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Sequoia 819 StAvenue, 8 <br /> Sequoia <br /> Sacramento, <br /> 958mento,CA 95834 . <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoialabs.com. <br /> Kleinfelder-Stockton Project: Del Monte 5304393 <br /> 2825 East Myrtle Street Project Number: 12280 Reported: <br /> Stockton CA,95205 Project Manager: Tony Martin 04/28/03 18:36 <br /> Gasoline\BTEXIOxygenates by EPA method 82608 - Quality Control <br /> ,Sequoia Analytical Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Unite Level Result %REC Limits RPD Limit Notes <br /> Batch 3040355-EPA 5030B (PIT] <br /> Blank(3040355-BLKI) Prepared&Analyzed:04/21/03 <br /> Ethanol ND 0.20 mg/kg <br /> Tert-butyl alcohol " ND 0.054 <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Di-isopropyl ether . ND. 0.0050 <br /> Ethyl tert-butyl ether ND 0.0050 <br /> Tert-amyl methyl ether ND 0,0050 " <br /> t,2-Dichloruethane ND 0.0050 " <br /> 1,2-Dibrnmoethane(EDB) ND 0.0050 " <br /> Benzene ND 0.0050 " <br /> Etliylben_zene ND 0.0050 " <br /> Tnluene ND 0.0050 " <br /> l les(total) ND 0.010 <br /> Gasoline(C6-C 10) ND 1.0 " <br /> Surrogate:1,2-DC.A-d4 0.0544 0.0500 109 60-140 <br /> Surrogate:Toluene-d8 0.0508 0.0500 102 60-140 <br /> Surrogate:4-BFB 0.0429 6.0500 86 60-140 <br /> Laboratory Control Sample(3040355-BSI) Prepared&Analyzed:04/21/03 _ <br /> Methyl Cert-butyl ether 0.0515 _ "0.0050 mglkg 0.0448 115 60-140 <br /> Benzene 0.0324 0.0050 0.0272 119 70-130 <br /> Toluene 0.155 0.0050 0.167 93 70-130 <br /> Gasoline(C6-C 10) 2.04 1.0 2.20 93 70-130 <br /> Surrogate:l,2-DC4-d4 0.0563 0.0500 113 60-140 <br /> Surrogate:Toluene-d8 0.0491 0.0500 98. 60-140 <br /> Surrogate.-4-BFB 0.0462 0.0500 92. 60-140 <br /> Matrix Spike(3040355-MSI) _ Source:5304393-01 Prepared&Analyzed: 04/21/03 <br /> Methyl tert-butyl ether 0.0490 0.0050 mg/kg 0,0448 ND 109 60-140 <br /> Benzene 0.0320 0.0050 . 0.0272 ND 118 60-140 <br /> Toluene 0.168 0.0050 0.167 ND 101 60-140 <br /> Gasoline(C6-C 10) 2.20 1.0 2.20 ND 100 60-140 <br /> Surrogate.:1,2-DCA-d4 0.0505 0.0500 101 60-140 <br /> Surrogate:Toluene-d8 0.0507 0.0500 101 60-140 <br /> Surrogate:4-BFB 0.0467 0.0500 93 60-140 <br /> ! aoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 5 of 7 <br />