Unless covered by subsections (E)(1) and (E)(2) of this section, mines, mineral processing facilities, recreational facilities, veterinary clinics, and agricultural processing businesses, including but not limited to dairies, nurseries, wineries, greenhouses, animal slaughtering, auction yards, Christmas tree farms, commercial stables, crop processing and packaging plants, and uses of a similar nature may have one appurtenant sign not exceeding four feet by eight feet in dimension, no more than two faces, unless a larger sign area is granted by use permit.