/L) Tempera hire (umho/cm) Total Volatile

Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA .TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3d 0.05 5.0 2S0d

Alternate Cleanup Level On Property 23.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

AOIW 11/01 6.27 NA NA 13.9 463 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA NA NA NA NA NA NA 2/02 6.28 NA NA 13.5 379 5.0 U 5.0 U • 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA NA NA NA NA NA NA 5/02 6.39 6.4 J NA 13.8 381 5.0 U 5.0 U 5.0 U S.OU . 5.0 U 5.0 U 5.0 U ND NA 0.002 U 0.005 UJ 0.14 0.001 u 2.05 46 8/02 6.09 NA • NA 12.9 475 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ 5.0 UJ ND NA NA NA NA NA NA NA 11/02 6.18 NA NA 13 514 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA NA NA NA NA NA NA 2/03 6.10 NA NA 12.4 521 5.0 U 5 .0 U 5.0 U 5.0 U 6.0 S.OU 5.0 U 6.0 NA NA NA NA NA NA NA 5/03 6.22 6.42 J NA 12.7 434 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U ND NA 0.002 U 0.005 U 0.24 0.004 2.26 52 8/03 6.19 NA NA 15.0 482 5.0 1.8 I.OU I.OU 9.2 1.0U 5.6 22 NA NA NA NA NA NA NA 11/03 6.11 NA NA 12.0 585 12 2.1 I.OU I.OU 13 I.OU 13 40 NA NA NA NA NA NA NA 2/04 6.08 NA NA 12.5 559 12 4.0 1.3 I.OU 18 I.OU 12 47 NA NA NA NA NA NA NA 5/04 6.06 6.47 NA 13.7 572 12 2.8 I.OU I.OU 14 I.OU 9.8 39 NA 0.002 U 0.005 U 0.05 U 0.002 2.76 87.3 8/04 6.67 NA NA 12.6 842 34 16 5.7 0.2 U 44 1.2 66 167 II NA " N A NA NA NA NA 11/09/04 6.59 NA NA 12.3 . 653 14 5.1 2.4 1.0U 16 I.OU 18 56 3.4 J NA NA NA NA NA NA 02/22/05 6.65 6.41 J NA 12.5 493 4.6 I.I 0.4 0.2 U 4.6 0.2 U 5.0 16 5.0 U 0.002 U 0.005 U 0.16 0.001 U 0.806 61.4 05/02/05 6.98 NA NA 12.1 561 5.1 2.0 0.9 0.2 U 6.8 0.2 U 7.1 22 2.5 J NA NA NA NA NA NA 07/31/05 6.57 NA NA 12.8 826 27 '12 4.1 0.2 U 29 1.2 70 143 14 NA NA NA NA NA NA 11/06/05 6.53 NA NA 12.4 799 21 10 5.0 1.0U 34 1.1 44 115 11 J NA NA NA NA NA NA 01/31/06 6.45 NA NA 12.3 643 9.7 4.9 2.1 0.2 U 16 0.2 14 47 4.0 U NA NA NA NA NA NA 05/08/06 6.76 NA NA 12.6 659 8.6 3.8 1.9 0.2 U 14 0.3 14 43 4.0 NA NA NA NA NA NA 08/19/06 6.61 NA NA 12.6 799 20 7.4 2.5 1.0U 19 I.OU 34 83 8.5 NA NA NA NA NA NA 11/06/06 6.43 NA NA 12.4 772 16 7.2 3.6 I.OU 26 I.OU 24 77 6.2 NA NA NA NA NA NA 02/20/07 6.4] NA NA 12.2 716 9.4 4.1 2.5 0.2 U 14 0.3 14 44 2.9 NA NA NA NA NA NA 04/30/07 6.74 NA NA 12.4 799 19 6.7 2.8 0.2 U 29 0.5 28 86 6.0 NA NA NA NA NA NA 08/12/07 6.77 6.62 J NA 13.3 943 22 6.8 2.8 1.0U 19 I.OU 42 93 9.9 0.002 U 0.005 U 0.05 U 0.001 0.74 121 10/30/07 6.55 NA NA 12.7 717 12 5.0 2 2 0.2 U 14 0.3 14 48 3.8 NA NA NA NA NA NA 08/06/08 6.50 NA NA 12.4 903 25 8.4 3.3 0.2 U 28 0.9 58 124 6.6 NA NA NA NA NA NA 11/16/08 6.63 NA NA 12.4 737 1.7 0.7 0.3 0.2 U 2.4 0.2 U 2.5 7.6 2.0 U NA NA NA NA NA NA 02/24/09 6.52 NA NA 12.2 550 0.9 0.3 0.2 U 0.2 U 1.0 0.2 U 1.4 3.6 2.0 U 0.002 U 0.005 U 0.09 0.002 0.44 NA 05/05/09 7.10 NA NA 14.0 670 2.7 0.3 0.2 U 0.2 U 1.3 0 2 U 1.9 6.2 2.5 0.002 U 0.005 U 0.05 U 0.001 0.39 NA 08/12/09 7.01 6.81 NA 12.8 789 II 4.2 *1.3 0.2 U 17 1.1 52 87 4.5 0.002 U 0.007 0.05 U 0.001 U 0.45 56.6 05/19/10 6.74 6.85 NA 12.5 616 1.2 0.2 U 0.2 U 0.2 U 0.6 02 U 1.1 2.9 2.0 U 0.002 U O.005 0.05 U 0.001 0.34 35.5 . 08/16/10 6.77 NA NA 12.4 673 6.7 1.8 0.5 0.2 U 8.3 0.5 38 56 3.5 0.002 U 0.005 U 0.05 U 0.001 U 0.52 49.6 08/16/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.43 (D) NA 08/16/10 (DUP) 6.77 NA NA 12.4 . 673 5.9 1.7 0.5 0.2 U 7.4 0.5 35 51 NA NA NA NA NA NA NA 11/02/10 6.97 NA NA 12.2 493 0.5 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U 0.7 1.2 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.26 27.8 11/02/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U(D) 0.05 U (D) 0.001 U(D) 0.27(D) NA 11/2/10 (DUP) 6.97 NA NA 12.2 493 0.5 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.8 1.3 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.27 27.4 02/15/11 7.49 NA NA 10.6 442 0.5 0.3 0.2 U 0.2 U 1.0 0.4 20 22 2.0 U 0.002 U 0.005 U 21.1 0.002 0.20 27.6 02/15/1 1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 (D) NA 1

05/26/11 6.93 NA I.OU 12.4 586 0.6 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.5 1.4 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.22 18 05/26/1 1 6.93 NA I.OU 12.4 586 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.0001 U(D) 0.22 (D) NA

• 07/24/11 7.00 NA I.I U 12.3 623 4.1 0.8 0.2 U 0.2 U 3.3 02 U 11 19 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.29 26 07/24/11 7.00 NA NA 12.3 623 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.28 (D) NA

MW06-10 (40 feet BTOC) 05/10/06 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.6 1.3 NA NA NA NA NA NA NA 08/25/06 6.18 6.43 NA 13.7 737 0.5 0.2 U 0.2 U 0.2 U 1.6 0.2 U 1.2 3.3 2.0 U 0.002 U 0.030 25.4 0.024 0.860 68.7 11/09/06 5.95 6.33 NA 11.8 222 0.4 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.7 1.5 2.0 U 0.002 U 0.031 28.6 0.022 0.919 31.5 02/19/07 6.32 6.57 J NA 11.7 311 0.4 0.2 U 0.2 U 0.2 UJ 0.4 0.2 U 0.2 1.0 2.0 U 0.002 U 0.027 22.1 0.009 0.556 31.5 05/03/07 6.10 6.75 NA 12.5 287 0.6 0.2 U 0.2 U 0.2 U 0.7 0.2 U 0.4 1.7 2.0 U 0.002 0.059 41.8 0.003 3.43 39.7 08/15/07 6.05 6.47 J NA 13.4 331 0.4 0.2 U 0.2 U 0.2 U 0.7 0.2 U 0.4 1.5 2.0 U 0.002 U 0.017 13.1 0.006 U 0.37 U 48.7 10/30/07 6.13 6.65 J NA 1 1.8 261 0.4 0.2 U 0.2 U 0.2 U 1.1 0.2 U 0.6 2.1 2.0 U 0.002 U 0.014 10.6 0.008 0.39 39.5 10/30/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.3 (D) NA 02/07/08 5.95 6.37 NA 10.6 290 1.0 0.9 0.3 0.2 U 2.6 0.2 U 0.9 5.7 2.0 U 0.002 U 0.014 10.4 0.009 0.36 39.1 02/07/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.29(D) NA 05/12/08 6:13 6.29 J 78.3 1 1.7 251 2 2 3.1 0.9 0.2 U 8.3 0.2 2 2 17 2.0 U 0.002 U 0.012 7.62 0.007 0.37 J+ 40.1 05/12/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.30 J+(D) NA 08/05/08 6.17 6.27 54.5 12.7 394 I.I 0.6 0.3 0.2 U 2.6 0.2 U 1.7 .6.3 2.0 U 0.002 U 0.014 9.54 0.004 0.37 47.4 08/05/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA '0.002 U(D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.38 (D) NA 11/14/08 6.26 6.51 36.7 11.2 302 0.7 0.2 U 0.2 U 0.2 U 1.0 0.2 U 06 2.3 2.0 U 0.002 U 0.006 3.94 0.001 U 0.30 40.3 11/14/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 0.30(D) NA 02/20/09 6.30 6.45 1.0U 9.6 45B 0.6 0.2 U 0.2 U 0.2 U 0.9 0.2 U O.S 2.0 2.0 U 0.002 U 0.005 U 0.16 0.001 U 0.31 55.9 02/20/09 6.30 NA NA 9.6 458 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.35 (D) NA 05/06/09 6.70 6.23 J 2.0 U 13.6 488 0.5 0.2 U 0.2 U 0.2 U 1.0 0.2 U 0.4 1.9 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.37 62.6 05/06/09 6.70 NA NA 13.6 488 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.38 (D) NA 07/26/10 6.49 NA NA 15.8 539 0.6 0.2 U 0.2 U 0.2 U 1.8 0.2 U 2.1 4.5 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.40 50.8 10/25/10 6.37 NA NA 12.6 536 0.5 0.2 U 0.2 U 0.2 U 2.3 0.2 U 2.5 5.3 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.38 48.7

K:VXI5\I I NCSA *i\a)l2\9 Drtjvtr«blrft9 I F u l RrporuUpnJ BiumiaJATibtertTible 4-Monjiornit WeHi (iloonoriat *rlli] Page 5 of 22 URS Corporation

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Water Conductivity pH pH TSS (mg/L) Temperature (umho/cm) Total Volatile

Well Identification Date Collected (field) flab) (lab) C O (field) (field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dloxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 SO . 250

Alternate Cleanup Level On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500


MW06-10 (40 feet BTOC) 02/13/11 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.8 0.2 U 1.1 2 » NA NA NA NA NA NA NA continued 06/01/11 6.54 'NA 1.1 U 13.5 440 0.4 0.2 U 0.2 U 0.2 U 1.0 0.2 U 1.2 2.6 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.39 37

06/01/11 6.54 NA I.I U 13.5 440 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) . 0.0001 U(D) 0.41 (D) NA 07/28/11 6.66 NA 1.1 U 15.7 618 0.6 J+ 0.2 U 0.2 U 0.2 U 1.9 J+ 0.2 U 2.7 J* 5.2 2.0 U 0.002 U 0.005 U 0.06 0.0002 0.45 42 07/28/11 6.66 NA NA 15.7 618 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.47 (D) NA 11/01/11 6.52 NA NA 11.2 601 0.4 0.2 U 0.2 U 0.2 U 1.3 0.2 U 2.6 4.7 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.49 40.5 02/01/12 NA NA NA NA NA 0.2 0.2 U 0.2 U 0.2 U I.I 0.2 U 1.2 2.5 NA NA NA NA NA NA NA

MW06-11 (60 feel BTOC) 05/10/06 6.85 NA NA 14.5 138 18 6.5 4.1 0.2 U 22 0,3 18 69 NA NA NA NA • NA NA NA 08/24/06 NA NA NA NA . NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.8 1.0 NA NA NA NA NA NA NA 11/09/06 NA NA NA NA NA 10 5.9 5.3 0.2 U 16 0.3 14 52 NA NA NA NA NA NA NA 02/19/07 NA NA NA NA NA 20 6.1 6.1 0.2 U 26 0.5 24 83 NA NA NA NA NA NA NA 05/03/07 NA NA NA NA NA 43 15 16 0.6 U 35 1.0 30 140 NA NA NA NA NA NA NA 05/19/11 6.49 NA 6.6 13.0 1,440 33 2.9 1.9 0.2 U 20 0.4 24 82 5.5 0.003 0.005 U 0.47 0.0003 11.3 NA 05/19/11 6.49 NA 6.6 13.0 1,440 NA NA NA NA NA NA NA NA NA 0.002 (D) O.005 U (D) 0.11 (D) 0.0001 U (D) 10.9(D) NA 07/28/11 6.35 NA 3.8 12.7 1.500 43 J 3.9 •> i 0.2 U '24 0.6 23 J+ 97 4.2 0.003 0.005 U 0.18 0.0001 U 13.7 258 07/28/11 6.35 NA NA 12.7 1,500 NA NA NA NA NA NA NA NA NA 0.004 (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 14.5 (D) NA

(75 feet BTOC) 05/10/06 6.85 NA NA 14.5 138 18 6.0 3.8 0.2 U 18 0.4 18 64 2.6 NA NA NA NA NA NA 08/24/06 6.20 6.45 NA 17.0 NA 0.2 0.2 U 0.2 U 0.2 U 0.4 0.2 U 1.3 1.9 2.0 U 0.002 0.014 9.56 0.007 16.3 74.0 11/09/06 6.37 6.31 NA 12.3 887 12 7.2 6.4 0.2 U 15 0.5 18 59 3.0 0.01 U 0.100 62.2 0.029 32.7 119 02/19/07 6.40 6.46 J NA II.1 1,138 15 7.6 7.6 0.2 U 20 0.5 29 80 4.0 0.011 0.113 101 0.040 45.5 232 05/03/07 6.20 6.19 NA 12.1 1,073 38 14 14 0.6 U 32 1.0 26 125 5.9 0.010 0.096 72.5 0.029 39.9 319 05/19/11 6.56 NA 4.5 12.2 1,430 30 2.7 1.8 0.2 U 18 0.4 22 75 4.6 0.002 0.005 U 0.33 0.0001 U 10.4 NA 07/28/11 7.81 NA 10.1 13.6 1,250 29 3.0 2.0 0.2 U 16 0.4 17 J+ 67 2.6 0.003 0.005 U 0.46 0.0001 12.5 180 07/28/11 7.81 NA NA 13.6 1.250 NA NA NA NA NA NA NA NA NA 0.003 (D) 0.005 U (D) 0.24 (D) 0.0001 U(D) 12.4 (D) NA

(90 feet BTOC) 05/10/06 6.85 NA NA 14.5 138 21 6.2 3.6 0.2 U 21 0.4 16 68 NA NA NA NA NA NA NA 08/24/06 NA NA NA NA NA 0.3 0.2 0.2 U 0.2 U 0.8 0.2 U 2.7 4.0 NA NA NA NA NA NA NA 11/09/06 NA NA NA NA NA 15 7.4 7.2 0.2 U 17 0.5 19 66 NA NA NA NA NA NA NA 02/19/07 NA NA NA NA NA 16 8.4 8.9 0.2 U 23 • 0.6 31 88 NA NA NA NA NA NA NA 05/03/07 NA NA NA NA NA 35 13 14 0.6 U 30 0.9 24 117 NA NA NA NA NA NA NA 08/15/07 6.58 6.51 J NA 12.7 1,000 3.2 0.7 0.6 0.2 U 2.9 0.2 U 3.7 11 2.0 U 0.009 0.128 85.7 0.042 28.2 91.1 10/30/07 6.52 6.39 J NA 11.7 797 2 2 0.5 0.3 0.2 U 2.3 0.2 U 2.4 7.7 20 U 0.009 0.09 64.1 0.046 29.4 69.9 10/30/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 11.3(D) NA 02/07/08 6.36 6.74 NA 11.2 1,059 79 12 4.1 2 U 47 2.0 130 274 2.0 U 0.009 0.081 65.5 0.037 28.9 109 02/07/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 13.5 (D) NA 05/13/08 6.31 6.51 1 1,540 12.0 993 19 2.8 2.4 0.2 U 14 0.3 14 53 2.4 0.011 0.073 54.5 0.041 30.3 8.1 05/13/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 (D) 0.005 U (D) 0.05 U (D) 0.001 (D) 13.5(D) NA 08/05/08 6.70 6.62 1,190 12.3 1,143 II 1.2 0.8 0.2 U 9.0 0.2 U 8.0 30 2.0 U 0.009 0.078 54.0 0.035 251 90.1 08/05/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 7.68(D) NA 11/14/08 6.61 6.69 808 11.1 796 5.6 0.8 0.6 0.2 U 4.2 0.2 U 4.2 15 2 .0 U 0.008 0.044 30.4 0.024 23.3 52.2 11/14/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 8.35 (D) NA 02/20/09 6.50 686 364 10.9 875 68 0.8 0.6 0.2 U 4.2 0.2 U 4.7 17 2.0 U 0.004 0.031 18.7 0.011 14.4 81.0 02/20/09 6.50 NA NA 10.9 875 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.73(D) NA 05/06/09 6.90 6.41 16.6 14.0 1,021 33 1.9 0.6 0.2 U 22 0.3 17 75 .3.4 0.003 0.005 U 1.12 0.001 U 11.7 101 05/06/09 6.90 NA NA 14.0 1,021 NA NA NA NA NA NA NA NA 'NA 0.002 (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 10.1(D) NA 07/27/10 6.56 NA NA 14.4 1,032 19 2.0 1.2 0.2 U 11 0.3 II 46 2.9 0.004 0.016 4.49 0.002 16.1 157 10/27/10 6.56 NA NA 10.6 957 13 2.4 2.0 0.2 U 7.3 0.3 9.9 35 2.0 0.003 0.017 6.04 0.002 13.2 124 02/13/11 NA NA NA NA NA 98 9.2 5.0 I.OU 52 1.4 48 214 NA NA NA NA NA NA NA 05/19/11 6.55 NA 1.2 12.5 1,380 29 2.5 1.8 0.2 U 17 0.4 20 • 71 4.4 0.002 0.005 U 0.17 0.0001 U 9.62 NA 05/19/11 6.55 NA 1.2 12.5 1,380 NA NA NA NA NA NA NA NA NA 0.002 (D) 0.005 U (D) 0.14(D) 0.0001 U(D) 9.60 (D) NA 07/28/11 7.06 NA 2.6 13.1 1.220 25 2.6 1.8 0.2 U 14 0.4 15 J+ 59 2.4 0.002 0.005 U 0.26 0.0001 U 11.1 159 07/28/11 7.06 NA NA 13.1 1.220 NA NA NA NA NA NA NA NA NA 0.0O3 (D) 0.005 U (D) 0.21 (D) 0.0001 U(D) 113 (D) NA 11/01/11 6.52 NA NA 11.1 1.325 45 5.2 3.5 0.2 U 24 1.0 30 109 7.0 0.004 0.009 3.32 0.0007 17.2 286 02/01/12 NA NA NA NA NA 88 12 9.1 0.3 43 2.0 56 210 NA NA NA NA NA NA NA

Adjacent to Facility

MW06-05 (49 feci BTOC) 05/10/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/23/06 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/08/06 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA ,NA NA NA NA 02/12/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA • NA NA NA NA 05/02/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/16/11 6.67 NA 13.7 12.6 727 0.6 0.2 U 0.2 U 0.2 U 0.2 0.2 U 2.1 2.9 2.0 U 0.002 U 0.006 0.88 0.0006 0.01 U 22 05/16/11 6.67 NA 13.7 12.6 727 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 0.01 U (D) NA 07/27/11 6.77 NA 10.7 15.2 741 0.6 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.8 J+ 2.4 2.0 U 0.002 U 0.005 U 0.19 0.0001 0.01 23 07/27/11 6.77 NA NA 15.2 741 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.01 U (D) NA

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Table 4 Summary of Analy t ica l Results for Mon i t o r i ng and Interceptor Wel ls

L indsay Manufactur ing, L L C

L indsay, Nebraska

Specific Organic Analyses (u / L ) \ Inorganic Analyses (mg/L)

Water Conductivity pH pH TSS (mg/L) Temperature (pmho/cm) Total Volatile

Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0d 250d

Alternate Cleanup Level On Property >5.0 . 2 5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level * Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

MW06-05 (69 feet BTOC) 05/10/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

continued 08/23/06 6.91 6.93 J NA 14.5 NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 0.032 12.5 0.009 0.054 27.8

11/08/06 7.10 6.89 J NA 12.3 654 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.006 0.067 . 46.5 0.029 0.191 22.1

02/12/07 6.93 7.12 J NA 10.4 703 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.009 0.134 96.4 0.068 0.373 30.5

05/02/07 6.71 6.72 NA 1 1.9 681 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.006 0.137 91.7 0.056 0.37 30.9

05/16/11 6.65 NA 4.7 13.2 722 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.8 1.0 2.0 U 0.002 U 0.005 U 0.39 0.0002 0.01 U 23

05/16/1 1 6.65 NA 4.7 13.2 722 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.01 U(D) NA

07/27/11 6.74 NA 6.6 14.0 757 0.4 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.3 J+ 1.7 2.0 U 0.002 U 0.005 0.24 0.0002 0.01 23

07/27/11 6.74 NA NA 14.0 757 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 0.01 U(D) NA

(89 feet BTOC) 05/10/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

08/23/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


02/12/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U ND NA NA NA NA NA NA NA


08/13/07 6.85 7.04 J NA 14.5 782 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 UJ 0.004 0.162 135 0.08 0.52 30.8

10/30/07 6.85 6.71 J NA 12.4 669 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.005 0.171 130 0.09 0.54 29

10/30/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.006 (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

02/04/08 6.66 7.03 J NA 12.0 766 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.116 92.4 0.077 0.35 30-3 . 02/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 (D) 0.05 U (D) 0.00) U(D) 0.01 U(D) NA

05/13/08 6.85 7.04 J 3.550 12.5 652 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.129 92.7 0.067 0.37 J+ 28.3

05/13/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA • 0.002 U(D) 0.005 U (D) 0.05 U (D) 0.00! U(D) 0.22 J+ (D) NA

08/04/08 6.49 6.94 J 2,440 14.1 891 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.004 0.149 105 0.08 0.42 29.1

08/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

11/13/08 6.80 6.96 J 1,690 12.1 649 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.108 79.6 0.038 0.33 23.6

11/13/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.0D7 (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

02/20/09 7.00 6.9 15.6 11.9 708 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.010 0.66 0.001 U 0.01 U 24.4

02/20/09 7.00 NA NA 11.9 708 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.007 (D) 0.05 U (D) 0.001 U(D) 0.01 (D) NA

05/05/09 7.20 6.76 83.6 14.8 751 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.009 125 .0.002 0.01 U 28.6

05/05/09 7.20 NA NA 14.8 751 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.009 (D) 0.05 U (D) 0.001 U(D) 0.01 (D) NA 07/26/10 6.98 NA NA 15.5 789 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 2.0 U 0.002 U 0.005 0.05 U 0.001 U 0.01 U 31.0

10/26/10 6.69 NA NA 1 1.4 615 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 31.2


05/16/11 6.75 NA 3.1 12.3 758 0.6 0.2 U 0.2 U 0.2 U 0.2 J 0.2 U 2 2 3.0 2.0 U 0.002 U 0.005 U 0.11 0.0001 U 0.01 U 24

05/16/11 • 6.75 NA 3.1 12.3 758 NA NA NA NA NA NA . NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.01 U(D) NA

