Agenda - Council - 06/28/1983 - Laserfiche WebLink

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I I I I I I I I I I I I I I i I *Required' for new development(s) and where practicable, for existing developments. 5. Surface Flooding. Sewage tanks shall not be placed in the flood plains, delJneanted by local ordinances adopted in compliance with the Statewide Standards for Management of Flood Plain Areas of Minnesota (~Jtnn. Reg. NR 85 - 93), or ~n areas for which regional flood ~nformation is ava41able from the Department of Natural Resources. ]50.0]4D DISTRIBUTION OF EFFLUENT Subd. 1 GRAVITY DISTRIBUTION (a) LEVEL GROUND Where the elevation differences of the ground surface does not exceed twenty-eight (28) inches in any direction within the soil treatment area, the sewage tank effluent may be directed to the soil treatment area through a system of interconnected distribution pipes or trenched in a continuous system. (b) SLIGHTLY SLOPING (;ROUND Where the elevation difference of the ground surface exceeds twenty- eight (28) inches in any direction within the soil treatment area, the sewage tank effluent may be distributed by a distribution box, provided the final ground surface elevation of the lowest trench is at least one (1) foot higher than the outlet inverts of the distribution box. 1. The box shall be watertight with a removable cover and shall be constructed of durable materials not subject to excessive corrosion or decay. Each outlet shall have at least six (6) inches of sidewall space and the side of any outlet shall be at least six (6) inches from any corner. 2. ~e inverts of all outlets shall be at the same elevation. '3. The inlet inverts shall be at least one (1) inch above the outlet inverts. 4. The outlet inverts shall be at least fou'r (4) inches above the distribution box floor. 5. Each drainfield trench line shall be connected separately to the distribution box and shall not be subdivided. 6. ~d~en sewage tank effluent is delivered to the distribution box by pump, either a baffle wall shall be installed in the distribution box or the pump discharge shall be directed against a wall or side of the box on whJch there is no outlet. The baffle shall be secured to the box and sha].l extend at least one (1) inch above the crown of the in]et flow line. (c) SlX)PiNG GROUND Where the elevation difference of the ground surface exceeds twenty- eight (28) inches ~n any direction within soil treatment area and a