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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:Smart Tech Diesel Repair Method: EPA 8015B <br /> P.O. Box 798 Lab Reference Number:2012075 Instrument ID: HP-Diesel <br /> Turlock,CA 95381 Sample Description:Soil Extracted: 12-23-20 <br /> Attn:Steve Meier Analyzed: 12-24-20 <br /> Reported:01-05-21 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> Spike Concentration: 5.80 <br /> Units: mg/kg <br /> Batch#: TPHDS-D230 <br /> Method Blank: ND <br /> Surrogate%Recovery: 97.2% <br /> LCS%Recovery: 95.9% <br /> Surrogate%Recovery: 107% <br /> Control Limits: 60-130% <br /> MS/MSD Batch#: TPHDS-D230 <br /> MS%Recovery: 83.1% <br /> Surrogate%Recovery: 83.1% <br /> MSD%Recovery: 94.5% <br /> Surrogate%Recovery: 93.7% <br /> Relative%Difference: 12.1% <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 /> APPROVED BY: <br /> Clan J. Cone-Labo tory Director <br />