2014 Ambient Air Monitoring Five Year Network Assessment & Plan Pima County Department of Environmental Quality 30 North Stone, Suite 700 Tucson, Arizona 85701 AQ 388 2014 Ambient Air Monitoring Five Year Network Assessment & Plan Pima County Board of Supervisors Ally Miller Ramón Valadez Sharon Bronson Raymond Carroll Richard Elías Pima County Administrator Charles H. Huckelberry Pima County Department of Environmental Quality Ursula Kramer Director Richard Grimaldi Deputy Director Air Quality Technical Operations Ted Gould Program Manager Data Collection Group Data Management Group Jim McDonnell, Principal Instrument Technician Tom Coffin, Supervisor Mark Rogers, Senior Instrumentation & Control Specialist Deborah Jentoft, Air Quality Analyst Andy Poe, Senior Instrumentation & Control Specialist Quality Assurance Group Mike Draper, Program Coordinator TABLE OF CONTENTS I. INTRODUCTION…………………………………………………………………….. Network improvements and anticipated modifications...………………….. II. BACKGROUND……………………………………………………………………… Regional Evaluation……………………………………………………….. Average Daily Traffic (ADT)……………………………………………… Local Geography and Meteorology……………………………………….. Definition of Monitoring objective, site types and spatial scales………….. Eastern Pima County, Tucson air planning area map……………………… Population Distribution within the TAPA………………………………….. III. MONITORING SITES SUMMARY AND MAP……………………………………. Active particulate monitoring sites for 2014……………………………… Active gaseous monitoring sites for 2014………………………………..... PDEQ Ambient Air Monitoring site location map………………………… Monitoring network descriptive summary tables 2014….…………………. IV. CURRENT MONITORING NETWORK EVALUATIONS…………………………. PM10 Monitoring Network Requirements………………………………... PM 2.5 Monitoring Network Requirements………………………………… PM 10 -PM 2.5 Monitoring Network Requirements…………………………… O 3 Monitoring Network Requirements……………………………………. CO Monitoring Network Requirements…………………………………. NO 2 Monitoring Network Requirements………………………………….. NO y Monitoring Network Requirements………………………………….. SO 2 Monitoring Network Requirements………………………………….. Lead Monitoring Network Requirements ………………………………… V. DETAILED SITE AND MONITOR INFORMATION……………………………… VI. TECHNOLOGY ……………………………………………………………………… LIST OF FIGURES / TABLES FIGURES 1. Eastern Pima County, Tucson Air Planning Area map……………………… 2. Population Distribution within the TAPA ……………………………...……. 3. PDEQ Ambient Air monitoring site location map….……………………….. 4. Population Distribution Represented by PM 10 Monitors…………………….. 5. Population Distribution Represented by PM 25 Monitors…………………….. 6. Population Distribution Represented by Ozone Monitors…………………… 7. Population Distribution Represented by Carbon Monoxide Monitors………. 8. Population Distribution Represented by Nitrogen Dioxide Monitors………. TABLES 1. Relationship between Monitoring site type and spatial scale represented……………………………………………………………….…….. 2. Active particulate monitoring sites for 2014…………………………………… 3. Active gaseous monitoring sites for 2014……………………………………. . 4. Monitoring Network Descriptive Summary Tables……………………………. 5. 2014 PM 10 Design Criteria…………………………………………………….. 6. PM 10 Precision and Accuracy Summary Table………………………………..... 7. Collocated PM 10 Monitors …………………………………………………...... 8. PM 10 Annual Summary Statistics ………………………………………………. 9. 2014 PM 2.5 Design Criteria……………………………………………………… 10. Collocated PM 2.5 Monitors …………………………………………………….. 11. PM 2.5 Precision and Accuracy Summary Table…………………………………. 12. PM 2.5 Annual Summary Statistics………………………………………………. 13. PM 10 - PM 2.5 Annual Summary Statistics………………………………………. 14. 2014 Ozone Design Criteria……………………………………………………. 15. Ozone Audit Dates 2014………………………………………………………. 16. Ozone Annual Summary Statistics ……………………………………………. 17. 2014 Carbon Monoxide Design Criteria ……………………………………….. 18. CO Audit Dates 2014……….………………………………………………....... 19. CO Annual Summary Statistics………………………………………………… 20. 2014 Nitrogen Dioxide Design Criteria ………………………………………. 21. Nitrogen Dioxide Audit Dates 2014 …………………………………………… 22. NO 2 Annual Summary Statistics ……………………………………………….. 23. NO y Audit Dates 2014 …………………………………………………………. 24. NO y Annual Summary Statistics………………………………………………… 25. 2014 Sulfur Dioxide Design Criteria …………………………………………… 26. Sulfur Dioxide Audit Dates 2014 ………………………………………………. 27. SO 2 Annual Summary Statistics ………………………………………………… 28. 2014 Lead Design Criteria ………………………………………………………. 29. Lead Precision and Accuracy Summary Table …………………………………. 30. Lead Annual Summary Statistics ……………………………………………….. 2 3 4 4 4 4 6 8 9 10 10 11 12 13 17 17 23 28 29 33 37 41 42 44 46 104 8 9 12 22 27 32 36 40 7 10 11 13 17 19 19 20 23 23 25 25 28 29 30 30 33 34 34 37 38 38 41 41 42 42 43 44 45 45 2014 Ambient Air Monitoring Five Year Network Assessment and Plan I. INTRODUCTION This document constitutes the 2014 Ambient Air Monitoring 5 Year Network Assessment and Plan for the Pima County air monitoring network. The Pima County Department of Environmental Quality (PDEQ) has prepared this document to be submitted to the U.S. Environmental Protection Agency (USEPA), Region IX. The purpose of the Ambient Air Monitoring 5Year Network Assessment and Plan is to determine if the network is achieving the air monitoring objectives specified in 40 CFR Part 58 Appendix D, which mandate adherence to certain number, type and location requirements of monitoring sites and specific site criteria such as monitoring inlet height. The review should also determine if modifications should be made to the network (e.g. through the termination or relocation of unnecessary stations or addition of new stations). In addition, the review is necessary in order to ensure that the residents of Pima County are provided adequate, representative and useful air quality data, and to provide adequate protection to public health. The designated ambient air pollutants monitored and reported by PDEQ are carbon monoxide (CO), ozone (O 3 ), nitrogen dioxide (NO 2 ), sulfur dioxide (SO 2 ), lead (pb) and particulate matter with an aerodynamic diameter of 10 micrometers or less in size (PM 10 ) and particulate matter with aerodynamic diameter of 2.5 micrometers or less in size (PM 2.5 ). This pollutant data is submitted to the EPA Air Quality System (AQS) database for determination of compliance with National Ambient Air Quality Standards (NAAQS). This report contains statistical data summaries for the 2014 calendar year and provides a site by site assessment of the monitoring network with respect to EPA site criteria. The Pima County monitoring network includes both State or Local Air Monitoring Stations (SLAMS) and Special Purpose monitors (SP). SLAMS monitors comprise the required network monitors that are used for NAAQS comparisons and follow the monitoring objectives listed on page 6. SP monitors are used to conduct special purpose studies and to enhance the network coverage of air quality monitoring data. Pima County has a designated NCore site at the Children’s Park location, which also monitors for reactive oxides of nitrogen (NO Y ), particulate matter, coarse fraction (PM 10-2.5 ), speciated PM 2.5 particulate matter and lead. Pima County does not share monitoring responsibilities with Arizona Department of Environmental Quality at this time. Schedule of EPA’s review of criteria pollutants: December, 2014 – EPA chooses to retain current Lead standard November, 2014 – EPA proposes strengthening Ozone standard April, 2014 – EPA proposes options to asses Sulfur Dioxide 2 2014 Ambient Air Monitoring Five Year Network Assessment and Plan PDEQ made the following network modifications in 2014: Installed a Met One Super SASS sequential speciation sampler and an upgraded URG carbon sampler at the Children’s Park NCore station, to more easily operate the samplers on a 1in 3 day schedule Closed the Prince Road PM 10 microscale monitoring station for logistical reasons, namely due to an extended period without electricity to operate the sampler, and exceedingly unsanitary conditions caused by a pigeon infestation. A letter requesting approval of this closure has been sent to EPA, too late for inclusion in this report, and we are awaiting EPA’s response. PDEQ’s anticipated network modifications in 2015: Continue impact analysis of development near the Tangerine ozone and PM 10 monitoring station, and if necessary change the station spatial scale and site type to correspond with changes to area development. Begin preliminary site analysis and selection for the NO 2 near roadway monitoring station. Install R & P 2000 at Santa Clara to meet designation collocate requirements. Based on the findings from the Technical System Audit in 2014, Pima County will be requesting the classification change of Special Purpose monitors to SLAMS for the monitors listed below. Carbon Monoxide: Children’s Park NCore, Cherry & Glenn and Golf Links & Kolb Nitrogen Dioxide: Children’s Park NCore Ozone: Green Valley, Tangerine, Rose Elementary, Coachline and Fairgrounds PM 10 : Geronimo, Santa Clara, Green Valley and Tangerine Based on the findings from the Technical System Audit in 2014, Pima County will be requesting the classification change of Special Purpose monitors to OTHER for the monitors listed below. PM 2.5 : Geronimo, GreenValley, Rose Elementary, Coachline General comment regarding monitoring station siting criteria: The locations of monitoring stations in the PDEQ network require considerable planning to conform to all of the siting requirements specified in 40 CFR 58 Appendix E. Locations are chosen only after carefully considering the intent and installation logistics of each station. Some stations remain static, and easily maintain all siting criteria, and others fall victim to urban evolution and nature. Development happens and trees grow, modifying the original circumstances. Development can change those circumstances to the point that relocation or designation change of a station is required. Tree growth is more forgivable in that it can be modified by removal or trimming, but sometimes this is not possible for a number of reasons. Going to the effort of relocating a station because of tree growth is not generally practical. Modifying the station information to categorize trees as an obstruction is preferable, as long as siting criteria still meets the minimum requirements for obstructions. Most of the trees near PDEQ monitoring stations are typical of Sonoran Desert indigenous species, namely mesquite and palo verde, both of which have small, relatively sparse leaves, and in most cases do not totally block airflow, or provide large surfaces for particulate 3 2014 Ambient Air Monitoring Five Year Network Assessment and Plan deposition. However, PDEQ has several stations that have been compromised by substantial tree growth, and in each section for those stations, the category for degrees of unrestricted airflow will reflect the reality of tree growth at those stations, and the obstructed airflow will be identified by direction in degrees. II. BACKGROUND Pima County Air Quality Control District met all the National Ambient Air Quality Standards (NAAQS) in 2014. Concentrations of the criteria pollutants have been stable over the past few years with ozone and particulate matter (PM 10 ) being the major concern for Pima County. Ozone has been very close to the standard, often within 95% of the standard. Particulate Matter (PM 10 ) levels are elevated during drought conditions and high winds which have caused exceedances of the NAAQS. There was one day that Pima County DEQ monitors exceeded the PM 10 standard in 2014. Regional Evaluation In order to evaluate existing and proposed monitoring stations and their stated objectives, regional information is used. The regional information consists of the most current values for population, major urban developments and directions of growth, traffic and highway data, major industries and aerial photographs showing topography. Population (census tract) data can act as a guide in evaluation of the representativeness of a site for determining population exposure. The 2010 census shows Pima County population at 980,263 and the city of Tucson population at 520,116. Figure 1 on page 8 illustrates the Eastern Pima County Tucson Air Planning Area. The various incorporated areas and other agency lands are shown, as well as the named mountain peaks that define the planning area for Eastern Pima County, which includes the Tucson Metropolitan area. The Pima County MSA has incurred a population increase of approximately 2.5% since the 2010 census, based on 2014 estimates by the US Census Bureau. Figure 2 on page 10 depicts the areas of population increase between 2010 and 2015, as well as the two previous consecutive ten year periods. Average Daily Traffic (ADT) Traffic data is necessary for site evaluations since a large portion of air pollutants in the Tucson basin are caused by vehicular traffic. Traffic volumes and density maps are used in evaluating the monitoring network. This data is routinely compiled and used by local transportation and planning agencies. An analysis of the most current traffic data indicates that the network continues to meet the requirements for the monitoring site type and corresponding spatial scales as initially established. The Average Daily Traffic (ADT) numbers are 24 - hour, two - way volume of averaged weekday traffic. Latitude and Longitude Latitude and Longitude data is also provided for the monitoring sites using Datum WGS84 AZ Central in Decimal.Degrees. Local Geography and Meteorology Tucson, Arizona is a major metropolitan area situated in the Santa Cruz river valley, which is encompassed by the Sonoran Desert at an elevation between 2300 and 2800 feet. Basin and range topography characterizes the region with rugged mountain ranges encircling the valley floor with mountain peak elevations in excess of 9000 feet, thus delineating the Tucson Air Planning Area. The 4 2014 Ambient Air Monitoring Five Year Network Assessment and Plan flat or gently rolling valley terrain slopes from the higher south and southeast toward the lower northwest following the Santa Cruz river drainage. The climate of Tucson is characterized by a hot season normally starting in April and ending in October, and a generally mild winter. Maximum daily temperatures from May through September are usually above 90 degrees Fahrenheit. The average rainfall is around eleven inches per year. Tucson International Airport records show an average of 240 clear days a year (days with less than 50% total cloud cover). The remaining periods include the winter prefrontal situations more common in the north and the prolonged seasons of convective summer storms. Wind velocity and direction changes, associated with the large scale pressure systems, frequently result in localized dust storms. The mountain-valley circulation, along with surface heating during the day and radiational cooling at night, create a predominantly southeast to northwest wind path in the basin. Airflows generally tend to be downvalley (from the southeast) at night and early morning hours, reversing to the upvalley direction (from the northwest) during the day. These downvalley / upvalley flows are strongly influenced by localized upslope / downslope terrain. The normal upvalley airflow is from the northwest, and parallels the Santa Cruz River, but decays well before sunset. This is followed by an hour of light, erratic flows which turn into the downvalley flow from the southeast, and reach their maximum and stabilized speed in four to six hours. The air temperature drops steadily during this interval until the sun rises. The downvalley direction continues for two to five hours past sunrise and then transforms into a short calm period prior to the change to upvalley flows. The southeasterly “monsoon” regime that occurs primarily in the months of July and August is a large scale synoptic feature with considerable yearly variation both in intensity and timing. At the Tucson International Airport, the winds become strong, gusty and southeasterly with high relative humidity, cloud cover and frequent thunderstorms. The mountain – valley circulation tends to be suppressed during this time period. Atmospheric temperature inversions occur almost daily in the Tucson air basin. During the winter months these inversions may become severe with particulate and other pollutants becoming concentrated, remaining near