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NAVY INSTALLATION ID: CA917002477500

Mare Island Naval Shipyard

vallejo, California

Cost So Far

$290M

Money already spent on the evaluation and cleanup of hazardous sites.

Expected Additional Cost

$63.7M

The estimated amount of money needed for evaluation and cleanup of hazardous sites at this installation.

Expected Completion Date

2024

The date by which the DOD estimates cleanup of all sites will be complete. Long term monitoring may continue after this date.

52 Hazardous Sites

Below are the locations of hazardous sites associated with this military installation, according to the DOD. A site’s contamination may affect a much larger area, including public and private lands and the water supplies beneath them.

High Risk

Medium Risk

Low Risk

Risk Not Evaluated or Not Required

Response Complete

We haven't independently confirmed the location of every site. If you notice a site placed at the incorrect location, please contact us.

Not all sites in the DOD data include location information, so there may be sites listed below that are missing from the map. The risk level of a site refers to a relative risk assessment made by the DOD to prioritize the cleanup of sites.

Land Controls & Restrictions

Many sites have been declared “clean” by the DOD but are still not safe for people. This military installation is safe only with the following conditions in place: deed restrictions, fences, warning signs. see more » annual written certification of compliance with lucs a deed restriction is documented in the parcel deed. notice to federal or state regulators, property owners, etc. before changes in land use or ownership. a barrier, including but not limited to a paved surface or landfill cap, must be maintained in order to prevent exposure to contaminants, including vapor intrusion into an enclosed structure. gate(s) and/or door(s) must be locked to prevent access and exposure to contaminants. notices other than in deed, e.g., newspaper advertisements. a warning sign is in place surrounding the area a fence around controlled area, with or without gate. incorporation of lucs into a base master plan prohibit residential use in certain areas, unless prior written approval of the navy and lead regulatory agency is obtained. prohibits disturbance of surface or subsurface soil due to invasive activities such as construction, unless prior written approval of the navy and lead regulatory agency is obtained. prohibit construction and/or operation of businesses, structures or other areas frequented by sensitive populations, such as children and the elderly, unless prior written approval of the navy and lead regulatory agency is obtained. prohibits the disturbance or use of existing groundwater wells, unless prior written approval of the navy and lead regulatory agency is obtained. a landfill cover at the site prevents exposure to contaminated soil and reduces infiltration of groundwater. this cover will be inspected and maintained. « see less

15 Active Sites

Sites where military cleanup actions are still ongoing. The risk level of a site refers to a relative risk assessment made by the DOD, which prioritizes the cleanup of sites that pose greatest threat to safety, human health, and the environment.

Site ID: SITE 00016

MARE ISLAND NSY

Spill Site Area

Cost

$70K

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jan 2016

This site is under ongoing monitoring until Feb 2024

Contaminated Areas

Soil: High Risk

Contaminants: Selenium 0.58 ppb Beryllium and compounds 1.4 ppb Molybdenum 19.6 ppb Cadmium and compounds 23.56 ppb Silver and compounds 64.96 ppb Arsenic (noncancer) 334.0 ppb Mercury and compounds (inorganic) 384.27 ppb Vanadium 388.76 ppb Barium and compounds 487.0 ppb Tin and compounds 570.61 ppb Nickel and compounds 1240.0 ppb Antimony and compounds 2400.0 ppb Manganese and compounds 3360.0 ppb Copper and compounds 5200.21 ppb Zinc 9838.64 ppb Aluminum 36900.0 ppb Iron 107950.0 ppb Lead 443000.0 ppb

Groundwater: Medium Risk

Contaminants: Heptachlor epoxide 30.0 ppb Chlordane, gamma- 40.0 ppb DDT 50.0 ppb Ethyl chloride 800.0 ppb Chlorobenzene 900.0 ppb Carbon disulfide 900.0 ppb 1,1-Dichloroethylene 1000.0 ppb Ethylbenzene 2000.0 ppb Dichloroethane, 1,1- 2000.0 ppb Fluorene 2000.0 ppb 1,2-Dichlorobenzene 2000.0 ppb Dieldrin 2800.0 ppb Naphthalene 3000.0 ppb Methyl isobutyl ketone 5000.0 ppb Anthracene 6000.0 ppb Tetrachloroethylene (PCE) 6000.0 ppb Chloromethane 6000.0 ppb Hexachlorocyclopentadiene 6000.0 ppb Styrene 7000.0 ppb Beryllium and compounds 7900.0 ppb Toluene 9000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 11000.0 ppb Benzene 11000.0 ppb 4-Methylphenol 12000.0 ppb Methylnaphthalene,2 15000.0 ppb Xylene (mixed) 18000.0 ppb Methyl ethyl ketone 18000.0 ppb Selenium 18700.0 ppb Trichloroethylene (TCE) 20000.0 ppb Bis(2-chloroethyl)ether 26000.0 ppb 2-Methylphenol 30000.0 ppb Cadmium and compounds 40900.0 ppb Polychlorinated biphenyls (PCBs) 41800.0 ppb Mercury and compounds (inorganic) 50700.0 ppb Acetone 65000.0 ppb Phenol 70000.0 ppb Vanadium 136000.0 ppb Nickel and compounds 160000.0 ppb Molybdenum 166000.0 ppb Antimony and compounds 207000.0 ppb 2,4-Dimethylphenol 320000.0 ppb Barium and compounds 658000.0 ppb Copper and compounds 714000.0 ppb Zinc 1130000.0 ppb 1,2-Dichloroethylene (mixture) 1300000.0 ppb Vinyl chloride 1300000.0 ppb Arsenic (cancer) 1490000.0 ppb Nitrite 2270000.0 ppb Nitrate 3700000.0 ppb Manganese and compounds 5060000.0 ppb Aluminum 8000000.0 ppb Lead 13100000.0 ppb Iron 32700000.0 ppb

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Site ID: SITE 00029

MARE ISLAND NSY

Contaminated Fill

Cost

$6M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Feb 2021

This site is under ongoing monitoring until Apr 2050

Contaminated Areas

Soil: High Risk

Contaminants: Aroclor 1.0 ppb Cadmium and compounds 6.0 ppb Nickel (Soluble Salts) 210.0 ppb Zinc 485.0 ppb Lead 561.0 ppb Chromium 1050.0 ppb Copper and compounds 1430.0 ppb

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Site ID: SITE 00030

MARE ISLAND NSY

Surface Disposal Area

Cost

$4.31M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jun 2020

This site is under ongoing monitoring until Jul 2050

Contaminated Areas

Soil: High Risk

Contaminants: Aroclor 2.0 ppb Cadmium and compounds 138.0 ppb Copper and compounds 163.0 ppb Chromium 4040.0 ppb Lead 20600.0 ppb Zinc 33000.0 ppb

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Site ID: SITE 00017

MARE ISLAND NSY

Storage Area

Cost

$3.42M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jul 2018

This site is under ongoing monitoring until Sep 2046

Contaminated Areas

Soil: High Risk

Contaminants: Methylene chloride 0.01 ppb Endosulfan 0.02 ppb Chlordane 0.02 ppb Methyl ethyl ketone 0.02 ppb Endrin 0.04 ppb Dieldrin 0.05 ppb Methoxychlor 0.05 ppb Acenaphthene 0.05 ppb DDD,4,4- 0.06 ppb DDE,4,4- 0.07 ppb Dibutyl phthalate 0.09 ppb DDT 0.14 ppb Carbazole 0.17 ppb 4-Methylphenol 0.22 ppb Dimethyl phthalate 0.69 ppb Selenium 0.71 ppb Acetone 0.81 ppb Benzoic acid 1.2 ppb Cyanide (free) 2.0 ppb Toluene 2.1 ppb Anthracene 2.5 ppb Fluoride 2.6 ppb Beryllium and compounds 2.8 ppb Phenol 3.2 ppb Methylnaphthalene,2 5.7 ppb Indeno[1,2,3-cd]pyrene 5.8 ppb Silver and compounds 5.82 ppb Ethylbenzene 6.0 ppb Benzo[a]pyrene 9.7 ppb Bis(2-ethylhexyl)phthalate (DEHP) 14.0 ppb Benzo[b]fluoranthene 14.0 ppb Benzo[k]fluoranthene 14.0 ppb Nitrate 15.5 ppb Arsenic (noncancer) 21.9 ppb Benz(a)anthracene 25.0 ppb Polychlorinated biphenyls (PCBs) 29.54 ppb Chrysene 30.0 ppb Fluoranthene 31.0 ppb Pyrene 35.0 ppb Cadmium and compounds 59.3 ppb Tin and compounds 77.57 ppb Xylene (mixed) 96.0 ppb Molybdenum 98.2 ppb Nickel and compounds 155.42 ppb Vanadium 244.32 ppb Mercury and compounds (inorganic) 386.0 ppb Barium and compounds 2380.0 ppb Antimony and compounds 3140.0 ppb Manganese and compounds 3983.59 ppb Aluminum 20000.0 ppb Copper and compounds 54985.78 ppb Iron 60040.0 ppb Lead 64700.0 ppb Zinc 127000.0 ppb

