In every subdivision, provision shall be made for the satisfactory disposal of sanitary sewage:
1. Where a public sanitary sewer main is reasonably accessible, in the opinion of the Commission, the subdivision shall be provided with a complete sanitary sewer system connected with such sewer main, including a service connection to within one foot of a lot line of each lot. Such system shall be approved by the City Engineer and the Iowa Department of Natural Resources.
2. Where a public sanitary sewer main is not reasonably accessible, in the opinion of the Commission, proper provisions shall be made for the disposal of sanitary waste, subject to approval of the City Engineer. If individual disposal systems are provided, they shall be located on each lot.
3. When an individual septic disposal system is proposed, the subdivider shall determine whether or not this is feasible, based on the criteria of soil absorption, surface drainage, and topography. At least two percolation tests shall be made on each lot at the approximate location of the septic system absorption field. Such tests shall be performed in accord with the requirements of the Commission, City Engineer and the County Health Department. The results of these tests shall be certified by a registered Iowa Professional Engineer and made known to the City Engineer, the Commission, and the County Health Department.
4. Wherever excavation for storm sewer, sanitary sewer, and/or water mains and associated infrastructure may lie beneath existing or proposed pavement, sidewalk or drive area, such excavation shall be backfilled by a method and with material of a type approved by the City Engineer.
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