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Sequoia 819 Avenue, S 4 <br /> Sacramento CA 95858 34 <br /> 4 i!D (916)921-9600 <br /> Analytical FAX (916)921-0 100 <br /> wr <br /> SECOR International- Sacramento Protect ARCO 2093,Tracy,CA Sampled 2116100 <br /> 9912 Business Park Dr,Ste 100 Project Number 077 41928 190 Received 2/18/00 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/6/00 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE in Air(ppmv) 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 0020183 Date Prepared 2118/00 Extraction Method EPA 5030B P/T <br /> Blank 0020183-B LK 1 <br /> Purgeable Hydrocarbons 2/18/00 ND ppmv 280 <br /> Benzene ND 00160 <br /> Toluene ND 00130 <br /> Ethylbenzene ND 00120 <br /> Xylenes(total) ND 00120 <br /> M_ethyl tert-butyl ether _ ND _ 0 140 _ f <br /> Surrogate a a a-TriJluorotoluene _ 0 00200 0 00135 60 0-140 67 5 <br /> • *Refer to end ofreport for test of notes and definitions <br /> Sequoia Analytical-Sacramento <br /> Page 6ot8 <br />