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EPA Region 5 RecoirdsCtr.Ill269590State of Ohio Environmental Protection AgencyStreet AddressMailing AddressLazarus Government Center122 South Front StreetColumbus, Ohio 43215TELE: (614)644-3020 FAX: (614)644-3184www.epa.state.oh.usP.O. Box 1049Columbus, Ohio 43216-1049June 30, 2006Mr. Jason El-Zein, ChiefE-mergency Response BranchU.S. EPA, Room 2169311 Groh RoadGrosse He, Ml 48138-1697RE: EAST TROY CONTAMINATED AQUIFER, MIAMI COUNTY, 555-1353Dear Mr. El-Zein:Ohio EPA requests U.S. EPA assistance in conducting a time-critical removal action at the EastTroy Contaninated Aquifer site, located east/southeast of downtown, Troy, Ohio. Ohio EPAinvestigations show that ground water is contaminated with tetrachlorothene (PCE) from two ormore sourcss. Wells within the Troy east well field have been impacted with volatile organiccompounds (VOCs) at concentrations below maximum contaminant levels (MCLs). PCE and otherVOCs have been detected in indoor air samples collected by the city of Troy from several occupiedstructures including the Troy police station, a church, and a school.Residences and other occupied structures above and adjacent to the ground water plumes are atrisk for exposure to VOCs through vapor intrusion from soil gas to indoor air. Ohio EPA requeststhat U.S. EPA conduct a removal action assessment to determine the extent of vapor intrusioncontaminatiDn and to mitigate levels of VOCs in indoor air that exceed removal action levelsestablished by the Agency for Toxic Substances and Disease Registry (ATSDR).Randy Watlerworth at the Ohio EPA Southwest District Office is the contact for this site and canbe reached at (937) 285-6062 or by email at randv.watterworth@epa.state.oh.us As always,please feel Free to call me at (614)836-8752 with any questions.Sincerely,Kevin Clous.e, Manager[Emergency Response & Special Investigations Unitcc:Cindy Hafner, Chief, DERRRandy Watterworth, DERR, SWDOenclosuresBob Taft, GovernorBruce Johnson, Lt. GovernorJoseph P. Koncelik, Director'rimed on Recycled PaperOhio EPA is an Equal Opportunity Employer
REMOVAL ACTION REFERRAL TO U.S. EPAI.SITE LOCATION AND RESPONSIBLE PARTY INFORMATIONA. SITE NAME: East Troy Contaminated AquiferB. ADDRESS/LOCATION: Southeast of downtown, Troy, Ohio 45373C. LATITUDE/LONGITUDE: North 40 02'17" West 84 11' 46"D. CURRENT OWNER/OPERATOR: N/AE. PAST OWNER(S)/OPERATOR(S): N/AII.ASSESSMENT OF ENVIRONMENTAL HAZARDS AND PROPOSEDRESPONSE ACTIONSA.DESCRIPTION OF ACTUAL OR POTENTIAL CHEMICAL/ PHYSICALHAZARDS POSED BY SITE:Ohio EPA has found tetrachloroethene (PCE) and other chlorinatedsolvents in ground water in a residential neighborhood southeast ofdowntown Troy, Ohio. Indoor air sampoles collected by the city of Troyindicate that PCE may be present in indoor air at harmful concentrations.The city also found other carcinogens in indoor air.B.LIST ACTUAL OR POTENTIAL HAZARD THAT MEETS ONE OR MOREOF THE REMOVAL RESPONSE CRITERIA OR EXCEEDS A REMOVALACTION LEVEL:1.Actual or potential exposure to [of] nearby human populations,animals, or the food chain from [to] hazardous substances orpollutants or contaminants from VOCs in ground water, soils andsoil vapor/indoor air.2.Actual or potential contamination of drinking water supplies orsensitive ecosystems from VOCs in ground water.3.Hazardous substances or pollutants or contaminants in drums,barrels, tanks, or other bulk storage containers that may pose athreat of release; N/A4.High levels of hazardous substances or pollutants or contaminantsin soils largely at or near the surface that may migrate: VOCs in1
soil and ground water. Vapors from VOCs in ground water may boaffecting structures by vapor intrusion to indoor air.C.5.Weather conditions that may cause hazardous substances orpollutants or contaminants to migrate or be released: Precipitationis causing VOCs to leach from soils to ground water.6.Threat of fire or explosion: N/A7.The [lack of] availability of other appropriate Federal or Stateresponse mechanisms to respond to the release: Ohio EPAconsiders a U.S. EPA removal action to be the most expedientmeans of addressing VOC vapors.8.Other situations or factors that may pose threats to public health orwelfare or the environment. N/ADESCRIPTION OF RESPONSE ACTIONS THAT SHOULD BEUNDERTAKEN TO