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QUALITY CONTROL REPORT <br /> ' Laboratory Control Sample/Laboratory Control Sample Duplicate <br /> j Method 8020 <br /> Medium Level LP# 6755 <br /> Analyst TB Batch # 921106-0901 <br /> Date Of Analysis 11209/92 _ Spike Sample ID LCS/LCSDS #34 <br /> Column DBI Spike ID Code W-1-616 <br /> p <br /> Instrument # 4 Surrogate ID Code W-1-493 <br /> Matrix Soil Units IngIKy, <br /> (a} (b) (c) (d) (e) ((7 (g) <br /> 1 <br /> J 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 /> r <br /> 8020 Chlorobenzene 0 0 R50 0 046 92 0 043 86 7 75-125 <25 <br /> 8020 Benzene 0 0 050 0 049 98 0 046 92 6 75-125 X25 <br /> 8020 Ethyl Benzene 0 0 050 0 048 96 0 045 90 6 75-125 X25 <br /> Spike Recovery d = ((c-a)/b) x 100 <br /> Spike Duplicate Recovery — f s ((e-a)/b) x 100 <br /> Relative Percent Difference = g = ( Ic-el )/((c+e) x 5) x 100 <br /> (h) (k) (I) <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 020 024 120 022 110 56-131 <br /> Surrogate % Recovery j _ (i/h) x 100 <br /> Surrogate Dup % Recovery 1 (k/h) x 100 <br /> i <br /> A <br /> r n <br /> .` <br /> na <br /> I �l I sm <br /> - <br /> ENVIRONMENTAL ENGINEERING CORPORATION . p"„ <br />