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FORMERLY USED DEFENSE SITE INSTALLATION ID: CA99799F591400

LAKE CHABOT MACHINE GUN RANGE

castro valley, California

Cost So Far

$2.79M

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

Expected Additional Cost

$145K

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

Completion Date

2018

The date the DOD says cleanup of all sites was completed. Long term monitoring may continue after this date.

The 1,014.34-acre site is located in Alameda County, California, approximately 20 miles southeast of the town of Alameda. The site is currently used as a watershed for the East Bay Municipal Utilities District (EBMUD) and has been since the... see more » The 1,014.34-acre site is located in Alameda County, California, approximately 20 miles southeast of the town of Alameda. The site is currently used as a watershed for the East Bay Municipal Utilities District (EBMUD) and has been since the departure of the Department of Defense. (Source: U.S. Army Corps of Engineers) « see less

3 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.

1 Active Site

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: 03HTRW

HAZARDOUS, TOXIC AND RADIOACTIVE WASTE

Unknown Site Type

Cost

$293K

Cost in 2015 plus expected future cost of cleanup

Final Cleanup Action

Sep 2018

Contaminated Areas

Soil: High Risk

Data from 2012 SSI indicates PAHs from skeet range activites are present in the surface and subsurface soil. Pathways include human inhalation, ingestion, and dermal. Lead present as well but human screening level risk assessment determined no risk to h Receptors include workers (Christmas Tree Farm and EBMUD), hikers and visitors to the Christmas Tree Farm.

Contaminants: 2-Methylnaphthalene 0.27 mg/kg Fluorene 0.58 mg/kg Naphthalene 1.2 mg/kg Acenaphthene 1.7 mg/kg Anthracene 3.1 mg/kg Dibenz[ah]anthracene 10.0 mg/kg Indeno[1,2,3-cd]pyrene 28.0 mg/kg Benz[a]anthracene 41.0 mg/kg Chrysene 49.0 mg/kg Pyrene 52.0 mg/kg Fluoranthene 60.0 mg/kg Benzo[b]fluoranthene 89.0 mg/kg Benzo[a]pyrene 180.0 mg/kg Lead 2750.0 mg/kg

See more details...

2 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: 02OEW

MACHINE GUN RANGE

Firing Range

Cost

Unknown

Final Cleanup Action

Mar 2009

Site ID: 01CON/HTRW

UNDERGROUND STORAGE TANKS

Underground Storage Tanks

Cost

Unknown

Final Cleanup Action

Jul 2008

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 »