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Transcript
Page 1: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

S upedu nd Fiec^rd s C enterSITE:

OTHER:

FIVE-YEAR REVIEW REPORT

First Five-Year Review Reportfor lth<E! Barkhamsted-New Hartford Landfill

Barkhamsted-New Hartford, Connecticut

September 2003

Prepared By:

United States Environmental Protection AgencyRegiont II

Boston, Massachusetts

Approved by :Susan Studlien, Acting Director DateOffice of Site Remediation And Restoration

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First Five-Year Review Report for the Barkhamsled-New Hartford ILandfill!09/17/03

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TABLE OF CONTENTS

TABLE OF CONTENTS 2

LIST OF ACRONYMS AMD ABBREVIATIONS 5

EXECUTJVE SUM MARY 6

FIVE-YEAR REVIEW SUMMA R.Y FORM 7

1.0 INTRODUCTION 10

2.0 SITE CHRONOLOGY 11

3.0 BACKGROUND 13

3.1 Physical Characteristics 13

3.2 Land and Resource Use 13

3.3 History of Contamination 14

3.4 Initial Response 15

3.5 Basis for Talk ing Action 16

4.0 REMEDIAL ACTIONS 17

4.1 Remedy Selection and Remedial Action Objectives 17

4 .1 .1 Source Control 18

..1,2 Management of Migration 18

4.2 Remedy Implementation 19

4.3 Sy stem Operations/Operation and Maintenance (O&M) 20

5.0 PROGRESS SI NCE THE LAST FIVE-Y EA R REV IEW 21

6.0 FIVE-YEA R REVIEW PROCESS 21

6.1 Communi ty Notification and Involvement 21

6.2 Document Review 22

6.3 Data Review 2 3

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Page :t of 32

6.4 Si te 1 nspec t i o n . . . 24

6.5 1 nlerv iews 24

7 TECHNICAL ASSESSMENT 25

7.1 1 s the Remedy func t ioning as intended by the decis ion docu merits9 25

7.2 Are the exposure assumptions, toxiciry dala, cleanup levels, and remedial actionobjec I ives (RAOs) used a t the time of reined y s,e lee t ion sti 11 v a lid9 26

7.2.1 Changes in Exposure Pathways 26

7.2.2 Changes in Toxiciry, ARARs, and Other Contaminant Characteristics. . 26

7.2.3 Ex pected Progress Towards Meeti ng R A Os 29

7.3 Other information that could call into question the protectiveness of the remedy 30

7.4 Technical A sses sment Summary 30

8 ISSUES 30

9 R ECOM M END ATI ON S AN D FOLLOW-U P ACT! ON S 31

10 PROTECTIVEN ES S STATEMENT 31

1 1 NEXT REVIEW 31

REFERENCES 32

FIGURES

1 Site Location Map

2 Overburden Groundwater Contour Map • April 30, 2003

3 Shallow Bedrock Groundwatei Contour Map - April 30, 2003

4 Overburden Total VOCs and SVOCs Concentration Map - April 30 - May 8, 2003

5 Overburden Total BTEX Concentration Map - April 30 - May 8, 2003

6 Shallow Bedrock Total VOCs and SVOCs Concent ration Map - Apr i l 30 - May 8, 2003

7 Shallow Bedrock Total BTEX Concentration Map - Apr i l 30 - May 8, 2003

8 Pote nt lal ly Complete Exposure Pathways

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TABLE'S

1 Chronology of Site Events

2 Contaminants of Concern and Other Target Analytes

3 Annual Operations/O&M Costs

4 Review of Site-Related Documents

5 Groundwater Analytical Results

6 Changes In Cancer Toxic ity Data

7 Changes In Non-Cancer Toxiciry Data

8 Recommendations and Follow-Up Actions

APPENDICES

A. Landfill Inspection Checklist

B Applicable or Relevant and Appropriate Requirements

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LIST OF ACRONYMS AND ABBREVIATIONS

ARARs Applicable or Relevant and Appropriate Requirementsbgs Bel ow ground surfaceCERCLA Comprehensive Environmental Response, Compensation and

Liability ActCFR Code of Federal RegulationsCOCs Contaminants of ConcernCOPC Contaminants of Potential ConcernCT'DEP Connecticut Department of Environmental ProtectionEPA United States Environmental Protection AgencyELIJR Environmental Land Use RestrictionFS Feasibility StudyFSP Field Sampling PlanMCLs Maximum Contaminant LevelsMC LG M ax imum Contaminant Level GoalsMDL Method Detection LimitMN A M oni tored Natural Attenualio nNPL N ationa I Prior ities Listisri'CRA Non-Time Critical Removal ActionOHM Oil and/or Hazardous MaterialOMM Operations and Maintenance ManualOil Operable Unitppm Parts per millionppb Parts per billionPOTW Publicly Owned Treatment 'WorksPRP Potentially Responsible PartyPQ L Practical Qu anti tation LimitPSD Performing Settling DefendantQAPP Quality Assurance Project PlanRA Remedial ActionRAO Re sponse Act ion Objectiv esRAP Remedial Action PlanRCRA Resource Conservation and Recovery ActRI Remedi all 1 nve st igationROD Record of DecisionSVOCs Sera ivola tile organic compoundsVOCs Volatile Organic. Compounds

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EXECUTIVE SUMMARY

The remedy selected to address contamination al the Barkhamsted-New Hartford Landfillsite (hereinafter referred to as the 'Site'), located in the town of Barkhamsted, LitchfieldCounty, Connecticut was Monitored Natural Attenuation (VINA) of Site groundwater(deemed as the only medium requiring further remediation). This landfill was capped aspart of a Non-Time Critical Removal Action (NTCRA) lead by the Connecticut Departmentof Environmental Protection (CTDEP) to address source materials and principal-threatwastes The CTDEP approved the landfill closure in January 1998. The Record ofDecision (ROD) indicating that MNA was the selected remedy was. approved on September28, 2001 (EPA, 2001b) incorporated the landfill cap into the final remedy. Quarterlysampling of groundwater monitoring wells at the landfill to meet CTDEP requirements hasbeen ongoing Quarterly sampling of groundwater monitoring wells at the landfill pursuantto the ROD began in April and May of 2003. The trigger for this five-year review was theRecord of Decision in 2001, however since the NTCRA (3998) left waste in place, thisfive-year review was conducted at this time under EPA's discretionary authority.

The assessment of the five-year review found that the remedy is functioning as designedThe immediate threats to human health and the environment have been addressed bycapping the landfill. The selected groundwater remedy is MNA Once the ground watercleanup goals have been achieved, in approximately 16 years (see O'Brien & GereEngineers, Inc. 200 l a ) , the groundwater remedy will be protective of human health and theenvironment. In the interim, exposure pathways that could result in unacceptable risks arebeing controlled. Environmental Land Use Restrictions (ELDRs), which prohibit theinslallation of drinking water wells,, have been placed on the main facility property.

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FIVE-YE AM REVIEW SUMMAR Y FORM

mm MMm lllmmMmmSite Name: Barkhamsled-New Hartford LandfillEPA CERCLIS CD:: CTD980732333Region 1 State: CT City/County: Baikhamsted , CTBlfflifl B IM 1 1 M

NFL Status: X Final Deleted Other (Specify)Remediation Status (choose all that apply): Under Construction X Operating CompleteMullipleOUs? Yes X No Construction Complete Date: 9/r28/r()lHas site been put into reuse? Yes X Mo•MI KM MI ••Lead Agency: X EPA State Tribe Other Federal AgencyAuthors Names: Byron M'aJh, Alan Walker, Eric Nichols, Tracey Costa

Authors' Titles/AffUiation : Byron Man, RPM, EPAAllen R. Walker, P.E., LSP-Senior Engineer/ Project Manager,Eric Nichols, Vice-President, LFRTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR

LFR

Review Period : 1 /S/98-9/ 1 7/03Pafte(s) oif Site Inspection :Type of Review:

X Post- SARANon-NPL Remedial

Ac t ion Site

April 29-May 8, '2003, June 24, 2003

Pre-SARA NP L-Removal OnlyNPL State/Tribe Lead X Regional Discretion

Review Number: X I (f irst) 2 (second) 3Triggering Action:

X Actual RA Onsile Construction at OU# 1(NTCRA)andROD

Construction Complet ion

(third) Other (specify)

Actual RA Start at OU #

Previous Five- Year Review Report

Triggering Action dale (from WasteLAN): 9/218/01Due Date: 9/28/06

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FIVE-YEAR REVIEW SUMMARY FORM (CONT'D)

Issues:

The following issues arose during recent groundwaler sampling activities conducted in Apr i land May 2003:

• The discovery of four 55-gallon drums at well MW-l 1 1 . Two of the drums were rusted andempty The other two drums contained approximately 2 to 20 gallons of groundwater purgewater based on the labeling of the drums. No visual or olfactory evidence of oil and torhazardous materials (OHM) was encountered within or in the area sun on tiding the drums.Samples were collected from each drum and analyzed for Volatile Organic Compounds(VOCs) and metals. CTDEP was present during sampling activities The sample resultswere consistent with purge water and the drums were removed with the water discharged tothe landfill leachate holding tank for later disposal.

• Three groundwater-monitoring wells were deemed as inaccessible and could not besampled. Inaccessibility was attributed to the following:

> MW-113I : The well casing was damaged (bent) and would not allow for insertion of thesampling pump.

> MW-113D A submersible pump and associated cable (used for previous sampling,)were abandoned in the well and could not be removed.

> MW-4R: An unknown obstruction present at an approximate depth of 12 feet belowg round surface (bgs).

Recommend,EI I ions amid Follow-Up Actions:

• Continued monitoring of Site groundwater, potential leachate seeps, soil, surface water and sediment, a&requ tred.

• Continue to verify that natural attenuation is occurring.• Adoption of environmental land use restriction (ELUR) for the properties other than the RRDD#1

facility.• Continued maintenance of the enlisting landfill cap cover.• Repair of damaged wells MW-1131, M W - l 13D, and MW-4R do nor appear necessary at this time, but

the potential need for these wells will be evaluated further with new data.» To more clearly define the extent of the Contaminants of Concern (COCs), EPA recommends thai

existing additional wells be sampled in future sampling events. The proposed wells to be sampledinclude wells MW-105S and B, MW-108S and B, MW-109B, M W - l I7S and B, arid MW-H8S and B.

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FIVE-YE AM ME'VIEW SUMMAR Y FORM (CONT'D)

Protectiveness Slail ement:

The assessment of the five-year review found that the remedy is functioning, as designed. Theimmediate threats have been addressed through the construction, operation, and maintenance ofthe landfill capping. The ground water remedy (MNA) is currently protective of human healthand the environment as the plume is not expanding, impacting drinking water wells, and peopleare not. drinking the impacted ground water. In addition, CT'DEP has signed the ELURs on theRRDD $1 property and is in the process of signing the other areas impacted by Site relatedcontaminants. ELURs are institutional controls, which prohibit the installation of drinkingwater wells.

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1.0 INTRODUCTICW

The purpose of this five-year review is to determine whether the remedy for theBarkham sled-New Hartford Landfill Superfund Site (Site) is protective of human health andthe environment. The methods, findings and conclusions of this review are documented inthis first five-year review report. In addition, this report identifies issues encounteredduring preparation of this five-year review, along, with recommendations to address suchissues.

