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QUALITY CONTROL REPORT <br /> Matrix Spike/Matrix Spike Duplicate <br /> Metals <br /> LP: 11439 Instrument #: PS200 <br /> Date of Analysis : 04/02/95 Spike Sample ID: 11439-1 MS/MSD <br /> Date of Digestion: 04/02/95 Spike ID Code : W4-9219 <br /> Batch #: 950402-2201 Matrix: Soil Units: mgt <br /> (a) (b) (c) (d) (e) (f) (g) <br /> SAMPLE <br /> SAMPLE DUP. ACCEPTANCE <br /> + + SPIKE LIMITS <br /> SAMPLE SPIKE SPIKE SPIKE SPIKE DUP. RPD <br /> METALS CONC. CONC. CONC. REC.% CONC REC.% % REC% RPD <br /> Hg 10 1 0.175 1 0.324 185° 0.164 94 66b 75- 125 <20 <br /> Spike Recovery — d — ((c-a)/b) x 100 <br /> Spike Duplicate Recovery — f — ( (e-a)/b) x 100 <br /> Relative Percent Difference — g — ( ic-el )/( (c+e) x . 5) x 100 <br /> ° Matrix spike recovery is beyond advisory acceptance limits; however, the laboratory control <br /> sample data are acceptable. <br /> b Matrix spike/matrix spike duplicate RPD is beyond advisory acceptance limits; however, the <br /> laboratory control sample data are acceptable. <br /> MBT Environmental f I"" NlLister Builders Technolo p.;, <br /> Laboratories ��"�� <br /> (CN11439) <br />