Kenton Landfill QUI Kenton, DE - DNREC Alpha Plans...1.0 INTRODUCTION The Kenton Landfill (site) consists of approximately 98 acres and is located 1.5 miles south of Kenton, Delaware

PROPOSED PLAN OF REMEDIAL ACTION

Kenton Landfill QUI Kenton DE

DNREC Project No DE-0108

April 2003

Delaware Department of Natural Resources and Environmental Control Division of Air and Waste Management Site Investigation amp Restoration Branch

391 Lukens Drive New Castle Delaware 19720

TABLE OF CONTENTS

10 INTRODUCTION 1

20 SITE DESCRIPfION AND HISTORY bull 2

21 SITE SETTING 2 22 SITE AND PROJECT HISTORY 2

30 INVESTIGATION RESULTSIFEASIBILITY STUDy 3

40 REMEDIAL ACTION OBJECTIVES 4

60 PlJBLIC PARTICIPATION 6

LIST OF FIGURES

FIGURE 1 SITE LOCATION MAP 9

FIGURE 2 SITE LOCATION MAP SHOWING OU1 AND OU2 10

FIGURE 3 SITE PLAN SHOWING MONITORING WElL LoCATIONS 11

LIST OF APPENDICIES

APPENDIX A Remedial Investigation Laboratory Data Summary Tables

10 INTRODUCTION

The Kenton Landfill (site) consists of approximately 98 acres and is located 15 miles south of Kenton Delaware The site is located 1300 feet north of the intersection of Delaware Route 11 and Shorts Comer Road or Road 169 (Figure 1) Route 11 immediately borders the site to the south and west and wooded open space to the north and east A small trailer park is located to the south beyond several hundred yards of forested land The site is divided into two sections by a railroad right-of-way The western portion is approximately 45 acres in size and was designated as Operable Unit 1 (OUl) during the initial investigations with the remaining 53 acres in the eastern portion designated as OUZo

The site owner the Delaware Department of Transportation (DeIDOT) entered into the Voluntary Cleanup Program (VCP) under the provisions of the Delaware Hazardous Substance Cleanup Act 7 Del C Chapter 91 (HSCA) as administered by the Delaware Department of Natural Resources and Environmental Control-Site Investigation and Restoration Branch (DNREC) Through a VCP Agreement DelDOT agreed to investigate the potential risks posed to the public health welfare and the environment at the site

A facility evaluation (FE) conducted by DNREC and completed in 1994 identified low concentrations of metals pesticides and volatile organic compounds (VOCs) in on-site soils and elevated concentrations of several metals and organic solvents in shallow groundwater Based upon the results of the FE a RI was recommended

In 1995 an additional environmental investigation was conducted on behalf of DelDOT by EA Engineering Inc (EA) the scope of which concentrated on the groundwater medium Additional wells were installed and slug tests were performed to better characterize the groundwater flow direction and rate Based upon the results of these investigations DelDOT entered into the VCP and contracted Tetra Tech Inc (Tetra Tech) of Christiana Delaware to perform a remedial investigation (RI) of the site

This document is the Departments proposed plan of remedial action (proposed plan) for the site It is based on the results of the previous investigations performed at the site This proposed plan is issued under the provisions of the HSCA and the Regulations Governing Hazardous Substance Cleanup (Regulations) It presents the Departments assessment of the potential health and environmental risks posed by the site

As described in Section 12 of the Regulations DNREC will provide notice to the public and an opportunity for the public to comment on the proposed plan At the comment periods conclusion DNREC will review and consider all of the comments received and will then issue a final plan of remedial action (final plan) The final plan will designate the selected remedy for the site All previous investigations of the site the proposed plan the comments received from the public DNRECs responses to those comments and the final plan will constitute the remedial decision record for the site

Section 20 presents a summary of the site description and history Section 30 provides a description of the RI results Section 40 presents a discussion of the remedial action objectives Section 50 presents the proposed plan Section 60 discusses public participation requirements

1

20 SITEDESCRIPTION AND HISTORY

21 Site Setting

The site consists of approximately 98 acres and is located 15 miles south of Kenton Delaware The site is located 1300 feet north of the intersection of Delaware Route 11 and Shorts Corner Road (Road 169) Route 11 immediately borders the site to the south and west and wooded open land to the north and east A small trailer park is located to the south beyond several hundred yards of forested land (Figure 2)

The site is divided into two sections known as operable units by a railroad right-of-way The western portion is approximately 45 acres in size and was designated as OUI during the initial investigations with the eastern portion designated as OU2 Access by vehicle is limited in OUI by a locked cable barrier onto the only dirt pathroad into the landfill Pedestrian access is not restricted A fence with two gates surrounds a portion of OU2

22 Site and Project History

DelDOT operated the site as a sand and gravel borrow pit from 1951 until 1964 after which DelDOT disposed of road debris and tree clippings on OUL During that time it has been confirmed that local residents disposed of various domestic refuse into the pit It is also suspected that illegal dumping of industrial waste may also have taken place Dumping activities were curtailed in the late 1960s In 1969 DelDOT leased OU2 to Kent County which erected a transfer station in 1979 that was operated by the Delaware Solid Waste Authority

As part of a FE conducted by DNREC in 1994 soil and groundwater samples were collected from seven test pits and four newly installed monitoring wells (MW-l through MW-4) A follow-up investigation by EA on behalf of DelDOT was performed in 1995 which involved the collection of soil and groundwater samples from three new wells (MW-5 through MW-7) The results of these investigations confirmed the presence of both domestic and industrial waste in OUI Soil samples contained low concentrations of VOCs metals and pesticides Groundwater samples from a number of the monitoring wells contained elevated concentrations of vinyl chloride 12-dichloroethene (DCE) and trichloroethene (TCE) above their respective EPA Maximum Contaminant Levels (MCLs) for Drinking Water The EA investigation also conducted slug tests on six wells in order to assess the characteristics of the shallow Columbia Aquifer A rare-species information search requested by EA and conducted by DNRECs Division of Fish and Wildlife identified the presence of two rare Delaware plants within the OUI site boundaries both located in shallow wetlands near Route 11

As a consequence of these investigations DNREC contacted DelDOT who entered into a VCP Agreement to perform a RI at the Kenton Landfill OUI site The purpose of the RI was to 1) assess potential contaminant exposure to nearby residents and potential future construction workers 2) delineate the extent of the groundwater contaminant plume 3) identify and assess potential impacts to nearby surface water bodies 4) assess potential impacts of the site on rare and endangered species and 5) investigate the potential for the migration of contaminants in surface soils such that the migration of contaminants does not cause a violation of state and federal water quality standards for surface water bodies

