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Sequoia 10680 Chesapeake Drive Redwood City,CA 9406(415) 364 9600 FAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Swte 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> OLDS Services Client Project ID Unocal#5886 2701 W March Ln,Stockton Sampled Mar 7, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Mar 7, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Mar 21, 1997 <br /> Attention Jarrel Crider First Sample# 703-0718 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Chromatogram DI_Mult Date Instrument Surrogate <br /> Number Description Pattern Factor Analyzed ID Recovery, % <br /> QC Limits <br /> 70-130 <br /> 703-0718 MW-1 -- 10 3/13/97 HP-4 107 <br /> 703-0719 MW-2 -- 10 3/13/97 HP-4 102 <br /> 703-0720 MW-3 -- 10 3/13/97 HP-4 101 <br /> • <br /> SEQUOIA ANALYTICAL, #1271 <br /> signature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7030718 MPD <2> <br />