Alaska Administrative Code
Title 18 - Environmental Conservation
Chapter 72 - Wastewater Treatment and Disposal
Article 6 - Alternative Wastewater Systems
18 AAC 72.620 - Separation distance requirements

(a) A person who installs, modifies, or operates an alternative wastewater system shall ensure that all existing and new components meet the minimum separation distances set out in (b) of this section and 18 AAC 72.100 for private water systems or obtain department approval for the lesser separation distance in accordance with 18 AAC 72.640. The person shall also ensure compliance with 18 AAC 80 for public water systems.

(b) The minimum separation distance between the mean annual high water level of a lake, river, stream, spring, or slough, or the mean higher high water level of tidally influenced coastal waters and a septic tank, primary treatment tank, treatment unit, package plant, soil absorption system, and land surface disposal area is 100 feet, measured horizontally from nearest edge to nearest edge.

(c) The department may require greater separation distances than those required under (a) or (b) of this section if the department determines that the greater distances are necessary to protect surface water, groundwater, and private or public water systems. The department will base its decision on soil classifications, groundwater conditions, surface topography, geology, past experience, and other factors relevant to protection of surface water, groundwater, or drinking water.