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Approval and Promulgation of Implementation Plans; Texas; Post 96 Rate of Progress Plan, Motor Vehicle Emissions Budgets (MVEB) and Contingency Measures for the Houston/Galveston (HGA) Ozone Nonattainment Area

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Environmental Protection Agency (EPA).


Direct final rule.


The EPA is taking direct final action on portions of the Texas Ozone State Implementation Plan (SIP) revision submitted by the Governor of Texas on May 19, 1998, to meet the reasonable further progress requirements of the Federal Clean Air Act (the Act). We are approving the Post-1996 Rate-of-Progress (ROP) Plan, the Motor Vehicle Emissions Budgets (MVEB) established by the ROP Plan, revisions to the contingency measures, and revisions to the 1990 base year emissions inventory for the Houston/Galveston (HGA) 1-hour ozone nonattainment area.


This direct final rule is effective June 25, 2001 unless adverse or critical comments are received by May 25, 2001. If adverse comments are received, EPA will publish timely withdrawal of the rule in the Federal Register.


Written comments on this action should be addressed to Mr. Thomas Diggs, Chief, Air Planning Section (6PD-L), at the EPA Region 6 Office listed below.

Copies of the documents, including the Technical Support Document, relevant to this action are available for public inspection during normal business hours at the following locations. Interested persons wanting to examine these documents should make an appointment with the appropriate office at least two working days in advance.

Environmental Protection Agency, Region 6, Air Planning Section (6PD-L), Multimedia Planning and Permitting Division, Dallas, 1445 Ross Avenue, Texas 75202-2733, telephone: (214) 665-7214.

Texas Natural Resource Conservation Commission, Office of Air Quality, 12124 Park 35 Circle, Austin, Texas 78753.

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Mr. Guy R. Donaldson, Air Planning Section (6PD-L), Multimedia Planning and Start Printed Page 20747Permitting Division, Environmental Protection Agency, Region 6, 1445 Ross Avenue, Dallas, Texas 75202-2733, telephone: (214) 665-7242.

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Throughout this document “we,” “us,” and “our” refers to EPA.

I. What Action Are We Taking?

We are approving portions of the revision to the Texas Ozone State Implementation Plan for the HGA ozone nonattainment area received May 19, 1998, to meet the Reasonable Further Progress requirements of the Act. We are approving the Post 96 Rate of Progress (OP) plan that is designed to reduce ozone forming emissions by November 15, 1999 from the baseline emissions by an additional 9% in the HGA nonattainment area. In addition, we are approving the MVEBs associated with the 9% ROP Plan. We are also approving the revisions to the contingency plan, and the 1990 base year emissions inventory for the HGA area, which were included with the May 19, 1998, SIP revision. In this action, we are not acting on other portions of the May 19, 1998, SIP revision regarding the attainment demonstration. In a separate action, we proposed conditional approval, and alternatively, disapproval of the portions of the May 19, 1998, SIP revision that pertained to the attainment demonstration (64 FR 70548, December 16, 1999).

II. Why Is Texas Required To Develop a Post 96 Rate of Progress Plan for Houston?

Section 182(c)(2) of the CAA requires each serious and above ozone nonattainment area to submit a SIP revision by November 15, 1994, which describes, in part, how the area will achieve an actual volatile organic compound (VOC) emission reduction from the baseline emissions of at least 3 percent of baseline emissions per year averaged over each consecutive 3-year period beginning 6 years after enactment (i.e., November 15, 1996) until the area's attainment date. Section 182(c)(2)(C) explains the conditions under which reductions of oxides of nitrogen (NOX) may be substituted for reductions in VOC emissions. The HGA ozone nonattainment area is classified as severe-17, with an attainment date of 2007.

Texas submitted a plan to achieve the 9% reductions in a letter dated November 9, 1994. This plan was revised in a letter dated August 9, 1996. On March 9, 1998, we proposed to disapprove the 1994 Post '96 ROP plan, as revised in 1996, primarily because the plan projected too much emission reductions from the Compliance Assurance Monitoring program. The May 19, 1998, SIP revision addresses the concerns expressed in our proposed disapproval.

