Ethan Allen Mobil - Vermont...Ethan Allen Mobil SUPPLEMENTAL SITE INVESTIGATION REPORT 996 North...

Ethan Allen Mobil SUPPLEMENTAL SITE INVESTIGATION

REPORT

996 North Avenue BURLINGTON, VERMONT

Vermont DEC Site # #2000-2740

KAS # 402060232

July 2012

Prepared for:

S.B. Collins, Inc. Box 671

St. Albans, VT 05478

Prepared by:

368 Avenue D, Suite #15 P.O. Box 787, Williston, Vermont 05495

(802) 383-0486 (ph), (802) 383-0490 (fax) www.kas-consulting.com

Supplemental Site Investigation Report Ethan Allen Mobil, Burlington, Vermont

July 2012 VTDEC Site #2000-2740

TABLE OF CONTENTS

1.0 INTRODUCTION .............................................................................................................................................. 2

2.0 SITE BACKGROUND ...................................................................................................................................... 2

3.0 SUBSURFACE EXPLORATION .................................................................................................................... 3

3.1 PRE-DRILLING ACTIVITIES ............................................................................................................................... 3 3.2 MONITORING WELL INSTALLATION AND FIELD SCREENING OF SUBSURFACE SOILS ........................................ 3

4.0 MULTI-PHASE EXTRACTION EVENT ....................................................................................................... 4

5.0 GROUNDWATER MONITORING ................................................................................................................ 4

5.1 DETERMINATION OF GROUNDWATER FLOW DIRECTION AND GRADIENT ......................................................... 4 5.2 GROUNDWATER SAMPLING .............................................................................................................................. 5 5.3 ANALYTICAL RESULTS ..................................................................................................................................... 5 5.4 QUALITY ASSURANCE AND CONTROL SAMPLING AND ANALYSIS .................................................................... 6 5.5 TREND ANALYSIS ............................................................................................................................................. 6

6.0 SENSITIVE RECEPTORS ............................................................................................................................... 7

7.0 CONCLUSIONS ................................................................................................................................................ 7

8.0 RECOMMENDATIONS ................................................................................................................................... 8

APPENDICES Appendix A. Maps Appendix B. Soil Boring Diagrams Appendix C. Multi-Phase Extraction (MPE) Data Appendix D. Liquid Level Monitoring Data Appendix E. Groundwater Quality Summary Data Appendix F. Groundwater Analytical Laboratory Report



1.0 INTRODUCTION This report provides a summary of the activities as part of the Supplemental Subsurface Investigation (SSI) at the Ethan Allen Mobil property located at the corner of North Avenue and Ethan Allen Parkway in Burlington, Vermont (see Site Location Map and Site Map, Appendix A). The site is an operating filling station and repair garage. A Supplemental Site Investigation was requested by Mr. Gerold Noyes of the Vermont Department of Environmental Conservation in response to the groundwater monitoring conducted on site in November, 2011. This work was performed to further assess the degree of free product migration on site and the extent of petroleum impact to soil and groundwater off site. Work was completed in accordance with the KAS, Inc. (KAS) Work Plan and Cost Estimate for Monitoring and Recovery Well Installation and Sampling dated February 21, 2012, approved by Mr. Gerold Noyes of the VTDEC in a letter dated March 8, 2012 and with the previous July, 2010 Work Plan and Cost Estimate for Multi Phase Extraction (MPE) events, approved by Mr. Noyes in a letter dated July 22, 2010.

2.0 SITE BACKGROUND Elevated levels of subsurface petroleum contamination were detected on June 1997 at the site during the permanent closure and replacement of the piping components associated with three gasoline underground storage tanks (USTs) at the site. Groundwater monitoring was initiated at this site in April 2000 to address the detection of petroleum contamination in the subsurface at the site associated with the gasoline USTs. Five existing monitoring wells were sampled. Low part-per-billion (ppb) petroleum impact was reported in two wells. Annual groundwater monitoring was performed from April 2000 through June 2004 and biennial monitoring was conducted in 2006. As part of the process of site closure pursuant to a Sites Management Activity Completed (SMAC) designation, KAS mobilized to the site on October 24, 2008, to abandon the five on-site monitoring wells. During the visit to the site, light non-aqueous phase liquid (LNAPL) was measured in MW-5 (now RW09-01). The gasoline in the 6,000 gallon super tank was removed on October 27, 2009, and a pressure decay test was conducted on the tank on November 2, 2008. The UST failed the pressure test. Based on an evaluation of inventory records, it is possible but by no means certain, that up to 300 gallons of gasoline were released from the super unleaded UST. On March 31 and April 1, 2009, a KAS geologist coordinated and directed an MPE pilot test on monitoring well MW-5. A Multi-Phase Extraction and Feasibility Analysis Report was completed in May 2009 and included an MPE pilot test and determination of hydraulic conductivity via well recovery analysis. The results of the report indicated that MPE would be the most feasible remedial method among the viable alternatives evaluated. The CAP was prepared for the site in June 2009 based on the results of the Multi-Phase Extraction and Feasibility Analysis Report. Copies of the summary reports of prior work are on file at the offices of the DEC in Waterbury, Vermont. Based on the results of the MPE pilot test, KAS recommended a high frequency series of MPE events be conducted on site in order to speed up the remediation process on site. From March 31, 2009 to October 6, 2011, KAS had conducted a total of 28 MPE events at this site and had extracted a total of 1,628 gallons from the subsurface.



During the November 4, 2011 groundwater monitoring event on site, LNAPL was measured in MW09-06, which is located down-gradient of RW09-01. This free product migration prompted the recommendation of the Supplemental Site Investigation.

3.0 SUBSURFACE EXPLORATION

3.1 Pre-Drilling Activities Prior to the initiation of subsurface activities at the Site, the Site’s Health and Safety Plan (HASP) was updated in accordance with Vermont Occupational Safety and Health Administration (OSHA) requirements. In addition, per the City of Burlington’s requirements, a Department of Public Works Excavation Permit for the installation of new monitoring wells was obtained on May 10, 2012. The Site was pre-marked for DigSafe by KAS personnel on May 10, 2012. DigSafe was contacted prior to drilling activities and DigSafe number 20121909463 was assigned. The City of Burlington officials were also contacted for clearance of drilling locations related to underground utilities in the area. All nearby underground utilities are shown on the Site Map in Appendix A.

3.2 Monitoring Well Installation and Field Screening of Subsurface Soils Four soil borings, completed as monitoring wells RW12-02 (4”), MW12-09 (1”), MW12-10 (1”) and MW12-11 (1”), were advanced at the site on May 18, 2012 by T&K Drilling of Swanzey, New Hampshire under the direct supervision of a KAS engineer. RW12-02 was installed using a drill rig equipped with an 8.25-inch ID hollow stem auger and MW12-09 through MW12-11 were installed used a geoprobe 2-inch direct push rig. The monitoring wells were installed as close as possible to the pre-marked locations avoiding overhead lines, subsurface utility lines, and DigSafe marks. The monitoring well locations are indicated on the Site Map (Appendix A). Soil samples were collected every 5-feet from the hollow stem rig and every 3-feet from the geoprobe rig and were logged by the supervising engineer, and screened for the presence of volatile organic compounds (VOCs) using an Ion Science PhoCheck model. Prior to screening, the PID was calibrated with isobutylene referenced to benzene. Soils were screened using the KAS Jar/Polyethylene Bag Headspace Screening Protocol. Soil characteristics and contaminant concentrations were recorded by the KAS engineer in detailed monitoring well construction diagrams, presented in Appendix B. MW12-09 through MW12-11 were constructed of 1-in. PVC plastic with 0.010-in. factory slotted screen. RW12-02 was constructed out of 4-in PVC with wire wound screen. The screen was placed to span the water table. A coarse sand pack was placed around the screen of each well, and a bentonite seal was placed above the sand pack. Each monitoring well was surveyed-in relative to existing monitoring wells at the conclusion of drilling activities on May 18, 2012. Subsurface Sediments Subsurface sediments encountered during the installation of RW12-02 and MW12-09 through MW12-11 consisted mostly of well graded sand. Groundwater was observed in the vicinity of 11 feet below grade in all soil borings on the day of drilling and bedrock was not encountered in any of the wells during drilling. A slight to strong petroleum odor was noted in soil samples collected from the soil boring for RW12-02 on May 18, 2012.



