### Clark County, Nevada: Annual Monitoring Network Plan Report



# Annual Monitoring Network Plan Report

June 2014

Clark County Department of Air Quality 4701 W. Russell Road, Suite 200 Las Vegas, Nevada 89118

### Clark County, Nevada: Annual Monitoring Network Plan Report

ii 

# Executive Summary

This document reports the status of the Clark County air monitoring network in 2013, as required by Title 40, Part 58 of the Code of Federal Regulations. It describes network operation in 2013, changes planned for 2014–2015, and the ways in which Clark County disseminates network data to the public in a timely manner.

### Clark County, Nevada: Annual Monitoring Network Plan Report

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## TABLE OF CONTENTS Section 1: Introduction .................................................................................................................. ...........1 Section 2: Minimum Monitoring Requirements ......................................................................................2 2.1 Ozone ......................................................................................................................... .2 2.2 PM 2.5 

## ...........................................................................................................................2 2.3 PM 10 

## ............................................................................................................................3 2.4 NO 2 

## .............................................................................................................................3 2.5 SO 2 

## .............................................................................................................................. 3 2.6 CO ............................................................................................................................ ...4 2.7 Pb ............................................................................................................................ ....4 Section 3: Collocated Monitors as of 2014 ..............................................................................................5 Section 4: 2013 Site Tables .............................................................................................................. ........6 Section 5: Maps of Criteria Pollutant Monitoring Stations in 2013 ......................................................36 Section 6: National Performance Audit and Performance Evaluation Programs ..................................43 Section 7: Network Modifications ......................................................................................................... 44 7.1 Completed Changes ..................................................................................................44 7.2 Proposed Changes .....................................................................................................44 7.3 Review Process for Network Modifications .............................................................54 7.4 Near-road Monitoring ...............................................................................................54 7.5 Special Purpose Studies ............................................................................................55 7.6 Future Needs .............................................................................................................55 Appendix A: Near-road Site 1 .................................................................................................. ......... A-1 Appendix B: Near-road Site 2 .................................................................................................. ..........B-1 Appendix C: Site Ranking Documentation ........................................................................................ C-1 Appendix D: EPA Approvals/Disapprovals and Technical Support Document ............................... D-1 Appendix E: Nevada Census and NDOT Analyses ........................................................................... E-1

LIST OF FIGURES Figure 1: Apex. ......................................................................................................................... ..6 Figure 2: Boulder City. ...............................................................................................................8 Figure 3: Green Valley. ............................................................................................................10 Figure 4: J.D. Smith..................................................................................................................12 Figure 5: Jean. ......................................................................................................................... .15 Figure 7: Jerome Mack. ............................................................................................................17 Figure 8: Joe Neal. ........................................................................................................... .........21 Figure 9: Mesquite. ........................................................................................................... ........23 Figure 10: Palo Verde. ........................................................................................................ ........25 Figure 11: Paul Meyer. ........................................................................................................ .......27 Figure 12: Sunrise Acres. ..................................................................................................... ......29 Figure 13: Walter Johnson...................................................................................................... ....32 Figure 14: Winterwood...............................................................................................................34 Figure 15: CO Monitors. ............................................................................................................36 Figure 16: O 3 

## Monitors. ..............................................................................................................36 Figure 17: NO x 

## Monitors. ...........................................................................................................38 Figure 18: SO 2 

## Monitors. ...........................................................................................................39 Figure 19: Continuous PM 10 

## Monitors. ......................................................................................40

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## Figure 20: Continuous PM 2.5 

## Monitors. .....................................................................................41 Figure 21: Filter-Based PM 2.5 

## Sampler. .....................................................................................42 Figure 22: Indian Springs (Proposed SPM Site). .......................................................................45 Figure 23: Logandale (Proposed SPM Site). ..............................................................................47 Figure 24: Spring Mountain Youth Camp (Proposed SPM Site). ..............................................49 Figure 25: Near-Road Site 1. .................................................................................................. ....51 Figure 26: Near-Road Site 2. .................................................................................................. ....53

LIST OF TABLES Table 1. Minimum Monitoring Requirements for Ozone .........................................................2 Table 2. Minimum Monitoring Requirements for PM 2.5 

## ..........................................................2 Table 3. Minimum Monitoring Requirements for PM 10 

## ...........................................................3 Table 4. Minimum Monitoring Requirements for NO 2 

## ............................................................3 Table 5. Minimum Monitoring Requirements for SO 2 

## .............................................................3 Table 6. Minimum Monitoring Requirements for CO ..............................................................4 Table 7. Minimum Monitoring Requirements for Pb at NCore ................................................4 Table 8. Filter-Based PM 2.5 

## FRM Network ..............................................................................5 Table 9. Continuous PM 2.5 

## FEM Network ................................................................................5 Table 10. 2013 NPAP and TTP Evaluations .............................................................................43 Table 11. 2013 PEP Audit Activity ..........................................................................................43 Table 12. Summary of 2013 Network Modifications ...............................................................44 Table 13. Proposed Site and Equipment Changes, 2014–2015 ................................................44

ACRONYMS AADT annual average daily traffic AQS Air Quality System CBSA Core-Based Statistical Area CFR Code of Federal Regulations DAQ Clark County Department of Air Quality EPA U.S. Environmental Protection Agency FEM federal equivalent method FRM federal reference method MSA Metropolitan Statistical Area NAAQS National Ambient Air Quality Standards NPAP National Performance Audit Program PEP Performance Evaluation Program POC parameter occurrence code SPM Special Purpose Monitoring SLAMS State/Local Air Monitoring System TTP through-the-probe

### Clark County, Nevada: Annual Monitoring Network Plan Report

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# Section 1: Introduction
This report serves as a review of the current Clark County Department of Air Quality (DAQ) ambient airmonitoring network and a plan for future network activities. During 2013, the following conditions existed:

1. DAQ operated monitoring instruments to measure ambient concentrations of continuous and filter-based particulate matter (PM) 2.5 

## , continuous PM 10 

## , ozone (O 3 

## ), carbon monoxide (CO), nitrogen oxides (NO, NO 2 

## , NO x 

## , NO y 

## ), sulfur dioxide (SO 2 

## ), and lead (Pb).

2. DAQ operated under a quality-assured system.

3. DAQ operated visibility instrumentation at North Las Vegas Airport and the Sunset Elemental Carbon/Organic Carbon monitor at the Jerome Mack monitoring station as a special project. DAQ also commissioned a study at Angel Peak using lidar technology.
Criteria air pollutants are a group of six common air pollutants regulated by the U.S. Environmental Protection Agency (EPA), which developed National Ambient Air Quality Standards (NAAQS) for these pollutants to protect public health and the environment. The six criteria pollutants are O 3 

