Photo: Philadelphia Fire Department and Hazmat respond to ammonia spill on E. Butler St. in Philadelphia

Philadelphia Fire Department and their Hazmat Unit were called to E. Butler near Aramingo Avenue for the strong smell of ammonia on Wednesday afternoon February 1, 2012. Hazmat Unit suited up several fire fighters to check a large tank behind an abandoned warehouse. Alejandro A. Alvarez / Philadelphia Daily News / © 2012 Philadelphia Media Network