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19 April 1999 AGE-NC Project No. 98-0472 Page 2 of 4 site (See Figure 2). Soil removed during excavation activities was stockpiled in a south portion of the site and covered with plastic sheeting. Each tank measured 27 feet in length and 8 feet in diameter, the entire UST excavation cavity was measured at approximately 22 feet in width by 35 feet in length. Each UST was buried beneath approximately 5 feet of backfill; the bottom of each UST was at approximately 13 feet below surface grade. Each UST had been emptied of all fuel prior to excavation activities. Prior to UST removal activities,the tanks were inspected by representatives of the PHS-EHD and the City of Stockton Fire Prevention and were approved for removal; the USTs were hoisted out of each tank cavity utilizing a conventional truck mounted crane. The tanks were hauled off-site as a non-hazardous material to West Coast Equipment, a tank recycling facility in Turlock, California. Photographs of each tank during removal activities are included with Appendix D. Documentation of receipt of the USTs issued by West Coast Equipment is included with Appendix E. 2.2. SOIL SAMPLE COLLECTION Following tank removal activities, a total of seven soil samples were collected from beneath the former UST locations and stockpiled soil by a representative of AAL under the direction of the PHS- EHD.Four soil samples were collected beneath the north and south ends of UST No. 1 and UST No. 2 at depths of approximately 16 feet below surface grade (bsg); three soil samples were collected from stockpiled soil located in a south portion of the site. Soil samples were collected utilizing brass sleeves and preserved with teflon tape and plastic end caps. Analytical results of soil samples are summarized in Table 1; soil sample locations are depicted in Figure 2. On 31 December 1998,eight additional soil samples were collected beneath former product piping and dispenser locations by a representative of PEAL under the direction of the PHS-EHD. Soil samples were collected utilizing brass sleeves loaded inside of a slide-hammer and preserved with teflon tape and plastic end caps. Following soil sampling activities, each sample was logged on a chain-of-custody form and transported to either AAL or PEAL in a chilled container. The following analysis were performed: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Methods 8015M/5030; • Volatile aromatics(benzene, toluene, ethylbenzene and xylenes: BTEX) with methyl tert- butyl ether(MTBE) in accordance with EPA Method 8020; • Fuel oxygenates including di-isopropyl ether(DIPE),ethyl tert-butyl ether(ETBE),tertiary amyl methyl ether(TAME),tertiary-butyl alchohol (TBA) and MTBE in accordance with Advanced GeoEnvironmental,Inc.