Elevated PID readings (>100 ppm) were observed in the soil samples collected during the installation of RW12-02 ranging from 0.8 ppm in the 0’-2’ sample to 275 ppm in the 10’-12’ sample. Drill cuttings from RW12-02 were transported into a properly labeled 55-gallon drum and temporarily left on site. The drum was later coordinated for transportation offsite by the owner, S.B. Collins, Inc.

4.0 Multi-Phase Extraction Event On May 23 and June 18, 2012, a KAS technician directed an MPE event on recovery wells RW09-01 and RW12-02. Approximately 5 gallons of petroleum vapor and liquid were recovered from recovery wells RW09-01 and RW12-02 during this combined 8-hour event. (Mechanical issues on May 23, 2012 required the event to be stopped after approximately 3-hours. The final 5-hours of the MPE event were conducted on June 18, 2012.) No LNAPL was recorded in either of the recovery wells before or after each day of the MPE event. Petroleum-impacted groundwater was extracted by Groundwater Environmental Service, Inc. (GEE) out of Windsor, CT and subsequently disposed by Environmental Products and Services (EP&S) of Burlington, VT, a licensed transport/disposal contractor. Included in Appendix C are tabular and graphical presentations of the total gallons recovered and the dollars spent per gallon versus time, fluid recovery and groundwater elevations versus time, and the vapor recovery data and calculations for the event. To date approximately, 1,633 gallons of liquid and vapor phase petroleum product and 8,869 gallons of petroleum-impacted groundwater have been recovered from this site via the MPE technology. During the most recent MPE event 5 gallons of liquid and vapor phase petroleum were recovered as compared to the MPE event conducted in January, 2011 where 53 gallons of liquid and vapor phase petroleum were recovered from RW09-01 alone. Overall, gasoline fluid recovery is decreasing significantly in RW09-01 and the addition of RW12-02 does not appear to have increased recovery. It appears that the MPE technology is having substantial impact to the petroleum impacted groundwater beneath the site as LNAPL has not been present in RW09-01 since December, 2009. Appendix C contains tabular and graphical presentations of the total gallons recovered and the dollars spent per gallon versus time; and fluid recovery and average recovery well groundwater elevations versus time.

5.0 Groundwater Monitoring

5.1 Determination of Groundwater Flow Direction and Gradient Prior to groundwater sampling on June 29, 2012, depth-to-water measurements were collected with the use of a Keck™ interface probe in all site monitoring and recovery wells. Results are tabulated as Liquid Level Monitoring Data in Appendix C. Historical water levels have also been tabulated and included in Appendix D. Depth-to-water measurements in the monitoring wells were subtracted from the top-of-casing elevations of each well to obtain groundwater elevations. The groundwater elevations are based on an arbitrary benchmark elevation of 100.00 feet for the top of the MW-1 casing. Depth to groundwater ranged from 9.06 feet below top of casing (btoc) in MW09-08 to 11.89 feet btoc in MW12-09. No LNAPL was measured or observed in any of the site-related wells on this date.



The groundwater elevation data collected on June 29, 2012, have been contoured and depicted on the Groundwater Contour Map for this date in Appendix A. According to this data, groundwater is estimated to be flowing to the west at an estimated hydraulic gradient of approximately 3.9%. These results are consistent with historical measurements.

5.2 Groundwater Sampling KAS collected groundwater samples from all site related monitoring wells and recovery wells on June 29, 2012. The monitoring well samples were collected according to the KAS monitoring well sampling protocol. The groundwater samples collected on this date were submitted to Endyne, Inc., Laboratory Services (Endyne) of Williston, Vermont for laboratory analysis for volatile organic compounds (VOCs) in the Vermont PCF compound list by EPA Method 8260B. In accordance with VTDEC protocols and for quality assurance/quality control (QA/QC) purposes, one duplicate sample and one trip blank were also collected and analyzed for VOCs in the Vermont PCF compound list by EPA Method 8012B. The groundwater samples were analyzed for the presence of benzene, toluene, ethylbenzene, and xylenes (BTEX), methyl tertiary butyl ether (MTBE), naphthalene, 1,3,5-trimethylbenzene (TMB), and 1,2,4-TMB.

5.3 Analytical Results Analytical results of the groundwater samples from the monitoring wells are tabulated in Appendix E. The contaminant concentrations reported for June 29, 2012 were plotted on the Site Map to generate the Contaminant Distribution Map presented in Appendix A. The historical groundwater quality data is summarized and graphed in Appendix C along with the applicable Vermont Groundwater Enforcement Standards (VGES) for the target petroleum compounds. The laboratory analysis report for the June 29, 2012, sampling data is included in Appendix F. • The total targeted VOC levels in the groundwater sample collected from MW-5/RW09-01

reported a concentration of 48,166 parts per billion (ppb) during this sampling event. MTBE was the only compound not detected above laboratory reporting limits. All other tested compounds, with exception to Xylenes were reported at concentrations greater than their applicable VGES;

• Benzene, Toluene, Ethylbenzene, Xylenes and 1,3,5/1,2,4 TMB were reported at concentrations greater than the applicable VGES in the sample collected from MW09-06. Additionally, the laboratory detection levels set for MTBE and Naphthalene for the sample collected from MW09-06 on June 29, 2012 (400 ppm for each) are significantly higher than their respective VGES;

• Benzene, Toluene, Ethylbenzene, 1,3,4/1,2,4 TMB and Naphthalene were reported at

concentrations greater than the applicable VGES in the samples collected from MW09-07 and RW12-02 and select other compounds were either detected below the applicable VGES or were not detected at detection limits higher than the VGES;

• Benzene and Naphthalene were reported at a concentration greater than the applicable

VGES in the sample collected from MW09-08. Select other compounds were detected below the applicable VGES;

• Benzene was reported at a concentration greater than the applicable VGES in the sample

collected from MW12-11 and Naphthalene was reported at a concentration less than its VGES;



• Various compounds were reported at concentrations below the applicable VGES in the samples collected from MW-1 and MW12-10;

• No compounds were reported above laboratory reporting limits in the groundwater samples

collected from monitoring wells MW-2, MW-3, MW-4 and MW12-09 during this sampling event;

5.4 Quality Assurance and Control Sampling and Analysis A trip blank and a duplicate sample were collected during the June, 2012 monitoring event. The results of the duplicate sample analysis were analyzed using a relative percent difference (RPD) method. The RPD is defined as 100 times the difference between the sample result and the duplicate result, divided by the mean of the sample and duplicate result. The RPD calculations are presented in the Groundwater Monitoring Results Summary in Appendix E. The RPD was unable to be calculated on this date as the duplicate sample taken from MW-3 did not contain VOC’s above laboratory reporting limits on this date. The effect of spurious influences on sample quality was insignificant, as none of the tested compounds were reported above detection limits in the trip blank collected on June 29, 2012.

5.5 Trend Analysis The constituent concentration trend charts for the wells sampled are included in Appendix E. The Total VOC concentration levels in MW-1 have increased to the highest level reported since August, 2009, but remain within historic range. Concentration levels in MW-1 continue to fluctuate since monitoring of this well began in April, 2000. The concentrations in MW-2, MW-3, and MW-4 have remained just above or below laboratory detection limits since these wells were placed back into the sampling schedule sampled in August, 2009. The VOC concentrations in RW09-01 have decreased since the last sampling event November 2011. LNAPL was measured in MW-5/RW09-01 August, 2009 and December, 2009. The VOC concentrations in MW09-06 were reported at the highest level since the well was installed in August, 2009, although it is likely that VOC concentrations have decreased in this well since the last sampling event in November, 2011 as LNAPL was measured in MW09-06 on that date. The VOC concentrations in MW09-07 have been consistently increasing each sampling event and have increased by over 500% since the last sampling event in November, 2011. The VOC concentrations in MW09-08 have increased since the last sampling event but are within historical range. The VOC concentrations in the recently installed recovery well, RW12-02, were reported at lower levels than the other recovery well on site, RW09-01. The other recently installed monitoring wells, MW12-09 through MW12-11 accurately define the extent of the VOC contamination in the groundwater down-gradient of the site except for MW12-11, which reported Benzene above the VGES. The highest contaminant concentration levels at this site are located down-gradient of the current USTs in the vicinity of RW09-01, MW09-07, MW09-06 and RW12-02. Based on historic soil screening data and the current groundwater sample analytical data, the plume is currently narrow. The elevated concentrations in MW09-07 and increasing trend indicates the plume is likely migrating off site. This was confirmed by the detection of petroleum contaminants in groundwater collected from newly installed wells MW12-10 and MW12-11. The full extent of the



dissolved phase plume is not defined at this time but it likely terminates shortly beyond MW12-11 due to the relatively low levels reported at this location.

