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Quality Control Results <br /> Client TRC Solutions Job Number 720-1604-1 <br /> Laboratory Control/ Method 8260B <br /> Laboratory Control Duplicate Recovery Report - Batch 720-5187 Preparation 50308 <br /> LCS Lab Sample ICLCS 720-5187112 Analysis Batch 720-5187 Instrument ID Saturn 3900B <br /> Client Matrix Water Prep Batch NIA Lab File ID c lsatumwsldatM20060210. <br /> Dilution 1 0 Units ug/L Initial Weight/Volume 10 mL <br /> Date Analyzed 02/01/2006 1846 Final Weight/Volume 10 mL <br /> Date Prepared 02/01/2006 1846 <br /> LCSD Lab Sample ICLCSD 720-5187111 Analysis Batch 720-5187 Instrument ID Saturn 39006 <br /> Client Matrix Water Prep Batch NIA Lab File ID c lsatumwsldatM200602102C <br /> Dilution 1 0 Units ug/L Initial WeightfVolume 10 mL <br /> Date Analyzed 02/01/2006 1912 Final Weight/Volume 10 mL <br /> Date Prepared 02/01/2006 1912 <br /> % Rec <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD QuA <br /> Benzene 94 97 69 - 129 3 25 <br /> MTBE 98 94 65 - 165 4 25 <br /> Toluene 92 94 70 - 130 3 25 s <br /> Surrogate LCS % Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8 92 95 77 - 121 <br /> 1,2-Dichloroethane-l4 82 80 73 - 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results <br /> STL San Francisco Page 22 of 24 <br />