Alameda Point Naval Air Station
Environmental Baseline Survey

Parcels P41-P60


Parcel P41 | Parcel P42 | Parcel P43 | Parcel P44 | Parcel P45 | Parcel P46 | Parcel P47
Parcel P48 | Parcel P49 | Parcel P50 | Parcel P51 | Parcel P52 | Parcel P53 | Parcel P54
Parcel P55 | Parcel P56 | Parcel P57 | Parcel P58 | Parcel P59 | Parcel P60 | Zone Index

Parcel P41

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 1.0 x 10-6. Primary soil contaminants are benzo(a)pyrene (0.054 mg/kg max.) and other polynuclear aromatic hydrocarbons.

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 42

BRAC1 No Evidence of Spill
No soil or groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 43

BRAC1 No Evidence of Spill
No soil or groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 44

BRAC3 No Cleanup Proposed
No soil or groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 45

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 1.4 x 10-6. Primary soil contaminant is benzo(a)pyrene (0.059 mg/kg max.). The Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=0.151. for soil exposure. The principle compound responsible for the non-cancer risk is anthracene (0.066 mg/kg max.). A subsequent Tier 2 Risk Screen indicated the following:

Groundwater Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 3.0 x 10-4. Primary groundwater contaminant is vinyl chloride (6.0 µg/L max.). The Tier 1 Risk Screen reported an unacceptable non-cancer risk, Hazard Index=4.93. for groundwater exposure. The principle compound responsible for the non-cancer risk is 1,2-dichloroethylene (270 µg/L max.). A subsequent Tier 2 Risk Screen indicated the following:


Parcel 46

BRAC1 No Evidence of Spill
Soil Exposure: One sample was collected from this parcel and screened for XRF Metals, diesel fuel, gasoline, and volatile organics. Only nickel (29 mg/kg max.) and zinc (27 mg/kg max.) were detected.

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 47

BRAC3 No Cleanup Proposed
No soil or groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 48

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates acceptable cancer risk, 2.5 x 10-8. Primary soil contaminant is bis(2-ethylhexyl)phthalate (0.78 mg/kg).

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 49

BRAC3 No Cleanup Proposed
Soil Exposure: Diesel Fuel (6.0 mg/kg max.) is found in samples from this parcel. Petroleum products were not included in the Risk Screen.

Residential Tier 1 Risk Screen indicates acceptable cancer risk, 6.1 x 10-7. Primary soil contaminants are chromium (53.1 mg/kg) and n-nitroso di-n-propylamine (0.023 mg/kg). The Tier 1 Risk Screen reported an unacceptable non-cancer risk, Hazard Index=1.02, for soil exposure. The principle compounds responsible for the non-cancer risk included: nickel (61.4 mg/kg max.), and thallium (3.6 mg/kg max).

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel P50

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates acceptable cancer risk, 7.3 x 10-10. Primary soil contaminant is bis(2-ethylhexyl)phthalate (0.023 mg/kg max.). Residential Tier 1 Risk Screen indicates acceptable non-cancer risk, Hazard Index=0.000. Primary soil contaminant is dibutylphthalate. (0.066 mg/kg max.)

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 51

BRAC3 No Cleanup Proposed
  • Zone Z11
  • Building B11, B197, B311, B312
Soil Exposure: Residential Tier 1 Risk Screen indicates acceptable cancer risk, 6.4 x 10-8. Primary soil contaminant is benzo(b)fluoranthene (0.036 mg/kg max.). Residential Tier 1 Risk Screen indicates acceptable non-cancer risk, Hazard Index=0.463. Primary soil contaminant is thallium(2.7 mg/kg max.).

Groundwater Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 2.6 x 10-5 from groundwater exposure. Primary groundwater contaminants are the chlorinated solvents chloroform (12 µg/L max.) and trichloroethylene (6 µg/L max.). Tier 1 Risk Screen indicates acceptable non-cancer risk, Hazard Index=0.128. Primary groundwater contaminants are chloroform and trichloroethylene.


Parcel P52

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates acceptable cancer risk, 4.8 x 10-9. Primary soil contaminants are benzo(a)pyrene (0.002 mg/kg max.) and methylene chloride (0.043 mg/kg max.). The Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=0.000. The principle compound responsible for the non-cancer risk is benzo(a)pyrene. A subsequent Tier 2 Risk Screen indicated the following:

Groundwater Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 1.6 x 10-4. Primary groundwater contaminants are chloroform (55 µg/L max.) and trichloroethylene (9 µg/L max.). The Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=0.520. The principle compound responsible for the non-cancer risk are chloroform and trichloroethylene.