6.0 Sensitive Receptors

The on-site building is used as a gasoline filling station and auto repair shop and is constructed on a concrete slab. The closest off site building (Bank) is located approximately 80 feet north of the source in a presumed cross-gradient direction. Due to its distance from the source and cross-gradient location this building is not believed to be at risk to vapor intrusion at this time. The nearest surface water is an unnamed pond located approximately 1,900 feet south of the Site. Due to its distance from the source the unnamed pond is not believed to be at risk to petroleum contamination at this time. Information available online via the VTDEC, Water Supply Division (viewed on line at http://maps.vermont.gov/?site=ANR_wswelldriller) indicates no private wells within ½ mile of the site. Public utilities in the area include natural gas, water, sanitary sewer, storm drains. In August 2009 KAS inspected a storm sewer drain across North Avenue (downgradient) from the site and screened the catch basin with a PID. No VOCs were measured to within six inches of the bottom of the catch basin on this date. Electric and telephone lines are located overhead. The only known sensitive receptors impacted to date are soil and groundwater.

7.0 Conclusions Based on the results of the Supplemental Site Investigation conducted in May and June of 2012, KAS presents the following conclusions: 1) Four soil borings, completed as monitoring wells RW12-02 (4”), MW12-09 (1”), MW12-10

(1”) and MW12-11 (1”), were advanced at the site on May 18, 2012. Subsurface sediments consisted mostly of well graded sand. Elevated PID readings were observed in the samples collected from the soil boring for RMW12-02 and the contaminated drill cuttings were transported into a 55-gallon drum, which was later coordinated for transportation offsite by the owner, S.B. Collins, Inc.

2) On May 23 and June 18, 2012, a KAS technician directed an MPE event on recovery wells

RW09-01 and RW12-02. Approximately 5 gallons of petroleum vapor and liquid were recovered during this combined 8-hour event. To date approximately, 1,633 gallons of liquid and vapor phase petroleum product and 8,869 gallons of petroleum-impacted groundwater have been recovered from this site via the MPE technology, however since January, 2011 gasoline fluid recovery has significantly decreased. The incorporation of RW12-02 into the latest MPE did not appear to increase the gasoline recovery.

3) Depth to groundwater ranged from 9.06 feet below top of casing (btoc) in MW09-08 to 11.89

feet btoc in MW12-09 during the groundwater monitoring event conducted on site on June 29, 2012. According to this data, groundwater is estimated to be flowing to the west at an estimated hydraulic gradient of approximately 3.9%, which is consistent with historic data;

4) Select dissolved petroleum-related VOCs were reported above the applicable VGES in the

samples collected from MW09-06, MW09-07, MW09-08, RW09-01, RW12-02 and MW12-11 on June 29, 2012. Various compounds were reported at concentrations below the applicable VGES in the samples collected from MW-1, and MW12-10 on June 29, 2012. No LNAPL was measured or observed in any of the site-related wells on this date. No petroleum-related



VOCs were reported at concentrations above laboratory detection limits in the samples collected from MW-2, MW-3, MW-4 or MW12-09 on this date;

5) The highest levels of VOC contamination on site are located down-gradient of the current

USTs, in the vicinity of RW09-01, MW09-07, MW09-06 and RW12-02 in the shape of a thin strip. Historic data suggests that the plume is migrating from east to west (see the Contaminant Distribution Map in Appendix A. VOC concentration levels in RW09-01, although high, are decreasing and concentration levels in MW09-06 and MW09-07 (located inside the “strip” and west of RW09-01) are increasing rapidly. MW09-08 and MW-1 appear to be located just south of “strip”, have been experiencing an increase in VOC concentration as of late but remain with historical range. MW-2, MW-3 and MW-4 are located outside of the contamination plume and have been below or slightly above the detection limits since these wells were first sampled in April 2000.

6) The full down-gradient extent of the dissolved phase plume has not been defined at this time

but likely terminates shortly beyond MW12-11 due to the relatively low levels reported at in the vicinity of MW12-10 and MW12-11.

7) The only known on-site sensitive receptors impacted to date are soil and groundwater.

8.0 Recommendations Based on the results of the supplemental site investigation conducted at the Ethan Allen Mobil property, KAS recommends the following:

1. Groundwater monitoring at the Site should continue on a semi-annual basis with the next monitoring event to be scheduled for November, 2012;

2. Due to consistent non detection of VOC concentrations above the laboratory detection

limits, MW-2, MW-3 and MW-4 should be removed from the sampling schedule at this time. These wells should, however, continue to be gauged on a semi-annual basis;

3. Due to the recent consistent decrease in liquid gasoline recovered in MPE events

conducted on site since January, 2011 and due to the lack of LNAPL present in any site related wells on June 29, 2012, KAS does not recommend conducing additional MPE events on site at this time; and,

4. To help prevent the continued migration of petroleum contamination offsite, KAS recommends that a study to determine preferred remedial alternatives for the site be conducted at this time.



Maps

NorthKAS Number: 402060232Source: USGS 7.5' Mapping Burlington, VT 1948, photorevised 1987

Ethan Allen MobilBurlington, VT

Site Location MapUSGS Mapping

Drawing No. 1 Date: 08/12/04Scale: 1:24,000 By: DAM

SITE



Soil Boring Diagrams

Well No: RW012-02ETHAN ALLEN MOBILBURLINGTON, VT

KAS Project #: 402060232 Date Installed: 05/18/12Drilled by : T&K Drilling Drilling Method: HSA

Driller: Sean McGarry and Kevin Singleton Boring Diameter.: 8.25"Supervised by: BG Development Method: Disposable Bailer

BORING LOG AND WELL CONSTRUCTION DIAGRAM

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Supe sed by G e e op e e od sposab e a eLogged by: BG Screened Length: 10 feet

Pen/Rec (") Interval (') Soil CharacteristicsGrade = 0 Blow Count PID (ppm) sand and gravel parking lot

0.5 N/A 0'-2' WELL GRADED SAND (SW) SW1.0 N/A 0.8 Dry, dark brown1.5 Ft<Grade sampled off auger flight (AF)2.0

2.5

Well Construction

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5.5 24/17 5'-7' WELL GRADED SAND (SW) SW6.0 3-4-6-6 2.1 dry, light brown

6.5

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9.0 6/26/129.5 9.34'

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11 0 5/18/12 24/16 10' 12' WELL GRADED SAND (SW) SW11.0 5/18/12 24/16 10'-12' WELL GRADED SAND (SW) SW11.5 11' 5-4-4-5 275 wet, olive gray12.0

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15.5 24/15 15'-17' WELL GRADED SAND (SW) SW16.0 8-11-13-18 2.5 wet, brown16.5

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18.0 18' End of Exploration18.5

Legendg

Road Box with Bolt Down Cover, Set in Cement. Locking Plug.Existing Surface. 4" ID, Schedule 40 PVC Riser.Bentonite Seal Placed in Annulus. 4" ID, Schedule 40 PVC, 0.010"-Slotted Well ScreenDrill Cuttings Placed in Annulus. 4" ID, Schedule 40 PVC, Bottom CapGrade #1 Silica Sand Pack Placed in Annulus.

LNAPL light non-aqueous phase liquid Static Water LevelNM - Not Measured N/A - Not Applicable Approximate Water Level During Drilling

Well No: MW12-09ETHAN ALLEN MOBILBURLINGTON, VT

KAS Project #: 402060232 Date Installed: 05/18/12Drilled by : T&K Drilling Drilling Method: Geoprobe

Driller: Sean McGarry and Kevin Singleton Boring Diameter.: 2"Supervised by: BG Development Method: Disposable Bailer


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Pen/Rec (") Interval (') Soil CharacteristicsGrade = 0 Blow Count PID (ppm) Asphalt

0.5 N/A 0'-3' WELL GRADED SAND WITH GRAVEL (SW) SW1.0 36/21 0.2 dry, dark brown1.5 Ft<Grade

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Well Construction

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3.5 N/A 3'-6' WELL GRADED SAND (SW) SW4.0 36/30 0.4 dry, dark brown4.5

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6.5 N/A 6'-9' WELL GRADED SAND (SW) SW7.0 36/34 0.3 dry to moist, medium brown7.5

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9.5 N/A 9'-12' WELL GRADED SAND (SW) SW10.0 36/30 1.0 moist to wet, medium brown10.5

11 0 5/18/1211.0 5/18/1211.5 11'12.0 6/29/12

12.5 11.89' N/A 12'-15' WELL GRADED SAND (SW) SW13.0 36/36 1.0 wet, medium brown, olive grey13.5

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18.0Legend

Road Box with Bolt Down Cover, Set in Cement. Locking Plug.Existing Surface. 1" ID, Schedule 40 PVC Riser.Bentonite Seal Placed in Annulus. 1" ID, Schedule 40 PVC, 0.010"-Slotted Well ScreenDrill Cuttings Placed in Annulus. Plug PointGrade #1 Silica Sand Pack Placed in Annulus.