## , PM 2.5 

## /PM 10 

## , CO, NO 2 

## , SO 2 

## , and Pb. DAQ submits all criteria pollutant data, including precision and accuracy data, to the AQS database quarterly.
Currently, Clark County is designated as “in attainment” for the O 3 

## , PM 2.5, 

## CO, and NO 2 

## NAAQS and “unclassifiable” for SO 2 

## and Pb. The Las Vegas Valley (Hydrographic Area 212) within Clark County is classified as a “serious nonattainment area” for PM 10 

## . The area had attained the PM 10 

## standard as of December 31, 2006, and EPA issued a “Finding of Attainment” in August 2010. However, the area cannot be formally redesignated as “in attainment” until EPA approves the Request for Redesignation and Maintenance Plan for PM 10 

## , submitted by DAQ in August 2012. EPA action on the request is pending.
DAQ submitted the 2013 annual data certification to EPA on April 30, 2013. It is anticipated that the 2014 annual data certification will be submitted in April 2014.
Air quality data is disseminated to the public in a timely manner via the DAQ website and EPA’s Airnow database. DAQ also provides customized data reports upon request.Clark County, Nevada:Annual Monitoring Network Plan ReportPage | 2Section 2: Minimum Monitoring RequirementsThe tables below show that the Clark County air quality network meets or exceeds the 2013 minimum requirements of Title 40, Part 58 of theCode of Federal Regulations (40 CFR 58).2.1 OzoneTable 1. Minimum Monitoring Requirements for OzoneMSA1CountyPopulation &Census Year8-hr Design Value[ppb], DV Years2Design Value site(name, AQS ID3)# RequiredMonitors#ActiveMonitors# Add’l MonitorsNeededLas Vegas-Paradise(29820)Clark, NV 2,000,759 (2012) 77, 2011-13Joe Neal(32-003-0075)2 11 01Metropolitan Statistical Area.2DV Years = the three years over which the design value was calculated (e.g., 2011-2013).3Air Quality System (site) Identification.Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.2.2 PM2.5Table 2. Minimum Monitoring Requirements for PM2.5MSA CountyPop. &Census YrAnnual DesignValue [ȝg/m3],DV Years1Annual DesignValue Site (name,AQS ID)Daily DesignValue [ȝg/m3],DV yearsDaily Design Val-ue Site (name,AQS ID)# RequiredSLAMSMonitors# ActiveSLAMSMonitors#Add’l SLAMSMonitors Need-edLas VegasParadise(29820)Clark,NV2,000,759(2012)8.8, 2011-13Sunrise Acres(32-003-0561)23, 2011-13Sunrise Acres(32-003-0561)28 + colloca-tion01DV Years = the three years over which the design value was calculated (e.g., 2011-2013).2This applies to all non-federal reference method (FRM) or -federal equivalence method (FEM) designated instruments, or when there is not enough FRM or FEM data to make a design valuedetermination.Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.Clark County, Nevada:Annual Monitoring Network Plan ReportPage | 32.3 PM10Table 3. Minimum Monitoring Requirements for PM10MSA County Pop. & Census YearMax. Concentration in2013 [ȝg/m3]Max. Conc. Site (name,AQS ID)# Req’dMonitors# Active Moni-tors# Add’l MonitorsNeededLas VegasParadise(29820)Clark, NV 2,000,759 (2012) 267Sunrise Acres(32-003-0561)6-10 9 0Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.2.4 NO2Table 4. Minimum Monitoring Requirements for NO2CBSA1Pop. & Cen-sus YearMax AADTCounts(2012)# Req’dNear-roadMonitors# ActiveNear-roadMonitors# Add’l Near-roadMonitors Needed# Req’d Area-wide Monitors# ActiveAr-ea wideMonitors# Add’l Area-wideMonitors NeededLas Vegas-ParadisePahrump (332)2,000,759(2012)260,000 1 0 1 1 2 01Core-Based Statistical Area.Monitors required for SIP or maintenance plan: NA.J.D. Smith and Sunrise Acres meet requirements for area wide monitors; Sunrise Acres meets RA40 requirements. EPA Regional Administrator-required monitors per 40CFR 58, App. D, Sec. 4.3.4: 1Monitors required for PhotochemicalAssessment Monitoring Station: NAOne near-road NO2monitor is expected to commence in 2014.2.5 SO2Table 5. Minimum Monitoring Requirements for SO2CBSA CountyPop. & CensusYearTotal SO21[tons/yr]Pop. Weighted Emissions Index2[million persons-tons/yr]# Req’d Moni-tors# ActiveMonitors# Add’l Moni-tors NeededLas Vegas-ParadisePahrump (332)Clark, NV 2,000,759 (2012) 7,179 14,364 (est.) 1 1 0Clark County, Nevada:Annual Monitoring Network Plan ReportPage | 41Using 2011 NEI data.2Calculated by multiplying CBSA population and total SO2and dividing product by one million.Population WeightedEmissions Index requirements met.Monitors required for SIP or maintenance plan: NAEPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.4.3: 0This network meets the minimum monitoring requirement for the referenced criteria pollutant.2.6 COTable 6. Minimum Monitoring Requirements for COCBSA Pop. & Census Year # Req’d Near-Road Monitors # Active Near-Road Monitors # Add’l Monitors NeededLas Vegas-Paradise-Pahrump(332)2,000,759 (2012) 0 0 0Monitors required for SIP or maintenance plan: NAEPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.2.2: 0This network meets the minimum monitoring requirement for the referenced criteria pollutant.2.7 PbThe source emission threshold for the ambient source-oriented Pb monitoring requirement is 0.50 tons per year. DAQ has not identifiedsources that might trigger this requirement, and a preliminary assessment has shown no such sources within Clark County. Therefore, DAQdoes not conduct source-oriented Pb monitoring.Table 7. Minimum Monitoring Requirements for Pb at NCoreNCore Site(name, AQS ID)CBSA Pop. & Census Year # Req’d Monitors #Active Monitors # Add’l Monitors NeededJerome Mack Middle School(32-003-0540)Las Vegas-ParadisePahrump (332)2,000,759 (2012) 1 1 0Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.Clark County, Nevada:Annual Monitoring Network Plan ReportPage | 5Section 3: Collocated Monitors as of 2014Table 8. Filter-Based PM2.5FRM NetworkMethod Code # Primary Monitors, Site # RequiredCollocated Monitors # Active Collocated MonitorsRFPS-0498-118 3: Sunrise Acres, Jean and Jerome Mack 1 1 QA collocatedDAQ has upgraded its entire PM2.5FRM network to Thermo Scientific Model 2025i (Method RFPS-0498-118) sampler.Table 9. Continuous PM2.5FEM NetworkMethod Code # Primary Monitors, Site# RequiredCollocated Monitors# Active Collocated FRMMonitors# Active Collocated FEM Monitors(same method designation as primary)EQPM-0609-1834: J.D. Smith, Green Val-ley, Sunrise Acres, Jean1 1 0EQPM-0308-170 1, Jerome Mack 1 1 0Appendix A of 40 CFR 58 requires 15% of PM2.5FRM and FEM samplers in a network to be collocated. For the PM2.5FRM network (method RFPS-0498-118), the collocated sampler is located at the Jerome Mack (NCore) site. For the PM2.5FEM network (methods EQPM-0609-183 and EQPM-0308-170), the collocated samplers are located at Sunrise Acres and Jerome Mack, respectively. This collocation arrangementmeets the Appendix A requirement.All but two DAQ sites with continuous PM2.5FEM monitors have a collocated PM2.5FRM sampler. The exceptions are J.D. Smith and GreenValley, where the continuous FEM monitor is the only PM2.5instrument on site. The PM2.5FEM monitor at Sunrise Acres serves as the site’sprimary PM2.5monitor. The Jerome Mack PM2.5FEM monitor is part of the PM Coarse system.

