FINAL

Publication Date: September 2015

2014 AIR MONITORING
NETWORK PLAN

Author: Ceresa Stewart,
Data Processing and Analysis Coordinator

ACKNOWLEDGEMENTS
In 2014, the Maricopa County Air Quality Department’s Air Monitoring Division maintained 25
ambient air monitoring sites throughout Maricopa County. The division has eighteen team members
including: one manager, two technician supervisors, two engineers, one quality assurance officer, one
data analyst, and eleven technicians.
The division would especially like to thank all of its personnel and the department’s atmospheric
scientist for their excellent job in helping to maintain Maricopa County’s air monitoring program.
They are: Ben Davis, Gary Ensminger, Robert Dyer, Ceresa Stewart, Nikki Peterson, Casey Bryan,
John Neff, Tom Shorb, Chris Hernandez, Hugh Tom, Steve Sample, Daniel Daniels, Robert Sawicki,
Reynaldo Santillano, Larry Seals, Alex Herrera, Freddie Alejandro, Tom Dubishar, David Dubiel, and
Ron Pope, respectfully.
In addition, the department gratefully acknowledges the assistance of other agencies, which provided
data and helpful comments to this review. These include: the Arizona Department of Environmental
Quality, Pinal County Air Quality Control District, the Maricopa Association of Governments, and the
Tribal air monitoring organizations adjacent to Maricopa County.
Last, we would like to thank the United States Environmental Protection Agency’s Region 9 personnel
for their guidance and support regarding our air monitoring program. The department respectfully
submits this 2014 Air Monitoring Network Plan to Region 9 for review.

2014 Maricopa County Air Monitoring Team

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Table of Contents
ACKNOWLEDGEMENTS ................................................................................................................... 2
KEY TO ACRONYMS AND TERMS ................................................................................................. 7
ABSTRACT........................................................................................................................................... 12
INTRODUCTION TO THE AIR MONITORING NETWORK PLAN ......................................... 13
Overview of the Clean Air Act and Criteria Pollutants ................................................................... 15
The National Ambient Air Quality Standards.................................................................................. 16
The Air Quality Index ...................................................................................................................... 17
Information Regarding the Causes, Characteristics, and Compliance of Criteria Pollutants .......... 19
AIR MONITORING STRATEGIES AND SURVEILLANCE SYSTEM DESIGN...................... 30
Overview of the Criteria Pollutant Networks .................................................................................. 30
Overview of the Air Monitoring Sites ............................................................................................. 34
2014 SUMMARY OF NETWORK RESULTS AND REQUIRED INFORMATION ................... 38
Determining Data Quality and Acceptability................................................................................... 38
Summary of Data Produced by the Criteria Pollutant Networks ..................................................... 40
2014 NAAQS Exceedance and Violation Summary ....................................................................... 58
2014 O3 Exceedance and Violation Information ............................................................................. 59
2014 Particulate Matter Exceedance and Violation Status .............................................................. 61
Supplemental Exceptional Event Information ................................................................................. 65
Changes to the Criteria Pollutant Air Monitoring Networks ........................................................... 65
Daily Uses of Criteria Pollutant Data .............................................................................................. 69
Information Regarding Maricopa County’s Supplementary Air Monitoring Programs .................. 70
Information Regarding Additional Air Monitoring within Maricopa County ................................. 73
REFERENCES ..................................................................................................................................... 74
APPENDIX I –2014 AIR MONITORING DATA BY SITE ............................................................ 75
BLUE POINT (BP) (04-013-9702) ......................................................................................................... 76
BUCKEYE (BE) (04-013-4011) ............................................................................................................. 77
CAVE CREEK (CC) (04-013-4008) ....................................................................................................... 78
CENTRAL PHOENIX (CP) (04-013-3002) .............................................................................................. 79
DEER VALLEY (DV) (04-013-4018) ..................................................................................................... 80
DIABLO (DI) (04-013-4019)................................................................................................................. 81
DURANGO COMPLEX (DC) (04-013-9812) ........................................................................................... 82
DYSART (DY) (04-013-4010) .............................................................................................................. 83
FALCON FIELD (FF) (04-013-1010)...................................................................................................... 84
FOUNTAIN HILLS (FH) (04-013-9704) ................................................................................................. 85
GLENDALE (GL) (04-013-2001)........................................................................................................... 86
GREENWOOD (GR) (04-013-3010) ....................................................................................................... 87
HIGLEY (HI) (04-013-4006) ................................................................................................................. 88
HUMBOLDT MOUNTAIN (HM) (04-013-9508) ...................................................................................... 89
MESA (ME) (04-013-1003) .................................................................................................................. 90
NORTH PHOENIX (NP) (04-013-1004) .................................................................................................. 91
PINNACLE PEAK (PP) (04-013-2005) ................................................................................................... 92
RIO VERDE (RV) (04-013-9706) .......................................................................................................... 93
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SOUTH PHOENIX (SP) (04-013-4003) ................................................................................................... 94
SOUTH SCOTTSDALE (SS) (04-013-3003) ............................................................................................ 95
TEMPE (TE) (04-013-4005).................................................................................................................. 96
WEST CHANDLER (WC) (04-013-4004) ............................................................................................... 97
WEST 43RD AVENUE (WF) (04-013-4009) ............................................................................................ 98
WEST PHOENIX (WP) (04-013-0019) ................................................................................................... 99
ZUNI HILLS (ZH) (04-013-4016) ........................................................................................................ 100
APPENDIX II - EPA-REQUIRED SITE METADATA ................................................................. 101
Required General Statement Regarding Changes to the PM2.5 Network ....................................... 102
Appendix II Site Schematic Descriptions ...................................................................................... 102
APPENDIX III - PUBLIC NOTICE AND COMMENT INFORMATION.................................. 133
Public Notice Period ...................................................................................................................... 134
Public Comments Received ........................................................................................................... 136
Response to Public Comments ....................................................................................................... 139
Public Meeting Attendance ............................................................................................................ 139

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List of Tables
Table 1. National Ambient Air Quality Standards ................................................................................. 16
Table 2. The Air Quality Index............................................................................................................... 17
Table 3. Site Monitoring Types .............................................................................................................. 31
Table 4. Spatial Scales of Representativeness ........................................................................................ 32
Table 5. Maricopa County Ambient Air Monitoring Sites for 2014 ...................................................... 35
Table 6. Location of Air Monitoring Sites ............................................................................................. 36
Table 7. Air Monitoring Instruments by Site.......................................................................................... 37
Table 8. 2014 Criteria Pollutant Data Completeness for SLAMS.......................................................... 38
Table 9. 2014 Total Amount of Data Produced ...................................................................................... 39
Table 10. 2014 8-hour Average CO Data Summary .............................................................................. 41
Table 11. CO Data Required by EPA ..................................................................................................... 41
Table 12. 2014 Pb Data Summary .......................................................................................................... 43
Table 13. Pb Data Required by EPA ...................................................................................................... 43
Table 14. 2014 NO2 1-hour Data Summary ........................................................................................... 45
Table 15. NO2 Data Required by EPA ................................................................................................... 45
Table 16. 2014 8-hour Average O3 Data Summary................................................................................ 47
Table 17. O3 Data Required by EPA ...................................................................................................... 47
Table 18. 2014 PM10 24-Hour Data Summary ....................................................................................... 49
Table 19. PM10 Data Required by EPA .................................................................................................. 50
Table 20. 2014 PM2.5 3-Year 24-Hour and Annual Mean Averages for the FRM Sampler .................. 52
Table 21. 2014 PM2.5 3-Year 24-Hour Averages and Annual Means for FEM Analyzers .................... 52
Table 22. PM2.5 FRM Sampler 3-Year Annual Averages ...................................................................... 53
Table 23. PM2.5 FEM Analyzer 3-Year Annual Averages ..................................................................... 53
Table 24. PM2.5 3-Year 24-Hour Averages of the 98th Percentile for FRM Sampler............................. 54
Table 25. PM2.5 3-Year 24-Hour Averages of the 98th Percentile for FEM Analyzers .......................... 54
Table 26. PM2.5 Data Required by EPA ................................................................................................. 55
Table 27. 2014 SO2 Data Summary........................................................................................................ 57
Table 28. SO2 Data Required by EPA .................................................................................................... 57
Table 29. 2014 NAAQS Exceedances and Violation Summary ............................................................ 58
Table 30. 2014 O3 8-hour Average Exceedance Details ........................................................................ 59
Table 31. 2014 O3 NAAQS Violations................................................................................................... 60
Table 32. 2014 PM10 24-hour NAAQS Exceedances ............................................................................. 61
Table 33. 2014 Violations of the PM10 24-hour NAAQS ...................................................................... 62
Table 34. 2014 Violations of the PM10 NAAQS with All EE Data Excluded, ...................................... 63
Table 35. 2014 PM2.5 Exceedances ........................................................................................................ 64
Table 36. Seasonal Monitors .................................................................................................................. 69

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List of Figures
Figure 1. Air Monitoring Site Map ......................................................................................................... 14
Figure 2. AIRNow AQI Forecast Map ................................................................................................... 18
Figure 3. Maricopa County’s AQI Map ................................................................................................. 18
Figure 4. 2014 Air Monitoring Sites....................................................................................................... 34
Figure 5. 2014 CO Monitoring Sites ...................................................................................................... 40
Figure 6. 2014 Pb Monitoring Sites ........................................................................................................ 42
Figure 7. 2014 NO2 Monitoring Sites ..................................................................................................... 44
Figure 8. 2014 O3 Monitoring Sites ........................................................................................................ 46
Figure 9. 2014 PM10 Monitoring Sites ................................................................................................... 48
Figure 10. 2014 PM2.5 Monitoring Sites ................................................................................................. 51
Figure 11. 2014 SO2 Monitoring Sites ................................................................................................... 56
Figure 12. Aerial View of Near-road Site #2 ......................................................................................... 67
Figure 13. Street View of Near-road Site #2 .......................................................................................... 68
Figure 14. 2014 Mulch Fire .................................................................................................................... 70

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KEY TO ACRONYMS AND TERMS
98th percentile

The 98th percentile is defined in 40 CFR Part 50 Appendix N as “the smallest
daily value out of a year of PM2.5 mass monitoring data below which no more
than 98 percent of all daily values fall using the ranking and selection method
specified in section 4.5(a) of this appendix”.

ADEQ:

Arizona Department of Environmental Quality

ADT:

Average Daily Traffic count

aka:

Also known as

AMD:

Air Monitoring Division

AMNP:

Air Monitoring Network Plan. The plan provides information regarding the
establishment and maintenance of the County’s air quality surveillance system that
consists of a network of SLAMS monitoring stations and SPM monitoring stations.

Analyzer:

A monitor that samples the air and produces near real-time data without collecting a
sample that must be analyzed.

ANSI:

American National Standards Institute

AQI:

Air Quality Index. An index that applies to each criteria pollutant and shows the
concentration of each pollutant relative to its respective standard. When the AQI
reaches 101, the pollutant’s concentration has exceeded the NAAQS.

AQS:

The Air Quality System, sometimes defined as the Air Quality Subsystem. The U.S.
EPA’s ambient air database.

ASQ:

American Society for Quality

Attainment:

This refers to an area being in compliance with a NAAQS and the U.S. Clean Air Act.
After several years of no violations of a NAAQS, the EPA can classify a geographic
area as in attainment for a particular CP.

AWT:

Average Weekday Traffic count

BAM:

Beta Attenuation Monitor. A continuous particulate measuring instrument used
previously by MCAQD to measure PM10.

CAA:

Clean Air Act

CASAC:

Clean Air Scientific Advisory Committee

CBSA:

Core-Based Statistical Area – is defined by the U.S. Office of Management and
Budget as a statistical geographic entity consisting of the county or counties associated
with at least one urbanized area/urban cluster of at least 10,000 in population, plus
adjacent counties having a high degree of social and economic integration.

CFR:

The Code of Federal Regulations are published annually and contain the codification
of the general and permanent rules published in the Federal Register by the executive
departments and agencies of the Federal Government. An eCFR is a free electronic
version; however, it is not the legal version.

Class I:

Federally designated parks or wilderness areas with mandated visibility protection.

CP:

Criteria pollutant, or the Central Phoenix site, depending upon context

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CO:

Carbon monoxide, a criteria pollutant

Collocated:

The practice of establishing a second pollutant monitor within a specified distance and
of a specified type at a monitoring site for QA purposes.

Continuous monitor:

A method of monitoring air pollutants that is continually measuring the quantity of the
pollutant, either gaseous or particulate. Continuous monitors are analyzers that can
obtain real-time or short-term averages of pollutants. Continuous monitors may also
be referred to as “automated” monitors.

Criteria Pollutants:

Six pollutants (CO, O3, NO2, Pb, PM, and SO2) that have NAAQS established by the
U.S. EPA.

CSA:

Combined Statistical Area - is defined by the U.S. Office of Management and Budget
as when very large cities combine two or more CBSAs, these larger areas are referred
to as combined statistical areas

CSN:

The chemical speciation network. A nationwide, research air monitoring network
designed to ferret-out the chemical constitutes of PM2.5 and to discern trends in PM2.5
pollution. This program is managed by the U.S. EPA Office of Air Quality Planning
and Standards (OAQPS).

Delta T:

Difference between two levels of temperature measurements. Delta T is measured in
the MCAQD network at heights of 2 and 10 meters. A higher temperature at the upper
level indicates a temperature inversion.

Design Value:

A design value is a statistic that describes the air quality status of a given area relative
to the level of the NAAQS. For a concentration-based standard, the air quality design
value is simply the standard-related test statistic. The design value of a pollutant
monitoring network is the highest sample value in the network used to compare to the
NAAQS; i.e., the 24-hour PM2.5 design value for the network is the monitor with the
highest 3-year average of the 98th percentile.

EBAM:

E-Beta Attenuation Monitor is a rugged, portable, battery or solar-operated analyzer
that is suitable for obtaining and reporting continuous measurements of particulate
matter in remote locations. EBAMs are often equipped with wind speed and direction
instrumentation as well. EBAMs are particularly useful for temporary measurements
of PM related to an event.

EPA R9:

Environmental Protection Agency Region 9

EE:

Exceptional Event – a high CP pollution event that is considered to be uncontrollable
and caused by natural sources of pollution or an event that is not expected to recur at a
given location. An EE can apply to any CP, but historical in Maricopa County, almost
all EEs are related to high PM10 events.

Event:

Generally refers to a high pollution day where a NAAQS was exceeded

Exceedance:

Generally refers to a high pollution day where a NAAQS was exceeded

FDMS-TEOM:

Filter Dynamics Measurement System-Tapered Element Oscillating Microbalance. A
continuous particulate analyzer used by MCAQD to measure PM2.5.

FEM:

Federal Equivalency Method. An EPA-approved method of sampling and analyzing
the ambient air for an air pollutant, i.e., includes the monitor and its operating
firmware and procedure(s). An FEM must pass required testing found in 40 CFR Part
53 and show CP data produced are similar to the Federal Reference Method (FRM).
Continuous particulate matter and some gaseous analyzers are FEMs.

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Filter-based sampler:

A method of monitoring particulate pollution that involves exposing a pre-weighed
filter to a specific flow rate for a prescribed period of time, usually midnight to
midnight, or 1440 minutes. The filters are then post-weighed to determine the mass of
particulates per volume, e.g. µg/m3.

FRM:

Federal Reference Method. An EPA-approved method of sampling and analyzing the
ambient air for an air pollutant, i.e., includes the monitor and its operating firmware
and procedure(s). An FRM must pass required testing found in 40 CFR Part 53 and
show CP data produced are accurate based on acceptable precision and bias limits.
These methods are the baseline that all other methods reference, e.g. Federal
Equivalency Methods (FEM).

HAPs:

Hazardous air pollutants. An airborne chemical that has been listed in the federal
Clean Air Act and has an associated standard or process requirement determined for it.

MAG:

Maricopa Association of Governments

MCAQCED:

Maricopa County Air Quality Compliance and Enforcement Division

MCAQD:

Maricopa County Air Quality Department

MO:

monitoring organization

Monitor:

Monitor is a term that refers to an instrument, sampler, analyzer, or other device that
measures or assists in the measurement of atmospheric air pollutants and which is
acceptable for use in ambient air surveillance under the applicable provisions of 40
CFR Part 58 Appendix C.

µg/m3:

micrograms per cubic meter

µm:

micrometers

MSA:

Metropolitan Statistical Area is designated by the U.S. Office of Management and
Budget as a geographical area based on the concept of a core area with a large
population nucleus, plus adjacent communities having a high degree of economic and
social integration within that core. Metropolitan and micropolitan statistical areas are
the two categories of CBSAs. Metropolitan areas have populations greater than
50,000, and micropolitan areas have populations between 10,000 and 50,000. The
AMD operates air monitoring stations within the Phoenix-Mesa MSA, which includes
portions of Maricopa and Pinal County.

NAAQS:

National Ambient Air Quality Standards. Health and welfare-based standards
established by the U.S. EPA that set permissible airborne concentration limits for the
CPs.

NATTS:

National Air Toxics Trend Stations. A nationwide research air monitoring program
designed to measure toxic air pollutant trends. This program is managed by the U.S.
EPA Office of Air Quality Planning and Standards (OAQPS).

NCORE:

National Core multi-pollutant site. A national network of multi-pollutant monitoring
sites used to represent the nation as a whole. There are currently ~75 NCORE sites (13 per state plus Washington D.C., Virgin Islands, and Puerto Rico) located in both
urban and rural areas. This program is managed by the U.S. EPA Office of Air
Quality Planning and Standards (OAQPS).

Network:

All stations of a given type or types

NO2:

Nitrogen dioxide. The indicator compound used to gauge the ambient concentration of
NOx.

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NOX:

Nitrogen oxide(s), a criteria pollutant. The sum of nitric oxide (NO), NO2, and other
nitrogen-containing compounds.

Nonattainment:

This refers to being an area not being in compliance with a NAAQS and the U.S.
Clean Air Act. After several years of violating a NAAQS, the EPA can classify a
geographic area as being in nonattainment for a particular CP.

O3:

Ozone, a criteria pollutant

OAQPS:

The U.S. EPA Office of Air Quality Planning and Standards located in Research
Triangle Park, N.C., which serves as EPA “Headquarters” for ambient air monitoring
guidance and the NAAQS reviews.

PAMS:

Photochemical Ambient Monitoring Stations. A nationwide research air monitoring
program designed to measure specific airborne chemicals that are known to be
“precursor pollutants” that form ozone when combined with ultraviolet light and heat.
This program is managed by the U.S. EPA Office of Air Quality Planning and
Standards (OAQPS).

PCAQCD:

Pinal County Air Quality Control District

Pb:

Lead, a criteria pollutant

PM:

Particulate matter, also known as “particulates”, project manager, or preventative
maintenance depending on context

PM2.5:

Particulate matter 2.5 micrometers in aerometric diameter or smaller, a criteria
pollutant. PM2.5 is also referred to as “fine” particulate matter.

PM10:

Particulate matter 10 micrometers in aerometric diameter or smaller, a criteria
pollutant

PM10-2.5 and/or PMc:

“Coarse” particulate matter is less than 10 micrometers, but recently, has come to
mean PM10 minus PM2.5, not currently regulated as a lone a criteria pollutant.

ppb:

parts per billion

ppm:

parts per million

PQAO:

Primary quality assurance organization - a monitoring organization (MO) or other
organization that is responsible for a set of air monitoring stations that monitor the
same pollutant and for which data quality assessments can be pooled. Each criteria
pollutant sampler/monitor at a monitoring station in the SLAMS and SPM networks
must be associated with one, and only one, primary quality assurance organization.

Primary Standard:

The portion of the NAAQS designed to protect public health.

QA:

Quality assurance – generally refers to the administrative or managerial processes in
place to verify that quality control activities are successfully carried out by personnel
and that data produced meet specified quality requirements prior to use, i.e., written
guidance documents, program oversight activities, etc.

QC:

Quality control – generally refers to the technical activities in place to produce high
quality data, i.e., air monitoring instruments operate within specified criteria, data
collection from sites, etc.

Quality System:

The overall system of technical activities that measure the attributes and performance
of a process, item, or service against defined standards to verify that they meet the
stated requirements established by the customer. (see ANSI/ASQ E4-2004)

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RRNS:

Rapid Response Notification System - a communication tool used by MCAQD to
manage high pollution events by alerting residents, intergovernmental personnel, and
stakeholders of increasing PM concentrations.

Sampler:

A monitor that collects a physical sample for analysis.

Secondary Standard:

The portion of the NAAQS designed to protect public welfare and the environment.

SIP:

State Implementation Plan. SIPs are a collection of state and local regulations and
plans to achieve healthy air quality under the Clean Air Act.

Site:

A site is a geographic location. One or more air monitoring stations may be located at
a site.

SLAMS:

State and Local Air Monitoring Station. The SLAMS consist of a network of
approximately 5,000 monitoring stations nationwide whose size and distribution is
largely determined by the needs of State and local air pollution control agencies to
meet their respective State implementation plan (SIP) requirements. Other types of
monitoring stations include: NCORE (national core) and SPM (special purpose).
Currently, AMD does not operate an NCORE station, and we only operate one SPM
site.

SO2:

Sulfur dioxide, a criteria pollutant

SPM:

Special Purpose Monitor. A special purpose monitor provides data for special studies
needed by the State and local agencies to support SIPs and other air program activities.
The SPMs are not permanently established as part of a particular pollutant’s
monitoring station(s); their location can be adjusted easily to accommodate changing
needs and priorities.

SSI:

Size Selective Inlet. The inlet used on high- and low volume particulate samplers and
analyzers to determine the size of particles sampled or measured by the monitor. The
particle size separation process usually employs impaction, filtration, or cyclonic flow.
A station may comprise a single CP monitor, or a group of monitors with a shared
objective, located at a particular site.

Station:
TEOM:

Tapered Element Oscillating Microbalance. A continuous FEM PM analyzer used by
MCAQD to measure PM10 and/or PM2.5 concentrations, depending upon the
instrument model and sample inlet configuration.

tpy:

tons per year

UATMP:

Urban Air Toxics Monitoring Program. A nationwide research air monitoring
program designed to measure toxic air pollutants within urban areas. This program is
managed by the U.S. EPA Office of Air Quality Planning and Standards (OAQPS).

U.S. EPA:

United States Environmental Protection Agency

VOC:

Volatile organic compound. VOCs are chemical compounds that can easily vaporize
and enter the atmosphere. There are many natural and artificial sources of VOCs;
solvents and gasoline make up some of the largest artificial sources. VOCs will react
with NOx in the presence of sunlight to create ground-level O3 pollution.

Volume:

The amount of air sampled onto a filter or other medium, or into a collection device
such as a canister. Volume is calculated by multiplying the sampler’s flowrate and the
time period sampled, usually in minutes.
The amount of data in a file or database.

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ABSTRACT

In 2014, the Maricopa County Air Quality Department (MCAQD) Air Monitoring Division (AMD)
successfully operated a robust air quality surveillance system that monitored for regulated ambient air
pollutants as per 40 CFR Parts 50 and 58. This plan documents how the system performed during
2014. The data generated by the system are intended for regulatory compliance determinations
regarding regulated ambient air pollutants. Data met EPA’s requirements of quality, which must occur
before data can be used in this capacity. Notable accomplishments included the startup of our first
near-road air monitoring station, which opened in February 2014. Significant advances occurred with
establishing our second near-road monitoring station, which is scheduled to open in 2015.
The plan describes changes that need to be made to monitors, stations, and/or sites. In 2014, we did
not request any waivers from air monitoring regulations, except for air monitoring waivers when
access to a site prevented data collection for an extended period of time. When data collection
interruptions occurred due to temporary or permanent site shutdowns, we made personnel at the
Environmental Protection Agency’s Region 9 (EPA R9) office aware of the situation immediately.
Notably, our Higley site’s location was closed in November 2014 due to the landowner needing use of
their property, which housed the air monitoring station. We requested to suspend monitoring at this
site until a suitable replacement location could be identified and established. We are working to secure
a replacement site as close as possible to the previous geographic location so the same population is
represented. There were no other waivers requested from regulatory requirements or to suspend air
monitoring in 2014.
The department also performed specialized air monitoring projects that included, but were not limited
to: collecting particulate filter samples for chemical speciation over the 2014 Thanksgiving, Christmas
and New Year’s holidays, planning a temporary air monitoring network for the 2015 Superbowl, and
establishing temporary monitoring for emergency events.
Department personnel maintained successful working relationships with regulatory agency
representatives, customers, and stakeholders. We provided our data to personnel from these groups as
requested, and we responded to calls from the public regarding air monitoring questions. In late 2014,
ADEQ decommissioned their gravimetric laboratory, and now, we process and weigh Arizona
Department of Environmental Quality’s (ADEQ) filter samples. Last, we assisted Pinal County Air
Quality Control District (PCAQCD) and the Fort McDowell Yavapai Nation by temporarily loaning
air monitors to them for special projects or to prevent data interruption due to their monitor being nonoperational; however this information is not covered in detail. We continued to enhance our air
monitoring website for the public’s benefit as well.

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INTRODUCTION TO THE AIR MONITORING NETWORK PLAN

Each year, MCAQD produces a comprehensive Air Monitoring Network Plan (AMNP) that provides
vital information regarding the air monitoring surveillance system in place for Maricopa County. The
EPA requires each air monitoring organization (MO) operating within the U.S and its territories to
submit their plan on July 1st following a 30-day public comment period by way of 40 CFR Part 58,
Subpart B §58.10(a)(1). This year’s AMNP was submitted to EPA R9 in September 2015.
The AMNP is preliminary to our annual data certification for EPA R9, and it helps us review and
assess the quality of our data before submitting it for certification. The plan’s secondary purpose is to
inform the public of air pollutants that can potentially affect human health; thereby empowering our
citizens and visitors with the ability to make informed decisions regarding their daily activities and
lifestyles.
The plan describes our air monitoring system, which can be referred to as a conglomeration of six
criteria pollutant (CP) networks, or a single, broad network that includes all 25 monitoring sites. It
includes an abundance of information regarding each CP network’s operation and data findings as well
as brief information regarding special purpose and/or research-driven air monitoring. The plan’s
information includes, but is not limited to:
• Descriptions of air monitoring sites, i.e., site type and objective, spatial scale represented,
geographic coordinates, and Air Quality System (AQS) site identification number;
• Each monitoring station’s EPA classification, operating (sampling) schedule, the monitoring
method in operation, and any laboratory analytical method used for analyzing physical samples
if applicable;
• The population each monitor represents, e.g., Metropolitan Statistical Area (MSA), Core-based
Statistical Area (CBSA), or the Combined Statistical Area (CSA);
• Information showing each monitor’s siting and operating criteria met applicable regulatory
requirements found in 40 CFR Part 58 - Appendices A (quality assurance), C (special purpose
monitors), D (comparability of data to the National Ambient Air Quality Standards), and E
(currently reserved);
• Confirmation that data generated are or are not of suitable quality for comparison to the
NAAQS, i.e., regulations that establish the ambient limit(s) for each CP;
• Required design value criteria, which are metrics used to determine how many monitoring
stations/monitors are required to operate within a CP network;
• Three years of data from each station plus required statistical analyses;
• The NAAQS compliance status of each CP and how MCAQD plans to review and address a
violating monitor;
• Any proposed changes, e.g., additions, relocations, and discontinuations to monitors, stations,
and/or sites within the next 18 months;
• Any proposed changes to the monitoring or analytical methods employed by the County’s
surveillance system;
• Any requests for waivers from specific air monitoring requirements; and
• Public comments received regarding the draft AMNP and MCAQD’s responses to the
comments as requested by EPA R9.