III. When Will Texas Submit Plans for the Remaining Required Rate of Progress Reductions?

Section 182(c)(2) requires that States provide a plan that includes emission reductions of at least 3% of baseline emissions per year from November 15, 1996, until the attainment date. It was anticipated that these emission reductions would be consistent with the attainment demonstration modeling that was due November 15, 1994. We, however, have acknowledged the difficulty States were having in meeting the November 15, 1994 deadline to develop attainment demonstrations. In a March 2, 1995 policy memorandum, we provided that States could submit their attainment demonstration and Rate-of-Progress plans in phases. Phase I was to insure that progress was maintained while a complete plan was developed. The Phase I plan was to include a set of specific control measures to obtain major reductions in ozone precursors. For Texas, these were to include:

  • Rules to insure that Reasonably Available Control Technology (RACT) was implemented on major sources of volatile organic compounds,
  • A demonstration that 3% of baseline emissions per year reduction in emissions would occur during the time period 1997-1999 (Post 96 Rate of Progress),
  • An enforceable commitment to submit an attainment demonstration by mid-1997, and
  • A commitment to participate in a consultative process to address Regional transport of ozone and precursors.

A December 29, 1997, guidance memorandum provided for submittal of an attainment demonstration from mid-1997 until April, 1998. The December 29, 1997, memorandum explained that additional time was warranted because the consultative process to address transport, which had become know as the ozone transport assessment group (OTAG), had been delayed by 9 months so it was appropriate to delay the submittal of the attainment demonstrations.

The December 29, 1997, memorandum indicated EPA's view that by April, 1998, States should submit the following:

  • An attainment demonstration for the one-hour ozone standard, modeling analysis and supporting documentation.
  • Evidence that all measures and regulations required for the nonattainment area by subpart 2 of title I of the Act to control ozone and its precursors have been adopted and implemented or are on an expeditious schedule to be adopted and implemented.
  • A list of measures and regulations and/or a strategy including technology forcing controls needed to meet ROP requirements and attain the 1-hour NAAQS.
  • For severe and higher classified nonattainment areas, a SIP commitment to submit a plan on or before the end of 2000 which contains (a) target calculations for post-1999 ROP milestones up to the attainment date (unless already submitted to satisfy EPA's previous findings of failure to submit) and (b) adopted regulations needed to achieve the post-1999 ROP requirements up to the attainment date and to attain the 1-hour NAAQS.
  • A SIP commitment and schedule to implement the control programs and regulations in a timely manner to meet ROP and achieve attainment.
  • Evidence of a public hearing on the State submittal.

The May 19, 1998 SIP revision contains a commitment to submit a plan by December 15, 2000, which contains target calculations for Post-1999 ROP milestones up to the attainment date and adopted regulations to achieve the Post-99 ROP requirements up to the attainment date and to attain the 1-hour National Ambient Air Quality Standard (NAAQS). In a letter from the Governor dated December 20, 2000, Texas submitted a plan to achieve the Post 99 Rate of Progress requirements. EPA will be evaluating the December 20, 2000, SIP revision in a separate action.

IV. Why Control Volatile Organic Compounds (VOC) and NOX?

VOCs participate in a chemical reaction with Oxides of Nitrogen (NOX) and oxygen in the atmosphere to form ozone, a key component of urban smog. Inhaling even low levels of ozone can trigger a variety of health problems including chest pains, coughing, nausea, throat irritation, and congestion. It can worsen bronchitis, asthma and reduce lung capacity.

V. How Much Reduction in Emission Is Needed?

Calculating the needed emission reductions is a multi-step process as described below.

Emissions Inventory

The 1990 Final Base Year Inventory is the starting point for calculating the reductions necessary to meet the requirements of the 1990 Act. The 1990 Start Printed Page 20748Final Base Year Inventory includes all area, point, and mobile sources emissions in the 8 county HGA ozone nonattainment area. The 1990 base year inventory was originally approved November 8, 1994 (59 FR 55586). The State revised the VOC inventory on August 8, 1996. These changes were approved November 10, 1998. As part of the May 19, 1998, SIP revision, Texas again revised the 1990 base year inventory. We are approving these changes to the inventory. The new inventory is summarized in Table 1. The changes to the inventory are described later.

Table 1.—1990 Rate-of-Progress Base Year Inventory

Source typeVOC Tons/dayNOX Tons/day

Adjusted Base Year Inventory

Section 182(b)(2)(C) explains that the baseline from which emission reductions are calculated should be determined as outlined in section 182(b)(1)(B) for 15% ROP plans. This requires that the baseline exclude emission reductions due to Federal Motor Vehicle Control Programs promulgated by the Administrator by January 1, 1990, and emission reductions due to the regulation of Reid Vapor Pressure promulgated by the Administrator prior to the enactment of the Clean Air Act Amendments of 1990. These measures are not creditable to the Rate of Progress Plans.

