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Acculabs Inc. - Davis Acr-ULA65, INC. <br /> EPA 8260B QC Report <br /> Matrix: Water Date Analyzed: 4/12/00 <br /> QC Batch: VW000412 QC Limits Set: 8118/99 <br /> Spike Cone LCS LCSD Control Chart Limits <br /> Parameter ug/L % Rec % Rec RPD Lower Upper <br /> 1,1-Dichloroethene 50 117 102 13.3 26 139 <br /> Benzene 50 120 102 16.2 83 127 <br /> Trichloroethene 50 94 91 3.7 64 120 <br /> Toluene 50 90 87 3.8 64 129 <br /> OW Chlorobenzene 50 101 102 1.8 88 112 <br /> Control Chart Limits <br /> Surrogate Compound Lower Upper <br /> '-' Dibromofluoromethane 80 122 <br /> Toluene-d8 67 127 <br /> 4-Bromofluorobenzene 51 121 <br /> Tom IQka <br /> Laboratory Director <br /> C:\EXCEL\QC\VW000412.XLS <br />