ATSDR - PHA - Naval Air Station Patuxent River, St. Mary's County, Maryland

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PUBLIC HEALTH ASSESSMENT

NAVAL AIR STATION PATUXENT RIVER
ST. MARY'S COUNTY, MARYLAND

APPENDICES

APPENDIX A - ATSDR Public Health Assessment Hazard 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. Indeterminate (potential) 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, has occurred in the past, (or could occur in the future), but the exposure is below, (or expected to be 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 B

List of Installation Restoration Program (IRP) and Underground Storage Tank Program (USTP) Sites at NAS Patuxent River

Site Designation Site Designation

1 Fishing Point Landfill 26 Red Hill Area

2 Disposal Site at Pond 1 27 Construction Debris Disposal Area

3 Disposal Site at Goose Creek 28 Transformer Storage Area

4 Hermanville Disposal Site 29 Carbon Tetrachloride Spill

5 Disposal Site Near Pine Hill Run 30 Paint and Solvent Locker, Bldg. 863

6 Bohneyard 31 Tire Shop, Bldg. 307

7 Fuel Farm 34 Drum Disposal Area

8 Supply Pond 35 Agricultural Area

9 Former Drum Disposal Area 36 Waste Battery Storage, Bldg. 214

10 Ordnance Disposal at Strike 37 Sandblasting Area, Bldg. 214

11 Former Sanitary Landfill 38 Scrap Storage, Bldg. 1811

12 Landfill Behind Rifle Range 39 Waste PCE Storage Area, Bldg. 503

13 Transformer Spill, Bldg. 585 40 Construction Debris Landfill, Strike Area

14 Old Firefighter Burn Area 41 Burn Pad

15 Washrack, Drainage Way, Bldgs. 110, 111 42 Coal Disposal Area, Bldg. 604

16 Drainage Ditch, Bldgs. 305, 306 43 Solid, Liquid Waste Disposal Area

17 Pesticide Shop, Bldg. 841 44 Fill Area

18 Hobby Shop, Bldg. 415 45 Disposal Area

19 Drainage Ditch, Bldgs. 101, 109 46 Liquid Spill/Disposal Area

20 Battery Shop, Bldg. 158 47 Drywell, Bldg. 1354

21 Sludge Drying Beds 48 Water Tower

22 Washrack, Bldgs. 115, 201 49 Water Tower

23
DRMO Salvage Yard 50 Water Tower

24 Dry Well, Bldg. 114 52 Communication Towers

25 Solvent Spill, Bldg. 114 53 Waste 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.

APPENDIX C

Ingestion Rate Calculations for Pond 3:

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

where:

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 heads of households are as follows: Lexington Park census tract, 2.1 years; NAS Patuxent River census tract, 5.0 years; and St. Mary's County, 5.4 years. Using this information as a guide, we selected 7 years as a reasonable exposure duration. Only persons associated with NAS Patuxent River may fish the ponds, and they must obtain permits through the Department of Natural Resources on base. Educational materials are handed out with the permits including size, creel, and consumption limits. A consumption limit of 19 fish meals/year for no more than 7 years and the alternative, a lifetime consumption limit of 133 fish meals, can be easily conveyed to NAS Patuxent River's fishing constituency.

APPENDIX D

IRP SITE SUMMARIES

Site Name: Number
Site Description Waste Disposal History Contaminated Media Status of Remediation ATSDR Evaluation

Site 1: Fishing Point Landfill :
25-acre landfill along river shoreline near bay. Main disposal area for facility from 1960 to 1974, solid and liquid wastes. Groundwater, soils - contaminated with VOCs, pesticides. IAS, CS, and IRI completed; ground- water monitored;
shoreline stabilized;
capping contemplated. Site is posted; capping will prevent exposure and contain possible contamination.

Site 2: Disposal Site at Pond 1:
Wastes disposed of along part of Pond 1 shoreline. Misc. station wastes, construction debris, liquid waste in drums from time of 1942-43 construction of facility. Groundwater, soils - low levels of organics, metals
Fish, sediment - low levels of DDD, DDE, DDT, metals. IRI completed; Site awaits further study or cleanup. Contaminant concentrations are low; there is a consumption limit on fish; no exposures are expected.