2

30 INVESTIGATION RESULTSIFEASIBILITYSTUDY

Concentrations of dissolved VOCs in particular DCE (up to 310 microgramsliter (ugL) in MW-3) TCE (up to 67 ugL in MW-3) and vinyl chloride (up to 170 ugL in MW-3) were detected in groundwater samples above their Delaware Uniform Risk-Based Standards (URS) of 5 JLgll 5 JLgL and 2 JLgL respectively Concentrations of dissolved metals were all below their URS for groundwater except aluminum iron and manganese However standards for these three metals are based upon aesthetic not health based concerns

Analytical and field screening data indicate that low concentrations of VOCs semivolatile organic compounds (SVOCs) pesticides and PCBs remain in on-site soils below remediation standards with no hot spot areas identified Concentrations of several metals including copper nickel and thallium were slightly elevated above site-specific background values but did not exceed any URS values Complete analytical results from the RI are presented in table format in Appendix A

No VOCs semivolatile organic compounds (SVOCs) pesticides or PCBs were detected in surface water samples Elevated concentrations of eleven metals particularly iron (up to 94300 IlglL URS of 1000 1lgL) and manganese (up to 11300 1lgL lJRS of 80 1lgL) were detected at levels above their respective URS values for the protection of the environment and above the levels from an upstream background sampling location Concentrations of dissolved metals appeared to increase at locations adjacent and downstream from the landfill indicating potential site impacts Subsequently an ecological assessment of the stream was conducted to evaluate the potential impact that the elevated metals in surface water may have on the benthic macroinvertebrates within the stream The ecological assessment was conducted in accordance with both DNREC and the US Environmental Protection Agency (EPA) Rapid Bioassessment Protocols Results of the assessment indicated that there were no deleterious effects on the benthic macrofauna as a result of the elevated metals in surface water

No formal human health risk assessment was performed In place of the risk assessment contaminant concentrations were directly compared to the Delawares URS or US EPAs MCL values The results of this comparison indicated that potential human health risk existed in the potential use of groundwater due principally to the presence of vinyl chloride and to a lesser extent TCE and DCE

Upon completion of the RI and after establishing remedial action objectives DNREC usually requires a feasibility study (FS) to be performed in order to evaluate the various options available to remediate a site However for some categories of sites with similar environmental problems the EPA has developed presumptive remedies Presumptive remedies are based on historical patterns of remedy selection and the preferred technologies typically implemented at sites with similar characteristics

In the case of landfills the EPAs Office of Solid Waste and Emergency Response has developed a presumptive remedy policy entitled EPAs Presumptive Remedy for CERCLA Municipal Landfill Sites It was concluded by EPA that containment technologies generally would be appropriate for municipal landfill waste because the volume and heterogeneity of the waste

3

generally make treatment impracticable DNREC has previously reviewed this policy and concurs with EPAs approach and has adopted EPAs presumptive remedy of containment for municipal landfills By using this approach DNREC has determined that this will streamline the remedial process and at the same time provide protectiveness to public health welfare and the environment

The Department has placed a copy of EPAs Presumptive Remedy for CERCLA Municipal Landfill Sites and a supporting document entitled Conducting Remedial lnvestigations Feasibility Studies for CERCLA Landfill Sites at the DNREC office location located in Section 60

40 REMEDIAL ACTION OBJECTIVES

According to Section 84 (1) of the Regulations site-specific remedial action objectives must be established for all plans of remedial action The Regulations provide that DNREC set objectives for land use resource use and cleanup levels that are protective of human health and the environment

Qualitative objectives describe in general terms what the ultimate result of the remedial action if necessary should be In view of the presumptive remedy policy developed for landfill sites and in consideration of the commercial land use scenario and the DNREC Regulations Governing Solid Waste the following qualitative objectives are determined to be appropriate for the site

1 Prevent human exposure to impacted media

2 Prevent migration of contaminants off-site

3 Prevent environmental impacts to surface water bodies due to impacted media at the site

4 Minimize ecological exposure to impacted media

5 Protect and preserve threatened or endangered species and maintain habitats that presently support threatened or endangered species

These objectives are consistent with the current and proposed use of the site as a former landfill in a rural setting Kent County zoning policies and state regulations governing water supply

Based on the qualitative objectives the quantitative objectives are

1 Prevent human exposure to landfill waste and associated contaminated soils through maintenance of soil and vegetative cover and through institutional controls

2 Prevent human exposure to groundwater contaminated by TCE 12-DCE and vinyl chloride above their US EPA MCLs of 5 J-LgI 5 J-LgI and 2 J-LgI respectively through a combination of institutional controls and monitored natural attenuation

4

3 Direct surface water drainage off and away from the landfill and minimize precipitation percolation through the landfill waste that could leach soil contaminants into groundwater through maintenance of soil and vegetative cover and elimination of areas of standing water on the surface of the landfill

4 Prevent ecological exposure to soils with concentrations of VOCs SVOCs and metals above ecological thresholds through maintenance of soil and vegetative cover

5 Monitor groundwater and surface water quality so as to assure that no further degradation of these media occur

6 Protect and preserve threatened or endangered species and the habitat which presently supports threatened or endangered species through institutional controls

50 PROPOSED PLAN OF REMEDIAL ACTION

Based on the presumptive containment remedy the existing and proposed land use scenario the Regulations Governing Solid Waste and Regulations Governing Water Supply the following remedial actions are proposed to ensure the long-term protectiveness to public health welfare and the environment

1) Maintain the integrity and effectiveness of the existing soil cover including making repairs as necessary to correct the effects of settling subsidence and erosion so as to promote the establishment of vegetative cover minimize infiltration and percolation of water into and prevent erosion of landfill waste Maintenance of the existing soil cover would be conducted in accordance with a DNREC-approved 0 amp M plan and schedule

a Note that the land has been used as a solid waste disposal site a description of which shall include a detailed map of the area(s) that were used for solid waste disposal and

2) Placement of a deed restriction which will

a Prohibit further development of the site and designate the property as Open Space

b Note that the site is included in a Groundwater Management Zone (GMZ) which prohibits the installation of any water well on or groundwater use at the site without the written approval of DNREC

c Prohibit digging excavation or any disturbance of the soil cap without the written approval of DNREC and

3) Establishment of a long-term groundwater and surface water monitoring plan The scope and frequency of monitoring would be conducted in accordance with a DNREC-approved o amp M plan and schedule

5

In addition DNREC will place the site within a GMZ which is an internal document that restricts groundwater withdrawals at the site

60 PUBLIC PARTICIPATION

DNREC actively solicits public comments or suggestions on the proposed plan of remedial action and welcomes opportunities to answer questions Please direct written comments to

DNREC Site Investigation and Restoration Branch 391 Lukens Drive New Castle Delaware 19720 Attention Keith Robertson

The comment period begins XXXXX 2002 and ends at the close of business (430 pm) XXXXX and if so requested a public meeting will be held on the proposed plan The meeting time and place will be announced if said meeting is requested