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The MCAQD first produces a draft AMNP and solicits public comments on the draft. Following the
public comment period, the MCAQD amends the draft as needed. Then, the AMNP is sent to EPA R9
for review and approval, or disapproval. The EPA R9 completes the review process within 120 days
of receiving the plan, and the EPA R9 administrator, or their representative, must specifically approve
the requests for network changes and waivers. If the plan is not approved, then the MCAQD addresses
the concerns presented by EPA R9 personnel, and resubmits the revised plan. Once the plan is
approved, MCAQD posts it on our website, and the EPA makes it available to other MOs through the
EPA’s Ambient Monitoring Technology Information Center (AMTIC) website.
The map below shows the location of MCAQD’s air monitoring sites discussed in this year’s plan (see
Figure 1).

Figure 1. Air Monitoring Site Map

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Overview of the Clean Air Act and Criteria Pollutants
Between the years 1900 and 1970, the emission of six principal ambient air pollutants increased
significantly. The principal pollutants, referred to as CPs, occur throughout the U. S. The CPs are:
carbon monoxide (CO), lead (Pb), nitrogen oxides (NOx) with nitrogen dioxide (NO2) used as the
indicator compound, ozone (O3), particulate matter ≤10 micrometers (PM10) and ≤2.5 micrometers
(PM2.5), and sulfur dioxide (SO2). Criteria pollutants are known to cause health problems, property
damage, and harm the environment. These issues led to the Clean Air Act (CAA) being signed into
law in 1970.
The CAA, and its amendments, provides the framework for all pertinent
State/Local/Tribal (S/L/T) organizations to assess and protect air quality through an air monitoring
program. The MCAQD monitors for all six CPs.
The U.S. EPA regulates CPs using the National Ambient Air Quality Standards (NAAQS), which
establish ambient limits for each CP using health-based criteria. One set of limits, called “primary
standards,” are designed to protect public health, while another set called “secondary standards”, are
designed to protect public welfare, i.e., the prevention of damage to property such as farm crops and
buildings, preservation of national parks and monuments, and the protection of wildlife. The U.S.
EPA’s Regional Offices oversee the enforcement of the CAA, and monitoring agencies operating
within Arizona fall under the jurisdiction of EPA R9. The U.S. EPA Office of Air Quality Planning
and Standards (OAQPS) oversees the air monitoring program nationwide and the review of the
NAAQS.
The NAAQS are not static. The CAA requires that they undergo periodic review using the most recent
scientific, health-based information available. Historically, when a NAAQS limit is changed, it is
lowered and becomes more stringent, or “conservative”. Lowering a NAAQS limit occurs when it is
considered necessary to better protect the public’s health and/or welfare. The NAAQS review is a
lengthy process that assesses the science upon which each NAAQS is based as well as the standard
itself. The Clean Air Scientific Advisory Committee (CASAC) provides independent advice to EPA
concerning the need to change a standard. In addition, comments are accepted from health researchers,
air quality professionals, and the public. More information regarding the NAAQS review process is
available at EPA’s website.

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The National Ambient Air Quality Standards
The NAAQS are geared toward improving air quality in geographical areas where the current quality is
unacceptable as well as preventing air quality deterioration in geographical areas where the air is
relatively free of pollution. Table 1 shows a summary of the current primary and secondary standards
for each CP. Because each CP has different health effects and environmental damage potential, the
NAAQS limit(s) are different for each pollutant. Some pollutants have standards for both long-term
and short-term averaging times. The short-term standards are designed to protect against acute health
effects, while the long-term standards are designed to protect against chronic health effects.

Pollutant

Carbon Monoxide

Table 1. National Ambient Air Quality Standards
Primary/
Averaging Time
Level
Secondary
9 ppm

1-hour

35 ppm

Not to be exceeded more than once
per year on avg. over 3 years

primary

primary /
secondary

Lead

8-hour

Rolling 3-month
average

0.15
μg/m3

Not to be exceeded

primary

1-hour

100 ppb

98th percentile of 1-hour daily
maximum concentrations, avg. over 3
years

primary /
secondary

Annual

53 ppb

Annual Mean

primary and
secondary

8-hour

0.075 ppm

3-year avg. of the annual fourth
highest daily max 8-hour avg.

primary

Annual

12 μg/m3

3-year avg. of the annual means

secondary

Annual

15 μg/m3

3-year avg. of the annual means

primary /
secondary

24-hour

35 μg/m3

3-year avg. of the 98th percentiles

primary /
secondary

24-hour

150 μg/m3

Not to be exceeded more than once
per year on average over 3 years

primary

1-hour

75 ppb

99th percentile of 1-hour daily max.,
averaged over 3 years

secondary

3-hour

0.5 ppm

Not to be exceeded more than once per
year

Nitrogen Dioxide

Ozone

Particulate
Matter

PM2.5

PM10

Form

Sulfur Dioxide
Source: Adapted from the table shown on the EPA’s NAAQS webpage.

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The Air Quality Index
To better communicate current CP health risks to the public, EPA developed the Air Quality Index
(AQI), a health risk communication tool that converts CP concentrations into six health-impact related
color-coded indices based upon the NAAQS. The AQI communicates air quality conditions using the
graduated color scheme shown on Table 2. The AQI can be used to provide an overall air quality
value by combining multiple CP concentrations as well as an air quality value for each CP, except
NO2, which is the only CP that does not have an AQI association. The AQI values change throughout
the day based on the current data.
Developing AQIs was furthered over the past few years by continuous analyzers replacing many of
their sampler predecessors; thereby making data available electronically as it is generated. Currently,
many MOs, including MCAQD, provide near real-time CP data to their agency’s website and/or the
EPA’s website. It is worth noting that the AQI and air quality forecasts are based on preliminary data,
i.e., data that have not passed quality assurance (QA) tests. Occasionally, these data may contain some
error.
Having continuous air monitoring data helps air quality professionals gauge current, local air quality
conditions. Air quality forecasters may provide projected AQI values for the next 24 to 48 hours so
the public can better prepare for expected air quality conditions. The public may use the AQI values to
reduce their exposure to air pollution and its associated health effects by modifying their daily
activities.
Table 2. The Air Quality Index
Index

Color
Designation

Air Quality

Health Impact

0 – 50

Green

Good

No harmful effects expected.

51 – 100

Yellow

Moderate

Unusually sensitive people should consider
limiting prolonged outdoor exertion.

101 – 150

Orange

Unhealthy for
Sensitive
Groups

Active children & adults, people with respiratory
disease (e.g., asthma) should limit prolonged
outdoor exertion.

151 – 200

Red

Unhealthy

Everyone should observe caution. Avoid
prolonged outdoor exertion.

201 – 300

Purple

Very Unhealthy

Avoid all outdoor exertion. Use extreme caution
outdoors.

301 – 500

Maroon

Hazardous

Everyone should avoid all outdoor exertion.

Source: 40 CFR Part 58, Appendix G - Uniform Air Quality Index (AQI) and Daily Reporting

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The AQI is used throughout the U.S. and
the EPA AIRNow website provides air
pollution forecast maps for O3 and PM2.5,
plus real-time air pollution maps with CO,
O3, PM10, and PM2.5 data for major
metropolitan areas, including the Phoenix
metropolitan area. Again, different colors
on the map indicate health risks using
pollutant concentrations. Figure 2 shows
there is a moderate health risk due to O3
and PM2.5 within the yellow area and an
increased risk for unhealthy or sensitive
groups within the orange area.
The MCAQD has participated in the
AIRNow AQI program since 2001. The
MCAQD, in cooperation with ADEQ and
PCAQCD, expanded the area that the
maps cover. This area now includes sites
as far east as Queen Creek, as far south as
Casa Grande, and as far west as Palo
Verde.
Figure 2. AIRNow AQI Forecast Map
Source: EPA AIRNow Website

Figure 3 shows the MCAQD website, which also provides AQI values for our local air monitoring
sites in colored circles.

Figure 3. Maricopa County’s AQI Map
Source: MCAQD’s Air Quality Website

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Information Regarding the Causes, Characteristics, and Compliance of Criteria Pollutants
The information regarding air pollutants was compiled from various pages at the EPA’s Air and
Radiation website.
Carbon Monoxide (CO)
Carbon monoxide is a colorless, odorless gas found in both outdoor and indoor air. Carbon monoxide
is primarily formed by the incomplete combustion of fossil fuels, e.g., carbon-containing fuels, and the
photochemical reactions of gases in the atmosphere. Carbon monoxide is produced by both natural
and anthropogenic sources, e.g., human activities. One of the more significant anthropogenic sources
of CO is automobile exhaust, which currently contributes to about 50 percent of CO emissions
nationwide. Concentrations of CO from motorized vehicles lowered considerably over the last two
decades partly due to replacing carburetors with fuel injectors, which results in a more complete
combustion of fuel. Industrial processes use CO to synthesize many compounds such as acetic
anhydride, polycarbonates, acetic acid, and polyketones, which contributes some CO emissions.
Carbon monoxide is emitted from the manufacturing of carbon black, which is used in numerous
industrial applications such as a pigment in paints and as a reinforcing filler material in tires and rubber
products. Natural, or biogenic, sources of CO emissions include volcanic emissions and smoke from
wildfires. Smoke from tobacco, cooking, fireplaces, and woodstoves contribute to indoor exposure to
CO. The global CO background measurements in ambient air are usually in the range of 25-350 ppb in
the unpolluted atmosphere. Concentrations of CO tend to peak in the colder, winter months.
Many factors can influence a person’s potential to respond adversely to CO exposure including: preexisting medical disorders or disease states, age, gender, lifestyle, or increased CO exposures. People
are considered to be at greater risk from chronic CO exposure when they live close to CO sources,
including heavily travelled roadways. The population that is considered most at-risk from CO
exposure includes: people with cardiovascular diseases, i.e., heart problems such as coronary artery
disease and congestive heart failure, people with breathing problems due to chronic bronchitis, asthma,
and chronic obstructive pulmonary disease, and people who suffer from anemia. Additional
populations that may be at-risk include infants, children, and pregnant women; however, more study is
needed in this area.
Carbon monoxide enters the body through inhalation, and the body eliminates CO primarily through
exhalation and to a lesser extent through metabolic activity. After being inhaled, CO enters the
bloodstream and binds to the blood’s hemoglobin; thereby forming carboxy-hemoglobin that displaces
oxygen (O2) in the blood. This reduces the blood’s capacity to carry O2 to organs and tissues and
causes the body to become O2 deprived. This deprivation of O2 is called hypoxia. This can adversely
affect those with anemia, because anemia already reduces the blood’s ability to carry O2. Exposure to
CO can result in a type of cardiovascular disease called ischemic heart disease, especially for those
with existing heart problems. The central nervous system is adversely affected by CO as well. Acute
exposure to severely high levels of CO is toxic and potentially fatal, and its effects on the body are
well-known and widely studied. According to the Agency for Toxic Substances and Disease Registry,
severe acute poisoning can cause cardiac arrest, heart attack, seizers, hypotension, respiratory arrest,
noncardiogenic pulmonary edema, and coma. Moderate exposure may include many symptoms such
as: confusion, chest pain, and weakness. Mild exposure may lead to symptoms that include: headache,
nausea, vomiting, dizziness, and blurred vision.

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Furthermore, studies show that when CO is released into the environment, it remains in the atmosphere
for approximately 2 months from the time of release and can be transported over long distances. When
NOx and water vapor are present in the air, and both usually are present to some degree depending on
one’s geographic location, they cause photochemical oxidation of CO that produces ground-level, or
tropospheric, ozone (O3). The National Aeronautics and Space Administration (NASA) jet propulsion
laboratory website provides a brief summary on how O3 forms and this reaction process. For this
reason, CO is considered to be a precursor to O3, and CO’s influence on the formation of ground-level
O3 is of great interest to public health officials. To help better understand this process, EPA requires a
CO analyzer at Type 2 stations within the Photochemical Ambient Monitoring Stations (PAMS)
network. The ADEQ operates a PAMS Type 2 station within the Phoenix metropolitan area at JLG
Supersite, and CO measurements have been collected at this site as far back as 1993.
Last, CO is considered a weak greenhouse gas (GHG) itself, but it adversely affects concentrations of
other GHGs that are believed to contribute to global warming including: methane, ground-level O3,
and carbon dioxide (CO2). As per the EPA’s website on climate change, CO2 accounts for about 82%
of GHG emissions due to human activities.
In 1971 EPA established identical primary and secondary standards for CO: an 8-hour primary
standard at 9 parts per million (ppm) and 1-hour primary standard at 35 ppm. The EPA has reviewed
the CO NAAQS several times since 1971, which led to the secondary standard being revoked in 1985.
The primary standard levels have not changed to date, and currently, CO concentrations nationwide are
substantially lower than the CO NAAQS. In 2014, Maricopa County achieved its 18th consecutive
year of compliance with the 8-hour CO standard.
This general summary was compiled from the EPA’s Air and Radiation website plus and the EPA’s
OAQPS Health and Environmental Impacts Division recently published the Quantitative Risk and
Exposure Assessment for Carbon Monoxide – Amended July 2010, which provides current CO
exposure risk assessment information. This report was produced for the 2010 CO NAAQS review.

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Lead (Pb)
Lead is a heavy metal that occurs naturally in the environment and is used in manufactured products.
The major sources of Pb emissions have historically been motor vehicles such as cars and trucks, and
industrial sources. In the early 1970s, EPA set national regulations to gradually reduce the Pb content
in gasoline. In 1975, unleaded gasoline was introduced for motor vehicles equipped with catalytic
converters. The EPA banned the use of leaded gasoline in highway vehicles in December 1995. As a
result of EPA's regulatory efforts to remove Pb from gasoline, levels of Pb in the air decreased by 94
percent between 1980 and 1999. Levels of airborne Pb in Maricopa County were drastically reduced
following the removal of Pb from automotive fuel. Since Pb concentrations were consistently below
national levels, Maricopa County was allowed to discontinue ambient air monitoring for Pb in 1997.
Due to the phase-out of leaded gasoline, metals processing is the major source of lead emissions to the
air today. The highest levels of Pb in air are generally found near lead smelters. General aviation
airports are also a significant source of Pb, as general aviation fuel still contains Pb additives. Other
stationary sources are: waste incinerators, utilities, and Pb-acid battery manufacturers.
An array of adverse health effects can be attributed to Pb exposure. Once taken into the body, Pb
distributes throughout the body in the blood and accumulates in the bones. Depending on the level of
exposure, Pb can adversely affect the nervous system, kidney function, immune system, reproductive
and developmental systems, and the cardiovascular system. Lead exposure also affects the O2 carrying
capacity of the blood. Currently, the foremost health effects associated with Pb exposure to children
are neurological and for adults cardiovascular, e.g., high blood pressure and heart disease. Infants and
young children are especially sensitive to even low levels of Pb, which may contribute to behavioral
problems, learning deficits, and lowered IQ.
Lead is persistent in the environment and accumulates in soils and sediments through deposition from
air sources, direct discharge of waste streams to water bodies, mining, and erosion. Ecosystems near
Pb point-sources demonstrate a wide range of adverse effects including losses in biodiversity, changes
in community composition, decreased growth and reproductive rates in plants and animals, and
neurological effects in vertebrates.
Recent changes in the Pb NAAQS prompted the need to resume Pb monitoring activities within
Maricopa County. In 2008, the Pb primary standard was revised to better public health, especially in
“sensitive” populations, which include asthmatics, children, and the elderly. Initially, Pb monitoring
was required near sources that emitted more than one ton of Pb per year. Later, Pb monitoring was
required at NCORE stations around the U.S. In July 2010, MCAQD opened a new Pb monitoring site
at Deer Valley Airport. The Deer Valley Airport is one of the busiest general aviation airports in
Maricopa County, and the largest expected source of Pb emissions. Results from more than four years
of monitoring have shown that ambient levels of Pb at the airport are still well below the current Pb
NAAQS. The ADEQ operates the local NCORE station, and Pb concentrations have been collected at
the JLG Supersite using a PM10 sampler and inductively coupled plasma mass spectrometry for sample
analysis as per EPA NCORE requirements.

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Nitrogen Oxides (NOX) with Nitrogen Dioxide (NO2) as the Indicator Compound
Nitrogen dioxide belongs to a family of highly reactive gases called NOx. These gases are formed
when fuel is burned at high temperatures, and they are primarily emitted from automobile exhaust and
power plants. Nitrogen oxides are key compounds in the production of ground-level ozone (O3).
Ozone is formed when NOx and volatile organic compounds (VOC) react in the presence of heat and
sunlight. Emissions control measures have helped to significantly reduce NO2 and may have the
important co-benefit of reducing the formation of O3 and fine particles as well.
When discussing health effects from this family of gases as well as NAAQS compliance, NO2 is
referenced; because, it has been selected by EPA as the “indicator” compound for NOx. Unlike the
other gaseous CPs, we measure the ambient levels of NOx indirectly using chemiluminescent
analyzers. The analytical process is sophisticated, but it basically involves determining the
concentration of NO2, then nitric oxide (NO). The NO2 and NO concentrations are summed to
determine the NOX concentration as shown below.
Equation 1: NO2 + NO = NOx
For most of the population, the primary route of NO2 entry into the body is inhalation. Current
scientific evidence links short-term NO2 exposures, ranging from 30 minutes to 24 hours, with adverse
respiratory effects including airway inflammation in healthy people and increased respiratory
symptoms in people with asthma. Studies show a connection between breathing elevated short-term
NOx concentrations and increased visits to emergency rooms and hospital admissions for respiratory
issues, especially asthma. Additionally, NO2 reacts with ammonia, moisture, and other compounds to
form small particles. These small particles penetrate deeply into sensitive parts of the lungs and can
cause or worsen respiratory disease, such as emphysema and bronchitis, and can aggravate existing
heart disease, leading to increased hospital admissions and premature death.
In 1971, EPA set the first primary and secondary standards for NO2 at 53 ppb, averaged annually.
EPA reviewed the standards in 1985 and 1996, and chose not to revise either standard. In January
2010, EPA retained the 1971 standards and added to the primary standard a one-hour average limit of
100 ppb for the 98th percentile of the three-year average.
Recent research indicates that individuals who spend time on or near major roadways can experience
acute NO2 exposures considerably higher than measurement collected by the NO2 network. Research
by the EPA shows that NO2 concentrations in vehicles and near roadways are appreciably higher than
those measured at monitors in the current nationwide NO2 network. EPA reports that in-vehicle
concentrations can be 2-3 times higher than measured at nearby area-wide monitors. Near-roadway
(within about 50 meters) concentrations of NO2 have been measured to be approximately 30 to 100%
higher than concentrations away from roadways.
For this reason, in February 2010 the EPA revised 1-hour NO2 NAAQS and promulgated requirements
for monitoring NO2 at near-roadway stations. The S/L/T MOs are required to install near-road NO2
monitoring stations in larger urban areas where hourly NO2 concentrations are believed to be the
highest in that urban area.
The regulations require a CBSA with 2,500,000 or more persons, or those CBSAs with one or more
roadway segments carrying traffic volumes of 250,000 or more vehicles as measured by annual

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average daily traffic (AADT) counts, to operate two near-road NO2 monitors within that CBSA. Based
on this regulation, Maricopa County is required to have two near-road NO2 monitoring stations.
To ensure compliance with the new 1-hour NO2 standard, AMD completed the installation and startup
of the first of two near-road stations in February 2014. The station is housed at the new “Diablo” site,
which is located off the I-10 near the Broadway curve, east of downtown Phoenix. We are currently in
the construction phase for the second near-road monitoring station off the I-10, west of downtown.
The new “Thirty-third” station is anticipated to startup in the second half of 2015.
In 2014, we recorded one 1-hour value that exceeded the 1-hour NO2NAAQS limit at the Buckeye site,
which is attributed to interference from exhaust of nearby construction vehicles. This is supported by
meteorological data and site observations by personnel. Maricopa County is currently in attainment
status for NO2 compliance limits established in 1971 and 2010. In fact, there are no areas within
Arizona that are in nonattainment with the NO2 NAAQS.

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Ozone (O3)
Ozone is a colorless, slightly odorous, reactive gas in which three oxygen atoms combine to form a
molecule. Ozone occurs naturally in the Earth’s upper atmosphere, known as the stratosphere, where it
has a beneficial effect of protecting us from the Sun’s harmful ultraviolet rays. However, at groundlevel in the troposphere, it is the main component of smog, can harm our health, and affect vegetation
and ecosystems even at low concentrations. Anthropogenic activities have been a leading cause of
ground-level O3 due to VOC and NOx being emitted into the atmosphere from industrial facilities,
electric utilities, motor vehicle exhaust, gasoline vapors, and chemical solvents. Nationally, O3
concentrations declined in the 1980's, leveled off in the 1990's, and showed a notable decline after
2002 in part due to more stringent emission controls that lowered VOC and NOx concentrations.
Ozone is not directly emitted into the air, but is formed by a complex photochemical reaction that
involves sunlight, heat, and a “soup” of pollutants, especially VOCs and NOx. Ozone is continually
going through a rapid, natural cycle of being formed, then converted back to the more stable, or
“normal”, double oxygen molecule (O2). Ozone is likely to reach unhealthy levels on hot, sunny days
in urban environments, but it can impact rural areas by being transported long distances by wind.
Although the Phoenix metropolitan area has sunshine most of the year, there is a seasonal pattern to O3
concentrations with lower concentrations occurring in the winter months. It is interesting to note that a
recent study observed elevated O3 concentrations during cold months at a few high elevation locations
in the western U.S. due to high levels of local VOC and NOx emissions.
Ozone causes significant physiological and pathological changes in both animals and humans at
concentrations present in many urban environments. Ozone affects the respiratory system in people
and animals, and it also affects the growth of plants. The primary route of entry into the body is
inhalation. Symptoms of O3 exposure generally involve the lungs, and can include: coughing, a sore or
scratchy throat, shortness of breath and chest pain on deep inhalations, increases in asthma attacks, and
damage to the lungs. The population at the greatest risk is children. This is because: their lungs are
still developing, they are more likely to be active outdoors when O3 levels are high, and they are more
likely to have asthma than adults.
Animal studies suggest that O3 exposure interferes with or inhibits the immune system. With plants,
O3 at ambient concentrations injures the stomates, which are the cells that regulate plant respiration,
resulting in flecks on the upper leaf surfaces of dichotomous plants and the death of the tips of
coniferous needles. Ozone is considered by plant scientists to be the most important of all of the
phytotoxic air pollutants, causing over 90 percent of all plant injury from air pollution on a global
basis.
In 1997, the primary and secondary O3 NAAQS were lowered to 0.08 ppm using the annual fourthhighest daily maximum 8-hour concentration, averaged over three years. Many O3 monitoring sites
were found to exceed this limit, which led to EPA designating Maricopa County as nonattainment for
the 1997 NAAQS in 2004. On June 15, 2005, EPA revoked the 1997 1-hour average primary standard
for O3, and it was replaced by the 8-hour average standard for compliance purposes.
In March 2008, the NAAQS were lowered again to better protect public health and welfare. The EPA
reduced the primary and secondary 8-hour O3 NAAQS from 0.080 to 0.075 ppm (75 ppb). When the
2008 NAAQS became effective in May 2008, O3 concentrations in the County had improved, but they
were exceeding the new limit. This led to EPA designating portions of Maricopa and Pinal Counties as
marginal nonattainment for the 2008 O3 NAAQS in 2012. Excluding portions of Maricopa and Pinal
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Counties, Arizona is currently in attainment for the O3 NAAQS. Compliance with the standard is
determined by averaging the 4th highest 8-hour average over a 3-year period. This 3-year average must
be less than or equal to 0.075 ppm.
In November 2014, the EPA signed a notice to revise the O3 NAAQS. The EPA proposed new
primary and secondary O3 standard limits within the range of 0.065 to 0.070 ppm. EPA is under court
order to issue a final rule on the revised O3 NAAQS by October 1, 2015. In 2014, 14 out of 18
MCAQD sites exceeded the 8-hour average of 0.075 ppm at least once during O3 season. Based on our
data, it is clear that lowering the NAAQS will introduce additional compliance challenges for
Maricopa County. To achieve compliance with the new NAAQS and to improve air quality for all,
additional strategies to reduce O3 will have to be developed and implemented, and air monitoring
efforts and associated resources are bound to increase. Lowering the NAAQS may potentially affect
the attainment status of other geographical areas in Arizona, too.

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Particulate Matter (PM)
Particulate matter is a collective term describing very small solid or liquid particles that vary
considerably in size, geometry, chemical composition, and physical properties. Numerous chemical
components may be present in particle pollution including: acids, such as nitrates and sulfates, organic
chemicals or biomass, metals, soils, and finer dust particles. Particulates can be formed by natural
processes, such as pollen production and wind erosion, and anthropogenic activities, such as
commercial, industrial, and agricultural operations. Particulates contribute to visibility reduction, pose
a threat to public health, and cause economic damage.
Again, EPA currently regulates PM pollution using two size categories:
•

“PM10” with size range ≤10 micrometers (µm) in aerometric diameter;

•

“PM2.5”, aka "fine particles", with a size range of ≤2.5 µm in aerometric diameter.

