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Fxiseco <br /> _cir.o ee-y- <br /> ��, I Sam le Oeserintian <br /> see the attached Sample Description Information, <br /> The samples were received under chain-of-custody. <br /> II An sis Re nest <br /> The following analytical tests were requested. <br /> ' Lab IDAnalvsis Description Gasoline and BTEX <br /> 051956-1 thru 3 Total Petroleum Hydrocarbons <br /> Organic Lead <br /> -4 thru 5 Total Coliform <br /> I <br /> ITI Ouaiity Control <br /> P,c <br /> 1- <br /> p e., spikes and/or <br /> Pro'ect SBCwascrequesNo project specific QC ( <br /> duplicates) <br /> B. Method Blank Results A method <br /> d blank is a laboratoryrations <br /> ;^ <br /> sample which assesses the degree to which laboratory ope <br /> and procedures cause false-positive analytical results -,'or your <br /> samples. <br /> No target parameters were dlimit in elevelsdnotedkonassociated <br /> the <br /> with your samples at the reporting 9 <br /> Method Blank Report. <br /> Du licate Control atrix <br /> Sampl�l1teA Ohs chs is spikedwell hwithtcertadinmtarget <br /> (blank water, sand or c. ) <br /> nalyzed at approximately 1076 of the sample load in <br /> parameters and a <br /> order to establish methoXourecific samplesoareoonithetattachedDDuplicate <br /> results associatedwit <br /> Control Sample Report. <br /> Accuracy.I.s measured by Percent Recovery as in: <br /> recovery = measured concentration x loo <br /> E (actual concentration) <br /> iI <br /> Precision is measured using duplicate tests by Relative Percent Difference <br /> (RPD) as in: <br /> f v Rpt = % reccvery test I - °/° recover test—?I x 100 <br /> (7° recovery test 1 + % recovery test ZVZ <br /> ai`J1 <br /> M1 ME NINNIM <br /> i <br /> J" <br />