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r ( a <br /> Mr. Bank Sheetz <br /> June 24, 1987 <br /> Page 2 <br /> Benzene a.-:_ toluene levels exceeded DHS designated action levels in <br /> both samples.,, and xylerie exceeded its action level in sample P-N0. <br /> On March 26, 1987, BC and American Environmental ManageiL:ent <br /> Corporation (AEMC) personnel pumped approximately 380 gallons of <br /> ater containing di;solveO hydrocarbons from the two shallow <br /> excavatio., pits while Becker personnel conducted a test of the vent <br /> ` line. On April 6, 1987, BC and AEMC personnel pumped an additional <br /> approximately 220 gallons to give Becker personnel access to the" <br /> vapor lines. All water was containerized in drums and transported <br /> by AEMC to H and H Ship Service ,.in Sari Francisco. <br /> Becker personnel discovered a leak in the manifold in the vapor line <br /> connecting the two regular leaded tanks. Becker replaced the vapor � <br /> line piping on April 11, 1.987, and the regular leaded tank system <br /> passed a pressure test on April 13, 1987. <br /> In addition to replacing the regular leaded tank vapor line piping, <br /> Becker replaced all valves in the piping of the regular leaded, <br /> regular unleaded, and super unleaded tank systems. To provide <br /> access to the piping, Becker, in late' Acri excavated around these <br /> tank systems to approximately 3 feet. The excavated material was <br /> stockpiled on asphalt along the east side of the station, On <br /> April 28, . 1987, BC personnel collected five soil samples by hand <br /> angering approximately 1 foot into the spoil pile of excavated <br /> material. Soil samples were coll*cted at the locations shown on <br /> Figure 1. Three soil samples ware selected and sent to the SC <br /> Emeryville laboratory foz analysis for BTX, total fuel hydrocarbons, <br /> and total lead. The results of these analy are summarized <br /> Table 2. Complete results are enclosed. 7,AU <br /> Table 2. Analytical Results. Soil Samples <br /> Constituent Action lebela AST-1 AST--4 AST-5 <br /> Benzene 0.7 <0.01 <0.01 - <0.01 <br /> Toluene 100 <0.01 0.11 <0.01 <br /> Xylene 62g <0.01 0.15 <0.01 <br /> Total fuel hydrocarbons -- 360 64 410 <br /> Total lead 500 1014 12 <br /> —Note: All measurements shown are in milligrams per kilogram (mc?/kg) : <br /> ..j <br /> aDesignated action lsvel in a solid for the protection of ground- <br /> water quality recommended by the California Regional Water r_ualiry .-,, <br /> control 'Board, _Central Valley;Region, September 1986. <br /> bNo standard is established for total fuel hydrocarbons. <br /> BROWN AND CALDWELL <br /> 723SS7REET SACRAMENIO.CAghB14•19161444.0123 - - <br />