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,4 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ID 404 N Wiget[ane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> qwr Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> QPDS Services Client project I0 Tosca#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# 705-0203 <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 /> Mg/L 705-0203 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 /> • <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-36 HP-38 HP-313 HP-313 HP-313 <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 <br /> 0gnature on File <br /> Alan B Kemp <br /> Project Manager <br /> 7050197 MPD <8> <br />