the ground level causing haze. When the sun sets, the ground and surface air cools faster than the air several hundred feet above the surface. Since air temperature normally decreases with increasing altitude, the warm and cool layers are reversed or “inverted”, hence the name ‘temperature inversion’. These temperature inversions are usually strongest on cold, clear winter nights, where there is an absence of cloud cover. Consequently, the inversions “lock” the pollutants near the surface. As the sun causes the cool air layer close to the ground to warm up, vertical mixing and horizontal transport disperse the air pollutants. In the early evening, the low level air inversion begins to form again and often coincides with the evening traffic rush hour. 5 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Definition of Monitoring Objectives, Site Types and Spatial Scales The Pima County ambient air monitoring network is designed to meet three basic monitoring objectives. These objectives listed in Appendix D, 1.1 of 40 CFR 58 are: ♦ To provide air pollution data to the general public in a timely matter; ♦ To comply with ambient air quality protocols and standards in order for data to be used for comparison to the NAAQS; ♦ To support research studies. The monitoring stations which comprise the Pima County network are designed to meet at least one of six basic monitoring site types. As listed in Appendix D, 1.1.1 of 40 CFR 58, the site types: ♦ ♦ ♦ ♦ ♦ ♦ Determine the area of highest concentrations expected to occur in the network; Determine representative concentrations in areas of high population density; Determine the impact on ambient pollution levels of significant sources or source categories; Determine general background concentration levels; Determine the extent of regional pollution transport among populated areas; Determine the welfare – related impact in more rural and remote areas. The link between general monitoring objectives, site types and the geographical location of a monitoring station is defined as the spatial scale of representativeness, and the relationship is indicated in Table 1 (next page). The goal of each station is to represent a specific air parcel throughout which actual pollution concentrations are reasonably homogeneous. The spatial scales are defined in Appendix D, 1.2 of 40 CFR 58 as follows: ♦ Microscale defines concentrations in air volumes associated with area dimensions from 1 meter to 100 meters; ♦ Middle Scale defines concentrations typical of areas from 100 meters to 500 meters; ♦ Neighborhood Scale defines concentrations typical of areas with dimensions in the 0.5 to 4.0 kilometer range; ♦ Urban Scale defines the overall, city – wide conditions with dimensions in the 4 to 50 kilometer range; ♦ Regional Scale usually defines a rural area with dimensions as much as hundreds of kilometers; ♦ National and Global Scales represent concentrations which characterize nations and the globe as a whole (Pima County does not employ stations under this category). 6 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Table 1 Monitoring Site Types Highest Concentration Population Source Impact General / Background Regional Transport Welfare-Related Impacts Appropriate Spatial Scales Micro, Middle, Neighborhood, sometimes Urban Neighborhood, Urban Micro, Middle, Neighborhood Urban, Regional Urban, Regional Urban, Regional 7 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 1 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 2 9 2014 Ambient Air Monitoring Five Year Network Assessment and Plan III. PIMA COUNTY AIR QUALITY MONITORING NETWORK SUMMARY TABLES AND MAP Active Particulate and Lead Monitoring Sites for 2014 Table 2 Map # Pollutant Site Name 2498 N. Geronimo Geronimo 4 PM 10 5 PM 10 1601 S. 6th Ave. South Tucson 6 PM 10 1016 W. Prince Rd. Prince Road 8 PM 10 22000 S. Houghton Rd. 9 PM 10 6910 S. Santa Clara Ave. 10 PM 10 Corona de Tucson Santa Clara School Green Valley 11 PM 2.5 Address PM 2.5 PM 2.5 12 PM 10 13 PM 10 PM 2.5 601 N. La Canada Dr. Pb 400 W. River Rd. 3401 W. Orange Grove Rd. Children’s Park NCore Orange Grove 12101 N. Camino de Oeste Tangerine 14 PM 2.5 710 W. Michigan 15 PM 2.5 9597 N. Coachline Blvd. Rose Elementary Coachline PM 2.5 as studies require Mobile 2 PM 10 Map located on Page 12 10 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Active Gaseous Pollutant Monitoring Sites for 2014 Map # 2 3 Pollutant CO NO 2 CO 10 11 O3 O3 CO O3 SO 2 NO 2 NO Y Table 3 Address Site Name 1237 S. Beverly Ave. 22nd & Craycroft 3895 E. 22nd St. 22nd & Alvernon 601 N. La Canada Dr. Green Valley 400 W. River Rd. Children’s Park NCore 13 O3 12101 N. Camino de Oeste Tangerine 14 O3 710 W. Michigan Rose Elementary 15 O3 9597 N. Coachline Blvd. Coachline 2745 N. Cherry Ave. Cherry & Glenn 16 CO 17 O3 11330 S. Houghton Rd. Fairgrounds 18 O3 3905 S. Old Spanish Trail Saguaro National Park, East Golf Links & Kolb 23 CO 2601 S. Kolb Rd. Map located on page 12 11 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 2014 Ambient Air Monitoring Network Summary Table Table 4 CARBON MONOXIDE - PIMA COUNTY MONITORING NETWORK SITE NAME AND LOCATION SITE ID (a) PARAMETER (b) 22ND & CRAYCROFT 004-019-1011 42101 CLASSIFICATION (c) DATES (d) SLAMS Jul-73 004-019-1014 42101 SLAMS 004-019-1028 42101 SP SMPL FREQ (i) POC (j) MONITORING SITE TYPE (h) 158 2582 4.1 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE Mar-75 174 2516 3.4 MICROSCALE CONTINUOUS 1 HIGHEST CONCENTRATION Oct-98 554 2286 4.25 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE 54 2400 4.9 NEIGHBORHOOD Cont/Seasonal 1 POPULATION EXPOSURE 1 HIGHEST CONCENTRATION PRESENT 400 W. RIVER ROAD CHERRY & GLENN SPATIAL SCALE (h) PRESENT 3895 E.22ND STREET CHILDREN'S PARK NCore ELEV. SMPL FEET (f) HEIGHT (M) (g) PRESENT 1237 S. BEVERLY AVE. 22ND & ALVERNON METHOD (e) 004-019-1021 42101 SP Feb-89 PRESENT 2745 N. CHERRY AVE. Jan. 1 –March31 Oct. 1- Dec. 31 GOLF LINKS & KOLB 004-019-1031 42101 SP Sept-02 093 2661 3 MICROSCALE PRESENT 2601 SOUTH KOLB Cont/Seasonal Jan. 1 – March31 Oct. 1- Dec. 31 NITROGEN DIOXIDE - PIMA COUNTY MONITORING NETWORK SITE NAME AND LOCATION SITE ID (a) PARAMETER (b) 22ND & CRAYCROFT 004-019-1011 42602 CLASSIFICATION (c) DATES (d) SLAMS Jan-73 ELEV. SMPL SPATIAL FEET (f) HEIGHT SCALE (h) (M) (g) SMPL FREQ (i) POC (j) MONITORING SITE TYPE (h) 157 2582 4.1 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE 090 2286 4.25 NEIGHBORHOOD CONTINUOUS 1 HIGHEST CONCENTRATION PRESENT 1237 S. BEVERLY AVE. CHILDREN'S PARK NCore METHOD (e) 004-019-1028 42602 SP May-98 PRESENT 400 W. RIVER ROAD REACTIVE OXIDES OF NITROGEN - PIMA COUNTY MONITORING NETWORK CHILDREN'S PARK NCore 400 W. RIVER ROAD 004-019-1028 42600 SLAMS Oct-10 674 PRESENT Key located on page 16 13 2286 10.0 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 2014 Ambient Air Monitoring Network Summary Table SULFUR DIOXIDE -PIMA COUNTY MONITORING NETWORK SITE NAME AND LOCATION SITE ID (a) PARAMETER CLASSI(b) FICATION (c) DATES (d) CHILDREN'S PARK NCore 004-019-1028 Oct-10 42401 SLAMS METHOD (e) ELEV. SMPL FEET (f) HEIGHT (M) (g) 560 2286 4.25 SPATIAL SCALE (h) SMPL FREQ (i) NEIGHBORHOOD CONTINUOUS POC (j) MONITORING SITE TYPE (h) 1 POPULATION EXPOSURE PRESENT 400 W. RIVER ROAD OZONE -PIMA COUNTY MONITORING NETWORK SITE NAME AND LOCATION SITE ID (a) PARAMETER CLASSI(b) FICATION (c) 22ND & CRAYCROFT 004-019-1011 44201 SLAMS 004-019-1030 44201 SP 004-019-1028 44201 SLAMS 004-019-1018 44201 SP 004-019-1032 44201 SP 004-019-1034 44201 SP 004-019-1020 44201 SP 3905 S. OLD SPANISH TRAIL 4.1 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE July-03 047 2910 3.1 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE Sep-97 047 2286 4.25 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE Oct-89 047 2638 3.75 URBAN CONTINUOUS 1 HIGHEST CONCENTRATION July-03 047 2387 4.1 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE July-03 047 2110 3.1 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE Oct-89 047 3078 3.6 URBAN CONTINUOUS 1 BACKGROUND 047 3089 4.1 NEIGHBORHOOD CONTINUOUS 1 HIGHEST CONCENTRATION PRESENT 11330 S. HOUGHTON RD. SAGUARO NATIONAL PARK 2582 PRESENT 9597 N. COACHLINE BLVD FAIRGROUNDS 047 PRESENT 710 W. MICHIGAN COACHLINE POC (j) MONITORING SITE TYPE (h) PRESENT 12101 N. CAMINO DE OESTE ROSE ELEMENTARY SMPL FREQ (i) PRESENT 400 W. RIVER ROAD TANGERINE SPATIAL SCALE (h) PRESENT 601 N. LA CANADA DR. CHILDREN'S PARK NCore Jul-73 METHOD (e) ELEV. SMPL FEET (f) HEIGHT (M) (g) PRESENT 1237 S. BEVERLY AVE. GREEN VALLEY DATES (d) 004-019-0021 44201 SLAMS Jun-82 PRESENT Key located on page 15 14 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 2014 Ambient Air Monitoring Network Summary Table PM10- PIMA COUNTY MONITORING NETWORK SITE NAME AND LOCATION SITE ID (a) PARAMETER (b) CLASSI- DATES (d) FICATION (c) GERONIMO 04-019-1113 SP 81102 04-019-1001 81102 SLAMS 04-019-1009 81102 SLAMS 04-019-0008 81102 SLAMS 04-019-1026 81102 SP 04-019-1030 81102 SP 04-019-0011 81102 SLAMS 04-019-1018 81102 SP CONTINUOUS 1 POPULATION EXPOSURE Sep-88 127 2420 6.9 NEIGHBORHOOD 1 DAY 1 POPULATION EXPOSURE collocated every 6 day Jul-87 126 2315 4.6 MICROSCALE 6 DAY 1 SOURCE ORIENTED Mar-87 126 3078 2.1 REGIONAL 6 DAY 1 BACKGROUND Jul-94 126 2540 6.45 NEIGHBORHOOD 6 DAY 1 POPULATION EXPOSURE Feb-01 079 2910 4.25 NEIGHBORHOOD CONTINUOUS 1 POPULATION EXPOSURE Jan-85 2234 2.65 NEIGHBORHOOD 1 DAY 2 HIGHEST CONCENTRATION 127 collocated every 6 day Jan-94 126 2638 4 .5 URBAN 6 DAY 1 BACKGROUND 176 2286 3.1 NEIGHBORHOOD 3 DAY 1 POPULATION EXPOSURE 1 POPULATION EXPOSURE PRESENT 12101 N. CAMINO DE OESTE CHILDREN'S PARK NCore NEIGHBORHOOD PRESENT 3401 W. ORANGE GROVE RD. TANGERINE 4.6 PRESENT 601 N. LA CANADA DR. ORANGE GROVE 2452 PRESENT 6910 S. SANTA CLARA AVE. GREEN VALLEY 122 PRESENT 22000 S. HOUGHTON RD. SANTA CLARA POC (j) MONITORING SITE TYPE (h) Closed Mar - 14 1016 W. PRINCE RD. CORONA DE TUCSON SMPL FREQ (i) PRESENT 1601 S. 6TH AVE. PRINCE ROAD June- 07 SPATIAL SCALE (h) PRESENT 2498 N. GERONIMO SOUTH TUCSON METHOD (e) ELEV. SMPL FEET (f) HEIGHT (M) (g) 004-019-1028 86101 SLAMS Jan-11 PRESENT 400 W. RIVER ROAD LEAD -PIMA COUNTY MONITORING NETWORK CHILDREN'S PARK NCore 400 W. RIVER ROAD 004-019-1028 14129 SLAMS Feb-12 110 PRESENT 15 2286 2.0 NEIGHBORHOOD 6DAY Collocated every 12days 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 2014 Ambient Air Monitoring Network Summary Table PM2.5- PIMA COUNTY MONITORING NETWORK SITE NAME AND LOCATION SITE ID (a) GERONIMO 004-019-1113 PARAMETER (b) 88501 CLASSI- DATES (d) METHOD (e) ELEV. SMPL FICATION FEET (f) HEIGHT (c) (M) (g) SPATIAL SCALE (h) SP July-03 SMPL FREQ (i) POC MONITORING (j) SITE TYPE (h) 733 2452 4.6 NEIGHBORHOOD CONTINUOUS 3 POPULATION EXPOSURE 733 2910 4.8 NEIGHBORHOOD CONTINUOUS 3 POPULATION EXPOSURE 118 2286 3.1 NEIGHBORHOOD 3 DAY 1 POPULATION EXPOSURE 810 2286 3.0 5 POPULATION EXPOSURE 170 2286 4.3 NEIGHBORHOOD CONTINUOUS 3 118 2234 2.65 NEIGHBORHOOD 3 DAY 1 POPULATION EXPOSURE 733 2387 4.9 NEIGHBORHOOD CONTINUOUS 3 POPULATION EXPOSURE 733 2100 4.9 NEIGHBORHOOD CONTINUOUS 3 POPULATION EXPOSURE PRESENT 2498 N. GERONIMO 004-019-1030 GREEN VALLEY 88501 SP 601 N. LA CANADA DR. CHILDREN'S PARK NCore July-03 PRESENT 004-019-1028 88101 SLAMS 004-019-1028 88502 SLAMS Jan-99 PRESENT 400 W. RIVER ROAD CHILDREN'S PARK NCore Feb-02 collocated every 6 day 3 DAY PRESENT 400 W. RIVER ROAD CHILDREN’S PARK NCore 004-019-1028 88101 SLAMS Jan-11 POPULATION EXPOSURE PRESENT 400 W. RIVER ROAD 004-019-0011 ORANGE GROVE 88101 SLAMS 3401 W. ORANGE GROVE RD. 004-019-1032 ROSE ELEMENTARY Jan-99 PRESENT 88501 SP July-03 PRESENT 710 W. MICHIGAN 004-019-1034 COACHLINE 9597 N. COACHLINE BLVD Key: 88501 SP July-03 PRESENT a - Site ID - site identification code used in the AQS database b - Parameter - code used in the AQS database to describe the pollutant monitored c - Classification – described on page 2 d - Dates - dates sampling began and ended e - Method - code used in the AQS database indicating the type of instrument used f - Elev. feet - site elevation in feet g - SPL (M) Height - sample inlet height in meters, specific height range required for uniform collection h - Spatial Scale and Monitoring site type - described on page 6 i - SMPL Freq - frequency of sampling days j - POC - parameter occurrence code used to distinguish between two or more instruments measuring the same parameter at the same time Information provided based on EPA'S 2014 Air Quality System (AQS) data. 16 2014 Ambient Air Monitoring Five Year Network Assessment and Plan IV. CURRENT MONITORING NETWORK EVALUATIONS PM 10 MONITORING NETWORK REQUIREMENTS The PDEQ PM 10 network consists of nine monitoring sites in eastern Pima County, Arizona, with MSA 8520. The 2014 network used several different types of PM 10 samplers: R& P Partisol 2000, R& P Partisol-Plus 2025 Sequential, BAM 1020 and TEOM 1400. 40 CFR 58, app. D, 4.6 Particulate Matter (PM 10 ) design criteria, provided guidance in determining the minimum number of required PM 10 SLAMS sites for 2014. 2014 PM 10 Design Criteria Table 5 Population Pima County 2010 Census 980,263 MSA 8520 Tucson Population Category 500,000 – 1,000,000 Design Value (2012-2014) 0.7 (South Tucson) Including flagged exceptional event 0.0 (all SLAMS sites)Excluding flagged exceptional events PM 10 Sites # Required PM 10 Sites # Operating Requires 4-8 SLAMS monitors 4 SLAMS monitors- 3 SLAMS as of March, 2014 No requirement for SP No requirement 4 SP monitors Medium concentration requires 2-4 SLAMS monitors 1 NCore for PMCoarse 4 SLAMS monitors- 3 SLAMS as of March, 2014 Max Concentration site Max Concentration 3 (µg/m ) Geronimo 174 South Tucson 149 Violation History The PM 10 24 hour standard remains at 150 µg/m3. Since the promulgation of the PM 10 standard, July 31, 1987, exceedances of the 24 hour standard have been recorded at monitoring sites in the PDEQ PM 10 network. The Orange Grove site recorded two exceedances of the NAAQS during the 4th quarter of 1988 and the Downtown site recorded three during the 2nd quarter of 1989 (Downtown site was discontinued, September 1999). In 1999, the PM 10 standard was violated with four recorded exceedances at the Orange Grove location and two exceedances at the South Tucson location. Subsequently, the monitoring schedules for the Orange Grove and South Tucson locations have been changed from every six day sampling to every day sampling, as indicated in 40 CFR 50, app. K and 40 CFR 58.13. In 2002 and 2003 there were a total of two exceedances at the Orange Grove location and two exceedances at the South Tucson location. These exceedances do not constitute a violation of the standard. In 2008, there was one exceedance of the standard at the Santa Clara site, which is in the process of an Exceptional Event designation dependent on approval from EPA. In 2009 there was one exceedance at the Orange Grove, South Tucson and Geronimo locations on July 22nd, these exceedances may also be considered as an Exceptional Event dependant on approval from EPA. In 2013, one exceedance on April 8 at the South 17 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Tucson location and on April 9th there was one exceedance each at the South Tucson, Geronimo, and Green Valley stations. These exceedances may also be considered as an Exceptional Event dependent on approval from EPA. In 2014, there was three exceedances on July 25 at the Green Valley, Geronimo, Orange Grove monitoring sites. These exceedances may also be considered as an Exceptional Event dependent on approval from EPA. 18 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Quality Assurance for Particulate Matter PM 10 All data quality assessment requirements, as outlined in 40 CFR 58, app. A, have been met for 2014. The precision of PM 10 data is derived from the co-located PM 10 samplers at the South Tucson and Orange Grove sites; the difference in concentration between the two samplers running side-by-side is used to calculate the precision of the data. At the end of each calendar quarter, a combined precision probability interval for monitors is calculated by EPA. The accuracy of PM 10 sampling is assessed by auditing the flow rate of at least 25% of the samplers each calendar quarter, such that each sampler is audited at least once per year. The difference in the flow rate between the audit flow measurement and the flow indicated by the sampler is used to calculate accuracy. Protocol Flow rate verification