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Sequoia 814 Striker Avenue 958 4 <br /> Sacramento CA 95834 <br /> 4 a_ .N (916)921-9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs com <br /> to <br /> Gettler Ryan-Rancho Cordova Project Tosco 6981, Stockton CA Sampled 513100 <br /> 3164 Gold Camp Dr Ste 240 Project Number N/A Received 514/00 <br /> Rancho Cordova,CA 95670 Project Manager Mike Mitchener Reported 518/00 <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 0050088 Date Prepared 515100 Extraction Method EPA 5030B(MeOH) <br /> Blank 0050088-BLK l <br /> Purgeable Hydrocarbons 515100 ND mg/kg too <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-Trifluorotoluene 0200 0165 600-140 82 5 <br /> LCS 0050088-BS1 <br /> Benzene 515100 0200 0 182 mg/kg 700-130 910 <br /> Toluene 0200 0 191 700-130 955 <br /> E enzene 0200 0 196 700-130 980 <br /> {total) 0 600 0 547 700-130 912 <br /> Me l ten-butyl ether 0200 0 163 700-130 815 <br /> Surrogate a a a-Trifluorotoluene 0200 0 175 600-140 875 <br /> Matrix Spike 0050088-MSI 5005099-01 <br /> Benzene 5/5100 0200 ND 0 164 mglkg 600-140 82 0 <br /> Toluene 0200 ND 0 174 600-140 870 <br /> Ethylbenzene 0200 ND 0 180 600-140 900 <br /> Xylenes(total) 0 600 ND 0 507 60 0-140 845 <br /> Methyl tent-butyl ether 0200 ND 0 132 600-140 660 <br /> Surrogate a a a-Trifluorotoluene 0200 0172 600-140 860 <br /> _Matrix Spike Dun 0050088-MSDI 5005099-01 <br /> Benzene 515100 0200 ND 0 165 mg/kg 600-140 825 250 0 608 <br /> Toluene 0200 ND 0 176 600-140 88 0 250 1 14 <br /> Ethylbenzene 0 200 ND 0 182 600-140 910 250 1 10 <br /> Xylenes(total) 0 600 ND 0 514 600-140 857 25 0 141 <br /> Methyl tert-butyl ether 0200 ND 0 143 600-140 715 250 800 <br /> Surrogate a a a-Trifluorotoluene 110200 0 179 IF 600-140 895 <br /> Sequoia Analytical-Sacramento *Refer to end of report for test of notes and definitions <br /> OZE Page 4of6 <br />