Groundwater: Medium Risk

Contaminants: HCH (beta) 60.0 ppb Bromodichloromethane 700.0 ppb Trichloroethylene (TCE) 700.0 ppb Polychlorinated biphenyls (PCBs) 1500.0 ppb Beryllium and compounds 1500.0 ppb Chlorobenzene 3000.0 ppb 1,2-Dichloroethylene (mixture) 3000.0 ppb Mercury and compounds (inorganic) 3400.0 ppb 1,4-Dichlorobenzene 4000.0 ppb 1,3-Dichlorobenzene 4000.0 ppb Molybdenum 7400.0 ppb Carbon disulfide 9000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 12000.0 ppb Selenium 12400.0 ppb Antimony and compounds 14000.0 ppb Methyl isobutyl ketone 18000.0 ppb Methylnaphthalene,2 18000.0 ppb Lead 20700.0 ppb Cadmium and compounds 27000.0 ppb Chloroform 34000.0 ppb Silver and compounds 34600.0 ppb Nickel and compounds 34900.0 ppb Methylene chloride 41000.0 ppb Methyl ethyl ketone 46000.0 ppb Copper and compounds 56900.0 ppb Arsenic (cancer) 70900.0 ppb Naphthalene 94000.0 ppb Benzene 150000.0 ppb Vanadium 161000.0 ppb Acetone 210000.0 ppb Zinc 212000.0 ppb 2,4-Dimethylphenol 420000.0 ppb Nitrate 941000.0 ppb Ethylbenzene 1200000.0 ppb Barium and compounds 1400000.0 ppb Toluene 2800000.0 ppb Fluoride 4000000.0 ppb Nitrite 6600000.0 ppb Aluminum 6910000.0 ppb Manganese and compounds 7660000.0 ppb Xylene (mixed) 14000000.0 ppb Iron 33700000.0 ppb 2-Methylphenol 74000000.0 ppb 4-Methylphenol 93000000.0 ppb Phenol 670000000.0 ppb

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Site ID: SITE 00004

MARE ISLAND NSY

Spill Site Area

Cost

$5.73M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

May 2018

This site is under ongoing monitoring until May 2048

Contaminated Areas

Sediment (Human): High Risk

Contaminants: Antimony and compounds 3.7 ppb Lead 171.0 ppb Nickel and compounds 1780.0 ppb Manganese 1960.0 ppb

Soil: High Risk

Contaminants: Vanadium 724.0 ppb Nickel and compounds 3180.0 ppb Chromium VI and compounds 5340.0 ppb Lead 5470.0 ppb

Sediment (Marine): High Risk

Contaminants: Antimony and compounds 3.7 ppb Lead 171.0 ppb Copper and compounds 256.0 ppb Nickel and compounds 1780.0 ppb Chromium VI and compounds 4410.0 ppb

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Site ID: UXO 000003

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$3.1M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Sep 2018

This site is under ongoing monitoring until Jan 2048

Contaminated Areas

Soil: Risk Not Evaluated

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Site ID: UXO 000007

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$10M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Aug 2021

This site is under ongoing monitoring until Aug 2052

Contaminated Areas

Sediment (Fresh): Risk Not Evaluated

Sediment (Human): Risk Not Evaluated

Soil: Risk Not Evaluated

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Site ID: UXO 000011

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$3.78M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Mar 2021

This site is under ongoing monitoring until Sep 2050

Contaminated Areas

Sediment (Fresh): Medium Risk

Contaminants: PCBs 11.0 ppb Copper and compounds 96.9 ppb Lead 108.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 180.0 ppb

Sediment (Human): Low Risk

Contaminants: PCBs 11.0 ppb Copper and compounds 96.9 ppb Lead 108.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 180.0 ppb

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Site ID: UXO 000012

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$1.3M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

May 2021

This site is under ongoing monitoring until Oct 2050

Contaminated Areas

Sediment (Fresh): Medium Risk

Contaminants: PCBs 11.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 256.0 ppb

Sediment (Human): Low Risk

Contaminants: PCBs 11.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 256.0 ppb

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Site ID: UXO 000006

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$7.65M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jan 2021

This site is under ongoing monitoring until Oct 2050

Contaminated Areas

Sediment (Fresh): Medium Risk

Contaminants: PCBs 11.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 256.0 ppb

Sediment (Human): Low Risk

Contaminants: PCBs 11.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 256.0 ppb

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Site ID: UXO 000005

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$3.28M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jun 2020

This site is under ongoing monitoring until Feb 2050

Contaminated Areas

Sediment (Fresh): Risk Not Evaluated

Sediment (Human): Risk Not Evaluated

Soil: Risk Not Evaluated

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Site ID: UXO 000014

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$2.63M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Nov 2023

This site is under ongoing monitoring until Jan 2052

Contaminated Areas

Groundwater: Risk Not Evaluated

Sediment (Fresh): Risk Not Evaluated

Sediment (Human): Risk Not Evaluated

Soil: Risk Not Evaluated

Surface Water (Fresh): Risk Not Evaluated

Surface Water (Human): Risk Not Evaluated

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Site ID: SITE 00028

MARE ISLAND NSY

Storage Area

Cost

$424K

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Apr 2016

This site is under ongoing monitoring until Oct 2046

Contaminated Areas

Soil: Medium Risk

Contaminants: Aroclor 1254 20.0 ppb Lead 505.0 ppb

Groundwater: Low Risk

Contaminants: Nickel (Soluble Salts) 17400.0 ppb Arsenic 151000.0 ppb

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Site ID: UXO 000010

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$7.7M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jan 2022

This site is under ongoing monitoring until Dec 2050

Contaminated Areas

Sediment (Fresh): Medium Risk

Contaminants: PCBs 11.0 ppb Lead 134.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 309.0 ppb Copper and compounds 406.0 ppb

Sediment (Human): Low Risk

Contaminants: PCBs 11.0 ppb Lead 134.0 ppb Nickel (Soluble Salts) 136.0 ppb Zinc 309.0 ppb Copper and compounds 406.0 ppb

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Site ID: UXO 000013

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$4.5M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Oct 2018

This site is under ongoing monitoring until Jan 2050

37 Inactive Sites

Sites where military cleanup actions are complete, according to the DOD. Note that this status does not necessarily mean the site is no longer hazardous, as many of these sites are put under long-term monitoring or other restrictions.

Site ID: SITE 00024

MARE ISLAND NSY

Waste Treatment Plant

Cost

Unknown

Final Cleanup Action

Mar 2000

Contaminated Areas

Groundwater: Medium Risk

Contaminants: HCH (beta) 40.0 ppb DDT 100.0 ppb Mercury and compounds (inorganic) 330.0 ppb Heptachlor epoxide 360.0 ppb Vinyl chloride 700.0 ppb Beryllium and compounds 5600.0 ppb Dalapon 6000.0 ppb Silver and compounds 7800.0 ppb Selenium 20200.0 ppb Antimony and compounds 29900.0 ppb Lead 77000.0 ppb Arsenic (cancer) 78400.0 ppb Copper and compounds 100000.0 ppb Vanadium 112000.0 ppb Chromium VI and compounds 116000.0 ppb Nickel and compounds 291000.0 ppb Zinc 350000.0 ppb Barium and compounds 664000.0 ppb Nitrate 2290000.0 ppb Manganese and compounds 10500000.0 ppb Nitrite 20870000.0 ppb Aluminum 36500000.0 ppb Iron 61100000.0 ppb

