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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate No.2480 Fax: (209)384-1507 <br /> Shop Hazard Solutions, Inc. Client Project Name: DSL Method:EPA 3510C/EPA 8015B <br /> P.O. Box 798 Lab Reference Number:2007021 Instrument ID: HP-Diesel <br /> Turlock,CA 95381 Sample Description:Water Extracted:07-07-20 <br /> Attn:Steve Meier Analyzed:07-07-20 <br /> Reported:07-13-20 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> Spike Concentration: 250 <br /> Units: ug/L <br /> Batch#: TPHDW-7070 <br /> Method Blank: ND <br /> Surrogate%Recovery: 103% <br /> LCSA%Recovery: 121% <br /> Surrogate%Recovery: 102% <br /> LCSB%Recovery: 102% <br /> Surrogate%Recovery: 105% <br /> Control Limits: 60-130% <br /> Relative%Difference: 17.3% <br /> MS/MSD Batch#: TPHDW-7070 <br /> MS% Recovery: NA* <br /> MSD%Recovery: NA* <br /> Relative%Difference: NA* <br /> *Note: Insufficient sample material to prepare MS/MSD samples. LCS samples prepared in duplicate. <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 /> APPROVED BY: <br /> Clavi J. Cone/Laborato Director or <br /> Cassandra J.A.Nanney/Chemist <br />