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ATSDR Public Health Assessment Hazard Categories
A. Urgent publichealth hazard This category is used for sites that pose anurgent public health hazard as the result ofshort-term exposures to hazardoussubstances.
  • evidence exists that exposures have occurred, are occurring, orare likely to occur in the future AND
  • estimated exposures are to a substance(s) at concentrations in theenvironment that, upon short-term exposures, can cause adversehealth effects to any segment of the receptor population AND/OR
  • community-specific health outcome data indicate that the site hashad an adverse impact on human health that requires rapidintervention AND/OR
  • physical hazards at the site pose an imminent risk of physicalinjury
  • B. Public health hazardThis category is used for sites that pose apublic health hazard as the result of long-term exposures to hazardous substances.
  • evidence exists that exposures have occurred, are occurring, orare likely to occur in the future AND
  • estimated exposures are to a substance(s) at concentrations in theenvironment that, upon long-term exposures, can cause adversehealth effects to any segment of the receptor population AND/OR
  • community-specific health outcome data indicate that the site hashad an adverse impact on human health that requires intervention
  • C. Indeterminate(potential) publichealth hazardThis category is used for sites withincomplete information.
  • limited available data do not indicate that humans are being orhave been exposed to levels of contamination that would beexpected to cause adverse health effects; data or information arenot available for all environmental media to which humans may be exposed AND
  • there are insufficient or no community-specific health outcomedata to indicate that the site has had an adverse impact on humanhealth
  • D. No apparent publichealth hazardThis category is used for sites where humanexposure to contaminated media isoccurring, has occurred in the past, (orcould occur in the future), but the exposureis below, (or expected to be below), a levelof health hazard.
  • exposures do not exceed an ATSDR chronic MRL or othercomparable value
  • data are available for all environmental media to which humansare being exposed AND
  • there are no community-specific health outcome data to indicatethat the site has had an adverse impact on human health
  • E. No public healthhazardThis category is used for sites that do notpose a public health hazard.
  • no evidence of current or past human exposure to contaminatedmedia
  • future exposures to contaminated media are not likely to occur
  • there are no community-specific health outcome data to indicatethat the site has had an adverse impact on human health


    List of Installation Restoration Program (IRP) and Underground Storage Tank Program (USTP)
    Sites at NAS Patuxent River
    1Fishing Point Landfill26Red Hill Area
    2Disposal Site at Pond 127Construction Debris Disposal Area
    3Disposal Site at Goose Creek28Transformer Storage Area
    4Hermanville Disposal Site29Carbon Tetrachloride Spill
    5Disposal Site Near Pine Hill Run30Paint and Solvent Locker, Bldg. 863
    6Bohneyard31Tire Shop, Bldg. 307
    7Fuel Farm34Drum Disposal Area
    8Supply Pond35Agricultural Area
    9Former Drum Disposal Area36Waste Battery Storage, Bldg. 214
    10Ordnance Disposal at Strike37Sandblasting Area, Bldg. 214
    11Former Sanitary Landfill38Scrap Storage, Bldg. 1811
    12Landfill Behind Rifle Range39Waste PCE Storage Area, Bldg. 503
    13Transformer Spill, Bldg. 58540Construction Debris Landfill, Strike Area
    14Old Firefighter Burn Area41Burn Pad
    15Washrack, Drainage Way, Bldgs. 110,11142Coal Disposal Area, Bldg. 604
    16Drainage Ditch, Bldgs. 305, 30643Solid, Liquid Waste Disposal Area
    17Pesticide Shop, Bldg. 84144Fill Area
    18Hobby Shop, Bldg. 41545Disposal Area
    19Drainage Ditch, Bldgs. 101, 10946Liquid Spill/Disposal Area
    20Battery Shop, Bldg. 15847Drywell, Bldg. 1354
    21Sludge Drying Beds 48Water Tower
    22Washrack, Bldgs. 115, 20149Water Tower


    DRMO Salvage Yard50Water Tower
    24Dry Well, Bldg. 11452Communication Towers
    25Solvent Spill, Bldg. 11453Waste Flammable Storage, Bldg. 1811
    Sites 7, 8, 10, and 26 are now under the UST Program and have been removed from the IRP List.
    Sites 32, 33, and 51 were removed from the IRP list and are not included above.