Soil: Medium Risk

Contaminants: Benzo(b)fluoranthene 0.08 ppb Pyrene 0.2 ppb Fluoranthene 0.2 ppb Chrysene 0.2 ppb Mercury and compounds (inorganic) 0.85 ppb Beryllium and compounds 0.99 ppb Silver and compounds 2.1 ppb Molybdenum 2.8 ppb Cadmium and compounds 3.2 ppb Arsenic (noncancer) 28.8 ppb Vanadium 102.0 ppb Lead 113.0 ppb Barium and compounds 164.0 ppb Nickel and compounds 255.0 ppb Chromium VI and compounds 303.0 ppb Zinc 421.0 ppb Copper and compounds 647.0 ppb Manganese and compounds 1020.0 ppb Aluminum 31700.0 ppb Iron 45900.0 ppb

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Site ID: SITE 00025

MARE ISLAND NSY

Pesticide Shop

Cost

Unknown

Final Cleanup Action

Feb 2002

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Vinyl chloride 1000.0 ppb Arsenic (cancer) 15200.0 ppb Lead 32600.0 ppb

Soil: Medium Risk

Contaminants: Arsenic (cancer) 26.7 ppb Antimony and compounds 64.7 ppb Lead 19400.0 ppb

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Site ID: SITE 00026

MARE ISLAND NSY

Contaminated Buildings

Cost

Unknown

Final Cleanup Action

Dec 2001

Contaminated Areas

Soil: Low Risk

Contaminants: Beryllium and compounds 1.6 ppb Lead 16.8 ppb Manganese 822.0 ppb

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Site ID: SITE 00027

MARE ISLAND NSY

Contaminated Buildings

Cost

Unknown

Final Cleanup Action

Oct 2007

Contaminated Areas

Groundwater: Low Risk

Contaminants: Arsenic (cancer) 8000.0 ppb Manganese 8600000.0 ppb

Soil: Low Risk

Contaminants: Mercury and compounds (inorganic) 0.41 ppb

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Site ID: UST 000002

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Sep 2001

Contaminated Areas

Groundwater: Low Risk

Contaminants: Benzene 1600.0 ppb Toluene 3100.0 ppb Ethylbenzene 8200.0 ppb Xylene (mixed) 71000.0 ppb

Soil: Low Risk

Contaminants: Ethylbenzene 0.03 ppb Xylene (mixed) 0.12 ppb

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Site ID: UST 000003

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Sep 2001

This site is under ongoing monitoring until Sep 2004

Contaminated Areas

Groundwater: Low Risk

Contaminants: Ethylbenzene 2200.0 ppb Toluene 2700.0 ppb Xylene (mixed) 9700.0 ppb Benzene 11000.0 ppb

Soil: Low Risk

Contaminants: Benzene 0.68 ppb Toluene 0.73 ppb Ethylbenzene 3.2 ppb Xylene (mixed) 9.0 ppb

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Site ID: UST 000004

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Sep 2001

Contaminated Areas

Soil: Low Risk

Contaminants: Benzene 0.95 ppb Toluene 1.0 ppb Ethylbenzene 1.6 ppb Xylene (mixed) 16.0 ppb

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Site ID: UST 000005

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Jul 2007

Contaminated Areas

Groundwater: Low Risk

Contaminants: Ethylbenzene 86000.0 ppb Xylene (mixed) 230000.0 ppb

Soil: Low Risk

Contaminants: Benzene 0.88 ppb Toluene 3.1 ppb Ethylbenzene 14.0 ppb Xylene (mixed) 45.0 ppb

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Site ID: UST 000006

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Sep 2001

Contaminated Areas

Groundwater: Risk Not Evaluated

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Site ID: UST 000007

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Jul 1997

Contaminated Areas

Groundwater: Low Risk

Contaminants: Benzene 0.5 ppb

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Site ID: UXO 000002

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

Unknown

Final Cleanup Action

Mar 2002

Contaminated Areas

Sediment (Fresh): High Risk

Contaminants: DDT 0.003 ppb Silver and compounds 2.3 ppb Antimony and compounds 14.6 ppb Chromium 80.9 ppb Nickel (Soluble Salts) 166.0 ppb Zinc 295.0 ppb Copper and compounds 345.0 ppb Lead 834.0 ppb

Sediment (Human): Medium Risk

Contaminants: DDT 0.004 ppb Antimony and compounds 14.6 ppb Nickel (Soluble Salts) 166.0 ppb Copper Cyanide 167.0 ppb Lead 834.0 ppb Zinc 7680.0 ppb

Soil: Medium Risk

Contaminants: Vinyl Chloride 0.3 ppb Lead 64.0 ppb Arsenic 88.5 ppb

Groundwater: Low Risk

Contaminants: Chromium 20000.0 ppb Silver and compounds 24400.0 ppb Vinyl Chloride 60000.0 ppb Arsenic 91700.0 ppb Cadmium and compounds 114000.0 ppb Lead 121000.0 ppb Selenium 179000.0 ppb Antimony and compounds 188000.0 ppb Vanadium 219000.0 ppb Aluminum 1030000.0 ppb Zinc 1700000.0 ppb Trichloroethylene (TCE) 2400000.0 ppb Nickel (Soluble Salts) 2730000.0 ppb Manganese and compounds 11400000.0 ppb Iron 88600000.0 ppb

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Site ID: UXO 000008

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

Unknown

Final Cleanup Action

Oct 2002

Contaminated Areas

Soil: Medium Risk

Contaminants: Benzo(a)Pyrene 0.1 ppb Benzo(j)Fluoranthene 0.6 ppb Selenium 5.9 ppb Antimony and compounds 8.3 ppb Tin 19.5 ppb Arsenic 21.8 ppb Copper and compounds 125.0 ppb Lead 128.0 ppb Vanadium 259.0 ppb Barium 359.0 ppb Nickel (Soluble Salts) 398.0 ppb Zinc 444.0 ppb Chromium 932.0 ppb Manganese and compounds 1800.0 ppb Potassium Silver Cyanide 24700.0 ppb Aluminum 39800.0 ppb Iron 99000.0 ppb

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Site ID: UXO 000009

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

Unknown

Final Cleanup Action

Sep 2002

Contaminated Areas

Sediment (Fresh): High Risk

Contaminants: DDT 0.05 ppb DDE 0.1 ppb DDD 0.4 ppb Antimony and compounds 76.7 ppb Chromium 581.0 ppb Copper and compounds 1370.0 ppb Lead 2080.0 ppb Zinc 7680.0 ppb

Sediment (Human): Medium Risk

Contaminants: Dieldrin 0.008 ppb DDT 0.05 ppb DDE 0.1 ppb Polybrominated Biphenyls 0.2 ppb DDD 0.4 ppb Antimony and compounds 76.7 ppb Chromium 581.0 ppb Copper and compounds 1370.0 ppb Lead 2080.0 ppb Manganese and compounds 5910.0 ppb Zinc 7680.0 ppb Aluminum 38000.0 ppb

Soil: Medium Risk

Contaminants: Arsenic 75.2 ppb

Groundwater: Low Risk

Contaminants: Nickel (Soluble Salts) 323000.0 ppb Manganese and compounds 25300000.0 ppb

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Site ID: UXO 000004

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

$337K

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Mar 2014

This site is under ongoing monitoring until Feb 2045

Contaminated Areas

Groundwater: Low Risk

Contaminants: Selenium 17000.0 ppb Cadmium and compounds 19000.0 ppb Nickel (Soluble Salts) 50000.0 ppb Arsenic 120000.0 ppb

Soil: Low Risk

Contaminants: Antimony and compounds 31.0 ppb Lead 200.0 ppb Copper and compounds 3100.0 ppb

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Site ID: VALLEJOENV

MARE ISLAND NSY

Unknown Site Type

Cost

$5.57M

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Jun 2014

This site is under ongoing monitoring until Dec 2021

Site ID: SITE 00014

MARE ISLAND NSY

Waste Treatment Plant

Cost

Unknown

Final Cleanup Action

Feb 2002

This site is under ongoing monitoring until Sep 2007

Contaminated Areas

Groundwater: Medium Risk

Contaminants: 1,2-Dichloroethane (EDC) 1000.0 ppb Dimethyl phthalate 1000.0 ppb Polychlorinated biphenyls (PCBs) 1000.0 ppb 1,1-Dichloroethylene 1000.0 ppb 1,1,2-Trichloroethane 1000.0 ppb Methyl isobutyl ketone 2000.0 ppb Chlorobenzene 2000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 2000.0 ppb 1,1,2,2-Tetrachloroethane 2000.0 ppb Benzene 4000.0 ppb Dichloroethane, 1,1- 5000.0 ppb Bromodichloromethane 7000.0 ppb Carbon disulfide 9000.0 ppb Styrene 10000.0 ppb Methylene chloride 10000.0 ppb Tetrachloroethylene (PCE) 11000.0 ppb Carbon tetrachloride 16000.0 ppb Chloromethane 16000.0 ppb Methyl ethyl ketone 59000.0 ppb Chromium VI and compounds 60000.0 ppb Chloroform 62000.0 ppb Ethylbenzene 140000.0 ppb Xylene (mixed) 150000.0 ppb Acetone 340000.0 ppb Toluene 440000.0 ppb 1,2-Dichloroethylene (mixture) 1700000.0 ppb Vinyl chloride 2100000.0 ppb Trichloroethylene (TCE) 3000000.0 ppb

