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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%73 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> 1415 mqw Analytical t551 IndustrialrillRoad North Ste D San(uma CA 94954 (707�Carlos CA 94070 41 1 1 (650)232-9600 FAX(650) 232-96865 FAX(707) 42 <br /> Secor Client Project ID Arco #4932 Stockton Sampled May 26, 1999 <br /> 9912 Business Park Dr, Suite #100 Sample Matrix Soif Received May 27, 1999 <br /> Sacramento, CA95827 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 1, 1999 <br /> Attention Rusty Benkosky First Sample # 905-2303 <br /> QC Batch Number SP052799 SP052799 SP052799 SP052799 SP052799 SP052799 <br /> 8020EXA 8020EXA 8020EM 8020EXA 8020EXA 8020EM <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 I D <br /> mg/Kg 905-2303 905-2304 905-2305 905-2306 905-2307 905-2308 <br /> -- D1 @3 5' D2@3 5' D31@4' D493' D5@4' PL-1@3' <br /> Purgeable <br /> Hydrocarbons 10 N D 26 450 250 3,000 N D <br /> Benzene 00050 N D 0 014 029 0 99 23 N D <br /> Toluene 00050 N D 0 033 0 52 63 96 0 010 <br /> Ethyl Benzene 00050 N D Oil 3 2 45 89 N D <br /> Total Xylenes 00050 N D 073 16 29 530 0 017 <br /> MTBE 0 050 0 060 N D N D 19 200 N D <br /> Chromatogram Pattern Gasoline Gasoline Gasoline Gasoline -- <br /> Quality Control Data -- <br /> Report Limit Multiplication Factor 1 0 1 0 20 20 100 1 0 <br /> Date Analyzed 5/27/99 5/27/99 5/28/99 5/27/99 5/27/99 5/27/99 <br /> Instrument Identification HP-4 HP-4 HP-4 HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 107 56 200' 147 * 100 <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 /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> Surro ate covery below control limit due to dilution <br /> �u « iia rr#overy above(,ontrol iirnit due to coelution <br /> Dimple Sharma ( i <br /> Project Manager <br /> JUN <br /> L)+ 9052303 SSS <i> <br />