Parcel 53

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk 1.6 x 10-6. Primary soil contaminants are PCBs (0.1 mg/kg max.).

Groundwater Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk 6.9 x 10-5. Primary groundwater contaminants are the chlorinated solvents chloroform (11 µg/L max.) and trichloroethylene (3 µg/L max.).


Parcel P54

BRAC6 Cleanup Required
Soil Exposure: Gasoline (210 mg/kg max.) and Diesel Fuel (730 mg/kg max.) are found in samples from this parcel. Petroleum products were not included in the Risk Screen.

Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 6.6 x 10-5. Primary soil contaminant is arsenic (329 mg/kg max.). The Tier 1 Risk Screen reported an unacceptable non-cancer risk, Hazard Index=7.95. The principle compounds responsible for the non-cancer risk included: aluminum (29,000 mg/kg max.), antimony (20.7 mg/kg max.), arsenic, lead (1,770 mg/kg max.), manganese (942 mg/kg max.), mercury (18.9 mg/kg max.), nickel (79 mg/kg max.), and thallium (335 mg/kg max). A subsequent Tier 2 Risk Screen indicated the following:

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel P55

BRAC3 No Cleanup Proposed
  • Zone Z10
  • Building B261
  • Parcel has 29 RCRA Sites.
Soil Exposure: Residential Tier 1 Risk Screen indicates acceptable cancer risk, 3.7 x 10-10. Only chemical of concern was tetrachlorethylene (0.002 mg/kg max.)

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 56

BRAC1 No Evidence of Spill
Soil Exposure: Oil and grease (252 mg/kg max in soil) were the only compounds detected in the one soil sample collected from this parcel. This sample was also screened for XRF Metals, gasoline and diesel fuel, and was analyzed for volatile organics, semi-volatile organics, chlorinated pesticides, PCBs, butyl tin, and reactivity.

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel P57

BRAC6 Cleanup Required
Soil Exposure: Gasoline (1,500 mg/kg max) and Diesel Fuel (1,800 mg/kg max) are found in samples from this parcel. Petroleum products were not included in the Risk Screen.

Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 4.3 x 10-5. Primary soil contaminants are arsenic (12.6 mg/kg) and 1,1-dichloroethylene (0.26 mg/kg). The Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=2.07, for soil exposure. The principle compounds responsible for the non-cancer risk included: arsenic, cadmium (11.1 mg/kg max.), nickel (49.2 mg/kg max.), thallium (5.1 mg/kg max) and xylenes (240 mg/kg max). A Tier 2 Risk Screen indicated the following:

Groundwater Exposure: Residential Tier 1 Risk Screen indicates unacceptable cancer risk, 3.9 x 10-2 from groundwater exposure. Primary groundwater contaminant is vinyl chloride (580 µg/L max.), tetrachloroethylene (2.0 µg/L max.), and trichloroethylene (10 µg/L max.). The Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=140, for groundwater exposure. The compounds responsible for non-cancer risk include: 1,1,1-trichloroethane (4,700 µg/L max.), 1,1-dichloroethane (1,300 µg/L max.), 1,1-dichloroethylene (290 µg/L max.), 1,2-dichloroethylene (780 µg/L max.), aluminum (213,000 µg/L max.), arsenic (85.8 µg/L max.), barium (3,770 µg/L max.), carbon tetrachloride (130 µg/L max.), lead (184 µg/L max.), manganese (5,610 µg/L max.), nickel (1,170 µg/L max.), and vanadium (1,330 µg/L max.). A Tier 2 Risk Screen indicated the following:


Parcel P58

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen indicates acceptable cancer risk, 1.1 x 10-9. Primary soil contaminant is bis(2-ethylhexyl)phthalate (0.034 mg/kg max.) Residential Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=0.000. The prinicple chemicals of concern are di(n)butyl phthalate (0.076 mg/kg max.), and bis(2-ethylhexyl)phthalate.

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel P59

BRAC3 No Cleanup Proposed
Soil Exposure: Residential Tier 1 Risk Screen reported an acceptable non-cancer risk, Hazard Index=0.000. The only chemical of concern was di(n)butyl phthalate.

No groundwater samples were collected from this parcel during the EBS sampling program.


Parcel 60

CERFA No Evidence of Hazmat Activity
No soil or groundwater samples were collected from this parcel during the EBS sampling program.


Parcel P1-20 | Parcel P21-40 | Parcel P41-60 | Parcel P61-80 | Parcel P81-90 | Parcel P101-20
Parcel P121-40 | Parcel P141-60 | Parcel P161-80 | Parcel P181-200 | Parcel P201-14 | Zone Index

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February 1, 1998
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