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I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)3649233 <br /> ,!D— 404 N Wiget Lane Walnut Creek C4 94598 (925)988-9600 FAX(925)988-%73 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1 <br />' Ptoy r Weston, Inc Client project ID SJC-HSA Sampled Dec 9-10, 1998 <br /> 2300 Clayton Rd , Ste 1580 Sample Matnx Water Received Dec 11, 1998 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 23, 1998 <br /> Attention Karla Brasaemle First Sample # 812-0941 <br />' QC Batch Number GC121798 GC121798 GC121798 GC121798 GC121798 GC121798 <br /> 802005A 802005A 802005A 802009A 802009A 802009A <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D I D I D. <br /> pg/L 812-0941 812-0942 812-0943 812-0944 812-0945 812-0946 <br /> MW-4 MW-6 MW-7 MW-3A MW-9 MW-2A <br />' Purgeable <br /> Hydrocarbons 50 N D 52 N D 75 N D 7,200 <br /> Benzene 050 N D N D N D 1 1 N D 610 <br /> Toluene 050 N D N D N D N D N D 71 <br /> Ethyl Benzene 050 N D N D N D N D N D 530 <br /> Total Xylenes 050 N D 1 3 N D N D N D 330 <br /> Chromatogram Pattern -- Unidentified -- Unidentified Gasoline <br /> Hydrocarbons Hydrocarbons <br /> <C9 <C9 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 20 10 1 0 10 10 100 <br /> Date Analyzed 12/17/98 12/17/98 12/17/98 12/17/98 12/17/98 12/17/98 <br /> Instrument Identification HP-5 HP-5 HP-5 HP-9 HP-9 HP-9 <br /> Surrogate Recovery, % 93 92 94 * 97 96 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against afresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> ISEQUOIA ANALYTICAL, #1271 Please Note <br /> * Surrogate recovery above control limit due to coelution <br /> Ilanne Fegley <br /> Project Manager <br /> 8120941 RFW <1> <br /> .tom <br />