Soil: Low Risk

Contaminants: Tin and compounds 13.8 ppb Arsenic (noncancer) 17.22 ppb Nickel and compounds 50.2 ppb Lead 55.8 ppb Copper and compounds 65.67 ppb Vanadium 192.49 ppb Zinc 228.17 ppb Manganese and compounds 696.41 ppb Iron 49850.0 ppb

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Site ID: SITE 00015

MARE ISLAND NSY

Plating Shop

Cost

Unknown

Final Cleanup Action

Aug 2001

Contaminated Areas

Groundwater: Medium Risk

Contaminants: DDE,4,4- 70.0 ppb Benzene 700.0 ppb Carbon tetrachloride 1000.0 ppb Methylene chloride 1000.0 ppb 1,1-Dichloroethylene 1000.0 ppb Mercury and compounds (inorganic) 1100.0 ppb Xylene (mixed) 1200.0 ppb Methyl isobutyl ketone 2000.0 ppb 1,3-Dichlorobenzene 2000.0 ppb Bromodichloromethane 2000.0 ppb Dichloroethane, 1,1- 2000.0 ppb Beryllium and compounds 2200.0 ppb Toluene 3000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 3000.0 ppb 1,1,1-Trichloroethane 5000.0 ppb Cadmium and compounds 6000.0 ppb Selenium 6000.0 ppb Antimony and compounds 11100.0 ppb Dalapon 11500.0 ppb Arsenic (cancer) 12800.0 ppb Acetone 25000.0 ppb Lead 25900.0 ppb Chloroform 27000.0 ppb Molybdenum 28500.0 ppb Vinyl chloride 36000.0 ppb Copper and compounds 112000.0 ppb Vanadium 149000.0 ppb Trichloroethylene (TCE) 240000.0 ppb Zinc 371000.0 ppb 1,2-Dichloroethylene (mixture) 540000.0 ppb Tetrachloroethylene (PCE) 620000.0 ppb Nickel and compounds 1090000.0 ppb Barium and compounds 1220000.0 ppb Manganese and compounds 6740000.0 ppb Nitrate 20100000.0 ppb Nitrite 27200000.0 ppb Aluminum 35600000.0 ppb Iron 79900000.0 ppb

Soil: Medium Risk

Contaminants: Methyl ethyl ketone 0.01 ppb Acetone 0.05 ppb Beryllium and compounds 0.34 ppb Cadmium and compounds 0.52 ppb Arsenic (noncancer) 4.4 ppb Antimony and compounds 4.79 ppb Tin and compounds 46.79 ppb Nickel and compounds 50.21 ppb Vanadium 111.53 ppb Zinc 232.51 ppb Barium and compounds 309.0 ppb Lead 470.29 ppb Copper and compounds 641.23 ppb Manganese and compounds 1804.57 ppb Aluminum 15200.0 ppb Iron 41860.0 ppb

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Site ID: SITE 00019

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

Nov 2001

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Heptachlor epoxide 90.0 ppb Heptachlor 130.0 ppb HCH -technical 180.0 ppb Mercury and compounds (inorganic) 670.0 ppb Benzene 2000.0 ppb 2-Methylphenol 2000.0 ppb Ethylbenzene 3000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 3000.0 ppb 1,4-Dichlorobenzene 4000.0 ppb Acenaphthene 4000.0 ppb Toluene 5000.0 ppb 1,1,1-Trichloroethane 5000.0 ppb Beryllium and compounds 5700.0 ppb 1,2-Dichloropropane 9000.0 ppb Fluorene 9000.0 ppb 1,2-Dichlorobenzene 9000.0 ppb Lead 11900.0 ppb Copper and compounds 13600.0 ppb 4-Methylphenol 14000.0 ppb Chlorobenzene 14000.0 ppb Xylene (mixed) 18000.0 ppb Cadmium and compounds 19200.0 ppb Antimony and compounds 19300.0 ppb Nickel and compounds 26700.0 ppb Selenium 26900.0 ppb Arsenic (cancer) 52300.0 ppb Methyl isobutyl ketone 54000.0 ppb Molybdenum 55600.0 ppb Methylnaphthalene,2 59000.0 ppb 2,4-Dimethylphenol 68000.0 ppb Dichloroethane, 1,1- 120000.0 ppb 1,2-Dichloroethylene (mixture) 130000.0 ppb Trichloroethylene (TCE) 130000.0 ppb Barium and compounds 150000.0 ppb Ethyl chloride 160000.0 ppb Vanadium 162000.0 ppb Tetrachloroethylene (PCE) 220000.0 ppb Zinc 272000.0 ppb Methylene chloride 300000.0 ppb Aluminum 2020000.0 ppb Nitrite 3730000.0 ppb Manganese and compounds 7170000.0 ppb Iron 32400000.0 ppb

Soil: Low Risk

Contaminants: Acetone 0.01 ppb Methylene chloride 0.01 ppb Toluene 0.1 ppb Polychlorinated biphenyls (PCBs) 0.1 ppb Phenol 0.3 ppb Fluoride 1.8 ppb Selenium 2.4 ppb Beryllium and compounds 2.7 ppb Arsenic (noncancer) 15.9 ppb Nitrate 26.5 ppb Mercury and compounds (inorganic) 32.2 ppb Silver and compounds 71.6 ppb Vanadium 120.79 ppb Antimony and compounds 154.0 ppb Tin and compounds 283.69 ppb Cadmium and compounds 530.0 ppb Manganese and compounds 1264.07 ppb Molybdenum 2300.0 ppb Barium and compounds 7380.0 ppb Nickel and compounds 8610.0 ppb Lead 9450.0 ppb Aluminum 19000.0 ppb Zinc 19300.0 ppb Copper and compounds 41600.0 ppb Iron 54020.0 ppb

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Site ID: UST 000018

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

May 2002

This site is under ongoing monitoring until Mar 2010

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Benzene 100000.0 ppb Toluene 310000.0 ppb Xylene (mixed) 520000.0 ppb Ethylbenzene 790000.0 ppb

Soil: Low Risk

Contaminants: Ethylbenzene 2.1 ppb Toluene 3.7 ppb Xylene (mixed) 28.0 ppb

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Site ID: SITE 00008

MARE ISLAND NSY

Storage Area

Cost

Unknown

Final Cleanup Action

May 2000

Contaminated Areas

Soil: High Risk

Contaminants: Silver and compounds 4.78 ppb Tin and compounds 14.07 ppb Nickel and compounds 55.92 ppb Copper and compounds 85.54 ppb Zinc 122.68 ppb Vanadium 157.54 ppb Manganese and compounds 1460.0 ppb Iron 49330.0 ppb Lead 274000.0 ppb

Groundwater: Medium Risk

Contaminants: Cadmium and compounds 220.0 ppb Mercury and compounds (inorganic) 1800.0 ppb 2,6-Dinitrotoluene 2000.0 ppb Xylene (mixed) 3000.0 ppb Ethylbenzene 4000.0 ppb Selenium 5100.0 ppb Toluene 7000.0 ppb Beryllium and compounds 11700.0 ppb Acetone 13000.0 ppb Copper and compounds 25300.0 ppb Nickel and compounds 31400.0 ppb Arsenic (cancer) 45800.0 ppb Antimony and compounds 69800.0 ppb Zinc 304000.0 ppb Vanadium 382000.0 ppb Nitrate 450000.0 ppb Lead 1290000.0 ppb Barium and compounds 1620000.0 ppb Manganese and compounds 7220000.0 ppb Aluminum 7510000.0 ppb Iron 72700000.0 ppb Nitrite 500000000.0 ppb