    Ingestion Rate Calculations for Pond 3:

    RMCR = (R x BW x 365 x ET) / (CSF x C x IR x ED)

    R = risk 1 x 10-5
    BW = body weight 70 kg
    ET = exposure time 70 years
    CSF = cancer slope factor (PCBs) 4.95 kg-day/mg
    C = concentration of contaminant 0.116 mg/kg
    IR = ingestion rate 0.228 kg/meal
    ED = exposure duration 7 years
    RMCR = recommended maximum consumption rate meals/year
    RMCR = (1 x 10-5 x 70 x 365 x 70) / (4.95 x 0.116 x 0.228 x 7)

    =    19 meals/year

    As stated in demographic information in the Background section, the median residency of headsof households are as follows: Lexington Park census tract, 2.1 years; NAS Patuxent River censustract, 5.0 years; and St. Mary's County, 5.4 years. Using this information as a guide, we selected7 years as a reasonable exposure duration. Only persons associated with NAS Patuxent Rivermay fish the ponds, and they must obtain permits through the Department of Natural Resourceson base. Educational materials are handed out with the permits including size, creel, andconsumption limits. A consumption limit of 19 fish meals/year for no more than 7 years and thealternative, a lifetime consumption limit of 133 fish meals, can be easily conveyed to NASPatuxent River's fishing constituency.