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0.5 N/A 0'-3' WELL GRADED SAND (SW) SW1.0 36/24 0.5 dry, medium to dark brown, mixed with topsoil1.5 Ft<Grade

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Well Construction

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3.5 N/A 3'-6' WELL GRADED SAND (SW) SW4.0 36/21 0.3 dry, medium brown with some orange4.5

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6.5 N/A 6'-9' WELL GRADED SAND (SW) SW7.0 36/32 0.4 dry to moist, light to medium brown7.5

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9.5 N/A 9'-12' SILTY SAND (SM) SM10.0 5/18/12 36/34 1.0 moist to wet, medium brown to olive grey10.5 10.5' H2O @ 10.5' approx11 0 6/29/1211.0 6/29/1211.5 10.9'12.0

12.5 N/A 12'-15' WELL GRADED SAND WITH SILT (SW-SM)SW-SM

13.0 36/34 1.0 wet, medium brown, olive grey13.5 set well at 15'14.0

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18.0Legend

Road Box with Bolt Down Cover Set in Cement Locking PlugRoad Box with Bolt Down Cover, Set in Cement. Locking Plug.Existing Surface. 1" ID, Schedule 40 PVC Riser.Bentonite Seal Placed in Annulus. 1" ID, Schedule 40 PVC, 0.010"-Slotted Well ScreenDrill Cuttings Placed in Annulus. Plug PointGrade #1 Silica Sand Pack Placed in Annulus.






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0.5 N/A 0'-3' WELL GRADED SAND WITH GRAVEL (SW) SW1.0 36/22 0.3 dry, medium to dark brown mixed with topsoil1.5 Ft<Grade

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3.5 N/A 3'-6' WELL GRADED SAND (SW) SW4.0 36/29 0.6 dry, light to dark brown4.5

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6.5 N/A 6'-9' WELL GRADED SAND (SW) SW7.0 36/31 1.0 dry to moist, light to medium brown7.5

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9.5 N/A 9'-12' WELL GRADED SAND WITH SILT (SW-SM)SW-SM

10.0 36/36 0.8 moist to wet, medium brown, grey, red (mottles present)10.5 5/18/12 H2O @ approx 11'11.0 11'11.5 6/29/1212.0 11.46'

12.5 N/A 12'-15' SANDY SILT (ML) ML13.0 36/36 1.2 wet, medium brown, grey13.5 Set well at 15'14.0

14 514.5

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16.5

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18.0LegendLegend

Road Box with Bolt Down Cover, Set in Cement. Locking Plug.Existing Surface. 1" ID, Schedule 40 PVC Riser.Bentonite Seal Placed in Annulus. 1" ID, Schedule 40 PVC, 0.010"-Slotted Well ScreenDrill Cuttings Placed in Annulus. Plug PointGrade #1 Silica Sand Pack Placed in Annulus.




Multi-Phase Extraction (MPE) Data


Multi-phase Extraction Event Data Summary

Total Volume of Gasoline Recovered Cumulative Cumulative

Date per event (gal) Approx. $/Gallon Gallons Recovered Approx. $/Gallon

3/31/2009 96.1 67.91$ 96.1 67.91$ 8/26/2009 66.4 86.48$ 162.5 75.50$

10/26/2009 59.8 90.66$ 222.3 79.57$ 1/25/2010 78.9 67.34$ 301.3 76.37$ 3/30/2010 56.4 96.82$ 357.7 79.59$ 4/26/2010 88.5 61.13$ 446.2 75.93$ 6/7/2010 118.5 45.92$ 564.7 69.64$

6/30/2010 105.2 51.09$ 669.9 66.72$ 7/27/2010 102.3 39.38$ 772.27/28/2010 113.8 886.0 60.05$ 8/16/2010 110.1 62.62$ 996.18/25/2010 65.4 1061.5 60.48$ 9/28/2010 68.5 69.33$ 1130.09/29/2010 58.1 1188.1 61.42$

10/19/2010 65.1 66.78$ 1253.210/20/2010 66.2 1319.4 61.95$ 11/9/2010 56.7 75.58$ 1376.1

11/10/2010 60.4 1436.5 63.06$ 12/20/2010 60.6 85.69$ 1497.112/21/2010 42.5 1539.6 64.58$ 1/11/2011 53 109.68$ 1592.3 65.84$ 3/21/2011 7 1599.33/22/2011 6 1,215.22$ 1605.3 69.84$ 4/20/2011 3 1608.34/21/2011 3 2,381.95$ 1611.3 74.01$

VTDEC Site No. 2000-2740

,$ $5/24/2011 2 2,265.99$ 1613.3 76.73$ 7/25/2011 9 504.24$ 1622.3 79.10$ 10/6/2011 6 757.44$ 1628.3 81.59$ 5/23/2012 2.0 1630.36/18/2012 3.0 1633.31,208.73$ 85.04$



$0.00

$500.00

$1,000.00

$1,500.00

$2,000.00

$2,500.00

0.0

20.0

40.0

60.0

80.0

100.0

120.0

Cos

t per

Gal

lon

Gal

lons

Date

Gallons Recovered and Cost per Gallon per Event Vs. Time

Gallons Recovered per Event

Approximate Cost/Gallon

Cumulative LNAPL Recovered and Cumulative Cost per Gallon Recovered


$0.00

$10.00

$20.00

$30.00

$40.00

$50.00

$60.00

$70.00

$80.00

$90.00

0.0

200.0

400.0

600.0

800.0

1000.0

1200.0

1400.0

1600.0

1800.0

$/ G

allo

n R

ecov

ered

Gal

lons

Rec

over

ed

Date

Cumulative LNAPL Recovered and Cumulative Cost per Gallon Recovered

Gallons Recovered

Approx. $/Gallon



Fluid Recovery EstimatesVapor Phase Liquid Phase Total Average

Gasoline Gasoline Gasoline Total Fluids Recovery WellRecovery Recovery Recovery Recovered Groundwater

Date (fluid gallons) (fluid gallons) (fluid gallons) (gallons) Elevation (ft)3/31/2009 84.14 12 96.1 380 91.408/26/2009 31.39 35 66.4 295 91.33

10/26/2009 38.81 21 59.8 259 90.781/25/2010 54.93 24 78.9 219 90.753/30/2010 45.44 11 56.4 256 91.564/26/2010 72.52 16 88.5 315 91.806/7/2010 112.45 6 118 356 91.58

6/30/2010 105.18 0 105 295 90.597/27/2010 90.33 12 102 268 90.127/28/2010 103.83 10 114 255 90.798/16/2010 96.10 14 110 256 89.918/25/2010 65.41 0 65 263 90.279/28/2010 68.51 0 69 287 89.569/29/2010 57.07 1 58 310 90.26

10/19/2010 55.09 10 65 368 91.1710/20/2010 59.22 7 66 359 90.8811/9/2010 51.68 5 57 377 91.00

11/10/2010 53.40 7 60 326 91.0312/20/2010 55.60 5 61 305 90.6912/21/2010 38.45 4 42 324 90.951/11/2011 49.73 3 53 298 90.653/21/2011 2.58 4 7 242 91.213/22/2011 3.33 2.5 6 245 91.594/20/2011 2.05 1 3 287 92.654/21/2011 2.54 0.25 3 303 92.505/24/2011 1.77 0.5 2 510 94.107/26/2011 7.72 1 9 392 92.3810/6/2011 5.81 0 6 347 92.08

5/23/2012 1.92 0 2 80 90.91 6/18/2012 3.18 0 3 92 90.02

NM = Not Measured* 5/23/12 event ran for three hours** 6/18/12 event ran for five hours

0.00

20.00

40.00

60.00

80.00

100.00

120.00

Volu

me

(Gal

lon

Equi

vale

nt)

Date

MPE Event Gasoline Vapor and Fluid Recovery

Vapor Phase Gasoline

Liquid Phase Gasoline


KAS Burlington996 North Avenue

Burlington, VTMay 23, 2012

Clock Time Time (min)Down Time (min)