The larger particles that make up PM10 form through mechanical processes such as the grinding of
matter and the atomization of liquids, natural weathering processes, and anthropogenic activities that
disturb soil. The earth’s crustal components are often present in PM10. In Arizona, elevated
concentrations of PM10 are associated with people driving on unpaved roads, dusty industries, and dust
storms related to high wind events. Previously, air quality personnel have referred to PM10 as “coarse”
PM; however, the description of PM coarse is evolving. The EPA currently refers to coarse PM (PM102.5 or PMc) as particles having a diameter between 2.5 µm and 10 µm. Years ago, coarse particles were
defined as having diameters ranging from about 2.5 μm to more than 40 μm. Furthermore, recent
health effects studies are starting to separate PM into several size ranges: PM10, PM2.5, PMc, and
“ultrafine” particulates, a subpart of PM2.5 with particles having ≤1.0 µm aerometric diameter. The
ability to separate particulates into these size categories is possible due to advances in PM monitors.
Fine particulates are formed by the condensation of vapors or by their subsequent growth through
coagulation or agglomeration. Fine particulates are further classified as “primary”, meaning they are
produced within and emitted from a source such as a controlled burn, wildfire, or a fireplace with little
subsequent change, or “secondary”, meaning they are not directly emitted by the sources such as
power plants and automobiles. Secondary particulates form in the atmosphere from gaseous emissions
from sources. For example, the fine particles in smoke are classified as primary. Nitrates and sulfates
are classified as secondary, because they formed by oxidation of gaseous SO2 and NO2. Last, some
fine PM constituents, such as atmospheric carbon, can be classified as both a primary and secondary
particulate, because it forms either way.
For PM, the primary route of entry into the body is through inhalation. The size, shape, and chemical
composition of particulates determine the health effects that may result from PM exposures. The
potential for causing health problems is directly linked to particle size. Smaller particles are more
toxic than larger particles because of the higher relative content of toxic metals and ions combined
with the increase of particle surface area. The EPA is concerned about particles ≤10 µm in diameter,
because those are the particles that generally pass through the throat and nose and enter the lungs.
Coarser particles are deposited in the upper parts of the respiratory system, but finer particles are
deposited deeper into the respiratory system. Fine particles are small enough to be deposited in the
lung’s alveoli, which are tiny air sacks deep inside the lungs. Some research shows that the smallest of
particles may enter the bloodstream as well. Currently, research is being conducted to better
understand the health effects of ultrafine particles.
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The populations most at risk from particulate exposure are diabetics, older adults, and children,
because they tend to be more physically active and this causes them to breath faster and deeper. Once
inhaled, these particles can cause serious heart and lung health effects that affect both humans and
animals. Epidemiological studies show that long-term, chronic exposures, e.g., years, to high levels of
particulates are associated with reduced lung function, the development of chronic bronchitis, and
premature death. Studies show that short-term, acute exposures, e.g., hours to days, to high levels of
particulates can aggravate lung disease, cause asthma attacks and acute bronchitis, and may increase
susceptibility of respiratory infections. For those with heart disease, it can induce heart attacks.
Acidic aerosols have been linked to the inability of the upper respiratory tract and pulmonary system to
remove harmful particles.
In 1987, the EPA replaced the 1971 Total Suspended Particulates (TSP), i.e., particles around 40 µm
and less in aerometric diameter, with the primary and secondary NAAQS for PM10. The EPA revoked
the annual PM10 NAAQS in 2006. Currently, the 24-hour primary and secondary limits for PM10 are
both 150 µg/m3. In 2012, the PM10 NAAQS underwent review with exposure to PM10-2.5 also being
considered. This review resulted in EPA retaining the existing primary and secondary 24-hour PM10
NAAQS, which is considered to provide for protection again effects associated with acute exposure to
thoracic PM10-2.5, i.e., inhaled particles that make it past the larynx. According to the January 15, 2013
Federal Register (78 FR 3085), the U.S. EPA Administrator concluded that “the available health
evidence and air quality information for PM10-2.5, taken together with the considerable uncertainties
and limitations associated with that information, suggests that a standard is needed to protect against
short-term exposure to all types of PM10-2.5 and that the degree of public health protection provided
against short-term exposures to PM10-2.5 does not need to be increased beyond that provided by the
current PM10 standard.” This indicates that future NAAQS may be forthcoming for PM10-2.5. The EPA
is scheduled to complete the next NAAQS review for the PM standards in 2017.
In 1997, the EPA reviewed and updated the PM2.5 NAAQS limits. Since then, these NAAQS have
been reviewed in 2006 and 2012 with some limits being made more stringent. On December 14, 2012,
EPA retained the primary 24-hour PM2.5 standard of 35 µg/m3, but reduced the primary and secondary
NAAQS annual PM2.5 limit to 12 µg/m3 and 15.0 µg/m3, respectively. The January 2013 Federal
Register (78 FR 3085), also shows the U.S. EPA’s final determinations for the 2012 PM2.5 NAAQS
review. The EPA’s new rulings on the PM NAAQS became effective March 18, 2013.
Effective April, 15, 2015, Maricopa County remains “unclassifiable/attainment” for the PM2.5
NAAQS. A status of unclassifiable/attainment means that Maricopa County’s air quality meets or is
expected to meet the PM2.5 NAAQS, but limited data were available for use when the determination
was made. This is good news, because we tend to experience 24-hour exceedances during the colder,
winter months near the Thanksgiving, Christmas and New Year’s Day holidays. In colder months,
smoke from residential fireplaces coupled with the air inversion tends to drive up PM2.5 concentrations
throughout the metropolitan area.
In 2014, ADEQ and Maricopa County representatives worked together on a public outreach campaign
to improve air quality in the County around the fall/winter holidays. Controls to reduce particulates
have been in place for decades, beginning in the 1960s with a Pima County ordinance that required
watering to reduce dust from construction. Maricopa County's umbrella dust abatement rule, Rule 310,
has been revised many times through the years and now regulates construction dust, trackout dust from
construction sites, and dust from unpaved parking and vacant lots. Efforts to reduce dust resuspended

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from paved roads have concentrated on eliminating trackout from construction sites, curbing and
stabilizing road shoulders, and investigating more efficient street sweepers.
The Governor's Agricultural Best Management Practices Committee has developed a rule containing
best management practices for agricultural activities (AgBMP) to reduce particulate emissions from
tilling and harvesting activities of croplands and non-croplands.
The recent PM10 State
Implementation Plan (SIP) includes seventy-seven new measures to enhance enforcement of the
County’s dust rules, implementation of AgBMP, diesel engine replacement and retirement programs,
and requirements for cleaner burning fireplaces to further reduce PM2.5 emissions. As vehicle
emission controls helped to reduce fine particulates and precursor gases, these cleaner burning
fireplaces can reduce fine particulates as well. For example, reducing gaseous hydrocarbon emissions
led to reductions in ambient concentrations of secondary organic carbon.
In 2005, Congress identified a need to account for events that result in exceedances of the NAAQS that
are “exceptional” in nature, i.e., not expected to recur or caused by acts of nature beyond man-made
controls. In response, the U.S. EPA promulgated the Exceptional Events Rule (EER) found in 40 CFR
Parts 50 and 51 on March 22, 2007 (72 FR 13560). In an attempt to clarify this rule, the U.S. EPA
released interim guidance documents on the implementation of the EER to S/T/L agencies for review
on May 10, 2013. Maricopa County is susceptible to both windblown dust due to the arid climate and
to smoke events from fires, both of which may qualify as an “exceptional event” (EE). The EER
allows for S/T/L to "flag" ambient air quality monitoring data as an EE and to exclude those data when
determining NAAQS exceedances or violations if the EPA concurs with the demonstration package.
Some exceedances of the PM10 NAAQS within Maricopa County have been successfully shown to
meet the EE requirements. Exceptional event information for 2012 – 2014 is shown in the 2014
Summary of Network Results and Required Information section. The ADEQ is responsible for
producing and submitting EE packages to EPA Region 9 for concurrence.
The MCAQD implemented an automated alarm system that triggers email notifications and/or
telephone calls to subscribers when concentrations of PM10 and PM2.5 escalate to help reduce their
concentrations. Subscribers of the alert system include, but are not limited to: MCAQD’s compliance
and air monitoring personnel as well as industrial source representatives who can take action to reduce
PM emissions cause by their work activities. In addition, the County enforces a “no burn restriction”
when a PM2.5 High Pollution Advisory (HPA) is issued by ADEQ.

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Sulfur Dioxide (SO2)
Sulfur dioxide is a colorless gas with a pungent irritating odor at elevated concentrations. It is emitted
in gaseous form primarily from burning high-sulfur coal, oil, and diesel fuel. Most fuels contain trace
quantities of sulfur and their combustion releases both gaseous SO2 and particulate sulfate; therefore,
separating the health effects of these two chemicals is difficult. Together, SO2 and PM2.5 make up a
major portion of the pollutant load in many cities, acting separately and in concert to threaten public
health.
Sulfur dioxide’s primary route of entry into the body is by inhalation. It contributes to respiratory
illness, particularly in children and the elderly, and aggravates existing heart and lung diseases. Sulfur
dioxide contributes to the formation of acid rain, and it contributes to the formation of atmospheric
particles that cause visibility impairment, most notably in national parks. Sulfur dioxide and the
pollutants formed from SO2, such as sulfate particles, can be transported over long distances and
deposited far from the point of origin. This means that problems associated with SO2 are not confined
to areas where it is emitted.
Sulfur dioxide is removed from the atmosphere through dry deposition on plants, and it is converted to
sulfuric acid, and eventually sulfate particles. Both contribute to public health problems and
negatively impact the environment. The SO2 and sulfate from vehicular emissions have been
significantly reduced over the years through lowering the sulfur content in diesel fuel and gasoline.
The EPA 2011 National Emissions Inventory (NEI) report shows the estimated quantity of SO2 emitted
from various sources in Arizona and in Maricopa County.
The majority of state-wide SO2 emissions occurs in eastern Arizona and is produced by coal-based
electricity generation, the smelting of non-ferrous, e.g., non-iron-containing, sulfide copper ore from
mines, and smoke from wildfires. Major controls were installed in Arizona's copper smelters in the
1980s, which reduced SO2 emissions substantially. In addition, most of the copper ore smelters that
used to operate have been shutdown, which reduced SO2 emissions in localized areas around the state.
As of 2013, the only regulated smelters operating in Arizona are located about 90 miles east of
downtown Phoenix, in Miami and Hayden, Arizona.
In Maricopa County, the majority of SO2 is emitted from mobile and industrial sources. Currently,
MCAQD operates two year-round SO2 monitoring stations using pulsed fluorescence analyzers. The
siting of SO2 monitors is based on EPA requirements, as is the case for all ambient air monitoring
networks.

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AIR MONITORING STRATEGIES AND SURVEILLANCE SYSTEM DESIGN

Overview of the Criteria Pollutant Networks
The AMD monitors for the six CPs by operating and maintaining 25 ambient air monitoring sites
located throughout Maricopa County. The sites’ startup dates range from 1961 for Central Phoenix to
2014 for Diablo. Land use patterns around the sites vary from densely populated urban areas to
sparsely populated rural settings. The sites’ elevations range from 845 feet above sea level at Buckeye
to 5190 feet above sea level at the top of Humboldt Mountain. Each site’s pollutant monitoring
station(s) are chosen based on specific EPA requirements as described below, special requests from
EPA, and/or specific needs of the County. Some sites measure many pollutants; while others may only
measure one or two. The requirements for operating the ambient air monitoring system are found in
both 40 CFR Parts 50 & 58.
The MCAQD has been designated as a Primary Quality Assurance Organization (PQAO) by EPA R9
for our ambient air monitoring program, which basically means that we do not share QA roles and/or
responsibilities with another MO. The MCAQD is fully responsible for designing, operating, and
reporting data from our surveillance system to EPA’s AQS database. However, MOs within Arizona
may provide support to each other by exchanging technical services and/or knowledge when problems
arise with instrumentation or special studies.
This section details how MCAQD designs its air monitoring networks to obtain representative CP data.
In addition to producing this AMNP, EPA now requires a five-year network assessment as per 40 CFR
§ 58.10. The 5-year assessment is best served by collaborating with EPA, ADEQ, and other local
and/or tribal agencies. The first assessment was produced in 2010 and the second will be produced in
2015. The assessment process continues to improve, and MCAQD is working with other MOs
regarding CP network design issues to the extent possible.
Monitoring Objectives
The ambient air monitoring networks must be designed to meet the three basic monitoring objectives
listed below. The order of these objectives shown below is not based upon priority. Each objective is
important and must be considered individually.
1. Provide air pollution data to the general public in a timely manner. Data can be presented to the
public in a number of attractive ways including: air quality maps, newspapers, MO and EPA
websites, and as part of weather forecasts and public advisories.
2. Support compliance with the NAAQS and developing emission control strategies. To determine
compliance with the NAAQS and to develop attainment and maintenance plans, only data collected
by EPA-approved methods can be used. The EPA classifies approved methods into one of three
categories: a federal reference method (FRM), a federal equivalent method (FEM), or an approved
regional method (ARM). The MCAQD only uses FRM and FEM instruments within the CP
surveillance system. This practice ensures high-quality data of like kind are used for compliancedriven decisions. However, additional data from research monitors can be used to further evaluate
regional air quality models used in developing emissions’ strategies, tracking trends in air
pollution, and evaluating the impact control measures are having on improving air quality.

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3. Support air pollution research studies geared toward assessing health effects, atmospheric
processes, or future monitoring methods in development. In addition to data collected by FRM and
FEM monitors, MCAQD may produce other data for special studies as well. These data can be
made available for decision makers; but they are not necessarily reported to AQS. In Maricopa
County, EPA R9 has charged ADEQ with collecting the majority of research data at JLG Supersite
via the following networks: National Core multi-pollutant site (NCORE), Photochemical Ambient
Monitoring Stations (PAMS), Chemical Speciation Network (CSN), National Air Toxics Trends
Stations (NATTS), and Urban Air Toxics Monitoring Program (UATMP). The data from these
networks should be available in AQS.
Monitoring Site Types
To support the three basic air monitoring objectives, a network must be designed with a variety of
monitoring site “types”. Monitoring sites must be capable of informing managers and the general
public about peak air pollution levels, typical levels in populated areas, air pollution transported into
and outside of a city or region, and air pollution levels near specific sources (see Table 3).
Table 3. Site Monitoring Types
Measure highest concentrations expected to occur in the area covered by the network.
Measure typical concentrations in areas of high population density.
Determine the impact of significant sources or source categories on air quality.
Determine general background concentration levels.
Determine the extent of regional pollutant transport among populated areas and in support of
secondary standards.
Measure air pollution impacts on visibility, vegetation damage, or other welfare-based impacts.
Source: Adapted from 40 CFR Part 58, Appendix D

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Spatial Scales of Monitoring
The concept of “spatial scale of representativeness” was created to help link monitoring objectives and
site types with the physical location of a monitor. The spatial scale of representativeness is defined in
terms of the physical dimensions of the air parcel around a monitoring site throughout which pollutant
concentrations are reasonably similar. There are six scales of representativeness of most interest for
the monitoring site types (see Table 4).
Table 4. Spatial Scales of Representativeness
Name

Distance

Micro Scale

0 to 100 meters

Middle Scale

100 to 500 meters

Neighborhood Scale

0.5 to 4 kilometers

Urban Scale

4 to 50 kilometers

Regional Scale

10 to 100s of kilometers

National and Global Scales

Characterizing the nation and the globe as a whole.

Source: Adapted from 40 CFR Part 58, Appendix D, 1.2

Air Monitoring Station Classifications
It is worth noting that NO2 air monitoring stations can have several different classifications. An NO2
station’s classification is largely determined by the underlying purpose for collecting the data, and the
definitions regarding the various station classifications are found in 40 CFR Part 58. A brief overview
of the potential NO2 station classifications is provided below.
State and Local Air Monitoring Stations (SLAMS)
The stations operated by ADEQ are most often SLAMS, which gather data for comparison to the
NAAQS. “SLAMS” make up the ambient air quality monitoring sites that are primarily needed for
NAAQS comparisons, but may serve other data purposes as well. The SLAMS exclude special
purpose monitors (SPM) and Prevention of Significant Deterioration (PSD) monitors, but include air
monitors for specialized programs that are considered a subset of SLAMS such as the near-road,
NCORE, and PAMS stations.
Special Purpose Monitor Stations
As defined by 40 CFR Part 58, an “SPM station” means a monitor included in an agency’s network
that the agency has designated as a special purpose monitor station in its monitoring network plan and
in the AQS. The agency does not count an SPM toward showing compliance with the minimum
requirements for QA, siting, or for the quantity of monitors needed for a particular criteria pollutant.
SPMs are not required to meet the rigorous QA/QC requirements applied to SLAMS monitors. Often

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SPMs are used to quickly gather and report preliminary information regarding air quality in a local
area.
It is important to reference EPA requirements regarding the operation of an SPM monitor. It is
important to note that if an SPM station uses an FRM, FEM, or an ARM method and meets the
SLAMS siting requirements in 40 CFR Part 58 Appendix E, then the agency can be limited to its
removal without EPA approval. Removal depends upon the particular CP concentrations recorded and
the monitor’s operating duration. Usually, if the monitor operates for more than two years, removing it
will need prior approval by EPA. In the event of a geographical area’s population increases or air
quality data indicate a SLAMS is more appropriate, an SPM station may be reclassified to a SLAMS
and potentially outfitted with a different model FEM monitor.
Locating Monitors
Since it is physically and fiscally impossible to monitor air quality in every location, the goal in
locating monitors is to correctly integrate the monitoring objective and monitoring site type with the
spatial scale of representativeness most appropriate for the air pollutant to be measured. For example,
consider the case where the objective is to determine NAAQS compliance by understanding the
maximum O3 concentrations for an area. Such areas would most likely be located downwind of a
metropolitan area, quite likely in a suburban residential area where children and other susceptible
individuals are likely to be outdoors. Sites located in these areas are most likely to represent an urban
scale of measurement. In this example, physical location was determined by considering O3 precursor
emission patterns, public activity, and meteorological characteristics affecting O3 formation and
dispersion. Thus, spatial scale of representativeness was not used in the selection process, but was a
result of site location.
Using these principles, the total number of monitoring sites that will serve the variety of data needs
will be substantially higher than federal minimum requirements. The optimal size of each pollutant’s
network involves trade-offs among data needs and available resources; and, the network’s size is
subject to change over time. Each pollutant’s network must be dynamic enough to maintain a current
representative sampling of the air quality.

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Overview of the Air Monitoring Sites
Maricopa County has a population of over 3.9 million people based on the 2012 U.S. Census estimate.
As per 40 CFR Part 58, the EPA mandates the minimum quantity of monitors required by a pollutant’s
network to properly represent the County’s population. As previously mentioned, the MCAQD
networks are designed using the concept of spatial scale representativeness and monitoring objectives.
This has resulted in CP networks that meet, and in most cases exceed, the minimum quantity of
monitors required by EPA (see “Required General Information on Monitoring Network” in Appendix
II). The 25 monitoring sites operating in 2014 are shown again in Figure 4.

Figure 4. 2014 Air Monitoring Sites

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The following tables show details regarding each site’s AMD abbreviation symbol, EPA’s AQS
identification number, geographic coordinates, and the full complement of air monitors and/or sensors.
All CP monitors are now classified as SLAMS. Table 5 shows the MCAQD’s site abbreviations and
the AQS identification number. Table 6 shows the specific geographic coordinates for the location of
each site. Table 7 provides the complement of air monitoring instruments operating at each site in
2014.
Table 5. Maricopa County Ambient Air Monitoring Sites for 2014
Name
AMD Abbreviation
AQS ID
Blue Point

BP

04-013-9702

Buckeye

BE

04-013-4011

Cave Creek

CC

04-013-4008

Central Phoenix

CP

04-013-3002

Deer Valley

DV

04-013-4018

Diablo

DI

04-013-4019

Durango Complex

DC

04-013-9812

Dysart

DY

04-013-4010

Falcon Field

FF

04-013-1010

*Fountain Hills

FH

04-013-9704

Glendale

GL

04-013-2001

Greenwood

GR

04-013-3010

*Higley

HI

04-013-4006

Humboldt Mountain

HM

04-013-9508

Mesa

ME

04-013-1003

North Phoenix

NP

04-013-1004

Pinnacle Peak

PP

04-013-2005

Rio Verde

RV

04-013-9706

South Phoenix

SP

04-013-4003

South Scottsdale

SS

04-013-3003

Tempe

TE

04-013-4005

West Chandler

WC

04-013-4004

West 43rd Ave.

WF

04-013-4009

West Phoenix

WP

04-013-0019

*Zuni Hills
ZH
04-013-4016
* This site experienced an extended monitoring interruption in 2014.

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Site

Latitude

Table 6. Location of Air Monitoring Sites
Longitude
Location

AQS Code

BP

33.54549

-111.60925

Usery Pass & Bush Highway

04-013-9702

BE

33.37005

-112.62070

MC 85 & AZ HWY 85

04-013-4011

CC

33.82169

-112.01739

32nd St. & Carefree Highway

04-013-4008

CP

33.45793

-112.04601

19th St & Roosevelt St.

04-013-3002

DV

33.684627

-112.08635

10th Ave. & Deer Valley Rd.

04-013-4018

DC

33.42650

-112.11814

27th Ave. & Durango St.

04-013-9812

DY

33.63713

-112.34184

Bell Rd. & Dysart Rd.

04-013-4010

DI

33.3961

-111.9680

Fairmont Dr. & Diablo Way

04-013-4019

FF

33.45223

-111.73331

McKellips Rd. & Greenfield Rd.

04-013-1010

FH

33.61103

-111.72529

E. Palisades Blvd. & Fountain Hills Blvd.

04-013-9704

GL

33.56936

-112.19153

59th Ave & W. Olive Ave.

04-013-2001

GR

33.46093

-112.11748

27th Ave. & Interstate 10

04-013-3010

HI

33.31074

-111.72255

Higley Rd. & Chandler Blvd.

04-013-4006

HM

33.98280

-111.79870

Top of Humboldt Mountain

04-013-9508

ME

33.41045

-111.86507

Broadway Rd. & Alma School Rd.

04-013-1003

NP

33.56033

-112.06626

7th Street & Dunlap Ave.

04-013-1004

PP

33.70655

-111.85557

Alma School Rd. & Happy Valley Rd.

04-013-2005

RV

33.71881

-111.67183

Forest Rd. & Del Ray Ave.

04-013-9706

SP

33.40316

-112.07533

Central Ave. & Broadway Rd.

04-013-4003

SS

33.47968

-111.91721

Scottsdale Rd. & Miller Rd.

04-013-3003

TE

33.4124

-111.93473

College Ave. & Apache Blvd.

04-013-4005

WC

33.29898

-111.88431

Ellis St. & Frye Rd.

04-013-4004

WF

33.40642

-112.14434

43rd Ave. & Broadway Rd.

04-013-4009

WP

33.48385

-112.14257

39th Ave. & Earll Dr.

04-013-0019

ZH

33.686738

-112.294171

109th Ave & Deer Valley Rd.

04-013-4016

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Table 7. Air Monitoring Instruments by Site

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2014 SUMMARY OF NETWORK RESULTS AND REQUIRED INFORMATION

Determining Data Quality and Acceptability
The EPA has established data quality and measurement quality objectives for CP data. In total, there
are seven data quality indicators established by the EPA to determine the quality of ambient air data.
Data must meet each indicator’s requirement to be acceptable for use by decision makers for NAAQS
compliance determinations, researchers, and the public. These indicators are: precision, bias,
completeness, comparability, detectability, representativeness, and sensitivity. “Timeliness” of data
collection, validation, and upload to AQS is important as well. This sections details the results
obtained from our 2014 monitoring year.
With CP data, accuracy is defined as “a measure of the overall agreement of a measurement to a
known value and includes a combination of random error (precision) and systematic error (bias)
components of both sampling and analytical operations”. The AMD’s personnel evaluate data using
these indicators, with precision, bias, and completeness being the most crucial to evaluate on an
ongoing basis. If CP data pass all validation tests, the data meet EPA’s quality requirements and can
be used to determine compliance with the NAAQS.
Data Completeness
Before any data set can be considered valid, it must first pass a data recovery, or completeness, test.
The test requirements begin with checking completeness at hourly and 24-hour concentration values.
These values are commonly referred to as “samples”. In general, CP pollutant data measurements, or
samples, from continuous analyzers are based on a valid hour; while 24-hour filter samples from
manual samplers are based on a 24-hour sampling period from midnight to midnight. For NAAQS
determinations, the completeness tests are extended to data sets at 3-hour, 8-hour, quarterly, annual,
and multiple year levels of data aggregation, which are specific to each CP.
For CPs, data completeness must be greater than 75% for a data set to pass the first validity test. To
determine data completeness, the total quantity of actual samples/measurements collected is divided by
the total quantity of scheduled samples/measurements for a certain time period.
Equation 2: Data Completeness = Qty. of Samples Scheduled / Qty. of Samples Collected (100)
The annual data completeness for 2014 is shown below (see Table 8).
Table 8. 2014 Criteria Pollutant Data Completeness for SLAMS

Percent
Complete

CO

Pb

O3

NO2

SO2

PM2.5

PM10

TOTAL

98.5%

93.0%

98.4%

98.2%

98.0%

96.8%

98.7%

98.1%

Source: EPA AQS database - 2014 AQS Data Completeness Report (AMP 430)

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Increasing Data Volumes
Due to increasing data requirements and the availability of FEM analyzers, the amount of data the
AMD produces increased considerably over the past few years. Operating and maintaining all the
various components of each air monitoring network is an ongoing challenge. To remain up-to-date
with EPA’s requirements and to meet decision makers’ and researchers’ data needs, AMD personnel
adjusted standard operating processes accordingly to ensure only high-quality are being produced. In
addition to the increased amount of CP data to be generated and validated, supporting components of
the surveillance system such as the communications system to the sites and the database used for data
management needed upgrading, too. So far, AMD has managed to make some significant program
changes to keep up with the increasing demand for data. By automating some processes, we have been
able to successfully respond to data needs without increases to personnel. The following information
summarizes a few notable changes that have been implemented to date.
•

A Rapid Response Notification System (RRNS) was implemented to better manage quicklydeveloping pollution events. The RRNS uses automated alarms to monitor instrument
performance and incoming pollutant concentrations. The triggering instrument warning and
pollutant concentration limits can be adjusted as needed for each alarm.

