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KEI-P89-1104 .R9 December 17 , 1992 Page 2 storage tank, one 10 , 000 gallon regular unleaded gasoline storage tank, and one 280 gallon waste oil tank. The tanks were made of steel and no apparent holes or cracks were observed in any of the tanks. Ms. Kasey Foley of San Joaquin County Public Health Services (SJCPHS) Department and Mr. Ron Hiltscher of the City of Stockton Fire Department were present during tank removal . Ms. Foley was also present during subsequent soil sampling. Four soil samples, labeled Al, A2 , B1 , and B2 , were collected from beneath the fuel tanks at depths of 15 . 5 to 16 . 5 feet below grade. One soil sample, labeled W01, was collected from the soil beneath the waste oil tank at a depth of 9 . 5 feet below grade. Sample locations are as shown on the attached Figure 2 . KEI returned to the site on November 20 , 1989 , in order to collect soil samples from the product pipe trenches . Four samples, labeled P1 through P4 , were collected from the product pipe trenches . Two samples, labeled VP1 and VP2 , were collected from the vapor pipe trenches, and one sample, labeled WP1 , was collected from the waste oil remote-fill pipe trench. All seven soil samples were collected 11 at depths ranging from 2 . 5 to 3 . 5 feet below grade. Pipe trench r sample point locations are as shown on the attached Figure 4 In an attempt to remove as much of the contaminated soil as possible in the vicinity of the fuel tank pit, KEI returned to the site on December 5, 1989 , to observe additional soil excavation in the area of sample points A2 and B2 , as described in KEIIIs work plan (KEI-P89-1104 .P1) dated November 22 , 1989 . Soil was excavated from the southerly half of the fuel tank pit to a depth of 26 5 feet below grade. Two soil samples, labeled A2 ( 25 . 5) and B2 (26 . 5) , were collected from the fuel tank pit (one of the additional samples was collected below sample point location A2 at a depth of 25 . 5 feet below grade, and the other additional sample was collected below sample point location B2 at a depth of 26 . 5 feet below grade, respectively) . Four soil samples, labeled SW1 ( 13) , SWl (19) , SW2 (20/13) , and SW2 (20/19) , were also collected from the fuel tank pit sidewalls at depths of 13 and 19 feet below grade. Sample point locations are shown on the attached Figure 3 . Mr. Harlin Knoll of the SJCPHS was present during sampling KEI again returned to the site on December 7 , 1989 , in order to complete sampling of the southerly half of the fuel tank pit . Two soil samples, labeled SW3 (20/13) and SW3 (20/ 19) , were collected from the tank pit sidewalls at depths of 13 and 19 feet below grade, respectively. In addition, one soil sample, labeled NSW, was collected from the northerly sidewall of the new fuel tank pit at a depth of 13 . 5 feet below grade. Sample point locations are as shown on the attached Figure 3 . On December 13 , 1989 , KEI