Flow Rate Audit Flow rate verification Flow Rate Audit Instrument Met One BAM 1020 R&P TEOM 1400 TEOM 1400AB Table 6 Frequency Date Completed 2014 Weekly Quarterly Green Valley 03/20, 06/10, 09/24, 11/24 Bam 1020 Geronimo 03/04, 06/02, 09/24, 12/08 R& P Partisol 2000, Monthly R& P Partisol-Plus 2025 Sequential R& P Partisol 2000, Quarterly R& P Partisol-Plus 2025 Sequential Corona de Tucson 03/07,06/06, 09/24, 11/26 Santa Clara 03/20, 06/06, 09/25, 11/26 Prince Road 03/04 Tangerine 03/13, 06/02, 09/25, 11/26 South Tucson 03/12, 06/06, 09/24,11/24 South Tucson (co-located) 03/12, 06/06, 09/24, 11/24 Orange Grove 03/04, 06/02, 09/25, 11/26 Orange Grove (co-located) 03/04, 06/02, 09/25, 11/26 Children’s Park NCore 03/11, 06/06, 09/25, 12/08 None for 2014 NPAP Audit Method 81102 Table 7 Collocated PM 10 Monitors # Required # Primary Collocation Monitors Monitors 1 8 19 # Collocated Monitors 2 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Table 8 Annual summary statistics: NAAQS: 150 µg/m3 24- Hour Average. Orange Grove 0011 158 2nd Annual Highest Average 24-Hour Value 117 27.0 Corona de Tucson 0008 Santa Clara 1026 82 57 16.8 108 69 25.4 Green Valley 1030 Geronimo 1113 170 104 13.7 174 143 27.1 Highest 24- Hr Value Year 2014 Site Prince Road * * 1009 Tangerine 95 53 1018 South Tucson 149 101 1001 *site closed March, 2014 * 18.8 27.7 Particulate Matter Weigh Lab Pima County Department of Environmental Quality operates a filter weigh lab for the processing of Pima County’s PM 10 and PM 2.5 network filters, excluding PM 2.5 speciation filters. This weigh lab follows all requirements set forth in Appendix L of 40 CFR 50. Sampling Schedule Calculation The design value for the Tucson area network was determined using the PM 10 SIP Development Guideline, Section 6.3.1 “Table look-up” procedure. Three years of sampling data, 2012 – 2014, were used. For that period, the Geronimo monitoring location was determined to have the highest design value (including possible exceptional events). That value was 174µg/m3. The ration of this value to the 24 hour standard of 150 µg/m3, 1.2, was then compared to the brackets in Figure 1 from 40 CFR 58.12(e) to arrive at a minimum PM 10 sampling frequency of every day. 20 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Population Growth and Distribution in the PM 10 Network Figure 4 (next page) represents a Thiessen Polygon analysis showing 1990 population distribution, and population distribution and growth for the years 2000, 2010 and 2015. Each polygonal area shows population distribution and growth represented by the PM 10 monitor in that area. 2015 data demonstrates a slowdown in growth compared to previous years, with most of the growth surrounding the Tangerine monitor in the northwest portion of the TAPA, and areas to the south and east represented by the Green Valley and Corona de Tucson monitors. All current PM 10 monitors are fulfilling their intended purposes, with the exception of the Tangerine monitor, but as the analysis shows, there are two areas that do not have representation. The northeast area of the MSA has incurred less overall growth in the past fifteen years compared to other areas, but is populated with similar density to other areas, and is somewhat isolated from the predominant down valley air flow. The other area without representation is the Avra Valley area, which is separated by the Tucson Mountains from the airshed over most of the TAPA. These shortcomings were pointed out in the previous network assessment, and to date, funding and available staffing are still the limiting factors to addressing these concerns. The Tangerine monitor is currently classified as Urban Scale, Background site type, which is no longer appropriate. Developments in recent years have encroached on the site to within 50 meters to the west, and low-density housing is being built 150 meters to the south. Other development along the Tangerine Road corridor will surely follow, particularly after the Tangerine Road widening project, projected to begin construction in 2016, is completed. This station has been in continuous operation since 1994 for PM 10 . Despite the increases in construction, population density and resultant traffic, concentrations remain fairly low under normal meteorological circumstances. To more closely conform to appropriate classification, PDEQ will be submitting a request to re-designate the site to a Neighborhood spatial scale, and Population Exposure site type. 21 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 4 22 2014 Ambient Air Monitoring Five Year Network Assessment and Plan PM 2.5 MONITORING NETWORK REQUIREMENTS The PDEQ PM 2.5 network consists of six monitoring sites in eastern Pima County, Arizona, 40 CFR 58.20, App. D. 4.7. PM 2.5 design criteria, provided guidance on the required number of SLAMS monitors. Two SLAMS Federal Reference Method (FRM) monitors were initiated in January, 1999 at the Orange Grove and Children’s Park sites. In addition to two SLAMS monitors, Pima County has four Special Purpose hourly monitors. Each PM 2.5 monitor MSA is Tucson, AZ 8520 except for the Green Valley monitors with a CBSA 46060. 2014 PM 2.5 Design Criteria Table 9 PM2.5 SLAMS (FRM and FEM) Population MSA 8520 Design Value Annual Daily PM 2.5 Sites PM 2.5 Sites Pima Tucson Site Design Design # Required # Operating County Population Value Value Years 2010 Category Years 2012Census 20122014 2014 980,263 500,000 – 1,000,000 Method 88101 Method 118 88101 POC 3 Method 170 Orange Grove 5.8µg/m3 14µg/m3 Requires 1 SLAMS Monitor <85% of NAAQS 2 SLAMS Monitors Table 10 Collocated PM 2.5 Monitors # Required Collocation # Primary Monitors Monitors 1 2 # Collocated Monitors 1 1 1A 1 A BAM 1020 FEM at Children’s Park NCore site is collocated with a PM2.5 FRM , that does not meet inlet separation requirements at this time. General Statement regarding changes to the PM 2.5 network: PDEQ does not have any violating monitors or proposals to move or change any monitors at this time. In the event of changes to the PM 2.5 network or violating monitors, PDEQ would detail all information and present it to the public for comment and would forward all comments and information to EPA for approval. After approval, PDEQ would then initiate any changes. 23 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Regional Transport or Background: ADEQ operates an FEM monitor at their Alamo Lake site for regional background, and an FEM monitor at their Yuma Supersite for regional transport. The SLAMS FRM monitors are filter-based low-volume samplers that collect a sample for 24 hours on a 1 in 3 day cycle. A co-located sampler at the Children’s Park NCore site runs on a 1 in 6 day cycle for precision assessment. Continuous PM 2.5 monitoring was initiated in May, 2000 at the Green Valley site using Beta Mass Attenuation and a very sharp-cut cyclone. This installation was a pilot project and was followed by similar installations at the Rose Elementary and Coachline monitoring sites. All three sites were a part of the EMPACT project (Environmental Monitoring for Public Access and Community Tracking), designed to provide near real-time data to the public via the internet and PDEQ web pages. A fourth monitor was added at the Geronimo site to provide fine particulate data for AQI reporting. The Met One BAM 1020 monitors provide automatic concentration measurement on an hourly basis, and output the reading to the site data logger, which is then polled every hour, and the data posted on the PDEQ website. The data obtained by both FRM and continuous PM 2.5 monitors in Tucson are submitted quarterly to the EPA’s Air Quality System (AQS) database. Pima County Department of Environmental Quality operates a filter weigh lab for the processing of Pima County’s PM 10 and PM 2.5 network filters, excluding PM 2.5 speciation filters. This weigh lab follows all requirements set forth in 40 CFR 50, App. L. The PM 2.5 Chemical Speciation Trends Network was established by EPA in 1999 to determine the chemical speciation of fine particulates. PM 2.5 speciation monitoring began in Pima County at the Children’s Park location in February, 2002. The samples are analyzed for total mass, forty eight elements, cations, nitrate, sulfate, organic and elemental carbon. Analysis and reporting is completed by RTI International. Summary PM 2.5 data for 2014 is included in this report. Violation History The old PM 2.5 standard (December 17, 2006): the annual PM 2.5 standard is met when the three year average of the spatially averaged annual mean is less than or equal to 15ug/m3 and the 24 hour standard is met when the three year average of the 98th percentile value at each site is less than or equal to 35ug/m3. The new PM 2.5 standard (December 14, 2012): the annual PM 2.5 standard is met when the three year average of the spatially averaged annual mean is less than or equal to 12ug/m3 and the 24 hour standard is met when the three year average of the 98th percentile value at each site is less than or equal to 35ug/m3. No exceedances of the annual or 24 - hour NAAQS were recorded in Tucson in 2014. Quality Assurance for Particulate Matter PM2.5 All data quality assessment requirements as outlined in 40 CFR 58, app. A have been met in 2014, and include both internal and EPA PEP audits, and the co-located sampler at the Children’s Park NCore site. The accuracy of PM 2.5 sampling is assessed by auditing the flow rate each calendar quarter. The difference in the flow rate between the audit flow measurement and the flow indicated by the sampler is used to calculate accuracy. A combined accuracy probability interval is calculated for PM 2.5 along with 24 2014 Ambient Air Monitoring Five Year Network Assessment and Plan separate probability limits for each audit concentration level for automated analyzers. Pima County reports the results of all valid precision and accuracy tests on a quarterly basis to the Air Quality System (AQS) database. Table 11 Protocol Flow rate verification Flow Rate Audit Instrument Met One BAM 1020 Frequency Weekly Date Completed 2014 Met One BAM 1020 Quarterly Green Valley 03/20, 06/10, 09/24, 11/24 Geronimo 03/04, 06/02, 09/24, 12/08 Rose Elementary 03/20, 06/10, 09/24, 11/24 Coachline 03/13, 06/02, 09/25, 11/26 Children’s Park 03/11, 06/05, 09/25, 12/08 Flow rate verification R& P Partisol-Plus 2025 Sequential R & P 2000 R& P Partisol-Plus 2025 Sequential R& P 2000 (Co- located) Met One SASS (Speciation) URG – 3000N (Speciation) Monthly Flow Rate Audit Quarterly Orange Grove 03/04, 06/02, 09/25, 11/16 Children’s Park 03/11, 06/05, 09/25, 12/08 Children’s Park (Co-located) 03/11, 06/05, 09/25,12/08 Children’s Park (Speciation, SASS) 06/05, 05/29, 09/26, 12/08 Children’s Park (Speciation, URG) 03/11, 06/05, 09/26, 12/08 NPAP Audit None Table 12 Annual summary statistics: NAAQS PM 2.5 : 15 µg/m3 Annual Average, 35 µg/m3 24 Hour Average. Highest 24 Hr Value 2nd Highest Value 98th % Annual Value Average Orange Grove 21.0 20.3 16.7 6.27 Children’s Park (Meth. 118) 16.9 15.8 14.3 5.58 Children’s Park (Meth. 170) 29.8 20.4 11.9 5.57 Green Valley 30.2 12.7 9.4 3.01 Geronimo 34.7 23.9 16.1 7.36 Rose Elementary 24.9 24.1 15.8 6.68 Coachline 25.2 24.3 12.6 6.15 Year 2014 Site 25 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Population Growth and Distribution in the PM 2.5 Network Figure 5 (next page) represents a Thiessen Polygon analysis showing 1990 population distribution, and population distribution and growth for the years 2000, 2010 and 2015. Each polygonal area shows population distribution and growth represented by the PM 2.5 monitor in that area. 2015 data demonstrates a slowdown in growth compared to previous years, with most of the growth in the northwest portion of the TAPA, and areas to the south and east. All current PM 2.5 monitors are fulfilling their intended purposes, but as the analysis shows, there are some areas that do not have representation. The northeast area of the MSA has incurred less overall growth in the past fifteen years compared to other areas, but is populated with similar density to other areas, and is somewhat isolated from the normal down valley air flow. Considering the fairly high traffic volumes of arterial roadways in this area and the potential for stagnation due to the topography, PM 2.5 monitoring in this area would be appropriate. The other areas without representation are the Avra Valley area, which is separated by the Tucson Mountains from the airshed over most of the TAPA, and the east side of the TAPA. The Avra Valley area is less of a concern for PM 2.5 , considering the more rural aspect of the area, and the abundance of unpaved roads in the mostly wildcat development, and agricultural activity contributing more to PM 10 particulate matter from crustal origins. The east side of the TAPA is the prevailing upwind section of the MSA, and is also less likely to incur significant PM 2.5 concentrations. This was demonstrated by operating a PM 2.5 BAM for smoke monitoring due to wildfires for an 18 month period at the Golf Links / Kolb carbon monoxide station in 2011 and 2012. Therefore, the only area under consideration for additional PM 2.5 monitoring is the northeast area, and this would be contingent on funding and staffing. 26 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 5 27 2014 Ambient Air Monitoring Five Year Network Assessment and Plan PM 10 - 2.5 (PM-Coarse) MONITORING NETWORK REQUIREMENTS 2013 Ambient Air Monitoring Network Plan Pima County is monitoring for PM- Coarse at the Children’s Park NCore station as part of the monitoring requirements for an NCore station. PM-Coarse is the arithmetic difference between separate but concurrent collocated measurements of PM10 and PM2.5, also referred to as PM10-2.5. Pima County is following the requirements set forth in 40 CFR Part 50, App O. The collocation for PM 10-2.5 is fulfilled by the national NCore Network. The PM2.5 portion of this method is the monitor described on page 46. The PM10 monitor is described on page 50. Year 2014 Children’s Park NCore PM10 - PM2.5 (86101) Table 13 Annual summary statistics Highest 24- Hr 2nd Highest 24Value Hour Value 49.0 47.0 28 Annual Average 13.77 2014 Ambient Air Monitoring Five Year Network Assessment and Plan OZONE MONITORING NETWORK REQUIREMENTS Ozone (O 3 ) is currently being monitored at seven locations in Tucson and one location in Green Valley. Pima County monitors year round for ozone. EPA has revised the minimum monitoring requirements for ozone. The design criteria for ozone monitoring is described in 40 CFR 58, app. D, Table D-2. Ozone monitors have MSA 8520. Population Pima County 2010 Census 980,263 MSA 8520 Tucson Population Category 500,000 – 1,000,000 Table 14 2014 O 3 Design Criteria Design Value 8- Hour Design Site Value (2012-2014) Saguaro Park 040190021 .071 ppm O 3 Sites # Required O 3 Sites # Operating Requires 2 SLAMS Monitors No Requirement for SP 3 SLAMS Monitors 5 SP Monitors Violation History On March 12, 2008, EPA strengthened the ground level ozone standard, effective May 27, 2008. The primary standard of 0.08 ppm has been lowered to 0.075 ppm, keeping the form of the standard as the three year average of the fourth highest daily maximum eight hour average ozone concentration. The secondary standard is identical to the primary standard. While higher maximum one hour and second high one hour ozone values tend to be measured near the urban core, the more suburban and rural sites measure higher overall average ozone concentrations. In general the east side (Saguaro National Park East) is the area with the highest average ozone levels. The situation may be caused by the topography of the valley and the way air flows within it. The precursor pollutants are emitted, and in conjunction with sunlight and heat, will form ozone, which is typically transported by air currents to outlying areas. Quality Assurance for Ozone All data quality assessment requirements outlined in 40 CFR 58, app. A, have been met in 2014. The requirements include precision checks a minimum of every other week with a check gas range between 0.01 and 0.10 ppm with Pima County performing the precision check at 0.075 ppm, representing the highest level we are likely to achieve. The annual internal audits for accuracy are performed with four point check levels at zero, 0.035ppm, 0.055ppm, and 0.085ppm. Pima County maintains an ozone primary standard which is verified annually for accuracy by the California Air Resources Board in Sacramento. Pima County passed the NPAP Ozone TTP Audit for 22nd and Craycroft. All valid precision and accuracy tests are reported to the Air Quality System (AQS) database on a quarterly basis. 