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1 i <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> ' Certificate#2480 Fax: (209)384-1507 <br /> Geo-Phase Environmental Client Project ID:Cutter Lumber Method:EPA 5030/8015M,8020 <br /> ' 2973 Veneman Ave. B-240 Reference Number:8807 Instrument ID:Var-GC1 <br /> Modesto,CA 95356 Sample Description:Water Extracted: 12-19-05 <br /> Attn:Steve Lankford Analyst: Jim Phillips Analyzed: 12-19-05 <br /> Reported: 12-28-05 <br /> t <br /> QUALITY CONTROL DATA REPORT <br /> I <br /> ' ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Total Xylenes <br /> Spike Concentration: 110 2.16 1.34 7.58 1.82 8.88 <br /> ' Units: uglL ug/L ug/L ug/L ug/L ug/L <br /> LCS Batch#: VW-D195 VW-D195 VW-'D195 VW-D195 VW-D195 VW-0195 <br /> LCS%Recovery: 108% 107% 103% 103% 109% 108% <br /> Surrogate Recovery: 103% 102% 102% 102% 102% 102% <br /> I <br /> ' Control Limits: 70-130% 70-130% 70-130% 70-130% 70-130% 70-130% <br /> MS/MSD Batch#: VW-D195 VW-D195 VW-D195 VW-D195 VW-D195 VW-D195 <br /> ' Spike Concentration: 110 2.16 1.34 7Z8 1.82 8.88 <br /> MS%Recovery: 91.0% 76.0% 91.4% 103% 110% 111% <br /> ' Surrogate Recovery: 106% 107% 107% 107% 107% 107% <br /> MSD%Recovery: 96.2% 80.1% 93.7% 107% 113% 115% <br /> Surrogate Recovery: 111% 111% 111% 111% 111% 111% <br /> Relative%Difference: 5.43% 5.33% 2.42% 3.45% 2.76% 3.86% <br /> ' Method Blank: ND ND ND ND ND ND <br /> Surrogate Recovery: 98.2% 99.4% 99.4% 99.4% 99.4% 99.4% <br /> ' The LCS(Laboratory Check Sample)is a control sample of known,interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents,preparation and analytical methods employed for the samples. The LCS%recovery is used for validation <br /> I ' of sample batch results. Due to matrix effects,the QC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> reject batch results. <br /> 1 <br /> ' APPROVED BY: <br /> James h!I!!p a oratory Director or <br /> Clan J. Cone/ aboratory Manager <br />