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Sequoia 680 Chesapeake Dnve 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 /> qwrAnalytical 819 Striker Avenue,Swte 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> WPDS Services Client Protect ID Tosco#5886,2701 W March Ln, Stockton Sampled May 2, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descrlpt 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# 705-0207 <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 /> OC Limits <br /> 70-130 <br /> 705-0207 MW-7S -- 10 5/7/97 HP-2 86 <br /> 705-0208 ES-1 -- 10 5/7/97 HP-2 87 <br /> 705-0209 ES-2 -- 10 5/7/97 HP-2 87 <br /> 705-0210 ES-3 -- 1 0 5/7/97 HP-2 94 <br /> • <br /> SEQUOIA ANALYTICAL, #1271 <br /> 0ignature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7050197 MPD <4> <br />