At 16:19 hours, the Upper Nazareth Fire Department (F54), Vigilance Hose Company (F50), and Hecktown Vol. Fire Company (5341) were alerted for an indoor odor investigation on Monacacy Drive in Upper Nazareth Township. 5451 (Chief Seiple) arrived on scene and established the 54 Command. Engine 5412 arrived and crews investigated the dwelling. Engines 5413, 5012 and Rescue 5341 arrived and staged in the area. UGI was notified.