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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> Metals LP# 7b39 <br /> Analyst SP Instrument # PE5100 <br /> Date of Analysis 06/16/93 Spike Sample ID LCSW/LCSDW <br /> Date of Digestion 06/09Z93 Spike ID Code W4-3586 <br /> Batch # 930609-1302 Matrix Water Units ug/L <br />� (a) (b) (C) (d) (C) <br /> SAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> + I + SPIKE LIMITS <br /> SAMPLE SPIKE SPIKE SPIKE SPIKE DUP RPD <br /> METALS CONC CONC CONC REG% CONC REG% % REC% RPD <br /> Pb 0 200 1 218 1 109 1209 1 104 1 5 80- 120 C20 <br /> i <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 )/((G+e) x 5) x 100 <br /> MBT Environmental Cr[ I �, f'--IS e 3U - <br /> Laboratories L t.L4 <br /> (DC2-CN7639B) <br />