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41) Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> W„>F Analytical 819 Stnker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 08 Services Client Project ID Unocal#6981,4707 Pacific Ave Stockton Sampled Jan 20-21, 97 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Jan 21, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Feb 4, 1997 <br /> Attention Jarrel Crider First Sample# 701-1160 <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 /> QC Limits <br /> 70-130 <br /> 701-1160 MW-1 1 0 1/28/97 HP-4 97 <br /> 701-1161 MW-2 Gasoline 1 0 1/28/97 HP-4 99 <br /> 701-1162 MW-4 -- 10 1/28/97 HP-4 96 <br /> 701-1163 MW-5 -- 10 1/28/97 HP-4 97 <br /> 701-1164 MW-6 -- 10 1/28/97 HP-4 95 <br /> 701-1165 MW-7 -- 1 0 1/28/97 HP-4 96 <br /> 701-1166 MW-8 Gasoline 10 1/28/97 HP-5 98 <br /> 701-1167 MW-9 1 0 1/28/97 HP-4 97 <br /> 701-1168 MW-11 -- 10 1/28/97 HP-4 95 <br /> SEQUOIA ANALYTICAL, #1271 <br /> &ure on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7011160 MPD <2> <br /> tSt'l <br />