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b <br /> Sequoia 819Striker ue Suite 8 <br /> Sacramento CA 95834 <br /> 4 (916)921-9600 <br /> Analytical FAX(916)92 1-0 100 <br /> 0 <br /> SECOR International-Sacramento Project ARCO 2093,Tracy,CA Sampled 1/26/00 <br />)912 Business Park Dr,Ste 100 Project Number N/A Received 1127100 <br /> Sacramento,CA 95827 Project Manager Rus Benkosky Reported 218100 <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0020028 Date Prepared 1/28100 Extraction Method EPA 5030B(P/T) <br /> Blank 0020028-BLKI <br /> Purgeable Hydrocarbons 1128100 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 <br /> _Surrogate a a,a-Trifluorotoluene 000200 000191 600-140 955 mm <br /> Sequoia Analytical-Sacramento *Refer to end of report for test of notes and definitions <br /> Page 5 of 6 <br />