WFR was called to the area of Thunder Road and the Wtn Aquatic Center at 1741 for a report of strong gas smell. Upon arrival was met by the reporting party who stated he just walked by the pool and smell gas and suspected a leak. Upon investigation it was discovered that one or more of the boilers for the swimming pool are burn rich and the natural gas smell was coming form the exhaust system of the boilers. 2 boilers were shut down and the mechanic for the system was called to repair them. No injuries or other hazards were discovered.