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l [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ Table 1 Summary of Soil Chemistry Results 950 Industrial Drive,Stockton,California (Concentrations in milligrams per kilogram) Sample Sample Acetone 2-Butanone 4-Methyl-2- Toluene Ethylbenzene Styrene Xylenes Dimethyl- Benzaldehyde Date pentanone methyloxime- cyclohexene Pipe(N) 09/07/95 ND ND ND ND ND ND ND ND ND @ 5' Pipe(E) 09/07/95 ND ND ND ND ND ND ND ND ND @ 4.75' i - Pipe(S) 09/07/95 ND ND ND ND ND ND ND ND ND @ 5' Pipe(W) 09/07/95 ND ND ND ND ND ND ND ND ND @ 4.5' Pipe(B) 09/07/95 ND ND ND ND ND ND ND ND ND @ 8'7-)j PRG 2,000 8,700 none listed 1,900 2,900 2,200 980 none listed 6,500 (residential) PRG 8,400 34,000 none listed 2,700 3,100 2,200 980 none listed 68,000 (industrial) Notes: NR = Not reported ( + NA = Not analyzed ND = Not detected above the laboratory's minimum detection limit * = Because the north end of the former tank pit had subsided approximately 2 feet,the starting elevation of boring SB-1 was approximately 2 feet below general grade. Therefore,sample SB-1.15 was collected at a depth of 17 feet. PRG = Preliminary Remediation Goal, U.S. Environmental Protection Agency, Region IX, February 1, 1995. Soil samples obtained from excavations on July 19 and December 20, 1989 were collected by SEMCO. Soil samples obtained from soil borings SB-1 through SB-4 were collected by Augeas Corporation. Soil samples obtained from soil borings CE-1 through CE-4 were collected by Cypress Environmental. Soil samples obtained from the September 1995 excavation of the former pipeline area were collected by Cypress Environmental. All soil samples were analyzed by USEPA Method 8240. Except for the chemical constituents listed on this table as having been detected and 0.017 milligrams per kilogram benzene reported in the sample collected at 4 feet from boring CE-3,all other analyzed constituents were non-detect.