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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (4t5) 364 9233 <br /> ,!D— 404 N W,iw Lane Walnut Creck CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avcnuc Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ISPDS Services Client Project ID Tosco#5686 2701 W March Ln Stockton Sampled May 2, 1997 <br /> 1401 Stanwell Dr , Ste 300 Matrix Descript Water Received May 3, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported May 14, 1997 <br /> Attention Jarrel Crider First Sample # 705-0197 <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 /> 705-0197 MW-1 10 5/6/97 HP-2 81 <br /> 705-0198 MW-2 10 5/6/97 HP-2 83 <br /> 7050199 MW 3 -- 1 0 5/6/97 HP-2 85 <br /> 705-0200 MW-4D 10 5/6/97 HP-2 87 <br /> 705-0201 MW 4S 1 0 5/6/97 HP-2 85 <br /> 705-0202 MW-5D - 10 5/6/97 HP-2 85 <br /> 705-0203 MW-5S - 10 5/6/97 HP-2 91 <br /> 705-0204 MW-6D - 10 5/6/97 HP-2 98 <br /> 705-0205 MW-6S - 10 5/6/97 HP-2 82 <br /> 705-0206 MW-7D - 10 5/7/97 HP-2 79 <br /> SEQUOIA ANALYTICAL, #1271 <br /> 4nature on File <br /> aan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7050197 MPD <2> <br />