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A NORTH <br /> ,ACREEK <br /> ANALYTICAL <br /> 18939 1201h Avenue N.E., Suite 101 - Bothell,WA 98011-2569 <br /> Phone(206)481-9200•FAX(206)485-2992 <br /> .. .. ...:.....:.. ,. , : �. ?�'- • . »$osiotzd:�'o:: :. ...�... .:::: •. ,kstar,:e�;a�'�::ns> •'. ... .: :�L <br /> Steffen Robertson&Kirsten Client Project ID: Diamond Lumber-LODI Analyst : M. Essig <br /> 15311 NE 90th Street Method : EPA 7421 , <br /> Redmond,WA 98052 Sample Matrbc: Water Digested: Dec 3, 1991 <br /> Attention: Dave Schwleger llrsits : �g/L Analyzed: Dec 3, 1991 fil <br /> QC Sam !e # 112 Re rted• Dec 4, 99 1 <br /> •a,+x,...v.W"S. �P.'! .. .?'',nr oraaa»e;:arr y,_� y. "9.'Y+: .rCfr..".�yr(f'...Pa'! s. v""" <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Pb <br /> Sample Cone.: 78 <br /> ' Spike Cone. <br /> Added: 30 <br /> Cone. Matrix <br /> Spike: 110 <br /> Matrix Spike <br /> ' % Recovery: 107 <br /> ' Conc. Matrix <br /> Spike Dup.: 110 <br /> ' Matrix Spike <br /> Duplicate <br /> % Recovery: 107 <br /> Relative <br /> % Difference: 0 <br /> CREEK ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x i00 <br /> t Cocanour (Conc,of M.S. + Conc.of M.S.D.) 2 <br /> 'Laboratory Director 1111234.SRK <4> <br />