Box 20-1 was struck at 01:22 for a possible structure fire at 618 3rd Ave Duncansville. Chief 20-01 (Lloyd) responded direct and assumed command.  20-11 and 20-31 also responded. 20-01 arrived on the scene and began to investigate.  The engine crew made entry and found a small fire in the basement.  It was quickly extinguished with the can.  Crews stayed on the scene for a few hours.  The box was held to 20-11, 20-31 and 50-12.  Crews cleared the scene shortly after ventilation was completed.