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MED-TOX <br /> ASSOCIATES INC <br /> PAGE 60 OF 61 <br /> DATE EXTRACTED: 05/06/91 MED-TOX JOB NOS: 9105036, <br /> DATE ANALYZED: 05/09/91 9105037 <br /> SAMPLE SPIKED: POLAR WATER INSTRUMENT: 11 <br /> MATRIX SPIKE RECOVERY SUMMARY <br /> METHOD 8270 <br /> (WATER MATRIX) <br /> Spike Sample Ms NSD Average <br />' Conc. Resutt Result Result Percent <br /> ANALYTE WOO (ug/L) (ug/L) (ug/L) Recovery RPD <br /> Phenol 150 ND 81.7 92.3 58.0 12.2 <br /> 2-Chtorophenol 149 ND 81.3 91.2 57.9 11.5 <br /> 1,4-Dichlorobenzene 143 ND 72.5 80_8 53.6 10.8 <br /> N-Nitroso-di-n-propylamine 154 ND 90.7 96.4 60.7 6.1 <br /> 1,2,4-Trichlorobenzene 152 ND 85.9 89.7 57.8 4.3 <br /> 4-Chloro-3-methylphenol 145 NO 91.4 91.1 62.9 0.3 <br /> Acenaphthene 146 ND 90.5 96.4 64.0 6.3 <br /> 4-Nitrophenal 145 ND 82.5 76_7 54.9 7.3 <br /> 2,4-Di m trotoluene 120 NO 81.8 83.0 68.7 1.5 <br /> Pentachlorophenol 153 ND 80-7 72.2 50.0 11.1 <br /> Pyrene 153 ND 117.0 115.0 75.8 1.7 <br /> CURRENT QC LIMITS <br />' Analyte Percent Recovery RPD <br /> Phenol (12- 89) 42 <br /> 2-Chlorophenol (27--123) 40 <br /> 1,4-Dichlorobenzene (36- 97) 28 <br /> N-Nitroso-di-n-propylamine (41-116) 38 <br /> 1,2, 4-Trichlorobenzene (39- 98) 28 <br /> 4-Chloro-3-methylphenol (23- 97) 42 <br /> Acenaphthene (46-118) 31 <br /> 4-Nitrophenol (10- 80) 50 <br /> 2 ,4-Dinitrotoluene (24- 96) 38 <br /> Pentachlorophenol ( 9-103) 50 <br /> Pyrene (26-127) 31 <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> ND = Not Detected <br />