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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N W,get lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-9673 <br /> 819 Stryker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)92t-010 0 <br /> �,� Analytical <br /> k455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792 0342 <br /> Ir <br /> Gettler-Ryan-Sac Project Chevron 9-3232,Stockton,CA Sampled 10/29/98 to 10/30/98 <br /> 3164 Gold Camp Dr, Ste 240 Project Number 34646301 Received 10/30/98 <br /> Rancho Cordova,CA 95670 Project Manager Todd Del Crate Reported 11110/98, 11/13/98 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LU)F'1/Quality Control <br /> Sequoi.i Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analy/ed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS(confirmed) 8110156-BSI <br /> Methyl tert-butyl ether 11/12/98 0 200 0 208 mg/kg 700-130 104 <br /> Surrogate a a a-Trrfluotololuene 0200 0 197 600-140 98 5 <br /> Matrix Smkc 8110156-MSl S131115_4_-0 <br /> Benzene 11/12/98 0200 ND 0 187 mg/kg 600-140 93 5 <br /> Toluene 0200 ND 0 ISO 600-140 900 <br /> Ethylbenzene 0200 ND 0 178 600-140 89 0 <br /> Xylenes(totil) 0 600 ND 0 535 600-140 89 2 <br /> Methyl tert-butyl ether 0200 ND 0 195 600-140 975 <br /> Sur rogafe aaa-Trffliror olallrcnt 0200 0 196 600-140 98 0 <br /> Matrty SpikeDno 8110156-MSD1 5811154-03 <br /> Benzene 11/12/98 0 200 ND 0 188 mg/kg 600-140 94 0 250 0 533 <br /> 4#y' ,,nzene <br /> une 0200 ND 0 174 600-140 870 25 0 339 <br /> lb0200 ND 0 178 600-140 89 0 25 0 0 <br /> lenes(total) 0 600 ND 0 531 600-140 895 25 0 0788 <br /> Methyl tert-butyl ether 0200 ND 0 195 600-140 97 5 25 0 0 <br /> Surrogate aaa-Difluorolohrene 0200 0 199 600-140 99 5 <br /> Rc c y to end o i e por! or leaf o Motes card de urrtrous <br /> quota Anllytical-S.iu�un * <br /> cnto ,l f 1 f � ./� <br /> V�"`da C Schneider, Laboratoty Director Page 8 of <br /> s <br />