KJRlrm KJR03012doc DE 0108 IIB8

6

apound~ ~zdo3 ~n Blevins Date of Review of Proposed Plan

tYDirector Division of Air and Waste Management

7

Figures 1 3 from the 1998 tetra Tech Remedial Investigation Report

8

Figure 1 Site Location Map

9

Scale linch =2000 feet

---shy

-----19938

Figure 1-1 Site location map Kenton Landfill Kenton Delaware Source ADe Street Ma Book Kent Coun Delaware 5th Edition

Figure 2 SiteLocation Map Showing OUI and OU2

10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p

shy -~ lJrlltJch ---

lt

) I

J f

l

Trailer Park

jLegend I

- - Site Boundary It - middotStream I lt

++-t+t- Railroad Tracks I) - ltgt lt

lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt

Figure 1-2 Site map of Kenton Landfill showing OUI and QU2 Kenton Delaware

~

Figure 3 Site Plan Showing Monitoring Well Locations

11

Appendix

12

TABLE 4

DISSOLVED VOLATILE ORGANIC COMPOUNDS ANALYTICAL RESULTS DETECTED ABOVE THELABORATORY QUANTITATION LEVELS

FROM MONITORING WELL SAMPLING KENTON LANDFILL

Tetrachloro-TOTAL Trichoro-CARBlYN VINYL etheneDISULFIDE CHLORIDE 12-DCE etheneSAMPLE BENZENEWELL (ugl)(ugll) (ugll)(ugll) (ugll) (ugll)NUMBER DATE

NA lt2 II lt1 lt1 ii lt1I =1=--W~_2JaomiddotHmiddot I -lt10 lt10-r-lt1O-middotmiddotmiddotmiddot16middotAug-95 lt10---l lt10 i lt5 -05-Dec-961~- i lt25 I lt5 --lts lt5 1 lt5 shy

MWTT~27jan941--ltf ---r---NA-middotmiddot-middotTmiddot---Z--middot ~-lt1-- --ltf---r-lt1

I 16-Aug-95 lt9__ __~~6~-i__lt5 t- ~l~_____0-l_-~310~ -~= I 05-Dec-96 I lt5 lt25 I lt5 lt5 lt5 i lt5

-MW~3T 27-Jan-g4 r--middot14-middotmiddot-r-middot-NAmiddotmiddotmiddotmiddotmiddotmiddotr--14fmiddotmiddotmiddotmiddot- middotmiddotmiddotmiddotmiddotiOO-~middotmiddotmiddotmiddotmiddot-middotmiddot5i-i-- ltf

--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~

MW4middotlmiddot~i~~~~iT imiddot_middot-l-middot~middotmiddot_middotmiddotmiddotmiddotmiddotI~---rmiddot~middot~middotmiddotmiddotmiddotmiddot~~~~~ -_~~ --middot-lmiddot-~-middot=~~~~middot=~

=-~w~~=F~6f~2~~~f- W-j~--~~middot- I~ r ~~~1r-1~~~- ~~ f---~middot~-~-~middotmiddot

lt10~~~~6 ~(6~~~~~~~=F-~~~middot~~~middotT~~middot~~ ~ middotmiddotmiddot~~~~rmiddot 1~ 1middot ~~~~L lt5

~~~ ~i((~~J6Aug1U _5fq-=r~-=~ltrq-=-~~[=~~lts-=middot~r_~~lt19 bull=T~~=~ ~Jo_=~c~~middotlt-16 05-Dec-96 I lt5 1 6 J I lt5 lt5 I lt5 lt5

-Mw-f -ni5-Dec-96 I lt5 II

-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy

MW~9-middotmiddotT (ig[fec96-middotI--middotmiddotmiddotmiddot-lt~rmiddot -r--lt25middotmiddotmiddotmiddot--r--middot65 1 middotmiddotiHmiddotmiddot1- ff -middotmiddot-r lt5-middotshy

lt5-middot---shyMW101-05-Dec-96 I lt5 [ lt25 I lt5---lt5- I lt5

-Mw~T imiddotmiddot-05-Decmiddot96-r-ltS---r--middotmiddot14r-r- lt5---middotlts--rmiddotmiddot- lt~rmiddot-middotr-middot ltsmiddotmiddotmiddotmiddot

3y-r---75- middotmiddotmiddot middotT--middot22 middot-I ----g---middot-r-middotmiddotmiddotmiddot-smiddot---shyMWmiddot1TTo5-Dec-9tr i lt5 I

NA No data lt Analyte was belowthe stated quantitationlimit J Estimatedconcentration less then methoddetection limit E Concentrations exceeded the calibrationrange of the GCMSinstrumentfor that specificanalyte ALL NOTESIN PARENTHESIS () ARE DATAVALIDATORS COMMENTS (200) Data Validators detectedconcentration value

TABLE 4middot14 GROUNDmiddotWATER ANALYTICAL RESULTS

MONITORING WELLS MWmiddotB MWmiddot1 0 MWmiddot11 KENTON LANDFILL

5 AND 6 DECEMBER 1996

TOTAL AND DISSOLVED TAL METALS

Sample IAluminum I Antimony I Arsenic Barium IBeryllium ICadmium ICalcium IChromium ICobalt ICopper I Iron Number (ugll) (ugI) lugI) (ugl) (ugl) (ugfl) (ugH) (ugfl) (ugll) (ugfl) (ugI)

URS for Protection i of Human Health J 200 _ L2OOO JO~Q2 1 = 5 1 NA 1 18 1220

16 1000 300

=-~~8(tot~J2middot - middotmiddotmiddot~middot7as---Tmiddotmiddot_lt50middotmiddotmiddotmiddot-zf()r3J~ r ltTo--j--lt1 middot9 r-middot5=~O=[--lt60---=rmiddot~~I~Jlt6~Q~(Q1D_~~5) __ MWmiddot8 (dis~~lved) L lt2~~~__ L__~50 __l__~~Q_ I 355 ~ L__ ~1~~ _J -=19_L 533O L~69_L-=110L~6O(~L) l ~400 ~-10 (total) -middot-j--~T-lt50--middot lt20 522 rlt10-i lt10 17300-ilt6o-r-lt1-1~Omiddot--lt60 (ULTi11oo6- _M~~19~~~I~ed)middot _2middot~L~J=~~~5Q~=~I~-~~~middotP=~middotJ==--5qb -t_middot~(~=~middotI=-~~I9 =16bqI=~~sect~Jmiddot_lt110middotmiddot ~6oj~lf[ 660 --_ MWf1(total) MW=-1 fCciissojved) middot~r~~~~~~f=~~~~=~ ~=~~-~~F1~~~~~rmiddotmiddot -rf~~~~~-~~ middotlmiddot ~~~~~-1---~~~~- ~~~ -~~~I~~~ - lt~~O

Sample I Lead IMagnesium IManganese IMercury l Nickel IPotassium Iselenium Silver ISodium IThallium Imiddot Vanadium Zinc Number (ugll) (ugI) _ (ugll) (ugl)_ (ugI) (ugl) (uglt (ugll) _ (ugfl) (ugI) (ugll) (ugfl)middotl I I IURS for Protection i i

oJ-u~_an~e~It~ __~~bull_j __N~_l ~~ 2__ J9_~ tlA _ _1 _~~ _ J~~__ __NA __ 2 _ J 26 2000

--MWa- totaf)-- lt1tluLfl --2360-r-Tf7slITltci-20-rlt150 -r93SS----rltfol(][fT lt4])-((Xn-4STo-lt1O--i-lt8~6 lt1i6shy-_- _ 1_ _ - __ -------- ----1---middot--------- ___ _ -- -___- - -- -- _-_ - _ _Mt8dissolved) lt~o JLJ~t L 420 __~ ~J~LL_~O~Q_l C159__J_~29_~__L~10JUl)J lt~~(Ul)L4589 lt101_ lt80 lt120

~W-10 (total) -lt10-(UL) --3940- 186 Tlt020 r--lt1S-O--112o-1-ltT6 ULjTlt4] (UL) -goO- -ltfa- --lt8~lti -lt126 MYO(dfssolved) lt1o(U_~fT -3800middot middot middotr--18f~middotmiddotmiddotr~~~620middotL~~lt159~--- )626-~ ltfo(ULj-l~~(6(U~fmiddotlmiddot- 49900 lt1 Olmiddot lt80 lt120

M~_~~~~i~~~~~d) ~~1~t~middot ~~~ -~I~middotT~~~~middotmiddot middotmiddotr~fmiddot~Tmiddot ~~~~-middotmiddotmiddotI ~~~B~~ I~8t~middot i ~~~~ ~~ ~~ ~~d

Notes bull Delaware Uniform Risk-Based Remediation Standards URS for Protection ofHuman Health Ground Water February 1998

lt=Analyte wasdetected below thestatedquantitation limit B=Reported value less than thecontract required detection limit but greater than theinstrument detection limit

NA=No URS reporting levels for analyte (l) Analyte present Reported value may bebiased low Actual value is expected tobe higher (Ul) Not detected Quantitation limit is probably higher

TABI SURFACESOIL AN CAL RESULTS

DETECTEDABOVETHE LABORATORVQUANTlTATIONLEVELS SEMIVOLATILEAND VOLATILE ORGANICCOMPOUNDS

KENTONLANDFILL 1 AND 2 OCTOBER1996

SEMIVOLATlLEORGANICCOMPOUNDS

I I ISenzo (al entachloro-l I Oi-n-butyl l I

Phenol phenol Phenanthrene phthalate Fluoranthn Pyrne anthracene Sample Number Jglkg pgltg Jglkg I9lkg lJljkg Jalkg pglkg

---bullbull -COMPOUND CAifNO---middot--middot---middotmiddotmiddot-middot-ioa-95imiddot- 87~ii6middot5middot- --r-middotmiddotmiddotas-Qsmiddot-middot --84742 206-4-40 129QO() 5655middot3shy---URSlor Protection of Humaniiiiljih-- roo 400000 bull 5000--CiooOOoOmiddot bull NA t 310000middot bull middot 230000 Nt

- URSior Protection of Ihe En~ironmeni i -- 30000 3000 NA NA NA NA NA

1 middot----middot--_-- --- __-__- - - _ - - - 55 2 lt390 lt940 lt390 lt390 lt390 lt390 lt390551114 - - - lt400 lt960 t lt400 middotlttOO lt400 lt400 lt400

551118 lt390 lt940 140J 46 J 180J 190J 79J

