Subpart 204-8: Monitoring and Reporting

(Statutory authority: Environmental Conservation Law, §§ 1-0101, 3-0301, 19-0103,19-0105, 19-0305, 19-0311)

[Filed 1/26/00. Effective 30 days after filing.]

[This is page 1 of 1 of this Subpart. A complete list of Subparts in this regulation appears in the Chapter 3 contents page. A list of sections in this Subpart appears below.]

For administrative information about this posting, contact: Division of Air Resources. The Bureau of Air Quality Planning at (518) 402-8396 or the Bureau of Stationary Sources at (518) 402-8403 is the contact for technical questions pertaining to this rule.

§204-8.1 General requirements

The owners and operators, and to the extent applicable, the NO_x authorized account representative of a NO_x budget unit, shall comply with the monitoring and reporting requirements as provided in this Subpart and in subpart H of 40 CFR part 75. For purposes of complying with such requirements, the definitions in section 204-1.2 of this Part and in 40 CFR 72.2 shall apply, and the terms "affected unit," "designated representative," and "continuous emission monitoring system" (or "CEMS") in 40 CFR part 75 shall be replaced by the terms "NO_x budget unit," "NO_x authorized account representative," and "continuous emission monitoring system" (or "CEMS"), respectively, as defined in section 204-1.2 of this Part.

(a) Requirements for installation, certification, and data accounting. The owner or operator of each NO_x budget unit must meet the following requirements. These provisions also apply to a unit for which an application for a NO_x budget opt-in permit is submitted and not denied or withdrawn, as provided in Subpart 204-9 of this Part:

(1) Install all monitoring systems required under this Subpart for monitoring NO_x mass. This includes all systems required to monitor NO_x emission rate, NO_x concentration, heat input, and flow, in accordance with 40 CFR 75.71 and 75.72.

(2) Install all monitoring systems for monitoring heat input, if required under section 204-8.7 of this Subpart for developing NO_x allowance allocations.

(3) Successfully complete all certification tests required under section 204-8.2 of this Subpart and meet all other provisions of this Subpart and 40 CFR part 75 applicable to the monitoring systems under paragraphs (1) and (2) of this subdivision.

(4) Record and report data from the monitoring systems under paragraphs (1) and (2) of this subdivision.

(b) Compliance dates. The owner or operator must meet the requirements of paragraphs (a)(1) through (3) of this section on or before the following dates and must record and report data on and after the following dates:

(1) NO_x budget units under section 204-1.4 of this Part that commence operation before January 1, 2002, must comply with the requirements of this Subpart by May 1, 2002.

(2) NO_x budget units under section 204-1.4 of this Part that commence operation on or after January 1, 2002 and that report on an annual basis under section204-8.5(d) of this Subpart must comply with the requirements of this Subpart by the later of the following dates:

(i) May 1, 2002; or

(ii) the earlier of:

(a) 180 days after the date on which the unit commences operation; or

(b) for units under section 204-1.4(a)(1) of this Part, 90 days after the date on which the unit commences commercial operation.

(3) NO_x budget units under section 204-1.4 of this Part that commence operation on or after January 1, 2002 and that report on a control season basis under section 204-8.5(d) of this Subpart must comply with the requirements of this Subpart by the later of the following dates:

(i) the earlier of

(a) 180 days after the date on which the unit commences operation; or

(b) for units under section 204-1.4(a)(1) of this Part, 90 days after the date on which the unit commences commercial operation;

(ii) however, if the applicable deadline under subparagraph (i) of this paragraph does not occur during a control period, May 1st, immediately following the date determined in accordance with subparagraph (i) of this paragraph.

(4) For a NO_x budget unit with a new stack or flue for which construction is completed after the applicable deadline under paragraph (1) or (2) of this subdivision or Subpart 204-9 of this Part:

(i) 90 days after the date on which emissions first exit to the atmosphere through the new stack or flue;

(ii) however, if the unit reports on a control season basis under section 204-8.5(d) of this Subpart and the applicable deadline under subparagraph (i) of this paragraph does not occur during the control period, May 1st immediately following the applicable deadline in subparagraph (i) of this paragraph.

(5) For a unit for which an application for a NO_x budget opt in permit is submitted and not denied or withdrawn, the compliance dates specified under Subpart 204-9 of this Part.