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# Section 4: 2013 Site Tables

Figure 1: Apex.

The primary objective of this site, approximately 25 miles northeast of Las Vegas, is to monitor the ambient impacts of emissions from nearby processing facilities and power plants. Since the site is generally downwind from Las Vegas, it also serves as an indicator of pollutant transport flow out of the Las Vegas Valley. It is the only Air Quality monitoring station in the Apex Valley. Apex is an EPA-approved seasonal O 3 

### monitoring site that operates between April and September.

Local Site Name (AQS ID) Apex (32-003-0022) GPS Coordinates (latitude, longitude) +36.391111°, -114.907500° Street Address 12101 U.S. Highway 93, Las Vegas, NV 89030 Distance to roadway (m) 108 Traffic count (AADT, yr) 1900 (2012) Ground cover Native desert Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC O 3 , 1
Parameter code 44201 Basic monitoring objective(s) NAAQS comparison Site type(s) Regional transport Monitor type(s) SLAMS

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 7 Pollutant, POC O 3 , 1
Instrument manufacturer & model TAPI 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other FEM Collecting agency DAQ Analytical lab NA Reporting agency DAQ Spatial scale Regional Monitoring start date 01/01/1998 Current sampling frequency Continuous, seasonal Calculated sampling frequency Continuous, seasonal Sampling season 04/01-09/30 Probe height (m) 3.8 Distance from supporting structure (m) 1.4 Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) NA Obstruction not on roof height (m) NA Distance from trees (m) NA Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) 2.9 Will there be changes within the next 18 months? (Y/N) N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily Last annual performance evaluation for gaseous parameters 07/18/2013
Last two semiannual flow rate audits for PM monitors NA



## Meteorological measurements include wind speed, wind direction, and ambient temperature.

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### Figure 2: Boulder City.

This site, approximately 25 miles southeast of Las Ve gas, was established at the request of Boulder City government officials and residents to serve as an indicator of population exposure to pollutants, particularly O 3 

### and PM 10 

### .
Local Site Name (AQS ID) Boulder City (32-003-0601) GPS Coordinates (latitude, longitu de) +35.978056°, -114.846389° Street Address 1005 Industrial Rd., Boulder City, NV 89005 Distance to roadway (m) 58 Traffic count (AADT, yr) 1,600 (2012) Ground cover Paved, native desert Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM10, 1 O3, 1
Parameter code 81102 44201 Basic monitoring objective(s) NAAQS comparison NAAQS comparison
Site type(s) Population exposure Population exposure, regional transport Monitor type(s) SLAMS SLAMS
Instrument manufacturer & model Thermo FH62C14 TAPI 400 series Method code EQPM-1102-150 EQOA-0992-087
FRM/FEM/ARM/other FEM FEM Collecting agency DAQ DAQ

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 9 Pollutant, POC PM10, 1 O3, 1 Analytical lab NA NA Reporting agency DAQ DAQ Spatial scale Neighborhood Urban Monitoring start date 01/01/1998 07/01/1998 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Year-round Year-round Probe height (m) 5.0 4.0 Distance from supporting structure (m) 1.7 1.6 Distance from obstructions on roof (m) NA NA Distance from obstructions not on roof (m) NA NA Obstruction not on roof height (m) NA NA Distance from trees (m) NA NA Distance to furnace or incinerator flue (m) NA NA Distance between collocated monitors (m) NA NA Unrestricted airflow (degrees) 360 360 Probe material for reactive gases NA Teflon Residence time for reactive gases (s) NA 3.0 Will there be changes within the next 18 months? (Y/N) N N
Is it suitable for comparison against the annual PM2.5? (Y/N) NA NA
Frequency of flow rate verification for manual PM samplers NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly NA
Frequency of one-point QC check for gaseous instruments NA Daily
Last annual performance evaluation for gaseous parameters NA 10/10/2013

Last two semiannual flow rate audits for PM monitors 06/27/2013; 10/07/2013 NA



## Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric pressure.

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### Figure 3: Green Valley.

This site in Henderson was established in response to citizen complaints about dust emissions from a gravel processing plant, and continues to monitor PM 10 

### and PM 2.5 

### .
Local Site Name (AQS ID) Green Valley (32-003-0298) GPS Coordinates (latitude, longitude) +36.048611°, -115.052778° Street Address 298 Arroyo Grand e Blvd., Henderson, NV 89014 Distance to roadway (m) 12.2 Traffic count (AADT, yr) <1,000 (2013) (estimated) Ground cover Paved, gravel Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10, 1 PM 2.5 (cont.), 3
Parameter code 81102 88101 Basic monitoring objective(s) NAAQS comparison NAAQS comparison Site type(s) Population exposure Population exposure Monitor type(s) SLAMS SLAMS
Instrument manufacturer & model Thermo FH62C14 Thermo 5014i Method code EQPM-1102-150 EQPM-0609-183
FRM/FEM/ARM/other FEM FEM Collecting agency DAQ DAQ Analytical lab NA NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 11 Pollutant, POC PM 10, 1 PM 2.5 (cont.), 3 Reporting agency DAQ DAQ Spatial scale Middle Middle Monitoring start date 01/01/1998 10/01/2013 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Year-round Year-round Probe height (m) 4.8 4.8 Distance from supporting structure (m) 1.8 1.8 Distance from obstructions on roof (m) NA NA Distance from obstructions not on roof (m) NA NA Obstruction not on roof height (m) NA NA Distance from trees (m) 9.0 6.5 Distance to furnace or incinerator flue (m) NA NA Distance between collocated monitors (m) 2.4 2.4 Unrestricted airflow (degrees) 360 360 Probe material for reactive gases NA NA Residence time for reactive gases (s) NA NA Will there be changes within the next 18 months? (Y/N) N N
Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N Y
Frequency of flow rate verification for manual PM samplers NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly Biweekly
Frequency of one-point QC check for gaseous instruments NA NA
Last annual performance evaluation for gaseous parameters NA NA

