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(Continuation Sheet) PROJECT EI Dorado Auto 1 REPORT NO. ADDRESS 2070 EI Dorado Street,California 95206 DATE June 28,2016 ADDITIONAL NOTES,OBSERVATIONS,AND/OR FILE REVIEW SUMMARY APN: 167-050-01 In a conversation with Ms. Margaret Quiroga she relayed the following information: Ms. Quiroga's husband purchased the Site in 1968 and did not operate the gasoline USTs. The waste oil UST was utilized by Ms. Quiroga's husband from approximately 1968 to 1982. The waste oil UST may have a remote fill pipe in the station building. Her husband did not use the gasoline USTs for waste oil storage. Ms. Quiroga is interested in pumping the USTs and properly closing them in place. San Joaquin County has relayed the following information regarding the Site: San Joaquin County became aware of the USTs in the mid to late 1990's when oversight for USTs was transfered to the Unified Program Agency. A Notice to Abate was issued to Ms. Quiroga on February 15, 2000. On January 24, 2003 the San Joaquin County Environmental Health Department referred the Site to the District Attorney(DA). On January 3, 2005 The (DA). Filed a complaint against Ms. Quiroga for failing to respond to the February 2000 Notice to Abate. County Environmental Health tentatively approves of closing the USTs in place if approval is obtained from the Stockton Fire Dept. The internal diameter of the UST fillpips are as follows:T-WO-1: approximately 3"; T-W-2, T-M-3, &T-E-4 were each approximately 0.35' (-4.2"). No obstructions were observed in the fillpipes. Depth to bottom of fillports and estimate of content volume: T-WO-1: 5.0 feet to top of sludge,6.17 feet to hard contact with tank bottom.The volume of the UST ontents cannot be accurately estimated due to unknown UST size, a rang is provided: Sludge: —130 to —400-gal; water: —400 to —1,400-gal; oil: —22 to 650-gal. T-W-2: 11.58', at least 8,000-gallons of water, UST is over filled based on tank size used for estimate. T-M-3: 11.34', approximately 6,920-gallons of water. T-E-4: 11.29', approximately 88-gallons of water, and at least 7,900-gallons of waste oil. The UST is overfilled based on tank size used for estimate. San Joaquin County Environmental Health Department Contact Information: Kasey Foley/209-468-3451 /kfoley@sjcehd.com 1868 East Hazelton Avenue Stockton, CA 95205 UNDERGROUND STORAGE TANK SURVEY REPORT Page 5 of 5 SUBMITTED BY Nicholas Howard TITLE Project Geologist Nicholas A.Howardb August 11,2016 SIGNATURE DATE This report has been prepared by Redhorse Corp.as part of the Cooperative Agreement L-99T11601 between U.S. Environmental Protection Agency(USEPA) Region 9 and the California State Water Resources Control Board