Extraction Well IDsSystem Influent Concentration

(ppm)

System Influent End

Concentration (ppm)

System Influent Average

Concentrations (ppm)

Initial Air Flow (scfm)

End Air Flow (scfm)

Mean Air Flow (scfm)

Influent BTUs/hr

System Well Vacuum at engine

(in H2O)

Mass Removal Rate (lbs/hr)

based upon Inf Conc

Mass Removal (lbs)

Cumulative Removal (lbs)

based upon FID

measurements

Mass Removal Rate (lbs/hr) based upon

BTU/hr

Mass Removal

(lbs)

Cumulative Removal

based upon BTU rate

1851 - start 5 0 RW-09-01, RW-12-01 2000 2100 2050 30 38 34 2000 30 0.09 0.01 0.01 0.11 0.01 0.011851 to 1924 33 0 RW-09-01, RW-12-01 2100 6600 4350 38 64 51 42600 54 1.80 0.99 0.99 2.37 1.30 1.301924 to 2001 37 0 RW-09-01, RW-12-01 6600 5000 5800 64 56 60 141400 56 3.16 1.95 2.94 7.86 4.84 6.152001 to 2030 29 0 RW-09-01, RW-12-01 5000 8232 6616 56 51 53.5 129700 69 2.52 1.22 4.15 7.21 3.48 9.632030 to 2101 31 0 RW-09-01, RW-12-01 8232 22000 15116 51 38 44.5 36000 24 5.12 2.64 6.80 2.00 1.03 10.662101 to 2109 8 0 RW-09-01, RW-12-01 22222 8222 15222 38 30 34 160300 74 1.02 0.14 6.93 8.91 1.19 11.852109 - finish 0 0 RW-09-01, RW-12-01 8222 5800 7011 0 0 0 0 0 0.00 0.00 6.93 0.00 0.00 11.85

00000000

TOTAL 138 6.93 11.85

NOTES:1 Empty knock out tank of liquid to vac truck2 Swap propane tanks at 1901

3 18000 btu/lb for gasoline

5 pounds removed per time period based upon BTU/hr measurements = BTUs/hr x (1/18000 BTU/lb of gasoline) 6 2 bottles of propane used7 Stinger set at approximately 2 feet in water table8 Total volume of water extracted 80 gallons9 ppm: parts per million, readings collected using internal Flame Ionization Detector in Internal Combustion Engine

10 min: minutes11 scfm: standard cubic feet per minute, as calculated within the Internal Combustion Engine logic controller12 BTUs/hr: British Thermal Units per hour, as calculated within the Internal Combustion Engine logic controller13 lbs/hr: pounds per hour14 in H2O: inches of water15 lbs: pounds

pounds removed per time period based upon FID measurements = (Hrs) x Average Flow (cfm) x ((Average VOC (ppm)) x (95 g / mol) x (1.55 x 10^-7 (lb-mol-min/ppm-hr-ft3-g))

4

Groundwater Environmental Services, Inc.,Windsor, CT

KAS Burlington996 North Avenue

Burlington, VTJune 18, 2012

Clock Time Time (min)Down Time (min)

Extraction Well IDsSystem Influent Concentration

(ppm)

System Influent End

Concentration (ppm)

System Influent Average

Concentrations (ppm)

Initial Air Flow (scfm)

End Air Flow (scfm)

Mean Air Flow (scfm)

Influent BTUs/hr

System Well Vacuum at engine

(in H2O)

Mass Removal Rate (lbs/hr)

based upon Inf Conc

Mass Removal (lbs)

Cumulative Removal (lbs)

based upon FID

measurements

Mass Removal Rate (lbs/hr) based upon

BTU/hr

Mass Removal

(lbs)

Cumulative Removal

based upon BTU rate

1900 - start 0 0 RW-09-01, RW-12-01 2000 2000 2000 20 20 20 2000 54 0.00 0.00 0.00 0.11 0.00 0.001900 to 1903 3 0 RW-09-01, RW-12-01 2000 3100 2550 20 26 23 2000 54 0.04 0.00 0.00 0.11 0.01 0.011903 to 1931 28 0 RW-09-01, RW-12-01 3100 4400 3750 26 43 34.5 13900 73 0.89 0.41 0.42 0.77 0.36 0.371931 to 1959 28 0 RW-09-01, RW-12-01 4400 3600 4000 43 54 48.5 83900 65 1.33 0.62 1.04 4.66 2.18 2.541959 to 2029 30 0 RW-09-01, RW-12-01 3600 3600 3600 54 36 45 110800 82 1.19 0.60 1.64 6.16 3.08 5.622029 to 2101 30 0 RW-09-01, RW-12-01 3600 3600 3600 36 36 36 111900 83 0.95 0.48 2.11 6.22 3.11 8.732101 to 2133 32 0 RW-09-01, RW-12-01 2100 2100 2100 36 36 36 111900 79 0.59 0.32 2.43 6.22 3.32 12.042133 to 2201 28 0 RW-09-01, RW-12-01 2100 2200 2150 17 17 17 61700 92 0.25 0.12 2.55 3.43 1.60 13.642201 to 2231 30 0 RW-09-01, RW-12-01 2200 2600 2400 17 8 12.5 77000 84 0.22 0.11 2.66 4.28 2.14 15.782231 to 2256 25 0 RW-09-01, RW-12-01 2600 2600 2600 8 9 8.5 83900 82 0.14 0.06 2.71 4.66 1.94 17.722256 to 2300 26 0 RW-09-01, RW-12-01 2600 2600 2600 9 9 9 79100 82 0.15 0.06 2.78 4.39 1.90 19.632300 - finish 0 0 RW-09-01, RW-12-01 2600 2600 2600 10 10 10 79100 80 0.00 0.00 2.78 4.39 0.00 19.63

TOTAL 260 2.78 19.63

NOTES:1 Empty knock out tank of liquid to vac truck2 Swap propane tanks at 11954, 2100, 2205

3 18000 btu/lb for gasoline

5 pounds removed per time period based upon BTU/hr measurements = BTUs/hr x (1/18000 BTU/lb of gasoline) 6 4 bottles of propane used7 Stinger set at approximately 2 feet in water table8 Total volume of water extracted 92 gallons9 ppm: parts per million, readings collected using internal Flame Ionization Detector in Internal Combustion Engine

10 min: minutes11 scfm: standard cubic feet per minute, as calculated within the Internal Combustion Engine logic controller12 BTUs/hr: British Thermal Units per hour, as calculated within the Internal Combustion Engine logic controller13 lbs/hr: pounds per hour14 in H2O: inches of water15 lbs: pounds

pounds removed per time period based upon FID measurements = (Hrs) x Average Flow (cfm) x ((Average VOC (ppm)) x (95 g / mol) x (1.55 x 10^-7 (lb-mol-min/ppm-hr-ft3-g))

4

Groundwater Environmental Services, Inc.,Windsor, CT



Liquid Level Monitoring Data

Liquid Level Monitoring Data Ethan Allen MobilBurlington, Vermont

Monitoring Date: June 29, 2012Top Specific Corrected Corrected

Well I.D. of Casing Depth To Depth To Product Gravity Hydro Depth Water TableElevation Product Water Thickness Of Product Equivalent To Water Elevation

MW-1 100.00 - 9.37 - - - - 90.63MW-2 101.10 - 9.64 - - - - 91.46MW-3 101.86 - 9.65 - - - - 92.21MW-4 101.46 - 9.45 - - - - 92.01

RW09-01 100.51 - 9.47 - - - - 91.04MW09-06 100.48 - 9.71 - - - - 90.77MW09-07 98.77 - 9.15 - - - - 89.62MW09-08 98.95 - 9.06 - - - - 89.89RW12-02 99.46 - 9.34 - 90.12MW12-09 98.42 - 11.89 - 86.53MW12-10 97.60 - 10.90 - 86.70MW12-11 96.34 - 11.46 - 84.88

All Values Presented in Units of FeetTOC data from Surveys on 4/12/00, 8/18/09, 5/18/12Arbitrary Datum - TOC MW-1

VTDEC Site # 2000-2740

Ethan Allen MobilBurlington, Vermont

Historical Summary of Liquid Level Data

Measurement Date:Well I.D. 04/12/00 05/07/01 05/16/02 05/19/03 06/04/04 05/15/06 03/31/09 08/24/09 12/14/09 11/04/11