    Site Name: Number
    Site Description
    Waste DisposalHistoryContaminatedMediaStatus ofRemediationATSDR Evaluation
    Site 1: FishingPoint Landfill :
    25-acre landfillalong rivershoreline near bay.
    Main disposal areafor facility from1960 to 1974, solidand liquid wastes.Groundwater, soils -contaminated withVOCs, pesticides.IAS, CS, and IRIcompleted;ground- watermonitored;
    Site is posted;capping willprevent exposureand containpossiblecontamination.
    Site 2: DisposalSite at Pond 1:
    Wastes disposed ofalong part of Pond1 shoreline.
    Misc. stationwastes,construction debris,liquid waste indrums from time of1942-43construction offacility. Groundwater, soils -low levels oforganics, metals
    Fish, sediment - lowlevels of DDD,DDE, DDT, metals.
    IRI completed;Site awaits furtherstudy or cleanup.Contaminantconcentrations arelow; there is aconsumption limiton fish; noexposures areexpected.
    Site 3: DisposalSite at GooseCreek:
    Landfill (short-term).
    Main disposal sitefor facility for 6months in 1960;IAS revealednontoxic wasteonly.None known.Confirmationstudy notrecommended.Site is posted;contam- ination hasnot been detected,thus no exposuresare expected.
    Site 4: HermanvilleDisposal Site:
    8-acre landfillsouth of Pine HillRun.
    Main disposal areafor facility from1943 to 1960; solidand liquid wastes.Groundwater, soils -low levels oforganics, metals.IAS, IRIcompleted;capping,restriction ofaccesscontemplated;
    RI/FS scheduled.
    Site is posted;exposures tocontaminated soilsare not likely.
    Site 5: DisposalArea Near Pine HillRun:
    2-acre disposal sitewest of Pine HillRun.
    Data on history lacking; IASrevealed rustingvehicles, vehicleparts, misc. scrapmetal.None known.IAS revealed nopetroleumproducts in wateror soil; CS notrecommended;RI/FS isscheduled.Contamination hasnot been detected,thus no exposuresare expected; site isposted due tophysical hazards.
    Site 6: Bohneyard:
    5-acre disposal areasouth of BohneRoad.
    Ash from coal-firedpower plant, liquidwastes in drums,scrap metal.Soil - petroleumwastes, metals,PCBs, VOCs.IAS,CS, andEE/CA have beencompleted; RI/FSis planned.Site is access isrestricted; exposureis limited.
    Site 7: Fuel Farm and Site 8: Supply Pond are now under the UST Program and have been removed from theIRP List.
    Site 9: FormerDrum DisposalArea:
    5-acre siteimmediatelynorthwest of Site 6.
    Scrap metal, drums,asphalt-likesubstance, Soil - low levels ofVOCs and otherorganics. IAS, partial CS,and SSIcompleted; RI/FSscheduled.Access is restricted,which preventsinjury fromphysical hazards.
    Site 10: Ordnance Disposal at Strike is now under the UST Program and has been removed from the IRP List
    Site 11: FormerSanitary Landfill:
    6.5 acre landfillnear the southernboundary of theinstallation.
    Main disposal areafor the facility from1974 to 1980; trash,oil-contaminatedsoil, and liquidwaste.Groundwater, Soils -low levels of VOCs,metals.IAS, CS, and IRIcompleted;permanent capinstalled duringIRA; RI/FS isscheduled.The site is fencedand posted; the capon the site preventscontact withcontaminants, sothere is noexposure.
    Site 12: LandfillBehind RifleRange:
    2-acre landfillsouth of FishingPoint.
    Trash andconstruction debriswas disposed offrom mid 1950s to1960 None known.IAS completed;CS deemedunnecessary;RI/FS isscheduled.The site is posted;contamination hasnot been detected,thus no exposuresare expected.
    Site 13:Transformer Spill:
    Within Bldg. 585 inCarpenter Park.
    One to five gallonsof PCBs leakedfrom storedtransformers.Transformer-fluidspill was containedon concrete floor.Bulk of spilledfluid was cleanedup. Need for furthercleanup is to beassessed.Only basepersonnel haveaccess to the spillarea. No exposuresare expected.
    Site 14: FirefighterBurn Area:
    Paved area nearEcho Southtaxiway.
    Petroleum productburns wereconducted forfirefighting practicefrom 1943 to ca.1955.Burning was doneon a concrete pad;no evidence of sitestaining or stressedvegetation.None deemednecessary.The burnedmaterials left littleor no residue. Noexposures areexpected.
    Site 15: FormerWash- rackDrainage Way/Bldgs. 110 & 111:
    Drainage ditchfrom aircraftwashrack to EastPatuxent Basin.
    Rinseate fromTurco used foraircraft cleaningfrom 1943 to 1970was drained to EastPatuxent Basin. Soils in ditch,sediments in Basinmay containpetroleum derivedcontaminants.A storm-waterdrainage systemwas installed in1970, eliminatinguse of the ditch. An oil/waterseparator wasinstalled in 1976.A ConfirmationStudy producedanalytical dataindicating no healthhazard due to soilsor sediments.
    Site 16: DrainageDitch South ofBuildings 305 &306:
    Ditch extendingfrom washracks toPond 1.
