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MED-Tox <br /> ASSOCIATES INC <br />' PAGE 57 OF 61 <br /> DATE ANALYZED: 05/08/91 MED-TOX J08 NOS: 9105035, <br /> SAMPLE SPIKED: 9105037-01D 9105036 & 9105037 <br /> CLIENT PROD. ID: 10246.19 INSTRUMENT: 12 <br /> 1 <br />' MATRIX SPIKE RECOVERY SUMMARY <br /> METHOD 8240 <br />' (WATER MATRIX) <br />' spike Sample Ms NSD Average <br /> Conc. Result Resu{t Resutt Percent <br /> ANALYTE (ug/L) (ug/L) (ug/L) (ug/L) Recovery RPD <br /> 1,1-Dichtoroethene 50.0 ND 50.6 51.7 102.3 2.2 <br /> Trichloroethene 50.0 ND 55.3 57.2 112.5 3.4 <br /> Benzene 50.0 ND 49.1 51.0 100.1 3.8 <br />' Toluene 50.0 NO 52.0 52.9 104.9 1.7 <br /> Chlorobenzene 50.0 ND 52.1 52.2 104.3 0.2 <br /> I <br /> CURRENT QC LIMITS (Revised 03/15/91) <br /> Analyte Percent Recovery RPD <br />' 1, 1--Dichloroethene (66-134) 14. 2 <br /> Trichloroethene (87-120) 9 .2 <br /> Benzene (90-117) 8. 8 <br />' Toluene (91-119) 9. 4 <br /> Chlorobenzene (88-120) 8 .3 <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> ND = Not Detected <br />