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Home My WebLink AboutDAQ-2025-0025181 Division of Air Quality Annual Monitoring Network Plan 2025 2 Table of Contents List of Tables ......................................................................................................................................3 List of Figures .....................................................................................................................................4 GLOSSARY .........................................................................................................................................5 EXECUTIVE SUMMARY .......................................................................................................................6 Statement of Compliance ...................................................................................................................6 Primary Monitor Designation .............................................................................................................6 Network Changes ...............................................................................................................................7 1.1 Utah Air Quality Monitoring Network ........................................................................................ 10 1.2 Criteria Pollutants DAQ Network ................................................................................................ 16 1.2.1 Particulate Matter-Fine (PM2.5) ......................................................................................... 16 1.2.2 Particulate Matter (PM10) ................................................................................................... 16 1.2.3 Ozone (O3) ........................................................................................................................... 16 1.2.4 Sulfur Dioxide (SO2) ............................................................................................................. 16 1.2.5 Nitrogen Dioxide (NO2) ....................................................................................................... 16 1.2.6 Carbon Monoxide (CO) ....................................................................................................... 16 1.2.7 Lead (Pb) ............................................................................................................................. 17 1.3 Chemical Speciation (CSN) .......................................................................................................... 17 1.4 Multipollutant Monitoring Network (NCore) ............................................................................. 18 1.5 Photochemical Assessment Monitoring System (PAMS) ............................................................ 18 1.6 Air Toxics Trends ......................................................................................................................... 19 1.7 Mercury Deposition Network ..................................................................................................... 20 1.8 Meteorological Monitoring Network .......................................................................................... 21 Appendix A- List of equipment used at the DAQ monitoring sites. ..................................................... 22 Appendix A- List of equipment used at the DAQ monitoring sites (cont.). .......................................... 23 Appendix B- Site Information ........................................................................................................... 24 Response to Public Comments .......................................................................................................... 72 3 List of Tables Table 1. List of designated PM2.5 primary monitors for 2024. ...................................................................... 7 Table 2. List the recently implemented monitoring site changes to the air monitoring network. ............. 9 Table 3. List the proposed monitoring site changes to the air monitoring network. .................................. 9 Table 4. Utah Air Monitoring Network Site Locations. ............................................................................... 13 Table 5. Measured parameters at the sampling stations in Utah Air Monitoring Network. ...................... 15 Table 6. List of parameters measured at the DAQ monitoring CSN sites. .................................................. 17 Table 7. List of PAMS VOCs and Carbonyls measured at the DAQ PAMS site. ........................................... 19 Table 8. List of toxics measured at the DAQ NATTS site. ............................................................................ 20 4 List of Figures Figure 1. Map of Utah showing the location of all monitoring sites in Utah Air Monitoring Network. ..... 14 Figure 2. Markes/Agilent autoGC................................................................................................................ 18 5 GLOSSARY DAQ Division of Air Quality AQS Air Quality System (EPA database) BC Black Carbon CBSA Core-Based Statistical Area CFR Code of Federal Regulations CO Carbon monoxide CSN Chemical Speciation Network EMP Enhanced Monitoring Plan EPA U.S. Environmental Protection Agency FEM Federal Equivalent Method FRM Federal Reference Method LHD Local Health Department MSA Metropolitan Statistical Area NAAQS NASA National Ambient Air Quality Standards The National Aeronautics and Space Administration NATTS National Air Toxics Trends Stations NCore National Core multi-pollutant monitoring stations NO Nitric oxide NO2 Nitrogen dioxide NOx Reactive nitrogen oxides NOy Total reactive nitrogen O3 Ozone PAMS Photochemical Assessment Monitoring Stations PAHs Polycyclic aromatic hydrocarbons PM2.5 Particulate matter with an equivalent diameter less than or equal to 2.5 μm PM10 Particulate matter with an equivalent diameter less than or equal to 10 μm ppb Parts per billion (one part in 109) ppm Parts per million (one part in 106) SIP State Implementation Plan SLAMS State or Local Air Monitoring Stations SO2 Sulfur dioxide SPM Special Purpose Monitor μg Microgram (10-6 grams) VOC Volatile Organic Compound 6 EXECUTIVE SUMMARY Each year, the Air Monitoring Section of the Division of Air Quality (DAQ) produces a Monitoring Network Plan in accordance with federal regulations (40 CFR § 58.10). This document informs stakeholders, including the public, private sector, and government about the current state and upcoming changes to the State’s Air Monitoring Network, which operates in compliance with the Code of Federal Regulations (40 CFR § 58). DAQ continually seeks input from the aforementioned parties on improvements to the current level of service or to provide additional accommodations where requested and needed. The Annual Monitoring Network Plan reflects the network changes DAQ implements to enhance the quality, coverage, reliability, and cost efficiency of the division’s monitoring efforts. Statement of Compliance According to the requirement of 40 CFR 58, Subpart B, all stations and monitors deployed within Utah’s Air Quality Monitoring Network meet the requirements of appendices A, C, D, and E of the aforementioned subpart. As of 2024, Utah’s Air Quality Monitoring Network has no active Prevention of Serious Deterioration (PSD) air monitoring program stations; Appendix B does not apply to any stations or monitors in Utah because this appendix pertains to PSD air monitoring stations. Primary Monitor Designation A primary monitor is defined as the one “identified by the monitoring organization that provides concentration data used for comparison to the NAAQS. For any specific site, only one monitor for each pollutant can be designated in AQS as primary monitor for a given period of time. The primary monitor identifies the default data source for creating a combined site record for purposes of NAAQS comparisons.” (40 CFR 58.1). Each year, DAQ carefully chooses and designates suitable primary monitors for each monitoring station and each pollutant according to data completeness and integrity. The primary monitors are designated prior to data certification in Q1 of the following year during the regular QC process. Federal Equivalent Method (FEM) PM2.5 monitor data was not used prior to January 1, 2015, as it did not meet quality assurance requirements. As of January 1, 2015, FEM PM2.5 monitoring was used for data substitution and co-locations as required in 49 CFR Part 50 Appendix N and 40 CFR Part 58 Appendix A 3.2. Table 1. lists the designated Parameter Occurrence Code (POC) for the primary monitor designations for the year 2024. 