Section 95464 - Gas Collection and Control System Requirements(a)Design Plan and Installation.(1)Design Plan: If a gas collection and control system which meets the requirements of either sections 95464(b)(1), 95464(b)(2) or 95464(b)(3) has not been installed, the owner or operator of a MSW landfill must submit a Design Plan to the Executive Officer within one year after the effective date of this subarticle, or within one year of detecting any leak on the landfill surface exceeding a methane concentration of 200 ppmv pursuant to section 95463(b)(2)(B). The Executive Officer must review and either approve or disapprove the Design Plan within 120 days. The Executive Officer may request that additional information be submitted as part of the review of the Design Plan. At a minimum, the Design Plan must meet the following requirements: (A) The Design Plan must be prepared and certified by a professional engineer.(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 either sections 95464(b)(1), 95464 (b(2) or 95464(b)(3).(C) The Design Plan must include any proposed alternatives to the requirements, test methods, procedures, compliance measures, monitoring, and recordkeeping or reporting requirements pursuant to section 95468.(D) 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.(E) For active MSW landfills, the design plan must identify areas of the landfill that are closed or inactive.(F) Design the gas collection and control system to handle the expected gas generation flow rate from the entire area of the MSW landfill and to collect gas at an extraction rate to comply with the surface methane emission limits in section 95465 and component leak standard in section 95464(b)(1)(B). The expected gas generation flow rate from the MSW landfill must be calculated pursuant to section 95471(e). 1. Any areas of the landfill that contain only asbestos-containing waste, inert waste, or non-decomposable solid waste may be excluded from collection provided that the owner or operator submits documentation to the Executive Officer containing the nature, 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.(2) Any owner or operator of an active MSW landfill must install and operate a gas collection and control system within 18 months after approval of the Design Plan.(3) Any owner or operator of a closed or inactive MSW landfill must install and operate a gas collection and control system within 30 months after approval of the Design Plan.(4) If an owner or operator is modifying an existing gas collection and control system to meet the requirements of this subarticle, the existing Design Plan must be amended to include any necessary updates or addenda, and must be certified by a professional engineer.(5) An amended Design Plan must be submitted to the Executive Officer within 90 days of any event that requires a change to the Design Plan.(6) The gas collection system must be operated, maintained, and expanded in accordance with the procedures and schedules in the approved Design Plan.(b)Gas Collection and Control System Requirements.(1)General Requirements. The owner or operator must satisfy the following requirements when operating a gas collection and control system: (A) Route the collected gas to a gas control device or devices, and operate the gas collection and control system continuously except as provided in sections 95464(d) and 95464(e).(B) Operate the gas collection and control system so that there is no landfill gas leak that exceeds 500 ppmv, measured as methane, at any component under positive pressure.(C) The gas collection system must be designed and operated to draw all the gas toward the gas control device or devices.(2)Requirements for Flares. An MSW landfill owner or operator who operates a flare must satisfy the following requirements: (A) Route the collected gas to an enclosed flare that meets the following requirements: 1. Achieves a methane destruction efficiency of at least 99 percent by weight.2. Is equipped with automatic dampers, an automatic shutdown device, a flame arrester, and continuous recording temperature sensors.3. During restart or startup there must be a sufficient flow of propane or commercial natural gas to the burners to prevent unburned collected methane from being emitted to the atmosphere.4. The gas control device must be operated within the parameter ranges established during the initial or most recent source test.