Pinal County 

PM10 and PM2.

Nonattainment Ar

University of Arizona 

Maricopa Agriculture Extension

February 9, 2012
Welcome and Introduction
National Ambient A

Quality Standards 
Federal Clean Air Act Requirem

National Ambient Air Quality Standards (NAAQ

Protect public health (primary)Protect public welfare (secondary) including

• Protection against visibility impairment• Animals • Crops and vegetation • Buildings• Transportation hazards 

Monitor ambient air qualityViolating standards triggers nonattainmentGovernor recommends nonattainment area boundaries; EPA establishes later by rulePM2.5 plan deadline – 36 months after designaPM10 plan deadline – 18 months after redesign
150 micrograms/cubic meter (μg/m

3) 24-hour 

No more than 3 exceedances in 3 yearsNonattainment redesignation based on 2006-2certified monitoring dataDust storm readings don’t count if EPA concurexceptional and natural events findingsTwo types of monitors

Continuous provides hourly data 24/7Filter-based monitors usually once every 6th day

1987 24-hour PM10 NAAQ
PM2.5 NAAQS

2006 24-hour Average Standard 

Violating the standard based on 2006-2008 monitorbut attaining based on more recent data 35 μg/m33-year average of 98th percentile values is less than 

to 35 μg/m

1997 Annual Average Standard

Not violating 15 μg/m33-year average of annual mean concentrations
Pinal County PM10 a

PM2.5 Monitoring Da
Public Health 

vs. 

Public Safety
Blowing Dust Related Accide

ADEQ’s mission is to protect and enhance public health, welfare and environment in Arizona The Governor has directed the ArizDepartment of Transportation, the Department of Public Safety, and tArizona State Land Department to review public safety hazards posed blowing dust in Pinal County 
Adverse effects on breathing and respiratory sdamage to lung tissue, cancer, and premature Protection of at-risk populations: children, eldpeople with lung and heart disease, influenza, asthma1 in 13 school-aged children has asthma per EProtection of healthy people active outdoorsPM10 can also damage buildings, equipment, p

and animals, and reduce visibility

Health and Safety Impacts of 
Health and Safety Impacts of P

Premature death from heart or lung diseaseFine particles aggravate heart and lung diseaseffects such as cardiovascular symptoms, cardarrhythmias, heart attacks, respiratory symptoasthma attacks, and bronchitisCan result in increased hospital admissions, emergency room visits, absences from school work, and restricted activity daysParticularly sensitive: people with heart or lung disease, older adults, and children 
“Severe Crosswinds” or “Blowing Sand Soil Dirt” Weather Related 

East Bound Interstate 10 

2001-2010

Source: Arizona Department of Transportation. Law enforcement responders determined the caus

Number of Crashes grouped by 10-mile segment of I-10 (MP 0.00 - 391.26)
“Severe Crosswinds” or “Blowing Sand Soil Dirt” Weather Related C

West Bound Interstate 10 

2001-2010

Source: Arizona Department of Transportation. Law enforcement responders determined the ca

Number of Crashes grouped by 10-mile segment of I-10 (MP 0.00 - 391.26)
Source: Arizona Department of Transportation 
PM10 and PM2.5 Plann

Area Boundaries
PM2.5 Nonattainment Area

2006-2008 Cowtown monitor violated both the Annual ahour PM2.5 standardsEPA determined Annual PM2.5 monitoring data collected 

2008 at the violating monitor ineligible for comparison tAnnual PM2.5 standards

Unclassifiable/attainment for the Annual PM2.5 Standard3/7/11 EPA designated a portion of the County as nonattainment for the 24-hour PM2.5 standard. 3/7/14 deadline to submit a SIP to EPAEPA may issue a Finding of Attainment and Clean Data Ffor the 24-hour PM2.5 standard based on monitoring data 

2009-2011 to suspend requirements for: 

Attainment modeling demonstrationReasonable Further Progress demonstration Nonattainment area contingency measures
Pinal County PM2.5 Nonattainment Area Bounda
PM10 Nonattainment Area Bound

2006-2008 five air quality monitors violated the PM10 NA

Pinal County 

EPA’s formal redesignation for PM10 is pending and expe

be published in the Federal Register by early spring

The final boundaries are expected to be similar to those proposed earlier by EPA 

State Implementation (SIP) Development Pr
SIP Requirements

Include:

Emissions inventories before and after contCreditable and enforceable control measure

• Implementation and maintenance schedules

Modeling to demonstrate emissions reductiofrom control measures will result in meeting milestones and attainment of the NAAQSContingency measures to be implemented inonattainment area fails to attain the NAAQ
More SIP Requirements

Exceptional event technical demonstrations winds, wildfires)Emissions from transportation related projeconform with air quality plans Reasonable Further Progress, unless SIP demonstrates attainment within five years athe date of designation
Agency Roles

ADEQ – Facilitates communication among agencies and stakeholder groups; convenes stakeholder meetings; draftSIPs

•Contractor – Evaluates all emissions sources; develops bo

up emissions inventories for PM10 and PM2.5 for stakeholder 

review; executes modeling to demonstrate reasonable furtheprogress and attainment milestones will be met

ADOT – Assists with the development of the Motor VehiclEmissions Budget and Transportation Conformity analysis; provides traffic counts for a variety of road typesCAAG – Assists ADOT with transportation planning activiti

Gila and Pinal Counties; develops population projections
Agency Roles Continued

PCAQCD – Develops and enforces air quality rules and measures; operates monitoring network and ensures monitoring data meets CAA requirements; maintains recand drafts demonstrations for exceptional eventsAgBMP Committee – develops Agricultural Best ManagPractices for PM10 areas designated as nonattainment af

6/1/2009; preempts further regulation of agricultural activby county, city, town; recently adopted rules will apply to nonattainment areaEPA – Provides SIP guidance as needed; reviews excepevent demonstrations; courtesy reviews draft SIP; completeness finding within 6 months of SIP submittal anon SIP within 18 months
The Role of Stakeholders

AgBMP Committee and irrigation districtsState, city, town, and county officialsBuilders and contractorsOff-road enthusiastsPermitted emissions sourcesPrivate land owners and public land managersTribesPublic health advocatesEnvironmental organizationsPrivate citizens

State and County agencies will collaborate with staketo develop control measures for the SIPs. Among the 

stakeholder groups will be: 
Process Steps

Technical workgroup works with contractor 

Regular meetings

Stakeholders

Periodic meetings 

Select control strategy

Model alternative control measuresPermanent and legally enforceable 
Draft SIP 

EPA reviews for approvability issues

Public comment periodPublic hearing SIP submittal demonstrating RACMSIP implementationImplementation trackingAttain standards!

Process Steps Continued
SIP Timelines

ADEQ must submit its PM2.5 SIP by March 201ADEQ would like to submit the PM2.5 and PM10 

concurrently

If redesignation for PM10 occurs in March 2012

PM10 SIP will be due by October 2013
Questions and Answers
Additional Information:

ADEQ Web site:

www.azdeq.gov/environ/air/plan/p

pinal.html

Pinal County AQCD Web site

http://pinalcountyaz.gov/Departments/AirQ

ges/Home.aspx
Address All Comments to:

James WagnerArizona Department of Environmental QuaAir Quality Planning Section1110 W. Washington StreetPhoenix, AZ 85007JW3@azdeq.gov602-771-2388 or 1-800-234-5677 then 771-2388