Cleanup Sites

  • Site Cleanup Project Documents: DTSC posts on its website key documents related to cleanup sites. If you can't find the project that you're looking for, check the hazardous waste management project documents list, or call our Regulatory Assistance Officers at 800-728-6942.

  • Brownfields and Environmental Restoration Program (Cleanup Program) EnviroStor Database: The EnviroStor database is an online search and Geographic Information System tool for identifying sites with known or potential contamination, and sites where DTSC's environmental oversight or review has been requested or required. Searches can be conducted by site name, address, city, and county, or EnviroStor ID number. The EnviroStor database can also be downloaded. All public inquiries regarding the EnviroStor database should be directed to the Cleanup Program (EnviroStor) help desk at (916) 323-3400 or

  • The Hazardous Waste and Substances Site List (also known as the "Cortese List") is a planning document used by the State, local agencies, and developers to comply with California Environmental Quality Act requirements in providing information about the location of hazardous materials releases. Government Code section 65962.5 requires the California Environmental Protection Agency to develop at least annually an updated Cortese List. DTSC is responsible for preparing a portion of the information that comprises the Cortese List, and other State and local government agencies are required to provide additional hazardous material release information that is part of the complete List. You can develop the DTSC portion of the Cortese List based on the DTSC Site Mitigation and Brownfields Reuse Program information, at the link above.

  • Guidance Manuals for Investigations: DTSC has established guidance documents and recommended procedures for use by its staff, local governmental agencies, responsible parties and their contractors. These documents have been prepared to provide guidelines for the investigation, monitoring and remediation of groundwater at hazardous substance release sites.