~~~_ ss -i~~d~~d iij~-=-~~~~~ --L~ci~ ~9~r ~~ ~~T 1~~O~( l~o~J ~~~- bull

middot=_~===SJtt~(dii~~~ci2Xj_-===-middot __middotltii~o== __ ~~~OO_~i~--lt80C=~~middot-_~B~C====lt8~0=-~~middot=-_~OOmiddot=~~=--8O~== SS 20 lt420 lt1000 lt420 lt420 lt420 lt420 lt420---==SS-2~~d~~diXf---=-~--=~middot~T==middot~~middot middot~~~~O~~~middot~~~=~middotmiddotmiddotmiddot~middot~~5rmiddotmiddotmiddot r~~-~~~ __~- ~~~

SS21 (diluted2xl lt750 lt1600 950J lt750 170DJ 160OJ 89OJ

lbis (2thYlheXYlll -senzo (b Benzo (k~BenZo (a I phttllllale Chrysene Fluoranthene FJuoranthene Pyrene 4middotMelhylphenol

Sample Number uglkg ~glkg ~glkg pglkg pglkg IJljkg

--bullbull- --COMPOUNO-CAs-NO-----middot-middotmiddot --1-17-ai-i -middot21iiij-9----2osggimiddot middot2ofo89~ -50i2a -06-445 -shy- UiiSForProteclion 01HumiddotanHiiiil-middot--- middotmiddot46OOO 88000- 900 9000 1 90 2000

oURS for Prolection of the Environment ~ NA NA NA NA NA NA

552 -- --middot---middotT--J4j lt390middot- ltjmiddotiio --390 lt390 bullbull lt390

55 14 160J lt400 i lt400 lt400 lt400 lt400

===== ~_~~~idt~id~i=middot~====middot~=~E~~middot~~liF~_~~=~~~~=middot=middoti=~=~~E=~=~~-middot~=8~ ~~J 36- 55 19 68J lt400 lt400 lt400 lt400 lt400

~~= bull middot~S~~ ~d~~edmiddot~)_~-middot~~~~~~L~=~~~~middotmiddot~~middot~~_~~~==l~-~~~~~ __ ~~~~_ - ~~~ - __~~ __ ___ _ bull__S~~~Oldilul~il2~)__bull L~_() ~ __~~~Q_L__8~Q bull ~~50 L_lt850 _~850___

5S21 L 300J 110J 1 170J 63J 120J lt380 SS 21 (diluled2x) ~50 OJ 120OJ 170OJ lt750 lt750 lt750

VOLATILE ORGANICCOMPOUNDS

I Toluene Sample Number ualkg

_ ---bullCOMPQUNOCAS110- --_--- _-_ 1Oii8ii~3 - -VRSio Protection 01HumanHeallh---middotj---middot-siiOomiddot ---- shy---URS[or Prolection 01ihe envlronri-ienimiddotmiddot-middotT-middot-middot---2oiiooo---- - - middotrmiddot_middotmiddot-- -- - _ - --55 17 - --- j middotmiddot----middot 280middotJ - ---

Notes 55 =Surficialsoil sample

bull Delaware Unilonn RiskmiddotBasedRemediationStandards Protectionof Human Health CriticalWater ResourceAreaUnrestricted useandProtectionof EnvironmentFebruary1998

