The feeder sewer from the tank to the laterals of the disposal field shall be constructed of vitrified bell-and-spigot tile with cemented joints and shall be laid with a grade of one foot (1') per one hundred feet (100'); disposal field tile shall be located at least seventy five feet (75') distant from any well and ten feet (10') from the tank, and thirty feet (30') from any building used for human habitation. No lateral shall be closer than five feet (5') from the lot line. There shall be at least two hundred feet (200') of disposal field tile, consisting of four inch (4") drain tile laid with open joints. Disposal tiles shall be laid to a depth of not more than two feet (2') on a slope not to exceed six inches (6") per one hundred feet (100'). (1968 Code, sec. 53-104)