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rl � <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA -9600 <br /> 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs tom <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA Sampled 611100 to 616100 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 6/8100 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 6/19100 <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 /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS(continued) 0060131-BSI <br /> Methyl tert-butyl ether 6/13/00 0200 0 152 mg/kg 700-130 760 <br /> Surrogate a,a,a-Trefluorotoluene 10 0200 0222 600-140 111 <br /> Matrix Spike 0060131-MSI S006120-36 <br /> Benzene 6113100 0200 ND 0 180 mg/kg 600-140 900 <br /> Toluene 0200 ND 0 184 600-140 920 <br /> Ethylbenzene 0200 ND 0 178 600-140 890 <br /> Xylenes(total) 0 600 ND 0 494 600-140 823 <br /> Methyl tert-butyl ether 0200 ND 0 176 600-140 880 <br /> Surrogate a a a-Trifluoratoluene 0200 0 240 600-140 120 <br /> Matrix Spike Dun 0060131-MSDI 5006120-36 <br /> Benzene 6/13100 0200 ND 0 181 mg/kg 600-140 905 25 0 0 554 <br /> Tdh <br /> e 0200 ND 0 186 600-140 930 25 0 108 <br /> E enzene 0200 ND 0 182 600-140 910 25 0 2 22 <br /> Xylenes(total) 0 600 ND 0 502 600-140 837 25 0 169 <br /> Methyl.tert-butyl ether 0200 ND 0 137 600-140 685 25 0 249 <br /> Surrogate a,a,a-Tr¢fluorotoluene 0200 0 232 600-140 116 <br /> Batch 0060148 Date Prepared 6/14/00 Extraction Method EPA 5030E McOH <br /> Blank 0060148-BLK1 <br /> Purgeable Hydrocarbons 6/14/00 ND mg/kg 100 <br /> Benzene ND 1. 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 0 192 600-140 960 <br /> LCS 0060148-BS1 <br /> Benzene 6114100 0200 0 186 mg/kg 700-130 930 <br /> Toluene 0200 0 194 700-130 970 <br /> Ethylbenzene 0200 0 194 700-130 970 <br /> Xylenes(total) 0 600 0 545 700-130 908 <br /> Methyl tert-butyl ether 0200 0 169 700-130 845 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0196 600-140 980 <br /> Matrix Spike 0060148-MSI 5006136-01 <br /> Benzene 6114100 0200 ND 0 146 mg/kg 600-140 73 0 <br /> Toluene 0200 ND 0 145 600-140 72 5 <br /> Elbe nzene 0 200 ND 0 152 600-140 760 <br /> Sequoia Analytical-Sacramento "Refer to end of report for text of notes and definitions <br /> Page 22 of 27 <br />