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1455 Mci)owell Blvd.North,Ste.D <br /> uma,CA 9954 <br /> Sequoia <br /> Petal(707)792-1 <br /> J 865 <br /> FAX(707)792-0342 <br /> Analytical www.sequoialabs.com <br /> �4 <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 16:12 <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 /> Blank(1010661-BLKI) Prepared&Analyzed:01/29/01 <br /> Tert-amyl methyl ether ND 1.00 ugA <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 tent-butyl ether ND 1.00 " <br /> Methyl tert-butyl ether ND 0.500 " <br /> Toluene ND 0.500 " <br /> -nes(fora]) ND 0.500 <br /> arrogate:Dibromafluoromethane 4.91 5.00 103 88-118 <br /> Surrogate: 1,1-Dichloroethane-d4 5.16 5.00 103 81-130 <br /> Surrogate: Toluene-d8 4.78 5.00 95.6 84-115 <br /> Surrogate:4-Bramofluorobenzene 5.07 5.00 101 78-114 <br /> Blank(101066_1-_B_LK3)_ T Prepared&Analyzed:01/31/01 <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 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 /> Toluene <br /> ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Surrogate:Dibromofluoromethane 5.04 5.00 101 88-118 <br /> Surrogate:1,1-Dichloroethane-d4 5.14 <br /> 5.00 103 81-130 <br /> Surrogate:Toluene-d8 5.00 " 5.00 100 84-115 <br /> Surrogate:4-Bromofluorobenzene 5.21 5.00 104 78-124 <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 6 of 8 <br />