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1455 McDowell Bivd.Borth,Ste.D <br /> uma,CA4954 <br /> Sequoia Petal <br /> 1(707)792-1865 <br /> FAX(707)792-0342 <br /> Analytical www,sequoialabs.com <br /> Cambria Environmental-Oakland Project: Equiva <br /> 1144 65th St.,Suite C Project Number: 341 E. Main Street,Ripon [reported: <br /> Oakland CA,94608 Project Manager: Darryk Ataide 10/11/00 16:59 <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 0100227-EPA 5030 waters <br /> Blank(0100227-BLKI) __ _ _ -_Prepared&Analyzed: l0/09/00 <br /> Teri-amyl methyl ether ND 1.00 ug/1 <br /> Tert-butyl alcohol ND 20.0 " <br /> Di-isopropyl ether ND 1.00 <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 1.00 " <br /> Methyl tert•butyl ether ND 0.500 " <br /> Surrogate:Dibromofluoromethane-- - � LL 5.38 � 5.00 - - 108 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.00 5.00 100 81-130 <br /> Surrogate:Toluene-d8 5.60 5.00 111 84-115 <br /> Blank(0100227-BLK2)_ _ _ _ _ _ Prepared: 10/09/00 Analyzed: 10/10100 <br /> Wamyl methyl ether ND 1.00 ug/l <br /> -butyl alcohol ND 20.0 " <br /> Di-isopropyl ether ND 1.00 " <br /> Ethanol ND t00 " <br /> Ethvl tert-butyl ether ND 1.00 " <br /> Methyl tert-butyl ether ND 0.500 <br /> Surrogate:Dibromofluoromelhane 5.44 5.00 109 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 5.05 5.00 101 81-130 <br /> Surrogate:Toluene-d8 5.68 5.00 114 84-115 <br /> GCS(0100227-BSI) Prepared&Analyzed: 10/09/00 <br /> Methyl tert-butyl ether 4.84 0.500 ug/1 5.00 96.8 72.7-119 <br /> Surrogate:Dibromofluoromethane 5.34 5.00 107 88-118 <br /> Surrogate:l,1-Dichloroethane-d4 4.96 5.00 99.2 81-130 <br /> Surrogate:Toluene-d8 5.63 5.00 113 84-115 <br /> _LCS(0100227-BS2) Prepared: 10/09/00 Analyzed: 10/10/00� <br /> Methyl ten-butyl ether 5.00 0.500 ug/1 5.00 100 72,7-119 <br /> Surrogate:Dibromofluoromethane 5.41 5.00 108 88-118 <br /> Surrogate:l,2-Dichloroethane-d4 4.88 5.00 97.6 81-130 <br /> Surrogate:Toluene-d8 5.62 5.00 112 84-115 <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 7 of 9 <br />