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1455 McDowell Blvd.North,Ste.1) <br /> Petaluma,CA 94954 <br /> 4 la) Sequoia (707)792-1865 <br /> FAX(707)792-0342 <br /> l„) Analytical www.sequoialabs.com <br /> M <br /> Cambria Environmental-Oakland Project: Equiva <br /> 1 144 65th St.,Suite C Project Number: 341 E. Main St., Ripon Reported: <br /> Oakland CA,94608 Project Manager: Owen Ratchye 10/06/00 17:59 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0100064-EPA 5030 waters <br /> Blank(0100064-BLKI) Prepared&Analyzed: 10/03/00 <br /> Tert-amyl methyl ether ND 1.00 ugll <br /> Tert-butyl alcohol ND 20.0 " <br /> Di-isopropyl ether ND 1.00 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 1.00 " <br /> Methyl tert-butyl ether ND 0.500 " <br /> Surrogate:Dibromofluoromethane 5.42 5.00 108 88-118 <br /> Surrogate.-1,2-Dichloroethane-d4 5.35 5.00 107 81-130 <br /> Surrogate:Toluene-d8 4.95 5.00 99.0 84-115 <br /> Blank.(0100064-BLK2) _ Prepared&Analyzed: 10/04/00 <br /> Tert-amyl methyl ether ND 1.00 ugA <br /> Tert-butyl alcohol ND 20.0 " <br /> Di-isopropyl ether ND 1.00 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 1.00 " <br /> Methyl tert-butyl ether ND 0.500 " <br /> Surrogate:Dibromofluoromethane 5.28 5.00 106 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.22 5.00 104 81-130 <br /> Surrogate: Toluene-d8 4.96 5.00 99.2 84-115 <br /> LCS(0100064-BSI) Prepared&Analyzed: 10/03/00 <br /> Methyl tert-butyl ether 5.14 0.500 ugA 5.00 103 72.7-119 <br /> Surrogate:Dibromofluoromethane 5.55 5.00 111 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.48 5.00 110 81-130 <br /> Surrogate:Toluene-d8 5.06 5.00 101 84-115 <br /> LCS(0100064-BS2) _ Prepared&Analyzed: 10/04/00 <br /> Methyl tert-butyl ether 5.03 0.500 ug/1 5.00 101 72.7-119 <br /> Surrogate:Dibromofluoromethane 5.39 5.00 108 88-118 <br /> Surrogate. l,2-Dichloroethane-d4 5.39 5.00 108 81-130 <br /> Surrogate:Toluene-d8 4.94 5.00 98.8 84-115 <br /> Sequoia 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 7 of 9 <br />