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819 Sinker Ave Ste B <br /> Sacramento, A 95834 <br /> Sequoia (916)921-9600 <br /> ,T� <br /> 100 <br /> - y FAX(916)921s com <br /> Analytical .vyvvst<liu>ialabscom <br /> *-J <br /> Ryan-Dublin Project TOSCO 11192,Stockton,CA S211573 <br /> erra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L /larding 12/06/02 15 34 <br /> Casoline\BTEXIOxygenates by EPA method 8260B- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110445-EPA 5030BJP/TJ <br />(Blank(2110445-BLK1) Prepared 11/27/02 Analyzed 11/28/02 <br /> Benzene ND 050 ugA <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl Cert-butyl ether ND 2 0 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 268 <br /> " 25 0 107 60-140 <br /> Surrogate 4-BFB ' 294 " 250 118 60-140 <br /> Laborato Control Sample(2110445-BSI) Prepared 11/27/02 Analyzed 11/28/02 <br /> Benzene 328 050 ug/i 335 98 70-130 <br /> *tem-butyl <br /> 15 6 050 202 77 70-130 <br /> ether 4 61 2 0 545 85 60-140 <br /> Gasoline(C6-C10) 351 50 275 128 70-130 <br /> Surrogate Toluene-d8 <br /> 267 250 107 60-140 <br /> Surrogate 4-BFB 290 " 250 116 60-140 <br /> Matrix Spike(2110445-MSI) Source S211573-04 Prepared 11/27/02 Analyzed 11/28/02 <br /> Benzene 366 050 ug/1 335 ND 109 70-130 <br /> Toluene 176 050 202 0 67 84 70-130 <br /> Methyl tert-butyl ether 160 2 0 545 150 183 60-140 QM-4X <br /> Gasoline(C6-C10) 272 50 275 150 44 60-140 QM-07 <br /> Surrogate Toluene-d8 263 250 105 60-140 <br /> Surrogate 4-BFB 303 15 0 121 60-140 <br /> Matrix Spike Du (2110445-MSDI) Source 5211573-04 Prepared 11/27/02 Analyzed 11/28/02 <br /> Benzene 3 73 050 ugA 335 ND 111 70-130 2 25 <br /> Toluene 180 0 50 202 067 86 70-130 2 25 <br /> Methyl tert-butyl ether 167 2 0 545 150 312 60-140 4 25 QM4X <br /> Gasoline(C6-C10) 284 50 275 150 49 60-140 4 25 QM-07 <br /> Surrogate Toluene-d8 270 25 0 108 60440 <br /> oia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 16 <br />