The failure of a new piece of equipment is traced to a sewage leak early last evening between Seneca and Clemson. According to Bob Winchester, executive director of the Joint Regional Sewer Authority, the failure of an air relief valve at a pump station on Wells Highway behind Blue Ridge Orthopedics caused a sewer spill of an estimated 10 thousand gallons. Within an hour of being notified, Winchester said, crews were able to restore the pump station to working order and applied lime to where the spill occurred. It’s believed the air relief valve was less than one year old. Winchester said it will be replaced by a valve of higher quality. The JRSA executive director said the spill was reported to state health authorities.