Last two semiannual flow rate audits for PM monitors 03/14/2013; 07/19/2013 03/14/2013; 07/19/2013; 10/08/2013



## Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric pressure.
DAQ is planning the installation of an O 3 

## monitor at the Green Valley site and is requesting a waiver based on 40 CFR 58, Appendix E, Section 10. Distance to the roadway is approximately 12 m; however, traffic volume is so low that the effects of scavenging should be negligible. In addition, DAQ anticipates moving the shelter away from the road and trees to meet siting criteria. Other considerations are that this would be the only O 3 

## monitor in the city of Henderson, the monitor would represent the neighborhood (spatial scale), and the monitor would meet the objective of population exposure.

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### Figure 4: J.D. Smith.

This site in North Las Vegas replaced the old McDaniel and Post Office PM sites. It monitors gaseous (NO 2 

### , CO, and O 3 

### ) and particulate (PM 10 

### and PM 2.5 

### ) pollutants using continuous methods. It also serves as an indicator of population exposure to pollutants.

Local Site Name (AQS ID) J.D. Smith (32-003-2002) GPS Coordinates (latitude, longitude) +36.191111°, -115.123056° Street Address 1301B Tonopah Ave., North Las Vegas, NV 89030 Distance to roadway (m) 135 Traffic count (AADT, yr) 7,500 (2012) Ground cover Paved, grass Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10 , 1 CO, 1 NO 2 , 1 O 3 , 1 PM 2.5 (cont.), 3

Parameter code 81102 42101 42602 44201 88101 Basic monitoring objective(s) NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison
Site type(s) Population exposure Population exposure Highest concentration Population exposure Population exposure Monitor type(s) SLAMS SLAMS SLAMS SLAMS SLAMS

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 13 Pollutant, POC PM 10 , 1 CO, 1 NO 2 , 1 O 3 , 1 PM 2.5 (cont.), 3
Instrument manufacturer & model Thermo FH62C14 TAPI 300 series TAPI 200 series TAPI 400 series Thermo 5014i

Method code EQPM-1102-150 RFCA-1093-093 RFNA-1194-099 EQOA-0992-087 EQPM-0609-183

FRM/FEM/ARM/other FEM FRM FRM FEM FEM
Collecting agency DAQ DAQ DAQ DAQ DAQ
Analytical lab NA NA NA NA NA
Reporting agency DAQ DAQ DAQ DAQ DAQ
Spatial scale Neighborhood Neighborhood Neighborhood Neighborhood Neighborhood
Monitoring start date 01/01/1998 01/10/1998 01/10/1998 01/10/1998 01/01/2013 Current sampling frequency Continuous Continuous Continuous Continuous Continuous
Calculated sampling frequency Continuous Continuous Continuous Continuous Continuous

Sampling season Year-round Year-roun d Year-round Year-round Year-round
Probe height (m) 4.6 3.7 3.7 3.7 4.6Distance from supporting structure (m) 2.0 1.3 1.3 1.3 2.0

Distance from obstructions on roof (m) NA NA NA NA NA
Obstruction (wall) not on roof height (m) 5.7 5.7 5.7 5.7 5.7

Distance from obstructions not on roof (m) 3.2 4.0 4.0 4.0 5.3
Distance from trees (m) 22 18.1 18.1 18.1 20
Distance to furnace or incinerator flue (m) NA NA NA NA NA

Distance between collocated monitors (m) 2.6 NA NA NA NA

Unrestricted airflow (degrees) 360 360 360 360 360

Probe material for reactive gases NA Teflon Teflon Teflon NA

Residence time for reactive gases (s) NA 6.6 9.8 6.0 NA
Will there be changes within the next 18 months? (Y/N) N N N N N
Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N N N Y

Frequency of flow rate verification for manual PM samplers NA NA NA NA NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 14 Pollutant, POC PM 10 , 1 CO, 1 NO 2 , 1 O 3 , 1 PM 2.5 (cont.), 3Frequency of flow rate verification for automated PM analyzers Biweekly NA NA NA Biweekly

Frequency of one-point QC check for gaseous instruments NA Daily Daily Daily NA
Last annual performance evaluation for gaseous parameters NA 12/27/2013 12/27/2013 10/11/2013 NA

Last two semiannual flow rate audits for PM monitors 06/27/2013; 10/11/2013 NA NA NA 06/27/2013; 10/11/2013



## Meteorological measurements include wind speed, wind direction, ambient temperature, relative humidity, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

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### Figure 5: Jean.

The Jean site is approximately 30 miles south of Las V egas. This site was originally set up as an upwind background site; it still serves this purpose for PM. The primary objective for O3 monitoring is to measure transport from southern California.

Local Site Name (AQS ID) Jean (32-003-1019) GPS Coordinates (latitude, longitude) +35.785556°, -115.356944° Street Address 1965 State Route 161, Jean, NV 89019 Distance to roadway (m) 1,287 Traffic count (AADT, yr) 1,600 (2012) Ground cover Gravel, native desert Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10 , 1 PM 2.5 (FRM), 1 O 3 , 1 PM 2.5 (cont.), 3
Parameter code 81102 88101 44201 88101 Basic monitoring objective(s) NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison Site type(s) Upwind background Upwind background Regional transport Upwind background Monitor type(s) SLAMS SLAMS SLAMS SLAMS
Instrument manufacturer & model Thermo FH62C14 Thermo 2025i API 400 series Thermo 5014i

Method code EQPM-1102-150 RFPS-0498-118 EQOA-0992-087 EQPM-0609-183
FRM/FEM/ARM/other FEM FRM FEM FEM Collecting agency DAQ DAQ DAQ DAQ Analytical lab NA Weigh NA NA Reporting agency DAQ DAQ DAQ DAQ

