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Quality COntrOl Analysis <br /> Client Stephen Valentine Date Analyzed 10/13/97 <br /> P M W Hunter Batch T-337 <br /> Matrix Aqueous <br /> Proiect Name <br /> Castle Motors <br /> Opening Standard <br /> QC Limits <br /> Conc Spike Sample Percent <br /> Compound Added u /I Result Conc MS % Rec PD PD Recover <br /> 1,1 Dichloraethene 100 O 10570 106 5 7 20 80-120 <br /> Benzene 100 0 10530 105 5 3 20 80-1 20 <br /> Trichloroethene 100 0 9940 99 06 1 20 80-120 <br /> Toluene 100 0 10290 1 103 29 20 1d <br /> 80-120 <br /> Chlorobenzene 100 O 10000 100 00 20 80-120 <br /> Closing Standard <br /> QC Limits <br /> Conc Spike Sample Percent <br /> Compound Conc M5 % Rec PD PD <br /> Added(ug/11 Result I Recover <br /> 1,11 Dichloroethene 100 0 9590 96 41 25 75-125 <br /> Benzene 100 0 101 30 101 1 3 25 75-125 <br /> Trichloroethene 100 0 10320 103 32 25 1 75-125 <br /> Toluene 100 0 101 30 1 101 1 1 3 25 75-125 <br /> Chlorobenzene 100 0 10270 103 1 27 25 75-125 <br /> Reviewed and Approved by & i /,/ Date 7 <br /> /fohn j(/Sheplef, Laboratory Director <br /> RECF— <br /> H <br /> I <br />