The United States Environmental Protection Agency (EPA) must implement five-yearreviews pursuant to the Compiehensive Environmental Response, Compensation andLiability Act (CERCLA) Section 121 and the National Contingency Plan (NCR). CERCLASection 121(c) 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 suchremedial action no less often than each f i v e years after f he initiation of such remedialaction to assure thai human health and the environment are being protected by theremedial action being implemented. In addition, if upon such review it is the judgementof the President that action is appropriate at such Site in accordance with section 9604[104} or 9606 [1061, the President shall take or require such action. The President shallreport to the Congress a lisf of facilities for which such review is required, the results ofall such reviews, and any actions taken as a result of such reviews

The Agency reported this requirement further in the NCP, part 300.430(f)(4)(ii) of theCode of Federal Regulations (CFR) states:

If a remedial action is selected that results in hazardous substances, pollutants, orcontaminants remaining at the Site above levels thai allow for unlimited use andunrestricted exposure, the lead agency shall review such action no less often than everyfive years after the initiation of the. selected remedial action

This is the first five-year review for the Site. The trigger for this five-year review was theRecord of Decision in 2001, however., since the Mon Time Critical Removal Action(NTCRA) (1998) left waste in place,, this five-year review was conducted at this time underEPA's discretionary authority. The five-year review (statutory) is required due to the factthat hazardous substances., pollutants, or contaminants remaining at the Sue are abovelevels that allow for unlimited use and umes,dieted exposure. This five-year review hasbeen prepared following guidance provided by EPA (200la). The EPA Region 1 ,conducted the five-year review of the remedy implemented at the Site. This review was

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concluded by the Remedial Project Manager (RPM) for the entire Site from May 1, 2003 toAugust 28, 2003. This report documents the results of the review.

The selected remedial action to reduce impact of designated COCs to groundwalter (deemedas the only medium requiring remediation) is Monitored Natural Attenuation (MNA) of Sitegroundwater. LFR Levine' Fiicke (LFR) was selected as the contractor on behalf of thePotentially Responsible Party (PRP) in February 2003. LFR conducted the initial quarterlygroundwater-sampling event, pursuant to the ROD. in Apr i l and May 200.3 program.

2,0 SITE CHRONOLOGY

The chronology of the Site, including, significant events and dates is addressed in Tableall of which occurred at one operating unit (OIJ).

TABLE 1: CHRONOLOGY OF SITE EVENTS

Dale(Month/year)

September 1970September 1972

1970's

January 1974April 19741974-1979

April 1974-August 1988

19801981

March 1981July 1981

1983

Move tuber 1983

December 16,1983

Environmental Issue/Event/milesloae

Regional Refuse Disposal District. No. I (RRDEW'l) was formed.RRDDll received CTDEP soil waste permit 0005-2L. The RRDD#Ipurchased the Barkhamsted property from the Town of Barkhamsted.Operation of chemical pit that received oily sludge with metal grinclings anddegreasersModification to the RRDDl 1 solid waste permit was issued.The landfill became operational.CTDEP solid waste reports document lack of daily cover material; additionalissues include ponding, of water on landfill surface and encroachment of brushand bulky waste onto 50-foot buffer zone.Barkhamsted landfill Site was used for the disposal of solid waste.

CTD EP inspect ion of (he Site .EPA conducted a preliminary assessment for the Site.CTDEP requests RRDD#1 to remove hazardous waste from the facilityCTDEP formerly approved disposal of metal grinding waste at Site.Two complaints received concerning the presence of a large number of drums;CTDEP requests that 25 drums containing suspect motor oil be re-located to apaved area on-Site.Thirty drums discovered near the scrap metal area (north of toe of landfill andNW of garage)A modification to the landfill operating permit was issued.

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First Five-Yeair Review Report for the Barkhamsled-New Hartford Landliill09/17/03

("age 12 of 3 2

1984

September 1986March- 1987

N ove mber -December 1988

August 1988 -October 1993

198,8,

October 5, 1989February 1990

1990

October 4, 1991

Dec 1991 -Jan1992

December 1991

November 1992

October 1993April 1994

September 26,1994

October 1994January 1995

February 1 996September 1996

1998

Requirement for a new metals grind ings cell. Metal grind ings were stored onSite in 55 -gal Ion drums.C'T'DEP acknowledges handling of waste oil and batteries for recycling.NTJS Corporation conducts Site inspection., on behalf of EPA. -Site receiveshazard ranking score (HRS) of 52.00., later lowered to 38.0.5, due to lowpopulation density and fact that area served by public water supply.Solid waste was disposed at the Site because Connecticut Resources RecoveryAuthority's (CRRA) mid-Connecticut "Waste to Energy" Plant wasinoperable .Disposal of bulky and non-processible waste only.

CTDEP document, states that, one half of the barrels received at the Sitecontained unspecified amounts of chlorinated hydrocarbons or methyl ethylketone.Barkhamsted Site listed on NPLMinor amendment was granted to the RRDEM'l solid waste permit allowinglandfill to accept dewatered sludge from Winsted's publicly owned treatmentworks (POTW).CTDEP Administrative order to investigate waste materials; determine extentof impact and potential impact to soil, surface water and groundwaterCERCLA Administrative Order to Conduct Remedial Investigation/FeasibilityStudy (RI/FS) (Docke t No. 1-91 - 1 1 2 8)

Limited Field Investigation (LFI) conducted by O'Brien &. Gere Engineers,Inc.Scope of Study completed by Fuss & O'Neill per CTDEP AdministrativeOrder No. 666.Landfill closure implemented. CTDEP revise permit//1 SW-0005-2L to addresswater quality monitoring plan.Facility ceases acceptance of waste for on-Site disposal.Engineer ing Ev aluation/Cost Analysis (EE/C A) addressi ng NTCRAcompleted.EPA enters into enforcement agreement with CTDEP; CTDEP enter intoConsent Order with RRDD#1 requiring RRDD/H to design and implementNTCRA.Landfill cover (2-ft thick) installed.CTDEP approves landfill closure.Remedial Investigation (RI) by O'Brien & Geire Engineers, Inc. (1996).Draft Remedial Action Plan (RAP).NTCRA completed; implementation of leachate collection system; capping, oflandfill and Site restoration,

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June 200 1September 28,

2001

November 1 9 ,2002

April 30 - May8, 2,003

May 8, 2003

June 2003

Feasibility Study Report, O'Brien & Gere Engineers, Inc. (200 la)EPA Record of Decision (ROD) (EPA, 200 l i b ) , and Preliminary C lose-OutReport

ELUR public notice; 30-day comment period from 1 1/19/02 to 12/19/02.

Sampling of Site groundw alter monitoring wells and ires idem ial potable waterwell s

Consent Decree Entered and Signed by US District Court for the District ofConnecticutSurface water and sediment sampling. Landfill Cap Inspection.

3.0 BACKGROUND

3.1 Physical Characteristics

The Site is comprised of a 97.8-acre parcel of land located on the northern slope of a hillwithin the Farmington River Valley, in the north central portion of Connecticut. The Siteis a semi-active waste disposal area located in the Towns of Barkhamsted and NewHart ford, L itch field County, Connecticut (a Site Location Map is provide as Figure 1).The ciapped landfill itself is approximately 13 acres. The Site is abutted to northeast by theBarkhamsted Town Garage facility acid in other directions by bot.li developed andundeveloped private properties. This includes resident ial properties to the east andsoutheast thai use private wells for potable waler. The town center of New Hartford lieswithin a one-mile radius 10 the south-southeast of the Site Other areas of the Site propertyinclude an active transfer station, recycling area, maintenance and office building, anddense woods comprised primarily of hardwood and conifer trees. A Site Location Map isprovided as Figure 1.

3,2 Land amid Resource Use

The Site was formerly used as a solid waste landfill wnl.li a chemical pit that received oilysludge with metal grindmgs and degreasers. Waste oil and batteries were handled forrecycling,. A NTCRA was initiated in .1.992 to cap the landfill, which slopped acceptingwaste for on-Site disposal in October 1993. In January 1998, the CTDEP approved thelandfill closure.

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The current use of the Site includes an,active waste transfer station, recycling area, with amaintenance and office building. The capped landfill is fenced. The current use for thesurrounding area is residential, commercial and recreational. The Metropolitan DistrictCommission (MDC) owns undeveloped land along the Farmington River, which is used forrecreational purposes, including fishing, swimming and boating

One surface water body, designated as the "Un-named Brook", originates south of the Siteand flow s along the western port ion of the land fill area. Beyond the landfill I , the brookproceeds to the northeast and flows undei Route 44 , where it enters the Farmington Riverfloodplain and a series of small beaver ponds The brook eventually flows into theFarmington River., located approximately 0.2,5 miles southeast of the Site. The FarmingtonRiver is a Class B River for recreational fishing and boating

The ground water aquifer underlying the Site is currently not used as a drinking watersource, but nearby commercial and residential areas use on-Site wells for potable waterGround water at the Site is estimated to flow to the northeast Down gradient of the Site,groundwalter flow is more easterly toward the Fanning!on River Groundwalter contourmaps for April 30, 2003 for the overburden and shallow bedrock are included as Figures 2and .3, respectively.

3.3 History olf Contamination

The Barkhamsted landfill was used for the disposal of solid waste between April 1974 andAugust 1988 The property is owned and operated by the Regional Refuse Disposal District#[ (RRDIMl) . RRDD/H is a corporate entity that was established on May 2.5, 1970 uponthe adoption of its charter by the Towns of Barkhamsted, Colebiook, New Hartford andWinchester. On September 21, 1972, RRDD41 received a permit from the State ofCTDEF approving the establishment of a solid wa&te disposal area. The Site beganoperating as a landfill in 1974.

After August 1988, the landfill was utilized only for the disposal of bulky and non-processible waste with the exception of a period during November and December 19.8.8when the Connecticut Resources Recovery Authority (CRRA) Mid-Connecticut Waste toEnergy Plant was inoperable. In 1998, .a landfill cap and leach ate collection system,surrounded by a fence, were constructed pursuant to a NTCRA under State authorityTable 1 provides a chronology of major environmental issues, events and milestones at theSite, as documented in the Remedial Investigation ( R l ) report (O'Brien & Gere Engineers,Inc., 1996) and Feasibility Study (FS) report (O'Brien & Gere Engineers , Inc. , 200la)

Historical wastes accepted at the landfill included the following

» Municipal solid waste;

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« Industrial wasl.es,, including metal grinding wasie, oily sludge with metal grinding anddegreasers; barrels containing unspecified amounts of chlorinated hydrocarbons andmethyl-ethyl-ketone ( M E K ) and keratin., and

• Dry metal grinding waste.

3L4 Initial Response

In 1981, EPA conducted a Site inspection, based on previous findings of the CTDEP.EPA's 1981 inspection included collection and analysis of Site groundwalter samples.Laboratory analytical results of Site groundwater indicated concentrations of xylenes,toluene, I , l-dichloroelhane (1,1 -OCA), 4-methyI-2-pentatnone and vinyl chloride (VC).EPA inspect ion report also indicated the presence of metals ai the Site (including, cadmium,chromium, copper, lead, manganese, nickel and zinc) attributed to the historical disposal ofoil y metal gri nd ing s luclges Addit ional ly, clur ing E PA' s inspect ion, leac hate was observedto be discharging from the landfill into the Un-named Brook. Pursuant to Section 105(8)(b)of CERCLA, the Site was proposed for inclusion on the National Priorities List (NPL) onJune 2 1 , 1988 and was subsequently listed on the NPL on October 5, 1989. Administrativeorders were issued by CTDEP (1990) and EPA (1991) to investigate waste materials anddisposal activities on the Site, along with the extent of impact to soil, groundwater andsu rface wa ter

In 1994, a NTC'RA was implemented at. the Site, which included re-location of impactedsoil and sediment to a paved portion of the Site, along with installation of a leac hatecollection system and landfill cap. The NTCRA was completed in 1998. A risk, assessmentwas prepared prior to NIC FLA implementation to assess post-NTCRA risks to human andecological receptors. Groundwater was deemed as the only medium requiring additionalitemed ial ion.

Subsurface investigations conducted from 1992 to 2000 are documented in the RI and FSreports. These investigations indicated the following:

« Soil sampling analytical results indicated concern rations of volatile organic compounds(VOCs), semivolat lie organic compounds (SVOCs), pesticides and poly chlorinatedbiphenyls (PCBs). Table 1 -1 of Ihe FS Report (O'Bnen& Gere Engineers, Inc., 200la)identifies contaminants of potential concern (COPCs), including VOCs, SVOCs andinorganics. Soils containing constituents detected at concentiations exceeding applicableor relevant and appropriate criteria were addressed in the NTCRA.

