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Phone: (209) 384-2930 <br />Fax: (209) 384-1507 <br />Environmental Testing Services <br />Certificate No. 2480 <br />2333 Shuttle Drive, Atwater, CA 95301 <br />Method: EPA 8015B <br />Instrument ID: HP-Diesel <br />Extracted: 07-01-20 <br />Analyzed: 07-02-20 <br />Reported: 07-07-20 <br />Shop Hazard Solutions, Inc. <br />P.O. Box 798 <br />Turlock, CA 95381 <br />Attn: Steve Meier <br />Client Project Name: GM Expressa <br />Lab Reference Number: 2007014 <br />Sample Description: Soil <br />5.00 <br />mg/kg <br />TPHDS-7010 <br />Spike Concentration: <br />Units: <br />Batch #: <br />97.0% <br />106% <br />TPHDS-7010 <br />99.5% <br />108% <br />2.6% <br />LCSA / LCSB Batch #: <br />LCSA % Recovery: <br />Surrogate % Recovery: <br />LCSB % Recovery: <br />Surrogate % Recovery: <br />Relative % Difference: <br />NA* - See LCSA/LCSB <br />APPROVED BY: <br />CASTLE ANALYTICAL LABORATORY <br />QUALITY CONTROL DATA REPORT <br />ANALYTE TPH-Diesel <br />Method Blank: ND <br />Surrogate % Recovery: 110% <br />LCS % Recovery: NA* <br />Surrogate % Recovery: NA* <br />Control Limits: 60-130 % <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 />Clan J. Cone IL.orat ty Director or <br />Cassandra J.A. annoy / Chemist