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Sequoia 819 Sinker Avenue Sulte 8 <br /> 958 <br /> Sacramento CA 95834 <br /> 4 41� (916)921-9600 <br /> FAX(916)921-0 100 <br /> soAnalytical www sequolalabs com <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA Sampled 7127100 <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Received 7/28/00 <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky Reported 8/7/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE in Air(ppmv) 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 /> Batch 0080020 Date Prepared 7/31/00 Extraction Method EPA 5030B P/T <br /> Blank 0080020-BLK 1 <br /> Purgeable Hydrocarbons 7/31/00 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) ND 00120 <br /> Methyl ten-butyl ether ND 0 140 _ <br /> Surrogate a a a-Trifluorotoluene 000200 000208 600-140 104 <br /> 0 <br /> Sequoia Analytical-Sacramento 'Refer to end ofreportfor text ofnotes and definitions <br /> Page 6 of 8 <br />