7 Table 1. List of designated PM2.5 primary monitors for 2024. Site ID Site Name Method Primary Co-Located with POC 49-03-0005 Brigham City #3 145 1 - 49-05-0007 Smithfield 145 1 FRM, FEM 49-007-1003 Price 184 5 - 49-011-0004 Bountiful Viewmont 184 3 FEM 49-013-0002 Roosevelt 184 4 FRM, FEM 49-019-0007 Moab 184 1 - 49-021-0005 Enoch 184 1 - 49-035-2005 Copper View 145 1 FEM 49-035-3006 Hawthorne 145 1 FEM 49-035-3010 Rose Park 184 1 FRM, FEM 49-035-3013 Herriman #3 184 5 FEM 49-035-3014 Lake Park 184 1 - 49-035-3015 Environmental Quality 184 3 FRM 49-035-3016 Prison 184 1 - 49-035-3018 Red Butte 184 3 - 49-035-4002 Near Road 145 3 FEM 49-045-0004 Erda 184 3 FRM 49-047-1004 Vernal #4 184 4 FRM 49-049-4001 Lindon 145 1 FRM, FEM 49-049-5010 Spanish Fork 145 1 FEM 49-051-0001 Heber 145 1 FEM 49-053-0007 Hurricane 184 3 - 49-057-1003 Harrisville 184 3 FRM Network Changes Changes to the Utah’s Air Quality Monitoring Network are intended to improve the effectiveness of monitoring efforts and to ensure compliance with the EPA National Ambient Air Monitoring Strategy.  Current and future monitoring activities and/or sites are required in the Wasatch Front to meet the Enhanced Monitoring Plan (EMP) requirements as the Wasatch Front was re-designated to serious nonattainment status for ozone. The DAQ is developing an Enhanced Monitoring Plan (EMP) in fulfillment of federal regulations, 40 CFR Part 58, Appendix D 5(h). These regulations, require that any states with any area designated moderate and above 8-hour O3 nonattainment, and any state within the Ozone Transport Region (OTR), develop, implement, and submit an EMP for O3 to the regional office of the Environmental Protection Agency (EPA) no later than October 1, 2019, or two years following the effective date of a designation to a classification 8 of moderate or above O3 nonattainment. The EMP is intended to provide monitoring organizations the flexibility to implement any additional monitoring beyond the minimum requirements for the State and Local Air Monitoring Stations (SLAMS) to complement the needs of their area. The DAQ, with input from the Technical Analysis, Section SIP modelers, and the Air Monitoring Section, identified additional measurements needed and the most strategic sampling locations to better understand ozone formation and transport in the Wasatch Front non-attainment area. As part of the Enhanced Monitoring Plan (EMP), hourly averaged measurements of speciated volatile organic compounds (VOCs) (PAMS target list compounds), Cavity Attenuated Phase Shift (CAPS) Spectroscopy True NO₂, and total reactive nitrogen (NOY) are planned for six sites along the Wasatch front and are currently being reported for Bountiful (BV), Erda (ED), Red Butte (RB) and Lake Park (LP). Additionally, hourly averaged speciated VOC measurements are collected at the Environmental Quality (EQ) station. A sixth site is still being planned for a location to be determined (TBD) toward the south end of the valley. Hourly averaged measurements of mixing height, formaldehyde, and hydrogen chloride have been implemented at selected sites (see table below) to support O₃ local air quality modeling and O3 research studies. Hourly averaged mixing layer height data collected at the PAMS site (HW) has been sent to the Unified Ceilometer Network (UCN). In the near future, data from stations operating complementary equipment to meet EMP requirements will also be sent to the UCN (https://ucn-portal.org/) These additional measurements, conducted year-round as part of the EMP, will be reviewed to confirm that the location remains optimal.  The data loggers at the network sites are being replaced with a digital data logging system. This new system is based on the Campbell Scientific CR6 platform and collects data using the Modbus protocol. Main advantages of the digital system include increased flexibility in scheduling PZS sequences and the elimination of issues common to analog data collection, such as overrange events, calibration imprecisions, and voltage irregularities caused by power disruptions. Additionally, the digital platform enables the collection of diagnostic data from gaseous and particulate monitoring instruments. This diagnostic information helps operators identify and resolve instrument malfunctions more quickly, reducing downtime and minimizing data loss or invalidation. Digital loggers are now in use at 14 of the 23 stations. These stations are: Brigham City (BG), Bountiful (BV), Copperview (CV), Herriman (H3), Heber (HB), Lake Park (LP), Moab (M7), Near Road (NR), Price (P2), Red Butte (RB), Rose Park (RP), Spanish Fork (SF), Smithfield (SM), and Prison (ZZ). The rest of the stations will be upgraded to the CR6 loggers as resources permit. All changes and additions to the monitoring network are contingent upon the availability of necessary resources and the approval of EPA, and are summarized in Table 2, Table 3 and the section following Table 3. 9 Table 2. List the recently implemented monitoring site changes to the air monitoring network. County Station Name Comment Box Elder Brigham City (BG) As part of the Salt Lake Dust Study, filter-based PM₁₀ measurements began in February 2025 Davis Bountiful (BV) Non-regulatory hourly-averaged formaldehyde and hydrogen chloride measurements began in Spring 2024. Hourly-averaged speciated volatile organic compounds (VOCs) from the PAMS target list measurements began in Summer 2024. As part of the Salt Lake Dust Study, filter-based PM₁₀ measurements began in mid-September 2024 Salt Lake Environmental Quality (EQ) Non-regulatory hourly-averaged formaldehyde measurements are available for all of 2024 Hawthorne (HW) Non-regulatory hourly-averaged formaldehyde measurements are available for all of 2024 Lake Park (LP) This station is part of the Enhanced Monitoring Plan (EMP) and includes measurements of hourly-averaged speciated volatile organic compounds (VOCs) from the PAMS target list. Hourly-averaged speciated VOCs are expected to begin reporting by Summer 2025 As part of the Salt Lake Dust Study, filter-based PM₁₀ measurements began in mid-September 2024 Red Butte (RB) Non-regulatory hourly-averaged formaldehyde measurements are available for all of 2024 Prison (ZZ) Non-regulatory hourly-averaged Hydrogen chloride measurements are available for all 2024 Non-regulatory hourly-averaged formaldehyde measurements began in August 2024 As part of the Salt Lake Dust Study, filter-based PM₁₀ measurements began in mid-September 2024 Saltair (SA) This Met station was removed on January 16, 2024 Wasatch Heber Station fully operational as of August 1, 2024, measuring PM2.5 (continuous and filter-based), O3, and NO2. PM2.5 filter sampling began at September 2024 Tooele Erda (ED) Non-regulatory hourly-averaged formaldehyde and hydrogen chloride measurements are available for all of 2024 Table 3. List the proposed monitoring site changes to the air monitoring network. County Station Name Comment Summit Summit The DAQ in coordination with the Local Health Department (LHD), local officials and DAQ modelers and have selected a site and are working on resolving all permit and power requirements. This station is expected to be fully operational by Q4 of 2025. 10 As part of a grant funded through the Inflation Reduction Act (IRA), DAQ is working to expand air monitoring efforts across the state. This includes planning for new monitoring stations in several regions: West Davis County, Utah County, Cache County, the West Desert, and North Salt Lake. These new stations will improve air quality coverage and help track dust and pollution more effectively. Each general location has been selected based on specific needs. For example, one site will monitor dust from dry lakebeds, others are being considered in anticipation of possible changes to existing monitoring stations, and others will enhance coverage in growing communities and industrial areas. These efforts will provide a clearer picture of air pollution across Utah. Work is underway to identify the most suitable final locations, though specific timelines and further details are still being developed. In addition, DAQ is evaluating the potential reuse of two former monitoring sites, Syracuse Causeway and Beach Marina, near the Great Salt Lake to support dust monitoring. Additionally, while not a monitoring site, the Division has purchased a building in Vernal to be used as a field office and work space for monitoring activities conducted by staff living in the area. Work is underway to update the space to our needs. As part of the GSL dust concern additional monitoring is being anticipated and will likely result in additional monitoring around the lake and in other parts of the state once details and resources are solidified. 