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4DFAX <br /> 819 Striker Avenue Suite 8 <br /> S£ uoi Sacramento )9 95834 <br /> q (9l6)92i 9600 <br /> Analytical• (916)921-0100 <br /> tical www sequolalabs corn <br /> } Project Tosco 6981,Stockton,CA i <br /> ettler-Ryan-Rancho Cordova <br /> 3140 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Dave Vossler 04/30/02 14 02 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Batch 2040321 -EPA 5030B PIT <br /> Blank(2040321-BLKI) Prepared&Analyzed 04/25/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a Trii luorotoluene 954 100 954 60-140 <br /> LCS(2040321-BSI) Prepared&Analyzed 04/25/02 <br /> Benzene 109 050 ug/1 100 109 70-130 <br /> Toluene 11 1 050 100 ill 70-130 <br /> Ethylbenzene 10 8 050 100 108 70-130 <br /> Xylenes(total) 33 5 050 30 0 112 70-130 <br /> l tbyl tert-butyl ether 120 25 100 120 70-130 <br /> _ourrogate a aa-Trtfluoratoluene 100 100 100 60-140 <br /> LCS Dup(2040321-BSDI) Prepared&Analyzed 04/25/02 <br /> Benzene 106 050 ug/l 100 106 70-130 2 79 25 <br /> Toluene 10 5 050 100 105 70-130 556 25 <br /> Ethylbenzene 103 050 100 103 70-130 474 25 <br /> Xylenes(total) 314 050 300 105 70-130 641 25 <br /> Methyl tert-butyl ether 102 25 100 102 70-130 162 25 <br /> Surrogate a a a-Trifluorotoluene 101 100 101 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain o1 <br /> custody document This analytical report roust be reproduced in its ennrety <br /> Page Page 3 of 4 <br />