(c) Reporting data prior to initial certification. The owner or operator of a NO_x budget unit under paragraph (b)(2) or (3) of this section must determine, record and report NO_xmass, heat input (if required for purposes of allocations) and any other values required to determine NO_x mass (e.g. NO_x emission rate and heat input or NO_x concentration and stack flow) using the provisions of 40 CFR 75.70(g), from the date and hour that the unit starts operating until all required certification tests are successfully completed.

(d) Prohibitions. (1) No owner or operator of a NO_x budget unit or a non-NO_x budget unit monitored under 40 CFR 75.72(b)(2)(ii) shall use any alternative monitoring system, alternative reference method, or any other alternative for the required continuous emission monitoring system without having obtained prior written approval in accordance with section 204-8.6 of this Subpart.

(2) No owner or operator of a NO_x budget unit or a non-NO_x budget unit monitored under 40 CFR 75.72(b)(2)(ii) shall operate the unit so as to discharge, or allow to be discharged, NO_x emissions to the atmosphere without accounting for all such emissions in accordance with the applicable provisions of this Subpart and 40 CFR part 75 except as provided for in 40 CFR 75.74.

(3) No owner or operator of a NO_x budget unit or a non-NO_x budget unit monitored under 40 CFR 75.72(b)(2)(ii) shall disrupt the continuous emission monitoring system, any portion thereof, or any other approved emission monitoring method, and thereby avoid monitoring and recording NO_x mass emissions discharged into the atmosphere, except for periods of recertification or periods when calibration, quality assurance testing, or maintenance is performed in accordance with the applicable provisions of this Subpart and 40 CFR part 75 except as provided for in 40 CFR 75.74.

(4) No owner or operator of a NO_x budget unit or a non-NO_x budget unit monitored under 40 CFR 75.72(b)(2)(ii) shall permanently discontinue use of the continuous emission monitoring system, any component thereof, or any other approved emission monitoring system under this Subpart, except under any one of the following circumstances:

(i) the owner or operator is monitoring emissions from the unit with another certified monitoring system approved, in accordance with the applicable provisions of this Subpart and 40 CFR Part 75, by the department for use at that unit that provides emission data for the same pollutant or parameter as the discontinued monitoring system; or

(ii) The NO_x authorized account representative submits notification of the date of certification testing of a replacement monitoring system in accordance with section 204-8.2(b)(2) of this Subpart.

§204-8.2 Initial certification and recertification procedures

(a) The owner or operator of a NO_x budget unit that is subject to an acid rain emissions limitation shall comply with the initial certification and recertification procedures of 40 CFR part 75, except that:

(1) if, prior to January 1, 1998, the administrator approved a petition under 40 CFR 75.17(a) or (b) for apportioning the NO_x emission rate measured in a common stack or a petition under 40 CFR 75.66 for an alternative to a requirement in 40 CFR 75.17, the NO_x authorized account representative shall resubmit the petition to the administrator under section 204-8.6(a) of this Subpart to determine if the approval applies under the NO_x Budget Trading Program; and

(2) for any additional CEMS required under the common stack provisions in 40 CFR 75.72, or for any NO_x concentration CEMS used under the provisions of 40 CFR 75.71(a)(2), the owner or operator shall meet the requirements of subdivision (b) of this section.

(b) The owner or operator of a NO_x budget unit that is not subject to an acid rain emissions limitation shall comply with the following initial certification and recertification procedures, except that the owner or operator of a unit that qualifies to use the low mass emissions excepted monitoring methodology under 40 CFR 75.19 shall also meet the requirements of subdivision (c) of this section and the owner or operator of a unit that qualifies to use an alternative monitoring system under subpart E of 40 CFR part 75 shall also meet the requirements of subdivision (d) of this section. The owner or operator of a NO_x budget unit that is subject to an acid rain emissions limitation, but requires additional CEMS under the common stack provisions in 40 CFR 75.72, or that uses a NO_x concentration CEMS under 40 CFR 75.71(a)(2) also shall comply with the following initial certification and recertification procedures.

(1) Requirements for initial certification. The owner or operator shall ensure that each monitoring system required by subpart H of 40 CFR part 75 (which includes the automated data acquisition and handling system) successfully completes all of the initial certification testing required under 40 CFR 75.20. The owner or operator shall ensure that all applicable certification tests are successfully completed by the deadlines specified in section 204-8.1(b) of this Subpart. In addition, whenever the owner or operator installs a monitoring system in order to meet the requirements of this Part in a location where no such monitoring system was previously installed, initial certification according to 40 CFR 75.20 is required.

