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PUBLIC HEALTH ASSESSMENT

USAF ROBINS AIR FORCE BASE (LANDFILL/SLUDGE LA)
(a/k/a USAF ROBINS AIR FORCE BASE)
WARNER ROBINS, HOUSTON COUNTY, GEORGIA


APPENDIX A: ACRONYMS AND ABBREVIATIONS

AFB air force base
AOC area(s) of concern
ATSDR Agency for Toxic Substances and Disease Registry
BTEX benzene, toluene, ethlybenzene and xylene, fuel components
CAP Closure Action Plan
CERCLA Comprehensive Environmental, Response, Compensation and Liability Act, 1980
CREG Cancer Risk Evaluation Guide

DCA

dichloroethane
DCE dichloroethene
DOD U.S. Department of Defense
EMEG Environmental Media Evaluation Guides
EPA U.S. Environmental Protection Agency
IWTP Industrial Wastewater Treatment Plant
IRP Installation Restoration Program
JP aviation fuel designation

MCL

maximum contaminant level
mg/kg milligram per kilogram
µg/kg microgram per kilogram
µg/L microgram per liter
µg/m3 microgram per square meter
ml milli-liter
mr/hr millirem per hour
MRL minimum response level
MW monitoring well

ND

not detected
NIOSH National Institute for Occupational Safety and Health
NPL National Priorities List
OU operable unit
PA preliminary assessment
PAH polycyclic aromatic hydrocarbons
PCB polychlorinated biphenyl
pCi/g picoCuries per gram
ppb parts per billion
ppbv parts per billion volume
PHA Public Health Assessment
RAFB Robins Air Force Base
RfD reference dose
RFI Restoration Feasibility Investigation
RI Remedial Investigation
RMEG Reference Media Evaluation Guide
ROD Record of Decision
SVOC semivolatile organic compound
TCE trichloroethylene
TPH total petroleum hydrocarbon
UST underground storage tank
VOC volatile organic compound


APPENDIX B: SUMMARY OF WASTE AREAS
Ref: (5)

