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�\ 'A --E9 �t 819 Stdker Avenue,Sulte 8 <br /> l \ Sequoia . • Sacramento, 9Z 95834 <br /> -9600 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequolalabs.com <br /> Sierra-Pacific Groundwater,Inc. Project Unocal Puregro Broadway <br /> ect Number: N/A Reported: <br /> Proj <br /> 4911 Windplay Drive,Ste.4 <br /> El Dorado Hills CA,95762 ProjectManager: John Rapp 06/15/01 16:23 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Nates <br /> Batch 1F05001 -EPA 5030B(MeOH) <br /> Blank(1F05001-BLKI) Prepared&Analyzed:06/05/01 _ <br /> Surrogate: Taluene-d8 2.64 mg/kg 2.50 106 50-150 <br /> Surrogate:4-Bromofluorobenzene 2.60 2.50 104 50-150 <br /> Blank(1F05001-BLK2) Prepared&Analyzed:06/06/01 <br /> Ethanol ND 25 mg/kg <br /> tert-Butyl alcohol ND 2.5 <br /> Methyl cert-butyl ether ND 0.10 " <br /> Di-isopropyl ether ND 0.10 " <br /> Ethyl tert-butyl ether ND 0.10 " <br /> 1,2-Dichloroethane ND 0.10 " <br /> tert-Amyl methyl ether ND 0.10 <br /> 1,2-Dibromoethane ND 0.10 " <br /> Surrogate:Mbromofluoromethane 2.10 2.50 84.0 50-750 <br /> Surrogate:1,2-Dichloroethane-d4 2.20 2.50 88.0 50-150 <br /> Blank(1F05001-BLK3) Prepared&Analyzed:06/07/01 <br /> Dichlorodifluoromethane ND 0.10 mg/kg <br /> Ethanol ND 25 <br /> Chloromethane ND 0.20 <br /> tert-Butyl alcohol ND 2.5 " <br /> Methyl tert-butyl ether ND 0.10 " <br /> Vinyl chloride ND 0.20 " <br /> Bromomethane ND 0.50 " <br /> Di-isopropyl ether ND 0.10 <br /> Chloroethane - ND 0.20 " <br /> Ethyl tert-butyl ether ND 0.10 " <br /> 1,2-Dichloroethane ND 0.10 " <br /> Trichlorofluoromethane ND 020 " <br /> tert-Amyl methyl ether ND 0.10 " <br /> 1,2-Dibromoethane ND 0.10 " <br /> 1,1-Dichloroethene ND 0.20 " <br /> Methylene chloride ND 1.0 " <br /> Methyl tert-butyl ether ND 0.20 " <br /> trans-1,2-Dichloroethene ND 0.25 " <br /> 1,1-Dichloroethane ND 0.10 " <br /> 2,2-Dichlompropme ND 0.20 " <br /> Sequoia Analytical- Sacramento 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 12 of 19 <br />