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� a <br /> Sequoia 819 Striker Avenue Suite 8 <br /> I!D <br /> Sacramento CA 95834 <br /> Analytical (916) 921-9600 <br /> FAX(916)92]-0100 <br /> Sff <br /> SECOR International-Sacramento Project ARCO 2093,Tracy,CA Sampled 2/29/00 <br /> 9912 Business Park Dr, Ste 100 Project Number N/A Received 3/l/00 <br /> Sacramento,CA 95827 Project Manager Rusty Renkosky Reported 3/10/00 <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 /> Ana[ to Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS(continued) 0030086-BSI <br /> Methyl tert--butyl ether 318/00 _ 10 0 997 _ ug/l 700-130 99 7 <br /> Surrogate a a,a-Trifluorotoluene 100 102 600-140 102 <br /> Matrix Spike 0030086-MS] 5003024-09 <br /> Benzene 318/00 100 ND 9 74 ug/l 600-140 974 <br /> Toluene too ND 9 69 600-140 969 <br /> Ethylbenzene too ND 9 76 600-140 976 <br /> Xylenes(total) 300 ND 294 600-140 980 <br /> Methyl tert-butyl ether_ _ _"_ 100 ND 102 _ 60 0_-140 102 <br /> Surrogate a a a-Trifluorotoluene 100 9 94 600-140 994 <br /> Matrix Spike Dun 0030086-MSDI 5003024-09 <br /> Be ne 3/8/00 10 0 ND 101 ug/l 600-140 101 250 363 <br /> Te 10 0 ND 100 600-140 100 25 0 3 15 <br /> E eon <br /> 100 ND 101 600-140 101 25 0 342 <br /> Xylenes(total) 300 ND 30 1 600-140 100 25 0 202 <br /> Methyl tert-butyl ether_ 100 ND 883 600-140 _ 88 3 250 14 4 <br /> Surrogate a a a-Trifluorotoluene 100 9 74 600-140 97 4 <br /> Batch 0030088 Date Prepared 3/8/00 Extraction Method EPA 5030E(MeOH) <br /> Blank 0030088-BLKI <br /> Purgeable Hydrocarbons 3/8100 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-_butyl ether_ _ ND_ _ 2 50 <br /> Surrogate a a a-Trefluorotoluene _ 100 10 7 600-140 107 <br /> LCS 0030088-BSI <br /> Benzene 318100 10 0 101 ug/l 700-130 101 <br /> Toluene 100 100 700-130 100 <br /> Ethylbenzene 100 103 700-130 103 <br /> Xylenes(total) 300 307 700-130 102 <br /> Methyl tert-butyl ether__ _ to 0 ___ 10 6 _ 700-130 106 <br /> Surrogate a a a-Trrfluorotoluene 100 108 600-140 108 <br /> Matrix Spike 0030088-MSI 5003031-06 <br /> Benzene 3/8/00 100 ND 104 ug/l 600-140 104 <br /> Toluene 100 ND 103 600-140 103 <br /> E&nzene " 100 ND 105 600-140 105 <br /> Sequoia Analytical-Sacramento *Refer to end of report jar text of notes and definitions <br /> i <br /> Page 7 of 9 <br />