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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 1707)792-E865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070 4111 (650)232-9600 FAX(650)232-9612 <br /> 4etnller Ryan, Inc Client Project ID UES , Stockton #1140124 Sampled Apr 20, 1999 <br /> 3164 Gold Camp Drive, #240 Sample Matrix Air Received Apr 20, 1999 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015 Mod /8020 Reported Apr 30, 1999 <br /> Attention Steve Carter First Sample # 904-1730 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit ID ID <br /> erg/L 904-1730 904-1731 <br /> EFF INF <br /> Purgeable <br /> Hydrocarbons 10 95 1,600 <br /> Benzene 0 050 017 29 <br /> Toluene 0 050 0 064 22 <br /> Ethyl Benzene 0 050 N D 0 74 <br /> • Total Xylenes 0 050 013 38 <br /> Chromatogram Pattern Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 <br /> Date Analyzed 4/21/99 4/21/99 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 96 164* <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL 1271 Please Note <br /> Surrogate recovery outside the EPA acceptance limits due to coelution <br /> *J?iannke Fegley <br /> Project Manager <br /> 9049730 GGG <1> <br /> I <br />