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Sequoia 1455 McDowell Blvd North,Ste D <br /> „ Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical www <br /> (707)792-0342 <br /> sequoralabs com <br /> Gettler-Ryan-Dublin Project Tosco <br /> 6747 Sierra Ct,Suite I Project Number 2701 West March Lane,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 02/27/01 10 24 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Petaluma <br /> Analyte Reporting Spike Source %REC RPD <br /> Result Irma Units Level Result %aREC Limits RPD LimitNotes <br /> Batch 1020079-EPA 5030 waters <br /> Blank(1020079-BLK3) Prepared&Analyzed 02/05/01 <br /> Surrogate Toluene-d8 504 ug/1 Soo I01 84-115 <br /> ' Blank(102D079-BLK4) Prepared&Analyzed 02/06/01 <br /> Tert-amyl methyl ether ND 100 ug/! <br /> Tert-butyl alcohol ND 200 <br /> Di-isopropyl ether ND 100 " <br /> 1,2-Dibrornoethane(EDB) ND 0 500 " <br /> 1,2 Dichloroethane ND 0 500 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 1 00 <br /> Methyl tert-butyl ether ND 0 500 " <br /> Surrogate Dibromofluoromethane 517 500 103 88-118 <br /> ate 12-Dichloroethane-d4 509 " 500 101 81 130 <br /> gale Toluene-d8 508 500 101 84-115 <br /> LCS(1020079-BS]) Prepared&Analyzed 02/04/01 <br /> Methyl tert-butyl ether 553 0 500 ug/l 500 111 79-118 <br /> Surrogate Dibromofluoromethane 521 500 104 88-118 <br /> Surrogate 12-Dichloroethane-d4 526 500 105 81-130 <br /> Surrogate Toluene-d8 506 500 101 84-115 <br /> LCS(1020079-BS2) Prepared&Analyzed 02/05/01 <br /> Methyl tert-butyl ether 503 0 500 ug/l 500 101 79-118 <br /> Surrogate Dibromofluoromethane 512 500 102 88-118 <br /> Surrogate 12-Dichloroethane-d4 520 500 104 81-130 <br /> Surrogate Toluene-d8 497 500 994 84-115 <br /> GCS(l 020079-BS3) Prepared&Analyzed 02/05/01 <br /> Methyl tett-butyl ether 5 15 0 500 ugA 500 103 79-118 <br /> Surrogate Dibromofluoromethane 503 Soo 101 88-118 <br /> Surrogate 12-Dichloroethane-d4 490 500 980 81-130 <br /> Surrogate Toluene-d8 509 500 102 84-115 <br /> SS ota Analytical-Petalurm 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 l l of 14 <br />