07/27/1 1 6.70 NA 3.2 12.9 . 766 0.3 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.0 J+ 1.3 2.0 U 0.002 U 0.005 U 0.08 0.0001 U 0.01 U 23 07/27/1 1 6.70 NA NA 12.9 766 NA . . . NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 0.01 U(D) NA

11/01/11 6.82 NA NA 12.2 671 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U • 0.8 J+ 0.8 2.0 U 0.002 U 0.006 0.53 0.0003 0.01 U 34.3


MW06-06 (70 feet BTOC) 05/10/06 NA NA NA NA NA • 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA



02/12/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/02/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 V 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/17/11 6.81 NA I.OU 14.7 718 0.9 0.8 0.7 0.2 U 1.7 0.2 U 1.9 6.0 2.0 U 0.002 U 0.005 0.05 U 0.0001 U 0.10 28 05/17/11 6.81 NA I.OU 14.7 718 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.10(D) NA 07/24/11 6.83 NA 1.5 17.8 707 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U • ND 2.0 U 0.002 U 0.005 U 0.13 0.0001 0.33 24 07/24/11 • 6.83 NA NA 17.8 707 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.37 (D) NA

(88 feel BTOC) 05/10/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

08/23/06 7.01 6.98 J NA 16.0 NA 0 . 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.042 24.6 0.022 0.48 26.4

11/08/06 6.99 6.94 J NA 13.7 704 °0.2U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.006 0.096 66.2 0.052 0.828 25.2

02/12/07 6.91 7.01 J NA 1 1.4 741 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.004 0.097 59.5 0.082 0.63 21.9 05/02/07 6.62 6.76 NA 13.1 614 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.078 47.2 0.054 0.79 27.0 05/17/11 6.81 NA I.OU 14.7 717 0.5 1.0 0.7 0.2 U 1.8 0.2 U 2.3 6.3 2.0 U . 0.002 U 0.005 U 0.05 U O.OOOl u 0.11 28

05/17/11 6.81 NA I.OU 14.7 717 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.12(D) NA 07/24/11 6.81 NA 1.4 17.1 705 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.07 0.0001 0.30 24 07/24/1 1 • 6.81 NA NA 17.1 705 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.30 (D) NA

(105 feet BTOC) 05/10/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/23/06 NA NA NA NA NA 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 NA NA NA NA NA NA NA 11/08/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/12/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

05/02/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/14/07 6.62 6.96 NA 13.8 900 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.004 0.138 86.6 0.072 1.13 31.4

10/30/07 6.86 6.86 J NA 12.8 707 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.042 21.6 . 0.027 0.76 30.3 10/30/07 NA NA . NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 (D) 0.05 U (D) 0.001 U(D) 0.17(D) NA

4/12/3)1! Page 7 of 22 URS Corporation

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Tab le 4

Summary of Analytical Results for Monitoring and Interceptor Wells Lindsay Manufacturing, L L C Lindsay, Nebraska

Specific Organic Analyses (pg/L) Inorganic Analyses (mg/L)Water Conductivity

PH pH TSS (mg/L) Temperature (umho/cm) Total Volatile Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA l,2-DCE b 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate


Alternate Cleanup Level 1 On Property >5.0 > 5.0 NE NE NE NE NE NE NE NE NE . Nb NE NE NE 10 NE NE 500

Alternate Cleanup Level Off Pruperty >6.3 >6.3 NE NE NE NE NE NE NE NE NE N E . NE NE NE 1 NE NE 400 MW06-06 (1 OS feet BTOC) 02/04/08 6.65 6.93 J NA 12.0 891 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.067 42.9 0.048 0.63 29.3 continued 02/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.006 (D) 0.05 U (D) 0.001 U (D) 0.03 (D) NA

05/14/08 6.90 6.99 J 602 13.4 647 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.080 48.5 0.051 0.51 25.5 05/14/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.006 (D) 0.05 U (D) 0.001 U (D) 0.05 J+(D) NA 08/04/08 6.67 6.99 J 353 14.1 841 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.065 38.6 0.055 0.65 27.1 08/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U (D) 0.19(D) NA 11/13/08 6.82 6.85 J III 12.9 672 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.025 24.4 0.013 0.26 24.9 11/13/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.006(D) 0.05 U (D) 0.001 U(D) 0.07 (D) NA 02/20/09 6.90 6.89 48.0 12.2 729 0.6 C.2U 0.2 U 0.2 U 1.0 0.2 U 0.6 2 2 2.0 U 0.002 U 0.008 0.12 0.001 U 0.09 27.8 02/20/09 6.90 NA NA 12.2 729 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.006(D) 0.05 U (D) 0.001 U(D) 0.14(D) NA 05/07/09 7.20 6.78 I.OU 14.2 749 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 0.05 U 0.001 U 0.20 31.3 05/07/09 7.20 NA NA 14.2 749 NA NA NA NA NA NA NA NA NA 0.002 U (Dl 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.24(D) NA 07/26/10 6.95 NA NA 15.2 799 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.20 33.5 10/28/10 6.41 NA NA 11.8 662 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.9 2.3 2.0 U 0.002 U 0.005 U 0.08 0.001 U 0.11 33.6 J 02/13/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 NA NA NA NA NA NA NA 05/17/11 6.85 NA 1.9 15.1 718 1.0 0.9 0.7 0.2 U 1.8 02 U 2.4 6.8 2.0 U 0.002 U 0.005 U 0.06 0.0001 U 0.10 28 05/17/11 6.85 NA 1.9 15.1 718 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.11 (D) NA 07/24/11 6.84 NA 2.1 16.0 719 0.2 U 0.2 U 0.2 U 0.2'U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.08 0.0001.U 0.23 25 07/24/11 6.84 NA NA 16.0 719 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D.) 0.19(D) NA 10/30/11 6.83 NA NA 122 701 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 J+ 0.3 2.0 U 0.002 U 0.005 U 0.12 0.0001 0.12 37.8 02/01/12 . NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 NA NA NA NA NA • NA NA

MW06-07 (62 feci BTOC) 05/10/06 NA NA NA NA NA 0.6 0.4 0.2 0.2 U 0.8 0.2 U 0.8 2.8 NA NA NA NA NA NA NA 08/22/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/08/06 NA NA NA NA NA 2.0 3.4 0.3 0.2 U 1.3 0.2 U 4.4 II NA NA NA NA NA NA NA 02/12/07 NA NA NA NA NA 0.2 U 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U 0.8 0.8 NA NA NA NA NA NA NA 05/02/07 NA NA NA NA NA 0.3 0.2 0.2 U 0.2 U 0.3 0.2 U 0.4 1.2 NA NA NA NA NA NA NA 05/18/11 6.39 NA 1.4 13.3 761 3.2 2.4 0.8 0.2 U 2.5 0.6 12 22 2.S 0.002 U 0.005 U 0.09 0.0001 U 0.41 NA 05/18/11 6.39 NA 1.4 13.3 761 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.41 (D) NA 07/25/11 6.53 NA 3.3 IS.5 742 6.2 J+ 4.4 2.5 '0.2 U 8.9 J+ 0.3 8.7 J+ 31 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.82 68 07/25/11 6.53 • NA NA 15.5 742 NA NA NA NA NA NA NA NA NA 0.002 U(D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.73 (D) NA

(86 feel BTOC) O5/IO/06 NA NA NA NA NA 0.7 0.4 0.2 U • 0.2 U 0.7 0.2 U 0.8 2.6 NA NA NA NA NA NA NA 08/22/06 6.62 6.89 J NA 15.9 NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.044 24.8 0.015 1.29 33 11/08/06 6.90 6.90 J NA 14.4 758 2 2 4.0 0.3 0.2 U 1.5 0.2 U 6.2 14 2.0 U 0.005 0.113 •4.5 0.042 2.00 43.6 02/12/07 6.76 6.90 J NA 11.6 722 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 0.2 2.0 U 0.003 0.088 66.8 0.048 1.47 42.1 05/02/07 6.51 6.77 NA 14.1 611 0.4 0.3 0.2 U 0.2 U 0.5 0.2 U 0.5 1.7 2.0 U 0.002 U 0.047 38.1 0.024 1.20 34.5 08/14/07 6.74 6.91 NA 13.9 833 0.2 U • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.003 0.129 90.3 0.047 2.89 32 10/30/07 6.74 7.09 J NA 12.9 667 0.2 U 0.2 U .0 .2U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 0.074 52 0.038 1.84 31.5 10/30/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 UJ (D) 0.52(D) NA 02/07/08 6.69 6.88 NA 12.6 746 0.2 .0.2 0.2 U 0.2 U 0.2 U 02 U 0.7 1.1 2.0 U 0.002 U 0.042 33.6 0.026 0.84 38.9 • 02/07/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 0.22(D) NA 05/14/08 6.69 6.86 J 572 . 13.5 693 2.5 2 2 1.2 0.2 U 5.2 0.2 5.4 17 4.1 0.002 U 0.026 19.5 • 0.016 0.82 73.0 05/14/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 0.46 (D) NA 08/04/08 6.6S 7.07 J 302 14.6 860 0.4 0.5 0.2 U 0.2 U 1.0 0.2 U I.I 3.0 2.0 U 0.002 U 0.031 21.3 0.018 , 1.15 32.4 08/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 0.54(D) NA 11/13/08 6.78 6.89 205 13.4 691 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 9.2 0.002 U 0.020 12.4 0.005 0.60 34.6 11/13/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.32(D) NA 02/19/09 6.90 6.73 24.6 13.1 778 13 9.1 4.1 0.2 U 18 I.I 68 113 15 0.002 U 0.005 0.83 0.001 U 0.32 57.3 02/19/09 6.90 NA NA 13.1 778 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.35 (D) NA 05/05/09 6.90 6.36 5.1 14.6 863 26 9.2 3.9 0.2 U 32 0.7 34 106 6.3 0.002 U 0.005 U 0.25 0.001 U 0.49 133 05/05/09 6.90 NA NA 14.6 863 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.49 (D) NA 07/28/10 • 6.69 • NA NA 15.3 776 2.6 2.3 1.5 ; 0.2 U 4.6 0.2 7.0 18 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.60 53.8 10/26/10 6.65 NA NA 12.7 726 7.6 7.1 3.1 1 0.2 U 5.1 2.4 150 175 17 0.002 U 0.005 U 0.05 U 0.001 U 0.51 81.0 02/13/11 NA NA NA NA NA 5.0 5.2 2.0 0.2 U 6.0 1.3 35 55 NA NA NA NA NA NA NA 05/18/11 6.45 NA 3.6 13.3 773 3.9 3.0 0.9 . 0.2 U 2.8 0.8 16 27 3.7 J 0.002 U 0.005 U 0.18 0.0002 0.41 NA 05/18/11 6.45 NA 3.6 13.3 773 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.44 (D) NA 07/25/11 6.51 NA 3.5 14.9 781 6.9 J+ 4.8 2.7 0.2 U 9.8 1+ 0.4 11 J+ 36 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.77 71 07/25/11 6.51 NA NA 14.9 781 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.76(D) NA 10/31/11 6.19 NA NA 13 8 809 17 19 7.0 0.2 U 15 5.4 160 J 223 20 0.002 U 0.005 U 0.19 0.0001 • 0.55 111 02/01/12 NA NA NA NA NA 12 12 3.8 0.2 U 9.6 4.9 120 162 NA NA NA NA NA NA NA

K:W05U.INDSAYO0l2tf DdnrnbleiYO 1 Foil ReponiNApnl BuanuiATililKVT»hle 4-Mornlonnj Weill lonuonni wcUil 4/12/io L Page 8 o(22 URS Corporation

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Specific Organic Analyses (u A) j .

Inorganic Analyses (mg/L) Water Conductivity

pH PH TSS (mg/L) Temperature (umho/cm) h

Total Volatile

Well Identification Date Collected (field) (lab) (lab) CO (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3d 0.O5 . 5.0d 250d

Alternate Cleanup Level 1 On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level * Off Property 2.6-3 2 6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

MW06-07 (107 feet BTOC) 05/10/06 NA NA NA NA NA 2.2 1.8 0.5 0.2 U 3.4 0.2 U 2.1 10 NA NA NA NA NA NA NA

continued 08/22/06 NA NA NA NA NA 0.3 0.3 0.2 U 0.2 U 0.7 0.2 U 0.6 1.9 NA NA NA NA NA NA NA

11/08/06 NA NA NA NA NA 0.4 0.7 0.2 U 0.2 U 0.3 0.2 U 1.2 2.6 NA NA NA NA NA NA NA

02/12/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA

05/02/07 NA NA NA NA NA 0.8 0.6 0.2 0.2 U 1.1 0.2 U 0.9 3.6 NA NA NA NA NA NA NA

05/18/11 6.50 NA 12.7 13.7 788 4.0 3.2 0.9 0.2 U 2.6 0.9 16 28 3.3 0.002 U 0.005 U 0.27 0.0002 0.47 NA

05/18/11 6.50 NA 12.7 13.7 788 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0 005 U (D) 0.05 U(D) 0.0001 U(D). 0.47 (D) NA

07/25/11 6.51 NA I.OU 14.8 749 3.9 J+ 2.5 1.4 0.2 U 5.6 J+ 0.2 6.8 J+ 20 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.83 59

07/25/11 6.51 NA NA 14.8 749 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.87(D) NA

MW06-08 (79 feci BTOC) 05/09/06 6.80 NA NA 18.8 118 63 34 18 0.7 68 3.6 120 307 NA NA NA NA NA NA NA

08/22/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.6 1.0 NA NA NA i NA NA NA NA

11/09/06 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.3 0.2 U 1.7 2.0 NA NA NA NA NA NA NA

02/19/07 NA NA NA NA NA 1.5 1.0 0.8 0.2 U 2.5 0.2 U 2.7 8.5 NA NA NA NA NA NA NA

05/03/07 NA NA NA NA NA 13 II 5.3 0.2 U 22 0.6 15 66.9 NA NA NA NA NA NA NA

06/01/11 6.26 NA 1.7 13.7 658 0.3 0.2 U 02 U 02 U 0.5 02 U 1.2 2.0 2.0 U 0.002 U • 0.005 U . 0.13 0.0001 U 0.85 27

06/01/11 6.26 NA 1.7 13.7 658 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.85 (D) NA

06/1/11 (DUP) 6.26 NA 1.7 13.7 658 0.3 0.2 U 0.2 U 0.2 U 0.5 0.2 U 1.3 2.1 2.0 U 0.002 U 0.005 U 0.08 0.0001 U 0.88 27

06/1/11 (DUP) 6.26 NA 1.7 13.7 658 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U(D) 0.05 U (D) 0.0001 U (D) 0.85 (D) NA

07/26/11 6.52 NA 16.2 J 14.9 745 3.9 J+ 2.0 1.0 0.2 U 4.7 J+ 0.2 U 5.6 J+ 17 2.0 U 0.002 U 0.005 U 0.54 0.0003 1.05 78

07/26/11 6.52 NA NA 14.9 745 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 1.06 (D) NA

07/26/11 (DUP) 6.52 NA 29.2 J 14.9 745 3.9 J+ 1.9 1.0 0.2 U 4.7 J 0.2 U 5.4 J+ 17 2.0 U 0.002 U 0.005 U 0.58 0.0003 1.05 81

07/26/11 (DUP) 6.52 NA NA 14.9 745 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 1.04 (D) NA

(95 feet BTOC) 05/09/06 6.80 NA NA 18.8 118 46 32 11 0.6 87 2.4 64 253 NA NA • NA NA NA NA NA

05/09/06 (DUP) 6.80 NA NA 18.8 118 47 37 21 0.4 96 2.2 62 266 NA NA NA NA NA NA NA

08/22/06 6.85 6.66 J NA 14.3 NA 0.2 U 0.2 U • 0.2 U 0.2 U 0.4 0.2 U 0.4 0.8 2.0 U 0.003 0.036 26.8 0.015 3.38 31.8

08/22/06 (DUP) 6.85 6.72 J NA 14.3 NA 0.2 U 02 U 0.2 U 0.2 U 0.2 0.2 U 0.2 0.4 2.0 U 0.002 0.027 20.1 0.011 2.67 32.1

11/09/06 6.72 6.73 • NA 12.3 680 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 02 0.2 2.0 U 0.010 0.100 77.8 0.039 8.66 28.1

11/9/06 (DUP) 6.72 6.78 NA 12.3 680 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 2.0 U 0.011 0.110 84.2 0.040 8.99 28.1

02/19/07 6.81 6.97 J NA 12.1 734 2 2 1.4 1.0 0.2 U 3.6 0.2 U 3.1 II 2.0 U 0.005 0.053 40.2 0.031 5.08 44.2

02/19/07 (DUP) NA NA NA NA NA 2.1 1.4 1.0 0.2 U 3.6 02 U 3.0 11 2.0 U 0.005 0.077 59.6 0.044 5.57 44.0

05/03/07 6.46 6.65 NA 13.4 717 IS 13 5.8 0.2 U 26 0.7 22 83 5.0 0.002 0.047 33.7 J 0.018 2.99 J 111

05/3/07 (DUP) NA NA NA NA NA 12 II 5.1 0.2 J 0.7 20 71 5.0 0.002 U 0.041 19.9 J 0.021 0.39 J 112

06/01/11 6.50 NA T ^ 14.2 661 . 0.3 0.2 U 0.2 U 0.2 U 0.4 0.2 U 1.1 1.8 2.0 U 0.002 U 0.005 U 0.14 0.0001 U 0.85 29

06/01/11 6.50 NA 2 2 14.2 661 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.85 (D) NA

07/26/11 6.46 NA 10.2 15.3 732 4.1 2.1 1.0 0.2 U 5.0 J+ 0.2 U 6.3 J+ 19 2.0 U 0.002 U 0.005 U 0.40 0.0002 1.08 77

07/26/11 6.46 NA NA 15.3 732 NA NA NA .NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 1.06(D) NA

(114 feet BTOC) 05/09/06 6.80 NA NA 18.8 118 44 32 20 0.6 86 2.4 65 250 NA NA NA NA NA NA NA

08/22/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.5 0.9 NA NA NA NA NA NA NA

11/09/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 0.2 U 0.3 0.5 NA NA NA NA NA NA NA

02/19/07 NA NA NA NA NA 2.3 1.4 1.1 0.2 U 3.8 0.2 U 2.8 11 NA NA NA NA NA NA NA

05/03/07 NA NA NA NA NA 8.7 J 9.3 J 3.8 J 0.2 U 16 J 0.5 J 16 54 NA NA NA NA NA NA NA

08/14/07 6.78 6.92 NA 14.8 806 0.2 U 02 U 0.2 U 0.2 U 0.3 0.2 U 0.4 0.7 2.0 U 0.011 0.077 55.9 0.03 10.5 33

08/14/07 . NA NA NA NA NA NA NA NA NA • NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.050 U (D) 0.001 U(D) 0.53 (D) NA

08/14/07 (DUP) 6.78 6.88 NA 14.8 806 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.4 0.7 2.0 U 0.009 0.061 44.8 0.024 8.77 32.7 10/31/07 6.74 6.97 J NA 12.9 634 0.2 U 0.2 U 0.2 IJ 0.2 U 0.2 0.2 U 0.2 0.4 2.0 U 0.008 0.071 52 0.029 8.91 28.9 10/31/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.79 (D) NA

10/31/07 (DUP) 6.74 6.88 J NA 12.9 634 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 02 0.4 2.0 U 0.D06 0.O65 47 0.026 7.15 29.3 10/31/07 (DUP) NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.82(D) NA

02/06/08 6.57 6.8 NA 12.5 606 8.5 6.2 3.8 0.6 U 18 0.6 U 13 50 2 | 0.003 0.045 34.7 0.020 3.78 69.5

02/06/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.03 (D) NA

02/6/08 (DUP) 6.57 6.75 NA 12.5 606 8.1 6.4 3.9 0.6 U 18 0.6 U 15 51 2.1 0.002 0.033 26.4 0.015 3.32 60.7

02/6/08 (DUP) NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.01 (D) NA

05/14/08 6.27 6.64 J 360 J 12.5 838 47 23 12 0.4 82 1.3 68 234 14 0.002 U 0.038 27.0 0.018 3.71 226

05/14/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 1.78(D) NA

05/14/08 (DUP) . 6.27 6.80 J 1,070 J 12.5 838 44 24 13 0.4 74 1.5 62 219 13 0.002 U 0.048 34.2 0.021 4.29 241

05/14/08 (DUP) NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.63(D) NA

08/05/08 6.63 6.77 452 13.4 872 • 2.6 J 4.7 2.0 0.2 U 9.4 J 0.3 17 36 2.0 U 0.002 U 0.024 17.0 0.012 2.04 23.3 J

08/05/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.13(D) NA

08/05/08 (DUP) 6.63 6.66 424 13.4 872 5.0 J 6.9 2.7 0.2 U 16 J 0.4 23 54 2.0 U 0.002 U 0.029 19.3 0.014 2.27 64.6 J

08/05/08 (DUP) NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.28 (D) NA

11/13/08 • 6.70 6.83 918 13.2 669 2.1 1.9 1.3 0.2 U 4.2 0.2 U •3.3 13 2.0 U 0.003 0.060 42.0 0.014 4.67 40.9

11/13/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.88 (D) NA

11/13/08 (DUP) 6.70 6.81 918 13.2 669 2.1 2.0 1.3 0.2 U 4.4 0.2 U 3.4 13 2.0 U 0.002 0.047 31.8 0.016 3.83 40.0

11/13/08 (DUP) NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D l 0.05 U (D) 0.001 U(D) 0.79(D) NA

t.U»5\LINDSA'l\20l2\9 DelivCTabtei'S I Fuul RcpjnAApn] Bomiinr.Tablei'.Tibie 4-Moni[onn[ Welti (Uonaonnj »eUi, 4.'] 2/3)12 Page 9 of 22 URS Corporation

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Table 4

Summary of Analy t ica l Results for Mon i to r i ng and Interceptor Wells


L indsay , Nebraska

Specific Organic Analyses (pg/L) Inorganic Analyses (mg/L)

Water Conductivity pH pH TSS (mg/L) Temperature (umbo/cm) Total Volatile

Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Orgaoics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate


Alternate Cleanup Level * On Property 2 5.0 2 5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level 1 Off Property >6.3 > 6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400 MW06-08 (114 feet BTOC) 02/19/09 6.53 6.45 2.9 13.8 746 10 6.4 3.2 0.2 U 18 0.4 17 55 4.2 0.002 U 0.005 U 0.13 0.001 U 1.18 127 continued 02/19/09 6.53 NA NA 13.8 746 NA NA NA NA NA NA NA NA NA • 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.17(D) NA

