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M}„sy"�tr"..- � � -., ,z, �� � �, G�� . �.;s,. w .��'��#s�,-I'��* ''�'' t�'��`�5��'2�.”' � �s,• ,,;.�i.-.: "e -'�^sT� .+,. a°. e1 <br /> e` �A'yx���,� _ t'� k"�� �t� .aa � '"f`L r�,,�'r..c",�o;.� �.J.`t �'"""�i :�5. • ,�•,. St s„ ?.�... <br /> t a <br /> QI <br />} <br /> �.Enseco <br /> A Cmnirg Company <br /> I Sample pescri tion <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 /> i . Lab ID Analysis Description <br /> 057016-1, 2 'Total Petroleum Hydrocarbons (Gasoline) and BTEX <br /> a- <br /> III OuaLity Control <br /> A. Project Specific OC. No prDject specific QC (i.e., spikes and/or <br /> duplicates) was requested. I <br /> f'N 1 <br /> B. 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 for your <br /> samples. <br /> No target parameters were detected in the method blanks associated <br /> with your samples at the reporting limit levels noted on the <br /> k.. Method Blank Report. j <br /> C. LaboratorY,Canfrol Samples_- The LC5 Program <br /> i, Duplicate Control Samples,_ A DCS is a well-characterized matrix <br /> (blank water, sand or celite) which is spiked with certain target <br /> ,.a parameters and analyzed at approximately 10% of the sample load in <br /> order to establish method-specific control limits. The DCS i <br /> results associated with your samples are on the attached Duplicate <br /> Control Sample Report. <br /> a Y Accuracy is measured by Percent Recovery as in: <br /> recovery F measured concentration x 100 t <br /> (actual concentration) <br /> Precision is measured using duplicate tests by Relative Perrent Difference <br /> ' (RPD) as in: <br /> RPD a (% recovery test 1 —% recovery test 21 x 100 <br /> i ; (% recovery test I + % recovery test 2)/2 <br /> E <br /> i <br /> r,� <br />