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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> j 40411 W,gel lane Walnut Creck CA 94598 (510) 988 9600 FAX (510) 988 9V3 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> DS Services Client Project ID Tosco#5886 2701 W March Ln Stockton Sampled May 2 1997 <br /> 401 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 # 705-0203 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <br /> Reporting Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D I D <br /> Ng/L 7050203 705-0204 705 0205 705 0206 705-0207 <br /> MW-5S MW-6D MW-6S MW 7D MW-7S <br /> Extractable <br /> Hydrocarbons 50 N D N D N D N D N D <br /> Chromatogram Pattern <br /> 10 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 10 1 0 1 0 <br /> Date Extracted 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 <br /> Instrument Identification HP-313 HP-313 HP-38 HP-36 HP-315 <br /> Extractable Hydrocarbons are quantitated against a fresh diesel standard <br /> Analytes reported as N 0 were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> 0gnature on File <br /> Alan B Kemp <br /> Project Manager <br /> 7050197 MPD <8> <br />