02/19/09 (DUP) 6.53 6.43 2.6 13.8 746 9.7 6.1 3.1 0.2 U 17 0.5 17 53 3.9 0.002 U 0.005 U 0.13 0.001 U 1.18 136 02/19/09 (DUP) 6.53 NA NA 13.8 746 NA NA NA NA NA NA NA NA . NA 0.002 U(D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.19(D) NA 05/07/09 6.70 6.45 2.3 14.4 694 4.2 2.1 0.9 0.2 U 7.3 0.2 U 6.8 21 2.0 U 0.002 U 0.005 U 0.06 0.001 U 1.15 88.9 05/07/09 6.70 NA NA 14.4 694 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U (D) 122(D) NA 05/7/09 (DUP) 6.70 6.40 2.0 14.4 694 4.1 2.1 0.8 0.2 U 7.0 0.2 U 6.6. 21 2.0 U 0.002 U 0.005 U 0.06 0.001 U 1.09 88.9 05/7/09 (DUP) 6.70 NA NA 14.4 694 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.19(D) NA 07/27/10 6.52 NA NA 15.1 624 1.0 0.6 0.3 0.2 U 1.6 0.2 U 2.2 5.7 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 1.05 53.6 10/27/10 6.57 NA NA 12.4 771 4.3 3.3 1.7 0.2 U 5.8 0.4 . 12 28 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.90 77.7 10/27/10 (DUP) 6.57 NA NA 12.4 771 4.8 3.8 1.8 0.2 U 6.5 0.3 11 28 2.4 0.002 U 0.005 U 0.05 U 0.001 u 0.89 75.5 02/13/11 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U 1.4 0.2 U 3.5 5.5 NA NA NA NA NA NA NA 06/01/11 6.52 NA 4.0 14.6 654 0.2 0.2 U 0.2 U 0.2 U 0.4 0.2 U I.I 1.7 2.0 U 0.002 U 0.005 U 0.21 0.0001 0.84 29 06/01/11 6.52 NA 4.0 14.6 654 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.41 (D) 0.0001 U(D) 0.86 (D) NA 07/26/11 • 646 NA I.I 15.4 740 4.4 J+ 2.1 0.9 0.2 U 4.9 J+ 0.2 U 5.8 J+ 18 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.99 82 07/26/11 6.46 NA NA 15.4 740 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0 005 U (D) 0.05 U (D) 0.0001 U (D) 1.07 (D) NA 11/01/11 6.46 NA NA 13.7 703 4.6 2.8 1.4 0.2 U 5.8 0.2 8.5 23 2.0 U 0.002 U 0.005 U 0.18 0.0001 U 1.06 73.5 11/01/11 (DUP) 6.46 NA NA 13.7 703 4.5 2.8 1.3 0.2 U 5.7 0.2 8.5 23 2.0 U 0.002 U 0.005 U 0.17 0.0001 u 1.06 72.5 02/01/12 NA NA NA NA NA 0.5 0.2 0.2 U 0.2 U 1.2 0.2 U 3.4 5.3 NA NA NA NA NA NA NA

MW06-09 (100 feet BTOC) 05/08/06 6.79 NA NA 15.3 609 0.5 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.7 NA NA NA NA NA NA NA 08/24/06 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/09/06 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.7 NA NA NA NA NA NA NA 02/20/07 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.6 1.2 NA NA NA NA NA NA NA 05/03/07 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 I.I NA NA NA NA NA NA NA 05/26/11 6.57 NA 28 13.9 580 02 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.4 0.4 •'2.0 U 0.002 U 0.005 U 0.28 0.0002 1.04 21 05/26/11 6.57 NA 2.8 13.9 580 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 1.03 (D) NA 07/31/11 6.32 NA 1.2 16.6 578 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.006 • 0.05 U 0.0001 U 0.19 15 07/31/11 6.32 NA NA 16.6 . 578 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005(D) . 0.05 U (D) 0.0001 U (D) 0.19(D) NA

(124 feet BTOC) 05/08/06 6.79 NA NA 15.3 609 0.8 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 1.2 NA NA NA NA NA NA NA 08/24/06 6.70 6.85 NA 14.3 82 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.4 2.0 U 0.002 U 0.019 16.3 0.008 0286 39.4 11/09/06 6.56 6.72 NA 10.9 497 0.5 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 1.0 2.0 U 0.004 0.052 49.0 0.025 3.81 61.7 02/20/07 6.81 6.69 NA 10.6 498 0.7 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.8 1.7 2.0 U 0.013 0.043 37.1 0.025 10.7 64.7 05/03/07 6.69 6.83 NA 11.7 528 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 2.0 U 0.004 0.049 36.5 0.024 3.34 21.0 05/26/11 6.69 NA 4.7 13.9 584 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.4 2.0 U 0.002 U 0.005 U 0.39 0.0002 1.05 20 05/26/11 6.69 NA 4.7 13.9 584 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U (D) 0.93 (D) NA 07/31/11 5.92 NA 1.6 16.5 569 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND 2.0 U 0.002 U 0.006 0.05 U 0.0001 U 028 15 07/31/11 5.92 NA NA 16.5 569 NA NA NA NA NA NA NA NA NA • 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.20 (D) NA

(144 feel BTOC) 05/08/06 6.79 NA NA 15.3 609 0.8 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 1.3 NA NA NA NA NA NA NA 08/24/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/09/06 NA NA NA NA NA 0.6 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.6 1.2 NA NA NA NA NA NA NA 02/20/07 NA NA NA NA NA 0.8 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.8 1.6 NA NA NA NA NA NA NA 05/03/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/15/07 6.63 6.71 J NA 12.6 568 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 0.054 52.3 0.023 2.45 35.6 10/31/07 6.63 6.76 J NA 11.3 480 . 0.5 0.2 U 02 U 0.2 U 0.2 U .02 U 0.6 I.I 2.0 U 0.003 0.066 59.7 0.021 3.5 58.3 10/31/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.6(D) NA 02/06/08 6.54 6.78 J NA 1 I.I 458 1.2 0.2 U 0.2 U 0.2 U 0.3 02 U 1.2 2.7 2.0 U 0.006 0.038 33.6 0.020 5.29 60.4 02/06/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.4(D) NA 05/14/08 6.43 6.67 J 388 11.2 453 0.9 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.7 1.8 2.0 U 0.008 0.018 12.3 0.009 4.96 52.6 05/14/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.28(D) NA 08/05/08 6.85 6.90 177 11.8 635 0.2 U 0.2 U 02 U 0.2 U 02 U 0.2 U 0.2 ND 2.0 U . 0.007 0.025 16.0 0.011 4.66 26.4 08/05/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 (D) 0.05 U (D) 0.001 U (D) 0.39 (D) NA 11/14/08 6.60 6.73 183 II.1 494 0.8 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.7 1.5 2.0 U 0.007 0.014 10.2 0.008 5.40 38.7 11/14/08 NA NA NA NA NA • /NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 1.47(D) NA 02/19/09 6.90 6.72 5 1 12.3 542 0.8 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.7 1.5 2.0 U 0.002 U 0.005 U 0.32 . 0.001 U 1.19 38.4 02/19/09 6.90 NA NA 12.3 542 NA NA NA NA NA NA NA NA . NA 0.002 U (D) 0.005 U (D) 0.0S U (D) 0.001 U(D) 1.1(D) NA 05/07/09 7.20 6.89 I.OU 12.6 578 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.7 2.0 U 0.002 U 0.0O5 U 0.05 U O.OOl U 0.56 22.3 05/07/09 7.20 NA NA 12.6 578 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.50(D) NA

07/28/10 6.83 NA NA 13.5 599 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.07 0.001 u 0.53 24.6 10/25/10 6.70 NA NA 12.5 571 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.11 0.001 u 0.89 27.6

K mXJ\UNDSAY\20i:is Deb vera t i f f s . I Fina RfponiUpnJ BODDuaiVT aolaVr.bJj:4-itoutora WEDJ(Momioro vrtlt)


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Table 4

Summary of Ana ly t ica l Results for Moni tor ing and Interceptor Wells

L indsay Manu fac tu r ing , L L C

L indsay, Nebraska

Specific Organic Analyses (u A-) Inorganic Analyses (mg/L)

Water Conductivity pH pH TSS (mg/L) Temperature (p mho/cm) Total Volatile

Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate


Alternate Cleanup Level 1 On Property 2 5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level Off Property 26.3 2 6.3 NE NE • NE NE NE NE NE NE N E NE NE NE NE 1 NE NE 400

MW06-09 (144 feet BTOC) 02/13/11 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.7 NA NA NA NA NA NA NA

continued 05/26/11 6.69 NA 6.1 13.4 581 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 2.0 U 0.002 U 0.007 0.51 0.0002 0.99 19

05/26/11 6.69 NA 6.1 13.4 581 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0001 U(D) 0.92(D) NA

07/31/11 5.38 NA 4.4 15.8 568 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.007 0.09 0.0001 U 0.23 15

07/31/11 5.38 NA NA 15.8 568 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.0030 (D) 023 (D) NA

10/30/11 6.84 NA NA 11.8 491 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U o.oos 1.41 0.0002 0.94 30.0

02/01/12 NA NA NA NA NA 0.3 02 U 02 U 0.2 U 0.2 U 02 U 0.4 0.7 NA NA NA NA NA NA NA

Downgradient of Facility

T l Well 08/03 Diffusion 150'to 152 NA NA NA NA NA I.OU I.OU 1.0 U I.OU 1.0U I.OU I.OU ND NA NA NA NA NA NA NA

08/03 Diffusion 165'to 167 NA NA NA NA NA I.OU I.OU I.OU 1.0U I.OU 1.0U 1.0 u ND NA NA NA NA NA NA NA

08/03 Diffusion 180'to 182 NA NA NA NA NA 1.0U I.OU 1.0U I.OU 1.0U I.OU I.OU ND NA NA NA NA NA NA NA

8/04 6.99 NA NA 11.4 543 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 02 U ND NA NA NA NA NA NA NA

11/09/04 7.02 NA NA 11.2 484 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA

02/22/05 7.10 NA NA 11.3 452 0.2 U 02 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA "NA NA NA

05/03/05 7.02 NA NA 11.2 727 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA





08/19/06 6.88 NA NA 11.2 551 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 NA NA NA NA NA NA NA


02/20/07 6.88 NA NA 11.2 468 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA





08/07/08 6.60 NA NA 113 568 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

11/16/08 6.87 NA NA 11.5 589 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

02/24/09 6.50 NA NA 113 464 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

08/16/10 7.11 NA NA 11.5 586 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ ND NA NA NA NA NA NA NA

1 1/02/10 6.77 NA NA 11.4 502 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

02/15/11 6.89 NA NA 11.4 454 02 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


10/27/11 7.14 NA NA 11.5 539 02 U • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW89-10B 2/03 6.91 NA NA 12.1 474 S.OU 5.0 U 5.0 U 5.0 U 5.0 U S.OU 5.0 U ND NA NA NA NA NA NA NA

8/03 6.75 NA NA 14.8 490 I.OU I.OU I.OU 1.0U I.OU 1.0U I.OU ND NA NA NA NA NA NA NA

8/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

11/08/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


05/01/05 NA NA NA NA NA 0.2 U 0.2 V 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 NA NA NA NA NA NA NA

08/02/05 NA NA NA NA NA . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


01/29/06 NA NA NA NA NA 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

05/07/06 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

08/19/06 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA . NA NA NA NA




08/12/07 NA NA NA NA NA 02 U 0.2 U 0.2 U . 0.2 U , 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA





11/18/08 NA NA NA NA . NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U ND NA NA NA NA NA NA NA



07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA





10/26/11 NA NA NA NA NA 0.2 U . 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


K WJOJU.[NDSAW201 TS Deliverable's.I Fa i RfprjfU\A>n BLuauiMibk*Tib lc 4-i louton3| W«ai(»lrMttoriE| wtilt) Page 11 of 22 URS Corporation

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Table 4 Summary of Analytical Results for Monitoring and Interceptor Wells Lindsay Manufacturing, L L C Lindsay, Ntbraska


Water Conductivity pH ptl TSS (mg/L) Temperature (pmho/cm) Total Volatile

Well Identification Pate Collected (field) (I"b) (lab) C O (field) (field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxaoe Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0 250d

Alternate Cleanup Level On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE . NE NE NE 10 NE NE 500

Alternate Cleanup Level - O f f Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

MW89-11B 12/02 NA NA NA NA NA I.OU I.OU I.OU 1.0 U I.OU I.OU 1.4 1.4 NA NA NA NA NA NA NA 2/03 6.85 NA NA 10.4 654 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U S.OU S.OU ND NA NA NA NA NA NA NA 8/03 6.90 NA NA 13.1 682 1.0U I.OU 1.0U 1.0U I.OU I.OU 1.0 1.0 NA NA NA NA NA NA NA 8/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/08/04 NA NA NA NA NA 0.2 U 0.2'u 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/21/05 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.4 0.4 NA NA NA NA NA NA NA 05/01/05 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/02/05 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 0.2 NA NA NA NA NA NA NA 11/06/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U D.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 01/29/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/07/06 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/19/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.3 0.3 NA NA NA NA NA NA NA 11/05/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/10/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA 04/29/07 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA . NA NA NA NA 08/12/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/28/07 NA NA NA NA . NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/0S/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/11/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/05/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/18/08 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA , NA NA NA NA NA 02/18/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/06/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U . 0.2 U 0.2 U ND NA • NA • NA NA NA NA NA 10/31/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/02/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.2 0.4 NA NA NA NA NA NA NA 07/31/11 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 0.2 U 0.3 0.5 NA NA NA .NA NA NA NA 10/26/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA • NA NA NA NA NA 01/31/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 NA NA NA NA NA NA NA

MW92-3A 11/01 6.75 6.9 J NA 11.7 569 12 5.0 U 5.0 U 5.0 U 100 5.0 U 42 154 NA 0.002 U 0.102 3.63 0.002 0.030 26 2/02 6.79 NA NA 10.6 568 16 5.0 U S.OU 5.0 U 110 5.0 U 48 174 NA NA NA NA NA NA NA 5/02 6.77 8.0 J NA 12.2 459 S.OU 5.0 U S.OU S.OU 97 5.0 U 42 139 NA 0.002 U 0.190 J 1.92 0.001 U 0.016 I9J 8/02 6.58 NA NA 12.0 547 10 5.0 U 5.0 U 5.0 U 77 J 5.0 U 23 110 NA N A NA NA NA NA NA 11/02 6.69 6.92 J NA 1 1.4 497 6.0 5.0 U 5.0 U 5.0 U 63 S.OU 28 97 NA 0.002 U 0.085 1.98 0.001 U 0.007 17 2/03 6.68 NA NA 10.6 505 5.0 5.0 U 5.0 U S.OU 65 5.0 U 29 99 NA NA NA NA NA NA NA 5/03 6.73 6.98 J NA 11.6 448 13 5.0 U 5.0 U 5.0 U 81 5.0 U 37 131 NA 0.002 U 0.151 3.11 0.002 0.02 U 15 8/03 6.68 NA NA 13.3 487 3.7 1.9 I.OU I.OU 53 1.0U 24 83 NA NA NA NA NA NA NA 11/03 6.71 6.98 NA 1 1.7 501 2.2 1.8 1.0U I.OU 44 I.OU 22 70 NA 0.002 U 0.176 2.93 0.002 J 0.013 14 2/04 6.40 NA NA 10.6 486 6.2 1.9 I.OU I.OU 54 I.OU 26 88 NA NA NA NA NA NA NA 5/04 6.65 7.02 J NA 13.1 523 3.8 1.9 I.OU I.OU 50 I.OU 22 78 NA 0.002 U 0.279 7.61 0.005 0.029 14.8 8/04 NA NA NA NA NA 14 0.8 02 U 0.2 U 24 02 U 4.4 43 NA NA NA NA NA NA NA 11/09/04 6.82 6.95 1 NA 11.6 484 2.7 1.4 0.5 0.2 U 27 0.2 18 so NA 0.002 U 0.101 1.56 0.001 U 0.016 15.7 02/22/05 NA NA NA NA NA 14 0.6 0.6 U 0.6 U 14 0.6 U 5.4 34 NA NA NA NA NA NA NA 05/03/05 6.82 6.95 J NA 11.9 709 7.4 1.0 U I.OU I.OU IS I.OU 3.3 26 NA 0.002 U 0.223 4.21 0.003 0.017 14.7

08/02/05 NA NA NA NA NA 6.8 0.6 0.2 U 0.2 U 13 0.2 U 3.7 24 NA NA NA NA NA NA NA 11/08/05 6.88 7.12 NA 11.6 530 4.5 0.3 0.2 U 0.2 U • 5.1 0.2 U 1.5 II NA 0.002 U 0.158 2.71 0.002 0.015 U 17.6 01/29/06 NA NA NA NA NA 11 0.7 0.2 0.2 U 16 0.2 U 6.0 34 NA NA NA NA NA NA NA 05/07/06 6.82 7.01 J NA 12.1 554 8.9 0.6 0.2 U 0.2 U 14 0.2 U 5.9 29 NA 0.002 U 0.154 2.40 0.003 0.019 14.9 J 08/19/06 NA NA NA NA NA 5 6 0.4 0.2 U 0.2 U II 0.2 U 5.7 23 NA NA NA NA NA NA NA 11/06/06 NA NA NA NA NA 6.6 0.4 0.2 U 0.2 U 7.7 0.2 U 32 18 NA NA NA NA NA NA NA 02/10/07 NA NA NA NA NA 6.9 0.4 0.2 U 0.2 U 9.3 0.2 U 4.4 21 NA NA NA NA NA NA NA 05/01/07 6.73 6.84 J NA 11.8 508 8.1 0.6 0.2 U 0.2 U 9.4 0.2 U 4.2 22 NA . 0.002 U 0.206 3.75 0.003 0.03 J+ 17.0 08/15/07 NA NA NA NA NA 1.3 0.2 0.2 U 0.2 U 5.3 0.2 U 4.1 11 NA NA NA NA NA NA NA 10/28/07 NA NA NA NA NA 0.2 0.2 U 0.2 U 0.2 U 0.2 0.2 U 02 0.6 NA NA NA NA NA NA NA 02/04/08 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.2 0.8 NA NA NA NA NA NA NA 05/13/08 6.88 7.12J NA 11.7 '510 0.8 0.2 U 0.2 U 0.2 U 0.5 0.2 U 0.5 * 1.8 2.0 U 0.002 U 0.079 1.27 0.002 0.04 Jf 20.6 08/07/08 NA NA NA NA NA 2.6 0.2 U 0.2 U 0.2 U 3.3 0.2 U 1.4 7.3 NA NA NA NA NA NA NA 11/18/08 7.03 7.04 NA 10.7 675 0.2 02 U 0.2 U 0.2 U 0.3 0.2 U 0.5 1.0 2.0 U 0.002 U 0.078 2.57 0.001 U 0.01 22.3 02/17/09 7.90 7.06 NA 10.3 705 1.5 0.2 U 0.2 U 0.2 U 1.5 0.2 U 0.6 3.6 2.0 U 0.002 U 0.061 1.69 0.001 0.01 U 24.4 05/05/09 7.20 7.02 NA 1 1.8 706 1.3 0.2 U 0.2 U 0.2 U 1.4 0.2 U 0.3 3.0 2.0 U 0.002 U 0.060 0.74 0.002 0.01 u 19.6

K . W J a i l T O A > ^ l 2 W _ L > l ) ^ b l « \ 9 1 Fmtl RfpxUVApri] BintmuJ\T»bLti\T»bk 4.Lloturrxini WdUtMosaoru^ tells) 4712/201: Page 12 of 22 URS Corporation

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Tab le 4

S u m m a r y of Analyt ica Results for Mon i to r ing and Interceptor Wells


L i n d s a y , Nebraska

Specific Orga nic Analyses (p !/L> Inorganic Analyses (mg/L)

Water Conductivity pH pH TSS (mg/L) Temperature (p mho/cm) Total Volatile

Well Identification Date Collected • (field) (lab) llab) C O (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 14-DCA 1,1,1-TCA TCE PCE Orgaoics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA MCL NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3d 0.05 5.0d 250d

Alternate Cleanup Level * On Property >5.0 > 5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level * Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400 MW92-3A 07/27/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.007 0.15 0.001 U 0.02 17.5 continued 10/27/10 726 NA NA 11.0 622 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.007 0.20 0.001 U 0.06 15.1

02/07/11 NA NA NA NA NA 2.9 0.2 U 0.2 U 0.2 U 2 2 0.2 U 0.8 5.9 NA NA NA NA NA NA NA 06/06/11 NA NA NA NA NA 1.8 0.2 U 0.2 U 0.2 U 2.6 0.2 U 1.0 5.4 2.0 U 0.002 U 0.005 U O.IS 0.0002 0.02 14.0 08/02/11 NA . NA NA NA NA 1.2 0.2 U 0.2 U 0.2 U 1.8 02 U 0.9 , 3.9 NA 0.002 U 0.005 U 0.07 0.0002 0.03 14.5 10/31/11 6.93 NA NA • 11.3 543 2.6 0.2 U 0.2 U 0.2 U 2.7 0.2 U 1.6 J+ 6.9 NA 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U 18.4 01/31/12 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA

MW92-3B 11/01 6.41 6.5 J NA 12.2 724 5.0 U 5.0 U 5.0 U 5.0 U 16 5.0 U 8.0 24 NA 0.002 U 0.087 1.68 0.001 U 0.006 U 170 2/02 6.45 NA NA 11.6 670 5.0 U 5.0 U 5.0 U 5.0 U 10 5.0 U 6.0 16 NA NA NA NA NA NA NA 5/02 6.47 6.4 J NA 12.0 558 5.0 U 5.0 U 5.0 U 5.0 U 11 S.OU 6.0 17 NA 0.002 U 0.066 i 0.54 0.001 U 0.008 150 8/02 5.76 NA NA 12.9 711 5.0 U S.OU 5.0 U 5.0 U I2J S.OU 5.0 U 12 NA NA NA NA NA NA NA 11/02 6.50 6.53 J NA II 651 5.0 U 5.0 U . 5.0 U 5.0 U 9.0 5.0 U 6.0 15 NA 0.002 U 0.156 2.13 0.001 U 0.009 150 2/03 6.34 NA NA 11.0 576 5.0 U 5.0 U 5.0 U 5.0 U 5.0 5.0 U S.OU 5.0 NA NA NA NA NA NA NA 5/03 6.40 6.59 J NA 11.8 516 5.0 U 5.0 U 5.0 U 5.0 U 6.0 5.0 U S.OU 6.0 NA 0.002 U 0.135 1.7 0.001 U 0.018 U 110 8/03 6.31 NA NA 12.8 587 I.OU 1.0U 1.0U I.OU 5.7 I.OU 3.8 10 NA NA NA NA NA NA NA 1 1/03 6.33 6.55 NA 11.7 632 2.3 I.OU I.OU 1.0 U 6.0 I.OU 4.4 13 NA 0.002 U 0.018 0.18 0.001 J 0.01 140 2/04 6.36 NA NA 10.3 579 1.6 I.OU I.OU I.OU 3.7 I.OU 3.1 8.4 NA NA NA NA • NA NA NA 5/04 6.21 6.58 J NA 13.1 590 1.5 I.OU 1.0U I.OU 3.5 I.OU 2.7 7.7 NA 0.002 U 0.055 0.57 0.001 0.006 U 72.2 8/04 NA NA NA NA NA 2.5 0.2 U 02 U 0.2 U 2.9 0.2 U 1.2 6.6 NA NA NA NA NA NA NA 11/09/04 6.57 6.57 J NA 12.3 607 2.4 0.2 0.2 U 0.2 U 4.6 0.2 U 4.3 12 NA 0.002 U 0.066 0.82 0.001 U 0.009 165 02/22/05 NA NA \ NA NA NA 3.9 0.2 U 0.2 U 0.2 U 3.0 0.2 U 2.8 10 NA NA NA NA NA NA NA 05/03/05 6.35 6.54 NA 1 1.2 • 565 2.2 0.2 U 0.2 U 0.2 U 2.4 0.2 U 2.1 6.7 NA 0.002 U 0.082 0.84 0.001 U 0.006 U 122 08/02/05 NA NA NA NA NA 1.5 0.2 U 0.2 U 0.2 U 2.5 02 U 2.1 6.1 NA NA NA NA NA NA NA 11/08/05 6.46 6.58 NA 12.4 656 4.0 0.4 0.2 U 0.2 U 4.4 0.2 U 2.5 11 NA 0.002 U 0.122 1.24 0.001 U 0.013 U 151 01/29/06 NA NA NA NA NA . 3.4 0.3 0.2 U 0.2 U 3.6 0.2 U 3.4 .. 11 NA NA NA NA NA NA NA 05/08/06 6.42 6.59 NA 11.6 569 2.3 0.2 U 0.2 U 0.2 U 2.5 0.2 U 2.3 7.1 NA 0.002 U 0.054 0.69 0.002 0.008 124 08/19/06 NA NA NA NA NA 3.2 0.3 0.2 U 0.2 U 3.6 0.2 U 3.4 II NA NA NA NA NA NA NA 11/06/06 NA NA NA NA NA 3.2 0.5 0.2 U 0.2 U 3.3 0.2 U 4.1 11 NA NA NA NA NA NA NA 02/10/07 NA NA NA NA NA 2.4 0.3 02 U 0.2 U 2.7 0.2 U 3.8 9.2 NA NA NA NA NA NA NA 05/01/07 NA NA NA NA NA 3.1 0.5 0.2 U 0.2 U 2.8 02 U 4.0 10.4 NA NA NA NA NA NA NA 10/28/07 NA NA NA NA NA 4.5 0.8 0.2 U 0.2 U 4.7 0.2 U 2.9 12.9 NA . NA NA NA NA NA NA 02/04/08 NA NA NA NA NA 4.9 1.1 0.2 U 0.2 U 5.1 0.2 U 7.6 19 NA N A N A NA NA NA NA 05/13/08 6.43 6.62 J NA 11.9 530 4.4 0.9 0.2 0.2 U 4.4 0.2 U 6.3 16 2.0 U 0.002 U 0.097 2.19 0.002 0.02 J+ 108 08/07/08 NA NA NA NA NA 3.2 0.6 0.2 U 0.2 U 3.2 0.2 U 3.5 II NA NA NA NA NA NA NA 11/18/08 6.39 6.46 NA 10.7 628 6.2 1.3 0.2 U 0.2 U 6.1 0.2 U 5.0 19 2.0 U 0.002 U 0.018 0.50 0.001 U 0.01 V 120 02/17/09 7.60 6.53 NA 10.6 524 3.8 1.0 02 0.2 U 4.0 0.2 U 5.6 15 2.0 U 0.002 U 0.029 2.58 0.002 0.01 U 123 05/05/09 6.70 6.31 NA 11.9 538 2.0 0.3 0.2 U 0.2 U 2.1 0.2 U 2.4 6.8 2.0 U 0.002 U 0.014 0.17 0.001 U 0.01 U 67.7 07/27/10 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.3 1.3 2.0 U 0.002 U 0.008 0.19 0.001 U 0.01 U 43.5 10/27/10 6.57 NA NA 10.9 487 0.9 0.2 U 0.2 U 0.2 U 0.5 0.2 U 0.6 2.0 NA NA* NA NA NA NA NA 02/07/11 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.4 1.3 NA NA NA NA NA NA NA 06/06/11 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.6 2.0 U 0.002 U 0.005 U 0.12 0.0006 0.01 U 35.9 08/02/11 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.6 NA 0.002 U 0.005 U 0.05 U 0.0004 0.01 U 34.3 10/31/11 6.42 NA NA 11.9 418 0.3 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 J+ 0.5 NA 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U 37.7 01/31/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 NA NA NA NA NA NA NA

