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You are here: Home / Permitting / Air Permits / PermitByRule / Historical Rules / old117 / 698 / Outdated Title 30 TAC 117.510 - 570 Subchapter D, June 10, 1998

Outdated Title 30 TAC 117.510 - 570 Subchapter D, June 10, 1998

Outdated 30 TAC 117 and 31 TAC 117 rules, 31 TAC 117 date from 1972 and the rule changed to 30 TAC 117 in September 1993

Subchapter D Administrative Provisions

117.510 Compliance Schedule For Utility Electric Generation
117.520 Compliance Schedule For Commercial, Institutional, and Industrial Combustion Sources
117.530 Compliance Schedule For Nitric Acid and Adipic Acid Manufacturing Sources
117.540 Phased Reasonably Available Control Technology (RACT)
117.560 Rescission
117.570 Trading

117.510 Compliance Schedule For Utility Electric Generation

All persons affected by the provisions of § § 117.101, 117.103, 117.105, 117.107, 117.109, 117.111, 117.113, 117.115, 117.117, 117.119, and 117.121 of this title (relating to Utility Electric Generation) shall be in compliance as soon as practicable, but no later than November 15, 1999 (final compliance date). Additionally, all affected persons shall meet the following compliance schedules and submit written notification to the executive director:

(1) no later than April 1, 1994, submit a plan for compliance in accordance with § 117.109 of this title (relating to Initial Control Plan Procedures);

(2) conduct applicable continuous emissions monitoring system (CEMS) or predictive emissions monitoring systems (PEMS) evaluations and quality assurance procedures as specified in § 117.113 of this title (relating to Continuous Demonstration of Compliance) according to the following schedules:

(A) for equipment and software required pursuant to 40 Code of Federal Regulations (CFR) 75, no later than January 1, 1995 for units firing coal, and no later than July 1, 1995 for units firing natural gas or oil; and

(B) for equipment and software not required under 40 Code of Federal Regulations (CFR) 75, no later than November 15, 1999;

(3) install all nitrogen oxides (NOx) abatement equipment and implement all NOx control techniques no later than November 15, 1999;

(4) for units operating without CEMS or PEMS, conduct applicable tests for initial demonstration of compliance as specified in § 117.111 of this title (relating to Initial Demonstration of Compliance); and submit the results by April 1, 1994, or as early as practicable, but in no case later than November 15, 1999;

(5) for units operating with CEMS or PEMS and complying with the NOx emission limit on a rolling 30-day average, conduct the applicable tests for the initial demonstration of compliance as specified in § 117.111 of this title and submit the results of the applicable CEMS or PEMS performance evaluation and quality assurance procedures as specified in § 117.113 of this title no later than January 15, 2000;

(6) for units operating with CEMS or PEMS and complying with the NOx emission limit in pounds per hour on a block one-hour average, conduct the applicable tests for the initial demonstration of compliance as specified in § 117.111 of this title and submit the results of the applicable CEMS or PEMS performance evaluation and quality assurance procedures as specified in § 117.113 of this title by November 15, 1999;

(7) conduct applicable tests for initial demonstration of compliance with the NOx emission limit for fuel oil firing, in accordance with § 117.111(d)(2) of this title, and submit test results within 60 days after completion of such testing; and

(8) no later than November 15, 1999, submit a final control plan for compliance in accordance with § 117.115 of this title (relating to Final Control Plan Procedures).

117.520 Compliance Schedule For Commercial, Institutional, and Industrial Combustion Sources

All persons affected by the provisions of § § 117.201, 117.203, 117.205, 117.207-117.209, 117.211, 117.213, 117.215, 117.217, 117.219, 117.221, and 117.223 of this title (relating to Commercial, Institutional, and Industrial Sources) shall be in compliance as soon as practicable, but no later than November 15, 1999 (final compliance date). All affected persons shall meet the following compliance schedules and submit written notification to the executive director:

(1) submit a plan for compliance in accordance with § 117.209 of this title (relating to Initial Control Plan Procedures) according to the following schedule:

(A) for major sources of nitrogen oxides (NOx) which have units subject to emission specifications under this chapter, submit an initial control plan for all such units no later than April 1, 1994;

(B) for major sources of NOx which have no units subject to emission specifications under this chapter, submit an initial control plan for all such units no later than September 1, 1994; and

