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Sequoia <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> 4111111Z;AM Analytical (916)921-9600 <br /> FAX(916)921-0I00 <br /> www.sequoialabs.eom <br /> i <br /> Delta Environments]Consultants(Cameron Park) Project: Arco 6100,Tracy,CA 'r <br /> 3330 Cameron Park Dr,Ste 550 <br /> Project Number: N/A <br /> Cameron Park CA,95682 Project Manager. Jay Johnson Reported: <br /> 09/21/0115:50 'I <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control t I <br /> Sequoia Analytical-San Carlos <br /> F I <br /> J Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %uREC Limits RPD Limit Notes i1 <br /> Batch 1090062-EPA 5030B [PPT] <br /> Blank(1090062-BLKl) <br /> Prepared&Analyzed:09/17/01 <br /> Surrogate: Toluene-d8 2.55 mg/kg 2.50 102 81-117 I <br /> o Blank(1090062-BLK2) f <br /> Prepared&Analyzed:09/18/01 <br /> Ethanol ND 50 mg/kg <br />{ 1,2-Dibromoethane ND 0.10 I <br /> 1,2-Dichloroethane ND 010 <br /> Di-isopropyl ether ND 0.10 I <br /> Ethyl tert-butyl ether ND 0.10 <br />{ Methyl tert-butyl ether ND 0.10 " <br /> Tert-amyl methyl ether ND 0.10 k <br /> i <br /> Tert-butyl alcohol ND S.0 <br /> Surrogate:1,2-Dichloroethane-d4 2.48 1,50 99.2 70-121 ! <br /> Surrogate: ouene-d8 <br />' Tl2'66 1.50 106 81-117 <br /> s.CS(1090062-BS1 Prepared&Analyzed:09/17/01 <br /> -Methyl tent-butyl ether 2.38 0.10 mg/kg 2.50 95.2 70-130 l <br /> Surrogate:I,1-Dichloroethane-d4 2.46 112.50 98.4 70-121 <br /> Surrogate: Toluene-d8 1.58 2.50 103 81-117 k <br /> LCS 1090062-BS2 Prepared&Analyzed:09/18/01 <br /> J Methyl tert-butyl ether 2.52 0.10 mg/kg 2.50 101 70-130 <br /> I <br /> Surrogate:1,2-Dichloroethan - <br /> g e d4 2.55 2.50 102 70-121 t ? <br /> Surrogate:Toluene-0 2.56 2.50 102 81-117 E <br /> Matrix Spike 1090062-MSI) Source:S109118-06 Prepared&Analyzed:09/17/01 P <br /> Methyl tert-butyl ether 2.55 0.10 mg/kg 2.50 ND 102 60-140 ! <br /> r <br /> Surrogate:1,2-Dichloroethane-d4 <br /> 2.38 2.50 95.1 70-121 <br /> Surrogate: Toluene-d8 2.40 2.50 96.0 81-117 LL <br /> F <br /> I t <br /> I <br /> 1 i <br /> I <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain { <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> I <br /> ' I 1 ► <br /> Page Page 22 of 24 <br /> i <br />