OAR 340-230-0310: Municipal Waste Combustors: Emissions Limitations

No person may cause, suffer, allow, or permit the operation of any affected municipal waste combustor unit in a manner that violates the following emission limits and requirements: (1) Before April 28, 2009, particulate matter emissions from each unit must not exceed 27 milligrams per dry standard cubic meter (0.012 grains per dry standard cubic foot) corrected to 7 percent oxygen. On and after April 28, 2009, particulate matter emissions from each unit must not exceed 25 milligrams per dry standard cubic meter (0.011 grains per dry standard cubic foot) corrected to 7 percent oxygen. (2) Opacity. The emission limit for opacity exhibited by the gases discharged to the atmosphere from a designated facility must not exceed 10 percent opacity as a 6-minute average. (3) Municipal Waste Combustor Metals: (a) Before April 28, 2009, cadmium emissions from each unit must not exceed 0.040 milligrams per dry standard cubic meter (0.000018 gr/dscf) corrected to 7 percent oxygen. On and after April 28, 2009, cadmium emissions from each unit must not exceed 0.020 milligrams per dry standard cubic meter (0.000008 gr/dscf) corrected to 7 percent oxygen. (b) Before April 28, 2009, lead emissions from each unit must not exceed 0.44 milligrams per dry standard cubic meter (0.00020 gr/dscf) corrected to 7 percent oxygen. On and after April 28, 2009, lead emissions from each unit must not exceed 0.20 milligrams per dry standard cubic meter (0.00009 gr/dscf) corrected to 7 percent oxygen. (c) Before April 28, 2009, mercury emissions from each unit must not exceed 0.080 milligrams per dry standard cubic meter (0.000035 gr/dscf) or 15 percent of the potential mercury emission concentration (an 85 percent reduction by weight), corrected to 7 percent oxygen, whichever is less stringent. On and after April 28, 2009, mercury emissions from each unit must not exceed 0.050 milligrams per dry standard cubic meter (0.000022 gr/dscf) or 15 percent of the potential mercury emission concentration (an 85-percent reduction by weight), corrected to 7 percent oxygen, whichever is less stringent. (4) Sulfur dioxide (SO2) emissions from each unit must not exceed 29 parts per million by volume or 25 percent of the potential sulfur dioxide emission concentration (75-percent reduction by weight or volume), corrected to 7 percent oxygen (dry basis), whichever is less stringent. Compliance with this emission limit is based on a 24-hour daily geometric mean. (5) Hydrogen chloride (HCl) emissions from each unit must not exceed 29 parts per million by volume or 5 percent of the potential hydrogen chloride emission concentration (95-percent reduction by weight or volume), corrected to 7 percent oxygen (dry basis), whichever is less stringent. (6) The dioxin/furan emissions from each unit must not exceed: (a) Before April 28, 2009, 60 nanograms per dry standard cubic meter (total mass), corrected to 7 percent oxygen, for a municipal waste combustor unit that employs an electrostatic precipitator-based emission control system; (b) On and after April 28, 2009, 35 nanograms per dry standard cubic meter (total mass), corrected to 7 percent oxygen, for a municipal waste combustor unit that employs an electrostatic precipitator-based emission control system; (c) Before April 28, 2009, 30 nanograms per dry standard cubic meter (total mass), corrected to 7 percent oxygen, for a municipal waste combustor unit that does not employ an electrostatic precipitator-based emission control system. On and after April 28, 2009, 15 nanograms per dry standard cubic meter (total mass), corrected to 7 percent oxygen, for a municipal waste combustor unit that does not employ an electrostatic precipitator-based emission control system. (7) Emissions of nitrogen oxides from each unit must not exceed 205 parts per million by volume on a dry basis corrected to 7 percent oxygen. (8) Fugitive Emissions: (a) No owner or operator may cause or allow visible emissions of combustion ash from an ash conveying system (including conveyor transfer points) in excess of 5 percent of the observation period (i.e., 9 minutes per 3-hour period), as determined by EPA Reference Method 22 observations, except as provided in subsections (b) and (c) of this section. (b) The emission limit specified in subsection (a) of this section does not cover visible emissions discharged inside buildings or enclosures of ash conveying systems; however, the emission limit specified in subsection (a) of this section does cover visible emissions discharged to the atmosphere from buildings or enclosures of ash conveying systems. (c) The provisions specified in subsection (a) of this section do not apply during maintenance and repair of ash conveying systems. [NOTE: View a PDF of referenced EPA Methods by clicking on "Tables" link below OAR 340-230-8010.]