• DATES:
• ADDRESSES:
• FOR FURTHER INFORMATION CONTACT:
• SUPPLEMENTARY INFORMATION:
• Table of Contents
• I. Background
• II. EPA’s Analysis
• III. Proposed EPA Action and Request for Public Comment
• IV. Statutory and Executive Order Reviews
• List of Subjects in 40 CFR Part 52
• Footnotes

• Table 1—One-Hour Ozone Data for the Southeast Desert 1-Hour Ozone Nonattainment Area

Any comments must arrive by September 24, 2014.

Submit comments, identified by docket number EPA-R09-OAR-2014-0612, by one of the following methods:

• Federal eRulemaking Portal: www.regulations.gov. Follow the on-line instructions.
• E-Mail: kelly.thomasp@epa.gov.
• Mail or Deliver: Tom Kelly, Office of Air Planning (AIR-2), U.S. Environmental Protection Agency Region IX, 75 Hawthorne Street, San Francisco, CA 94105.

Instructions: All comments will be included in the public docket without change and may be made available online at www.regulations.gov, including any personal information provided, unless the comment includes Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Information that you consider CBI or otherwise protected should be clearly identified as such and should not be submitted through www.regulations.gov or email. The www.regulations.gov Web site is an “anonymous access” system, and EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send email directly to EPA, your email address will be automatically captured and included as part of the public comment. If EPA cannot read your comments due to technical difficulties and cannot contact you for clarification, EPA may not be able to consider your comment.

Docket: The index to the docket for this action is available electronically on the www.regulations.gov Web site and in hard copy at EPA Region IX, 75 Hawthorne Street, San Francisco, California, 94105. While all documents in the docket are listed in the index, some information may be publicly available only at the hard copy location (e.g., copyrighted material or large maps), and some may not be publicly available at either location (e.g., CBI). To inspect the hard copy materials, please schedule an appointment during normal business hours with the contact listed in the FOR FURTHER INFORMATION CONTACT section below.

Tom Kelly, Air Planning Office (AIR-2), U.S. Environmental Protection Agency, Region IX, (415) 972-3856, kelly.thomasp@epa.gov.

Throughout this document, the terms “we,” “us,” and “our” refer to EPA.

The Clean Air Act (CAA or “Act”) requires us to establish National Ambient Air Quality Standards (NAAQS or “standards”) for certain widespread pollutants, such as ozone, that cause or contribute to air pollution that is reasonably anticipated to endanger public health or welfare (see sections 108 and 109 of the Act). In 1979, we promulgated an ozone NAAQS of 0.12 parts per million (ppm), one-hour average (“1-hour ozone standard”). See 44 FR 8202, February 8, 1979.

An area is considered to have attained the 1-hour ozone standard if there are no violations of the standard, as determined in accordance with the regulation codified at 40 CFR section 50.9, based on three consecutive calendar years of complete, quality-assured and certified monitoring data. A violation occurs when the “expected number” of days per calendar year with maximum hourly average concentrations above 0.12 ppm is greater than one (1.0) at any site in the area, when averaged over three consecutive calendar years.
^[1]

An exceedance occurs when the maximum hourly ozone concentration during any day exceeds 0.124 ppm. For more information, please see “National 1-hour primary and secondary ambient air quality standards for ozone” (40 CFR 50.9) and “Interpretation of the 1-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone” (40 CFR part 50, appendix H).

The Act, as amended in 1990, required EPA to designate as nonattainment any ozone area that was still designated nonattainment under the 1977 Act Amendments, and any other area violating the 1-hour ozone standard, generally based on air quality monitoring data from the 1987 through 1989 period (section 107(d)(4) of the Act; 56 FR 56694, November 6, 1991). The 1990 Amended Act further classified these areas, based on the severity of their nonattainment problem, as Marginal, Moderate, Serious, Severe, or Extreme. In response, EPA designated the Southeast Desert Modified Air Quality Maintenance Area (AQMA) (“Southeast Desert”) as “Severe-17” nonattainment for the 1-hour ozone standard, with an attainment date no later than November 15, 2007.
^[2]

See 56 FR 56694, November 6, 1991. Outside of Indian country, the Los Angeles portion of the Southeast Desert lies within the Antelope Valley Air Quality Management District (AVAQMD), the San Bernardino County portion of the Southeast Desert lies within the Mojave Desert Air Quality Management District (MDAQMD), and the Riverside County portion of the Southeast Desert lies within the South Coast Air Quality Management District (SCAQMD).
^[3]

The control requirements and date by which attainment of the 1-hour ozone standard was to be achieved varied with an area’s classification. Marginal areas were subject to the fewest mandated control requirements and had the earliest attainment date, November 15, 1993, while Severe and Extreme areas were subject to more stringent planning requirements and were provided more time to attain the standard. Two measures that are triggered if a Severe or Extreme area failed to attain the standard by the applicable attainment date are contingency measures [section 172(c)(9)] and a major stationary source fee provision [sections 182(d)(3) and 185] (“major source fee program” or “section 185 fee program”).

