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I <br /> .'V� 1455 MclJowell Blvd North Ste 4 <br /> Sequoia Peialmna CA 44454 <br /> (707)742 1665 <br /> 1W Analytical FAX wwsequ7)79 s 0342 <br /> corn <br /> www segvocalabs coin <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P310580 <br /> 3017 Kilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06/03 18 54 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units D[tu110n Batch Prepared Analyzed Method Notes <br /> Mid-2(P310580-05)Water Sampled 10/23/03 12 46 Received 10/23/03 14 30 <br /> Benzene ND 0 50 ug/1 1 3110024 11/03/03 11/03/03 EPA 826013 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 0 50 <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Surrogate Dibromofluoromethane 106% 84-121 " <br /> Surrogate 12-Dichloroethane-d4 111% 74-135 ~ ~ <br /> Surrogate Toluene-d8 95% 84-119 " ~ <br /> Mid-1(P310580-06)Water Sampled 10/23/03 12 53 Received 10/23/03 14 30 <br /> Benzene ND 050 ug/l 1 3110024 11/03/03 11/03/03 EPA 82608 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 050 " <br /> *Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dtbromofluoromethane 108°fo 84-122 " <br /> Surrogate 11-Drchloroethane-d4 114% 74-135 ~ " <br /> Surrogate Toluene-d8 92% 84-119 <br /> equota Analytical-Petaluma The results in/his 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 its entirety <br /> Page 7 of 19 <br />