•

A new, commercial database, AirVision™, was implemented, and it has enhanced our ability to
manage the increase in data volume. It advanced data validation, retrieval/storage/security, and
dissemination. The database must be maintained and updated regularly to keep up with
software changes involving data collection, validation, and reporting to AQS.

•

In addition, AMD now uploads preliminary data to the MC website as close as possible to realtime.

•

AMD personnel perform multiple data checks throughout the workday to help prevent bad data
from being released to the public via the County’s and EPA’s websites.

Table 9 shows the amount of 1-hour data AMD has been producing per year, plus the near ninefold
increase of data produced when AMD started collecting 5-minute data.

Table 9. 2014 Total Amount of Data Produced
Type

1-Hour CP Data

1-Hour CP and Met Data

1-Hour, 5-minute and 24hour CP and Met Data

Amount

587,162

1,612,082

14,901,002

NOTE: The amount does not include non-CP or special projects’ data.

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Summary of Data Produced by the Criteria Pollutant Networks
This section covers the 2014 data generated by each CP’s network.
Carbon Monoxide (CO)

Figure 5. 2014 CO Monitoring Sites
There are two primary standard limits for CO: an 8-hour average of <9 ppm and a 1-hour average of
<35 ppm. A violation of either standard is based on two exceedances in a calendar year. Since CO
concentrations have been significantly lower than the 1-hour limit for so many years, we have not
included it on Table 10. It is worth noting that the area has not exceeded the CO NAAQS since 1996.
The Phoenix metropolitan area and portions of Pinal County were once designated as a moderate
nonattainment CO for the 1971 primary NAAQS. A nonattainment SIP was developed by ADEQ that
covered how to reduce and maintain CO concentrations. The area failed to reach attainment by the end
of 1995, which caused EPA to reclassify the area to serious nonattainment in 1996, with a new
attainment date of December 31, 2000. In response, the Governor's Office, Legislature, Maricopa
County, and other entities worked cooperatively together to find ways to reduce CO that included
implementing innovative programs such as: a nationally recognized vehicle emissions inspection
program, a cleaner burning gasoline program, pollution reduction measures for commercial and
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industrial sources, and woodburning restrictions. As a result, CO concentrations declined and data
showed that the area had reached attainment with the 8-hour primary NAAQS.
In April 2005, the EPA redesignated the Phoenix metropolitan area to attainment for CO and approved
the attainment demonstration and maintenance plan, which shows how the area will maintain
compliance with the CO NAAQS through 2015. However, Maricopa County must continue to show
that the air quality is maintaining compliance with the NAAQS for a period of 20 years from the
attainment determination. The area is now covered by a 10-year maintenance SIP that is renewed in its
8th year for the next 10-year maintenance SIP. Since we are now in maintenance/attainment, the
majority of CO monitors can operate seasonally rather than year-round.
In 2014, the quantity of active CO monitors increased from thirteen to fourteen with the addition of the
Diablo near-road station on February 21st. All CO monitors are classified as SLAMS, and data from
all monitors are reported to the AQS (see Figure 5). For calendar year 2014, no exceedances of either
CO limit were recorded at any MCAQD monitoring sites Table 10.
Table 10. 2014 8-hour Average CO Data Summary
CO 8-hour Average Max.
(ppm)
0.6

CO 8-hour Average 2nd
Highest (ppm)
0.5

Number of 8-Hour
NAAQS Exceedances
0

Central Phoenix

2.5

2.4

0

Diablo

1.4

1.3

0

Dysart

0.6

0.6

0

Glendale

1.4

1.3

0

Greenwood

2.6

2.1

0

Mesa

1.4

1.2

0

North Phoenix

1.4

1.1

0

South Phoenix

2.9

1.9

0

South Scottsdale

1.4

1.3

0

Tempe

1.4

1.4

0

West Chandler

1.7

1.6

0

West Phoenix

4.2

2.8

0

Site
Buckeye

Additional information required by EPA is shown in Table 11.
Table 11. CO Data Required by EPA
CBSA

Population &
Census Year (2012)

Required NearRoad Monitors

Active Near-Road
Monitors

Additional Near-Road
Monitors Needed

38060

4,329,534

2

1

1

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Lead (Pb)

Figure 6. 2014 Pb Monitoring Sites
Figure 6 shows the Deer Valley site, which is the only site collecting Pb data. Two Pb monitors are
required at the Deer Valley Airport for QA purposes and both monitors are classified as SLAMS. The
Pb NAAQS has identical primary and secondary standards based on a rolling 3-month average. The
rolling 3-month average is violated by an exceedance of 0.15 µg/m3.
In July 2010, this Pb monitoring site was opened near the Deer Valley Airport in north Phoenix. This
airport is one of the busiest general aviation airports in the region, and it serves a significant number of
propeller-driven aircraft. Propeller-driven aircraft still use Pb-containing general aviation fuel unlike
jet engine-driven aircraft. A summary of the 2014 Pb data required by EPA is shown in Table 12.

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Table 12. 2014 Pb Data Summary
Site

24-hour Max.
(µg/m3)

24-hour 2nd Highest
(µg/m3)

Deer
Valley

0.087

0.082

Max. 3-month Rolling Number
Quarterly Average
of
3
Samples
(µg/m )
0.05

57

According to the 2011 EPA’s National Emission Inventory, Deer Valley Airport remains the largest
point-source of Pb within Maricopa County that triggers the EPA 1.0 ton per year (tpy) threshold for
Pb emissions, which are shown on Table 13.
Table 13. Pb Data Required by EPA
Source
Name

Location

Deer
Valley
Airport

Phoenix,
AZ

2011
Pb
Emission
(tpy)

Emissions
Inventory
Source &
Data Year

Max 3month
Design
Value
(µg/m3)

Design
Value
Date

Required
Monitors

Active
Monitors

Additional
Monitors
Needed

1.16

General
Aviation
Airport
2011

0.05

January
2014

1

1

0

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Nitrogen Dioxide NOx)

Figure 7. 2014 NO2 Monitoring Sites
All parts of Maricopa County are in attainment for NO2. Compliance with the NO2 standard is
achieved when the annual arithmetic mean concentration in a calendar year is less than or equal to 53
ppb. A new hourly standard for NO2 began in 2010; this regulation states that the 3-year average of
the 98th percentile cannot exceed 100 ppb. For calendar year 2014, no exceedances of the NO2 annual
were recorded at Maricopa County monitoring sites. However, we did exceed the one-hour NAAQS
once at the Buckeye site on 05/05/15.
In 2014, the quantity of active NO2 monitors increased from four to five once the Diablo near-road
station became active in February. Data from all five monitors were reported in AQS (see Figure 7).
All NO2 monitors are designated as SLAMS (see Table 14).

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Table 14. 2014 NO2 1-hour Data Summary
NO2
Maximum
(ppb)

NO2.
98th Percentile
(ppb)

NO2
3-Year Average
of the 98th
Percentiles
(ppb)

102.0*

37.0

36

8.65

Central Phoenix

70.0

60.0

61

19.44

Diablo

62.0

59.0

59

20.85

Greenwood

67.0

64.0

64

24.55

West Phoenix

80.0

57.0

57

17.97

Site Name

Buckeye

NO2 Annual
Average
(ppb)

*Indicates an exceedance of the standard.
Source: The EPA’s 2014 AQS AMP450 Report, aka “Quicklook Criteria Parameters Report”

Additional information required by EPA is shown in Table 15.
Table 15. NO2 Data Required by EPA

CBSA

Population
& Census
Year
(2012)

38060

4,329,534

Max
AADT
Counts

Required
NearRoad
Monitors

Active
NearRoad
Monitors

320,137

2

1

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Additional
Additional
Active
Required
NearArea-Wide
AreaAreaRoad
Monitors
Wide
Wide
Monitors
Needed
Monitors Monitors
Needed

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1

1

4

0

Maricopa County Air Quality Department

Ozone (O3)

Figure 8. 2014 O3 Monitoring Sites
As stated in the O3 summary, compliance with the standard is determined by averaging the 4th highest
8-hour average over a 3-year period. This 3-year average must be less than or equal to 0.075 ppm.
During 2014, eighteen O3 monitors were reported as operational in AQS (see Figure 8). All of the O3
monitors are classified as SLAMS.
In 2014, there were 11 exceedance days of the 8-hour primary standard for O3. Table 16 presents the
2014 data summary for 8-hour O3 at departmental monitoring sites. In addition, there were three
violations of the 8-hour primary standard. The 8-hour standard is violated when a 3-year average
using the 4th highest concentration measured in each year exceeds 0.075 ppm (see Table 16).

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Table 16. 2014 8-hour Average O3 Data Summary
8-hr Max.
(ppm)

2nd Highest
(ppm)

3rd Highest
(ppm)

4th Highest
(ppm)

Qty. of Days
> 0.075 ppm

Blue Point

0.088*

0.076*

0.075

0.074

2

Buckeye

0.068

0.067

0.061

0.060

0

Cave Creek

0.081*

0.076*

0.074

0.074

2

Central Phoenix

0.077*

0.071

0.071

0.071

1

Dysart

0.075

0.074

0.072

0.070

0

Falcon Field

0.088*

0.078*

0.078*

0.076*

4

Fountain Hills

0.075

0.070

0.069

0.068

0

Glendale

0.079*

0.078*

0.075

0.071

2

Humboldt Mt.

0.082*

0.080*

0.077*

0.074

3

Mesa

0.086*

0.079*

0.078*

0.078*

6

North Phoenix

0.082*

0.081*

0.078*

0.078*

6

Pinnacle Peak

0.088*

0.081*

0.081*

0.080*

6

Rio Verde

0.085*

0.077*

0.074

0.073

2

South Phoenix

0.080*

0.076*

0.075

0.073

2

South Scottsdale

0.078*

0.073

0.072

0.072

1

Tempe

0.077*

0.073

0.071

0.071

1

West Chandler

0.074

0.074

0.071

0.070

0

West Phoenix

0.079*

0.078*

0.078*

0.076*

4

Site

* Indicates an exceedance of the standard.
Source: The EPA’s 2014 AQS AMP450 Report, aka “Quicklook Criteria Parameters Report”

Additional information required by EPA is shown in Table 17.
Table 17. O3 Data Required by EPA
CBSA

County

38060

Maricopa

Population
& Census
Year
(2012)
4,329,534

8-Hr Design
Value (ppm)

Design
Value Site

Required
Monitors

Active
Monitors

Additional
Monitors
Needed

0.080

04-013-1004

2

18

0

Source: The EPA’s 2014 AQS AMP 480 Report, aka “Design Value Report”

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Particulate Matter ≤10 Micrometers (PM10)

Figure 9. 2014 PM10 Monitoring Sites
During 2014, sixteen PM10 monitors were reported as operational in AQS (see Figure 9). All PM10
monitors are classified as SLAMS. The Zuni Hills monitor classification was changed from a SPM to
a SLAMS beginning on January 1, 2015. All PM10 monitoring stations now operate continuous PM10
analyzers that collect hourly-averaged data. It is worth noting that EPA does not require PM10
analyzers to be collocated at the PQAO level or the national level as they did with PM10 samplers.
Although the 24-hour primary NAAQS standard for PM10 is 150 micrograms per cubic meter (µg/m3),
due to rounding the 24-hour average concentration must exceed 155 µg/m3 to be considered an
“exceedance”. This NAAQS is violated when the expected number of exceedances at a monitor is
more than one per year on average over three years. The expected number of exceedances is estimated
using a formula provided in 40 CFR Part 50 Appendix K. The formula takes into account the number
of days sampling occurs and the number of valid samples that can be collected. A 3-year average of
these estimated days is then used to determine compliance. Effective December 18, 2006, EPA
revoked the PM10 annual primary standard; however, the annual average is still displayed below for
informational purposes (see Table 18).
In recent years, some PM10 exceedances occurring in the Maricopa County CBSA have been
successfully attributed to an EE. As per the EPA’s EER, an EE is considered to be an uncontrollable
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event that was caused by natural sources of pollution or an event that is not expected to recur at a given
location. ADEQ makes the determination of which events to classify as exceptional; then, they
develop and submit an EE petition to EPA for review and acceptance of the classification. If EPA
concurs with the petition, the PM10 concentrations measured during an EE are not used to determine
compliance with the NAAQS. The EE counts below are current as of this review’s publishing.
Table 18 shows the 2014 PM10 24-hour NAAQS status and data summary.
Table 18. 2014 PM10 24-Hour Data Summary
Site Name

Annual
Expected
24-hr
24-hr Avg.
24-hour
Weighted
nd
Avg.
2 Highest
NAAQS Exceedances
Average
3
3
Exceedances
Max (µg/m ) (µg/m )
(µg/m3)

Quantity
of EEs

Buckeye

271*

175*

2

2.0

43.4

1

Central Phoenix

182*

146

1

1.0

32.0

1

Durango Complex

172*

162*

2

2.0

42.1

2

Dysart

163*

138

1

1

26.7

1

Glendale

205*

102

1

1.011

27.4

1

Greenwood

208*

157*

2

2.011

44.0

2

Higley

179*

155*

2

2.0

34.8#

2

Mesa

155*

146

1

1.034

30.4

1

North Phoenix

199*

107

1

1.0

27.9

1

South Phoenix

170*

169*

3

3.0

40.6

3

South Scottsdale

193*

169*

2

2.045

31.0

2

Tempe

175*

140

1

1.011

28.7

1

West Chandler

163*

146

1

1.0

29.3

1

West 43rd Avenue

171*

141

1

1.0

45.9

1

West Phoenix

210*

165*

2

2.022

38.8

2

Zuni Hills

166*

86

1

1.247

24.0#

1

* Indicates an exceedance of the standard.
# Indicates that the mean does not satisfy summary criteria
Source: The EPA’s 2014 AQS AMP450 Report, aka “Quicklook Criteria Parameters Report”

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Additional information required by EPA is shown in Table 19.
Table 19. PM10 Data Required by EPA
CBSA

38060

County

Maricopa

Population
Max
& Census
Max
Concentration
Year
Concentration*
Site
(2012)
4,329,534

175 µg/m3

04-013-4011

Required
Monitors

Active
Monitors

Additional
Monitors
Needed

6-10

16

0

NOTE: Data exclude measurements submitted as EEs.

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Particulate Matter ≤2.5 Micrometers (PM2.5)

Figure 10. 2014 PM2.5 Monitoring Sites
Figure 10 shows the sites monitoring for PM2.5: Diablo, Durango Complex, Glendale, Mesa, North
Phoenix, South Phoenix, Tempe, and West Phoenix. The department operates eight continuous
Federal Equivalency Methods (FEM) PM2.5 analyzers, so data are applicable for comparison to the
NAAQS. All PM2.5 monitors are identified as SLAMS.
Beginning in January 2015, all PM2.5 primary monitors are FEMs; therefore, 2014 is the last year we
will report data from the West Phoenix FRM sampler for comparison to the NAAQS. At the end of
2014, the AMD reduced the quantity of FRM PM2.5 samplers in operation throughout the network from
two to one. The primary monitoring method at the West Phoenix station officially changed from an
FRM to an FEM beginning on January 1, 2015. The West Phoenix site remains our “collocated” site
for PM2.5, which means that we will operate one FEM continuous analyzer designated as “primary
monitor” and one FRM filter-based PM2.5 sampler designated as the “secondary monitor”. The
secondary monitor is required to meet the EPA’s QA collocation requirements for the PM2.5 network.
Although data from the secondary monitor are intended for QA usage, if necessary, they can be
substituted in place of the primary monitor’s data as per 40 CFR Part 50 Appendix N. This secondary
monitor will continue to collect a twenty-four hour, e.g., midnight-to-midnight, filter sample on the
designated 1:12 day as required for collocated QA samples. The EPA OAQPS produces the annual
sampling calendar each year and posts it on the AMTIC website.
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The PM2.5 network is smaller than the PM10 network, because, historically PM10 was of more concern
within Maricopa County due to EPA’s designation or nonattainment for PM10. Maricopa County is
currently in attainment for PM2.5; however, MCAQD continually assesses the existing network to
ensure it adequately represents air quality in Maricopa County in regards to PM2.5. According to
federal regulations, Maricopa County operates more than the required minimum number of PM2.5
monitors for the core-based statistical area (CBSA) as shown on Table 24 and in Appendix II. One
result from these ongoing assessments has been increasing resources for the PM2.5 network and
upgrading to continuous PM2.5 analyzers.
To determine compliance with the annual NAAQS, three years’ worth the of the 24-hour annual
average concentration at each site is used. To determine compliance with the 24-hour NAAQS, the
98th percentile concentration value from each PM2.5 monitoring station is used. To calculate the annual
and the 24-hour NAAQS, three consecutive years of data from an “eligible” site must be available.
Overall, an eligible site is one that meets the EPA’s operating and QA requirements. In addition, data
generated by different monitoring methods are not combined but kept separate, i.e., FRM sampler data
and FEM analyzer data are not averaged together when calculating outcomes.
2014 PM2.5 FRM Data Summary
Table 20 summarizes the 2014 data from the West Phoenix FRM sampler.
Table 20. 2014 PM2.5 3-Year 24-Hour and Annual Mean Averages for the FRM Sampler
Site Name

2014
24-hr Avg. Max
(µg/m3)

2014
24-hr Avg. 2nd High
(µg/m3)

2014
98th Percentile Value
(µg/m3)

2014
Annual Mean
(µg/m3)

West Phoenix

30.3

29.0

28.3

9.95

2014 PM2.5 FEM Data Summary
Table 21 summarizes the 2014 data from the FEM analyzers.
Table 21. 2014 PM2.5 3-Year 24-Hour Averages and Annual Means for FEM Analyzers
2014
24-hr Avg.
Max (µg/m3)
29.2

2014
24-hr Avg. 2nd
High (µg/m3)
26.2

2014
98th Percentile
Value (µg/m3)
21.4

2014
Annual Mean
(µg/m3)
#

Durango Complex

56.4*

30.7

24.1

10.12

Glendale

50.0*

30.1

18.6

7.73

Mesa

42.9*

26.8

19.4

8.28

North Phoenix

33.9

26.5

20.3

8.02

South Phoenix

101.7*

34.7

26.5

10.27

Tempe

44.0*

27.5

17.4

8.63

170.7*#

48.7*#

28.9#

11.13#

Site Name
Diablo

West Phoenix

* Indicates an exceedance of the standard.
# Indicates that the mean does not satisfy summary criteria
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The Annual PM2.5 NAAQS Status
Compliance with the annual NAAQS, both primary and secondary, is determined by averaging three
consecutive years of a site’s annual mean value which is derived using the 24-hour, or daily,
concentrations. The annual PM2.5 NAAQS is met when three-year annual average concentration is less
than or equal to 12.0 µg/m3 at each eligible monitoring site. All 3-year averages were below the
annual NAAQS.

FRM Data
Table 22 summarizes the 3-year, 24-hour annual average data from the FRM sampler at West Phoenix.

Table 22. PM2.5 FRM Sampler 3-Year Annual Averages
2012
2013
2014
3-Year
Annual Avg.
Annual Avg. Annual Avg.
Annual Avg.
Site Name
(µg/m3)
(µg/m3)
(µg/m3)
(µg/m3)
West Phoenix

12.02

10.16

9.95

10.71

FEM Data
Table 23 summaries the 3-year 24-hour annual average data from the FEM analyzers.
Table 23. PM2.5 FEM Analyzer 3-Year Annual Averages
2012
2013
2014
3-Year
Site Name
Annual Avg.
Annual Avg.
Annual Avg. Annual Avg.
(µg/m3)
(µg/m3)
(µg/m3)
(µg/m3)
Diablo

Not operating

Not operating

9.71#

#

Durango
Complex

11.57

10.54

10.12

10.74

Glendale

8.74

7.52

7.73

7.99

Mesa

5.84#

5.69

8.28

6.60#

North Phoenix

9.26

8.0

8.02

8.42

South Phoenix

9.24

9.59

10.27

9.70

Tempe

9.27#

8.69

8.63

8.86#

West Phoenix

10.42#

10.57#

11.13

10.70#

#Does not meet data completeness standards

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The 24-Hour PM2.5 NAAQS Status
Compliance with the primary and secondary 24-hour PM2.5 NAAQS is determined by averaging 3consecutive years of the 24-hour 98th percentile concentration values from all eligible sites. The 24hour NAAQS is met when 3-year average concentration values is less than or equal to 35 µg/m3. In
2014, there were three exceedance days, but no violations of the primary or secondary 24-hour
NAAQS of 35 µg/m3.
FRM Data
Table 24 summarizes the 3-year, 24-hour 98th percentile data from the FRM sampler at West Phoenix.
Table 24. PM2.5 3-Year 24-Hour Averages of the 98th Percentile for FRM Sampler
3-Year
2012
2013
2014
Average 98th
98th Percentile 98th Percentile 98th Percentile
Percentile
Site Name
(µg/m3)
(µg/m3)
(µg/m3)
(µg/m3)
West Phoenix

29.0

28.0

28.3

28.4

FEM Data
Table 25 summaries the 3-year 24-hour 98th percentile data from the FEM analyzers.
Table 25. PM2.5 3-Year 24-Hour Averages of the 98th Percentile for FEM Analyzers
3-Year
2013
2014
2012
Average 98th
Site Name
98th Percentile 98th Percentile 98th Percentile
Percentile
(µg/m3)
(µg/m3)
(µg/m3)
(µg/m3)
Not operating
Not operating
21.4#
#
Diablo
Durango Complex

24.9

27.2

24.1

25.4

Glendale

18.6

16.6

18.6

17.9

Mesa

10.4

12.8

19.4

14.2

North Phoenix

21.2

17.2

20.3

19.6

South Phoenix

20.9

25.8

26.5

24.4

Tempe

19.5

17.9

17.4

18.2

West Phoenix

23.6#

29.0#

28.9

27.2#

# Does not meet data completeness standards

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Additional information required by EPA is shown in Table 26.
Table 26. PM2.5 Data Required by EPA
CBSA

County

Population
& Census
Year (2012)

38060

Maricopa

4,329,534

Annual
Design
Value
(µg/m3)

Annual
Design
Value
Site

Daily
Design
Value
(µg/m3)

Daily
Design
Value
Site

Required
Monitors

Active
Monitors

Additional
Monitors
Needed

11.0

04-0130019

28

04-0130019

3

7

0

* - excludes measurements submitted as EE

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Sulfur Dioxide (SO2)

Figure 11. 2014 SO2 Monitoring Sites
Maricopa County is in attainment for SO2. During 2014, two SO2 SLAMS monitors were operational
and reported into AQS (see Figure 11). Sulfur dioxide has a 1-hour primary standard and a 3-hour
secondary standard. The 24-hour and annual average standards were revoked in a June 2010
rulemaking. A violation of the primary standard occurs when the 3-year average of the 99th percentile
of the daily maximum 1-hour average exceeds 75 ppb. A violation of the secondary standard occurs
when a 3-hour average of 500 ppb is exceeded more than once per year.
For calendar year 2014, no exceedances of the SO2 1-hour or 3-hour standard were recorded at
Maricopa County monitoring sites. The EPA now requires that the highest 5-minute average per hour
per day be reported to AQS; however, there is not a 5-minute SO2 NAAQS limit.
Table 27 shows the 2014 SO2 data summary.

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Table 27. 2014 SO2 Data Summary
1-hour Max.
(ppb)

1-hour 2nd High
(ppb)

1-hour
99th Percentile
(ppb)

Central Phoenix

11.0

8.0

7.0

Durango Complex

10.0

8.0

8.0

Site

NOTE: EPA no longer requires the reporting of 3-hour values for the SO2 secondary NAAQS.
Table 28 shows additional information required by EPA.
Table 28. SO2 Data Required by EPA
CBSA

County

Population
& Census
Year
(2012)

38060

Maricopa

4,329,534

Total SO2
Emitted in
2011
(tpy)

Population
Weighted
Emission
Index

Required
Monitors

Active
Monitors

Additional
Monitors
Needed

1468

N/A

0

2

0

Source: The EPA’s Clearinghouse for Inventories & Emissions Factors database

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2014 NAAQS Exceedance and Violation Summary
The following is a summary of the number, types, and dates of exceedances and violations of the
NAAQS for 2014 (see Table 29).
CO

Table 29. 2014 NAAQS Exceedances and Violation Summary
No exceedances or violations of the 1-hour or 8-hour NAAQS standard were
logged.

NO2

There was one day when one monitor exceeded the 1-hour standard for one
hour; there was no violation of the 1-hour NAAQS standard.

O3

There were eleven unique days when at least one monitor exceeded the
standard. There were three violations of the 8-hour standard.

Pb

No exceedances or violations of NAAQS were logged.

PM10

There were seven unique days when at least one monitor exceeded the 24-hour
standard. There were no sites that violated the standard once EEs were
removed.

PM2.5

There were three unique days when at least one monitor exceeded the 24-hour
standard. There were no violations of the 24-hour or annual standards.

SO2

No exceedances or violations of NAAQS were logged.

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2014 O3 Exceedance and Violation Information
Table 30 shows the dates and values for the primary and secondary 8-hour O3 NAAQS exceedances. The NAAQS limit is 0.075 ppm for a
rolling 8-hour average, and an exceedance occurs when the 8-hour average is greater than 0.075 ppm, e.g., 0.076 ppm or higher.
Table 30. 2014 O3 8-hour Average Exceedance Details
Ozone Exceedance Days 2014
9/26/2014

Ozone 8-hr avg. (ppm)
Ozone NAAQS > 0.075 ppm

Buckeye
5/28/14
6/5/14
6/6/14
6/7/14
6/9/14
7/7/14
7/14/14
7/28/14
9/11/14
9/12/14
9/25/14
Exceedance Days
Maximum Value
4th High Value>.075

Blue
Point

Cave
Creek
0.076

Central
Phoenix

0.088

0.081

0.077

Dysart

Falcon
Field

Fountain
Humboldt
Glendale
Hills
Mt.

0.078
0.088
0.076
0.078

0.076

0.078

0.080
0.082
0.077

0.079

0

2
0.088

2
0.081

1
0.077

0

4
0.088
0.076

0

2
0.079

Mesa
0.078
0.086
0.077
0.078

0.076
0.079

3
0.082

6
0.086
0.078

North Pinnacle
Peak
Phoenix

0.081

0.078
0.077
0.078
0.082

Rio
Verde

South
Phoenix

South
Scotts.

