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j Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX (916)921-0100 <br /> 1 <br /> EMCON-Sac Project ARCO 2130,Stockton,CA Sampled 6/4/99 to 6/6/99 <br /> 1433 N Market Blvd Project Number 21775-229 004 Received 6/7/99 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 6/27/99 <br /> Total Purgeable Hydrocarbons(C6-Cl2), 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 /> Batch, 9060182 Date Prepared. 6/17199 Extraction Method, EPA 5030B(P/T1 <br /> Blank 9060 W-BLKI <br /> Purgeable Hydrocarbons 6/17/99 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 /> Surrogate a a a-Trifluorotoluene 10 0 837 600-140 83 7 <br /> LSA 9060182-BSI <br /> Benzene 6/17/99 100 861 ug/l 700-130 86 1 <br /> Toluene 100 877 700-130 877 <br /> Ethylbenzene 100 884 700-130 88 4 <br /> Ones(total) " 300 270 700-130 900 <br /> yl tert-butyl ether _ 100 11 5 700-130 115 <br /> Surrogate a a a-Tri luorotoluene 100 834 600-140 834 <br /> Matrix Spike 9060182-MS1 590613403 <br /> Benzene 6117/99 100 ND 964 ug/l 600-140 964 <br /> Toluene 100 ND 9 81 600-140 981 <br /> Ethylbenzene 100 ND 100 600-140 100 <br /> Xylenes(total) 300 ND 297 600-140 990 <br /> Methyl tert-butyl ether 100 ND 166 600-140 166 5 <br /> Surrogate a a a-Trifluorotoluene 100 9 68 600-140 968 <br /> Matrix Spike Dun 9060182-MSD1 5906134-03 <br /> Benzene 6117/99 10 0 ND 9 86 ug/l 600-140 98 6 250 2 26 <br /> Toluene 100 ND 998 600-140 998 250 172 <br /> Ethylbenzene 100 ND 104 600-140 104 250 3 92 <br /> Xylenes(total) 300 ND 302 600-140 101 250 2 00 <br /> Methyl tert-butyl ether 100 ND 120 600-140 120 250 322 6 <br /> Surrogate a a a-Tnfluorotoluene 100 100 600-140 100 <br /> Batch, 9060183 Date Prepared. 6/18/99 Extraction Method EPA 5030B(P/T) <br /> Blank 9060183 DLKi <br /> Purgeable Hydrocarbons 6/18/99 ND ug/l Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> l tent-butyl ether ND 5 00 <br /> y 0 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text of notes and definitions <br /> Page 6 of l I <br /> rs n <br />