SitesIRP #SiteDescriptionContaminantsMediaCorrective ActivitiesATSDR's Evaluation of Public HealthHazards
LF01Landfillconstruction debris,municipal waste (solvents,metals)soilRCRA RFI-II, remedial action (removal of wastematerial) - submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Site contaminants not detected in groundwater
LF02Landfillmunicipal/industrial waste (solvents, metals), pesticides,fuels (from FT05 withinboundaries)soil, potential surface water,sediment/ groundwaterRFI-II, CAP - submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
- Groundwater cleanup addressed in base wide plan
LF03Landfillmunicipal/industrial waste(paint, solvents, metals)soil, potential runoff/groundwater/biotaCAP - Interim measures, remedial action (wasteencapsulation) - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
LF04Landfillmunicipal/industrial waste(solvents, metals)soil, surface water, sedimentand groundwaterNPL site - remedial action (fencing, groundwaterextraction, leachate collection and treatment, run-oncontrol, capping) - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
FT05Fire training areawaste oil, fuels, solventssoil, potential surface water,sediment/ groundwaterRFI - submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater cleanup addressed in base wide plan
FT06Fire training areawaste oil, fuel, solventssoil, potential surface water,sediment/ groundwaterwaste encapsulation, submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater cleanup addressed in base wide plan
FT07Fire training areawaste oil, fuel, solvents groundwater, potentialsurface water, sedimentsubmitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
- Groundwater cleanup addressed in base wide plan
FT08Fire training areawaste oil, fuel, solventsgroundwater, potentialsurface water, sedimentsoil removal, submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
- Groundwater cleanup addressed in base wide plan
SS09DDT spill siteDDT, dieldrin, chlordanesoil, surface water, sedimentsoil removal, submitted for closure/approvedGAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Site contaminants not detected in groundwater
SS10JP4 spill sitefuel and fuel componentssoil, groundwaterRFI-II, CAP, interim measure, remedial action(bioventing, free product removal) - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
SS11PCB spill sitePCBsoil, potential surface water,sediment/groundwatersoil removal, submitted for closure/approvedGAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Site contaminants not detected in groundwater
- Groundwater cleanup addressed in base wide plan
WP12Hazardous wastedisposal siteDDT with pyrethrin,mercury, PCBsoilhazardous waste removal, submitted forclosure/approved GAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
- Site contaminants not detected in groundwater
WP13Lab chemicaldisposal area(LCDA)off specification labchemicalssoil, potential surface water,sediment/groundwatersubmitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
- Remediation as a part of LF03.
WP14Sludge lagoonIndustrial waste/sludge fromIWTPsoil, surface water, sediment,groundwaterNPL site, remedial action (waste encapsulation) - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
RW15Low levelradioactive wastedisposalradioactive material, VOCs,SVOCspotential soil/ groundwaterRFI, remedial action (waste removal) - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Site contaminants not detected in groundwater
OT16Well #8TCEgroundwaterwell closed, submitted for closure/approvedGAEPD - Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
OT17Bldg 645TCEgroundwaterRFI, wells closed - Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
LF18 landfillConstruction debrispotential soil/ surface water,sediment/groundwatersubmitted for closure/approved GAEPD- No contaminants found
LF19 landfillConstruction debrispotential soil/ surface water,sediment/groundwatersubmitted for closure/approved GAEPD- Low levels of contaminants detected do not appear representrelease form site.
OT20Base industrialareaTCE, other VOCsgroundwaterRFI-II, CAP, Interim measures (groundwaterextraction system) - Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
OT21Bldg 80,corrosion controlfacilityTCEgroundwatersubmitted for closure/approved GAEPD- Groundwater not used, no exposure possible
OT22 Satellite storageareaPAH, construction debris soilRFI-II, removal of contaminated material, submittedfor closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Site contaminants not detected in groundwater
OT23Sanitary sludgeplacement areasewage treatment sludge,VOCs, metalssoil, potential groundwaterRFI-II, submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
- Groundwater cleanup addressed in base wide plan
- Groundwater contamination believed to be from offsite source.
ST24 UST remediation,bldg 303fuels, oilgroundwaterTanks removed, submitted for closure - Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
OT25Pasture disposalareadomestic/construction debrispotential soil/ groundwatersubmitted for closure/approved GAEPD- No contaminants detected
OT26Off-base drumdisposal siteempty drumspotential soil/groundwaterdebris removal, submitted for closure/approvedGAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
- The only metals detected in soils sampling were from deteriorating containers. No significant levels of contaminants detected in soil sampling.
OT27Dump site, GasLine Rdempty drumspotential soil/groundwaterdebris removal, submitted for closure/approvedGAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
- The only metals detected in soils sampling were from deteriorating containers. No significant levels of contaminants detected in soil sampling.
SS28Bldg 45 purgefluid leakpurge fluid, fuelsoil, potential groundwatersoil removal, submitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
OT29Duck LakeDDT, dieldrin, chlordanesurface water, sediment,biotaCAP, remedial action, (lake drained, DDT removalupstream, biota replacement, sediment removal) - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
ST30UST remediationbldg. 272diesel fuelsoil, groundwatersubmitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
ST31UST remediationbldg. 45diesel fuelsoil, groundwatersubmitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
ST32 UST remediationbldg.173diesel fuelsoil, groundwatersubmitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
ST 33UST remediationbldg. 181diesel fuelsoil, groundwatersubmitted for closure - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
DC34Horse pasturedisposal Areadrumspotential soil/groundwaterPA- Sampling and analyses underway
AOC1SAC drum sitedrums soil/ potential groundwatersubmitted for closure/approved GAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
AOC2WSA weaponstorage areapesticides, drums soil/potential groundwaterPA, submitted for closure/approved GAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
AOC3AFFF lagoonfire-fighting foam, petroleumpotential soil/surface water,sediment/ groundwaterPA, submitted for closure/approved GAEPD - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
- No contamination found at site
AOC4Horse pasturetrench disposalsitedrumpotential soil/groundwaterPA. RFI- Sampling and analyses underway
AOC5AOC nearTaxiway no. 4BTEX, possible TCEpotential soil/ groundwaterPA, RFI - Levels detected are below acute hazard level
- Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Groundwater not used, no exposure possible
- Source is located outside RAFB. (GAEPD is undertaking to mitigate and rectify)
AOC6Bldgs 70 & 72BTEXsoil, potential groundwaterPA, removal of free product, CAP - Any likely exposure to low levels would be incidental and not likely to present long-term hazard
- Remediation has reduced likely exposure
- Groundwater not used, no exposure possible
AOC7Bldg. 670solvents, metalssoil, potential groundwaterPA- Sampling and analyses underway. Area not immediatelyaccessible to casual access
AOC8(SWMU53)Storm drainculvert from BIAto LF02 outfallsolvents, metalsgroundwater, surface water PA- Sampling and analyses underway. Area not immediatelyaccessible to casual access.
AOC9(SWMU54)Area around bldg141 &142solvents, acids, metalssoil, potential groundwaterPA- Sampling and analyses planned. Area not immediatelyaccessible to casual access.
AOC10(SWMU55)Monitoring wellsRB20-MW6,RB20-MW6D,surrounding areasolvents, fuelssoil, groundwaterPA - Remediation has reduced likely exposure
- Sampling and analyses planned. Area not immediately accessible to casual access.
AOC11(SWMU56)Formerbldg.145/jetenginemaintenance arealubricants, solventssoil, potential groundwaterPA- Sampling and analyses planned. Area not immediatelyaccessible to casual access.
AOC12(SWMU57)Undergroundstorm drainculvertsolvents, metalssurface waterPA- Sampling and analyses planned Area not immediatelyaccessible to casual access.
AOC13(SWMU58)Area aroundstorm drainculvert and outfallnear FT03solvents, metals, possibleBTEXsoil, surface water, potentialgroundwaterPA- Sampling and analyses planned Area not immediatelyaccessible to casual access.



