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4D 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 /> woAnalytical 819 Striker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> qPDS Services Client Project ID Unocal#0123, 1034 Central Ave,Tracy Sampled Sep 5, 1995 <br /> 2401 Stanwell Dr , Ste 300 Matrix Descript Water Received Sep 5, 1995 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Sep 19, 1995 <br /> Attention Sarkis Karkarian First Sample # 509-0207 <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 /> 509-0207 U1 Gasoline 10 9/12/95 HP-9 98 <br /> 509-0208 U2 -- 10 9/12/95 HP-9 91 <br /> 509-0209 U3 -- 10 9/12/95 HP-9 95 <br /> 509-0210 ES1 -- 10 9/12/95 HP-9 94 <br /> 509-0211 ES2 -- 10 9/12/95 HP-9 97 <br /> 509-0212 ES3 -- 10 9/12/95 HP-9 95 <br /> SEQUOIA ANALYTICAL, #1271 <br /> Ognature on File <br /> Alan B Kemp <br /> Project Manager <br /> 5090207 MPD <2> <br />