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Site ID: SITE 00012

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

Aug 2002

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Mercury and compounds (inorganic) 200.0 ppb Beryllium and compounds 200.0 ppb Cadmium and compounds 220.0 ppb Methylene chloride 600.0 ppb Arochlor 1016 1200.0 ppb Dieldrin 2700.0 ppb Chlorobenzene 3000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 4000.0 ppb Arsenic (cancer) 6800.0 ppb 1,2-Dichlorobenzene 21000.0 ppb Vanadium 24600.0 ppb Nickel and compounds 26900.0 ppb Lead 66200.0 ppb 1,3-Dichlorobenzene 130000.0 ppb Copper and compounds 162000.0 ppb Zinc 164000.0 ppb 1,4-Dichlorobenzene 210000.0 ppb Polychlorinated biphenyls (PCBs) 392000.0 ppb Barium and compounds 477000.0 ppb 1,2,4-Trichlorobenzene 920000.0 ppb Manganese and compounds 4670000.0 ppb Aluminum 7850000.0 ppb Iron 10500000.0 ppb

Soil: Low Risk

Contaminants: Methyl ethyl ketone 0.01 ppb Acetone 0.03 ppb Ethylbenzene 0.04 ppb Polychlorinated biphenyls (PCBs) 0.06 ppb Phenol 0.13 ppb Beryllium and compounds 0.52 ppb Antimony and compounds 1.4 ppb Cadmium and compounds 2.2 ppb Mercury and compounds (inorganic) 7.0 ppb Arsenic (noncancer) 11.6 ppb Vanadium 41.3 ppb Nickel and compounds 51.6 ppb Copper and compounds 68.4 ppb Barium and compounds 222.0 ppb Manganese and compounds 819.0 ppb Lead 1260.0 ppb Zinc 1430.0 ppb Aluminum 15200.0 ppb Iron 26700.0 ppb

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Site ID: SITE 00001

MARE ISLAND NSY

Landfill

Cost

Unknown

Final Cleanup Action

Sep 2001

Contaminated Areas

Soil: High Risk

Contaminants: Methyl isobutyl ketone 0.01 ppb Aldrin 0.01 ppb Chlordane, gamma- 0.01 ppb Methylene chloride 0.01 ppb Endosulfan 0.02 ppb DDE,4,4- 0.02 ppb Toluene 0.03 ppb DDD,4,4- 0.03 ppb Trichloroethylene (TCE) 0.03 ppb Methoxychlor 0.04 ppb Naphthalene 0.04 ppb DDT 0.05 ppb Acetone 0.05 ppb Anthracene 0.06 ppb Acenaphthene 0.07 ppb Isophorone 0.11 ppb Dibenz[ah]anthracene 0.13 ppb Dieldrin 0.14 ppb Benz(a)anthracene 0.18 ppb Benzo[k]fluoranthene 0.2 ppb Dibutyl phthalate 0.22 ppb Pyrene 0.25 ppb Dimethyl phthalate 0.25 ppb Fluoranthene 0.25 ppb Diethyl phthalate 0.25 ppb 4-Methylphenol 0.28 ppb Xylene (mixed) 0.29 ppb Benzo[a]pyrene 0.33 ppb Methylnaphthalene,2 0.33 ppb Chrysene 0.35 ppb Indeno[1,2,3-cd]pyrene 0.56 ppb Benzo[b]fluoranthene 0.63 ppb Bis(2-ethylhexyl)phthalate (DEHP) 0.7 ppb Selenium 1.2 ppb Phenol 1.8 ppb Butyl benzyl phthalate 1.9 ppb Benzoic acid 2.1 ppb Beryllium and compounds 2.9 ppb Molybdenum 5.4 ppb Mercury and compounds (inorganic) 9.0 ppb Cadmium and compounds 9.88 ppb Polychlorinated biphenyls (PCBs) 18.7 ppb Arsenic (noncancer) 22.9 ppb Tin and compounds 100.14 ppb Silver and compounds 148.49 ppb Vanadium 202.0 ppb Barium and compounds 735.0 ppb Lead 949.69 ppb Manganese and compounds 1340.0 ppb Nickel and compounds 1610.0 ppb Copper and compounds 2316.71 ppb Zinc 2400.0 ppb Antimony and compounds 4300.0 ppb Aluminum 37300.0 ppb Iron 72760.0 ppb

Groundwater: Medium Risk

Contaminants: Chlordane 50.0 ppb Heptachlor epoxide 70.0 ppb HCH (beta) 70.0 ppb Heptachlor 180.0 ppb DDT 360.0 ppb DDD,4,4- 370.0 ppb Endosulfan 400.0 ppb Dibromochloromethane 600.0 ppb Tetrachloroethylene (PCE) 700.0 ppb Carbon disulfide 1000.0 ppb Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) 1120.0 ppb Methyl isobutyl ketone 2000.0 ppb Vinyl chloride 2000.0 ppb 1,3-Dichlorobenzene 3000.0 ppb Chloromethane 3000.0 ppb Butyl benzyl phthalate 3000.0 ppb Bromodichloromethane 4000.0 ppb 1,2-Dichlorobenzene 4000.0 ppb 1,2-Dichloroethylene (mixture) 5000.0 ppb Dichloroethane, 1,1- 5000.0 ppb N-Nitrosodiphenylamine 5000.0 ppb Carbazole 5000.0 ppb 2,6-Dinitrotoluene 6000.0 ppb Fluorene 7000.0 ppb 1,4-Dichlorobenzene 9000.0 ppb Polychlorinated biphenyls (PCBs) 9000.0 ppb 4-Nitrophenol 10000.0 ppb 1,1,1-Trichloroethane 10000.0 ppb 2,4,6-Trichlorophenol 10000.0 ppb Cyanide (free) 11000.0 ppb Chloroform 12000.0 ppb Methylnaphthalene,2 12000.0 ppb Mercury and compounds (inorganic) 14900.0 ppb Dalapon 14900.0 ppb Dinoseb 15000.0 ppb Beryllium and compounds 20000.0 ppb Chromium VI and compounds 20000.0 ppb Acenaphthene 24000.0 ppb Trichloroethylene (TCE) 40000.0 ppb Chlorobenzene 45000.0 ppb Ethyl chloride 59000.0 ppb Methylene chloride 64000.0 ppb Styrene 88000.0 ppb Cadmium and compounds 89200.0 ppb Toluene 110000.0 ppb Naphthalene 110000.0 ppb 2,4-Dimethylphenol 140000.0 ppb Molybdenum 143000.0 ppb Silver and compounds 162000.0 ppb Selenium 186000.0 ppb Acetone 190000.0 ppb 2-Methylphenol 260000.0 ppb 4-Methylphenol 330000.0 ppb Benzene 410000.0 ppb Methyl ethyl ketone 410000.0 ppb Arsenic (cancer) 567000.0 ppb Ethylbenzene 710000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 720000.0 ppb Vanadium 785000.0 ppb Antimony and compounds 1080000.0 ppb Phenol 1200000.0 ppb Nickel and compounds 1320000.0 ppb Lead 2310000.0 ppb Copper and compounds 2910000.0 ppb Xylene (mixed) 3300000.0 ppb Barium and compounds 6320000.0 ppb Zinc 6960000.0 ppb Manganese and compounds 53800000.0 ppb Aluminum 81200000.0 ppb Nitrate 141000000.0 ppb Iron 258000000.0 ppb Nitrite 1320000000.0 ppb

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Site ID: SITE 00005

MARE ISLAND NSY

Explosive Ordnance Disposal Area

Cost

Unknown

Final Cleanup Action

Mar 2002

This site is under ongoing monitoring until May 2003

Contaminated Areas

Sediment (Human): High Risk

Contaminants: Tin and compounds 14.9 ppb Lead 35.6 ppb Nickel and compounds 113.0 ppb Vanadium 166.0 ppb Chromium VI and compounds 181.0 ppb Zinc 310.0 ppb Copper and compounds 385.0 ppb Manganese and compounds 1000.0 ppb Iron 54500.0 ppb

Soil: High Risk

Contaminants: Mercury and compounds (inorganic) 1.9 ppb Beryllium and compounds 2.3 ppb RDX 3.0 ppb Cadmium and compounds 3.5 ppb Silver and compounds 4.0 ppb Molybdenum 5.1 ppb Antimony and compounds 14.6 ppb Arsenic (cancer) 28.8 ppb Tin and compounds 47.4 ppb Nickel and compounds 143.0 ppb Vanadium 200.0 ppb Lead 524.0 ppb Copper and compounds 715.0 ppb Barium and compounds 1210.0 ppb Zinc 1350.0 ppb Manganese 1740.0 ppb Aluminum 32800.0 ppb Iron 64600.0 ppb

