State of California 

AIR RESOURCES BOARD 

Approval and Submittal of the Town of Mammoth Lakes 

PM1o Maintenance Plan and Redesignation Request 

Resolution 14-27 

September 18, 2014 

Agenda Item: 14-7-2 

WHEREAS, the Legislature in Health and Safety Code section 39602 has designated 

the State Air Resources Board (ARB or Board) as the air pollution control agency for all 

. purposes set forth in federal law; 

WHEREAS, ARB is responsible for preparing the State Implementation Plan (SIP) for 

attaining and maintaining the national ambient air quality standards (NAAQS) as 

required by the federal Clean Air Act (the Act; 42 U.S.C. section 7401 et seq.), and to 

this end is directed by Health and Safety Code section 39602 to coordinate the activities 

of all local and regional air pollution control and air quality management districts 

(districts) necessary to comply with the Act; 

WHEREAS, section 39602 of the Health and Safety Code also provides that the SIP 

shall include only those provisions necessary to meet the requirements of the Act; 

WHEREAS, ARB has responsibility for ensuring districts meet their responsibilities 

under the Act pursuant to sections 39002, 39500, 39602, and 41650 of the Health and 

Safety Code; 

WHEREAS, ARB is authorized by section 39600 of the Health and Safety Code to do 

such acts as may be necessary for the proper execution of its powers and duties; 

WHEREAS, sections 39515 and 39516 of the Health and Safety Code provide that any 

power, duty, purpose, function or jurisdiction of the Board may be delegated to the ARB 

Executive Officer as the Board deems appropriate; 

WHEREAS, the districts have primary responsibility for controlling air pollution from 

non-vehicular sources and for adopting control measures, rules, and regulations to 

attain the NAAQS within their boundaries pursuant to sections 39002, 40000, 40001, 

40701,40702, and 41650 of the Health and Safety Code; 

WHEREAS, the Great Basin Unified Air Pollution Control District (District) was 

established pursuant to section 40150 of the Health and Safety Code as the air pollution 
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control district responsible for carrying out these responsibilities in Alpine, lnyo, and 

Mono Counties; 

WHEREAS, the Mammoth Lakes Planning Area (Mammoth Lakes) within Mono County 

was automatically designated as a "moderate" PM1o non attainment area for the 24-hour 

PM10 standard of 150 j.Jg/m3 with an attainment date of December 31, 1994; 

WHEREAS, in December 1990, the District and the Town of Mammoth Lakes adopted 

the 1990 Air Quality Management Plan (1990 Plan) to control emissions from residential 

wood combustion and road sanding; 

WHEREAS, the District submitted the 1990 Plan and subsequently-adopted plan 

amendments to ARB with requests that the 1990 Plan be approved and submitted to 

United States Environmental Protection Agency (U.S. EPA); 

WHEREAS, ARB submitted the 1990 Plan and subsequent amendments to U.S. EPA 

on September 11, 1991, and March 11, 1992, respectively; 

WHEREAS, U.S. EPA approved the 1990 Plan and amendments as a fully approved 

revision to the California SIP on June 24, 1996; 

WHEREAS, implementation of the 1990 Plan reduced winter PM1o emissions to the 

extent that an exceedance of the 24-hour PM10 standard has not occurred since 1993 in 

Mammoth Lakes; 

WHEREAS, section 1 07(d)(3)(D) of the Act provides that a state may request U.S. EPA 

to redesignate an area from nonattainment to attainment for the NAAQS; 

WHEREAS, section 1 07(d)(3)(E) of the Act sets forth the requirements which must be 

met for U.S. EPA to redesignate an area from nonattainment to attainment; 

WHEREAS, the District developed the Town of Mammoth Lakes PM1o Maintenance 

Plan and Redesignation Request (Maintenance Plan/Redesignation Request) to 

address the requirements of the Act; 

WHEREAS, consistent with section 1 07(d)(3)(E)(i) of the Act, the District demonstrated 

continued attainment in Mammoth Lakes with no violations of the PM1 0 NAAQS 

recorded since the 1991-1993 period, based on quality-assured federal reference 

monitoring method data from the local monitoring network; 

WHEREAS, consistent with section 1 07(d)(3)(E)(ii) of the Act, the 1990 Plan was 

approved by U.S. EPA on June 24, 1996, with respect to the requirements of 

section 11 O(k) and other applicable requirements of the Clean Air Act; 

WHEREAS, consistent with section 1 07(d)(3)(E)(iii) of the Act, the Maintenance 

Plan/Redesignation Request documents the changes in residential wood burning and 
Resolution 14-27 3 

road sanding practices that resulted from implementation of Mammoth Lakes' town 

ordinances that were responsible for reductions in PM1o emissions and improvements to 

PM10 air quality in Mammoth Lakes between 1990 and 1993; 

WHEREAS, consistent with section 1 07(d)(3)(E)(iv) of the Act, the District prepared the 

