Laserfiche WebLink
4 <br /> L Iseco <br /> I sample Descri tion <br /> See the attached sample Description Information. <br /> The samples were received under chain-of-custody. <br /> I- I Analysis Re uest <br /> The following analytical test was requested. <br /> Lab ID Analysis DescriQtion <br /> 057852-1 thru 12 Total Petroleum Hydrocarbons (Gasoline) and BIL EX <br /> III Quality Control <br /> A. Project 5 ecific C. No project specific QC (i .e., spikes and/or <br /> duplicates) was requested. <br /> B. Method Blank Results. A method blank is a laboratory-gnerates <br /> sample which assesses the degree to which laboratory ope <br /> ratiand procedures cause false-positive analytical results for your <br /> samples. <br /> No target parameters were detected in the method blank associated <br /> with your samples at the reporting limit levels noted on the <br /> attached Method Blank Report. <br /> C. Laborator Control Sam les - The LCS Program <br /> Du licate Control Sam les. A DCS is a well-characterized matrix <br /> (blank water, sand or celite) which is spiked withecertain sample targein <br /> load <br /> parameters and analyzed at approximately lo/ of <br /> order to establish method-specific control limits. The DCS <br /> results associated with your samples are on the attached Duplicate <br /> Control Sample Report. <br /> Accuracy is measured by Percent Recovery as in: <br /> % recovery = irLrieasuredd Concentra-t—JOD <br /> 91 x 100 <br /> (actual concentration) <br /> Precision is measures using duplicate tests by Relative Percent Difference <br /> (RPD) as in: <br /> RPD test 1 - % recover test 2 x 100 <br /> (% recovery test 1 + % recovery test 2)/2 <br /> i <br />