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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Cane '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 /> �„�� <br /> *PDS Services Client Project ID Unocal#0123, 1034 Central Ave,Tracy Sampled Dec 2, 1997 <br /> 2401 Stanwell Dr , Ste 300 Sample Matrix Water Received Dec 2, 1997 <br /> Concord, CA 94520 Analysis Method EPA 3510/8015 Mod Reported Dec 23, 1997 <br /> Attention Jarrel Crider First Sample # 712-0369 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS W/SILICA GEL CLEAN-UP <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit ID ID I.D ID <br /> Mg/L 712-0369 712-0370 712-0371 712-0372 <br /> U1* U2* U3 U4* <br /> Extractable <br /> Hydrocarbons 50 72 67 N D 2500 <br /> Chromatogram Pattern Unidentified Unidentified -- Unidentified <br /> Hydrocarbons Hydrocarbons Hydrocarbons <br /> <C15 <C15 <C15 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 1 0 <br /> Date Extracted 12/9/97 12/9/97 12/9/97 12/9/97 <br /> Date Analyzed 12/9/97 12/9/97 12/9/97 12/10/97 <br /> Instrument Identification HP-313 HP-36 HP-313 HP-36 <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 Unidentified hydrocarbons <C15 <br /> ignature on File are probably gasoline <br /> Alan B Kemp <br /> Project Manager <br /> 7120369 MPD <4> <br />