APPENDIX C: ATSDR PUBLIC HEALTH CONCLUSION CATEGORIES

Category Definition Criteria
A. Urgent public health hazard This category is used for sites that pose an urgent public health hazard as the result of short-term exposures to hazardous substances.
  • evidence exists that exposures have occurred, are occurring, or are likely to occur in the future AND
  • •estimated exposures are to a substance(s) at concentrations in the environment that, upon short-term exposures, can cause adverse health effects to any segment of the receptor population AND/OR
  • community-specific health outcome data indicate that the site has had an adverse impact on human health that requires rapid intervention AND/OR
  • physical hazards at the site pose an imminent risk of physical injury
B. Public health hazard This category is used for sites that pose a public health hazard as the result of long-term exposures to hazardous substances.
  • evidence exists that exposures have occurred, are occurring, or are likely to occur in the future AND
  • estimated exposures are to a substance(s) at concentrations in the environment that, upon long-term exposures, can cause adverse health effects to any segment of the receptor population AND/OR
  • community-specific health outcome data indicate that the site has had an adverse impact on human health that requires intervention
C. Potential (indeterminate) public health hazard This category is used for sites with incomplete information.
  • limited available data do not indicate that humans are being or have been exposed to levels of contamination that would be expected to cause adverse health effects; data or information are not available for all environmental media to which humans may be exposed AND
  • there are insufficient or no community-specific health outcome data to indicate that the site has had an adverse impact on human health
D. No apparent public health hazard This category is used for sites where human exposure to contaminated media is occurring or has occurred in the past, but the exposure is below a level of health hazard.
  • exposures do not exceed an ATSDR chronic MRL or other comparable value AND
  • data are available for all environmental media to which humans are being exposed AND
  • there are no community-specific health outcome data to indicate that the site has had an adverse impact on human health
E. No public health hazard This category is used for sites that do not pose a public health hazard.
  • no evidence of current or past human exposure to contaminated media AND
  • future exposures to contaminated media are not likely to occur AND
  • there are no community-specific health outcome data to indicate that the site has had an adverse impact on human health



APPENDIX D: DATA TABLES

Table D-1: Radiological Contamination of Groundwater at RW15.(5)

Contaminant Maximum Detection
Gross Alpha 120 pCi/L
Gross Beta 58 pCi/L
Gamma Ray 46 pCi/L


Table D-2: Radiological Contamination of Soil at RW15

Contaminant Maximum Concentration
Gross Alpha 26 pCi/g
Gross Beta 27 pCi/g
Potassium40 1.82 pCi/g
Cesium137 1.59 pCi/g
Uranium238 1.88 pCi/g
Radium 226 1.66 pCi/g
Thorium232 2.40 pCi/g
Cobalt60 0.07 pCi/g
 


Table D-3. Chemicals that Exceed ATSDR's Comparison Values in Drinking Water at Robins AFB

Chemical Concentration (ppb)ATSDRComparisonValue (ppb)Date DetectedLocation Detected
Bromodichloromethane0.6 0.6CREG

700 EMEG
© Adult

200 EMEG
© Child

7/17/89Sample Location 000
0.77/17/89Sample Location 0168Pa100
0.85/16/88Tap in Treatment Building 174 - Well

Fluoride Room Well #5

1.27/17/89

5/16/88

Well house well #7

Outside Well House Well #4

Chlorodibromomethane0.6 0.4 CREG

1,000 EMEG
© Adult

300 EMEG
© Child

5/16/88Fluoride Room Well #8
0.75/16/89Fluoride Room Well #5
1.17/17/89Sample Location 0168Pa100
1.87/17/89Sample Location 000
Trichloroethylene4.0
3 CREG
5/16/88Tap - Fluoride Room Well #3
4.25/16/88Tap - Fluoride Room Well #3
4.45/16/88Fluoride Room Well #8
28.77/17/89Well 14 (raw)

