Is it a confined space ? These examples may not immediately meet the eye. Confined spaces exist in many forms and are found in industry, food, chemical and petroleum processing, utility and communications installations, construction sites, and other work areas. It’s best to treat unknown areas and their interior environments as if confined space exists and to take all necessary safety precautions. Confined space entry presents potential hazards if conditions are not checked in advance or if proper PPE is not worn. Con fined space entry ports and shafts are often small and narrow, accessed via ladder or rope. If hazardous conditions exist within, workers can be trapped inside and become subject to toxic gases, explosions, oxygen deficiency, particulates, and other hazards.