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Sequoia 680 Chesapeake Drive 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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> WPD8 Services Client Project ID Unocal#0187,437 E Miner Ave,Stockton Sampled Feb 3, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descrlpt Water Received Feb 3, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Feb 14, 1997 <br /> Attention Jarrel Crider First Sample # 702-0227 <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 /> 702-0227 U-1 Gasoline 50 2/7/97 HP-5 90 <br /> 702-0228 U-2 -- 10 2/7/97 HP-5 102 <br /> 702-0229 U-3 Gasoline 200 2/7/97 HP-5 90 <br /> 702-0230 U-4 Gasoline& 1 0 2/7/97 HP-5 93 <br /> Unidentified <br /> Hydrocarbons<C7" <br /> 702-0231 U-5 -- 10 2/7/97 HP-5 107 <br /> i <br /> 702-0232 U-6 -- 10 2/7/97 HP-5 104 <br /> 702-0233 U-7 Gasoline& 1 0 2/7/97 HP-5 103 <br /> Unidentified <br /> Hydrocarbons<C7^ <br /> 702-0234 U-8 Gasoline& 1 0 2/7/97 HP-5 94 <br /> Unidentified <br /> Hydrocarbons<C7^ <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> "Unidentified Hydrocarbons DC7 refers to unidentified peaks in the EPA 8010 range <br /> Signature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7020227 MPD <2> <br />