921.07 MINIMUM STANDARDS FOR DISPOSAL; FIELD CONSTRUCTION.
   The minimum standards for disposal field construction shall be as follows:
Minimum standards for disposal field construction
Disposal Field Construction
Minimum Standard
Individual lines, maximum length
100 feet
Trench bottom, minimum width
18 inches
Field tile, minimum diameter
4 inches
Field tile lines, maximum slope
6 inches in 100 feet
Field trenches, minimum separation
6 feet
Effective absorption area,
minimum per dwelling unit

250 square feet
   (1973 Code Sec. 51.35)