(A) All subsurface absorption fields shall be located in accordance with the distances shown in Table II. In soils underlain by fissured or creviced rock formations or by sand or gravel, greater separation distances may be necessary to minimize the possibility of water contamination.
Table II | ||
Minimum Distances in feet from g to | ||
Septic Tank | Absorption System | |
Table II | ||
Minimum Distances in feet from g to | ||
Septic Tank | Absorption System | |
Community water system source | 200 | 200 |
Dwelling or other structure | 10 | 10 |
Front lot lines | 10 | 10 |
Lake or reservoir | 50 | 50 |
Non-community water system source | 100 | 100 |
Private water system source | 50 | 50 |
Side or rear lot lines | 10 | 10 |
Stream, ditch or drainage tile | 25 | 25 |
Suction water lines | 50 | 50 |
Water lines continually under pressure | 10 | 10 |
(B) The trench width shall be a minimum of 18 inches with a maximum width of 36 inches. The trench depth shall be a maximum of 48 inches. Depths of 18 inches to top of the tile are satisfactory.
(C) The absorption tile or perforated pipe shall be completely surrounded by coarse gravel, stone or other approved materials with at least six inches below the tile or pipe and extending upward to at least two inches above the tile or pipe.
(D) The top of the stone shall be covered with untreated building paper, two-inch layer of straw or other like material in such a manner as to prevent the stones becoming clogged with the earth fill.
(E) Field tile shall be lain with one-fourth-inch separation between the ends or joints.
(F) Absorption lines located near trees or shrubs should have at least 12 inches of coarse gravel, stone or other approved materials below the pipe or tile.
(G) The gravel, stone or other approved materials shall be a mixture ranging in size from one- half to two and one-half inches. Fines, dust, sand and clay must be removed from the material before placing in the trench.
(H) Absorption lines shall be individually connected to a distribution box to ensure equal distribution to the entire field.
(I) Subsurface absorption fields shall not be constructed in areas where the land surface gradient is greater than 12%.
(J) A maximum grade of four inches per 100 feet of run shall be given the distribution tile.
(K) No single lateral shall exceed 100 feet in length.
(L) All open joints in the distribution lines which would permit entry of material into the tile shall be covered with paper treated to prevent its decomposition.
(M) There will be a minimum separation of seven and one-half feet, on center, between the absorption field trenches.
(1982 Code, § 91.06) (Ord. passed 1-13-1967; Ord. passed 1-22-1979; Ord. passed 4-29-1985; Ord. passed 11-17-1986) Penalty, see § 53.99