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Quality Control Analysis <br /> Client Stephen Vatentme Date Analyzed 10/13/97 <br /> P M W Hunter Batch T-337 <br /> Matrix Aqueous <br /> Project Name <br /> Castle Motors <br /> Matrix Spike and Matrix Spike Duplicate Analysis <br /> QC Limits <br /> Compound Conc Spike Sample Conc MS % Rec Conc MSD % Rec RPD RPD Percent <br /> Added(ugll) Result Recovery <br /> 1,1 Dichloroethene 50 0 4700 94 4700 94 00 20 75-125 <br /> Benzene 50 0 5500 110 5500 110 00 20 75-125 <br /> Trichloroethene 1 50 1 2 5 1 50 001 95 1 4900 1 93 1 2 1 20 75-125 <br /> Toluene 1 50 1 0 5300 1 106 1 5300 1 106 1 00 20 75-125 <br /> Chlorobenzene 1 50 1 0 5400 108 1 5400 108 1 00 20 75-125 <br /> Reviewed and Approved by & - WDate <br /> ahn Shepler, Laboratory Director <br />