In 1997, EPA promulgated an 8-hour ozone standard (0.08 ppm) (“1997 8-hour ozone standard”), 62 FR 38856 (July 18, 1997), to replace the 1-hour ozone standard. While the 1-hour ozone standard was revoked in 2005, we continue to determine whether areas attain, or fail to attain, the 1-hour ozone standard because of the continued applicability of certain 1-hour ozone control requirements in areas, such as the Southeast Desert, that are designated as nonattainment for the 1997 8-hour ozone standard and the connection between some of those requirements and attainment of the 1-hour ozone standard.

In the decades since the 1990 CAA Amendments, in large part due to decreases in upwind emissions of ozone precursors, 1-hour ozone concentrations in the Southeast Desert have decreased substantially. For instance, from 1990 to 2005, the number of exceedances of the standard in the Southeast Desert decreased from 27 to 4 at the Palm Springs monitor in Coachella Valley and from 59 to 3 at the Hesperia monitor in Victor Valley. However, despite the improvements, upon review of the ambient data for the three years preceding the applicable attainment date (i.e., 2005-2007), we determined that the Southeast Desert failed to attain the 1-hour ozone standard by the 2007 statutory deadline. See 76 FR 82133 (December 30, 2011).

In our proposal to determine that the Southeast Desert had failed to attain the standard, we noted that preliminary review of data from 2008 through 2010 suggested that the trend toward cleaner air in the Southeast Desert was continuing. 76 FR 56694, at 56700 (September 14, 2011). Indeed, the trend has continued with 2010-2012 being the first three-year period in which preliminary review of the data suggests that the Southeast Desert attained the standard. Given the further improvement in ozone conditions in the Southeast Desert, the California Air Resources Board (CARB) has requested that EPA make a determination that the Southeast Desert has attained the 1-hour ozone standard.
^[4]

Year 2013 data is now available, and thus EPA’s action herein is based on the most recent three-year period (2011-2013).

A determination of whether an area’s air quality meets the 1-hour ozone standard is generally based upon three years of complete,
^[5]

quality-assured and certified air quality monitoring data gathered at established State and Local Air Monitoring Stations (“SLAMS”) in the nonattainment area and entered into EPA’s Air Quality System (AQS) database. Data from air monitors operated by state/local agencies in compliance with EPA monitoring requirements must be submitted to the AQS database. Monitoring agencies annually certify that these data are accurate to the best of their knowledge. Accordingly, EPA relies primarily on data in its AQS database when determining the attainment status of an area. See 40 CFR 50.9; 40 CFR part 50, appendix H; 40 CFR part 53; 40 CFR part 58, appendices A, C, D and E. All data are reviewed to determine the area’s air quality status in accordance with 40 CFR part 50, appendix H.

Under EPA regulations at 40 CFR 50.9, the 1-hour ozone standard is attained at a monitoring site when the expected number of days per calendar year with maximum hourly average concentrations above 0.12 ppm is equal to or less than 1.0, as determined by 40 CFR part 50, appendix H.
^[6]

The CARB is the Primary Quality Assurance Organization (PQAO) responsible for assuring that the area meets air quality monitoring requirements in the Los Angeles County and San Bernardino County portions of the Southeast Desert, and the SCAQMD is the PQAO responsible for assuring that the requirements are met in the Riverside County portion of the Southeast Desert. The AVAQMD operates monitors in the Los Angeles County portion of the Southeast Desert; the MDAQMD operates monitors in the San Bernardino County portion of the Southeast Desert; and the SCAQMD operate monitors in the Riverside County portion of the Southeast Desert. All agencies are required to submit annual monitoring network plans to EPA. The AVAQMD and MDAQMD monitoring networks are included in the CARB annual network plan, while SCAQMD submits a separate annual network plan. These plans discuss the status of the air monitoring network, as required under 40 CFR 58.10.