REDUCE OR ELIMINATE HAZARDSThe city's data suggests that PCE may be present in indoor air at harmfulconcentrations. The city's samples also show other carcinogens presentin indoor air. Ohio EPA recommends that a removal action assessmentbe conducted and if concentrations exceed removal action levels, actionbe taken to mitigate indoor air contaminants.D.EXTENUATING OR MITIGATING CIRCUMSTANCESThe contamination is most likely due to disposal practices by one or moreformer dry cleaning operations. The financial status of the owners ofthese former dry cleaners is unknown at this time but is likely to limittraditional enforcement.SITE DESCRIPTION AND BACKGROUND INFORMATIONA.SITE HISTORY AND OPERATIONS:Description of past or present operations and how wastes weregenerated, managed, and disposed: UnknownDescription of regulatory information (e.g., compliance issues, permits,regulated substances): UnknownDescription of past releases (e.g., substances, locations, impacts):
Ground-water data suggests that releases of PCE has occurred along ornear East Water Street and the south side of East Main Street, near thetraffic circle.B.SITE CHARACTERISTICS:Site layout: The area of concern is bounded to the north by the GreatMiami River, to the east by Union Street, to the south by Canal Street, andto the west by Market Street.Estimate of quantity, type and location of wastes and/or hazardoussubstances: unknownSubstances present: PCE, TCE, 1,1,1-TCA, cis-1,2-DCE, and vinylchloride.Evidence of releases: Ohio EPA has found chlorinated solvents in soil,soil gas, and ground water. The city has found chlorinated solvents andother solvents in indoor air.Analytical data or other documentation on chemical characterization ofwastes and contamination present: Ohio EPA has extensivedocumentation of chemical contamination from its investigations.IV.THREATS TO PUBLIC HEALTH AND THE ENVIRONMENTA.POTENTIAL HUMAN AND ECOLOGICAL RECEPTORS:Population density within a one mile radius: 1000Nearby land uses: commercial, industrial, recreational, residentialPublic accessibility: ongoing exposure to vaporsDistance to possible human and ecological receptors: approximately 15feet from the water table to the ground surface.Locations of drinking water and monitoring wells (on site/immediatevicinity): The city operates five drinking water wells downgradient from the;area of concern. The distance varies but the nearest well is less than a1/4 mile away. There are Ohio EPA has installed 12 monitoring wells inthe area. There are also approximately 30 monitoring wells at theSpinnaker Coating facility on East Water Street.Locations of surface water bodies (e.g., ponds, streams) and wetlands:The Great Miami River runs along the northern border of the area ofconcern.
Above ground and underground drainage channels or pathways (e.g.,ditches, storm sewers, utilities): There are is urban and there are manyburied utilities.Blowing soils and air contaminants: Most of the area is either paved,covered with structures, or covered with vegetation.V.CHRONOLOGY OF REMOVAL ACTION EVENTSN/AVI.VII.INDEX OF DOCUMENTS AND PHOTOGRAPHS1.Site Location Map2.Map showing ground-water sampling results3.Map showing soil gas, indoor air, and ground-water sampling results from2006.4.2002 ESI ReportCONTACTSDistrict Office Contacts:Stejve MartinRandy WatterworthVIII.Office Phone - 937-285-6037Facsimile - 937-285-6404Email - steve.martin@epa.state.oh.usOffice Phone - 937-285-6062Facsimile - 937-285-6404Email - ed by (type name and title):Date:Stcjve Martin, Site CoordinatorApproved by (type name,, and title):Date:Jeff RjfT , Assistant Ch f, SWDO//
Figure 1. Site Location13o City production wellFrom USGS Troy Quadrangle0.52H Miles
OhnEI*East Troy Soil-Gas, Indoor Air & Monitoring Well Results for PCEJanuary 20062001000200*Monitoring well (ug/l)Soil gas (ppb)400ISIndoor air (ppb)e
Ground-Water Sampling Results for PCEConcentrations in ug/lOhtoEFftDirect-push boring (2002) ยป Geoprobe (2003) I'Geoprobe (2004)*Monitoring well0
Columbus, Ohio 43215 June 30, 2006 Mr. Jason El-Zein, Chief E-mergency Response Branch U.S. EPA, Room 216 9311 Groh Road Grosse He, Ml 48138-1697 RE: EAST TROY CONTAMINATED AQUIFER, MIAMI COUNTY, 555-1353 Dear Mr. El-Zein: Ohio EPA requests U.S. EPA assistance in conducting a time-critical removal action at the East