MW04-0I (76 feet BTOC) 11/22/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U • 02 U ND NA NA NA NA NA NA NA 02/20/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 02 U 02 U ND NA NA NA NA NA NA NA

(86 feet BTOC) 1 1/22/04 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/20/05 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 UJ 0.2 U 0.2 U ND NA NA NA NA NA NA NA

(96 feel BTOC) 11/22/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/20/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

(106 feet BTOC) 11/22/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/20/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/01/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/02/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/06/05 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 0.2 U 0.2 U 0.2 NA NA NA NA NA NA NA 01/29/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/07/06 NA NA NA NA NA 0.2 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.2 U 0.5 NA NA NA NA NA NA NA 08/21/06 NA NA NA NA NA 02 U 02 U 0.2 U 0.2 U 0.2 0.2 U 0.2 U 0.2 NA NA NA NA NA NA NA 11/05/06 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.5 0.2 U 0.3 1.1 NA NA NA NA NA NA NA

*K :W3^ IN IKA^0 i r ^_Mn-CT3b tc5V. Fioi Rcpocu\r\pn ButmiiirtTlbkl'iTibk 4-Mow tot m Wel (klautonn| wells) Page 13 of 22 URS Corporation

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Tab le 4

Summary of Analytical Result! for Monitoring and Interceptor Wells Liodsay Manufacturing, L L C Lindsay, Nebraska

Specific Orga nic Analyses (u J/L) Inorganic Analyses (mg/L)C

Water Conductivity pH pH TSS (mg/L) Temperature (umho/cin) Total Volatile

Well Identification Date Collected (field) (lab) (lab) C O (field) (field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate ,

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3d 0.05 5.0 250

Alternate Cleanup Level On Property >5.0 >5.0 • NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500


MW04-01 (106 feel BTOC) 02/10/07 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.6 0.2 U 0.4 1.4 NA NA NA NA NA NA NA

continued 04/29/07 NA NA NA NA NA 0.9 0.2 U 0.2 U 0.2 U 0.9 02 U 0.4 2 2 NA NA NA NA NA NA NA 08/12/07 NA NA NA NA NA 0.2 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.2 0.7 NA NA NA NA NA NA NA 10/28/07 NA NA NA NA NA 0.5 0.2 U 0.2 U 0.2 U 0.7 0.2 U 0.3 1.5 NA NA NA NA NA NA NA 02/03/08 NA NA NA. NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/11/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/05/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/14/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/16/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/06/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA • NA 10/31/10 NA NA NA NA NA 0.2 U 0.2 U 0.2.U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/10/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/06/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/31/11 6.94 NA NA 16.6 952 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA 01/31/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA • NA NA NA NA NA NA

(116 feet BTOC) 11/22/04 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 IJ 0.2 LI 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/20/05 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

Preiser's New (48 feel BTOC) 4/04 NA NA NA NA NA 18 I.OU 1.0 U I.OU 24 J I.OU 12 54 NA NA NA NA NA NA NA

Irrigation (G127000) (7Q feet BTOC) 4/04 NA NA NA NA NA 58 3.1 1.3 I.OU 71 J I.OU 20 153 NA NA NA NA NA NA NA

(90 feel BTOC) 4/04 NA NA NA NA NA 100 6.0 . 2.9 1.0U 130J 1.0 44 284 NA NA NA NA NA NA NA

5/04 6.69 NA NA 1 1.9 855 56 3.8 1.4 I.OU 92 I.OU SO 203 NA NA NA • NA NA NA NA 8/04 NA NA NA NA NA 9.0 0.6 0.2 0.2 U 15 0.2 U 8.2 33 NA NA NA NA NA NA NA 9/04 NA NA NA NA NA NA NA NA NA NA NA NA NA 2.3 J NA NA NA NA NA NA 11/10/04 NA NA NA NA NA 83 5.5 2.4 0.2 U no 0.8 30 232 NA NA NA NA NA NA NA 02/22/05 7.18 6.91 NA 10.9 766 41 2.7 1.0 U I.OU 64 I.OU 42 150 4.7 J 0.002 U 0.005 U 0.26 0.002 0.081 159 05/O3/O5 6.79 NA NA 11.4 1154 79 7.3 2.7 0.2 U 160 0.8 52 302 2.9 J NA NA NA NA NA NA 8/1 -8/2/05 NA NA NA NA NA 9.0 0.6 0.3 0.2 U 12 0.2 U 5.9 28 5.0 U NA NA NA NA NA NA 11/09/05 6.72 NA NA 10.8 734 19 1.3 0.5 0.2 U 38 0.2 U 11 70 4.0 U NA NA NA NA NA NA 01/29/06 NA NA NA NA NA 94 6.4 2 2 0.2 U 120 0.8 58 • 281 NA NA NA NA NA NA NA . 05/08/06 6.82 NA NA 11.5 792 30 4.1 1.3 1.0U 81 I.OU 23 139 3.7 NA NA NA NA NA NA 08/23/06 6.92 NA NA 11.6 857 17 I.I 0.6 0.4 U 21 0.4 U 4.9 45 2.0 U NA NA NA NA NA NA 11/06/06 7.18 NA NA 11.7 721 34 2.4 1.0 I.OU 43 I.OU 18 98 2.0 U 0.002 U 0.005 U 0.05 U 0.003 0.021 U NA 02/21/07 NA NA NA NA NA 57 3.5 1.4 0.2 UJ 65 0.5 42 169 3.4 0.002 U 0.007 48.8 0.023 0.12 NA 05/04/07 6.88 6.99 J NA 11.2 749 37 2.4 1.0U 1.0U 42 I.OU 24 105 2.9 0.002 U 0.005 U 0.05 U 0.002 0.04 88.4 08/15/07 7.49 7.35 J NA 1 I.S 867 5.1 0.6 0.2 U 0.2 U 7.3 0.2 U 4.3 17 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.04 U 61.9 10/29/07 6.87 NA NA 1 1.6 582 3.0 0.2 0.2 U 0.2 U 4.0 0.2 U 3.0. 10 2.0 U 0.002 U 0.005 U 0.05 U 0.001 0.01 U NA 02/05/08 6.88 NA NA 1 1.4 563 3.3 0.4 0.2 U 0.2 U 4.4 0.2 U 4.1 12 2.0 U 0.002 U 0.005 U 0.08 0.001 0.02 U NA 05/14/08 6.97 7.05 J NA 11.5 598 2.7 0.4 02 U 0.2 U 3.3 0.2 U 3.9 10 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA 08/O5/O8 7.33 NA NA 12.9 787 2.8 0.5 0.2 U 0.2 U 3.3 0.2 U 4.2 11 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.02 NA 11/17/08 6.96 NA NA 11.5 1.146 1.7 0.4 0.2 U 0.2 U 2.4 0.2 U 3.0 8 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA 02/18/09 7.80 NA NA 10.9 603 1.5 0.3 0.2 U 0.2 U 0.2 U 0.2 U 2.9 4.7 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.01 NA 02/18/09 7.80 NA NA 10.9 603 NA NA NA NA NA NA NA NA NA . 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U (D) NA 05/06/09 7.30 NA NA 1 1.5 665 1.8 0.5 0.2 U 0.2 U 2.1 0.2 U 3.9 8.3 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u O.04 NA 05/06/09 7.30 NA NA 11.5 665 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.006 (D) 0.05 U (D) 0.001 U(D) 0.01 (D) NA 08/13/09 6.35 NA NA 12.2 735 2.8 0.7 0.2 U 0.2 U 3.0 0.2 U 6.2 13 2.0 U 0.002 U 0.006 0.05 U 0.001 0.02 NA 10/28/09 7.04 NA NA 8.9 835 2.1 0.5 0.2 U 0.2 U 2.1 0.2 U 4.8 9.5 2.0 U 0.002 U 0.005 U 0.05 U 0.016 0.03 NA 02/03/10 6.90 NA NA 11.7 608 2.1 0.7 0.2 U 0.2 U 2.2 0.2 U 5.3 10 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.05 NA 05/17/10 6.69 NA NA 11.9 602 1.4 0.4 02 U 0.2 U 1.3 0.2 U 3.5 6.6 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.02 NA 08/16/10 7.02 NA NA 12.7 674 1.8 0.5 0.2 U 0.2 U • 1.6 0.2 U 4.3 8.2 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.02 NA 08/16/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.04 (D) NA 10/26/10 6.74 NA NA II.S 601 1.6 0.5 0.2 U 0.2 U 1.3 0.2 U 3.8 7.2 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.01 U NA 10/26/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 (D) 0.01 U (D) NA

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Table 4 Summary of Analytical Results for Monitoring and Interceptor Wells Lindsay Manufacturing, L L C Lindsay, Nebraska )

Specific Organic Analyses (pg/L)

Water Conductivity pH pH TSS (mg/L) Temperature (pmbo/cm) Total Volatile

Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium C

EPA M C L

• NE NE 7 NE 170 5 200 5 5 NE 0.005

Alternate Cleanup Level On Property 2 5.0 2 5.0 NE NE NE NE • NE NE NE NE NE NE NE NE

Alternate Cleanup Level Off Property 2 6.3 2 6.3 NE NE NE NE NE NE NE NE NE NE NE NE

Preiser's New (90 feet BTOC) 02/10/11 6.97 NA NA 10.8 559 2.0 0.4 0.2 U 0.2 U 1.5 0.2 U 4.2 8.1 2.0 U 0.002 U

Irrigation (G127000) 02/10/11 (DUP) 6.97 NA NA 10.8 559 1.9 0.4 0.2 U 0.2 U 1.5 0.2 U 4.1 7.9 2.0 U 0.002 U

continued 02/10/11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.1

02/10/11 (DUP) NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.1

06/07/11 7.09 NA NA 13.1 596 1.6 0.5 0.2 U 0.2 U 1.4 0.2 U 3.7 7.2 2.0 U 0.002 U

06/07/11 7.09 NA NA 13.1 596 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.1 6/7/11 (DUP) 7.09 NA NA 13.1 596 1.7 0.5 0.2 U 0.2 U 1.4 0.2 U 4.0 7.6 2.0 U 0.002 U 6/7/11 (DUP) 7.09 NA NA 13.1 596 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.( 08/02/11 6.92 NA NA 12.4 662 2.1 0.6 0.2 U 0.2 U 1.7 0.2 U 4.5 8.9 2.0 U 0.002 U

08/02/11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.(

08/2/11 (DUP) 6.92 NA NA 12.4 662 2.2 0.6 0.2 U 0.2 U 1.8 0.2 U 4.9 9.5 2.0 U 0.002 U

10/27/11 7.02 NA NA 11.5 581 1.8 0.6 0.2 U 0.2 U 1.4 0.2 U 3.7 7.5 2.0 U 0.002 U

10/27/11 (DUP) 7.02 NA NA 1 1.5 NA 1.8 0.5 0.2 U 0.2 U 1.3 0.2 U 3.8 7.4 NA NA

01/30/12 6.84 NA NA 11.3 567 1.6 0.5 0.2 U 0.2 U 1.2 0.2 U 3.7 7.0 2.0 U 0.002 U

1/30/12 (DUP) 6.84 NA NA 11.3 567 1.6 0.5 0.2 U 0.2 U 1.2 0.2 U 3.7 7.0 NA 0.002 U

(0127000-Pivot) 08/01/04 6.90 NA NA 11.6 804 24 1.8 I.OU I.OU 38 I.OU 23 "87 NA NA

MW09-02 (53 feet BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

05/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

(63 feet BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

05/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

(67 feet BTOC) 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA . 11/01/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 01/30/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 02 U ND NA NA

(73 feel BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA 05/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

(83 feet BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 05/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA

(93 feet BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 05/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

MWO9-03A 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 11/01/10 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 06/07/11 NA NA NA NA . NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

MW09-03B 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 11/01/10 NA NA NA NA NA 0.2 U 02 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 06/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA 01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

MW09-04A 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 11/01/10 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 02/10/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U .0.2 U 0.2 U ND NA NA 06/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 07/28/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA 10/24/11 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA 01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA

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Table 4 Summary of Analytical Results for Monitoring aod Interceptor Welts Lindsay Manufacturing, L L C Lindsay, Nebraska

Specific Organic Analyses (pg/L) Inorganic Analyses (mg/L)C

Water Couducrivity

PH pH TSS (mg/L) Temperature (umho/cm) Total Volatile Well Identification Date Collected (field) flab) (lab) C O (field) (field) 1,1-DCE 1,1-DCA l ,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L - NE NE 7 NE 170 5 200 5 5 - NE 0.005 0.05 0.3d 0.05 5.0d 250d

Alternate Cleanup Level * On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level 1 Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400 MW09-O4B 07/25/10 . NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA . NA NA NA NA

11/01/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/10/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/28/11 NA NA NA NA NA 02 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW04-0Z (68 feel BTOC) 11/22/04 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 03 0.2 U 0.2 U 0.6 NA NA NA NA NA NA NA 02/21/05 NA NA NA NA NA 13 I.I 0.4 0.2 U 16 02 U 5.5 36 NA NA NA NA NA NA NA

(78 feet BTOC) 11/22/04 NA NA NA NA NA 18 1.0 0.5 0.2 U 16 0.2 U 3.2 39 NA NA NA NA NA NA NA 02/21/05 NA NA NA NA NA 14 1.7 0.8 0.2 U 22 0.2 14 53 NA NA NA NA NA NA NA

(88 feet BTOC) 11/22/04 NA NA NA NA NA 16 1.2 0.6 0.2 U 20 0.2 U 5.8 44 NA NA NA NA NA NA NA 02/21/05 NA NA NA NA NA 14 1.7 0.8 0.2 U 23 0.2 17 57 NA NA NA NA NA NA NA

(98 feet BTOC) 11/22/04 NA NA NA NA NA 22 1.2 0.6 0.2 U 20 0.2 U 5.1 49 NA NA NA NA NA NA NA 02/21/05 NA NA NA NA NA 30 3.8 1.7 0.2 U 48 0.5 23 107 NA NA NA NA NA NA NA 05/01/05 NA NA NA NA NA 27 3.5 I.S 1.0U 56 I.OU 24 112 NA NA NA NA NA NA NA 08/01/05 NA NA NA NA NA 29 3.1 1.3 0.2 51 0.4 29 114 NA NA NA NA NA NA NA 11/06/05 NA NA NA NA NA 23 2.8 1.1 I.OU 37 1.0U 24 88 NA NA NA NA NA NA NA 01/29/06 NA NA NA NA NA 22 2.5 1.0 I.OU 36 I.OU 18 80 NA NA NA NA NA NA NA 05/07/06 NA NA NA NA NA 16 1.9 0.8 0.6 U 26 0.6 U 18 63 NA NA NA NA NA NA NA 08/21/06 NA NA NA NA NA 12 1.7 0.7 0.2 U 21 0.2 U 13 48 NA NA NA NA NA NA NA 1 1/05/06 NA NA NA NA NA 9.4 1.4 0.6 U 0.6 U 12 0.6 U 9.3 32 NA NA NA NA NA NA NA 02/10/07 NA NA NA NA NA 12 1.4 0.6 0.2 U 15 0.2 U II 40 NA NA NA NA NA NA NA 04/29/07 NA NA NA NA NA 9.8 1.6 0.5 0.2 U 12 0.2 U 8.5 32 NA NA NA NA NA NA NA 08/12/07 NA . NA NA NA NA 8.8 1.4 0.4 0.2 U 13 0.2 U 8.5 32 NA NA NA NA NA NA NA 10/28/07 NA NA NA NA NA 8.4 1.0 0.3 0.2 U 11 0.2 U 7.2 J 28 NA NA NA NA NA NA NA 02/03/08 NA NA NA NA NA 11 1.3 0.4 0.2 U 15 0.2 U 9.6 37 NA NA NA NA NA NA NA

05/11/08 NA NA NA NA NA 10 1.3 0.4 0.2 U 14 02 U 7.2 33 NA NA NA NA NA NA NA 08/05/08 NA NA NA NA NA 12 1.4 0.6 0.2 U 14 0.2 U 6.0 34 NA NA NA NA NA NA NA

11/14/08 NA NA NA NA NA 14 1.5 0.5 0.2 U 17 • 0.2 U 11 44 NA NA NA NA NA NA NA

02716/09 N A NA NA NA NA 13 1.3 0.6 0.5 U 15 0.5 U 8.7 39 N A N A • NA NA NA NA NA 05/06/09 NA NA NA NA NA 13 1.4 0.5 0.2 U 17 0.2 U II 43 NA NA NA NA NA NA NA 07/ "5/10 NA N A NA NA N A 8.0 08 0.3 0.5 u 7.9 0.2 U Tl 19 NA N A NA . N A NA NA NA 10/31/10 NA NA NA NA NA 10 1.1 0.4 0.2 U 12 0.2 U 7.8 31 NA NA NA NA NA NA NA 02710/11 NA N A NA NA N A IS 12 0.5 0.5 U 17 0.2 U 14 51 NA N A NA NA NA N A N A 06/06/11 NA NA NA NA NA 19 1.2 0.5 0.2 U 17 0.2 U 5.4 43 NA NA NA NA NA NA NA 07/31/11 NA NA NA NA NA 21 1.5 0.7 0.2 U 20 0.2 12 55 NA NA NA NA NA NA NA 10/24/11 NA NA NA NA NA 17 1.5 0.6 0.2 U 18 0.2 12 49 NA NA NA NA NA NA NA 01/26/12 N A NA NA N A N A 20 1.6 0.6 0.5 U 51 0.5 15 53 NA NA N A NA NA NA N A

Preiser's Old Domestic 11/01 6.84 7.0 J NA 16.1 949 38 J 4.7 2.2 0.3 J 77 J 0.5 37 J 160 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.046 130 2/02 6.63 7.0 J NA 9.0 981 SI 5.2 2.4 I.OU 94 I.OU 49 202 NA 0.002 U 0.005 U 0.05 U 0.001 0.009 120 5/02 6.92 6.9 J NA 13.8 818 SO 7.2 3.1 I.OU 130 1.0U 63 283 NA 0.002 U 0.011 J 0.05 U 0.004 0.020 170 8/02 6.52 7.20 J NA 15.5 820 30 J 3.0 J 3.0 UJ 3 UJ 54 J 3.0 UJ 30 J 117 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.009 87 9/02 NA NA NA NA NA 29 2.8 1.0 I.OU 53 I.OU 24 110 NA NA NA NA NA NA NA 11/02 7.07 7.02 J NA 13.6 749 27 2.9 1.5 I.OU 50 1.0U 28 109 NA 0.002 U 0.005 U 0.05 U 0.001 0.006 87

2/03 6.75 7.I2J NA 12.9 827 24 2.8 1.4 1.0U 47 I.OU 27 102 NA 0.002 U 0.005 U 0.05 U 0.002 0.013 100 5/03 6.81 7.05 J NA 14.2 722 40 3.9 1.9 1.0U 71 I.OU 41 158 NA 0.002 U 0.005 U 0.05 U 0.003 0.014 U 110

08/03 6.76 7.09 J NA 15.2 734 18 2.1 1.0U 1.0U 33 I.OU 19 72 NA 0.002 U 0.005 U 0.05 U 0.O01 U 0.008 72 4/04 NA NA NA NA NA II 12 1.0U 1.0U 15J 1.0U 14 41 NA NA NA NA NA NA NA 5/04 6.86 NA NA 12.3 717 13 1.5 I.OU 1.0U . 20 I.OU 14 49 • NA NA NA NA NA NA NA 8/04 7.11 NA NA 12.8 772 10 1.1 0.5 0.4 U 18 0.4 U II 41 NA NA NA NA NA NA NA 11/10/04 6.73 NA NA 11.7 790 8.5 1.0 0.4 0.2 U 14 0.2 U 8.3 32 NA NA NA NA NA NA NA 02/20/05 7.03 NA NA 10.9 770 8.4 0.9 0.4 0.2 U 9.8 0.2 U 8.7 28 NA NA NA NA NA NA NA 05/02/05 7.12 NA NA 10.7 678 8.3 1.1 0.4 02 U 12 0.2 U 9.1 31 NA NA NA NA NA NA NA 07/31/05 7.02 NA • NA 13.2 782 4.4 0.5 0.2 U 0.2 U 5.6 02 U 5.0 16 NA NA NA NA NA NA NA 11/07/05 6.94 NA NA 12.2 741 1.6 0.4 0.2 U 0.2 U 2.7 0.2 U 2.0 6.7 NA NA NA NA NA NA NA 01/29/06 7.05 NA NA 11.4 610 1.0 0.4 0.2 U 0.2 U 1.4 0.2 U 1.3 4.1 NA NA NA NA NA NA NA 05/07/06 6.94 NA NA 11.6 731 1.1 0.3 0.2 U 0.2 U 1.6 0.2 U 1.4 4.4 NA NA NA NA NA NA NA 08/19/06 7.08 NA NA 14.0 725 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 NA NA NA NA NA NA NA 11/05/06 7.08 NA NA 11.4 610 0.2 0.2 U 0.2.U 0.2 U 0.2 U 0.2 U 0.4 0.6 NA NA NA NA NA NA NA

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Specific Organic Analyses (pg/L) . . 7 Inorganic Analyses (mg/L)

Water Conductivity pH pll TSS (mg/L) Temperature (pmbo/cm) h Total Volatile

Well Identification Date Collected (field) flab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE U - D C A 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate


Alternate Cleanup Level On Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500


Preister'i Old Domestic 02/19/07 7.12 NA NA 10.9 702 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.4 0.7 NA NA NA NA NA NA NA

continued 04/30/07 7.09 NA NA 12.6 685 0.3 0.2 0.2 U 0.2 U 0.4 0.2 U 0.4 1.3 NA NA NA NA NA NA NA

