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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> sFAX(9[ 921-0100 <br /> r3 y l wwwequouolaiabs.cam <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A [reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 07/03/01 10:27 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Analyte Reporting Spike Source %REC RPD <br /> Result Limit Units Leve] Result %REC Limits RPD Limit Notes <br /> Batch I060I0I -EPA 5030B [P/TI <br /> Blank(1060101-BLKI) Prepared:06/22/01 Analyzed:06/23/01 <br /> 1,2-Dibromoethane ND 2.0 ug/l <br /> 1,2-Dichloroethane ND 2.0 „ <br /> Di-isopropy[ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Tert-amyl methyl ether ND 2.0 <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate:l,2-Dichloroethane-d4 51.2 50.0 102 76-114 <br /> Surrogate:Toluene-d8 51.5 50.0 103 88-110 <br /> Blank(1060101-BLK2) Prepared&Analyzed:06/24/01 <br /> ibromoethane ND 2.0 ug/l �- <br /> ichloroethane ND 2,0 „ <br /> Di-isopropyl ether ND 2.0 <br /> Ethyl tert-butyl ether ND 2.0 „ <br /> Methyl Cert-butyl ether ND 2.0 " <br /> Tert-amyl methyl ether ND 2,0 „ <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate: l,2-Dichloroethane-d4 513 50.0 102 76-114 <br /> Surrogate: Toluene-d8 52.8 50.0 106 88-110 <br /> LCS(1060101-BSI) Prepared:06/22/01 Analyzed:06/23/01 <br /> Methyl tert-butyl ether 62,8 2.0 ug/l 50.0 126 70-1-30 - <br /> Surrogate, 1,2-Dichloroeihane-d4 53.1 50.0 106 76-114 <br /> Surrogate: Toluene-d8 49.7 50.0 99.4 88-110 <br /> LCS(1060101-BS2) Prepared&Analyzed: 06/24/01 <br /> Methyl tert-butyl ether 42.4 2.0 ug/l 50.0 84.8 70-130 <br /> Surrogate: 1,2-Dichloroethane-d4 50.5 50.0 701 76-114 <br /> Surrogate:Toluene-d8 50.5 50.0 101 88-110 <br /> �oia Analytical- Sacramento The results in this report apply to <br /> the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 7 of 10 <br />