MW-1 90.76 91.19 90.00 90.60 90.94 90.96 90.87 91.22 90.47 91.07MW-2 91.47 92.22 95.15 91.36 91.67 91.92 91.57 91.95 91.35 92.17MW-3 92.10 93.34 91.71 92.07 92.46 92.84 92.32 93.16 92.07 93.14MW-4 91.97 93.15 91.53 91.91 92.33 93.62 93.07 92.44 91.94 92.94MW-5/RW09-01 91.03 91.77 90.70 90.95 91.27 91.42 91.40 91.36 91.09 91.62MW09-06 91.11 90.59 91.32MW09-07 89.79 89.55 89.90MW09-08 89.49 89.49 90.19

Well I.D. 06/29/12MW-1 90.63MW-2 91.46MW-3 92.21MW-4 92.01RW09-01 91.04MW09-06 90.77MW09-07 89.62MW09-08 89.89RW12-02 90.12MW12-09 86.53MW12-10 86.70MW12-11 84.88

All Values Reported in Feet

#NA - not measured Site surveyed April 12, 2000, August 18, 2009, and May 18, 2012

Elevations determined relative to MW-1, which was arbitrarely set at 100.00 feet

VTDEC Site #2000-2740



Groundwater Quality Summary Data

Groundwater Quality Summary Data Ethan Allen MobilBurlington, Vermont

Monitoring well MW-1

PARAMETER 04/12/00 05/07/01 05/16/02 05/19/03 06/04/04 05/15/06 08/24/09 VGESMTBE ND(20) ND(20.0) ND(10.0) ND(10.0) 5.3 ND(2.0) ND(4.0) 40Benzene 4.8 2.0 5.4 14.2 7.6 ND(1.0) 157. 5Toluene 2.2 ND(2.0) 8.9 ND(5.0) ND(1.0) ND(1.0) 50.0 1,000Ethylbenzene 45.3 10.5 46.1 9.5 6.3 ND(1.0) 8.7 700Xylenes 28.0 9.4 14.9 ND(10.0) 5.4 2.7 14.5 10,0001,3,5-Trimethylbenzene 47.8 48.0 29.3 ND(5.0) 8.0 ND(1.0) ND(2.0)1,2,4-Trimethylbenzene 16.8 28.8 56.2 16.4 46.3 13.7 4.7Naphthalene 13.3 58.5 102. 40.1 32.0 3.3 7.7 20Total BTEX 80.3 21.9 75.3 23.7 19.3 2.7 230. -Total VOCs 158.2 157.2 263. 80.2 110.9 19.7 243. -

PARAMETER 12/14/09 11/04/11 06/29/12 VGESMTBE ND(10.0) ND(2.0) 11.8 40Benzene 9.7 ND(1.0) ND(2.0) 5Toluene 9.6 5.9 18.6 1,000Ethylbenzene ND(5.0) 14.3 48.9 700Xylenes ND(10.0) 14.0 128. 10,0001,3,5-Trimethylbenzene ND(5.0) 35.6 6.51,2,4-Trimethylbenzene ND(5.0) 6.6 8.6Naphthalene ND(10.0) 29.8 7.8 20Total BTEX 19.3 34.2 195.5 -Total VOCs 19.3 106.2 230.2 -

VGES = Vermont Groundwater Enforcement Standard 2/26/07All Values Reported in ug/L (ppb) Detections are in bold. >VGESND - not detected (1.0) - detection limitAnalysis by EPA Method 8021B.

MW1

350

350

89.80

90.00

90.20

90.40

90.60

90.80

91.00

91.20

91.40

0.0

50.0

100.0

150.0

200.0

250.0

300.0

07/24/98 12/06/99 04/19/01 09/01/02 01/14/04 05/28/05 10/10/06 02/22/08 07/06/09 11/18/10 04/01/12 08/14/13

Gro

undw

ater

Ele

vatio

n (ft

)

Con

cent

ratio

n (p

pb)

Date

Total Targeted VOC Concentration and Groundwater Elevation, MW-1

Total Targeted VOCs

Groundwater Elevations



Monitoring Well MW-2MW-2

PARAMETER 04/12/00 05/07/01 05/16/02 05/19/03 08/24/09 12/14/09 11/04/11 VGESMTBE ND(10) ND(10.0) ND(5.0) ND(2.0) ND(2.0) ND(2.0) 40Benzene ND(1) ND(1.0) ND(1.0) Removed ND(1.0) ND(1.0) ND(1.0) 5Toluene ND(1) ND(1.0) ND(1.0) From ND(1.0) ND(2.0) ND(1.0) 1,000Ethylbenzene ND(1) ND(1.0) ND(1.0) Sampling ND(1.0) ND(1.0) ND(1.0) 700Xylenes ND(1) ND(1.0) ND(1.0) Schedule ND(2.0) ND(2.0) ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 3501,2,4-Trimethylbenzene ND(1) ND(1.0) ND(1.0) 1.1 ND(1.0) ND(1.0)Naphthalene ND(1) ND(1.0) ND(1.0) ND(2.0) ND(2.0) ND(2.0) 20Total BTEX ND ND ND ND ND ND -Total VOCs ND ND ND 1.1 ND ND -

Monitoring Well MW-2MW-2

PARAMETER 06/29/12 VGESMTBE ND(2.0) 40Benzene ND(1.0) 5Toluene ND(1.0) 1,000Ethylbenzene ND(1.0) 700Xylenes ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1.0) 3501,2,4-Trimethylbenzene ND(1.0)Naphthalene ND(2.0) 20Total BTEX ND -Total VOCs ND -


Monitoring well MW-3MW3

PARAMETER 04/12/00 05/07/01 05/16/02 05/19/03 08/24/09 12/14/09 11/04/11 VGESMTBE ND(10) ND(10.0) ND(5.0) ND(2.0) ND(2.0) ND(2.0) 40Benzene ND(1) ND(1.0) ND(1.0) Removed ND(1.0) ND(1.0) ND(1.0) 5Toluene ND(1) ND(1.0) ND(1.0) From ND(1.0) ND(1.0) ND(2.0) 1,000Ethylbenzene ND(1) ND(1.0) ND(1.0) Sampling ND(1.0) ND(1.0) ND(1.0) 700Xylenes ND(1) ND(1.0) ND(1.0) Schedule ND(2.0) ND(2.0) ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0) 3501,2,4-Trimethylbenzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0)Naphthalene ND(1) ND(1.0) ND(1.0) ND(2.0) ND(2.0) ND(2.0) 20Total BTEX ND ND ND ND ND ND -Total VOCs ND ND ND ND ND ND -


PARAMETER 06/29/12 VGESMTBE ND(2.0) 40Benzene ND(1.0) 5Toluene ND(1.0) 1,000Ethylbenzene ND(1.0) 700Xylenes ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1.0) 3501,2,4-Trimethylbenzene ND(1.0)Naphthalene ND(2.0) 20Total BTEX ND -Total VOCs ND -





PARAMETER 04/12/00 05/07/01 05/16/02 05/19/03 08/24/09 12/14/09 11/04/11 VGESMTBE ND(10) ND(10.0) ND(5.0) ND(2.0) ND(2.0) ND(2.0) 40Benzene ND(1) ND(1.0) ND(1.0) Removed ND(1.0) ND(1.0) ND(1.0) 5Ethylbenzene ND(1) ND(1.0) ND(1.0) From ND(1.0) ND(2.0) ND(2.0) 1,000Toluene ND(1) ND(1.0) ND(1.0) Sampling ND(1.0) ND(1.0) ND(1.0) 700Xylenes ND(1) ND(1.0) ND(1.0) Schedule ND(2.0) ND(2.0) ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0)1,2,4-Trimethylbenzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) ND(1.0)Naphthalene ND(1) ND(1.0) ND(1.0) ND(2.0) ND(2.0) ND(1.0) 20Total BTEX ND ND ND ND ND ND -Total VOCs ND ND ND ND ND ND -


PARAMETER 06/29/12 VGESMTBE ND(2.0) 40Benzene ND(1.0) 5Ethylbenzene ND(1.0) 1,000Toluene ND(1.0) 700Xylenes ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1.0)1,2,4-Trimethylbenzene ND(1.0)Naphthalene ND(2.0) 20Total BTEX ND -Total VOCs ND -


Monitoring well MW-5/RW09-01MW5 / RW09-01

PARAMETER 04/12/00 05/07/01 05/16/02 05/19/03 06/04/04 05/15/06 08/24/09 VGESMTBE ND(10) 22.3 ND(5.0) ND(2.0) ND(2.0) 40Benzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) Removed Not 5Toluene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) From Sampled 1,000

