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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 /> Geological'Technics, Inc. Client Project ID: 1218.2 Method:TPM-Diesel <br /> 1101 7th Street Client Project Name: Elving(Broadway) Instrument ID: }-1P-GC1 <br /> Modesto,CA 95354 Reference Number: 8349 Extracted: 07-15-05 <br /> Attn: Ray KablanDw Sample Description:Soil Analyzed: 07.18-05 <br /> Analyst: Clari Cone Reported: 07-29-05 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> w.» Spike Concentration: 5.00 <br /> Units: mgikg <br /> Batch#: TPHDS-7155 <br /> Method Blank: ND <br /> LCS % Recovery: 123% <br /> Control Limits: 60-130% <br /> MS/MSD Batch#: TPHDS-7155 <br /> MS%Recovery: 77,0% <br /> MSD%Recovery: 73.9% <br /> Relative%Difference: 3.71% <br /> Please Note: <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 /> ANALYST: APPROVED BY: <br /> Glari J. Cone 'Darn' hillips <br /> Laboratory Manager Laboratory Director <br />