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Sequoia 680 Chesapeake Drive Redwood CityCA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SWne Tech Services Client Project ID Chevron #9-9840, Stockton Sampled Jun 11, 1999 <br /> 1680 Rogers Avenue Sample Matrix Water Received Jun 11, 1999 <br /> San Jose, CA 95112 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 28, 1999 <br /> Attention Christine Lillie First Sample# 906-1129 <br /> QC Batch Number GC061899 GC061799 GCO61799 GCO61799 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS withaBTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I 1.1) I D <br /> Mg/L 906-1129 906-1130 906-1131 906-1132 <br /> MW-1 MW-2 MW-3 TB <br /> Purgeable <br /> Hydrocarbons 50 700 240 N D N D <br /> Benzene 050 N D 4 6 N D N D <br /> Toluene 0 50 N D 0 61 N D N D <br /> Ethyl Benzene 050 N D 0 65 N D N D <br /> STotal Xylenes 0 50 N D N D N D N D <br /> MTBE 25 400 110 N D N D <br /> Chromatogram Pattern Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 5 0 1 0 1 0 1 0 <br /> Date Analyzed 6/18/99 6/17/99 6/17/99 6/17/99 <br /> I <br /> Instrument Identification HP-2 HP-2 HR-2 HP-2 <br /> Surrogate Recovery, % 94 104 93 93 <br /> (QC Limits = 70-130%) <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, #1,271 <br /> 41el/isjsa A Brewer <br /> Project Manager <br /> I <br /> 9061129 BTS <1> <br />