Document nNy5wa5X8orrEDjR12b7z6J86
AR226-2551
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RCRA Facility Investigatioii Results Review March 14,2001
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Introductions Site Background Site Hydrogeology RFI Scope of Work RFI Results Conclusions and Recommendations Wrap-Up
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M1,2a0n0ufaaccrteusrionngObehgioanRiinve1r9i4n8'western WV Engineering Polymers, Fluoroproducts, and P6dP
Engineering plastics (Delrin) - Nylon pellets and filaments (Zytel) - Acrylic resins and molding compounds - Polyvinyl butyral (Butacite) - Teflon & Tefzel Approx. 2,400 employees (DuPont's 2nd largest)
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bI1n9yv8Ee9sP-tiAgCaRotireorgenico(tinVvIIe)IAIorfcet6qiouSniWroinMrg"UVHseSrWifiAca"tipoenrmit issued 1991 and 1992 - Conducted VI
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Riverbank Landfill Anaerobic Digestion Ponds Polyacetal Waste Incinerator
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SWMU LOCATIONS
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SWMU LOCATIONS
Operated from 1948 to mid-1960s Measured 4,500 feet long by 150 feet wide Friivlleerdflsoteoedpplsalionpe separating main plant terrace from Filled with general plant solid waste Closed by covering with soil, vegetation, and rip-rap Today the RBL is densely vegetated Mtcroeenatcthmeyrlenenn-tenscyohswltoemrcidoentsreoellpedwabsytchoellmecatiinonaraenadof
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Operated from the mid-1950s to 1988 (three ponds) Used for wastewater treatment
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uCsonliodlseaernldydibnvygergseeomtialostivoi(nn5.g,40li0quciudb, iscluydagrdes,)claanyd, acnodvesroimngewith
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Operated from 1959 to 1990 bCroicnks-ilsitneeddtopittws o, ten-foot deep concrete and fire Used for the burning of off-spec polyacetal polymer Aclereaanwsoaisl calnodsegdrabvyelexcavating and backfilling with
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Operated from 1948 to 1965 U(es.ge.dpfloanrtthtreasohp,eonffb-usprneicnpglaosftimc,isacnedllaonrgeoanuiscwliaqsutiedss) S(aopilpsrwoxeirme aetxeclyav2a5t0edcuinbi1c9y7a4rd,1s9)89, and 1990 Ifwnoars1p9iln9as0nt,attlehlexedp.BanGsiwona,salnevdealepdewrimithetceleradnrafiinllatgoeadliltocwh Mosdy covered with buildings, concrete, and asphalt
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Simple stratigraphy - Ohio River Terrace Deposits Fine grained soils near surface and along riverbank Thick sand and gravel unit:
-- Primary geologic unit -- Overlies Permian age shale/sandstone bedrock -- Contains site aquifer
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Site aquifer in sand and gravel formation Depth to groundwater is approximately 60 feet pGrrooduuncdtiwonatewrefllloswysdteirmection is controlled by on-site
--East Well Field (seven wells-2000 gpm) -- RanneyWell (800-1000 gpm) --Lubeck Well Field (five wells-700 gpm)
Phiugmhpwinelgl yiniedludcses river recharge to aquifer, results in
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OPhiLoERISivTeOr TCEerNraEADGeEposits
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CROSS SECTION A - A' WASHINGET. OI.NduWPOonRtKdeSNPeLmAoNuTrs,&WCEoSmTpVaInRyG, IInNeI.A
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Describes the comprehensive field program Presents and discusses all site data Presents groundwater flow modeling results Pdbexryriepncsokoesimnuntrgspeawsmrciarneetgederinmainatogx-iRlmeBvueCmlshcfuoomnrsaitnnidtuhueesnatrltitachlorsnioscikelsnetavrnaaldtuioantisonin cPhreasraecnttesriszcirnegensiinteg-hlaebveitlaetcwoliothgiincathl erisRkFeIvsatluudaytioanrebay Pfurortvhiedreascctoionnclusions and recommendations for
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Installed 24 new monitoring wells S(tawmoprloeudn4d0s)monitoring wells and 5 production wells Dsarmilpleldes35 soil borings, and collected 15 hand auger mCoalxleimctuedmadpepprtohxoimf a7t0elfyt 150 soil samples to a imCnotoemdrepplrieletadtiaollnreinsuthltse icnonatmexatnonfetrhtehastiteencaobnlecdeptual
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Carbon Tet MeCl PCE TCE Freon 113 FC-143 Arsenic Barium Cadmium Lead Nickel Chromium
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BG RBL/ADP Potable Process
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Well Wells
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Land Use:
--Onsite land use is industrial (current and future) --sOpfafcseit,erelasniddenutsiealis mixed industrial, commercial, open
Groundwater Use:
--Onsite process and potable water --Off-site Well Survey:
* Public water supply 2 miles downriver * GE Plastics' wells west of Washington Works
--mSiitegruantedoefrfh-syidteraulic control; groundwater does not
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Exposure Pathway Evaluation Receptors Site Worker Trespasser Consti' Wkr
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Controlled by Pumping
Site Worker
SaltoundgytahreeaRinBcLlu/AdeDdPterrestrial and riverbank habitat N o significant ecological resources were present
--No critical or sensitive habitats --Nhaobihtaatb)itat reflective of public concerns (e.g,, game --No listed threatened or endangered species
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*Observed Arsenic values were comparable to site background levels.
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PSL is the preliminary screening level for FC-143; AL is the action level for lead. The groundwater screening value was exceed in process wells only.
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SthoeiilrcroenscpeencttirvaetioRnBsCosf faollrcionndsutsitturieanl tssoialsre well below Pleovtealbslfeowr derllinwkaintegr wcoantecrentrations are below screening Ps(TcrroCeceEens,isFngwGele1llv4we3l)sa,steobrmucteotwhnichseawnttearaxtetcireoiensdsndoorftintuwksieondgc-fowonrasdtteirtriunbekanistnsegd Nsitoe uSnWacMceUpstable human health risks occur as a result of NanoySsiWgnMifiUcant ecological receptors or pathways occur at
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Chyodnrtainuluice cporondtauinctmioenn'twell pumping to maintain site eCnosnudreucctolnotningu-teedrmcagprtouurendowf saitteergleroveulnmdwonatietorring to Cohufomonnda-unscihtteeloapnlotghta-btelremwgerllotuonednwsautreerpqruoatleictytimononoiftoring tCreoanttmineunetosypsetreamtion of MeCl seep collection and
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