0.077
0.085

0.076
0.080

0.078

0.081
0.088
0.081
0.080

West
West
Tempe Chandler Phoenix

0.077

0.078

0.078

0.076

0.080

6
0.082
0.078

6
0.088
0.08

0.076
0.079
0.078

2
0.085

2
0.080

1
0.078

1
0.077

0

4
0.079
0.076

All sites are located in or near the Ozone Nonattainment Area
Please see ADEQ for information on additional statewide ozone sites
Total Number of Days where at least one monitor exceeded the
NAAQS Ozone Standard

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11

Table 31 shows the O3 NAAQS violations. A site violates the NAAQS when its 3-year average of the
4th-highest annual 8-hour concentration exceeds 0.075 ppm. Data shown below are the 2012 to 2014
3-year averages of the 4th highest 8-hour O3 concentrations.
Table 31. 2014 O3 NAAQS Violations
Site

Concentration (ppm)

North Phoenix

0.080

Pinnacle Peak

0.078

West Phoenix

0.078

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2014 Particulate Matter Exceedance and Violation Status
The 24-Hour PM10 NAAQS Exceedances
Table 32 shows the site and date of the 24-hour PM10 exceedances. Note that this table includes all
exceedances, even those that are expected to be or are in the process of being classified as EEs.
Exceptional event data are not used when calculating compliance with the NAAQS.
Table 32. 2014 PM10 24-hour NAAQS Exceedances
Site
Buckeye
Central Phoenix
Durango Complex
Dysart
Glendale
Greenwood
Higley
Mesa
North Phoenix
South Phoenix

South Scottsdale
Tempe
West 43rd Avenue
West Chandler
West Phoenix
Zuni Hills

24-hour avg. PM10
Concentration (µg/m3)
271
175
182
172
162
163
205
208
157
179
155
155
199
170
169
159
169
193
175
171
163
210
165
166

Date
07/03/14
10/30/14
05/11/14
05/11/14
07/25/14
05/11/14
05/11/14
05/11/14
07/03/14
07/08/14
09/04/14
07/25/14
05/11/14
05/11/14
07/25/14
09/06/14
05/11/14
07/25/14
07/25/14
05/11/14
07/25/14
05/11/14
07/03/14
05/11/14

Quantity of Days in 2014 where at least one
monitor exceeded the 24-hr PM10 Standard

Exceptional
Event
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

7

*MCAQD has flagged these exceedances as EEs.

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2014 24-Hour PM10 NAAQS Violation Status with Exceptional Events
Table 33 shows the violations of the 24-hour primary and secondary PM10 NAAQS. As per 40 CFR
Part 50.6 (a), a site violates the PM10 NAAQS when the calculated “rate of expected exceedances” is
>1 when averaged over three consecutive years.
Table 33. 2014 Violations of the PM10 24-hour NAAQS
with Only EE Data with EPA-Concurrence Excluded
2012

2013
Expected
Exceedances

Expected
Exceedances

Rate of
Expected
Exceedances

298‡

2.21

271‡

2.0

1.736

0

328‡

2

182‡

1.0

1.0

221‡

0

303‡

4.02

172‡

2.0

2.007

Dysart

167‡

0

147

0

163‡

1.0

0.33

Glendale

337‡

0

210‡

2

205‡

1.011

1.003

Greenwood

323‡

0

273‡

3.01

208‡

2.011

1.674

Higley

224‡

1.00

211‡

1

179‡

2.0

1.33

Mesa

64#

0

151

0

155‡

1.034

0.344

178‡

0

153

0

199‡

1.0

0.33

342‡

0

294‡

2.045

170‡

3.0

1.68

102

0

195‡

1.05

193‡

2.045

1.031

169‡

0

227‡

1

175‡

1.011

0.67

402

2.00

234‡

3.04

163‡

1.0

2.01

254‡

2.00

301‡

4.19

171‡

1.0

2.396

West Phoenix

189‡

1.0

255‡

2.03

210‡

2.022

1.684

Zuni Hills

285‡

0

165‡

1.011

166‡

1.247

0.752

Buckeye
Central
Phoenix
Durango
Complex

North
Phoenix
South
Phoenix
South
Scottsdale
Tempe
West
Chandler
West 43rd
Avenue

Expected
Exceedances

24-hr
Max.
(µg/m3)

205‡

1.00

340‡

2014
24-hr
Max.
(µg/m3)

Site

24-hr
Max.
(µg/m3)

# Indicates <75% data available, i.e., does not meet data completeness requirements
‡ Indicates value was flagged as an EE

NOTE: Only 2012 EE data with EPA concurrence were excluded in the calculations above. EPA has
yet to concur with the 2013 and 2014 EE demonstration submittals.

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2014 24-Hour PM10 NAAQS Violation Status without Exceptional Events
The ADEQ submitted EE packages to EPA R9 for the seven PM10 exceedance days that occurred in
2014 and the six exceedance days that occurred in 2013. If the EPA concurs with all of these
packages, the number of sites that violated the PM10 standard in 2014 will be zero (see Table 34).
Table 34. 2014 Violations of the PM10 NAAQS with All EE Data Excluded,
Regardless of EPA Concurrence
2012

2013

Expected
Exceedances
1.00

24-hr
Max.
(µg/m3)
112

117

0

124

2014

Expected
Exceedances
0

24-hr
Max.
(µg/m3)
175

Expected
Exceedances
1.00

Rate of
Expected
Exceedances
0.666

114

0

135

0

0

0

110

0

107

0

0

127

0

147

0

90

0

0

Glendale

136

0

90

0

86

0

0

Greenwood

145

0

119

0

125

0

0

Higley

136

1.00

143

0

137

0

0.333

Mesa
North
Phoenix
South
Phoenix
South
Scottsdale
Tempe
West
Chandler
West 43rd
Avenue
West
Phoenix
Zuni Hills

64#

0

151

0

101

0

0

140

0

153

0

107

0

0

134

0

118

0

109

0

0

90

0

142

0

98

0

0

107

0

146

0

88

0

0

402

2.00

144

0

146

0

0.666

174

2.00

121

0

121

0

0.666

148

1.00

114

0

148

0

0.333

147

0

80

0

86

0

0

Site
Buckeye
Central
Phoenix
Durango
Complex
Dysart

24-hr
Max.
(µg/m3)
205‡

# Indicates <75% data available, i.e., does not meet data completeness requirements
‡ Indicates value was flagged as an EE

NOTE: All 2012 – 2014 data considered to be the result of an EE have been excluded from the
calculations above, regardless of EPA concurrence status. EPA has yet to concur with the 2013 and
2014 EE demonstration submittals.

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The 24-Hour PM2.5 NAAQS Exceedances and Violation Status
The 24-hour primary and secondary NAAQS for PM2.5 is 35 µg/m3. If the 24-hour, midnight-tomidnight block-average concentration at a site is 35.1 µg/m3 or higher, then it is counted as an
exceedance. If the 24-hour 3-year average of the 98th percentile exceeds 35 µg/m3, then the 24-hour
NAAQS are violated. Table 35 shows there were three exceedance days in 2014 for PM2.5; but there
were no violations.

Site
South Phoenix

Table 35. 2014 PM2.5 Exceedances
24-hr Avg. PM2.5 Concentration
Date
(µg/m3)
01/01/14

102

01/01/14

171

07/04/14

49

12/07/14

38

Durango Complex

01/01/14

56

Glendale

01/01/14

50

Mesa

01/01/14

43

Tempe

01/01/14
01/01/14

44
63

West Phoenix

JLG Supersite (ADEQ)

Number of Days where at least one monitor
exceeded the 24-hour PM2.5 Standard

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Supplemental Exceptional Event Information
Recently, ADEQ began developing and submitting EE packages for PM2.5 to EPA R9 for review and
consideration. Most, if not all, of these submittals are for elevated PM2.5 concentrations in the Phoenix
metropolitan area that occurred during high wind events when elevated PM10 concentrations occurred
as well. For instance, the ADEQ recently submitted an EE package to EPA R9 for the July 17, 2012
exceedance day in January 2014. In addition, EE packages were submitted for the following
exceedance days: July 2-8, 2011, July 18, 2011, August 25 – 28, 2011, September 2, 2011, and June
27, 2012. Copies of EE submittals can be viewed online at ADEQ’s website.
Changes to the Criteria Pollutant Air Monitoring Networks
The MCAQD’s AMD strives to provide the most reliable and relevant air monitoring data to the
public. Air quality issues are diverse and controversial subjects for the citizens of Maricopa County.
High-quality monitoring data is a cornerstone of developing and implementing effective SIPs, EE
packages, and permits for new and existing sources. The following describes projects and changes that
have occurred during 2014.
Station and Site Reclassifications, Relocations, and/or Shutdowns
•

Zuni Hills (04-013-4016) – this site was temporarily shutdown because of construction in the
area from June 2014 to August 2014. Because the Zuni Hills’ PM10 monitor has been operating
for more than 24 months, its classification was converted from an SPM to a SLAMS as per
EPA protocol. This change was made in AQS effective January 1, 2015.

•

Fountain Hills (04-013-9704) – this site was temporarily shutdown from August 27, 2013
through May 14, 2014 due to remodeling of the firehouse complex, which houses the O3
station.

•

Higley site (04-013-4006) – this site was temporarily shutdown on November 4, 2014 due to
the property owner asking us to vacate the property. The owner was no longer able to provide
housing for the station. Therefore, we discontinued monitoring and decommissioned the site in
early November. Our plan is to establish a new site and monitoring station close enough to the
previous site that the same AQS site identification number can be used. We are targeting
startup by the end of 2015 or as soon as feasible.

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New Monitoring Sites
Near-Road NO2 Monitoring Stations
The EPA Near-road NO2 Monitoring Technical Assistance Document provides the procedures for
locating the near-road NO2 monitors. Important parameters for traffic activity that can be readily
obtained for near-road monitoring assessments include the number of vehicles, the fleet mix, vehicle
speeds (traffic congestion), local terrain and topography, and meteorology. Each of these parameters
affects the concentration and characteristics of the near-road pollutants. Per 40 CFR Part 58 Appendix
D, § 4.3.2.a, state and local ambient air monitoring agencies are required to assess what monitoring
may be required using the latest available U.S. Census data of population counts and/or estimates and
transportation agencies’ data of motor vehicle traffic metrics.
•

Site #1 “Diablo”

The Diablo site, which houses the first of two near-road monitoring stations, received EPA R9
approval in 2013 and opened in February 2014. The site, which is located near Interstate-10 (I-10) and
the Broadway Curve, was chosen because it has:
• a #1 rating in fleet-equivalency rank (a comparative rating including both light and heavy-duty
vehicles), #1 in average weekday traffic rank (AWT), and #3 in heavy-duty vehicle traffic;
• extreme traffic congestion;
• desirable supporting features such as highway orientation and surrounding grade;
• adjacent to commercial property with considerable residential parcels nearby;
• adequate safety, security, and power availability; and
• adequate accessibly due to the highway frontage land being owned by the Arizona Department
of Transportation (ADOT), who has granted access.
o ADOT is planning a major road-widening construction project from the U.S. 60/I-10 split
to the Interstate-17/I-10 split beginning in 2019. Based on discussions with ADOT
regarding site accessibility during construction, it appears that we will be able to move the
monitoring station back from the highway far enough to accommodate monitoring during
construction. If moving the station is not feasible, then we will have to prepare a site
relocation assessment. We believe other nearby locations adjacent to I-10 are suitable.
•

Site #2 “Thirty-Third”

For the second near-road site, a location was chosen near a high-density population source that does
not represent the same traffic as the Diablo site. The EPA R9 approved our proposal for the second
site’s location, which is just east of 33rd Avenue on the south side of the I-10 highway in an area just
past the soundwall. The secure monitoring shelter placement is within 10-20 meters of the road in the
middle of the grade (see Figure 12 and Figure 13). As of June 2015, the site’s construction is nearly
complete, and we are targeting August 2015 for air monitoring startup.
This location was the most desirable because it has:
• a #13 rating in fleet-equivalency rank, #17 in AWT traffic, and #12 in heavy-duty vehicle
traffic;
• extreme traffic congestion;
• many residential parcels nearby;
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•
•
•
•

favorable surrounding features and background NO2 sources;
adequate safety and security features that consist of the setback from the road, the grade of the
slope, and a block wall around the shelter;
adequate power supply; and,
adequate accessibly due to the highway frontage land being owned by ADOT, who has granted
access.

We proposed that the location’s positive aspects outweighed the negative, and features alongside this
road segment will allow access while avoiding the soundwalls. The site’s drawbacks include:
• an east-west orientation, which is parallel to the average predominate wind direction;
• the highway is approximately 20’ below grade;
• an overpass is located at 35th Avenue; and,
• soundwalls exist on some parts of the interstate.

Figure 12. Aerial View of Near-road Site #2

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Figure 13. Street View of Near-road Site #2

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Seasonal Air Monitoring
There are no changes requested for reducing year-round monitors to seasonal monitors or vice versa.
Currently, the AMD operates nine out of thirteen CO monitors on a seasonal basis (see Table 36).
During the off-season, the quantity of CO monitors operating still exceeds the EPA’s minimum
requirements. By operating the CO network seasonally, AMD can better perform instrument upgrades,
preventive maintenance that extends the life expectancy of the monitoring instruments while reducing
replacement costs, and QA/QC checks on the required year-round monitors.
Table 36. Seasonal Monitors
Seasonal CO Monitoring Sites
(Operational Sept. 1 – Apr. 1)
Buckeye
Dysart
Glendale
Mesa
North Phoenix
South Phoenix
South Scottsdale
Tempe
West Chandler

Daily Uses of Criteria Pollutant Data
Air Quality Forecasting
The ADEQ, in conjunction with MCAQD, has developed a year-round air quality forecasting
capability for the Phoenix metropolitan area. ADEQ takes the lead on air quality forecasting and the
issuing of High Pollution Advisories (HPA), while the MCAQD provides monitoring data and
designates No-Burn Days. In 2014, AMD continued to supply CP and meteorological data to the
ADEQ forecasters on a daily basis. In 2015, we began supplying CP and meteorological data to MAG
on a daily basis as well.
Maricopa County’s Air Monitoring Website
The department continued distributing 1-hour and 5-minute continuous CP data for the “Maricopa
County Interactive Pollution Map”. The website provides each pollutant’s concentrations as well as
AQI values. By having easy access to this information, the public can better plan their daily activities.
EPA’s AIRNow Website
The department continued distributing 1-hour and 5-minute continuous CP data for the EPA’s
AIRNow website, which serves the same purpose as that of the Maricopa County’s website.

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Information Regarding Maricopa County’s Supplementary Air Monitoring Programs
The Mobile Monitoring Program
The department received approval in late 2006 from the Maricopa County Board of Supervisors to start
a “mobile monitoring” program. This program enables us to better respond to emergencies affecting
air quality, to identify sources of air pollutants by performing localized air monitoring, and to collect
and analyze hazardous air pollutant (HAP) samples. In addition, the program allows us to assist the
Maricopa County Air Quality Compliance and Enforcement Division (MCAQCED) with the
investigation and enforcement of air pollution control regulations.
In 2014, the mobile monitoring unit responded to air quality emergencies throughout Maricopa County
such as heavy smoke from fires or toxic releases that threatened air quality (see Figure 14). By
request, we responded to air quality concerns at an industrial source in Pinal County. All mobile
monitoring personnel are required to meet medical monitoring and “hazwoper” training as per the U.S.
Occupational Safety and Health Administration (OSHA) requirements found in 29 CFR 1910.120.
Members are recertified annually through refresher training.

Figure 14. 2014 Mulch Fire
Superbowl 2015
Phoenix hosted the National Football League’s 49th Superbowl on February 1, 2015. The MCAQD
was involved with the planning of safety and security for the games as well as other Superbowl events
and activities scheduled in Glendale and downtown Phoenix. In 2014, activities primarily included
attending Superbowl planning meetings and developing an air monitoring plan for public’s safety and
security. More information concerning our activities will be included in the next year’s AMNP,
because the Superbowl occurred in February 2015.

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Rapid Response Notification System (RRNS)
Maricopa County enjoys many days with clean air. However, there are several days during the year
when air pollution levels approach or exceed the NAAQS for PM10, PM2.5, or O3. The MCAQD’s
robust ambient air monitoring system identifies when a significant amount of air pollution is building
up. High CP pollution can cause immediate health impacts to County’s residents and visitors and
threaten our NAAQS attainment status. Therefore, MCAQD uses the RRNS to disseminate
information regarding a developing situation to employees, stakeholders, and/or customers.
The RRNS serves as a tool to manage high pollution events using a three-part system:
1. dissemination of as near real-time as possible air quality data to the community;
2. a notification system to alert MCAQD personnel, stakeholders, and customers of a pollution
problem; and,
3. onsite response from department inspectors and stakeholders to identify and discourage
pollution activity and to reduce the risk of pollution impacts.
For PM10 and PM2.5, concentrations can buildup quickly due to a high wind speed or a fire,
respectively. Overall, curtailing PM pollution from natural events is challenging; it requires advanced
planning and implementation of control mechanisms to reduce the likelihood of an exceedance.
However, anthropogenic activities that cause high PM concentrations near a site can often be
addressed. If a quickly-developing PM event is not addressed, it could result in a NAAQS exceedance
that may have been avoidable.
The AirVision™ database is programmed to trigger alerts for elevated PM10 five-minute and hourly
concentrations, and high PM2.5 five-minute concentrations. Immediately following an hourly or fiveminute PM concentration surpassing an internally imposed notification limit, a high importance alert is
sent out via email, text, and/or telephone. The MCAQD requests dust control permit holders inspect
their sites as soon as possible and employ Best Available Control Measures to stabilize all disturbed
soils to reduce blowing dust following the notification. The MCAQCED inspectors also review the
data and current circumstances, make site visits, or take other appropriate actions to help stop PM
concentrations from increasing. To better expedite response actions, meteorological data such as wind
speed and direction are also available in five-minute increments.
Overall, there are little to no immediate actions that can be taken to reduce high concentrations of
gaseous CPs. Currently, there are no RRNS triggers established for gaseous pollutants. In general,
gaseous pollutant concentrations are decreased through planning and implementing long-term emission
controls on sources. Depending on local sources of gaseous pollutants, it may be feasible to have a
source stop operating at such times to reduce emissions. For instance, SO2 is prone to spiking during
certain industrial activities, and at such a time, temporarily shutting down an operation may be a viable
control measure. Although a short-term increase or spike may occur for a particular gas, we rarely see
them unless they are associated with out-of-the-ordinary activities near the site.

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Emergency Response
The MCAQD is equipped to respond to air quality emergencies throughout Maricopa County, such as
heavy smoke from fires or air toxic releases that threaten air quality. All division personnel are trained
and use U.S. EPA and/or OSHA approved health and safety guidelines during hazardous materials and
emergency response situations. Response team members are required to meet OSHA 29 CFR
1910.120 medical monitoring and training requirements. Members remain current through annual
recertification.
In responding to emergencies, MCAQD has a wide variety of specialized equipment to assess air
quality and meteorological conditions. These include several specially-equipped trailers and a large
self-powered van equipped with CP monitors and meteorological instruments. In addition, AMD has
purchased several portable monitors, including a FTIR to monitor air toxics and an Area-Rae system to
monitor chlorine and ammonia.
When emergencies such as fires, chemical spills, or pipeline breaches occur, the air in the surrounding
community can be adversely affected. The fire department with jurisdiction over the area is the
designated authority to respond and mitigate such incidents. Most, if not all of the fire departments
serving the metropolitan area have hazmat units and are prepared to identify and monitor for toxic
chemicals resulting from the incident. Typically, the fire department’s mission is to monitor the air
until the incident is under control, which may take several hours. The MCAQD’s response may
provide backup to and continuation of the fire department’s monitoring efforts. Our intention is to
provide monitoring during and following an incident to ensure air quality impacts are addressed. This
continued monitoring allows us to provide a higher level of care and assurance to our population. The
results of the study are being forthcoming.

PM2.5 Speciation Monitoring
Occasionally, the AMD operates PM2.5 speciation monitors at certain monitoring sites. Sampling
locations and duration vary from year-to-year, depending on prior data findings, current air monitoring
needs, and resources availability. Speciation samples are used to identify select chemical components
of PM2.5, which may help to identify PM2.5 sources as well. Speciation samples have been collected
from midnight-to-midnight using the Met One SuperSASS™ samplers. An EPA-contracted
commercial laboratory that supports the Chemical Speciation Network (CSN) prepares the pre-exposed
filter for sampling and analyzes the filter samples following collection.
In late 2014, we conducted a special study at the Durango Complex and West Phoenix sites. These
sites were chosen because of population density and/or a history of being prone to elevated
concentrations of fine particulates. We collaborated with ADEQ’s Air Monitoring Unit, who
supported the study by temporarily loaning us a SuperSASS™ and by collecting additional samples at
JLG Supersite, which is an official CSN site. The days monitored were: Thanksgiving Eve and Day,
Christmas Eve and Day, and New Year’s Eve and Day.

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Information Regarding Additional Air Monitoring within Maricopa County
The ADEQ operates its own air monitoring surveillance system within the State of Arizona, which
includes the JLG Supersite in central Phoenix. The JLG Supersite is part of the national air monitoring
surveillance system, and CP data are collected at this site. In addition, ADEQ collects air quality data
for research programs at both the JLG Supersite and MCAQD’s South Phoenix site. These research air
monitors are primarily geared toward a variety of EPA-required air pollution trends research programs.
Specifically, ADEQ performs air monitoring in Maricopa County for the Chemical Speciation
Network (CSN), the Interagency Monitoring of Protected Visual Environments (IMPROVE), the
National Air Toxics Trends Stations (NATTS), the National Core multi-pollutant monitoring stations
(NCORE), the Photochemical Assessment Monitoring Stations (PAMS), the Urban Air Toxics
Monitoring Program (UATMP). They also operate visibility cameras and meteorological monitors
within the County. Occasionally, ADEQ may temporarily use other sites for special projects.
For more information about ADEQ’s network, consult their annual network plan located on the ADEQ
website.

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REFERENCES

1. eCFR Title 40, Parts 50, 53, and 58
2. EPA’s AirData (AQS) information: http://www.epa.gov/airdata
3. EPA’s NAAQS Info: http://www.epa.gov/ttn/naaqs/criteria.html
4. SIP Information: http://www.azdeq.gov/environ/air/plan/index.html
5. EPA Region 9 Air Program Information: http://www.epa.gov/region9/air/index.html
6. Maricopa County Air Quality Map: http://alert.fcd.maricopa.gov/alert/Google/v3/air.html
7. AirNow: http://airnow.gov/
8. Criteria Pollutant Information: http://www3.epa.gov/airquality/urbanair/
9. Maricopa County Air Quality Department Prior Network Reviews:
http://www.maricopa.gov/aq/divisions/monitoring/network.aspx
10. Arizona Department of Environmental Quality Natural and Exceptional Events:
https://www.azdeq.gov/environ/air/plan/nee.html

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APPENDIX I –2014 AIR MONITORING DATA BY SITE

Site information includes: photographs, site type and spatial scale,
and population represented.

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Blue Point (BP) (04-013-9702)
Location: Bush Highway and
Usery Pass Rd., Maricopa
County
Spatial Scale: Urban
Monitoring Objective: Maximum
Ozone Concentration

Site Description: The Blue Point site became operational in July 1995 and is located in a Maricopa
County Sheriff’s Sub-Station in Tonto National Forest. This site represents the maximum O3
concentration and urban-scale downwind transport conditions. This site is located approximately 40
miles east of the Phoenix metropolitan area. This SLAMS location monitors for O3. Meteorological
monitors operating at this site include: ambient temperature and wind speed/direction.

Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 (ppm)
O3 3-year average of 4th High (ppm)

2012
0.079*

2013
0.077*

2014
0.088*

10

3

2

0.075

0.077#

0.075

*Indicates an exceedance of the standard
#Indicates a violation of the standard

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Buckeye (BE) (04-013-4011)
Location: US 85 & MC 85,
Buckeye
Spatial Scale: Neighborhood and
Urban (NO2)
Monitoring Type: Population
Exposure

Site Description: The Buckeye site was established on August 1, 2004. The site is located in the
Maricopa County Department of Transportation - Southwest Facility. The immediate area is
agriculture and encroaching residential development. This SLAMS location monitors for CO
seasonally, NO2, O3, and PM10. Meteorological monitors operating at this site include: ambient
temperature, barometric pressure, relative humidity, and wind speed/direction.

CO

NO2

O3

PM10

2012
0.5

2013
0.4

2014
0.6

0

0

0

Annual NO2 Avg. (ppb)

9.4

8.42

8.65

NO2 1-hour Ave. 98th Percentile (ppb)

39.0

40.0

37.0

Max. 8-hr O3 Avg. (ppm)

0.078

0.062

0.068

1

0

0

O3 3-year Avg. of 4th High (ppm)

0.066

0.065

0.062

Max. 24-hr PM10 Avg. (µg/m3)

205*‡

298*‡

271*‡

2

2

2

47.4

40.8

43.4

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO

O3 #Daily Exceedances >0.075

Number exceedances 24-hr PM10
3

Annual PM10 Avg. (µg/m )
*Indicates an exceedance of the standard
‡Indicates EE at this site - listed value is the highest official current AQS reading.

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Maricopa County Air Quality Department

Cave Creek (CC) (04-013-4008)
Location: 32nd St. & Carefree
Highway, Cave Creek
Spatial Scale: Urban
Monitoring Type: Maximum
Ozone Concentration

Site Description: The Cave Creek site became operational in August 2001 and is located in the
Maricopa County Cave Creek Recreation Area (Park Office). This site was chosen through
discussions on modifying the O3 network for the 2005 8-hr O3 standard. This SLAMS location
monitors for O3 only. Meteorological monitors operating at this site include: ambient temperature,
barometric pressure, rain, relative humidity, and wind speed/direction.

Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 (ppm)
O3 3-year average of 4th High (ppm)

2012

2013

2014

0.081*

0.076*

0.081*

10

1

2

0.077#

0.077#

0.074

*Indicates an exceedance of the standard
#Indicates a violation of the standard

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Maricopa County Air Quality Department

Central Phoenix (CP) (04-013-3002)
Location: 19th St. and Roosevelt
Spatial Scale: Neighborhood
Monitoring Type: High Population
Exposure and Highest
Concentration (NO2 and SO2)

Site Description: The Central Phoenix site has been in existence for over four decades and has
provided a long-term historical database with a high rate of data recovery. The site is representative of
high population exposure (greater than 5000 people per square mile) in the central Phoenix area. This
SLAMS location monitors for CO, PM10, NO2, O3, and SO2. Meteorological monitors operating at this
site include: ambient temperature, barometric pressure, and wind speed/direction.