29 2014 Ambient Air Monitoring Five Year Network Assessment and Plan OZONE MONITORING NETWORK REQUIREMENTS Table 15 Ozone Audit Dates 2014 22nd St. & Craycroft 06/26, 12/16 Children’s Park 03/25, 09/19 Fairgrounds 06/23, 12/29 Tangerine 03/13, 09/17 Saguaro Park 06/23, 12/29 Coachline 03/13, 09/17 Rose Elementary 06/10, 12/30 Green Valley 06/10, 11/24 NPAP Ozone TTP Audit Dates 2014 Tangerine 05/13, Children’s Park 05/14 Table 16 Annual summary statistics: NAAQS: 0.075 ppm 4th highest 8- Hour Average Year 2014 Site nd 1st Max. 1-HR Avg (ppm) 1st Max. 8- HR Avg (ppm) 4th Max. 8- HR Avg (ppm) .062 22 St. & Craycroft 1011 .071 .066 Children’s Park 1028 Fairgrounds .082 .077 .066 .075 .073 .064 .081 .078 .063 .082 .079 .069 .071 .070 .062 .075 .071 .061 .073 .067 .065 1020 Tangerine 1018 Saguaro Park 0021 Coachline 1034 Rose Elementary 1032 Green Valley 1030 30 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Population Growth and Distribution in the Ozone Network Figure 6 (next page) represents a Thiessen Polygon analysis showing 1990 population distribution, and population distribution and growth for the years 2000, 2010 and 2015. Each polygonal area shows population distribution and growth represented by the ozone monitor in that area. 2015 data demonstrates a slowdown in growth compared to previous years, with most of the growth in the northwest portion of the TAPA, and areas to the south and southeast. With ozone being one of the two primary pollutants of concern in Pima County, most of the TAPA has representation, considering the relatively homogenous nature of peak ozone concentrations throughout the area. Based on the population of the MSA and the most recent design value for ozone, two SLAMS monitors are required, and there is no requirement for additional monitors. PDEQ currently operates three SLAMS monitors, and will be requesting approval for re-designation of the remaining five Special Purpose monitors, for a total of eight SLAMS ozone monitors, four times the required minimum. Appropriate representation for ozone in Pima County has always been a priority, and current monitor locations provide widespread coverage of the populated portions of the TAPA, including areas with the most growth in the past 15 years, primarily the northwest area, represented by the Tangerine and Coachline monitors, and the southeast area, represented by the Fairgrounds and Green Valley monitors. Two monitors are located in areas that in the past were identified as having higher than normal pediatric asthma hospital admission rates. The Rose Elementary and Coachline monitors were installed in these areas to provide representation for these sensitive groups, and are located to provide an upwind / downwind component serving both a concentrated minority population and an area of newer subdivisions in the northwest portion of the MSA. No changes to the ozone monitoring network are proposed at this time. 31 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 6 32 2014 Ambient Air Monitoring Five Year Network Assessment and Plan CARBON MONOXIDE MONITORING NETWORK REQUIREMENTS Motor vehicles are the primary source of carbon monoxide (CO) in the Tucson area. The latest reports from the Arizona Department of Transportation (MVD) show that there were 940,571 vehicles registered in Pima County in 2012, compared with 923,271 in 2008 and 611,398 in 1998. In spite of increased vehicular traffic, CO levels have dropped considerably since the county began monitoring in 1973. The dramatic decrease can primarily be contributed to the progress made by automobile manufacturers in meeting federally mandated tailpipe emissions standards and to the state vehicle inspection / maintenance programs. Carbon Monoxide is monitored at five locations throughout the Pima County air quality control district with MSA 8520. The revised requirements for Carbon Monoxide 40 CFR 58, app. D, 4.2 state that there is no minimum number of CO monitoring sites required. Pima County is operating under the auspices of the CO Limited Maintenance Plan (LMP) and has maintained the same number of sites in order to meet and exceed the requirements of the LMP. Population Pima County 2010 Census 980,263 2014 CO Design Criteria Table 17 MSA 8520 1- Hour CO Monitors Tucson Design Value # Required Population Category 2013-2014 500,000 – 1,000,000 1.8 ppm No Specific Requirement CO Monitors # Operating 2 SLAMS Monitors 3 SP Monitors Violation History No exceedances of the National Ambient Air Quality Standards for CO were recorded in Tucson in 1989 through 2014. In January 1988, the eight - hour health standard of nine parts per million was exceeded once at two monitoring sites on the same day. The last exceedance of the eight - hour standard prior to 1988 occurred in December 1986 at a special purpose microscale location (Broadway / Craycroft). Pima County’s status for CO was reclassified to attainment with the implementation of a Limited Maintenance Plan on April 25, 2000 by the EPA. The Carbon Monoxide Limited Maintenance Plan was developed in conjunction with Pima Association of Governments and approved by EPA to help mitigate any future violations. The plan allows for additional mobile monitoring of CO at high volume intersections, and a microscale site located at Golf Links & Kolb was established, September, 2002. 33 2014 Ambient Air Monitoring Five Year Network Assessment and Plan CARBON MONOXIDE MONITORING NETWORK REQUIREMENTS Quality Assurance for Carbon Monoxide All data quality assessment requirements as outlined in 40 CFR 58, app. A, have been met in 2014. The precision of SLAMS automated analyzers is based on one-point precision QC checks with a minimum frequency of every two weeks, when each analyzer is challenged by a known concentration of a check gas. For CO the concentrations are between 1.0 and 10.0 ppm. The requirements include annual audits performed in-house for accuracy. Three levels are reported of the four audit point levels that are used for CO. The audit levels are: level two at 0.900 -2.99 ppm, level three at 3.0-7.99 ppm, level four at 8.0-15.99 ppm and level five at 16.0-30.99 ppm. All valid precision and accuracy tests are reported to the Air Quality System (AQS) database on a quarterly basis. Table 18 Carbon Monoxide Audit Dates 2014 Craycroft & 22nd St. 06/26, 12/16 Children’s Park 03/25, 09/19 Cherry & Glenn; Seasonal 03/31, 12/31 Alvernon & 22nd St. 03/19, 09/17 Golf Links & Kolb; Seasonal 03/31, 12/26 NPAP Carbon Monoxide TTP Audit Dates 2014 Alvernon & 22nd St. 05/13, Children’s Park 05/14 Table 19 Annual summary statistics: NAAQS: 35ppm 1-Hour Average, 9ppm 8- Hour Average Year 2014 1st Max. 1- HR Avg 2nd Max. 1- HR Avg 1st Max. 8- HR Avg Site Craycroft & 22nd St 1011 1.9 1.6 0.9 0.8 Children’s Park 1028 1.0 0.9 0.8 0.7 Cherry & Glenn 1021 1.8 1.6 1.1 1.1 Alvernon & 22nd St. 1014 1.9 1.8 1.2 1.0 Golf Links & Kolb 1031 1.3 1.2 1.0 0.9 34 2nd Max. 8- HR Avg 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Population Growth and Distribution in the Carbon Monoxide Network Figure 7 (next page) represents a Thiessen Polygon analysis showing 1990 population distribution, and population distribution and growth for the years 2000, 2010 and 2015. Each polygonal area shows population distribution and growth represented by the carbon monoxide monitor in that area. 2015 data demonstrates a slowdown in growth compared to previous years, with most of the growth in the northwest portion of the TAPA, and areas to the south and east. Despite the distinguishing category of being the only gaseous criteria pollutant in Pima County to achieve non-attainment status, carbon monoxide levels have steadily declined from the levels of the 1980’s to current wintertime inversion measurements approximately one tenth of the standard. Current concentrations challenge the low-level measurement capabilities of instrumentation unless it has enhanced trace-level configuration with three decimal place accuracy. Two of the five CO monitors in Pima County are currently operated on a 0 to 5 ppm range (previously 0 to 50 ppm), and one of those monitors is located downwind of a busy intersection, designated as a highest concentration site type with a microscale spatial scale. This would seem a clear indicator that carbon monoxide is not a serious concern in Pima County, and a reduction in monitoring would be reasonable. However, due to the State Implementation Plan (SIP) 2008 revision under the Limited Maintenance Plan (LMP) option for Carbon Monoxide, in place to ensure continued compliance with the NAAQS, discontinuation of any CO monitors would require a comprehensive review and modification of the SIP, an endeavor significantly more involved than simply operating the two seasonal stations in the existing network that may qualify for discontinuation. The termination of the SIP/LMP coincides with the next network assessment, scheduled for 2020, and at that time the effective representation and operating costs of the CO network will be re-evaluated. 35 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 7 36 2014 Ambient Air Monitoring Five Year Network Assessment and Plan NITROGEN DIOXIDE MONITORING NETWORK REQUIREMENTS Nitrogen dioxide (NO 2 ) is currently measured at two locations in Tucson with MSA 8520. The Environmental Protection Agency has revised the NO 2 requirements. The 40 CFR 58, app. D, 4.3, design criteria document states that there are no minimum requirements for the number of NO 2 monitoring sites in Pima County. Pima County is included in phase three near road implementation and will not be required to install a monitoring station for this project until 2017. 2014 NO 2 Design Criteria Table 20 Population Pima County 2010 Census 980,263 MSA 8520 Tucson Population Category Annual Design Value 1- Hour 98th Percentile Design Value # of Required NO 2 Monitors # of NO 2 Monitors 500,000 – 1,000,000 11.2 ppb 45 ppb No Requirement 1 SLAMS Monitor 1 SP Monitor No Requirement Historical Nitrogen Dioxide Monitoring Nitrogen dioxide levels remain well within federal standards. The Craycroft and 22nd St. monitor has been operational since 1973, measuring typical neighborhood NO 2 concentrations. Much of the data has been used in studies measuring the effects of NO 2 as a precursor to ozone formation. A NOx analyzer was operating at the Pomona site from 1988 until 1996, when the site was closed. The re-establishment of the site at the Children’s Park location in May, 1998, allows for monitoring on the north side of Tucson and in the lower valley area. A NOx analyzer was operating at the Downtown site until early 1989. From 1995 to December 2001, NOx monitoring was conducted at Saguaro National Park East to establish baseline conditions in a Class I Wilderness Area. 37 2014 Ambient Air Monitoring Five Year Network Assessment and Plan NITROGEN DIOXIDE MONITORING NETWORK REQUIREMENTS Quality Assurance for NO 2 All data quality assessment requirements outlined in 40 CFR 58, app. A, have been met for 2014. The requirements include precision QC checks with a minimum frequency of every other week with a check gas range between 0.01 and 0.10 ppm and annual internal audits for accuracy with three point check levels between 0.008 - 0.019 ppm, 0.02 – 0.049 ppm and 0.05 – 0.099 ppm . All valid precision and accuracy tests are reported to the Air Quality System (AQS) database on a quarterly basis. 2014 precision and accuracy tests will be reported in ppb. Table 21 Nitrogen Dioxide Audit Dates 2014 Craycroft & 22nd St. 06/26, 12/16 Children’s Park 03/25, 09/19 Nitrogen Dioxide TTP Audit Dates 2014 None Table 22 Annual summary statistics: NAAQS: 100 ppb 1- Hour Average (98th percentile of the 1-hour concentrations averaged over three years); 53 ppb Annual Average Year 2014 1st Max. 1- Hour Avg 1 - Hour 98th Percentile Annual Mean Site Craycroft & 22nd St 1011 47.6 42.8 9.64 Children’s Park 1028 42.2 40.0 11.2 38 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Population Growth and Distribution in the Nitrogen Dioxide Network Figure 8 represents a Thiessen Polygon analysis showing 1990 population distribution, and population distribution and growth for the years 2000, 2010 and 2015. Each polygonal area shows population distribution and growth represented by the nitrogen dioxide monitor in that area. 2015 data demonstrates a slowdown in growth compared to previous years, with most of the growth in the northwest portion of the TAPA, and areas to the south and east. Nitrogen Dioxide monitoring has been ongoing in Pima County since 1975, at the 22nd/Craycroft station, and various other locations through the years. The Children’s Park monitor was added in 1998 as a permanent site, bringing the currently operational total to two. This neatly divides the TAPA, with upwind and downwind representation within the core of the MSA. As with carbon monoxide, NO 2 concentrations have steadily decreased from the levels recorded in the 1970’s and 1980’s. Unlike CO, however, NO 2 monitoring remains important in view of the ozone precursor aspect of this pollutant, and no reduction of monitors will occur. Instead, the number of monitors will increase to three when Tier III NO 2 Near-road monitoring is implemented in Pima County beginning in 2017. This will add a highest concentration site somewhere along the Interstate 10 corridor, and redefine the areas of representation. 39 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Figure 8 40 2014 Ambient Air Monitoring Five Year Network Assessment and Plan REACTIVE OXIDES OF NITROGEN (NO Y ) MONITORING NETWORK REQUIREMENTS Reactive Oxides of Nitrogen is currently monitored at one location in Pima County with MSA 8520 fulfilling the NCore site requirement. Quality Assurance for NO y All data quality assessment requirements outlined in 40 CFR 58, app. A, have been met for 2014. The requirements include precision QC checks with a minimum frequency of every other week with a check gas range between 0.01 and 0.10 ppm and annual internal audits for accuracy with three point check levels between 0.008 - 0.019 ppm, 0.02 – 0.049 ppm and 0.05 – 0.099 ppm . All valid precision and accuracy tests are reported to the Air Quality System (AQS) database on a quarterly basis. 2014 precision and accuracy tests will be reported in ppb. Table 23 Reactive Oxides of Nitrogen Audit Dates 2014 Children’s Park NCore 03/25, 09/22 Reactive Oxides of Nitrogen TTP Audit Dates 2014 None NPAP Audit Dates 2014 None Table 24 Annual summary statistics: reported in ppb 1st Max. Annual 1- Hour Avg Mean Year 2014 Site Children’s Park 1028 134.2 41 12.3 2014 Ambient Air Monitoring Five Year Network Assessment and Plan SULFUR DIOXIDE MONITORING NETWORK REQUIREMENTS Sulfur Dioxide (SO 2 ) is currently monitored at one location in Pima County with MSA 8520. On October 1, 2010, an SO 2 trace monitor was added at the Children’s Park NCore location as required for an NCore site. The SO2 monitor at the 22nd and Craycroft was discontinued on December 31, 2010. The Environmental Protection Agency has revised the SO 2 requirements. The design criteria indicated in 40 CFR 58, app. D, 4.4, states that there are no minimum requirements for the number of SO 2 monitoring sites. 