(C) for major sources of NOx subject to either subparagraphs (A) or (B) of this paragraph, submit the information required by § 117.209(c)(6), (7), and (9) of this title no later than September 1, 1994;

(2) install all NOx abatement equipment and implement all NOx control techniques no later than November 15, 1999;

(3) for units operating without continuous emissions monitoring system (CEMS) or predictive emissions monitoring systems (PEMS), conduct applicable tests for initial demonstration of compliance as specified in § 117.211 of this title (relating to Initial Demonstration of Compliance); and submit the results by April 1, 1994, or as early as practicable, but in no case later than November 15, 1999;

(4) for units operating with CEMS or PEMS and complying with the NOx emission limit on a rolling 30-day average, conduct the applicable tests for the initial demonstration of compliance as specified in § 117.211 of this title and submit the results of the applicable CEMS or PEMS performance evaluation and quality assurance procedures as specified in § 117.213 of this title (relating to Continuous Demonstration of Compliance) no later than January 15, 2000;

(5) for units operating with CEMS or PEMS and complying with the NOx emission limit in pounds per hour on a block one-hour average, conduct the applicable tests for the initial demonstration of compliance as specified in § 117.211 of this title and submit the results of the applicable CEMS or PEMS performance evaluation and quality assurance procedures as specified in § 117.213 of this title by November 15, 1999; and

(6) no later than November 15, 1999, submit a final control plan for compliance in accordance with § 117.215 of this title (relating to Final Control Plan Procedures).

117.530 Compliance Schedule For Nitric Acid and Adipic Acid Manufacturing Sources

All persons affected by the provisions of § § 117.301, 117.305, 117.309, 117.311, 117.319, and 117.321 of this title (relating to Adipic Acid Manufacturing) or the provisions of § § 117.401, 117.405, 117.409, 117.411, 117.413, 117.419, and 117.421 of this title (relating to Nitric Acid Manufacturing - Ozone Nonattainment Areas) shall be in compliance as soon as practicable, but no later than November 15, 1999 (final compliance date). All affected persons shall meet the following compliance schedules and submit written notification to the executive director:

(1) no later than April 1, 1994, submit a control plan for compliance as specified in § 117.309 of this title (relating to Control Plan Procedures) and § 117.409 of this title (relating to Control Plan Procedures);

(2) conduct applicable continuous emissions monitoring system (CEMS) or predictive emissions monitoring systems (PEMS) performance evaluation and quality assurance procedures as specified in § 117.313 of this title (relating to Continuous Demonstration of Compliance) and § 117.413 of this title (relating to Continuous Demonstration of Compliance); provide previous testing documentation for any claimed test waiver as allowed by § 117.311(d) of this title (relating to Initial Demonstration of Compliance) or § 117.411(d) of this title (relating to Initial Demonstration of Compliance); and conduct applicable initial demonstration of compliance testing as specified in § 117.311 and § 117.411 of this title, by:

(A) no later than January 1, 1994, for affected facilities not performing process modification or installation of a CEMS or PEMS device as part of the control plan specified in § 117.309 and § 117.409 of this title; and

(B) no later than November 15, 1999, for affected facilities performing process modification or installation of a CEMS or PEMS device as part of the control plan specified in § 117.309 and § 117.409 of this title;

(3) within 60 days after the applicable date specified in paragraph (2)(A) or (B) of this section, submit the results of CEMS or PEMS performance evaluation and quality assurance procedures and the results of initial demonstration of compliance testing specified in paragraph (2) of this section.

117.540 Phased Reasonably Available Control Technology (RACT)

The owner or operator affected by the provisions of this chapter (relating to Control of Air Pollution from Nitrogen Compounds) who determines that compliance by November 15, 1999, is not practicable may submit a petition for phased RACT. The process for submitting a petition and receiving approval shall be based on the following.

(1) The petition shall be submitted by March 15, 1999, or as soon as possible after such date upon a demonstration by the owner or operator that the petition was not submitted by March 15, 1999 due to unforeseen circumstances.

(2) The owner or operator of the affected unit or units shall submit information in the petition to the commission and a copy to the EPA regional office in Dallas which will demonstrate all of the following:

(A) emission reduction credits (ERCs) or discrete emission reduction credits (DERCs), in accordance with § 101.29 of this title (relating to Emission Credit Banking and Trading), are not reasonably available in an amount equal to the quantity of emission reductions required under this chapter. If ERCs or DERCs are reasonably available, they shall be applied to meet the emission reductions required under this chapter, in accordance with § 117.570 of this title (relating to Trading) and § 101.29 of this title.