08/12/07 7.13 NA NA 13.2 796 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

10/28/07 6.94 NA NA 12.3 582 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 J 0.2 NA NA NA NA NA NA NA

02/03/08 6.89 NA NA 10.6 692 0.2 U 0.2 U 0.2 U 02 U 0.2 0.2 U 0.2 0.4 NA NA NA NA NA NA NA

05/11/08 6.93 . NA NA 11.7 549 0.4 0.2 U 0.2 U 0.2 U 0.5 02 U 0.4 1.3 NA NA NA NA NA NA NA

08/03/08 7.04 NA NA 13.0 827 . 0.5 0.2 U 0.2 U 0.2 U 0.7 0.2 U 0.6 1.8 NA NA NA NA NA NA NA

11/14/08 7.01 NA NA 11.3 639 0.4 0.2 U 0.2 U 0.2 U 0.5 0.2 U 0.5 1.4 NA NA NA NA NA NA NA


10/31/10 7.09 NA NA 11.8 592 2.7 02 0.2 U 0.2 U 3.1 0.2 U 2.4 8.4 NA NA NA NA NA NA NA

MW04-03 (45 feet BTOC) 11/22/04 NA NA NA NA NA 38 1.5 0.7 0.2 U 40 0.2 17 , 97 NA NA NA NA NA NA NA MW04-03 (45 feet BTOC) 02/23/05 NA NA NA NA NA 23 1.5 . 0.6 0.2 U 33 0.2 17 75 NA NA NA NA NA NA NA

(55 feet BTOC) 11/22/04 NA NA NA NA NA 47 1.8 0.8 0.2 U 51 0.3 23 124 NA NA NA NA NA NA NA

02/23/05 NA NA NA NA NA 28 1.8 0.7 0.2 U 40 0.3 20 91 NA NA NA NA NA NA NA

(65 feet BTOC) 11/22/04 . NA NA NA NA NA 82 2.8 12 0.2 U 82 0.4 38 206 NA NA NA NA NA NA NA (65 feet BTOC) 02/23/05 NA NA NA NA NA 42 2.5 I.I 0.2 U 54 0.4 27 127 NA NA NA NA NA NA NA

10/28/07 NA NA NA NA NA 15 1.3 I.OU I.OU 19 I.OU 14 49 NA NA NA NA NA NA NA

02/03/08 NA NA NA NA NA 15 1.4 0.4 0.2 U 20 0.2 U 14 51 NA NA NA NA NA NA NA



11/17/08 NA NA NA NA NA 12 0.8 0.3 0.2 U 15 0.2 U II 39 NA NA NA NA NA NA NA

02/16/09 7.80 NA NA 10.2 683 6.5 0.4 0.2 U 0.2 U 8.4 02 U 6.0 21 NA NA NA NA NA NA NA

05/06/09 NA NA NA NA NA 4.1 0.3 0.2 U 0.2 U 5.4 02 U 3.4 13 NA NA NA NA NA NA NA

07/28/10 NA NA NA NA NA 0.5 0.2 U 0.2 U 0.2 U 0.6 02 U 0.5 1.6 NA NA NA NA NA NA NA

11/02/10 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.5 0.2 U 0.5 1.4 NA NA NA NA NA NA NA

02/14/11 NA NA NA NA NA 0.8 0.2 U 0.2 U 0.2 U 0.9 0.2 U 0.7 2.4 NA . NA NA NA NA NA NA



10/30/11 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

01/26/12 NA NA NA NA NA 0.3 02 U 0.2 U 0.2 U 0.4 . 0.2 U 0.3 1.0 NA NA NA NA NA NA NA

(85 feet BTOC) 11/22/04 NA NA NA NA NA 84J 3.1 1.4 0.2 U 90 J 0.5 40 219 NA NA NA NA NA NA NA


10/28/07 NA NA NA NA NA 19 J 1.3 0.5 0.2 U 26 J 0.2 U 20 J 67 NA NA NA NA NA NA NA

02/03/08 NA NA NA NA NA 18 1.3 0.6 U 0.6 U 23 0.6 U 15 57 NA NA NA NA NA NA NA

05/11/08 NA NA NA NA NA 37 2.8 I.I 0.2 44 0.3 . 30 115 NA NA NA NA NA NA NA

08/05/08 NA NA NA NA NA 29 2 2 0.7 0.2 U 43 0.3 29 104 NA NA NA NA NA NA NA


02/16/09 7.80 NA NA 10.2 683 16 I.I 0.4 0.2 U 19 0.2 U 14 51 NA NA NA NA NA NA NA


07/28/10 NA NA NA NA NA 4.0 0.3 0.2 U 0.2 U 4.9 0.2 U 3.5 13 NA NA NA NA NA NA NA







(105 feet BTOC) 11/22/04 NA NA NA NA NA 62 3.0 1.3 0.2 U 95 0.4 47 209 NA NA NA NA NA NA NA (105 feet BTOC) 02/23/05 NA NA NA NA NA 54 3.5 '•5 0.2 U 71 0.5 38 169 NA NA NA NA NA NA NA

(110 feet BTOC) 11/22/04 NA NA NA NA NA 62 3.2 1.4 0.2 U 94 0.5 46 207 NA NA NA NA NA NA NA (110 feet BTOC) 02/23/05 NA NA NA NA NA 59 3.6 1.4 0.2 U 74 0.5 35 174 NA NA NA NA NA NA NA

(120 feet BTOC) 11/22/04 NA NA NA NA NA 62 3.0 1.4 0.2 U 97 0.4 48 212 NA NA NA NA NA NA NA (120 feet BTOC) 02/23/05 NA NA NA NA NA 55 3.3 1.3 0.2 U 73 0.5 33 166 NA NA NA NA NA NA NA


08/04/05 NA NA NA NA NA 48 3.6 1.5 0.2 U 80 0.5 45 179 5.0 U 'NA NA NA NA NA NA

11/09/05 6.88 NA NA 10.5 845 47 3.7 1.6 1.0U 75 1.0U 44 177 3.8 J NA NA NA NA NA NA

01/29/06 NA NA NA NA NA 41 3.0 1.2 I.OU 70 I.OU 38 • 153 NA NA NA NA NA NA NA

05/08/06 7.01 NA NA 11.9 863 36 2.7 I.I 1.0U 51 1.0U 35 126 5.0 NA NA NA NA NA NA

08/23/06 NA NA NA NA NA 50 3.9 2.0 I.OU 83 2.1 .. 39 180 . 4.4 NA NA NA NA NA NA

11/06/06 NA NA NA NA NA 29 2.4 1.0U I.OU 43 1.0U 27 101 3.4 NA NA NA NA NA NA

K:U05VLrNDSAi'\a]l2ti. OeUvcnbIn\9.1 F o i RepnAAfXiJ BiusunTiblnVTible 4-Stajutaia Weil (Momtoriot wells•VI1/2012 Page 17 of 22 URS Corporation

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Table 4

Summary of Ana ly t i ca l Results for Moo i to r iag and Interceptor Wel ls


L indsay, Nebraska



Well Identification Date Collected (field) (lab) (lab) C O (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA MCL NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0d 250d

Alternate Cleanup Level * On Property >5.0 > 50 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500


MW04-03 (120 feet BTOC) 02/11/07 NA NA NA NA NA 22 3.1 1.2 0.2 U 32 0.4 22 81 2.2 NA NA NA NA NA NA continued 04/29/07 6.84 NA NA 12.5 781 39 3.1 1.2 I.OU 46 I.OU 32 121 3.1 NA NA NA NA NA NA

08/13/07 6.97 NA NA 12.7 824 30 2.4 I.OU I.OU 42 I.OU 26 100 3.9 J 0.002 U , 0.03 24.7 0.013 0.07 U NA 10/28/07 NA NA NA NA NA 30 J 2.0 0.8 0.2 U 40 J 0.3 303 103 2.3 NA NA NA NA NA NA 02/03/08 • NA NA NA NA NA 31 2.3 0.8 0.8 U 41 0.8 U 25 100 2.0 NA NA NA NA NA NA 05/11/08 NA NA NA NA NA 35 2.8 1.1 0.2 43 0.4 29 112 2.0 U NA NA NA NA NA NA 08/05/08 NA NA NA NA NA 28 2.2 0.7 0.2 U 42 0.2 28 101 2.0 U NA NA NA NA NA NA 11/17/08 NA NA NA NA NA 26 1.6 0.6 0.2 U 34 0.2 21 83 NA NA NA NA NA NA NA 02/16/09 7.80 NA NA 10.2 6S3 16 I.I 0.4 0.2 U 19 0.2 U 13 50 2.0 U NA NA NA NA NA NA 05/06/09 7.30 NA NA 12.5 706 13 0.9 0.3 0.2 U 17 0.2 U 10 41 2.0 U NA NA NA NA NA NA 07/28/10 6.99 NA NA 12.9 743 3.8 0.3 0.2 U 0.2 U 4.6 0.2 U 3.3 12 2.0 U NA NA NA NA NA NA 11/02/10 NA NA NA NA NA 3.1 0.2 0.2 U 0.2 U 3.3 0.2 U 2.5 9.1 2.0 U NA NA NA NA NA NA 02/14/1 1 7.03 NA NA 10.9 633 2.5 0.2 0.2 U 0.2 U 2.6 0.2 U 2.0 7.3 2.0 U NA NA NA NA NA NA 06/06/11 NA NA NA NA NA 2.0 0.2 U 0.2 U 0.2 U 2.3 0.2 U 1.6 5.9 NA . NA NA NA NA NA NA 07/31/11 NA NA NA NA NA 1.4 0.2 U 0.2 U 0.2 U 1.4 0.2 U 1.2 4.0 NA NA NA NA NA NA NA 10/30/11 7.06 NA NA 11.5 618 1.1 0.2 U 0.2 U 0.2 u 1.2 0.2 U 0.8 Jt 3.1 2.0 U NA NA NA NA NA NA 01/26/12 NA NA NA NA NA 0.9 0.2 U 0.2 U 0.2 U 0.9 0.2 U 0.7 2.5 NA NA NA NA NA NA NA

MW04-03 Bailer 02/23/05 NA NA NA NA NA NA NA NA NA NA NA NA NA 5.0 U NA NA NA NA NA NA

MW06-01 06/06/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/21/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA II /OS/06 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/10/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 04/29/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/15/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/29/07 NA NA NA NA NA 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/03/08 NA NA NA NA NA 0.2 U 0.2 U 0.21/ 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/12/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/06/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 VJ 0.2 U 0.2 U 0.2 U 0.2 U , ND NA NA NA NA NA NA NA 11/17/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/18/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/04/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA 11/01/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/02/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA . NA NA NA NA NA 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW06-02A 06/06/06 NA NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.3 1.0 NA NA NA NA NA NA NA 08/21/06 NA NA NA NA NA 1.7 0.2 0.2 U 0.2 U 3.2 0.2 U 0.5 5.6 NA NA NA NA • NA NA NA 11/05/06 NA NA NA NA NA 10 1.1 0.3 0.2 U 12 0.2 U 1.7 25 NA NA NA NA NA NA NA 02/10/07 NA NA NA NA NA 1.2 0.2 U 0.2 U 0.2 U 1.8 0.2 U 1.5 4.5 NA NA NA NA NA NA NA 04/29/07 6.99 7.09 J NA 12.6 574 0.3 0.2 U 0.2U 0.2 U 0.4 0.2 U 0.3 1.0 2.0 U 0.002 U 0.0 II 3.87 0.002 U 0.04 24.3 08/21/07 7.04 7.18 NA 12.9 626 1.2 0.2 U 0.2 U 0.2 U 1.2 0.2 U 0.2 2.6 2.0U 0.002 U 0.011 4.22 0.001 U 0.01 U 30.9 08/21/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.010 U(D) NA 10/29/07 6.95 NA NA 11.4 513 5.0 0.5 0.2 U 0.2 U 5.2 0.2 U 1.0 12 NA 0.002 U 0.016 4.79 0.001 U 0.01 U NA 10/29/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA 02/04/08 6.84 NA NA 10.8 567 0.9 0.2 U 0.2 U 0.2 U 1.1 0.2 U 0.8 2.8 NA 0.002 U 0.013 3.88 0.001 U 0.01 U NA 02/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 (D) NA 05/12/08 6.89 NA 21.1 11.4 462 NA NA NA NA NA NA • NA NA NA 0.002 U 0.008 2.55 0.002 0.01 J+ NA 05/12/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U (D) NA 06/25/08 NA NA NA NA NA 0.2 0.2 U 02 U 0.2 U 0.2 . 0.2 U 0.2 U 0.4 NA NA NA NA NA NA NA 08/06/08 7.11 NA 27.9 11.6 662 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA 0.002 U 0.007 1.87 0.001 U 0.01 NA 08/06/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U (D) NA 11/17/08 7.09 NA • 31.7 10.7 693 20 2.6 0.5 0.2 U 15 02 U 3.0 41 NA 0.002 U 0.006 3.47 0.001 U 0.01 U 1.1 U 11/17/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) / NA 02/19/09 6.90 NA 1.3 10.1 694 17 1.6 0.5 02 U 20 0.2 5.3 45 NA 0.002 U 0.005 U 0.12 0.001 U 0.01 U NA 02/19/09 6.90 NA NA 10.1 694 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U (D) NA 05/04/09 6.90 NA 1.0 U 12.3 710 10 1.2 0.3 0.2 U 10 0.2 U 2.1 24 NA 0.002 U 0.005 U 0.006 0.001 U 0.01 U NA 05/04/09 6.90 NA NA 12.3 710 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.01 U (D) NA 07/26/10 7.09 NA 1.0 13.9 698 6.0 0.4 0.2 U 0.2 U 7.0 0.2 U 5.4 19 2:0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA 07/26/10 7.09 NA NA 13.9 698 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA 10/28/10 6.68 NA NA 10.7 646 12 1.0 6.4 0.2 U 12 0.2 U 9.8 35 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA 10/28/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.02 (D) NA

K:W3M.rKDSAi\?Dl7L PeJjvmbltCSU Fa i Rci>xiA.ApnlB^iultTiJ^ATib]e4'h[oukiTii i | Wdb (Mouono »db ] -4/12/1013 Page 18 of 22 URS Corporation

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Table 4

Summary of Ana ly t ica l Results for Mon i to r ing and Interceptor Wel ls


L indsay, Nebraska

Specific Organic Analyses (p Inorganic Analyses (mg/L)C

Water Conductivity pH PH TSS (mg/L) Temperature (pmho/cm) Total Volatile

Well Identification Date Collected (field) (lab) (lab) CC) (field) (field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Cbromium Iron Lead Zinc Sulfate

EPA M C L

• -NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 " d 0.05 5.0 250d

Alternate Cleanup Level 1 O D Property >5.0 > 5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level& Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

MW06-02A 02/06/1 1 NA NA NA NA NA 6.2 0.4 0.2 U 0.2 U 6.6 0.2 U S.5 19 NA NA NA NA NA NA NA

continued 02/06/1 1 (DUP) NA NA NA NA NA 6.3 0.4 0.2 U 0.2 U 6.8 0.2 U 5.7 19 NA NA NA NA NA NA NA

06/06/11 NA NA NA NA • NA 4.8 0.4 0.2 U 0.2 U 6.0 0.2 U 3.8 15 NA NA NA NA NA NA NA

07/31/11 NA NA NA NA NA 4.2 0.3 0.2 U 0.2 U 4.5 02 U 2.0 11 NA • NA NA NA NA NA NA

10/30/11 6.95 NA NA 11.6 655 9.2 0.8 0.3 0.2 U 9.4 0.2 U 7.0 27 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U NA

01/25/12 NA NA NA NA NA 10 0.9 0.4 0.2 U 10 0.2 U 8.8 30 NA NA NA NA NA NA NA

MW06-02B 06/06/06 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.6 0.2 U 0.3 1.3 NA NA NA NA NA NA NA

08/21/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.2 U 0.2 NA NA NA NA NA NA NA

11/05/06 NA NA NA NA NA 0.4 0.2 U 02 U > 0 2 U 0.6 0.2 U 0.4 1.4 NA NA NA NA NA NA NA

02/10/07 NA NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.6 0.2 U 0.4 1.4 NA NA NA V NA NA NA NA

04/29/07 6.91 7.01 J NA 12.9 557 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.074 55.1 0.042 0.15 21.6

08/21/07 7.06 7.17 NA 12.3 613 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.2 U 0.2 2.0 U 0.002 U 0.049 36.9 0.023 0.1 U 24.3

08/21/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.010 U(D) NA

10/29/07 6.93 N A NA 11.5 465 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA 0.002 U 0.01 3.83 0.01 0.01 NA

10/29/07 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U (D| NA

02/04/08 6.97 NA NA 10.0 543 0.2 U 0.2 U 0.2 U 0.2 V 0.2 U 0.2 U 0.2 U ND NA 0.002 U 0.041 33.0 0.024 0.08 U NA

02/04/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(DJ 0.08 (D) NA

05/12/08 6.87 NA 1,560 12.0 446 NA NA NA NA NA •NA NA NA NA 0.002 U 0.031 22.9 0.015 0.07 J+ NA

05/12/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U (D) NA

06/25/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA N A NA

08/06/08 7.13 NA 499 11.6 643 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA 0.002 U 0.028 19.7 0.012 0.06 NA

08/06/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

11/17/08 6.97 NA 84.5 10.2 606 0.6 0.2 U 0.2 U 0.2 U 0.9 0.2 U 0.5 2.0 NA 0.002 U 0.025 17.7 0.010 0.04 NA

11/17/08 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.01 U(D) NA

02/19/09 7.10 NA I.OU 10.0 551 0.3 0.2 U 0.2 U 02 U 0.5 0.2 U 0.3 1.1 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA

02/19/09 7.10 NA NA 10.0 551 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

05/04/09 7.40 NA I.OU 12.7 569 0.5 0.2 U 02 U 02 U 0.6 0.2 U 0.4 1.5 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA

05/04/09 . 7.40 NA NA 12.7 569 NA NA NA NA NA NA NA NA NA 0.002 U(D) 0.005 U(D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

07/26/10 7.11 NA 1.1 U 14.1 617 0.9 0.2 U 0.2 U 0.2 U 1.0 0.2 U 0.9 2.8 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U NA

07/26/10 7.11 NA NA 14.1 617 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA

10/28/10 6.70 NA NA 10.9 511 0.9 0.2 U 0.2 IJ 0.2 U 1.0 0.2 U 1.1 3.0 2.0 U 0002 U 0.005 U 0.05 U 0.001 U 0.01 U 1.1 U

10/28/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 001 U(D) NA



07/31/11 NA NA NA NA NA 0.6 0.2 U 0.2 U 02 U 0.6 0.2 U 0.7 1.9 NA NA NA NA NA NA NA

10/30/11 7.11 NA NA 11.6 540 1.0 . 0.2 U 0.2 U 0.2 U 1.0 0.2 U 0.9 J+ 2.9 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U NA 01/25/12 NA NA NA NA NA 08 0.2 U 0.2 U 0.2 U 0.7 0.2 U 0.7 2 2 NA NA NA NA NA NA NA

MW06-03 06/06/06 NA NA NA NA NA 0.2 U 0.2 U 02 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

0B/21/06 NA NA NA NA NA 0.2 U 0.2 U 02 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA



04/30/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/13/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA 10/29/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2.U 02 U ND NA NA NA NA NA NA NA

02/03/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA » NA

06/25/08 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/05/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA 11/17/08 NA NA . NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA


05/06/09 NA NA NA • NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


11/01/10 NA NA NA NA NA • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA



07/31/11 NA NA NA NA . NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

10/25/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA

K\O05\LtND3AVx2rjl2\S Deliverables':? I F a i Report s\Apn I BuBDual.Tabl«\Tiblt 4-Monitoring WcU [Mouuni i | welllf •VI3/2012 Page 19 of 22 URS Corporation

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Table 4

S u m m a r y of Analy t ica l Results for Mon i to r ing and Interceptor Wel ls


L indsay , Nebraska

Specific Organic Analyses (p J/L) Inorganic Analyses (mg/L)C


Well Identification Date Collected (field) flab) (lab) C O (field) (field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate


Alternate Cleanup Level • On Property >5.0 >5.0 NE NE NE NE NE NE NE • NE NE NE NE NE NE 10 NE NE 500


MW06-04 06/06/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 V 0.2 U ND NA NA NA NA NA NA NA 08/21/06 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/05/06 NA NA NA NA NA . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/11/07 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND • NA NA NA NA NA NA NA 04/30/07 NA NA NA NA NA 0.2 U 0.2 U 0.2.U 0.2 U 0.2 U 0.2 b 0.2 U ND NA NA NA NA NA NA NA 08/15/07 NA NA NA NA NA 0.2 U 0.2 U 0.2U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/29/07 NA NA . NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA . NA 02/03/08 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA 06/25/08 NA NA NA NA NA • 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 08/06/08 NA NA NA NA . NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/17/08 NA NA NA NA NA 0.2 U 0.2 U 0.2 U * 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/18/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 05/05/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/01/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/02/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA . NA NA NA NA 08/02/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/25/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW07-01A 11/14/07 NA NA NA NA NA 28 3.0 1.5 I.OU 39 I.OU 17 89 NA NA NA NA NA NA NA 02/04/08 NA NA NA NA NA 26 2.7 1.0 0.8 U 33 0.8 U 21 84 NA NA NA NA NA NA NA 05/12/08 NA NA NA NA NA 22 2 2 1.0 0.2 U 28 0.3 21 75 NA NA NA NA NA NA NA 08/06/08 NA NA NA NA NA 13 1.8 0.7 0.2 U 19 02 16 51 NA NA NA NA NA NA . NA 1 1/17/08 NA NA NA NA NA 0.9 0.6 0.2 U 0.2 U 1.2 0.2 U 1.5 4.2 NA NA NA NA NA NA NA 02/18/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 NA NA NA NA NA NA NA 05/04/09 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND . NA NA NA NA NA i NA . NA

11/01/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/06/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 07/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/24/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW07-01B 11/14/07 NA NA NA NA NA 17 2.0 1.0 0.6 U 23 0.6 U II 54 NA NA NA NA NA NA NA 02/04/08 NA NA NA NA NA 15 1.8 0.7 0.4 U 20 0.4 U 13 51 NA NA NA NA NA NA NA 05/12/08 NA NA NA NA NA 12 1.4 0.6 0.2 U 15 0.2 U II 40 NA NA NA NA NA NA NA . 08/06/08 NA NA NA NA NA 12 1.6 0.6 0.2 U 17 0.2 U 13 44 NA NA NA NA NA NA NA 11/17/08 NA NA NA NA NA 32 2.7 I.I 0.2 41 0.3 30 107 NA NA NA NA NA NA NA 02/18/09 7.70 NA NA 10.9 611 4.3 0.7 0.3 0.2 U 0.2 U 0.2 U 5.8 II NA NA NA NA NA NA NA 02/18/09 7.70 NA NA 10.9 611 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA 05/04/09 7.40 NA NA 12.5 618 0.9 0.2 U 0.2 U 0.2 U 1.2 0.2 U 1.0 3.1 . NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D1 NA 07/26/10 7.12 NA 1.4 13.7 629 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.06 0.001 U 0.01 U NA 07/26/10 7.12 NA NA 13.7 629 NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U (D) 0.001 U(D) 0.01 U(D) NA 10/28/10 6.78 NA NA 11.7 515 0.2 U 0.21) 0.2 U 0.2 U 02 U 0.2 U 0.2 02 2.0 U 0.002 U 0.005 U 0.05 0.001 U 0.01 U 1.1 U 10/28/10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.002 U (D) 0.005 U (D) 0.05 U(D) 0.001 U(D) 0.01 U(D) NA 02/07/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/06/11 7.11 NA NA 13.0 537 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

07/31/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 10/24/11 . NA NA NA NA NA 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA

MW09-01 (36.5 feet BTOC) 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 11/01/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