«• Surface water sampling and leachate seep sediment sampling results indicatedconcern rat ions of SVOCs, pesticides and PCHs. Sediment samples collected from

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hydrogeologically downgradient locations (to the landfill) and I each ate seep sedimentsamples indicated concentrations of VOC&, SVOCs, metals, pesticides and PCBs.

Prior to the R l , 31 ground water-monitoring wells were installed at the Site. Twenty-twoadditional wells were installed during; the Rl. COCs based on ground water investigationsinclude 14 VOCs, 4 SVOCs and 4 inorganics Ground-water sampling conducted since theRl have shown a decreasing trend in most contaminant concentrations, with the exceptionof toluene, which has increased in concentrations at two wells.

3.5 Biasis for Taking; Action

Hazardous substances, in concentrations above health-based levels, were identified during thejRl/FS. The Rl identified COCs that have been released at the Site in each media, which areidentified below and also in Table 2. EPA completed a baseline human health riskassessment in February 11996 and updated it in April 2000. Using, EPA's risk assessmentguidance, potential human health effects associated with exposure to COCs were estimatedfor various exposure scenarios Calculated risks for some exposure scenarios fell outsideEPA's acceptable range, 'which formed the basis, for the response actions. An ecological riskassessment conducted within the same time period determined that it was not likely that thecontaminants found at the Site would cause significant ecological impacts.

The COCs were selected from the constituents delected m groundwater based on theunacceptable risks that these contaminants present Groundwaler was the only medium thatposes an unacceptable post-NCTRA risk to human health. Since COCs have migrated inoverburden and bedrock groundwater, off-Site impacts are a concern, specifically to nearbypotable water supplies. As documented in EPA's Record of Decision (ROD) (EPA, 2001 b),the primary objective is restoration of Site groundwater by MNA, which has beendesignated as the final Site environmental remedy with an expected duration ofapproximately 16 years. Installation of additional groundwater monitoring wells may berequired to fill in data gaps and assess the performance of the MIMA. Prior to such wellinstallation, data from temporary sampling locations may be collected at the Site toproperly locale new wells.

The only medium that potentially poses an unacceptable post-NTCRA risk to theenvironment is sediment. Although the actual risk is uncertain, it is likely that decreasedleachate, biodegradation of organic contaminants, and natural sedimentation will amelioratethese possible risks. Surface waiter and sediment sampling is to be conducted to assess thispotential r i sk . Based on surface water sampling concluded in 2,000 (subsequent to theNTCRA), there axe no known constituents exceeding applicable criteria in surface water, asidentified in the ecological risk assessment presented in the FS. Leachate seeps areexpected to gradually diminish in discharge volume over time or dry up.

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COCs for groundwater, as addressed in the ROD., include the following:

AcetoneBenzene Toluene.1,2-dichloioethane 2-Butanone (MEK)1,2-dichloiopropane 4-methyl-2-pentanoneChloroethane 1,4-dichlorobenzeneChloroform Bis(2-ethyl hexyl) phthalateChloromethane 2,4-dimethylphenolDibromochloromethane 4-methyl phenolMethylene chloride AisenicTrichloroelhene (TCE) Chromiu m (total)Vinyl chloride (VC) LeadManganese Acetone

A complete list of the COC and other compounds analyzed is included in Table 2,

4.0 REMEDIAL ACTIONS

The following discusses initial plans,, implementation history and current status of theremedy.

4.1 Remedy Selection and Remedial Action Objectives

The ROD for the Site was signed on September 28, 2001 (EPA, 2001 b). MNA is theselected remedial option to reduce groundwater impacts at the Site. Remedial actionobjectives (RAOs) were developed to aid in the development and screening of alternatives.These RAOs were developed to mitigate and prevent, existing and future potential threats tohuman health and the environment. The RAOs for the selected remedy for the Site arebroken into two categories: groundwater and sediment..

Groundwater

The RAOs for groundwater for human health are as follows:

• Prevent ingestion or dermal contact, with groundwater having constituent concentrationsexceeding EPA Safe Drinking Water Act Maximum Contaminant Levels (MCLs), or intheir absence., the more stringent of an excess cancer risk of 1 x I0"(> for each substanceor a hazard quotient of I for each non-carcinogenic substance.

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» Restore groundwater beyond the compliance boundary (limits of the landfill) to IMCLsor any mote stringent CT Remediation Standards (background concentrations), or intheir absence, the more stringent of an excess cancer risk of 1 x 10"* for each substanceor a hazard quotient of 1 for each non-carcinogenic substance.

Sedimenj

The RAOs for sediment for environmental protection are as follows:

•• Protect benthic invertebrates and mammals ingesting, contaminated prey from directcontact with, or ingestion of, sediment hav ing constituent concentrations exceeding ahazard index of 1

» Prevent releases, of constituents from sediments that would result in surface water levelsexceeding federal Ambient Water Quality Criteria, Connecticut Water QualityStandards, or in their absence, a hazard index of 1

"1.1.1 Source Control

The source control was addressed by the NTCRA, which included re-local ion of impactedsoil and sediment to a paved portion of the Site, along with installation of a leachatecollection system and landfill cap. During the performance of the NTCRA, an approximate340-foot reach of the Un-named Brook was relocated on the west side of the landfill, withthe former section of the brook being covered with soil. Moreover, sediments wereexcavated from an approximately 70-foot reach of the brook and placed beneath the capduring the NTCRA construction. The EPA has determined that the landfil l cap controlscontaminant sources and that no additional actions beyond operation and maintenance of thecap are anticipated during implementation of the final cleanup remedy ( M N A , institutionalcontrols)

4. 1L ,2 Management olE IVI igration

The major components of the management of migration remedy selected in the RODincludes:

• Long-lerm monitoring of gioundwaler, surface water (including seeps), and sediment,

• Restoration of contaminated groundwater via natural attenuation,

• Environmental land use restrictions (ELURs) (Institutional Controls),

• Public education piogra.ni, and

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«• Five-year reviews.

4.2 Remedy Inn pkraenrlal ion

In 1992 landfill closure was implemented in accordance with the Landfill Closure Plan(Fuss & O'Neill, 1992,). In January 1995 the C'TDEF approves Line land fill 1 closure. InApril 1997, the Remedial Action Planfoi the NC'TRA was prepared, which included(O'Bnen&Gere Engineers, Inc., 1997)

« Relocation of impacted soil, sediment and refuse to within the limits of the area to becapped;

« Installation of a leachale collection system, with a 15,000-gallon underground leachateholding tank,

• Capping of the landfill with a low-permeability capping system;

«• Rel oca) ion o f the U n-named Br ook;

« Vertical extension of groundwatei monitoring wells located within the limits of thecapped area and abandonment of monitoring wells no longer being used;

«• Site restoration;

«« Installation o f perimete r secur ity fencing;

« Institutional controls for protection of the landfill cap.

In January 1998 the NTCRA was completed Since then, community involvement activitieswere conducted. In June 2001 the Feasibility Study (F,S) was completed (O'Brien & GereEngineers, Inc., 200la). On September 28, '2001, the ROD was signed, which selectedMNA as the remedy (EPA, ZOOlb). A Consent Decree was signed by the PRPs on variousdates between September and November 2002 and by government representatives betweenSeptember 2002 and January 2003, which was entered by the court on May 8, 2003 (UnitedStates v. Regional Refuse District No. I , et a I . , 2003)

Pursuant to the terms of the Consent Decree, RRDWl is performing the RA In the springof 2003, RRDD/H initiated the long-term monitoring of groundwater. Periodic monitoring,data continues to be collected in support of restoration of contaminated groundwater viamonitored natural attenuation.

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M'NA remedy provides for both source control and management of groundwater migration.The approximate clean up time frames for the selected remedy is 16 years to reachgroundwalter cleanup levels. Statutory 5-year reviews will be conducted as long as waste isin place.

4.3 System Operations/Operation aind Maintenance (O&M)

RRDDtf 1 is conducting the long-term monitoring and maintenance activities at the Site.There are two components to the long-term monitoring and maintenance activities: a.)Source Control, b.) Monitored Natural Attenuation of Groundw ate r. For the sourcecontrol, a landfill post-closure Operation and Maintenance Manual (OMM) was completedin October 2001 (O'Bnen& Gere Engineers, Inc , 200Ib). O&M activities include thef ol lowing:

«• Routine inspection and maintenance of constructed features, including the landfill cap,gas venting system, leachate collection and storage system, surface water runofffac ihf ies, the m-stream sedimentation bas in, acce ss roads, groundw ate r mon itoringsystem and physical Site security;

» Mowing of the cap;

» Performance of a Long,-term monitoring program including, ground water, surface water(including seeps) and sediment;

• Response to alarm and unforeseen circumstances;

« Coordination of leachate removal and disposal; and

» Evaluation of O&M and monitoring activities and identification of proposed changes tothe OMM; or Site procedures/policies that would provide a safer and/or more cost-effective operal ion.

Visual Site monitoring of the landfill occurs on a routine basis to evaluate evidence oferosion; cap differential settlement; the condition of the perimeter fencing, gales, locks andsigns; condition of gas monitoring probes; drainage structures and surrounding properlystructures. The existing groundwatei monitoring wells and immediate surrounding area isreviewed during each sampling event.

To date, the Source Control O&M activities have been ongoing since the capping of thelandfill. The MM A sampling activities were initiated in April and May of 2003 with thefi rst quarterly samp lung event.

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With regard to O&M costs,, the following is an approximation of total annual systemoperations/O&M costs duiing the period until submission of the next five-year review inSeptember 2008. This cost estimate is different from the cost estimate of the .ROD as itincluded the estimated maintenance cost for (he cap, leachate disposal, and reporting lo theCTDEP in addition to the ROD estimated cost. The ROD cost estimate addressed only thesampling and monitoring, insta Illation of new wells, with reporting to the EPA.

Table 3:

DatesFrom To5/03 .5/045/04 5/055/0.5 5/065/06 5/075/07 5/08

Total Cost Estimate rounded to nearest $ 1 ,,000

$408,000$374,000$204,000$140,000$150,000

S.O PROGRESS SINCE THE LAST FIVE-YEAR REVIEW

This is the first five-year review for the Site.

6.0 FIVE-YEAR REVIEW PROCESS

Tasks completed as part of this review include review of pertinent Site-related documents;an inspection of Site monitoring areas; discussions with RRDD#1, EPA., CTDEP and thecommunity; and a review of Site-specific regulatory and relevant standards. The Sitereview was led by Byron Man, the RPM for the EPA, with support from Gilbert Richardsof the CTDEP. Sampling and Analysis and technical support was lead by Allen Walker ofLFR, the project manager for the PRP group, and included LFR team members withexpertise in hydrogeology, MIMA, and risk assessment.

6.11 Commnimilv Nolification and Involvement

As documented in the ROD, the level of community concern and involvement has varied.Since completion of the NTCRA, community interest has been minimal. Provided below isa chronology of public outreach efforts that have occurred since 1998.

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Marc hi 1998

March 1999

March 2000

Week of June21, 2001

Prior to weekof June 21,

2001June 20,

2001 to July20, 2001June 20,

'2001

July 18, 2001

November19, 2002

EPA publishes a fact sheet and holds a public information meeting to describeupcoming construction activity and schedules for the NTCRA landfill work. EPAcommunity involvement staff canvasses the local residents, going door to doorprior to the public meeting.EPA publishes a fact sheet to provide an update of Site coast ruction activitycompleted to dale and the schedule for activity during 1999.EPA publishes a fact sheet to describe the alternatives being evaluated in the FSand l.o describe the nine CERCLA criteria and the public participation process tofollow the FS.EPA publishes a notice and brief ana lys is of the Proposed Plan in The RegisterCitizen and makes the plan available to the public at the repository - BeardsleyMemorial LibraryEPA community involvement staff canva sses the local residents, going door todoor prior to the public meeting.

