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1455 McDowell Blvd.North,Ste.D <br /> uma,CA4954 <br /> Sequoia Petal(707)792-1865 <br /> Sequoia <br /> FAX(707)792-0342 <br /> Analytical www.sequoialabs.com <br /> Cambria Environmental-Emeryville Project: Equiva <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Reported: <br /> Emeryville CA,94608 Project Manager: Owen Ratchye 01/22/01 16:28 <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 1010440-EPA 5030 waters <br /> Blank(5010440-BLK1) Prepared&Analyzed:01/19/01 <br /> Tert-amyl methyl ether ND 1.00 ug/1 <br /> Benzene ND 0.500 " <br /> Tert-butyl alcohol ND 20.0 " <br /> Di-isopropyl ether ND 1.00 " <br /> 1,2-Dibrommthane(ED13) ND 0.500 " <br /> 1,2-Dichloroethane ND 0.500 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0.500 " <br /> Ethyl tert-butyl ether ND 1.00 " <br /> Methyl tert-butyl ether ND 0.500 <br /> �uene ND 0.500 <br /> enes(total) ND 0.500 <br /> Surrogate:Dibrom uoromethane 4.70 5.00 94.0 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.08 5.00 102 81-130 <br /> Surrogate:Toluene-d8 5.09 5.00 102 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.56 5.00 111 78-124 <br /> LCS(1010440-BSI) Prepared&Analyzed:01/19/01 <br /> Benzene 4.87 0.500 ug/l 5.00 97.4 80-119 <br /> Methyl tert-butyl ether 4.92 0.500 5.00 98.4 79-118 <br /> Toluene 5.06 0.500 5.00 101 86-115 <br /> Surrogate:Dibromofluoromethane 4.70 5.00 94.0 88-118 <br /> Surrogate:1,2-Dichloroethane-d4 4.91 5.00 98.2 81-130 <br /> Surrogate:Toluene-d8 5.18 5.00 104 84-115 <br /> Surrogate.4-Bromofluorobenzene 5.47 5.00 109 78-124 <br /> Matrix Spike(1)10440-MSI) Source: P101325-01 Prepared&Analyzed:01/19/01 <br /> Benzene 9.09 1.00 ug/1 10.0 ND 90.9 80-119 <br /> Methyl tert-butyl ether 83.9 1.00 10.0 73.8 101 79-118 <br /> Toluene 9.35 1.00 10.0 ND 93.5 86-115 <br /> Surrogate:Dibromofluoromethane 4.69 S.00 93.8 88-118 <br /> Surrogate. l,2-Dichloroethane-d4 5.08 5.00 102 81-130 <br /> Surrogate:Toluene-& 5.14 5.00 103 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.54 5.00 Ill 78-124 <br /> t;uoia 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 entirely. <br /> Page 6 of 8 <br />