First responders arrived at the plant at 7:40 p.m. Tuesday after residents in the area reported smelling ammonia, the Lancaster County Emergency Management Agency posted on social media . 13 mars 2023 · Investigation underway into what caused ammonia leak at Kunzler & Company WGAL - Lancaster/Harrisburg March 13, 2023 0 An investigation is underway into what caused an ammonia leak at.