(B) Route the collected gas to an open flare that meets the requirements of 40 CFR § 60.18 (as last amended 73 Fed.Reg. 78209 (December 22, 2008), which is incorporated by reference herein. The operation of an open flare is not allowed except under the following conditions: 1. An open flare installed and operating prior to August 1, 2008, may operate until January 1, 2018.2. Operation of an open flare on or after January 1, 2018, may be allowed if the owner or operator can demonstrate to the satisfaction of the Executive Officer that the landfill gas heat input capacity is less than 3.0 MMBtu/hr pursuant to section 95471(b) and is insufficient to support the continuous operation of an enclosed flare or other gas control device.3. The owner or operator is seeking to temporarily operate an open flare during the repair or maintenance of the gas control system, or while awaiting the installation of an enclosed flare, or to address offsite gas migration issues. a. Any owner seeking to temporarily operate an open flare must submit a written request to the Executive Officer pursuant to section 95468.(3)Requirements for Gas Control Devices other than Flares. An MSW landfill owner or operator who operates a gas control device other than a flare must satisfy one of the following requirements: (A) Route the collected gas to an energy recovery device, or series of devices that meets the following requirements: 1. Achieves a methane destruction efficiency of at least 99 percent by weight. Lean burn internal combustion engines must reduce the outlet methane concentration to less than 3,000 ppmv, dry basis, corrected to 15 percent oxygen.2. If a boiler or a process heater is used as the gas control device, the landfill gas stream must be introduced into the flame zone. Where the landfill gas is not the primary fuel for the boiler or process heater, introduction of the landfill gas stream into the flame zone is not required.3. The gas control device must be operated within the parameter ranges established during the initial or most recent source test.(B) Route the collected gas to a treatment system that processes the collected gas for subsequent sale or use. All emissions vented to the atmosphere from the gas treatment system are subject to the requirements of sections 95464(b)(2).(4)Source Test Requirements: The owner or operator must conduct an annual source test for any gas control device(s) subject to the requirements of sections 95464(b)(2)(A) or 95464(b)(3)(A) using the test methods identified in 95471(f). An initial source test must be conducted within 180 days of initial start up of the gas collection and control system. Each succeeding complete annual source test must be conducted no later than 45 days after the anniversary date of the initial source test. (A) If a gas control device remains in compliance after three consecutive source tests the owner or operator may conduct the source test every three years. If a subsequent source test shows the gas collection and control system is out of compliance the source testing frequency will return to annual.(c)Wellhead Gauge Pressure Requirement: Each wellhead must be operated under a vacuum (negative pressure), except as provided in sections 95464(d) and 95464(e), or under any of the following conditions:(1) Use of a geomembrane or synthetic cover. The owner or operator must develop acceptable pressure limits for the wellheads and include them in the Design Plan; or(2) A decommissioned well.(d)Well Raising: The requirements of sections 95464(b)(1)(A), 95464(b)(1)(B), and 95464(c), do not apply to individual wells involved in well raising provided the following conditions are met:(1) New fill is being added or compacted in the immediate vicinity around the well.(2) Once installed, a gas collection well extension is sealed or capped until the raised well is reconnected to a vacuum source.(e)Repairs and Temporary Shutdown of Gas Collection System Components: The requirements of sections 95464(b)(1)(A), 95464(b)(1)(B), and 95464(c), do not apply to individual landfill gas collection system components that must be temporarily shut down in order to repair the components, due to catastrophic events such as earthquakes, to connect new landfill gas collection system components to the existing system, to extinguish landfill fires, or to perform construction activities pursuant to section 95466, provided the following requirements are met: (1) Any new gas collection system components required to maintain compliance with this subarticle must be included in the most recent Design Plan pursuant to section 95464(a)(4).(2) Methane emissions are minimized during shutdown pursuant to section 95464(a)(1)(D).Cal. Code Regs. Tit. 17, § 95464
1. New section filed 6-17-2010; operative 6-17-2010 pursuant to Government Code section 11343.4 (Register 2010, No. 25). Note: Authority cited: Sections 38501, 38510, 38560, 38560.5, 38580, 39600 and 39601, Health and Safety Code. Reference: Sections 38501, 38505, 38510, 38550, 38551, 38560, 38560.5, 39003, 39500, 39600 and 39601, Health and Safety Code.
1. New section filed 6-17-2010; operative 6-17-2010 pursuant to Government Code section 11343.4 (Register 2010, No. 25).