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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 /> 4D <br /> � 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 /> i <br /> Pacific Environmental Group-Sac Project Chevron 9-9840,Stockton,CA Sampled 9124198 <br /> 11315 Sunrise Gold Circle St M Project Number 920-122 1 C Received 9128198 <br /> Rancho Cordova,CA 95742 Project Mama er Tim Anenson Reported 10/12/98 <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, 8100017 Date Prepare 1011198 Extraction Method, EPA 5030D(Mr= <br /> Blank 810QQ417-111,]Kl <br /> Purgeable Hydrocarbons 1011198 ND mg/kg 1 00 <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 /> LAS 8100017-BSI <br /> Benzene 1011198 0200 0 215 mg/kg 700-130 108 <br /> Toluene 0200 0205 700-130 102 <br /> Ethylbenzene 0200 0205 700-130 102 <br /> Xylenes(total) 0 600 0 606 700-130 101 <br /> rogate a a,a-Triuorotoluene 0200 0203 600-140 101 <br /> 8100017-MSI 5809296-06 <br /> Benzene 10/1/98 0200 ND 0202 mg/kg 600-140 101 <br /> Toluene 0200 ND 0 197 600-140 98 5 <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 0199 600-140 995 <br /> Matrix S rkp a Dt 8100017-MSD1 5809296-06 <br /> Benzene 10/1/98 0200 ND 0201 mg/kg 600-140 101 25 0 0 <br /> Toluene 0200 ND 0 188 600-140 940 250 468 <br /> Ethylbenzene 0200 ND 0 196 600-140 98 0 25 0 152 <br /> Xylenes(total) 0 600 ND 0 583 600-140 972 250 113 <br /> Surrogate a a,a-Tnfluorotoluene 0200 0201 600-140 101 <br /> 0 <br /> equota Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Linda C Schneider,Laboratory Director Page 3 of 4 <br />