COMPLIANCE INFO_AMENDED JTD 1/5/2026

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Permit Unit Requirements for N-4070-1-11 (continued) Page 4 of 14 PERMIT UNIT REQUIREMENTS CONTINUE ON NEXT PAGE These terms and conditions are part of the Facility-wide Permit to Operate. Facility Name: FOOTHILL SANITARY LANDFILL Location: 6484 N WAVERLY RD,LINDEN, CA 95236 N-4070-1-11 : 9/24/2025 3:25:45 PM -- ROBINSOM 39. Permittee shall keep for at least 5 years an up-to-date, readily accessible records of each wellhead temperature monitoring values greater than 55 degrees Celsius, each wellhead nitrogen level at or above 20 percent, each wellhead oxygen level at or above 5 percent, all enhanced monitoring activities as required by this permit, and the 24-hour high temperature report email transmission as required by this permit. [40 CFR 62.16726(e)(2) and 40 CFR 63.1983(e)(2)] Federally Enforceable Through Title V Permit 40. Permittee shall monitor nitrogen or oxygen concentration in the landfill gas on a monthly basis. [40 CFR 62.16722(a)(2) and 40 CFR 63.1961(a)(2)] Federally Enforceable Through Title V Permit 41. Nitrogen concentration in the landfill gas shall be determined using EPA Method 3C of appendix A-2 to 40 CFR Part 60, or an alternative method approved by the District and EPA. Oxygen concentration in the landfill gas shall be determined using a Landtec GEM gas meter or equal (portable gas composition analyzer or an oxygen meter). When using a portable gas analyzer, the analyzer shall be calibrated and meet all quality assurance and quality control requirements for EPA Method 3A of appendix A-2 to 40 CFR Part 60 or ASTM D6522-11. When using an oxygen meter, the meter shall use EPA Method 3A or 3C of appendix A-2 to 40 CFR Part 60 or ASTM D6522-11 except that: (1) The span shall be set between 10- and 12-percent oxygen, (2) A data recorder is not required, (3) Only two calibration gases are required, a zero and span, (4) A calibration error check is not required, and (5) The allowable sample bias, zero drift, and calibration drift are plus or minus 10 percent. [40 CFR 62.16722(a)(2) and 40 CFR 63.1961(a)(2)] Federally Enforceable Through Title V Permit 42. In the event that the collection or control system becomes inoperable, the gas mover equipment (as defined in 40 CFR 63.1990) shall be shut down and all valves in the collection and control system contributing to venting of landfill gas to the atmosphere shall be closed within one hour. Efforts to repair the collection or control system shall be initiated and completed in a manner such that downtime is kept at a minimum, and the collection and control system shall be returned to operate. [40 CFR Subpart AAAA 63.1958(e)] Federally Enforceable Through Title V Permit 43. A monitored exceedance of the operational requirements for wellhead pressure, wellhead temperature, or surface methane concentration shall not be deemed a deviation if the required corrective action(s), as required by this permit, are completed within the timelines as required by this permit. [40 CFR 63.1958(g)] Federally Enforceable Through Title V Permit 44. The landfill gas collection system shall be designed to handle the maximum expected gas flow rate from the entire area of the landfill that warrants control over the intended use period of the gas collection system, shall be designed to minimize off-site migration of subsurface gas, and shall collect gas at a sufficient extraction rate. [40 CFR Subpart AAAA 63.1959(b)(2)(ii)(B)] Federally Enforceable Through Title V Permit 45. Permittee 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. The collection system shall be operated such that gas is collected from each area, cell, or group of cells in the MSW landfill in which solid waste has been in place for 5 years or more if the area, cell, or group of cells is active or 2 years or more if the area, cell, or group of cells is closed or at final grade. [40 CFR 63.1958(a), 63.1959(b)(2)(ii)(B), and 63.1960(a)(2)] Federally Enforceable Through Title V Permit 46. Permittee shall monitor gauge pressure in the gas collection header applied to each individual well on a monthly basis. If positive pressure exists, action shall be initiated to correct the exceedance within 5 days, except under the conditions when positive pressure is allowed as provided in the condition that references 40 CFR 63.1958(b) in this permit. Any attempted corrective measure shall not cause exceedances of other operational or performance standards. If negative pressure cannot be achieved without excess air infiltration within 15 days of the initial exceedance, the owner or operator shall conduct a root cause analysis and correct the exceedance as soon as practicable, but no later than 60 days after the initial exceedance. If corrective actions cannot be completed within 60 days following the initial exceedance, the owner or operator shall also conduct a corrective action analysis and develop an implementation schedule to complete the necessary corrective action(s) as soon as practicable but no more than 120 days following the initial exceedance. [40 CFR 63.1960(a)(3) and 40 CFR 63.1961(a)(1)] Federally Enforceable Through Title V Permit