Double walled environmentally safe tanks for the storage of flammable and combustible fluids and liquids, hydrocarbons, lubricants, fuel, diesel fuel and waste oil; dispensing equipment for dispensing flammable and combustible fluids and liquids, hydrocarbons, lubricants, fuel, diesel fuel and waste oil, namely, engines, pumps, gear meters, flow meters, fuel hoses and hose retractors for dispensing same