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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento c 95834 <br /> Ci) (9 16)922 1-9600 <br /> www FAX(916)92 1-0100 <br /> sequoialabs com <br /> SECOR International-Rancho Cordova Project ARCO 2133, Stockton,CA Sampled 10/23/00 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Received 10/24/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported H/1100 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE to Air(ppmv) by DHS LUF'T/Quality Control <br /> Sequoia Analytical- Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Rc sult Result Units Recov Limits % Limit % Notes* <br /> Batch 0100322 Date Prepared 10/25/00 Extraction Method EPA 5030B(PIT) <br /> Blank 0100322-B L K l <br /> Purgeable Hydr"arbons 10/25/00 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) ND 00120 <br /> Methyl tert-butyl ether _ _ _ ND -0140 <br /> Surrogate a a a-Trifluorotoluene 000260 000230 660-140 115 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text ofnotes and definitions <br /> p Page 5 of 6 <br />