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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 945988 (925)988-9600 FAX(975)988-9673 <br /> 44117 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 0 <br /> Pacific Environmental Group- Sac Project Chevron 9-9840, Stockton,CA Sampled 9/28/98 <br /> 11315 Sunrise Gold Circle St M Project Number 920-122 1C Received 9/30/98 <br /> Rancho Cordova,CA 95742 Project Manager Tim Anenson Reported 10/13/98 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Lirmt % Notes* <br /> LCS(continued) 8100084-BSI <br /> Ethylbenzene 10/6/98 0200 0 217 mg/kg 700-130 108 <br /> Xylenes(total) 0 600 0 632 700-130 105 <br /> Surrogate a,a a-Tnfluorotoluene 0200 0204 600-140 102 <br /> Matrix Spike 8100084-MS1 5809376-14 <br /> Benzene 1016/98 0200 ND 0203 mg/kg 600-140 101 <br /> Toluene 0200 ND 0200 600-140 100 <br /> Ethylbenzene 0200 ND 0204 600-140 102 <br /> Xylenes(total) 0 600 ND 0 600 600-140 100 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 217 600-140 108 <br /> Matrix Spike Dun 8100084-M5121 5809376-14 <br /> Benzene 10/6/9$ 0200 ND 0 197 mg/kg 600-140 985 25 0 251 <br /> uene 0200 ND 0 183 1; 600-140 91 5 25 0 8 88 <br /> ylbenzene 0200 ND 0 197 600-140 985 25 0 349 <br /> ylenes(total) 0 600 ND 0 584 600-140 973 25 0 274 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 211 " 600-140 105 <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br />�fjnMdaC Sch eider,Laboratory erector Page 4 of 5 <br />