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Sequoia <br />680 Chesapeake Drive <br />Redwood City CA 94063 (650) 364-9600 <br />FAX(650)364-9233 <br />8/25/98 <br />404 N Wiget lane <br />Walnut Creek, CA 94598 (925) 988-9600 <br />FAX (925) 988-9673 <br />Analytical <br />819 Striker Avenue Suite <br />8 Sacramento CA 95834 (916) 921-9600 <br />FAX (916) 921-0100 <br />(QC Limits = 40-140%) <br />1455 McDowell Blvd North Ste D Petaluma, CA 94954 (707) 792-1865 <br />FAX (707) 792 0342 <br />Aftnler-Ryan - Dublin <br />Client Project ID <br />Chevron #9-5775, Lodi Sampled <br />Aug 24, 1998 <br />47 Sierra Court, Suite J <br />Sample Matrix <br />Sod Received <br />Aug 24, 1998 <br />Dublin, CA 94568 <br />Analysis Method <br />EPA 5030/8015 Mod /8020 Reported <br />Aug 26, 1998 <br />Attention Greg A Gurss <br />First Sample # <br />808-2203 <br />TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br />Reporting <br />Sample <br />Sample Sample Sample <br />Analyte Limit <br />I D <br />I D I D I D <br />mg/kg <br />808-2203 <br />808-2204 808-2205 808-2206 <br />SP7 <br />SP8 SP9 SP10 <br />Purgeable <br />Hydrocarbons 1 0 <br />29 <br />1 7 N D 59 <br />Benzene 00050 <br />N D <br />N D N D N D <br />Toluene 00050 <br />N D <br />N D N D 00092 <br />Ethyl Benzene 00050 <br />N D <br />N D N D N D <br />Total Xylenes 00050 <br />0 011 <br />N D N D 0 068 <br />Chromatogram Pattern <br />Gasoline & <br />Gasoline & Gasoline & <br />Unidentified <br />Unidentified Unidentified <br />Hydrocarbons <br />Hydrocarbons Hydrocarbons <br />C6 -C12 <br />>C8 C6 -C12 <br />uuaiity L.;ontroi uata <br />Report Limit Multiplication Factor <br />10 <br />1 0 10 1 0 <br />Date Analyzed <br />i <br />8/25/98 <br />8/25/98 8/25/98 8/25/98 <br />Instrument Identification <br />HP -5 <br />HP -5 HP -4 HP -4 <br />Surrogate Recovery, % <br />61 <br />67 96 <br />(QC Limits = 40-140%) <br />Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br />Analytes reported as N D were not detected above the stated reporting limit <br />SEQUOIA ANALYTICAL, #1271 <br />0'i'a' <br />nne Fegley <br />Project Manager <br />Please Note <br />* Surrogate recovery above detection limit due to coelusion <br />8082197 GET <2> <br />