350

350


Toluene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) From Sampled 1,000Ethylbenzene ND(1) ND(1.0) ND(1.0) ND(1.0) ND(1.0) Sampling 0.05' 700Xylenes 8.0 1.7 ND(1.0) ND(2.0) ND(2.0) Schedule LNAPL 10,0001,3,5-Trimethylbenzene 12.1 10.8 ND(1.0) ND(1.0) ND(1.0)1,2,4-Trimethylbenzene 28.5 23.5 2.1 ND(1.0) ND(1.0)Naphthalene 5.0 2.9 ND(1.0) ND(1.0) ND(1.0) 20Total BTEX 8.0 1.7 ND ND ND -Total VOCs 53.6 61.2 2.1 ND ND -

Monitoring well MW-5/RW09-01RW09-01

PARAMETER 12/14/09 11/04/11 06/29/12 VGESMTBE ND(40.0) ND(200) 40Benzene Not 5,840. 1,800. 5Toluene Sampled 55,800. 35,000. 1,000Ethylbenzene 2.02' 2,780. 1,580. 700Xylenes LNAPL 14,600. 7,840. 10,0001,3,5-Trimethylbenzene 923. 413.1,2,4-Trimethylbenzene 2,460. 1,210.Naphthalene 321. 323. 20Total BTEX 79,020. 46,220. -Total VOCs 82,724. 48,166. -


350

350



Monitoring well MW09-06

PARAMETER 08/24/09 12/14/09 11/04/11 06/29/12 VGESMTBE ND(200) ND(200) ND(400) 40Benzene 3,160. 729. Not 230. 5Toluene 23,300. 7,010. Sampled 21,900. 1,000Ethylbenzene 1,640. 657. 0.04' 3,040. 700Xylenes 5,410. 1,690. LNAPL 11,800. 10,0001,3,5-Trimethylbenzene 176. ND(100) 547.1,2,4-Trimethylbenzene 628. 246. 1,420.Naphthalene ND(200) ND(200) ND(400) 20Total BTEX 33,510. 10,086. 36,970. -Total VOCs 34,314. 10,332. 38,937. -


350

MW09-06

90.50

90.60

90.70

90.80

90.90

91.00

91.10

91.20

91.30

91.40

0.

5,000.

10,000.

15,000.

20,000.

25,000.

30,000.

35,000.

40,000.

45,000.

12/18/08 07/06/09 01/22/10 08/10/10 02/26/11 09/14/11 04/01/12 10/18/12

Gro

undw

ater

Ele

vatio

n (ft

)

Con

cent

ratio

n (p

pb)

Date

Total Targeted VOC Concentration and Groundwater Elevation, MW09-06

Total Targeted VOCs





PARAMETER 08/24/09 12/14/09 11/04/11 06/29/12 VGESMTBE ND(100) ND(100) ND(40.0) ND(100) 40Benzene 2,310. 1,890. 1,160. 3,140. 5Toluene 4,640. 5,310. 6,940. 39,400. 1,000Ethylbenzene 388. 447. 460. 2,240. 700Xylenes 1,080. 1,010. 1,640. 8,350. 10,0001,3,5-Trimethylbenzene ND(50.0) ND(50.0) 46.6 286.1,2,4-Trimethylbenzene 82.4 79.0 197. 685.Naphthalene ND(100) ND(100) 78.8 252. 20Total BTEX 8,418. 8,657. 10,200. 53,130. -Total VOCs 8,500. 8,736. 10,522. 54,353. -


MW09-07

350

89.50

89.55

89.60

89.65

89.70

89.75

89.80

89.85

89.90

89.95

0.

10,000.

20,000.

30,000.

40,000.

50,000.

60,000.

12/18/08 07/06/09 01/22/10 08/10/10 02/26/11 09/14/11 04/01/12 10/18/12

Gro

undw

ater

Ele

vatio

n (ft

)

Con

cent

ratio

n (p

pb)

Date


Total Targeted VOCs





PARAMETER 08/24/09 12/14/09 11/04/11 06/29/12 VGESMTBE ND(20.0) 68.6 ND(20.0) ND(40.0) 40Benzene 613. 2,690. 58.8 23.1 5Toluene 741. 5,570. 37.0 91.5 1,000Ethylbenzene 86.7 574. 328. 628. 700Xylenes 229. 2,010. 129. 2,130. 10,0001,3,5-Trimethylbenzene ND(10.0) 40.1 ND(10.0) 78.01,2,4-Trimethylbenzene 25.8 211. 181. 235.Naphthalene ND(20.0) 33.1 ND(20.0) 66.9 20Total BTEX 1,670. 10,844. 553. 2,873. -Total VOCs 1,696. 11,197. 734. 3,253. -


MW09-08

350

89.40

89.50

89.60

89.70

89.80

89.90

90.00

90.10

90.20

90.30

0.

2,000.

4,000.

6,000.

8,000.

10,000.

12,000.

12/18/08 07/06/09 01/22/10 08/10/10 02/26/11 09/14/11 04/01/12 10/18/12

Gro

undw

ater

Ele

vatio

n (ft

)

Con

cent

ratio

n (p

pb)

Date


Total Targeted VOCs




Recovery well RW12-02

PARAMETER 06/29/12 VGESMTBE ND(40.0) 40Benzene 180. 5Toluene 2,240. 1,000Ethylbenzene 972. 700Xylenes 4,630. 10,0001,3,5-Trimethylbenzene 136.1,2,4-Trimethylbenzene 380.Naphthalene 77.0 20Total BTEX 8,022. -Total VOCs 16,637. -


Monitoring Well MW12-09

PARAMETER 06/29/12 VGESMTBE ND(2.0) 40Benzene ND(1.0) 5Toluene ND(1.0) 1,000Ethylbenzene ND(1.0) 700Xylenes ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1.0)1,2,4-Trimethylbenzene ND(1.0)Naphthalene ND(2.0) 20Total BTEX ND -Total VOCs ND -


RW12-02

350

MW12-09

350




PARAMETER 06/29/12 VGESMTBE 3.4 40Benzene ND(1.0) 5Toluene ND(1.0) 1,000Ethylbenzene ND(1.0) 700Xylenes ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1.0)1,2,4-Trimethylbenzene ND(1.0)Naphthalene ND(2.0) 20Total VOCs 3.4 -



PARAMETER 06/29/12 VGESMTBE ND(2.0) 40Benzene 7.5 5Toluene ND(1.0) 1,000Ethylbenzene ND(1.0) 700Xylenes ND(2.0) 10,0001,3,5-Trimethylbenzene ND(1.0)1,2,4-Trimethylbenzene ND(1.0)Naphthalene 2.9 20Total VOCs 10.4 -


MW12-11

350

MW12-10

350

VTDEC Site #2000-2740VTDEC Site #2000-2740

GROUNDWATER QUALITYQA/QC SUMMARY

Ethan Allen MobilBurlington, Vermont

Parameter Trip Blank MW-3 Duplicate (MW-3) RPD

MTBE ND(2.0) ND(2.0) ND(2.0) - Benzene ND(1.0) ND(1.0) ND(1.0) - Toluene ND(1.0) ND(1.0) ND(1.0) - Ethylbenzene ND(1.0) ND(1.0) ND(1.0) - Xylenes ND(2.0) ND(2.0) ND(2.0) - 1,3,5-Trimethylbenzene ND(1.0) ND(1.0) ND(1.0) - 1,2,4-Trimethylbenzene ND(1.0) ND(1.0) ND(1.0) - Naphthalene ND(1.0) ND(2.0) ND(2.0) - Total Targeted VOCs ND ND ND -

RPD: Relative Percent DifferenceAll values in µg/L (ppb)ND( ): Not detected (detection limit)TPH-DRO values reported by lab as mg/L(ppm), converted to µg/LAnalytical results expressed to 3 significant digitsNA: Not Applicable; RPD can not be calculated on non-detect valuesNT: Not Tested

Sample Date: June 29, 2012




Groundwater Analytical Reports

Laboratory Report

402060232 Ethan Allen MobilPROJECT:

DATE RECEIVED:WORK ORDER:

DATE REPORTED:

100306KAS, Inc.PO Box 787Williston, VT 05495

Atten: Sam Driver SAMPLER:July 09, 2012

1207-09422

Lauren Morley

July 02, 2012

Reviewed by:

Harry B. Locker, Ph.D.Laboratory Director

Enclosed please find the results of the analyses performed for the samples referenced on the attached chain of custody. All required method quality control elements including instrument calibration were performed in accordance with method requirements and determined to be acceptable unless otherwise noted.

