Section 250-RICR-120-05-43.8 - Emission StandardsA generator's emissions of nitrogen oxides (NOX), particulate matter (PM), carbon monoxide (CO), and carbon dioxide (CO2) under full load design conditions or at the load conditions specified by the applicable testing methods shall not exceed the standards set out in §§ 43.8.1 and 43.8.2 of this Part. A generator shall meet the applicable emission standards in effect on the date that the unit is installed.
43.8.1Emergency GeneratorsA. Emergency generators may be operated up to a maximum of five hundred (500) hours per year for maintenance, testing, and emergencies.B. Emergency generators shall not be operated in conjunction with any voluntary demand-reduction program or any other interruptible power supply arrangement with a utility, other market participant or system operator.C. Emergency generators must meet the emissions standards set by the US EPA for nonroad engines in 40 C.F.R. § 89, incorporated in § 43.4(A) of this Part, as follows: 1. | Installed on or after May 15, 2007: |
a. | Rated power 37 <= kW < 75: | Tier 2 |
b. | Rated power 75 <= kW < 130: | Tier 2 |
c. | Rated power 130 <= kW < 225: | Tier 2 |
d. | Rated power 225 <= kW <= 2237: | Tier 2 |
e. | Rated power > 2237 kW: | Tier 1 |
2. | Installed on or after January 1, 2009: |
a. | Rated power 37 <= kW < 75: | Tier 3 |
b. | Rated power 75 <= kW < 130: | Tier 3 |
c. | Rated power 130 <= kW < 225: | Tier 3 |
d. | Rated power 225 <= kW <= 560: | Tier 3 |
e. | Rated power 560 < kW <= 2237: | Tier 2 |
f. | Rated power > 2237 kW: | Tier 1 |
3. | Installed on or after January 1, 2012: |
a. | Rated power 37 <= kW < 75: | Tier 3 |
b. | Rated power 75 <= kW < 130: | Tier 3 |
c. | Rated power 130 <= kW < 225: | Tier 3 |
d. | Rated power 225 <= kW <= 560: | Tier 3 |
e. | Rated power 560 < kW <= 2237: | Tier 2 |
f. | Rated power > 2237 kW: | Tier 2 |
D. Carbon dioxide emissions from the emergency generator shall not exceed 1900 lbs/MWh.E. The sulfur content of any liquid fuel burned in the emergency generator shall not exceed 15 ppm (0.0015%) by weight.F. The sulfur content of any gaseous fuel burned in the emergency generator shall not exceed ten (10) grains total sulfur per one hundred (100) dry standard cubic feet.G. Visible emissions from the emergency generator shall not exceed ten percent (10%) opacity except for a period or periods aggregating no more than three (3) minutes in any one (1) hour. This visible emission limitation shall not apply during startup of an emergency generator. Startup shall be defined as the first ten (10) minutes of firing following the initiation of firing.43.8.2 Distributed GeneratorsA. Nitrogen oxides emission standards for distributed generators are as follows: 1. Installed on or after May 15, 2007: 0.6 lbs/MWh2. Installed on or after January 1, 2009: 0.3 lbs/MWh3. Installed on or after January 1, 2012: 0.15 lbs/MWhB. Carbon monoxide emission standards for distributed generators are as follows: 1. Installed on or after May 15, 2007: 10 lbs/MWh2. Installed on or after January 1, 2009: 2 lbs/MWh3. Installed on or after January 1, 2012: 1 lbs/MWh C. Carbon dioxide emissions standards for distributed generators are as follows: 1. Installed on or after May 15, 2007: 1,900 lbs/MWh2. Installed on or after January 1, 2009: 1,900 lbs/MWh3. Installed on or after January 1, 2012: 1,650 lbs/MWh D. Particulate matter emissions standards for distributed generators that are reciprocating engines, when firing a liquid fuel, are as follows: 1. Installed on or after May 15, 2007: 0.7 lbs/MWh2. Installed on or after January 1, 2009: 0.07 lbs/MWh3. Installed on or after January 1, 2012: 0.03 lbs/MWhE. The sulfur content of any liquid fuel burned in the distributed generator shall not exceed 15 ppm (0.0015%) by weight. F. The sulfur content of any gaseous fuel burned in the distributed generator shall not exceed ten (10) grains total sulfur per one hundred (100) dry standard cubic feet.G. Visible emissions from the distributed generator shall not exceed ten percent (10%) opacity except for a period or periods aggregating no more than three (3) minutes in any one (1) hour. This visible emission limitation shall not apply during startup of a distributed generator. Startup shall be defined as the first ten (10) minutes of firing following the initiation of firing.43.8.3Dual-Fuel Distributed GeneratorsA. Dual-fuel distributed generators must meet all applicable emission standards of this section when firing a gaseous fuel.B. The emission standards of this section do not apply when a dual fuel distributed generator is firing a liquid fuel. Such generators may operate no more than thirty (30) days per year firing a liquid fuel.C. The liquid fuel must meet the sulfur content requirements of §43.8.2(E) of this Part.43.8.4Existing Emergency GeneratorsOwners/operators of emergency generators with a minor source permit issued prior to the effective date of this regulation, shall not operate the emergency generator in conjunction with any voluntary demand-reduction program or any other interruptible power supply arrangement with a utility, other market participant or system operator.
250 R.I. Code R. 250-RICR-120-05-43.8
Amended effective 1/13/2019