J =Estimatedconcentration less thenmethoddetectionlimit OJ =Estimatedcooc8Iltraiionless then melhoddetectionlimitata dilution012~

lt =Analyle was detectedbelowthe slaled quantilationlimit NA =No URS reportingleversfor analyle

TABLE 4middot16 SURFACESOIL ANALYTICAL RESULTS

DETECTEDABOVE THE LABORATORY QUANTITATION LEVELS PESTICIDES and PCBs

KENTON LANDFILL 1 AND 2 OCTOBER 1996

PESTICIDES

Heptachlor Endrin chlordane I 44-00T gamma-

Epoxide44middot00E 44middot000 Endrin beta-BHC Endosulfan I Dieldrin IAldehyde Sample Number ~gkg IJgkgIJgkg IJgkg 1J9kg 1l9kg 1J9kg 1J9kg _ 1J9kg IJglkg

COMPOUND cAs NO ----rS10374-i r50293 middot72-55~~i72-54middot8 7220middot8 r 31985-7T1024-57middot3 95998-8 60-57-1 7421-36-3 47000 4il NA-- ~~~~for protecticmOf Huijal1~ealii~j)~A~ __~ bull ~~~6middot~ middot2009~i 3000 20001 ~AJ 70

URSfor Protection of the Environment NA NA NA NA NA NA NA NA NA NA

SS18 bull 41 749P (J) lt39 lt39 lt39 lt20 i lt20 lt2b lt39 lt39 ----lt21-middot--- --lt40- lt40 ~ =~_itJ9 ~~~=~~~~=~-~~2f-~ __~((~5oC~fsect(~L~~=j5 TJC _~=~4 0-- ~_-~iC---middot -lt21

---middotlt22-middotmiddot lt42S520 ~22 27 P (J) ~~6_ (JL __ ~42 1qp (J) lt2 __ lt22 lt42 SS 21 25 570E (530) 140PE (99)310 E (J230L lt38 69P (J) i 85P (J) 33 PO (27) 26 30

PCBs

Arocfor 1254 Aroclor 1260 SampleNumber I IJgkg I IJgkg

------ middotmiddotmiddot-cOMPoDNiSmiddotCAS NO------ -- - ---- middotmiddot-H09i69T-- --middot - 1109682~5 - --- URSfor Protectionof Humim Heaiti-imiddotmiddotmiddotmiddotmiddotmiddot- ioo ----r---- 3000 --

URS for Protection of the Environment -- 40006 40000shy------ middot------------ss-ffmiddotmiddot --- - - --------- middotmiddotmiddot----middot---middot70--------- lt40middotmiddot-middot--shy--~~~ -~~~-- -- - _ S~nh9middot~~~~~middot-~middot --- ~= ~4(i~ middot~~middot~fObmiddotp~(Jr

S~20 lt42L 61P(J)S8 21 lt38 68 P

Notes S5 = Surface soil sample

bull Delaware Uniform Risk-Based Remediation Standards Protection of Human Health

Critical WaterResource AreaUnrestricted useFebruary 1998 bull Delaware Uniform Risk-Based Remediation Standards Protection of Human Healthbull bullbull Delaware Uniform Risk-Based Remediation Standards Protection of Environment Feb1998 URSof PCBof 40000 uglkg is for all PCB notsubdivided byaroclor

E =Concentrations exceeded the calibration range of the GCMS instrument P =Greater than25difference for detected concentrations between the twoGCcolumns D =Dilution factorat 10x lt = Analyte wasdetected belowthestated quanlitation limit

NA=No URSreporting levels for anatyte J Estimated concentration less thenmethod detection limit

(250) Data Validatorsdetected concentration value

--- TAr imiddot17 SURFACESOil AIYTICAL RESULTS

KENTON LANDFill 1 AND 2 OCTOSER1996

TAL METALS

Sample l Aluminum rmiddotAntimony - [Jrsenic IBarium Ironl Leoad shyNumber mgkg mglkg J mgkg mgk mgkg mglkg

URS lor Protection I I I i I _ _ of Human Health _I 20000 i 3 _1_ 04 L__550 _L __~middot5 i 4 NA J 35 22 1000 23000 400 Jl_~~_~rE~~~~~~o of th~~I)y~~ NA L_5 0 L__ __ J ~~_~_o~~ ___~_~____~_~_ ~A ____~Q_l-~~Q-i--1 3_

SS 1 _5620 (Jl] lt011 (UL)l 14JKLL 30-~__ 035 B 016 B 836B 53 18 B 29(9_ 4370 151 (J)

~~- middot1 13~~0(J)middotmiddotIltOo~~[tmiddot1i(~16~88+middot0~49B--+middot~~~~-middot11~J~-j_ ~~ 2~o8B 2~26~~f~ 7~~~0~l 6~middot~1J) 55 4 - - 5910 1 ltOf2 (ULl tmiddot 1~6 (Jl 399 050-6 024Bi591B -67 24 B 37(1(6860 (J) 362 SS5 t--5030 middotltO11ULT19middot(J-middot248 middot033S-01581 7756--59 176 216 hmiddot 6020(J) 167 _ -_-- -___JL middot--LL _ - _ -_ - -- -_ ---r--- __ __L1_

1shy

5S 6 _ i 8960 l _025~ 2~(J) 454 M7 B 020 B i 159 B 73 20 B 48 (K) _ bull 6290 (J) 25 5S71 _~_0QL 01_~_JampJ~L__~2~ LJl3~3__L_0~9_B __ __2(J~__ I_ _17 198 _266_5L_OOO(J) 21-7_

middotSSmiddotii8-middotmiddot--middot- -- 2610(J) I lt011 (Ul) 11 1318 i 014B lt011 I 9548 30 12B 18B(Kl 2530 96 ----- -- _ 1--- -- _ 1 - --bull -

SS~~i DU~-~- L~~~~gmiddot~~lI-~lt6~2(~LiLJ~middotmiddot4~~8jmiddot~j~ JJ~~~j- ~~t+ ~~3~H~~--middotmiddot ~~~ ~~~ 5S 10_ 8070 l_~011 (LJ~U 43(J) ) 41 M8 023B_ 1O8 1 86 30 B 25B(K) 8000 (J) 74 SS 11 _~J~(J) -1-ltOmiddot~)jJ~WJ2 (~L-2~4- -l_9p~ __011_S___198_~_+ 54 188 74J19 _41po 85

