6 Colo. Code Regs. § 1007-2-6

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

Section 6 CCR 1007-2-6 - INCINERATOR ASH DISPOSAL SITES AND FACILITIES

6.1GENERAL REQUIREMENTS FOR MANAGEMENT OF SOLID WASTE INCINERATOR ASH

6.1.1 In addition to applicable requirements in the preceding sections of these regulations, this Section 6 shall apply to the management and disposal of solid waste incinerator ash.

6.1.2 Solid waste incinerator ash must either be beneficially used or reused, as defined in paragraph 6.1.3, or finally disposed in accordance with paragraphs 6.1.4 through 6.2.10.

6.1.3 Beneficial use or reuse of solid waste incinerator ash must receive approval from both the Colorado Department of Health and the county. In order to constitute beneficial use the applicant must demonstrate:

(A) That the waste material can meet the same specifications as alternative non-waste materials; and

(B) That the beneficially used waste materials will not release contaminants into the environment.

6.1.4 Solid waste incinerator ash must be disposed of only at approved or designated solid waste disposal sites and facilities. Sites not approved to take solid waste incinerator ash on a continuous basis must receive approval from the Department and the local governing body having jurisdiction. A substantial change in operations may be required prior to accepting the residual ash for disposal at the facility.

6.1.5 All solid waste combustion ash and associated waste water and fugitive dust handling and disposal shall comply with all applicable laws and regulations, and with all applicable local zoning laws and ordinances.

6.1.6 Residual ash shall be dewatered to remove any free liquids prior to shipment to a disposal site. The ash residue must be wet enough so the surface of the ash remains damp after unloading at a landfill until soil cover material can be applied.

6.1.7 Transportation of ash shall occur in equipment designed and utilized to prevent leakage, spillage or dispersion of the material during transportation.

6.1.8 The ash must be covered daily or less frequently as approved by the Department considering factors such as the type of ash, the climate and hydrogeology of the site and size of the active area. In any regard, the ash must be covered at intervals sufficient to prevent infiltration of precipitation and fugitive dust problems from the ash.

6.2MUNICIPAL SOLID WASTE INCINERATOR ASH DISPOSAL STANDARDS

6.2.1 These regulations apply to the management and disposal of municipal solid waste incinerator ash, except as provided for in 6.2.2 for facilities in operation prior to adoption of these regulations.

6.2.2 Those sites and facilities in operation prior to adoption of these regulations, must comply with Sections 6.1 of these regulations and may be required to come into compliance with all other regulations in this section applicable to the management and disposal of municipal solid waste incinerator ash upon a determination by the Department that such sites and facilities may be causing impact of existing or future uses of surface or ground water.

6.2.3 Municipal solid waste incinerator ash must be disposed of in lined mono fills having leachate detection and collection systems. The Department may waive the requirement of mono filling on a case-by-case basis if, after taking into consideration factors such as ash volume, physical and chemical characteristics of the ash including toxicity, leaching potential and site characteristics, the operator can demonstrate that codisposal with solid waste would provide the degree of environmental protection equal to that provided by mono filling.

6.2.4 Plans and specifications for the liner and leachate collection system shall be included in the facility engineering report. The liner and leachate collection system must meet the following minimum standards:

6.2.5 The liner shall be constructed on a foundation or base capable of providing support to the liner and resistance to pressure gradients above and below the liner to prevent failure due to settlement, compression or uplift.

6.2.6 The liner shall consist of a minimum of 2 feet compacted clay below the leachate collection system, with 10⁷ cm/sec permeability or an equivalent liner which includes a synthetic material. The liner must be installed using quality control measures specified in the facility engineering report to ensure attainment of the design permeability and to prevent damage to the liner during construction and during the active life of the landfill.

6.2.7 The system for the collection of leachate shall conform to the following standards:

(A) Protective cover shall be provided which allows for the flow of any leachate generated by the ash to the collection layer; and prevents damage to the liner system.

(B) The collection system shall be designed to ensure that liquids and leachate will drain continuously from the protective cover to the collection sump or point without ponding or accumulating on the liner and shall have adequate provisions for maintenance and cleaning.

(C) The leachate collection and removal system must be constructed of materials that are:

(1) chemically resistant to the leachate which is expected to be generated and

(2) of sufficient strength and thickness to prevent collapse under the pressures exerted by the overlying ash, cover materials, and by equipment used at the landfill.

6.2.8 At least two (2) feet of compacted clay of 10⁷ cm/sec permeability and one foot of soil cover must be placed over the disposal site at closure. Final grades and cover design shall ensure proper drainage to prevent infiltration of water and provide stabilization to control erosion and maintain the integrity of the cap at closure.

6.2.9 A plan for monitoring of leachate in the collection system and procedures for handling, treatment and disposal must be contained in the facility operations report.

6.2.10 Monitoring of the leachate detection and collection system and groundwater monitoring shall continue through post closure for a minimum of twenty (20) years.

6 CCR 1007-2-6

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