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TOTA . PETROLEUM HYDROCARBON: Diesel <br /> EPA METHOD 8015 ININ19 <br /> MATRIX SPIKE <br /> EST.1698 L A E 0 R A ? o R I E S <br /> QUALITY CONTROL REPORT <br /> Analyzed By: Dara P. VongkhamphalFernando Baguinguito Reviewed By: J. llreno <br /> Date of Extraction:2126/03 Date of Analysis2/27103 <br /> Twining Laboratories, Inc. Run ID Number: TL022703 Sample Matrix:Soil Sample:Sand <br /> Spike ID: WS-1819 <br /> Constituent Matrix Sample Matrix Spike Matrix Spike Matrix Spike Acceptable Matrix Spike Matrix Spike Relative <br /> Concentration Concentration Reco-very Duplicate Percent Percent Duplicate Percent <br /> (nig�`Kg) C__evel (mWKg) Recovery Recovery Recovery Percent Difference <br /> On X0 (ing`Kg) Range {°i,) Recovery <br /> Lem' H€gh <br /> TPI : Diesel O.0 25.0 21.1 21.8 70% 130% 84.4'/0 47.3°4} 3.4% <br /> EXPLANATIONS: <br /> ND Non-Detectable; the target analyte was not found above the detectable limit for reporting purposes(1)LR). <br /> tnglK milligrams per ki lograins,parts per million (ppm)concentration units. <br /> Matrix Sample: The matrix sample is the sample chosen ror use in the matrix spike analyses. <br /> Matrix Spike: A matrix spike is generated by adding the target analyte(s) into the sample noted above. The matrix spike sample is <br /> analyzed exactly like a regular sample,and its purpose is to determine whether the sample matrix has a measurable effect <br /> on precise and accurate analyte detection and quantification, <br /> l <br />