Source: https://www.federalregister.gov/documents/2012/10/30/2012-26629/determination-of-attainment-for-the-chico-nonattainment-area-for-the-2006-fine-particle-standard
Timestamp: 2018-08-21 20:28:13
Document Index: 125307221

Matched Legal Cases: ['art 50', 'art 53', 'art 58', 'art 58', 'art 50', 'art 50', 'art 50', 'art 58', 'art 58', 'art 58', 'art 50', 'art 50', 'art 1', 'art 50', 'art 58', 'art 58', 'art 50', 'art 58', 'art 50', 'art 1', 'art 1']

Federal Register :: Determination of Attainment for the Chico Nonattainment Area for the 2006 Fine Particle Standard; California; Determination Regarding Applicability of Clean Air Act Requirements
A Proposed Rule by the Environmental Protection Agency on 10/30/2012
77 FR 65651
65651-65656 (6 pages)
EPA-R09-OAR-2012-0800
FRL-9746-9
2012-26629
Proposed Rule, “Determination of Attainment for the Chico...
A. PM2.5 NAAQS
B. Designation of PM2.5 Nonattainment Areas
https://www.federalregister.gov/d/2012-26629 https://www.federalregister.gov/d/2012-26629
EPA is proposing to determine that the Chico nonattainment area in California has attained the 2006 24-hour fine particle (PM2.5) National Ambient Air Quality Standard (NAAQS). This proposed determination is based upon complete, quality-assured, and certified ambient air monitoring data showing that this area has monitored attainment of the 2006 24-hour PM2.5 NAAQS based on the 2009-2011 monitoring period. EPA is further proposing that, if EPA finalizes this determination of attainment, the requirements for this area to submit an attainment demonstration, together with reasonably available control measures (RACM), a reasonable further progress (RFP) plan, and contingency measures for failure to meet RFP and attainment deadlines shall be suspended for so long as the area continues to attain the 2006 24-hour PM2.5 NAAQS.
Submit your comments, identified by Docket ID No. EPA-R09-OAR-2012-0800 by one of the following methods:
A. Application of EPA's Clean Data Policy to the 2006 p.m.2.5 NAAQS
EPA is proposing to determine that the Chico nonattainment area has clean data for the 2006 24-hour NAAQS for fine particles (generally referring to particles less than or equal to 2.5 micrometers in diameter, PM2.5). This determination is based upon complete, quality-assured, and certified ambient air monitoring data showing the area has monitored attainment of the 2006 p.m.2.5 NAAQS based on 2009-2011 monitoring data. Preliminary data in EPA's Air Quality System (AQS) for 2012 indicate that the area continues to attain the 2006 p.m.2.5 NAAQS. Based on this determination, we are also proposing to suspend the obligations on the State of California to submit certain state implementation plan (SIP) revisions related to attainment of this standard for the Chico nonattainment area for as long as the area continues to attain the standard.
On July 18, 1997, EPA revised the NAAQS for particulate matter to add new standards for PM2.5, using PM2.5 as the indicator for the pollutant. EPA established primary and secondary [1] annual and 24-hour standards for PM2.5 (62 FR 38652). The annual standard was set at 15.0 micrograms per cubic meter (μg/m3), based on a 3-year average of annual mean PM2.5 concentrations, and the 24-hour standard was set at 65 μg/m3, based on the 3-year average of the 98th percentile of 24-hour PM2.5 concentrations at each population-oriented monitor within an area.
On October 17, 2006 (71 FR 61144), EPA revised the level of the 24-hour PM2.5 NAAQS to 35 μg/m3, based on a 3-year average of the 98th percentile of 24-hour concentrations. EPA also retained the 1997 annual PM2.5 standard at 15.0 μg/m3 based on a 3-year average of annual mean PM2.5 concentrations, but with tighter constraints on the spatial averaging criteria.
Effective December 14, 2009, EPA established the initial air quality designations for most areas in the United States for the 2006 24-hour PM2.5 NAAQS. See 74 FR 58688; (November 13, 2009). Among the various areas designated in 2009, EPA designated the Chico [2] area in California as nonattainment for the 2006 24-hour PM2.5 NAAQS.[3] The boundaries for this area are described in 40 CFR 81.305.