    Rinseate fromTurco used foraircraft cleaningfrom 1943 to 1976was drained toPond 1.Soils in ditch,sediments in Pond1 may becontaminated, butto a smaller extentthan for Site 15.Based oncomparison to Site15, no furtheraction was deemednecessary.Based on evidencefrom the Site 15ConfirmationStudy, noexposures areexpected.
    Site 17: PesticideShop:
    Site at theintersection of Tateand Payne Roadsused for pesticidestorage and mixing.
    300 to 400 gallonsof pesticide-formulationrinseate wasdisposed of per dayon this site from1943 to 1976.Soils arecontaminated withsignificantconcentrations oforganochlorine,organo-phosphorous andother classes ofpesticides.Soil adjacent to thebuilding and in thedrainage ditchextending towardPond 3 wasremoved andhauled to a RCRALandfill. The site is fencedand posted todiscourage trespass;no exposures areexpected.
    Site 18: HobbyShop:
    The interior ofBldg. 415, used fora variety of leisurepursuits.
    This site was usedfrom 1943 to 1971for hobby projects,some of whichrequired solvents.None known.IAS was conductedand showed nocontam- ination.No exposures areexpected.
    Site 19: DrainageDitch, Bldgs. 101& 109:
    A washrack ditchbetween Bldgs. 101& 109 and Pond 3.
    An activity similarto that at Site 15was operated herefrom 1943-1976;the scale of workwas less than forSite 15. None knownThe ConfirmationStudy for Site 15indicated no healthhazard, so no CSwas required forSite 19.No exposure isexpected.
    Site 20: BatteryShop:
    An area in Bldg.158 where acid wasremoved frombatteries.
    From 1960-1975battery acid wasdisposed of into aleaching field nextto Bldg. 158.Soil wascontaminated with~375 gallons ofbattery acid,naturally diluted bygroundwater.IAS wascompleted, CS notrequired. An RI/FSis scheduled.No exposure isexpected.
    Site 21: SludgeDrying Beds:
    Presently vegetatedarea near Bldg. 600
    Sewer sludge wasdried here fromabout 1945 to 1970. Dried sludge wastaken to thelandfill.None known.IAS wascompleted, CS notrequired; dryingbeds were removedin the 1980s,vegetation hasreturned. No exposure isexpected
    Site 22: Washracksand Bowser, Bldg.115, 201:
    Washracks athangars.
    Much like Site 19.None known.No CS required.No exposure isexpected.
    Site 23: DMROSalvage Yard:
    A salvage yardbetween Bldg. 604and the WestPatuxent Basin.
    Salvaged materialshere from 1961-1971 leaked VOCs,paints, and acidsfrom time to time. Possiblegroundwatercontamination.IAS, CF, IRIcompleted. AnRI/FS is scheduled.The site is paved sothat direct contactwith anycontaminants is nota risk.
    Site 24: Dry Well:
    Dry well near Bldg.114
    Rinse waters fromplating operationswere dischargedinto the dry wellfrom 1943-1970.Groundwater andsurface water;rainwater passesfrom dry well to astream that emptiesinto the bay. Drywell samplinghas showncontamination withmetals, etc.; thewell and nearbysoil have beenexcavated.Site access will berestricted whilecontam- inationremains incom-pletelycharacterized,preventingexposure.
    Site 25: SolventDispo- sal Area,Bldg. 114:
    Open area behindBldg. 114.
    Paint wastes andsolvents weredisposed of herefrom 1943-1975.None known.A CS revealed noresidualcontamination ofVOCs or TOCs.Contamination hasnot been detected,thus no exposuresare expected.
    Site 26: Red Hill Area is now under the UST Program and has been removed from the IRP List.
    Site 27:ConstructionDebris DisposalArea:
    Former disposalarea.
    Construction debrisand rubble weredisposed of during1942-43.The IAS revealedno sign of debris inthe area.No CS needed; AnRI/FS is scheduled.Contamination hasnot been detected,thus no exposuresare expected.
    Site 28:TransformerStorage Area:
    An open area,currently in grass,south of PearyRoad.
    Transformers werestored here fromthe 1940s to 1973.Soils werecontaminated withPCB's.2300 tons ofcontaminated soilwas excavated anddisposed of in aTSCA-compliantlandfill. An RI/FSis scheduled.A clean-up level of10 ppm wasachieved in theremoval action. This level poses nohealth hazard.
    Site 29: CarbonTetra- chlorideSpill, Bldg. 306:
    An open area, nowpaved, on theeastern side ofBldg. 306.
    In the late 1940slarge amounts ofCCl4 and JP-5 fuel-containing wasteoil were disposedof on the groundhere.Soils (oil, grease,metals, SVOCs),potentiallygroundwater,surface water. The site has beenpaved, providing abarrier tocontamination insoil; thegroundwater showslittle or nocontamination. Contamination islow and thepavement preventscontact with thesoil underneath. Nohealth risk exists.
    Site 30: Paint &Solvent Locker,Bldg. 863:
    A drainage ditchdischarging into theWest PatuxentBasin.
    A 1970 spill,identity and amountof materialunknown, wasreported.None known.IAS detected nosigns ofcontamination.Contamination hasnot been detected,so that no exposureis expected.
