My question is i'm inspecting a power plant that extracts methane out of a landfill, the gas is then compressed cooled, and fule for 3 16kva generators. The compressors and generators are in an open enviorment with fan forced ventilation equipped with detectors to increase speed of fans at 25% lel and shut down at 50% lel should this be a class 1 div 2? The owners rep tells me its not a classified location. Any input would help