Laserfiche WebLink
J.mm <br /> , <br /> a <br /> 1 <br /> •moi <br /> I Sample Description 'w <br /> See the attached Sample Description Information. <br /> The samples were received under chain-of-custody. <br /> II Analysis Re nest <br /> The following analytical tests were requested. <br /> Lab ID Anal sis Descri tion <br /> 057756-1 thru 9 Total Petroleum Hydrocarbons (Gasoline) and BTEX <br /> III ualit Control <br /> A. Pject S ecific C. No project specific QC (i-e., spikes and/or <br /> ro <br /> duplicates) was requested. <br /> B. tl thod 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 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 Blafik Report. <br /> C. Laborator Control Sam les - The LCS Program <br /> Au licate Control Sam les. A DCS is a well-characterized matrix <br /> (blank water, sand or celite) which is spiked with certain target <br /> parameters and analyzed at approximately 10% of the sample load in <br /> order to establish method-specific control limits. The DCS <br /> results associated :lith your samples are on the attached Duplicate <br /> Control Sample Report. <br /> Accuracy is measured by Percent Recovery as in: <br /> % recovery = (measured concentration x 100 <br /> (actual concentration) <br /> precision is measured using duplicate tests by Relative Percent Difference <br /> (RPD) as in: <br /> RPD = (% recovery testrecover test 2 x 100 <br /> (% recovery test I % recovery test 2)/2 <br />