SITE INFORMATION AND CORRESPONDENCE

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Excavation of the soils from beneath the previous location of Tank T2 was completed on December 23 , 1987 . Upon removal of the additional soils, two (2) excavation bottom soil samples- and three stockpile soil samples were collected by Precision Industries. These sampling activities were observed by personnel from the San Joaquin Local Health Department. During the sample collection effort, the inspector made a note that odors were emitted by the southern most excavation bottom -soil sample (coded 1 South) . Note was also made that the stockpiled excavated soils were -emitting odors. . All of the soil samples were analyzed by Trace Analytical 'Laboratory. Both excavation bottom soil samples contained no detectable amounts of either TPH or BTX&E compounds. The stockpiled soilsamples, however, contained significant levels of TPH, ranging from 150 mg/Kg to 1, 200 mg/Kg. Upon receipt of the analytical results, Laura Scudders requested permission h to backfill the tank removal area. Verbal permission was .granted by the San Joaquin Local Health Department. In early 1988, the tank area was backfilled and covered with an asphalt surface. The .backfill soil source. was not t documented. The stockpiled soils (approximately 100 cubic yards) were moved to the southwest corner of the facility and secured with plastic. Tank T3 was a 12 , 000 gallon diesel storage tank located directly adjacent to the west side of Tank T2 . This tank had been integrity tested in 1987 and had tested tight. The decision to remove this tank was based on an effort to reduce Laura Scudders environtental. liabilities for the forthcoming sale of the property. The tank and associated piping were removed between May 17, 1989 and May 30, 1989 . ' A total of 16 soil samples were collected by WESTON during this tank/pipeline removal effort. Three tank bottom soil samples and 13 pipeline soil samples were collected. These samples were analyzed by ROY F. WESTON's analytical Laboratory in Stockton, California. Each of the 16 soil, samples collected were containerized with two, 2" diameter brass tubes. The tank bottom soil samples were collected from native soils within a backhoe .scoop and transferred to the brass tubes. All pipeline samples were collected from inplace native soils by driving the tube into them. The initial sample tube was designated with an "A" following the sample identification while the second tube was designated with a "B. " . All "A: tubes were analyzed for BTX&E and all "B" tubes were analyzed for TPH. Analysis for the TPH in these soil samples indicated only trace concentrations were present in: two samples. For one tank bottom sample, MT- B, 17 -mg/Kg of TPH was detected. For pipeline sample P127B, 24 mg/Kg of TPH was detected. For the BTX&E compounds, eight pipeline soil samples. exhibited detectable levels of toluene. The concentrations detected ranged from 0. 036 mg/Kg to 0. 32 mg/Kg. 2 I� k