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 16 Pollutant, POC PM 10 , 1 PM 2.5 (FRM), 1 O 3 , 1 PM 2.5 (cont.), 3 Spatial scale Regional Regional Regional Regional Monitoring start date 01/01/1995 01/01/1999 08/01/1998 04/01/2013 Current sampling frequency Continuous 1:3 Continuous Continuous Calculated sampling frequency Continuous 1:3 Continuous Continuous Sampling season Year-round Yea r-round Year-round Year-round Probe height (m) 4.4 2.1 3.9 4.6Distance from supporting structure (m) 2.0 2.1 1.5 2.1

Distance from obstructions on roof (m) NA NA NA NA

Distance from obstructions not on roof (m) NA NA NA NA
Obstruction not on roof height (m) NA NA NA NA
Distance from trees (m) NA NA NA NA
Distance to furnace or incinerator flue (m) NA NA NA NA

Distance between collocated monitors (m) 2.6 NA NA 2.6
Unrestricted airflow (degrees) 360 360 360 360Probe material for reactive gases NA NA Teflon NA

Residence time for reactive gases (s) NA NA 2.3 NA
Will there be changes within the next 18 months? (Y/N) N N N N
Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N Y N Y
Frequency of flow rate verification for manual PM samplers NA Monthly NA NA

Frequency of flow rate verification for automated PM analyzers Biweekly NA NA Biweekly

Frequency of one-point QC check for gaseous instruments NA NA Daily NA

Last annual performance evaluation for gaseous parameters NA NA 10/22/2013 NA

Last two semiannual flow rate audits for PM monitors 03/13/2013; 08/12/2013 03/13/2013; 06/28/2013; 08/12/2013; 12/20/2013 NA 03/13/2013; 08/12/2013



## Meteorological measurements include wind speed, wind direction, ambient temperature, solar radiation, and barometric pressure.

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### Figure 7: Jerome Mack.

This site in east Las Vegas is the Clark County NCore site. Its primary objective is to monitor trace-level gaseous pollutants, PM parameters (including PM 2.5 

### , PM coarse, and speciated PM parameters), and meteorological parameters as part of a nationwide network. Because of NCore requirements, speciation sampling was moved here from the East Craig Road site in May 2010. Beginning 2014, this site will host PM 2.5 

### primary and collocated FRM samplers.

Local Site Name (AQS ID) Jerome Mack (32-003-0540) GPS Coordinates (latitude, longitude) +36.141944°, -115.078611° Street Address 4250 Karen Avenue, Las Vegas, NV 89121 Distance to roadway (m) 482 Traffic count (AADT, yr) 23,000 (2012) Ground cover Concrete, grass Representative statistical area name Las Vegas-Paradise, NV MSAClark County, Nevada:Annual Monitoring Network Plan ReportPage | 18Pollutant, POC PM10, 3PM2.5(cont.), 3PM10-2.5(cont.), 3PM2.5(FRM),1SpeciationSASS, 5SpeciationURG, 5O3, 1 NOY, 1 Trace CO, 1Trace SO2,1Pb, 1Parameter code 81102 88101 86101 88101 88502 88355 44201 42600 42101 42401 14129Basic monitoringobjective(s)NAAQScomparisonNAAQScomparisonResearchsupportNAAQScomparisonResearchsupportResearchsupportNAAQScomparisonResearchsupportResearchsupportNAAQScomparisonNAAQScomparisonSite type(s)PopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposureMonitor type(s) NCore NCore NCore NCore NCore NCore NCore NCore NCore NCore NCoreInstrument manufacturer & modelMetoneBAM 1020MetoneBAM 1020MetoneBAM 1020(mathematical difference)Thermo2025iMet OneSASSURG 3000TAPI 400seriesTAPI200EUTAPI 300EUTAPI100EUAmericanEcotechHiVol 3000Method codeEQPM-0798-122EQPM-0308-170EQPM-0709-185RFPS-0498-118NA NAEQOA-0992-087NARFCA-1093-093EQSA-0495-100EQL-0510-191FRM/FEM/ARM/otherFEM FEM FEM FRM Other Other FEM Other FRM FEM FEMCollecting agency DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQAnalytical lab NA NA NA Weigh RTI RTI NA NA NA NA RTIReporting agency DAQ DAQ DAQ DAQ RTI RTI DAQ DAQ DAQ DAQ DAQSpatial scaleNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodUrbanNeighbor-hoodNeighbor-hoodNeighbor-hoodMonitoring startdate01/01/2012 01/01/2012 01/01/2012 10/01/2013 05/2010 05/2010 01/01/2011 01/01/2011 01/01/2011 01/01/2011 01/01/2012Current samplingfrequencyContinuous ContinuousContinu-ous1:3 1:3 1:3 Continuous Continuous Continuous Continuous 1:6Calculated sampling frequencyContinuous ContinuousContinu-ous1:3 1:3 1:3 Continuous Continuous Continuous Continuous 1:6Sampling season Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-roundProbe height (m) 5.1 5.1 5.1 3.12.8 3.1 4.1 6.9 4.1 4.1 2.2Clark County, Nevada:Annual Monitoring Network Plan ReportPage | 19Pollutant, POC PM10, 3PM2.5(cont.), 3PM10-2.5(cont.), 3PM2.5(FRM),1SpeciationSASS, 5SpeciationURG, 5O3, 1 NOY, 1 Trace CO, 1Trace SO2,1Pb, 1Distance from supporting structure(m)2.1 2.1 2.1 2.1 1.8 2.2 1.1 7.0 1.1 1.1 1.3Distance from obstructions on roof(m)NA NA NA NA NA NA NA NA NA NA NADistance from obstructions not onroof (m)NA NA NA 5.9 5.6 4.0 NA NA NA NA 7.7Obstruction (shelter) not on roofheight (m)NA NA NA 3.1 3.1 3.1 NA NA NA NA 3.1Distance from trees(m)19.3 20.1 NA 24.8 22.9 22.5 19.0 17.7 19.0 19.0 26.0Distance to furnaceor incinerator flue(m)NA NA NA NA NA NA NA NA NA NA NADistance betweencollocated monitors(m)2.7 2.7 NA 2.9 2.3 2.3 NA NA NA NA NAUnrestricted airflow(degrees)360 360 360 360 360 360 360 360 360 360 360Probe material forreactive gasesNA NA NA NA NA NA Teflon Teflon Teflon Teflon NAResidence time forreactive gases (s)NA NA NA NA NA NA 2.6 NA 1.0 3.1 NAWill there bechanges within thenext 18 months?(Y/N)N N N N N N N N N N NIs it suitable forcomparison againstthe annual PM2.5?(Y/N)N Y N Y N N N N N N NClark County, Nevada:Annual Monitoring Network Plan ReportPage | 20Pollutant, POC PM10, 3PM2.5(cont.), 3PM10-2.5(cont.), 3PM2.5(FRM),1SpeciationSASS, 5SpeciationURG, 5O3, 1 NOY, 1 Trace CO, 1Trace SO2,1Pb, 1Frequency of flowrate verification formanual PM samplersNA NA NA Monthly Monthly Monthly NA NA NA NA MonthlyFrequency of flowrate verification forautomated PManalyzersBiweekly Biweekly Biweekly NA NA NA NA NA NA NA NAFrequency of onepoint QC check forgaseous instrumentsNA NA NA NA NA NA Daily Daily Daily Daily NALast annual performance evaluation for gaseousparametersNA NA NA NA NA NA 10/23/2013 12/31/2013 12/18/2013 12/31/2013 NALast two semiannual flow rate audits for PM monitors03/15/2013;08/15/201303/15/2013;08/15/2013NA03/07/2013;06/28/2013;08/13/2013;11/13/201303/25/2013;06/21/2013;08/13/2013;12/05/201303/25/2013;06/21/2013;08/13/2013;12/05/2013NA NA NA NA03/27/2013;05/17/2013;08/13/2013;11/13/2013Meteorological measurements include wind speed, wind direction, ambient temperature, relative humidity, precipitation, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 21 