CO
NO2
O3

PM10

SO2

2012
2.7
0
21.2
63.0
0.084*
6
0.074
340*‡
1
37.9
3.4
0
1.2

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Annual NO2 Avg. (ppb)
NO2 1-hour Average 98th Percentile (ppb)
Max. 8-hr O3 Avg. (ppm)
O3 #Daily Exceedances >0.075 ppm
O3 3-year avg. of 4th High (ppm)
Max. 24-hr PM10 Avg. Continuous (µg/m3)
Number exceedances Continuous 24-hr PM10
Annual PM10 Avg. Continuous (µg/m3)
SO2 1-hour 99th Percentile (ppb)
Number of Exceedances SO2
Annual SO2 Avg. (ppb)

2013
2.1
0
19.71
60
0.079*
3
0.075
328*‡
2
31.8
8.0
0
1.19

2014
2.5
0
17.97
57.0
0.077*
1
0.074
182*‡
1
32.0
7.0
0
3.3

*Indicates an exceedance of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.

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Maricopa County Air Quality Department

Deer Valley (DV) (04-013-4018)
Location: 7th Avenue & Deer
Valley Rd.
Spatial Scale: Middle
Monitoring Type: Source-oriented

Site Description: The Deer Valley site is located on the grounds of the Deer Valley Airport in north
Phoenix. This site was started in July 2010, because changes in the Pb NAAQS necessitated that
MCAQD begin Pb monitoring once again. All ambient Pb monitoring had been discontinued in 1997,
because concentrations were consistently much lower than the NAAQS at that time. The source of Pb
emissions is the general aviation fuels used in the propeller-driven aircraft, and Deer Valley Airport is
one of the busiest general aviation airports in Maricopa County. This SLAMS location monitors for
Pb only. Meteorological monitors operating at this site include: ambient temperature, barometric
pressure, relative humidity, and wind speed/direction.

3

Max. 24-hr Pb Avg. (µg/m )
Pb

Pb #Daily Exceedances >0.15µg/m3
Pb Maximum 3-month Rolling Quarterly Average
(µg/m3)

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2012

2013

2014

0.057

0.071

0.087

0

0

0

0.0398

0.04

0.05

Maricopa County Air Quality Department

Diablo (DI) (04-013-4019)
Location: Fairmont Dr. & Diablo
Way
Spatial Scale: Micro
Monitoring Type: Source-oriented

Site Description: The Diablo site was the first near-road air monitoring site established by MCAQD
on the west side of the I-10 highway just south of the Fairmont/Diablo Way intersection. There is a
concrete barrier between the highway and the frontage road, offering safety, and we have erected a
secure shelter for housing the monitoring instruments. In February 2014, we began reporting CO and
NO2 data, with PM2.5 data soon following in May 2014. This SLAMS location monitors for CO, NO2,
and PM2.5. Meteorological monitors operating at this site include: ambient temperature, relative
humidity, and wind speed/direction.
2012
CO
NO2

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO

2014
1.4
0

Annual NO2 Avg. (ppb)

20.85

th

NO2 1-hr Average 98 Percentile (ppb)
Max. 24-hr PM2.5 Avg. (µg/m3)

59.0
N/A

No. of daily PM2.5 exceedances
PM2.5

2013

N/A

29.2+
0

Annual PM2.5 Avg. (µg/m3)

9.71+

98th Percentile PM2.5 Value (µg/m3)

21.4+

+Represents <75% of a data completeness due to May startup (238 daily observations in 2014)

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Maricopa County Air Quality Department

Durango Complex (DC) (04-013-9812)
Location: 27th Ave and Durango St.
Spatial Scale: Middle
Monitoring Type: Highest
Concentration

Site Description: This site is located in the Maricopa County Flood Control District storage yard.
Sampling began on January 6, 1999 with the intent to replace the old maximum highest concentration
site. However, in 2000 the EPA determined that the site is not equivalent to that old site, which
prompted the establishment of a new highest concentration site (West 43rd). This SLAMS location
monitors for PM10, PM2.5, and SO2. Meteorological monitors operating at this site include: ambient
temperature, barometric pressure, relative humidity, and wind speed/direction.
2012

2013

2014

221*‡

303*‡

172*‡

4

4

2

Annual PM10 Avg. Continuous (µg/m3)

49.1

40.1

42.1

Max. 24-hr PM2.5 Avg. (µg/m3)

74.4*

66.9*

56.4*

No. of daily PM2.5 exceedances

2

3

1

Annual PM2.5 Avg. (µg/m3)

11.6

10.54

10.12

98th Percentile PM2.5 Value (µg/m3)

24.9

27.2

24.1

SO2 1-hour 99th Percentile (ppb)

NA

9.0

8.0

0

0

0

1.5

1.15

0.87

3

Max. 24-hr PM10 Avg. Continuous (µg/m )
PM10

PM2.5

SO2

Number exceedances Continuous 24-hr PM10

Number of Exceedances SO2
Annual SO2 Avg. (ppb)

*Indicates an exceedance of the standard

‡Indicates EEs at this site
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Maricopa County Air Quality Department

Dysart (DY) (04-013-4010)
Location: Bell Rd. & Dysart Rd.,
Surprise
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The Dysart site was established in July 2003. It is located at the Maricopa County
Facility Maintenance Yard at the corner of Bell Rd. and Dysart Rd. The site is in a growing population
area in the northwest valley. The land use around the site consists of subdivisions of single family
homes, commercial, and industrial. The location is approximately one mile west of the Agua Fria
riverbed. This SLAMS location monitors for CO seasonally, O3, and PM10. Meteorological monitors
operating at this site include: ambient temperature, barometric pressure, relative humidity, and wind
speed/direction.
2012

2013

2014

0.6

0.7

0.6

0

0

0

0.079*

0.075

0.075

2

0

0

O3 3-year Avg. of 4th High (ppm)

0.071

0.072

0.072

Max. 24-hr PM10 Avg. (µg/m3)

167*‡

147

163*‡

1

0

1

30.0

24.9

26.7

Max. 8-hr CO Avg. (ppm)
CO
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)
O3

PM10

O3 #Daily Exceedances >0.075 ppm

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

*Indicates an exceedance of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.

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Maricopa County Air Quality Department

Falcon Field (FF) (04-013-1010)
Location: Greenfield and
McKellips
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: Monitoring began in June of 1989. The site is located at a fire station near an
airfield within a growing residential area. This SLAMS location monitors for O3 only. Meteorological
monitors operating at this site include: ambient temperature, relative humidity, and wind
speed/direction.

Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 ppm
O3 3-year avg. of 4th High (ppm)

2012

2013

2014

0.075

0.082*

0.088*

0

5

4

0.069

0.072

0.074

*Indicates an exceedance of the standard

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Maricopa County Air Quality Department

Fountain Hills (FH) (04-013-9704)
Location: Fountain Hills Blvd. and
Palisades Blvd.
Spatial Scale: Neighborhood
Monitoring Type: Maximum Ozone
Concentrations

Site Description: The site is located at a Fountain Hills fire station, and it became operational in April
of 1996. The site is located approximately 15 miles downwind from the Phoenix metropolitan area
and represents the high downwind O3 concentrations on the fringes of the central basin district along
the predominant summer/fall daytime wind direction. The site was shutdown from August 27, 2013
through May 14, 2014 for complex renovation. This SLAMS location monitors for O3 only.
Meteorological monitors operating at this site include: ambient temperature, barometric pressure,
relative humidity, and wind speed/direction.

Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 ppm
O3 3-year avg. of 4th High (ppm)

2012

2013

2014

0.083

0.072@

0.075@

5

0

0

0.076#

0.074@

0.071@

*Indicates an exceedance of the standard
#Indicates a violation of the standard
@ = <75% data completeness (223 valid daily observations in 2014)

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Maricopa County Air Quality Department

Glendale (GL) (04-013-2001)
Location: 59th Ave. and Olive Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The site is located on the grounds of Glendale Community College in a populous
residential area. Homes, various strip malls, food establishments, and parks surround the site. This
SLAMS location monitors for CO seasonally, O3, PM10, PM2.5. Meteorological monitors operating at
this site include: ambient temperature, barometric pressure, relative humidity, and wind
speed/direction.
2012
1.3

2013
1.6

2014
1.4

0

0

0

0.088*

0.077*

0.079*

4

2

2

0.076#

0.076#

0.074

337*‡

210*‡

205*‡

1

2

1

34.1

27.5

27.4

Max. 24-hr PM2.5 Avg. (µg/m )

66.1*

90.0*

50.0*

No. of daily PM2.5 exceedances

2

1

1

8.7

7.52

7.73

98 Percentile Value (µg/m )
18.6
*Indicates an exceedance of the standard
#Indicates a violation of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.

16.6

18.6

CO

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)

O3

O3 #Daily Exceedances >0.075 ppm
th

O3 3-year avg. of 4 High (ppm)
3

Max. 24-hr PM10 Avg. (µg/m )
PM10

Number exceedances 24-hr PM10
3

Annual PM10 Avg. (µg/m )
3

PM2.5

3

Annual PM2.5 Avg. (µg/m )
th

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Page 86 of 139

Maricopa County Air Quality Department

Greenwood (GR) (04-013-3010)
Location: 27th Ave. and I-10,
Phoenix
Spatial Scale: Middle
Monitoring Type: Population
Exposure

Site Description: Monitoring began at this site in December 1993. The station is bordered by I-10,
homes, and the Greenwood Cemetery. Interstate-17 is approximately one mile to the east of the site.
This SLAMS location monitors for CO, NO2, and PM10. Meteorological monitors operating at this site
include: ambient temperature, barometric pressure, and wind speed/direction.
2012

2013

2014

3.2

2.5

2.6

0

0

0

Annual NO2 Avg. (ppb)

26.0

24.58

24.55

NO2 1-hour Average 98th Percentile (ppb)

65.0

64.3

64.0

323*‡

273*‡

208*‡

2

3

2

45.3

41.5

44.0

Max. 8-hr CO Avg. (ppm)
CO
Number exceedances 8-hr CO
NO2

Max. 24-hr PM10 Avg. (µg/m3)
PM10

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

*Indicates an exceedance of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.

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Maricopa County Air Quality Department

Higley (HI) (04-013-4006)
Location: Higley Rd. and Williams
Field Rd., Gilbert
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: Originally, in 1994, ADEQ set-up this site to monitor for background particulate
concentrations near the urban limits of Maricopa County. Since then, urban expansion has enveloped the site, so
it no longer serves its original intended purpose. The AMD has monitored for PM10 since the second quarter of
2000. This is a neighborhood scale station with a monitoring type of high population exposure. The Roosevelt
Water District asked us to remove the site from their property by end 2014, because they could no longer house
the station. The station was shutdown on November 4, 2014, prior to a new location being identified and
approved by EPA. The AMD plans on relocating the station to a nearby location as soon as possible. This
SLAMS location monitored for PM10 only. Meteorological monitors operating at this site included: ambient
temperature, barometric pressure, and wind speed/direction.

3

Max. 24-hr PM10 Avg. (µg/m )
PM10

2012

2013

2014

224*‡

211*‡

179*‡

4

1

2

38.3

34.6

34.8

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

*Indicates an exceedance of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading

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Maricopa County Air Quality Department

Humboldt Mountain (HM) (04-013-9508)
Location: Humboldt Mountain
Summit
Spatial Scale: Regional
Monitoring Type: Maximum Ozone
Concentrations

Site Description: This site became operational in August 1995. The Humboldt Mountain site is
located on Federal Aviation Agency property, in a National Forest Service building within the Tonto
National Forest. This site is located approximately 40 miles north-northeast of the Phoenix
metropolitan area at an elevation of 5190 feet. This SLAMS location monitors for O3 only.
Meteorological monitors operating at this site include: ambient temperature and relative humidity.

Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 ppm
O3 3-year avg. of 4th High (ppm)

2012

2013

2014

0.082*

0.078*

0.082*

10

1

3

0.075

0.076#

0.075

*Indicates an exceedance of the standard
#Indicates a violation of the standard

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Maricopa County Air Quality Department

Mesa (ME) (04-013-1003)
Location: Broadway Rd. and
Brooks Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: This site is located at the City of Mesa - Brooks Reservoir, which is centered in an
area that contains residential, commercial, and industrial properties. In December 2012, following a
ten-month site construction by the City of Mesa, the site began operation again with new continuous
PM10, PM2.5, and O3 monitors. This SLAMS location monitors for CO seasonally, O3, PM10, and
PM2.5. Meteorological monitors operating at this site include: ambient temperature, barometric
pressure, relative humidity, and wind speed/direction.

CO

O3

PM10

2012

2013

2014

1.4
0

1.2
0

4.2
0

Did not operate
Did not operate
Did not operate
64
0#
22.8

0.086*
6
NA
151
0
28.8

0.086*
6
NA
155*‡
1
30.4

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)
O3 #Daily Exceedances >0.075 ppm
O3 3-year avg. of 4th High (ppm)
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

Max. 24-hr PM2.5 Avg. (µg/m3)
23.3 (16.0)
(31.9)
33.9
Number of Daily PM2.5 Exceedances
0@
0
0
PM2.5
3
Annual PM2.5 Avg. (µg/m )
8.5@ (5.8)@
(5.69)
8.02
th
3
98 Percentile PM2.5 Value (µg/m )
23.3@ (10.4)@
(12.8)
20.3
*Indicates an exceedance of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.
#Indicates a violation of the standard
@ = <75% data completeness
NOTE: For 2012 and 2013, the first PM value is from a 24-hour filter sample; the second value shown in parenthesis is
from a continuous monitor.

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Maricopa County Air Quality Department

North Phoenix (NP) (04-013-1004)
Location: 7th St. and Butler Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: This site is located in the Sunnyslope area of North Phoenix. The site is surrounded
by residential and commercial properties. This SLAMS location monitors for CO seasonally, O3, and
PM10, PM2.5. Meteorological monitors operating at this site include: ambient temperature, delta T
(temperature inversion), barometric pressure, solar radiation, and wind speed/direction.

CO

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)

O3

PM10

PM2.5

O3 #Daily Exceedances >0.075 ppm
3-year Avg. of 4th High (ppm)
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2.5 Avg. (µg/m3)
Number of Daily Exceedances
Annual PM2.5 Avg. (µg/m3)
98th Percentile Value (µg/m3)

2012
1.5
0

2013
1.3
0

2014
1.4
0

0.091*
10
0.081#
178*‡
1
32.4
30.1
0
9.3
21.2

0.080*
7
0.081#
151
0
28.8
57.3*
1
8.00
17.2

0.082*
6
0.080#
199*‡
1
27.9
33.9
0
8.02
20.3

*Indicates an exceedance of the standard
#Indicates a violation of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.

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Maricopa County Air Quality Department

Pinnacle Peak (PP) (04-013-2005)
Location: Alma School & Happy
Valley Rd.
Spatial Scale: Urban
Monitoring Type: Maximum Ozone
Concentrations

Site Description: The site is located in a geographic area of low-density population (less than 2500
people per square mile). In the current and previous years, O3 exceedances have been recorded due to
transport of O3 and precursors from more urbanized areas of metropolitan Phoenix. This SLAMS
location monitors for O3 only. Meteorological monitors operating at this site include: ambient
temperature, barometric pressure, relative humidity, and wind speed/direction.
Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 ppm
O3 3-year Avg. of 4th High (ppm)

2012

2013

2014

0.082*

0.080*

0.088*

6

5

6

0.077#

0.077#

0.078#

*Indicates an exceedance of the standard
#Indicates a violation of the standard

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Maricopa County Air Quality Department

Rio Verde (RV) (04-013-9706)
Location: Forest Rd. and Del Ray
Ave.
Spatial Scale: Urban
Monitoring Type: Maximum Ozone
Concentrations

Site Description: This site has been in operation since the spring of 1997. The monitor is located at
the fire station / County Sheriff’s Office Sub-Station located in a residential area surrounded by the
desert of Tonto National Forest. The site is on the edge of a Class I Wilderness Area. This SLAMS
location monitors for O3 only. No meteorological monitors operate at this site.

Max. 8-hr O3 Avg. (ppm)
O3

O3 #Daily Exceedances >0.075 ppm
O3 3-year Avg. of 4th High (ppm)

2012

2013

2014

0.076*

0.074

0.085*

2

0

2

0.074

0.075

0.072

*Indicates an exceedance of the standard

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Maricopa County Air Quality Department

South Phoenix (SP) (04-013-4003)
Location: Central Ave. and
Broadway Rd.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The site has operated at its current location since October 1999. The site borders a
mixture of high population density residential and commercial properties. This SLAMS location
monitors for CO seasonally, O3, PM10, and PM2.5. Meteorological monitors operating at this site
include: ambient temperature, barometric pressure, relative humidity, and wind speed/direction.

CO

2012
2.3

2013
2.3

2014
2.0

0

0

0

0.087*

0.081*

0.080*

5

3

2

O3 3-year Avg. of 4 High (ppm)

0.076#

0.076#

0.075

Max. 24-hr PM10 Avg. (µg/m3)

342*‡

294*‡

170*‡

3

2

3

47.9

38.6

40.6

70.0* (70.8)

(97.3*)

101.7*

2

4

1

Annual PM2.5 Avg. (µg/m )

11.5 (9.2)

(9.59)

10.27

98th Percentile PM2.5 value (µg/m3)

24.4 (20.9)

(25.8)

26.5

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)

O3

O3 #Daily Exceedances >0.075 ppm
th

PM10

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
3

Max. 24-hr PM2.5 Avg. (µg/m )
PM2.5

Number of Daily PM2.5 Exceedances
3

*Indicates an exceedance of the standard
#Indicates a violation of the standard
‡Indicates EEs at this site

NOTE: For 2012 and 2013, the first value is from a 24-hour filter sample; the second value shown in
parenthesis is from continuous monitor.
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Maricopa County Air Quality Department

South Scottsdale (SS) (04-013-3003)
Location: Thomas Rd. and Miller
Rd.
Spatial Scale: Neighborhood,
Urban (NO2)
Monitoring Type: Population
Exposure

Site Description: The South Scottsdale site is located at a City of Scottsdale fire station. The area surrounding the site is residential with a density of 2500 to 5000 persons per square mile. Previously, SO2
was monitored, but was discontinued in 2010 due to extremely low values being recorded. The SO2
monitor was moved the Durango Complex site, which is closer to SO2 point-sources. The NO2
monitoring was discontinued in 2011. This SLAMS location monitors for CO seasonally, O3, and
PM10. Meteorological monitors operating at this site include: ambient temperature, barometric
pressure, relative humidity, and wind speed/direction.

CO
NO2
O3

PM10

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Annual NO2 Avg. (ppb)
NO2 1-hour Average 98th Percentile (ppb)
Max. 8-hr O3 Avg. (ppm)
O3 #Daily Exceedances >0.075 ppm
O3 3-year Avg. of 4th High (ppm)
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2012
1.3
0
Shutdown
Shutdown
0.086*
7
0.077#
102
0
31.6

2013
1.4
0
Shutdown
Shutdown
0.079*
2
0.076#
195*‡
1
26.0

2014
1.4
0
Shutdown
Shutdown
0.078*
1
0.075
193*‡
2
31.0

*Indicates an exceedance of the standard
#Indicates a violation of the standard
‡Indicates EEs at this site

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Maricopa County Air Quality Department

Tempe (TE) (04-013-4005)
Location: Apache Blvd. & College
Ave.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: The site was established in 2000 and is located near the ASU Tempe Campus. The site is
surrounded by residential homes, some high-density residential properties, and a railroad track. In spring 2015,
the site was temporarily shutdown due to the owner, Arizona Public Service – a power provider, needing to
make infrastructure upgrades to the site. This SLAMS location monitors for CO seasonally, O3, PM10, and
PM2.5. Meteorological monitors operating at this site include: ambient temperature, delta T (temperature
inversion), rain, and wind speed/direction.

CO
O3

PM10

PM2.5

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)
O3 #Daily Exceedances >0.075 ppm
O3 3-year Avg. of 4th High (ppm)
Max. 24-hr PM10 Avg. (µg/m3)
Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)
Max. 24-hr PM2.5 Avg. (µg/m3)
Number of Daily PM2.5 Exceedances
Annual PM2.5 Avg. (µg/m3)
98th Percentile PM2.5 Value (µg/m3)

2012
1.6
0
0.078*
1
0.070
169*‡
1
31.6
23.1
0
9.27
19.5

2013
1.3
0
0.077*
1
0.071

227*‡
1
28.3
51.1*
1
8.69
17.9

2014
1.4
0
0.077*
1
0.071
175*‡
1
28.7
44.0*
1
8.63
17.4

*Indicates an exceedance of standard
#Indicates a violation of the standard
‡Indicates EEs at this site

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Maricopa County Air Quality Department

West Chandler (WC) (04-013-4004)
Location: Frye Rd. and Ellis St.
Spatial Scale: Neighborhood,
Middle (PM10)
Monitoring Type: Population
Exposure

Site Description: This site was established in January 1995. A wide range of land uses surround the
site including residential, agriculture, and heavy industry (semiconductor manufacturing plants and
liquid air storage). This SLAMS location monitors for CO seasonally, O3, and PM10. Meteorological
monitors operating at this site include: ambient temperature, barometric pressure, relative humidity,
and wind speed/direction.
2012

2013

2014

1.4

1.3

1.7

0

0

0

0.082*

0.081*

0.074

2

1

0

O3 3-year Avg. of 4th High (ppm)

0.074

0.072

0.071

Max. 24-hr PM10 Avg. (µg/m3)

402*

234*‡

163*‡

5

3

1

36.1

28.5

29.3

Max. 8-hr CO Avg. (ppm)
CO
Number exceedances 8-hr CO
Max. 8-hr O3 Avg. (ppm)
O3

PM10

O3 #Daily Exceedances >0.075 ppm

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

*Indicates an exceedance of the standard
‡Indicates EEs at this site

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Maricopa County Air Quality Department

West 43rd Avenue (WF) (04-013-4009)
Location: 43rd Ave. & Broadway
Rd.
Spatial Scale: Middle
Monitoring Type: Highest
Concentrations

Site Description: Monitoring began at the site in the 2nd quarter of 2002. This site is located at a
Maricopa County Department of Transportation storage lot and is surrounded by a combination of
heavy industry and residential homes. The main purpose of the site is to measure maximum PM10
concentration. The sources around the site include sand and gravel operations, auto and metal
recycling facilities, landfills, paved and unpaved haul roads, and cement casting. This SLAMS
location monitors for PM10. Meteorological monitors operating at this site include: ambient
temperature, barometric pressure, delta T (temperature inversion), and wind speed/direction.

Max. 24-hr PM10 Avg. (µg/m3)
PM10

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2012

2013

2014

254*‡

301*‡

171*‡

7

4

1

50.5

42.5

45.9

*Indicates an exceedance of the standard
‡Indicates EEs at this site

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Maricopa County Air Quality Department

West Phoenix (WP) (04-013-0019)
Location: 39th Ave. and Earll Dr.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure,
Highest Concentration (PM2.5)

Site Description: This site has been operational since 1984. The spatial scale for the West Phoenix site is
neighborhood. It is located in an area of stable, high-density residential properties. This SLAMS location
monitors for CO, NO2, O3, PM10, and PM2.5. In addition, this is a QA/QC collocation site for PM2.5 where the
MCAQD operates one filter-based PM2.5 FRM sampler along with one continuous PM2.5 FEM analyzer as per
40 CFR Part 58 Appendix A. Meteorological monitors operating at this site include: ambient temperature,
barometric pressure, delta T (temperature inversion), and wind speed/direction.

CO
NO2

Max. 8-hr CO Avg. (ppm)
Number exceedances 8-hr CO
Annual NO2 Avg. (ppb)
th

NO2 1-hr Avg. 98 Percentile (ppb)
Max. 8-hr O3 Avg. (ppm)

O3

O3 #of Daily Exceedances >0.075 ppm
th

O3 3-year Avg. of 4 High (ppm)
3

Max. 24-hr PM10 Avg. (µg/m )
PM10

Number exceedances 24-hr PM10
3

Annual PM10 Avg. (µg/m )
Max. 24-hr PM2.5 Avg. (µg/m3)
PM2.5

Annual PM2.5 Avg. (µg/m )

2013

2014

3.9

2.7

4.2

0

0

0

19.4

17.97

80.0

58.0

69.0

17.97

0.087*

0.083*

0.079*

9

4

4

0.078#

0.079#

0.078#

189*‡

255*‡

210*‡

1

2

2

46.9

35.7

38.8

112.6* (89.1*)

76.0* (53.0*)

170.7*

2 (2)

1 (3)

3

12.0 (10.4)

10.16 (10.57)

11.13

Number of Daily PM2.5 Exceedances
3

2012

th

98 Percentile PM2.5 Value
29.0 (23.6)
28.0
28.9
*Indicates an exceedance of the standard
#Indicates a violation of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.
NOTE: For 2012, and 2013, the first value is from the filter-based monitor; second value shown in parenthesis is from
continuous monitor.

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Maricopa County Air Quality Department

Zuni Hills (ZH) (04-013-4016)
Location: 109th Ave. and Deer
Valley Road.
Spatial Scale: Neighborhood
Monitoring Type: Population
Exposure

Site Description: This site opened in December 2009 and is located on the campus of the Zuni Hills
Elementary School, which is approximately 1.7 miles to the northeast from the now closed Coyote
Lakes monitor. Coyote Lakes was a source-oriented, middle-scale PM10 site that was situated in the
Agua Fria River bottom adjacent to sand and gravel mines. Zuni Hills replaced this with a populationoriented, neighborhood-scale site that is situated on the higher-elevation river bank. This site will
theoretically be able to represent the air quality for a larger area and a greater number of people. The
site was shutdown for construction in the area June 2014-August 2014. This SPM samples for PM10
only and meets the operating requirements of 40 CFR Part 58.20(c). Therefore, the data can be used
for comparison to the PM10 NAAQS. Meteorological monitors operating at this site include: ambient
temperature and wind speed/direction.

