Spoolfile Cleanup on powerdown/restart

Background : 75Gigs of DASD
             85% Used
             QSPL is nearly 9 gigs

My boss wants to incorporate a nightly powerdown/restart
pwrdwnsys option(*immed) restart(*yes) into the nightly
backup to clear up used spool file space or cleanup qspl in general.

1) is there such a process to do this already built into the IPL

He says the answer is yes...but only every so many IPL's
Does it actually "flip the switch" and run this process.

I told him that sounds strange...either it should do it
Every time or not.

So which one of is more crazy?

P.S. I don't want to hear about RGPFM or any other command
That will save space...we know about those.
I just was curious about the spool file cleanup process
During a restart.

Thanks,

Jim