Within three years of the effective date of designations, states with areas designated as nonattainment for the 2006 PM2.5 NAAQS are required to submit SIP revisions that, among other elements, provide for implementation of reasonably available control measures (RACM), reasonable further progress (RFP), attainment of the standard as expeditiously as practicable but no later than five years from the nonattainment designation (in this instance, no later than December 14, 2014), as well as contingency measures. See CAA section 172(a)(2), 172(c)(1), 172(c)(2), and 172(c)(9). Prior to the due date for submittal of these SIP revisions, the State of California requested that EPA make determinations that the Chico [4] nonattainment area has attained the 2006 PM2.5 NAAQS and that attainment-related SIP submittal requirements are not applicable for as long as the area continues to attain the standard. Today's proposal responds to the State's request.
A determination of whether an area's air quality currently meets the PM2.5 NAAQS is generally based upon the most recent three years of complete, quality-assured data gathered at established State and Local Air Monitoring Stations (SLAMS) in a nonattainment area and entered into the AQS database. Data from air monitors operated by state/local agencies in compliance with EPA monitoring requirements must be submitted to AQS. Monitoring agencies annually certify that these data are accurate to the best of their knowledge. Accordingly, EPA relies primarily on data in AQS when determining the attainment status of areas. See 40 CFR 50.13; 40 CFR part 50, appendix L; 40 CFR part 53; 40 CFR part 58, and 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 N.
Under EPA regulations in 40 CFR part 50, section 50.13 and in accordance with appendix N, the 2006 24-hour PM2.5 standard is met when the design value is less than or equal to 35 μg/m[3] (based on the rounding convention in 40 CFR part 50, appendix N) at each monitoring site within the area.[5] The PM2.5 24-hour average is considered valid when 75 percent of the hourly averages for the 24-hour period are available. Data completeness requirements for a given year are met when at least 75 percent of the scheduled sampling days for each quarter have valid data.
The California Air Resources Board (CARB) and local Air Pollution Control Districts and Air Quality Management Districts (“Districts”) operate ambient monitoring stations throughout the State. CARB is the lead monitoring agency in the Primary Quality Assurance Organization [6] (PQAO) that includes all the monitoring agencies in the State with a few exceptions.[7] CARB is responsible for monitoring ambient air quality within the Chico nonattainment area. In addition, CARB oversees the quality assurance of all data collected within the CARB PQAO. CARB submits annual monitoring network plans to EPA that describe the monitoring sites CARB operates. These plans discuss the status of the air monitoring network, as required under 40 CFR part 58.10.
Since 2007, EPA has regularly reviewed these annual plans for compliance with the applicable reporting requirements in 40 CFR part 58. With respect to PM2.5, EPA has found that CARB's network plans meet the applicable requirements under 40 CFR part 58. See EPA letters to CARB approving its annual network plans for years 2009, 2010, and 2011.[8] EPA also concluded [9] from its Technical System Audit of the CARB PQAO (conducted during the summer of 2007) that the ambient air monitoring network operated by CARB currently meets or exceeds the requirements for the minimum number of SLAMS for PM2.5 in the Chico nonattainment area. Also, CARB annually certifies that the data it submits to AQS are complete and quality-assured.[10]
There was one PM2.5 SLAMS operating during the 2009-2011 period in the Chico PM2.5 nonattainment area. The site is operated by CARB and has been monitoring PM2.5 concentrations since 1999. EPA defines specific monitoring site types and spatial scales of representativeness to characterize the nature and location of required monitors. With respect to the Chico site, the spatial scale is neighborhood scale,[11] and the monitoring objectives (site types) are population exposure and highest concentration.[12]
Consistent with the requirements contained in 40 CFR part 50, we have reviewed the quality-assured, and certified PM2.5 ambient air monitoring data as recorded in AQS for the applicable monitoring period collected at the monitoring site in the Chico nonattainment area and have found the data to be complete. However, under our monitoring regulations in 40 CFR 58.12(d)(1), at the Chico monitor, CARB should be monitoring on a one-in-three day schedule rather than on a one-in-six day schedule. In addition, the 2009-2011 design value (35 μg/m[3] ) is within 5 percent of the 24-hour PM2.5 NAAQS, triggering a daily sampling frequency required starting January 2013. See 40 CFR 58.12(d)(1)(iii). In response, CARB has agreed to increase the sampling frequency.[13] The increased number of samples would provide sufficient information to evaluate the area's continued attainment of the 2006 p.m.2.5 NAAQS if we finalize this proposed determination of attainment for the Chico nonattainment area.
