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QUALITY CONTROL REPORT <br /> I � <br /> Laboratory Control Sample/Laboratory Control Sample 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 LC5 LCSDS ##34 <br /> Column DB1 Spike ID Code W-1-616 <br /> Instrument # 4 Surrogate ID Code W-1-493 <br /> Matrix Soil Units, m K <br /> (a) (b) (c) (d) (e) { (8) <br /> SAMPLE ACCEPTANCE <br /> SAMPLE DUP LIMA <br /> + + SPIKE <br /> EPA SAMPLE SPIKE SPIKE SPIKE SPIKE DUP <br /> METHOD COMPOUNDS CONC CONC CONC REC% CONC REC % RPD% % REC RPD <br /> 8020 Chlorohcnzcnc 0 0 050 0 046 92 0 043 86 7 75- 125 <25 <br /> 6020 Benzene 0 0 050 0 049 98 0 046 92 6 75- 125 <25 <br /> =8020E¢hvl Benzene 0 0 050 0 048 96 0 045 90 6 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 - ( Ic-el )/((c+e) x 5) x 100 <br /> (h) (1) (k) (I) <br /> SAM PLE <br /> SAMPLE DUP ACCEPTANCE <br /> SUR. + + SUR. SUR. DUP LIMITS <br /> EPA SURROGATE SPIKE SUR SPIKE SUR. SPIKE RECOVERY <br /> METHOD COMPOUNDS DEI' CONC CONC REC % CONC % % REC <br /> 8030 o-Chlorocolucne PID 020 1 024 120 0 22 110 56- 131 <br /> Surrogate Recovery - - (x/h) x 100 <br /> Surrogate Dup Recovery - 1 - (k/h) x 100 <br /> T <br /> LaI L+l I sm <br /> �r� <br /> ENVIRONMENTAL ENGINEERING CORPORATION 40 <br />