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Sequoia 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 /> QPDS Services Client Project 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# 705-0197 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with STEX DISTINCTION <br /> i <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> pg/L pg/L pg/L pg/L Ng/L <br /> 705-0197 MW-1 ND ND ND ND ND <br /> 705-0198 MW-2 ND 43 ND ND ND <br /> 705-0199 MW-3 ND 32 ND ND ND <br /> 705.0200 MW-4D ND ND ND ND ND <br /> 705-0201 MW-4S ND ND ND ND ND <br /> 705-0202 MW-5D ND ND ND ND ND <br /> 705-0203 MW-5S ND ND ND ND ND <br /> 705-0204 MW-6D ND ND ND ND ND <br /> 705-0205 MW-6S ND ND ND ND ND <br /> i <br /> 705-0206 MW-71) ND ND ND ND ND <br /> Detection Limits 50 050 0 50 050 050 <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as ND were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> Wnature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7050197 MPD <1> <br />