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FRIEDMAN & BRUYA INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 12/02/99 <br /> 'i Date Received: 11/12/99 <br /> Project: 5380.001 <br /> 1i QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES <br /> FOR VOLATILES BY EPA METHOD 8260B <br /> Laboratory Code: 911069-01 (Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> 1,1-Dichloroethene pg/kg (ppb) <5 <5 nm 0-20 <br /> Benzene pg/kg (ppb) <5 <5 nm 0.20 <br /> Trichloroethene µg/kg (ppb) <5 <5 nm 0-20 <br /> Toluene µg/kg (ppb) <5 <5 nm 0-20 <br /> i <br /> Chlorobenzene µg/kg (ppb) <5 <5 nm 0-20 <br /> Laboratory Code: 911069-01 (Matrix Spike) <br /> 11 <br /> Relative <br /> Reporting Spike Sample %Recovery % Recovery Acceptance Percent <br /> Analyte Units . Level Result MS MSD Criteria Difference <br /> 1,1-Dichloroethene µg/kg (ppb) 50 <5 69 60 50-150 13 <br /> Benzene µg/kg (ppb) 50 <5 89 73 50-150 20 <br /> Trichloroethene ug/kg (ppb) 50 <5 77 69 50-150 11 <br /> Toluene ug/kg (ppb) 50 <5 77 68 50-150 12 <br /> Chlorobenzene µg/kg (ppb) 50 <5 72 70 50-150 3 <br /> 'I Laboratory Code: Laboratory Control Sample <br /> Relative <br /> Reporting Spike %Recovery % Recovery Acceptance Percent <br /> ' _Analyte Units Level LCS LCSD Criteria Difference <br /> 1,1-Dichloroethene pg/kg (ppb) 50 107 109 50-150 2 <br /> Benzene µg/kg (ppb) 50 100 99 50-150 1 <br /> Trichloroethene µg/kg (ppb) 50 107 107 50-150 0 <br /> Toluene µg/kg (ppb) 50 92 92 50-150 0 <br /> Chlorobenzene µg/kg (ppb) 50 94 93 50-150 1 <br /> 1 <br /> nm -The analyte was not detected in one or more of the duplicate analyses. Therefore, calculation of <br /> 'I the RPD is not applicable. <br /> 1i <br /> .22 <br />