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Strik <br /> Aven <br /> e Suite 8 <br /> Sequoia 819 <br /> gSac aem nto "CA 95834 <br /> 4 (916) 921-9600 <br /> a- ) Analytical FAX(916)921-0100 <br /> EMCON/Pinnacle-Sacramento Project ARCO 2130,Stockton,CA Sampled 912/99 <br /> 1433 N Market Blvd Project Number 21775-229 003 Received 913199 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 9/20/99 <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 /> Batch, 9090078 Date Prepared. 919199 FYtrart,nn Metbnd. EPA 503013(PIT <br /> Blan 9090078-BLKI <br /> Purgeable Hydrocarbons 919199 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 /> Methyl text-butyl ether ND Soo <br /> Surrogate a,a a-Tr fluorotoluene 100 101 600-140 101 <br /> LCS X090078-BSi <br /> Benzene 9/9199 100 9 12 ug/l 700-130 91 2 <br /> Toluene 100 9 19 700-130 91 9 <br /> Ethylbenzene 10 0 9 28 700-130 928 <br /> Xlenes(total) 300 278 700-130 927 <br /> 1 tert-butyl ether 100 934 700-130 93 4 <br /> ogate a,a,a-Trifluorotoluene 100 103 600-140 103 <br /> Matrix Spike 9090078-MSI S909057-02 <br /> Benzene 9/9/99 10 0 ND 8 94 ug/1 600-140 894 <br /> Toluene 100 ND 9 15 600-140 91 5 <br /> Ethylbenzene 100 ND 9 11 600-140 91 1 <br /> Xylenes(total) 300 ND 277 600-140 923 <br /> Methyl tent-butyl ether 100 ND 108 600-140 108 <br /> Surrogate a,a a-Tr fluorotoluene 100 9 60 600-140 96 0 <br /> Matrix Spike Dun 9090078-MSD/ 5909057-OZ <br /> Benzene 9/9199 100 ND 9 05 ugll 600-140 905 25 0 122 <br /> Toluene 100 ND 9 27 600-140 927 250 130 <br /> Ethylbenzene 100 ND 929 600-140 929 25 0 196 <br /> Xylenes(total) " 300 ND 283 it 600-140 943 25 0 214 <br /> Methyl tert-butyl ether 100 ND 110 600-140 110 250 183 <br /> Surrogate a,a,a-Trifluorotoluene 100 9 73 600-140 973 <br /> Batch, 9090086 Date Prepared, 919199 Extraction Method, EPA 5030B 01) <br /> Blank 9090086-BLKI <br /> Purgeable Hydrocarbons 919199 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 tent-butyl ether ND 500 <br /> oia Analytical-Sacramento *Refer to end ofreport for text ofnotes and definitions <br /> Page 6 of 12 <br />