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680 Che-%apeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br />' Sequoia 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(92 5)988-9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> v1W1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 9 <br /> Pacific Environmental Group-Sac Project Chevron 9-9840, Stockton,CA Sampled 9122/98 <br /> 11315 Sunrise Gold Circle St M Project Number 920-122 1C Received 9/22/98 <br /> Rancho Cordova,CA 95742 Project Manager Tim Anenson Reported 9/23/98 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE 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. 8090213 Date Prepared, 9123148 Extraction Method, EPA 5Q30H(MeOW <br /> Blank 8090213-131 A1 <br /> Purgeable Hydrocarbons 9/22/98 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether ND 00500 <br /> Surrogate a,a a-Tris luorotoluene 0200 0 192 600-140 960 <br /> ICS 8090213-13SI <br /> Benzene 9122198 0200 0 212 mg/kg 700-130 106 <br /> Toluene 0200 0202 700-130 101 <br /> Ethylbenzene 0200 0202 700-130 101 <br /> lenes(total) 0 600 0 600 700-130 100 <br /> thyl tert-butyl ether 0200 0 195 700-130 975 <br /> RIJ rrogate a,a a-Tri luorotoluene 0200 0189 600-140 945 <br /> Matrix Spike 8090213-MSI 5809162-03 <br /> Benzene 9/22/98 0200 ND 0 189 mg/kg 600-140 945 <br /> Toluene 0200 ND 0 183 600-140 91 5 <br /> Ethylbenzene 0200 ND 0 184 600-140 920 <br /> Xylenes(total) 0 600 ND 0 552 600-140 920 <br /> Methyl tert-butyl ether 0200 ND 0 183 600-140 91 5 <br /> Surrogate a,a,a-Tr{Jluorotoluene 0200 0183 600-140 915 <br /> Matrix Spike Dun 8090213-MSD] S809162-03 <br /> Benzene 9/22/98 0200 ND 0 184 mg/kg 600-140 92 0 25 0 268 <br /> Toluene 0200 ND 0 178 600-140 890 25 0 277 <br /> Ethylbenzene 0200 ND 0 179 600-140 895 250 275 <br /> Xylenes(total) 0 600 ND 0 539 600-140 898 25 0 242 <br /> Methyl tert-butyl ether 0200 ND 0 179 600-140 895 250 2 21 <br /> Surrogate a,a,a-Triuorotoluene 0200 0 185 600-140 92 5 <br /> is <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> ee'r <br /> inda C Schneider,Laboratory Director Page 4 of 6 <br />