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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone: (209) 384-2930 <br /> Certificate No. 2480 Fax: (209) 3841507 <br /> Tuff Boy Sales , Inc. Client Project ID: Waste Testing Method : TPH-Diesel <br /> 5151 Almondwood Dr. Lab Reference Number: 1810076 Instrument ID: HP-GCI <br /> Manteca, CA 95337 Sample Description: Wood Chips Extracted: 10-23-18 <br /> Attn: Josh Harris Analyzed: 10-2418 <br /> Reported: 10-30-18 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> Spike Concentration : 5.00 <br /> Units: mg/kg <br /> Batch #: TPHDS-0238 <br /> Method Blank: ND <br /> Surrogate % Recovery: 85A% <br /> LCS % Recovery: 112% <br /> Surrogate % Recovery: 82.9% <br /> Control Limits: 60A 30 % <br /> MS/MSD Batch #: TPHD&0238 <br /> MS % Recovery: 99 .4% <br /> Surrogate % Recovery: 73.3% <br /> MSD % Recovery: 108% <br /> Surrogate % Recovery: 79.3% <br /> Relative % Difference: 7 .49% <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 /> James C. Phillips / L oratory Director or <br /> Clad J. Cone / Lab tory Manager <br />