ST. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION IX 75 Hawthorne Street San Francisco, CA 95105-3901

OFFICE OF THE 

## MAY 2 2 2014
MarkA. Macarro Chairman Pechanga Band ofLuiseno Indians Post Office Box 1477 Temecula, Califbmia 

### 92593 Dear Chairman Macarro: The purpose ofthis letteris to provide you with information concerning the U.S. Environmental Protection Agency’s (EPA) designations process forthe 2012 primary annual PM 2

. 5 national ambient air quality standard (NAAQS). yourTribe may find it important to engage with us in the process of assigning designations tbr Indian country. Although yourinvolvement is notrequired, we would like to invite you to participate in the desianalions process andto offeryou consultation. We wantto ensure transparent and effective communication in developing area designations forthe revised PM 2

. 5 NAAQS. On December 13, 2012. EPA revised the PM 25 NAAQS to increase protection ofpublic health from fine particle pollution. The annual PM 2

. 5 standard was strengthened from 15 ug/m 3 to 12 ug/m 3

. Establishing initial area designations is akey step in the process ofproviding the health and/orwelfare protection intendedbythe Clean AirAct (CAA). Within two years ofpromulgation ofanew orrevisedNAAQS. EPA must list and designate all areas in the country as either: Attainment

- areas thatmeetthe standard; Nonattainment

- areas that either do not meet the standard, or are contributing to a nearby area that does notmeetthe standard; or Unclassifiable

- areas where there is insufficient infonnation to make a determination as to attainment. These designations are based on current air quality information, recommendations from state governors andtribal leaders, and otherrelevant information as discussed in the April 2013 designations guidance, 

### initialArea Des

### ignationsforthe 2012 RevisedPriinaiyAnnual Fine ParticleNationalAmbientAir QuaiTh’ 

### Standard. The guidance is available on the EPA’s PM Designations website at Ho\ ‘ppldLsien Wor’ )12t. 1fl1cH doLs/apiil2O1 euiduc pdl Additional information about developing tribal air quality designations is available in the September2013 document, 

### DevelopingDesignation Recommendations fOrAreas ofIndian Country, which is available here: 

### bui ________________________________________________ ________________________________________________________________________________

We are sending you this letterbecause yourTribe has Treatmentin the Same Manner as a State (TAS) status for designation provisions ofthe CAA andwe received arecommendation ofunclassifiable for your area. We will keep you informed as we finalize designations for yourTribe’s area and invite and encourage you to participate. Please notify us byJune 13, 2014 ifyou are interested in consulting with Pruited on Reeve/ed Pupelus regarding a recommended designation. When requested, consultation will be conducted in accordance with the EPA Policy on Consultation and Coordination with Indian Tribes (w \\ .epa. oV/nibll/conSuftatiOfl/cOflSulflliey.ln1fl. We plan to fi)rmally announce our intended designations for all areas by August 14, 2014. At that time we will send another letter to you with our intended designation and offer an additional opportunity to consult with us on any modifications EPA proposes make to your Tribe’s recommendation. In accordance with section 107(d)(1)(B) of the CAA, we are required to issue final designations for the PM 2 . 5 NAAQS no later than December 12, 2014. Our designations will be based on the most recent three calendar years of certified, quality-assured monitoring data available, and any other relevant infbrmation. As the designation process moves forward, we will keep you informed of any additional guidance or other support activities. We look forward to working with you to develop area designations under the PM 2 . 5 NAAQS in a timely manner. If your Tribe is interested in consultation or has questions about the designations process, please do not hesitate to contact me or Kerry Drake, Associate Director, Air Division, of my staff at 415-947-4157 or drake.kcrry(aepi.ao. Sincerely, Enclosure cc: David Newman, Acting Environmental Director

### 2012 PM 2 • 5 

### NAAQS Tribal Designations Schedule
Action Date Recommendations forthe PM 25 NAAQS due December 13, 2013 to EPA (original deadline). Advance consultation opportunity offeredto Late May 2014 (uponreceipt ofletter) tribal leaders. Deadline to request advancetribal consultation. June 13, 2014 Optional tribal recommendations forthe PM 2

. 5 June 13, 2014 NAAQS due to EPA (extended deadline). Advance tribal consultation takes place. June

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### July, 2014 EPA announces intended designations, August 14, 2014 additional consultation opportunity offeredto tribal leaders. Additional consultationtakes place. September

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### October, 2014 EPA issues final PM 75 designations. December 12, 2014