Petty Officer 2nd Class Clarence Rivera visually measures a tar ball during the clean up of a 20-mile stretch of land from Padre Island National Seashore to the beaches of Port Aransas, Aug. 6, 2013. Beachgoers contacted Coast Guard Station Port Aransas Sunday to report that tar patties were washing ashore. Sector Corpus Christi deployed personnel from their Incident Management Division to respond. (U.S. Coast Guard photo)