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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> IO <br /> MPDS Services Client Project ID Unocal#0187 437 E Miner Ave Stockton Sampled Aug 6, 1996 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Aug 6, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Aug 23, 1996 <br /> Attention Jarrel Crider First Sample # 608-0640 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Chromatogram DL Mult Date Instrument Surrogate <br /> Number Description Pattern Factor Analyzed ID Recovery, % <br /> QC Limits <br /> 70-130 <br /> 608-0640 U-1 Gasoline 50 8/20/96 HP-4 97 <br /> 608-0641 U-2 Gasoline 10 8/20/96 HP-4 100 <br /> 608-0642 U-3 Gasoline 200 8/20/96 HP-4 99 <br /> 608-0643 U-4 Gasoline 10 8/20/96 HP-4 90 <br /> 608-0644 U-5 -- 10 8/20/96 HP-4 93 <br /> 608-0645 U-6 -- 10 8/20/96 HP-4 94 <br /> 608-0646 U-7 Gasoline 10 8/20/96 HP-4 95 <br /> 608-0647 U-8 -- 10 8/20/96 HP-4 94 <br /> 608-0649 ES-1 -- 10 8/20/96 HP-4 97 <br /> 608-0650 ES-2 -- 10 8/20/96 HP-4 97 <br /> 608-0651 ES-3 -- 10 8/20/96 HP-4 96 <br /> SEQUOIA ANALYTICAL, #1271 <br /> Oignature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 6080640 MPD <2> <br />