Site 3: Disposal Site at Goose Creek:
Landfill (short-term). Main disposal site for facility for 6 months in 1960; IAS revealed nontoxic waste only. None known. Confirmation study not recommended. Site is posted; contam- ination has not been detected, thus no exposures are expected.

Site 4: Hermanville Disposal Site:
8-acre landfill south of Pine Hill Run. Main disposal area for facility from 1943 to 1960; solid and liquid wastes. Groundwater, soils - low levels of organics, metals. IAS, IRI completed; capping, restriction of access contemplated;
RI/FS scheduled. Site is posted; exposures to contaminated soils are not likely.

Site 5: Disposal Area Near Pine Hill Run:
2-acre disposal site west of Pine Hill Run. Data on history lacking; IAS revealed rusting vehicles, vehicle parts, misc. scrap metal. None known. IAS revealed no petroleum products in water or soil; CS not recommended; RI/FS is scheduled. Contamination has not been detected, thus no exposures are expected; site is posted due to physical hazards.

Site 6: Bohneyard:
5-acre disposal area south of Bohne Road. Ash from coal-fired power plant, liquid wastes in drums, scrap metal. Soil - petroleum wastes, metals, PCBs, VOCs. IAS,CS, and EE/CA have been completed; RI/FS is planned. Site is access is restricted; exposure is limited.

Site 7: Fuel Farm and Site 8: Supply Pond are now under the UST Program and have been removed from the IRP List.

Site 9: Former Drum Disposal Area:
5-acre site immediately northwest of Site 6. Scrap metal, drums, asphalt-like substance, Soil - low levels of VOCs and other organics. IAS, partial CS, and SSI completed; RI/FS scheduled. Access is restricted, which prevents injury from physical hazards.

Site 10: Ordnance Disposal at Strike is now under the UST Program and has been removed from the IRP List

Site 11: Former Sanitary Landfill:
6.5 acre landfill near the southern boundary of the installation. Main disposal area for the facility from 1974 to 1980; trash, oil-contaminated soil, and liquid waste. Groundwater, Soils - low levels of VOCs, metals. IAS, CS, and IRI completed; permanent cap installed during IRA; RI/FS is scheduled. The site is fenced and posted; the cap on the site prevents contact with contaminants, so there is no exposure.

Site 12: Landfill Behind Rifle Range:
2-acre landfill south of Fishing Point. Trash and construction debris was disposed of from mid 1950s to 1960 None known. IAS completed; CS deemed unnecessary; RI/FS is scheduled. The site is posted; contamination has not been detected, thus no exposures are expected.

Site 13: Transformer Spill:
Within Bldg. 585 in Carpenter Park. One to five gallons of PCBs leaked from stored transformers. Transformer-fluid spill was contained on concrete floor. Bulk of spilled fluid was cleaned up. Need for further cleanup is to be assessed. Only base personnel have access to the spill area. No exposures are expected.

Site 14: Firefighter Burn Area:
Paved area near Echo South taxiway. Petroleum product burns were conducted for firefighting practice from 1943 to ca. 1955. Burning was done on a concrete pad; no evidence of site staining or stressed vegetation. None deemed necessary. The burned materials left little or no residue. No exposures are expected.

Site 15: Former Wash- rack Drainage Way/ Bldgs. 110 & 111:
Drainage ditch from aircraft washrack to East Patuxent Basin. Rinseate from Turco used for aircraft cleaning from 1943 to 1970 was drained to East Patuxent Basin. Soils in ditch, sediments in Basin may contain petroleum derived contaminants. A storm-water drainage system was installed in 1970, eliminating use of the ditch. An oil/water separator was installed in 1976. A Confirmation Study produced analytical data indicating no health hazard due to soils or sediments.

Site 16: Drainage Ditch South of Buildings 305 & 306:
Ditch extending from washracks to Pond 1. Rinseate from Turco used for aircraft cleaning from 1943 to 1976 was drained to Pond 1. Soils in ditch, sediments in Pond 1 may be contaminated, but to a smaller extent than for Site 15. Based on comparison to Site 15, no further action was deemed necessary. Based on evidence from the Site 15 Confirmation Study, no exposures are expected.

