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1 <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 /> ' Moore Twining AssociatesClient Project ID: 9D16002 Method: EPA 5030/8015M,8020 <br /> 2527 Fresno St. Lab Reference Number: 0904145 Instrument 1D: HP-GC1 <br /> Fresno, CA 93721 Sample Description:Water Extracted: 04-29-09 <br /> Attn:Andrea Seruntine Analyst: Jim Phillips Analyzed:04-29-09 <br /> ' Reported: 05-05-09 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Total Xylenes <br /> ' Spike Concentration: 220 5.44 2.72 21.2 4.18 21.5 <br /> Units: ug/L ug/L ug/L ug/L ug/L ug/L <br /> ' LCS Batch#: VW-4299BHP2 VW-4299BHP2 VW-4299BHP2 VW-4299BHP2 VW-4299BHP2 VW-4299BHP2 <br /> LCS % Recovery: 94.3% 106% 87.2% 79.9% 90.2% 86.9% <br /> ' Surrogate Recovery: 105% 83.8% 83.8% 83.8% 83.8% 83.8% <br /> Control Limits: 70-130% 70-130% 70-130% 70-130% 70-130% 70-130% <br /> ' MS/MSD Batch#: VW-4299BHP2 VW-4299BHP2 VW-4299BHP2 VW-4299BHP2 VW-42996HP2 VW-4299BHP2 <br /> Spike Concentration: 220 5.44 2.72 21.2 4.18 21.5 <br /> ' MS% Recovery: 77.5% 102% 84.5% 62.5% 94.2% 89.1% <br /> Surrogate Recovery: 95.1% 92.3% 92.3% 92.3% 92.3% 92.3% <br /> ' MSD%Recovery: 83.2% 103% 87.3% 83.2% 93.1% 90.0% <br /> Surrogate Recovery: 104% 90.7% 90.7% 90.7% 90.7% 90.7% <br /> Relative%Difference: 6.51% 0.327% 2.61% 0.909% 1.07% 0.912% <br /> 1 <br /> Method Blank: ND ND ND ND ND ND <br /> ' Surrogate Recovery: 93.6% 80.2% 80.2% 80.2% 80.2% 80.2% <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 /> 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 /> VJ. <br /> /Labors ryDirectoror <br /> Clan Cone/Laboratory anager <br />