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QuanteQ Laboratories <br /> An (ump,rn <br /> PAGE 4 OF 4 <br /> i <br /> QUALITY CONTROL DATA <br /> DATE ANALYZED. 02/03/93 QUANTEQ JOS NO: 9301209 <br /> INSTRUMENT 12 <br /> CLIENT PROD ID 2655 SAMPLE SPIKED: 9301209-01A <br /> METHOD SPIKE RECOVERY SUMMARY <br /> METHOD 8240 <br /> (SOIL MATRIX) <br /> Spike Sample ms NSD Average <br /> Conc. Result Result Result Percent <br /> ANALYTE (ug/kg) (ug/kg) (ug/kg) (ug/kg) Recovery RPD <br /> 1,1 Dichloroethene 50 0 ND 51 7 54 7 106 4 5 6 <br /> Trichloroethene 50.0 ND 46 1 47 0 93 1 1 9 <br /> Benzene 50 0 RD 44 2 45 5 89.7 2 9 <br /> Toluene 50 0 RD 44 6 46 3 90 9 3 7 <br /> Chlorobenzene 50 0 ND 44 8 45 8 90 6 2 2 <br /> CURRENT QC LIMITS (Revised 08/13/91) <br /> Analyte Percent Recovery RPD <br /> 1, 1-Di.chloroethene (61-143) 15 <br /> Trichloroethene (72-121) 12 <br /> Benzene (82-123 ) 10 <br /> Toluene (80-118) 12 <br /> Chlorobenzene (82-113) 10 <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> op ND = Not Detected <br />