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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento 9 <br /> (916)921-96M <br /> FAX(916)921 <br /> Analytical <br /> www sequolalabs bs com coin <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA Sampled 9/29100 <br /> 3017 Kilgore Road,Suite t00 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 LUFI'/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 0100145 Date Prepared _10113100 Extraction Method EPA 5030B_JMe01U <br /> Blank 0100145-B LKI <br /> Purgeable Hydrocarbons 10/16/00 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether _ " ND 250 <br /> Surrogate a a a-Trrfluorotoluene 100 946 600-140 946 <br /> LCS 0100145-BS 1 <br /> Benzene 10/16/00 100 11 2 ug/1 700-130 112 <br /> Toluene 100 108 700-130 108 <br /> Et�zene 100 108 700-130 108 <br /> Xy (total) 300 322 700-130 107 <br /> Methyl tert-butyl ether 100 114 700-130 114 <br /> Surrogate a a a-Trrfluorotoluene 100 993 600-140 993 <br /> Matrix Spike 0100145-MSI S010028-01 <br /> Benzene 10/16/00 100 ND 106 ug/1 600-140 106 <br /> Toluene 100 ND 106 600-140 106 <br /> Ethylbenzene 10 0 ND 106 600-140 106 <br /> Xylenes(total) 300 ND 32 1 600-140 107 <br /> Methyl tent-butyl ether_ _ 100 ND _ 10 5 600-140 105 <br /> Surrogate a,a a-Trifluorotoluene 100 9 31 600-140 931 <br /> Matrix_Spike Dun 0100145-MSDI 5010028-01 <br /> Benzene 10/16/00 100 ND 10 7 ug/I 600-140 107 250 0 939 <br /> Toluene 100 M7 106 600-140 106 25 0 0 <br /> Ethylbenzene 100 ND 10 6 600-140 106 250 0 <br /> Xylenes(total) 300 ND 322 600-140 107 25 0 0 <br /> Methyl tert-bury_I ether 10 0 _ _ND 14 1 600-140 _141_ _25 0_ 293 2_ <br /> Surrogate a a a-Trrfluorotoluene <br /> 100 938 600-140 938 <br /> Batch 0100146 Date Prepared 10/13/00 Extraction Method EPA 5030E(MeOH) <br /> Blank 0100146-BLK1 <br /> Purgeable Hydrocarbons 10/13/00 ND ug/1 Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> VX (total) ND " 0 500 <br /> tert-butyl ether ND 250 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 7 <br />