6 Colo. Code Regs. § 1007-2.5

Current through Register Vol. 47, No. 11, June 10, 2024

Section 6 CCR 1007-2.5 - Requirements for Siting and Design of Off-Site Hazardous Waste Disposal Sites and On-Site Hazardous Waste Landfills

2.5.1 The siting and design of each site for disposal of hazardous waste shall demonstrate that the minimum design performance criteria contained in Section 2.4 of these regulations will be satisfied after site construction and implementation of the proposed design.

2.5.2 The proposed design, and design performance of a hazardous waste disposal site shall satisfy or satisfactorily mitigate the following conditions:

a) Under normal climatic conditions odor-threshold concentration levels established in State air pollution regulations will not be exceeded;

b) Proposed access routes shall be reasonably safe based on minimizing public exposure to transportation incidents, and a finding that such routes can be shown to meet or exceed classification standards for State roads;

c) Adequate fire protection is provided on a 24-hour day basis by an organized fire department or equivalent such service is provided by the owner/operator of the site;

d) Adequate security is provided for the site and its operations on a 24-hour daily basis by security personnel and/or adequate security barriers to the site and its operations;

e) The proper materials will be available in adequate supply for constructing liners of disposal cells and for providing a compacted impermeable cover to prevent any seepage into the completed fill upon closure; and

f) Adequate professional competence and resources exist to design and construct the site, to operate the site for its approved period of operation, and to provide for closure and post-closure care to guarantee long-term protection of public health and the environment.

2.5.3 The geological and hydrological conditions of a site in which hazardous wastes are to be disposed shall be such that reasonable assurance is provided that such wastes are isolated within the designated disposal area of the site and away from natural environmental pathways that could expose the public for 1,000 years, or some demonstrated shorter period in which the wastes are transformed to an innocuous condition. Such assurance is to be based on the following considerations:

a) Geomorphic conditions either will not vary significantly from the present state or will occur to a predictable degree which can be accommodated in the facility design;

b) The immediate area of the site is in strata of minimal groundwater flow;

c) The geologic strata surrounding the site combined with engineered barriers included in the design shall provide a minimum permeability of 10 ^-7 cm/sec or equivalent of sufficient thickness between the disposal location and the nearest domestically or agriculturally useable aquifer to isolate any materials to be disposed therein;

d) The juxtaposition of the site and any free flowing or standing natural surface waters shall be such that disposal locations will not impact nor be impacted by such surface waters;

e) The terrain is such that good drainage exists for movement of precipitation away from the disposal area, and such that water and wind erosion will be minimal; and

f) The geochemical characteristics of the geologic strata at the site are compatible with the waste categories proposed to be disposed at the site especially in terms of providing high adsorption, absorption, or chemical fixation of any wastes that may migrate from the immediate areas where disposed.

2.5.4 The design of a hazardous waste disposal site shall, unless it is demonstrated to be unnecessary, include a liner the performance of which will comply with paragraphs 2.4.1, 2.4.2, 2.4.3, and 2.4.5 of these regulations, considering:

a) The physical and chemical characteristics of the waste in the facility, including any treatment of wastes to promote the immobilization of hazardous substances;

b) The pressure head of leachate on the liner under worst case conditions;

c) The permeability of the liner material at specified compaction density and moisture content where earthen materials are used;

d) The potential chemical reactions between the wastes and the liner material that could affect the integrity of the liner;

e) The physical and chemical properties of the soil underlying the facility that supports any emplaced liner; and

f) The potential for damage to the liner system that could occur during installation or planned use.

2.5.5 The design of each hazardous waste disposal site shall include a leachate and runoff control system which will provide compliance with Section 2.4 of these regulations, considering:

a) The physical and chemical characteristics of the waste in the facility:

b) Climatic conditions in the area, including precipitation events;

c) The volume of leachate or contaminated runoff that could be produced at the facility; and

d) The available options for managing any leachate or contaminated runoff that is collected at the facility.

2.5.6 The location of any facility for disposal or preparation for disposal of hazardous wastes shall be within a distance controlled by the owner/operator by an acceptable means to prevent adverse effects on the public health should unexpected discharges of hazardous waste occur.

6 CCR 1007-2.5

37 CR 17, September 10, 2014, effective 9/30/2014

37 CR 24, December 25, 2014, effective 1/14/2015

38 CR 11, June 10, 2015, effective 6/30/2015

38 CR 23, December 10, 2015, effective 12/30/2015

39 CR 23, December 10, 2016, effective 12/30/2016

39 CR 23, December 25, 2016, effective 12/30/2016

40 CR 05, March 10, 2017, effective 4/14/2017

40 CR 21, November 10, 2017, effective 1/1/2018

40 CR 21, November 10, 2017, effective 3/1/2018

41 CR 06, March 25, 2018, effective 4/14/2018

41 CR 11, June 10, 2018, effective 6/30/2018

41 CR 11, June 10, 2018, effective 7/15/2018

41 CR 24, December 25, 2018, effective 1/14/2019

42 CR 06, March 25, 2019, effective 4/14/2019

42 CR 11, June 10, 2019, effective 6/30/2019

42 CR 21, November 10, 2019, effective 11/30/2019

43 CR 06, March 25, 2020, effective 4/14/2020

43 CR 12, June 25, 2020, effective 7/15/2020

43 CR 18, September 25, 2020, effective 10/15/2020

43 CR 24, December 25, 2020, effective 1/14/2021

44 CR 24, December 25, 2021, effective 1/14/2022

45 CR 17, September 10, 2022, effective 9/30/2022

45 CR 23, December 10, 2022, effective 12/30/2022