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Conditions for N-339-17-10 (continued) Page 5 of 9 4. Permittee shall operate the landfill gas collection system with negative pressurc at each wellhead except under the following conditions: (1) 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 be submitted with the arutual reports ass provided in 60.757(1)(1); (2) Use ora geomembrane or synthetic cover. The owner or operator shall develop acceptable pressure limits in the design (clan; (1) A decommissioned well. A well may experience a static positive pressurc Act shut down to accommodate for declining flows. All design changes shall be approved by the APCO. [40 Crit 60.753(b)] Federally Enforceable Through Title V Permit 55. Permittee shall operate each interior wellhead in the collection system with a landfill gas temperature less than 55 C and with either a nitrogen level less than 20 percent or an oxygen level less than 5 percent. The owner or operator may establish a higher operating temperature, nitrogen, or oxygen value at a ptanicular well. A higher operating value demonstration shall show supporting data that the elcvatcd parameter does not cause fires or significantly inhibit anaerobic decompositions by killing methanogens. [40 CYR 60.753(c)] Federally Enforccablc'Through "Title V Permit 56. The collection systeen shall be operated so that the methane wncentration is less than 500 parts per million above background at the surface of the landfill, and such that all collected gases arc vented to a control system designed and operated in compliance with § 60.752(b)(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 closed within I hour. [40 CFR 60.753(4), (e)] Federally Enforceable Through Title V Permit 57. If monitoring demonstrates that the operational rcquircments in paragraphs (b), (c), or (d) of section 60.753 are not met, wrrctstive action shall 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 exceedanee is not a violation of the operational requirements in this section. [40 CFR 60.753(8)] Federally Enforceable Through Title V Permit 58. For each interior wellhead, the nitrogen level shall be determined using Method 3C, unless an alternative test method is established as allowed by 60.752(bx2)(i) of this subpart. (40 CFR 60.753(c)(1)] Federally Enforceable Through Title V Permit 59. For each interior wellhead, unless an alternative test method is established 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) The span shall he sct 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 are required, a zero and span, and ambient air may be used as the span; (iv) A calibration error chuck is not required; (v) The allowable sample bias, zero drift, and calibration drift are 4: 10 percent. [40 CFR 60.753(c)(2)] Federally Enforceable Through Tithe V Permit 60. Permittee shall calculate the NMOL emission rate for purposes of determining when the collection and control system can be removed as provided in 40 CYR 60.752(b)(2)(v) by using the equation found in 40 CFR 60.754(b). [40 Celt 60.754(b)] Federally Enforceable Through Title V Permit 61. For the perfonnanec test required in 60.752(b)(2)(WXB), Method 25, 25C, or Method 18 of Appendix A must be used to detcrminu compliance with the 99 weight percent efficiency or the 20 ppmv outlet concentration level, unless another method to demonstrate compliance has been approved by the APCO as provided by 60.752(b)(2)(i)(13). Method 3 or 3A shall be used to determine oxygen for correcting the NMOC concentration as hexane to 3 percent. In cases where the outlet concentration is Tess than 50 ppm NMOC as carbon (S ppm NMOL as hexane), Method 25A should be used in place of Method 25. Tf using Method 19 of appendix A, the minimum list of compounds to be tested shall be those published in die most recent Compilation of Air Pollutant Emission Factors (AP -42). The following equation shall be used to calculate efficiency: (NMOCin - NMOCout)/NMOCin. "The District must be notified at least 30 days prior to any compliance source test, and a source test plan must be submitted for approval at leash. 15 days prior to testing. [District Rule 10111; 40 CFR 60.754(d)] Federally Enforceable Through Title: V Permit 62. For the purposes of calculating the maximum expecte! gas generation flow rate from the landfill to determine compliance with 60.752(h)(2)(ii)(A)(l ), one of the equations its Section 60.755(a)(1)(i) or (ii) or (iii) shall be used. [40 CYR 60.755(a)(1)] Fedtnally Enforceable Through Title V Perrnit 63. For the purposes of determining sufficient density of gas collectors for compliance with 60.752(b)(2)(ii)(A)(2), the owner or operator shalt 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 CONTINUF. ON NEXT PAGE 77F11•+0: Mq M!q/ f OaM1. �Rf./