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QUALITY CONTROL REPORT <br /> i <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 DBI Spike ID Code W-1-596 <br /> Instrument # 4 Surrogate ID Code W-1-493 <br /> Matrix Soil Units mg/K_ <br /> (a} (b) (c) (d) (c) (t) (g) <br /> SAMPLE ACCEPTANCE <br /> SAMPLE DUP LINUIS <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 12 1 91 76 NA NA NA 75- 125 <25 <br /> 8020 Benzene 0 12 96 80 NA NA NA 75- 125 <25 <br /> 8�OLF-Ihyi Benzene 0 12 92 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 - ( Ic-el )/((c+e) x 5) x 100 <br /> (h) G) W (�) <br /> SAMPLE <br /> SAMPLE DUP ACCEPTANCE <br /> SUR. + I + 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-CMorotoluenc PID 1 020 018 90 NA NA 56- 131 <br /> Surrogate % Recovery - J - (i/h) x 100 <br /> Surrogate Dup % Recovery - 1 - (k/"h) x 100 <br /> EMcLar�n Sm <br /> ar� <br /> ENVIRONMENTAL ENGINEERING CORPORATION f«►.�,q <br />