### Figure 8: Joe Neal.

The primary objectives of this site in northwest Las Vegas are to monitor O 3 

### and its precursors in an area of high O 3 

### concentrations, and to support DAQ modeling efforts. T he topography is such that the summertime loft brings higher O 3 

### and precursor levels toward this site from the east end of the Las Vegas Valley. PM 10 

### was initially deployed at this site due to population growth in the northwest, and the site continues to serve as a high O 3 

### indicator. A NO x 

### monitor was added in January 2008 to monitor for O 3 

### precursors.
Local Site Name (AQS ID) Joe Neal (32-003-0075) GPS Coordinates (latitude, longitude) +36.270556°, -115.238333° Street Address 6651 W. Azure Way, Las Vegas, NV 89130 Distance to roadway (m) 12.6 Traffic count (AADT, yr) 4,000 (2013) (estimated) Ground cover Gravel, grass, pavement Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10 , 1 O 3 , 1 NO 2 , 1
Parameter code 81102 44201 42602 Basic monitoring objective(s) NAAQS comparison NAAQS comparison Research support Site type(s) Population exposure Max .ozone concentration Max. precursor impact Monitor type(s) SLAMS SLAMS SLAMS

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 22 Pollutant, POC PM 10 , 1 O 3 , 1 NO 2 , 1
Instrument manufacturer & model Thermo FH62C14 API 400 series API 200 series Method code EQPM-1102-150 E QOA-0992-087 RFNA-1194-099
FRM/FEM/ARM/other FEM FEM FRM Collecting agency DAQ DAQ DAQ Analytical lab NA NA NA Reporting agency DAQ DAQ DAQ Spatial scale Neighborhood Neighborhood Neighborhood Monitoring start date 01/01/2001 07/01/2000 01/01/2008 Current sampling frequency Continuous Continuous Continuous Calculated sampling frequency Continuous Continuous Continuous Sampling season Year-round Year-round Year-round Probe height (m) 5.6 4.6 4.6 Distance from supporting structure (m) 2.5 1.6 1.6 Distance from obstructions on roof (m) NA NA NA Distance from obstructions not on roof (m) NA NA NA Obstruction not on roof height (m) NA NA NA Distance from trees (m) 19.9 21.5 21.5 Distance to furnace or incinerator flue (m) NA NA NA Distance between collocated monitors (m) NA NA NA Unrestricted airflow (degrees) 360 360 360 Probe material for reactive gases NA Teflon Teflon Residence time for reactive gases (s) NA 2.7 4.8 Will there be changes within the next 18 months? (Y/N) N N N
Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N N
Frequency of flow rate verification for manual PM samplers NA NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly NA NA
Frequency of one-point QC check for gaseous instruments NA Daily Daily

Last annual performance evaluation for gaseous parameters NA 07/24/2013 12/19/2013

Last two semiannual flow rate audits for PM monitors 03/14/2013; 07/18/2013 NA NA



## Meteorological measurements include wind speed, wind direction, ambient temperature, relative humidity, solar radiation, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 23 

### Figure 9: Mesquite.

This site, approximately 70 miles north of Las Vegas and monitors O 3 

### . It sits along a transport and exit corridor forjurisdictional boundaries, and serves as an indicator of population exposure to pollutants. Mesquite is an EPAapproved seasonal O 3 

### monitoring site that operates between April and September.

Local Site Name (AQS ID) Mesquite (32-003-0023) GPS Coordinates (latitude, longitude) +36.807778°, -114.061389° Street Address 465 E. Old Mill Rd., Mesquite, NV 89027 Distance to roadway (m) 7.7 Traffic count (AADT, yr) <1,000 (estimate), 2013 Ground cover Pavement, gravel Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC O 3 , 1
Parameter code 44201 Basic monitoring objective(s) NAAQS comparison Site type(s) Population exposure Monitor type(s) SLAMS
Instrument manufacturer & model API 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other FEM Collecting agency DAQ

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 24 Pollutant, POC O 3 , 1 Analytical lab NA Reporting agency DAQ Spatial scale Neighborhood Monitoring start date 10/01/2001 Current sampling frequency Continuous, seasonal Calculated sampling frequency Continuous, seasonal Sampling season 04/01-09/30 Probe height (m) 3.6 Distance from supporting structure (m) 1.2 Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) NA Obstruction not on roof height (m) NA Distance from trees (m) 28 Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) 2.6 Will there be changes within the next 18 months? (Y/N) N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily Last annual performance evaluation for gaseous parameters 09/18/2013
Last two semiannual flow rate audits for PM monitors NA



## Meteorological measurements include wind speed, wind direction, and ambient temperature.

The O 3 

## monitor at Mesquite does not meet distance-to-roadway siting requirements; however, DAQ is requesting a waiver based on 40 CFR 58, Appendix E, Section 10. This O 3 

## monitor is the only monitor in the Virgin Valley airshed (Hydrographic Area 222): it represents the neighborhood (see spatial scale) and meets its objective of population exposure, and there are physical constraints to relocation.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 25 

