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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C95834 <br /> (916)922 1 9600 <br /> FAX(916)921 0100 <br /> Analytical www sequoialabs corn <br /> SECOR International- Rancho Cordova Project ARCO 2133,Stockton CA Sampled 10/23/00 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 10/24/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported ll/l/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE in Air by DHS LUIFT/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 0100322 Date Prepared 10/25/00 Extraction Method EPA 5030E PI <br /> Blank 0100322-BLKI <br /> Purgeable Hydrocarbons 10/25/00 ND mg/m'Air 100 <br /> Benzene ND 00500 <br /> Toluene ND 00500 <br /> Ethylbenzene ND 00500 <br /> Xylenes(total) ND 00500 <br /> Methyl t_ert-butyl ether _ _ ND 0 500 <br /> Surrogate a a a-Trifluorotoluene _ 200 230 600-140 115 <br /> LCS 0100322-BSI <br /> Benzene 10/25/00 200 2 13 mg/m'Air 700-130 107 <br /> Toluene 200 225 700-130 113 <br /> E nzene 200 2 19 700-130 110 <br /> X 1(total) 600 620 700-130 103 <br /> Me y tert-butyl ether 200 229 700-130 114 <br /> Surrogate a,a,a-Trifluorotoluene 200 234 600-140 117 <br /> LCS Duo 0100322-1131SDI <br /> Benzene 10/25/00 200 219 mg/m'Air 700-130 110 25 0 276 <br /> Toluene 200 228 700-130 114 250 0 881 <br /> Ethylbenzene 200 224 700-130 112 250 180 <br /> Xylenes(total) 600 630 700-130 105 250 192 <br /> Methyl tert butyl ether 200 _ 243 700-130 122 250 678 <br /> Surrogate aa a-Trifluorotoluene 200 236 600-140 118 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 6 <br /> �r <br />