Rocky,
This works on skunks so maybe it may be worth a try with chipmunks.

Get an Exlax bar and grind it up into small pieces and place in a small pan where you think they may be.

Or if you have no rodent pets such as hamsters or gerbils,you can get a product in the mouse trap department at your hardware store that plugs into any indoor outlet and uses the wiring to create a high pitched sound (dogs & cats can't hear it but the rodent pets will) and in about a week......gone!!

I had a mouse problem in the house and it worked.

Wayne