EPA holds a 30-day public comment period to accept public comment on thealternatives presented in the FS and the Proposed Plan and on any other documentspreviously released to the public.EPA holds an informational meeting to discuss the results of the RJ and the cleanupalternatives presented in the FS and to present the EPA's Proposed Plan to abroader community audience than those that had already been involved at the Site.At this meeting, representatives from EPA and CTDEP answered questions fromthe public.EPA holds a public hearing to discuss the Proposed Plan and to accept any oralcomments .E L U R public notice; 30-day comment period from November 19, 2002 toDecember 19, 2002

On June 17, 2003 a public notice was published in the Register Citizen to announce thefive-year review, Site activities, and a June 24, 2003 public open house A letter stalingthe same was provided to the local community's chief municipal officers. EPA also sentout a press release regarding the five-year review and other updates to the Site activities.There were no comments received with regards to the protectiveness of the remedy.

6. 2 Doc uimenilt Revi ew

Site-related documents reviewed as part of this effort are listed in Table 4were compared lo six aspects of the Site including'

The documents

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» Basis for the Response Act ion;

« Implementation of the Response;

«• Operation and Maintenance;

« Remedy Performance;

«• Legal Documental ion; and

« Community Involvement.

6.3 Data Review

Ground water monitoring pursuant to the ROD was initiated in April and May of 2003.Therefore, only one round of sampling had been conducted at the lime of the five-yearreview, which included the initial sampling for MNA parameters.

Table 5 presents the results of the first round of ground water sampling at the Site. The(able compares the data to applicable state and federal criteria. The data includes VOCs,SVOCs, metals, leachate parameters and the MNA parameters. As this is the firstcomprehensive sampling event, these results establish the baseline for the MNA sampling.The evaluation of the MNA parameters is further discussed in Section 7 of this report.

Based on the analytical results, LFR prepared figures of the COC concentration fordetected COCs. The following figures were prepared:

• Figure 4: Overburden Total VOCs and SVOCs Concentration Map - April 30 - May 8,2003;

« Figure .5: Overburden Total BTEX Concentration Map - April 30 - May 8, 2003;

« Figure 6: Shallow Bedrock: Total VOCs and SVOCs Concentration Map - April 30 -May 8, 2003; and

« Figure 7: Shallow Bedrock Tola! BTEX Concentration Map - April 30 - May 8, 2003.

A review of these figures indicates that the delineation of the likely plume endpoinl to theeast was estimated. To more clearly define the extent of the COCs, LFR recommends thatexisting additional wells be sampled in future sampling events. The proposed wells to besampled include wells MW-105S and B, MW-108S and B, MW-109B, MW-117S and B,and M W - 1 1 8 S a n d B .

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The initial round of surf ace waiter and sediment sampling occurred on August 14, 200.3.The results of this sampling were not available for inclusion in this repor t .

6.4 Sile Inspeclion

A Site inspection was conducted during each the initial sampling event in April and May2003 as well as on June 24, 2.003. EPA and CTDEP performed the Site inspection. Thusreview focused on the condition of the groundwater monitoring wells and their usability forsampling,. In addition, a Site review was conducted with Byron Mali of the EPA and GilRichards of the CTDEP on April 30, 2003.

During the review with the EPA and CTDEP, representatives an off-Site well location] (wellMW- I I I ) was reviewed and four 55-gallon drums were found at the well head This wellis located in the woods accessible by a dirt road that is blocked at its entrance. The drumswere labeled as purge water, but the label was weathered and appealed old. Two of thedrums contained liquid and the others did not The drums were in poor condition as theywere rusted with some holes. It was suspected that these drums contained purge waterfrom the initial sampling during the RI or FS. LFR sampled the drums for VOCs andmetals. No VOCs were detected and the metals detected were consistent with purge water.Based on these results, the drums were removed by the RRDDt f l with the water placed inthe leachate holding lank for disposal

Regarding the well conditions, three of the wells were unable to be sampled. This includedwell MW-1131, MW-113D and MW-4R. The&e wells were damaged as (billows:

« MW-1131: the PVC was bent so that sampling equipment could not pass;

« M W -113 D a pump was stuc k in the well; and

n MW-4R: there was an obstruction at 12 feet below grade.

Tlie condition of the cap and fence appeared good at the time of the visit.

The landfill cap is also checked by an independent inspector as part of the source controlrequirements. The latest inspection was June 5, 2003 No significant issues wereidentified dur ing this inspection. A copy of the inspection checklist is included asAppendix A.

6.5 Interviews

Interviews were conducted with various parties connected to the Site. Carol Jones,, anearby resident, was interviewed on April 30, 2003 No significant problems regarding the

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Site were identified during the interview. There were no concerns expressed about theprotectiveness of the remedy. She expressed a historical concern about slormwater runoff'from the Site to her property, but this was corrected with Site grading. She also expressedthat adequate prior notice to sampling be provided

Jim Hart, the administrator for the Site, did not indicate significant problems regarding theSite. He inquired if it was possible to reuse the leachale water collected in the holdingLank, which would be used to water the grass on the landfill cap. To further review thispossibility, LFR collected a sample of the leach ate water for Laboratory analysis andcharacterization. The potential reuse of this water is, being evaluated.

7 TECHNICAL ASSESSME NT

7., I Is itlhi'C JRemecly functioning as intended by (he decision documents?

The review of documents, Applicable, or Relevant, and Appropriate Requirements(ARARs), risk assumptions, and the results of the Site inspection indicate that the remedyis functioning, as intended by the ROD. A copy of the ARARs for the Site is attached atAppendix B. The capping, of land fill material and collection of leachale have achieved theremedial objectives to minimize the migration of containinants to groundwalter and surfacewater and prevent direct contact with, or ingest ion of, contaminants in soil and sediments.The forthcoming implementation of institutional controls will prevent exposure tocontaminated la nd fill maler ial s.

O&M of the cap and drainage structures has been effective. O&M annual costs areconsistent with original estimates and there are no indications of any difficulties with there medy

There were no opportunities for system optimization observed during, this review. Themonitoring well network provides sufficient data to assess the general progress of naturalattenuation within the plume, and maintenance of the cap is sufficient to maintain itsintegrity. To better assess the magnitude and extent of the ground water plumedowngiadient of the landfill, additional monitoring locations are planned that includesamp ling existing monitoring wells and the installation of new monitoring wells.

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The institutional controls that are in place (the main facility) include prohibitions on the useor disturbance of groundwalei until cleanup levels, are achieved, and prohibitions onexcavation activities, disturbance of the cap, and any other activities or actions that mightinterfere with the implemented remedy. The institutional controls that are about to berecorded (Town Property, MDC, and a private property owner) will also have the sameprohibitions. These institutional controls, in the form of an ELUR, have been submitted toCT'DEP for approval. No activities were observed that would have violated theinstitutional controls. The cap and the surrounding, area were undisturbed, and no new usesof si, round water were observed. The fence around the Site is intact and in good repair.EPA and CT'DEP inspected the Cap on June 24, 2003.

7.2 Are the exposure assumptions, toricity data, cleanup levels and remedial actionobjectives (RAOs) uisecl alt the time oil' remedy selection si ill valid'!

7.2.11 Changes in Exposure Pathways

The exposure pathways as indicated in the risk assessment and ROD are shown Figure 8.There have been no changes in the physical conditions of the Site since approval of thedecision documents. Therefore, no changes in exposure pathways have occurred thatwould affect the protectiveness of the remedy.

7.2.2 Changes in To&icily, ARAJRs, aod Other Contaminant Characteristics

Changes in toxicity

Since approval of the decision documents, the EPA or other authority has revised toxicityfactors for some of the chemicals of concern. Sources of toxic ity factors that werereviewed included EPA's Integrated Risk Information System (IRJS), EPA Health EffectsSummary Tables (HEAST), and repents by the EPA National Center for EnvironmentalAssessment (MCE A). Tables 6 summarize the previous and currently applicable toxic ityfactors for COCs that are carcinogens and non-caicinogens, respectively The EPA-approved cancer slope factor for benzene has increased by a factor of less thai) two. TheE PA -approved cancer slope factor for vinyl chloride has decreased by about 26 percent.Increases m cancer slope factor indicate a greater potential for carcinogenic action Inaddition, the iSfCEA has proposed an increased cancer slope factor for trichloroethylene,which is currently under review by EPA. The proposed slope factor for TCE is 36 timesgreater than before. The r i sk assessment concluded that that 80 percent of the totalestimated carcinogenic risk from groundwater exposure was due to arsenic. The agency-recognized toxic ity of arsenic has not changed since approval of the decision documents.

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Benzene, tr ic 111 o roe thy lie ne, and v inyl chloride contributed I , 0.1, and 9 percent to the lota)estimated incremental excess cancer risk. From exposure to groundwater, respectively

The EPA-approved reference dose for manganese has increased by a factor of less than six.The EPA-approved reference dose for benzene has decreased by about 7.5 times.Decreases in reference doses indicate a greater potential for non-carcinogenic effect Inaddition., the NCEA has proposed a decreased reference dose for triehloroethene, which iscurrently under review by EPA. The proposed reference dose for TCE is 20 times lessthan before. Conversely, the EPA-approved reference dose for manganese has increased byabout 60 times The reference doses for three chemicals (1,2-dichloroethane, 1,2-dichloropropane, and chloroethane) have been withdrawn from EPA's IRIS database,pending further review by EPA. The risk assessment concluded that. 91 percent of the totalestimated non-carcinogenic risk from ground water exposure was from 4-methylphenol.The age ncy -rec ognized loxiciry of 4-methylphenol has not changed since approval of thedecision documents Benzene, trichloroethylene, and manganese contributed 0.05 percent,0.0006 percent, and 3 percent to the total estimated me re mental excess cancer risk frome x posure to grou nd wa ter

Based on a review of these changes intoxicity factors , the overall estimated cancer andnon-cancer Site risks, as estimated in die risk assessment, are unlikely to be significantlyaffected Moreover, the changes in toxicity factors are unlikely to affect groundwatercleanup levels at the Site. Currently,, the most stringent cleanup levels for groundwater (asindicated in the ROD) are dictated by background concentrations for each chemical ofconcern., rather than by total estimated health risk

Changes in ARARs, Standards and To Be ConsM&rad'>s

Cleanup levels were established in the ROD for groundwater for all chemicals of concernidentified in the Baseline Risk Assessment found to pose an unacceptable r i sk to eitherpublic health or the environment Cleanup levels were set based on the ARARs (e.g. , non-zero Drinking Water Maximum Contaminant Level Goals (MCLGs), MCLs, and morestringent State Remediation Standard Regulations), as available. Groundwater cleanuplevels, (breach chemical of concern is its background concentration, per Connecticut RSRs,Section 22a-l33k-3(a) A list of tentative background concentrations was presented in theROD. During the Remedial Action Phase, EPA in consultation with CTDEP, willdetermine whether these concentrations represent background for this. Site. EPA will onlychange these values in the ROD if they are necessary pursuant to Section 117(c) ofCERCLA. A process often re (erred to as an Explanation of Significant Differences

There is one change that has occurred in the ARARs and To Be Considereds (TBCs) sincethe ROD was signed. Since the ROD was signed, EPA adopted lower Maximum

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Concent ration Level (MCL) standards for arsenic in groundwater. This changed the standardfrom SO ppb to 10 ppb.

The interim gioundwater cleanup level, as presented in the ROD, was based on the arsenicstandard in drinking water of 50 ug/1 established in 1975, by the U S. Public Health Servicestandard originally established in 1942, The Safe Drinking Water Act, as amended in 1996,required EPA to review current drinking water standards, for arsenic, propose a maximumcontaminant level (MCL) for arsenic by January 1. 2000, and issue a final regulation byJanuary, 2001.