SS~2 __ L~~oP)_ -~olq(~~Lt~Jl() __~J 8~_9)9B ____O 1B__ __2z7_B__1_~middot6 158 16Blltt_ 4510 59 SS13 l 103qO J O~_s_ _25jJ) ~~3 030S 0346 L_2~O~ 112 388~(KL11900(J) 15 8S14 J 4~00 L_02~~ __ ~ __~(JL_4L7 035B ~ 041B1~7_1__ 109 266 6~__9080(J) 431 5S 15 8610 L01~(ULL~16JJL 611 __ 047E3 020 i 23deg_8 i _87 436 18B (K) 8840 67 S8 16 i 8030 lt012(Ul) 15 (J) 464 035 B 027 B 361 B j 10 33 B 54 (K) 10200(J) 113 SS17 6510 i 17s i31middot(Jj107 i042B 30 1800r 131 68 285 middotmiddot24700(J) 182 5S 18 8920 i middot middotmiddot022 Bmiddot24 (J)63- 048 B056 7531 123 38 B 58 (K) 11100(J) 375 S5 19 -4240-- oj9B~ -2~1(j)-611 -Oj3 6-----middot-middot072middot1middot030 T 90 30 B 165 - 6620 (J) 582 S5 20 11100 -jltcL131uLTT3sect(J) -- )25jfio ~ 29 __ - 582~middotT--JO7 48 B 56 (Ilti middotmiddotmiddotmiddot10900 (J) 329 SS21 5800(J) 059B 19(K) 196 i0266 095 1100 j 198 28B 281 7190 194

SS 22 12700 (J) middot1--Q2~)~=T50 IKYJ j2T~b3f3 0438-669 Lmiddot154 38 B41(K) 16000 91 S822 FieldDuo L 12000(J)] 0J3B i3~5(Kl 6~ 043B O38B 588 136 48B 52(K) 14000 117

SS~3 _ ---l--sect~~q _ 0~B __ IJ~JJl __ J2~ p~5B 25 i ~960 1_ __ 104 36 B 309_ 9710 (J) yo ~~~~ - _ 1-- ~6sectmiddotHl +middot~amp~H~middotU--j- ~~~~ j-~~ --6~1~OB +~d~ -i~6~--r---~~ ~~ ~ 2~55i7k) ~~~ 1~9(J)

Notes SS =Surfacesoil sample

Delaware Unilorm RiskmiddotBased Remediation Standards URS for Protection 01 HumanHealthCritical Water ResourceArea Unrestricted Use SurfaceSoil February1998

lt =Analytewas detected below the stated quantitation limit 6 =Reportedvalueless than the contract requireddetectionlimit but greaterthan the instrumentdetectionlimit

NA =No URS reporting levels for analyte February 1998DelawareUniform Risk-Based Remedialions Standards SurfaceSoil URS lor Protectionof the Environment

Criteriais for trivalentchromium no criteriafor hexavalent form (J) Analytepresent Reportedvalue may not be accurateor precise (estimated value) (l) Analytepresent Reportedvalue may be biasedlow Actualvalue is expected to be higher (K) Analytepresent Reportedvalue may be biasedhigh Actualvalue is expectedto be lower (Ul) Not detected Quantitationlimit is probablyhigher

TABLE 4middot17 Iltont) SURFACE SOIL ANAl ~AL RESULTS

KENTON LA ~=ILL

1 AND 2 OCTOBER 1996

TAL METALS

Zinc Number mgkg mglklL mgkg mgkg mgkg I mgkg mgfkg mgkg mgkg mglkg mgkg

uRs lor Prolection I j I I I 1000

50

Sample middot1 Magnesium IManganese IMercury INickel PotasSiuffi] Selenium I Silver I Sodium IThallium IVanadium I

UR~~o~~~~i~~~e~I~~ EnY~~-_4~~~- ~~- hi+o _~w~~ 12~ wI ~~-B--SO~~~Y~ 2~~middotB--Lmiddot~1-middot--lmiddotn 168-shy5S2- j1220 middot---306---Tmiddotlt011 168- 36fBmiddot(l)To14B 1lt093middotiUl)-S32S bull 011 -27 497 553[716 --629--- 012 471182610126 T laquofa9 1914 B (lj- lt012128 18 SS 4 673 l 77- I 013 54 i 199BT 031 B lt087994 Bil) lt012 i 131 214(J 55 115--- 535 BmiddotTmiddot-middot403- 1lt013 1 I4 Eir-f32S--rO18S -087 -8middot64i3il) lt011 106 119 (J)

5S $--- - - 5238 middotmiddot-r-49S-middot--ltois 4s-i3-T157-g-LliO31i3- jmiddotltCi99middot -7oJ-s--6163 121 16i (j) 557 365B r--middot884--middot--middotlaquo)14- 278j1148--0298 lt099- ~i3middot5B C lt013 99 188 (J) __ _ _ __ ~-_ -~ _ _ lt2

90(K) shy~~- 1i~060~J) -j-11Ji- ~~~ h~middot~middot~ -I-6~~~Ld ~i~ middotl01middot~middot(~~-5J~middot~~C)middot6~1~~ 5~B 20)

55 9 Field DU 4060 J r-7S6T-lO1f 7Sirr29SifT lt0-11 iltf6(uLjr- 58-2 Bmiddot(middotmiddot014884 238 13 (J) 137it~---I~l~i~~~+~-i~-1~~~E+~-=pJf~~~(~1~~~1~til~~middoti~Ji-~_1 132

134 (J) 522middot(i) 133 (J)iim- -_ItF~~tf~t3tl]fr~~~~~~~I~ll~tljmr 1iJ 237 (J) 291 (J) - Imiddotmiddot ----- JJ -

55 ~8_ 937 1 ~6 __I__ 02~ _ 66_~ __1~9_B__L_027 B ltO9l901 B (L) lt02 179 815 (J) 5519 871 i 102 023 201 i 1868 0218 lt095 i 679B lt012 90 224 (J)

_ -_- SS20-- -- 1030 -226--1-018 -88-f~30iB-j--6386 - lt691 1857 B (L) -021 B 175 507 (J) 85 503~~ ~~~ +~-~~~-==middotmiddotI--~~o middotmiddotjmiddot~-rmiddotmiddotmiddot1~~middotfF~~~ ~ lt60~1~L) -~~~~ ~ ~ 2 317

55 2iFieldQup 976 middoti3imiddotmiddot--T lt011 ~7 middot-middot42middot9S---- 031B lt09zUl)1366 B 012 B 224 382

___ 61~ Jmiddot_~~~=-J=Q~~middotj~5_middot5~ __ CO13B_ lt0J3Jmiddot86~2 B (C)ltO11 bull111 _233 (J)55 2~ __ 216~~ ~1- ~~~-~ middot-1middotmiddot--~6~--middotI~~~~-middot __ ~~+J~~~lgt lt0~1~0(~Li ~~~ fgt~i--2g03t lt~~~~ +_ ~- -r 96(1lt

Notes S5 =Surficial soil sample

bull Delaware UniformRisk-Based Remediation StandardsUR5 for Protectionof Human Health CriticalWater ResourceArea UnrestrictedUse Surface Soil February 1998

lt = Analytewas detectedbelow the stated quanlitationlimit B =Reportedvalue less than the contract requireddetectionlimit but greater than the instrumentdetectionlimit

