A.
Soil investigations as required by this chapter shall be conducted by an authorized representative of the Health Department or other professional persons acceptable to the health authority. Professional persons shall be acceptable only after they have demonstrated the ability to perform soil investigations according to this code and demonstrate the ability to analyze the physical characteristics of soils. The Health Department reserves the right to have professional persons submit credentials and other related information as need be to the Soil and Water Conservation District. If a soil investigation is performed by and at the expense of the Health Department, the Department is authorized to charge a reasonable fee.
B.
The soil survey of Stephenson County, prepared by the Natural Resources Conservation Service of the United States Department of Agriculture, shall be the official source of information about soils in Stephenson County. A table based on data supplied by the soil survey and interpreted by the Health Department is on file in the Health Department and will be reviewed on an annual basis by representatives of the Health Department in conjunction with representatives of the Soil and Water Conservation District. The table establishes the criteria to be used in determining the suitability of specific soils for constructing and sizing subsurface sewage systems; the criteria apply as a minimum. Field confirmation of the soil type by soil investigations is required. Soil borings performed with hand equipment as part of the site evaluation by persons authorized by the Health Department will be accepted. The borings must penetrate to a depth of at least five feet below the finished grade in the proposed seepage field area to identify soil characteristics which may influence the operation of a private sewage system. A minimum of three soil borings shall be performed in the area of the approved drainfield site. The results of the soil investigation shall be reported on a form approved by the Health Department.