Site 17: Pesticide Shop:
Site at the intersection of Tate and Payne Roads used for pesticide storage and mixing. 300 to 400 gallons of pesticide-formulation rinseate was disposed of per day on this site from 1943 to 1976. Soils are contaminated with significant concentrations of organochlorine, organo-phosphorous and other classes of pesticides. Soil adjacent to the building and in the drainage ditch extending toward Pond 3 was removed and hauled to a RCRA Landfill. The site is fenced and posted to discourage trespass; no exposures are expected.

Site 18: Hobby Shop:
The interior of Bldg. 415, used for a variety of leisure pursuits. This site was used from 1943 to 1971 for hobby projects, some of which required solvents. None known. IAS was conducted and showed no contam- ination. No exposures are expected.

Site 19: Drainage Ditch, Bldgs. 101 & 109:
A washrack ditch between Bldgs. 101 & 109 and Pond 3. An activity similar to that at Site 15 was operated here from 1943-1976; the scale of work was less than for Site 15. None known The Confirmation Study for Site 15 indicated no health hazard, so no CS was required for Site 19. No exposure is expected.

Site 20: Battery Shop:
An area in Bldg. 158 where acid was removed from batteries. From 1960-1975 battery acid was disposed of into a leaching field next to Bldg. 158. Soil was contaminated with ~375 gallons of battery acid, naturally diluted by groundwater. IAS was completed, CS not required. An RI/FS is scheduled. No exposure is expected.

Site 21: Sludge Drying Beds:
Presently vegetated area near Bldg. 600 Sewer sludge was dried here from about 1945 to 1970. Dried sludge was taken to the landfill. None known. IAS was completed, CS not required; drying beds were removed in the 1980s, vegetation has returned. No exposure is expected

Site 22: Washracks and Bowser, Bldg. 115, 201:
Washracks at hangars. Much like Site 19. None known. No CS required. No exposure is expected.

Site 23: DMRO Salvage Yard:
A salvage yard between Bldg. 604 and the West Patuxent Basin. Salvaged materials here from 1961-1971 leaked VOCs, paints, and acids from time to time. Possible groundwater contamination. IAS, CF, IRI completed. An RI/FS is scheduled. The site is paved so that direct contact with any contaminants is not a risk.

Site 24: Dry Well:
Dry well near Bldg. 114 Rinse waters from plating operations were discharged into the dry well from 1943-1970. Groundwater and surface water; rainwater passes from dry well to a stream that empties into the bay. Drywell sampling has shown contamination with metals, etc.; the well and nearby soil have been excavated. Site access will be restricted while contam- ination remains incom- pletely characterized, preventing exposure.

Site 25: Solvent Dispo- sal Area, Bldg. 114:
Open area behind Bldg. 114. Paint wastes and solvents were disposed of here from 1943-1975. None known. A CS revealed no residual contamination of VOCs or TOCs. Contamination has not been detected, thus no exposures are expected.

Site 26: Red Hill Area is now under the UST Program and has been removed from the IRP List.

Site 27: Construction Debris Disposal Area:
Former disposal area. Construction debris and rubble were disposed of during 1942-43. The IAS revealed no sign of debris in the area. No CS needed; An RI/FS is scheduled. Contamination has not been detected, thus no exposures are expected.

Site 28: Transformer Storage Area:
An open area, currently in grass, south of Peary Road. Transformers were stored here from the 1940s to 1973. Soils were contaminated with PCB's. 2300 tons of contaminated soil was excavated and disposed of in a TSCA-compliant landfill. An RI/FS is scheduled. A clean-up level of 10 ppm was achieved in the removal action. This level poses no health hazard.

Site 29: Carbon Tetra- chloride Spill, Bldg. 306:
An open area, now paved, on the eastern side of Bldg. 306. In the late 1940s large amounts of CCl₄ and JP-5 fuel-containing waste oil were disposed of on the ground here. Soils (oil, grease, metals, SVOCs), potentially groundwater, surface water. The site has been paved, providing a barrier to contamination in soil; the groundwater shows little or no contamination. Contamination is low and the pavement prevents contact with the soil underneath. No health risk exists.

Site 30: Paint & Solvent Locker, Bldg. 863:
A drainage ditch discharging into the West Patuxent Basin. A 1970 spill, identity and amount of material unknown, was reported. None known. IAS detected no signs of contamination. Contamination has not been detected, so that no exposure is expected.