EPA published a new standard for arsenic in drinking water of 10 ug/1 on January 22, 2001that would require public water supplies to reduce arsenic lo 10 ug/1 by 2006 EPA withdrewthis standard in March 2001 for review. On May 22, 2001 EPA extended the previous delayof the rale's effective date to February 22, 2002 but did not change the compliance date(2006) for systems.

EPA requested three independent., expert panels to conduct Ihree studies as part of itsreassessment of (he January 22 rule; the National Research Council undertook an expeditedreview of EPA's arsenic risk analysis and recent health effects research, the NationalDrinking Water Advisory Council reassessed the rule's cost, and the Agency's ScienceAdvisory Board reviewed its benefits.

The risks, cost, and benefits reviews are completed. EPA decided that the additionalinformation has reinforced the basis for s ign i f i can t reductions of the standard. On October31, 2001 , EPA affirmed the appropriateness of an MCL or regulatory level of 10 ug/1 forarsenic in drinking water in its press release. As required by the Sa fe Drinking Water Act, astandard of 10 ug/1 protects public health based on the best available science and ensures thatthe cost of the standard is achievable, This arsenic drinking water rule became effective onFebruary 22, 2002 and by January 23, 2006, both community water systems and non-transient, non-community water systems must comply with the new 10 ug/1 standard.Additionally, Superfund must also adopt this new standard and treat it as it would any otherMCL-based contaminant concentration level in its decision making process for ground waterc leanups

Therefore, the arsenic cleanup level must be reviewed and a determination made as towhether the remedy remains protective in light of the revised cleanup goals. The ROD's goalof die an ing up arsenic to drinking water levels is unl ike ly to be met in l ight of (a) the revisedMCL for arsenic (10 ppb), and (b) the current lack of viable cleanup technology for arsenic ingroundwater. However, risks to human health can be controlled as long as the groundwaterin the immediate vicinity of the contaminated portions of the Site is not used for drinkingwater.

All other risk based cleanup goals as presented in the ROD remain substantively unchanged

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l i r s t F i v e Year Res/if u Rrpoit 1or th< H<uHijm<trcl Neu IHI.irilcird landtill()ILi 17 (H

Pdgp .!c> of t ?

7.2.3 I-, vpectecI Pr<»<.;ress I«»tanh ]V|eeting R A(h

(mnindhsateir modelling conducted dluriri" (he 1 S ( < ) BIK.II & ( i e i e 1 11 a infers Inc. JOOla'iesiirn iied lhal nalmal attenuation would ich iese the .11 oimdsxaler cleanup l e s e l s in theoseibmden in appiMAiinateK 1 !> 6 years and in the hcdioek iqmlei in appiioMinatek 6\eats I hcsc 11. suits s \e ie obtained by snnul.itin.' the llos\ of <.rionndv iler and themigration and a t tenua t ion o f t s v o COC s 4-meths Iplienol diid "'-hulanone. Since tliesecompounds ueir present in high concentrai ions in the plume ,ind die fairh, '-oluble in\\citei. the ckanup 11nics icir tlicsc1 c<>mp(muds icpiesei 11 ion-i'i \,ili\ e estimiates ol thet ime for remediation ol ,ill !.;round\v Elite t ('()( s ILised on c . i l i bunion lo tiends in I lit:!.:iouiiid \\ater inoiiitoiinj! data tlnougli the \U 1 S period I .n i l s Inah i . i te - , of contain inanldegradation \ \ e ie piojected h\ the model calihial ion Ho^eve i due to the imceilaintiesl hat art1 associated \\ith L'ontaminanl transpoil mode liny. I he pn. dirtcd ckMiinp tunesmust be i onsidered est imates Uriceilaintu;- in tin. model predielions a i o -e Irorn llieinahiht; lo Annulate comple>vi l ie^ in the a<| inlei plume s\s tern and the l imi ted \\ ilerc|ualit\ data loir cahhration.

Fie\ ions levies ol lnstoi leal aroundwaln (|i i i ihtv data indicated thai the conec'iitratioiisof S i te- ie la ted l const i tL ients a r e either remaimiv. i e l a t i \ e U stable or a re dt'crea-,iiu; o\erlime tieoeheinical PS u lei ice that indicated ~,ubsniluce condil i^ns aie amenable formiitiobialh -mediated degradation included the fo l low my

« an ahunddiiee ol dissolved organic e.irlx 11 lhat i an he used a- a e at hoi i -.ource(e lec t ron donoi I hs mnerohes.

« anaerobh condit ions that '-ustain rediMn e dechlonnation:

« p ie- .enve of oiyunie compounds that can undeiijo fermentation ic iction-. I B 1 1 >sketone's) th il pitodlice hs droaen. s\hieh t in be utih/ed b^ inicinbci dininsj i cd i i c t i sedee hloi inal ion:

« los\ coiieenlralion- oil nitrate that \ \ i l l no t suppress the i e d u e t i \ e deebloiinationpatluv i \

« li) s\ - ul f, it e e u ncei it i a t ions w it hi n t he pi u me ac- e oni p u e< I t i) ha t k.' i o LI nd, si ii.rs.re si in t:ulilli/.ition as an t: ec t ion aceeptor:

« sonic decree of increased chloride eonecnt iat ion in the plume lompaicd lohaek;.' ioii i i<l iiiu^eNtin;.; dechlonnalion is oeuaiini;.;

• some dec ree ci met eased alkalinity in the plume eoinpaied to bai ki' iound siuujestinjjlhal i he plume is bioloi^icalK act i \e :

• d e e i e d s c s in oxidat ion-reduct ion potential in llie plume <is umip.ued it1 ba( ktiiound.u; the plume i-, biologicalls aelne

Page 30: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Fi rs t Five-Year Rpviuu Report loi the Barl<h,ims1ert-New H<irVlnrd I anrllill()M 1 7 0 Ji

Pdgp SO o f I/

« the p iesenee of i n e l l u n e t h a t suggesls h i . > h K n-diium. condit ions and i i n e i o b i a ldegradat ion, and

• y r o u n d w a l e r pi I r a n g e s t h a t are sui table lo i n n c i o h i a l popu la t ions .

Reconth. a long- tenm imnindwater-moni tor ing p u > i 2 i a i m \ \ a s i n i t i a t e d t h a t is designed toassess the p i o i z i e s s of n a t u r a l a t t enua t ion o v e r l i m e . 1 he r e s u l t s 1'ioin the f i r s t round oft h i s m o n i t o r i n g program are shown in Table :;. Based on a p r e l i m i n a r y re\ iew ol t h i srecent data. Si te-related consti tuents con tmiu . io i j m a i n r e l a t i v e ! ) stable. 01 arcdec leasing o v e r l ime . Isoconc en trail ion c o n t o u i p l r h roi to ta l VOCs and SVOC s and to ta lare slunsn in I inures -I th rough 7. Addi t iona l i n t e r p r e l . i t i o n of these da ta , i n e l n d i n i ' amore de ta i l ed e \ a l u ; i l i o n ol progiess towards meet ing RAOs. MI i l l occur in fu tu re pe i iodkreport s. i nc lud n ig f u t u i c fi \ e.-yea r Rev iev, s.

7,3 Other information that could call into question the pr«(ecti \cncss of the reineih

T h e r e is no o t h e r mlonna l ion that ca l l s into q u c - t i o n the p i o l e c t i \ e n e s s ol ihe reined; . .

7 4 Technical] Assessment Summary

I he re\ i e \ \ of documents . AKARs , r isk a s s u m p l i o n - ^ , and t h e r e su l t s of t h e Si teinspect ion ind ica te t h a t the remedy is f u n e t i u n u u ; as in tended b\ the ROI) I l i e exposureassumpt ions c l e a n u p leu-Is, and remedial ac t ion nh | eu i \ e s ( K A < ) ' - ) used at the t ime ofn e r n e d ; se lec i ion i c n i a i n s t i l l v a l i d . Some ehan i . e s in L ige i i e \ - recog in /ed t o x i e i t x facto i shave occurred foi selected Si te - re la ted e l ie rn ic . i l - , , hu t t hese changes h a v e n < > t affectedcleanup le \e ls . 1101 a i e the \ expected to s i g m l k a n t U a H V e t o x e r a l l Site r i s k , i o n g - l e t mm o n i t o r i n g data i n d i c a t e that grounckvalei p l u m e i - r e l a t i \ e l \ s table o r s h r i n k i n g , and t h a iacceptable progress is being made towards met . t ing R \< )s.

8 IS SI KS

As of I he dale ol th is v\ r u l i n g , there have been no p i o b l e m s 01 issues encountered d u r i n gs a m p l i n g , o ther t h a n the i n a b i l i t y t o collect s a m p l e s f iom t h i e e Site t M o m i d \ \ a t e rm o n i t o r i n g w e l l s ( V l \ \ ' - l 131. M\V- I I3D. V1\V - 4 R ) due to damage and o r obst i u c l i o n sIhese v s e l l s a i e not c r i t i c a l to assess the p e r l o i n u n c e of VINA at the S i t e and there is no

current p l a n io icpiaee them.

Page 31: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

f i r s t Five-Year R e v i e w R i> |>ot l toi the fi,irkhamsleri-\< v\ HartlorJ lancllill09/1 710]

Page 31 of J2

I he o thc i i ssue enconi i le ied d u r i n g groin id\v ate i ' - ampl ing in A p r i l and Ma> 2003included the disco UT) of tour 55-gal lon d i u n i 1 - a t v \ e l l M \ A - 1 1 1 . h\o of the drums \ \ercrusted and e m p i \ . 1 he o the r l\\o drums c o n t a i n e d approx imate I) 2 to 20 gallons o I 'purge\ s n t e r based on t h e l a b e l on the drums. No \ i s t i a l or ol fat ton ev idence of OHM ( O i l / 'hazardous mate r ia l 1 - ) was encountered w i t h i n 01 in the aiea su r round ing ihe d rums .Samples \ \ e ic co l lec ted Irorn each drum and a n a l \ / c d foi VOCs and me ta l s . (' I DEI' v\aspresent du r ing s a m p l i n g a c t i v i t i e s . No VOC s uere detected and t h e rne ta l s delected s \erec o n s i s t e n t \v i lh purge \ \ a te r . Rased on these l e s u i i s . ihe drums \ \ e r e removed b\ theK K L ' H ) \ \ i th the water placed in the leachate-ho d ins ' l a n k tor disposal.

Ne i the r ol the issues set forth above affect the n i o i e c t i \ e n e s - , of the remeeh

9 RECOMMENDATIONS AND FOLLOW-HP ACTIONS

R e i e r t o Table X f o r a l i s t i n g of recommendations and l b l l o \ \ - u p a c t i o n s .

I n PR OT EC Til V EN KS S SI ATEiVI ENT

T h i s f i \ ( ; • • •>ear r e v i e w has found that the reined} U f n i i L t i o m n j i as designed. Theimmedia te t in eats to human health and the ens i r o n n i c n l have been addressed b\ cappingthe l a n d f i l l I lie selected g r o u n d w a t c r remedy is VI\ \ . Once the u r o i m d v v a t e r c leanupgoals ha \e been j c h i e \ e d . in approximately l < > > e a r s (-,ee O ' l i r i e n A: Gere r .ngmeeis. Inc? ( )01a ) . t h e groundsater remedy w i l l be p i o t e c i i v e of h u m a n hea l th and ihe en\ i ronment .In the i n t e r i m , exposure pa thways that cou ld t e s u l t in unacceptable l i s k s a re beingc o n t r o l l e d . Lin i r o n m e n t a l Land Use Res i r i e t i ons ( r 1 I Rs). \ \ h i c h p roh ib i t thei n s t a l l a t i o n o l ' d r i n k i n g \ \ a te r wel ls , have been placed on t h e ma in f a c i l i l ) p roper ty

I I NEXT R E V I E W

The due date foi t h e second five-year re\ ie\s i ~ . September 1:5, 200X.

