This administrative compliance order on consent (AOC) requires Hill Brothers Chemical Company to resolve outstanding compliance issues associated with the Clean Air Act provisions of the Chemical Accident Prevention program described in 112(r)(7) and 40 C.F.R. Part 68. The AOC is applicable to the facilities located in Phoenix, AZ and City of Industry, CA, which specialize in manufacturing, repackaging, and distributing of hazardous chemicals including anhydrous ammonia and chlorine.