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v i � <br /> ti 819 Striker Avenue,Suile' 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> L333OCameron <br /> www.sequoialabs.com <br /> 4 <br /> onmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> Park Dr.Ste 550 Project Number: N/A Reported: <br /> rk CA,95682 Project Manager: Jay Johnson 09/20/01 14:36 <br /> � l <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B-Quality Control <br /> 'f Sequoia Analytical- San Carlos j <br /> Reporting Spike Source %REC RPD Ll <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes� IE <br /> s <br /> Batch 1090062-EPA 5030B IP/Tl 4 <br /> LCS(1090062-BS2) Prepared&Analyzed:09/18/01 <br /> Methyl tert-butyl ether 2.52 0.10 mg/kg 2.50 101 70-130 <br /> Surrogate:l,2-Dichloroethane-d4 2.55 . 2.50 102 70-121 F <br /> Surrogate: Toluene-d8 2.56 2.50 102 81-117 <br /> Matrix Spike(1090062_MS1) Source:L109069-06 Prepared&Analyzed:09/17/01 f <br /> Methyl tert-butyl ether 2.55 0.10 mg/kg 2.50 ND 102 60-140 I <br /> Surrogate:l,2-Dichloroethane-d4 1.38 2.50 95.1 70-121 <br /> Surrogate: Toluene-d8 2.40 1.50 96.0 81-117 1 <br /> Matrix Spike Dup(1090062-MSDI) Source:L109069-06 Prepared&Analyzed:09/17/01 F <br />' Methyl tert-butyl ether 2.36 0.10 mg/kg 2.50 ND 94.4 60-140 7.74 25 I <br /> + <br /> Surrogate:l,2-Dichloroethane-d4 2.24 2.50 89.6 70-121 h I <br /> Surrogate: Toluene-d8 2.43 2,50 97.2 81-117 <br /> i <br /> i. <br /> ',l I <br /> i <br /> i <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> i of custody document. This analytical report must he reproduced in its entirety. <br /> Ir <br /> k <br /> I <br /> Page Page 8 of 9 <br /> i <br />