Page 32: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

F u s t rive-Year Revieu Rrporl l o t t h i 1 Ba rkha i r rMec l \eu H a r t l r o r c ) l a n d f i l lf ) ' L > 1 7 0 !

P.)E;e Mat \1

K F f E R E N C E S

I uss & O ' lNe i l l I 992 RRDILW L a n d f i l l Closure P lan . Bark hammed ( I . Sep tember

("I Bnen & Gere I lunneers. Inc . 1996. R e m e d i a l l n \ eMhja t ion ( R l I - B a r k l i n m s i e d - N e uHartford L.indfil l Superfund Site I ebuiarx.

() Rnen & deic I i iuiineers. I n c . 1997. R e m e d i a l " a c t i o n I ' l a n ioi Non-l i n i e Cmlu-a lRemova l At. l i o n . Ha rkha rns l ed -Ne \ \ Han lord I and Ti l I Super! i n id Site

O 'Br i en & deie I n u i n c u r s . 1m.. 200la. I c a i i h i h u S i u d \ - H a i k h a m s t t . d - N e \ v I lar l io idL a n d l l l l S i iper luruJ Site. June.

( ) ' l ! i i e n & deirc Liunneers. Inc . 2001h. Opera t ion and M a i n t e n a n c e n i a n i i i i l - B a r k h , m i s l e dLandf i l l I I 'lie ac- ant V a l l e y . Conneiliait 1 a n d l i l l ( losure. Oetoher

Slale ol (. on net. t i i . nl Deparlment o f F n \ i i o n m e n t a l P r o l f e l i o n 1 ' > L H ) Consent Ordeif lSRD-072 h e t \ \ e e n the State o f ( o n n c e t i c u t and the Regional Rt;HLb,e DisposalDis l r ie t No. 1

U n i t e d Mate-, f n\ i r o n i n e n i a l Protection A i j e n e \ (I i S. I I ' \.) l ( J ( i | A d n i i n i s t r a t i v e < ) ideron Consen t Doekcr ^ l - c ) 1 -1 128 hetueen tin. I 'A . t he Slate of ( o m i e ' c t i e u tand ihe 1PKI ' droup. Ocloher 4.

United Sta le- , I m i r o i m i e n t a l Protection A u e t K > (1 ' S. 1 \'\) J U d l a . C o n r i p i e h e r i M v e F m.-~\ ear R e \ i e \ \ ( J i i i d a n c e . June.

U n i t e d S ta les I m i r o n m e i H u l Protection 'V.'enn (1 ] S I l ' \ ) ? 0 0 l b f PA Su pen f u n dR c ' c u t L l o fDee i ' - ion : Barkhamsied N e \ \ H a i l l o i d l a n d f i l l . I PA I I ) :C M :>'-'Ki) 712 ? J 5. ( ) l ' 1 . Bark! lam st L-d ( ' I 1 P \ Ol) R i ) 1 -01 / O l ) 1. Sopl c n iher2S

I Inik'd Slates ol A m e n e d and State of Connecl iu i l v R e g i o n a l Refuif Disposal [ ) i - , t i i uNo. I . et a I "10f)~\ Consent Deeiee. U S I ) i s t n e t (, ourl foi t h e Dis lne i ofConnee t ien l . \ l i i j 7 .

Page 33: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

TABLES

Page 34: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

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Page 35: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

TABLE 2: CONTAMINANTS OF CONCERN AND OTHER TARGET ANALYTES______

IVIediiiiirni/Matriix: Leachale and Groundwater

A l k a l i n i t yAmmoniaChemical OxygenDemandSpecific Conduct i \ i t jHardness (Meta l s )pHTotal SulfateChlorideN itrateTotal Dissolved SolidsTotal Suspended Solids

1VI ed iu m/Matrix: Sed i rne nt

Be nzo( a (anthraceneBe nzo( b)fluoranlheneBenzo(a)pyreneIndeno( 1,2.3 -cd)pyrenePhenanlhrenePyreneCobaltCopperIron

Arochlor-1254Gamma-chlordane4, 4'-DDL4, 4'-DDTEndosulfan I IEndrinLeadManganeseNickel

A l u m i n u mAnt imon>Arsen i cBariumBeryl l iumChromiumVanadiumZinc

Medium/Matrix: Leachale Seeps/Surface Water

Chloromelhane1,2-DichloropropaneAcetoneCarbon disulfideMethylene chlorideXylenes

PhenolChlorobenzene1,1 ,-DichloiroethaneHardness (Metals)Arochlor-1254

Benzene Arsen icBromodichloromethane A lurn inurnCh loroetha ne BariumChloroform Copper2,4-Dimethylphenol IronBis(2- Cadmiumethy]hexyl)phthalateLead ZincManganese CopperZinc Chromium4 , 4 '-DDE: 4.4'-DDT

Page 36: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

TABLE4 - REVIEW OF SITE RELATED DOCUMENTSBasis lor Response Aclioirt

Remedy decision documents, and rederal and State laws and regulations, provide the basis upon whichthe remedy was selected or modif ied. The documents in the table below ident i fy the background andgoals of the remedy and changes in laws and regulations that ma) affecl the remedy.

DOCUMENT

Remedial Investigation ( R l )Barkhamsted-New HartfordLandf i l l Supeirfund SiteO'Brien & Gere Engineers, Inc .February 1996

Feasibility Stud)' (FS) ReportBarkhamst ed-New Hart lordLand fi 11 Supeirfund S it eO'Brien & Gere Engineers, Inc .J u n e 2001

PURPOSE OFDOCUMENT

Records assessment fi nd ings.

Reviews various remedialalternatives and ends inse lection of remedial action

1LJ SE D U RING FIVE-YEARREVIEW

Understanding of site conditi ons.Risk assessment.

Selec t ion of remedial action.Backgrou nd in form ationCommunity concerns.Risk assessment.

EPA Super fund Record ofDecision (ROD)Barkhamsted-New Hart lordLandf i l lU .S. En v ironmental Protect ionAgency (U.S. EPA)September 28, 2001

Records, remedial decision. Backgrou nd in form ation.Goals for the remedyBasis for action.Cornmunity concerns.

Federal environmental laws andregulations.

Statutory and regulatoryrequirements.

Changes in standards identified asARARs in the ROD that providesa basis for cleanuple vel s/pirol ect iveness of theremedy.

State environmental laws andregulations.

Statutory and regulatoryrequirements.

More stringent stateenvironmental laws andregulations.

Page 37: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

][irnip]lenrienltal:ioi[i of the Response

Inn p ie mentat ion documents furnish information about design assumption;, , design plans or modifications,and documentation of the completion of con struct ion at operable units (OUs) and the Site.

DOCUMENT PURPOSE OFDOCUMENT

USE DURING FIVE-YEARREVIEW

Remedial Inves t iga t ion (RI)Bark ham sted- Ne\v Hartford[.and fi l l I Superfund SiteO'Brien & Gere Engineers. Inc.February 1996

Records assessmentf indings

I Inderstanding of site conditions.History and status of remedialaction.

Feasibil i ty Study (FS) ReportBark ham sted-Ne \\ I lart fordLandf i l l Superfund SiteO'Brien & Gere Engineers, Inc.June 2001

Reviews various remedia la l te rna t ives and ends inselection of remedial aclion.

Selection of remedial actionBackgroun d i n form ationHistory and status of remedialact ion.

EPA Superfund Record ofDecision (ROD)Bark ham sted-Ne w Hart fordL a n d f i l lU.S. Envi ronmenta l ProtectionAgency (U.S. EPA)September 2 8 , 2 0 0 1

Record- , remedial decision Backgroun d i n form ationGoals for the remedyBasis for act ion.Corn muni ty concerns.

Operation and MaintenanceManua lBark ham sled L a n d f i l lO 'Br ien & Gere Engineers, Inc.October 2001

I d e n t i f y O&M activities allandf i l l and long-termgrou nd\va1er monitor! ngprogram.

Long- term groundwater m on itoringrequirements.Background in format ion.Construction and designinformation.

Page 38: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Remedy Per Form a nee

Moni to r ing data progress reports, and performance eva lua t ion reports provide information that can beused lo determine whether the remedial ad ion continues 1o operate and funct ion as designed, and hasachieved, or is expected to achieve cleanup levels . The dala presented in these documents can alsoprovide trend analysis, which can be used lo determine how \ \ e l l Ihe remedy is performing and how longit may take to achieve remediation goals These reports can also i n d i c a t e whe the r moni tor ing act iv i t ies , areadequate to ensure the effectiveness of I h e remedy and whether these ac t iv i t i e s are being conducted

DOCUMENT PURPOSE OFDOCUMENT

USEDURJNGFTVR-YEARREVIEW

Operation and MaintenanceM a n u a lBark ham sted Landfi l l IO'Brien & Gere Engineers,Inc .October 2001

Ident i fy O&M activities atl a n d f i l l and long-termground water moni Coringprogram.

L ong -te r rn groundwate rrn on i1 oring requirements.Backgroun d i n form al ion

Quarterly and AnnualMoni to r ing reportsF U . S & O'Neil l I. Inc.A n n u a l l y to 2003

Results of CTDEP long-termmonitoring program.Trend anal)sis.

Check \ \helherCOC arew i t h i n es tabl ished criteriaEvaluate progress of cleanupTrend analysis for COCs, butno MNA data.

Quarterly rn on it oring dataLFR, IncA p r i l l -May 2003(to be published in futureQuarterly and AnnualMoni to r ing reports)

Results of CTDEP andUSEPA long-term m o n i t o r i n gprogram.Trend analysis.

Check whe the r COC arcw i t h i n established cri ter iaEvaluate progress, of cleanupTrend anal)s is for COCs, withMNA. data.

Page 39: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Ope ration and Mainte nance

O&M documents describe the ongoing measures at the Site to en MI re the remedy remains protectiveThey provide the structure for the O&M at the Site and confirm that O&M is proceeding as planned.

DOCUMENT PURPOSE OFDOCUMENT

USE DURING FIVE-YEARREVIEW

Operation and MaintenanceManualBarkhamsted LandfillO'Brien & Gere Engineers,Inc (2001 a)

I d e n t i f y O&M activi t ies atlandfil l and long-termgro u nd\v at er m on itoringprogram

L on g-te rm groundwalermonitoring requirementsBackground informal ion.

Quarterly and Annua lMonitoring reportsFUSS& O'Neill, Inc.A n n u a l l y to 2003

Resul ts of CTDEP long- t e rmmonitoring program.Document O&M activi t ies anddata.

Check whether COC arewithin established criteria andno u n u s u a l trend:,.Confirm act ivi t ies areconducted and identify issues

Legal Documentation

Legal documentat ion pert inent to the Site may specify r e spons ib i l i t i e s for conducting remedia l actions.implement ing i n s t i t u t i o n a l and access control:,, O&M a c t i v i t i e s and performing elements of the five-yearreviews

DOCUMENT

Consent DecreeFinal ized May 7. 200.?

PURPOSE OFDOCUMENT

Corn mitme nts/agreementsrega rd ing implementati on andoperation of the remedy andconduct of studies,.

USE DURING FIVE- Y E A RREVIEW

Responsibilities of t h e PRP forc onduc t ing remedia 1 ac tiv itiesat the Site

Page 40: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Co mm uini ty Invol veme nl

The community involvement p l a n (CIP) w i l l provide a better unders tanding of the h is tory of c o m m u n i t yi n v o l v e m e n t and of other ac t iv i t ies at the Site It wi l l also help to identify communit> members who maybe useful resources during interviews.

DOCUMENT

Feasibility Study (FS) ReportBark h am sted-New Hart (birdLandf i l l Superfund SiteO 'Br ien & Gere Engineers,Inc.June 2001

PURPOSE OFDOCUMENT

Reviews various remedialalternatives and ends inselection of remedial ac t ion

US E DURING FIV E-Y EARREVIEW

Background informationCommunity concerns.

