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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-18553-1 <br /> Lab Control Spike/ Method: 8260B <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-47926 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-47926/2 Analysis Batch: 720-47926 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200903\032309\LS-WA <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 03/23/2009 0820 Final Weight/Volume: 40 mL <br /> Date Prepared: 03/23/2009 0820 <br /> LCSD Lab Sample ID:LCSD 720-47926/1 Analysis Batch: 720-47926 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200903\032309\LD-WA <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 03/23/2009 0852 Final Weight/Volume: 40 mL <br /> Date Prepared: 03/23/2009 0852 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 107 107 70- 130 0 20 <br /> Trichloroethene 96 99 70- 130 3 20 <br /> Chlorobenzene 96 99 70- 130 3 20 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 92 102 82- 120 <br /> 4-Bromofluorobenzene 87 90 74- 131 <br /> 1,2-Dichloroethane-d4 (Surr) 91 101 76- 132 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 12 of 15 <br />