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Board of Housing Appeals January 13 , 1986 RE: 2467 E . French Camp Road Gage Two Response to Appeal Issues The appellant incorrectly states that the County Building Inspector (County Building Official ) contends that the operation causes concentrations of airborne dust that are hazardous . Section 901 (a) of the Uniform Building Code contains the following definition for an 11-3 occupancy: "Woodworking establishments , planing mills , box factories, buffing rooms for tire-rebuilding plants and picking rooms; shops, factories or warehouses where loose combustible fibers or dust are manufactured, processed, generated or stored; and pin-refinishing rooms . " Emphasis AddedT— By this definition, any use which generates combustible dust qualifies a building as an H-3 occupancy. The code does not specify the amount or the degree of hazard, only that combustible dust or fibers are generated. It should also be noted that the Group H, Division 3 occupancy is the only classification which allows for uses which generate combustible dust. The key to the classification of this building is two-fold : 1 . Does the process generate dust? 2 . Is wood dust combustible? The operation has been inspected on various occasions by the Director of the Department of Planning and Building Inspection, the County Building Official and the Deputy County Fire Warden. During all of these inspections , it was observed that the process was generating wood dust . During some inspections , the dust handling equipment was inoperative . It has also been observed that dust has been continually collecting on flat surfaces throughout the processing area . The Deputy County Fire Warden has stated that wood dust is combustible . Under the provisions of the Uniform Building Code, the amount or concentration of dust has absolutely no bearing on how this building should be classified . JH/t.p