NR 460.02(23e)(c)(c) Use of alternative calibration procedures that do not involve calibration gases or test cells. NR 460.02(23e)(d)(d) Use of an analytical technology that differs from that specified by a performance specification. NR 460.02(23e)(e)(e) Decreased monitoring frequency for a continuous emission monitoring system, continuous opacity monitoring system, predictive emission monitoring system or continuous parameter monitoring system. NR 460.02(23e)(f)(f) Decreased monitoring frequency for a leak detection and repair program. NR 460.02(23m)(23m) “Major alternative test method” means a federally enforceable test method with modifications that use technology or procedures not generally accepted by the scientific community or that is an entirely new method. These major modifications to a test method may be site-specific, or may apply to one or more sources or source categories, and will almost always set a national precedent. In order to be approved, a major modification shall be validated according to EPA Method 301 in Appendix A of 40 CFR part 63, incorporated by reference in s. NR 484.04 (25). Examples of major modifications to a test method include, but are not limited to: NR 460.02(23m)(c)(c) Use of a new test method developed to apply to a control technology not contemplated in the applicable regulation. NR 460.02(23m)(d)(d) Combining 2 or more sampling or analytical methods, at least one being unproven, into one for application to processes emitting multiple pollutants. NR 460.02(23s)(23s) “Major changes to recordkeeping and reporting” means: NR 460.02(23s)(a)(a) A modification to federally required recordkeeping or reporting that meets one of the following criteria: NR 460.02(23s)(a)1.1. May decrease the stringency of the required compliance and enforcement measures for the relevant standards. NR 460.02(23s)(b)(b) Examples of major changes to recordkeeping and reporting include, but are not limited to: NR 460.02(23s)(b)4.4. Decreases in the reliability of recordkeeping or reporting, such as manual recording of monitoring data instead of required automated or electronic recording or paper reports where electronic reporting may have been required. NR 460.02(24)(24) “Major source” means any stationary source or group of stationary sources located within a contiguous area and under common control that emits or has the potential to emit considering controls, in the aggregate, 10 tons per year or more of any hazardous air pollutant or 25 tons per year or more of any combination of hazardous air pollutants, unless the administrator establishes a lesser quantity, or in the case of radionuclides, different criteria from those specified in this definition. NR 460.02(24c)(24c) “Malfunction” means any sudden, infrequent and not reasonably preventable failure of air pollution control and monitoring equipment, process equipment, or a process to operate in a normal or usual manner which causes, or has the potential to cause, the emission limitations in an applicable standard to be exceeded. Failures that are caused in part by poor maintenance or careless operation are not malfunctions. NR 460.02(24e)(a)(a) Federally required monitoring with modifications that meet all of the following criteria: NR 460.02(24e)(a)1.1. Do not decrease the stringency of the compliance and enforcement measures for the relevant standard. NR 460.02(24e)(a)3.3. Are site-specific, made to reflect or accommodate the operational characteristics, physical constraints or safety concerns of an affected source. NR 460.02(24e)(b)(b) Examples of minor modifications to monitoring include, but are not limited to: NR 460.02(24e)(b)1.1. Modifications to a sampling procedure, such as use of an improved sample conditioning system to reduce maintenance requirements.