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S.01 .00 19 April 1999 AGE -NC Project No. 95-0197 Page 2 of 4 in a west portion of the site and covered with plastic sheeting. Each tank measured 27 feet in length ` and 8 feet in diameter; the entire excavation cavity was measured at approximately 25 feet in width by 35 feet in length. Each UST was buried beneath approximately 4 feet of backfill; the bottom of each UST was at approximately 12 feet below surface grade (bsg). The USTs 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 E. Documentation of receipt of the USTs issued by West Coast Equipment is included with Appendix F. 2.2. SOIL SAMPLE COLLECTION Following tank removal activities, a total of ten soil samples were collected from beneath the former UST locations and stockpiled soil by a representative of PEAL under the direction of the PHS-EHD. Four soil samples were collected beneath the east and west ends of UST No. 1 and UST No. 2 at depths of approximately 14 feet below surface grade (bsg); six soil samples were collected from stockpiled soil located at a west section of the site. Soil samples were collected utilizing brass sleeves loaded inside of a slide -hammer. Analytical results of soil samples are summarized in Table 1; soil sample locations are depicted in Figure 2. On 19 December 1998, three additional soil samples were collected by PEAL beneath former product piping and dispenser locations under the direction of the PHS-EHD. ` Following soil sampling activities, each sample was logged on a chain -of -custody form and transported to PEAL in a chilled container. The following analysis were performed: • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, respectively) 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 (RIPE), ethyl tert-butyl ether (ETBE), tertiary amyl methyl ether (TAME), tertiary -butyl alchohol (TBA) and MTBE in accordance with EPA Method 8260; and • Total lead in accordance with EPA Method 6010. Advanced GeoEnciron mental, Inc.