1.1 Utah Air Quality Monitoring Network The Air Quality Monitoring Network currently operates monitors at 25 locations statewide. Two of these monitoring sites were established in accordance with Utah Senate Bill 144, which directs the Department of Environmental Quality to set up and maintain monitoring facilities to assess the environmental impact of the Inland Port development project. These sites are the Lake Park site (LP) and the new Prison site (ZZ) Most of the Utah DAQ sites and monitors are identified as SLAMS. SLAMS monitors meet specific siting and quality assurance criteria defined in federal regulations. DAQ also operates some monitors identified as SPMs, which are used to fulfill very specific and usually short-term monitoring goals. SPM monitors are also required to meet certain federal regulations established in 40 CFR Part 58, Appendix A. If they operate for more than two years, their data can be used by the U.S. EPA to determine compliance with the NAAQS. The DAQ monitoring stations are strategically located to measure both local and regional levels of air pollutants, including particulate matter (PM), gaseous pollutants, and meteorological variables. Currently, PM2.5 is measured at 23 locations, PM10 at ten locations, O3 at 23 locations, NOX/NO/NO2 at 23 locations, CO at seven locations, and SO2 at four locations Of the 23 PM2.5 monitoring sites, 15 use filter-based equipment. Similarly, 7 of the 10 PM10 sites also use filter-based equipment, including four that are part of the Dust Study. All PM2.5 sites with filter-based measurements are also equipped with continuous monitors, while six of the 10 PM10 sites have continuous monitors. Only the PM10 filter base instruments at Hathorne (HW), Environmental Quality (EQ) and the two at Roosevelt which run daily continuously during the year can be used to determine the NAAQS because the ones as part of the dust project are running during February 1 through September 30. 11 Of the 23 PM2.5 monitoring sites, 15 use filter-based equipment. Similarly, seven of the 10 PM10 sites use filter-based monitors, including four that are part of the Dust Study. All PM2.5 sites with filter-based measurements are also equipped with continuous monitors, while six of the 10 PM₁₀ sites have continuous monitors. Please note that only the PM10 filter-based instruments at Hawthorne (HW), Environmental Quality (EQ), and the two at Roosevelt, which operate year-round, along with the continuous monitors, can be used to determine compliance with the NAAQS. The PM10 filter-based monitors associated with the Dust Study operate only from February 1 through September 30. Meteorological parameters, including wind speed, wind direction, temperature, relative humidity, and solar radiation, are measured at most sampling sites. The location and elevation of the monitoring sites, the EPA Air Quality System (AQS) site codes, and the measured variables at each station are provided in Table 4 and Table 5. A Map of Utah showing the location of all monitoring sites in the DAQ monitoring Network is displayed in Figure 1. Moreover, the network includes stations that participate in several EPA monitoring programs, including the National Core (NCore), Speciation Trends Network (STN), Chemical Speciation Network (CSN), Photochemical Assessment Monitoring Stations (PAMS), National Air Toxics Trends (NATTS), Ammonia Monitoring Network (AMoN), and Near-road Monitoring station. Data collected at these stations is primarily used for the following objectives: • Evaluating population exposure to air pollutants • Tracking the spatial distribution of air pollutants • Assessing historical trends in air pollution • Supporting compliance with ambient air quality standards (primary and secondary) • Supporting air quality models and research studies • Informing the general public of air pollution levels via mobile apps and web pages • Developing State Implementation Plans (SIPs) and legislative air pollution control measures • Tracking the effectiveness of air pollution control strategies • Activating control measures during high air pollution episodes, such as restricting wood burning during winter-time inversions • Monitoring of specific emission sources and air pollutants • National monitoring goals and studies The sampling sites are strategically located to meet the monitoring objectives outlined above. For instance, some sites are selected to measure PM concentrations in highly populated areas while others are chosen to assess the extent of ozone transport and its precursors into the Wasatch Front and the Uinta Basin. The DAQ is continually working to optimize the monitoring instruments in its network. 12 A list of the methods and equipment used to measure the parameters in the network is provided in Appendix A, while Appendix B includes the monitoring instrument list, site-specific objectives, spatial scale, measured parameters, sampling frequency, and methods. 13 Table 4. Utah Air Monitoring Network Site Locations. County AQS code Station Name Station Address Latitude Longitude Elevation (meters) Cache 49-005-0007 Smithfield (SM) 675 West 220 North, Smithfield 41.84267 -111.852064 1379 Box Elder 49-003-0005 Brigham City (BG) 350 West 1175 South, Brigham City 41.485039 -112.021484 1316 Weber 49-057-1003 Harrisville (HV) 425 West 2550 North, Harrisville 41.302685 -111.986476 1320 Davis 49-011-0004 Bountiful (BV) 171 West 1370 North, Bountiful 40.902945 -111.884505 1309 49-011-6001 Antelope Island (AI) Great Salt Lake 41.039404 -112.231541 1355 Salt Lake 49-035-2005 Copperview (CV) 8449 South Monroe St., Midvale 40.597911 -111.894162 1343 49-035-3015 Environmental Quality (EQ) 1950 West 240 North, Salt Lake City 40.777028 -111.94585 1284 49-035-3006 Hawthorne (HW) 1675 South 600 East, Salt Lake City 40.734367 -111.872221 1308 49-035-3013 Herriman #3 (H3) 14058 Mirabella Drive, Herriman 40.496412 -112.036329 1534 49-035-3014 Lake Park (LP) 2782 South Corporate Park Dr., West Valley City 40.709905 -112.008684 1295 49-035-4002 Near Road (NR) 5001 South Galleria Dr, Murray 40.662868 -111.901874 1305 49-035-3018 Red Butte (RB) 2195 Red Butte Canyon Rd., Salt Lake City 40.76656 -111.828 1517 49-035-3010 Rose Park (RP) 1400 West Goodwin Ave., Salt Lake City 40.795514 -111.930996 1283 49-035-3016 Prison Site (ZZ) 1480 North 8000 West 40.80793 -112.087772 1287 Wasatch 49-051-0001 Heber (HB) Heber City Site #1 Water Conservation District lot, 626 E 1200 S Heber City 40.497962 -112.036329 1524 Utah 49-049-4001 Lindon (LN) 50 North Main St., Lindon 40.339505 -111.713486 1444 49-049-5010 Spanish Fork (SF) 2050 N. 300 W., Spanish Fork (airport) 40.136369 -111.658011 1380 Tooele 49-045-0004 Erda (ED) 2135 West Erda Way, Erda 40.600565 -112.355782 1321 49-045-6001 Badger Island (BI) Great Salt Lake 40.94212 -112.561943 1285 Duchesne 49-013-0002 Roosevelt (RS) 290 South 1000 West, Roosevelt 40.294175 -110.008961 1585 Uintah 49-047-1004 Vernal #4 (V4) 600 North 1650 West, Vernal 40.464812 -109.560731 1667 Carbon 49-007-1003 Price #2 (P2) 351 South 2500 East, Price 39.595749 -110.770097 1737 Iron 49-021-0005 Enoch (EN) 201 Thoroughbred Way, Enoch 37.747409 -113.055482 1693 Grand 49-019-0007 Moab (M7) 691 S Mill Creek Dr. Moab 38.566055 -109.537167 1259 Washington 49-053-0007 Hurricane (HC) 147 North 870 West, Hurricane 37.179138 -113.305105 992 14 Figure 1. Map of Utah showing the location of all monitoring sites in Utah Air Monitoring Network. 15 Table 5. Measured parameters at the sampling stations in Utah Air Monitoring Network. County Site PM2.5 PM10 PM C o a r s e Sp e c i a t i o n P M 2. 5 O3 NO X NO 2 NO Tru e N O 2 NO y SO 2 CO NH 3 To x i c s Ca r b o n y l s VO C s P A M S Fo r m a l d e h y d e ( H C H O ) * HC L * BC ME T FR M Co -lo c a t e d (F R M ) Re a l -ti m e Co -lo c a t e d (R e a l -ti m e ) FR M Co -lo c a t e d Re a l -ti m e Cache Smithfield 1/1 1/1 X X 1/6 X X X X Box Elder Brigham City 1/1 X 1/1 X X X Weber Harrisville 1/1 X X X X X X Davis Bountiful 1/1 X 1/1 1/6 X X X X X X X X X X X Antelope Island X Salt Lake Copperview 1/1 X X X X X X Environmental Quality 1/1 X 1/1 X X X X X X X X X X Hawthorne 1/1 X X 1/1 X X 1/3 X X X X X X X X X X Herriman #3 X X X X X X Lake Park X 1/1 X X X X Near Road 1/1 X X X X X Red Butte X X X X X X X Rose Park 1/1 1/1 X X X X X X Prison X 1/1 X X X X X X Tooele Erda 1/1 X X X X X X X X X Badger Island X Wasatch Heber 1/1 X X X X Utah Lindon 1/1 1/6 X X 1/6 X X X X X Spanish Fork 1/1 X X X X Uintah Vernal 1/1 X X X X Duchesne Roosevelt 1/1 X X 1/1 1/6 X X X X X Carbon Price #2 X X X X Iron Enoch X X X X Grand Moab X X X X Washington Hurricane X X X X *Non-regulatory monitor; sites in italic font corresponds to remote stations; 1/1 are sampled daily; 1/3 are sampled every three days; 1/6 are sampled every sixth day. Note: Co-located means an additional monitor(s) that can either be of the same type or of a different type. It can be an FRM and an FEM or a pair of FRM's or a pair of FEM's or in some cases it may also mean a third or fourth monitor at the same location. 16 1.2 Criteria Pollutants DAQ Network 1.2.1 Particulate Matter-Fine (PM2.5) DAQ currently operates 24-hour Federal Reference Method (FRM) and Federal Equivalent Method (FEM) PM2.5 samplers throughout the state to demonstrate compliance with the National Ambient Air Quality Standards (NAAQS), evaluate population exposure, support SIP development, and model performance evaluation as well as monitor PM levels in source and receptor areas. The DAQ currently uses 15 FRM PM2.5 monitors and FEM continuous PM2.5 samplers at 23 sampling sites distributed throughout the state. Some continuous monitors operate in co-location with FRM filter-based measurements for comparability assessment. Data obtained from the continuous monitors is used to support forecasting, mobile apps, web pages, and reporting the Air Quality Index (AQI) information at the AIRNow website (www.airnow.gov). 1.2.2 Particulate Matter (PM10) The DAQ currently operates eight 24-hour FRM PM10 samplers throughout the state and six FEM continuous PM10 samplers. 