EPA's evaluation of whether the Chico PM2.5 nonattainment area has attained the 2006 24-hour PM2.5 NAAQS is based on our review of the monitoring data and takes into account the adequacy [14] of both the PM2.5 monitoring network in the nonattainment area and the reliability of the data collected by the network as discussed in the previous section of this document.
Table 1 shows the PM2.5 design value for the Chico nonattainment area monitor based on ambient air quality monitoring data for the most recent complete three-year period (2009-2011). The data show that the design value for the 2009-2011 period was equal to or less than 35 μg/m[3] at the monitor. Therefore, we are proposing to determine, based on the complete, quality-assured data for 2009-2011, that the Chico area has attained the 2006 24-hour PM2.5 standard. Preliminary data available in AQS for 2012 indicate that the area continues to attain the standard.[15]
Table 1—2009-2011 24-Hour PM2.5 Monitoring Site and Design Value for the Chico Nonattainment Area
AQS site identification No.
98th Percentile(µg/m3)
2009-2011 design value (µg/m3)
Chico 06-007-0002 30.0 29.0 46.2 a 35
a The average of the 98th percentile values for 2009-2011 equals 35.1, but consistent with applicable rounding conventions in 40 CFR part 50, appendix N, section 4.3, 24-hour standard design values are rounded to the nearest 1 µg/m3 (decimals 0.5 and greater are rounded up to the nearest whole number, and any decimal lower than 0.5 is rounded down to the nearest whole number).
Source: Design Value Report, August 31, 2012 (in the docket to this proposed action).
In April 2007, EPA issued its PM2.5 Implementation Rule for the 1997 PM2.5 standard. 72 FR 20586; (April 25, 2007). In March, 2012, EPA published implementation guidance for the 2006 PM2.5 standard. See Memorandum from Stephen D. Page, Director, Office of Air Quality Planning and Standards, “Implementation Guidance for the 2006 24-Hour Fine Particle (PM2.5) National Ambient Air Quality Standards (NAAQS)” (March 2, 2012). In that guidance, EPA stated its view “that the overall framework and policy approach of the 2007 PM2.5 Implementation Rule continues to provide effective and appropriate guidance on the EPA's interpretation of the general statutory requirements that states should address in their SIPs. In general, the EPA believes that the interpretations of the statute in the framework of the 2007 PM2.5 Implementation Rule are relevant to the statutory requirements for the 2006 24-hour PM2.5 NAAQS * * *.” Id., page 1. With respect to the statutory provisions applicable to 2006 PM2.5 implementation, the guidance emphasized that “EPA outlined its interpretation of many of these provisions in the 2007 PM2.5 Implementation Rule. In addition to regulatory provisions, the EPA provided substantial general guidance for attainment plans for PM2.5 in the preamble to the final the [sic] 2007 PM2.5 Implementation Rule.” Id., page 2. In keeping with the principles set forth in the guidance, and with respect to the effect of a determination of attainment for the 2006 PM2.5 standard, EPA is applying the same interpretation with respect to the implications of clean data determinations that it set forth in the preamble to the 1997 PM2.5 standard and in the regulation that embodies this interpretation. 40 CFR 51.1004(c).[16] EPA has long applied this interpretation in regulations and individual rulemakings for the 1-hour ozone and 1997 8-hour ozone standards, the PM-10 standard, and the lead standard.
