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ri <br /> 1111111011111101� 885 Jarvis Dr <br /> Sequoia Mogan/lin,CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782 6308 <br /> QO www sequoialahs cpm <br /> Secor-Rancho Cordova Project 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 H111 <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3 MLK0860-03 Water Sampled 11/21/0211 07 Received 11/22/0211 52 <br /> tert-Butyl alcohol ND 20 ugll 1 21,12027 12/04/02 12/05/02 EPA 8260B <br /> Methyl tert-butyl ether 14 0 50 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> tert-Amyl methyl ether ND 050 0-09 <br /> 1,2-Dichloroethane ND 0 50 <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Surrogate 1,2-Dichloroethane-d4 898% 78-129 " <br /> MW4(MLK0860-04)Water Sampled 11/21/02 15 08 Received 11/22/02 1152 <br /> tert-Butyl alcohol ND 2000 ug/l 100 2L12027 12/04/02 12/05/02 EPA 8260B <br /> Methyl tert-butyl ether 67000 50 E <br /> Di-isopropyl ether ND 50 <br /> Ethyl tert-butyl ether ND 50 " <br /> tert-Amyl methyl ether 64 50 0-09 <br /> 1,2-Dichloroethane 350 50 <br /> 1,2-Dibromoethane(EDB) ND 50 " <br /> Surrogate 11-Dichloroethane-d4 894% 78-119 <br /> MW4 LK0860-04RE1 Water Sampled 11/21/02 15 08 Received 11/22/02 1152 <br /> HT-RE <br /> Methyl tert-butyl ether 44000 1000 ugA 2000 2L19025 12/17/02 12/18/02 EPA 8260B <br /> Surrogate 1,1-Dichloroethane-d4 104% 78-129 o' " <br /> MW-5 LK0860-05 Water Sampled 11/20/02 16 56 Received 11/22/02 1152 <br /> tert-Butyl alcohol ND 20 ug/l 1 2L12026 12!04/02 12/04/02 EPA 8260B <br /> Methyl tent-butyl ether 31 0 50 " <br /> Di-isopropyl ether ND 0 50 <br /> Ethyl tert-butyl ether ND 0 50 <br /> tert-Amyl methyl ether ND 050 „ " " „ 0-09 <br /> 1,2-Dichloroethane 4 5 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> Surrogate 11-Dichloroethane-d4 778% 78-129 0-I0 S-LIM <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 /> This analytical report must be reproduced in to entirety <br /> Page 10 of 23 <br />