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QUALITY CONTROL REPORT <br /> Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> ethod 602 (Modified) <br /> F <br /> LP# 8051 <br /> Analyst TL Spike Sample ID LCS/LCSDW-50 <br /> Date Of Analysis 030/93 Spike ID Code W-1-733 <br /> Column DBI Surrogate ID Code W-1-740 <br />' Instrument # 4 Matrix Water Units u /g L <br /> (a) (b) (e) (d) (e) (f) (g) <br /> SAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> + + SPIKE LIMITS <br /> EPA SAMPLE SPIKE SPIKE SPIKE SPIKE DUP <br /> METHOD COMPOUNDS CONC CONC CONC REC% CONC REC % RPD% % REC RPD <br /> 602 Chlorobenzene 0 1 400 456 114 4.57 114 0 69-131 <20 <br /> 602 Benzene 0 400 444 111 469 117 5 72-134 <20 <br /> 632 Ethyl Benzene 0 400 446 112 464 116 4 1 72- 128 c20 <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 />' (h) (k) �1) <br /> SAMPLE <br />' SAMPLE DUP ACCEPTANCE <br /> SUR. + + SUR.DUP LIMITS <br /> t0E-PA <br /> SURROGATE SPIKE SUR SPIKE SUR REC SUR SPIKE RECOVERY <br /> MHOD COMPOUNDS DET CONC CONC % CONC % %REC <br /> 2 a,a,a,Tniluorotoluene PID 400 404 101 401 100 63- 134 <br /> Surrogate % Recovery = J = (i/h) x 100 <br /> Surrogate Dup % Recovery 1 = (k/h) x 100 <br /> MBT Environmental I Mastc r BuilaeYs <br /> Laboratories ' <br /> �� '�� (CN8051) <br />