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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA95834 <br /> 92 <br /> (916)921-9600 <br /> FAX92 1-0 100 <br /> Analytical wwwsequoialabs.com <br /> Geological Technics,Inc. Project:.Cardoza S405064 <br /> 1101 7th Street Project Number: 1135.2 Reported: <br /> Modesto CA,95354 Project Manager: Jenny Weese 06/15/04 15:19 <br /> Gasoline\BTEX\Oxygenates 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 4050328-EPA 5030B 1P/T1 <br /> Blank(4050328-BLK2) Prepared&Analyzed-,06/09/04 <br /> Tert-butyl alcohol ND 0.050 mg/kg <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 /> 1,2-Dichloroethane ND 0.0050 " <br /> 1 than <br /> b oe e(EDB)2-Di rom ND 0.0050 <br /> B) <br /> Benzene ND 0.0050 <br /> Ethylbenzene ND 0.0050 <br /> Toluene ND - 0.0050 <br /> Xylenes(total) ND 0.010 " <br /> Gasoline Range Organics(C4-C12) ND 1.0 <br /> Surrogate:1,2-DCA-d4 0.00859 0.0100 86 60-140 <br /> Surrogate:Toluene-d8 0.0107 0.0100 107 60-140 <br /> Surrogate:4-BFB - 0.00956 0.0100 96. 60-140 <br /> Laboratory Control Sample(4050328-BS1) Prepared&Analyzed:06/08/04 <br /> Methyl tert-butyl ether 0.0479 0.0050 mg/kg 0.0432 111 60-140 <br /> Benzene 0.0222 0.0050 0.0268 83 70-130 <br /> Toluene 0.127 0.0050 0.152 84 70-130 <br /> Gasoline Range Organics(C4-C12) 1.53 1,0 2.20 70 70-130 <br /> Surrogate:1,2-DCA-d4 0.0126 0.0100 126 60-140 <br /> Surrogate:Toluene-d8 0.00920 0.0100 92 60-140 <br /> Surrogate:4-BFB 0.0106 0.0100 106 60-140 <br /> Laboratory Control Sample(4050328-BS2) Prepared&Analyzed:06/09/04 <br /> Methyl tert-butyl ether 0.0344 . . 0.0050 mg/kg 0.0432 80 60-140 <br /> Benzene 0.0267 0.0050 0.0268 100 70-130 <br /> Toluene 0.1(i2 0.6050 0.152 107 70=130 <br /> r Gasoline Range Organics(C4-C12) 2.28 1.0 2.20 104 70-130 <br /> LSurrogate:1,2-DCA-d4 0.00796 0.0100 80 60-140 <br /> Surrogate:Toluene-d8 0.00969 0.0100 97 60-140 <br /> Surrogate:4-BFB 0.00984 0.0100 98. 60-140 <br /> Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance.with the chain o <br /> 1 i <br /> custody document. Unless otherwise stated,results are reported on a wel weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> I <br /> Page 17 of 19 <br />