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' 404 N Wiget lane <br /> ` Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX <br /> Analytical alabs c <br /> www sequollabs 73 <br /> qucom <br /> Secor-Rancho Cordova Protect Arco <br /> 3017 Kilgore Rd,Ste #100 Protect Number Arco#595, Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 29-Aug-01 11 26 <br />' Volatile Organic Compounds by EPA Method 8260E - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Lnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IG26012- EPA 5030B(P/T) <br />[CS(1G26012-BSI) _ Prepared&Analyzed 26-Jul-01 - <br /> ethyl tert-buty]ether(MTBE) 49 1 Yo ugA 500 982 70430 <br /> Surrogate Dibromofluoromethane 55-0 - 50 0 110 50-150 <br /> L <br /> rogale 12-Dichloroethane-d4 51 0 500 102 50-150 <br /> S(IG26012-BS2) Prepared&Analyzed 27-Jul-01 <br /> Methyl tert-butyl ether(MTBE) 493 W 2 0� ug/l 500 986 70-130 <br /> Errogate <br /> rrogate Dibromofluoromethane 513 500 103 50-150 <br /> 1 2-Dichloroethane-d4 492 500 984 50-150 <br /> LCS(IG26012-BS3) Prepared&Analyzed 28-Jul-01 <br /> tethyl tert-butyl ether(MTBE) _ _ 426 2 0 ugA Soo 852 70-130 <br /> Surrogate DibromoJluoromethane 479 500 958 50-150 <br />*-r-r- <br /> 1 2-Dichloroethane-d4 492 500 984 50-150 <br /> p(IG26012-BSD1) _ Prepared 26-Jul-01 Analyzed 27-Jul-01 <br /> Methyl tent-butyl ether(MTBE) 459 1 0 ug/l 500 918 70-130 674 200 <br /> Iurrogale Dibromofluoromethane 53 0 500 106 50-150 <br /> urrogare 12-Dichloroethane-d4 480 " 500 960 50-150 <br /> Matrix Spike(1G26012-MSI) Source W107224-05 Prepared 26-Jul-01 Analyzed 27-Jul-01 <br /> thyl tert-butyl ether(MTBE) 652 1 0 ugA Soo ND 130 60-150 <br /> I-Irrogaie- <br /> Dibromofluoromethane 500 500 100 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 460 500 920 50-150 <br /> atrix Spike Dup(1G26012-MSDI) Source W107224-05 Prepared 26-Jul-01 Analyzed 27-Jul-0I <br /> ethyl tett-butyl ether{MTBE) 54 6 1 0 ugA 50 0 Nb 109 60-150 177 25 - <br /> Surrogale-Dibromgfluoromethane 520 500 104 50-150 <br /> roga`e <br /> 1 2-Dichloroethane-d4 480 500 960 50-150 <br /> 1 <br /> E <br /> equola Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document 77its analytical report must be reproduced in its entirety <br /> Page 9 of 13 <br /> i VX9 <br />