Sediment (Marine): High Risk

Contaminants: Lead 35.6 ppb Nickel and compounds 113.0 ppb Chromium VI and compounds 181.0 ppb Zinc 310.0 ppb Copper and compounds 385.0 ppb

Groundwater: Medium Risk

Contaminants: Mercury and compounds (inorganic) 890.0 ppb Beryllium and compounds 1300.0 ppb Molybdenum 14700.0 ppb Dalapon 22000.0 ppb Copper and compounds 61000.0 ppb Chromium VI and compounds 72900.0 ppb Arsenic (cancer) 91700.0 ppb Cadmium and compounds 114000.0 ppb Lead 121000.0 ppb Selenium 179000.0 ppb Antimony and compounds 188000.0 ppb Barium and compounds 544000.0 ppb Aluminum 1030000.0 ppb Nickel and compounds 2730000.0 ppb Manganese and compounds 11400000.0 ppb Iron 49800000.0 ppb

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Site ID: UST 000001

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Sep 2001

Contaminated Areas

Groundwater: Low Risk

Contaminants: Xylene (mixed) 2000.0 ppb Toluene 3800.0 ppb

Soil: Low Risk

Contaminants: Benzene 0.04 ppb Toluene 0.37 ppb Ethylbenzene 0.66 ppb Xylene (mixed) 2.1 ppb

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Site ID: SITE 00002

MARE ISLAND NSY

Landfill

Cost

Unknown

Final Cleanup Action

Jan 2001

Contaminated Areas

Soil: High Risk

Contaminants: Benzene 0.12 ppb Toluene 0.13 ppb Ethylbenzene 0.64 ppb Xylene (mixed) 2.42 ppb Polychlorinated biphenyls (PCBs) 3.0 ppb Silver and compounds 5.31 ppb Cadmium and compounds 22.61 ppb Molybdenum 47.72 ppb Mercury and compounds (inorganic) 142.49 ppb Antimony and compounds 174.8 ppb Vanadium 710.45 ppb Lead 1327.58 ppb Manganese and compounds 1365.94 ppb Nickel and compounds 2408.1 ppb Tin and compounds 3531.1 ppb Copper and compounds 7952.61 ppb Zinc 13098.0 ppb Iron 196230.0 ppb

Groundwater: Medium Risk

Contaminants: Chlordane, gamma- 30.0 ppb Heptachlor epoxide 60.0 ppb Endosulfan 160.0 ppb DDE,4,4- 160.0 ppb Dieldrin 240.0 ppb Toluene 900.0 ppb Beryllium and compounds 1100.0 ppb 1,2-Dichloroethylene (mixture) 2000.0 ppb Mercury and compounds (inorganic) 2300.0 ppb 1,3,5-Trinitrobenzene 2460.0 ppb Ethylbenzene 3000.0 ppb 1,4-Dichlorobenzene 3000.0 ppb Chlorobenzene 3000.0 ppb Benzene 4000.0 ppb Polychlorinated biphenyls (PCBs) 4140.0 ppb 1,2-Dichlorobenzene 5000.0 ppb 1,3-Dichlorobenzene 6000.0 ppb Xylene (mixed) 7000.0 ppb Molybdenum 9000.0 ppb Methyl ethyl ketone 9000.0 ppb Chrysene 11000.0 ppb Vanadium 14900.0 ppb Fluorene 23000.0 ppb Naphthalene 24000.0 ppb Nickel and compounds 28800.0 ppb Methylnaphthalene,2 67000.0 ppb Nitrate 68000.0 ppb Arsenic (cancer) 79000.0 ppb Copper and compounds 135000.0 ppb Lead 176000.0 ppb Zinc 427000.0 ppb Manganese and compounds 1260000.0 ppb Barium and compounds 2270000.0 ppb Aluminum 4630000.0 ppb Nitrite 6020000.0 ppb Iron 27400000.0 ppb

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Site ID: SITE 00003

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

May 2003

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Heptachlor epoxide 60.0 ppb HCH -technical 80.0 ppb DDT 100.0 ppb HCH (alpha) 140.0 ppb Tetrachloroethylene (PCE) 500.0 ppb Methoxychlor 600.0 ppb Chlorobenzene 800.0 ppb Dichloroethane, 1,1- 800.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 1000.0 ppb Methylene chloride 2000.0 ppb Carbon disulfide 2000.0 ppb Trichloroethylene (TCE) 3000.0 ppb Mercury and compounds (inorganic) 3300.0 ppb Dibromochloromethane 4000.0 ppb Beryllium and compounds 7800.0 ppb Acetone 9000.0 ppb 2,6-Dinitrotoluene 11000.0 ppb 2,4-Dinitrotoluene 12000.0 ppb Bromodichloromethane 14000.0 ppb Dalapon 14500.0 ppb Cadmium and compounds 19800.0 ppb Molybdenum 21100.0 ppb 1,2-Dichloroethylene (mixture) 23000.0 ppb Chloroform 35000.0 ppb Vinyl chloride 35000.0 ppb Ethylbenzene 36000.0 ppb Antimony and compounds 42500.0 ppb Indeno[1,2,3-cd]pyrene 83000.0 ppb Acenaphthene 85000.0 ppb Benzene 97000.0 ppb N-Nitrosodiphenylamine 100000.0 ppb Selenium 102000.0 ppb Toluene 140000.0 ppb Copper and compounds 200000.0 ppb Xylene (mixed) 240000.0 ppb Arsenic (cancer) 275000.0 ppb Vanadium 302000.0 ppb Lead 303000.0 ppb Zinc 603000.0 ppb Benzo[k]fluoranthene 880000.0 ppb Chrysene 980000.0 ppb Benzo[a]pyrene 1000000.0 ppb Benzo[b]fluoranthene 1100000.0 ppb Benz(a)anthracene 1200000.0 ppb Nickel and compounds 1270000.0 ppb Barium and compounds 1820000.0 ppb Fluoranthene 2000000.0 ppb Pyrene 2200000.0 ppb Nitrate 2390000.0 ppb Fluorene 4200000.0 ppb Manganese and compounds 4300000.0 ppb Nitrite 23800000.0 ppb Naphthalene 27000000.0 ppb Methylnaphthalene,2 41000000.0 ppb Aluminum 52600000.0 ppb Iron 144000000.0 ppb

Soil: Low Risk

Contaminants: Acetone 0.02 ppb Methylene chloride 0.02 ppb Beryllium and compounds 0.53 ppb Molybdenum 0.54 ppb Cadmium and compounds 2.3 ppb Phenol 3.0 ppb Antimony and compounds 4.05 ppb Arsenic (noncancer) 10.3 ppb Tin and compounds 12.4 ppb Lead 13.79 ppb Nickel and compounds 30.53 ppb Barium and compounds 105.0 ppb Zinc 109.4 ppb Vanadium 109.46 ppb Copper and compounds 275.93 ppb Manganese and compounds 378.08 ppb Aluminum 8890.0 ppb Iron 36320.0 ppb

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Site ID: SITE 00006

MARE ISLAND NSY

Waste Treatment Plant

Cost

Unknown

Final Cleanup Action

Jul 2001

Contaminated Areas

Soil: High Risk

Contaminants: Cadmium and compounds 12.4 ppb Arsenic (cancer) 24.9 ppb Antimony and compounds 90.2 ppb Lead 1460.0 ppb Manganese and compounds 1730.0 ppb Nickel and compounds 2230.0 ppb Copper and compounds 13100.0 ppb Aluminum 30400.0 ppb Iron 125000.0 ppb

Groundwater: Medium Risk

Contaminants: Beryllium and compounds 6700.0 ppb Mercury and compounds (methyl) 23200.0 ppb Vanadium 527000.0 ppb Arsenic (cancer) 1220000.0 ppb Lead 1860000.0 ppb Manganese 633000000.0 ppb

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Site ID: SITE 00007

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

Sep 2002

Contaminated Areas

Soil: High Risk

Contaminants: Fluoride 0.7 ppb Mercury and compounds (inorganic) 1.7 ppb Arsenic (noncancer) 13.0 ppb Antimony and compounds 26.7 ppb Nitrate 27.9 ppb Vanadium 56.8 ppb Nickel and compounds 85.8 ppb Copper and compounds 94.4 ppb Zinc 215.0 ppb Barium and compounds 388.0 ppb Lead 21300.0 ppb

