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Quality Control Results <br /> Client Severn Trent Laboratories, Inc .lob Number 720-1810-1 <br /> Method Blank-Batch: 720-5532 Method 8015B <br /> Preparation. 50308 <br /> Lab Sample ID MB 720-553211 Analysis Batch 720-5532 instrument ID PIDIFID Gas/Stex <br /> Client Matrix Water Prep Batch NIA Lab File ID N/A <br /> Dilution 10 Units ug/L Initial WeightfVolume 10 ml- <br /> Date Analyzed 02/13/2006 1035 Final Weight/Volume 10 mL <br />�i Date Prepared 02/13/2006 1035 Injection Volume <br /> Column ID PRIMARY <br /> i Analyte Result Qual RL <br /> 6asoi7ne Range Organics(GRO)-C5-C12 ND 50 <br /> Surrogate_ _ %Rec Acceptance Limits <br /> 4-Bromofluorobenzene 110 50-150 <br /> Laboratory Control Sample-Batch. 720-5532 Method: 80158 <br /> Preparation. 60308 <br /> Lab Sample ID LCS 720-5532!2 Analysis Batch 720-5532 Instrument ID PID/FID Gas/Btex <br /> Client Matrix Water Prep Batch NIA Lab File ID N/A <br /> Dilution 10 Units ug/L Initial Weight/Volume 10 mL <br /> Date Analyzed 02/13/2006 1147 Final Weight/Volume 10 ml- <br /> Date <br /> LDate Prepared 02/13/2006 1147 Injection Volume <br /> Column ID PRIMARY <br /> Analyte Spike Amount Result %Rec Limit Qual <br /> iGasoline Range Organics(GRO)-C5-C12 250 280 110 75-125 - <br /> Surrogate °i6 Rec _ Acceptance LimitsT�^�-J <br /> 4-Bromofluorobenzene 105 50-160 <br /> Calculations are performed before rounding to avoid round-oft errors in calculated results <br /> STL San Francisco Page 16 of 19 <br /> G6B060189 STL Sacramento(916)373-6600 39 of 42 <br />