(B) compliance by November 15, 1999, is impracticable due to the unavailability of nitrogen oxides (NOx) abatement equipment, engineering services, or construction labor; system unreliability; manufacturing unreliability; equipment unreliability; or other technological and economic factors as the commission determines are appropriate;

(C) there is a proposed stage-by-stage program for compliance and clearly specified compliance milestones for each unit;

(D) there is a commitment to implement the portion of the phased RACT petition that can be implemented by November 15, 1999; and

(E) the final compliance date specified in the petition shall be as soon as practicable, but in no case later than February 15, 2001, except as approved by the executive director.

(3) Each petition for phased RACT shall contain the information required by at least one of the following criteria.

(A) If compliance by November 15, 1999, is impracticable due to the unavailability of NOx abatement equipment, engineering services, or construction labor, the following information shall be included in the petition for phased RACT:

(i) a list of the company names, addresses, and telephone numbers of vendors who are qualified to provide the services and equipment capable of meeting the applicable emission limitation under this chapter and who have been contacted to obtain the required services and equipment. A copy of the request for bids along with the dates of contact shall also be provided to show a good-faith effort to obtain the required services and equipment necessary to meet the requirements of this chapter by November 15, 1999; and

(ii) copies of responses from each of the vendors listed in clause (I) of this subparagraph showing that they cannot provide the necessary services and install the appropriate equipment in time for the unit to comply by November 15, 1999. Such responses shall include the reasons why the services cannot be provided and why the equipment cannot be installed in a timely manner.

(iii) if work on the project will be provided by the owner or operator, the petition for phased RACT shall include documentation that the necessary NOx abatement equipment, engineering services, or construction labor could not be obtained in a timely manner from either in-house or external sources, as well as a detailed design or installation schedule for the required services or equipment to be provided by the owner or operator.

(B) If compliance by November 15, 1999, is impracticable due to system unreliability for sources in the utility industry, defined as the inability or threatened inability of a utility grid system to fulfill obligations to supply electric power, the following information shall be included in the petition for phased RACT:

(i) standard load forecasts, based on standard forecasting models available throughout the utility industry, applied to the period November 15, 1997 - November 14, 1999;

(ii) outage schedule for all units in the utility grid to which the subject unit belongs; and

(iii) specific reasons why an outage for the purpose of installing NOx emission control equipment cannot be scheduled by November 15, 1999.

(C) If compliance by November 15, 1999, is impracticable due to manufacturing unreliability, defined as the inability or threatened inability of a source to fulfill contractual obligations to supply a product or products, the following information shall be included in the petition for phased RACT:

(i) certification by an authorized official of the company showing manufacturing obligations for which the company is contractually obligated. Manufacturing obligation information shall include copies of contracts signed by an authorized official of the company or similar documentation and shall exclude commercially sensitive information;

(ii) historical and planned outage schedules for all units whose manufacturing capacity would be affected by the outage of the affected unit; and

(iii) specific reasons why an outage for the purpose of installing NOx emission control equipment cannot be scheduled by November 15, 1999.

(D) If compliance by November 15, 1999, is impracticable due to equipment unreliability, defined as the reduced availability and operating reliability of a unit resulting from the operation of NOx control equipment on that unit, the following information shall be included in the petition for phased RACT:

(i) specific reasons why the new NOx control equipment will reduce the current reliability of the operating unit;

(ii) historical availability and forced outage data expressed as annual percentages and the differences in each expected with the new NOx control equipment. Availability is defined as the sum of hours the equipment is in service plus the hours the equipment is not in service, but available for service, divided by the number of hours in the reporting period. A forced outage is defined as down time which occurs as a result of a trip, emergency shutdown, or unplanned maintenance;

(iii) most recent operating history available from the vendor for the new NOx control equipment, including actual test operating hours, actual load during testing, and specific problems that resulted in lost availability; and

(iv) reasons why the NOx control technology is not considered proven including vendor test and commercial operating data, if available from the vendor.

(E) If compliance by November 15, 1999, is impracticable due to other technical factors, the petition for phased RACT shall contain such documentation as the executive director establishes is appropriate for such technical factors.

