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(a) An applicant seeking approval under this chapter for a site proposed for use as a hazardous waste land facility, chemical waste landfill, or hazardous waste underground injection well must demonstrate to the department's satisfaction that the naturally occurring geologic strata are capable of preventing the release of waste to the environment for 1,000 years, or some demonstrated shorter time period in which the wastes would be transformed to an innocuous condition. The geologic strata must be of sufficient integrity to withstand the maximum probable 1,000-year seismic, volcanic, or flooding event. The maximum probable seismic, volcanic, or flooding event must be determined within the 90 percent confidence interval.
(b) The demonstration required by (a) of this section must show that
(1) there is a 90 percent probability that the thickness and permeability of the geologic strata immediately surrounding the site will, for 1,000 years, prevent contact with any aquifer suitable for use as a drinking water supply;
(2) the facility will be placed so that disposal locations will not significantly impact or be impacted by any free-flowing or standing surface water for 1,000 years; and
(3) the geochemical characteristics of the geologic strata at the site are compatible with the wastes proposed to be disposed of at the site.
(c) An application for a hazardous waste land facility, chemical waste landfill, or hazardous waste underground injection well must also include
(1) a description of the hydrology of the cataloging unit from the Alaska Hydrologic Unit Map of the area where the proposed facility is to be located, including
(A) a description of the groundwater flow system showing areas of recharge and discharge and direction of groundwater flow;
(B) a description of the climate, including precipitation, temperature, and evapotranspiration;
(C) a description of stream flow characteristics; and
(D) a discussion of any other features, such as wetlands, lakes, glaciers, or permafrost, that relate to the general hydrological setting;
(2) a detailed description of the hydrogeology of the proposed disposal site which includes identification of all hydrostratigraphic units beneath the surface which could reasonably be expected to be impacted within 1,000 years, determinations of direction and rate of groundwater flow, and the technical basis for those determinations;
(3) the location and identification of all aquifers within a 5,000 meter radius of the proposed site, as evidenced by available boring or well logs, other geophysical or geological data, or other available information;
(4) a delineation on the topographic map required by 40 C.F.R 270.14(b)(19) (codified as of July 1986) of the proposed active portions of the facility and each proposed point of compliance;
(5) identification on the topographic map required by 40 C.F.R. 270.13(h) (codified as of July 1986) of all domestic, municipal, or industrial water wells, and oil and gas wells and borings, within 5,000 meters in all directions of the property line of the proposed facility; and
(6) a description of any plume of contamination that has entered the groundwater from any solid waste disposal site or any other waste disposal activity on the property at the time the application is submitted, which
(A) delineates the extent of the plume on the topographic map required by 40 C.F.R. 270.14(b)(19) (codified as of July 1986);
(B) delineates the vertical and horizontal distribution of the plume; and
(C) identifies the concentration of each constituent listed in 40 C.F.R. Part 261, Appendix VIII (codified as of July 1986) throughout the plume, and identifies the maximum concentrations of each such constituent in the plume.
History: Eff. 3/31/89, Register 109
Authority: AS 46.03.020
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Last modified 7/05/2006