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Sequoia 819 <br /> Sacramento,CA 95834 <br /> D <br /> (916)921-9600 <br /> 4 - <br /> AnalFAX(416)921-0100 <br /> ytical <br /> . Y FAX <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: 5469,Stockton,CA Reporters: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 03/06/02 13:41 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality. Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %UC RPD <br /> Analyte Result limit Units level Result %RBC limits RPD Limit Notes <br /> Batch 2020279-EPA 5030B [PIT] <br /> LCS(2020279-BSI) Prepared&Analyzed:02/25/02 <br /> Methyl tent-butyl ether 23.5 0.50 ug/l 25.0 94.0 60-140 <br /> Surrogate--1,2-DCA-d4 26.5 1115.0 106 60-140 <br /> Matrix Spike(2020279-MSI) Source:5202329-08 Prepared&Analyzed:02/25/02 <br /> Methyl tert-butyl ether 47-2 0.50 ugll 25.0 22 101 60-140 <br /> i <br /> Surrogate.,1,2-DCA-d4 28.0 25.0 112 60-140 <br /> Matrix Spike Dup(2020279-MSD!) Source: 5202329-08 Prepared&Analyzed:02/25/02 <br /> Mcthy]tcrt-butyl ether 46.3 0.50 ug/l 25.0 22 97.2 60-140 1.93 25 <br /> Surrogate:1,2-DCA-d4 27.8 .25.0 111 60-140 <br /> itch 202031.2-EPA 5030B [P/TJ <br /> Blank(2020312-BLKI) Prepared&Analyzed:02/27/02 <br /> Tert-butyl alcohol ND 5.0 ug/l <br /> Methyl tent-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Tert-amyl methyl ether ND 0.50 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibromide ND 0.50 " <br /> Surrogate:1,2-DCA-d4 21.2 15.0 84.8 60-140 <br /> LCS(2020312-BSI) Prepared&Analyzed: 02/27/02 <br /> Methyl tort-butyl ether 26.7 0.50 ugA 25.0 107 60-140 <br /> Surrogate:1,2-DCA-d4 21.5 25.0 86.0 60-140 <br /> i <br /> i <br /> i <br /> equoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> I <br /> i <br /> Page 13 of 15 <br />