Following enactment of the CAA Amendments of 1990, EPA promulgated its interpretation of the requirements for implementing the NAAQS in the General Preamble for the Implementation of Title I of the CAA Amendments of 1990 (General Preamble) 57 FR 13498, 13564 (April 16, 1992). In 1995, based on the interpretation of CAA sections 171 and 172, and section 182 in the General Preamble, EPA set forth what has become known as its “Clean Data Policy” for the 1-hour ozone NAAQS. See Memorandum from John S. Seitz, Director, Office of Air Quality Planning and Standards, “Reasonable Further Progress, Attainment Demonstration, and Related Requirements for Ozone Nonattainment Areas Meeting the Ozone National Ambient Air Quality Standard” (May 10, 1995). In 2004, EPA indicated its intention to extend the Clean Data Policy to the PM2.5 NAAQS. See Memorandum from Steve Page, Director, EPA Office of Air Quality Planning and Standards, “Clean Data Policy for the Fine Particle National Ambient Air Quality Standards” (December 14, 2004).
Since 1995, EPA has applied its interpretation under the Clean Data Policy in many rulemakings, suspending certain attainment-related planning requirements for individual areas, based on a determination of attainment. See 60 FR 36723 (July 18, 1995) (Salt Lake and Davis Counties, Utah, 1-hour ozone); 61 FR 20458 (May 7, 1996) (Cleveland-Akron-Lorain, Ohio, 1-hour ozone); 61 FR 31832 (June 21, 1996) (Grand Rapids, Michigan, 1-hour ozone); 65 FR 37879 (June 19, 2000) (Cincinnati-Hamilton, Ohio-Kentucky, 1-hour ozone); 66 FR 53094 (October 19, 2001) (Pittsburgh-Beaver Valley, Pennsylvania, 1-hour ozone); 68 FR 25418 (May 12, 2003) (St. Louis, Missouri-Illinois, 1-hour ozone); 69 FR 21717 (April 22, 2004) (San Francisco Bay Area, California, 1-hour ozone); 75 FR 6570 (February 10, 2010) (Baton Rouge, Louisiana, 1-hour ozone); 75 FR 27944 (May 19, 2010) (Coso Junction, California, PM10).
EPA also incorporated its interpretation under the Clean Data Policy in several implementation rules. See Clean Air Fine Particle Implementation Rule, 72 FR 20586 (April 25, 2007); Final Rule To Implement the 8-Hour Ozone National Ambient Air Quality Standard—Phase 2, 70 FR 71612 (November 29, 2005). The Court of Appeals for the District of Columbia Circuit (D.C. Circuit) upheld EPA's rule embodying the Clean Data Policy for the 1997 8-hour ozone standard. NRDC v. EPA, 571 F.3d 1245 (D.C. Cir. 2009). Other courts have reviewed and considered individual rulemakings applying EPA's Clean Data Policy, and have consistently upheld them in every case. Sierra Club v. EPA, 99 F.3d 1551 (10th Cir. 1996); Sierra Club v. EPA, 375 F.3d 537 (7th Cir. 2004); Our Children's Earth Foundation v. EPA, No. 04-73032 (9th Cir. June 28, 2005 (Memorandum Opinion)), Latino Issues Forum v. EPA, Nos. 06-75831 and 08-71238 (9th Cir. March 2, 2009 (Memorandum Opinion)).
