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Wright Environmental January 7, 1994 Services, Inc. The City of Tracy 520 Tracy Blvd. Tracy, CA 95376 Attn: Mr. Paul Verma Re: Tracy Auto Stereo, 10 W. Grant Line Rd., 'frac\, CA Tank Removal Report WES Project 10-10-T Dear Mr. Verma, Wright Environmental Services, Inc. (Wright) is pleased to provide you with this summary report of activities associated with the recent excavation and removal of five underground storage tanks (LIST) from the above referenced site. The Tank sizes and last known contents were: "tank 1, 90 gallon gasoline, Tank 2, 300 gallon gasoline, Tank 3, 280 gallon gasoline, Tanks 4 & i were 18 gallon gasoline tanks. Tanks 4 & 5 were not recorded on the permit application form as they were found to be part of the associated piping for Tanks 2 and 3. Drawing 1 identifies the former location of the tanks and references a cross street. Permits Wright submitted underground storage tank closure permit application forms provided by San Joaquin County, Public Health Services-Environmental Health Division (PHS-EHD) prior to beginning excavation work. The closure permit application review process was expedited by NIr. Bill Snavcl\ of YFIS l(1ID,. permits were approved on October 22, 1993. A cop\ of the approved permit is enclosed in Appendix A. The city of Tracy waived exc_teation permit requirements. Tank Removal, Disposal and Excavation Residual liquids were found i❑ some of the tanks. "tank 1 contained water with a petroleum sheen. Tank 2 was empty. 'Tank 3 contained gasoline and water. Tanks 4 and 5 contained gasoline. All tanks were pump-,d free of residual liquids and rinsed with water. The residual liquid and the rinsate were recycled by Petroleum Recycling Corp. of Patterson, Ca., as non-RCRA, Hazardous Waste. A copy of the October 21, 1993 Hazardous Waste Manifest is enclosed in Appendix 13. The tanks were excavated on October 22, 1993, soil was stockpiled on site between plastic. Obvious signs of petroleum hydrocarbons were observed in the soil surrounding each tank. There were mild gasoline odors from the soil around the fill pipe ends of each tank. Tank 2, was found to have several holes (<1/4 inch) in the bottom and sides. After excavation work was complete a scaled drawing was made of the site. Drawing 1 identifies the specific location of the tanks (as they were found) and other pertinent site information. 'file site waS then secured with 6 ft. chain-link fencing around the excavation perimeter. Prior to the removal of the tanks, they were purged with Carbon Dioxide (dry ice) at a rate of 15 pounds per 500 gallons of volume. The tanks wer: removed from the site on October 23, 1993 and transported to Triangle of Sacramento for proper recycling/disposal as documented by the underground storage tank disposition tracking record enclosed in Appendix C. 1961 Hill View Way • Tracy, California 95376 Telephone(209)833-0758 • Fax(209) 832-5152