The setting of an open fire at a location inside the Capital Beltway (I-95) is prohibited except for the following: For the prevention of a fire hazard that cannot be abated by other means. For the instruction of public fire fighters or industrial employees under supervision of the appropriate fire control official with approval of the County Fire Chief or his designee. For the protection of public health or safety when other means for disposing of hazardous materials are not available. For recreational purposes such as campfires, bonfires or for the cooking of food on other than commercial premises. For fires set in the course of agricultural operations in growing crops or raising fowl or animals or in accepted forestry practices. In no case shall this provision be construed as allowing the burning of ordinary household or barnyard trash in areas where provision is made for public collection of refuse.