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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone: (209) 384-2930 <br /> Fax: (209) 384-1507 <br /> Certificate No. 2480 <br /> Technicon Engineering Client Project ID: 180321 Method: TPH-Diesel <br /> 4539 N. Brawley Ave. Suite 108 Lab Reference Number: 1805035 instrument ID: HP-GC'I <br /> Fresno, CA 93722 Sample Description: Soil Extracted: 05-07-18 <br /> Attn: Steve Curta Analyzed: 05-08-18 <br /> Reported: 05-16-18 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br /> Spike Concentration: 5.00 <br /> Units: mg/kg <br /> Batch #: TPHDS-5078B <br /> Method Blank: ND <br /> Surrogate % Recovery: 91 .4% <br /> LCS % Recovery: See LCSA / LCSB <br /> Surrogate % Recovery: <br /> Control Limits: 60-130 % <br /> LSCA / LCSB Batch #: TPHDS-50788 <br /> LCSA % Recovery: 104% <br /> Surrogate % Recovery: 96.7% <br /> LSCB % Recovery: 101 % <br /> Surrogate % Recovery: 92.6% <br /> Relative % Difference: 2.87% <br /> Please Note: <br /> The LCS (Laboratory Check Sample) is a control sample of known, interferent free matrix that is:TheLCS <br /> th representative analytes an <br /> analyzed using the same reagents, preparation and analytical methods employed for the samples. % recovery is used forvalidation <br /> of sample batch results. Due to matrix effects, the QC limits and recoveries for MS/MSUs are advind are not used to accept or <br /> reject batch results. <br /> T <br /> APPROVED BY: <br /> JamesC. Ph s / La1bOo <br /> mtory Director or <br /> arI <br /> C/ i Laboratory <br /> Manager <br />