Maintenance Plan/Redesignation Request to document that PM10 peak-day emissions 

in Mammoth Lakes remain substantially below levels that would result in an exceedance 

of the NAAQS and conform with U.S. EPA guidance; 

WHEREAS, consistent with section 1 07(d)(3)(E)(v) of the Act, the District prepared the 

Maintenance Plan/Redesignation Request in part to meet the applicable requirements 

of section 110 and Title I, part D of the Act; 

WHEREAS, consistent with section 176 of the Act, the District developed transportation 

conformity budgets for PM10 using the most recent estimates of emissions for 2012 and 

projections to 2030; 

WHEREAS, the District conducted a public hearing on May 5, 2014, after giving 30 day 

public notice of the Maintenance Plan/Redesignation Request availability for public 

review and comment prior to the hearing date; 

WHEREAS, at the May 5, 2014, public hearing the District Board voted to: 

1. Adopt the Maintenance Plan/Redesignation Request to fulfill the applicable 

requirements of the Act for maintenance of an attainment area for the PM1o 

NAAQS; and 

2. Request a redesignation for Mammoth Lakes to attainment of the PM10 NAAQS; 

WHEREAS, during the 30-day public comment period, the District modified the text of 

the publicly-available draft Maintenance Plan/Redesignation Request, including portions 

devoted to transportation conformity budgets; 

WHEREAS, the District submitted the Maintenance Plan/Redesignation Request to ARB 

as a revision to the SIP on May 22, 2014, in accordance with State and federal law; 

WHEREAS, ARB is providing a 30-day public comment period for the modified text 

related to the transportation conformity budgets; 

WHEREAS, on August 18, 2014, ARB staff circulated for public review the proposed 

Maintenance Plan/Redesignation Request; 

WHEREAS, the California Environmental Quality Act requires that no project which may 

have significant adverse environmental impacts be adopted as originally proposed if 

feasible alternatives or mitigation measures are available to reduce or eliminate such 

impacts; 
Resolution 14-27 4 

WHEREAS, the Maintenance Plan/Redesignation Request contains already adopted 

regulations and rules that were subject to environmental review at the time of their 

adoption, and any measure that may be developed or amended as a contingency 

provision will undergo environmental review at the time of adoption; 

WHEREAS, the Board finds that: 

1. California's air pollution control programs have successfully reduced PM10 

ambient concentrations leading to PM10 NAAQS attainment in Mammoth Lakes; 

2. The Maintenance Plan/Redesignation Request complies with the requirements of 

section 1 07(d)(3)(E) of the Act; 

3. The Maintenance Plan/Redesignation Request is necessary for U.S. EPA to 

redesignate Mammoth Lakes to attainment for the PM10 NAAQS; 

4. The Maintenance Plan/Redesignation Request addresses current attainment and 

continued maintenance of the 24-hour PM10 NAAQS through 2030; 

5. The Maintenance Plan/Redesignation Request includes an attainment emission 

inventory; commitments by the District to continue operating the PM10 monitoring 

network; and a process to verify continued PM10 attainment; 

6. The Maintenance Plan/Redesignation Request includes contingency provisions 

to assure prompt correction of any post-redesignation violation of the PM10 

NAAQS; 

7. The Maintenance Plan/Redesignation Request has identified PM10 emission 

budgets for transportation conformity for 2012 and 2030 based on current 

emissions and activity data, and the budgets are adequate to ensure continued 

maintenance of the PM10 NAAQS; 

8. The Maintenance Plan/Redesignation Request relies entirely on adopted 

regulations to demonstrate continued maintenance; and 

WHEREAS, the Board further finds that ARB staff has reviewed and considered the 

Maintenance Plan/Redesignation Request along with the comments presented by 

interested parties and that ARB staff finds that the Maintenance Plan/Redesignation 

Request meets the requirements of the Act. 

NOW, THEREFORE BE IT RESOLVED that the Board hereby adopts the Maintenance 

Plan/Redesignation Request as a revision to the California SIP. 

BE IT FURTHER RESOLVED that the Board directs the Executive Officer to submit the 

Maintenance Plan/Redesignation Request together with the appropriate supporting 

documentation, to U.S. EPA for approval as a revision to the California SIP. 
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BE IT FURTHER RESOLVED that the Board directs the Executive Officer to work with 

the District and U.S. EPA and take appropriate action to resolve any completeness or 

approvability issues that may arise regarding the SIP submission. 

BE IT FURTHER RESOLVED that the Board authorizes the Executive Officer to include 

in the SIP submittal any technical corrections, clarifications, or additions that may be 

necessary to secure U.S. EPA approval. 

BE IT FURTHER RESOLVED that the Board hereby certifies pursuant to 40 CFR 

section 51.102 that the Maintenance Plan/Redesignation Request was adopted after 

notice and public hearing as required by 40 CFR section 51.102. 

I hereby certify that the above is a true 

and correct copy of Resolution 14-27 as 

adopted by the Air Resources Board. 

Tracy Jensen, Elek of the Board