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QUALITY CONTROL REPORT <br /> Matrix Spike/Matrix Spike Duplicate <br /> Method 8020 <br /> Medium Level LP# 6743 <br /> Analyst TB Batch # 921106-0901 <br />' Date Of Analysis 11/09/92 Spike Sample ID 6743-1MS <br /> Column DB1 Spike ID Code W-1-596 <br /> Instrument # 4 Surrogate ID Code W-1-493 <br /> Matrix Soil Units mg/Kg <br /> (a) (b) (c) (d) (e) (f) (g) <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 1 12 91 76 NA NA NA 75-125 X25 <br /> 820 Benzene 0 12 96 80 NA NA NA 75-125 X25 <br /> t8'020_J�Ethyl Benzene 0 12 9 2 77 NA NA NA 75-125 <25 <br /> Spike Recovery — d — ((c-a)/b) x 100 <br /> Spike Duplicate Recovery f = ((e-a)/b) x 100 <br /> Relative Percent Difference = g — ( jc-ej )/((c+e) x 5) x 100 <br /> (h) (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 /> 8020 o-Chlorotoluene PID 0 20 018 90 NA NA 56- 131 <br /> Surrogate % Recovery = _ (z/h) x 100 <br /> Surrogate Dup % Recovery 1 (k/h) x 100 <br /> A <br /> La- <br /> cr�nSM <br /> art <br />' ENVIRONMENTAL ENGINEERING CORPORATION 40rftKAed paper <br />