1.2.3 Ozone (O3) DAQ currently operates ten ozone monitors in Salt Lake County, two in Utah County, and one each in Davis, Weber, Box Elder, Cache, Wasatch, Uintah, Duchesne, Carbon, Iron, Grand, and Washington counties. 1.2.4 Sulfur Dioxide (SO2) The DAQ currently operates four SO2 monitors within the Salt Lake County. The monitor at HW was designated as population-oriented and satisfies NCore requirements. 1.2.5 Nitrogen Dioxide (NO2) The DAQ currently operates NO2 monitors in 23 out of the 25 monitoring stations that are presently operational. Although Utah has demonstrated compliance with NO2 standards, DAQ maintains NO2 monitoring at many sites since emissions of this pollutant can lead to increased O3 levels and PM2.5 formation, often resulting in pollution levels exceeding the NAAQS. 1.2.6 Carbon Monoxide (CO) The DAQ currently operates a total of seven CO monitors, five in Salt Lake County and one each in Utah and Weber counties. These monitors assess population exposure to emissions from anthropogenic activities and support CO maintenance plans. EPA’s minimum requirements for CO monitoring include placing monitors near roadways in certain urban areas to assess CO concentrations associated with traffic emissions. Additionally, co-location of CO monitors with near-roadway nitrogen dioxide (NO₂) monitoring sites is required. To meet these requirements, a CO monitor is located along I-15 at 5001 South Galleria Drive in Murray, at the Near-Road (NR) site. Finally, CO monitors also support model performance. 17 1.2.7 Lead (Pb) Historically, major sources of lead emissions came from combustion of leaded fuel as on-road motor vehicle fuel emissions. However, given that leaded gasoline for automobiles was completely eliminated by the end of 1995 in the U.S., the only sources of lead in Utah include extraction and processing of metallic ores as well as piston-engine aircrafts’ emissions. On November 12, 2008, the EPA revised the primary and secondary NAAQS for lead to 0.15 µg/m³ in total suspended particles (TSP). This updated standard is ten times lower than the previous standard of 1.5 µg/m³, which was issued by the EPA in 1978. To comply with the standard, a rolling three-month average lead concentration must not exceed 0.15 µg/m³. The State of Utah has been in compliance with the lead NAAQS since 1982, and in 2005, the EPA authorized the discontinuation of lead monitoring in the state. However, following the establishment of new lead monitoring requirements by the EPA in 2008 and 2010, DAQ resumed lead monitoring at Magna, a site near the Kennecott copper smelter, from 2010 until June 2017. Due to the extremely low concentrations observed, the EPA approved the discontinuation of monitoring at this site in 2017. This waiver is now expired and we will be moving forward with a new waiver application. Moving forward, DAQ and the EPA will continue to monitor the requirements, including source emission thresholds, population changes, and any revisions to the NAAQS that may trigger the need to resume lead monitoring in Utah. Additionally, the DAQ will assess any new or existing lead sites with changes in emission levels to determine if further monitoring is necessary. 1.3 Chemical Speciation (CSN) The DAQ currently operates four PM2.5 chemical speciation sites, including Hawthorne (HW), Bountiful Viewmont (BV), Lindon (LN), and Smithfield (SM). HW site in Salt Lake County is an EPA-designated CSN monitoring station, operating on a 1-in-3-day sampling schedule. BV in Davis County, LN in Utah County, and SM in Cache County are SLAMS PM2.5 speciation sites, operating on a 1-in-6-day sampling schedule. Data from the speciation network is primarily used to determine PM2.5 chemical composition and sources as well as the spatial and temporal variation in its components. There are over 50 species consisting of ions, elements, and carbon species reported by the CSN sites. A list of parameters measured in the CSN sites are provided in Table 6. Table 6. List of parameters measured at the DAQ monitoring CSN sites. Parameter (Method) Compounds PM2.5 Speciation (Met One SASS/SuperSASS Nylon) Ammonium Ion, Sodium Ion, Potassium Ion, Nitrate Ion, Sulfate Ion 18 PM2.5 (Met One SASS/SuperSASS Teflon) Antimony, Arsenic, Aluminum, Barium, Bromine, Cadmium, Calcium, Chromium, Cobalt, Copper, Chlorine, Cerium, Cesium, Iron, Lead, Indium, Manganese, Nickel, Magnesium, Phosphorus, Selenium, Tin, Titanium, Vanadium, Silicon, Silver, Zinc, Strontium, Sulfur, Rubidium, Potassium, Sodium, Zirconium PM2.5 (URG 3000N w/Pall Quartz filter and Cyclone Inlet) Elemental carbon (E1 CSN, E2 CSN, E3 CSN, EC CSN TOR, EC CSN TOT). Organic carbon (OC1 CSN, OC2 CSN, OC3 CSN, OC4 CSN, OC CSN TOR, OC CSN TOT, OP CSN TOR), OP CSN TOT, TC CSN 1.4 Multipollutant Monitoring Network (NCore) The DAQ currently operates one multi-pollutant network NCore site, Hawthorne, located in Salt Lake County. This site is equipped with several advanced measurement systems to monitor PM (PM2.5 and PM10), ozone, NO2, true-NO2, trace levels of CO, SO2, total reactive nitrogen (NOy), carbonyl compounds, organic, and elemental carbon as well as meteorological parameters including the Mixing Layer Height. This site satisfies federal requirements for the Photochemical Assessment Monitoring Station (PAMS) network program. 1.5 Photochemical Assessment Monitoring System (PAMS) The DAQ currently operates one PAMS site at Hawthorne, located in Salt Lake County. The PAMS program is designed with the objective to produce an air quality database to be used to evaluate and refine ozone prediction models. In addition, the program will assist to identify and quantify the ozone precursors, establish the temporal patterns and associated meteorological conditions to assist and refine the control strategies. DAQ is measuring the following parameters at the PAMS required site: • Carbonyls • Meteorological parameters: ambient temperature, wind direction, wind speed, atmospheric pressure, relative humidity, precipitation, mixing layer height, solar radiation, and UV radiation • Speciated VOCs • True NO2 • NO/NOy • Ozone • Continuous Formaldehyde The DAQ-PAMS site collects hourly speciated VOC measurements with a Markes/Agilent autoGC (Figure 2) which operates on a year-round basis. Carbonyl species are collected in a three 8-hour averaged samples per day on a 1-in-3-day schedule from June 1 to August 31 and 1 in 24-hour on a 1-in-3-day for the remaining part of the year. The list of the speciated VOCs and carbonyls measured at the site are listed in Table 7. Figure 2. Markes/Agilent autoGC. 19 Table 7. List of PAMS VOCs and Carbonyls measured at the DAQ PAMS site. Parameter Compounds VOCs Total NMOC (non-methane organic compound), n-Dodecane, Ethane, Ethylene, Propane, Propylene, Acetylene, n-Butane, Isobutane, trans-2-Butene,cis-2-Butene, 1,3-Butadiene, n- Pentane, Isopentane, 1-Pentene, trans-2-Pentene, cis-2-Pentene, 3-Methylpentane, n-Hexane, n-Heptane, n-Octane, n-Nonane, n-Decane, Cyclopentane, Isoprene, 2,2-Dimethylbutane, 1- Hexene, 2-Methyl-1-pentene, 2,4-Dimethylpentane, Cyclohexane, 3-Methylhexane, 2,2,4- Trimethylpentane, 2,3,4-Trimethylpentane, 3-Methylheptane, Methylcyclohexane, Methylcyclopentane, 2-Methylhexane, 1-Butene, 2,3-Dimethylbutane, 2-Methylpentane, 2,3- Dimethylpentane, n-Undecane, 2-Methylheptane, 2-Methylheptane, m/p Xylene, Benzene, Toluene, Ethylbenzene, o-Xylene, 1,3,5-Trimethylbenzene, 1,2,4-Trimethylbenzene, n- Propylbenzene, Isopropylbenzene, o-Ethyltoluene, m-Ethyltoluene, p-Ethyltoluene, m- Diethylbenzene, p-Diethylbenzene, Styrene, 1,2,3-Trimethylbenzene Carbonyls Formaldehyde, Acetaldehyde, Propionaldehyde, Butyraldehyde, Hexanaldehyde, Valeraldehyde, Crotonaldehyde, Acetone, Methyl ethyl ketone, Benzaldehyde 1.6 Air Toxics Trends The DAQ has been participating in the EPA-funded Urban Air Toxics Monitoring Program since 1999. In January 2003, the air toxics monitoring equipment was re-located from West Valley to Bountiful Viewmont (BV) in order to co-locate the air toxics monitors with PM2.5 speciation samplers, which would provide a more complete characterization of monitored air pollutants. 