Porcupine Eviction Techniques???

Learned Colleagues:

Got a porcupine that has taken up residence under one of my decks. Don't want to kill him there, because getting the carcass out will be well nigh impossible. Not a fan of Have A Hart trapping, lest I end up with a skunk. I'll shoot the SOB if I catch him out during shooting hours, but we've never met.
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Is there something like mothballs that I could throw under the deck to dissuade him from residing there??

Thanks,
R7