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680 Chesapeake Dnve Redwood City CA 94063 1650)364-9600 FAX(654)364-9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 1925)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 (707)792-1865 FAX(707)792 0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232 9600 FAX(650)232 9612 <br /> Gettler-Ryan, Inc Client Project 10 Tosca #6981, Stockton Sampled May 24, 1999 <br /> 3164 Gold Camp Dr Sample Matrix Air Received May 25, 1999 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 8, 1999 <br /> Attention Steve Carter First Sample # 905-2151 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample <br /> Analyte Limit I D l D <br /> pg/L 905-2151 905-2152 <br /> I of Eff <br /> Purgeable <br /> Hydrocarbons 10 1,700 90 <br /> Benzene 0 050 91 058 <br /> Toluene 0 050 5 6 0 31 <br /> Ethyl Benzene 0 050 N D 0 075 <br /> Total Xylenes 0 050 10 0 58 <br /> MTBE 025 220 <br /> Chromatogram Pattern Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 100 1 0 <br /> Date Analyzed 5/26/99 5/26/99 <br /> Instrument Identification HIP-2 HIP-2 <br /> Surrogate Recovery, % 108 102 <br /> (QC 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 /> EQUOIA ANALYTICAL, #1271 <br /> ianne Fegley <br /> Project Manager <br /> ,¢ 9052151 G GG <1 n <br /> `may <br />