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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 <br />Phone: (209) 384-2930 <br />Certificate No. 2480 <br /> Fax: (209) 384-1507 <br />Shop Hazard Solutions, Inc. <br />P.O. Box 798 <br />Turlock, CA 95381 <br />Attn: Steve Meier <br />Client Project Name: Subedar Trucking <br />Lab Reference Number: 2011074 <br />Sample Description: Soil <br />Method: TPH-Diesel <br />Instrument ID: HP-Diesel <br />Extracted: 11-25-20 <br />Analyzed: 11-25-20 <br />Reported: 11-30-20 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE TPH-Diesel <br />Spike Concentration: <br />Units: <br />Batch #: <br />Method Blank: <br />Surrogate % Recovery: <br />LCS % Recovery: <br />Surrogate % Recovery: <br />Control Limits: <br />5.80 <br />mg/kg <br />TPHDS-N250 <br />ND <br />107% <br />108% <br />60-130% <br />MS/MSD Batch #: TPHDS-N250 <br />MS % Recovery: 85.5% <br />Surrogate % Recovery: 98.9% <br />MSD % Recovery: 79.8% <br />Surrogate % Recovery: 102% <br />Relative % Difference: 5.87% <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 atory Director <br />Cassandra J.A. Na ney / Chemist