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� r <br /> 1455 McDowell Blvd.North,Ste,D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-18665 <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 8260E- 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 0100718-EPA 5030 waters <br /> LCS(0100718-BS3) _ _ _ Prepared&Analyzed: 11/01/00 <br /> Benzene 5.24 0.500 ug/l 5.00 105 80-119 <br /> Methyl tert-butyl ether 5.27 0.500 5.00 105 79-118 <br /> Toluene 4.97 0.500 5.00 99.4 86-115 <br /> Surrogate:Dibromofluoromethane 4.91 _ 5.00 98.1 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.37 5.00 107 81-130 <br /> Surrogate: Toluene-d8 4.63 5.00 92.6 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.63 5.00 91.6 78-114 <br /> Matrix_Spike(0100718-MSI) Source: P010518-01_ Prepared&Analyzed: 10/28/00 <br /> Benzene 5.07 0.500 ug/l 5.00 ND 101 80-119 <br /> Methyl tert-butyl ether 4.71 0.500 5.00 ND 94.2 79-118 <br /> Toluene 4.81 0.500 5.00 ND 96.2 86-115 <br /> Wrog-gawe: <br /> te:Dibromofluoromethane 4.70 5.00 94.0 88-118 <br /> 1,2-Dichloroethane-d4 4.76 5.00 95.1 81-130 <br /> Surrogate:Toluene-d8 4.78 5.00 95.6 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.57 5.00 91.4 78-124 <br /> i.1at_rix Spike Dup(0100118-MSDI) Source: P010518-01 Prepared&Analyzed: 10,'28100 <br /> Benzene 4.99 0.500 ug/1 5.00 ND 99.8 80-119 1.59 20 <br /> Methyl tert-butyl ether 4.69 0.500 5.00 ND 93.8 79-118 0.426 20 <br /> Toluene 4,79 0.500 5.00 ND 95.8 86-115 0.417 20 <br /> Surrogate:Dibromofluoromethane 4.86 5.00 97.2 88-118 <br /> Surrogate: l,2-Dichloroethane-d4 4.85 5.00 97.0 81-130 <br /> Surrogate.- Toluene-d8 4.70 5.00 94.0 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.59 5.00 91.8 78-124 <br /> Batch 0100763-EPA 5030 waters <br /> Blank(0100763-BLKI) _ _ _ Prepared&Analyzed: 10/30/00 <br /> Tert-amyl methyl ether J ND 1.00 UO <br /> Benzene ND 0.500 " <br /> Tert-butyl alcohol ND 20.0 " <br /> Di-isopropyl ether ND 1.00 " <br /> 1,2-Dibromoethane(EDB) 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 /> equoia 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 10 of 13 <br />