Site 31: Tire Shop, Bldg. 307:
A drainage ditch associated with the site discharges into the West Patuxent Basin. From 1943 to 1970 all cleaning compounds (aliphatic napthas, MIBK, xylene, & toluene) were drained into the West Patuxent Basin. None known. The IAS revealed no visible signs of contamination. No CS was done since Site 15 (similar) showed no threat to human health No exposure is expected.

Former Sites 32 and 33 have been removed from the IRP List.

Site 34: Drum Disposal Site:
Sand and gravel borrow pit next to Site 11. Undocumented dumping of drums was reported in the past. Not known 5 monitoring wells have been installed, GW & soil samples were taken for analysis; a magnetic survey was conducted. RI/FS results awaited. This site is fenced, posted, and patrolled; no exposure is likely.

Site 35: Agricultural Area:
Open land near Pine Hill Run. The site may have been used for coal storage. Not known. Limited sampling and analysis indicates high levels of organic carbon, traces of metals. No apparent public health hazard; some additional sampling is planned.

Site 36: Waste Battery Storage Building 214:
Jetty area near Chesapeake Basin. The jetty behind Bldg. 214 was used to hold batteries before final disposal. None known. There are no visual signs of releases. No apparent public health hazard.

Site 37: Sandblasting Area, Bldg. 214:
Near Chesapeake Basin. Storage of a 55-gallon drum of sandblasting waste. None known. There are no visual indications of contamination. No apparent public health hazard.

Site 38: Scrap Storage Building 1811:
Near Chesapeake Basin. Scrap metal, wood and styrofoam was stored behind Bldg. 1811 on a grassy area. None known. The need for any further work will be reviewed. No chemical or physical hazard appears to exist.

Site 39: Waste Perchloroethylene Storage Area, Building 503:
Near the intersection of Cedar Point and Tate Roads. Perchloroethylene (TCE) was used at the dry cleaning facility. None known. Underground storage tanks were removed, no TCE contamination was found. No apparent public health hazard.

Site 40: Construction Debris Landfill:
Near Chesapeake Basin Concrete,asphalt, and lumber were disposed of to stabilize the shoreline. None known. No remediation was considered necessary. No apparent public health hazard.

Site 41: Burn Pad:
Former fire fighting training facility. Fires were set for training porposes from 1952 to 1991. Groundwater - contaminated with petroleum. Free-floating petroleum is pumped continually; further sampling is planned. This area,near a runway, is restricted; no apparent public health hazard exists.

Site 42: Coal Disposal Area Bldg. 604:
Near Site 23. Possible coal storage area for Bldg. 604 boiler. None known. No action was taken; Some further sampling is planned. No exposure is expected.

Site 43: Solid and Probable Liquid Waste Disposal:
Near Site 41. A probable spillway for dredge material from the East Patuxent Basin. None known. No action taken. No exposure is expected.

Site 44: Fill Area:
Located along the Chesapeake Bay, south of Site 3. Possible fill area from 1957 to 1965. None known. No action taken. No exposure is expected.

Site 45: Disposal Area:
Located at the intersection of Taxiways A & B. Possible disposal area from 1952 to 1972. None known. Soil samples analyzed for TCL & TAL. Trenches were dug to check for buried debris. The site is being excavated to build a new Jet Engine Test Cell Facility; no exposure is expected.

Site 46: Liquid Spill/Disposal Area:
Located along Taxiway A, south of Site 6. Possible liquid/solid disposal area from 1957 to 1965. None known. No action taken; further sampling planned. This area along the taxiway is restricted. No exposures are expected.

Site 47: Drywell Bldg. 1354:
Located near Cedar Point Road. Possible disposal of liquid photographic wastes. None known. No action taken; further sampling planned. No exposure is expected.

Sites 48-50: Water Towers:
Located at several points around the base. The soil under the tanks may contain lead-based paint chips. Possible soil contamination with lead paint. No action taken. Exposure risk is low; these structures may be removed from the IRP Site list.

Former Site 51 has been removed from the IRP List.

Site 52: Communication Towers:
Located at various points around the base. The soil under the towers may contain lead-based paint chips. Possible soil contamination with lead paint. No action taken. Exposure risk is low; these structures may be removed from the IRP Site list.