CREG = Cancer Risk Evaluation Guide for 1 x 10-6 excess cancer risk.
EMEG = Environmental Media Evaluation Guide (ATSDR).
© = Chronic


Table D-4. Fish Tissue Data for Duck Lake

Chemical Maximum (ppm) Average (ppm) FDA Action Level (ppm) EPA Region III RBC (ppm) Adult Non-Cancer Dose (mg/kg/day)1 Child Non-Cancer Dose (mg/kg/day)1 MRL/RFD Cancer Slope Factor Cancer Risk (mg/kg/day)
Metals
Arsenic 5.5 1.376 NA 0.41 (NC),
0.0021©
5.1 x 10-4 3.6 x 10-3 3 x 10-4 1.5 3 x 10-4
Barium 5.6 0.906 NA 95 (NC) - - - - -
Cadmium 1.8 0.590 NA 0.68 (NC) 1.7 x 10-4 1.0 x 10-3 2 x 10-4 - -
Chromium 1.6 0.694 NA 6.8 (NC) - - - - -
Lead 2.8 2.8 NA NA - - - - -
Mercury 0.73 0.158 NA 0.41(NC) 6.8 x 10-5 4.8 x 10-4 NA - -
Selenium 1.37 0.359 NA 6.8 (NC) - - - - -
Silver 1.6 1.6 NA 6.8 (NC) - - - - -
Pesticides/PCBs
Aldrin 0.0107 0.005 0.3 0.00019 © 9.9 x 10-7 7.0 x 10-6 3.0 x 10-5 17 7 x 10-6
alpha-BHC 0.004 0.002 NA NA 3.7 x 10-7 2.6 x 10-6 1.0 x 10-2 - -
beta-BHC 0.0004 0.0004 NA NA 3.7 x 10-8 2.6 x 10-7 6.0 x 10-4 2 - -
Chlordane 0.29 0.247 0.3 0.0024 © 2.7 x 10-5 1.9 x 10-4 6.0 x 10-4 2 1.3 2 x 10-5
4,4-DDD 0.168 0.037 5.0 0.013 © 1.6 x 10-5 1.1 x 10-4 5.0 x 10-4 0.24 2 x 10-6
4,4-DDE 0.57 0.085 5.0 0.0093 © 5.3 x 10-5 3.7 x 10-4 5.0 x 10-4 0.34 7 x 10-6
4,4-DDT 0.028 0.008 5.0 0.0093 © 2.6 x 10-6 1.8 x 10-5 5.0 x 10-4 0.34 4 x 10-7
Dieldrin 0.10 0.008 0.3 0.0002 © 9.3 x 10-6 6.5 x 10-5 5.0 x 10-5 16 6 x 10-5
Endosulfan I 0.0022 0.001 NA 8.1 (NC) - - - - -
Heptachlor 0.012 0.004 0.3 0.0007 © 1.1 x 10-6 7.8 x 10-6 5.0 x 10-4 4.5 2 x 10-6
PCB-1254 0.54 0.234 2.03 0.027 (NC) 5.0 x 10-5 3.5 x 10-4 2.0 x 10-5 - -
PCB-1260 1.02 0.466 2.03 0.001634 (NC) 9.5 x 10-5 6.6 x 10-4 2.0 x 10-5 - -

1 Dose = Conc. x IR x FI x EF x ED
                              BW x AT

where
Conc. = Maximum concentration detected (mg/kg)
IR = Ingestion rate = 0.0065 kg/daily intake averaged over a year (EPA 1989)
FI = Fraction ingested (assumed 100%)
EF = Exposure frequency or number of exposure events = 365 days/year
ED = Exposure duration over which exposure occurs = 30 years (adult) and 6 years (child)
BW = Body weight = 70 kg (adult) and 10 kg (child)
AT = Averaging time (the time period over which cumulative exposures are averaged); noncancer =ED x 365 days/year, cancer=70 years x 365 days per year).

