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UOS~ <br />URS Oper.:iting Services, Inc <br />The percent recoveries (%R) were calculated correctly. <br />Data Validation Report <br />P,ecovery (SSR - SR) X 100 SSR = spikeii sample result <br />SA SR =sample result <br />S:\ =spike added <br />Yes X No <br />Continents: None. <br />Spike recoveries were within the laboratory limits (an exception is granted where [he sample <br />corcenn'ation is four times the spike concentration). <br />Ye:>_ No X <br />Continents: The follow'ingtablelis[sthespikerecoveriesoutsidecontrollimits,ma[rix,samples <br />affected, and data qualifiers: j <br />Elemect Spil:c Recover~~ i\latric Samples Affected j Qualifiers <br />Lead - 134.0 water BAS, RSR-O6A. RSR-06B ~ J -positive <br />The spike recovery for cadmium exceeded the QC lii[its of 7~-I 2~% at I?6.6%. <br />No action was required because thzre were no positivie results for cadmium in the <br />associated samples. <br />\. FORil1 SB -POST DIGEST SPIKE RECOVERY <br />A host-digest spike was performed for [hose elements that did not meet the specified criteria (i.e., <br />pre~disestion/pre-distillation sp.ke recovery falls outside of control limits and sample result is less <br />than four times the spike amouct added, exception: Ag. Hg). ~ <br />Ye<;_ No X NA <br />Comments: The laboratory performed a post digestion spike f r cadmium and lead. The <br />recovery for lead at 131.2% exceeded the 7~-12~% c%iteria. No action is required <br />because post spike results do not affect sample qualification. <br />I <br />~6~'_'_'_m I Inur panic- 10 <br />