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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> (916)9Z2 t-9600 <br /> FAX(916)9Z 1 <br /> �� <br /> Analytical vUoialabs`om <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy CA Sampled 8128/00 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 8/29/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 9118/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE to Air 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 0080366 Date Prepared 8/31100 Extraction Method EPA 5030B PIT <br /> Blank 0080366-BLK I <br /> Purgeable Hydrocarbons 8/31100 ND mg/ml Air 100 <br /> Benzene ND 00500 <br /> Toluene ND 00500 <br /> Ethylbenzene ND 00500 <br /> Xylenes(total) ND 00500 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate a a a-Trifluorotoluene 200 198 600-140 99 0 <br /> LCS 0080366-BSI <br /> Benzene 8/31/00 2 00 1 95 mg/ml Air 700-130 975 <br /> To e " 200 191 700-130 955 <br /> E nzene 2 00 1 85 70 0-130 92 5 <br /> Xy es(total) <br /> 600 507 700-130 84 5 <br /> Methyl tert-butyl ether 200 228 700-130 114 <br /> Surrogate a,a,a-Trafluorotoluene 200 209 600-140 104 <br /> LCS Dup 0080366-BSD1 <br /> Benzene 8/31/00 200 1 9t mglm'Air 700-130 95 5 25 0 2 07 <br /> Toluene 200 1 89 700-130 945 250 105 <br /> Ethylbenzene 200 1 81 700-130 905 250 2 19 <br /> Xylenes(total) 600 496 700-130 827 250 2 15 <br /> Methyl tert-butyl ether 2 00 237 700-130 118 250 345 <br /> Surrogate a,a,a-Trifluorotoluene 2 00 206 600-140 103 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and def nations <br /> page 5 of 8 <br />