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885 Janis 1)r <br /> Sequoia Morgan Hill 77 95017 <br /> 9600 <br /> (408)776 9600 <br /> Analytical www <br /> labsco82 8 <br /> www scquoialabs coin <br /> Secor-Rancho Cordova(ARCO) Project ARCO#0595, Stockton, CA MNGO 109 <br /> 3017 Kilgore Rd Suite 100 Project Number 62546 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/20/04 20 24 <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 Note <br /> DMW-3(MNG0109-11)Water Sampled 07/02/04 10 45 Received 07/07/04 10 05 <br /> tert-Amyl methyl ether ND 25 ugll 5 4G15001 07/15/04 07/15/04 EPA 8260B <br /> Benzene ND 2 5 " <br /> Di-isopropyl ether ND 2 5 " <br /> 1,2-Dtbromoethane(EDB) ND 25 <br /> 1,2-Dicbloroethane 19 25 <br /> Ethanol ND 500 " <br /> Ethyl tert-butyl ether ND 2 5 " <br /> Ethylbenzene ND 2 5 <br /> Methyl tert-butyl ether 86 25 <br /> Toluene ND 25 <br /> Xylenes(total) ND 2 5 <br /> Gasoline Range Organics(C4-C12) ND 250 <br /> Surrogate 1,2-Dichloroethane-d4 106% 78-129 " <br /> 0—MW-3(MNG0109-11RE1)Water Sampled 07/02/04 10 45 Received 07/07/04 10 05 <br /> tort-Butyl alcohol 22 50 ug/l i 4G16005 07/16/04 07/16/04 EPA 8260B <br /> Surrogate 1,2-Drchloroethane-d4 102% 78-129 " <br /> WSW(MNG0109-12)Water Sampled 07/02/04 09 16 Received 07/07/04 10 05 <br /> tert-Amyl methyl ether ND 050 ugll 1 4015001 07/15/04 07/16/04 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 5 0 " <br /> Dr-isopropyl ether ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 050 n <br /> Ethylbenzene ND 050 <br /> Methyl ter't-butyl ether 057 050 <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1 2-Dichloroethane-d4 103% 78-129 " <br /> Sequoia Analytical - Morgan H111 The results rrr lhrs report apply to the samples mialyzed rn accordance wr[h the churn of <br /> custody document Unless oihenvise slated results are reported on a we!weight baso <br /> This analytical report must be reproduced ur us enirrely <br /> Page 9 of 21 <br />