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Sequoia 819 Stoker Avenue Suite 8 <br /> 1 Sacramento CR 95834 <br /> (916)921-9600 <br /> Analytical FAX 921-0 100 <br /> www sequequolalabs corn <br /> SECOR International-Rancho Cordova Project ARCO 2133, Stockton CA Sampled 9/27100 <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Received 9/27100 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 10/2100 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE to Air(ppmv) by DEIS LUFT/Quality Control <br /> Sequoia Analytical- Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyle Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0090331 Date Prepared_ 9/29100 Extraction Method EPA 5030B(MeOH) <br /> Blank 0090331-BLK1 <br /> Purgeable Hydrocarbons 9/29/00 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 0 140 <br /> Surrogate a a a-Trifluorotoluene 000200 000224 600-140 112 <br /> 0 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for test ofnotes and definatons <br /> Page 5 of 6 <br /> rP9� <br />