(61 feet BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.3 0.3 NA NA NA NA NA NA NA 06/02/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


(71 feet BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/02/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

(82 feel BTOC) 02/16/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA 06/02/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.4 NA NA NA NA NA NA NA 10/25/11 NA NA NA NA NA 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

K:U10^LIKDSA' , \X l iDeJjvrabio\9.1 Fow RepuruVVpnJ Bb*nittM»bl«\Tible 4-MOBJIOTO U>[fcifciimflon»t »elii)


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Table 4

Summary of Analy t ica l Results for Mon i to r ing and Interceptor Wells


L indsay , Nebraska


Water Conductivity p l l P"l TSS (mg/L) Temperature (umho/cm) Total Volatile

Well Identification Dale Collected (field) (lab) flab) C O (field) (field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate


Alternate Cleanup Level* On Property >50 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

• Alternate Cleanup Level * Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE • 400


MW09-01 (91 feet BTOC) 02/16/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2jU ND NA NA NA NA NA NA NA

continued 06/02/11 NA NA NA NA NA 02 U 02 U 0.2 U 0.2 U 0.2 U 02 U 0.2 0.2 NA NA NA NA NA NA NA


(101 feet BTOC) 02/16/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


(111 feet BTOC) 02/16/11 NA NA NA NA NA 02 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


(121 feel BTOC) 02/16/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

06/02/11 NA NA NA NA NA 02 U "0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


MW10-01A 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA





10/25/11 NA NA 'NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


MW10-0IB 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

11/02/10 NA NA NA NA NA 1.1 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U I.I NA NA NA NA NA NA NA


06/02/11 NA NA NA NA NA 0.2 U 02 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

07/25/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 IJ 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

10/25/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 02 U ND NA NA NA NA NA NA NA

01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA . NA NA NA NA NA

MW1O-0IC 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

11/02/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 02 U ND NA NA NA NA NA NA NA




10/25/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


MWI0-02A 07/25/10 NA NA NA NA NA 2.7 0.3 0.2 U 02 U 3.7 0.2 U 2.5 9.2 NA NA NA NA NA NA NA

11/02/10 NA NA NA NA NA 3.0 0.3 0.2 U 0.2 U 3.7 0.2 U 3.7 11 NA NA NA NA NA NA NA


02/06/11 (DUP) . NA NA NA NA NA 2.2 0.2 0.2 U 0.2 U 2.8 0.2 U 3.7 8.9 NA NA NA NA NA NA NA


06/2/11 (DUP) NA NA NA NA NA 1.3 0.2 U 0.2 U 0.2 U 1.8 0.2 U 2.9 6.0 NA NA NA NA NA NA NA


10/25/11 NA NA NA NA NA 0.7 0.2 U 0.2 U 0.2 U 1.3 0.2 U 2.3 4.3 NA NA NA NA NA NA NA 01/25/12 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U l . f 0.2 U 2.6 4.3 NA NA NA NA NA NA NA

MWIO-02B 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA



06/02/11 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

07/25/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND . NA NA NA NA NA NA NA


01/25/12 NA NA NA NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MWIO-02C 07/25/10 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

11/02/10 NA NA NA NA NA 0.2 U 0.2 U 02 U 02 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


06/02/11 NA NA NA NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


10/25/11 NA NA NA NA NA 02 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA


K'\MS\I.rr4T)SAVx20]?l9 DelKmbln"S I Fina RrprtnjAApnJ Btui)Lijr\rir4ei*.T>hte l-Ucmiorint Wett [Mtioitorin| vdis) Page 21 of 22 URS Corporation

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Well Identification Date Collected pH

(field) pH

(lab) TSS (mg/L)

flab)

Water Temperature

CC) (field)

Specific Conductivity (jimbo/cm)

(field)

Organic Analyses (p J/L) Inorganic Analyses (mg/L)


(field) pH

(lab) TSS (mg/L)

flab)

Water Temperature

CC) (field)

Specific Conductivity (jimbo/cm)

(field) 1,1-DCE 1,1-DCA l ,2-DCE 1,2-DCA 1,1,1-TCA TCE PCE Total Volatile

Organics 1,4-Dioxane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L

Alternate Cleanup Level 1 On Property

Alternate Cleanup Level * Off Property

>5.0

>6.3

>5.0

>6.3

NE

NE

NE

NE

NE

NE

NE

NE

7

NE

NE

NE

NE

NE

170

NE

NE

5

NE,

NE

200

NE

NE

5

NE

NE

5

NE

NE

NE

NE

NE

0.005

NE

NE

0.05

NE

NE

0.3d

10

1

0.05

NE

NE

5.0d

NE

NE

250

500 .

400

MW11-01A 11/14/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MW11-01A 01/26/12 NA NA NA NA NA 02 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW11-01B 11/14/11 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MW11-01B 01/26/12 NA NA NA NA NA 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MWU-02A 11/14/11 NA . NA NA NA NA 2.1 02 0.2 U 0.2 U 2.2 0.2 U 1.8 6.3 NA NA NA NA NA NA NA MWU-02A 01/25/12 NA NA NA NA NA 0.6 0.2 U 0.2 U 0.2 U 0.8 0.2 U 0.8 2 2 NA NA NA . NA NA NA NA

MW11-02H 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MW11-02H 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MWI1-02C 11/14/11 NA NA NA NA NA 4.4 0.5 02 0.2 U 4.1 0.2 U 1.7 11 NA NA NA NA NA NA NA MWI1-02C 01/25/12 NA NA NA NA NA 8.7 0.8 0.5 0.2 U 8.5 0.2 U S.5 24 NA NA NA NA NA NA NA

MWU-03A 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA MWU-03A 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA

MW11-03B 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MW11-03B 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW1I-03C 11/14/11 NA NA NA NA NA 0.2 (J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MW1I-03C 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MWI1-04A 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MWI1-04A 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 02 U ND NA NA NA NA NA NA NA

MWI1-04B • 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MWI1-04B • 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA NA NA NA NA NA NA

MWI1-04C 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U ND NA NA NA NA NA NA NA MWI1-04C 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 02 0.5 NA NA NA NA NA NA NA

MW1I-05A 11/14/11 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA MW1I-05A 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U. • 0.2 U 0.2 U ND NA NA NA NA NA NA NA

MW11-05B 11/14/11 • NA NA NA NA NA 0.5 0.2 0.2 U 0.2 U 0.7 0.2 U 0.4 1.8 NA NA NA NA NA NA NA MW11-05B 01/25/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 02 U ND NA NA NA NA NA NA NA

MWI1-05C 11/14/11 NA NA NA NA NA 0.5 0.2 U 0.2 U 0.2 U 05 0.2 U 0.2 U 1.0 NA NA NA NA NA NA NA MWI1-05C 01/25/12 NA NA NA NA NA 0.5 0.3 0.2 U 0.2 U 0.6 0.2 U 0.2 U 1.4 NA NA NA NA NA NA NA

MWII-06 (44 feel BTOC) 1 1/14/11 NA NA NA NA NA 2.0 0.5 0.2 U 0.2 U 2.1 0.2 U 2.4 7.0 NA NA NA NA NA NA NA MWII-06 (44 feel BTOC) 01/26/12 NA NA NA NA NA 0.4 0.2 U 02 U 0.2 U 0.4 0.2 U 0.6 1.4 NA NA NA NA NA NA NA

(85 feel BTOC) 11/14/11 NA NA NA NA NA 2.4 0.6 0.2 0.2 U 2.5 0.2 U 3.2 8.9 NA NA NA NA NA NA NA (85 feel BTOC) 01/26/12 NA NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 04 0.2 U 0.2 0.6 . NA NA NA NA NA NA NA

(119 feet BTOC) 11/14/11 NA NA NA NA NA 1.9 0.6 0.2 U 0.2 U 2.1 0.2 U 2.5 7.1 NA NA NA NA NA NA NA (119 feet BTOC) 01/26/12 NA NA NA NA NA 2.0 0.5 0.2 U 02 U 2 2 0.2 U 2.2 6.9 NA NA NA NA NA NA NA

MWII-07 11/14/1 1 NA NA NA NA NA 1.2 0.4 0.2 U 0.2 U 0.8 0.2 U 0.2 2.6 NA NA NA NA NA NA NA MWII-07 01/25/12 NA NA NA NA NA 1.7 0.7 0.2 U 02 U 0.2 U 0.2 U 0.5 2.9 NA NA NA NA NA NA NA

'Reference teller from Slate of Nebraska to Lindsay Manufacturing, LLC dated 12/14/00 applicable 10 sulfate, pH, and iron. 6The EPA MCL for 1,2-DCE is the sum of the individual EPA MCLs for the cis-1,2-DCE (70 (ug/L) and trajis-l ,2-DCE (100 (ug/L) isomers.

Metals are total unless a (D) designator is beside the result. The (D) indicates metals were Filtered and are dissolved fraction. d EPA secondary MCLs Notes:

Bold font indicates result reported is above or equal to the MCL or the alternate cleanup level. Total Volatile Organics sum of detected results for 1,1-DCE, 1,1-DCA, 1,2-DCE, 1,2-DCA, 1,1,1-TCA, TCE, and PCE

1,1-DCE l,!-dichloroe!hene 1.1- DCA - 1,1-dichloroethane 1.2- DCE - total of cis-1,2-dichloroethene and trans-1,2-dichIoroeihene 1,2-DCA 1,2-dichloroeihane 1,1,1-TCA 1,1,1-tTichloroethane TCE trichloroethene PCE tetrachloroethene BTOC below top of casing

C degree Celsius DUP - duplicate J - estimated value

. J+ estimated value, biased high MCL • maximum contaminant level ug/L microgram per liter umho/cm micromho per centimeter mg/L milligram per liter

NA not analyzed or not available ND not detected NE noi established TOC top of casing TSS total suspended solids U Compound was analyzed for, but not detected. UJ The compound was not detected; however, the reported quantitation limit is estimated.

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Table 5

Summary of Analytical Rrsolls for Domestic. Irrigation, and Slock Wells

Lindsay Manufacturing, L L C

Lindsay, Nebraska

Specific Organic Analyses Upg/LJ Inorganic Analyses (mg/L)


(field) pH

(lab)

Water Temperature (°C) (field)

Conductivity (pmbo/cm)

(field) 1,1-DCE 1,1-DCA U - D C E U-DCA 1,1,1-TCA TCE PCE Total Volatile


E P A M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0 250

Alternate Cleanup Levef On Property >50 >5.0 NE N E NE NE NE NE NE NE NE NE NE N E 10 NE NE 500

Alternate Cleanup Levcf Off Property >6 3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

Beller Domestic (BFF) 11/02 6.69 NA I4.S 906 2.2 1.3 I.OU 1.0U 2.8 1.0U 1.2 7.5 NA N A N A NA NA NA N A

2/03 6.69 NA 13.4 746 2.3 1.4 I.OU I.OU 3.0 1.0U 9.3 16 NA NA N A N A NA NA N A

8/03 6.67 6.97 J 14.8 802 2.0 1.4 1.0U 1.0U 2.3 I.OU 6.8 13 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.007 39

11/03 6 77 NA 13.1 780 1.0 U 1.0U 1.0 U 1.0U 1.0 U I.OU 3.9 3.9 NA NA NA N A NA NA NA

2/04 6.49 6.81 J 77 785 1.0 I.OU 1.0 u 1.0U 1.2 I.OU 4.9 J 2.2 NA 0.002 U 0.005 U 0.05 U 0.001 0.018 J 46

5/04 6.75 7.01 J 12.8 761 1.5 1 OU 1.0U I.OU 1.0 U I.OU 6.7 8.2 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.007 41.3 J

S/04 6.S7 6.89 12 9 824 0.7 . 0.4 0.2 U 0.2 U 0.9 0.2 U 3.5 5.5 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.007 39

9/04 NA NA NA NA NA NA NA NA NA NA NA N A 1.0 UJ NA NA NA NA NA N A

11/07/04 6.62 6.95 J 17.3 741 0 6 0.4 0.2 U 0.2 U 0.8 0.2 U 3.1 4.3 2.0 UJ 0.002 U 0.005 U 0.05 U 0.001 U 0.007 42.8

02/20/05 6.7S 6.93 J 12.5 828 0.9 0.5 0.2 U 02U 0.8 J 0.2 U 4.2 4.7 5.0 U 0.002 U 0.005 U 0.05 U 0 001 0.007 41.2

05/01/05 6.68 7.12 J 12.0 729 1.0 0.6 0 2 U 0.2 U 11 0.2 U 4.3 7.0 2.1 J 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 42.6

07/31/05 6 85 6.98 J 13.6 873 0.3 0.2 U 0.2 U 0.2 U 0.3 02U 1.2 1.8 5.0 U 0.002 U 0.006 0.05 U 0.001 u 0.008 36.1

11/06/05 6.83 6.90 J 12.6 833 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.8 1.1 4.0 U 0 002 U 0.005 U 0.05 U 0.001 u • 0.011 38.9

01/29/06 6.84 6.91 1 122 747 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.8 1.0 4.0 U 0.002 U 0.005 U 0.05 U 0.001 0.006 U 37.3

01/29/06 (DUP) 6 84 NA 12.2 747 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.2 U 0.7 1.0 N A NA NA NA NA NA NA

05/07/06 6.86 7.04 J 12.3 878 0.3 0.2 0.2 U 0.2 U 0.3 0.2 U 1.0 1.8 2 U 0.002 U 0.005 U 0.05 U 0.001 0.012 35.5

05/07/06 (DUP) 6 86 NA 12.3 878 0.2 0.2 U 0.2 V 0.2 U 0.3 0.2 U 1.0 1.5 N A NA NA N A NA NA N A

08/19/06 6.87 7.02 J 136 901 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.012 0.05 U 0.001 u 0.505 120

11/05/06 6.74 6.78 J 12.4 772 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 V 0 005U 0.05 U 0.020 0 036J+ 36.0

02/10/07 7.24 6.89 J I I S 825 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 2.0 U 0.002 U 0.006 0.050 U 0.002 0.009 J+ 41.3

04/29/07 6S0 7.13 J 125 873 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 2.0 U 0.002 U 0.005 0.05 U 0.002 U 0.01 39.5

08/12/07 6.93 6.88 J 13.5 986 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0 005U 0.05 U 0.001 U 0.01 l i 39.1

10/28/07 6.79 6.78 J 13.1 708 0.2 U 0.2 U 02 U 0.2 U 02 U 0 2 U 0.2 U N D 2.0 U 0.002 U 0.006 0.05 U 0.001 U 0.01 U 39.9

02/03/08 6 63 7.05 J 12.5 826 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.01 U 39.7

05/11/08 6.46 6.89 J 12.0 656 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 0.01 U 38.8

08/03/0S 6.92 7.14 J 13.4 981 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.008 0.05 U 0.001 U 0.01 U 38.8

11/13/08 6.63 7.08 14.7 790 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U O.002 U 0.006 0.05 U 0.002 U 0.02 37.8

02/23/09 6.49 7.04 J 12.1 717 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.006 0.05 U 0.001 u 0.01 U 38.3

05/11/09 6.75 6.92 J 12.8 877 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 2.0 U 0.002 U • 0.005 U 0.05 U 0.001 u 0.01 39.6

08/11/09 6.90 7.06 13.7 889 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.009 0.05 U 0.001 0.01 u 39.1

10/27/09 6.90 6.83 14.9 858 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 V 0.2 U N D 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.01 u 44.5

02/02/10 6.S8 6.98 12.5 817 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U . ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.01 u 39.6

05/18/10 691 6.84 J 12.8 S28 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 0.2 2.0 U 0.002 U 0.005 U 0.05 U O.00I u 0.01 u 44.6

08/16/10 7.07 NA 13.9 851 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2 0 U 0.002 U 0.005 0.05 l i O.OOI u 0.01 u 40.1

10/31/10 6.78 N A 12.7 724 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 0.68 0.001 u 0.01 u 39.6

02/09/11 6.94 N A 12.2 791 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.01 u 36.9

05/15/11 6.80 NA 12.6 782 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.6 2.0 U 0.002 U 0.005 U 0.05 U 0.0002 0.01 u • 30

07/27/11 6.63 NA •. 14.3 849 0.3 0.2 0.2 U 0.2 U 0.2 0.2 U 0.5 1.2 2.0 U 0.002 U 0.005 U 0.05 U 0.0002 0.01 37.5

10/26/11 666 NA 13.0 856 0.4 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.8 1.6 2.0 U 0.002 U 0.005 U 0.05 U 0.0002 0.01 u 39.4

01/31/12 6 67 NA 12.8 669 0.5 0.5 0.2 U 0.2 U 0.3 0.2 U 1.1 2.4 2.0 U 0 002 U 0.005 U 0.05 U 0.0001 u 0.01 u 43.3

1/31/12 (DUP) 6 67 NA 12.8 669 0.5 0.5 0.2 U 0.2 U 0.3 0.2 U 1.1 2.4 N A NA NA N A NA NA NA

Beller Domestic (AFF) 08/03 6 79 N A 13.4 801 1.0 u 1.0U 1.0U 1.0U I.OU 1.0 u 1.0U ND N A NA NA N A NA NA NA

11/03 NA NA NA NA I.OU I.OU I.OU 1.0 U 1.0U I.OU I.OU ND N A NA N A N A NA NA NA

2/04 6.57 NA 9.5 798 1.0U I.OU 1.0U I.OU 1.0U I.OU 2 2 2 2 N A NA NA N A NA NA NA

4/04 NA N A NA NA 1.0U 1.0 U I.OU I.OU 1.0 U) I.OU 1.6 16 NA NA NA NA NA NA N A

5/04 6.82 N A 12.3 763 10 u 1.0 u I.OU I.OU 1.0U 1.0U 1.2 1.2 N A NA NA N A NA NA N A

8/04 6.91 N A 12.8 821 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 N A NA NA N A NA NA NA

9/04 NA NA N A NA NA NA NA NA NA NA NA NA 1.0 UJ NA NA NA NA NA N A

* 11/07/04 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.4 N A N A N A NA NA NA NA

02/20/05 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.5 0.5 N A NA N A NA NA NA NA

05/01/05 NA NA NA NA 0.3 0.2 0.2 U 0.2 U 0.3 0 2 U 1.3 2.1 N A NA NA NA NA NA NA

07/31/05 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A N A NA NA NA

11/06/O5 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.3 N A NA N A N A NA NA N A

01/29/06 NA NA NA NA 0.2 U 02U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA N A

05/07/06 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A N A NA NA N A

03/19/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA N A

11/05/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A NA NA NA N A

02/10/07 NA NA N A NA 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U ND N A N A NA NA NA NA N A

04/29/07 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA N A

08/12/07 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA N A

10/28/07 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A NA NA N A

K*OPlJ>fDSAY\20i:v5_r>lfvCT»bJ«\9.1 Fun) ReportriApri BaiiDinI\TihLe»ATible J-Priv»ie We H (Privat *el)j)

JH3/20I-PlfE 1 of 10

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Table 5 Summary of Analytical Remits for Domestic, Irrigation, and Stock Wells Lindsay Manufacturing, LLC Lindsay, Nebraska

Specific Organic Analyses (fpg/L) Inorganic Analyses (me/L)

Well Identification Dale Collected pH

(field) pH

(lab)

Water Temperature

<°C) (field)

Conductivity (pmho/cm)

(field) 1,1-DCE 1,1-DCA U - D C E I J - D C A 1,1,1-TCA T C E P C E

Total Volatile


E P A M C L N E N E 7 N E 170 5 200 5 5 N E 0.005 0.05 0.3 0.05 5.0 250

Alternate Cleanup Level* On Property > 5.0 £5 .0 N E N E N E N E NE NE NE N E NE N E NE N E 10 NE NE 500

Alternate Cleanup Levef Of f Propertj >6.3 >6.3 N E N E N E N E NE NE NE NE NE N E NE NE 1 N E N E 400

Beller Domestic (AFF) 02/03/08 • N A N A N A N A 0.2 II 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA N A NA N A

continued 05/1 l/OS N A NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA N A

08/03/08 N A NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA N A

11/13/08 7.01 NA 12.5 775 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A N A NA NA N A

02/23/09 N A N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA N A NA N A

05/11/09 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U ND N A NA NA NA NA NA NA

08/11/09 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA N A

10/27/09 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A NA NA NA NA

02/02/10 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U. ND N A NA N A NA N A NA NA

05/18/10 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA N A NA NA

08/16/10 N A NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA NA

10/31/10 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA N A

02/09/11 6.91 NA 12.0 806 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA N A NA N A

05/15/11 N A NA N A N A '0.2 U 0.2 U 0.2 U 0.2 U 0.2 U -0.2 U 0.2 U ND N A NA NA NA NA NA N A

07/27/11 N A NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U ND N A NA N A NA N A NA NA

10/26/11 N A NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A N A NA NA

01/31/12 NA NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A N A NA N A

BelJer Domestic ( A L F ) 09/02 N A NA N A NA . 1.4 1.0U 1.0U I.OU 1.8 1.0 U 4.2 7.4 N A NA NA NA N A NA . NA

11/02 6.74 N A 14.0 902 1.8 1.0 1.0U I.OU 1.0 U I.OU 7 14 N A NA N A NA N A N A N A

8/03 6.87 N A 13.0 800 I .OU 1.0 u 1.0 U I.OU 1.0 U 1.0U 1.0U ND N A NA N A NA NA NA NA

11/03 6.73 NA 111 777 1.0 U 1.0 u I ou I.OU I .OU 1.0 U I .OU ND N A NA N A NA NA NA N A

2/04 6.64 NA 10 6 795 1.0U 1.0 u I.OU I.OU I.OU 1.0U I .OU ND N A NA NA NA NA NA N A

5/04 6.83 NA 12.3 764 1.0 U 1.0 U 1.0U I.OU I .OU 1.0 u 1.0U ND N A NA NA NA NA NA NA

8/04 7.00 N A 13.2 812 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA N A NA N A

9/04 N A NA N A N A N A N A NA NA NA NA NA NA 1.0 UJ NA NA NA NA NA N A

11/07/04 N A N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0 2 U ND 3.0 U l NA N A NA NA NA N A

02/20/05 N A N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U ND 5.0 U NA NA NA N A NA N A

05/01/05 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA N A f 07/31/05 N A N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 5.0 U NA NA N A N A NA NA

11/06/05 N A NA NA . N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 4.0 U NA N A NA N A NA NA

1/29 1/30/06 6.76 NA 11.4 732 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 4.0 U NA NA N A NA NA N A

05/07/06 N A N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA NA

08/19/06 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A . NA NA N A

11/05/06 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND L O U NA NA N A NA NA NA

02/10/07 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA NA

04/29/07 N A NA N A N A 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA N A N A N A NA N A

08/12/07 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA . NA NA NA

10/28/07 N A N A N A NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA N A NA N A NA NA

02/03/08 6.69 NA 13.4 832 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA N A

05/11/08 NA NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA N A

0B/03/08 6.72 N A 13.4 977 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA N A N A N A N A N A

11/13/08 7.03 NA 12.5 776 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA N A

02/23/09 6.67 NA 12.1 716 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A NA NA N A

05/11/09 7.23 NA 12.4 866 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A N A NA N A

08/11/09 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A NA NA N A

10/27/09 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA N A

02/02/10 NA N A N A NA 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A N A NA N A

05/18/10 N A N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 UJ NA NA N A NA NA NA

08/16/10 N A N A N A NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A N A NA NA

10/31/10 N A N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA N A

02/09/11 6.83 N A 12.8 802 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A NA NA NA

05/15/11 6.80 N A 12.4 . 784 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA N A N A N A NA N A

07/27/11 NA N A N A NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA NA

10/26/11 N A N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A NA N A NA

01/31/12 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

BeUer O ld Stock 09/02 NA NA NA NA 21 6.9 1.0 U 1.0 U 29 1.0 U 65 122 N A NA NA N A N A NA N A

11/02 6.75 N A 10 9 825 20 7.8 I.OU I.OU 30 1.0 U 8< 144 N A NA NA N A NA NA N A

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Table 5 Summary of Analytical Results for Domestic, Irrigation, and Stock Wells


