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Quality Control Results <br /> Client Philips Environmental Services Corp Job Number 720-450-1 <br /> Laboratory Control] Method 8260B <br /> Laboratory Control Duplicate Recovery Report-Batch 720-2007 Preparation 5030E <br /> LCS Lab Sample ID LCS 720-2007117 Analysis Batch 720-2007 Instrument ID Varian 3900C <br /> Client Matrix Water Prep Batch NIA Lab File ID c lsatumwsldata120051111 <br /> Dilution 10 Units uglL Initial Weight/Volume 10 mL <br /> Date Analyzed 11/16/2005 0712 Final Weight/Volume 10 mL <br /> Date Prepared 11/16/2005 0712 <br /> I LCSD Lab Sample ID LCSD 720-2007116 Analysis Batch 720-2007 Instrument ID Varian 3900C <br /> Client Matrix Water Prep Batch NIA Lab File ID c lsaturnwsldata1200511\111 <br /> Dilution 10 Units ug/L Initial Weight/Volume 10 mL <br /> Date Analyzed 11/16/2005 0739 Final Weight/Volume 10 mL <br /> Date Prepared 11/16/2005 0739 <br /> % Rec <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 96 102 69- 129 7 25 <br /> MTBE 89 95 65- 165 6 25 <br /> Toluene 96 98 70- 130 3 25 <br /> Surrogate LCS%Rec LCSD% Rec Acceptance Limits <br /> Toluene-d8 111 108 77-121 <br /> 1,2-Dichloroethane-d4 102 107 73-130 <br /> i <br /> 1 <br /> I <br /> i <br /> • <br /> Calculations are performed before rounding to avoid round-off errors in calculated results <br /> STL San Francisco Page 22 of 34 <br />