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p w — WAMOM <br /> EZ <br /> T <br />�5 <br /> ..Enseco <br /> t'r A Cmrsing Company <br /> I Sample Description <br /> See the attached Sample Description Information. ' <br /> The samples were received under chain-of-custody. <br /> 11 Analysis-Request <br /> The following analytical tests were requested: <br /> Lab ID Analysis Description <br /> 059063-1,2 Total Petroleum Hydrocarbons <br /> Total Petroleum Hydrocarbons (Gasoline) and BTEX <br /> III quality Control <br /> A. Pro eci: SeecificfIC. No project specific QC (i:e:, spikes and/or <br /> duplicates) was requested: <br /> 8: Method Blank Results, A method blank is a laboratory-generated <br /> sample which assesses the degree.to Which laboratory operations <br /> and procedures cause false-positive analytical results €or YdUr <br /> samples. <br /> No target parameters dere detected in the method blanks associated <br /> with your sarnpl,es at the reporting limit levels• noted on the <br /> attached Method Blank Report: <br /> C: Laboratpri Control Sam1p es - The LO Program <br /> DUO icate Control SamUl_e94 A us is a well=characterized matrix <br /> (blank water, ,sand or celite) which is spiked with certain target <br /> � . parameters and analyzed at approximately In of the sample load in <br /> order to establish method-specific control limits, The DCS <br /> results associated with your samples are on tiie attached Duplicate <br /> Colitrol Sample Report, <br /> Siriale Control 5amles: An SCS consists of a control matrix that <br /> is spiked with surrogate compounds appropriate to the method being <br /> used: In cafes where no surrogate is available, (e:g: lnatals at <br /> conventional analyses) a single control sample identical to the <br /> DCS serves as the control sample: An SCS is prepared for each <br /> sample lot: Accuracy is calculated identically to the DCS, The <br /> fi SCS results associated With your samples are on the attached <br /> F, <br /> Single Coni:rol Sample Report. <br /> Accuracy is measured by Percent Recovery as ini <br /> % recovery (measured concentration!. x 100 <br /> , ;"° (actual concentration) <br />