Site 53: Flammable Waste Storage, Bldg. 1811:
Located at the Chesapeake Bay Basin. Waste fuels were reportedly stored in 55 gallon drums on pallets in Bldg. 1811. None known. No action taken; a further review is planned. No exposure is expected.

Table of Contents

Agency for Toxic Substances and Disease Registry, 1825 Century Blvd, Atlanta, GA 30345
Contact CDC: 800-232-4636 / TTY: 888-232-6348

Department of Health and Human Services

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. Indeterminate (potential) 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, has occurred in the past, (or could occur in the future), but the exposure is below, (or expected to be 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 B
List of Installation Restoration Program (IRP) and Underground Storage Tank Program (USTP) Sites at NAS Patuxent River
Site	Designation	Site	Designation
1	Fishing Point Landfill	26	Red Hill Area
2	Disposal Site at Pond 1	27	Construction Debris Disposal Area
3	Disposal Site at Goose Creek	28	Transformer Storage Area
4	Hermanville Disposal Site	29	Carbon Tetrachloride Spill
5	Disposal Site Near Pine Hill Run	30	Paint and Solvent Locker, Bldg. 863
6	Bohneyard	31	Tire Shop, Bldg. 307
7	Fuel Farm	34	Drum Disposal Area
8	Supply Pond	35	Agricultural Area
9	Former Drum Disposal Area	36	Waste Battery Storage, Bldg. 214
10	Ordnance Disposal at Strike	37	Sandblasting Area, Bldg. 214
11	Former Sanitary Landfill	38	Scrap Storage, Bldg. 1811
12	Landfill Behind Rifle Range	39	Waste PCE Storage Area, Bldg. 503
13	Transformer Spill, Bldg. 585	40	Construction Debris Landfill, Strike Area
14	Old Firefighter Burn Area	41	Burn Pad
15	Washrack, Drainage Way, Bldgs. 110, 111	42	Coal Disposal Area, Bldg. 604
16	Drainage Ditch, Bldgs. 305, 306	43	Solid, Liquid Waste Disposal Area
17	Pesticide Shop, Bldg. 841	44	Fill Area
18	Hobby Shop, Bldg. 415	45	Disposal Area
19	Drainage Ditch, Bldgs. 101, 109	46	Liquid Spill/Disposal Area
20	Battery Shop, Bldg. 158	47	Drywell, Bldg. 1354
21	Sludge Drying Beds	48	Water Tower
22	Washrack, Bldgs. 115, 201	49	Water Tower
23	DRMO Salvage Yard	50	Water Tower
24	Dry Well, Bldg. 114	52	Communication Towers
25	Solvent Spill, Bldg. 114	53	Waste 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.

