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' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)98&9600 FAX(9Z5)988-9673 <br /> 819 Striker 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 /> qtettler-Ryan- Dublin Client P 'ect 1D Unocal SS#5886, Stockton Sampled Jun 1-2, 1999 <br /> 1 p <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jun 2, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 17, 1999 <br /> Attention Deanna Harding First Sample# 906-0552 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID I.D ID ID ID <br /> Mg/L 906-0552 906-0553 906-0554 906-0555 906-0556 906-0557 <br /> MW-8S MW-81 MW-8D MW-9S MW-91 MW-9D <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 050 ND ND ND ND ND ND <br /> Toluene 050 N D N D N D N D N D N D <br /> Ethyl Benzene 050 N D N D N D N D N D N D <br /> *Total Xylenes 0 50 N D N D N D N D N D N D <br /> MTBE 25 ND ND 12 ND ND ND <br /> Chromatogram Pattern _ - __ -- <br /> Quality <br /> _Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 1 0 1 0 10 <br /> Date Analyzed 6/9/99 6/9/99 6/9/99 6/9/99 6/9/99 6/9/99 <br /> Instrument Identification HP-2 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 92 94 93 93 95 90 <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 /> EQUOIA ANALYTICAL, #1271 Please Note <br /> * Report revised 7/2/99 <br /> a� <br /> Julianne Fegley <br /> Project Manager <br /> 9060540 G ET <3> <br />