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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> tx� (9]b)922 l-9600 <br /> FAX(916)921-0100 <br /> IVAnalytical www sequoialabs corn <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA Sampled 9/29/00 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Received 1015100 <br /> Rancho Cordova, CA 95670 Project Manager Rusty Benkosky Reported 10/16/00 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE 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 /> Blank(continued) _ 0100146-BLK1 <br /> Surrogate a a a-Trnfluorotoluene 10/13/00 100 103 u9/1 600-140 103 <br /> LCS 0100146-BSI <br /> Benzene 10/13/00 100 108 ug/i 700-130 108 <br /> Toluene 100 105 700-130 105 <br /> Ethylbenzene 100 109 700-130 109 <br /> Xylenes(total) 300 324 700-130 108 <br /> Methyl tert-butyl ether 100 103 700-130 103---- <br /> Surrogate <br /> 03 --_Surrogate a a a-Tris luorotoluene 100 104 600-140 104 <br /> Matrix Spike 0100146-MSI S010094-01 <br /> Benzene 10/13/00 10 0 ND 108 ug/l 600-140 I08 <br /> T10 0 ND 108 600-140 108 <br /> E ' zene 10 0 ND 11 1 600-140 111 <br /> Xylenes(total) 30 0 ND 328 600-140 109 <br /> Methyl tent-butyl ether 10 0 ND 8 14 600-140 814 <br /> Surrogate a a a-Trrfluorotoluene 100 101 600-140 101 <br /> Matrix Spike Dun 0100146-MSDI 5010094-01 <br /> Benzene 10/13/00 10 0 ND 113 ug/l 600-140 113 250 452 <br /> Toluene 100 ND 112 600-140 112 25 0 364 <br /> Ethylbenzene 100 ND 11 3 600-140 113 250 179 <br /> Xylenes(total) 300 ND 340 600-140 113 250 360 <br /> Methyl tert-butyl ether 100 _ ND---- 116 T 600-140 116 250 351 —2 <br /> Surrogate a a a-Trifluorotoluene 100 992 600-140 992 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 6 of 7 <br />