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885]anis Dr <br /> Morgan Hill C 95037 <br /> Sequoia (408)7T7 6 9600 <br /> FAX(408)792 <br /> Analytical www 6 sequoialabsom <br /> Secor-Rancho Cordova(ARCO} Project ARCO#0595,Stockton,CA MNG0109 <br /> Project Number 62546 Reported <br /> 3017 Kilgore Rd Suite 100 <br /> 07/20/04 20 24 <br /> Rancho Cordova CA, 95670 Project Manager Rusty Benkosky <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result I rout Units Dilution Batch Prepared Analyzed Method Note <br /> MW-7(MNG0109-05)Water Sampled 07/02/04 10 54 Received 07/07/04 10 05 <br /> tert-Amyl methyl ether ND 25 ug/1 5 4G15001 07/15/04 07/15/04 EPA 8260B <br /> Benzene ND 25 <br /> Di-isopropyl ether ND 25 <br /> 1,2-Dtbromoethane(EDB) ND 25 <br /> 1,2-Aichloroethaae 11 25 <br /> Ethanol ND 500 <br /> Ethyl tert-butyl ether ND 25 <br /> Ethylbenzene ND 25 <br /> Methyl tert-butyl ether 69 25 <br /> Toluene ND 25 <br /> Xylenes(total) ND 25 <br /> Gasoline Range Organics(C4-C12) ND 250 <br /> Sturogate 1,2-Dtchlaroethane-d4 102% 78-129 „ <br /> -7(MNG0109-0SRE1)Water Sampled 07/02/04 10 54 Received 07/07/04 10 05 <br /> tert-Butyl alcohol 19 50 ug/1 i 4G16005 07/16/04 07/16/04 EPA 8260B <br /> Surrogate 12-DtchToroethane-d4 <br /> 701% 78-129 „ <br /> MW-8(MNG0109-06)Water Sampled 07/01/0414 27 Received 07/07/0410 05 <br /> tert-Amyl methyl ether ND 050 ug/l 1 4G14020 07/14/04 07/14/04 EPA 8260E <br /> Benzene ND 050 <br /> tent-Butyl alcohol 8 8 5 0 <br /> Do-isopropyl ether ND 050 <br /> 1,2-Dibrornoethane(EDB) ND 050 <br /> 1,2-Dichloroethane ND 050 <br /> 100 " <br /> Ethanol ND <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether 19 050 <br /> Toluene ND 050 „ <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1,2-Dichloroethane-d4 86% 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 an a wet werght basis <br /> 0 This analytical report must be reproduced in its entirety <br /> Page 6 of 21 <br />