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46 <br /> A 885 Jarvis Dr <br /> Sequoia Mcrgan Hill,CA 95037 <br /> (408)776-4600 <br /> ' ► Analytical FAX(408)782 6308 <br /> www sequoialabs can <br /> ecor-Rancho Cordova Protect ARCO#!4932,Stockton,CA MLK0860 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/23/02 10 48 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> EW-2(MLK0860-12)Water Sampled 11/21/02 14 20 Received 11/22/02 11 52 <br /> tert-Butyl alcohol 3600 2000 ug/1 100 2L12027 12/04/02 12/05/02 EPA 8260E <br /> Methyl tert-butyl ether 90000 50 E <br /> Dr-isopropyl ether ND 50 " <br /> Ethyl tert-butyl ether ND 50 " <br /> tert-Amyl methyl ether 120 50 009 <br /> 112-Drchloroethane ND 50 " <br /> 1,2-Dibromoethane(EDB) ND 50 " <br /> Surrogate 1,2-Drchloroethane-d4 802% 78-129 " <br /> EW-2(MLK0860-12RE1)Water Sampled 11/21/02 14 20 Received 11/22/02 11 52 HT-RE <br /> Methyl tert-butyl ether 81000 2500 ugfl 5000 2L19025 12/17/02 12/18/02 EPA 82608 <br /> Surrogate 1,2-Drchloroethane-d4 100% 78-129 " <br /> EW-6(MLK0860-13)Water Sailed 11/21/021630 Received 11122/021152 <br /> tert-Butyl alcohol ND 200 ug/1 10 2L12027 12/04/02 - 12/05/02 . .EPA 8260B. - <br /> thyl tert-butyl ether 280 50 <br /> isopropyl ether ND 5 0 <br /> yI tert-butyl ether ND 5 0 <br /> tert-Amyl methyl ether ND 50 0-09 <br /> 1,2-Dichloroethane 13 50 " <br /> 1,2-Dibromoethane(EDB) ND 50 " <br /> Surrogate 1,2-Drchloroethane-d4 882% 78-129 " <br /> DMW-1 MLK0860-14 Water Sam led 11/21/02 09 15 Received 11/22/02 11 52 <br /> tert-Butyl alcohol ND 20 ug/I 1 2L12027 12/04/02 12/05/02 EPA 8260B <br /> Methyl tert-butyl ether 21 0 50 " <br /> Dt-isopropyl ether 13 0 50 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tent-Amyl methyl ether ND 050 0-09 <br /> 1,2-Dichloroethane 43 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 1,2-Drchloroethane-d4 854% 78-129 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> • custody document Unless otherwise stated,results are reported on a wet weight basis <br /> Ars analytical report must be reproduced to its entirety <br /> I <br /> i <br /> Page 13 of 23 <br />