The column labeled Lab/Tech in the accompanying report denotes the laboratory facility where the testing was performed and the technician who conducted the assay. A "W" designates the Williston, VT lab under NELAC certification ELAP 11263; "R" designates the Lebanon, NH facility under certification NH 2037 and “N” the Plattsburgh, NY lab under certification ELAP 11892. “Sub” indicates the testing was performed by a subcontracted laboratory. The accreditation status of the subcontracted lab is referenced in the corresponding NELAC and Qual fields.

The NELAC column also denotes the accreditation status of each laboratory for each reported parameter. “A” indicates the referenced laboratory is NELAC accredited for the parameter reported. “N” indicates the laboratory is not accredited. “U” indicates that NELAC does not offer accreditation for that parameter in that specific matrix. Test results denoted with an “A” meet all National Environmental Laboratory Accreditation Program requirements except where denoted by pertinent data qualifiers. Test results are representative of the samples as they were received at the laboratory

Endyne, Inc. warrants, to the best of its knowledge and belief, the accuracy of the analytical

test results contained in this report, but makes no other warranty, expressed or implied, especially no warranties of merchantability or fitness for a particular purpose.

160 James Brown Dr., Williston, VT 05495Ph 802-879-4333 Fax 802-879-7103

ELAP 11263

www.endynelabs.com

NH203756 Etna Road, Lebanon, NH 03766 Ph 603-678-4891 Fax 603-678-4893

Laboratory Report

KAS, Inc.

Page 2 of 4

CLIENT:PROJECT: 402060232 Ethan Allen Mobil

WORK ORDER:DATE RECEIVED:

1207-0942207/02/2012

7/9/2012REPORT DATE:

001 Date Sampled: 6/29/12Site: MW-1 7/5/12 RBFWAnalysis Date:11:12QualNelacUnitResultParameterQualNelacUnitResultParameter

TEST METHOD: EPA 8021B

11.8 NMethyl-t-butyl ether (MTBE) ug/L < 2.0 NBenzene ug/L18.6 NToluene ug/L 48.9 NEthylbenzene ug/L128 NXylenes, Total ug/L 6.5 N1,3,5-Trimethylbenzene ug/L8.6 N1,2,4-Trimethylbenzene ug/L 7.8 NNaphthalene ug/L96 NSurr. 1 (Bromobenzene) % > 10 NUnidentified Peaks



< 2.0 NMethyl-t-butyl ether (MTBE) ug/L < 1.0 NBenzene ug/L< 1.0 NToluene ug/L < 1.0 NEthylbenzene ug/L< 2.0 NXylenes, Total ug/L < 1.0 N1,3,5-Trimethylbenzene ug/L< 1.0 N1,2,4-Trimethylbenzene ug/L < 2.0 NNaphthalene ug/L109 NSurr. 1 (Bromobenzene) % 0 NUnidentified Peaks






< 2.0 NMethyl-t-butyl ether (MTBE) ug/L < 1.0 NBenzene ug/L< 1.0 NToluene ug/L < 1.0 NEthylbenzene ug/L< 2.0 NXylenes, Total ug/L < 1.0 N1,3,5-Trimethylbenzene ug/L< 1.0 N1,2,4-Trimethylbenzene ug/L < 2.0 NNaphthalene ug/L

99 NSurr. 1 (Bromobenzene) % 0 NUnidentified Peaks

005 Date Sampled: 6/29/12Site: RW09-01 7/5/12 RBFWAnalysis Date:10:47QualNelacUnitResultParameterQualNelacUnitResultParameter


< 200 NMethyl-t-butyl ether (MTBE) ug/L 1,800 NBenzene ug/L35,000 NToluene ug/L 1,580 NEthylbenzene ug/L7,840 NXylenes, Total ug/L 413 N1,3,5-Trimethylbenzene ug/L1,210 N1,2,4-Trimethylbenzene ug/L 323 NNaphthalene ug/L


Laboratory Report

KAS, Inc.

Page 3 of 4



1207-0942207/02/2012


006 Date Sampled: 6/29/12Site: RW12-02 7/5/12 RBFWAnalysis Date:11:33QualNelacUnitResultParameterQualNelacUnitResultParameter


< 40.0 NMethyl-t-butyl ether (MTBE) ug/L 180 NBenzene ug/L2,240 NToluene ug/L 972 NEthylbenzene ug/L4,630 NXylenes, Total ug/L 136 N1,3,5-Trimethylbenzene ug/L380 N1,2,4-Trimethylbenzene ug/L 77.0 NNaphthalene ug/L88 NSurr. 1 (Bromobenzene) % 5 NUnidentified Peaks

007 Date Sampled: 6/29/12Site: MW09-06 7/5/12 RBFWAnalysis Date:11:05QualNelacUnitResultParameterQualNelacUnitResultParameter


< 400 NMethyl-t-butyl ether (MTBE) ug/L 230 NBenzene ug/L21,900 NToluene ug/L 3,040 NEthylbenzene ug/L11,800 NXylenes, Total ug/L 547 N1,3,5-Trimethylbenzene ug/L1,420 N1,2,4-Trimethylbenzene ug/L < 400 NNaphthalene ug/L100 NSurr. 1 (Bromobenzene) % 1 NUnidentified Peaks



< 100 NMethyl-t-butyl ether (MTBE) ug/L 3,140 NBenzene ug/L39,400 NToluene ug/L 2,240 NEthylbenzene ug/L8,350 NXylenes, Total ug/L 286 N1,3,5-Trimethylbenzene ug/L685 N1,2,4-Trimethylbenzene ug/L 252 NNaphthalene ug/L85 NSurr. 1 (Bromobenzene) % 0 NUnidentified Peaks



< 40.0 NMethyl-t-butyl ether (MTBE) ug/L 23.1 NBenzene ug/L91.5 NToluene ug/L 628 NEthylbenzene ug/L2,130 NXylenes, Total ug/L 78.0 N1,3,5-Trimethylbenzene ug/L235 N1,2,4-Trimethylbenzene ug/L 66.9 NNaphthalene ug/L95 NSurr. 1 (Bromobenzene) % 6 NUnidentified Peaks

010 Date Sampled: 6/29/12Site: WM12-09 7/5/12 RBFWAnalysis Date:12:12QualNelacUnitResultParameterQualNelacUnitResultParameter



Laboratory Report

KAS, Inc.

Page 4 of 4



1207-0942207/02/2012




3.4 NMethyl-t-butyl ether (MTBE) ug/L < 1.0 NBenzene ug/L< 1.0 NToluene ug/L < 1.0 NEthylbenzene ug/L< 2.0 NXylenes, Total ug/L < 1.0 N1,3,5-Trimethylbenzene ug/L< 1.0 N1,2,4-Trimethylbenzene ug/L < 2.0 NNaphthalene ug/L107 NSurr. 1 (Bromobenzene) % 3 NUnidentified Peaks

012 Date Sampled: 6/29/12Site: MW-12-11 7/5/12 RBFWAnalysis Date:12:32QualNelacUnitResultParameterQualNelacUnitResultParameter


< 2.0 NMethyl-t-butyl ether (MTBE) ug/L 7.5 NBenzene ug/L< 1.0 NToluene ug/L < 1.0 NEthylbenzene ug/L< 2.0 NXylenes, Total ug/L < 1.0 N1,3,5-Trimethylbenzene ug/L< 1.0 N1,2,4-Trimethylbenzene ug/L 2.9 NNaphthalene ug/L

86 NSurr. 1 (Bromobenzene) % > 10 NUnidentified Peaks

013 Date Sampled: 6/29/12Site: Duplicate 7/5/12 RBFWAnalysis Date:10:10QualNelacUnitResultParameterQualNelacUnitResultParameter


< 2.0 NMethyl-t-butyl ether (MTBE) ug/L < 1.0 NBenzene ug/L< 1.0 NToluene ug/L < 1.0 NEthylbenzene ug/L< 2.0 NXylenes, Total ug/L < 1.0 N1,3,5-Trimethylbenzene ug/L< 1.0 N1,2,4-Trimethylbenzene ug/L < 2.0 NNaphthalene ug/L


014 Date Sampled: 6/29/12Site: Trip Blank 7/5/12 RBFWAnalysis Date:08:00QualNelacUnitResultParameterQualNelacUnitResultParameter



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