(2) Requirements for recertification. Whenever the owner or operator makes a replacement, modification, or change in a certified monitoring system that the administrator or the department determines significantly affects the ability of the system to accurately measure or record NO_x mass emissions or heat input or to meet the requirements of 40 CFR 75.21 or appendix B to 40 CFR part 75, the owner or operator shall recertify the monitoring system according to 40 CFR 75.20(b). Furthermore, whenever the owner or operator makes a replacement, modification, or change to the flue gas handling system or the unit's operation that the administrator or the department determines to significantly change the flow or concentration profile, the owner or operator shall recertify the continuous emissions monitoring system according to 40 CFR 75.20(b). Examples of changes which require recertification include: replacement of the analyzer, change in location or orientation of the sampling probe or site, or changing of flow rate monitor polynomial coefficients.

(3) Certification approval process for initial certifications and recertification.

(i) Notification of certification. The NO_x authorized account representative shall submit to the department and the EPA Region 2 Office a written notice of the dates of certification in accordance with section 204-8.4 of this Subpart.

(ii) Certification application. The NO_x authorized account representative shall submit to the department a certification application for each monitoring system required under subpart H of 40 CFR part 75. A complete certification application shall include the information specified in subpart H of 40 CFR part 75.

(iii) Except for units using the low mass emission excepted methodology under 40 CFR 75.19, the provisional certification date for a monitor shall be determined using the procedures set forth in 40 CFR 75.20(a)(3). A provisionally certified monitor may be used under the NO_x Budget Trading Program for a period not to exceed 120 days after receipt by the department of the complete certification application for the monitoring system or component thereof under subparagraph (ii) of this paragraph. Data measured and recorded by the provisionally certified monitoring system or component thereof, in accordance with the requirements of 40 CFR part 75, will be considered valid quality-assured data (retroactive to the date and time of provisional certification), provided that the department does not invalidate the provisional certification by issuing a notice of disapproval within 120 days of receipt of the complete certification application by the department.

(iv) Certification application formal approval process. The department will issue a written notice of approval or disapproval of the certification application to the owner or operator within 120 days of receipt of the complete certification application under subparagraph (ii) of this paragraph. In the event the department does not issue such a notice within such 120-day period, each monitoring system which meets the applicable performance requirements of 40 CFR Part 75 and is included in the certification application will be deemed certified for use under the NO_x Budget Trading Program.

(a) Approval notice. If the certification application is complete and shows that each monitoring system meets the applicable performance requirements of 40 CFR part 75, then the department will issue a written notice of approval of the certification application within 120 days of receipt.

(b) Incomplete application notice. A certification application will be considered complete when all of the applicable information required to be submitted under subparagraph (ii) of this paragraph has been received by the department. If the certification application is not complete, then the department will issue a written notice of incompleteness that sets a reasonable date by which the NO_x authorized account representative must submit the additional information required to complete the certification application. If the NO_x authorized account representative does not comply with the notice of incompleteness by the specified date, then the department may issue a notice of disapproval under clause (c) of this subparagraph.

(c) Disapproval notice. If the certification application shows that any monitoring system or component thereof does not meet the performance requirements of this Part, or if the certification application is incomplete and the requirement for disapproval under clause (b) of this subparagraph has been met, the department will issue a written notice of disapproval of the certification application. Upon issuance of such notice of disapproval, the provisional certification is invalidated by the department and the data measured and recorded by each uncertified monitoring system or component thereof shall not be considered valid quality-assured data beginning with the date and hour of provisional certification. The owner or operator shall follow the procedures for loss of certification in subparagraph (v) of this paragraph for each monitoring system or component thereof which is disapproved for initial certification.

(d) Audit decertification. The department may issue a notice of disapproval of the certification status of a monitor in accordance with section 204-8.3(b) of this Subpart.

