How do you delete catalog records?
Create a CATALOG DELETE command using the following as an example:
CAT DEL DATE 10/05/16 VOLUM VW4947 OWNER * UNIT * POOL DAILY
After this runs, either through a SYSIN file or interactively, run CONDENSE. The CATALOG DELETE command only marks the record for deletion, CONDENSE removes them. If you run with SCRATCH ALWAYS then run RECYCLE. This will remove the volsers from the PPOOL file they were in.