You guys are killin' me !
A chipmunk is often called a 'ground squirrel...but a TRUE ground squirrel is the one the guy pictured.
The simple , most effective way to trap them, is with a cage trap that fits directly OVER the hole.
You 'sight' the squirrel first, then run it in the hole.
You then set the trap directly over the hole and back off.
In most cases, you'll have it in 15 minutes.
*** JIM BETHELL currently makes the best trap for this . He's a member here on this forum !
If there are a few other holes close by...you instantly 'plug' them shut.
How do you do that ?, you ask.
You do own a 28 oz Estwing, right ???

LT G