Lindsay. Nebraska

Specific Conductivity (umho/cm)

(field)

Organic Analyses ((pg/L) Inorganic Anaivses (mg/L)

Well Identification Date Collected

pH

(field) pH

(lab)

Water Temperature

<°C> (field)


(field) 1,1-DCE 1,1-DCA U - D C E U - D C A 1,1,1-TCA T C E P C E Total Volatile


E P A M C L NE NE 7 N E 170 5 200 5 5 N E 0.005 0.05 0.3 0.05 5.0 250

Alternate Cleanup Lever On Property >5.0 >5.0 N E NE N E NE NE N E N E NE N E N E NE NE 10 N E N E 500

Alternate Cleanup Level Off Property >6.3 >63 N E NE NE N E NE NE NE NE N E N E NE NE 1 NE N E 400

Beller New Stock (G12201 J) 08/03 6.67 NA 142 720 33 15 1.0U 1.0U 47 1.3 130 226 N A NA NA N A N A N A N A

8/04 6.82 NA 16.6 771 20 8.8 I.OU 1.0U 23 I .OU 53 105 N A N A NA N A N A N A NA

11/08/04 . 6.91 6.76 J 10.5 863 38 16 1.5 I .OU 31 15 120 208 N A 0.002 U 0.005 U 0.05 U 0.005 U 0.033 69.1

02/22/05 6.70 NA 10.6 682 32 13 1.4 1.0 U 36 1.2 110 194 16 NA NA N A N A N A N A

05/01/05 6.61 6.82 J 10.7 691 23 9.3 1.2 1.0 U 33 I.OU 75 142 9.4 0.002 U 0.005 U 0.05 U 0.001 U 0.032 104

07/31/05 6.66 NA 15.1 888 38 14 2.0 1.0U 30 1.4 120 205 N A NA NA N A NA N A N A

11/06705 6.71 6.82 J 126 818 26 11 1.7 1.0U 27 I.I 82 149 N A 0.002 U 0.005 U 0.05 U 0.001 U 0.058 U 62.9

01/29/06 6.72 NA 9.5 742 38 15 2.5 I.OU 42 1.4 110 209 23 N A NA N A N A N A NA

05/07/06 6.60 6.82 J 11.7 857 25 10 l.S I.OU 23 1.0 80 141 17 0.002 U . 0.005 U 0.05 U 0.002 0.051 84.4

08/19/06 6.76 NA 14.9 848 11 5.8 • I.I 1.0 u 12 1.0 u 28 53 8.3 NA NA N A N A N A NA

11/05/06 6 84 NA 11.4 709 4.5 2.3 0.6 U 0.6 U 4.8 0.6 U 14 26 9.1 NA NA N A N A N A NA

02/10/07 6. SO NA 8.8 761 7 J 3.9 1.0 0.6 U 9.3 0.6 U 22 44 5.6 NA NA N A NA N A NA

04/29/07 6.62 6.77 J 12.2 821 22 11 2.1 0.6 U 21 0.8 54 111 12 0.002 U 0.005 U 0.05 U 0.002 U 0.08 73.0

08/12/07 6.86 6.92 J 12.3 919 5.0 2.5 0.4 0.2 U 4 6 0.2 16 29 4.0 0.002 U 0.005 U 0.05 U 0.001 U 0.04 U 45.1

10/28/07 6.68 NA 12.1 667 6 5 3.0 1.0 u 1.0 U 4.8 I.OU 18 32 5.5 N A NA N A NA N A NA

02/03/08 6.61 NA 9.2 820 8.1 3.7 0.8 0.2 U 8.0 0.3 19 40 5.0 NA NA N A NA N A NA

05/11/08 6.70 NA 11.8 650 13 5.8 1.3 0.2 U 13 0.5 30 64 6.2 NA NA N A NA N A N A

08/03/08 6.68 NA 12.9 975 11 5.0 1.1 0.2 U II 0.4 28 57 5.7 NA NA N A NA N A NA

1I/16/0S 6.87 NA 12.2 906 4.1 2.1 0.4 0.2 U 4.2 0.2 U 11 22 2.6 NA NA N A N A N A NA

02/23/09 6 83 NA 9.1 705 5.2 2.8 0.7 0.2 U 6.3 0.2 12 27 4.3 NA NA N A NA N A N A

05/07/09 7.00 NA 13.0 828 12 5.3 I.I 0.2 U 12 0.4 28 59 7.8 NA NA N A NA N A NA

08/1 1/09 7.09 NA 14.8 916 2 2 1.2 0.2 0.2 U 2.0 0.2 U 7.2 13 2.4 NA NA N A N A N A NA

10/27/09 6.73 NA 14.8 824 2.4 1.4 0.3 0.2 U 2.6 0.2 U 6.8 14 2.0 U NA NA N A NA N A NA

02/02/10 6 86 NA 10.9 778 6 8 3.4 0.8 0.2 U 7.2 0.2 14 32 3.3 NA NA N A N A N A NA

2/2/2010 (DUP) 6.86 NA 10.9 778 6.6 3.3 0.8 0 2 U 7.2 0.3 14 32 NA NA NA NA N A N A NA

05/18/10 6.67 NA 12.4 780 7.0 3.2 0.7 0.2 U 6.6 0.3 16 34 5.6 N A NA N A NA N A NA

08/16/10 6.87 NA 14.0 785 4 0 0.2 U 0.4 0.2 U 3.7 0.2 U 8.6 17 2.7 NA NA N A N A N A NA

10/31/10 6.60 NA 12.6 659 4.7 2 2 0.5 0.2 U 4.4 0.2 U 9.6 21 3.5 NA NA N A N A N A N A

02/14/11 NA NA N A N A 5.8 2.4 0.6 0.2 U 5.2 0.2 U 10 24 2.0 U N A NA N A NA N A NA

05/31/11 6.48 NA 13.2 592 5 5 2.0 0.5 0.2 U 4.7 0.2 U 11 24 2.5 N A NA NA NA N A NA

07/24/11 6.59 NA 14.0 664 8.8 2.9 0.6 0.2 U 6.5 0.2 15 34 2.9 NA NA N A N A N A NA

10/26/11 6.25 NA 12.0 641 2.5 1.2 0.4 0.2 U 2.8 0.2 U 4.8 12 2.0 U 0.002 U 0.005 U 0.05 U 0.0015 0.08 64.3

01/31/12 6.32 NA 1 I I 484 2.9 1.2 0.3 0.2 U 2.6 0.2 U 4.5 12 2.0 U N A NA N A NA N A NA

Beller East Irrigation (06753?) 08/03 6.81 NA 13.9 535 1.0 U I .OU 1.0 U 1.0U 1.0 U 1.0U 1.0U ND N A NA NA NA N A N A NA

1/04 6.85 NA 12.3 507 I.OU 1.0U 1.0 u I.OU 1.0U 1.0U 1.0 U ND NA NA NA NA NA N A NA

8/04 N A NA NA NA 0.2 U 6.2 U , 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A N A NA

07/31/05 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A N A N A

11/08/05 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA NA N A NA

08/22/06 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A NA N A NA

Beller Irrigation (#$4278) 8/03 631 NA 13.9 535 I.OU I.OU 1.0 U 1.0U 1.0 U I.OU 1.0 U ND N A N A NA NA NA N A NA

8/04 N A NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 NA NA NA N A NA N A NA

11/08/04 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A NA N A NA

Belltr Irrigation (#54278) Retro to Stock Well 02/20/05 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U ND NA NA NA N A NA N A N A

05/01/05 NA NA NA N A . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA " N A N A NA

07/31/05 NA NA NA NA 0.7 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 1.0 NA NA NA NA NA N A N A

11/06/05 NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.8 NA NA NA N A N A N A N A

01/29/06 NA NA N A NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.7 NA N A NA NA N A N A NA

05/07/06 NA NA NA NA 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.5 NA NA NA N A NA N A NA

08/19/06 N A NA NA NA 1.1 0.2 U 0.2 U 0.2 U 0 4 0.2 U 0.9 2.4 NA NA NA N A NA N A NA

11/05/06 NA NA NA N A 0.7 0.2 U 0.2 U 0.2 U 0.2 0.2 U 0.6 1.5 N A NA NA N A N A N A N A

02/10/07 N A NA N A NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.8 NA NA NA NA NA N A NA

04/29/07 NA NA N A NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.7 NA NA NA N A NA N A NA

08/12/07 NA NA N A NA I I 0.2 U 0.2 U 0.2 U 0.4 0.2 U 0.9 2.4 N A NA NA NA NA N A NA

10/28/07 NA NA NA N A 0.8 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.6 J 1.4 N A NA NA NA NA N A NA

02/03/08 NA NA NA NA 0.5 0 .2U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.9 NA N A NA NA NA N A NA

05/11/08 NA NA NA NA 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.2 N A N A NA N A N A N A NA

08/06/0S NA NA NA NA 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 0.8 N A NA NA N A NA N A NA

11/17/08 NA NA N A NA 0.5 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 0.8 NA N A NA N A N A N A N A

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Table 5

Summary of Analytical Results for Domestic, Irrigation, i n d Stock Wells


Lindsay, Nebraska

Specific Organic Analyses ({ug/L) Inorganic Analyses (mg/L)


(field) pH

(lab)

Water Temperature

(°C) (neld)

Conductivity (umho/cm)

(field) 1,1-DCE 1,1-DCA 1,2-DCE 1,2-DCA 1,1,1-TCA T C E P C E

Total Volatile Organics M-Dloxane Cadmium Chromium Iron Lead Zinc Sulfate

E P A M C L N E NE 7 N E 170 5 200 5 5 N E 0.005 0.05 0.3 0.05 5.0 250

Altera i le Cleanup Level On Property >5.0 >5.0 N E NE N E NE NE NE N E NE N E NE • NE NE 10 NE NE 500

Alternate Cleanup Level OIT Property >6.3 >6.3 N E NE N E N E NE NE N E N E N E NE NE NE 1 NE NE 400

Beller Irrigation (#542781 Retro to Stuck Well 02/18/09 NA N A N A N A 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A NA NA N A

continued 05/06/09 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

08/11/09 NA NA NA NA 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.4 - N A NA NA NA NA NA N A

10/28/09 NA NA N A N A 0.2 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0 2 0.4 NA NA NA NA . NA N A . N A

02/02/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

05/IS/IO NA N A NA NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U N D N A NA NA NA NA NA N A

08/16/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA N A

10/31/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA N A NA NA N A

02/14/11 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U ND NA NA NA NA NA NA N A

06/06/11 N A N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A N A N A

08/02/11 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A . NA NA NA N A

11/14/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA N A

01/31/12 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA N A

Belter Stock Tank Pen #6 11/08/04 NA NA NA NA 29 14 1.4 1.0 U 27 1.3 120 193 NA NA NA . N A NA NA N A

02/20/05 N A NA NA NA 25 11 1.5 I.OU 29 1.0 88 156 14 NA NA NA NA NA N A

Beller Stock Tank Pen »1 11/08/04 NA NA N A N A 31 15 1.4 1.0U 27 1.3 110 186 NA NA NA NA NA NA N A

02/20/05 NA NA NA N A 22 10 1.4 1.0 U 26 0.9 J 76 136 15 NA NA NA NA NA NA

Premier's Domestic 200] (BFF) 8/03 6.89 7.10J 13.2 729 . 2.4 I.OU 1.0 U I.OU 4.7 I .OU 3.3 10 N A 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 53

11/03 6.84 7.06 J II.1 691 1.4 1.0 U I.OU I.OU 2.6 1.0U 1.5 5.5 NA 0.002 U 0.005 U 0.05 U 0.002 0.047 44

2/04 6.82 6.92 I 10.8 698 I.I I .OU 1.0 u I.OU 1.6 I.OU 1.3 4.0 NA 0.002 U 0.005 U 0.05 U 0.013 0.010 J 45

5/04 6.93 7.07 J 12.1 682 1.0 U I .OU . 1.0 u 1.0 u 1.0 U 1.0 U 1.6 1.6 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.008 52.6

8/04 7.06 7.09 12.0 740 1.0 0.5 0.2 V 0.2 U 1.8 0.2 U 1.4 4.7 NA 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 46.2

9/04 NA N A NA NA N A NA NA NA NA NA NA . NA I.I J NA NA N A NA NA N A

11/07/04 6.73 7.11 J 13.4 695 0.6 0.4 0.2 U 0.2 U 1.0 0.2 U 0.9 2.3 2.5 U) 0 002 U 0.005 U 0.05 U 0.001 U 0.006 U 43.4

02/20/05 6.96 6.97 J 12.1 719 0.6 0.4 0.2 U 0.2 U 0.8 J 0.2 U 0.8 1.2 5.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 43.6

02/20105 IDUT) 6.96 N A 12.1 719 0.7 0.4 0.2 U 0.2 U 0.8 0.2 U 0.8 2.0 N A N A NA N A N A NA N A

05/01/05 6.88 7 18 J 11.2 , 641 0.6 0.4 0.2 U 0.2 U 0.9 0.2 U 0.8 2.7 1.7 J 0 002 U 0.005 U 0.05 U 0.014 0.006 U 46.5

05/1/05 (DUP) 6.88 NA 11.2 641 0.6 0.4 0.2 U 0.2 U 0.8 0.2 U 0.8 2.6 NA NA NA NA NA NA N A

08/01/05 6.89 7.05 12.1 770 0.3 0.4 0.2 U 0.2 U 0.6 0.2 U 0.4 1.7 5.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 39.3

03/1/05 (DUP) 6.88 7.13 13.1 . 807 0 3 0.3 0.2 U 0.2 U 0 6 0.2 U 0.4 1.6 5.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 36.6

11/06/05 6.97 7.11 J 11.4 699 0.2 U 0.4 0.2 U 0.2 U 0.2 U 0.2 U 0.2 0.6 4 0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.006 U 38.9

01/29/06 6.98 7.06 J 11.9 619 0.2 U 0.4 0.2 U 0.2 U 0.3 0.2 U 0.2 0.9 4.0 U 0.002 U 0.005 U 0.O5U O.00I 0.006 U 36.1

05/07/06 6.92 7.07 J 1 1.4 748 0.2 U 02 0.2 U 0.2 U 0.2 0.2 U 0.2 U 0.4 2.0 U 0.002 U 0.005 U 0.05 U 0.001 0.011 36.3

08/19/06 6.95 7 06) 12.5 754 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 2.0 U 0.002 U 0.005 U 0.05 U 0.001 u 0.044 104

8/19/06 (DUP) NA NA NA NA 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 2.0 U N A NA NA NA NA N A

11/05/06 6.86 6 97 J 11.7 638 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 2.0 U 0.002 U 0.005 U 0.05 U 0.001 0.011 U 33.3

11/5/06 (DUPI 6.86 N A 11.7 638 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 N A N A NA NA NA NA N A

02/10/07 7.00 7.03 J 11.3 679 0.2 U 0 3 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 2 0 U 0.002 U 0.005 U 0.050 U 0.001 U 0.01 J+ 39.4

2/10/07 (DUP) 7.00 NA 11.5 679 0.2 U 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 NA N A NA NA NA NA N A

04/29/07 6.93 7.06 11.9 724 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 2.0 U 0.002 U 0.005 U 0.05 U 0.002 U 0.01 U 37.8

4/29/07 (DUP) 6.93 NA 11.9 724 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 NA N A NA N A NA NA N A

08/12/07 7.03 6.93 J 12.3 835 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0001 U 0.01 U 39.2

8/12/07 (DUP) 7.03 N A 12.3 835 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND NA NA NA . N A NA NA N A

10/28/07 6.86 6.93 I 12.1 603 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 2.0 U 0.002 U 0.005 U 0.05 U 0.002 0.01 U 37.6

10/28/07 (DUP) 6.86 N A 12.1 603 0.2 U 0.2 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 NA NA NA N A NA NA N A

02/03/08 6.94 7.34 J 14.6 702 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 39.8

02/03/08 (DUP) 6.94 NA 14.6 702 0.2 U 0.3 0 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

05/11/08 6.77 6.99 J 11.7 566 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0 005U 0.05 U 0.001 u 0.01 U 37.1

5/11/08 (DUP) 6.77 N A 11.7 566 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA N A NA NA NA NA N A

08/03/08 6.90 7.20 J 12.2 856 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0 001 U 0.01 U 38.2

08/03/08 (DUP) 6.90 NA 12.2 856 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A NA NA N A

11/14/08 7.07 7.16 13.7 653 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0 002 U 0.005 U 0.05 U 0.001 u 0.01 U 35.8

11/14/08 (DUP) 7.07 NA 13.7 653 0.2 U 0.2 U 0.2 U 0.2U 0.2 U 0.2 U 0.2 U NO NA N A NA N A NA NA N A

K.WS\XJNDSAYU012'i9 DtfnernbleiW. I Final ReporaVApril Bi»aanI\Tabli;rtT»ble S-Pnviie Weill (Privwe welU) 3/23/201

Pije*ori0 UR8 Corporation

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Tabic 5 Summary of Analytical Results Tor Domestic, Irrigation, and Stock Wells Lindsay Manufacturing, LLC Lindsay, Nebraska

Specific Conductivity (pmbo/cm)

(field)

Organic Analyses ((ug/L) Inorganic Analyses (mg/L)

Well Identification Date Collided pH

(field)

pH

(lab)

Waler Temperature

(°C) (field)

Specific Conductivity (pmbo/cm)

(field) 1,1-DCE 1,1-DCA l , 2 - D C E 1,2-DCA 1,1,1-TCA T C E P C E

Total Volatile Organics M-Dioiane Cadmium Chromium Iron Lead Zinc Sulfate

EPA MCL NE NE 7 N E 170 5 200 5 5 NE 0.005 0.05 0.3 . 0.05 . 5.0 250

Alternate Cleanup Levef On Property 2 5.0 >5.0 NE NE NE NE NE N E NE N E NE NE NE N E 10 N E NE 500

Alternate Cleanup Levef -Off Property >6.3 2 6.3 NE NE N E NE NE N E N E N E NE NE NE N E 1 NE NE 400

Prelster's Domestic 2003-(BFF) 02/23/09 6.87 7.271 11.4 607 0.2 U 0.2 U 0.2 U 02 U 0 2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0 001 U 0.01 U 38

2/23/09 (DUP) 6.87 NA 11.4 607 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA NA NA N A

05/11/09 7.44 7.03 J 11.6 734 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 39.6

5/11/09 (DUP) 7.44 NA 11.6 734 0 2 U 0 2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND NA NA N A NA NA NA N A

08/12/09 6.92 7.10 12.8 778 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.00 IU 0.01 u 37.0

8/12/09 (DUP) 6.92 NA 12.8 778 0.2 U 0.2 U 0.2 U 0 2 U 0 2 U 0.2 U 0.2 U ND NA NA N A NA NA NA N A

10/27/09 7.02 7.06 12.7 764 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.O05 U 0.05 U 0.00 IU 0.01 U 36.3

10/27/09 (DUP) 7.02 NA 12.7 764 0.2 U 0.2 U 0.2 U 0 2 U 0 2 U 0.2 U 0.2 U ND NA NA NA NA NA N A N A

02/02/10 7.03 7.09 11.7 663 0.2 U 0 2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 38.3

02/02/10 (DUP) 7.03 7.03 11.7 663 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 u 39.7

05/18/10 6.96 6.99 J 11.8 683 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 u 39.3

5/18/10 (DUP) 6.96 NA 11.8 683 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA N A

08/16/10 7.14 NA 119 726 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 39.5

8/16/10 (DUP) 7.14 NA 11.9 726 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND NA NA NA NA NA NA N A

10/31/10 6.94 NA 11.5 595 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 36.5

10/3I/I0(DUP) 6.94 NA 11.5 595 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.001 U 0.01 U 36.6

02/09/11 6.88 NA 11.9 536 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U • 0.05 U 0.001 U 0.01 U 37.6

02/09/11 (DUP) 6.88 NA 11.9 536 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA N A NA N A

05/15/11 6.94 NA 12.0 646 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.O0O1 U 0.01 U R

05/15/11 (DUP) 6.94 NA 12.0 646 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U .0.2 U 0 2 U ND 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U 26 J

07/27/11 6.75 NA 13.1 693 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0.005 U . 0.05 U 0.0001 u 0.02 35.5

07/27/11 (DUP) 6.75 NA 13.1 693 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND NA NA N A NA N A NA 35.5

10/27/11 7.01 NA 11.7 594 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U 0.002 U 0 0 0 5 U 0.05 U 0.0001 u 0.01 U 35.8

10/27/11 (DUP) 7.01 NA 11.7 594 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA NA NA N A

01/30/12 6.90 NA 11.7 590 0 2 U 0.2 IJ 0 2 U 0 2 U 0.2 U 0.2 U 0.2 U • ND 2.0 U 0.002 U 0.005 U 0.05 U 0.0001 U 0.01 U 37.0

1/30/12 (DUP) 6.90 NA 11.7 590 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA NA N A N A

Preiser's Domestic 2003 (AFF) 8/03 6.92 NA 13.3 711 I .OU I.OU 1.0 U 1.0U 1.0 U . I.OU 1.0 U ND NA N A NA NA N A NA NA

11/03 N A NA NA NA 1 0 U I.OU 1.0U 1.0 U 1.0U I.OU 1.0 U ND NA N A NA NA N A NA NA

2/04 6.69 NA 12.3 697 . I .OU 1.0 u 1.0U 1.0U 1.0U 1.0U 1.0U ND NA N A N A NA NA NA . N A

5/04 6.99 NA 12.1 690 1 O U I.OU I .OU 1.0U 1.0U I.OU 1 0 U ND NA NA NA NA N A NA N A

8/04 7.17 NA 11.7 747 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U ND NA N A NA NA N A NA NA

9/04 NA NA NA NA NA NA NA NA NA NA NA NA 1.0 UJ N A NA NA N A NA NA

11/07/04 N A NA NA NA 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A NA NA .

