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IC C ® R • 7-Eleven Store Number 19976 Fuel System Upgrade Report August 7, 2003 Page 4 i detergent solution and rinsed with tap water followed by a distilled water rinse to reduce the possibility of cross-contamination between sample locations Copies of the field notes are included in Attachment A and the soil sample locations are shown on Figure 1 The soil samples were analyzed for TPHg, benzene, toluene, ethylbenzene, and total xylenes (BTEX), MtBE, dllsopropyl ether (DIPS), tert-amyl-methyl ether (TAME), ethyl-tert-butyl ether (EtBE), and tert-butyl alcohol (TBA) using EPA Method 8260B Selected soil samples were also analyzed for total lead using EPA Method 6010B UNDERGROUND STORAGE TANK REPLACEMENT On June 9, 2003, three 10,000-gallon double-walled fiberglass USTs were removed from the excavation and hauled offsite Ms Kasey Foley, Hazardous Material Inspector with the SJCEHD, observed the UST removal, and collection of the soil samples underlying the USTs Before UST removal, Glacier Environmental thoroughly rinsed and evacuated the three USTs to remove petroleum residue remaining in the tanks, then exposed and inerted the USTs with dry ice Approximately 1,350 gallons of rinsate water, generated during the tank cleaning operation, was transported under Uniform Hazardous Waste Manifest as Non-RCRA Hazardous Waste Liquid to Crosby and Overton in Long Beach, CA for proper disposal (Attachment B) After confirmation by the SJCEHD that the three USTs were properly inerted, Glacier removed the USTs from the excavation for inspection The two western USTs appeared to be in good condition, with no apparent holes or cracks observed The eastern UST had a notable rip of the outer shell at the southwestern end of the tank According to Glacier and SJCEHD, the damage occurred during UST removal On June 9, 2003, MP Environmental hauled the USTs to Golden State Metals In Bakersfield, CA, for recycling Copies of the SJCEHD UST disposition tracking record for each UST removed are provided In Attachment B On June 9 and 19, 2003, a total of six UST confirmation soil samples (designated T1 N-15' through T3S-13') were collected in native soil underlying the ends of the three USTs (Figure 2) The samples were collected at an approximate depth of 12 to 15 feet bgs An excavator was used to retrieve the native soil from the tank pit floor, then clean 2-inch-diameter brass sample liners were driven into the native soil held in the excavator bucket Minor discoloration was observed In soil in the sidewall and e£W excavation floor of the northeast end of the excavation Slight gasoline odors were noted during collection of tank pit soil samples Between June 23 and July 7, 2003, Glacier installed two new double-walled fiberglass USTs one 10,000-gallon premium unleaded gasoline UST, and one 15,000-gallon regular unleaded gasoline UST, and associated piping and dispensers (Figure 2) In order to accommodate the new 15,000- gallon UST, Glacier excavated approximately 288 cubic yards of soil, expanding the UST pit to the west The soil was stockpiled in a staging area at Forward Landfall pending laboratory analytical results Following installation of the new USTs, product lines, and dispensers, the excavated areas were paved with concrete 19976 Fuel Line&USTs Upgrade Repord doc SECOR International Incorporated