Estimates of Growth

States need to provide sufficient control measures in their ROP plans to offset any emissions growth. To do this the State must estimate the amount of growth that will occur. The State uses population and economic forecasts to estimate how emissions will change in the future. Generally, Texas followed standard EPA guidelines in estimating the growth in emissions. For the projection of NOX emissions from industrial sources, Texas used data collected during the development of the 1996 periodic emissions inventory. With the 1996 periodic inventory, Texas surveyed industry to determine why emissions were changing, to see if changes were actual changes in emissions to the atmosphere or just changes in the emission estimation methodology. For example, many sources installed continuous emission monitors between 1990 and 1996 and actual measurements replaced engineering estimates. For more detail on how emissions growth was estimated see the Technical Support Document for this action.

Calculation of Target Level

Table 2 shows how the emissions inventory, adjusted inventories and growth estimates are used to calculate the target levels of emissions and needed emission reductions.

Table 2: Calculation of Required Reductions


1990 Emission Inventory1064.851344.33
1990 Adjusted Relative to 1996976.72
1990 Adjusted Relative to 1999964.981269.53
RVP and Fleet Turnover11.7476.39
3% of adjusted VOC, 6% of adjusted NOX28.9576.19
1996 Target level812.77* NA
1999 Target level772.081191.77
1999 Projection1076.761306.21
Total Reductions required by 1999304.68114.44
Reductions required by 15%213.27NA
Additional Reductions Required91.41114.44
* The 1996 Target level comes from the 15% Rate of Progress plan. The 15% plan could only rely on VOC reductions so there is no 1996 target level for NOX.

VI. How Are Those Emission Reductions Achieved?

Tables 3 and 4 document how the VOC and NOX emission reductions for this 9% ROP plan are to be achieved. The following control measures and emission reductions were unchanged from the previous 1994, as revised in 1996, 9% SIP revision: Aircraft Engines, Recreational Marine, Utility Engines, Underground Storage Tank Remediation, Transportation Control Measures, Reformulated Gasoline in Storage Tanks, Reformulated Gasoline in Loading Racks and Rule Effectiveness in Floating Roof Storage Tanks. In our proposed disapproval (63 FR 11387, March 9, 1998), we explained why we could accept the projected emission reductions from the above-listed measures. Please refer to the proposed disapproval Federal Register notice and its Technical Support Document where we explained our basis for acceptance of the projected emission reductions from these measures.

In the May 19, 1998, SIP revision, Texas did change its projected emission reductions from the Pulp and Paper MACT measure. The State had originally based their estimate of emission reductions on the proposed MACT standard. The final MACT rule did not achieve as much emission reduction as anticipated. The difference between the proposed and final MACT standard was 2.2 tons/day. The State, however, has documented 2.2 tons/day estimated emission reductions due to its vent gas control rule and permits containing vent gas controls.

The State also changed its estimates of on-road motor vehicle emissions based on revised Vehicle Miles Traveled estimates. We reviewed the revised estimates and find them acceptable. Refer to the TSD for further discussion.

Finally, Texas is now projecting emission reductions due to the implementation of NOX Reasonably Available Control Technology (RACT) in the Houston/Galveston area. We approved the NOX RACT rules in a separate Federal Register (see 65 FR 53172, September 1, 2000). We have reviewed the projected emission reductions from the NOX RACT rules and find them acceptable. Refer to the TSD for the NOX RACT action for the Start Printed Page 20749discussion of the projected emission reductions from each approved rule for each source category.

Table 3.—Summary of VOC Emission Reductions Houston/Galveston


Required Reduction91.41
Creditable Reductions:
Aircraft Engines0.97
Pulp and Paper MACT2.20
Recreational Marine0.06
Utility Engine 1997-19996.31
UST remediation2.05
Tier I, I/M, RFG18.59
MSW landfills—NSPS4.06
RFG—Loading Racks3.76
RE—Floating Roof Tanks26.86
Excess emissions from the 15% plan23.37

Table 4.—Summary of NOX Emission Reductions Houston/Galveston


Required Reduction101.61
Creditable Reductions:
RFG, I/M, FMVCP Tier I36.49

VII. How Has Texas Addressed EPA's Concerns Identified in Our Proposed Disapproval?

In the March 9, 1998, proposed disapproval, we proposed to disapprove the emission reductions that Texas had projected for three control measures. These were the Federal Compliance Assurance Monitoring Program, Texas Alternative Fuel Fleets and surplus emissions from the 15% plan due to the gas cap check. In the May 19, 1998, submission, Texas has, in effect, replaced these three programs' projected emission reductions with the reductions projected from the NOX RACT rules.

