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UOS <br />URS Operating Services, Inc. <br />Data Validation Report <br />Xl. FORil9 6 -DUPLICATE SADIPLE ANALYSIS <br />Duplicate sample anah~sis was performed with every twenty or fewzr samples of a similar matrix, <br />or one pzr sample delivery group (whichever is more fiequent). <br />Yzs X No_ <br />Comments: None. <br />The RPDs were calculated correctly. <br />Yes ~C No NA <br />Comments: None. <br />For sample concentrations Treater than five times the CRDL, RPDs were within a20% (limits of <br />i3~% apply for soil/sediments/tailings samples). <br />r <br />Yes X No_ <br />Comments: None. <br />XII. GFAA QC <br />Duplicate injections w-ere performed on all GFAA samples and [he RSD was within ~ 30%. <br />Yes No NA X <br />Comments: GFAA analyses were not performed on these samples. <br />Analv[ical spikes were performed on all GFAA samples and the pzrcent recovery .vas SS - I I ~%. <br />Yes No N.A <br />Comments: None. <br />i\-ISAs ~~ere analyzed when required and the correlation coefficiznt ~~as > 0.99. <br />Yes No NA X <br />Comments: None. <br />i.6u~~~~~ Inorganic - I I <br />