Groundwater: Medium Risk

Contaminants: Heptachlor epoxide 50.0 ppb Mercury and compounds (inorganic) 280.0 ppb Styrene 500.0 ppb Tetrachloroethylene (PCE) 500.0 ppb Carbon disulfide 800.0 ppb Methylene chloride 900.0 ppb Ethylbenzene 2000.0 ppb Vinyl chloride 3000.0 ppb 1,2-Dichloroethylene (mixture) 4000.0 ppb Silver and compounds 5700.0 ppb Chloroform 6000.0 ppb Trichloroethylene (TCE) 7000.0 ppb 1,1,2,2-Tetrachloroethane 9000.0 ppb Chromium VI and compounds 10000.0 ppb Acetone 11000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 15000.0 ppb Xylene (mixed) 17000.0 ppb Cadmium and compounds 17200.0 ppb Molybdenum 20000.0 ppb Selenium 22900.0 ppb Beryllium and compounds 44400.0 ppb Antimony and compounds 53700.0 ppb Lead 79000.0 ppb Vanadium 144000.0 ppb Arsenic (cancer) 151000.0 ppb Copper and compounds 246000.0 ppb Barium and compounds 258000.0 ppb Nickel and compounds 2100000.0 ppb Zinc 2370000.0 ppb Nitrite 21850000.0 ppb Manganese and compounds 30200000.0 ppb Aluminum 199000000.0 ppb Nitrate 213000000.0 ppb Iron 926000000.0 ppb

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Site ID: SITE 00009

MARE ISLAND NSY

Storage Area

Cost

Unknown

Final Cleanup Action

Jul 2002

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Chlordane, gamma- 150.0 ppb Mercury and compounds (inorganic) 200.0 ppb 1,1,1-Trichloroethane 600.0 ppb Chloromethane 600.0 ppb Methylene chloride 600.0 ppb 1,2-Dichloroethane (EDC) 1000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 2000.0 ppb Methylnaphthalene,2 4000.0 ppb Acetone 5000.0 ppb Selenium 11000.0 ppb Trichloroethylene (TCE) 11000.0 ppb Naphthalene 14000.0 ppb Hexachloroethane 18000.0 ppb Vinyl chloride 20000.0 ppb 1,2-Dichloroethylene (mixture) 23000.0 ppb Arsenic (cancer) 34600.0 ppb Antimony and compounds 44400.0 ppb Beryllium and compounds 51600.0 ppb Cadmium and compounds 54000.0 ppb Carbon disulfide 120000.0 ppb Tetrachloroethylene (PCE) 130000.0 ppb Molybdenum 217000.0 ppb Lead 236000.0 ppb Copper and compounds 268000.0 ppb Toluene 380000.0 ppb Zinc 383000.0 ppb Nickel and compounds 434000.0 ppb Vanadium 537000.0 ppb Nitrite 1650000.0 ppb Barium and compounds 1990000.0 ppb Ethylbenzene 3400000.0 ppb Manganese and compounds 3880000.0 ppb Nitrate 4600000.0 ppb Aluminum 8080000.0 ppb Xylene (mixed) 9800000.0 ppb Iron 12900000.0 ppb

Soil: Low Risk

Contaminants: Xylene (mixed) 0.01 ppb Acetone 0.03 ppb Beryllium and compounds 0.25 ppb Benzo[b]fluoranthene 0.34 ppb Antimony and compounds 0.84 ppb Phenol 1.3 ppb Cadmium and compounds 2.7 ppb Mercury and compounds (inorganic) 4.8 ppb Arsenic (noncancer) 5.4 ppb Nickel and compounds 29.5 ppb Copper and compounds 67.7 ppb Barium and compounds 102.0 ppb Lead 128.0 ppb Vanadium 136.0 ppb Zinc 245.0 ppb Manganese and compounds 735.0 ppb Aluminum 19400.0 ppb Iron 41400.0 ppb

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Site ID: SITE 00010

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

Sep 2001

This site is under ongoing monitoring until Nov 2002

Contaminated Areas

Soil: High Risk

Contaminants: Methylene chloride 0.02 ppb Methyl ethyl ketone 0.02 ppb Chlordane 0.04 ppb DDD,4,4- 0.04 ppb Chrysene 0.11 ppb Benzo[b]fluoranthene 0.13 ppb Benzo[k]fluoranthene 0.16 ppb Benzo[a]pyrene 0.17 ppb Acetone 0.18 ppb Butyl benzyl phthalate 0.27 ppb Selenium 0.69 ppb Beryllium and compounds 0.89 ppb Silver and compounds 0.94 ppb Polychlorinated biphenyls (PCBs) 1.48 ppb Phenol 1.8 ppb Mercury and compounds (inorganic) 2.5 ppb Molybdenum 3.2 ppb Cadmium and compounds 3.25 ppb Antimony and compounds 4.89 ppb Bis(2-ethylhexyl)phthalate (DEHP) 6.1 ppb Tin and compounds 19.38 ppb Arsenic (noncancer) 28.3 ppb Nickel and compounds 123.6 ppb Copper and compounds 134.29 ppb Lead 193.0 ppb Vanadium 193.47 ppb Barium and compounds 197.0 ppb Zinc 395.0 ppb Manganese and compounds 1250.0 ppb Aluminum 30400.0 ppb Iron 60180.0 ppb

Groundwater: Low Risk

Contaminants: Acetone 8000.0 ppb Butyl benzyl phthalate 9000.0 ppb

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Site ID: SITE 00011

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

May 2001

Contaminated Areas

Groundwater: Low Risk

Contaminants: DDD,4,4- 260.0 ppb DDE,4,4- 590.0 ppb Bromodichloromethane 900.0 ppb 1,1,1-Trichloroethane 1000.0 ppb Dichloroethane, 1,1- 1000.0 ppb Molybdenum 2400.0 ppb Lead 2700.0 ppb Selenium 2900.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 3000.0 ppb 1,1-Dichloroethylene 3000.0 ppb Nickel and compounds 3200.0 ppb Tetrachloroethylene (PCE) 4000.0 ppb Vinyl chloride 4000.0 ppb Antimony and compounds 5400.0 ppb Vanadium 5500.0 ppb Chloroform 6000.0 ppb Acetone 8000.0 ppb Copper and compounds 13400.0 ppb 1,2-Dichloroethylene (mixture) 28000.0 ppb Zinc 39100.0 ppb Manganese and compounds 42400.0 ppb Barium and compounds 102000.0 ppb Trichloroethylene (TCE) 190000.0 ppb Aluminum 1310000.0 ppb Iron 2210000.0 ppb

Soil: Low Risk

Contaminants: Methyl ethyl ketone 0.01 ppb Acetone 0.04 ppb Bis(2-ethylhexyl)phthalate (DEHP) 0.12 ppb Beryllium and compounds 0.47 ppb Phenol 0.81 ppb Antimony and compounds 8.27 ppb Arsenic (noncancer) 10.8 ppb Cadmium and compounds 10.91 ppb Silver and compounds 11.2 ppb Polychlorinated biphenyls (PCBs) 19.38 ppb Tin and compounds 42.6 ppb Nickel and compounds 84.92 ppb Vanadium 125.87 ppb Barium and compounds 266.0 ppb Copper and compounds 390.15 ppb Lead 417.95 ppb Manganese and compounds 722.75 ppb Zinc 1051.03 ppb Aluminum 7540.0 ppb Iron 38670.0 ppb

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Site ID: SITE 00013

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

Jan 2002

Contaminated Areas

Soil: High Risk

Contaminants: Toluene 0.05 ppb Xylene (mixed) 0.12 ppb Mercury and compounds (inorganic) 0.22 ppb Polychlorinated biphenyls (PCBs) 0.28 ppb Chromium VI and compounds 0.42 ppb Beryllium and compounds 0.64 ppb Molybdenum 3.9 ppb Antimony and compounds 4.23 ppb Arsenic (noncancer) 9.7 ppb Tin and compounds 11.76 ppb Nickel and compounds 65.36 ppb Vanadium 116.96 ppb Lead 117.0 ppb Copper and compounds 130.0 ppb Barium and compounds 172.0 ppb Zinc 221.0 ppb Manganese and compounds 704.54 ppb Aluminum 26700.0 ppb Iron 40120.0 ppb