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

Site Name: Number Site Description	Waste Disposal History	Contaminated Media	Status of Remediation	ATSDR Evaluation
Site 1: Fishing Point Landfill : 25-acre landfill along river shoreline near bay.	Main disposal area for facility from 1960 to 1974, solid and liquid wastes.	Groundwater, soils - contaminated with VOCs, pesticides.	IAS, CS, and IRI completed; ground- water monitored; shoreline stabilized; capping contemplated.	Site is posted; capping will prevent exposure and contain possible contamination.
Site 2: Disposal Site at Pond 1: Wastes disposed of along part of Pond 1 shoreline.	Misc. station wastes, construction debris, liquid waste in drums from time of 1942-43 construction of facility.	Groundwater, soils - low levels of organics, metals Fish, sediment - low levels of DDD, DDE, DDT, metals.	IRI completed; Site awaits further study or cleanup.	Contaminant concentrations are low; there is a consumption limit on fish; no exposures are expected.
Site 3: Disposal Site at Goose Creek: Landfill (short-term).	Main disposal site for facility for 6 months in 1960; IAS revealed nontoxic waste only.	None known.	Confirmation study not recommended.	Site is posted; contam- ination has not been detected, thus no exposures are expected.
Site 4: Hermanville Disposal Site: 8-acre landfill south of Pine Hill Run.	Main disposal area for facility from 1943 to 1960; solid and liquid wastes.	Groundwater, soils - low levels of organics, metals.	IAS, IRI completed; capping, restriction of access contemplated; RI/FS scheduled.	Site is posted; exposures to contaminated soils are not likely.
Site 5: Disposal Area Near Pine Hill Run: 2-acre disposal site west of Pine Hill Run.	Data on history lacking; IAS revealed rusting vehicles, vehicle parts, misc. scrap metal.	None known.	IAS revealed no petroleum products in water or soil; CS not recommended; RI/FS is scheduled.	Contamination has not been detected, thus no exposures are expected; site is posted due to physical hazards.
Site 6: Bohneyard: 5-acre disposal area south of Bohne Road.	Ash from coal-fired power plant, liquid wastes in drums, scrap metal.	Soil - petroleum wastes, metals, PCBs, VOCs.	IAS,CS, and EE/CA have been completed; RI/FS is planned.	Site is access is restricted; exposure is limited.
Site 7: Fuel Farm and Site 8: Supply Pond are now under the UST Program and have been removed from the IRP List.
Site 9: Former Drum Disposal Area: 5-acre site immediately northwest of Site 6.	Scrap metal, drums, asphalt-like substance,	Soil - low levels of VOCs and other organics.	IAS, partial CS, and SSI completed; RI/FS scheduled.	Access is restricted, which prevents injury from physical hazards.
Site 10: Ordnance Disposal at Strike is now under the UST Program and has been removed from the IRP List
Site 11: Former Sanitary Landfill: 6.5 acre landfill near the southern boundary of the installation.	Main disposal area for the facility from 1974 to 1980; trash, oil-contaminated soil, and liquid waste.	Groundwater, Soils - low levels of VOCs, metals.	IAS, CS, and IRI completed; permanent cap installed during IRA; RI/FS is scheduled.	The site is fenced and posted; the cap on the site prevents contact with contaminants, so there is no exposure.
Site 12: Landfill Behind Rifle Range: 2-acre landfill south of Fishing Point.	Trash and construction debris was disposed of from mid 1950s to 1960	None known.	IAS completed; CS deemed unnecessary; RI/FS is scheduled.	The site is posted; contamination has not been detected, thus no exposures are expected.
Site 13: Transformer Spill: Within Bldg. 585 in Carpenter Park.	One to five gallons of PCBs leaked from stored transformers.	Transformer-fluid spill was contained on concrete floor.	Bulk of spilled fluid was cleaned up. Need for further cleanup is to be assessed.	Only base personnel have access to the spill area. No exposures are expected.
Site 14: Firefighter Burn Area: Paved area near Echo South taxiway.	Petroleum product burns were conducted for firefighting practice from 1943 to ca. 1955.	Burning was done on a concrete pad; no evidence of site staining or stressed vegetation.	None deemed necessary.	The burned materials left little or no residue. No exposures are expected.
Site 15: Former Wash- rack Drainage Way/ Bldgs. 110 & 111: Drainage ditch from aircraft washrack to East Patuxent Basin.	Rinseate from Turco used for aircraft cleaning from 1943 to 1970 was drained to East Patuxent Basin.	Soils in ditch, sediments in Basin may contain petroleum derived contaminants.	A storm-water drainage system was installed in 1970, eliminating use of the ditch. An oil/water separator was installed in 1976.	A Confirmation Study produced analytical data indicating no health hazard due to soils or sediments.
