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lM. rJ <br /> 1455 McDowell Blvd,North,Ste,D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> AnalyticalFAX(quos www.sequoialabs.com wwwsequoialabs.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 02/01/01 1612 <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 1010661 -EPA 5030 waters <br /> LCS(1010661-BSI) Prepared&Analyzed:01/29/01 <br /> Benzene 4.86 0.500 ugll 5.00 97.2 80-119 <br /> Methyl tert-butyl ether 5.45 0.500 5.00 109 79-118 <br /> Toluene 4.65 0.500 5.00 93.0 86-115 <br /> Surrogate:Dibromofluoromethane 4.86 5.00 97.2 88-118 <br /> Surrogate:1,2-Dichloroethane-d4 5.21 5.00 104 81-130 <br /> j Surrogate:Toluene-d8 4.95 5.00 99.0 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.07 5.00 101 78-124 <br /> LCS(1010661-BS3) _ _ Prepared&Analyzed:01/31/01 <br /> Benzene 4.94 0.500 ugll 5.00 98.8 80-119 <br /> Methyl tert-butyl ether 5.18 0.500 5.00 104 79-118 <br /> Toluene 4.75 0.500 5.00 95.0 86-115 <br /> Surrogate:Dibromofluoromethane 5.01 " 5.00 100 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.16 5.00 103 81-130 <br /> Surrogate:Toluene-d8 4.86 5.00 97.2 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.93 5.00 98.6 78-114 <br /> Matrix Spike(1010661-MSI) Source: P101649-07 Prepared&Analyzed:01/29/01 <br /> Benzene 4.89 0.500 ugll 5.00 ND 97.8 80-119 <br /> Methyl ter(-butyl ether 5.39 0.500 5.00 ND 108 79-118 <br /> Toluene 4.82 0.500 5.00 ND 96.4 86-115 <br /> Surrogate.Dibromofluoromethane 4.89 " 5.00 97.8 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.28 5.00 106 81-150 <br /> Surrogate:Toluene-d8 5.01 5.00 100 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.29 5.00 106 78-124 <br /> Matrix Spike Dup(1010661-MSDI) Source: P101649-07 Prepared&Analyzed:01/29/01 <br /> Benzene 4.98 0.500 ugli 5.00 ND 99.6 80-119 1.82 20 <br /> Methyl tert-butyl ether 5.69 0.500 5.00 ND 114 79-118 5.42 20 <br /> Toluene 4.82 0.500 5.00 ND 96.4 86-115 0 20 <br /> Surrogate:Dibromofluoromethane� 4.90 5.00 98.0 88-118 <br /> Surrogate:1,1>Dichloroethane-d4 5.41 5.00 108 81-130 <br /> Surrogate:Toluene-d8 4.95 5.00 99.0 84-115 <br /> Surrogate:4-&omofluorohenzene 5.07 5:00 101 78-124 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document. This analytical report must be reproduced in its entirely. <br /> Page 7 of 8 <br />