02/20/05 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U ND NA N A NA NA N A NA NA

05/01/05 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA NA NA NA

07/31/05 N A NA NA NA 0 2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A NA NA

11/06/05 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A NA NA

01/29/06 N A NA NA NA 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A NA NA

05/07/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA NA N A NA •

08/19/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA NA . NA •NA

11/05/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA N A NA NA

02/10/07 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA, NA • NA NA

04/29/07 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA NA NA NA


10/28/07 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 u 0.2 U 0.2 U 02 U ND NA N A NA NA NA NA NA

02/03/08 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A N A NA NA

05/11/08 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND NA • N A NA NA N A NA NA

08/03/OS NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A NA NA

11/14/08 6.99 NA 11.7 661 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A N A NA NA NA

02/23/09 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A N A NA NA

05/11/09 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A N A NA NA NA

08/12/09 N A NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A N A N A NA NA

10/27/09 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A N A N A NA NA

02/02/10 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A • NA NA

05/18/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A N A NA NA

08/16/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A N A NA NA


02/09/11 6.96 NA 13.3 544 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U ND NA N A NA N A N A N A NA

05/15/11 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA NA NA NA

07/27/11 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A . N A NA NA NA NA

10/27/11 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A NA NA NA

01/30/12 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA NA N A NA

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Table 5

Summary of Analytical Results for Domestic, Irrigation, and Stock Wells


Lindsay, Nebraska

Specific Organic Analvses ((pg/L) Inorganic Analyses (mg/L)


(field) pH

(lab)

Water Temperature

(°C) (field)

Conductivity

(umho/cm)

(field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA T C E P C E

Total Volatile

Organics 1,4-Dioxane Cadmium Cbromium Iron Lead Zinc Sulfate

EPA M C L NE N E 7 N E 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0 250

Alternate Cleanup Level* On Property >5.0 >5.0 N E N E NE N E NE NE NE NE NE N E NE NE 10 NE NE 500

Alternate Cleanup Level Off Property £6 .3 >6.3 N E NE NE N E NE NE NE N E N E NE NE NE 1 N E NE 400

Prrister's Domestic 2003 ( A L F ) 08/03 6.79 N A 12.4 732 1.0U 1.0U I.OU 1.0U I.OU 1.0U 1.0U ND NA NA NA NA NA NA N A

11/03 6.87 7.I0J 10.0 699 1.0U I .OU I.OU I.OU I .OU 1.0 U 1.0 U ND NA 0.002 U 0.005 U 0.05 U 0.001 U 0 006 U 42

02/01/04 6.70 N A 13.0 6S5 I.OU I .OU I.OU I.OU I .OU I .OU I.OU N D NA NA NA NA N A N A NA

05/01/04 7.11 N A 13.0 685 1.0U 1.0 U 1 OU I.OU 1.0 U I.OU 1.0 U N D NA NA NA NA N A NA NA

08/01/04 7.26 N A 11.8 747 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D N A NA NA N A NA NA N A

09/01/04 NA N A N A N A NA N A NA NA NA N A NA N A 1.0 UJ NA NA NA N A NA N A

11/07/04 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 1.0 UJ NA NA NA NA NA N A

02/20/05 NA N A NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U ND 5.0 U NA NA NA N A NA N A

05/01/05 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A NA NA

07/31/05 N A N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 5.0 U NA NA NA NA NA N A

11/06/05 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 4.0 U NA N A N A N A NA N A

1/29 1/30/06 6.96 NA 118 611 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 4.0 U NA NA NA NA NA NA

05/07/06 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

08/19/06 NA NA N A NA 0.2 U 0.2 U . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA NA

11/05/06 NA NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA N A

02/10/07 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA , NA NA N A NA N A

04/29/07 N A N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U N A N A NA N A N A N A

08/12/07 NA N A N A NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA N A

10/28/07 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA N A N A N A NA

02/03/08 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA NA

05/11/08 6.87 N A 12.2 55S 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D 2.0 U NA NA NA NA NA N A

OS/03/08 NA N A NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D 2.0 U NA NA NA NA NA N A

11/14/08 7.08 N A 12.0 662 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA N A

02/23/09 7.00 NA 12.1 609 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U N D 2.0 U NA NA NA NA NA N A

05/11/09 . 7.36 N A 11.7 733 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U N D 2.0 U NA NA NA NA NA N A

08/12/09 7.36 N A 17.8 790 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA NA

10/27/09 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D 2.0 U NA NA NA NA NA N A

02/02/10 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA N A

05/15/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A NA NA

08/16/10 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA N A

10/31/10 NA N A NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D 2.0 U N A NA NA NA NA N A

02/09/11 7.18 N A 12.7 553 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D 2.0 U NA NA NA NA NA NA

05/15/11 7.15 NA 111 645 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA NA NA N A

07/27/11 NA NA N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

10/27/11 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 2.0 U NA NA NA N A N A NA

01/30/12 NA NA NA N A 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA NA NA NA

Preiser 's Stock 10/02 NA N A NA NA 1 0 U I.OU 1.0 U I.OU 1.0 U 1.0 U 1.0 U N D NA NA NA NA NA NA NA

08/03 6.91 NA 14 695 I .OU 1.0 U 1.0 U I.OU 1.0 U I .OU 1.0 U ND NA NA NA NA NA NA N A

8/04 7.18 NA 12.8 724 0.2 U 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 NA NA NA NA N A NA N A

07131/05 N A N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A N A N A N A N A

Preister'j Old Irrigation 02/03 NA NA NA NA 1.0 U I .OU 1.0U I.OU 1.6 I .OU 3.4 5.0 NA NA NA NA NA NA NA

08/03 6.56 NA 13 749 1.3 I .OU 1.0U 1.0U 2.0 I .OU 5.4 8.7 NA NA NA NA NA NA NA

8/04 NA N A NA N A 0.5 0.4 0.2 U 0.2 U O.S 0.2 U 2.5 4.2 NA NA NA NA NA . N A NA

Old Moravec Domestic 10/02 NA NA NA NA 1.0 U 1.0U 1.0 U I.OU 1.0 U 1.0 U 1.0 U ND NA NA NA NA N A NA N A

12/02 NA N A N A N A I .OU 1.0U 1.0U 1.0U 1.0U 1.0U 1.0U ND NA N A NA NA N A N A N A

08/03 NA N A NA NA 1.0 U I.OU I.OU I.OU 1.0 U I .OU 1.0U ND NA NA NA N A NA NA N A

8/04 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

07/31/05 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A NA N A

08/20/06 N A N A N A NA . 0.2 U 0.2 U 0.2 U 02 J 0.2 U 0.2 U 0.2 U 0.2 NA NA NA NA NA NA N A

11/07/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A NA NA

02/21/07 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A N A

04/30/07 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U ND NA NA NA NA N A NA N A

Doug Beller Domestic 10/02 NA N A NA N A 1.0 U I .OU 1.0U I.OU 1.0 U 1.0 U 1.0 U ND NA NA NA NA N A NA NA

Weylan Neal Irrigation (G31798) 08/03 NA N A NA N A 21 1.5 1.0U I.OU 40 1.0 U 18 81 NA NA NA NA N A NA N A

4/04 NA NA N A NA 14 1.0U 1.0U 1.0U 20 J 1.0U 14 48 NA NA N A NA N A NA N A

8/04 NA NA NA NA 23 1.6 1.0U 1.0U 36 1.0 U 20 81 NA NA N A NA N A NA NA

11/09/04 N A N A NA NA 27 1.7 I.OU 1.0U 34 I .OU 22 85 NA NA NA NA N A N A N A

08/02/05 N A NA NA NA 24 1.6 07 0.6 U 43 0.6 U 23 92 NA NA NA NA N A N A N A

1 1/27/07 by EPA NA NA NA NA * 16 I.OU I.OU I.0.U I7J 1.0U 13 46 NA NA NA NA N A N A N A

08/03/08 N A NA NA NA 6.5 0.4 0.2 U 0.2 U 8.2 0.2 U 4.3 11 NA NA N A NA N A NA N A

K.\O05\UNDSATV01^_r>lA'tnbl»W. FLu ReporuVApn BbnwnJ\T4bIa\Tiblt 5 -Pmm WCUJ (fvi.-rtc well.) 1/21/3012 U R S Corporat l t

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Table 5 Summary of Analytical Results for Domestic, Irrrgi l lon, and Stock Wells


Lindsay, Nebraska

Specinc Organic Analyses ((pg/L) Inorganic Analyses (mg/L)

Well Identification Date Collected

pH

(field)

pH

(lab)

Water Temperature

<°C) (field)

Conductivity

(umho/cm)

(field) 1,1-DCE 1,1-DCA U - D C E 1,2-DCA 1,1,1-TCA T C E P C E

Total Volatile

Organics 1,4-Dioaane Cadmium Chromium Iron Lead Zinc Sulfite

E P A M C L NE N E 7 NE 170 5 200 5 5 N E 0.005 0.05 0.3* 0.05 5.0 250

Alternate Cleanup Level On Property > 5.0 >5.0 NE NE NE NE NE NE NE NE N E N E N E NE 10 . N E NE 500

Alternate Cleanup Level* Off Property >6.3 >6.3 NE N E NE NE NE NE N E NE NE N E N E NE 1 N E NE 400

Anthony KJasseo Irrigation (G33172) 08/03 N A NA NA NA 1.0 U 1.0U 1.0U 1.0U I.OU I.OU I .OU ND N A N A NA NA N A NA NA

4/04 N A NA N A NA 1.0U I.OU 1.0U I.OU 1.0 UJ 1.0U I .OU ND N A N A N A NA N A NA NA

S/04 . N A NA N A N A 0.6 0.2 U 0.2 U 0.2 U 1.0 0.2 U 0.5 2.1 N A N A NA NA NA NA NA

11/09/04 N A NA N A N A 0.6 0.2 U 0.2 U 0.2 U 1.1 0.2 U 0.7 1.8 N A N A NA N A N A NA NA

08/01/05 N A NA N A N A 0.7 0.2 U 0.2 U 0.2 U 1.2 0.2 U 0.7 2.6 N A N A NA N A NA NA NA

John Klai ien Irrigation (G56241) 08/03 N A NA NA N A I.OU 1.0U I.OU I.OU I.OU I.OU 1.0 U ND N A N A NA NA N A NA N A

4/04 N A NA NA N A 1.0U I.OU 1.0U I.OU 1.0 UJ 1.0U 1.0 U ND N A N A N A N A NA NA NA

8/04 N A NA NA N A 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ 0.2 UJ ND N A N A NA NA N A NA NA

11/09/04 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A N A NA NA NA

07/31/05 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U .0.2 U ND N A N A NA N A N A NA NA

* 08/20/07 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA NA N A NA NA

J im Klassen Domestic S/03 N A NA NA N A 1.0U I.OU I.OU I.OU I.OU I.OU 1.0 U ND N A N A N A NA NA NA NA

08/02/05 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A N A N A NA NA

11/08/05 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA NA N A NA NA

01/31/06 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA NA NA NA NA

05/09/06 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA


.; 11/07/06 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

02/21/07 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U 0.2 U ND N A N A NA N A . N A NA NA

04/30/07 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U ND N A N A NA N A N A NA NA

08/14/07 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND N A N A N A N A N A NA NA




08/03/03 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

11/16/08 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

02/23/09 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA .

05/11/09 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

08/11/09 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA NA N A NA NA


02/03/10 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U . ND N A N A NA N A N A NA NA

05/19/10 N A NA NA NA • 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A • NA NA

08/16/10 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA N A NA NA

11/02/10 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA NA N A NA NA

02/14/11 N A NA NA NA 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA



02/01/12 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

J im Klassen Irrigation 8/03 N A NA NA NA 1.0U 1.0U I.OU 1.0U 1.0 U I.OU 1.0 U ND N A N A NA N A N A NA NA

08/01/05 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A N A NA

08/20/06 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

08/20/07 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A N A NA

08/03/08 N A NA NA • N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A • N A N A NA

08/01/11 N A NA NA NA 0.2 U • 0 . 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

Klassen Southeast Irrigation 08/08/05 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

Ron Pfeifer Domestic 10/02 N A NA NA N A 1.0U I.OU 1.0U I.OU I .OU 1.0U 1.0U ND N A N A NA N A N A NA NA

2/03 N A NA NA NA I.OU I.OU I.OU I.OU I.OU 1.0U 1.0 U ND N A N A NA N A N A NA NA

08/03 N A NA NA N A 1.0 U I.OU I.OU I.OU I.OU 1.0U 1.0U ND NA N A NA N A N A NA NA

8/04 N A NA NA N A 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA

08/03/05 N A NA NA N A 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA


01/31/06 N A NA NA N A 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A NA NA


08/20/06 N A NA NA N A 0.2 U • 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA


02/21/07 N A NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U l 0.2 U 0.2 U 0.2 U ND N A N A N A N A N A NA NA

04/30/07 NA NA NA N A 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA NA N A N A NA

08/14/07 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

10/31/07 N A NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA NA


05/13/08 NA NA NA N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A NA N A NA NA


11/16/08 N A NA NA N A 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A • NA N A N A NA NA

K W5\UNDSAY\2Q12« D«*verible-i\9 I FBMJ R<?poru\Apnt BiumwnTibleiVTibk S-Priraie Weil (Privnr veils)

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Table 5 Summary of Analytical Result's: for Domestic, Irrigation, and Stock Wells Lindsay M in u fa during, LLC Lindsay, Nebraska

Specific Conducttvlty (pmho/cm)

(field)

Organic Analyses ((ug/L) Inorganic Analyses (mg/L)

Well Identification Date Collected pll

(field) pH

(lab)

Water Temperature

(°C> (field)

Specific Conducttvlty (pmho/cm)

(field) 1,1-DCE 1,1-DCA U-DCE 1,2-DCA 1,1,1-TCA T C E PCE Total Volatile

Organics 1,4-Dloiane Cadmium Chromium Iron Lead Zinc Sulfate

EPA M C L NE NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0 250

Alternlte Cleanup Levef Oo Property >5.0 >5.0 NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Level* Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE 1 NE ^ NE 400

Ron Pfeifer Domestic 02/23/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA N A NA N A NA

continued 05/11/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A NA

08/11/09 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A NA

10/27/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A N A N A

02/03/10 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U N D NA NA NA NA N A N A N A

05/19/10 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D NA NA N A NA N A N A NA

02/14/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A NA

05/31/11 N A N A NA NA 0.2 U 0 2 U 0.2 U 0 .2 U 0.2 U 0.2 U 0.2 U ND NA N A N A N A N A N A N A

07/28/11 NA N A NA NA . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA. NA NA NA N A • N A N A

10/25/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A N A N A

02/01/12 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 V ND NA NA N A NA N A N A N A

Roo Pfeifer Irrigation (G68239) 08/03 NA N A NA NA 1.0 U I.OU 1.0 u I.OU 1.0 U I.OU 1.0 U ND NA NA NA N A N A N A NA

S/04 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 V 0.2 U 0.2 U ND N A N A N A N A N A N A N A

05/05/05 NA N A NA • NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A NA NA

08/03/05 NA N A NA NA 0.2 0 0.2U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A N A N A

08/20/07 NA NA NA NA 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA N A N A N A

08/07/08 • NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA N A N A N A N A

05/11/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA N A N A NA

08/01/11 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A NA NA

Ben Pfelfer Domestic 2/03 NA N A NA NA 1.0 U 1.0U I.OU 1.0U 1.0 U 1.0 u 1.0 U ND NA NA NA NA N A N A NA

Ricbard Wagner Irrigation 8/03 NA N A NA NA 1.0 U I.OU 1.0U I.OU 10 U I.OU 1.0 U ND NA NA NA NA N A N A N A

8/04 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A N A

05/05/05 NA N A NA NA 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A N A


Martischanc, Irrigation S/04 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA N A N A

11/10/04 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 u 0.2 U 0.2 U 0.2 U ND NA NA NA N A N A N A N A

07/31/05 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA N A N A

Tom JareckJ Domestic 08/03 NA N A NA NA 1.0 U 1.0 U I.OU 1.0U I.OU I.OU 1.0 U ND NA NA NA NA N A N A N A

3/04 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND NA N A N A NA N A N A N A

05/02/05 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA N A N A

07/31/05 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA N A N A NA

11/08/05 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A N A NA

01/31/06 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A N A NA


08/20/06 NA NA NA . NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A NA

11/07/06 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D NA NA NA NA N A N A N A

02/21/07 NA NA NA NA 0.2 U 0.2 U 0.2 y 0 2UJ 0.2 U 0.2 U 0.2 U N D NA NA NA NA N A N A N A

04/30/07 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A NA NA

08/13/07 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U ND NA N A NA NA N A N A NA

10/31/07 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA N A N A NA

02/O5/O8 NA N A NA NA 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A NA

05/13/08 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A NA

08/03/08 N A N A NA NA 0.2 U V 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A N A NA N A N A N A

11/16/08 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A N A N A NA

02/23/09 NA . N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

05/11/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A NA

08/11/09 NA N A NA NA 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U , 0.2 U ND NA NA NA N A NA N A N A

i 0/27/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND NA NA N A NA NA N A N A

02/03/10 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

05/19/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

OS/16710 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A N A

11/02/10 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U • 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

02/14/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

05/31/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 02 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

07/28/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND . NA N A NA NA N A N A N A

10/25/11 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA N A N A N A

02/01/12 • NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA NA N A N A N A

Ed Loetkenhaus Domestic 2/03 NA N A NA NA 1.0 U I.OU 1.0U I.OU 10 U 1.0U 1.0U ND NA N A NA NA N A N A NA

K >00S\LnTOSAT^0i:^L>Lvfribk^9.1 Foul fttpaftfApnl BtJuiaxjJsT»bkj\Ttblf 5-Pnvne Welli (Pm-ilx 1/23/3012

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Table 5 Summary of Analytical Results for Domestic, Irrigation, aud Stock Wells Lindsay Manufacturing LLC Lindsay, Nebraska


(field)

Organic Analyses ((pg/L) Inorganic Analyses (mg/L)


(field) PH

l lab)

Water Temperature

f°C) (field)


(field) 1,1-DCE 1,1-DCA U - D C E U - D C A 1,1,1-TCA T C E P C E Total VobtJe


/ EPA M C L N E NE 7 NE 170 5 200 5 5 N E 0.005 0.05 0.3* 0.05 5.0 250

Alteraate Cleanup Levef On Property >5.0 >5.0 N E NE NE N E NE NE NE N E NE N E N E NE 10 NE NE 500

Alternate Cleinop Levef - O f f Properly >6.3 >6.3 N E NE N E NE NE N E NE N E NE N E N E NE 1 N E NE 400

Dive Chohon Domeltic 08/03 NA NA NA NA 1.0U I .OU I.OU I .OU 1.0 U 1.0U 1.0U ND N A N A NA N A N A NA N A

8/04 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

07/31/05 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

1 l/OS/05 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

11/08/06 NA • NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U . 02 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

02/21/07 NA NA N A NA 0.2 U 0.2 U 0.2 U 0 2 UJ 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

04/30/07 NA NA N A NA 0.2 U • 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A


10/31/07 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A

02/05/08 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A N A NA N A

05/13/08 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A


11/16/08 NA NA N A NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A



08/11/09 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

10/27/09 • NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

02/03/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A

05/19/10 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A

08/16/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A

11/02/10 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

02/14/11 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

05/31/11 NA NA NA NA 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A


10/25/11 NA . N A , NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A . N A NA N A N A NA N A

02/01/12 N A NA N A NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A

Lester Kopecky Domestic 08/03 NA NA N A N A . I .OU I .OU 1.0U I .OU 1.0 U I .OU 1.0 U ND N A N A NA N A NA NA N A

8/04 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

08/02/05 N A NA N A NA 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A N A NA N A


08/20/06 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A N A N A

04/30/07 NA NA N A NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A


10/31/07 NA NA N A NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U • 0.2 U 0.2 U ND N A N A NA N A N A NA N A

02/05/08 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

05/13/08 NA N A NA NA 0.2 U 0.2 U 0 2 U 0.2 U 02 U 0.2 U 0.2 U ND N A NA NA N A NA NA . N A

08/03/08 NA NA NA NA 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

11/16/08 NA NA N A NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA N A

02/23/09 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A N A N A


08/11/09 N A • N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

10/27/09 N A NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

02/03/10 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA , NA N A N A NA N A

05/19/10 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA NA

OS/16/10 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA N A

11/02/10 NA N A N A NA 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U 0.2 U ND N A N A N A * N A N A NA N A

02/14/11 N A . NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

05/31/11 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A NA N A NA NA N A

• 07/28/11 NA NA NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A N A NA N A

10/25/11 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 02 U ND N A N A NA N A N A N A N A

02/01/12 NA NA N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U ND N A NA NA N A N A NA N A

KW5>Ll>iTrSAY\2t)l?\9 DeUvmbl<*->\9.l Finil Rrptrru\Apnl Bujimj3l\T*ibk»\T»blc 5-Pmite Wtlii (Pm»ie »-elU) imnov.

file 9 or to URS Corporation

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Table 5 Summary of Analy tical Remits for Domestic, Irrigation, and Stock Wells Lindsay Manufacturing, LLC Lindsay, Nebraska

Specific Organic Analyses ((pg/L) Inorganic Analyses (mg/L)


(field) PH

( lab)

Water Temperature

(°C) (Held)

Conductivity (pmho/cm)

(field) 1,1-DCE 1,1-DCA l , 2 .DCE 1,2-DCA 1,1,1-TCA T C E P C E Total Volatile


E P A M C L N E NE 7 NE 170 5 200 5 5 NE 0.005 0.05 0.3 0.05 5.0 250

Alternate Cleanup Level* On Property >5.0 > 5.0 NE N E NE NE NE NE NE NE NE NE NE NE 10 NE NE 500

Alternate Cleanup Levef Off Property >6.3 >6.3 NE NE NE NE NE NE NE NE NE NE NE NE 1 NE NE 400

Tom Mefstrik Domestic 8/03 NA N A N A NA 1.0 U I.OU I.OU I.OU 1.0 U 1.0U 1.0U ND N A N A N A N A N A NA N A

08/02/05 . NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A N A NA NA

11/08/05 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U N D N A NA NA NA N A NA NA

01/31/06 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U ND N A NA N A N A NA NA NA

05/09/06 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA NA

08/20/06 . NA N A N A NA . 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA N A NA N A NA NA NA

11/07/06 NA N A NA NA 0.2 U 0.2 U 02 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A N A NA NA

02/21/07 , NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 UI 0.2 U 0.2 U 0.2 U ND N A N A N A N A . N A N A N A

04/30/07 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA NA

08/13/07 NA N A N A NA 0.2 U 0.2 U 0.2 U ,. 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A NA NA NA

10/31/07 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A N A NA NA

02/05/08 NA N A . N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND N A NA NA N A NA NA NA

05/13/08 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A NA NA NA NA

08/03/08 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U . 0.2 U 0.2 U ND NA NA NA N A NA NA NA

11/16/08 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA N A NA NA

02/24/09 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA N A N A NA NA

05/12/09 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA NA NA NA NA N A

0B/11/09 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A N A N A NA NA

10/2 S/09 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A N A N A • NA N A

02/03/10 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA NA NA NA NA NA

05/19/10 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2'U 0.2 U ND N A NA N A NA N A NA N A

08/16/10 NA N A N A N A 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A NA NA NA NA

11/02/10 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U N D NA NA N A N A NA NA NA

02/14/11 NA N A N A N A 0.2 IJ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A NA N A N A NA NA NA

05/31/11 NA N A NA NA 0.2 U 0.2 U .0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND N A N A N A NA NA NA NA

07/28/11 NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0 2 U 0.2 U 0.2 U ND N A N A N A NA NA NA NA

10/25/11 NA N A N A N A 0.2 U 0.2 U 0.2 U 0 2 U 0 2 U 0.2 U 0 2 U ND N A NA N A N A NA NA NA

02/01/12 • NA N A N A NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND NA NA N A N A N A NA NA

Artesian Klassen Well East 01/31/05 NA N A NA NA N A NA NA NA N A NA NA N A 5.0 U NA N A NA NA NA NA

Artesian Klassen Well West 01/31/05 NA N A NA NA 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U ND 5.0 U NA NA N A NA NA NA

Old City Wel l 08/08/05 NA NA N A NA 0.2 U 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.3 N A NA N A N A N A NA NA

•Reference letier from State of Nebraska to Lindsay Manufacturing, LLC dated I 2/I4/0O applicable to sulfate, pH. and iron.

"The EPA MCL for 1,2-DCE is the sum of the individual EPA MCLs for the cis-1,2-DCE (70 (ug/L) and trans-1,2-DCE [ 100 {ug/L) isomers. CEPA secondary MCLs

Notes: Bold font indicates result reported is above or equal to the MCL or the alternate cleanup level. 1,1-DCE l.l-dichloroelhene 1.1- DCA- 1,1-dichloroethane 1.2- DCE - total of cis-1,2-dichloroeihene and trans-1,2-dkhIoroethcne 1,2-DCA 1,2-dichloroethane 1,1,1-TCA 1 J.l-trichloroethane TCE trichloroethene PCE tei/achtoroethene Total Volatile Organics sum of detected results for 1,1-DCE. 1,1-DCA. 1,2-DCE, 1,2-DCA, 1,1,1-TCA, TCE, and PCE C degree Celsius

DUP • duplicate

J Indicates that value is an estimate, either because quality control criteria were not met, or because ihe value was below the quantitation limil. i+ estimated value, biased high MCL maximum contaminant level ufi-T, micorgram per liter umho/cm micromho per centimeter mg/L milligram per liter NA not analyzed or not available ND not detected NE not established

U • Indicates that the compound was analyzed for, but not detected. UJ The analyte was not detected above the reported sample quantitation limit; however, the reported quantitation limit is an approximate value.

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FOURTH FIVE-YEAR REVIEW REPORT FOR … five-year review report for lindsay manufacturing compan...

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