§ 123.206. Compliance requirements for the emission standards for coal-fired EGUs.

 (a)  The owner or operator of one or more EGUs subject to the emission standards of §  123.205 (relating to emission standards for coal-fired EGUs) shall demonstrate compliance with the standards using one of the following methods:

   (1)  Compliance on a unit-by-unit basis.

   (2)  Facility-wide emissions averaging.

 (b)  The Department may approve in a plan approval or operating permit, or both, an alternate mercury emission standard or compliance schedule, or both, if the owner or operator of an EGU subject to the emission standards of §  123.205 demonstrates in writing to the Department’s satisfaction that the mercury reduction requirements are economically or technologically infeasible. The Department’s written approval of an alternate mercury emission standard or compliance schedule does not relieve the owner or operator of the EGU from complying with the other requirements of § §  123.201—123.205 and 123.207—123.215. The owner or operator shall:

   (1)  Submit a plan approval application or operating permit application requesting an alternate emission standard or compliance schedule, or both, to the Department for approval no later than 120 days before the applicable compliance deadline.

   (2)  Include the following in the application:

     (i)   A brief description, including make, model and location of each EGU.

     (ii)   A list of all air pollution control technologies and measures that have been installed on each EGU and are operating to control emissions of air contaminants including mercury.

     (iii)   The dates of installation and commencement of operation for each of the technologies and measures required under subparagraph (ii).

     (iv)   An explanation of how the technology or measure was installed and if it is being operated according to the manufacturer’s instructions for each of the technologies and measures required under subparagraph (ii).

     (v)   The results of each mercury stack test and other emissions measurements for the EGU following installation and commencement of operation of the air pollution control technologies and measures listed in accordance with subparagraph (ii).

     (vi)   A list of other air pollution control technologies or measures that the owner or operator proposes to install and operate on each EGU to control emissions of air contaminants including mercury.

     (vii)   A summary of how the owner or operator of the EGU intends to operate and maintain the unit during the term of the approved plan approval or operating permit, or both, including the associated air pollution control equipment and measures that are designed to maintain compliance with all other applicable plan approval or operating permit requirements and that are designed and operated to minimize the emissions of mercury to the extent practicable.

     (viii)   A proposed schedule that lists the increments of progress and the date for final compliance if an alternate compliance schedule is requested.

     (ix)   An emission reduction proposal and information on the technological feasibility of meeting the requirements of this section and §  123.205 if an alternate emission standard is requested.

     (x)   Other information which the Department requests that is necessary for the approval of the application.

 (c)  The Department’s written approval of an alternate emission standard or compliance schedule will be based on the information provided in the application submitted by the owner or operator of the EGU in accordance with subsection (b).

 (d)  For an EGU complying with the energy output-based mercury emission standards of §  123.205 (expressed in pounds of mercury per GWh), the actual mercury emission rate of the EGU for each 12-month rolling period, monitored in accordance with § §  123.210—123.215 and calculated as follows, may not exceed the applicable emission standard:

 ER = i=1 12 E_i ÷i=1 12 O_i

 Where:

 ER = Actual mercury emissions rate of the EGU for the particular 12-month rolling period, expressed in pounds per GWh.

 E_i = Actual mercury emissions of the EGU, in pounds, in an individual month in the 12-month rolling period, as determined in accordance with the monitoring provisions.

 O_i = Gross electrical output of the EGU, in GWhs, in an individual month in the 12-month rolling period.

 (e)  For an EGU complying with the percent control requirements of §  123.205, the actual control efficiency for mercury emissions achieved by the EGU for each 12-month rolling period, monitored in accordance with § §  123.210—123.215 and calculated as follows, shall meet or exceed the applicable efficiency requirement:

 CE = 100 * {1 – (i=1 12 Ei ÷i=1 12 Ii)}

 Where:

 CE = Actual control efficiency for mercury emissions of the EGU for the particular 12-month rolling period, expressed as a percent.

 E_i = Actual mercury emissions of the EGU, in pounds, in an individual month in the 12-month rolling period, as determined in accordance with the monitoring provisions of § §  123.210—123.215.

 I_i = Amount of mercury in the fuel fired in the EGU, in pounds, in an individual month in the 12-month rolling period, as determined in accordance with §  123.214 (relating to coal sampling and analysis for input mercury levels).

 (f)  The owner or operator of an EGU may demonstrate compliance with §  123.205 by means of facility-wide averaging that demonstrates that the actual mercury emissions from EGUs covered under the emissions averaging demonstration are less than the allowable mercury emissions from all EGUs covered by the demonstration on a rolling 12-month basis.

   The provisions of this §  123.206 issued under section 5(a)(1) of the Air Pollution Control Act (35 P. S. §  4005(a)(1)).

   The provisions of this §  123.206 adopted February 16, 2007, effective February 17, 2007, 37 Pa.B. 883.

   This section cited in 25 Pa. Code §  123.201 (relating to purpose); 25 Pa. Code §  123.202 (relating to definitions); 25 Pa. Code §  123.203 (relating to applicability); 25 Pa. Code §  123.205 (relating to emission standards for coal-fired EGUs); 25 Pa. Code §  123.207 (relating to annual emission standards for coal-fired EGUs); 25 Pa. Code §  123.209 (relating to petition process); 25 Pa. Code §  123.210 (relating to general monitoring and reporting requirements); 25 Pa. Code §  123.213 (relating to monitoring of gross electrical output); 25 Pa. Code §  123.214 (relating to coal sampling and analysis for input mercury levels); and 25 Pa. Code §  123.215 (relating to recordkeeping and reporting).