VIII. What Is a Motor Vehicle Emissions Budget (MVEB) and Why Is It Important?

The MVEB is the level of total allowable on-road emissions established by a control strategy implementation plan or maintenance plan. In this case, the MVEB establishes the level of on-road emissions that can be produced in 1999, when considered with emissions from all other sources, that meets the RFP milestones. It is important because the MVEB is used to determine the conformity of transportation plans and programs to the SIP, as described by section 176(c)(2)(A) of the Act.

IX. What Are the MVEB's Established by This Plan and Approved by This Action?

The MVEB's established by this plan and that the EPA is approving are contained in the following table.

Table 5.—Houston 1999 Motor Vehicle Emissions Budget


Motor Vehicle Emissions Budget132.68283.01

X. What Is the Applicable MVEB To Use for Conformity Analysis After 1999?

When evaluating transportation plans, emissions in years after 1999 must be less than the 1999 ROP progress MVEB being approved here. In November 1999, the State submitted the 2007 attainment year MVEBs for VOC and NOX. On May 31, 2000, EPA found these MVEB adequate for conformity purposes. This decision was effective June 29, 2000. The projected emissions in years after 2007 must be less than the appropriate MVEBs.

On December 20, 2000, Texas submitted Rate of Progress MVEBs for 2002, 2005 and 2007. They also submitted revised attainment level MVEBs for 2007 which were initially submitted in November 1999. If EPA finds these MVEBs adequate for conformity purposes, then they will be the applicable budgets that must be used for such later years in future conformity evaluations.

XI. What Are the Contingency Measures for Houston?

Ozone areas classified as moderate or above must include in their submittals under section 172(b) of the CAA, contingency measures to be implemented if RFP is not achieved or if the standard is not attained by the applicable date. The General Preamble to Title I, (57 FR 13498) states that the contingency measures should at a minimum ensure that an appropriate level of emissions reduction progress continues to be made if attainment or RFP is not achieved and additional planning by the State is needed. Therefore, we interpret the Act to require States with moderate and above ozone nonattainment areas to include sufficient contingency measures so that upon implementation of such measures additional emissions reductions of up to 3 percent of the emissions in the adjusted base year inventory (or a lesser percentage that will cure the identified failure) would be achieved in the year following the year in which the failure has been identified. States must show that their contingency measures can be implemented with minimal further action on their part and with no additional rule making actions such as public hearings or legislative review.

Texas has developed contingency measures to be implemented if they fail to achieve the required reductions, that were expected as part of the 9% plan. They have chosen to meet the 3% emission reductions contingency with 2% VOC emission reductions and 1% additional NOX reductions. These contingency measures are summarized in Tables 6 and 7. Consult the Technical Support Document for this action for more information.

Table 6.—Summary of VOC Contingency Measures Houston/Galveston


Required Contingency19.33
Creditable Reductions:
Tier I, RFG, Phase II15.07
Recreation Marine (2000)0.31
Offset Printing2.34
Naptha Dry Cleaning1.97
Utility Engine1.51
Surplus Emission Reductions from the 9% ROP Plan0.41

Table 7.—Summary of NOX Contingency Measures Houston/Galveston


Required Contingency12.70
Creditable Reductions:
Excess Emission Reductions 9% ROP Plan17.05
Tier I, RFG, Phase II7.42

The EPA is publishing this rule without prior proposal because we view this as a noncontroversial amendment and anticipate no adverse comments. However, in the “Proposed Rules” section of today's Federal Register publication, we are publishing a separate document that will serve as the proposal to approve the SIP revision if adverse comments are received. This rule will be effective on June 25, 2001 without further notice unless we receive adverse comment by May 25, 2001. If EPA receives adverse comments, we Start Printed Page 20750will publish a timely withdrawal in the Federal Register informing the public that the rule will not take effect. We will address all public comments in a subsequent final rule based on the proposed rule. We will not institute a second comment period on this action. Any parties interested in commenting must do so at this time.

III. Administrative Requirements.

Under Executive Order 12866 (58 FR 51735, October 4, 1993), this action is not a “significant regulatory action” and therefore is not subject to review by the Office of Management and Budget. This action merely approves state law as meeting federal requirements and imposes no additional requirements beyond those imposed by state law. Accordingly, the Administrator certifies that this rule will not have a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act (5 U.S.C. 601 et seq.). Because this rule approves pre-existing requirements under state law and does not impose any additional enforceable duty beyond that required by state law, it does not contain any unfunded mandate or significantly or uniquely affect small governments, as described in the Unfunded Mandates Reform Act of 1995 (Public Law 104-4). This rule also does not have a substantial direct effect on one or more Indian tribes, on the relationship between the Federal Government and Indian tribes, or on the distribution of power and responsibilities between the Federal Government and Indian tribes, as specified by Executive Order 13175 (65 FR 67249, November 9, 2000), nor will it have substantial direct effects on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government, as specified in Executive Order 13132 (64 FR 43255, August 10, 1999), because it merely approves a state rule implementing a federal standard, and does not alter the relationship or the distribution of power and responsibilities established in the Clean Air Act. This rule also is not subject to Executive Order 13045 (62 FR 19885, April 23, 1997), because it is not economically significant.

