Empty small propane tanks (workbench, camping, small grill) can be brought to Tarvin Auto (ten or fewer). Otherwise, for empty or full tanks call (513) 732-7745 for a household hazardous waste voucher to enable free drop-off at Environmental Enterprises. Large propane tanks (camper or mobile home) can be returned to natural gas or propane vendors. Empty benzomatic or camping propane tanks can be brought to Round Bottom Recycling where they pay you for the metal.