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*Chesapeake Drive Redwood City CA63 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N 1Wlget lane Walnut Geek.CA 94598 (925)988-9600 FAX(925)988-%73 <br /> �► Analytical 819 Striker Avenue Suite B Sacramento CA 95834 (916)921-%0o FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste 0 Petaluma,CA 94954 (707)792-1865 FAX(747)79Z-0342 <br /> Upgradient Environmental(Stockton) Project Electro Delta Sampled 11/25/98 <br /> P O Box 8002 Project Number 98036 Received 11/25/98 <br /> Stockton,CA 95208 Pro ect Manager Victor Cherven Reported 12/10/98 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and AME by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analvte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch, 812_Q442 Date Prepared. 121212 F.Xtr2ctlao Method, EPA 5G30B-(MeM <br /> Blank 8120042-BLKl <br /> Purgeable Hydrocarbons 1212198 NO mg/kg 100 <br /> Benzene NO 000500 <br /> Toluene NO 000500 <br /> Ethylbenzene NO D00500 <br /> Xylenes(total) NO 000500 <br /> Methyl tett-butyl ether ND 00500 <br /> Surrogate a,a,a-Trtfluorotoluene 0200 0 195 600-140 975 <br /> LCC 8120042 X51 <br /> Benzene 12/2/98 0200 0 220 mg/kg 700-130 110 <br /> Toluene 0200 0 21 1 700-130 105 <br /> Ethylbenzene 0200 0209 700-130 105 <br /> enes(total) 0 600 0 619 700-130 103 <br /> yl tert-butyl ether 0200 0202 700-130 101 <br /> arrogate a,a,a-7'r fluorotoluene 0200 0195 600-140 975 <br /> Matrix Spike 8120042-MSI 5811383-01 <br /> Benzene 1212198 0200 ND 0 193 mg/kg 600-140 965 <br /> Toluene 0200 ND 0 196 600-140 980 <br /> Ethylbenzene 0200 ND 0 190 600-140 950 <br /> Xylenes(total) 0 600 ND 0 571 600-140 952 <br /> Methyl tert-butyl ether 0200 ND 0 169 600-140 845 <br /> Surrogate a a a-Trifluorotoluene 0200 0 196 600-140 980 <br /> 8120042-MSDl S811383-01 <br /> Benzene 1212/98 0200 ND 0 187 mg/kg 600-140 935 25 0 316 <br /> Toluene 0200 ND 0 183 600-140 915 25 0 686 <br /> Ethylbenzene 0200 ND 0 183 600-140 915 25 0 3 75 <br /> Xylenes(total) 0 600 ND 0 552 600-140 920 25 0 3 42 <br /> Methyl tert-butyl ether 0200 ND 0 166 600-140 830 25 0 179 <br /> Surrogate aaa-Trfluorotoluene 0200 0198 600-140 990 <br /> uoia Analytical-Sacramento *Refer to end of report for tex of notes and definitions <br /> Xinc Schnee er,Laboratory Director Page 4 of 6 <br />