20 Currently, more than 90-VOCs, 10-carbonyls, 19-PAHs, and 11-metals are measured as part of the air toxics trends program. The samples are collected on a 1-in-6-day sampling schedule over a 24-hour period. The list of the air toxics measured at the site are listed in Table 8 Table 8. List of toxics measured at the DAQ NATTS site. Parameter Compounds VOCs Carbon disulfide, Propylene, Acetylene, Freon 114, 1,3-Butadiene, n-Octane, Methyl tert- butyl ether, Tert-amyl methyl ether, tert-Butyl ethyl ether, Ethyl acrylate, Methyl methacrylate, Acrolein, Methyl isobutyl ketone, Ethylene oxide, Acetonitrile, Acrylonitrile, Chloromethane, Dichloromethane, Chloroform, Carbon tetrachloride, Bromoform, Trichlorofluoromethane, Chloroethane, 1,1-Dichloroethane, Methyl chloroform, Ethylene dichloride, Tetrachloroethylene, Tetrachloroethylene, 1,1,2,2-Tetrachloroethane, Bromomethane, 1,1,2-Trichloroethane, 1,1,2-Trichloro-1,2,2-trifluoroethane, Dichlorodifluoromethane, Trichloroethylene, 1,1-Dichloroethylene, Bromodichloromethane, 1,2-Dichloropropane, trans-1,3-Dichloropropene, trans-1,3-Dichloropropene, cis-1,3- Dichloropropene, Dibromochloromethane, Chloroprene, Bromochloromethane, trans-1,2- Dichloroethylene, cis-1,2-Dichloroethene, Ethylene dibromide, Hexachlorobutadiene, Vinyl chloride, m/p Xylene, Benzene, Toluene, Ethylbenzene, o-Xylene, 1,3,5-Trimethylbenzene, 1,2,4-Trimethylbenzene, Styrene, Chlorobenzene, 1,2-Dichlorobenzene, 1,3- Dichlorobenzene, 1,4-Dichlorobenzene, 1,2,4-Trichlorobenzene. Total NMOC (non-methane organic compound), Ethane, n-dodecane, Ethylene, Propane, n-Butane, Iso-Butane, Trans-2- Butene,Cis-2-Butene,n-Pentane, Isopentane, 1-Pentene, trans-2-Pentene, trans-2-Pentene, cis-2-Pentene, 3-Methylpentane, n-Hexane, n-Heptane, n-Nonane, n-Decane, Cyclopentane, Isoprene, 2,2-Dimethylbutane, 1-Hexene, 2-Methyl-1-pentene, 2,4-Dimethylpentane, Cyclohexane, 3-Methylhexane, 2,2,4-Trimethylpentane, 2,3,4-Trimethylpentane, 3- Methylheptane, alpha-Pinene, beta-Pinene, Methylcyclopentane, Methylcyclohexane, 2- Methylhexane, 1-Butene, 2,3-Dimethylbutane, 2-Methylpentane, 2,3-Dimethylpentane, n- Undecane, 2-Methylheptane, n-Propylbenzene, Isopropylbenzene, o-Ethyltoluene, m-Ethyltoluene, p-Ethyltoluene, m-Diethylbenzene, p-Diethylbenzene, 1,2,3-Trimethylbenzene Carbonyls Formaldehyde, Acetaldehyde, Propionaldehyde, Butyraldehyde, Hexanaldehyde, Valeraldehyde, Crotonaldehyde, Acetone, Methyl ethyl ketone, Benzaldehyde PAHs Naphthalene, Acenaphthene, Acenaphthylene, Fluorene, Phenanthrene, Anthracene, Fluoranthene, Pyrene, Chrysene, Coronene, Perylene, Benzo[a]anthracene, Benzo[b]fluoranthene, Benzo[k]fluoranthene, Benzo[e]pyrene, Dibenzo[a,h]anthracene, Benzo[g,h,i]perylene, Benzo[a]pyrene, Indeno[1,2,3-cd]pyrene Metals (PM10) Antimony, Arsenic, Beryllium, Cadmium, Chromium, Cobalt, Lead, Manganese, Nickel, Mercury, Selenium 1.7 Mercury Deposition Network Mercury was of significant health and environmental concern in Utah. Advisories limiting the consumption of fish were issued for certain lakes and watersheds due to their elevated mercury levels in 2008. DAQ was part of the National Mercury Deposition Network, measuring mercury dry deposition from 2009 to summer 2017, and measurements were discontinued after consultation with the EPA. 21 1.8 Meteorological Monitoring Network Meteorological parameters, including ambient temperature, relative humidity, ambient pressure, solar radiation, and wind speed and direction, are currently measured at multiple sites throughout the state. These measurements help characterize the complex wind patterns and micrometeorology within Utah’s airshed and support air quality modeling and the analysis of trends in co-located air pollutants. The DAQ currently uses sonic anemometer systems, such as the RM Young 2D sonic sensors (model 86004), to measure wind parameters. In addition, pyranometers (Campbell Scientific CS301) are used to measure incoming solar radiation. 22 Appendix A- List of equipment used at the DAQ monitoring sites. Parameter Units Mfg Model # Details PM2.5 FRM Micrograms/cubic meter (25 C) Thermo 2025i Low volume sampler (filter) with very sharp cut cyclone (VSCC) - Gravimetric PM2.5 FEM Micrograms/cubic meter (25 C) Thermo 5030i Sharp Beta Attenuation plus nephelometer Micrograms/cubic meter (25 C) Teledyne API T640/T640X Broadband Spectroscopy PM10 FRM Micrograms/cubic meter (25 C) Thermo 2025i Low volume sampler (filter) - Gravimetric PM10 FEM Micrograms/cubic meter (25 C) MetOne E-BAM PLUS Beta Attenuation Mass Monitor PM2.5 Speciation Micrograms/cubic meter (LC) Met One SASS Met One SASS/SuperS ASS Met One SASS/SuperSASS: Teflon/Energy dispersive XRF; Nylon/Ion Chromatography Micrograms/cubic meter (LC) URG 3000N URG 3000N w/Pall Quartz Filter-Organic/Inorganic Carbon Carbon Monoxide Parts per million Teledyne API T300U Gas Filter Correlation Carbon Monoxide (trace level) Parts per million Teledyne API T300 Gas Filter Correlation Nitrogen Dioxide (trace) Parts per billion Teledyne API T200U Gas Phase Chemiluminescence Nitrogen Dioxide (CAPS true) Parts per billion Teledyne API N500 Cavity Attenuated Phase Shift (CAPS) Spectroscopy Reactive Oxides of Nitrogen (NOY) Parts per billion Teledyne API T200U Chemiluminescence with External Thermo converter Sulfur Dioxide Parts per billion Teledyne API T100 Pulsed Fluorescent Sulfur Dioxide (trace) Parts per billion Teledyne API T100U Pulsed Fluorescent Ozone Parts per million Teledyne API T400 Ultraviolet Absorption Ozone Parts per million Teledyne API T265 Gas Phase Chemiluminescence Black Carbon Micrograms/cubic meter (LC) Magee AE33 Aethalometer - Optical Absorption Air Toxics (carbonyls) Parts per billion Carbon ATEC 8000 SILICA-DNPH-CARTRIDGE-KI O3 SCRUB - HPLC Air Toxics (VOCs) Parts per billion Carbon ATEC 2200 6L SUBATM SS CANISTER or SS-CANISTER-PRESSURIZED Air Toxics (PM10 Metals) Nanograms/cubic meter (25 C) TISCH TE-Wilbur10 Tisch Model TE-Wilbur10 Low-Volume Sampler 23 Appendix A- List of equipment used at the DAQ monitoring sites (cont.). Parameter Units Mfg Model # Details Air Toxics (PAHs) Nanograms/cubic meter (25 C) TISCH TE-Wilbur-BL High Volume Sampler (PUF) GC/MS TO-13 Air Toxics (hourly VOCs) Parts per billion Carbon Agilent/Markes CIA T890B Preconcentrator trap/thermal desorber - electronic drier - Markes CIA TD/Agilent GC dual FID - carbon response Hydrogen Chloride (HCL) Parts per billion Picarro G2108 Cavity Ring Down Spectroscopy (CRDS) Formaldehyde (HCHO) Parts per billion Picarro G2307 Cavity Ring Down Spectroscopy (CRDS) Mixing Height Meters Vaisala CL-51 Optical Scattering Ceilometer Mixing Height Meters Vaisala CL-61 Optical Scattering Ceilometer Wind Direction/Speed Meter per second or mile per hour RM Young Ultrasonic Anemometer- 86004 Sonic Anemometer Relative Humidity Percent relative humidity Electronic RH Sensor Solar Radiation Watts per square meter Electronic Sensors UV radiation Watts per square meter Apogee Apogee SU-200-SS Ambient Temperature Degrees Fahrenheit Electronic Temperature Sensor Barometric Pressure Millibars Electronic Sensors 24 Appendix B- Site Information Site: Antelope Island (AI) Longitude: -112.231541 Station Type: SPM AQS#: 49-011-6001 Latitude: 41.039404 MSA: Ogden-Clearfield Address: Antelope Island Elevation (m): 1355 City: N/A County: Davis Site Objective: This site is established to collect meteorological information for air quality modeling inputs. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is on Antelope Island State Park, near the ranger residences, in Davis County. Can data from this site be used to evaluate NAAQS? No Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Elec. Thin Film Continuous 6 meters Urban Ambient Temperature Elec. Resistance Continuous 6 meters Urban Wind Direction Elec. Resistance Level 1 Continuous 6 meters Urban WD Sigma Elec. EPA Method Continuous 6 meters Urban Wind Speed Elec. Chopped Signal Level 1 Continuous 6 meters Urban 25 Site: Badger Island (BI) Longitude: -112.231541 Station Type: SPM AQS#: 49-011-6001 Latitude: 40.94212 MSA: Salt Lake City Address: No street address, on an Island Elevation (m): 1285 City: N/A County: Davis Site Objective: This site is established to collect meteorological information for air quality modeling inputs. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is on Badger Island Can data from this site be used to evaluate NAAQS? No Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Elec. Thin Film Continuous 6 meters Urban Ambient Temperature Elec. Resistance Continuous 6 meters Urban Wind Direction Elec. Resistance Level 1 Continuous 6 meters Urban WD Sigma Elec. EPA Method Continuous 6 meters Urban Wind Speed Elec. Chopped Signal Level 1 Continuous 6 meters Urban 26 Site: Bountiful Viewmont (BV) Longitude: -111.884505 Station Type: SLAMS AQS#: 49-011-0004 Latitude: 40.902945 MSA: Ogden-Clearfield Address: 1370 North 171 West Elevation (m): 1309 City: Bountiful County: Davis Site Objective: The Bountiful Viewmont site is established to determine public exposure to air pollution. The site also monitors emissions from nearby oil refineries and local sand and gravel operations. Previous monitoring and saturation studies have recorded high ozone concentrations. This site is chosen for intensive speciation of PM2.5 under the EPA Chemical Speciation Network (CSN), gaseous volatile organic compounds under the EPA National Air Toxics Trends Network (NTTN) including hexavalent chromium and carbonyl compounds and hourly VOC_PAMS measurements, Nitrogen dioxide, true Nitrogen dioxide and Reactive Oxides of Nitrogen are monitored under the Enhanced Monitoring Plan (EMP) to in support of the ozone monitoring. