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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> w404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �� Analytical 819 Sulker Avenue Suue 8 Sacramento CA 95834 (916)921-9600 FAX(916)9I1-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Pacific Environmental Group- Sac Project Chevron 9-9840,Stockton,CA Sampled 9/22/98 <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 % Limit % Notes* <br /> Batch, 8104.017 Date Prepared. 1011198 Extraction Method, EPA 5030H(Me011) <br /> Blank 8140017-BLK 1 <br /> Purgeable Hydrocarbons 10/1/98 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0205 600-140 102 <br /> LACS 8100017-BS1 <br /> Benzene 1011/98 0200 0 215 mg/kg 700-130 108 <br /> Toluene 0200 0205 700-130 102 <br /> Ethylbenzene 0200 0205 70 0430 102 <br /> Xylenes(total) 0 600 0 606 700-130 101 <br /> c::, <br /> a-Trifluorotoluene 0100 0103 600-140 101 <br /> 8100017-M S 1 S809296-06 <br /> Benzene 10/1/98 0200 ND 0202 mg/kg 600-140 101 <br /> Toluene 0200 ND 0 197 600-140 985 <br /> Ethylbenzene 0200 ND 0 199 600-140 995 <br /> Xylenes(total) 0 600 ND 0 590 600-140 98 3 <br /> Surrogate a a,a-Triuorotoluene 0200 0 199 600-140 995 <br /> 8100017-MSD1 S802296-06 <br /> Benzene 1011/98 0200 ND 0201 mg/kg 600-140 101 250 0 <br /> Toluene 0200 ND 0 188 600-140 940 25 0 468 <br /> Ethylbenzene 0200 ND 0 196 600-140 980 25 0 152 <br /> Xylenes(total) 0 600 ND 0 583 600-140 972 25 0 1 13 <br /> Surrogate a a,a-Trifluoratoluene 0200 0201 600-140 101 <br /> Occq—iuoi, <br /> nalytical-Sacramento *Refer to end ofrePortIor text o1notes and definitions <br /> nitionschnee <br /> er, Laboratory Director Page 3 of 4 <br />