Alaska Administrative Code › Title 18 - Environmental Conservation › Chapter 80 - Drinking Water › Article 1 - General Drinking Water Requirements › 18 AAC 80.020 - Minimum separation distances

Current through May 31, 2024
(a) A person may
				not construct, install, maintain, or operate a public water system unless the
				minimum separation distances in Table A, in this subsection, are maintained
				between a potential source of contamination and a drinking water source for the
				public water system.
TABLE A.
Minimum Separation
							 Distancesa Between Drinking Water Sources and
							 Potential Sources of Contamination
(Measured horizontally in
							 feet)
Potential Sources of Contamination
Community Water Systems, Non-transient Non-Community
							 Water Systems, and Transient Non-Community Water Systems
Wastewater treatment
							 worksb, wastewater disposal system 
							 b, pit
							 privyb, sewer manhole, lift station, sewer line, and
							 sewer line cleanout
200
Community sewer line, sewer main, wastewater holding
							 tankb, other potential sources of
							 contamination
200
Private sewer line, sewer service line, drain (buried
							 in the ground), petroleum lines and storage tanksd,
							 drinking water treatment wastee
100
Notes to Table A:
a These minimum distances
							 will be expanded, or additional monitoring will be required under
							 18 AAC 80.020(b) and (e)(2).
b Distance to a drinking
							 water source is measured from the nearest edge of the drinking water source to
							 the nearest edge of the potential source of contamination.
c Other potential sources
							 of contamination include sanitary landfills, and domestic animal and
							 agricultural waste.
d The minimum separation
							 distances for petroleum storage tanks do not apply to tanks that contain
							 propane, or to above-ground storage tanks or drums that, in the aggregate, have
							 a storage capacity of less than 500 gallons of petroleum products, and that
							 store only petroleum products necessary for the operation and maintenance of
							 pumps, power generation systems, or heating systems associated with a potable
							 water source.
e Drinking water
							 treatment wastes include the backwash water from filters and water softeners,
							 and the reject water from reverse osmosis units.
(b) The
				department will require a greater separation distance than that required by
				Table A in (a) of this section if the department determines that additional
				distance is necessary to protect surface water, groundwater, or a drinking
				water source. The department will make this decision after considering soil
				classifications, groundwater conditions, surface topography, geology, past
				experience, or other factors relevant to protection of surface water,
				groundwater, or drinking water.
(c)
				A request for a waiver under (d) of this section must include the fee required
				under 18 AAC 80.1910(a)(11) and a report for each
				waiver that is sought, including multiple waivers for a single project. The
				report required under this subsection must
(1) be sealed by a registered engineer;
(2) justify the lesser distance
				and explain how the lesser distance does not threaten public health;
(3) describe soil classifications,
				groundwater conditions, surface topography, geology, and other environmental
				conditions that would assist the department in establishing a lesser separation
				distance; and
(4) include a set of
				plans consisting of
(A) record drawings if
				the department determines them necessary to evaluate the request;
(B) an accurate description, including the
				location, of potential sources of contamination and existing or potential
				drinking water sources in the area;
(C) the details of the system design that
(i) address the physical and environmental
				conditions listed in (3) of this subsection;
(ii) will prevent contamination of the
				drinking water sources identified in (B) of this paragraph at the lesser
				distance; and
(D) other
				information the department determines to be necessary to assess the effect of a
				lesser distance upon the public water system.