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Site Mitigation Program

To Protect human health and the environment, the Site Mitigation Program of Contra Costa County, evaluates and tracks contaminated properties within the County's boundaries. The intent of other County environmental programs is to prevent and or immediately mitigate a discharge of hazardous materials or hazardous waste. The Site Mitigation Program examines the aftermath of a discharge to the environment which can not be mitigated in a timely manner.

Currently the Site Mitigation Program tracks 1500 sites with in the County . These sites may have been contaminated with hazardous materials, hazardous waste, or substances which if discharged impact human health or the environment ( e.g. food grade material discharged in large quantities into a creek resulting in a chemical or biological demand for oxygen that removes it from the aquatic habitat). Each site may be in a different cleanup/no further action status. Some require further evaluation, others are in corrective action/risk assessment status and some may be a superfund site with a deed restrtiction. Contaminated sites range in size and complexity from gas stations to a large industrial facility.

Regulatory jurisdiction over contaminated sites is shared among four agencies at the federal, state and local level. The United States Environmental Protection agency, the California Departement of toxic Substance Control, the California State Water Resource Control Board and Contra Costa Health Services.

Contact or 925-335-3200