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Sequoia 819 Stalker Avenue,Suite <br /> Sacramento,CA 958344 <br /> (916)921-9600 <br /> FAX(916).921-4100 <br /> ( Analytical www.sequoialabs.com <br /> Kleinfelder-Stockton Project: Del Momte .S3031.81 <br /> 2825.East Myrtle Street Project Number: 12280 Reported: <br /> Stockton CA,95205 Project Manager: Joe Zilles D3/21/03 15:49 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> -Sequoia Analytical -Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %R$C Limits RPD Limit Notes <br /> Batch 3030221 -EPA 5030B [PIT] <br /> Blank(3030221-BLKI) Prepared&Analyzed: 03/14/03 <br /> Tert-butyl alcohol ND 5,0 ug/i <br /> Methyl tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND- 0.50 <br /> Ethyl Cert-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 /> 1,2-Dibromoethane(EDB) ND- 0.50 " <br /> Surrogate:1,2-DCA-d4 11.8 15.0 87 60-140 <br /> I•aboratory Control Sample(303022I-SSI) Prepared&Analyzed:03/14/03 _ <br /> tiyl tert-butyl ether 16.4 .0.50 ug/1 22.4 .. 73 60-140 <br /> Surrogate.-1.2-DCA-d4 21.0 15.0 88 60-140 <br /> Matrix Spike(3030221-MSI) Source:S303181-01 Prepared&Analyzed: 03/14/03 <br /> Methyl tert-butyl ether 20.0 0.50 ug/1 22.4 ND 89 60-140 <br /> Surrogate:1,2-DCA-d4 14:5 15.0 98 60-140 <br /> Matrix Syike Dup(3030221-MSD1) Source:5303181-01 Prepared&Analyzed:03/14/03 <br /> Methyl tert-butyl ether 20.9 0.50 ug/l 22.4 ND .93 60-140 4 25 <br /> Surrogate:l,2-DCA-d4 13.9 25.0 96 60-140 <br /> j <br /> t <br /> l. . ,quola Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> ct+stody document. This analytical report must be reproduced in its entirety. <br /> Page 8 of 9 <br />