In reviewing SIP submissions, EPA's role is to approve state choices, provided that they meet the criteria of the Clean Air Act. In this context, in the absence of a prior existing requirement for the State to use voluntary consensus standards (VCS), EPA has no authority to disapprove a SIP submission for failure to use VCS. It would thus be inconsistent with applicable law for EPA, when it reviews a SIP submission, to use VCS in place of a SIP submission that otherwise satisfies the provisions of the Clean Air Act. Thus, the requirements of section 12(d) of the National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 note) do not apply. As required by section 3 of Executive Order 12988 (61 FR 4729, February 7, 1996), in issuing this rule, EPA has taken the necessary steps to eliminate drafting errors and ambiguity, minimize potential litigation, and provide a clear legal standard for affected conduct. EPA has complied with Executive Order 12630 (53 FR 8859, March 15, 1988) by examining the takings implications of the rule in accordance with the “Attorney General's Supplemental Guidelines for the Evaluation of Risk and Avoidance of Unanticipated Takings” issued under the executive order. This rule does not impose an information collection burden under the provisions of the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.).

The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the Small Business Regulatory Enforcement Fairness Act of 1996, generally provides that before a rule may take effect, the agency promulgating the rule must submit a rule report, which includes a copy of the rule, to each House of the Congress and to the Comptroller General of the United States. EPA will submit a report containing this rule and other required information to the U.S. Senate, the U.S. House of Representatives, and the Comptroller General of the United States prior to publication of the rule in the Federal Register. A major rule cannot take effect until 60 days after it is published in the Federal Register. This action is not a “major rule” as defined by 5 U.S.C. 804(2). This rule will be effective June 25, 2001 unless EPA receives adverse written comments by May 25, 2001.

Under section 307(b)(1) of the Clean Air Act, petitions for judicial review of this action must be filed in the United States Court of Appeals for the appropriate circuit by June 25, 2001. Filing a petition for reconsideration by the Administrator of this final rule does not affect the finality of this rule for the purposes of judicial review nor does it extend the time within which a petition for judicial review may be filed, and shall not postpone the effectiveness of such rule or action. This action may not be challenged later in proceedings to enforce its requirements. (See section 307(b)(2).)

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List of Subjects in 40 CFR Part 52

  • Environmental protection
  • Air pollution control
  • Hydrocarbons
  • Incorporation by reference
  • Intergovernmental relations
  • Nitrogen oxides
  • Ozone
  • Reporting and recordkeeping requirements
  • Volatile organic compounds
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Dated: April 5, 2001.

Jerry Clifford,

Acting Regional Administrator, Region 6.

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Part 52, Chapter I, Title 40 of the Code of Federal Regulations is amended as follows:

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1. The authority citation for part 52 continues to read as follows:

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Authority: 42 U.S.C. 7401 et seq.

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Subpart SS—Texas

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2. In § 52.2270, paragraph (e) in the table entitled “EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Texas SIP” two entries are added to the end of the table to read as follows:

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Identification of plan.
* * * * *

(e) * * *

EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Texas SIP

Name of SIP provisionApplicable geographic or nonattainment areaState submittal date/effective dateEPA approval dateComments
*         *         *         *         *         *         *
Post 96 Rate of Progress PlanHouston, Texas5/19/984/25/01 66 FR 20750Originally submitted 11/9/94 and revised 8/9/96.
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Contingency MeasuresHouston, Texas5/19/984/25/01 66 FR 20751Originally submitted 11/9/94 and revised 8/9/96.
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3. Section 52.2309 is amended by adding paragraph (f) to read as follows:

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Emissions inventories.
* * * * *

(f) The Texas Natural Resource Conservation Commission submitted a revision to the State Implementation Plan (SIP) on May 19, 2000. This revision was submitted for the purpose of satisfying the 9 percent Rate-of-Progress requirements of the Clean Air Act, which will aid in ensuring the attainment of the National Ambient Air Quality Standards for ozone. This submission also contained revisions to the 1990 base year emissions inventory for the Houston/Galveston areas.

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[FR Doc. 01-10117 Filed 4-24-01; 8:45 am]