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QUALITY CONTROL REPORT <br /> Laboratory Control Sample <br /> Metals <br /> LP: 11439 Instrument #: PS200 <br /> Date of Analysis: 04102/95 Spike Sample ID: LCSS <br /> Date of Digestion: 04/02/95 Spike ID Code: W4-9219 <br /> Batch #: 950402-2201 Matrix: Soil Units: mg/Kg <br /> (a) (b) (C) (d) (C) (0 (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 0 0.175 0.177 101 NA NA NA 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 /> MBT Environmental "'I'C Master Builders Technologies <br /> Laboratories ��I'�� <br /> (CN11439) <br />