Activity requirements, s. 20.21 (1) (c) of the Act
 10. (1) For the purposes of clause 20.21 (1) (c) of the Act, a person who engages in an activity prescribed by section 8 of this Regulation shall ensure that the following requirements in respect of the standby power system are complied with: 1. Each component of the system shall be used, operated and maintained in a manner that satisfies the recommendations of the manufacturer of the component. 2. The system shall be used and operated only for the provision of electrical power during power outages or involuntary power reductions or for testing or performing maintenance on the system in accordance with subsection (2). 3. Subject to subsection (3), the exhaust stacks that discharge contaminants, other than noise, from the system into the air shall be oriented vertically and shall be free of any impediments that would prevent the flow of the emissions. 4. Subject to subsection (3), each generator unit that is part of the system shall, i. if the unit uses diesel or biodiesel as fuel, have been specified by the manufacturer of the unit to, at a minimum, conform to the Tier 1 Emission Standards set out in Table 1 of 40 CFR 89.112 (United States), and ii. if the unit uses propane or natural gas as fuel, A. have been designed by the manufacturer to discharge a maximum of 9.2 grams of nitrogen oxides per kilowatt hour, or B. be equipped with pollution control equipment specified by the manufacturer to limit the discharge of nitrogen oxides to a maximum of 9.2 grams per kilowatt hour. 5. Subject to subsection (3), if a generator unit that is part of the system is located outside a building or structure and the unit has a sound pressure level, as specified by the manufacturer of the unit, that is greater than 75 decibels (A-weighted) at a distance of seven metres from the unit, measures shall be taken to provide sufficient sound attenuation to reduce the sound from the unit to a maximum sound pressure level of 75 decibels (A-weighted) at a distance of seven metres from the unit. 6. Subject to subsection (3), if a generator unit that is part of the system is located inside a building or structure and the unit has a sound pressure level, as specified by the manufacturer of the unit, that is greater than 75 decibels (A-weighted) at a distance of seven metres from the unit, i. sound attenuation measures shall be installed in the cooling air intake and exhaust openings in the room housing the unit that are capable of providing sufficient sound attenuation to reduce the sound from the openings by not less than the insertion loss levels set out in Column 2 of Table 1 of this subsection for the octave band centre frequency set out opposite in Column 1 of that Table, ii. the unit’s engine combustion exhaust muffler shall be capable of providing sufficient sound attenuation to reduce the sound from the exhaust stack by not less than the insertion loss levels set out in Column 2 of Table 2 of this subsection for the octave band centre frequency set out opposite in Column 1 of that Table, and iii. all external doors to the room housing the unit shall be set in a door jamb fitted with dual solid neoprene gaskets along the perimeter, shall be capable of providing a minimum sound transmission class rating of 35, measured in accordance with the standards referenced in Sentence 5.9.1.1.(1) of Ontario Regulation 332/12 (Building Code) made under the Building Code Act, 1992, and shall be composed of, A. solid slab wood of a minimum thickness of 50 millimetres, or B. steel skin with a glass fibre insulated core. 7. If the person receives a complaint with respect to the system and the complaint relates to the natural environment, the district manager of the Ministry for the district in which the system is located shall be notified of the complaint no later than two business days after the complaint is received. Table 1   Sound reduction from Cooling air Intake and exhaust openings  Item   Column 1   Octave band centre frequency (Hertz)   Column 2   Insertion loss (decibels) 

  1.   125   10 

  2.   250   12 

  3.   500   14 

  4.   1000   15 

  5.   2000   15 

  6.   4000   15 Table 2   Sound reduction from engine combustion exhaust Stacks  Item   Column 1   Octave band centre frequency (Hertz)   Column 2   Insertion loss (decibels) 

  1.   125   23 

  2.   250   29 

  3.   500   30 

  4.   1000   28 

  5.   2000   22 

  6.   4000   21 O. Reg. 346/12, s. 10 (1); O. Reg. 332/13, s. 1. (2) For the purposes of paragraph 2 of subsection (1), testing or performing maintenance on the standby power system shall meet the following requirements: 1. The system shall be used and operated for the purpose of testing or performing maintenance for a maximum of 60 hours in any 12-month period. 2. The system shall be used and operated for the purpose of testing or performing maintenance only between the hours of 7 a.m. and 7 p.m. 3. When the system is used and operated for the purpose of testing or performing maintenance, the air intakes, doors and windows of any buildings or structures located on the same site as the system shall be closed, if doing so would reduce the likelihood of emissions from the system entering the building or structure. 4. If more than one generator unit is part of the system, only one unit shall be used and operated at any time for the purpose of testing or performing maintenance. 5. If the Ministry issues a smog advisory that identifies an area in which the system is located, the system shall not be used or operated for the purpose of testing or performing maintenance until a termination notice with respect to the advisory has been issued for that area. O. Reg. 346/12, s. 10 (2). (3) If a person engages in an activity prescribed by section 8 with respect to a standby power system and an environmental compliance approval was in effect in respect of the standby power system on October 31, 2011, (a) paragraph 3 of subsection (1) does not apply in respect of an exhaust stack that was part of the system at the time the approval was issued, unless a change has been made to the stack since the time the approval was issued; and (b) paragraphs 4, 5 and 6 of subsection (1) do not apply in respect of a generator unit that was part of the system at the time the approval was issued. O. Reg. 346/12, s. 10 (3).