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(ZN Sequoia 680 Chesapeake Onve Redwood City,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �,IIy Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> O <br /> MPDS Services Client Project ID Unocal#0187,437 E Miner Ave, Stockton Sampled Nov 3, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Nov 3, 1997 <br /> Concord, CA 94520 Analyses Method EPA 5030/8015 Mod /8020 Reported Nov 18, 1997 <br /> Attention Jarrel Crider First Sample # 711-0119 <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 /> 711-0119 U 1 Gasoline 1 0 11/7/97 HP-4 107 <br /> 711-0120 U2 -- 1 0 11/7/97 HP-4 109 <br /> 711-0121 U3 Gasoline 50 11/7/97 HP-4 100 <br /> Unidentified <br /> 711-0122 U4 Hydrocarbons 1 0 11/7/97 HP-4 103 <br /> <C7* <br /> . 711-0123 U5 -- 10 11/7/97 HP-4 105 <br /> 711-0124 U6 -- 10 11/7/97 HP-4 104 <br /> 711-0125 U7 -- 10 11/7/97 HP-4 105 <br /> 711-0126 U8 -- 10 11/7/97 HP-4 107 <br /> 711-0127 U9 -- 10 11/7/97 HP-4 107 <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> *Unidentified hydrocarbons <C7 refers to unidentified peaks In the EPA 8010 range <br /> Ignature an File <br /> Alan S Kemp <br /> Project Manager Page 2 of 2 <br /> 7110119 MPD <2> <br />