Here's an example assuming the fitness data is the active table. Use the Column Info dialog to put your own spec limits in for, say, the oxy column. For testing I set the LSL, Target, USL as 40, 50, 60 respectively. Open the log window to see that the spec info was read correctly.
dt1 = Data Table( "Fitness" );
specs = Column( dt1, "Oxy" ) << get property( "Spec Limits" );
lsl = specs["LSL"];
usl = specs["USL"];
target = specs["Target"];
Show( lsl, usl, target );