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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 <br /> Phone: (209) 384-2930 <br />Certificate #2480 <br /> Fax: (209) 384-1507 <br />Shop Hazard Solutions, Inc. <br />P 0. 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 5030/8021B <br />Instrument ID: VAR-GC <br />Extracted: 04-09-21 <br />Analyzed: 04-09-21 <br />Reported: 04-13-21 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE <br /> Benzene Toluene Ethylbenzene Total Xylenes <br />Spike Concentration: 0.130 <br /> <br />2 11 <br /> <br />0.586 <br /> 3.16 <br />Units. mg/kg mg/kg mg/kg mg/kg <br />LCS Batch #: VS-4091 ME VS-4091 ME VS-4091 ME VS-4091 ME <br />LCS % Recovery: <br /> NA* NA" NA* NA* <br />Surrogate Recovery: NA* NA* NA* NA* <br />Control Limits: 70-130% 70-130% <br /> <br />70-130% 70-130% <br />LCSA / LCSB Batch #: <br />LCSA % Recovery: <br />Surrogate Recovery: <br />LCSB % Recovery: <br />Surrogate Recovery: <br />Relative % Difference: <br />Method Blank : <br />Surrogate Recovery: <br />VS-4091 ME VS-4091 ME VS-4091 ME VS-4091 ME <br />95.7% 97.6% 100% 95,9% <br />99,4% 99.4% 99.4% 99.4% <br />88.8% 99.4% 101% 97.8% <br />96.8% 96.8% 96.8% 96.8% <br />7.5% 1.9% 0.6% 1.9% <br />ND ND ND ND <br />129% 129% 129% 129% <br />NA* - See LCSA/LCSB <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 a oratory Director