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tii a <br /> 819 Striker Avenue,Suite 8 <br /> SQqIIOIa Sacramento )9 95834 <br /> (916)921-9600 <br /> Analytical FAX seq 6)921-c <br /> www sequoualabs core <br /> SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Protect Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/14/02 11 28 <br /> BTEX by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linnt Units Level Result %REC Linuts RPD Limit Notes <br /> Batch 2060151-EPA 5030B[P/TJ <br /> Blank(2060151-BLKI) Prepared 06/13/02 Analyzed 06/14/02 <br /> Ethanol ND 50 ug/l <br /> Tert-butyl alcohol ND so " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-tsopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-arnyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Ethyibenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> asolme(C6-C 10) ND 50 " <br /> 'W§urrogate Toluene-d8 2.52 250 101 60-140 <br /> Surrogate 4-BFB 318 250 127 60-140 <br /> Surrogate 1 1-DCA-d4 290 250 116 60-140 <br /> LCS(2060151-BS1) Prepared 06/13/02 Analyzed 06/14/02 <br /> Methyl tent-butyl ether 520 050 ug/l 545 95 60-140 <br /> Benzene 325 050 3 35 97 70-130 <br /> Toluene 17 3 050 202 86 70-130 <br /> Gasoline(C6-C10) 223 50 275 81 70-130 <br /> Surrogate Toluene-d8 244 250 98 60-140 <br /> i <br /> Surrogate 4-BFB 312 250 125 60-140 <br /> Surrogate 1 2-DCA-d4 289 250 116 60-140 <br /> Matrix Spike(2060151-MSI) Source 5206079-15 Prepared 06/13/02 Analyzed 06/14/02 <br /> Methyl tert-butyl ether 5 50 050 ug/1 545 ND 101 60-140 <br /> Benzene 343 050 3 35 ND 102 70-130 <br /> Toluene 182 050 202 ND 90 70-130 <br /> Gasoline(C6-C10) 243 50 275 ND 88 60-140 <br /> Surrogate Toluene-d8 249 250 100 60-140 <br /> Surrogate 4-BFB 321 250 128 60-140 <br /> Surrogate 1 2-DCA-d4 294 250 118 60-140 <br /> 40 quoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thus analytical report must be reproduced in its entirety <br /> Page Page 10 of 12 <br />