(F) If compliance by November 15, 1999, is unreasonable due to economic considerations, excluding the time value of money, the petition for phased RACT shall contain the following information showing comparisons of the cost of compliance by November 15, 1999 and the cost of compliance by the final compliance date specified in the petition:

(i) the costs of additional outages, if applicable, necessitated by compliance with the emission specifications of this chapter by November 15, 1999, as demonstrated by comparison to costs of actual historical and planned outages;

(ii) comparisons of the cost of obtaining the NOx abatement equipment, engineering services, or construction labor necessary to comply by November 15, 1999, and the cost of obtaining the NOx abatement equipment, engineering services, or construction labor by the final compliance date specified in the petition. Copies of legally binding contracts, signed by an authorized official of the company, shall be submitted to document these costs. If the required NOx abatement equipment, engineering services, or construction labor will be provided by the owner or operator, as provided for in paragraph (4) of this subsection, certification by an authorized official of the company may be submitted in lieu of contracts to document these costs; or

(iii) other economic factors, documented as the executive director establishes is appropriate for such economic factors.

(4) All petitions for phased RACT shall include a list of the company names, addresses, and telephone numbers of persons who own or control ERCs or DERCs, and who have been contacted in efforts to obtain the ERCs or DERCs for purposes of meeting the emission reductions required under this chapter. For each person or company contacted, the list shall contain a description of the information obtained, including but not limited to the date of contact, availability of the ERCs or DERCs, sale price requested by the owner or controller of the ERCs or DERCs, sale price offered by the prospective buyer of the ERCs or DERCs, and an explanation of the reasons why the ERCs or DERCs, if available, were not purchased for purposes of meeting the emission reductions required under this chapter.

(5) All petitions for phased RACT shall include copies of legally binding contracts with the primary vendors for each project, signed by an authorized official of the company, showing a detailed design or installation schedule for the required services or equipment to be provided by that vendor, with a completion date no later than February 15, 2001, except as approved by the executive director. Any commercially sensitive financial information or trade secrets should be excised from the contracts.

(6) Within 30 days of receiving a petition for phased RACT, the executive director shall inform the applicant in writing that the petition is complete or that additional information is required. If the petition is deficient, the notification shall state any additional information required. The requested information correcting the deficiency shall be received by the executive director within 30 days of the date of the letter notifying the applicant of the deficiency.

(7) The executive director shall approve or deny the petition within 90 days of receiving an administratively complete phased RACT petition. The executive director shall approve a petition for phased RACT if the executive director determines that compliance is not practicable by November 15, 1999, because of either the unavailability of nitrogen oxides abatement equipment, engineering services, or construction labor; system unreliability; manufacturing unreliability; equipment unreliability; or other technological and economic factors as the executive director determines are appropriate.

(8) Any person affected by the executive director's decision to deny a petition for phased RACT or to deny a revision to an approved phased RACT petition may file a motion for reconsideration. Notwithstanding the applicability provisions of § 50.31(c)(7) of this title (relating to Purpose and Applicability), the requirements of § 50.39 of this title (relating to Motion for Reconsideration) apply. However, only a person affected may file a motion for reconsideration. Approved petitions for phased RACT may be revised by the executive director upon a showing of just cause by the applicant.

(9) Approval of a phased RACT schedule by the commission does not waive any applicable federal requirements or eliminate the need for approval by EPA.

(10) The holder of an approved phased RACT determination shall comply with each specified compliance milestone and each date for compliance provided in the approved petition, as well as any other condition established in the approval.

117.560 Rescission

If, after reviewing the results of the Urban Airshed Model for a nonattainment area, the Texas Natural Resource Conservation Commission (TNRCC) determines after conducting public hearings that the additional reductions of nitrogen oxides (NOx) in the nonattainment area would not contribute to attainment of the National Ambient Air Quality Standards for ozone in that nonattainment area, then the TNRCC shall have the executive director submit such findings and results to the United States Environmental Protection Agency (EPA) Administrator for a determination under the 1990 Federal Clean Air Act Amendments § 182(f). If the EPA Administrator approves the TNRCC's finding, then the requirements of this chapter shall be reproposed in rulemaking to address the findings of the Administrator as to the applicable NOx requirements.

