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CHEMWEST ANALYTICAL LABORATORIES <br /> HALOGENATED VOLATILE ORGANICS <br /> EPA METHOD: 8010 <br /> Quality Control <br /> Client ID: LQCS GC-1 5102 CHEMWEST ID: 9501-QC1 <br /> Date Analyzed: 04/28/92 Matrix : Soil <br /> ' Spike % <br /> Conc. Recovery Recovery <br /> ' <br /> Compound <br /> ------------------(MG/KG) -----g501_MBS--------MBSDRPD <br /> -- - <br /> 1 , 1--Oichloroethane 0 . 30 103% 1100 70 <br /> Chloroform 0. 30 110% 113% 3% <br /> ' Trichloroethene 0 . 30 100% 107% 7% <br /> Bromodichloromethane 0 . 30 97% 103% 6% <br /> Tetrachloroethene 0 . 30 110% 113% 30-,, <br /> Chlarobenzene 0 . 30 93% 97% 4% <br /> -----------------------------------------------------_-------------- <br /> Spike % 0 <br /> ' Conc. Recovery Recovery <br /> Surrogates (MG/KG) 9501-MBS 9501-MBSD <br /> ------ <br /> ------------------------- »-------------------- <br /> Bromochloromethane 10 97% 103% <br /> 1 ortho_Chlorotoluene----------------20 91% 96% <br /> ---------- -------- ---------- <br /> 1 <br /> 1 <br /> ' Date Reported: <br /> Approved by: 04/30/92 REV4 . 1. 90 <br /> SIC^ <br />