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1455 McDowell Blvd.North,Ste.D <br /> Petaluma,CA 94954 <br /> equola (707)792-1865 <br /> FAX(707)792-0342 <br /> Analytical wwwsequoialabs.cbs.com <br /> Cambria Environmental-Emeryville Project: Equiva <br /> i <br /> 6262 Hollis Street Project Number: 341 East Main St,Ripon Reported: <br /> Emeryville CA,94608 Project Manager Owen Ratchye 02/12/01 17:31 <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 1020188-EPA 5030 waters <br /> LCS(1020188-BSI) _ Prepared&Analyzed:02/08/01 _ <br /> Benzene 5.04 0.500 ugll 5.00 101 80-119 <br /> Methyl Cert-butyl ether 5.22 0.500 5.00 104 79-118 <br /> Toluene 4.88 0.500 5.00 97.6 86-115 <br /> Surrogate:Dibromofluoromethane 5.12 5.00 101 88-118 <br /> Surrogate:1,2-Dichloroethane-d4 5.13 5.00 105 81-130 <br /> Surrogate:Toluene-d8 4.78 5.00 95.6 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.17 5.00 103 78-124 <br /> Matrix Spike(1020188-MS1) Source: P102118-03 Prepared&Analyzed:02/08/01 _ <br /> Benzene 5.25 0.500 ug/1 5.00 ND 105 80-119 <br /> Methyl tert-butyl ether - 4 5.63 0.500 5.00 ND 113 79-118 <br /> �uene 5.05 0.500 5.00 ND 101 86-115 <br /> W.gate:Dibromofluoromethane 5.40 5.00 108 88-118 <br /> Surrogate:l,1-Dichloroethane-d4 5.89 5.00 118 81-130 <br /> Surrogate:Toluene-d8 4.96 5.00 99.1 84-115 <br /> Surrogate:4-8romofluorobenzene 5.15 5.00 103 78-124 <br /> Matrix Spike Dup(1020188-MSDI) Source:P102118-03 Prepared&Analyzed:02/08/01 <br /> Benzene 5.03 0.500 ug/l 5.00 ND 101 80-119 4.28 20 <br /> Methyl tent-butyl ether 5.68 0.500 5.00 ND 114 79-118 0.884 20 <br /> Toluene 4.87 0.500 5.00 ND 97.4 86-115 3.63 20 <br /> Surrogate:Dibromofluoromethane 5.38 5.00 108 88-118 <br /> Surrogate. l,2-Dichloroethane-d4 5.64 5.00 113 81-130 <br /> Surrogate:Toluene-d8 4.87 5.00 97.4 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.11 5.00 102 78-124 <br /> quoia 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 8 of 9 <br />