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Cassandra J.A. Ajnney / Chemist <br />APPROVED BY: '4114.1 <br />Clan J. Cone / Lab ratory Director <br />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.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: EPA 5030/8021B <br />Instrument ID: VAR-GC1 <br />Extracted: 11-24-20 <br />Analyzed: 11-24-20 <br />Reported: 11-30-20 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE <br />Benzene Toluene Ethylbenzene Total Xylenes <br />Spike Concentration: 0.130 <br /> 2.11 <br /> <br />0.586 <br /> <br />3.16 <br />Units: mg/kg mg/kg mg/kg mg/kg <br />LCS Batch #. VS-N240 ME VS-N240 ME <br /> <br />VS-N240 ME VS-N240 ME <br />LCS °A Recovery: NA* <br /> <br />NA* <br /> <br />NA* NA* <br />Surrogate Recovery: NA* <br /> <br />NA* <br /> <br />NA* <br /> <br />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 />NA* - See LCSA/LCSB <br />VS-N240 ME VS-N240 ME VS-N240 ME VS-N240 ME <br />103% 101% 103% 102% <br />102% 102% 102% 102% <br />96.6% 99.5% 100% 100% <br />102% 102% 102% 102% <br />6.1% 1.6% 2.4% 1.5% <br />ND ND ND ND <br />108% 108% 108% 108% <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.