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Suite <br /> Sequoia 819 Striker Avenue 958 8 <br /> Sacramento CA 95834 <br /> 4(D <br /> (916)921-9600 <br /> FAX(916)921-0 100 <br /> VAnalytical www sequoialabs com <br /> SECOR International-Rancho Cordova Project ARCO 2093, Tracy,CA Sampled 10/23/00 <br /> 3017 Kilgore Road Suite 100 Projee t Number N/A Received 10/24/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 11/8100 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE in Air 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 0100322 Date Prepared 10/25/00 Extraction Method EPA 5030E(PIT) <br /> Blank 0100322-BLKI <br /> Purgeable Hydrocarbons 10/25/00 ND mg/m'Air 100 <br /> Benzene " ND 00500 <br /> Toluene IF ND 00500 <br /> Ethylbenzene IF ND 00500 <br /> Xylenes(total) ND 00500 <br /> Methyl tert-butyl ether _ _ _ _ ND _ 0 500 <br /> Surrogate a a a-Trifluorotoluene 200 230 600-140 115 <br /> LCS 0100322-BSI <br /> Benzene 10/25/00 200 2 13 mg/m'Air 700-130 107 <br /> Toluene 200 225 700-130 113 <br /> Ethylbenzene 200 2 19 700-130 110 <br /> Wye, <br /> s(total) 600 620 700-130 103 <br /> tert_butyl ether _ 200 __2 29 700-130 _114 <br /> Surrogate a a a-Trtfluorotoluene 2 00 234 600-140 117 <br /> LCS Due 0100322-BSDI <br /> Benzene 10/25/00 200 2 19 mglm'Air 700-130 110 250 276 <br /> Toluene 2 00 2 28 " 700-130 114 25 0 0 881 <br /> Ethylbenzene " 200 2 24 700-130 112 25 0 180 <br /> Xylenes(total) 600 6 30 700-130 105 250 1 92 <br /> Methyl Cert-butyl ether 200 243 _ 700-130 122 250 678 <br /> Surrogate aaa-Trifluorotoluene 200 236 600-140 118 <br /> Sequoia Analytical- Sacrmncnto *Refer to end of report for text of notes and definitions <br /> Page- 5 of 8 <br />