2014 SO 2 Design Criteria Table 25 Population Pima County 2010 Census MSA 8520 Tucson Population Category Total SO 2 [tons/year] Based on 2008 NEI Population 1- Hour Weighted Design Emissions Value Index # of Required SO 2 Monitors # of SO 2 Monitors No Requirement 1 NCore SLAMS [million persons- tons per year] 980,263 500,000 – 1,000,000 4850 4754 6.0 ppb Historical Sulfur Dioxide Monitoring Ambient concentrations of sulfur dioxide (SO 2 ) in Tucson have historically remained well below all federal standards, and in recent years have been extremely low. With new trace SO 2 monitoring we can now get more accurate readings at very low levels. The only major stationary sources of SO 2 possibly affecting ambient concentrations in the Tucson air planning area are the coal burning generators at the Irvington Road power plant operated by Tucson Electric Power, which are scheduled to be converted to natural gas in the future. Quality Assurance for SO 2 All data quality assessment requirements outlined in 40 CFR 58, app. A, have been met for 2014. The requirements include precision checks every other week with a check gas range between 0.01 and 0.10 ppm and annual internal audits for accuracy with three point check levels between 0.00038 - 0.0029 ppm, 0.0030 – 0.0049 ppm and 0.005 – 0.0079ppm . All valid precision and accuracy tests are reported to the Air Quality System (AQS) database on a quarterly basis. Table 26 Sulfur Dioxide Audit Dates 2014 Children’s Park NCore 03/26, 09/22 Sulfur Dioxide TTP Audit Dates 2014 Children’s Park NCore 05/14 42 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Table 27 Annual summary statistics: Sulfur Dioxide NAAQS: 75 ppb 1- Hour Average (99th percentile of the 1hour daily maximum concentrations, averaged over 3 years) Year 2014 1st Max. 1- Hour Avg 1–Hour 99th Percentile Annual Mean Site Children’s Park NCore 1028 9.6 5.6 0.20 Population Growth and Distribution in the Sulfur Dioxide Network No Thiessen Polygon analysis for sulfur dioxide was performed for the simple reason that there is only one SO 2 monitor in the TAPA, so the entire TAPA is the effective area of representation. SO 2 monitoring has a long history in Pima County at various locations, but with the closure of copper smelters in the region decades past, SO 2 concentrations have dropped to near zero, with an occasional spike up to a one hour reading at or below one tenth of the current standard. This will be further reduced when the only local significant source of SO 2 , at the Tucson Electric Power Sundt Generating Station, will be fully converted to natural gas in 2017. This will reduce the necessity of SO 2 monitoring to fulfilling the NCore requirement to operate a monitor at the Children’s Park station. 43 2014 Ambient Air Monitoring Five Year Network Assessment and Plan LEAD MONITORING NETWORK REQUIREMENTS Lead is currently monitored at the Children’s Park NCore location in Pima County with MSA 8520. On October 15, 2008 EPA strengthened the lead standard. Research and technology has shown that adverse health effects occur at much lower levels of lead in blood than previously thought. Children are particularly vulnerable to the effects of lead. The primary standard of 1.5 ug/m3 has been lowered to 0.15ug/m3, measured as total suspended particles (TSP).The secondary standard is identical to the primary standard. According to the 2005 National Air Emissions Inventory (NEI) from EPA, Pima County has no sources of lead of one ton or more. This means that Pima County is required to perform area monitoring only, which is done at the Children’s Park NCore location. Monitoring and reporting began in February 27, 2012. The sampling schedule for lead is based on the 2014 EPA’s monitoring sampling schedule with a one in six day schedule for the primary monitor and a one in twelve day schedule for the collocated lead monitor. The design criteria indicated in 40 CFR 58, app. D, 4.5, states that there is one required lead monitor. 2014 Lead Design Criteria Table 28 NCore Site Children’s Park 040191028 MSA 8520 Tucson Population Category 500,000 – 1,000,000 Population Pima County 2010 Census 980,263 Lead Design Value # Required monitors # of Pb Monitors 0.00 1 1- NCore 1- Collocated 44 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Historical Lead Monitoring Lead concentrations are extremely low in Tucson. Lead monitoring began in Pima County in 1975 at eight TSP sampling locations. In August, 1978, lead analyses were discontinued at all but two sites. Magnetic Observatory (University of Arizona) and Prince Road were selected to represent a neighborhood site and roadway site, respectively. Lead sampling was started at a third site (Broadway & Swan) in January 1983. Lead analysis at Magnetic Observatory was discontinued in 1983 due to lack of detectable levels of lead. A TSP sampler was installed at South Tucson in 1991 for purposes of lead analysis. This site, along with the other two remaining sites, (Prince Road and Broadway & Swan) adequately fulfilled the siting criteria for measuring potential highest urban concentrations of lead in the particulate monitoring network. In March of 1992 the Broadway & Swan lead analysis was discontinued and the TSP samplers from the South Tucson and the Magnetic Observatory sites were moved to the 22nd & Craycroft site. 22nd & Craycroft and Prince Road sites remained until March of 1997. Quality Assurance for Lead All data quality assessment requirements outlined in 40 CFR 58, app. A, have been met for 2014. The requirements include quarterly flow rate verification and audits. All valid precision and accuracy tests are reported to the Air Quality System (AQS) database on a quarterly basis. Protocol Flow rate verification Flow Rate Audit NPAP Audit Instrument Tisch Hi Vol with Brushless Motor Table 29 Frequency Date Completed 2014 Quarterly 01/16,03/25 ,4/16, 6/24, 8/28, 11/20, 12/10 Quarterly Collocated: 01/16, 03/25 ,4/16, 5/22, 6/24, 8/28, 11/20, 12/10 03/11, 06/05, 09/25, 12/08 Collocated: 03/11, 06/05, 09/25, 12/08 none Table 30 Annual summary statistics: NAAQS Lead: 0.15 µg/m3 three month average 1st Max. 2nd Max. Annual Year 24- Hour 24- HR Mean 2014 Avg Avg Site Children’s Park 1028 .007 .007 .0032 45 2014 Ambient Air Monitoring Five Year Network Assessment and Plan V. DETAILED SITE AND MONITOR INFORMATION CHILDREN’S PARK NCore: AQS # 040191028 Site Name AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description Site Description CHILDREN’S PARK NCore 040191028 400 W. River Road, Tucson, AZ 32.295150 / -110.982300 2286 Gravel in walled compound, dirt parking lot, dry river bed This site is located at the confluence of the Rillito River and Pima Wash, a natural low spot in the local topography. Single - family residences and a popular county park with exercise trails extend to the north, northwest, and west, respectively. Heavy commercial usage dominates to the south and east, including large shopping malls and automobile dealerships. 46 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name CHILDREN’S PARK NCore Pollutant Method Code Number of monitors Parameter code / POC Basic monitoring objective / Statement of Purpose Site Type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical Lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT PM 2.5 170 1 88101 / 3 NAAQS Comparison / Population Exposure Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E Population Exposure Met One / Bam 1020 FEM PDEQ / PDEQ n/a SLAMS NCore Neighborhood 359 0 0 Continuous 4.3 meters 360 1.73 meters n/a n/a 14.3 meters n/a 16.3 m / every 3 days / R&P 2025 ** see comments below Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. YES YES Comments: Continuous PM 2.5 sampling began at this neighborhood scale site on January 23, 2011. Colocation of the BAM 2.5 continuous monitor is currently limited to the FRM 2.5 sampler located on a platform near the shelter. 47 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method Code Number of monitors Parameter code/ POC Basic monitoring objective / Statement of Purpose Site Type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical Lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height PM 2.5 Primary 118 1 88101 /1 NAAQS Comparison / Population Exposure Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E Population Exposure R& P Partisol-Plus 2025 FRM PDEQ / PDEQ PDEQ SLAMS NCore Neighborhood 119 0 0 Every three days 3.1 meters above the ground on a platform located in a city water well site. 290, from 280 to 210, includes predominant wind direction from 135 (SE) 2.08 meters n/a n/a 8.0 meters n/a 1.2 meters /Every twelve days (after April 27, 2013 every six days) / R&P 2000 then R& P 2025 after Sept. 15, 2014 Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Yes Comments: Sampling began in 1999. 48 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method Code Number of monitors Parameter code/ POC Basic monitoring objective / Statement of Purpose Site Type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical Lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height PM 2.5 Collocated 118 1 88101 (POC 2 as of March, 2014) Collocated monitor / Requirement Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E Population Exposure R& P Partisol-Plus 2025 FRM PDEQ / PDEQ PDEQ SLAMS NCore Neighborhood 30 0 0 Every twelve days; after April 27, 2013 every six days 3.1 meters above the ground on a platform located in a city water well site. 270, from 290 to 200, includes predominant wind direction from 135 (SE) 2.08 meters n/a n/a 8.0 meters n/a 1.2 meters /Every twelve days (after April 27, 2013 every six days) / R&P 2000 then R& P 2025 after Sept. 15, 2014 Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Yes Comments: This is the collocated monitor for Children’s Park NCore PM 2.5 . 49 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method Code Number of monitors Parameter code / POC Basic monitoring objective / Statement of Purpose Site Type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical Lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height PM Coarse PM 10 -PM 2.5 (Other) 176 2 86101/ 1 Research support / NCore requirement Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ schedule / Collocated monitor type Nearest roads distance & direction to monitor /ADT Site meets 40 CFR 58, Appx. A,C,D,E Population exposure R& P Partisol-Plus 2025 Sampler Pair FRM PDEQ/ PDEQ PDEQ SLAMS NCore Neighborhood 111 0 0 Every three days 3.1 meters above the ground on a platform located in a city water well site. 290, from 280 to 210, includes predominant wind direction from 135 (SE) 2.08 meters n/a n/a 8.0 meters n/a 1.2 m / 1 in 3 days / n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: The subtraction method for determining the coarse PM fraction was initiated in 2011, using a matched pair of Partisol- Plus samplers. 50 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model PM 2.5 SPECIATION FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 810 1 88502/ 5 Research support for the Chemical Speciation Network (CSN) Population Exposure Met One Super SASS with URG 3000N / Super SASS on 6/26/14 Other Pima County Department of Environmental Quality/ RTP RTP SLAMS CSN Supplemental ; NCore Neighborhood 90 0 0 Every 3rd day 3 meters above the ground on a platform located in a city water well site. 290, from 290 to 200, includes predominant wind direction from 135 (SE) 1.83 meters n/a n/a SASS 5.2 meters n/a Collocation is fulfilled by the National NCore network. Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: Sampling began for PM 2.5 Speciation in 2000. 51 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Monitor Network Affiliation Scale Number of houly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height CARBON MONOXIDE Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 554 1 42101/ 1 NAAQS comparison / NCore requirement Population Exposure Thermo Scientific / 48i -TLE FRM PDEQ / PDEQ n/a Special Purpose Monitor NCore Neighborhood 8150 0 0 Continuous 4.25 meters above the ground on a shelter in a city water well site FEP Teflon/ 11.84 seconds 360 1.70 meters n/a n/a 14.0 meters n/a n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: This site began monitoring for Carbon Monoxide in October, 1998. 52 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height OZONE Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ schedule/collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 047 1 44201/ 1 NAAQS comparison / Maintenance of long term ozone monitoring at this location Population Exposure Thermo Scientific / 49i FEM PDEQ/ PDEQ n/a SLAMS NCore Neighborhood 365 One exceedance on June 6, 2014. One in 1999; One in 2002 Continuous 4.25 meters above the ground on a shelter located in a city water well site. FEP Teflon / 5.9 seconds 360 1.73 meters n/a n/a 16.4 meters n/a n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: This site began August of 1997 and is a relocation (1.5 kilometers, northeast) of the Pomona site. This site is representative of a neighborhood scale in the north central region of the air planning area where ozone levels are generally expected to be high due to the low altitude and the prevailing southeasterly winds. 53 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Monitor Network Affiliation Scale Number of hourly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height NITROGEN DIOXIDE Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ schedule/collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 090 1 42602/ 1 NAAQS comparison / Maintenance of long term monitoring at this location Highest Concentration Ecotech / 9841 T FRM PDEQ / PDEQ n/a Special Purpose Proposed NCore Neighborhood 7285 0 0 Continuous 4.25 meters above the ground on a shelter located in a city water well site FEP Teflon / 9.19 seconds 360 1.70 meters n/a n/a 12.8 meters n/a n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: The site began monitoring for Nitrogen Dioxide in May, 1998, and is a relocation (1.5 kilometers, northeast) of the Pomona site. 54 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / season Probe height REACTIVE OXIDES OF NITROGEN (NO Y ) Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ schedule/collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 574/ 674 1 42600/ 1 Research support / Comply with NCore requirements Population Exposure Thermo Scientific / 42i - Y n/a PDEQ / PDEQ n/a SLAMS NCore neighborhood 8562 0 0 Continuous 10.0 meters above the ground on a shelter located in a city water well site FEP Teflon / 0.6 seconds to converter; 6.1 seconds from converter to analyzer. 360 0.36 meters probe to mast; 7.31 meters probe to shelter n/a n/a 12.8 meters, horizontal, inlet well above tree tops n/a n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: The site began monitoring for reactive oxides of nitrogen in October, 2010 for the NCore site requirements, using a Thermo 42i-y instrument with remote converter mounted at the requisite 10 meters. 55 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of 1-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height SULFUR DIOXIDE Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 560 1 42401/ 1 NAAQS comparison / Comply with NCore requirements Population Exposure Thermo Scientific / 43i - TLE FEM PDEQ / PDEQ n/a SLAMS NCore neighborhood 8180 0 0 Continuous 4.25 meters above the ground on a shelter located in a city water well site FEP Teflon / 12.1 seconds 360 1.70 meters n/a n/a 14.0 meters n/a n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: Sulfur Dioxide sampling began October 1, 2010 to conform to NCore site requirements. 56 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method Code Number of monitors Parameter code / POC Basic monitoring objective/ Statement of Purpose Site Type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical Lab LEAD Primary Analytical Instrument / Method Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of rolling three month average standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 110 ICAP spectra (ICP-MS) 2 14129/ 1 NAAQS comparison / Comply with NCore requirements Population exposure Tisch Hi –Vol Plus n/a PDEQ/ PDEQ Pima County Regional Wastewater Reclamation Department (CRAO) ICAP Spectra (ICP-MS) / EQL-0510-191 SLAMS Proposed NCore Neighborhood 58 0 0 Every six days 2.0 meters 300, from 270 to 210, includes predominant wind direction from 135 (SE) n/a n/a n/a 8.4 meters n/a 2.3 m / 12 days/ Tisch Hi –Vol Plus Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: Lead sampling began February 27, 2012. 57 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method Code Number of monitors Parameter code / POC Basic monitoring objective/ Statement of Purpose Site Type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical Lab LEAD QA Collocated Analytical Instrument / Method Monitor type Monitor Network Affiliation Scale Number of daily observations Number / Dates of rolling three month average standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 110 ICAP spectra (ICP-MS) 2 14129 (POC 2 as of March, 2014) Collocated monitor / Comply with NCore requirements Population exposure Tisch Hi –Vol Plus n/a PDEQ/ PDEQ Pima County Regional Wastewater Reclamation Department (CRAO) ICAP Spectra (ICP-MS) / EQL -0510-191 SLAMS Proposed NCore Neighborhood 26 0 0 Every 12 days 2.0 m 290, from 270 to 200, includes predominant wind direction from 135 (SE) n/a n/a n/a 6.6 meters n/a 2.3 m / 12 days/ Tisch Hi –Vol Plus Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. Yes Comments: Lead sampling began February 27, 2012. 