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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive. Atwater, CA 95301 <br /> <br />Phone: (209) 384-293C <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: Flex Intermodal <br />Lab Reference Number: 2104037 <br />Sample Description: Soil <br />Method: EPA 8015B <br />Instrument ID: HP-Diesel <br />Extracted: 04-09-21 <br />Analyzed: 04-12-21 <br />Reported: 04-13-21 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE TPH-Diesel <br />Spike Concentration: <br />Units: <br />Batch #: <br />Method Blank: <br />Surrogate °A Recovery: <br />LCS % Recovery. <br />Surrogate % Recovery: <br />Control Limits. <br />5.00 <br />mg/kg <br />TPHDS-4091 <br />ND <br />97.1% <br />See LCSA / LCSB <br />60-130 % <br />LCSA / LCSB Batch #: <br />LCSA `)/0 Recovery: <br />Surrogate % Recovery: <br />LCSB % Recovery. <br />Surrogate % Recovery: <br />Relative % Difference: <br />TPHDS-4091 <br />99.3% <br />105% <br />98.2% <br />105% <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 - L • oratory Director