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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 6 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)Z3Z 9600 FAX(650)232-9612 <br /> Ocor Client Project ID 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 # 905-2309 <br /> QC Batch Number SP052799 SP052799 SP052799 SP052799 SP052899 SP052899 <br /> 8020EXA 8020EXA 8020EXA 8020EM 8020EXA 8020EXA <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D I D 1 D <br /> mg/Kg 905-2309 905-2310 905-2311 905-2312 905-2313 905-2314 <br /> PL-293' PL-31@3' PL-4@3' PL-5@3' PL-693' VP-1 @6 5' <br /> Purgeable <br /> Hydrocarbons 10 N D N D N D 290 360 1 4 <br /> Benzene 00050 N D 00053 N D 047 025 00052 <br /> Toluene 00050 N D 0 027 N D 2 8 095 00063 <br /> Ethyl Benzene 00050 N D N D N D 72 1 5 0 014 <br /> 4Rotal Xylenes 00050 N D 0 034 N D 18 61 0 069 <br /> MTBE 0 050 N D N D N D 1 7 25 N D <br /> Chromatogram Pattern - -- Gasoline Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 20 20 1 0 <br /> Date Analyzed 5/27/99 5/27/99 5/27/99 5/27/99 5/28/99 5/28/99 <br /> Instrument Identification HP-4 HP-4 HP-4 HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 106 104 83 160" 193" 99 <br /> (OC 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 /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> 'Surrogate recovery above control limit due to coeiution <br /> Dimple Sharma <br /> Project Manager <br /> 9052303 SSS <2> <br />