58 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name CHILDREN’S PARK NCore Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT METEOROLOGICAL DATA 061, 040, 011 4 61103, 61104, 62101, 62201 Research support / Source determination for criteria pollutants Site meets 40 CFR 58, Appx. A,C,D,E YES n/a WD/WS –MET ONE 50.5; Temp/RH – VAISALA HMP45 n/a PDEQ, PDEQ n/a n/a n/a 365 n/a n/a continuous WD/WS – 10m ; Temp/RH – 4.25m 360 n/a n/a n/a WD/WS – 16.5m ; Temp/RH – 12.8m n/a n/a Arizona State Route 77 runs north - south 0.5 kilometers to the east, providing six lanes of heavily used arterial routing with a 2012 ADT of 44,000. River Road runs east – west 0.5 kilometers to the north, with a 2010 ADT of 38,000. 59 2014 Ambient Air Monitoring Five Year Network Assessment and Plan GREEN VALLEY: AQS # 040191030 Site Description Site Name GREEN VALLEY AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191030 601 N. La Canada Drive, Green Valley, AZ 31.87952 / -110.996440 2910 Dirt, sparse desert vegetation This site is situated in a residential / commercial area. Open pit copper mines and tailings ponds are located four kilometers to the west of the community. 60 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E GREEN VALLEY PM 10 079 1 81102/1 NAAQS comparison / Provide air pollution data to the public in a timely matter Population Exposure Thermo Scientific TEOM 1400AB FEM PDEQ / PDEQ n/a Special Purpose Neighborhood 336 One exceedance on July 25, 2014. April 9, 2013 Continuous 4.25 meters above the ground of the Pima County Government Center. 360 1.63 meters n/a n/a 12.5 meters n/a n/a 100 meters west of La Canada with a 2010 ADT of 11,000 0.5 kilometers west of Interstate 19 with a 2011 ADT of 31,000 Yes Comments: This site is fifty kilometers south of Downtown Tucson in the retirement community of Green Valley. PM 10 monitoring commenced in September 1989 at the established TSP site there. ASARCO and Freeport-McMoRan operate several open pit mines and tailings ponds just west of the community. The monitoring objective is to monitor the population exposure to this potentially significant source of airborne particulates. The monitor was relocated in February 2001, approximately 1 kilometer north of the original Esperanza site, to the Pima County Government Center at 601 N. La Canada Drive. The new site is considered a continuation of the original site. PM 10 levels were below the health standards in the years 1989 through 2012. In 2013, there was one exceedance that may be considered as an Exceptional Event, dependent on approval from EPA. 61 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E GREEN VALLEY PM 2.5 733 1 88501/3 Provide air pollution data to the public in a timely matter / Population Exposure Population Exposure Met-One Beta Attenuation 1020 other PDEQ / PDEQ n/a Special Purpose Neighborhood 347 0 0 Continuous 4.8 meters above the ground on a shelter 360 2.03 meters n/a n/a 10.7 meters n/a n/a 100 meters west of La Canada with a 2010 ADT of 11,000 0.5 kilometers west of Interstate 19 with a 2011 ADT of 31,000 No Yes Comments: This site is fifty kilometers south of Downtown Tucson in the retirement community of Green Valley. This monitor was initially installed in May of 2000 as part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) program. Pima County began reporting the PM 2.5 data to EPA July, 2003. 62 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E GREEN VALLEY OZONE 047 1 44201/1 NAAQS comparison / Provide air pollution data to the public in a timely matter Population Exposure Thermo Scientific / 49c then 49i October 6, 2014 FEM PDEQ / PDEQ n/a Special Purpose Neighborhood 365 0 0 Continuous 3.1 meters above the ground on a shelter FEP Teflon / 7.95 seconds 360 0.81 meters n/a n/a 8.5 meters n/a n/a 100 meters west of La Canada with a 2010 ADT of 11,000 0.5 kilometers west of Interstate 19 with a 2011 ADT of 31,000 Yes Comments: This site is fifty kilometers south of Downtown Tucson in the retirement community of Green Valley. This site was initially established in April of 2002 as part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) program. Pima County began reporting the ozone data to EPA July, 2003. 63 2014 Ambient Air Monitoring Five Year Network Assessment and Plan CORONA de TUCSON: AQS # 040190008 Site Description Site Name CORONA de TUCSON AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040190008 22001 S. Houghton Road, Tucson, AZ 32.00474 / -110.79260 3078 Gravel within enclosure; dirt, sparse desert vegetation surrounding This site is situated in an undisturbed natural desert area. 64 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name CORONA de TUCSON Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer/Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E PM 10 126 1 81102/ 1 NAAQS comparison / Upwind Background Upwind Background R&P 2000 FRM PDEQ / PDEQ PDEQ SLAMS Regional 60 0 0 Every sixth day 2.08 meters 360 n/a n/a n/a 23.4 meters n/a n/a 1.6 kilometers west of Houghton Road with a 2010 ADT of 9,000. Yes Comments: This site is the only regional scale monitor in the network. PM 10 sampling was started here in September 1988, in conjunction with existing total suspended particulates (TSP) sampling. This site exhibits the lowest network concentrations. TSP sampling was discontinued in May 1989. Hi - Vol sampling for PM 10 was substituted with dichotomous sampling during the last quarter of 1989 in support of the state sponsored Tucson PM 10 Source Apportionment Study. Hi - Vol PM 10 sampling resumed in January 1990. Low -Vol PM 10 R& P 2000 sampling began in March, 2006. 65 2014 Ambient Air Monitoring Five Year Network Assessment and Plan ORANGE GROVE: AQS # 040190011 Site Description Site Name ORANGE GROVE AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040190011 3401 W. Orange Grove Road, Tucson, AZ 32.32255 / -111.037700 2234 Gravel in fenced compound, dirt road shoulders This site is situated in a residential area with light commerce and industry. There is an asphalt batch plant and redi-mix concrete operations with a large gravel pit less than three kilometers to the west of the site in the Santa Cruz River bed area. 66 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name ORANGE GROVE Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer/Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances PM 10 Primary 127 2 81102/ 2 NAAQS Comparison / Highest Concentration Current Sampling frequency / Season The sampling frequency started out with every other day sampling. It was changed to daily after the exceedance in July 1985. The sampling frequency remained as daily until the end of 1986. Every other day sampling was resumed until the two exceedances were recorded in the fourth quarter 1988. Every day sampling was immediately initiated and continued until April 1991 when every other day sampling was resumed. The site was placed on every sixth day sampling in October 1993. The exceedances of the NAAQS in 1999 commenced everyday sampling on September 9, 1999. Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT 2.2 meters above the ground in a city water well site 360 n/a Site meets 40 CFR 58, Appx. A,C,D,E Highest Concentration R&P 2025 Sequential FRM PDEQ /PDEQ PDEQ SLAMS Neighborhood 348 One exceedance on July 25, 2014 Exceedances of the 24 – hour standard: two in 1988, four in 1999, one in 2002, one in 2003, one in 2009 ; one in 2014 n/a n/a 19.2 meters n/a 1.2 meters /Every day ; reported every 6th day/ R& P 2025 Sequential 37 meters west of Camino de la Tierra with a 2010 ADT of 3000 and 70 meters south of Orange Grove Road with a 2010 ADT of 37,000 2 kilometers east of Interstate 10 with a 2012 ADT of 110,000 Yes 67 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Comments: Established in February 1985, this site is the oldest of the PM 10 monitoring sites in the network. Orange Grove was chosen as the initial PM 10 monitoring site and the design value site for Group II in the Tucson air planning area based on historically high TSP data. This neighborhood scale site is located near the confluence of the Santa Cruz, Rillito, and Canada del Oro Rivers in the Tucson Valley. This site is situated near the freeway and railway tracks, and in the vicinity of major construction projects, therefore high PM 10 values are expected here. Dichotomous sampling was started at this site in July of 1993. The dichotomous ran in co-location with a HI-VOL- SA/1200 model from 1993 to 1996. The site was converted to dichotomous only operations on October 1, 1996 continuing until December 1998. HiVol sampling resumed in January 1999, but was replaced with co-located low volume sequential samplers in 2004. 68 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name ORANGE GROVE Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer/Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT PM 10 Collocated 127 2 81102 (POC 4 as of March, 2014) Collocation information Site meets 40 CFR 58, Appx. A,C,D,E Highest Concentration R&P 2025 Sequential FRM PDEQ /PDEQ PDEQ SLAMS Neighborhood 350 One exceedance July 25, 2014 One in 2002; one in 2009; one in 2014 Every 6th day 2.2 meters above the ground in a city water well site 360 n/a n/a n/a 19.2 meters n/a 1.2 meters /Every day ; reported every 6th day/ R& P 2025 Sequential 37 meters west of Camino de la Tierra with a2010 ADT of 3000 and 70 meters south of Orange Grove Road with a 2010 ADT of 37,000 2 kilometers east of Interstate 10 with a 2012 ADT of 110,000 Yes 69 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E ORANGE GROVE PM 2.5 118 1 88101/ 1 NAAQS Comparison / Highest expected concentration Population Exposure R&P Partisol-Plus 2025 FRM PDEQ / PDEQ PDEQ SLAMS Neighborhood 120 0 0 Every three days sampling 2.1 meters above the ground in a city water well site 360 n/a n/a n/a 20.3 meters n/a n/a 37 meters west of Camino de la Tierra with a 2010 ADT of 3000 and 70 meters south of Orange Grove Road with a 2010 ADT of 37,000 2 kilometers east of Interstate 10 with a 2012 ADT of 110,000 Yes Yes Comments: PM 2.5 sampling began at this neighborhood scale site in January, 1999. It is located near the confluence of the Santa Cruz, Rillito and Canada del Oro Rivers in the Tucson Valley, toward the northwest end of the air planning area. The site is situated near a freeway and railroad tracks. 70 2014 Ambient Air Monitoring Five Year Network Assessment and Plan SOUTH TUCSON: AQS # 040191001 Site Description Site Name SOUTH TUCSON AQS ID Address Latitude / Longitude Elevation Surrounding landscape 040191001 1601 S. 6th Avenue, South Tucson, AZ 32.20195 / -110.967900 2420 Primarily paved parking lots; gravel and desert landscaping surrounding building. This site is situated in a dense residential / commercial area. There are numerous unpaved alleys and lots in the vicinity. Location description Comments: From January 1985 to September 1988 this site approached or exceeded TSP standards. PM 10 sampling began here in September 1988. On March 8, 1993, the samplers were relocated from the original site to the new South Tucson Governmental Complex, which is less than two blocks north and across S. 6th Avenue. Levels at this location are representative of area - wide emissions patterns with high population exposure. The annual means for 1989 through 1999 were below the health standard. The 24 hour NAAQS was exceeded twice in 1999 and 2002. Two co-located PM 10 samplers have been operational at this site from June 1991 to June 1999. Co-location of the PM 10 samplers was discontinued when a third sampler was added and everyday sampling began on June 23, 1999. In March, 2004, the Hi Vol samplers were replaced with co-located Low –Vol sequential samplers. 71 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E SOUTH TUCSON PM 10 Primary 127 2 81102 /1 NAAQS Comparison / Population Exposure Population Exposure R&P 2025 Sequential FRM PDEQ/ PDEQ PDEQ SLAMS Neighborhood 351 0 Exceedances of the 24 – hour standard: two in 1999; two in 2002; one in 2009; two in 2013 The exceedances of the NAAQS in 1999 commenced everyday sampling on June 23, 1999. 6.9 meters above the ground on the roof of the South Tucson Governmental Complex Building. 360 2.2 meters n/a n/a 6.7 meters n/a 1.7 meters/ Every day; reported every 6th day/ R&P 2025 Sequential 41 meters east of South 6th Avenue with a 2012 ADT of 15,000 528 meters south of 22nd Street with a 2012 ADT of 34,000 Yes 72 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E SOUTH TUCSON PM 10 Collocated 127 2 81102 (POC 2 as of March, 2014) Collocation sampling information Population Exposure R&P 2025 Sequential FRM PDEQ/ PDEQ PDEQ SLAMS Neighborhood 361 One exceedance: July 25, 2014 One in 1999; one in 2013; one in 2014 Every 6th day 6.9 meters above the ground on the roof of the South Tucson Governmental Complex Building. 360 2.2 meters n/a n/a 6.7 meters n/a 1.7 meters/ Every day; reported every 6th day/ R&P 2025 Sequential 41 meters east of South 6th Avenue with a 2012 ADT of 15,000 528 meters south of 22nd Street with a 2012 ADT of 34,000 Yes 73 2014 Ambient Air Monitoring Five Year Network Assessment and Plan PRINCE ROAD: AQS # 040191009 Site Description Site Name PRINCE ROAD AQS ID Address Latitude / Longitude Elevation Surrounding landscape 040191009 1016 W. Prince Road, Tucson, AZ 32.272300 / -110.989100 2315 Primarily paved parking lots, buildings and streets surrounding building. This site is situated in a dense residential / commercial area. Numerous unpaved alleys and lots are in the vicinity, from about 70 to 250 meters away from the sampler. Location description 74 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E PRINCE ROAD PM 10 126 1 81102/ 1 NAAQS Comparison / Source Impact Source Impact R&P 2000 FRM PDEQ / PDEQ PDEQ SLAMS Microscale 10 0 0 Every sixth day 4.6 meters above the ground on the roof of a small commercial building. 360 2.01 meters n/a n/a 19.8 meters n/a n/a 14.1 meters north of Prince Road with a 2010 ADT of 23,000 Yes Comments: This site is located in a homogenous, dense, residential / commercial area in north central Tucson. PM 10 sampling began here in August 1987. The microscale site is representative in the north central region of the air planning area where particulate levels are generally higher due to the low altitude and the prevailing southeasterly winds. The annual standard was exceeded in 1989. Power problems within the building resulted in an unusually low data recovery during the fourth quarter of 1990. Data recovery was again compromised by power problems in the 1st and 3rd quarters of 1997 and by damage to the sampler due to a storm in July, 2005. In March, 2006, the Hi -Vol sampler was replaced with a Low – Vol PM 10 R& P 2000 sampler. This site was discontinued March, 2014. 75 2014 Ambient Air Monitoring Five Year Network Assessment and Plan SANTA CLARA SCHOOL: AQS# 040191026 Site Description Site Name SANTA CLARA SCHOOL AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191026 6910 S. Santa Clara Avenue, Tucson, AZ 32.125950 / -110.982600 2540 Large flat roof, paved parking lots and streets, grass playground. This site is situated in a Southwest Tucson residential district. Comments: This site is located south of Interstate 10 and east of Interstate 19 and provides a representative neighborhood scale site on Tucson’s south side. Being near the fringe of the city limits, this site should track transport values that develop with a southerly wind from a combination of desert, agricultural land, and silt flood plain that is found on the Tohono O’Odham Indian Reservation (San Xavier district) 500 meters south of the site. The Hi- Vol sampler was replaced in April, 2006, with a Low- Vol sampler. 76 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E SANTA CLARA SCHOOL PM 10 126 1 81102 /1 NAAQS Comparison / Population Exposure Population Exposure R&P 2000 FRM PDEQ/ PDEQ PDEQ Special Purpose Neighborhood 59 0 Exceedances of the 24 – hour standard: One on 10/27/2008 Every sixth day 6.45 meters above the ground on the roof of the Santa Clara Elementary School. 