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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone: (209)384-2930 <br /> Certificate#2480 Fax: (209)384-1507 <br /> Shop Hazard Solutions, Inc. Client Project Name:TSB Trucking Method: EPA 5030/8021B <br /> P.O. Box 798 Lab Reference Number: 2010015 Instrument ID:VAR-GC1 <br /> Turlock, CA 95381 Sample Description: Soil Extracted: 10-07-20 <br /> Attn: Steve Meier Analyzed: 10-07-20 <br /> Reported: 10-08-20 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethylbenzene Total Xylenes <br /> Spike Concentration: 2.42 35.1 9.47 49.3 <br /> Units: ug/kg ug/kg ug/kg ug/kg <br /> LCS Batch#: VS-0070 VS-0070 VS-0070 VS-0070 <br /> LCS %Recovery: 82.6% 81.4% 89.7% 91.6% <br /> Surrogate Recovery: 95.5% 95.5% 95.5% 95.5% <br /> Control Limits: 70-130% 70-130% 70-130% 70-130% <br /> MS/MSD Batch#: VS-0070 VS-0070 VS-0070 VS-0070 <br /> MS%Recovery: 78.5% 84.6% 91.9% 92.0% <br /> Surrogate Recovery: 95.4% 95.4% 95.4% 95.4% <br /> MSD%Recovery: 78.5% 84.0% 92.9% 93.4% <br /> Surrogate Recovery: 95.6% 95.6% 95.6% 95.6% <br /> Relative%Difference: 0.0% 0.6% 1.1% 1.4% <br /> Method Blank : ND ND ND ND <br /> Surrogate Recovery: 103% 103% 103% 103% <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 /> Clavi J. Cone/Laoratory Director <br /> Cassandra J.A. Atanney/Chemist <br />