Those who have been convicted of a summary offense are eligible to have that conviction expunged from their criminal history.  In cases where an individual has been convicted of a non-underage drinking summary offense, the person is eligible for expungement:

The person may apply for expungement of the conviction of a summary offense only if the person has been free of arrest or prosecution for five years following the conviction of the summary offense sought to be expunged.

If you wish to inquire about whether you are eligible for expungement or the procedure for expungement you should contact the attorneys at the Kelly Law Firm for a free consultation.