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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX(707)792-0342 <br /> Analytical www sequoealabs co 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 /> FAnalyte. Result Limit Units Level Result %REC Limits RPD Limit Nates <br /> Batch 1010684-EPA 5030 waters <br /> Blank(1010684-BLKl) Prepared&Analyzed 01/30/01 <br /> Tcn-amyl methyl ether ND 100 ugfl <br /> Tert-butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 100 " <br /> 1,2-Dibramoethane(EDB) ND 0 500 " <br /> 1,2-Dichloroethane ND 0 500 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 100 " <br /> Methy]tert-butyl ether ND 0 500 " <br /> Surrogate Dibromofluoromethane 510 500 101 88-118 <br /> Surrogate 1 1-Dichloroethane-d4 500 500 100 81-130 <br /> Surrogate Toluene-d8 509 500 101 84-115 <br /> (1010684-BS1) Prepared&Analyzed 01/30/01 <br /> Methyl tert-butyl ether 508 0 500 ug/I 500 102 79 118 <br /> Surrogate Dibromofluoromethane 497 500 994 88-118 <br /> Surrogate 12-Drehloroethane-d4 485 500 970 81430 <br /> Surrogate Toluene-d8 500 500 100 84-115 <br /> Matnx Spike(1010684-MSI) Source P101661-02 Prepared&Analyzed 01/30/01 <br /> Methyl tert-butyl ether 18700 250 USA 2500 15000 t48 79-118 QM-4X <br /> Surrogate Dibromofluoromethane 502 500 100 88-118 <br /> Surrogate 1 2-Dichloroethane-d4 502 Soo 100 81-130 <br /> Surrogate Toluene-d8 506 500 101 84-115 <br /> Matnx Spike Dup(1010684-MSDI) Source P101661-02 Prepared&Analyzed 01/30/01 <br /> Methyl tert-butyl ether 18500 250 ugll 2500 15000 140 79-116 1 08 20 QM4X <br /> Surrogate Dibromofluoromethane 518 500 104 88418 <br /> Surrogate 1 1-Dichloroethane-d4 514 " 500 103 81-130 <br /> Surrogate Toluene-d8 497 Soo 994 84-115 <br /> 0uola 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 to its entirety <br /> Page 16 of 19 <br />