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Site ID: SITE 00018

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Jun 2003

Contaminated Areas

Groundwater: Medium Risk

Contaminants: DDT 80.0 ppb Chloromethane 800.0 ppb Ethyl chloride 800.0 ppb 1,2-Dichloroethylene (mixture) 2000.0 ppb Carbon disulfide 2000.0 ppb Fluorene 2000.0 ppb Beryllium and compounds 2200.0 ppb Chloroform 3000.0 ppb Carbazole 3000.0 ppb Acenaphthene 4000.0 ppb Antimony and compounds 5100.0 ppb Toluene 6000.0 ppb Molybdenum 10300.0 ppb Acetone 14000.0 ppb Selenium 15600.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 19000.0 ppb Nickel and compounds 21100.0 ppb Copper and compounds 23300.0 ppb Phenol 27000.0 ppb Lead 30000.0 ppb Naphthalene 45000.0 ppb Cadmium and compounds 46600.0 ppb Methylnaphthalene,2 51000.0 ppb Vanadium 119000.0 ppb Xylene (mixed) 130000.0 ppb Ethylbenzene 210000.0 ppb Barium and compounds 238000.0 ppb Benzene 250000.0 ppb Zinc 250000.0 ppb Arsenic (cancer) 455000.0 ppb Nitrate 1800000.0 ppb Manganese and compounds 5110000.0 ppb Aluminum 8100000.0 ppb Iron 73500000.0 ppb Nitrite 2000000000.0 ppb

Soil: Low Risk

Contaminants: Toluene 0.06 ppb Fluoranthene 0.06 ppb Pyrene 0.07 ppb Ethylbenzene 0.08 ppb Xylene (mixed) 0.09 ppb Phenol 0.38 ppb Cadmium and compounds 0.48 ppb Mercury and compounds (inorganic) 0.51 ppb Beryllium and compounds 1.3 ppb Silver and compounds 2.81 ppb Antimony and compounds 12.0 ppb Tin and compounds 18.85 ppb Arsenic (noncancer) 18.97 ppb Lead 55.21 ppb Nickel and compounds 57.08 ppb Vanadium 176.54 ppb Barium and compounds 267.0 ppb Zinc 474.0 ppb Manganese and compounds 766.27 ppb Copper and compounds 1262.46 ppb Aluminum 21500.0 ppb Iron 85220.0 ppb

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Site ID: SITE 00020

MARE ISLAND NSY

Storage Area

Cost

Unknown

Final Cleanup Action

Dec 2000

This site is under ongoing monitoring until Mar 2002

Contaminated Areas

Soil: High Risk

Contaminants: Fluoride 0.7 ppb Mercury and compounds (inorganic) 1.7 ppb Arsenic (noncancer) 13.0 ppb Antimony and compounds 26.7 ppb Nitrate 27.9 ppb Vanadium 56.8 ppb Nickel and compounds 85.8 ppb Copper and compounds 94.4 ppb Zinc 215.0 ppb Barium and compounds 388.0 ppb Lead 21300.0 ppb

Groundwater: Medium Risk

Contaminants: Heptachlor epoxide 50.0 ppb Mercury and compounds (inorganic) 280.0 ppb Styrene 500.0 ppb Tetrachloroethylene (PCE) 500.0 ppb Carbon disulfide 800.0 ppb Methylene chloride 900.0 ppb Ethylbenzene 2000.0 ppb Vinyl chloride 3000.0 ppb 1,2-Dichloroethylene (mixture) 4000.0 ppb Silver and compounds 5700.0 ppb Chloroform 6000.0 ppb Trichloroethylene (TCE) 7000.0 ppb 1,1,2,2-Tetrachloroethane 9000.0 ppb Chromium VI and compounds 10000.0 ppb Acetone 11000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 15000.0 ppb Xylene (mixed) 17000.0 ppb Cadmium and compounds 17200.0 ppb Molybdenum 20000.0 ppb Selenium 22900.0 ppb Beryllium and compounds 44400.0 ppb Antimony and compounds 53700.0 ppb Lead 79000.0 ppb Vanadium 144000.0 ppb Arsenic (cancer) 151000.0 ppb Copper and compounds 246000.0 ppb Barium and compounds 258000.0 ppb Nickel and compounds 2100000.0 ppb Zinc 2370000.0 ppb Nitrite 21850000.0 ppb Manganese and compounds 30200000.0 ppb Aluminum 199000000.0 ppb Nitrate 213000000.0 ppb Iron 926000000.0 ppb

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Site ID: SITE 00021

MARE ISLAND NSY

Spill Site Area

Cost

Unknown

Final Cleanup Action

Aug 2002

This site is under ongoing monitoring until May 2003

Contaminated Areas

Groundwater: Medium Risk

Contaminants: Beryllium and compounds 1000.0 ppb Molybdenum 32800.0 ppb Lead 45400.0 ppb Manganese 1500000.0 ppb

Soil: Low Risk

Contaminants: Cadmium and compounds 7.1 ppb Nickel and compounds 92.1 ppb Vanadium 218.0 ppb Manganese 1020.0 ppb Lead 1640.0 ppb Zinc 3390.0 ppb

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Site ID: SITE 00022

MARE ISLAND NSY

Unexploded Munitions and Ordnance Area

Cost

Unknown

Final Cleanup Action

Sep 2001

Contaminated Areas

Soil: Low Risk

Contaminants: DDD,4,4- 0.01 ppb DDE,4,4- 0.02 ppb Polychlorinated biphenyls (PCBs) 0.05 ppb DDT 0.06 ppb Mercury and compounds (inorganic) 0.17 ppb Selenium 0.28 ppb Beryllium and compounds 0.91 ppb Silver and compounds 3.45 ppb Cadmium and compounds 5.61 ppb Arsenic (noncancer) 9.0 ppb Antimony and compounds 23.58 ppb Tin and compounds 44.64 ppb Nickel and compounds 64.19 ppb Vanadium 133.46 ppb Barium and compounds 209.0 ppb Copper and compounds 450.0 ppb Manganese and compounds 787.12 ppb Lead 948.21 ppb Zinc 1400.83 ppb Aluminum 12400.0 ppb Iron 39270.0 ppb

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Site ID: SITE 00023

MARE ISLAND NSY

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Aug 2004

Contaminated Areas

Groundwater: Medium Risk

Contaminants: DDT 50.0 ppb Styrene 700.0 ppb Beryllium and compounds 1500.0 ppb Toluene 2000.0 ppb Bis(2-ethylhexyl)phthalate (DEHP) 2000.0 ppb Chloroform 3000.0 ppb Selenium 3400.0 ppb 1,1,1-Trichloroethane 5000.0 ppb Lead 5100.0 ppb Molybdenum 16700.0 ppb Nickel and compounds 18000.0 ppb Copper and compounds 25600.0 ppb Arsenic (cancer) 25900.0 ppb Vanadium 26800.0 ppb Silver and compounds 38600.0 ppb Antimony and compounds 46000.0 ppb Barium and compounds 111000.0 ppb Zinc 235000.0 ppb Manganese and compounds 281000.0 ppb Aluminum 6870000.0 ppb Nitrate 8250000.0 ppb Iron 11300000.0 ppb Nitrite 30500000.0 ppb

Soil: Low Risk

Contaminants: Methylene chloride 0.01 ppb Acetone 0.02 ppb Cadmium and compounds 0.1 ppb Mercury and compounds (inorganic) 0.17 ppb Beryllium and compounds 0.21 ppb Bis(2-ethylhexyl)phthalate (DEHP) 0.31 ppb Antimony and compounds 0.54 ppb Molybdenum 0.89 ppb Arsenic (noncancer) 11.5 ppb Lead 33.8 ppb Copper and compounds 43.0 ppb Vanadium 47.1 ppb Nickel and compounds 47.2 ppb Zinc 85.7 ppb Barium and compounds 228.0 ppb Manganese and compounds 294.0 ppb Aluminum 14900.0 ppb Iron 29100.0 ppb

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Update (Dec. 5, 2017): We have changed the source of the installation cost data after being notified by the Department of Defense that they erroneously reported their own cost figures on the DERP website. We are now displaying the costs the department says are the most accurate available, from the Pentagon’s DERP database that we received in a FOIA request.

Note: The risk level of a site refers to a relative risk assessment made by the DOD to prioritize the cleanup of sites.

Data: All data comes from the Defense Environmental Restoration Program and the U.S. Army Corps of Engineers, and will be released soon at the ProPublica Data Store. Read our methodology »