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i164 e�� 0113 <br /> x. „r �� Mme• � .kyr - _�.. � ;ax � N 5 � � � .z, � �. � s <br /> �;Enseco <br /> A Comms Company <br /> �S <br /> I Sam le Descr tD i,nn <br /> �•� See the attached Sample Description Information. <br /> p-� The samples were received under chain-of-custody. <br /> II Anal si a ue t <br /> ! ' <br /> in analytical tests were requested. <br /> .The following <br /> nal s scr tion <br /> I Lab Total petroleum Hydrocarbons (Gasoline) and BTEX <br /> 057016-1, 2 <br /> i4 <br /> III ual t Control C e,, spikes and/or <br /> Pro ec S eCwacrequestedproject specific Q <br /> dupl'c } s <br /> B.Mao I Method Blank Results. A method blank is alaboratory-generated <br /> sample which assessf he dpositive analytical e to which rresults atory pfor tyour r , <br /> and procedures cause <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 /> Method Blank Report. � <br /> C. Laboratar, Control Sam les - The LCS Program , <br /> atrix <br /> pu 1icate Control Sam Celite} whichisspikedhwiahtcertadinmtarget t <br /> (blank water, sand or e <br /> parameters and analyzed at approximately 10% of the sample load in <br /> raethod-specific control <br /> ltheattac <br /> results associated <br /> t <br /> sh hed Duplicate <br /> order to establi 'i <br /> with Your samples a <br /> Control Sample Report. <br /> Accuracy is measured by Percent Recovery as in: � <br /> SP measured concentratiani x 104 <br /> _F <br /> recovery = {actual concentration) <br /> duplicate tests by Relative Percent Difference <br /> Precision is measured using ! <br /> (RPD) as in: <br /> RPD % recover test 1 - % recover+r test 21 x 100 <br /> i. <br /> (% recovery test I + % recovery test 2}/2 <br /> 4 <br />