No septic tank, leaching system, or privy be located within a horizontal distance of three hundred (300) feet of any river, creek, pond, reservoir, stream, well, spring, or body of fresh water, or within a horizontal distance of five (5) feet of the boundary line of any lot, or located in position not easily accessible for emptying or cleaning. No or [sic] septic tank or leaching system shall be constructed, located, or maintained within a horizontal distance of ten (10) feet and no privy shall be constructed, located, or maintained within a horizontal distance of twenty (20) feet, of any dwelling, school, public building, or a building used for commercial or industrial purposes, or as a place of assembly.

Provided, however, that the limitation with regard to location of any privy, septic tank, or leaching system within five (5) feet of the boundary line of any lot shall not apply to any privy, septic tank, or leaching system now so located.