I would recommend you get a lawyer. You are probably eligible for ARD which is a first offender pretrial progam which allows you to earn a dismissal and expungement of the charges by successfully completing a period of probation.
You are in the middle tier (High Rate of Alcohol) of DUI offenses in PA according to your BAC of .15. However, if you don't have a prior DUI or substantial criminal record, you may be eligible for an ARD program if the judge accepts your application. Contact a local attorney to better explain your rights and options going forward.