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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ID 404 N Wget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> 14W Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> OPDS Services Client Project ID Tosco#2859, 1665 Pacific Ave Stockton Sampled May 7, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descnpt Water Received May 7, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported May 23, 1997 <br /> Attention Jarrel Crider First Sample # 705-0580 <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 /> 705-0580 MW 1 1 0 5-13-97 HP-2 75 <br /> 705-0581 MW 2 Gasoline 400 5-13-97 HP-2 82 <br /> 705-0582 MW 3 -- 10 5-13-97 HP-2 87 <br /> 705-0583 MW 4 Gasoline 1 0 5-13-97 HP-2 84 <br /> 705-0584 MW 5 1 0 5-13-97 HP-2 81 <br /> 705-0585 MW 6 -- 10 5-13-97 HP-2 87 <br /> 705-0586 MW 7 -- 10 5-13-97 HP-2 72 <br /> 705-0587 MW 8 -- 1 0 5-13-97 HP-2 82 <br /> 705-0588 MW 9 Discrete 1 0 5-13-97 HP-2 86 <br /> Peaks* <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> * 'Discrete Peaks refers to unidentified peaks in the EPA 8010 range <br />�cgnature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7050580 MPEG <2> <br />