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(rl <br /> Chevron Products Company 4 <br /> ft1 hevron Service Station#9-203 SOS West Charter Wa S kton California <br /> laniiary 18 2001 <br /> • Soil Sampling and Analysis. Selected soil samples collected from soil boring <br /> SB-2 were analyzed for total petroleum hydrocarbons as gasoline (TPHg), <br /> aromatic hydrocarbons (i e BTEX) and fuel oxygenates Results are <br /> summarized in Table 1 <br /> Analytical results reported no detected benzene, toluene, xylenes or fuel <br /> oxygenates in soil samples submitted TPHg and ethylbenzene concentrations <br /> of 130 mg/kg and 0 026 mg/kg were reported in the soil sample SB-2 at 27-feet <br /> bgs <br /> • Groundwater Sampling and Results. Discrete interval samples were obtained <br /> from various depths within each of the borings Procedures for groundwater <br /> collection are outlined in Attachment B, Field and Laboratory Procedures <br /> Collected samples were analyzed for TPHg, BTEX compounds, and fuel <br /> oxygenates Results are summarized in Table 2 <br /> S13-2 Groundwater analytical results for water samples collected from S13-2 <br /> suggest increasing concentrations of TPHg from 790 µg/L at 46 5 feet bgs to <br /> 3,100 µg/L at 54 feet bgs Results for groundwater at 82 feet suggest no TPHg <br /> was present Similar trends were noted for BTEX and TBA <br />. SB-3/CPT-01 Groundwater analytical results for water samples collected from <br /> SB-2 suggest a decrease of TPHg, BTEX and fuel oxygenate concentrations <br /> throughout the profile Concentrations of MtBE were typical of this trend <br /> 46,000 µg/L at 35-feet bgs, 160 µg/L at 62 5-feet bgs and 6 0 µg/L at 86 5-feet <br /> bgs <br /> SB-4/CPT-02 Groundwater analytical results for water samples collected from <br /> SB-4/CPT-02 suggest an increase of TPHg from 840 µg/L at 44-feet bgs to <br /> 1,200 µg/L at 54-feet bgs Benzene concentrations at these same depths <br /> increased from 22 µg/l,to 84 µg/L Ethylbenzene and xylene concentrations <br /> were approximately equal at these depths and MtBE and TBA decreased with <br /> depth No analytes were detected in the 83-foot sample from SB-4 <br /> • Stockpiled Soil. Less than 1 cubic yard of soil was generated while drilling SB- <br /> 2, which was placed onsite in a 50-gallon drum One 4-part composite sample <br /> was collected from the soil and analyzed for TPHg, BTEX, and lead Integrated <br /> Waste Management of Milpitas, California contracted to remove the stockpiled <br /> soil from the site Stockpiled soil analytical data is presented in Table 3 <br /> 077 41991 0181 IChevron\92033\REPORTS\92033_PhaselISA_RevA doc <br />