Rule 2458. A permittee of a well shall ensure that a well is identified by a sign which is posted in a conspicuous place and which is not more than 20 feet from the well. A sign shall be durably constructed, be kept in good condition, and the lettering shall be not less than 1 ½ inches high and legible under normal conditions at a distance of 25 feet. A sign shall show all of the following information:
Mich. Admin. Code R. 299.2458