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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical www <br /> (707)792 0342 <br /> sequoialabs com <br /> Gettler-Ryan- Dublin Project Tosco <br /> 6747 Sierra Ct,Suite J Project Number 2701 W March Lane, Stockton Ca Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 02/15/01 10 28 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result bmit Units Level Result %RFC Limits RPD limit Nous <br /> Batch 1010516-EPA 5030 waters <br /> Blank(1010516-BLK1) Prepared&Analyzed 01/23/01 <br /> Tert-amyl methyl ether ND 100 ug/l <br /> Tert-butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 100 " <br /> 1,2-Dibromoethane(EDB) ND 0 500 " <br /> 1,2-Dichloroethane ND 0500 " <br /> Ethanol ND 100 " <br /> Ethyl tent-butyl ether ND 100 " <br /> Methyl tent-butyl ether ND 0 500 " <br /> Surrogate Dibromofluoromethane 484 Soo 968 88-118 <br /> Surrogate 12-Dichloroethane-d4 4 70 500 940 81-130 <br /> Surrogate Toluene-d8 507 500 101 84-115 <br /> !k(1010516-BLK3) Prepared&Analyzed 01/30/01 <br /> Tert-amyl methyl ether ND too ugll <br /> Tert-butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND 0 500 <br /> 1,2-Dichloroethane ND 0500 " <br /> Ethanal ND 190 <br /> Ethyl Cert-butyl ether ND too <br /> Methyl tert-butyl ether ND 0 500 " <br /> Surrogate Dibromofluoromethane 5 18 500 104 88-118 <br /> Surrogate 1 2-Dichloroethane-d4 510 " Soo 102 81-130 <br /> Surrogate Toluene-d8 502 " 500 100 84-115 <br /> Blank(1010516-BLK4) Prepared&Analyzed 01/31/01 <br /> Tert-amyl methyl ether ND too ugll <br /> Tert-butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 100 " <br /> 1,2-Dibromoethane(EDB) ND 0500 " <br /> 1,2-Dichloroethane ND 0500 " <br /> Ethanol ND 100 " <br /> Ethyl tent-butyl ether ND 100 " <br /> Methyl tert-butyl ether ND 0 500 " <br /> Surrogate Dibromofluoromethane 510 500 101 88-118 <br /> Surrogate 1 2-Dichloroethane-d4 519 500 104 81-130 <br /> i <br /> �uota Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 14 of 19 <br />