### Figure 10: Palo Verde.

The primary objective of this site in west Las Vegas is to monitor O 3 

### , but it also monitors PM 10 

### . The topography is such that the summertime loft brings higher O 3 

### and precursor levels toward this site from the east end of the Las Vegas Valley.

Local Site Name (AQS ID) Palo Verde (32-003-0073) GPS Coordinates (latitude, longitude) +36.173333°, -115.332778° Street Address 333 Pavilion Center Dr., Las Vegas, NV 89144 Distance to roadway (m) 14.7 Traffic count (AADT, yr) 7,000 (2013) (estimated) Ground cover Paved Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10 , 1 O 3 , 1
Parameter code 81102 44201 Basic monitoring objective(s) NAAQS comparison NAAQS comparison Site type(s) Population exposure Population exposure Monitor type(s) SLAMS SLAMS
Instrument manufacturer & model Thermo FH62C14 API 400 series Method code EQPM-1102-150 EQOA-0992-087
FRM/FEM/ARM/other FEM FEM Collecting agency DAQ DAQ

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 26 Pollutant, POC PM 10 , 1 O 3 , 1 Analytical lab NA NA Reporting agency DAQ DAQ Spatial scale Middle Neighborhood Monitoring start date 07/01/1998 07/01/1998 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Year-round Year-round Probe height (m) 4.7 3.8 Distance from supporting structure (m) 2.2 1.4 Distance from obstructions on roof (m) NA NA Distance from obstructions not on roof (m) NA NA Obstruction not on roof height (m) NA NA Distance from trees (m) 25.0 27.1 Distance to furnace or incinerator flue (m) NA NA Distance between collocated monitors (m) NA NA Unrestricted airflow (degrees) 360 360 Probe material for reactive gases NA Teflon Residence time for reactive gases (s) NA 2.2 Will there be changes within the next 18 months? (Y/N) N N
Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N
Frequency of flow rate verification for manual PM samplers NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly NA
Frequency of one-point QC check for gaseous instruments NA Daily
Last annual performance evaluation for gaseous parameters NA 10/21/2013

Last two semiannual flow rate audits for PM monitors 03/15/2013; 07/18/2013 NA



## Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 27 

### Figure 11: Paul Meyer.

The primary objective of this site in southwest Las Vegas is to monitor O 3 

### , but it also monitors PM 10 

### . The topography is such that the summe rtime loft brings higher O 3 

### and precursor levels toward this site from the east end of the Las Vegas Valley.

Local Site Name (AQS ID) Paul Meyer (32-003-0043) GPS Coordinates (latitude, longitude) +36.106389°, -115.253333° Street Address 4525 New Forest Dr., Las Vegas, NV 89147 Distance to roadway (m) 102 Traffic count (AADT, yr) 5,000 (2013) (estimated) Ground cover Concrete, grass Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10 , 1 O 3 , 1
Parameter code 81102 44201 Basic monitoring objective(s) NAAQS comparison NAAQS comparison Site type(s) Population exposure Population exposure Monitor type(s) SLAMS SLAMS
Instrument manufacturer & model Thermo FH62C14 API 400 series Method code EQPM-1102-150 EQOA-0992-087
FRM/FEM/ARM/other FEM FEM

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 28 Pollutant, POC PM 10 , 1 O 3 , 1 Collecting agency DAQ DAQ Analytical lab NA NA Reporting agency DAQ DAQ Spatial scale Neighborhood Neighborhood Monitoring start date 01/01/1998 07/01/1998 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Year-round Year-round Probe height (m) 4.8 3.9 Distance from supporting structure (m) 1.6 1.4 Distance from obstructions on roof (m) NA NA Distance from obstructions not on roof (m) NA NA Obstruction not on roof height (m) NA NA Distance from trees (m) 15.3 15.1 Distance to furnace or incinerator flue (m) NA NA Distance between collocated monitors (m) NA NA Unrestricted airflow (degrees) 360 360 Probe material for reactive gases NA Teflon Residence time for reactive gases (s) NA 2.9 Will there be changes within the next 18 months? (Y/N) N N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N Frequency of flow rate verification for manual PM samplers NA NA Frequency of flow rate verification for automated PM analyzers Biweekly NA Frequency of one-point QC check for gaseous instruments NA Daily Last annual performance evaluation fo r gaseous parameters NA 03/29/2013 Last two semiannual flow rate audits for PM monitors 03/14/2013; 07/18/2013 NA



## Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 29 

### Figure 12: Sunrise Acres.

Monitoring at this site near the center of the Las Vegas Valley began as part of a CO study in the 1990s. All monitoring activities at the East Charleston site were transfe rred here when that lease was terminated. The site’s primary objective is to monitor CO and PM; it monitors PM 10 

### , and PM 2.5 

### using both filter-based and continuous methodologies. Beginning 2014, the PM 2.5 

### FEM will be the primary monitor at this site, and it will be collocated with a PM 2.5 

### FRM.

Local Site Name (AQS ID) Sunrise Acres (32-003-0561) GPS Coordinates (latitude, longitude) +36.163889°, -115.113889° Street Address 2501 Sunrise Ave., Las Vegas, NV 89101 Distance to roadway (m) 128 Traffic count (AADT, yr) 3,000 (2013) (estimated) Ground cover Paved Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC PM 10 , 1 CO, 1 PM 2.5 (FRM), 1 PM 2.5 FRM Collocated, 2 PM 2.5 (cont.), 3 NO 2 , 1

Parameter code 81102 42101 88101 88101 88101 42602Basic monitoring objective(s) NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison
Site type(s) Population exposure Highest concentration Highest concentration Highest concentration Highest concentration Population exposure Monitor type(s) SLAMS SLAMS SLAMS QA collocated SLAMS SLAMS

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 30 Pollutant, POC PM 10 , 1 CO, 1 PM 2.5 (FRM), 1 PM 2.5 FRM Collocated, 2 PM 2.5 (cont.), 3 NO 2 , 1

Instrument manufacturer & model Thermo FH62C14 API 300 series Thermo 2025i Thermo 2025i Thermo 5014i API 200 series

Method code EQPM-1102- 150 RFCA-1093-093 RFPS-0498- 118 RFPS-0498- 118 EQPM-0609- 183 RFNA-1194- 099 FRM/FEM/ARM/other FEM FRM FRM FRM FEM FRM Collecting agency DAQ DAQ DAQ DAQ DAQ DAQ Analytical lab NA NA Weigh Weigh NA NA Reporting agency DAQ DAQ DAQ DAQ DAQ DAQ Spatial scale Neighborhood Neighborhood Neighborhood Neighborhood Neighborhood Neighborhood Monitoring start date 04/17/2004 10/01/1996 07/01/2012 07/01/2012 10/01/2012 01/01/2013 Current sampling frequency Continuous Continuous 1:3 1:6 Continuous ContinuousCalculated sampling frequency Continuous Continuous 1:3 1:6 Continuous Continuous
Sampling season Year-round Year-round Year-round Year-round Year-round Year-round Probe height (m) 4.9 3.6 2.9 2.9 3.6 3.6 Distance from supporting structure (m) 2.2 1.2 2.1 2.1 2.1 1.2