EPA Superfund Record ofDecision (ROD)Barkhamsteel-New HartfordLandfillU.S. Env ironmental Protect ionAgency (U.S. EPA)September 28, 2001

Records remedial decision. Background i n fo rmat ion .Corn muni ty concerns.

Communi ty Involvement PlanDraft 200 3

Site communication strategythat specifies outreachactivities.

Community concerns/issuesand identif ication ofappropriate corn muni tymembers for interviews.

Page 41: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

TABLE 5 - GROUNDWATER ANALYTICAL RESULTS

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Page 139: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Table 6Changes in Cancer Toxieitj Data

Pathway: Ingestion, Dermal

Chemical of Concern

A i seme

1 ,4 dichlorobr n7?n?

Benzene

1.2-dichlnroethane

1 . 2 - dichloropropane

Chin rue thane

Chloroform

Chloromelhane

Dib romoc h 1 or o -methane

Methylene chloride

TiiLhluioethene

Oral Cancer

Slope Factor

in ROD

1 :»

024

029

091

068

0029

006 L

01 3

084

0075

Oil

Current

Applicable

Oral Cancer

Slope Factor

same

same

0.055

same

samp

samp

same

same

same

same

0.4

Slope Factor

Un i t s

[(mg/kg),\l.i\

1

|[(rng/kg)/d,u

]

[ (mg/kg) 'd .n

1

[ (mg/kg) /d ,H-

1

[ (mg/kg) /d , iv

1

[(mg/kg)/dr,v

1

[ (mg/kg) /d ,^

1

[ ( rng/kgj /d ,^

1

[ (mg/kg) /da \

1

[ (mg/kg) /da>

1

[(mg/kg)/dd\

I

Weight of

Evidenrp/Canre

r Guideline

Description

A

C

A

B2

B 2

B.2

B 2

C

C

B?

Bl

Source

IRIS

HE AST

IRIS

IRIS

HE /VST

MCE A

IRIS

HE AST

IRIS

IRIS

MCE A

Date

(MM^DD/YY)

06/09/03

FY '97

06/09/OJ

06/09/0}

FY '97

07/12/99

06/09/0:.

FY '97

06/09/03

06/09/OT

8/01/01

Page 140: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Vinyl chloride

Bis(2 -ethyl he,<>l) phihdlile

1.9

.O'u

1.4

B2

IRIS Ob/09/03

I R I S Ob/09/03

Key

Changes since Record of Decision shown in boldface

- No information .available

IRIS: Integrated Risk Information System, U S. EPA

HEAST. Health Effects Assessment Summary Tables

NCEA: National Center for Environmental Assessment

USEPA GROUP:

A -• Human Carcinogen

B2 - Probable human carcinogen - Indicates

sufficient ev idence in animals and inadequate or

no evidence in humans

C- Possible human carcinogen

Summary of Toxicity AssessmentThis table provides carcinogenic risk information thai is relevant to the contaimnai its of concern in groundwater. At the time of writing

the risk assessment, slope factors were not available for the dermal route of exposure Thus, the dermal slope factors used in the

assessment were extrapolated from oral values An adjustment factor is sometimes applied, and is dependent upon how well the

chemical is absorbed via the oral route. Adjus tments are particularly important lor Chemicals with less than 50% absorption via the

ingestion route. However, adjustment is not necessary for the chemicals evaluated at this. Site. Therefore, the same values presented

above v, ere used as the dermal carcinogenic slope factors lor these contaminants

Page 141: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Table 7Changes in Non-Cancer Toxic ity Data

Pathway: Ingest ion, Dermal

Chemical of Concern

.arsenic

chromium

manganese

acetone

benzene

2-biitanone

1.2-dichloroethane

1 2-dichloroptopane

diloroeihane

chloroform

Dibromochloromethane

4-methj l-2-pentanone

rnethj lent: chloride

loluene

IniJhlorocthene

bis(2-cth\lhe\yl)-

phthalate

Oral RfDValue iri

ROD

0 0003

0 003

(CirVl i

0.024

0.1

0 003

0 6

0 U3

0.001 1

0 4

001

0 02

0 08

0 06

02

0 006

0 02

CurrentApplicableOral RfD

Value

same

same

0. 1 4

same

0.000-1

sainv

in one

in one

in one

sam e

sarrif

same

same

saint:

.000.!

same

Oral RfDUnits

rng-kg/day

mg-kg/day

ing- kg/day

mg-kg/day

mg-kg/day

nig- kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

mg-kg/day

PrimaryTargetOrgan

Skin

....

( \ S

I IUT, K id IKS

Developmental

--

-

1 p. ei

Kuln<:>

1 i\ er ktdin'v

1 i\ur

l_ i \ ei'Ividne;,

1 i\ ei 'kid ne)

Liver

CombinedUncertainty'Modify ing

Factors

3

900

1

1000

300

5000

....

--

1 000

1 000

3000

100

1000

3000

1 000

Source

IRIS

IRIS

IRIS

IRIS

IRI S

IRIS

IRI S

IRIS

NCEA

IRIS

IRIS

HEAST

IRIS

IRIS

NCEA

IRIS

Date(MM/DD/YY)

06/09/03

06/09/03

06/09/03

06/09/03

06/09/03

06.09/0.)

06/09/03

06/09/0.)

07/12/99

06/09/0 3

06/09/03

FY '97

06/09/03

06/09/03

08/01/01

06/09/0 3

Page 142: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

1.4-dichlorobai/cne

2 .4-d imethy lphenol

4-mt: th\ lphenol

0.03

0 02

0 005

.....

same

same

Key:

Changes suite Record oi Decision shown in boldface

- No inlormation available

IRIS: In tegra ted Risk Informahon System, U S. EPA

HEAST. Health Effects Assessment Summary Tables

NCEA National Center for Environmental Assessment

Su mmary of Toxicity Assessment

mg-kg/day

mg-kg/day

mg-kg/day

....

Blood 3000

CNS 1000

US EPA GROUP:

A - Human Carcinogen

IRIS 06'09'()i

I R I S 06'09/01

HEAST l"> •<"

132 • ProhiMe human carcinogen - Indicates sufficient

evidence in animals .and inadequate or no evidence in humans.

C - PosMhle h uman ca rcmogen

This table provides rion-carcinogenjc risk information that is relevant to the tonl aminants oi concern in grounctwater Al I of the COCs

have loxicity data, indicating their potential for adversi nonorclnogenic health el reels in humans All RID's arc based on chronic to\icit>

Dermal RfD values used in the risk assessment were extrapolated from oral values

Page 143: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

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Page 144: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

APPENDIX A

Landfill 1 1 inspection Check! 1st

Page 145: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

: Five-Year_Review_Site Inspection Checklist

I._SmyNFORMAT_lONSite Name: Barkhamsted Landfill Date of Inspection:

^o^^^^^^^^^^^^^^^AWrCTD^^^^^^^^2_Agency, office, or company leading the Weather/temperature:five-year review: EPA-Region IRemedy Includes (Check all that apply)LJ Landfill cover/containment [_J Monitored Natural AttenuationLJ Access Controls LJ Ground water containmentLJ Institutional Controls LJ Vertical Barrier WallsLJ Ground water pump and treatment |__J OtherLJ Surface water collection.and treat meritAttachments: [_] Inspection team roster j_| Site Map

O ir%j ""i"1 itr 1C?1 ii/1 icr ILK/CI! i'i"'i'"ijp>piif riiin \t \^\*i\t ri nn iin^» JLil L JC-fJCIk T J.ICLr f " O' I Vi.,'J Ivl-J». icHUl 1 IJLdl.1 <tl IJ'Lrll f /

I . O&M Site Manager(Name) (Title) (Date)

Interviewed at site [J[ At office [_| By phone Tel No.Problems, suggestions; [_J Repor t attached

r^&ivfsiteitafr_J_Name) (Title) JDate)_ _

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

(Name) (Title) (Date) (Phone No.)Problems; suggestions; | J Report attached

AgencyContact

(Name) (Title)Problems: suggestions; [_] Report attached

AgencyContact

(Name) (Title)Problems; suggestions; [_] Report attached

AgencyContact

( Name) (Ti tie )Problems; suggestions; [J| Report attached

(Date) (Phone No.)

(Date) (Phone No.)

(Date) (Phone No . )

Page 1 of 17

Page 146: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Appendix_A: Five-Yea r_Reyjew Site Inspection Checklist

4 Other Interviews (optional) [ J Report attached.

Page 2 of 17

Page 147: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

LLS]w-Yeaj[JR^

'EDOCU^^^^^^^^^^^^^^^^^^^^)^^1. O&M DocumentsD O&M Manual ' LJlieadli'iy Available""!!"] Up to Date [If N/ALJ As-built drawings [J Readily Available |__J Up to Date [_J N/ALJ Maintenance Logs LJ Readily Available LJ Up to Date [_J N/ARemarks:

2. Site-Specific Health and Safety [_J Readily Available ( J Up to Date [ | N/APlanContingency Plan /.Emergency LJ Readily Available LJ Up to Date [_J N/AResponse PlanRemarks:

3. O&ivii and! OSHAlYaining" n^eadliy~Avaiiabie~~n U ploDate [JN/A"RecordsRemarks:

4. Permits and Service AgreementsLJ Air Discharge Permit |[ ] Readily Available LJ Up to Date [_J N/AG Effluent Discharge [ ] Readily Available [J Up to Date [J N/AI] Waste Disposal, POTW [ ] Readily Available LJ Up to Date [J N/ALJ Other permits [ ] Readily Available [_] Up to Date [_j N/ARemarks:

5. Gas Generation Records [J Readily Available [_J Up to Date LJ N/ARemarks:

6. Settlement Monument Records [J Readily Available j_j Up to Date [J N/ARemarks:

7. Groundwater Monitoring Records [J Readily Available j_] Up to Dale [J N/ARemarks:

8. Leach ate Extraction Records [_] Readily Available [J Up to Dale |_J N/ARemarks:

9. Discharge Compliance Records LJ Readily Available LJ Up to Date |_] N/ALJ Air G Readily Available [J] Up to Dale G N/AII] Water (effluent) ["] Readily Available G Up to Date G N/ARemarks:

10. Daily Access/Security Logs |..J Readily Available [_| Up to Date LJ N/ARemarks:

Page 3 of 17

Page 148: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Apj>endix_A:_Fiye:YeajI_Revjeyv Stl e II nspecl ion Chec Id isl

Page 4 of 17

Page 149: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Ajp>fiendix.A:_Five:YearjteYiew_Site Inspection Checklist

IV. O&M COSTS1. O&M OrganizationLJ Stale in-house [j Contractor For StateD PRP in-house [j Contrac tor For PRPLJ Federal Facility in-house [_] Contractor For Federal FacilityIII Other

2. O&M Cosl RecordsLJ Readily Available [_] Up to dateLJ Funding mechanism/agreement in placeOriginal O&M cost estimate [_] Breakdown attached

Total annual cost by year for review period if avai lableFrom . _ _ To |_J Breakdown attached

(Date) (Date) (Total Cost)From _ To LJ Breakdown attached

(Date) (Date) (Total Cost)From To LJ Breakdown attached

(Date) (Date) (Total Cost)From To LJ Breakdown attached

(Date) (Date) (Total Cost)From To [_J Breakdown attached

(Dale) (Date) (Total Cost)

3. Unanticipated or Unusually High O&M Costs During Review PeriodDescribe costs and reasons:

y._ACCESSj\NDJWSTrnJTTp^AI^ONTROLS [I] Applicable [I] N /AA. FencingI . Fencing damaged ] [_] Location shown on site map [ [_] Gales secured f |_] N/ARe marks

B. Other Access Restrictions2. Signs and other security measures j [_J Location shown on site map f [_] N/ARe marks

Page 5 of 17

Page 150: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

AE^endix_ALlJYe^YeaHRevlew_Site

C. Institutional Controls (1C)1. Implementation and enforcement:Site conditions imply ICs not properly implemented |_J Yes |_J No |_J N/ASite conditions imply ICs being fully enforced |_J Yes |_J No |_J N/A

