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1455 McDowell Blvd.North,Ste.D <br /> Sequoia <br /> Petaluma, <br /> CA <br /> 2-1865 <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 St,Ripon Relwrted: <br /> Emeryville CA,94608 Project Manager: Owen Rastchye 11/15/00 07:33 <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 0110308-EPA 5030 waters <br /> Blank(0110308-BLKI) _ _ - Prepared&Analyzed: 1 II]_1/00 <br /> Tert-amyl methyl ether ND 1.00 ug/l <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 x500 " <br /> 1,2-Dichloroethane ND 0.500 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0.500 " <br /> Ethyl tent-butyl ether ND 1.00 " <br /> Methyl tert-butyl ether ND 0.500 " <br /> Toluene ND 0.500 " <br /> cnes(total) ND _ 0.500 ------ -- - -_- - --- - --- - <br /> wlrogate:Dibrontofluoromethane - 4.67 5.00 93.4 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 4.58 5.00 91.6 81-130 <br /> Surrogate:Toluene-d8 4.70 5.00 94.0 84-115 <br /> Surrogate:4-Bromojtuorobenzene 4.53 5,00 90.0 78-124 <br /> LCS 0110308-BSI _ Prepared&Analyzed: 11/11/00 <br /> Benzene 4.84 0.500 ug/l 5.00 96.8 80-119 <br /> Methyl tert-butyl ether 4.50 0.500 5.00 90.0 79-118 <br /> Toluene 4.63 0.500 „ 5.00 92.6 86-115 <br /> Surrogate:Dibramofluoromethane 4.64 115.00 92.8 88-118 <br /> Surrogate: l,2-Dichloroethane-d 4 4.70 11 5.00 94.0 81-130 <br /> Surrogate:Toluene-d8 4.64 115.00 92.8 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.35 115.00 87.0 78-114 <br /> M_atrix_S_pike(OI 10308-MSI) _ _Source: P011255-02 _ Prepared&Analyzed: 11/11/00 <br /> Benzene 4.89 0.500 ug/l 5.00 ND 97.8 80-119 <br /> Methyl tert-butyl ether 4.65 0.500 5.00 ND 93.0 79-118 <br /> Toluene 4.78 0.500 " 5.00 ND 95.6 86-115 <br /> Surrogate:Dibromofluoromethane 4.70 5.00 94.0 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 4.66 115.00 93.2 81-130 <br /> Surrogate.Toluene-d8 4.64 5.00 92.8 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.31 115.00 86.2 78-124 <br /> quoia Analytical-Petaluma The results in this report apply 10 the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 6 of 8 <br />