(v) Procedures for loss of certification. If the department issues a notice of disapproval of a certification application under clause (iv)(c) of this paragraph or a notice of disapproval of certification status under clause (iv)(d) of this paragraph, then:

(a) the owner or operator shall substitute the following values, for each hour of unit operation during the period of invalid data beginning with the date and hour of provisional certification and continuing until the time, date, and hour specified under 40 CFR 75.20(a)(5)(i):

(1) for units using or intending to monitor for NO_x emission rate and heat input or for units using the low mass emission excepted methodology under 40 CFR 75.19, the maximum potential NO_x emission rate and the maximum potential hourly heat input of the unit;

(2) for units intending to monitor for NO_x mass emissions using a NO_x pollutant concentration monitor and a flow monitor, the maximum potential concentration of NO_x and the maximum potential flow rate of the unit under section 2.1 of appendix A of 40 CFR part 75;

(b) the NO_x authorized account representative shall submit to the department a notification of certification retest dates and a new certification application in accordance with subparagraphs (i) and (ii) of this paragarph; and

(c) the owner or operator shall repeat all certification tests or other requirements that were failed by the monitoring system, as indicated in the department's notice of disapproval, no later than 30 unit operating days after the date of issuance of the notice of disapproval.

(c) Initial certification and recertification procedures for low mass emission units using the excepted methodologies under 40 CFR 75.19. The owner or operator of a gas-fired or oil-fired unit using the low mass emissions excepted methodology under 40 CFR 75.19 shall meet the applicable general operating requirements of 40 CFR 75.10, the applicable requirements of 40 CFR 75.19, and the applicable certification requirements of this section, except that the excepted methodology shall be deemed provisionally certified for use under the NO_x Budget Trading Program, as of the following dates:

(1) for units that are reporting on an annual basis under section 204-8.5(d) of this Subpart:

(i) for a unit that has commences operation before its compliance deadline under subdivision (b) of this section, from January 1st of the year following submission of the certification application for approval to use the low mass emissions excepted methodology under 40 CFR 75.19 until the completion of the period for the department review; or

(ii) for a unit that commences operation after its compliance deadline under subdivision (b) of this section, the date of submission of the certification application for approval to use the low mass emissions excepted methodology under 40 CFR 75.19 until the completion of the period for department review; or

(2) for units that are reporting on a control period basis under section 204-8.5(b)(3)(ii) of this Subpart:

(i) for a unit that commenced operation before its compliance deadline under subdivision (b) of this section, where the certification application is submitted before May 1st, from May 1st of the year of the submission of the certification application for approval to use the low mass emissions excepted methodology under 40 CFR 75.19 until the completion of the period for the department review;

(ii) for a unit that commenced operation before its compliance deadline under subdivision (b) of this section, where the certification application is submitted after May 1st, from May 1st of the year following submission of the certification application for approval to use the low mass emissions excepted methodology under 40 CFR 75.19 until the completion of the period for the department review;

(iii) for a unit that commences operation after its compliance deadline under subdivision (b) of this section, where the unit commences operation before May 1st, from May 1st of the year that the unit commenced operation, until the completion of the period for the department's review; or

(iv) for a unit that has not operated after its compliance deadline under subdivision (b) of this section, where the certification application is submitted after May 1st, but before October 1st, from the date of submission of a certification application for approval to use the low mass emissions excepted methodology under 40 CFR 75.19 until the completion of the period for the department's review.

(d) Certification/recertification procedures for alternative monitoring systems. The NO_x authorized account representative representing the owner or operator of each unit applying to monitor using an alternative monitoring system approved by the administrator and, if applicable, the department under subpart E of 40 CFR part 75 shall apply for certification to the department prior to use of the system under the NO_x trading program. The NO_x authorized account representative shall apply for recertification following a replacement, modification or change according to the procedures in subdivision (b) of this section. The owner or operator of an alternative monitoring system shall comply with the notification and application requirements for certification according to the procedures specified in paragraph (b)(3) of this section and 40 CFR 75.20(f).

§204-8.3 Out of control periods

(a) Whenever any monitoring system fails to meet the quality assurance requirements of appendix B of 40 CFR part 75, data shall be substituted using the applicable procedures in subpart D, appendix D, or appendix E of 40 CFR part 75.

