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Sequoia 680 Chesapeake Dave 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 /> 11� Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> 14WWP0S Services Client Project ID Tosco#0123, 1034 Central Ave ,Tracy Sampled Jun 4, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Jun 4, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 20, 1997 <br /> Attention Jarrel Crider First Sample # 706-0358 <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 /> 706-0358 U-1 Gasoline 10 6-13-97 HP-5 104 <br /> 706-0359 U-2 Gasoline 10 6-13-97 HP-5 102 <br /> 706-0360 U-3 -- 10 6-13-97 HP-5 118 <br /> 706-0361 U-4 Gasoline 20 6-13-97 HP-5 101 <br /> SEQUOIA ANALYTICAL, #1271 <br /> 09nature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7060358 MPD <2> <br />