EPA sets forth below a brief explanation of the statutory interpretations in the Clean Data Policy. EPA also incorporates the discussions of its interpretation set forth in prior rulemakings, including the 1997 PM2.5 implementation rulemaking. See 72 FR 20586, at 20603-20605 (April 25, 2007). See also 75 FR 31288 (June 3, 2010) (Providence, Rhode Island, 1997 8-hour ozone); 75 FR 62470 (October 12, 2010) (Knoxville, Tennessee, 1997 8-hour ozone); 75 FR 53219 (August 31, 2010) (Greater Connecticut Area, 1997 8-hour ozone); 75 FR 54778 (September 9, 2010) (Baton Rouge, Louisiana, 1997 8-hour ozone); 75 FR 64949 (October 21, 2010) (Providence, Rhode Island, 1997 8-hour ozone); 76 FR 11080 (March 1, 2011) (Milwaukee-Racine and Sheboygan Areas, Wisconsin, 1997 8-hour ozone); 76 FR 31237 (May 31, 2011) (Pittsburgh-Beaver Valley, Pennsylvania, 1997 8-hour ozone); 76 FR 33647 (June 9, 2011) (St. Louis, Missouri-Illinois, 1997 8-hour ozone); 76 FR 70656 (November 15, 2011) (Charlotte-Gastonia-Rock Hill, North Carolina-South Carolina, 1997 8-hour ozone); 77 FR 31496 (May 29, 2012) (Boston-Lawrence-Worchester, Massachusetts, 1997 8-hour ozone). See also, 75 FR 56 (January 4, 2010) (Greensboro-Winston-Salem-High Point, North Carolina, 1997 PM2.5); 75 FR 230 (January 5, 2010) (Hickory-Morganton-Lenoir, North Carolina, 1997 PM2.5); 76 FR 12860 (March 9, 2011) (Louisville, Kentucky-Indiana, 1997 PM2.5); 76 FR 18650 (April 5, 2011) (Rome, Georgia, 1997 PM2.5); 76 FR 31239 (May 31, 2011) (Chattanooga, Tennessee-Georgia-Alabama, 1997 PM2.5); 76 FR 31858 (June 2, 2011) (Macon, Georgia, 1997 PM2.5); 76 FR 36873 (June 23, 2011) (Atlanta, Georgia, 1997 PM2.5); 76 FR 38023 (June 29, 2011) (Birmingham, Alabama, 1997 PM2.5); 76 FR 55542 (September 7, 2011) (Huntington-Ashland, West Virginia-Kentucky-Ohio, 1997 PM2.5); 76 FR 60373 (September 29, 2011) (Cincinnati, Ohio-Kentucky-Indiana, 1997 PM2.5); 77 FR 18922 (March 29, 2012) (Harrisburg-Lebanon-Carlisle-York, Allentown, Johnstown and Lancaster, Pennsylvania, 1997 PM2.5).
The Clean Data Policy represents EPA's interpretation that certain requirements of subpart 1 of part D of the Act are by their terms not applicable to areas that are currently attaining the NAAQS.[17] As explained below, the specific requirements that are inapplicable to an area attaining the standard are the requirements to submit a SIP that provides for: Attainment of the NAAQS; implementation of all reasonably available control measures; reasonable further progress (RFP); and implementation of contingency measures for failure to meet deadlines for RFP and attainment.
CAA section 172(c)(1), the requirement for an attainment demonstration, provides in relevant part that SIPs “shall provide for attainment of the [NAAQS].” EPA has interpreted this requirement as not applying to areas that have already attained the standard. If an area has attained the standard, there is no need to submit a plan demonstrating how the area will reach attainment. In the General Preamble (57 FR 13564), EPA stated that no other measures to provide for attainment would be needed by areas seeking redesignation to attainment since “attainment will have been reached.” See also Memorandum from John Calcagni, “Procedures for Processing Requests to Redesignate Areas to Attainment,” (September 4, 1992), at page 6.
A component of the attainment plan specified under section 172(c)(1) is the requirement to provide for “the implementation of all reasonably available control measures as expeditiously as practicable” (RACM). Since RACM is an element of the attainment demonstration, see General Preamble (57 FR 13560), for the same reason the attainment demonstration no longer applies by its own terms, RACM also no longer applies to areas that EPA has determined have clean air. Furthermore, EPA has consistently interpreted this provision to require only implementation of such potential RACM measures that could advance attainment.[18] Thus, where an area is already attaining the standard, no additional RACM measures are required. EPA's interpretation that the statute requires only implementation of the RACM measures that would advance attainment was upheld by the United States Court of Appeals for the Fifth Circuit (Sierra Club v. EPA, 314 F.3d 735, 743-745, 5th Cir. 2002) and by the United States Court of Appeals for the D.C. Circuit (Sierra Club v. EPA, 294 F.3d 155, 162-163, D.C. Cir. 2002). See also the final rulemakings for Pittsburgh-Beaver Valley, Pennsylvania, 66 FR 53096 (October 19, 2001) and St. Louis, Missouri-Illinois, 68 FR 25418 (May 12, 2003).
