108-18-7 Sewers Within Drinking Water Source Protection Zones And Management Areas

Sanitary sewer lines may not be located within Zones One and Two or a management area unless the criteria identified below is met. If sewer lines are located or planned to be located within Zones One and Two or a management area, the developer must submit a preliminary evaluation report demonstrating that they comply with this criteria. Sewer lines that comply with these criteria may be assessed as adequately controlled potential contamination sources. Zones One and Two. If the conditions specified in subsections (a)(1) and (2) of this section are met, all sewer lines within Zones One and Two shall be constructed in accordance with state requirement and must be at least ten feet from the wellhead. There is at least five feet of suitable soil between the bottom of the sewer lines and the top of the maximum seasonal groundwater table or perched water table. (Suitable soils contain adequate sand/silt/clay to act as an effective effluent filter within its depth for the removal of pathogenic organisms and fill the voids between coarse particles such as gravel, cobbles, and angular rock fragments); and There is at least five feet of suitable soil between the bottom of the sewer line and the top of any bedrock formations or other unsuitable soils. Bedrock formations include formations that have such a low permeability that they prevent the downward passage of effluent. Bedrock formations that have open joints or solution channels, which permit such rapid flow that effluent is not renovated, are also considered unacceptable. Other unsuitable soils include those with coarse particles such as gravel, cobbles, or angular rock fragments with insufficient soil to fill the voids between the particles. Solid or fractured bedrock such as shale, sandstone, limestone, basalt, or granite are unacceptable. Zones One and Two. If the conditions identified in R309-600-13(3)(a)(i) and (ii) cannot be met, any sewer lines within Zones One and Two or a management area shall be constructed in accordance with R309-515-6(4) and must be at least 300 feet from the wellhead or margin of the collection area.