(b) Audit decertification. Whenever both an audit of a monitoring system and a review of the initial certification or recertification application reveal that any system or component should not have been certified or recertified because it did not meet a particular performance specification or other requirement under section 204-8.2 of this Subpart or the applicable provisions of 40 CFR part 75, both at the time of the initial certification or recertification application submission and at the time of the audit, the department will issue a notice of disapproval of the certification status of such system or component. For the purposes of this subdivision, an audit shall be either a field audit or an audit of any information submitted to the department or the administrator. By issuing the notice of disapproval, the department revokes prospectively the certification status of the system or component. The data measured and recorded by the system or component shall not be considered valid quality-assured data from the date of issuance of the notification of the revoked certification status until the date and time that the owner or operator completes subsequently approved initial certification or recertification tests. The owner or operator shall follow the initial certification or recertification procedures in section 204-8.2 of this Subpart for each disapproved system.

§204-8.4 Notifications

The NO_x authorized account representative for a NO_x budget unit shall submit written notice to the department and the EPA Region 2 office in accordance with 40 CFR 75.61, except that if the unit is not subject to an acid rain emissions limitation, the notification is only required to be sent to the department.

§204-8.5 Recordkeeping and reporting

(a) General provisions. (1) The NO_x authorized account representative shall comply with all recordkeeping and reporting requirements in this section and with the requirements of section 204-2.1(e) of this Part.

(2) If the NO_x authorized account representative for a NO_x budget unit subject to an acid rain emission limitation who signed and certified any submission that is made under subpart F or G of 40 CFR part 75 and which includes data and information required under this Subpart or subpart H of 49 CFR part 75 is not the same person as the designated representative or the alternative designated representative for the unit under 40 CFR part 72, the submission must also be signed by the designated representative or the alternative designated representative.

(b) Monitoring plans. (1) The owner or operator of a unit subject to an acid rain emissions limitation shall comply with requirements of 40 CFR 75.62, except that the monitoring plan shall also include all of the information required by subpart H of 40 CFR part 75.

(2) The owner or operator of a unit that is not subject to an acid rain emissions limitation shall comply with requirements of 40 CFR 75.62, except that the monitoring plan is only required to include the information required by subpart H of 40 CFR part 75.

(c) Certification applications. The NO_x authorized account representative shall submit an application to the department within 45 days after completing all initial certification or recertification tests required under section 204-8.2 of this Subpart including the information required under subpart H of 40 CFR part 75.

(d) Quarterly reports. The NO_x authorized account representative shall submit quarterly reports, as follows:

(1) If a unit is subject to an acid rain emission limitation or if the owner or operator of the NO_x budget unit chooses to meet the annual reporting requirements of this Subpart, the NO_x authorized account representative shall submit a quarterly report for each calendar quarter beginning with:

(i) for units commencing operation prior to May 1, 2002 that are not required to certify monitors by May 1, 2000 under section 204-8.1(b)(1) of this Subpart, the earlier of the calender quarter that includes the date of initial provisional certification under section 204-8.2(b)(3)(iii) of this Subpart or, if the certification tests are not completed by May 1, 2002, the partial calender quarter from May 1, 2002 through June 30, 2002. Data shall be recorded and reported from the earlier of the date and hour corresponding to the date and hour of provisional certification or the first hour on May 1, 2002; or

(ii) for a unit that commences operation after May 1, 2002, the calendar quarter in which the unit commences operation. Data shall be reported from the date and hour corresponding to when the unit commenced operation.

(2) If a NO_x budget unit is not subject to an acid rain emission limitation, then the NO_x authorized account representative shall either:

(i) meet all of the requirements of 40 CFR part 75 related to monitoring and reporting NO_x mass emissions during the entire year and meet the reporting deadlines specified in paragraph (1) of this subdivision; or

(ii) submit quarterly reports only for the periods from the earlier of May 1st or the date and hour that the owner or operator successfully completes all of the recertification tests required under 40 CFR 75.74(d)(3) through September 30th of each year in accordance with the provisions of 40 CFR 75.74(b). The NO_x authorized account representative shall submit a quarterly report for each calendar quarter, beginning with:

(a) for units commencing operation prior to May 1, 2002 that are not required to certify monitors by May 1, 2000 under section 204-8.1(b)(1) of this Subpart, the earlier of the calender quarter that includes the date of initial provisional certification under section 204-8.2(b)(3)(iii) of this Subpart, or if the certification tests are not completed by May 1, 2002, the partial calender quarter from May 1, 2002 through June 30, 2002. Data shall be reported from the earlier of the date and hour corresponding to the date and hour of provisional certification or the first hour of May 1, 2002;

