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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtget 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 /> 0 <br /> MPDS Services Client Project ID Unocal#0123 1034 Central Ave,Tracy Sampled Dec 2, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descrlpt Water Received Dec 2, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 23, 1997 <br /> Attention Jarrel Crider First Sample # 712-0369 <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 /> 712-0369 U 1 Gasoline 10 12/9/97 HP-2 115 <br /> 712-0370 U 2 Gasoline 10 12/9/97 HP-2 114 <br /> 712-0371 U 3 -- 10 12/9/97 HP-2 108 <br /> 712-0372 U 4 Gasoline 40 12/9/97 HP-2 153 <br /> SEQUOIA ANALYTICAL, #1271 <br /> dkignature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7120369 MPD <2> <br /> as <br />