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4a <br /> 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 9073 <br /> Analytical <br /> alyt cal Big 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 Sample Matrix Water Received May 3, 1997 <br /> Concord, CA 94520 Analysis Method EPA 3510/8015 Mod Reported May 15, 1997 <br /> Attention Jarrel Crider First Sample# 705-0197 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID ID ID ID <br /> pg/L 705-0197 705-0198 705-0199 705-0200 705-0201 705-0202 <br /> MW-1 MW-2* MW-3* MW-4D* MW-4S MW-5D* <br /> Extractable <br /> Hydrocarbons 50 N D 53 120 170 N D 90 <br /> Chromatogram Pattern - Discrete Discrete Discrete Discrete <br /> Peaks Peaks Peaks Peaks <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 1 0 1 0 10 <br /> Date Extracted 5/8/97 5/8/97 5/8/97 5/8/97 5/8/97 5/8/97 <br /> Date Analyzed 5/9/97 5/9/97 5/9/97 5/9/97 5/9/97 5/9/97 <br /> Instrument Identification HP-3A HP-3A HP-3A HP-3A HP-36 HP-3B <br /> Extractable Hydrocarbons are quantitated against a fresh diesel standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> * This sample does not appear to contain diesel "Discrete Peaks' refers to unidentified <br /> ignature on File peaks in the EPA 8270 range <br /> Alan B Kemp <br /> Project Manager <br /> 7050197 MPD <7> <br />