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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> la) 404 N Wiget Lane Walnut Creek CA 94598 (510) 968 9600 FAX {510) 988 9673 <br /> qwr Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> • MPDS Services Client Project ID Tosco#5886 2701 W March Lane Stockton Sampled Dec 1 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Dec 2, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 19, 1997 <br /> Attention Jarrel Crider First Sample # 712-0163 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Chromatogram DL Mult Date Instrument Surrogate <br /> Number Description Pattern Factor Analyzed ID Recovery, % <br /> OC Limits <br /> 70-130 <br /> 712-0163 MW1 -- 10 12/8/97 HP-2 107 <br /> 712-0164 MW2 - 40 12/8/97 HP-2 111 <br /> 712-0165 MW3 - 50 12/8/97 HP-2 105 <br /> 712-0166 MW4D -- 10 12/8/97 HP-2 108 <br /> 712-0167 MW4S -- 10 12/8/97 HP-2 94 <br /> i <br /> 712-0168 MWSD -- 10 12/8/97 HP-2 94 <br /> 712-0169 MWSS -- 10 12/8/97 HP-2 95 <br /> 712-0170 MW6D - 10 12/8/97 HP-2 101 <br /> 712-0171 MW6S 1 0 12/8/97 HP-2 95 <br /> 712-0172 MW7D - 10 12/8/97 HP-2 94 <br /> 712-0173 MW7S - 10 12/8/97 HP-2 96 <br /> SEQUOIA ANALYTICAL, #1271 <br /> signature on Fife <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7120163 MPD <2> <br />