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located near Viewmont High School at the north end of the city of Bountiful, Davis County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale 27 Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Nitrogen Dioxide (CAPS Cavity Attenuated Phase Shift Continuous Population Exposure SLAMS- Population Neighborhood NOy Gas Phase Chemiluminescence Continuous Ozone modeling input SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM10 Manual Gravimetric Daily (Feb 1-Sep ) Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM10 Metals Manual Gravimetric 1 in 6 days Population Exposure SLAMS- Population Neighborhood PM10 Metals Co-located Manual Gravimetric 6 samples/year Population Exposure SLAMS- Population Neighborhood PM2.5 Speciation Manual EPA CSN 1 in 6 days Population Exposure SLAMS- Population Neighborhood VOC Manual EPA NATTS 1 in 6 days Population Exposure SLAMS- Population Neighborhood Air Toxics (hourly VOCs- PAMS) Instrumental Gas Chromatography Continuous Ozone modeling input Population Neighborhood Semi-volatile Manual EPA NATTS 1 in 6 days Population Exposure SLAMS- Population Neighborhood Carbonyl compounds Manual EPA NATTS 1 in 6 days Population Exposure SLAMS- Population Neighborhood Formaldehyde and Hydrogen Chloride Cavity Ring Down Spectroscopy (CRDS) Continuous Ozone modeling input Population Neighborhood Black Carbon Aethalometer (light absorption) Continuous Population Exposure SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban Precipitation Tipping Bucket Rain Gauge Continuous Urban Mixing Height Optical Scattering Ceilometer Continuous Urban 28 Site: Brigham City# 3 (BG) Longitude: -112.021484 Station Type: SLAMS AQS#: 49-003-0005 Latitude: 41.485039 MSA: Ogden-Clearfield Address: 350 West 1175 South Elevation 1316 City: Brigham City County: Box Elder Site Objective: Site established to contain to assess population exposure and to help the forecasters with ozone and PM2.5 predictions. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located in near a neighborhood area of Brigham City in Box Elder County Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood PM10 Manual Gravimetric Daily (Feb 1- Sep 30) Population Exposure SLAMS- Population Neighborhood 29 PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 30 Site: Copperview (CV) Longitude: -111.894162 Station Type: SLAMS AQS#: 49-035-2005 Latitude: 40.597911 MSA: Salt Lake City Address: 8449 South Monroe St. Elevation (m): 1343 City: Midvale County: Salt Lake Site Objective: Site established to assess population exposure in southeast Salt Lake County and to help the forecasters with ozone and PM2.5 predictions. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located in a neighborhood area of Midvale in Salt Lake County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood Carbon Monoxide, Trace Gas Phase Correlation Continuous Population Exposure SLAMS- Population Neighborhood Sulfur Dioxide, Trace Pulsed Fluorescence Continuous Population Exposure SLAMS- Population Neighborhood 31 PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 32 Site: Enoch (EN) Longitude: -113.055482 Station Type: SLAMS AQS#: 49-021-0005 Latitude: 37.747409 MSA: Not in MSA Address: 3840 North 325 East Elevation (m): 1693 City: Enoch County: Iron Site Objective: Site established to contain to assess population exposure and to help the forecasters with ozone and PM2.5 predictions. Does the site meet the objective? Yes, all objectives are met. Site Description: This site is located in a county area near Enoch. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood 33 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 34 Site: Environmental Quality (EQ) Longitude: -111.94585 Station Type: SLAMS AQS#: 49-035-3015 Latitude: 40.777028 MSA: Salt Lake City Address: 1950 West 240 North Elevation (m): 1284 City: Salt Lake City County: Salt Lake Site Objective: The Air Monitoring Center site is established to replace the Rose Park station as an area of further investigation of PM2.5 in Salt Lake County. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at the roof of the Technical Support Center in the city of Salt Lake, Salt Lake County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Ammonia Manual NADP AMoN Integrated 14 days Population Exposure SPM-Transport Regional Trace Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- High Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- High Neighborhood 35 Carbon Monoxide Gas Phase Correlation Continuous Population Exposure SLAMS- High Neighborhood Sulfur Dioxide, Trace Pulsed Fluorescence Continuous Population Exposure SLAMS- High Neighborhood AirToxics (hourly VOCs- PAMS) Instrumental Gas Chromatography Continuous Ozone modeling input Population Neighborhood Formaldehyde Cavity Ring Down Spectroscopy (CRDS) Continuous Ozone modeling input Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- High Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM10 Manual Gravimetric Daily Population Exposure SLAMS-Population Neighborhood PM10 Beta Attenuation Mass Monitor Continuous Air Quality Index SLAMS-Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 15 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 15 meters Urban Wind Direction 2D-ultrasonic-anemometer transducers Continuous 15 meters Urban Wind Speed 2D-ultrasonic-anemometer transducers Continuous 15 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 15 meters Urban WD Sigma Electronic EPA Method Continuous 15 meters Urban Solar Radiation Solar Radiation sensor Continuous 15 meters Urban Mixing Height Optical Scattering Ceilometer Continuous Urban 36 Site: Erda (ED) Longitude: -112.355782 Station Type: SLAMS AQS#: 49-045-0004 Latitude: 40.600565 MSA: Salt Lake City Address: 2163 West Erda Way Elevation (m): 1321 City Erda County: Tooele Site Objective: This site is established to determine population exposure to air pollutants. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located in the city of Erda, Tooele County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Operating Monitoring Spatial Analysis Method Schedule Objective Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Nitrogen Dioxide (CAPS true) Cavity Attenuated Phase Shift (CAPS) Continuous Population Exposure SLAMS- Population Neighborhood NOy Gas Phase Chemiluminescence Continuous Ozone modeling input SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood 37 Air Toxics (hourly VOCs- PAMS) Instrumental Gas Chromatography Continuous Ozone modeling input Population Neighborhood Formaldehyde & Hydrogen Chloride Cavity Ring Down Spectroscopy (CRDS) Continuous Ozone modeling input Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 3 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 38 Site: Harrisville (HV) Longitude: -111.986476 Station Type: SLAMS AQS#: 49-057-1003 Latitude: 41.302685 MSA: Ogden-Clearfield Address: 425 West 2550 North Elevation (m): 1320 City: Harrisville County: Weber Site Objective: This site is established in response to an ozone saturation study indicating this as a potentially high ozone concentration area. It is monitoring particulate matter Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located on the grounds of Majestic Elementary School in the city of Harrisville, Weber County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood Carbon Monoxide Gas Phase Correlation Continuous Population Exposure SLAMS-High Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood 39 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM10 Real Time Beta Attenuation Mass Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 40 Site: Hawthorne (HW) Longitude: -111.872221 Station Type: SLAMS AQS#: 49-035-3006 Latitude: 40.734367 MSA: Salt Lake City Address: 1675 South 600 East Elevation (m): 1308 City: Salt Lake City County: Salt Lake Site Objective: This site is established to represent population exposure in the Salt Lake City area. This site is also designated as the EPA NCORE site for Utah. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at Hawthorne Elementary School in the southeast section of Salt Lake City, Salt Lake County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Nitrogen Dioxide (CAPS true) Cavity Attenuated Phase Shift (CAPS) Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood Carbon Monoxide Trace Level Gas Phase Correlation Continuous Population Exposure SLAMS-High Neighborhood NOy Trace Level Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood 41 SO2 Trace Level Pulsed Fluorescence Continuous Population Exposure SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM2.5 Speciation Manual EPA CSN 1 in 3 days Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM10 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM10 Real Time Beta Attenuation Mass Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PMcoarse Manual Gravimetric Subtraction Daily Population Exposure SLAMS- Population Neighborhood Air Toxics (hourly VOCs- PAMS) Instrumental Gas Chromatography Continuous Ozone modeling input Population Neighborhood Formaldehyde Cavity Ring Down Spectroscopy (CRDS) Continuous Ozone modeling input Population Neighborhood Meteorological Parameters Parameter Sampling & Operating Tower Spatial Analysis Method Schedule Height Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 3 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Relative Humidity Air Temperature and Relative Humidity Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 4 meters Urban UV Radiation UV Radiation sensor Continuous 4 meters Urban Mixing Height Optical Scattering Ceilometer Continuous Urban Precipitation Tipping Bucket Rain Gauge Continuous Urban 42 Site: Heber (HB) Longitude: -112.0363 Station Type: SLAMS AQS#: 49-051-0001 Latitude: 40.4979 MSA: Heber Address: Heber City Site #1 Water Conservation District lot, 626 E 1200 S Heber City Elevation (m): 1524 City: Heber County: Heber Site Objective: This site is established to represent population exposure in Heber county. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at Public Power Utility Facility, in a residential area and near a small canal Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood 43 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 44 Site: Herriman #3 (H3) Longitude: -112.036329 Station Type: SLAMS AQS#: 49-035-3012 Latitude: 40.496412 MSA: Salt Lake City Address: 14058 Mirabella Drive Elevation (m): 1534 City: Herriman County: Salt Lake Site Objective: This site is established to represent population exposure in southwest the Salt Lake County. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at Fort Herriman Middle School in southwest Salt Lake County Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood 45 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Co-located Continuous Precision and Accuracy SLAMS- Population Neighborhood PM10 Real Time Beta Attenuation Mass Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 46 Site: Hurricane (HC) Longitude: -113.305105 Station Type: SLAMS AQS#: 49-053-0007 Latitude: 37.179138 MSA: St George Address: 147 North 870 West Elevation (m): 992 City: Hurricane County: Washington Site Objective: This site is established to determine population exposure to ozone in Washington County Does the site meet the objective? Yes, all objectives are met. Site Description: This site is located behind the Hurricane City offices Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood 47 Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 2 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 48 Site: Lindon (LN) Longitude: -111.713486 Station Type: SLAMS AQS#: 49-049-4001 Latitude: 40.339505 MSA: Provo - Orem Address: 50 North Main Elevation (m): 1444 City: Lindon County: Utah Site Objective: This site is established to determine PM emissions from commercial and industrial sources. Historically, this site has reported the highest PM values in Utah County Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at the Lindon Elementary School in the City of Lindon, Utah County Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood 49 Carbon Monoxide Gas Phase Correlation Continuous Population Exposure SLAMS-High Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population PM2.5 Manual Gravimetric Co-located 1 in 6 days Precision and Accuracy Assessment SLAMS- Population PM2.5 Speciation Manual EPA CSN 1 in 6 days Population Exposure SLAMS- Population PM10 Real Time Beta Attenuation Mass Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Black Carbon Aethalometer (light absorption) Continuous Population Exposure SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 50 Site: Lake Park (LP) Longitude: -112.008684 Station Type: SLAMS AQS#: 49-035-3014 Latitude: 40.709905 MSA: Salt Lake City Address: 2782 South Corporate Park Dr. Elevation (m): 1295 City: West Valley City County: Salt Lake Site Objective: This site recently established to determine the potential impact of the Inland Port on the Salt Lake Valley Airshed. Does the site meet the objective? Yes, all objectives are met. Site Description: This site is located near the parking lot of Monticello Academy in West Valley City, Salt Lake County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Black Carbon Aethalometer (light absorption) Continuous Population Exposure SLAMS- Population Neighborhood 51 Air Toxics (hourly VOCs- PAMS) Instrumental Gas Chromatography Continuous Ozone modeling input SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 52 Site: Moab (M7) Longitude: -109.537167 Station Type: SPM AQS#: 49-019-0007 Latitude: 38.566055 MSA: NA Address: 691 S Mill Creek Dr. Elevation (m): 1259 City Moab County: Grand Site Objective: Site established to assess population exposure and support air quality forecasting Does the site meet the objective? Yes, all objectives are met. Site Description: in Moab, Grand County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SPM Ozone Ultraviolet Continuous Population Exposure SPM PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SPM 53 Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Regional Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Regional Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Regional Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Regional Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Regional WD Sigma Electronic EPA Method Continuous 10 meters Regional Solar Radiation Solar Radiation sensor Continuous 10 meters Regional 54 Site: Near Road (NR) Longitude: -111.901874 Station Type: SLAMS AQS#: 49-035-4002 Latitude: 40.662868 MSA: Salt Lake City Address: 5001 South Galleria Dr. Elevation (m): 1305 City: Murray County: Salt Lake Site Objective: This site recently established to assess population exposure to and to monitor vehicular contribution to air pollution as part of the EPA NO2 monitoring Does the site meet the objective? Yes, all objectives are met. Site Description: A site was found for the Near Road monitor on I-15 at the address 4951 South Galleria Dr, Murray. The site is located at 14 meters from the inlet probe to the center of the nearest lane (the nearest lane is an exit lane) or It is 19 meters to center of the nearest lane that supports normal traffic flow. Can data from this site be used to evaluate NAAQS? NO* Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- Population Neighborhood Carbon Monoxide Gas Phase Correlation Continuous Population Exposure SLAMS-High Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood 55 PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 3 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 3 meters Urban Wind Direction 2D-ultrasonic anemometer Continuous 3 meters Urban Wind Speed 2D-ultrasonic anemometer Continuous 3 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 3 meters Urban Solar Radiation Solar Radiation sensor Continuous 3 meters Urban * State and Local Air Monitoring Stations (SLAMS) are strategically placed to represent general air quality across urban, suburban, and rural areas. These sites follow specific siting criteria designed to avoid direct influence from nearby pollution sources like industrial areas or highways. The goal is to reflect typical population exposure and provide broad spatial coverage. In contrast, near-road monitoring sites are located within 50 meters of major roadways, specifically to capture the impact of traffic emissions. These sites are placed in areas with heaviest vehicle activity and are more likely to record higher levels of pollutants such as NO2 and PM2.5. Due to their proximity to major traffic, near-road sites are more likely to exceed the NAAQS compared to more widely distributed SLAMS stations. A few key points to consider: • Near-road sites are designed to assess the impact of traffic emissions, which can elevate pollutants like PM2.5. Including these sites in the broader NAAQS calculation could distort the results, as they represent areas with high vehicle emissions that may not be indicative of the general population’s exposure to PM2.5. • The primary aim of the PM2.5 NAAQS is to protect public health across a broader region. Near-road monitoring, on the other hand, focuses on localized hotspots with high traffic volumes. These hotspots may have elevated PM2.5 concentrations that exceed the NAAQS, but they don’t reflect the typical exposure experienced by the general population, which is usually lower, especially in areas farther from traffic. • Near Road Site is a microscale monitor and using this to determine compliance with NAAQS would be inaccurate as the air quality at these specific locations may not be representative of the larger areas. • The Near Road Site is a microscale monitor, and using it to determine compliance with the NAAQS may be inaccurate, as the air quality at such specific location may not be representative of the broader surrounding area. Because near-road sites do not fully represent the exposure of the majority of the population, excluding their data from NAAQS calculations helps provide a more accurate picture of air quality and exposure levels that affect the general public. 