CAA section 172(c)(9) provides that SIPs in nonattainment areas “shall provide for the implementation of specific measures to be undertaken if the area fails to make reasonable further progress, or to attain the [NAAQS] by the attainment date applicable under this part. Such measures shall be included in the plan revision as contingency measures to take effect in any such case without further action by the State or [EPA].” This contingency measure requirement is inextricably tied to the reasonable further progress and attainment demonstration requirements. Contingency measures are implemented if reasonable further progress targets are not achieved, or if attainment is not realized by the attainment date. Where an area has already achieved attainment, it has no need to rely on contingency measures to come into attainment or to make further progress to attainment. As EPA stated in the General Preamble: “The section 172(c)(9) requirements for contingency measures are directed at ensuring RFP and attainment by the applicable date.” See 57 FR 13564. Thus these requirements no longer apply when an area has attained the standard.
It is important to note that should an area attain the 2006 PM2.5 standard based on three years of data, its obligation to submit an attainment demonstration and related planning submissions is suspended only for so long as the area continues to attain the standard. If EPA subsequently determines, after notice-and-comment rulemaking, that the area has violated the NAAQS, the requirements for the State to submit a SIP to meet the previously suspended requirements would be reinstated. It is likewise important to note that the area remains designated nonattainment pending a further redesignation action.
EPA is proposing to determine that the Chico nonattainment area in California has attained the 2006 24-hour PM2.5 standard based on the most recent three years of complete, quality-assured, and certified data for 2009-2011. Preliminary data available in AQS for 2012 show that the area continues to attain the standard.
EPA further proposes that, if its proposed determination of attainment is made final, the requirements for the Chico nonattainment area to submit an attainment demonstration and associated RACM, a RFP plan, contingency measures, and any other planning SIPs related to attainment of the 2006 PM2.5 NAAQS would be suspended for so long as the area continues to attain the 2006 PM2.5 NAAQS. EPA's proposal is consistent and in keeping with its long-held interpretation of CAA requirements, as well as with EPA's regulations for similar determinations for ozone (see 40 CFR 51.918) and the 1997 fine particulate matter standards (see 40 CFR 51.1004(c)). As described below, any such determination would not be equivalent to the redesignation of the area to attainment for the 2006 PM2.5 NAAQS.
If the Chico nonattainment area continues to monitor attainment of the 2006 PM2.5 NAAQS, EPA proposes that the requirements for the area to submit an attainment demonstration and associated RACM, a RFP plan, contingency measures, and any other planning requirements related to attainment of the 2006 PM2.5 NAAQS will remain suspended. If this proposed rulemaking is finalized and EPA subsequently determines, after notice-and-comment rulemaking in the Federal Register, that the area has violated the 2006 PM2.5 NAAQS, the basis for the suspension of these attainment planning requirements for the Chico nonattainment area would no longer exist, and the area would thereafter have to address such requirements.
2. The Chico PM2.5 nonattainment area includes the southwestern two-thirds of Butte County, California. Butte County lies in the central portion of northern California's Sacramento Valley Air Basin, which stretches from Sacramento County in the south to Shasta County in the north.
3. With respect to the annual PM2.5 NAAQS, this area is designated as “unclassifiable/attainment.”
4. On June 2, 2011, James Goldstene, Executive Officer of the California Air Resources Board, submitted a request to Jared Blumenfeld, Regional Administrator, U.S. EPA Region IX, to find the Chico PM2.5 nonattainment area had attained the 2006 24-hour PM2.5 NAAQS.
5. The PM2.5 24-hour standard design value is the 3-year average of annual 98th percentile 24-hour average values recorded at each monitoring site [see 40 CFR part 50, appendix N, section 1.0(c)], and the 24-hour PM2.5 NAAQS is met when the 24-hour standard design value at each monitoring site is less than or equal to 35 μg/m3. .
6. Primary quality assurance organization means a monitoring organization or other organization that is responsible for a set of stations that monitor the same pollutant and for which data quality assessments can be pooled (40 CFR 58.1).