117.570 Trading

(a) An owner or operator may reduce the amount of emission reductions required by § 117.105 or § 117.205 of this title (relating to Emission Specifications), § 117.107 of this title (relating to Alternative System-Wide Emission Specifications), § 117.207 of this title (relating to Alternative Plant-Wide Emission Specifications), or § 117.223 of this title (relating to Source Cap) by obtaining an emission reduction credit (ERC), mobile emission reduction credit (MERC), discrete emission reduction credit (DERC), or mobile discrete emission reduction credit (MDERC) established in accordance with this section and § 101.29 of this title (relating to Emission Credit Banking and Trading). Any ERCs or DERCs for nitrogen oxides (NOx) generated under the provisions of § 101.29 of this title used for the purposes of this chapter become subject to the limitations and provisions of this section. For the purposes of this section, the term "RC" refers to an ERC, MERC, DERC, or MDERC whichever is applicable.

(b) Reduction credits (RCs) shall be generated as follows.

(1) For sources not subject to the emission specifications of § 117.105 or § 117.205 of this title, creditable RCs used to meet compliance with those sections shall be established in accordance with the following requirements:

(A) The source shall use emissions test data to establish the actual emissions baseline in accordance with the testing requirements of § 117.209(b) of this title (relating to Initial Control Plan Procedures), or § 117.111 or § 117.211 of this title (relating to Initial Demonstration of Compliance), as applicable. The actual emissions baseline is defined as the actual annual emissions, in tons per year, from a source determined by use of data representative of actual operations in 1990 or later, assuming full compliance with all applicable state and federal rules and regulations.

(B) If the source creating the RC has been shut down or irreversibly changed, the source shall use the best available data and good engineering practice to establish the actual emissions baseline.

(2) For sources subject to the emission specifications of § 117.105 or § 117.205 of this title, creditable RCs shall be calculated using the following equations:

ERCs (tons per year) = (Summation of j=1 to N (Hj x (Raj - Rbj) x (365/2000))

or

DERCs (tons) = (Summation of j=1 to N (Hj x (Raj - Rbj) x (d/2000))

Where:

j = each emission unit subject to this section generating RCs

N = the total number of emission units subject to this section generating RCs

Hj = actual daily heat input, in million British thermal units (MMBtu) per day, as calculated according to § 117.223(b)(1) of this title

RAj = the lowest of any applicable federally enforceable emission limitation, the reasonably available control technology (RACT) limit of § 117.105 or § 117.205(b)-(d) of this title, or the actual emission rate as of June 9, 1993, in pound (lb)/MMBtu, that apply to emission unit j in the absence of trading. For units that have been shut down prior to June 9, 1993, the actual emission rate shall be considered to be the average annual emission rate occurring over the period used to define the unit's baseline heat input period in § 117.223(g)(3) of this title.

RBj = the enforceable emission rate, in lb/MMBtu, for unit j established in the registration under subsection (e) of this section.

d = the number of days in the generation period

(3) RCs from shutdown units may be generated only by units participating in a source cap in accordance with § 117.223 of this title.

(4) For units participating in a source cap in accordance with § 117.223 of this title, creditable RCs may be generated only under the following conditions:

(A) The source cap allowable must be reduced by the amount of the creditable reductions claimed for the unit or units, and

(B) the actual historical average of the daily heat input for the unit or units may not include one standard deviation of the actual average daily heat input for the period for which creditable reductions are claimed.

(c) Reduction credits shall be used as follows.

(1) An owner or operator complying with § 117.223 of this title may reduce the amount of emission reductions otherwise required by complying with the following equations instead of the equations in § 117.223(b)(1) and (2) of this title.

ERCs or MERCs: New 30-day rolling average emission limit (lb/day) =

Summation of i=1 to N ((Hi x Ri) + (Rci x (2000/365)))

or

DERC or MDERCs: New 30-day rolling average emission limit (lb/day) =

Summation of i=1 to N ((Hi x Ri) + ((Rci x 2000)/d))

Where:

Ri, in lb/MMBtu, is defined as in § 117.223(b)(1) of this title

I = each emission unit in the source cap

N = the total number of emission units in the source cap

Hi = actual daily heat input, in MMBtu per day, as calculated according to § 117.223(b)(1) of this title

RCi = RC used for each unit, in tons per year (for ERCs or MERCs) or tons (for DERCs), generated in accordance with subsection (b) of this section. If RCi is from a unit not subject to the emission specifications of § 117.105 or § 117.205 of this title, this term becomes Rci/F, where F is the offset ratio for the ozone nonattainment area where the unit is located (e.g. 1.2 for Beaumont/Port Arthur and 1.3 for Houston/Galveston).