3

Max. 24-hr PM10 Avg. (µg/m )
PM10

Number exceedances 24-hr PM10
Annual PM10 Avg. (µg/m3)

2012

2013

2014

285*‡

165*‡

166*‡

1

1

1

49.1

23.5

24.0

*Indicates an exceedance of the standard
‡Indicates EEs at this site - listed value is the highest official current AQS reading.

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Maricopa County Air Quality Department

APPENDIX II - EPA-REQUIRED SITE METADATA

Detailed information includes: compliance information regarding air monitoring technical
specifications found in 40 CFR §58.10 and Appendices A, C, D, and E
(QA, monitoring methods, network design, and monitor siting)

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Maricopa County Air Quality Department

Required General Statement Regarding Changes to the PM2.5 Network
In the event the department needed to move or change a violating PM2.5 monitor, this procedure would
be followed. The department would hold a public hearing regarding the requested change. Details and
documentation of the requested change, as well as all public comments, would then be forwarded to
the EPA R9 for approval. Any action on the department’s part will be dependent on EPA R9 approval.
Please note that the previous statement is general in nature and is required to be placed in the annual
network review by 40 CFR Part 58. The department does not currently have any violating PM2.5
monitors, nor does it have any proposals to move any PM2.5 monitors.
Appendix II Site Schematic Descriptions
Analysis Method (filter samples only) refers to the method used to process and analyze PM and Pb
filter samples.
Distance from Supporting Structure refers to those sample probes that are attached to a supporting
structure, such as the side of a building. In most cases the sample probe is located above the
supporting structure, in which case the entry will show as “N/A”, aka not applicable.
Distance from Obstructions refers to those obstructions, both on the roof and off the roof, which are
located higher than the probe. In the case of a nearby obstruction being higher than the probe, details
of its location will be listed in the entry. If there are no obstructions higher than the probe, then the
entry will be N/A.
Date of Annual Performance Evaluation refers to the last 2014 QA audit on the gaseous analyzers.
These evaluations are performed by the AMD’s QA team. Twenty-five percent of the monitors
operating within each gaseous pollutant’s network are evaluated quarterly; thereby, each monitor is
evaluated at least once per year as per 40 CFR Part 58, Appendix A, §3.2.2.
Date of Semi-Annual Flow Rate Audit refers to the last 2014 QA audit on PM and Pb monitors as
per 40 CFR Part 58, Appendix A, §§ 3.2.4 and 3.3.4, respectively. These evaluations are performed by
the AMD’s QA team at least once every six months.
Probe Sample Line Material refers to the material makeup of the intake sample lines.
Pollutant Sample Residence Time refers to the amount of time that it takes a sample of air to travel
between the probe inlet and the bulkhead of the analyzer. This residence time is calculated by a
formula that is based on the sample line’s diameter and length, and the flow rate of the air intake. It is
important to keep residence time low to prevent gases in the air sample from reacting with the sample
line material or with other gases in the sample; i.e., O3 could react with nitrogen oxides in the sample if
the residence time exceeds 20 seconds. This measurement applies to CO, NO2, SO2, and O3 sample
lines.

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Maricopa County Air Quality Department

BLUE POINT

County ID: BP
AQS ID: 04-013-9702
Address: Bush Highway & Usery Pass Road, Maricopa County
Coordinates: 33.54549N, -111.60925W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule

O3
Continuous

Analysis Method (filters only)

N/A

Any Proposal to Remove or Move Monitor?

No

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Checks Performed Annually

26

# Accuracy Audits Performed Annually& Date of Last 2014 Check

5

All Precision/Accuracy Reports Submitted to AQS?

Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

Bi-Weekly

Frequency of Flow Rate Verification

N/A

-Appendix C Requirements
Sampler Make & Model

API M400 (087)

Date Established

01/01/1993

Classification

SLAMS

Method (FRM, FEM, ARM)

FEM

-Appendix D Requirements
Monitoring Type

Max Ozone Concentration

Monitoring Scale

Urban

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

Probe Inlet Height

5.3 meters

Airflow Arc

360º

Probe Sample Line Material

Teflon

Pollutant Sample Residence Time

7.6 seconds

Distance from Supporting Structure

3 meters

Distance from Obstructions

3.5 meters

Distance to Furnace Flue

None

Spacing from Trees

6 meters

Nearest Major Roadway

Bush Highway

12/18/14

Distance and Direction to Road

160 meters, S

Traffic Count (ADT)

1,000

Groundcover

Paved

BUCKEYE
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Maricopa County Air Quality Department

County ID: BE
AQS ID: 04-013-4011
Address 26453 W MC85
Coordinates: 33.37005N, -111.62070W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

O3

CO

NO2

PM10

Sampling Schedule

Continuous

Continuous

Continuous

Continuous

Analysis Method (filters only)

N/A

N/A

N/A

N/A

Any Proposal to Remove or Move Monitor?

No

No

No

No

Is site suitable for comparison to PM2.5 NAAQS
per Part 58.30?

N/A

N/A

N/A

N/A

25

15

25

23

4 10/28/14

2 09/03/14

2 11/13/14

2 02/05/14
09/03/14

Yes

Yes

Yes

Yes

Annual Data Certification Submitted?

Submitted May
2015

Submitted May
2015

Submitted May
2015

Submitted May
2015

Frequency of One-Point QC Check

Bi-Weekly

Bi-Weekly

Bi-Weekly

N/A

Frequency of Flow Rate Verification

N/A

N/A

N/A

Semi-monthly

Sampler Make & Model

API M400 (087)

API M300 (093)

API M200 (099)

Thermo TEOM
1400AB (079)

Date Established

08/01/2004

08/01/2004

08/01/2004

08/01/2004

Classification

SLAMS

SLAMS

SLAMS

SLAMS

Method (FRM, FEM, ARM)

FEM

FRM

FRM

FEM

Monitoring Type

Population
Exposure

Population
Exposure

Population
Exposure

Population
Exposure

Monitoring Scale

Neighborhood

Neighborhood

Neighborhood

Neighborhood

Sampling Season

Jan-Dec

Sep-Mar

Jan-Dec

Jan-Dec

Network Meets Minimum Number of Monitors
Required?

Yes

Yes

Yes

Yes

Distance between collocated samplers

N/A

N/A

N/A

N/A

Probe Inlet Height

4 meters

4 meters

4 meters

4.5 meters

Airflow Arc

360º

360º

360º

360º

Distance from Supporting Structure

2 meters

2 meters

2 meters

2.1 meters

Probe Sample Line Material

Teflon

Teflon

Teflon

N/A

Pollutant Sample Residence Time

4.0 seconds

4.0 seconds

4.0 seconds

N/A

Distance from Obstructions

None

None

None

None

Distance to Furnace Flue

None

None

None

None

Spacing from Trees

14 meters, N

14 meters, N

14 meters, N

14 meters, N

Nearest Major Roadway

US Hwy 85

US Hwy 85

US Hwy 85

US Hwy 85

Distance and Direction to Road

31 meters, N

31 meters, N

31 meters, N

31 meters, N

Traffic Count (ADT)

3,000

3,000

3,000

3,000

Paved

Paved

Paved

Paved

-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to
AQS?

-Appendix C Requirements

-Appendix D Requirements

-Appendix E Requirements

Groundcover

CAVE CREEK

County ID: CC
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Maricopa County Air Quality Department

AQS ID: 04-013-4008
Address: 37019 N Lava Lane, Phoenix
Coordinates: 33.82169N, -112.01739W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

O3

Sampling Schedule

Continuous

Analysis Method (filters only)

N/A

Any Proposal to Remove or Move Monitor?

No

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Checks Performed Annually

26

# Accuracy Audits Performed Annually & Date of Last 2014 Check

5

All Precision/Accuracy Reports Submitted to AQS?

Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

Bi-weekly

Frequency of Flow Rate Verification

N/A

10/07/14

-Appendix C Requirements
Sampler Make & Model

API M400 (087)

Date Established

07/20/2001

Classification

SLAMS

Method (FRM, FEM, ARM)

FEM

-Appendix D Requirements
Monitoring Type

Max Ozone Concentration

Monitoring Scale

Urban

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

Probe Inlet Height

4.8 meters

Airflow Arc

360º

Probe Sample Line Material

Teflon

Pollutant Sample Residence Time

10.2 seconds

Distance from Supporting Structure

2.5 meters

Distance from Obstructions

None

Distance to Furnace Flue

None

Spacing from Trees

14.9 meters

Nearest Major Roadway

32nd Street

Distance and Direction to Road

240 meters, NE

Traffic Count (ADT)

1,000

Groundcover

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Maricopa County Air Quality Department

CENTRAL PHOENIX

County ID: CP
AQS ID: 04-013-3002
Address: 1645 E Roosevelt, Phoenix
Coordinates: 33.45793N, -112.04601W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

O3

Sampling Schedule

Continuous

Analysis Method (filters only)
Any Proposal to Remove or
Move Monitor?
Is site suitable for comparison
to PM2.5 NAAQS per Part
58.30?
-Appendix A Requirements
# Precision Checks Performed
Annually
# Accuracy Audits Performed
Annually &
Date of Last 2014 Check on
Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy
Reports Submitted to AQS?
Annual Data Certification
Submitted?
Frequency of One-Point QC
Check
Frequency of Flow Rate
Verification
-Appendix C Requirements

N/A

CO
Continuou
s
N/A

No

No

No

No

No

N/A

N/A

N/A

N/A

N/A

25

25

26

25

21

4
11/04/14

4
11/05/14

4
08/12/14

Yes

Yes

Yes

Yes

Yes

Submitted
May 2015

Submitted
May 2015
BiWeekly

Submitted
May 2015

Submitted
May 2015

Submitted
May 2015

Bi-Weekly

Bi-Weekly

N/A

Bi-Weekly

NO2

SO2

PM10

Continuous

Continuous

Continuous

N/A

N/A

N/A

4

10/22/14

2
06/107/14
11/05/14

N/A

N/A

N/A

N/A

Semimonthly

Sampler Make & Model

API M400
(087)

API M300
(093)

API M200
(099)

API M100
(100)

Thermo
TEOM
1400AB
(079)

Date Established

06/01/1967

01/01/1967

01/01/1965

04/01/1985

SLAMS
FRM

SLAMS
FEM

SLAMS
FEM

Highest
Concentrati
on
Neighborho
od
Jan-Dec

Highest
Concentratio
n
Neighborhoo
d
Jan-Dec

Classification
Method (FRM, FEM, ARM)

SLAMS
FEM

10/01/196
6
SLAMS
FRM

-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season

Population
Exposure
Neighborh
ood
Jan-Dec

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Populatio
n
Exposure
Neighborh
ood
Jan-Dec

Page 106 of 139

Population
Exposure
Neighborho
od
Jan-Dec

Maricopa County Air Quality Department

Network Meets Minimum
Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated
samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence
Time
Distance from Supporting
Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to
Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to
Road
Traffic Count (ADT)
Groundcover

Yes

Yes

Yes

Yes

Yes

N/A

N/A

N/A

N/A

N/A

10.3 meters

10.3 meters

10.3 meters

360º
Teflon

360º
Teflon

360º
N/A

360º
Teflon

10.3
meters
360º
Teflon

9.0 seconds

N/A

9.0 seconds

10.0 seconds

N/A

2.5 meters

2.5 meters

2.5 meters

2.5 meters

2.1 meters

None
None
None

None
None
None

None
None
None

None
None
None

None
None
None

16th Street
88 meters,
W
24,000
Roosevelt
St.
75 meters,
N
Unknown
Paved

16th Street
88 meters,
W
24,000
Roosevelt
St.
75 meters,
N
Unknown
Paved

16th Street
88 meters,
W
24,000
Roosevelt
St.
75 meters,
N
Unknown
Paved

16th Street

16th Street
91 meters,
W
24,000
Roosevelt
St.

10.3 meters

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88 meters, W
24,000
Roosevelt St.
75 meters, N

75 meters, N

Unknown
Paved

Unknown
Paved

Maricopa County Air Quality Department

DEER VALLEY

County ID: DV
AQS ID: 04-013-4018
Address: 1030 West Deer Valley Road, Phoenix
Coordinates: 33.684627N, -112.08635W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

Pb

Sampling Schedule

1 in 6 day

Analysis Method (filters only)

EQL-0995-110

Any Proposal to Remove or Move Monitor?

No

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Flow Rate Checks Performed Annually

28 (collocated)

# Accuracy Audit Performed Annually & Date of Last Two 2014 Checks

2

All Precision/Accuracy Reports Submitted to AQS?

03/04/14
08/09/14
Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

Weekly

Frequency of Flow Rate Audits

Semi-Annual

-Appendix C Requirements
Sampler Make & Model

Hi-Q TSP Sampler (109)

Date Established

07/01/2010

Classification

SLAMS

Method (FRM, FEM, ARM)

FRM

-Appendix D Requirements
Monitoring Type

Source-oriented

Monitoring Scale

Middle Scale

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

2.7 meters

Probe Inlet Height

4.1 meters

Airflow Arc

360º

Probe Sample Line Material

N/A

Pollutant Sample Residence Time

N/A

Distance from Supporting Structure

1.1 meters

Distance from Obstructions

None

Distance to Furnace Flue

None

Spacing from Trees

None

Nearest Major Roadway

Deer Valley

Distance and Direction to Road

300 meters, S

Traffic Count (ADT)

6,452

Groundcover

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Maricopa County Air Quality Department

DIABLO

County ID: DI
AQS ID: 04-013-4019
Address: 1919 W. Fairmount Dr., Tempe
Coordinates: 33.3961N, -111.9680
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous
Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to
AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of
Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees

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CO
Continuous
N/A
No

NO2
Continuous
N/A
No

PM2.5
Continuous
N/A
No

N/A

N/A

N/A

23

23

16

5

11/19/14

3

08/27/14

3

08/27/14
10/29/14

Yes

Yes

Yes

Submitted May
2015
Bi-Weekly
N/A

Submitted
May 2015
Bi-Weekly
N/A

Submitted May
2015
N/A
Semi-monthly

API M300
(093)
2/13/2014
SLAMS
FRM

API M200
(099)
02/13/2014
SLAMS
FRM

TEOM 1405
DF (182)
05/01/2014
SLAMS
FEM

Max. Conc.
Source
Micro
Jan-Dec

Max. Conc.
Source
Micro
Jan-Dec

Max Conc.
Source
Micro
Jan-Dec

Yes

Yes

Yes

N/A
5 meters
360º
Teflon
4.5 seconds
2.6 meters
None
None
None

N/A
5 meters
360º
Teflon
4.5 seconds
2.6 meters
None
None
None

N/A
5 meters
360º
N/A
N/A
2.4 meters
None
None
None

Page 109 of 139

Maricopa County Air Quality Department

Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

Interstate-10
30 meters, E
275,000
Fairmount Dr.
18 meters, N
3,000
Paved/Gravel

Page 110 of 139

Interstate-10
30 meters, E
275,000
Fairmount Dr.
18 meters, N
3,000
Paved/Gravel

Interstate-10
30 meters, E
275,000
Fairmount Dr.
18 meters, N
3,000
Paved/Gravel

Maricopa County Air Quality Department

DURANGO COMPLEX

County ID: DC
AQS ID: 04-013-9812
Address: 2702 RC Esterbrooks Blvd, Phoenix
Coordinates: 33.42650N, -112.11814W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS
per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to
AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification

PM10
Continuous
N/A
No

PM2.5
Continuous
N/A
No

SO2
Continuous
N/A
No

N/A

Yes

N/A

25

24

27

2

01/03/14
07/03/14

2

01/03/14
07/03/14

3

10/09/14

Yes

Yes

Yes

Submitted May
2015
N/A
Semi-monthly

Submitted
May 2015
N/A
Semi-monthly

Submitted
May 2015
Bi-Weekly
N/A

TEOM 1400AB
(079)
07/01/1999
SLAMS
FEM

FDMS-TEOM
1400AB (181)
07/01/2005
SLAMS
FEM

API M100
(100)
01/01/2011
SLAMS
FRM

Highest
Concentration
Middle
Jan-Dec

Highest
Concentration
Middle
Jan-Dec

Highest
Concentration
Middle
Jan-Dec

Yes

Yes

Yes

-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers

N/A

N/A

N/A

Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions

3.9 meters
360º
N/A
N/A
3.7 meters
8 meters

4.8 meters
360º
N/A
N/A
2 meters
2 meters

3.9 meters
360º
Teflon
10.0 sec
2 meters
2 meters

Distance to Furnace Flue

None

None

None

FINAL - 2014 Air Monitoring Network Plan

Page 111 of 139

Maricopa County Air Quality Department

Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road

8 meters, S
27th Ave
78 meters, E

8 meters, S
27th Ave
76 meters, E

8 meters, S
27th Ave
76 meters, E

Traffic Count (ADT)
Groundcover

16,000
Paved

16,000
Paved

16,000
Paved

FINAL - 2014 Air Monitoring Network Plan

Page 112 of 139

Maricopa County Air Quality Department

DYSART

County ID: DY
AQS ID: 04-013-4010
Address: 16825 N Dysart Rd, Surprise
Coordinates: 33.63713N, -112.34184W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to AQS?

O3
Continuous
N/A
No

CO
Continuous
N/A
No

PM10
Continuous
N/A
No

N/A

N/A

N/A

26

15

25

4 10/29/14

2

Yes
Submitted May
2015
Bi-Weekly
N/A

Yes
Submitted May
2015
Bi-Weekly
N/A

Sampler Make & Model

API M400 (087)

API M300 (093)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements

7/21/2003
SLAMS
FEM

09/01/2003
SLAMS
FRM

TEOM 1400AB
(079)
07/14/2003
SLAMS
FRM

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Sep-Mar

Population
Exposure
Neighborhood
Jan-Dec

Yes

Yes

Yes

N/A
3.3 meters
360º
Teflon
4.8 seconds
1.6 meters
None
None
None
Dysart
17 meters, W
12,000
Bell Rd
495 meters, N
43,000
Paved/Gravel

N/A
3.3 meters
360º
Teflon
4.8 seconds
1.6 meters
None
None
None
Dysart
17 meters, W
12,000
Bell Rd
495 meters, N
43,000
Paved/Gravel

N/A
2.6 meters
360º
N/A
N/A
2 meters
None
None
None
Dysart
12 meters, W
12,000
Bell Rd
460 meters, N
43,000
Paved/Gravel

Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements

Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

Page 113 of 139

09/03/14

2

01/09/14
07/09/14

Yes
Submitted May
2015
N/A
Semi-monthly

Maricopa County Air Quality Department

FALCON FIELD

County ID: FF
AQS ID: 04-013-1010
Address: 4530 E McKellips Rd, Mesa
Coordinates: 33.45223N, -111.73331W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzer
All Precision/Accuracy Reports Submitted to AQS?

O3
Continuous
N/A
No
N/A
27
4

10/08/14

Yes

Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification

Submitted May 2015
Bi-Weekly
N/A

-Appendix C Requirements
Sampler Make & Model
Date Established

API M400 (087)
06/01/1989

Classification
Method (FRM, FEM, ARM)

SLAMS
FEM

-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season

Population Exposure
Neighborhood
Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material

N/A
9.3 meters
360º
Teflon

Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway

16.4 seconds
2.5 meters
None
None
25+ meters
McKellips

Distance and Direction to Road
Traffic Count (ADT)
Groundcover

58 meters, S
29,000
Paved

FINAL - 2014 Air Monitoring Network Plan

Page 114 of 139

Maricopa County Air Quality Department

FOUNTAIN HILLS

County ID: FH
AQS ID: 04-013-9704
Address: 16426 E. Palisades Blvd., Fountain Hills
Coordinates: 33.61103N, -111.72529W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzer
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

Page 115 of 139

O3
Continuous
N/A
Shutdown 8/27/13 for construction.
Reopened 5/14/14
N/A
16
3

11/17/14

Yes
Submitted May 2015
Bi-Weekly
N/A
API M400 (087)
04/01/1996
SLAMS
FEM
Max Ozone Concentration
Neighborhood
Jan-Dec
Yes
N/A
4.3 meters
360º
Teflon
4.8 seconds
2 meters
Canopy 1 meter higher than probe,
located 9 meters to the south
None
15 meters, W
Palisades Blvd
70 meters, SW
8,000
Paved

Maricopa County Air Quality Department

GLENDALE

County ID: GL
AQS ID: 04-013-2001
Address: 6001 W Olive, Glendale
Coordinates: 33.56936N, -112.19153W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous
Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to
AQS?

O3
Continuous
N/A
No

CO
Continuous
N/A
No

PM10
Continuous
N/A
No

PM2.5
Continuous
N/A
No

N/A

N/A

N/A

Yes

24

13

23

22

4

10/29/14

2

09/04/14

2

05/14/14
10/29/14

2

05/14/14
10/29/14

Yes

Yes

Yes

Yes

Frequency of One-Point QC Check

Submitted May
2015
Bi-Weekly

Submitted
May 2015
Bi-Weekly

Submitted May
2015
N/A

Submitted May
2015
N/A

Frequency of Flow Rate Verification

N/A

N/A

Semi-monthly

Semi-monthly

API M400
(087)
01/01/1974
SLAMS
FEM

API M300
(093)
01/01/1974
SLAMS
FRM

TEOM 1400AB
(079)
07/01/1987
SLAMS
FEM

FDMS-TEOM
1400AB (181)
6/1/2011
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Sep-Mar

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Jan-Dec

Yes

Yes

Yes

Yes

N/A
3.7 meters
360º
Teflon

N/A
3.7 meters
360º
Teflon

N/A
3.4 meters
360º
N/A

N/A
4.0 meters
360º
N/A

4.5 seconds
2 meters
2.5m

4.5 seconds
2 meters
2.5m

N/A
2.1 meters
None

N/A
3.1 meters
None

Annual Data Certification Submitted?

-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions

FINAL - 2014 Air Monitoring Network Plan

Page 116 of 139

Maricopa County Air Quality Department

Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A

None
None
Olive Ave

None
None
Olive Ave

None
None
Olive Ave

None
None
Olive Ave

Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

225 meters, S
25,000
59th Ave
475 meters, E
30,500
Paved

225 meters, S
25,000
59th Ave
475 meters, E
30,500
Paved

227 meters, S
25,000
59th Ave
430 meters, E
30,500
Paved

227 meters, S
25,000
59th Ave
430 meters, E
30,500
Paved

FINAL - 2014 Air Monitoring Network Plan

Page 117 of 139

Maricopa County Air Quality Department

GREENWOOD

County ID: GR
AQS ID: 04-013-3010
Address: 1128 N 27th Ave., Phoenix
Coordinates: 33.46093N, -112.11748W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements

CO
Continuous
N/A
No

NO2
Continuous
N/A
No

PM10
Continuous
N/A
No

N/A

N/A

N/A

26

26

24

2

11/10/14

4

12/23/14

2

02/05/14
09/16/14

Yes
Submitted May 2015
Bi-Weekly
N/A

Yes
Submitted May 2015
Bi-Weekly
N/A

Sampler Make & Model

API M300 (093)

API M200 (099)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

11/01/1993
SLAMS
FRM

11/01/1993
SLAMS
FRM

TEOM 1400AB
(079)
11/01/1993
SLAMS
FEM

Population Exposure
Middle
Jan-Dec

Population Exposure
Middle
Jan-Dec

Population Exposure
Middle
Jan-Dec

Yes

Yes

Yes

N/A
4.2 meters
360º
Teflon
4.3 seconds
2 meters
25+ meters
None
20 meters, NW
27th Ave
10 meters, E
18,500
I-10
85 meters, N
229,000
Paved

N/A
4.2 meters
360º
Teflon
4.3 seconds
2 meters
25+ meters
None
20 meters, NW
27th Ave
10 meters, E
18,500
I-10
85 meters, N
229,000
Paved

N/A
4.4 meters
360º
N/A
N/A
2 meters
25+ meters
None
20 meters, NW
27th Ave
10 meters, E
18,500
I-10
85 meters, N
229,000
Paved

Page 118 of 139

Maricopa County Air Quality Department

FINAL - 2014 Air Monitoring Network Plan

Yes
Submitted May 2015
N/A
Semi-monthly

HIGLEY

County ID: HI
AQS ID: 04-013-4006
Address: 15400 South Higley Road, Gilbert
Coordinates: 33.31074N, -111.72255W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

Page 119 of 139

PM10
Continuous
N/A
Yes in 2014
N/A
18
2

07/14/14

Yes
Submitted May 2015
N/A
Bi-Weekly
TEOM 1400AB (079)
07/01/2000
SLAMS
FEM
Population Exposure
Neighborhood
Jan-Dec
Yes
N/A
2.9 meters
360º
N/A
N/A
2.2 meters
10 meters
None
10 meters
Higley Rd
117 meters, E
11,500
Williams Field Rd
410 meters, S
11,500
Paved

Maricopa County Air Quality Department

HUMBOLDT MOUNTAIN

County ID: HM
AQS ID: 04-013-9508
Address: Seven Springs Rd-FAA Radar Station, Tonto National Forest
Coordinates: 33.98280N, -111.79870W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per Part
58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzer
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

Page 120 of 139

O3
Continuous
N/A
No
N/A

24
4

11/13/14

Yes
Submitted May 2015
Bi-Weekly
N/A
API M400 (087)
01/01/1993
SLAMS
FEM
Max Ozone Concentration
Regional
Jan-Dec
Yes

N/A
4.5 meters
360º
Teflon
6.2 seconds
2.8 meters
9 meters
None
None
N/A (Remote mountaintop site, only
reachable by small access road)
N/A
N/A
Dirt/Vegetated

Maricopa County Air Quality Department

MESA

County ID: ME
AQS ID: 04-013-1003
Address: 310 S Brooks, Mesa
Coordinates: 33.41045N, -111.86507W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS
per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers
& Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to
AQS?

