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Bvd,North Ste D <br /> - ,Sequoia 1455McI?owpetaluma,CA949 4 <br /> Analytical (707)792-1865 <br /> FAX(707)792-0342 <br /> • www.seyuoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469, Stockton,CA P305380 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 06/18/03 21:10 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> kalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-3(P305380-03)Water Sampled:05/19/03 09:56 Received:05/19/03 11:45 <br /> Tert-amyl methyl ether ND 1.0 ug/l 1 3050783 05/31/03 05/31/03 EPA 8260B <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 1.0 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 <br /> 1,2-Dichloroethane ND 0.50 IF " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 1.0 " <br /> Methyl tert-butyl ether 2.3 0.50 <br /> Surrogate:Dibromofluoromethane 94% 84-122 " <br /> Surrogate: 1,2-Dichloroethane-d4 98% 74-135 " " IF <br /> Surrogate: Toluene-d8 99% 84-119 " <br /> MW-4(P305380-04)Water Sampled:05/19/03 09:08 Received:05/19/03 11:45 <br /> et-armyl methyl ether ND 200 ug/I 200 3050783 05/31/03 05/31/03 EPA 82608 <br /> rt butyl alcohol ND 4000 " <br /> i-isopropyl ether ND 200 " <br /> 1,2-Dibromoethane(EDB) ND 100 <br /> 1,2-Dichloroethane ND 100 <br /> Ethanol ND 20000 " <br /> Ethyl tert-butyl ether ND 200 IF <br /> Surrogate:Dibromofluoromethane 94% 84-122 " <br /> Surrogate: 1,2-Dichloroethane-d4 98% 74-135 IF " " <br /> Surrogate: Toluene-d8 98% 84-119 " <br /> MW-4(P305380-04RE1)Water Sampled:05/19/03 09:08 Received:05/19/03 11:45 <br /> Methyl tert-butyl ether 22000 500 ug/1 1000 3060010 06/02/03 06/02!03 EPA 8260E <br /> Surrogate:Dibromofluoromethane 106% 84-122 11 <br /> Surrogate: 1,2-Dichloroethane-d4 106% 74-135 " <br /> Surrogate: Toluene-d8 107% 84-119 " <br /> eguoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise staled,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 14 of 36 <br />