2 The MRL (oral, intermediate) for 4,4-DDT was used as a surrogate value for 4,4-DDD and 4,4 -DDE.
3 These levels represent tolerance rather than guidance or action levels.
4 General value for PCBs (i.e., not specific for PCB-1260).
5 The MRL for PCB-1254 was used as a surrogate value for PCB-1260
NA = not available
NC = noncancer effects
C = carcinogenic effects
Analytical results show that for arsenic, both the adult and child noncancer doses are slightly above the chronic oral MRL and that the estimated adult excess cancer risk is 3 x 10-4. The child noncancer doses for PCB-1254 and PCB-1260 are also slightly (up to one order of magnitude) above the chronic oral MRL. All other noncancer doses were below the corresponding MRL or RfD and cancer risks were between 2 x 10-5 to 7 x 10-6.


Table D-5. Fish Tissue Data from Wetlands Area

Chemical Maximum (ppm)Median (ppm)FDA ActionLevel (ppm)EPA Region IIIRBC (ppm)
Mercury 0.30 carcass,
0.64 fillet
0.12 carcass,
0.20 fillet
10.41(NC)
4,4-DDD 0.013 carcass,
0.016 fillet
0.008 carcass,
0.0088 fillet
5.00.013 (C)
4,4-DDE 0.110 carcass,
0.092 fillet
0.035 carcass,
0.018 fillet
5.00.0093 (C)
Dieldrin 0.050 carcass,
0.012 fillet
0.015 carcass,
0.0071 fillet
0.30.0002 (C)
Heptachlor
epoxide
0.014 carcass,
0.0052 fillet
0.0045 carcass,
0.0025 fillet
0.30.0007 (C)

1 These levels represent tolerance rather than guidance or action levels.
2 General value for PCBs (i.e., not specific for PCB-1260)
NA = not available
NC = noncancer effects
C = carcinogenic effects


Table 5a. Fish Tissue Data for the Wetlands Area

Chemical Maximum (ppm) FDA Action Level (ppm) EPA Region III RBC (ppm) Adult Non-Cancer Dose (mg/kg/day)1 Child Non-Cancer Dose (mg/kg/day)1 MRL/RfD (noncancer) Cancer Slope Factor Cancer Risk (mg/kg/day)
Pesticides
Dieldrin 0.012 0.3 0.0002 (C) 1.1 x 10-6 7.8 x 10-6 5 x 10-5 16 8 x 10-6
Heptachlor
epoxide
0.0052 0.3 0.0007 (C) 4.8 x 10-7 3.4 x 10-6 5 x 10-4 4.5 9 x 10-7
Mercury 0.64 1.0 0.41 (NC) 5.9 x 10-5 4.2 x 10-4 5 x 10-4 - -
4,4-DDD 0.168 5.0 0.013 (C) 1.6 x 10-5 1.1 x 10-4 5 x 10-4 0.24 2 x 10-6
4,4-DDE 0.57 5.0 0.0093 (C) 5.3 x 10-5 3.7 x 10-4 5 x 10-4 0.34 8 x 10-6

1 Dose = Conc. x IR x FI x EF x ED
                             BW x AT

where
Conc. = Maximum concentration detected (mg/kg)
IR = Ingestion rate = 0.0065 kg/daily intake averaged over a year (EPA 1989)
FI = Fraction ingested (assumed 100%)
EF = Exposure frequency or number of exposure events = 365 days/year
ED = Exposure duration over which exposure occurs = 30 years (adult) and 6 years (child)
BW = Body weight = 70 kg (adult) and 10 kg (child)
AT = Averaging time (the time period over which cumulative exposures are averaged); noncancer =ED x 365 days/year, cancer=70 years x 365 days per year).
C = carcinogenic effects
NC = noncarcinogenic effects

FIGURES

USAF Robins Air Force Base Vicinity Map
Figure 1. USAF Robins Air Force Base Vicinity Map

Environmental Condition of Property Map
Figure 2. Environmental Condition of Property Map

Site LF03 (Landfill No. 3)
Figure 3. Site LF03 (Landfill No. 3)

Site RW15 (Low Level Radioactive Waste Disposal Site
Figure 4. Site RW15 (Low Level Radioactive Waste Disposal Site

Composite Plume Map for Shallow Aquifers
Figure 5. Composite Plume Map for Shallow Aquifers

Northwest Groundwater Plume (Robins AFB)
Figure 6. Northwest Groundwater Plume (Robins AFB)

Terminology Used for Aquifers
Figure 7. Terminology Used for Aquifers

Water Supply Well Locations
Figure 8. Water Supply Well Locations

Duck Lake (Robins AFB)
Figure 9. Duck Lake (Robins AFB)

Site LF04 (Landfill No. 4 NPL Site)
Figure 10. Site LF04 (Landfill No. 4 NPL Site)



Table of Contents

  
 
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