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1 <br /> ' CHEMWEST ANALYTICAL LABORATORIES <br /> HALOGENATED VOLATILE ORGANICS <br /> EPA METHOD: 8010 <br /> Quality Control <br /> ' Client ID: NCS-4 EAST END MS/MSD CHEMWEST ID: 9501-QC2 <br /> Date Analyzed: 04/28/92 Matrix : Soil <br /> ' Spike % % <br /> C -)nc . Recovery Recovery <br /> ' Compound ,.4G/KG) 9501-2MS 9501-2MSD RPD <br /> ---------------------------------------------- <br /> 1 , 1-Dkchlorcethane 0. 30 103% 107% 4% <br /> Chloroform 0 . 30 130% 127% 2% <br /> ' Trichloroethene 0. 30 100% 90% 11% <br /> Bromodichloromethane 0 . 30 100% 97% 3% <br /> Tetrachloroethene 0 . 30 80% 73% 9% <br /> Chlorobenzene 0. 30 60% 500 18% <br /> ' 1 , 2-Dlbromoethane 0. 30 130% 1230 6% <br /> ------------------.-------------------------------------------------- <br /> ' Spike % % <br /> Conc. Recovery Recovery <br /> Surrogates (MG/KG) 9501-2MS 9501-2MSD <br /> ---------------------------------------------------------------- <br /> Bromochloromethane 10 71% 74% <br /> Ortho-Chlorotoluene 20 11% X 27% X <br /> X : Matrix Interference, See Case Narrative <br /> 1 <br /> 1 <br /> Date Reported: <br /> Approved by: 04/30/92 REV4 . 1 . 90 <br /> 1 , <br />