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5 y <br /> Sequoia4D 4 680 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 /> 4 <br /> *PDS Services Client Project ID Unocal#0187,437 E Miner Ave,Stockton Sampled May 7, 1996 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received May 7, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported May 22, 1996 <br /> Attention Jarrel Crider First Sample # 605-0647 <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 /> 605-0647 U1 Gasoline 40 5/14/96 HP-9 73 <br /> 605-0648 U2 Gasoline 10 5/14/96 HP-9 90 <br /> 605-0649 U3 Gasoline 100 5/14/96 HP-9 88 <br /> 605-0650 U4 Gasoline 10 5/14/96 HP-9 94 <br /> 605-0651 U5 -- 10 5/14/96 HP-9 90 <br /> 605-0652 U6 -- 10 5/14/96 HP-9 97 <br /> 605-0653 U7 Gasoline 20 5/14/96 HP-9 82 <br /> 605-0654 U8 Gasoline 10 5/14/96 HP-9 95 <br /> 605-0655 ES1 -- 10 5/14/96 HP-9 97 <br /> 605-0656 ES2 -- 10 5/14/96 HP-9 89 <br /> 605-0657 ES3 10 5/14/96 HP-9 90 <br /> SEQUOIA ANALYTICAL, #1271 <br /> 0-gnature on File <br /> Alan S Kemp <br /> Project Manager Page 2 of 2 <br /> 6050647 MPD <2> <br />