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1455 McDowell Blvd.North,Ste.D <br /> Sequoia Petaluma, -1865 <br /> 94954 <br /> 4 (707)79 2-1865 <br /> FAX(707)792-0342 <br /> a- r„ Analytical www.sequoialabs.com <br /> is <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 /> Malyte Result Limit Units level Result %REC Limits RPD Limit Notes <br /> Batch 0100718-EPA 5030 waters <br /> Blank(0100718-BLK3) Prepared&Analyzed: 11/01/00 <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 0.500 " <br /> i,2-Dichloroethane ND 0.500 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0.500 " <br /> Ethyl ten-butyl ether ND 1.00 " <br /> Methyl tent-butyl ether ND 0.500 " <br /> Toluene ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Surrogate:Dibromofluoromethane 4.82 5.00 96.4 88-118 <br /> Surrogate;l,2-Dichloroethane-d4 4.87 5.00 97.4 81-130 <br /> Surrogate:Toluene-d8 4.78 5.00 95.6 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.60 5.00 92.0 78-124 <br /> LCS(0100718-BSI) Prepared&Analyzed: 10/28/00 <br /> Benzene _ 4.91 0.500 ug/1 5.00 98.2 80-119 <br /> Methyl tert-butyl ether 4.34 0.500 5.00 86.8 79-118 <br /> Toluene 4.83 0.500 5.00 96.6 86-115 <br /> I <br /> Surrogate:Dibromofluoromethane 4.72 5.00 94.4 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 4.54 5.00 90.8 81-130 <br /> Surrogate:Toluene-d8 4.80 5.00 96.0 84-115 <br /> Surrogate:4-Bromofluorobenzene 4.50 5.00 90.0 78-124 <br /> LCS(0100718-BS2) Prepared&Analyzed: 10/31/00 <br /> Benzene 5.25 0.500 ug/I 5.00 105 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:Dibramofluoromethane 4.74 5.00 94.8 88-118 <br /> Surrogate:l,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 78-124 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document. This analytical report must be reproduced in its entirety. <br /> a Page 9 of 13 <br />