Skip to code content (skip section selection)
(A) Subdivisions where private sewage treatment and disposal systems are to be used, must be approved by the Health Authority. Subdivisions utilizing public sewage treatment and disposal facilities located in unincorporated areas of the county must be approved by the Health Authority. There shall be a plat review fee for all proposed subdivisions. A plat review fee for all subdivisions must be submitted prior to review by the Environmental Health Staff. The fee shall be as designated in Appendix A . All fees are non-refundable.
(B) Any subdivision being developed which is in part within 1,320 feet of an existing available approved sewer shall not be developed by utilizing septic tanks and ground absorption trench systems or individual mechanical sewage treatment systems unless the lots in that subdivision are two and one-half acres or more in area of which at least three-fourths of each lot consist of solid land surface outside of a floodplain or wetland. An approved sewer, for the purpose of this section, is a sewer connected to and served by a sewage treatment plant operated by the county, township, a municipality, sanitary district or privately owned utility company.
(C) In subdivisions not falling within the requirements of division (B) above, all individual sewage disposal systems shall be designed based upon the soil class as identified by an on-site soil evaluation/classification. This evaluation shall be conducted by the Health Authority or soil classifier or Illinois licensed professional engineer on each of the lots in the proposed subdivision. The latest official county soil maps shall be used to determine the names and numbers of each soil class. Soil classes shall be as described in the County Soil Report 80.
(D) Soil evaluation. The soil evaluation procedures are set forth in Appendix B. There shall be a fee for each soil evaluation conducted by the Health Authority. The fee shall be paid in advance and shall be made payable to the County Health Department. This fee is non-refundable. The fee shall be as designated in Appendix A .
(1) Appendix C, Table 1 shall be used to group county soils into categories based on their similar, soil permeability and textural class.
(2) Appendix C, Table 2 shall be used in establishing the minimum lot size and minimum lot width where a private well or public water supply is used. Appendix C, Table 2 shall be used in establishing the minimum size of the ground absorption trench system based upon the soil categories listed in Appendix C, Table 1 . The minimum lot size shall exclude any easement or other conditions that would limit the area available to be used for ground absorption trench systems. The minimum lot widths as set forth in Appendix C, Table 2 will be waived on all lots fronting on a cul-de-sac and lots fronting on a curved portion of a street. However, the minimum lot width as set forth in Appendix C, Table 2 must be available in that area designated for the installation of the ground absorption trench systems.
(E) If the proposed final topography of any lot within the subdivision will change the elevation by more than one foot in the area to be used for the installation of the ground absorption trench system, a second on site soil evaluation, to be performed by a soil classifier or Illinois licensed professional engineer, will be required after the final grading is accomplished and prior to final approval of the subdivision. Based upon the results of this second on site soil evaluation, the lot sizes shall be required as outlined in Appendix C, Table 2 .
(F) The latest official soil maps for the county as prepared by the Soil Conservation Service of the United States Department of Agriculture shall be utilized in evaluating all proposed subdivisions.
(1) The following soils have been determined as having specific limitations regarding the satisfactory operation of ground absorption trench systems. These soils are frequently or continually waterlogged and are subject to periodic inundation by stormwater runoff. They have a reasonably high water table which tends to impair the continuous satisfactory operation of ground absorption trench systems.
(2) The installation of ground absorption trench systems in the following soils shall not be permitted unless an engineering plan providing specific solutions which will permanently overcome the ground water conditions is received and approved by the Health Authority.
Harpster Silty Clay Loam
Milford Silty Clay Loam
Drummer Silty Clay Loam
Pella Silty Clay Loam
Troxel Silt Loam
Gilford Fine Silt Loam
Thorp Silt Loam
Ashkum Silty Clay Loam
Bryce Silty Clay
Rantoul Silty Clay
Millsdale Silty Clay Loam
Will Silty Clay Loam
Peotone Silty Clay Loam
El Paso Silty Clay Loam
Granby Fine Sandy Loam
(G) Proposed subdivision review data. The following pertinent data must be submitted to the Health Authority by a professional engineer, architect or surveyor. This data must be acceptable to the Health Authority before final approval is given on the subdivision:
(1) A legal description of the site;
(2) Plat showing the subdivision of the site into individual lots, dimensions of lots, portions of lots subject to setback and easement requirements;
(3) Topographical map showing original and final contours at two-foot intervals shall be superimposed on the plat of subdivision;
(4) Data on present and past use of the site, existing vegetation, crops, trees existing well and septic system locations and the like;
(5) All available and known information on the existing drainage system in the proposed subdivisions, both surface and underground. Where tiles exist, their size, location and outlets shall be indicated on the topographical map;
(6) A soil overlay based on the latest official soil maps for the county as prepared by the Soil Conservation Service of the United States Department of Agriculture;
(7) Soil boring tests to a maximum depth of 32 feet to determine soil cover over limestone rock may be required on each subdivision, unless the information is available through the State Geological Survey Division; and
(8) A detailed description and specific location of the water supply and sewage disposal system on each lot in the proposed subdivision.
(H) All undeveloped lots located in subdivisions which were legally recorded prior to July 16, 1987, amendments to this section, will not be affected by the minimum lot sizes as set forth in the July 16, 1987 amendments. In the event the existing lot is reduced in size, all restrictions herein set forth in the July 16, 1987 amendments shall be applicable.
(I) All parcels of land located other than in legally recorded subdivisions which were in existence prior to the passage of the July 16, 1987 amendments will not be affected by the minimum lot sizes as set forth in the July 16, 1987 amendments. In the event an existing parcel of land is reduced in size, all restrictions set forth in the July 16, 1987 amendments shall be applicable.
(J) All existing subdivision lots and parcels of land as outlined in divisions (I) and (J) above will be accepted by the Health Authority for the installation of sewage treatment or disposal systems consisting of septic tanks and ground absorption trenches, only if all other requirements of this chapter can be fully complied with.
(1980 Code, § 51.03) (1963 pp. 361-363, adopted 8- -1963) (Sup. Rec. Bk. 235, pp. 258-259) (Res. 87-74, passed 7-16-1987; Res. 75-79, adopted 4-25-1979; Res. 92-207, passed 9-17-1992; Res. 05-340, adopted 7-21-2005; Res. 07-0412, adopted 10-18-2007; Ord. 11-74, passed 2-17-2011; Ord. 14-279, passed 10-16-2014) Penalty, see § 51.99