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Conditions for N-339-17-10 (continued) 0 54. Page 5 of 9 Permittee shall uper+le the landfill gas collection system with negative pressure at titch wellhead except under tine following conditions: (I) A fire or increased well temperature, The owner or operator shall record instances when positive pressure occurs in efforts to avoid a fire. 'these records shall he submittal with the mutual reports ass provided in 60,757(1)(1); (2) Use of.t gconlembrane or synthetic cover. -the owner or operator shall develop acceptable pressure limits in the design plait; (1) A decommissioned well. A well may cKperiencc.+ sUltic positive pressure after shut down to accommodate for declining flows. All design changes shall be approved by the APCO. (40 CFR 60.753(b)) Federally ]enforceable Through Title V I'crmit 55. Pcrmiuce shall operate each interior wellhead in the collection system with a landfill gas temperature less thall 55 C mid with either a nit rogcn level less than 20 percent or an oxygen levet less than 5 percent. The owner or operator may establish a higher operating temperature, nitrogen, or oxygen value at a particul.0 well. A higher operating value cicnionstration shall show supporting data that the cicvatul parameter does not cause tires or significant ly inhibit anaerobic decompositions by killing methanogens. 140 CF1t 60 753(c)] Federally Ell foreeablc Through Ti tie V Permit 56. The collection system shall be operated so that the methane wncentralion is less than 500 parts per million abuvt: background at the surface of the landfill, and such that all collected gases are vcntcxl to it control system designed and operated in compliance with § 60,752(h)(2)(iii). In the event the collection or control system is inoperable, the gas mover system shall be shut down and all valves in the collection and control system contributing to venting of the gas to the atmosphere shall be closul within I hour [40 CFR 60.753(d), (e)] Federally Enforceable Through Title V Pennit 57. if monitoring denionstraws that the operational requirements is paragraphs (b), (c), or (d) of suction 60.753 are not MCI. currative action $)tall be taken as specified in 40 CFR 60,755(x)(3 • 5) or (c). If corrective actions are; taken as specified in 60.755, the monitored excecdance is not a violation of the operational requirements in this section. [40 CFR 60.753((;)] Fcderally Enforceable Through *1 itle V Pennit 58 For each interior wellhead, the nitrogen level shall be deternined using Methud 3C, unless an alternative test method is csteblished as allowed by 60.752(b)(2)(i) of this subpart. [40 CFR 60,753(c)(1)] Federally Enforceable Through 'I itle V Pennit 59. For each interior wellhead, unless un alternative test method is esuiblislted as allowed by 60.752(b)(2)(i) of this subpart, the oxygen shall be determined by an oxygen meter using Method 3A or 3C except that, (i) 'flee span shall he set so that the regulatory limit is between 20 and 50 percent of the span, (ii) A data recorder is not required; (iii) Only two calibration gases arc required, a aero and span, and ambient air may be used as Elie span; (iv) A calibration error ehcck is not required; (v) The allowable sample bias, zero drift, and calibration drift are i 10 percent. (40 CFR 60.753(c)(2)] Federally Enforceable Through Title V Pennit 60 Pennittee shall calculate the NMOL etuissioit rate for purposes of determining when the collection and control system can be removed as provided in 40 C! -'R 60.752(b)(2)(v) by using the equation fownd in 40 CFR 60.754(b). [40 CF1t 60.754(b)] Federally Enforceable Through Title V Permit 61. For Ilia performance; test required in 60.752(b)(2)(iiix8), Method 25, 25C, or Method 18 of Appendix A must be used to determine compliance with the 98 weight percent efficiency or the 20 ppmv outlet concentration level, unless another inethotl to demonstrate compliance has been approved by the APCO as provided by 60.752(b)(2)(i)(13)_ Mcihod 3 or 3A shall be used to determine oxygen for correcting the NMOC concentration a3 hexane to 3 peruent. to casts where the outlet concentration is less than 50 ppm NMOL as carbon (8 ppm NMOC as hexane). Method 25A should be used in place of Method 25. if using Method 18 of appendix A, the minimum list of tcompounds to be tested shall be those published in the most recent Compilation of Air Pollutant Emission Factors (AP -42). The following equation shall be used to calculate efficiency: (NMOCin-NMOCout)/NMOCin. The District mast be notified at (cast 30 days prior to any compliance source test, and a source lost plan must be submitted for approval at Icasl 15 days prior to testing [T SIHct Rule 1091; 40 CFR 60.754(4)] Federally Fnforceable Thruugh Title V Permit 62. For the purposes ofcalculating the maxiinurrt expeetul gas generation flow rate from the landfill to determine compliance with 60.752(h)(2)(ii)(A)(1), one of the equations in Scetion 60.755(a)(1)(i) or (ii) or (iii) shall be used. [40 CFR %755(a)(1)] Federally Enforceable Through Title V Pennit 61 For the purposes of determining sufEtcient density of gas collectors for compliance with 60-752(b)(2)(ii)(A)(2), the owner or operator shall design a system of vertical wells, horizontal collectors, or other collection devices, satisfactory to the APCO, capable of controlling and extracting gas from all portions of the landfill sufficient to meet all operational and performance standards. (40 CFR 60.755(a)(2)] Federally Enforceable Through Title V Permit CONDITIONS CONTINUE. ON NEXT PAGE