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�-n w coy <br /> � fir` +� �p,� <br /> `.,f � 4• `+'11J�f ^y�'' ,, '�d ,A t` 1 r"h• i5'YfP E -rrmv.�-T 7s; <br /> �Iti!, R- ^'..:',yY. <br /> ^ - �y'�^r•.r<n'°y. *r'*.li*'S.,^.^*n+•,-+..r,; '' ...'. 7_ '�' ':L•Ki-� yk� a ..az a RsN.:rr` ��.,-r�'. h} y� "r �' s;� [k,y{ ,,uk'„`tutil. <br /> t7; 'f••` .F� R.- :s.r x(ir r r-F^5 e '� t�j''.^' a +}C�';,*,24 � .,,�rrm <br /> �, � S f � •Il � n "� . ;T�o+-1bS'.,-/S-'!rv•__'f-e-lyir. d�jv+. �' t�f,y� s`*7 <br />�,! <br /> .:A <br /> M Yr y <br /> 4 <br /> r�r <br /> r) 4'� <br /> SNS <br /> ' <br /> yrl.17 <br /> 7. r,�j QBALITY Cp1dT;i.0L 1L£P4ET- <br /> a Z' HEl'iiol'i BLANK aSSULTS: A mcChov blank (M6) Jr u laboratory benarati-d snmplr. tree <br /> +g-ha of uny contamination. The method blank assassos the del;reo to which Cha <br /> r laboratory oneracions and procedures enure false-ponir-ive analyticsal,reyult. £ur <br />) ' <br /> yanY samples. The mntklod binr:k Yesulcs as:;oe3¢Ced with your 4amplcs :l re <br /> Y• attached. <br /> LABORATORY CONTROL SPIKES <br /> a <br /> ]` The LCS Program: <br /> .1 <br /> 't The lal}arscory rear-rnl spike is ;_ wk:7.1 characterized snatrLx (orl;:u+ic Ilul'e <br /> -) type lI for water snmplos and conramicati.on frac sand for nail sumpius) <br /> _ which is spiked wltl, eartain target par:+metei: arse) analy::cd in duplicate• <br />_^�.Y•`t: aC approximarely LO2 of the sample load in urdar to ¢sure the accuracy <br /> N .ri - - and precision of the analytical method. Tha rrsulc.s of the l:aborulory <br /> ( � control ::pike asr+or-jatcd with your snmplos erre ai:t'ached. <br /> � .. Accuracy is measured using percent roaovery, i.e.-. <br /> ,_7Lr. _ (measured cnncentration) <br /> F '' Percen[ Recovery — ------------------------ x 100 <br /> (accu:71 concennraciorr) <br /> 4.r <br /> Preclslon is measurcci usi.ig the tel percent difference (RPB) frau+ <br /> duplicate testas, 1 <br /> e Recovery u€ Snli e(i) - 8 Recovery of Sp1ke ( ) <br /> RPD — - ----------- ------ - x ].UD <br /> (I Recovery of Spike(?) + B Recovery of Spike(z) )/2 <br /> Conrral limits for accuracy al,d prvcision ace di Ci:erent for 6Lff1,re17- <br /> rye--hods. They may also vary wlth the dlffereitt :.ample luatrices- They uca <br /> based nn laboratory average hiseorLc;cl dRc. and F"pl`. limf.: which err' <br /> approved by rhe Quallty Assurance Depamn <br /> rtet- McLa[cn Ana1)'c.ac.•1 <br /> Laboratory reanalyzes sample:.: it tho precisLui: or accuracy r.ut U, <br /> acceptance conteul limLts. <br /> McLaren <br /> al, <br />