360 2.01 meters (to roof) n/a n/a 23.9 meters n/a n/a 450 meters east of Interstate 19 with a 2012 ADT of 38,000 800 meters south of Valencia Road with a 2010 ADT of 53,000 Yes 77 2014 Ambient Air Monitoring Five Year Network Assessment and Plan TANGERINE: AQS # 040191018 Site Description Site Name TANGERINE AQS ID Address Latitude / Longitude Elevation Surrounding landscape 040191018 12101 N. Camino de Oeste, Tucson, AZ 32.425250 / -111.063500 2638 Dirt, sparse desert vegetation to the east; high density, tri –level multi – unit apartments directly west of station. This site has been situated in a relatively undisturbed natural desert area for most of it’s existence, but residential development in recent years have been built to within 35 meters to the west, and low density residential developments are encroaching from the south, east and north to within 3 kilometers to 5 kilometers. Location description . 78 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors / schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E TANGERINE PM 10 126 1 81102/ 1 NAAQS Comparison / General Background * General Background R&P 2000 FRM PDEQ/ PDEQ PDEQ Special Purpose Urban 61 0 0 Every sixth day 4.5 meters above the ground on a shelter on Tucson’s far northwest side 360 2.01 meters (to roof) n/a n/a 6.4 meters n/a n/a Tangerine Road runs approximately east – west 70 meters south of the site with a 2011 ADT of 5,000 Yes * See comment on page 3, PDEQ’s anticipated modifications to network in 2015 Comments: The primary objective of this site is to assess background concentrations and to assess transport impact from outlying sources during exceptional wind events. As part of the urban haze/ visibility study, dichotomous samplers were installed at this site in July 1993. PM 10 data from these samplers was used to supplement the existing PM 10 network from October 1996 to December 1998, when the dichotomous samplers were relocated and a Hi-Vol sampler was installed to continue PM 10 monitoring. In 2005, the Hi-Vol PM 10 sampler was replaced with a Low –Vol R& P 2000 sampler. 79 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E TANGERINE OZONE 047 1 44201 / 1 NAAQS comparison / Highest Concentration * Highest Concentration Thermo Scientific / 49c FEM PDEQ/ PDEQ n/a Special Purpose Urban 365 One exceedance on June 6, 2014 One in 2002; One in 2009; one in 2014 Continuous 3.75 meters above the ground on a shelter on Tucson’s far northwest side. FEP Teflon / 8.5 seconds 360 1.24 meters n/a n/a 8.3 meters n/a n/a Tangerine Road runs approximately east – west 70 meters south of the site with a 2011 ADT of 5,000 Yes * See comment on page 3, PDEQ’s anticipated modifications to network in 2015 Comments: Tangerine was established in November 1989. Ozone concentrations at this site have been the highest in the network on occasion. This may be due to the prevailing southeasterly winds transporting ozone from the urban area. Concentrations remain high well into the night and early morning. 80 2014 Ambient Air Monitoring Five Year Network Assessment and Plan GERONIMO: AQS # 040191113 Site Description Site Name GERONIMO AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191113 2498 N. Geronimo Tucson, AZ 32.251840 / -110.965300 2398 Dirt, dead shrubs, unpaved road shoulders This site is situated in a residential area in a City of Tucson water well site. 81 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E GERONIMO PM 10 122 1 81102 / 1 NAAQS Comparison / Provide air pollution data to the public in a timely matter Population Exposure Met One BAM 1020 FEM PDEQ / PDEQ n/a Special Purpose Neighborhood 354 One exceedance July 25, 2014 One on 7/22/2009; one on 04/09/2013; one on 07/25/2014 Every day; Hourly 4.6m 360 1.83 meters n/a n/a 9.3 meters n/a n/a 154.8 meters north of Grant Road with a 2012 ADT 32,000 617.6 meters east of Stone Avenue with a 2012 ADT 21,000 397.5 meters west of North 1st Avenue with a 2011 ADT 34,000 Yes Comments: This monitor was initially installed in July 1, 2007 for Air Quality Index reporting using a continuous monitor. This is a Special Purpose site situated in a residential area, monitoring for population exposure. There was one exceedance on April 9, 2013 that may be considered as an Exceptional Event dependant on approval from EPA. 82 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E GERONIMO PM 2.5 733 1 88501 /3 Provide air pollution data to the public in a timely matter / Population Exposure Population Exposure Met-One Beta Attenuation 1020 other PDEQ/ PDEQ n/a Special Purpose Neighborhood 343 0 0 Continuous 4.6 meters 360 1.98 meters n/a n/a 9.4 meters n/a n/a 154.8 meters north of Grant Road with a 2012 ADT 32,000 617.6 meters east of Stone Avenue with a 2012 ADT 21,000 397.5 meters west of North 1st Avenue with a 2011 ADT 34,000 No Yes Comments: This monitor was initially installed in July of 2001 for Air Quality Index reporting using a continuous monitor. Pima County began reporting the PM 2.5 data to EPA July, 2003. This is a Special Purpose site situated in a residential area, monitoring for population exposure. 83 2014 Ambient Air Monitoring Five Year Network Assessment and Plan ROSE ELEMENTARY: AQS # 040191032 Site Description Site Name ROSE ELEMENTARY AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191032 710 W. Michigan, Tucson, AZ 32.173 / -110.980115 2438 Grass playground The site is located in a residential neighborhood with light commercial enterprises. The Santa Cruz River, with several sand and gravel operations, parallels the interstate one kilometer to the west. 84 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E ROSE ELEMENTARY PM 2.5 733 1 88501 /3 Provide air pollution data to the public in a timely matter / Population Exposure Population Exposure Met-One Beta Attenuation 1020 other PDEQ / PDEQ n/a Special Purpose Neighborhood 336 0 0 Continuous 4.9 meters above the ground on the roof of a shelter located on the grounds of Rose Elementary School 360 2.39 meters n/a n/a 11.8 meters n/a n/a 12th Avenue 235 meters to the east with a 2011 ADT of 22,000 Ajo Way 528 meters to the north with a 2012 ADT of 28, 000 Interstate 19 runs north-south half a kilometer to the west with a 2012 ADT 80,000 No Yes Comments: This monitor was initially installed in October of 2000 as part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) program. This area was identified as having higher than normal number of pediatric asthma cases. Pima County began reporting the PM 2.5 data to EPA July, 2003. 85 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name ROSE ELEMENTARY Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height OZONE Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 047 1 44201/ 1 NAAQS comparison / Provide air pollution data to the public in a timely matter Population Exposure Thermo Scientific / 49i FEM PDEQ/PDEQ n/a Special Purpose Neighborhood 365 0 0 Continuous 4.1 meters above the ground on the roof of a shelter located on the grounds of Rose Elementary School. FEP Teflon / 9.5 seconds 360 1.63 meters n/a n/a 9.4 meters n/a n/a 12th Avenue 235 meters to the east with a 2011 ADT of 22,000 Ajo Way 528 meters to the north with a 2012 ADT of 28, 000 Interstate 19 runs north-south half a kilometer to the west with a 2012 ADT 80,000 Yes Comments: This site was initially established in October of 2000 as part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) program. This area was identified as having higher than normal number of pediatric asthma cases. Pima County began reporting the ozone data to EPA July, 2003. 86 2014 Ambient Air Monitoring Five Year Network Assessment and Plan COACHLINE: AQS # 040191034 Site Description Site Name COACHLINE AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191034 9597 N. Coachline, Tucson, AZ 32.380820 / -111.127160 2104 Dirt within walled compound, residential neighborhood The site is situated in a residential neighborhood. The normally dry Santa Cruz River runs northwest between the Interstate and the neighborhood and contributes to airborne dust through previous deposition of fine clay soils throughout the floodplain. This area has previously been used for farming and ranching, and sand and gravel operations are still in operation five to ten kilometers upstream to the southwest. 87 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 24-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Suitable for comparison to PM 2.5 NAAQS Site meets 40 CFR 58, Appx. A,C,D,E COACHLINE PM 2.5 733 1 88501/ 3 Provide air pollution data to the public in a timely matter / Population Exposure Population Exposure Met-One Beta Attenuation 1020 Other PDEQ / PDEQ n/a Special Purpose Neighborhood 351 0 0 Continuous 4.9 meters above the ground on a shelter on Tucson’s far northwest side 270, from 260 to 170, includes predominant wind direction from 135 (SE) 2.39 meters n/a 9.41 meters 5.0 meters n/a n/a approximately 1.25 kilometers west of Interstate 10 with a 2012 ADT of 77,000 .5 kilometer north of Silverbell Road 2010 ADT of 26,000 No Yes Comments: This monitor was initially installed in March of 2001 as part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) program. This area was identified as having higher than normal number of pediatric asthma cases. Pima County began reporting the PM 2.5 data to EPA July, 2003. 88 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer/Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E COACHLINE OZONE 047 1 44201 / 1 NAAQS comparison / Provide air pollution data to the public in a timely matter Population Exposure Thermo Scientific / 49i FEM PDEQ / PDEQ n/a Special Purpose Neighborhood 365 0 0 Continuous 3.1 meters above the ground on a shelter on Tucson’s far northwest side FEP Teflon / 9.3 seconds 290, from 250 to 170, includes predominant wind direction from 135 (SE) 0.91 meters n/a n/a 5.3 meters n/a n/a approximately 1.25 kilometers west of Interstate 10 with a 2012 ADT of 77,000 .5 kilometer north of Silverbell Road 2010 ADT of 26,000 Yes Comments: This site was initially established in April of 2001 as part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) program. This area was identified as having higher than normal number of pediatric asthma cases. Pima County began reporting the ozone data to EPA July, 2003. 89 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 22ND STREET & CRAYCROFT: AQS # 040191011 Site Description ND Site Name 22 STREET & CRAYCROFT AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191011/ 1 1237 S. Beverly Avenue, Tucson, AZ 32.204420 / -110.878067 2582 Dirt, ephemeral weeds This site is situated in a predominately residential eastside area with commercial activity lining nearby arterial routes. There is a large covered water reservoir north of the location. 90 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of hourly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 22ND STREET & CRAYCROFT CARBON MONOXIDE 158 1 42101 /1 NAAQS comparison / Population Exposure Population Exposure Horiba / APMA370 FRM PDEQ / PDEQ n/a SLAMS Neighborhood 8467 0 0 Continuous 4.1 meters above the ground on the roof of a shelter located in a city water well site. FEP Teflon / 5.3 seconds 360 0.91meters n/a n/a 22.0 meters n/a n/a 260 meters west is Craycroft Road with a 2012 ADT of 34,000 260 meters north is 22nd Street with a 2012 ADT of 48,000 Yes Comments: This site is one of the oldest in the monitoring network, originally established in 1973, and has operated continuously to the present. 91 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 22ND STREET & CRAYCROFT OZONE 047 1 44201 /1 NAAQS comparison / Maintenance of long term monitoring at this location Population Exposure Thermo Scientific / 49i FEM PDEQ / PDEQ n/a SLAMS Neighborhood 365 0 One in 1997, 1999, 2002, 2011 Continuous 4.1 meters above the ground on the roof of a shelter located in a city water well site. FEP Teflon / 8.1 seconds 360 0.91meters n/a n/a 22.0 meters n/a n/a 260 meters west is Craycroft Road with a 2012 ADT of 34,000 260 meters north is 22nd Street with a 2012 ADT of 48,000 Yes Comments: This site is one of the oldest in the monitoring network, originally established in 1973, and operated continuously to the present. 92 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of hourly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 22ND STREET & CRAYCROFT NITROGEN DIOXIDE 157 1 42602 /1 NAAQS comparison / Maintenance of long term monitoring at this location Population Exposure Horiba / APNA -370 FRM PDEQ / PDEQ n/a SLAMS Neighborhood 8658 0 0 Continuous 4.1 meters above the ground on the roof of a shelter located in a city water well site FEP Teflon / 7.5 seconds 360 0.91meters n/a n/a 22.0 meters n/a n/a 260 meters west is Craycroft Road with a 2012 ADT of 34,000 260 meters north is 22nd Street with a 2012 ADT of 48,000 Yes Comments: This site is one of the oldest in the monitoring network, originally established in 1973, and operated continuously to the present. 93 2014 Ambient Air Monitoring Five Year Network Assessment and Plan 22ND STREET & ALVERNON: AQS # 040191014 Site Description ND Site Name 22 STREET & ALVERNON AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191014 3895 E. 22nd Street, Tucson, AZ 32.207390 / -110.910650 2516 Gravel in walled compound, paved streets and sidewalks This site is situated in a commercial area near a high traffic count intersection. A large regional park is located to the northwest of the site. 94 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of hourly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type 22ND STREET & ALVERNON CARBON MONOXIDE 174 1 42101 / 1 NAAQS comparison / Highest Concentration Highest Concentration Ecotech / Serinus 30 FRM PDEQ / PDEQ n/a SLAMS Microscale 8430 0 Years: 1975 - 1986 and 1988 Continuous 3.4 meters above the ground attached to a wall near 22nd Street at a Tucson Water well site FEP Teflon / 24.4 seconds 360, includes predominant wind direction from 135 (SE; directly from intersection of 22nd St. and Alvernon Way). .4 meters n/a 2.0 meters 10.7 meters n/a n/a Nearest roads distance & direction to monitor / ADT 60 meters west of Alvernon Way with a 2012 ADT of 31,000 Site meets 40 CFR 58, Appx. A,C,D,E Yes 10 meters north of 22nd Street with a 2012 ADT of 43,000 Comments: The site was relocated in October, 2001 to a Tucson Water well site 50 meters west of the original location. The move was necessitated by an intersection improvement project and anticipated construction on the northwest corner. The shelter was moved again in January, 2004, to a different corner within the well site, and the probe was attached to a wall in virtually the same location as before the shelter was moved, so airflow from the intersection would remain unrestricted. 22nd & Alvernon continues to measure the highest CO concentrations in the network. The prevailing morning- hour southeasterly winds usually disperse CO generated in the intersection. During stagnant conditions, especially during the winter inversion formation, CO generated in the intersection has a longer residence time. Although population exposure is limited at this location, 22nd & Alvernon is representative of worstcase intersections in Tucson. This site has been operating continuously since 1975. No exceedances of the eight-hour health standard were recorded in 1989 through 2014. 95 2014 Ambient Air Monitoring Five Year Network Assessment and Plan CHERRY & GLENN: AQS # 040191021 Site Description Site Name CHERRY & GLENN AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191021 2745 N. Cherry Avenue, Tucson, AZ 32.25658 / -110.948650 2400 Gravel in fenced compound, paved parking lot, streets This site is located in a predominately residential neighborhood, approximately 0.8 km northwest of a high traffic count intersection. Directly south and west of the site is a private High School enrolling approximately 1200 students. 96 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of hourly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E CHERRY & GLENN CARBON MONOXIDE 054 1 42101 /1 NAAQS comparison / Population Exposure Population Exposure Thermo Scientific / 48c FRM PDEQ/ PDEQ n/a Special Purpose Neighborhood 4342 0 0 Continuous / Seasonal monitor operation from Jan 1- March 31 and Oct.1 – Dec. 31 4.9 meters above the ground on a shelter in a city water well site. FEP Teflon / 5.47 seconds 360 0.91meters n/a n/a 8.7 meters n/a n/a 0.8 kilometers north of Grant Road with a 2012 ADT of 43,000 0.5 kilometers west of Campbell Avenue with a 2012 ADT of 33,000. Yes Comments: Cherry & Glenn was established as a special purpose site in February 1989, in order to assess the CO levels at a distance (less than 1 kilometer) from a typical high-volume intersection. This site has historically recorded very low levels of CO during the summer months. Consequently, in 2001, seasonal monitoring began with sampling from October through March. 