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ty,CA <br /> (650)364-9600 FAX <br /> Sequoia 404 Chesapeake <br /> Whet Lae Redwood Walnut reelk,CA 945 83 (925)988-9600 FAX(925)98&9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921.9600 FAX(916)921-0 100 <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 /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2110199 to 2/12/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 314/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/10199 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Pre ared Analyzed Limits Limit Result Units Notes* <br /> Mw-311 10(continued) S903078-07 Sa <br /> 1,1,1,2-Tetrachloroethane 9020258 2/22199 2/22/99 100 ND ug/kg <br /> 1,1,2,2-Tetrachloroethane 100 ND " <br /> Tetrachloroethene 100 ND " <br /> Toluene 100 ND " <br /> 1,2,3-Trichlorobenzene 100 ND " <br /> 1,2,4-Trichlorobenzene 100 ND " <br /> l,1,1-Trichloroethane 100 ND " <br /> 1,1,2-Trichloroethane 100 ND " <br /> Trichloroethene 100 ND <br /> Trichlorofluoromethanc 500 ND " <br /> 1,2,3-Trichloropropane 100 ND " <br /> 1,2,4-Trimethy[benzene 100 ND <br /> 1,3,5-Trimethylbenzene 100 ND " <br /> yl chloride 500 ND " <br /> 1 Xylenes _ 100 128 " <br /> arrogate: Dibromofluoromethane 70.0-130 _ 86.4 % <br /> Surrogate: 1,2-DCA-d4 70.0-130 88.0 <br /> Surrogate: Toluene-d8 70.0-130 82.4 " <br /> Surrogate: 4-BFB 70.0-130 76.0 " <br /> ,Tmuoia Analytical -Sacramento *Refer to end of report for text of nates and definitions <br /> Sandra R. Hanson,Client Services Representative Page 15 of 29 <br />