    Site 31: Tire Shop,Bldg. 307:
    A drainage ditchassociated with thesite discharges intothe West PatuxentBasin.
    From 1943 to 1970all cleaningcompounds(aliphatic napthas,MIBK, xylene, &toluene) weredrained into theWest PatuxentBasin.None known.The IAS revealedno visible signs ofcontamination. NoCS was done sinceSite 15 (similar)showed no threat tohuman healthNo exposure isexpected.
    Former Sites 32 and 33 have been removed from the IRP List.
    Site 34: DrumDisposal Site:
    Sand and gravelborrow pit next toSite 11.
    Undocumenteddumping of drumswas reported in thepast.Not known5 monitoring wellshave been installed,GW & soil sampleswere taken foranalysis; amagnetic surveywas conducted.RI/FS resultsawaited. This siteis fenced, posted,and patrolled; noexposure is likely.
    Site 35:Agricultural Area:
    Open land nearPine Hill Run.
    The site may havebeen used for coalstorage.Not known.Limited samplingand analysisindicates highlevels of organiccarbon, traces ofmetals.No apparent publichealth hazard; someadditional samplingis planned.
    Site 36: WasteBattery StorageBuilding 214:
    Jetty area nearChesapeake Basin.
    The jetty behindBldg. 214 was usedto hold batteriesbefore finaldisposal. None known.There are no visualsigns of releases.No apparent publichealth hazard.
    Site 37:Sandblasting Area, Bldg. 214:
    Near ChesapeakeBasin.
    Storage of a 55-gallon drum ofsandblasting waste.None known.There are no visualindications ofcontamination.No apparent publichealth hazard.
    Site 38: ScrapStorage Building1811:
    Near ChesapeakeBasin.
    Scrap metal, woodand styrofoam wasstored behind Bldg.1811 on a grassyarea.None known.The need for anyfurther work willbe reviewed.No chemical orphysical hazardappears to exist.
    Site 39: WastePerchloroethyleneStorage Area,Building 503:
    Near theintersection ofCedar Point andTate Roads.
    Perchloroethylene(TCE) was used atthe dry cleaningfacility.None known. Undergroundstorage tanks wereremoved, no TCEcontamination wasfound.No apparent publichealth hazard.
    Site 40:ConstructionDebris Landfill:
    Near ChesapeakeBasin
    Concrete,asphalt,and lumber weredisposed of tostabilize theshoreline.None known.No remediationwas considerednecessary.No apparent publichealth hazard.
    Site 41: Burn Pad:
    Former fire fightingtraining facility.
    Fires were set fortraining porposesfrom 1952 to 1991.Groundwater -contaminated withpetroleum.Free-floatingpetroleum ispumpedcontinually; furthersampling isplanned.This area,near arunway, isrestricted; noapparent publichealth hazardexists.
    Site 42: CoalDisposal AreaBldg. 604:
    Near Site 23.
    Possible coalstorage area forBldg. 604 boiler.None known.No action wastaken; Somefurther sampling isplanned.No exposure isexpected.
    Site 43: Solid andProbable LiquidWaste Disposal:
    Near Site 41.
    A probablespillway for dredgematerial from theEast PatuxentBasin.None known.No action taken.No exposure isexpected.
    Site 44: Fill Area:
    Located along theChesapeake Bay,south of Site 3.
    Possible fill areafrom 1957 to 1965.None known.No action taken.No exposure isexpected.
    Site 45: DisposalArea:
    Located at theintersection ofTaxiways A & B.
    Possible disposalarea from 1952 to1972.None known.Soil samplesanalyzed for TCL& TAL. Trencheswere dug to checkfor buried debris.The site is beingexcavated to builda new Jet EngineTest Cell Facility;no exposure isexpected.
    Site 46: LiquidSpill/DisposalArea:
    Located alongTaxiway A, southof Site 6.
    Possibleliquid/soliddisposal area from1957 to 1965. None known.No action taken;further samplingplanned.This area along thetaxiway isrestricted. Noexposures areexpected.
    Site 47: DrywellBldg. 1354:
    Located near CedarPoint Road.
    Possible disposal ofliquid photographicwastes.None known.No action taken;further samplingplanned.No exposure isexpected.
    Sites 48-50: WaterTowers:
    Located at severalpoints around thebase.
    The soil under thetanks may containlead-based paintchips.Possible soilcontamination withlead paint.No action taken.Exposure risk islow; thesestructures may beremoved from theIRP Site list.
    Former Site 51 has been removed from the IRP List.
    Site 52:CommunicationTowers:
    Located at variouspoints around thebase.
    The soil under thetowers may containlead-based paintchips.Possible soilcontamination withlead paint.No action taken.Exposure risk islow; thesestructures may beremoved from theIRP Site list.
    Site 53: FlammableWaste Storage,Bldg. 1811:
    Located at theChesapeake BayBasin.
    Waste fuels werereportedly stored in55 gallon drums onpallets in Bldg.1811.None known.No action taken; afurther review is planned.No exposure isexpected.

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