Maximum Hardship distribution

Simple question, a 401(k) Plan only allows for salary deferrals and a 401(k) ADP Safe Harbor Match. If eligible and assuming no outstanding loans and the total amount in his account meets the amount of his financial need, can the participant take a hardship distribution of 100% of each account?

What does the plan document say? Having an outstanding loan doesn't mean you can't have a hardship. 

The plan document can limit the maximum amount of (or the reasons for obtaining) a hardship distribution.  Assuming the document imposes no unexpected limitations, there is no limit on the percentage of the participant's vested account balance that can be distributed on account of a hardship.