Oregon Administrative Rules › Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY › Division 239 - LANDFILL GAS EMISSIONS › Section 340-239-0110 - Gas Collection and Control System Requirements

Current through Register Vol. 63, No. 7, July 1, 2024
When required pursuant to OAR 340-239-0100  or 340-239-0400, the
				owner or operator of a landfill must comply with the gas collection and control
				system requirements, system operational standards, and well head sampling
				requirements in this rule.
(1) Design
			 Plan and Installation
(a) If a gas collection
			 and control system which meets the requirements of section (2) of this rule has
			 not been installed, the owner or operator of a landfill must submit a Design
			 Plan to DEQ within one year of becoming subject to this rule. The Design Plan
			 must satisfy the requirements described in subsection (c).
(b) If an owner or operator of a landfill is
			 modifying an existing gas collection and control system to meet the
			 requirements of this division, the owner or operator must submit an amended
			 Design Plan to DEQ that includes any necessary updates or addenda, in
			 accordance with OAR 340-239-0700(3)(j). The amended Design Plan must satisfy
			 the requirements described in subsection (c).
(c) At a minimum, the Design Plan must meet
			 all of the following requirements:
(A) The
			 Design Plan must be prepared and certified by a professional engineer. The
			 following issues must be addressed in the design: Depths of solid waste, solid
			 waste gas generation rates and flow characteristics, cover properties, gas
			 system expandability, leachate and condensate management, accessibility,
			 compatibility with filling operations, integration with closure end use, air
			 intrusion control, corrosion resistance, fill settlement, resistance to the
			 solid waste decomposition heat, and ability to isolate individual components or
			 sections for repair or troubleshooting without shutting down entire collection
			 system.
(B) The Design Plan must
			 provide for the control of the collected gas through the use of a gas
			 collection and control system meeting the requirements of OAR 340-239-0110(2)
 
			 or an alternative method approved pursuant to OAR 340-239-0500.
(C) The Design Plan must demonstrate that the
			 gas collection and control system is designed to handle the maximum expected
			 gas generation flow rate from the entire area of the landfill that warrants
			 control over the intended use period of the gas control system equipment. The
			 maximum expected gas generation flow rate must be calculated using the method
			 in OAR 340-239-0800(5)  or an alternative method approved pursuant to OAR
			 340-239-0500.
(D) The Design Plan
			 must include any proposed alternatives to the requirements, justification for
			 the need for any proposed alternatives, test methods, procedures, compliance
			 measures, monitoring, and recordkeeping or reporting requirements pursuant to
			 OAR 340-239-0500.
(E) The Design
			 Plan must include a description of potential mitigation measures to be used to
			 prevent the release of methane or other pollutants into the atmosphere during
			 the installation or preparation of wells, piping, or other equipment; during
			 repairs or the temporary shutdown of gas collection system components; or, when
			 solid waste is to be excavated and moved.
(F) For active landfills, the Design Plan
			 must identify areas of the landfill that are closed or inactive.
(G) The gas collection and control system
			 must be designed to collect gas at an extraction rate to comply with the
			 surface methane emission limits in OAR 340-239-0200, component leak standard in
			 OAR 340-239-0600(2)(c), and be sufficient to meet all operational and
			 performance standards in this division. The expected gas generation flow rate
			 from the landfill must be calculated pursuant to OAR 340-239-0800(5).
(H) The gas collection and control system
			 must be designed to maintain a negative pressure at all wellheads in the
			 collection system without causing air infiltration, including any wellheads
			 connected to the system as a result of expansion or excess surface
			 emissions.
(I) Any areas of the
			 landfill that contain only asbestos-containing waste, or nondecomposable solid
			 waste may be excluded from collection provided that the owner or operator
			 submits documentation to DEQ containing the nature of the waste, date of
			 deposition, location and amount of asbestos or non-decomposable solid waste
			 deposited in the area. This documentation may be included as part of the Design
			 Plan.
(J) The density of wells,
			 horizontal collectors, surface collectors, or other gas extraction devices
			 necessary to achieve compliance with section (2) of this rule.
(d) The owner or operator must
			 install and operate a gas collection and control system not later than 30
			 months after the date that the landfill is required to comply with this
			 rule.
(e) The owner or operator of
			 a controlled landfill must place each well or design component as specified in
			 the approved Design Plan. Following initial construction, the owner or operator
			 of a controlled landfill must install each new component no later than 60 days
			 after the date on which the area controlled by the well is required to be
			 controlled pursuant to this division.
(f) The owner or operator of a landfill
			 subject to this rule must operate, maintain and expand the gas collection
			 system in accordance with the procedures and schedules in the approved Design
			 Plan.