With respect to the annual network plans submitted by CARB that includes the AVAQMD and MDAQMD monitors, we have reviewed these plans and found that they meet the applicable requirements under 40 CFR part 58.
^[7]

The Technical System Audit (TSA) we conducted in 2011 of the CARB PQAO included a review of the network requirements in AVAQMD and MDAQMD. In the TSA, we concluded that the combined ambient air monitoring networks operated by CARB and the air districts currently meet or exceed the requirements for the minimum number of SLAMS monitoring sites for ozone in the Southeast Desert. Also, AVAQMD and MDAQMD annually certify that the data submitted to AQS are quality-assured.
^[8]

EPA has reviewed SCAQMD’s plans for compliance with the applicable requirements in 40 CFR part 58 on an annual basis. With respect to ozone, EPA has found that the SCAQMD’s network plans meet the applicable requirements under 40 CFR part 58.
^[9]

Furthermore, we concluded in our TSA of the SCAQMD network conducted during April 2010, that the ambient air monitoring network operated by SCAQMD currently meets or exceeds the requirements for the minimum number of SLAMS monitoring sites for all criteria pollutants, and the ozone monitoring sites within the Southeast Desert are properly located with respect to monitoring objectives, spatial scales and other site criteria, as required by 40 CFR part 58, appendix D.
^[10]

Also, SCAQMD annually certifies that the data it submits to AQS are quality-assured.
^[11]

There were eight ozone monitoring sites located throughout the Southeast Desert in calendar years 2011 through 2013 that collected data for regulatory purposes: one in Los Angeles County, two in Riverside County, and five in San Bernardino County.
^[12]

All of the sites monitor ozone concentrations on a continuous basis using Federal Equivalent Method (FEM) monitors. AVAQMD operates the one monitor in Los Angeles County. SCAQMD operates two in Riverside County. MDAQMD operates four in San Bernardino County. The National Park Service operates one monitor in San Bernardino County at Joshua Tree National Park (Yucca Valley).
^[13]

Also, the National Park Service annually certifies that the data it submits to AQS are quality-assured.
^[14]

Table 1 summarizes the ozone monitoring data from the various monitoring sites in the Southeast Desert, showing the expected exceedances per year and as an average over the 2011-2013 period. The data summarized in table 1 are considered complete for the purposes of determining if the standard is met.
^[15]

Generally, the highest ozone concentrations in the Southeast Desert occur in the far southwestern portion of the area, near mountain passes through which pollutants are transported to the Southeast Desert from the South Coast Air Basin. As shown in table 1, the highest three-year average of expected exceedances at any site in the Southeast Desert for 2011-2013 is 0.3 at Palm Springs in Riverside County and Hesperia in San Bernardino County. The calculated exceedance rate of 0.3 represents attainment of the 1-hour ozone standard (a three-year average of expected exceedances less than or equal to 1).

Taking into account the extent and reliability of the applicable ozone monitoring network, and the data collected therefrom and summarized in table 1, we propose to determine that the Southeast Desert has attained the 1-hour ozone standard (as defined in 40 CFR part 50, appendix H) based on the most recent three years of monitoring data for the area (2011-2013). Data for 2014 will be reviewed prior to our final action to ensure that it is consistent with continued attainment of the 1-hour ozone standard in the Southeast Desert.

EPA is proposing to determine that the Southeast Desert Area has attained the 1-hour ozone standard based on complete, quality-assured and certified ambient air quality monitoring data for the 2011-2013 monitoring period.

EPA is soliciting public comments on the issues discussed in this document or on other relevant matters. We will accept comments from the public on this proposal for the next 30 days. We will consider these comments before taking final action.

This action proposes to make a determination based on air quality data and does not impose additional requirements beyond those imposed by state law. For that reason, this proposed action:

• Is not a “significant regulatory action” subject to review by the Office of Management and Budget under Executive Order 12866 (58 FR 51735, October 4, 1993);
• Does not impose an information collection burden under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
• Is certified as not having a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act (5 U.S.C. 601 et seq.);
• Does not contain any unfunded mandate or significantly or uniquely affect small governments, as described in the Unfunded Mandates Reform Act of 1995 (Pub. L. 104-4);
• Does not have Federalism implications as specified in Executive Order 13132 (64 FR 43255, August 10, 1999); is not an economically significant regulatory action based on health or safety risks subject to Executive Order 13045 (62 FR 19885, April 23, 1997);
• Is not a significant regulatory action subject to Executive Order 13211 (66 FR 28355, May 22, 2001);
• Is not subject to requirements of section 12(d) of the National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 note) because application of those requirements would be inconsistent with the CAA; and,
• Does not provide EPA with the discretionary authority to address, as appropriate, disproportionate human health or environmental effects, using practicable and legally permissible methods, under Executive Order 12898 (59 FR 7629, February 16, 1994).

In addition, this rule does not have tribal implications as specified by Executive Order 13175 (65 FR 67249, November 9, 2000), because it will not impose substantial direct costs on tribal governments or preempt tribal law.

[FR Doc. 2014-20220 Filed 8-22-14; 8:45 am]

BILLING CODE 6560-50-P