O3
Continuous
N/A
No

CO
Continuous
N/A
No

PM10
Continuous
N/A
No

PM2.5
Continuous
N/A
No

N/A

N/A

N/A

Yes

27

16

26

26

4

11/20/14

3

10/23/14

2

02/26/14
10/07/14

2

02/26/14
08/28/14

Yes

Yes

Yes

Yes

Submitted May
2015
Bi-Weekly
N/A

Submitted May
2015
Bi-Weekly
N/A

Submitted May
2015
N/A
Bi-Weekly

Submitted May
2015
N/A
Bi-Weekly

Sampler Make & Model

API M400 (087)

API M300 (093)

TEOM 1400AB
(079)

TEOM 1405-DF
(182)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements

11/1/2012
SLAMS
FEM

01/01/1978
SLAMS
FEM

11/1/2012
SLAMS
FEM

11/1/2012
SLAMS
FEM

Monitoring Type

Population
Exposure

Population
Exposure

Population
Exposure

Population
Exposure

Monitoring Scale

Neighborhood

Neighborhood

Neighborhood

Neighborhood

Sampling Season

Jan-Dec

Sep-Mar

Jan-Dec

Jan-Dec

Yes

Yes

Yes

Yes

N/A
7 meters
360º
Teflon
4.6 seconds
2 meters
25+ meters
None
25+ meters
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

N/A
7 meters
360º
Teflon
4.6 seconds
2 meters
25+ meters
None
25+ meters
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

N/A
6.2 meters
360º
N/A
N/A
2.5 meters
25+ meters
None
25+ meters
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

N/A
6.9 meters
360º
N/A
N/A
3 meters
25+ meters
None
25+ meters
Broadway Rd.
305 meters, S
33,000
Paved/Gravel

Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements

Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

NORTH PHOENIX
FINAL - 2014 Air Monitoring Network Plan

Page 121 of 139

Maricopa County Air Quality Department

County ID: NP
AQS ID: 04-013-1004
Address: 601 E Butler Dr., Phoenix
Coordinates: 33.56033N, -112.06626W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

O3
Continuous
N/A
No

CO
Continuous
N/A
No

PM10
Continuous
N/A
No

PM2.5
Continuous
N/A
No

N/A

N/A

N/A

Yes

27

15

25

23

3

11/03/14

3

11/03/14

2

03/10/14
09/10/14

3

08/26/14
09/10/14

Yes
Submitted May
2015
Bi-Weekly
N/A

Yes
Submitted
May 2015
Bi-Weekly
N/A

Yes
Submitted
May 2015
N/A
Bi-Weekly

API M400
(087)

API M300
(093)

BAM 1020
(122)

01/01/1975
SLAMS
FEM

01/01/1974
SLAMS
FRM

9/1/2011
SLAMS
FEM

BAM 1020
(122) / TEOM
1400AB (079)
9/1/2011
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Sep-Mar

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Jan-Dec

Yes

Yes

Yes

Yes

N/A
4.6 meters
360º
Teflon
5.0 seconds
2.1 meters
4 meters
None
None
7th Street
75 meters, E
32,000
Gravel

N/A
4.6 meters
360º
Teflon
5.0 seconds
2.1 meters
4 meters
None
None
7th Street
75 meters, E
32,000
Gravel

N/A
4.5 meters
360º
N/A
N/A
2.1 meters
4 meters
None
None
7th Street
75 meters, E
32,000
Gravel

N/A
4.5 meters
360º
N/A
N/A
3.3 meters
5 meters
None
None
7th Street
75 meters, E
32,000
Gravel

Page 122 of 139

Yes
Submitted May
2015
N/A
Bi-Weekly

Maricopa County Air Quality Department

PINNACLE PEAK

County ID: PP
AQS ID: 04-013-2005
Address: 24295 N Alma School Rd, Scottsdale
Coordinates: 33.70655N, -111.85557W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

O3

Sampling Schedule

Continuous

Analysis Method (filters only)

N/A

Any Proposal to Remove or Move Monitor?

No

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Checks Performed Annually

27

# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzer

3

All Precision/Accuracy Reports Submitted to AQS?

Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

Bi-Weekly

Frequency of Flow Rate Verification

N/A

07/17/14

-Appendix C Requirements
Sampler Make & Model

API M400 (087)

Date Established

02/01/1988

Classification

SLAMS

Method (FRM, FEM, ARM)

FEM

-Appendix D Requirements
Monitoring Type

Max Ozone Concentration

Monitoring Scale

Urban

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

Probe Inlet Height

5.9 meters

Airflow Arc

360º

Probe Sample Line Material

Teflon

Pollutant Sample Residence Time

6.2 seconds

Distance from Supporting Structure

3 meters

Distance from Obstructions

4.2 meters

Distance to Furnace Flue

None

Spacing from Trees

None

Nearest Major Roadway

Happy Valley Rd.

Distance and Direction to Road

61 meters, S

Traffic Count (ADT)

16,000

Groundcover

FINAL - 2014 Air Monitoring Network Plan

Paved/Grass

Page 123 of 139

Maricopa County Air Quality Department

RIO VERDE

County ID: RV
AQS ID: 04-013-9706
Address: 25608 N Forest Rd., Rio Verde
Coordinates: 33.71881N, -111.67183W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

O3

Sampling Schedule

Continuous

Analysis Method (filters only)

N/A

Any Proposal to Remove or Move Monitor?

No

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Checks Performed Annually

27

# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzer

3

All Precision/Accuracy Reports Submitted to AQS?

Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

Bi-Weekly

Frequency of Flow Rate Verification

N/A

11/03/14

-Appendix C Requirements
Sampler Make & Model

API M400 (087)

Date Established

01/01/1997

Classification

SLAMS

Method (FRM, FEM, ARM)

FEM

-Appendix D Requirements
Monitoring Type

Max Ozone Concentration

Monitoring Scale

Urban

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

Probe Inlet Height

6.2 meters

Airflow Arc

360º

Probe Sample Line Material

Teflon

Pollutant Sample Residence Time

9.7 seconds

Distance from Supporting Structure

3 meters

Distance from Obstructions

3 meters

Distance to Furnace Flue

None

Spacing from Trees

None

Nearest Major Roadway

Forest Rd

Distance and Direction to Road

43 meters, E

Traffic Count (ADT)

Unknown

Groundcover

FINAL - 2014 Air Monitoring Network Plan

Paved

Page 124 of 139

Maricopa County Air Quality Department

SOUTH PHOENIX

County ID: SP
AQS ID: 04-013-4003
Address: 33 W Tamarisks, Phoenix
Coordinates: 33.40316N, -112.07533W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5
NAAQS per Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous
Analyzers & Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to
AQS?

O3
Continuous
N/A
No

CO
Continuous
N/A
No

PM10
Continuous
N/A
No

PM2.5
Continuous
N/A
No

N/A

N/A

N/A

Yes

24

14

22

22

4 12/26/14

4

Yes

Yes

Yes

Yes

Submitted May
2015
Bi-Weekly
N/A

Submitted May
2015
Bi-Weekly
N/A

Submitted May 2015

Submitted May 2015

N/A
Semi-Monthly

N/A
Semi-Monthly

Sampler Make & Model

API M400 (087)

API M300 (093)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements

10/01/1999
SLAMS
FEM

10/01/1999
SLAMS
FRM

TEOM 1400AB
(079)
7/1/2007
SLAMS
FEM

TEOM 1405-DF
(182)
05/01/2010
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Sep-Mar

Population Exposure

Population Exposure

Neighborhood
Jan-Dec

Neighborhood
Jan-Dec

Yes

Yes

Yes

Yes

N/A
4.9 meters
360º
Teflon
6.9 seconds
5 meters
25+m
None
9 meters
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
4.9 meters
360º
Teflon
6.9 seconds
5 meters
25+m
None
9 meters
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
5.4 meters
360º
N/A
N/A
2 meters
25+m
None
2 meters
Central Ave
165 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

N/A
5.5 meters
360º
N/A
N/A
5 meters
25+m
None
4 meters
Central Ave
168 meters, E
24,000
Broadway Rd
385 meters, N
18,000
Paved

Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements

Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of
Monitors Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

10/02/14

Page 125 of 139

2

04/16/14
10/30/14

2

05/01/14
10/30/14

Maricopa County Air Quality Department

SOUTH SCOTTSDALE

County ID: SS
AQS ID: 04-013-3003
Address: 2857 N Miller Rd., Scottsdale
Coordinates: 33.47968N, -111.91721W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

O3

CO

PM10

Sampling Schedule

Continuous

Continuous

Continuous

Analysis Method (filters only)

N/A

N/A

N/A

Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements

No

No

No

N/A

N/A

N/A

# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to AQS?

27

16

26

5

11/05/14

2

09/04/14

2

04/10/14
10/23/14

Annual Data Certification Submitted?

Yes
Submitted May 2015

Yes
Submitted May 2015

Yes
Submitted May 2015

Frequency of One-Point QC Check

Bi-Weekly

Bi-Weekly

N/A

Frequency of Flow Rate Verification

N/A

N/A

Bi-Weekly

Sampler Make & Model

API M400 (087)

API M300 (093)

TEOM 1405 (079)

Date Established

01/01/1974

01/01/1974

09/01/2012

Classification

SLAMS

SLAMS

SLAMS

Method (FRM, FEM, ARM)

FEM

FRM

FEM

Monitoring Type

Population Exposure

Population Exposure

Population Exposure

Monitoring Scale

Neighborhood

Neighborhood

Neighborhood

Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements

Jan-Dec

Sep-Mar

Jan-Dec

Yes

Yes

Yes

Distance between collocated samplers

N/A

N/A

N/A

Probe Inlet Height

5.8 meters

5.8 meters

6.1 meters

Airflow Arc

360º

360º

360º

Probe Sample Line Material

Teflon

Teflon

N/A

Pollutant Sample Residence Time

7.3 seconds

7.3 seconds

N/A

Distance from Supporting Structure

2.5 meters

2.5 meters

2.5 meters

Distance from Obstructions

2.5 meters

2.5 meters

3 meters

Distance to Furnace Flue

None

None

None

Spacing from Trees

10 meters

10 meters

10 meters

Nearest Major Roadway A

Thomas

Thomas

Thomas

Distance and Direction to Road

66 meters, N

66 meters, N

62 meters, N

Traffic Count (ADT)

33,000

33,000

33,000

-Appendix C Requirements

-Appendix D Requirements

Nearest Major Roadway B

Miller

Miller

Miller

Distance and Direction to Road

32 meters, W

32 meters, W

35 meters, W

Traffic Count (ADT)

13,000

13,000

13,000

Paved

Paved

Paved

Groundcover

FINAL - 2014 Air Monitoring Network Plan

Page 126 of 139

Maricopa County Air Quality Department

TEMPE

County ID: TE
AQS ID: 04-013-4005
Address: 1525 S College, Tempe
Coordinates: 33.4124N, -111.93473W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule

O3
Continuous

CO
Continuous

PM10
Continuous

PM2.5
Continuous

Analysis Method (filters only)

N/A

N/A

N/A

N/A

Any Proposal to Remove or Move Monitor?

No

No

No

No

N/A

N/A

N/A

Yes

26

15

25

25

2 11/10/14

3 09/04/14

2 04/14/14
11/10/14

3 11/04/14
11/10/14

All Precision/Accuracy Reports Submitted to AQS?

Yes

Yes

Yes

Yes

Annual Data Certification Submitted?

Submitted May
2015
Bi-Weekly

Submitted May 2015

Submitted May 2015

Frequency of One-Point QC Check

Submitted May
2015
Bi-Weekly

N/A

N/A

Frequency of Flow Rate Verification

N/A

N/A

Bi-Weekly

Bi-Weekly

Sampler Make & Model

API M400 (087)

API M300 (093)

Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements

07/01/2000
SLAMS
FEM

07/01/2000
SLAMS
FRM

TEOM
1400 AB (079)
3/1/2012
SLAMS
FEM

TEOM1405 DF
(182)
3/1/2012
SLAMS
FEM

Population
Exposure
Neighborhood
Jan-Dec

Population
Exposure
Neighborhood
Sep-Mar

Population Exposure

Population Exposure

Neighborhood
Jan-Dec

Neighborhood
Jan-Dec

Yes

Yes

Yes

Yes

N/A
4.4 meters
360º
Teflon
4.5 seconds
2.5 meters

N/A
4.4 meters
360º
Teflon
4.5 seconds
2.5 meters

N/A
2.7 meters
360º
N/A
N/A
2 meters

N/A
3.7 meters
360º
N/A
N/A
3 meters

Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM

-Appendix C Requirements

Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions

2.5 meters

2.5 meters

8 meters

7 meters

Distance to Furnace Flue

None

None

None

None

Spacing from Trees

None

None

None

None

Nearest Major Roadway A

College Ave

College Ave

College Ave

College Ave

Distance and Direction to Road

11 meters, W

11 meters, W

11 meters, W

11 meters, W

Traffic Count (ADT)

Unknown

Unknown

Unknown

Unknown

Apache

Apache

Apache

Apache

Distance and Direction to Road

370 meters, N

370 meters, N

370 meters, N

370 meters, N

Traffic Count (ADT)

25,000

25,000

25,000

25,000

Gravel

Gravel

Gravel

Gravel

Nearest Major Roadway B

Groundcover

WEST CHANDLER
FINAL - 2014 Air Monitoring Network Plan

Page 127 of 139

Maricopa County Air Quality Department

County ID: WC
AQS ID: 04-013-4004
Address: 275 S Ellis, Chandler
Coordinates: 33.29898N, -111.88431W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule
Analysis Method (filters only)
Any Proposal to Remove or Move Monitor?
Is site suitable for comparison to PM2.5 NAAQS per
Part 58.30?
-Appendix A Requirements
# Precision Checks Performed Annually
# Accuracy Audits Performed Annually &
Date of Last 2014 Check on Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports Submitted to AQS?
Annual Data Certification Submitted?
Frequency of One-Point QC Check
Frequency of Flow Rate Verification
-Appendix C Requirements
Sampler Make & Model
Date Established
Classification
Method (FRM, FEM, ARM)
-Appendix D Requirements
Monitoring Type
Monitoring Scale
Sampling Season
Network Meets Minimum Number of Monitors
Required?
-Appendix E Requirements
Distance between collocated samplers
Probe Inlet Height
Airflow Arc
Probe Sample Line Material
Pollutant Sample Residence Time
Distance from Supporting Structure
Distance from Obstructions
Distance to Furnace Flue
Spacing from Trees
Nearest Major Roadway A
Distance and Direction to Road
Traffic Count (ADT)
Nearest Major Roadway B
Distance and Direction to Road
Traffic Count (ADT)
Groundcover

FINAL - 2014 Air Monitoring Network Plan

O3
Continuous
N/A
Yes in 2014

CO
Continuous
N/A
Yes in 2014

PM10
Continuous
N/A
Yes in 2014

N/A

N/A

N/A

27

16

23

4

10/09/14

2

09/12/14

2

01/03/14
07/03/14

Yes
Submitted May 2015
Bi-Weekly
N/A

Yes
Submitted May 2015
Bi-Weekly
N/A

Yes
Submitted May 2015
N/A
Bi-Weekly

API M400 (087)
07/01/2000
SLAMS
FEM

API M300 (093)
07/01/2000
SLAMS
FRM

TEOM 1400 AB (079)
07/01/2000
SLAMS
FRM

Population Exposure
Neighborhood
Jan-Dec

Population Exposure
Neighborhood
Sep-Mar

Population Exposure
Middle
Jan-Dec

Yes

Yes

Yes

N/A
4.4 meters
360º
Teflon
4.6 seconds
1.5 meters
3.5 meters
None
14 meters, E
Frye Rd
3.5 meters, S
Unknown (secondary
street)
Ellis St
73 meters, W
Unknown (secondary
street)
Paved/Gravel

N/A
4.4 meters
360º
Teflon
4.6 seconds
1.5 meters
3.5 meters
None
14 meters, E
Frye Rd
3.5 meters, S
Unknown (secondary
street)
Ellis St
73 meters, W
Unknown (secondary
street)
Paved/Gravel

N/A
4.4 meters
360º
N/A
N/A
2.5 meters
3.5 meters
None
14 meters, E
Frye Rd
3.5 meters, S
Unknown (secondary
street)
Ellis St
71 meters, W
Unknown (secondary
street)
Paved/Gravel

Page 128 of 139

Maricopa County Air Quality Department

WEST 43RD AVENUE

County ID: WF
AQS ID: 04-013-4009
Address: 3940 W Broadway, Phoenix
Coordinates: 33.40642N, -112.14434W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

PM10

Sampling Schedule

Continuous

Analysis Method (filters only)

N/A

Any Proposal to Remove or Move Monitor?

No

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Checks Performed Annually

26

# Accuracy Audits Performed Annually &
Date of Last Two 2014 Checks for PM

2

All Precision/Accuracy Reports Submitted to AQS?

Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

N/A

Frequency of Flow Rate Verification

Bi-Weekly

05/12/14
11/12/14

-Appendix C Requirements
Sampler Make & Model

TEOM 1400AB (079)

Date Established

04/01/2002

Classification

SLAMS

Method (FRM, FEM, ARM)

FEM

-Appendix D Requirements
Monitoring Type

Highest Concentrations

Monitoring Scale

Middle

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

Probe Inlet Height

5 meters

Airflow Arc

360º

Probe Sample Line Material

N/A

Pollutant Sample Residence Time

N/A

Distance from Supporting Structure

2.6 meters

Distance from Obstructions

None

Distance to Furnace Flue

None

Spacing from Trees

None

Nearest Major Roadway

Broadway Road

Distance and Direction to Road

37 meters, SE

Traffic Count (ADT)

Unknown

Groundcover

Gravel

WEST PHOENIX
FINAL - 2014 Air Monitoring Network Plan

Page 129 of 139

Maricopa County Air Quality Department

County ID: WP
AQS ID: 04-013-0019
Address: 3847 W Earll, Phoenix
Coordinates: 33.48385N, -112.14257W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant
Sampling Schedule

O3

CO

Continuous

Analysis Method (filter
samples only)
Any Proposal to Remove or
Move Monitor?
Is site suitable for comparison
to PM2.5 NAAQS per Part
58.30?

NO2

Continuous

PM10

Continuous

PM2.5

PM2.5

Continuous

1 in 12 days

Continuous
N/A

N/A

N/A

N/A

N/A

As per 40 CFR
Part 50,
Appendix L

No

No

No

No

No

No

N/A

N/A

N/A

N/A

Yes

Yes

27

27

27

26

-Appendix A Requirements
# Precision Checks Performed
Annually
# Accuracy Audits Performed
Annually &
Date of Last 2014 Check on
Gaseous Analyzers &
Last Two 2014 Checks for PM
All Precision/Accuracy Reports
Submitted to AQS?
Annual Data Certification
Submitted?
Frequency of One-Point QC
Check
Frequency of Flow Rate
Verification

4

11/18/14

2

12/02/14

4

09/09/14

2

02/12/14
08/26/14

30
(collocated QA
samples)
2

05/15/14
12/23/14

26

4

02/12/14
08/26/14

Yes

Yes

Yes

Yes

Yes

Yes

Submitted
May 2015

Submitted
May 2015

Submitted May
2015

Submitted
May 2015

Submitted May
2015

Submitted
May 2015

Bi-Weekly

Bi-Weekly

Bi-Weekly

N/A

N/A

N/A

N/A

N/A

N/A

Bi-Weekly

Every 6 weeks

Bi-Weekly

API M400
(087)

API M300
(093)

API M200
(099)

BAM 1020
(122) / TEOM
1400AB (079)

THERMO
2025

BAM 1020
(170)

Date Established

01/01/84

01/01/84

05/24/90

02/01/88

06/13/00

09/01/05

Classification

SLAMS

SLAMS

SLAMS

SLAMS

SLAMS

SLAMS

FEM

FRM

FRM

FEM

FRM

FEM

Monitoring Type

Population
Exposure

Population
Exposure

Population
Exposure

Population
Exposure

Highest
Concentration

Highest
Concentration

Monitoring Scale

Neighborhood

Neighborhood

Neighborhood

Neighborhood

Neighborhood

Neighborhood

Sampling Season

Jan-Dec

Jan-Dec

Jan-Dec

Jan-Dec

Jan-Dec

Jan-Dec

Yes

Yes

Yes

Yes

Yes

Yes

N/A

N/A

N/A

N/A

2.3 meters

N/A

4.3 meters

4.3 meters

4.3 meters

2.7 meters

2.8 meters

3.6 meters

-Appendix C Requirements
Sampler Make & Model

Method (FRM, FEM, ARM)
-Appendix D Requirements

Network Meets Minimum
Number of Monitors Required?
-Appendix E Requirements
Distance between collocated
samplers
Probe Inlet Height

FINAL - 2014 Air Monitoring Network Plan

Page 130 of 139

Maricopa County Air Quality Department

-General Information
Pollutant
Airflow Arc

O3

CO

NO2

PM10

PM2.5

PM2.5

360º

360º

360º

360º

360º

360º

Teflon

Teflon

Teflon

N/A

N/A

N/A

4.4 seconds

4.4 seconds

4.4 seconds

N/A

N/A

N/A

1.3 meters

1.3 meters

1.3 meters

3 meters

2.6 meters

2.5 meters

Distance from Obstructions

None

None

None

None

11 meters

None

Distance to Furnace Flue

None

None

None

None

None

None

Spacing from Trees

None

None

None

None

None

None

Thomas

Thomas

Thomas

Thomas

Thomas

Thomas

Probe Sample Line Material
Pollutant Sample Residence
Time
Distance from Supporting
Structure

Nearest Major Roadway
Distance and Direction to Road

360 meters, S

360 meters, S

360 meters, S

360 meters, S

360 meters, S

360 meters, S

Traffic Count (ADT)

29,000

29,000

29,000

29,000

29,000

29,000

Groundcover

Gravel

Gravel

Gravel

Gravel

Gravel

Gravel

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Maricopa County Air Quality Department

ZUNI HILLS

County ID: ZH
AQS ID: 04-013-4016
Address: 10851 West Williams Rd., Sun City
Coordinates: 33.68674N, -112.29417W
Metropolitan Statistical Area (MSA): 6200 Phoenix-Mesa
-General Information
Pollutant

PM10

Sampling Schedule

Continuous

Analysis Method (filters only)

N/A

Any Proposal to Remove or Move Monitor?

Shutdown June-August 2014

Is site suitable for comparison to PM2.5 NAAQS per Part 58.30?

N/A

-Appendix A Requirements
# Precision Checks Performed Annually

21

# Accuracy Audits Performed Annually &
Date of Last Two 2014 Checks for PM

2

All Precision/Accuracy Reports Submitted to AQS?

Yes

Annual Data Certification Submitted?

Submitted May 2015

Frequency of One-Point QC Check

N/A

Frequency of Flow Rate Verification

Bi-Weekly

05/01/14
10/29/14

-Appendix C Requirements
Sampler Make & Model

TEOM 1400AB (079)

Date Established

12/01/09

Classification

SPM

Method (FRM, FEM, ARM)

FEM

-Appendix D Requirements
Monitoring Type

Population Exposure

Monitoring Scale

Neighborhood Scale

Sampling Season

Jan-Dec

Network Meets Minimum Number of Monitors Required?

Yes

-Appendix E Requirements
Distance between collocated samplers

N/A

Probe Inlet Height

2.3 meters

Airflow Arc

360º

Probe Sample Line Material

N/A

Pollutant Sample Residence Time

N/A

Distance from Supporting Structure

2.6 meters

Distance from Obstructions

None

Distance to Furnace Flue

None

Spacing from Trees

None

Nearest Major Roadway

Williams Rd

Distance and Direction to Road

200 meters, N

Traffic Count (ADT)

Unknown (residential street)

Groundcover

FINAL - 2014 Air Monitoring Network Plan

Lawn/Dirt

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Maricopa County Air Quality Department

APPENDIX III - PUBLIC NOTICE AND COMMENT INFORMATION

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Maricopa County Air Quality Department

Public Notice Period
To fulfill the requirements of 40 CFR Part 58, §58.10, the MCAQD posted a draft copy of this
Network Review on our website on July 31, 2015 and held a Network Review Public Information
Workshop on September 3, 2015 at 1:00 p.m. The outlets used to notify the public of this network
review and associated workshop were:
• the MCAQD’s website,
• by electronic feed to MCAQD subscribers, and
• the Arizona Republic, a newspaper of general circulation in Maricopa County.
Public Notice Announcement Language
The public notice read as follows:

The Maricopa County Air Quality Department will hold a public meeting to discuss its 2014 Air
Monitoring Network Plan (AMNP) on September 3, 2015 at 1:00 p.m. at the Air Monitoring
Division’s office located at: 2145 S. 11th Ave. Suite 170, Phoenix, AZ 85007. The purpose of the
meeting is to receive comments from the public on the draft ANMP. Members of the public may
comment in person at the meeting or through written statements to the department.
The AMNP reports the ambient air monitoring activity captured by the department’s 25 air
monitoring sites throughout Maricopa County in 2014. The AMNP provides a summary of the
airborne pollutants measured, the air monitoring network design, air monitoring site details, and
statistical analyses of pollutant data from 2014 among other information. Additional information
on the draft AMNP may be obtained by contacting Ben Davis at: 2145 S. 11th Avenue #170,
Phoenix, AZ 85007 or (602) 258-5155, ext. 221.
An electronic copy of the draft AMNP is currently available on the department’s website at:
http://www.maricopa.gov/aq/divisions/monitoring/network.aspx.
Hard copies of the document may be requested from the department’s Records Management
Coordinator at (602) 506-6201 or at the department's address: 1001 North Central Avenue,
Phoenix, Arizona 85004. Arrangements may be made to view the information every Monday
through Friday (excluding major holidays) between 8:00 a.m. and 4:30 p.m. There is a small fee
for copying available documents.
Written comments must state the name and mailing address of the person making comment and be
signed by that person, an authorized agent, or attorney. Written comments may be mailed to the
Air Monitoring Division’s address shown above or emailed to: bdavis@mail.maricopa.gov. All
comments are due to the department by 5:00 p.m. on September 3, 2015.
A sign language and/or Spanish interpreter will be made available upon request with a 72-hour
notice. Additional reasonable accommodations will be made available to the extent possible
within the timeframe of the request.

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Maricopa County Air Quality Department

News Release
The following is a copy of the news release that was advertised in the following newspapers: the
Arizona Gazette and the Record Recorder. In addition, the public announcement was posted on the
MCAQD’s website.

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Maricopa County Air Quality Department

Public Comments Received
The MCAQD received comments from the MAG regarding some changes needed in the draft ANMP. The comments were:

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Maricopa County Air Quality Department

FINAL - 2014 Air Monitoring Network Plan

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Maricopa County Air Quality Department

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Maricopa County Air Quality Department

Response to Public Comments
All comments received by MAG were addressed in the final draft prior to submitting to EPA.
Public Meeting Attendance

DRAFT – 2014 Air Monitoring Network Plan

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Maricopa County Air Quality Department