(Albany, OR)  --  A man who was accused of setting a fire that destroyed a good portion of South Albany High School is awaiting sentencing, after pleading guilty to arson.  Zach Burghart was already on probation for a fire he set when living on a farm in rural Linn County last fall, and is facing a tougher sentence as a result.  Burghart also pleaded guilty to a hit and run charge for crashing into a camper while fleeing after setting the fire in April to South Albany High.  He's scheduled for sentencing Thursday.