Type of monitoring (e.g., self-reporting, drive-by)FrequencyResponsible party/agencyContact

(Name) (Title) (Date) (Tel No.)Reporting is up-to-date |_J Yes |_J No |_J N/AReports are verified by the lead agency [_] Yes |_J No |._J N/ASpecific requirements in deed or decision documents [_J Yes [_] No |_J N/Ahave been metViolations have been reported [_] Yes [_J No |_J N/AOther problems or suggestions: [_] Report, attached

2. Adequacy |_J ICs are adequate |_] ICs are inadequate |_J N/ARemarks

ID, GeneralI . Vandalism/trespassing [_J Location shown on site [_J No vandalism evident

mapRemarks:

2. Land use changes on site |_l N/ARemarks:

3. Land use changes off site |_] N/ARemarks:.

VI. GENERAL SITE CONDITIONSAJRoads G Applicable Q N/A_1. Roads damaged |_J Location shown on site map |_J Roads Adequate (_J N/ARemarks:

B. Other Site ConditionsRemarks:

Page 6 of 17

Page 151: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Aj>Dendix_Ar J^e_iYear_Bev]ew_Site Jnispeclion Check.!|sj

A. Landfill Surface1 . Selelement (Low spots) |J Location shown on sile [_| Settlement not evident

mapA real Extent Depth

Remarks:

2 Cracks |J Location shown on she LJCracking not evidentmap

Lengths Widths DepthsRemarks:

3. Erosion [_] Location shown on site LJErosion not evidentmap

A real Extent Depth

Remarks:

4 Holes |_J Location shown on site [_JHoles not evidentmap

A real Extent Depth

Remarks:

5 Vegetative Cover [_] Grass [_| Cover properly established [_| No signs of stressLJ Trees/Shrubs (indicate size and locations on a d iagram)Remarks:

6 Alternative Cover (armored rock., concrete, etc.) [J| Applicable [J N/ARemarks:

7 Bulges LJ Location shown on site LjBulges not evidentmap

Area! .Extent Height

Remarks:

8 Wet Areas/Water |_jWet Areas/water damage not evidentDamageLJ Wet Areas |_J Location shown on site map Areal ExtentLJ Ponding (_J Location shown on site map Areal ExtentLJ Seeps LJ Location shown on site map Areal ExtentLJ Soft subgrade LJ Location shown on site map Areal Extent

Page 7 of 17

Page 152: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Apj>emlix_A: Fi ve-Year_Review_Site Inspect ion CJieckJisit

Remarks

9 Slope rnstabilily [_] Slides [_| Location shown on sile [jNo evidence ofmap slope ins tabi l i ty

Areal Extent:Re marks:

Page 8 of 17

Page 153: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

B. Benches Q, Applicable [~] N/A(Horizontally constructed mounds of earth placed across a steep landfill side slope tointerrupt the slope in order to slow clown the velocity of surface runoff and intercept andconvey the runoff to a lined channel.)1. Flows Bypass Bench |_J Location shown on site [_]N/A or okay

mapRemarks:

2. Bench Breached [_J Location shown on site [_JN/A or okaymap

Remarks:

3. Bench Overtopped |_J Location shown on site [_JN/A or okaymap

Remarks:

C. Letdown Channels [_f Applicable |_J N/A(Channel lined with erosion control mats, riprap, grout bags, or gabions that descend downthe steep side slope of the cover and will allow the runoff water collected by the benches tomove off the landfill cover without creating erosion gullies.)1 . Settlement [_J Location shown on site map LjNo evidence of settlementAreal extent DepthRemarks:

2. Material Degradation |_] Location shown on site LjN'o evidence of degradationmap

Areal extent DepthRemarks:

3. Erosion |_j Location shown on site |_J~No evidence of erosionmap

Areal extent. DepthRemarks:

4. Undercutting (_J Location shown on site (_JNo evidence ofmap undercutting

Areal extent DepthRemarks:

5. Obstructions Type [_|No obstructions[_] Location shown on site map Areal extentRemarks:

6. Excessive Vegetative Growth Type

Page 9 of 17

Page 154: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Appendix A: Five^Year Review Sit e Inspectipn_C heck list

LJ No evidence of excessive growthLJ Vegetation in channels does not obstruct flowLJ Location shown on site map Areal extentR ema rk s

Page 10 of 17

Page 155: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Appendix.^: |"ive^

D. Cover Penet rations [_| Applicable j J N/A.l . G a s V e n l s • |_J Active [ ] PassiveLJ Properly [J|Functioning [ ]Koutinely sampled [J, GoodSecured/Loc ked condii ionLJ Evidence of leaking at penetration LJ Needs maintenance [J| N'/ARemarks:

2. Gas Monitoring ProbesLJ Properly LJ Functioning [jRoutinely sampled [J GoodSecured/Loc ked condit ionLJ Evidence of leaking at penetration [_JNeeds maintenance [J N'/ARemarks:

3. Monitoring Wells (wi thin surface of landfill)LJ Properly LJ Functioning [JRoutinely sampled [J GoodSecured/Loc ked condit ionLJ Evidence of leaking at penetration [_JNeeds maintenance [J N'/ARemarks:

4. Leachate E?(.tracl:iont WellsLJ Properly [_JFunctioning [jRoutinely sampled [J Good.Secured/Locked conditionLJ Evidence of leaking at penetration |_jNeeds maintenance |_J N'/ARemarks:

5. Settlement MonumentsLJ Located |__J Routinely sampled [J N'/ARemarks:

E. Gas Collection and Treatment_QAp£licable LJ N/A.1 . Gas Treatment Facil ities

[ | Flaring | JThermal destruction (_JCollection for reuseLJ Good condition [J'Needs maintenanceRemarks:

2. Gas Collection Wells, Manifolds and PipingLJ Good condition [J'Needs maintenanceRemarks:

3. Gas Monitoring Facilities (e.g., gas; monitoring of adjacent homes or buildings)LJ Good condition |_J Needs inaiiitenan.ee [J N/ARemarks;

Page 11 of 17

Page 156: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Appendix__A:; _Fiye-Year_Reyje\v_Site Inspection Checklist

F. Cover Drainage Layer (_] Applicable |_j N/A1 . Outlet Pipes Inspected [J FunctioningRemarks:

LJ N/A

2. Outlet Rock Inspected [_J Functioning;Remarks:

LJ N/A

G. Detention/Sediment Ponds [_| Applicable LJ1 . Sill alien A real Extent DepthRemarks:

LJ S illation not evident

2. ErosionRemarks:

A real Extent Depth

3. Outlet Works |_J Functioning [J N/ARemarks:

4 Dam [_] Functioning [J N/ARe marks :

[_] Erosion not evident

][-i. Retaining Walls LJ Applicable LJ N/A1. Deformations [J Location shown on site (_J Deformation not evident

mapHorizontal displaceme nt Vertica 1 di spl ace meritRol ational displ acementRe marks :

I. Perimeter Ditches/Off-Site Discharge [J| Applicable (_] N/A1 . Siltation | ] Location shown on site | ] S illation not evident

mapAreal extent DepthRe marks:

2. Vegetative Growth [_j Location shown on sitemap

LJ Vegetation does not impede flowAreal extent TypeRemarks

|_j N/A.

3. Erosion

Areal extentRemarks:

(...! Location shown on sitemap

Type

[_j N/A.

Page 12 of 17

Page 157: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Appendix A: Five-Year_Rev|e\v_Site [nspecj[on .Checklist

A. Discharge Structure [J Functioning |_J N/ARemarks:

Page 13 of 17

Page 158: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

VIILVERTICALBAR^WALLS_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _1 . Settlement [J| Location shown on site [_] Settlement not evident

mapArea! extent TypeRemarks:

2. Performance Monitoring Type of monitoringLJ Performance not monitored FrequencyLJ Evidence of breaching Head differentia]Remarks:

.JGJ!:0I ^A. Groumjwater Extraction Wells, Pumps and Pipelines |_J Applicable [J N/A1 . Pumps, Wellhead Plumbing and ElectricalD Good D All required wells D Needs D N/Acondition properly operating maintenanceRemarks:

2. Extraction System Pipelines, 'Valves, Valve Boxes, and Other AppurtenancesLJ Good condition [_]Needs maintenanceRemarks:

3. Spare Parts and Equipment(_J Readily LJ Good condition (_JJRequires LJ Needs to beAvailable Upgrade providedRemarks:

B. Surface Water Collection Structures, Pumps and Piipej ines (_] Applicable [_] N/A1 . Collection Structures, Pumps and ElectricalLJ Good condition [_JNeeds maintenanceRemarks:

2. Surface Water Collection System Pipelines, Valves, Valve Boxes, and OtherAppurtenancesLJ Good condition [_JNeeds maintenanceRemarks:

3. Spare Parts and EquipmentLJ Readily LJ Good condition [.jRequires [_J Needs to beAvai lable Upgrade providedRemarks:

Page 14 of 17

Page 159: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Inspection_CheckIlst

_£._ Treatment System j[I] Applicable [II N/A1. Treatment Train (Check components that apply)|_J Metals Removal [_j Oil/water separation [ J BioremediationLJ Air stripping [ J Carbon, adsorbersII] FiltersLJ .Additive (e.g., chelation agent, flocculent)II] OthersLJ Good condition LJ Needs maintenanceLJ Sampling ports properly marked and functionalLJ Sampling/maintenance log displayed and up to dateLJ Equipment properly identifiedQuantity of groundwater treated annuallyQuantity of surface water treated annuallyRemarks:

2. Electrical Enclosures and Panels (properly rated and functional)LJ N/A LJ Good condition [_j Needs maintenanceRemarks:

3. Tanks., Vaults, Storage VesselsLJ N/A LJ Good condition |_JProper Secondary LJ Needs maintenance

containment'Remarks:

4. Discharge Structures and AppurtenancesLJ N/A LJ Good condition LJ Needs maintenanceRemarks:

5. Treatment Building(s)LJ N/A [..J Good condition (esp. roof and doorways LJ Needs repairLJ Chemicals and equipment properly storedRemarks:

6. Monitoring Wells (pump and treat remedy)LJ Properly [_] Functioning LJ Routinely sampled [_| Good conditionsecured/lockedLJ All required wells located [_]Needs maintenance LJ N/ARemarks:

Page IS of 17

Page 160: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

D, Monitoring Data1. Monitoring DataLJ Is routinely submitted on time [_|ls of acceptable quali ty2. Monitoring Data Suggests:LJ Groundwater plume is effectively [_]Contaminant concentrations are decliningcontainedRemarks:

E. Monitoring Natural Attenuajion (MNA)I . Monitoring Wells (MNA remedy)LJ Properly LJ Functioning [_|Routinely sampled LJ Good conditionsecured/lockedLJ All required wells located LJNeeds maintenance [_] N'/ARemarks;

X. OTHER REMEDIESIf there are remedies applied at the site which are not. covered above, attach an inspectionsheet describing the physical nature and condition of any facility associated with theremedy. An example would be soil vapor extraction.

Describe issues and observations relating to whether the remedy is effective andfunctioning 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.).

Page 16 of 17

Page 161: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

Appendix. A: Five -_Year_Review_Site Inspect ion Chec kl 1st

JL_Adeguacj/_ofp&M_Describe issues and observations related to the implementation and scope of the O&Mprocedures. In particular, discuss their relationship to the c u r r e n t and long-termprotective ness of the remedy

Page 17 of 17

Page 162: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

APPENDIX B

Applicable or Relevant and Appropriate Requirements (ARARs)

Page 163: S upedu nd Fiec^rd s C enter SITE: OTHERTracey A. Costa, CHMM -Senior Sta ff Scientist, LFR LFR Review Period : 1 /S/98-9/ 1 7/03 Pafte(s) oif Site Inspection : Type of Review: X Post-

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