7. The Bay Area Air Quality Management District, the South Coast Air Quality Management District, and the San Diego Air Pollution Control District are each designated as the PQAO for their respective ambient air monitoring programs.
8. Letter from Joe Lapka, Acting Manager, Air Quality Analysis Office, U.S. EPA Region IX, to Karen Magliano, Chief, Air Quality Data Branch, Planning and Technical Support Division, CARB (November 24, 2009) (approving CARB's “2009 Annual Monitoring Network Report for Small Districts in California”); Letter from Matthew Lakin, Manager, Air Quality Analysis Office, U.S. EPA Region IX, to Karen Magliano, Chief, Air Quality Data Branch, Planning and Technical Support Division, CARB (October 29, 2010) (approving CARB's “2010 Annual Monitoring Network Plan for the Small Districts in California”); Letter from Matthew Lakin, Manager, Air Quality Analysis Office, U.S. EPA Region IX, to Karen Magliano, Chief, Air Quality Data Branch, Planning and Technical Support Division, CARB (November 1, 2011) (approving CARB's “2011 Annual Monitoring Network Plan for the Small Districts in California”).
9. See letter from Deborah Jordan, Director, Air Division, U.S. EPA Region IX, to James Goldstene, Executive Officer, CARB, transmitting ”Technical System Audit of the California Environmental Protection Agency Air Resources Board: 2007,” with enclosure, August 18, 2008.
10. See, e.g., letter from Karen Magliano, Chief, Air Quality Data Branch, Planning and Technical Support Division, CARB, to Jared Blumenfeld, Regional Administrator, U.S. EPA Region IX, certifying calendar year 2011 ambient air quality data and quality assurance data, May 1, 2012.
11. In this context, “neighborhood” spatial scale defines concentrations within some extended area of the city that has relatively uniform land use with dimensions in the 0.5 to 4.0 kilometers range. See 40 CFR part 58, appendix D, section 1.2.
12. See CARB's 2011 Annual Network Plan Report (June, 2011); U.S. EPA Air Quality System, Monitor Description Report, September 14, 2012.
13. In CARB's August 15, 2012 letter to Matthew Lakin, Manager, Air Quality Analysis Office, EPA Region IX, Karen Magliano, Chief, Air Quality Data Branch, Planning and Technical Support Division agreed to increase the monitoring frequency to one-in-three day beginning on October 1, 2012 and to daily sampling beginning January 1, 2013 at the Chico monitoring site to ensure that the Chico area continues to meet the requirements of 40 CFR 58.12(d)(1) for monitoring frequency.
14. Meets the requirements of 40 CFR part 58.
15. The Butte County Air Quality Management District and Butte County Department of Public Health issued Joint Air Quality Advisories on August 2, 6, 10, and 14, 2012 because of high PM2.5 levels in the Butte County foothills region apparently caused by smoke from a wildfire (i.e., Chips Fire). EPA's proposed determination is based on 2009-2011 data from the Federal Reference Method (FRM) monitor at the Chico site. There is a non-Federal Equivalent Method (FEM) monitor located in Paradise. Because the non-FEM monitor in Paradise does not meet federal requirements in 40 CFR part 50, Appendix L or 40 CFR part 58, the data from the Paradise monitor is not appropriate for use in determining if the Chico nonattainment area attained the 2006 24-hour PM2.5 NAAQS standard. See 40 CFR part 50, Appendix N, section 3.0(a).
16. While EPA recognizes that 40 CFR 51.1004(c) does not itself expressly apply to the 2006 PM2.5 standard, the statutory interpretation that it embodies is identical and is applicable to both the 1997 and 2006 PM2.5 standards.
17. This discussion refers to subpart 1 because subpart 1 contains the requirements relating to attainment of the 2006 PM2.5 NAAQS.
18. This interpretation was adopted in the General Preamble, see 57 FR 13498, and has been upheld as applied to the Clean Data Policy, as well as to nonattainment SIP submissions. See NRDC v. EPA, 571 F.3d 1245 (D.C. Cir. 2009); Sierra Club v. EPA, 294 F.3d 155 (D.C. Cir. 2002).
[FR Doc. 2012-26629 Filed 10-29-12; 8:45 am]