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NORTH <br /> CREEK <br /> - -ANALYTICAL <br /> 18939 120th Avenue N E,Sude 101 -Bothell,WA 98011.2569 <br /> Phone(206)481-9200•FAX(206)485-2992 <br /> Steffen 79sm <br /> Kirsten Client Project ID Diamond Lumber�32504 22 Analyst M Essig <br /> 15311 Nt Method EPA 5030/8020 K.Wilke <br /> Redmo2 Sample Matrix- Water <br /> Attentioleger Units.erg/L Analyzed Apr 20, 1992OC Sam le# 204-0413 Re rted A r 29, 1992���`:a <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene benzene Xylenes <br /> Sample Conc.: N D N D N D N D <br /> ' Spike Conc. <br /> Added: 50 50 50 150 <br /> Conc. Matrix <br /> obSpike- 52 42 48 134 <br /> Matrix Spike <br /> % Recovery: 104 84 96 89 <br /> Conc. Matrix <br /> Spike Dup : 50 44 so 142 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 100 88 100 95 <br /> Relative <br /> % Difference- 39 47 41 58 <br /> i <br /> I' <br /> CREEK ANALYTICAL Inc %Recovery Conc of tui S -Cans of Sample x too <br /> Spike Conc Added <br /> Relative%Difference Conc of MS -Conc ofMSD x 100 <br /> kH <br /> ocanour (Conc of M$ + Conc of M S D) 2 <br /> J1boratory Director 2040434 SRK <3> <br />