56 . Site: Price #2 (P2) Longitude: -110.770097 Station Type: SPM AQS#: 49-007-1003 Latitude: 39.595749 MSA: Price Address: 351 South 2500 East Elevation (m): 1737 City: Price County: Carbon Site Objective: This site is established in response to a three-state ozone study. It is funded by the Bureau of Land Management Does the site meet the objective? Yes, all objectives are met. Site Description: This site is located in a farm field 3.6 Km east of Price Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS-High Neighborhood 57 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SPM Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Regional Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Regional Wind Direction 2D-ultrasonic anemometer Continuous 10 meters Regional Wind Speed 2D-ultrasonic anemometer Continuous 10 meters Regional Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Regional WD Sigma Electronic EPA Method Continuous 10 meters Regional Solar Radiation Solar Radiation sensor Continuous 10 meters Regional 58 Site: Red Butte (RB) Longitude: -111.8285 Station Type: SPM AQS#: 49-035-3018 Latitude: 40.7667 MSA: Salt Lake City Address: 2195 Red Butte canyon Rd Elevation (m): 1517 City: Salt Lake City County: Salt Lake Site Objective: This site is established to support air quality models and research studies Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at the University of Utah Research Met in the southeast section of Salt Lake City, Salt Lake County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide (CAPS true) Cavity Attenuated Phase Shift (CAPS) Continuous Population Exposure SPM Ozone Ultraviolet Continuous Population Exposure SPM NOy Trace Level Gas Phase Chemiluminescence Continuous Population Exposure SPM PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SPM 59 Air Toxics (hourly VOCs- PAMS) Instrumental Gas Chromatography Continuous Ozone modeling input SPM Formaldehyde Cavity Ring Down Spectroscopy (CRDS) Continuous Ozone modeling input SPM Meteorological Parameters Parameter Sampling & Operating Tower Spatial Analysis Method Schedule Height Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 2 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Relative Humidity Air Temperature and Relative Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban Mixing Height Optical Scattering Ceilometer Continuous Urban UV Radiation UV Radiation sensor Continuous 4 meters Urban Precipitation Tipping Bucket Rain Gauge Continuous Urban 60 Site: Roosevelt (RS) Longitude: -110.008961 Station Type: SLAMS AQS#: 49-013-0002 Latitude: 40.294175 MSA: NA Address: 290 South 1000 West Elevation (m): 1585 City: Roosevelt County: Duchesne Site Objective: This site is established to determine maximum ozone and PM2.5 concentrations in Duchesne County Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located in the city park North West section of Roosevelt. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- Population Neighborhood Ozone Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood 61 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Co-located Continuous Precision and Accuracy SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population PM10 Manual Gravimetric Daily Population Exposure SLAMS-Impact Neighborhood PM10 Manual Gravimetric Co-located 1 in 6 days Precision and Accuracy Assessment SLAMS- Population PM10 Real Time Beta Attenuation Mass Monitor Continuous Air Quality Index SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban Ambient Temperature Elec. Resistance Continuous 2 meters Urban Temperature Difference Math Channel Continuous 2 meters Urban Mixing Height Optical Scattering Ceilometer Continuous Urban 62 Site: Rose Park (RP) Longitude: -111.930996 Station Type: SLAMS AQS#: 49-035-3010 Latitude: 40.795514 MSA: Salt Lake City Address: 1250 North 1400 West Elevation (m): 1283 City: Salt Lake City County: Salt Lake Site Objective: This site is established to better represent PM2.5 exposure in this area of Salt Lake City Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located in the community of Rose Park at the north end of Salt Lake City, Salt Lake County Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- Population Neighborhood Carbon Monoxide Gas Phase Correlation Continuous Population Exposure SLAMS- Population Neighborhood Sulfur Dioxide Pulsed Fluorescence Continuous Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population 63 PM2.5 Manual Gravimetric Co-located Daily Precision and Accuracy Assessment SLAMS- Population Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 64 Site: Smithfield (SM) Longitude: -111.852064 Station Type: SLAMS AQS#: 49-005-0007 Latitude: 41.84267 MSA: Logan Address: 675 West 220 North Elevation (m): 1379 City: Smithfield County: Cache Site Objective: Site established to replace Logan site and determine general population exposure. Does the site meet the objective? Yes, all objectives are met. Site Description: This site is located at Birch Creek Elementary School in Cache County. It is approximately 7 miles north of Logan Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- Population Neighborhood PM2.5 Speciation Manual EPA CSN 1 in 6 days Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Precision and Accuracy SLAMS- Population Neighborhood 65 PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Co-located Continuous Precision and Accuracy SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Co-located Daily Precision and Accuracy Assessment SLAMS- Population Neighborhood Black Carbon Aethalometer (light absorption) Continuous Population Exposure SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban Mixing Height Optical Scattering Ceilometer Continuous Urban 66 Site: Spanish Fork (SF) Longitude: -111.658011 Station Type: SLAMS AQS#: 49-049-5010 Latitude: 40.136369 MSA: Provo - Orem Address: 300 West 2050 North Elevation (m): 1380 City: Spanish Fork County: Utah Site Objective: This site is established to determine the boundary of the high ozone and PM2.5 concentrations in Utah County. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at the Spanish Fork airport in the city of Spanish Fork, Utah County. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Operating Monitoring Spatial Analysis Method Schedule Objective Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SLAMS- Population Neighborhood Ozone Ultraviolet Continuous Population Exposure SLAMS- Population Neighborhood PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS- Population Neighborhood PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood 67 Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban 68 Site: Vernal (V4) Longitude: -109.560731 Station Type: SLAMS AQS#: 49-047-1004 Latitude: 40.464812 MSA: NA Address: 628 North 1700 West Elevation (m): 1667 City: Vernal County: Uintah Site Objective: This site is established was set up in response to an ozone study. Does the site meet the objective? Yes, all objectives are met. Site Description: The site is located at the northwest of the city of Vernal. Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure Regional Ozone Ultraviolet Continuous Population Exposure Regional Ozone Gas Phase Chemiluminescence Continuous Population Exposure Regional PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SLAMS-Population 69 PM2.5 Manual Gravimetric Daily Population Exposure SLAMS- Population Neighborhood Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Regional Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Regional Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Regional Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Regional Ambient Pressure Barometric Pressure Transducer Continuous 2 meters Regional WD Sigma Electronic EPA Method Continuous 10 meters Regional Solar Radiation Solar Radiation sensor Continuous 10 meters Regional 70 Site: Prison (ZZ) Longitude: -112.087772 Station Type: SPM AQS#: 49-035-3016 Latitude: 40.80793 MSA: Salt Lake City Address: 8000 W 1480 N Elevation (m): 1287 City: Salt Lake City County: Salt Lake Site Objective: This site recently established to determine the potential impact of the Inland Port on the Salt Lake Valley Airshed. Does the site meet the objective? Yes, all objectives are met. Site Description: This site is located at the new State Prison north of I-80 on the southern border of the Great Salt Lake in Salt Lake County Can data from this site be used to evaluate NAAQS? Yes Gaseous/Particulate Parameters Parameter Sampling & Analysis Method Operating Schedule Monitoring Objective Spatial Scale Nitrogen Dioxide Gas Phase Chemiluminescence Continuous Population Exposure SPM Ozone Ultraviolet Continuous Population Exposure SPM PM2.5 Real Time Synchronized Hybrid Ambient Real Time Particulate Monitor Continuous Air Quality Index SPM 71 PM10 Manual Gravimetric Daily (Feb 1-Sep 30) Population Exposure SPM Black Carbon Aethalometer (light absorption) Continuous Population Exposure SPM Formaldehyde and Hydrogen Chloride Cavity Ring Down Spectroscopy (CRDS) Continuous Ozone modeling input SPM Meteorological Parameters Parameter Sampling & Analysis Method Operating Schedule Tower Height Spatial Scale Relative Humidity Air Temperature and Relative Humidity Sensor- Electronic Thin Film Continuous 10 meters Urban Ambient Temperature Air Temperature and Relative Humidity Sensor- Electronic Resistance Continuous 10 meters Urban Wind Direction 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Wind Speed 2D-ultrasonic anemometer transducers Continuous 10 meters Urban Ambient Pressure Barometric Pressure Transducer Continuous 10 meters Urban WD Sigma Electronic EPA Method Continuous 10 meters Urban Solar Radiation Solar Radiation sensor Continuous 10 meters Urban Mixing Height Optical Scattering Ceilometer Continuous Urban 72 Response to Public Comments