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QUALITY CONTROL REPORT <br /> Matrix Spike/Matrix Spike Duplicate <br /> Method 8020 <br /> Medium Level <br /> LP: 9092 Batch #: 940422-0901 <br /> Date Of Analysis: 04/22/94 Spike Sample ID: 9092-2 MS/MSD <br /> Column: DBWax Spike ID Code: W-1-905 <br /> Instrument #: 6 Surrogate ID Code: W-1-790 <br /> Matrix: Soil Units: ug/Kg <br /> (a) (b) (C) (d) (e) (0 (S) <br /> SAMPLE ACCEPTANCE <br /> SAMPLE DUP. LIMITS <br /> + + SPIKE <br /> EPA SAMPLE SPIKE SPIKE SPIKE SPIKE DUP. <br /> METHOD COMPOUNDS CONC. CONC. CONC. REC.% CONC. REC. % RPD% %REC. RPD <br /> 8020 Chlorobenzene 0 250 175 70 179 72 2 60- 128 <25 <br /> 8020 Benzene 0 250 108 43a 120 48a 10 70- 124 ±<28020 Ethyl Benzene 0 250 I80 72 188 75 4 67- 128 <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) 0) 0) (k) (1) <br /> SAMPLE <br /> SAMPLE DUP. ACCEPTANCE <br /> SUR + + SUR SUR.DUP. LIMITS <br /> EPA SURROGATE SPIKE SUR.SPIKE SUR. SPIKE RECOVERY <br /> METHOD COMPOUNDS DET. CONC. CONC. REC.% CONC. % %REC. <br /> 807A o-Chlorotoluene L PID 200 136 68 139 70 46- 181 <br /> Surrogate % Recovery = j = (i/h) x 100 <br /> Surrogate Dup % Recovery = 1 = (k/h) x 100 <br /> a Matrix spike and/or matrix spike duplicate recoveries are beyond advisory acceptance limits; <br /> however, the laboratory control sample data are acceptable. <br /> MBT Environmental <br /> Laboratories <br />