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MED-Tox <br /> ASSOCIATES, INC. <br /> PAGE 17 OF 19 <br /> DATE ANALYZED: 11/07/91 MED-TOX JOB NO: 9111040 <br /> SAMPLE SPIKED: 9111040-OIA <br /> CLIENT PROJ. ID: 190892.2 INSTRUMENT: H <br /> MATRIX SPIKE RECOVERY SUMMARY <br /> METHOD 5030 w/GCFID/8020 <br /> (SOIL MATRIX) <br /> Spike Sample MS MSD Average <br /> Conc. Result Result Resu Lt Percent <br /> ANALYTE (ug/kg) (ug/kg) (ug/kg) (ug/kg) Recovery RPD <br /> Benzene 24.2 ND 25.0 25.7 104.8 2.8 <br /> Toluene 105 ND 107 107 101.9 0.0 <br /> Hydrocarbons <br /> as Gasoline 1040 ND 923 924 88.8 0.1 <br /> CURRENT QC LIMITS (Revised 08/15/91) <br /> Analyte Percent Recovery RPD <br /> Benzene (80.8-125.2) 9.6 <br /> Toluene (82.7-119.1) 10.2 <br /> Gasoline (54.0-120.1) 14.8 <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> NO = Not Detected <br />