d = the number of days in the use period

and ERCs or MERCs: New maximum daily emission limit (lb/day) =

Summation of i=1 to N ((Hmi x Ri) + (Rci x (2000/365)))

or DERCs or MDERCs: New maximum daily emission limit (lb/day) =

Summation of i=1 to N ((Hmi x Ri) + ((Rci x 2000)/d))

Where:

I and N are defined as in the first equation in this paragraph

Ri, in lb/MMBtu, is defined as in § 117.223(b)(1) of this title

HMi = the maximum daily heat input, in MMBtu/day, as defined in § 117.223(b)(2) of this title.

d = the number of days in the use period

(2) An owner or operator complying with § 117.105, § 117.107, § 117.205, or § 117.207 of this title may reduce the amount of emission reduction otherwise required by those sections for a unit or units at a major source by complying with individual unit emission limits calculated from the following equation:

ERCs or MERCs: New emission limit for unit i (lb/MMBtu) = Rai + ((RCi/Hmi) x (2000/365))

or

DERCs or MDERCs: New emission limit for unit i (lb/MMbtu) = Rai + ((RCi/Hmi) x (2000/d))

Where:

I = each emission unit subject to this section

N = the total number of emission units subject to this section

RAi = the lowest of any applicable federally enforceable emission limitation, the RACT limit of § 117.105 or § 117.205(b)-(d) of this title, or the actual emission rate as of June 9, 1993, in lb/MMBtu, that apply to emission unit I in the absence of trading. For units that have been shut down prior to June 9, 1993, the actual emission rate shall be considered to be the average annual emission rate occurring over the period used to define the unit's baseline heat input period in § 117.223(g)(3) of this title.

d = the number of days in the use period

and

HMi and RCi are defined as in paragraph (1) of this subsection.

The appropriate compliance averaging period specified in § 117.105, § 117.107, § 117.205, or § 117.207 of this title shall be assigned to unit i using a RC in accordance with the provisions of this paragraph.

(3) RCs from shutdown units may be used only by units participating in a source cap in accordance with § 117.223 of this title.

(d) Any lower NOx emission specification established by rule or permit for the unit or units generating an ERC shall require the user of the ERC to obtain an approved new reduction credit or otherwise reduce emissions prior to the effective date of such rule or permit change. For units using an ERC in accordance with this section which are subject to new, more stringent rule or permit limitations, the owner or operator using the ERC shall submit a revised final control plan to the executive director in accordance with § 117.117 or § 117.217 of this title (relating to Revision of Final Control Plan) to revise the basis for compliance with the emission specifications of this chapter. The owner or operator using the ERC shall submit the revised final control plan as soon as practicable, but no later than 90 days prior to the effective date of the new, more stringent rule or permit limitations. In addition, the owner or operator of a unit generating the ERC shall submit a revised registration application to the executive director, in accordance with subsection (e)(1) of this section, within 90 days prior to the effective date of any new, more stringent rule or permit limitations affecting that unit. If a more stringent NOx emission specification is established by rule or permit for the unit or units generating the ERC, the value of the ERC shall be recalculated as follows:

ERCs: Recalculated ERC (tons per year) = Summation of j = 1 to N (Hj x (Rbj - R(aj-new)) x (365/2000))

Where:

j, N, Hj and RBj are defined as in subsection (b)(2) of this section

Raj new = the new NOx emission specification for unit j, in lb/MMBtu

If the recalculated ERC is of zero or negative value, the ERC is determined to be of zero value.

(e) The RC program established by this section shall be administered as follows:

(1) For emission units subject to the emission specifications of this chapter, which generate ERCs, MERCs, DERCs, or MDERCs and for which the owner or operator elects to comply with the individual emission specifications of § § 117.105, 117.107, 117.205, or 117.207 of this title, the enforceable emission limit RBj shall be calculated using the maximum rated capacity.

(2) For emission units subject to the emission specifications of this chapter, which generate ERCs, MERCs, DERCs, or MDERCs, and for which the owner or operator elects to achieve compliance using § 117.223 of this title, the enforceable emission limit RBj shall be substituted for Rj in the source cap allowable mass emission rate equations of § 117.223(b)(1) and (2) of this title, and those allowable rates shall be the enforceable limits for those sources.


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