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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Geek CA 94598 (925)986-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite B 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 /> E 551 Industrial Road San Carlos CA 94070-4111 (6501 232-9600 FAX(650)232-9611b <br /> Secor Client Project Ib Arco #4932 Stockton Sampled May 26, 1999 <br /> 9912 Business Park Dr, Suite#100 Sample Matrix Soil Received May 27, 1999 <br /> Sacramento, CA95827 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 1, 1999 <br /> Attention Rusty Benkosky First Sample # 905-2315 <br /> QG Batch Number SP052899 SP052899 SP052899 SP052899 <br /> 8020EXA 8020EXA 8020EXA 8020EXA <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> mg/Kg 905-2315 905-2316 905-2317 905-2318 <br /> VL-1 @3' VL-293' VL-393' VL-493' <br /> Purgeable <br /> Hydrocarbons 10 N D N D N D 3 2 <br /> Benzene 00050 N D N D N D 00068 <br /> Toluene 00050 N D N D 00065 0 013 <br /> Ethyl Benzene 00050 N D N D N D 0 035 • <br /> Total Xylenes 00050 N D 00051 0 027 0 095 <br /> MTBE 0 050 N D N D N D 0 061 <br /> Chromatogram Pattern -- -- -- Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 10 10 <br /> Date Analyzed 5/28/99 5/28/99 5/28/99 5/28/99 <br /> Instrument Identification HP-4 HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 107 109 103 90 <br /> (QC Limits = 40-140%) <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 /> SEQU IA ANALYTICAL, 01271 <br /> r r, <br /> Dimple Sharma <br /> Project Manager <br /> 9052303 SSS <3> <br />