Site 16: Drainage Ditch South of Buildings 305 & 306: Ditch extending from washracks to Pond 1.	Rinseate from Turco used for aircraft cleaning from 1943 to 1976 was drained to Pond 1.	Soils in ditch, sediments in Pond 1 may be contaminated, but to a smaller extent than for Site 15.	Based on comparison to Site 15, no further action was deemed necessary.	Based on evidence from the Site 15 Confirmation Study, no exposures are expected.
Site 17: Pesticide Shop: Site at the intersection of Tate and Payne Roads used for pesticide storage and mixing.	300 to 400 gallons of pesticide-formulation rinseate was disposed of per day on this site from 1943 to 1976.	Soils are contaminated with significant concentrations of organochlorine, organo-phosphorous and other classes of pesticides.	Soil adjacent to the building and in the drainage ditch extending toward Pond 3 was removed and hauled to a RCRA Landfill.	The site is fenced and posted to discourage trespass; no exposures are expected.
Site 18: Hobby Shop: The interior of Bldg. 415, used for a variety of leisure pursuits.	This site was used from 1943 to 1971 for hobby projects, some of which required solvents.	None known.	IAS was conducted and showed no contam- ination.	No exposures are expected.
Site 19: Drainage Ditch, Bldgs. 101 & 109: A washrack ditch between Bldgs. 101 & 109 and Pond 3.	An activity similar to that at Site 15 was operated here from 1943-1976; the scale of work was less than for Site 15.	None known	The Confirmation Study for Site 15 indicated no health hazard, so no CS was required for Site 19.	No exposure is expected.
Site 20: Battery Shop: An area in Bldg. 158 where acid was removed from batteries.	From 1960-1975 battery acid was disposed of into a leaching field next to Bldg. 158.	Soil was contaminated with ~375 gallons of battery acid, naturally diluted by groundwater.	IAS was completed, CS not required. An RI/FS is scheduled.	No exposure is expected.
Site 21: Sludge Drying Beds: Presently vegetated area near Bldg. 600	Sewer sludge was dried here from about 1945 to 1970. Dried sludge was taken to the landfill.	None known.	IAS was completed, CS not required; drying beds were removed in the 1980s, vegetation has returned.	No exposure is expected
Site 22: Washracks and Bowser, Bldg. 115, 201: Washracks at hangars.	Much like Site 19.	None known.	No CS required.	No exposure is expected.
Site 23: DMRO Salvage Yard: A salvage yard between Bldg. 604 and the West Patuxent Basin.	Salvaged materials here from 1961-1971 leaked VOCs, paints, and acids from time to time.	Possible groundwater contamination.	IAS, CF, IRI completed. An RI/FS is scheduled.	The site is paved so that direct contact with any contaminants is not a risk.
Site 24: Dry Well: Dry well near Bldg. 114	Rinse waters from plating operations were discharged into the dry well from 1943-1970.	Groundwater and surface water; rainwater passes from dry well to a stream that empties into the bay.	Drywell sampling has shown contamination with metals, etc.; the well and nearby soil have been excavated.	Site access will be restricted while contam- ination remains incom- pletely characterized, preventing exposure.
Site 25: Solvent Dispo- sal Area, Bldg. 114: Open area behind Bldg. 114.	Paint wastes and solvents were disposed of here from 1943-1975.	None known.	A CS revealed no residual contamination of VOCs or TOCs.	Contamination has not been detected, thus no exposures are expected.
Site 26: Red Hill Area is now under the UST Program and has been removed from the IRP List.
Site 27: Construction Debris Disposal Area: Former disposal area.	Construction debris and rubble were disposed of during 1942-43.	The IAS revealed no sign of debris in the area.	No CS needed; An RI/FS is scheduled.	Contamination has not been detected, thus no exposures are expected.
Site 28: Transformer Storage Area: An open area, currently in grass, south of Peary Road.	Transformers were stored here from the 1940s to 1973.	Soils were contaminated with PCB's.	2300 tons of contaminated soil was excavated and disposed of in a TSCA-compliant landfill. An RI/FS is scheduled.	A clean-up level of 10 ppm was achieved in the removal action. This level poses no health hazard.
Site 29: Carbon Tetra- chloride Spill, Bldg. 306: An open area, now paved, on the eastern side of Bldg. 306.	In the late 1940s large amounts of CCl₄ and JP-5 fuel-containing waste oil were disposed of on the ground here.	Soils (oil, grease, metals, SVOCs), potentially groundwater, surface water.	The site has been paved, providing a barrier to contamination in soil; the groundwater shows little or no contamination.	Contamination is low and the pavement prevents contact with the soil underneath. No health risk exists.
Site 30: Paint & Solvent Locker, Bldg. 863: A drainage ditch discharging into the West Patuxent Basin.	A 1970 spill, identity and amount of material unknown, was reported.	None known.	IAS detected no signs of contamination.	Contamination has not been detected, so that no exposure is expected.
