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,�DSequoia 819 Striker Avenue,Suite 8 <br /> i Sacramento,CA 95834 <br /> qW Analytical (916)921.9600 <br /> FAX(916)921-0100 <br /> www.sequoialabs.com <br /> ' Delta Environmental ConsultantS(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: N/A <br /> Cameron Park CA,95682Reported: <br /> Project Manager. Jay Johnson 09/21/01 15:50 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-San Carlos <br /> __�: Reporting Spike Source %REC :RPD <br /> Analyte Result Limit Units a <br /> Level Result /oREC Limits RPD mit Notes <br /> Batch 1090053-EPA 5030E [P/TJ <br /> Blank(1090053-BLK1) Prepared&Analyzed:09/14/01 <br /> Ethanol ND 50 mg/kg <br /> 1,2-Dibromoethane ND 0.10 <br /> 1,2-Dichloroethane ND 0.10 " <br /> Di-isopropyl ether ND 0.10 <br /> Ethyl tert-butyl ether ND 0.10 " <br /> Methyl tert-butyl ether ND 0.10 „ <br /> Tert-amyl methyl ether ND 0.10 " <br /> Tert-butyl alcohol ND 5.0 " <br /> Surrogate:1,2-Dichloroethane-d4 2.46 „ <br /> 2.50 98.4 70-121 <br /> Surrogate: Toluene-d8 2.46 I, <br /> 1.54 98.4 81-I17 <br /> LCS(1090053-BSI) Pre ared&Anal zed:09114/OI <br /> Methyl tert-butyl ether 2.34 <br /> 0.10 mg/[cg 2.50 93.6 70-130 <br /> urrogate:1,2-Dichloroethane-d4 2.35 <br /> %%wSurrogate: 1 <br /> Toluene-d8 2.50 94.8 70-121 <br /> .37 2.50 94.8 81-117 <br /> Matrix Spike 1090053-MSI Source:L109066-01 Prepared&Anal zed:09/14/01 <br /> Methyltert-butylether 2.33 0.10 mg/kg 2.50 <br /> g g ND 93.2 60-140 <br /> Surrogate: 1,2-Dichloroethane-d4 2,25 „ <br /> 2.50 90.0 70-121 <br /> Surrogate: Toluene-d8 2,36 IF <br /> 2.50 94.4 81-117 <br /> Matrix Spike Du 1090053-MSDi Source:L109066-01 Prepared&Analyzed:09/14/01 <br /> Methyl tert-butyl ether 2.26 0.10 mg/kg 2.50 ND 90.4 60-140 3.05 25 <br /> Surrogate: 1,2-Dichloroethane-d4 2.08 2.50 <br /> Surrogate: Toluene-d8 8.3.2 7D-121 <br /> 1.15 2.50 86.0 81-1I7 <br /> Batch 1090062-EPA 5030B[PIT] <br /> Blank(1090062-BLK1) Pre ared&Anal zed:09/I7/01 <br /> Ethanol ND 50 mg/kg <br /> 1,2-Dibromoethane ND 010 „ <br /> 1,2-Dichloroethane ND 0.10 " <br /> Di-isopropyl ether ND 0.10 " <br /> Ethyl tert-butyl ether ND 0.10 „ <br /> Methyl Cert-butyl ether ND 0.10 " <br /> Tert-amyl methyl ether ND 0.10 „ <br /> Tert-butyl alcohol ND 5.0 " <br /> Surrogate:1,2-Dichloroethane-d4 2.38 2.50 <br /> 95.1 70-121 <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 /> Page Page 21 of 24 <br />