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7.0 GOVERNMENT AGENCY RESEARCH 7.1 EPA Databases The California Environmental Protection Agency (EPA) manages contaminated sites through two sub-agencies: the State Water Resources Control Board (SWRCB) and the Department of Toxic Substances Control (DTSC). The SWRCB's GeoTracker database includes underground storage tank (UST) sites, leaking underground storage tank (LUST) sites, cleanup program sites, and land disposal sites. The database can be searched by reviewing two lists, the Permitted Underground Storage Tank (UST) Sites list and the Cleanup Sites list. DTSC's EnviroStor database includes Federal Superfund sites, State response sites, voluntary cleanup sites, school cleanup sites, corrective action sites, and permitted hazardous waste facilities. Live Oak searched both databases on April 11, 2018 for any listed sites within one-quarter mile of the Site. The subject Site was not listed on either database. The following facilities were identified within one-quarter mile: • 26200 Nowell, Universal Forest Products/Tri Valley Growers, approximately 800 feet east of the Site. According to EnviroStor, Universal Forest Products purchased this facility in 2002 from Tri Valley Growers. In 2003, some debris was burned in a pond on the facility. The San Joaquin County Environmental Health Department collected soil samples and found elevated levels of copper and lead. Approximately 290 cubic yards of impacted soil and ash were removed and disposed at a Class 1 landfill. The remaining soil was found to contain heavy metals at or below background levels; a "no further action" letter for this case was issued by the California Department of Toxic Substances Control in 2005. According to GeoTracker, a previously unknown underground storage tank (UST) was discovered at this facility in 2004; slight soil contamination was noted. Ground water and soil vapor screenings were conducted, and no contamination was noted. The facility was issued a "no further action" letter for this case in 2009. A second case is on file with Geotracker for this facility. In this case, leaking USTs were discovered in 1987; contamination affected the drinking water aquifer, and extensive remediation was conducted. The case has a status of closed as of 2001. • 26500 Nowell, Mike Lopez, approximately 1,000 feet northeast of the Site. According to information available from GeoTracker, this facility is a house with a 500 gallon underground storage tank. When the tank was removed in 1989, soil and ground-water contamination were identified. In its 1998 Request for No Further Action report, ENSR argues that the facility should be designated a "low risk" ground-water site, requiring no further action. Plates included with the report depict the contaminated soil and ground water both confined to the boundaries of this facility. The case has a status of closed as of 2000. LOGE 1822 5