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One field dtiplicate saniple will be collected simultaneously with a standard sample ftorn <br />the saine source under identical conditions into a separate sample container, The <br />rlk�rpart in order to assesslaboratory <br />duplicated saniple is t,eated Independently ol' its Cou. <br />perf'ormarice through conipari,soti ofthe result",,. <br />The duplicate samples gill he collected at a. random location that dernonsirates elevated <br />levels of metals based on field screeninc-, results. SUITWiCtlt soil will be collected fi,orn the <br />sample location to prepare as pri.m.ary and duplicate sample froin. as s1rigle batch of soil. <br />The soil sample will be homogenized with as tro\,x;cl in a sample-dedicaied one-i,11allon <br />disposable pail or as decontarainated, stainless steel rnlNinil), bowl, and then Irarisferred, to <br />each sample container for both regular and duplicate sample anal-vscs. <br />3.12 Laboratory Quality Controll <br />I'lie analytical laboratory will perfiorin. Quali.ty COnLrOl The QC' will include project <br />specific QCmethod. blank NSURS1, laboratory control. spike, and matrix spike results. <br />1. Project Specific QC` -- No pro.ject specific QC' has been requested by the C,'IWMB <br />M <br />ethod Iflank Results .. A method blank is a hibor— <br />atorvencrated sample that assesses <br />the de--ree to which laboratory operations and procedUrCS CaUSC fial.SC-POsitive arialytical <br />results fbi, the CIWM.13 samples. The me.thod, blank results associated Nvi.th the samples <br />rill be included with the atialyLical results. <br />3. Laboratory Control Spike - A L.aborator-y- Control Spike tlC'S) is a sample that is spiked <br />. . .............. ---- . ... . .......... . .......... . . -- .... Spike -- .... . ..... <br />,,Nith knot ,v arialyte concentrations, and analyzed at approxiniaiely 10 percent ofilie <br />sample ](.)ad in order to establish inethod-specific control hinitS. The result,., <br />associate with C. samples will be attached on the ,C'S and LC S Dupticated <br />Analysis Report. <br />4. Matrix Spike ReSUItS A matrix spike is as sample that is spiked with known analyse <br />concentrations arid analyzed at approximately 10 percent ofthe sample load in order to <br />establish inclhod-specific control hinils. The matrix spike results associated with <br />CI WMB samples will be attached oii the Matrix Spike and Matrix Spike I.Duplicatc, <br />Analysis Report. <br />Accuracv ... Accurac-v will be me, sured b�I , percent recovery as defined by: <br />.............. - <br />(III.CaSUrCd concentration) X 100 <br />(actual concentration) <br />14 <br />