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Sequoia 819 Straker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> 4 (9 l6)921-9600 <br /> FAX(9 16)921-0 100 <br /> a,) Analytical www sequoialabs com <br /> Gettler-Ryan-Rancho Cordova Project Tosca 6981, Stockton, CA Sampled 5/3100 <br /> 3164 Gold Camp Dr, Ste 240 Project Number NIA Received 514/00 <br /> Rancho Cordova,CA 95670 Project Manager Mike Mitchener Reported 5115100 <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 5/5/00 Extraction Method EPA 5030B McOH <br /> Blank 0050088-BLKI <br /> Purgeable Hydrocarbons 5/5/00 ND mg/kg 100 <br /> Benzene " ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) '1 ND 000500 <br /> Methyl tert-butyl ether „ ND 00500 <br /> Surrogate a a,a-Trifluorotoluene 0200 0 165 600-140 825 <br /> LCS 0050088-BSI <br /> Benzene 515100 0200 0 182 mg/kg 700-130 910 <br /> Toluene 0200 0 191 700-130 955 <br /> Ethylbenzene 0200 0 196 700-130 980 <br /> X (total) 0 600 0 547 700-130 912 <br /> tert-butyl ether 0200 0 163 700-130 815 <br /> Surrogate a a a-Trifluorotoluene 0200 0 175 600-140 875 <br /> Matrix Spike 0050088-MS1 5005099-01 <br /> Benzene 515/00 0200 ND 0 164 mg/kg 600-140 820 <br /> Toluene 0200 ND 0 174 600-140 870 <br /> Ethylbenzene 0200 ND 0 180 600-140 900 <br /> Xylenes(total) 0 600 ND 0 507 600-140 845 <br /> Methyl cert-butyl ether 0 200 ND 0 132 600-140 66 0 <br /> Surrogate a s a-Trifluorotoluene 0200 0 172 600-140 860 <br /> Matrix Spike Dup 0050088-MSD1 S005099-01 <br /> Benzene 515100 0200 ND 0 165 mg/kg 600-140 825 250 0 608 <br /> Toluene 0200 ND 0 176 600-140 880 250 114 <br /> Ethylbenzene 0200 ND 0 182 600-140 910 250 110 <br /> Xylenes(total) 0 600 ND 0 514 600-140 857 250 141 <br /> Methyl tert-butyl ether 0200 ND 0 143 600-140 715 250 800 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0179 600-140 895 <br /> Sequoia Analytical-Sacramento 'Refer to end of report for text of notes and definitions <br /> Page 4 of 6 <br />