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0 Quik Stop Station No. 14 May 10, 2001 <br />Stockton California Results of Product Line and Dispenser Soil Sampling <br />Soil samples collected from the hand -auger borings were submitted, under chain -of -custody <br />documentation, to Kiff Analytical LLC (Kiff), a California Department of Health Services - <br />certified analytical laboratory (ELAP No. 2236) located in Davis, California. Soil samples <br />D 1, D2, PL 1 and PL2 were analyzed for total petroleum hydrocarbons as gasoline (TPHg), the <br />volatile aromatic compounds benzene, toluene, ethylbenzene and total xylenes (BTEX), and <br />the seven fuel oxygenates methyl-tert-butyl ether (MTBE), diisopropyl ether (DIPE), ethyl <br />tert-butyl ether (ETBE), tert-amyl methyl ether (TAME), tert-butanol (TBA), methanol and <br />ethanol by Environmental Protection Agency (EPA) Method 8260B. No analyses were <br />performed on the soil stockpile samples. <br />Soil Analytical Results <br />Soils encountered below the bottom of the dispenser and product line trenches consisted of <br />very dark gray, plastic, sandy clay to approximately 4 feet bsg and yellowish brown, dense, <br />fine-grained, silty sand to total depth of the borings (5 feet bsg). No groundwater was <br />encountered in the hand auger borings. <br />The soil samples were analyzed by Kiff on 25 and 27 April 2001. Soil analytical results are <br />summarized in Table 1. Copies of the analytical reports and chain -of -custody documents are <br />contained in Attachment B. <br />Concentrations of 1400 and 440 milligrams per kilogram (parts per million or ppm) TPHg <br />were reported in the soil samples (D 1 and D2) collected under the dispensers. Concentrations <br />of toluene, ethylbenzene and xylenes ranging from 0.97 to 140 ppm were also reported in soil <br />samples D 1 and D2. No BTEX compounds were reported in soil samples PL 1 and PL2. <br />Concentrations of 1.6, 0.014 and 0.021 ppm MTBE were reported in soil samples D1, PL 1 <br />and PL2, respectively. No other fuel oxygenates were reported in the soil samples. <br />Distribution <br />A copy of this report should be forwarded to: <br />Mr. Michael Kith, R.E.H.S. <br />San Joaquin County Environmental Health Division <br />304 East Weber Avenue, 3`d Floor <br />Stockton, California 95202 <br />144SoiISmp1gRpt5-01 <br />Project No. 7144.11 2 HORIZON ENVIRONMENTAL INC. <br />