97 2014 Ambient Air Monitoring Five Year Network Assessment and Plan GOLF LINKS & KOLB: AQS # 040191031 Site Description Site Name GOLF LINKS & KOLB AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191031 2601 South Kolb Road 32.191180 / -110.840550 2692 Dirt lot and easement, paved street This site is located near the southeast corner of Golf Links and Kolb roads in a City of Tucson water reservoir site. Light commercial enterprises occupy all four corners and separate the intersection from residential neighborhoods. 98 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of hourly observations Number / Dates of standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT GOLF LINKS & KOLB CARBON MONOXIDE 093 1 42101 / 1 NAAQS comparison / Highest Concentration Highest Concentration Thermo Scientific / 48c FRM PDEQ/ PDEQ n/a Special Purpose Microscale 4248 0 0 Continuous / Seasonal Monitor operating Jan. 1- March 31 and Oct. 1 – Dec. 31 3.0 meters above the ground on a pole located next to Kolb road FEP Teflon / 28.96 seconds 360 n/a n/a n/a 2.7 meters n/a n/a 100 meters south of Golf Links, with a 2012 ADT of 39,000 2 meters east of Kolb Road, with a 2009 ADT of 47,000. Site meets 40 CFR 58, Appx. A,C,D,E Yes Comments: Golf Links & Kolb was established as a special purpose site in September 2002, as part of the Carbon Monoxide Limited Maintenance Plan. Inlet placement qualifies it as a microscale site, and sighting it on the southeastern quarter of the intersection provides an opposite wind direction compliment to the 22/Alvernon site. This site is operated seasonally, from October through March. 99 2014 Ambient Air Monitoring Five Year Network Assessment and Plan SAGUARO PARK EAST: AQS # 040190021 Site Description Site Name SAGUARO PARK EAST AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040190021 3905 South Old Spanish Trail, Tucson, AZ 32.174538 / -110.737116 3089 Natural desert This site is situated in the National Park. The nearby light residential area has no significant local sources of ozone precursors. 100 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name SAGUARO PARK EAST Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height OZONE Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E 047 1 44201 /1 NAAQS comparison / Highest Concentration Highest Concentration Thermo Scientific / 48c FEM PDEQ/ PDEQ n/a SLAMS Neighborhood 365 One exceedance on June 6, 2014 one in 1999, 2003, 2005, 2008; three in 2011; one in 2014 Continuous 4.1 meters above the ground in Saguaro National Park East on the roof of a shelter that is one kilometer south of the administration building. FEP Teflon / 6.58 seconds 360 1.22 meters n/a n/a – (trailer was removed) 8.0 meters n/a n/a 80 meters east to Old Spanish Trail with a 2012 ADT of 7,000 105 meters south of Escalante with a 2011 ADT of 3,000 Yes Comments: The Saguaro National Park site has been active since 1982. The operation of the site was taken over by the National Park Service in 1987. The Park Service returned operation of the site to Pima County in 1993. Geographically, Saguaro National Park is on the eastern edge of the Tucson metropolitan area. Ozone data from this site has been used to study how the levels of ozone affect natural vegetation. 101 2014 Ambient Air Monitoring Five Year Network Assessment and Plan FAIRGROUNDS: AQS # 040191020 Site Description Site Name FAIRGROUNDS AQS ID Address Latitude / Longitude Elevation Surrounding landscape Location description 040191020 11330 S. Houghton Road, Tucson, AZ 32.047680 / -110.774350 3078 Natural desert vegetation on lag gravel This site is situated in an undisturbed natural desert area to the north and east. The Pima County Fairgrounds and drag strip are located directly southwest of the site. 102 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Monitoring Information Site Name Pollutant Method code Number of monitors Parameter code / POC Basic monitoring objective / Statement of purpose Site type Instrument Manufacturer / Model FRM/FEM/ARM/other Collecting agency / Reporting agency Analytical lab Monitor type Scale Number of daily observations Number / Dates of 8-hour standard exceedances in 2014 Historical exceedances Current Sampling frequency / Season Probe height Probe material / Residence time Degrees of unrestricted air flow Distance from supporting structure Distance from obstruction on roof Distance from obstruction not on roof Distance from trees Distance to furnace or incinerator flue Distance between collocated monitors/ Schedule / Collocated monitor type Nearest roads distance & direction to monitor / ADT Site meets 40 CFR 58, Appx. A,C,D,E FAIRGROUNDS OZONE 047 1 44201 / 1 NAAQS comparison / Background Background Thermo Scientific / 49i FEM PDEQ/ PDEQ n/a Special Purpose Urban 365 0 One in 2008 and 2011 Continuous 3.6 meters above the ground on a shelter on Tucson’s far southeast side FEP Teflon / 8.64 seconds 360 1.22 meters n/a n/a n/a n/a n/a 53 meters west of Houghton road with a 2010 ADT of 9,000 Yes Comments: Fairgrounds was established in October 1989. Ozone concentrations at this site have been the highest in the network on occasion. This may be due to the afternoon wind shift that takes place almost daily in the Tucson basin. The wind may be transporting urban ozone precursors or stable ozone to the far east end of the Tucson air planning area. 103 2014 Ambient Air Monitoring Five Year Network Assessment and Plan VI. TECHNOLOGY Monitor Status for the Pima County Network Gas Monitors, standard NAAQS: During the five year period since the last Network Assessment, significant progress has been made toward instrument replacement, with emphasis placed on the pollutants of greatest concern. All ozone monitors in the network are Thermo I series units, and most have been purchased within the past two years. CO and NOx at NAAQS stations are Horiba 370 series, and these have been in operation for four years, with absolutely perfect performance. All replacement monitors purchased are trace level for CO, NOx and SO 2 to conform to current CFR requirements for routine verification concentration levels. Gas Monitors, trace level: Trace level monitors installed in the PDEQ NCore site are I series Thermo units and have operated adequately with no significant problems since deployment in mid-2009. The only monitor that has been replaced is the CO monitor, and the original unit is being operated at the 22/Alvernon station, operated on a 0 to 5 ppm scale for improved resolution at the low CO levels typically recorded in the network. An Ecotech trace NOx monitor was added to the NCore station in June, 2011, replacing the ancient, but still functional API unit. Particulate Monitors, filter based: All filter-based particulate monitors are R&P 2000 FRM or 2025 sequential units ranging in age from approximately two months to twelve years. The 2000 FRM units have provided excellent service with minimal difficulties. The 2025 sequential units have been more problematic due to the nature of the filter exchange system and associated pneumatics. PDEQ operates four of these samplers on an every-day schedule, and this has accelerated wear and tear on those units from both a normal operation perspective as well as increased maintenance. The operation and service manuals provided with R&P samplers are superior, partly because of the troubleshooting flowcharts included. Factory support has been less helpful since the acquisition of the R&P product line by Thermo Fisher Scientific and the move of manufacturing operations to Franklin, MA. Recent acquisitions of Thermo Partisol Plus 2025 I series replacement samplers has proven interesting, if not truly encouraging. The I series platform does away with many of the manual features perfected in the previous series, instead relying on electronic interface for programming. This has produced some operational bugs that complicate the operation of the sampler, and may result in lost samples due to operator error through unforgiving complexity. PDEQ does not see this as an improvement in the sampler, but have limited experience with the new platform at this time, and may come to accept the changes as operators become more familiar with the system. 104 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Particulate Monitors, continuous: Continuous particulate monitors are Met One BAM 1020 with BGI Sharp Cut Cyclones or Very Sharp Cut Cyclones for PM 2.5 and both BAM 1020 and Thermo Fisher RP TEOM 1400ab units for PM 10 . This division of instrument and particle size is based on better performance with the BAM 1020 in the lower PM 2.5 concentration ranges with the improvements made to qualify the instrument as an FEM, as opposed to the TEOM and the complex, expensive and user-unfriendly FDMS system adapted to the TEOM platform to provide adequate low-concentration PM 2.5 performance. Calibration Equipment and Method: Calibration, gas dilution: Thermo Environmental/Fisher Scientific dynamic gas calibrators are used network-wide for all dilution calibrations. New I series units were purchased in 2014 for the Children’s Park NCore station, and the original I series units are being used to replace the older C series units for NAAQS sites. PDEQ has not experienced significant difficulty with any of these units but do not use them for ozone calibrations, and none are equipped with photometers. All are equipped for GPT and have performed well at NAAQS levels; less well for trace DIF (NO 2 ) levels in the lower concentration ranges. The addition of photometers to the trace units may improve low-end performance, but based on disastrous performance in the past with Thermo ozone calibrators, PDEQ is reluctant to consider this change. These calibrators are capable of remote operation. As funding becomes available and trace level analyzers are brought on line to conform to current CFR requirements and pollutant concentration levels, gas dilution calibrators and zero air generators will be purchased to provide the lower calibration and routine check concentrations that these analyzers are capable of measuring. PDEQ air monitoring staff have been consulting with a local manufacturer of mass flow controllers and flow meters, exploring the possibility of streamlining our mass flow controller calibrations and verifications in dynamic gas calibrators, which has traditionally been an exceedingly tedious timeconsuming task using soap bubble meters to verify flows. The flow meters produced by Alicat Scientific use pressure differential flow measurement through a laminar flow element, and initial impressions are very positive. It is PDEQ’s intention to make the switch to these flow meters for all mass flow calibrations, which can do the same job as a soap bubble meter, in a fraction of the time, with greater accuracy. Calibration, ozone: All ozone calibration is done using API model 703E and 703T units, all purchased within the past two years. An API 703T is used as a primary standard, verified annually by California ARB. All field standards are calibrated using the primary standard and a dedicated Thermo 49i master standard. The field standards are transported from site to site on a weekly basis for calibrations, precision, zero and span checks. Since no in situ calibrators are used in the PDEQ ozone network, the transportability factor becomes an issue, and to date API is the only major manufacturer to accommodate those agencies that routinely transport their field standards. 105 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Zero Air Source: All zero air sources used in the PDEQ network in conjunction with dilution calibration are compressor based with various configurations of catalyst and desiccant. API Model 701 units are used at NAQQS stations. The NCore station uses a Thermo Model 111 that has been modified with a desiccant chamber between the compressor/tank and the scrubber unit, and a final carbon output scrubber. All zero air is filtered upstream of gas calibrator zero air inlets to prevent mass flow controller contamination. Ozone field standards use activated carbon and desiccant canister portable scrubbers. Gas Standards: All gas standards are certified EPA Protocol grade produced by both Airgas in Los Angeles, and Matheson Tri-Gas. As the cylinder contents of the Airgas products depletes, replacement standards will be provided by Matheson Tri-Gas to comply with the current County contract. This transition has not produced any problems, and the products provided by Matheson Tri-Gas have proven to have accurate concentrations. Gas standards used for NCore monitoring are lower concentrations suitable for trace-level dilutions. Meteorological Calibration Devices: PDEQ uses sonic anemometers network-wide. Field calibrations are not possible with this type of unit. The units are initially factory calibrated in a closed-loop wind tunnel and provided with calibration documentation. The only field verification possible is with a second co-located unit with recent factory calibration, and static verification by transducer blocking and bagging. Anemometer alignment is performed with a quality compass adjusted annually to the current magnetic declination in Tucson. Temperature and relative humidity sensors are calibrated using a Vaisala HMK15 calibration kit with certified salt solutions and a NIST traceable thermometer. Sampling Manifold: PDEQ does not use sampling manifolds. Sample inlets are FEP teflon tubing installed as short as possible to minimize sample residence time, which is typically less than ten seconds. Inlet tubing is changed routinely to eliminate sample degradation from contamination in the tubing. The NCore station is set up so that all calibration, routine check and audit gases are routed to the probe and are then exposed to the same inlet conditions as the sample air. Shelter Temperature: Vaisala HPM45 temperature / RH sensors are installed in all stations to monitor shelter temperature, and relative humidity at BAM stations to facilitate calibration of the RH sensors in the BAMs. The sensor heads are calibrated annually using a Vaisala HMK15 calibration kit with certified salt solutions and a NIST traceable thermometer. 106 2014 Ambient Air Monitoring Five Year Network Assessment and Plan Auditing Equipment: PDEQ uses dedicated audit equipment and gas standards for all internal audits. The audit gas calibrator used on all NAAQS monitors is an Environics Model 6103 that is new. The NCore station has a dedicated Thermo Scientific Model 146i installed next to the identical site calibrator. Both the audit and site calibrator are plumbed identically using different gas standards of the same concentrations in two segregated racks. Meteorological audit equipment consists of a dedicated Vaisala HMK15 calibration kit with certified salt solutions and a NIST traceable thermometer for relative humidity and temperature probe audits. Sonic anemometer verifications are done using a co-located sonic anemometer, and transducer blocking and bagging for signal verification. Anemometer alignment verification is performed with a quality compass adjusted annually to the current magnetic declination in Tucson. Data Acquisition System: Most NAAQS stations use ESC Model 8816 data loggers configured for analog input signals, and basic fax modems polled through standard telephone lines. This system has been adequate for some time, but will require upgrading to digital-ready loggers as trace-level analyzers are brought on line. The Children’s Park NCore station and the 22/Alvernon CO station have DR DAS Envidas loggers configured for digital inputs from all trace analyzers and analog inputs from meteorological sensors. These loggers are capable of metadata collection and storage, remote diagnostics and either programmed or remote operation. Both loggers are polled through wireless routers. Automated central polling, data analysis and reporting is done using an Envitech / DR DAS data acquisition suite. 107