(b) for units that commence operation after May 1, 2002 during the control period, the calender quarter in which the unit commences operation. Data shall be reported from the date and hour corresponding to when the unit commenced operation;

(c) for units that commence operation after May 1, 2002 and before May 1st of the year in which the unit commences operation, the earlier of the calender quarter that includes the date of initial provisional certification under section 204-8.2(b)(3)(iii) of this Subpart or, if the certification tests are not completed by May 1st of the year in which the unit commences operation, May 1st of the year in which the unit commences operation. Data shall be reported from the earlier of the date and hour corresponding to the date and hour of provisional certification or the first hour of May 1st of the year after the unit commences operation; or

(d) for units that commence operation after May 1, 2002 and after September 30 of the year in which the unit commences operation, the earlier of the calender quarter that includes the date of initial provisional certification under section 204-8.2(b)(3)(iii) of this Subpart or, if the certification tests are not completed by May 1st of the year after the unit commences operation, May 1st of the year after the unit commences operation. Data shall be reported from the earlier of the date and hour corresponding to the date and hour of provisional certification or the first hour of May 1st of the year after the unit commences operation.

(3) The NO_x authorized account representative shall submit each quarterly report to the department and the administrator within 30 days following the end of the calendar quarter covered by the report. Quarterly reports shall be submitted in the manner specified in subpart H of 40 CFR part 75 and 40 CFR 75.64.

(i) For units subject to an Acid Rain Emissions limitation, quarterly reports shall include all of the data and information required in subpart H of 40 CFR part 75 for each NO_x budget unit (or group of units using a common stack) as well as information required in subpart G of 40 CFR part 75.

(ii) For units not subject to an acid rain emissions limitation, quarterly reports are only required to include all of the data and information required in subpart H of 40 CFR part 75 for each NO_x budget unit (or group of units using a common stack).

(4) Compliance certification. The NO_x authorized account representative shall submit to the department and the administrator a compliance certification in support of each quarterly report based on reasonable inquiry of those persons with primary responsibility for ensuring that all of the unit's emissions are correctly and fully monitored. The certification shall state that:

(i) the monitoring data submitted were recorded in accordance with the applicable requirements of this Subpart and 40 CFR part 75, including the quality assurance procedures and specifications;

(ii) for a unit with add-on NO_x emission controls and for all hours where data are substituted in accordance with 40 CFR 75.34(a)(1), the add-on emission controls were operating within the range of parameters listed in the monitoring plan and the substitute values do not systematically underestimate NO_x emissions; and

(iii) for a unit that is reporting on a control period basis under this subdivision the NO_x emission rate and NO_x concentration values substituted for missing data under subpart D of 40 CFR part 75 are calculated using only values from a control period and do not systematically underestimate NO_x emissions.

§204-8.6 Petitions for alternatives

(a) The NO_x authorized account representative of a NO_x budget unit that is subject to an acid rain emissions limitation may submit a petition under 40 CFR 75.66 to the administrator requesting approval to apply an alternative to any requirement of this Subpart.

(1) Application of an alternative to any requirement of this Subpart is in accordance with this Subpart only to the extent that the petition is approved by the administrator, in consultation with the department.

(2) Notwithstanding paragraph (1) of this subdivision, if the petition requests approval to apply an alternative to a requirement concerning any additional CEMS required under the common stack provisions of 40 CFR 75.72, the petition is governed by subdivision (b) of this section.

(b) The NO_x authorized account representative of a NO_x budget unit that is not subject to an acid rain emissions limitation may submit a petition under 40 CFR 75.66 to the department and the administrator requesting approval to apply an alternative to any requirement of this Subpart.

(1) The NO_x authorized account representative of a NO_x budget unit that is subject to an acid rain emissions limitation may submit a petition under 40 CFR 75.66 to the department and the administrator requesting approval to apply an alternative to a requirement concerning any additional CEMS required under the common stack provisions of 40 CFR 75.72 or a NO_x concentration CEMS used under 40 CFR 75.71(a)(2).

(2) Application of an alternative to any requirement of this Subpart is in accordance with this Subpart only to the extent the petition under this subdivision is approved by both the department and the administrator.

§204-8.7 Additional requirements to provide heat input data for allocations purposes

The owner or operator of a unit that elects to monitor and report NO_x mass emissions using a NO_x concentration system and a flow system shall also monitor and report heat input at the unit level using the procedures set forth in 40 CFR part 75.