Truck 6 was Dispatched Mutual Aid to Frederick County for the Chimney Fire, Middletown, Company 7's First Due Area. Truck 6 (Abrecht) responded w/ 6 personnel. Truck 6 was placed In-service by Chief 7-1 prior to arrival. While returning from Middletown, Truck 6, along with the Engine Company, was dispatched to 111 Green Fern Circle for the reported Chimney Fire. Truck 6 (Abrecht) arrived on the scene and began to Investigate. After checking things over and ruling out sources, nothing was found. Company 6 Units cleared the Event, Good Intent.