NA = No UR5 reporting levels for analyte bullbull February 1998DelawareUniform Risk-Based Remediations Standardssurface Soil UR5 for Protection of the Environment

Criteria is for trivalentchromium no criteria for hexavalentform (J) Analyte present Reportedvalue may not be accurate or precise(estimatedvalue) (L) Anayte present Reportedvalue may be biased low Actualvalue is expected to be higher (K) Analyte present Reported value may be biased high Actual value is expected to be lower (Ul) Not detected Quantitationlimit is probablyhigher

TABLE 4-19 SURFACE WATER ANALYTICAL RESUL15

DETECTED ABOVE THE LABORATORY QUANTITAlION LEVELS VOLATILE AND SEMIVOLATILE ORGANIC COMPOUNDS


VOLATILE ORGANIC COMPOUNDS

Acetone 2-Butanone Sample Number Jl9L JlgL

------COMPOUNDCASN5~-middotmiddot ----middotmiddot-middotmiddotmiddotmiddot--middotmiddotmiddotT-middot-middotmiddotmiddotmiddot67-64~T-middot-middotmiddotmiddot r 78~~Y3~3 URS Protection of the Environment i NC t NCshy---- ------- sw-ff--middotmiddotmiddot---middot-middot--middotmiddotmiddotmiddotmiddotmiddotmiddot--middotmiddotmiddot-middotmiddot-middot----ii~3-middot-middotmiddotmiddotmiddotmiddot - r 29

~-__ -- _-___

SEMIVOLATILE ORGANIC COMPOUNDS

4-Methylphenol Sample Number 1l9fL

COMPOUND CAS NO middotr---middotmiddotmiddot_middot106-44-g--middotmiddotmiddotmiddotmiddot-middot --

-- shyURS Protection of the Environment I NCmiddot---middotmiddot-middot-middot---shy

I ____M~middot_middotmiddot

SW1 (duplicate) 1--middotmiddot-----middot4T----middot-----middot ---_shy _-----~_shy

Notes

1

SW = Surface water sample February 1998 Delaware Uniform Risk-Based Remediations Standards Surface Water Unrestricted use URS for the Protection of the Environment

J = Estimated concentration less then method detection limit

TAB middot20 SURFACE WATER AllALYTICAl RESULTS

KENTON LANDFill 1 AND 2 OCTOBER 1996

TAL METALS (Total)

Sample I Aluminum I Antimony I Arse niC I Barium Beryllium Icadmium ICalciumlChromium I Cobalt J Copper I Iron I Lead Number JIglL lgL _lJgL ~~gL _lJg~ IJgL ~gfL I ~g~ J9IL IJgL IJglL lJglL

Fish Ingestio I I I URS~~~r~~6fil~~~~lih~nvmiddot+middotmiddotmiddot~~ -middotmiddot1_middot_middot_51~04~middotmiddot--I--~8~middotmiddotmiddotmiddotmiddot~t-i o~~8 - ~~ 1~1---~~~ middot1 ~~__ ~~1~~0 8i~L ~~~ _=~~ Lmiddot~9606~ --~ ~~~t~~=~F~~~~middot~middot~~2fi~-middotmiddot~~ ~middot~middotmiddot_~tf r06i06~-~1~middot~a5f~ r~sect~fmiddot~middot=j~~46(~- ~~~~~ ~~ i~

-- -----i~-r=_~=0~V8~~=F~1R~ff-J~~ft~i=~~t~=f[i~~r~~-~~Y~=~i-~~f~~~(~l Sample IMagnesiumIMariganese IMercury INickel IPotassiumISelenium I Silver I Sodium IThallium IVanadiumI Zinc Number IJgfLlJgL Jl9fL 1J91L IJgfL IJgL 1J9L IJgL IJgL IJgfL Jl91L

Fish Ingestion iii - - -- -I iii ~RS~~fir~j~~~~~~~~~nv middot~t~~C--~~ -- i-_jJJ~~ -l--~~- =1middot -~l~if~--l~poundo ~~~~~-~Lmiddot middot~t~~ -~~--~l~~~ _ __ ~YV~ J 1780_B _ __484 _1-020 __ L1~S_~_5l9_B __-__~~_~_ I lt7O L 8190 lt20 1558 ~ 205

SW2 bull 11400 11300 i lt020 588 5580 i 21 B I lt70 9760 lt20 848 i 340 -- _ --SW3------j-i660 - ---628o--i--ltob--r-162B--3i308-~--fTB ------lt70_ --9f20 --lt20-- 254 If-- - 100-shy

-- -----~-- - __ - - - ------- --- -- -( - -I

-_ - ~-~- ----middotmiddot-1-~~~~--middott- _~~~----I-ltOo~lomiddot_middotI--z~~~~-J~~-~middott--Imiddot _middot~H--+---~j~b -middotlmiddot_~~~~---- 2~9~OB middot1 lt5102~O

Notes SW Surface watersample bull Slate of Delaware Surface WaterQuality Standards as amended February 2 1990

Human Health Criteria ForFish Ingestion lt Analyte wasdetected below the stated quantitation limit B Reported value less than thecontract required detection limit but greater thantheinstrument detection limit

NA Nosurface watercriteria set for this analyte bullbull February 1998 Delaware Uniform Risk-Based Remedialions Standards Surface Water URS for Protection of the Environment

bullbullbull Based on hexavalent chromium themosttoxicform Criteria for trivalent chromium is 17361Jgl (l) Analyte present Reported valuemaybe biased low Actual value is expected to be higher (K) Analyte present Reported value maybe biased high Actual value is expected to be lower

TABLE 4-22 SEDIMENT ANALYTICAL RESULTS

DETECTED ABOVE THE LABORATORY QUANTITATION LEVELS SEMIVOLATILE ORGANIC COMPOUNDS



bis (2-ethylhexyl) phthalate

Sample Number llgkg

-middotmiddot-------middotmiddotmiddotCOMPOLJrf[)CiS-N-6-middotmiddot ---shy - -- --middotmiddot-middot-117-81=77middot-middot-middot--middot --- shy___ _ URS for Protection of the Environment bull_ __ _bullbullbull______ j1__ 1000000_ _bullbull bullbull__

- -___--_ ~middot~~~~_=_~=-middot-middot-sD21re-aJyzed) L ~_70 J

Notes SO =Sediment soil sample

Delaware Uniform Risk Based Remediation Standards Protection of the Environment February 1998


TAP 4-23 SEDIMENT A TICAL RESULTS

KENTOl LANDFILL 1 AND 2 OCTOBER 1996

TAL METALS

Sample IAluminum IAntlmony IArsenic IBarium IBeryllium ICadmium Calcium IChromium I Cobalt Copper I Iron Lead Number mglkg mglkg mgkg mglkg mglkg mglkg mglkg mgkg mglkg mglkg mglkg mglkg

