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i` <br /> i <br /> i Quality Control Results <br /> 4 Client: Secor International, Inc. Job Number: 724-1251-1 <br /> I�I <br /> ` Laboratory Control/ Method: 8260B <br /> Laboratory Control Duplicate Recovery Report- Batch: 720-4278 Preparation: 5030B <br /> LCS Lab Sample ID: LCI S 720-427817 Analysis Batch: 720-4278 Instrument ID: Saturn 39008 <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsaturnwsldata120060110' <br /> Dilution: Units: ug/L Initial WeighWolume: 10 mL <br /> Date Analyzed: 01/10/2006 1000 Final WeightfVolume: 10 mL <br /> Date Prepared: 0',111012006 1000 <br /> I <br /> LCSD Lab Sample ID:1I1LCSD 720-427816 Analysis Batch: 720-4278 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsaturnwsldata12006011011 <br /> Dilution: 1110 Units:ug/L Initial WeightfVolume: 10 mL <br /> Date Analyzed: 01/10/2006 0840 Final Weight/Volume: 10 mL <br /> Date Prepared: 01/10/2006 0840 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene. .m� ��� , �,._.w 94 102 � 69- 129 8' 25 <br /> MTBE 95 107 65-165 11 25 <br /> Toluene 91 100 70-130 9 25 <br /> Surrogate LCS% Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8 86 85 77-121 <br /> 1,2-Dichloroethane-d4 89 90 73- 130 <br /> 1 <br /> �i <br /> iI <br /> I' <br /> i <br /> Calculations are perfolrmed before rounding to avoid round-off errors in calculated results. <br /> i <br /> STL San Francisco Page 9 of 12 <br /> I <br /> I <br />