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Sequoia 404 N ' <br /> Walnut Geek CA CA lane <br /> 94598 <br /> 1 (925)988-9600 <br /> Analytical FAX(925)988 9673 <br /> FAX <br /> sequotalabs com ' <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgoi-L Rd Stc. #100 Project Number Arco# 595, Stockton Reported , <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 29-Aug-01 I 1 31 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control ' <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RLC Lunits RPD Limit Notes <br /> 39tch 1IG27018 - EPA 5030B (MeOH) <br /> 31ank(IG27018-B1 KI) Prepared 26-Jul-01 Analyzed 27-Jul-01 ' <br /> ert-But}I alcohol ND 2 5 mglLg <br /> .ALOINI tort-buts I ether(MTBE_) ND 020 <br /> )I-Isopropyl ether ND 0 10 , <br /> th)t ten butyl ether ND 0 10 <br /> en-Amyl methyl ether ND 0 10 <br /> 2-Dichloroethane ND 010 <br /> 2-Dibrontoethanc ND 020 ' <br /> surrogate Dibroiriofluoromethane 239 250 956 50 150 <br /> surrogate 1 2-Dichloroerhane-d4 233 250 931 50 150 <br /> Blank(IG27018-BLK2) Prepared 26-Jul-01 Analyzed 28-Jul-01 , <br /> en-Butyl alcohol ND 2 5 mgfk-. <br /> Methyl lert-but)I ether(MTB C) ND 020 • <br /> 9i-Isopropyl ether ND 010 ' <br /> Ethyl tert-butyl ether ND 0 10 <br /> en-Amyl methyl ether ND 0 10 <br /> II-Dichloroethane ND 010 ' <br /> 12-Mbromoethane ND 020 " <br /> Surrogate Dibromofluoromethane 233 250 931�50-150 <br /> Surrogate 12-Dichloroethane-d4 152 250 101 50-150 ' <br /> Blank(IG27018-BLK3) Prepared 31-Jul-01 Analyzed 01-Aug-01 <br /> Ethanol ND� 25 milli ------- -- - <br /> ,ert-Butyl alcohol ND 25 <br /> Methyl tert-butyl ether(MTBE) ND 020 " <br /> D[-isopropyl ether ND 0 10 " <br /> Ethyl tent-butyl ether ND 010 <br /> tort-Amyl methyl ether ND 0 10 <br /> 1,2-Dichioroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 , <br /> Surrogate DibromoJluoromethane 137 " 250 948 50-150 <br /> Surrogate 12-Dichloroethane-d4 237 250 948 50-150 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of ' <br /> custody document Ats analytical report must be reproduced in its enterle <br /> Page 13 of 16 ' <br />