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Sequoia 819 Avenue, 8 <br /> ID— Sacramento, <br /> 958mento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> CON/Pinnacle-Sacramento Project ARCO 2168,Stockton,CA Sampled 8/18/99 <br /> I <br /> 3 N Ma wet Blvd Project Number 792229 Received 8119/99 <br /> ramento,CA 95834 Project Manager Dave Foley Reported 9/2/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFr/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. 9490196 Date Pr pars'd. 8124199 Extraction Method. EPA 5030B(P/T) <br /> Elan 9080196-BLKI <br /> Purgeable Hydrocarbons 8/24/99 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 tert-butyl ether ND 500 <br /> Surrogate a a,a-Trrfluorotoluene 100 898 600-140 898 <br /> LIC 9080196-BSI <br /> Benzene 8/24/99 100 8 88 ug/l 700-130 88 8 <br /> Toluene 100 890 700-130 890 <br /> Ethylbenzene 10 0 893 700-130 893 <br /> Xylenes(total) 300 270 700-130 900 <br /> Methyl tert-butyl ether 100 105 700-130 l05 <br /> Surrogate a a,a-Trifluorotoluene 100 949 600-140 949 <br /> 41�� <br /> 4080196-MSI 5908228-01 <br /> Benzene 8/24199 100 1 78 108 ug/l 600-140 902 <br /> Toluene 100 ND 888 600-140 888 <br /> Ethylbenzene 100 ND 9 50 600-140 95 0 <br /> Xylenes(total) 300 0 961 282 600-140 908 <br /> Methyl tert-butyl ether 100 ND 9 75 600-140 975 <br /> Surrogate a,a,a-Trifluorotoluene 100 917 600-140 91 7 <br /> Matrix,,pike Duo 9080196-MSD1 S908228-01 <br /> Benzene 8/24/99 100 178 10 4 ug/l 600-140 862 250 4 54 <br /> Toluene " 100 ND 879 600-140 879 25 0 102 <br /> Ethylbenzene It <br /> 100 ND 942 600-140 942 250 0 846 <br /> Xylenes(total) 300 0 961 28 1 " 600-140 905 250 0 331 <br /> Methyl tert-butyl ether 100 ND 13 0 It <br /> 600-140 130 250 28 6 2 <br /> Surrogate a,a a-Tr ftuorotoluene 100 896 if 600-140 89 6 <br /> Batch, 9080210 Date Prepared, 8(2&99 Extraction Method, EPA 5030B(PITT <br /> Blank 9080210-BLK I <br /> Purgeable Hydrocarbons 8/25/99 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 500 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text of notes and definitions <br /> Page 6 of 9 <br />