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f <br /> s I <br /> • - f <br /> 819 Striker Avenue,Suite 8 <br /> Sequoia' <br /> 1 Sacramento, <br /> 921-9600 <br /> Analytical 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 Reported: <br /> Cameron Park CA,95682i. <br /> ' Project Manager: Jay Johnson 09/24/01 17:12 <br /> VoIatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte b Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1I20011-EPA 50308(MeOH) <br /> 1. <br /> I Blank(1I20011-BLK1)" Prepared&Analyzed:09/20/01 <br /> l+ Ethanol ND 25 mg/kg., <br /> i tert-Butyl alcohol ND 2.5 <br /> Methyl Cert-butyl ether(MTBE) ND 0.10 <br /> Di-isopropyl ether ND 0.10 " <br /> Ethyl tert-butyl ether I NTD 0,10 " <br /> 1,2-Dichloroethane i ND 0.10 " <br /> j tert-Amyl methyl ether j ND 0.10 " <br /> f1 1,2-Dibromoethane F ISTD 0.10 " <br /> Surrogate:Dibromofluoromethane 2.59 11 1.50 104 50-150 <br /> Surrogate:1.1-Dichloroethane-d4 2.69 ol 2.50 108 50-150 <br /> 1 i <br /> LCS 1120011-BSI) Prepared&Analyzed:09/20/01 <br /> _ Methyl tert-butyl ether(MTBE) 2.55 0.10mglkg 2.50 102 70-130 <br /> IC; <br /> + urrogate:Dibromofluoromethane 2.56 " 2.50 102 50-150 <br /> Surrogate: l,2-Dichloroethane-d4 2.56 " 2.50 102 50-150 <br /> Matrix S ike1120011-M51 Source:S109124-06 Prepared:09/20/01 Anal zed:09/21/01 <br /> t Methyl tert-butyl ether(MTBE) 2.84 0.10 mg/kg 2.50 ND 114 60-140 <br /> Surrogate:Dibromofluoromethane 2.8Z 2.50 113 50-150 <br /> Surrogate:1,2-Dichloroethane-d4 2.75 2.50 110 50-150 <br /> Matrix Spike Du (1120011-MSD1) Source:5109124-06 Prepared:09/20/01 Analyzed:09/21/01 <br /> Methyl tert-butyl ether(MTBE) 2.73 0.10 mg/kg 2.50 ND 109 60-140 3.95 25 <br /> Surrogate:Dibromofluoromethane 2.72 1 2.50 109 50-150 <br /> Surrogate:1,2-Dichloroetha4-d4 2.76 11 2.50 110 50-150 <br /> 1 <br /> i= <br /> 1 � <br /> ffa <br /> 1 4s <br /> �.kkk '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 /> 1 <br /> i <br /> I Page Page 8 of 9 <br />