Site 31: Tire Shop, Bldg. 307: A drainage ditch associated with the site discharges into the West Patuxent Basin.	From 1943 to 1970 all cleaning compounds (aliphatic napthas, MIBK, xylene, & toluene) were drained into the West Patuxent Basin.	None known.	The IAS revealed no visible signs of contamination. No CS was done since Site 15 (similar) showed no threat to human health	No exposure is expected.
Former Sites 32 and 33 have been removed from the IRP List.
Site 34: Drum Disposal Site: Sand and gravel borrow pit next to Site 11.	Undocumented dumping of drums was reported in the past.	Not known	5 monitoring wells have been installed, GW & soil samples were taken for analysis; a magnetic survey was conducted.	RI/FS results awaited. This site is fenced, posted, and patrolled; no exposure is likely.
Site 35: Agricultural Area: Open land near Pine Hill Run.	The site may have been used for coal storage.	Not known.	Limited sampling and analysis indicates high levels of organic carbon, traces of metals.	No apparent public health hazard; some additional sampling is planned.
Site 36: Waste Battery Storage Building 214: Jetty area near Chesapeake Basin.	The jetty behind Bldg. 214 was used to hold batteries before final disposal.	None known.	There are no visual signs of releases.	No apparent public health hazard.
Site 37: Sandblasting Area, Bldg. 214: Near Chesapeake Basin.	Storage of a 55-gallon drum of sandblasting waste.	None known.	There are no visual indications of contamination.	No apparent public health hazard.
Site 38: Scrap Storage Building 1811: Near Chesapeake Basin.	Scrap metal, wood and styrofoam was stored behind Bldg. 1811 on a grassy area.	None known.	The need for any further work will be reviewed.	No chemical or physical hazard appears to exist.
Site 39: Waste Perchloroethylene Storage Area, Building 503: Near the intersection of Cedar Point and Tate Roads.	Perchloroethylene (TCE) was used at the dry cleaning facility.	None known.	Underground storage tanks were removed, no TCE contamination was found.	No apparent public health hazard.
Site 40: Construction Debris Landfill: Near Chesapeake Basin	Concrete,asphalt, and lumber were disposed of to stabilize the shoreline.	None known.	No remediation was considered necessary.	No apparent public health hazard.
Site 41: Burn Pad: Former fire fighting training facility.	Fires were set for training porposes from 1952 to 1991.	Groundwater - contaminated with petroleum.	Free-floating petroleum is pumped continually; further sampling is planned.	This area,near a runway, is restricted; no apparent public health hazard exists.
Site 42: Coal Disposal Area Bldg. 604: Near Site 23.	Possible coal storage area for Bldg. 604 boiler.	None known.	No action was taken; Some further sampling is planned.	No exposure is expected.
Site 43: Solid and Probable Liquid Waste Disposal: Near Site 41.	A probable spillway for dredge material from the East Patuxent Basin.	None known.	No action taken.	No exposure is expected.
Site 44: Fill Area: Located along the Chesapeake Bay, south of Site 3.	Possible fill area from 1957 to 1965.	None known.	No action taken.	No exposure is expected.
Site 45: Disposal Area: Located at the intersection of Taxiways A & B.	Possible disposal area from 1952 to 1972.	None known.	Soil samples analyzed for TCL & TAL. Trenches were dug to check for buried debris.	The site is being excavated to build a new Jet Engine Test Cell Facility; no exposure is expected.
Site 46: Liquid Spill/Disposal Area: Located along Taxiway A, south of Site 6.	Possible liquid/solid disposal area from 1957 to 1965.	None known.	No action taken; further sampling planned.	This area along the taxiway is restricted. No exposures are expected.
Site 47: Drywell Bldg. 1354: Located near Cedar Point Road.	Possible disposal of liquid photographic wastes.	None known.	No action taken; further sampling planned.	No exposure is expected.
Sites 48-50: Water Towers: Located at several points around the base.	The soil under the tanks may contain lead-based paint chips.	Possible soil contamination with lead paint.	No action taken.	Exposure risk is low; these structures may be removed from the IRP Site list.
Former Site 51 has been removed from the IRP List.
Site 52: Communication Towers: Located at various points around the base.	The soil under the towers may contain lead-based paint chips.	Possible soil contamination with lead paint.	No action taken.	Exposure risk is low; these structures may be removed from the IRP Site list.
Site 53: Flammable Waste Storage, Bldg. 1811: Located at the Chesapeake Bay Basin.	Waste fuels were reportedly stored in 55 gallon drums on pallets in Bldg. 1811.	None known.	No action taken; a further review is planned.	No exposure is expected.