URS for Protection of the Env i NA 20 NA 20 NA i 1 I NA 81middot NA i 34 NA 47 - - soT - --shy ----middotmiddot-1--s98()_middotmiddott-- 024--s-T---1~3Ef----- -7i3-~-o-5fB-J--61-6BI--236-B---r-- 5-9-- ----rmiddot-iOSmiddot-rmiddot53 (KY [31001214shy-~ - SD 2-----==--- _1~~--~1 ~0_14__~~) __LO)9B fJ6~B L_ 925J3__ i-middot-lt0 1~ ___ j__ 9-B L_~2O(middotKj~I~ lt4 __1 --lt(3 -r1~30-1 _~-1-

803 3710 i lt013(UL) 015B 441 0628 i 0148 I 797 i 54 lt13 13B(K) 1050 37 SD4 - 819(jT61SmiddotBmiddot-(6(J) 418 C)56S 1 019-S-1270 j 122 42B r 68(K)middot 5420 67

- --- bull---- middot--middot-middot1-----middot-middotmiddotmiddotmiddot --shy middotmiddot-- --middotmiddotmiddot--middotmiddotmiddotmiddotmiddotmiddot-----1middotmiddotmiddotmiddotmiddotmiddotmiddot shy ------+--- r SD5 3040 j lt014 (UL) I 069 B i 332 i 066 B I 024 B I 1370 45 (K) 18 B 14 B (K) 5090 i 49

Sample IMagnesium IMangansse IMercury I NICkel IPotassium ISelenium SilVer I SOdium IThaIliUm lvanadium- Zinc Number mglkg mglkg mglkg mglkg mglk9 _ mg~g Jl19(kg mglkg glkg mglkg mgkg

~~s~pyenmlhmiddot~~t~~[t~J1+1middot1=~~r+i~~d~~k=wwu~Jf~fff~+~~~r~middot 1i~1j - ----~~ -middot_--middot middotImiddot_-+~1~ --1t---1middot--z~middot-N +middotmiddot28~l+-middotmiddot-~~middot~- Imiddotlto~11~(~L)Pmiddot~H~q middot1middotmiddot~middotf~-te)+middot~~l~-+ ~~~ fJ~h --------- middotS[jmiddotS-- middotmiddot----middot-rmiddot-361S--T 252 -laquoi13--i3-oB-r75~i3B([)-I-lto-13-llt[f(ULf- 678-smiddot--I--lt013---62middotS 1middot14(K-)

Notes SD=Sediment soil sample

lt = Analyte was detected below thestated quantitation limit B = Reported value lessthanthe contract required detection limitbutgreater than the instrument detection limit

NA= NoURS reporting levels for analyte February 1998 Delaware Uniform Risk-Based Remediations Standards Sediment URS for Protection of the Environment

Criteria is for trivalent chromium nocriteria forhexavalent form (J) Analyte present Reported valuemay notbe accurate or precise (estimated value) (L) Analyte present Reported valuemay bebiased low Actual value is expected to be higher (K) Analyte present Reported valuemay bebiased high Actual value is expected to be lower (UL) Notdetected Quantitation limitis probably higher

E 15000

( 145CQ

SIlE PLAN SHOWING ~ONITORING WElL LOCATIONS

KENTON LANDFlU ICtNrote llQdMI[

$ lt

-

~

-Ioe

EA ENGINEERING SCIENCE AND TECHNOLOGY

yenlEU INSIDE ORElV NORTHING tASnNcmiddot

PIPE ElEV MW-l 700 18317331 15511380 MW-2 70~ 69050 leO~9510 740192 MW- 70820 390 16964494 15571824 MW-4 89870 879eo tamp345338 18220510 MW- 71120 AavO 186$4825 1$851591 12940 70500 10471907 158t127e MW-7 71170 89150 18M3 15260118 MW-8 89170 67490 17M9147 15471848 MW-9 118290 7 18Sl69202 15t89372 lolW-l0 851120 63310 173G8078 15285841 MW-tt 0750 88140 1718854-3 1513304 MW-1~ 71180 88500 17270089 156415J7

( 16000

( 15000

-

TABLE OF CONTENTS

10 INTRODUCTION 1

20 SITE DESCRIPfION AND HISTORY bull 2

21 SITE SETTING 2 22 SITE AND PROJECT HISTORY 2

30 INVESTIGATION RESULTSIFEASIBILITY STUDy 3

40 REMEDIAL ACTION OBJECTIVES 4

60 PlJBLIC PARTICIPATION 6

LIST OF FIGURES

FIGURE 1 SITE LOCATION MAP 9

FIGURE 2 SITE LOCATION MAP SHOWING OU1 AND OU2 10

FIGURE 3 SITE PLAN SHOWING MONITORING WElL LoCATIONS 11

LIST OF APPENDICIES

APPENDIX A Remedial Investigation Laboratory Data Summary Tables

10 INTRODUCTION








1


21 Site Setting







2








3















4














5







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-

10 INTRODUCTION








1


21 Site Setting







2








3















4














5







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


21 Site Setting







2








3















4














5







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-








3















4














5







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-















4














5







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-














5







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-







6



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-



7


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


8


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


9


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


---shy

-----19938



10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


10

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-

Not to Scale

lt lt

lt lt

lt lt

lt lt

lt

OU2

p


lt

) I

J f

l

Trailer Park

jLegend I



lt lt

1 lt lt1 lt

J lt

if lt

I(f

QU1( lt

lt I

~ all

~ lt ~ lt


~


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


11

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-

Appendix

12

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-

TABLE 4








--- I ~~~~~~~~l~r-l ~rl390 ~5~26-6rl31f-~~~o) ---~~ ~~1~==~






-lt2-5----- -lt5----75--r--lt5---- --lt5~ _shy












16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-







16 1000 300



















551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-










551118 lt390 lt940 140J 46 J 180J 190J 79J









55 14 160J lt400 i lt400 lt400 lt400 lt400














PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-




PESTICIDES







PCBs




S~20 lt42L 61P(J)S8 21 lt38 68 P









TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-



TAL METALS





1shy













KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-


KENTON LA ~=ILL


TAL METALS



50






















~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-







~-__ -- _-___







Notes

1





TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-



TAL METALS (Total)






-- -----~-- - __ - - - ------- --- -- -( - -I











Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-






Sample Number llgkg








TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-



TAL METALS











E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-

E 15000

( 145CQ



$ lt

-

~

-Ioe




( 16000

( 15000

-

Documents

Kenton Landfill QUI Kenton, DE - DNREC Alpha Plans...1.0 INTRODUCTION The Kenton Landfill (site) consists of approximately 98 acres and is located 1.5 miles south of Kenton, Delaware