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i t <br /> • 1455 McDowell Blvd.North,Ste.D <br /> 5 e quo la Petaluma,CA 94954 <br /> (707)792-1865 <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 Street,Ripon Reported: <br /> Emeryville CA,94608 Project Manager: Owen Rastchye 11/01/00 16:18 <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 0100763-EPA 5030 waters <br /> LCS(0100763-BS3) _ _ Prepared&Analyzed: 10/31/00 <br /> Benzene - - - -- --� 5.25 - 0.500 ug/l 15.00 105 80-119 <br /> Methyl tert-butyl ether 5.35 0.500 5.00 107 79-118 <br /> Toluene 5.05 0.500 5.00 101 86-115 <br /> Surrogate:Dibromofluoromethane 4.74 5.00 94.8 88-118 <br /> Surrogate: 1,2-Dichloroethane-d4 5.02 5.00 100 81-130 <br /> Surrogate: Toluene-d8 4.67 5.00 93.4 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.58 5.00 91.6 78-114 <br /> Matrix Spike(0100763-MSI) Source: P010523-02 Prepared&Analyzed: 10/30/00 <br /> Benzene - --- i - 5.27 0.500 -ug/l -- 5.00 ND 104 80-119 - <br /> Methyl tert-butyl ether 4.82 0.500 5.00 ND 94.8 79-118 <br /> Toluene 5.05 0.500 5.00 ND 101 86-115 <br /> rugale:Dibrornofluoromethane 4.62 5.00 91.4 88-118 <br /> jar <br /> -Dichloroethane-d4 4.72 5.00 94.4 81-130 <br /> Surrogate: Toluene-d8 4.85 5.00 97.0 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.78 " 5.00 95.6 78-124 <br /> Matrix Spike Du_p(0100763-4NiSDl) Suurce: P010523-02 Prepared&Analyzed: 10/30/00 <br /> Benzene 5.33 0.500 ug/] 5.00 ND 105 80-119 1.13 20 <br /> Methyl tert-butyl ether 4.97 0.500 5.00 ND 97.8 79-118 3.06 20 <br /> Toluene 5.06 0.500 5.00 ND 101 86-115 0.198 20 <br /> Surrogate:Dlbromofluoromethane 4.86 5.00 97.2 88-118 <br /> Surrogate: l,2-Dichloroethane-d4 4.87 5.00 97,4 81-130 <br /> Surrogate: Toluene-d8 4.76 5.00 95.2 84-115 <br /> Surrogate 4-Brornofluorobenzene 4.78 5.00 95.6 78-124 <br /> Wquoia 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 12 of 13 <br />