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Conditions for N-339-17-10 (continued) Page 9 of 9 93. Each owner or operator sucking to comply with 60.752(b)(2)(i)(A) shall construct the gas collection devices using the following equipment or procedures: (1) The Ustulfill gas extraction components shall be constructed of polyvinyl chloride (I'VC), high density polyethylene (HL)PE) pipe, fiberglass, stainless steel, or other nouporous corrosion resistant material of suitable dimensions to: convey projected amounts of gascs; withstand installation, static, and settlemcra forces; and withstand planned overburden or traffic loads. The collection system shall extend as necessary to comply with emission anti migration. standards. Collection dcviccs such as wells and horizontal collectors shall be perforated to allow gas entry without head loss sufficient to impair performance across the intended extent of contrnl. Perforations shall be situated with regard to the need to Prevent excessive air infiltration; (2) Vertical wells shall be placed so as not to endanger underlying liners and shall address the occurrence of water within the landfill, Holes and trenches constructed for pined wells and hurizoutal collectors shall be of sufficient cross-section so as to allow for their proper construction and completion including, for example, centering of pipes and placement of gravel backfill. Collection devices shall he designed so as not to allow indirect short circuiting of air into the cover or refuse into the collection system or gas into the air. Any gravel used around pipe perforations should be of a dimension so as not to penetrate or block perforations; (3) Collection devices may be connected to the collection header pipes below or shove the landfill surface. The connector assembly shall include a positive closing throttle valve, any necessary seals and couplings, access couplings and at least one sampling port. The collection devices Shall he constructed of PVC, 1•IDPE, fiberglass, stainless steel, or other nonporous material of suitable thickness. [40 CFR 60.759(b)] Fcdurally Enforceable'Through Title V Permit 94. Each owner or operator seeking to comply with 60.752(b)(2)(i)(A) shall convey the landfill gas to a control system in compliance with 60.752(b)(2)(iii) through the collection header pipe(s). The gas mover equipment shall be sized to handle the maximum gats generation flow rate expected over the intended use period of the gas moving equipment using the following procedures: (1) For existing collection systems, the flow data shall be used to project the maximum 'flow rate. If no flow data exists, the procedures in paragraph 60.759(e)(2) shall be used; (2) For new collection systems, the maximum flow rate shall be in accordance with 60.755(x)(1). [40 CTR 60.759(c)] Federally Enforceable Through Title V Permit ifN 73NIfM5: Mp v aw 5 WPM 11 M