Distance from obstructions on roof (m) NA NA NA NA NA NA

Distance from obstructions not on roof (m) NA NA 8.4 8.4 NA NA

Obstruction not on roof height (m) NA NA 3.4 3.4 NA NA
Distance from trees (m) NA NA NA NA NA NA
Distance to furnace or incinerator flue (m) NA NA NA NA NA NA

Distance between collocated monitors (m) 3.0 NA 2.1 2.1 3.0 NA
Unrestricted airflow (degrees) 360 360 360 360 360 360

Probe material for reactive gases NA Teflon NA NA NA Teflon

Residence time for reactive gases (s) NA 5.4 NA NA NA 8.1

Will there be changes within the next 18 months? (Y/N) N N Yes. This will become the collocated sampler for PM 2.5
. Yes. This sampler will

move to Jerome Mackfor FRM collocation. Yes. This will become the primary monitor for PM 2.5
. N

Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N Y Y Y N

Frequency of flow rate verification for manual PM samplers NA NA Monthly Monthly NA NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 31 Pollutant, POC PM 10 , 1 CO, 1 PM 2.5 (FRM), 1 PM 2.5 FRM Collocated, 2 PM 2.5 (cont.), 3 NO 2 , 1
Frequency of flow rate verification for automated PM analyzers Biweekly NA NA NA Biweekly NA

Frequency of one-point QCcheck for gaseous instruments NA Daily NA NA NA Daily

Last annual performance evaluation for gaseous parameters NA 12/26/2013 NA NA NA 12/26/2013

Last two semiannual flow rate audits for PM monitors 06/28/2013; 10/08/2013 NA 03/27/2013; 06/20/2013; 08/15/2013; 12/31/2013 03/27/2013; 06/20/2013; 08/15/2013; 12/31/2013 06/28/2013; 10/08/2013 NA



## Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 32 

### Figure 13: Walter Johnson.

The primary objective of this site on the west side of Las Vegas is to monitor O 3 

### . The topography is such that the summertime loft brings high O 3 

### and precursor levels towards this site from the east end of the Las Vegas Valley.

Local Site Name (AQS ID) Walter Johnson (32-003-0071) GPS Coordinates (latitude, longitude) +36.169722°, -115.263056° Street Address 7701 Ducharme Ave., Las Vegas, NV 89145 Distance to roadway (m) 13.0 Traffic count (AADT, yr) 6,900 (2012) Ground cover Concrete/asphalt, grass Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC O 3 , 1
Parameter code 44201 Basic monitoring objective(s) NAAQS comparison Site type(s) Population exposure Monitor type(s) SLAMS
Instrument manufacturer & model API 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other FEM Collecting agency DAQ Analytical lab NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 33 Pollutant, POC O 3 , 1 Reporting agency DAQ Spatial scale Neighborhood Monitoring start date 08/01/1998 Current sampling frequency Continuous Calculated sampling frequency Continuous Sampling season Year-round Probe height (m) 3.8 Distance from supporting structure (m) 1.5 Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) 22.4 Obstruction not on roof height (m) 6.5 Distance from trees (m) 14.6 Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) 3.0 Will there be changes within the next 18 months? (Y/N) N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily Last annual performance evaluation for gaseous parameters 10/21/2013
Last two semiannual flow rate audits for PM monitors NA


## Meteorological measurements include barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 34 

### Figure 14: Winterwood.

This site on the east side of Las Vegas is one of DAQ’s oldest sites. Its primary objective is to monitor CO and O 3 

### , and it serves as an indicator for population exposure.

Local Site Name (AQS ID) Winterwood (32-003-0538) GPS Coordinates (latitude, longitude) +36.143056°, -115.056389° Street Address 5483 Club House Dr., Las Vegas, NV 89142 Distance to roadway (m) 42 Traffic count (AADT, yr) 400 (2013) (estimated) Ground cover Grass, paving, gravel Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC CO, 1 O 3 , 2
Parameter code 42101 44201 Basic monitoring objective(s) NAAQS comparison NAAQS comparison Site type(s) Population exposure Population exposure Monitor type(s) SLAMS SLAMS
Instrument manufacturer & model API 300 series API 400 series Method code RFCA-1093-093 EQOA-0992-087
FRM/FEM/ARM/other FRM FEM Collecting agency DAQ DAQ Analytical lab NA NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 35 Pollutant, POC CO, 1 O 3 , 2 Reporting agency DAQ DAQ Spatial scale Neighborhood Neighborhood Monitoring start date 01/01/1998 07/01/1979 Current sampling frequency Continuous Continuous Calculated sampling frequen cy Continuous Continuous Sampling season Year-round Year-round Probe height (m) 3.8 3.8 Distance from supporting structure (m) 1.3 1.3 Distance from obstructions on roof (m) NA NA Distance from obstructions not on roof (m) 4.6 4.6 Obstruction not on roof height (m) 6.0 6.0 Distance from trees (m) 28.0 28.0 Distance to furnace or incinerator flue (m) NA NA Distance between collocated monitors (m) NA NA Unrestricted airflow (degrees) 360 360 Probe material for reactive gases Teflon Teflon Residence time for reactive gases (s) 3.5 3.1 Will there be changes within the next 18 months? (Y/N) N N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N Frequency of flow rate verification for manual PM samplers NA NA Frequency of flow rate verification for automated PM analyzers NA NA Frequency of one-point QC check for gaseous instruments Daily Daily Last annual performance evaluation for gaseous parameters 12/30/2013 10/18/2013
Last two semiannual flow rate audits for PM monitors NA NA


## For all gaseous monitoring operations at all sites, a two-point (zero/span) QC check is conducted daily and a three-point (zero/precision/span) QC check is conducted weekly.
DAQ is considering temporarily or permanently closing this site, which will be part of its 2015 network assessment. If this site is closed permanently, DAQ will follow the requirements outlined in 40 CFR 58.14.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 36 

# Section 5: Maps of Criteria Pollutant Monitoring Stations in 2013

Figure 15: CO Monitors.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 37 

### Figure 16: O 3 

### Monitors.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 38 

### Figure 17: NO x 

### Monitors.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 39 

### Figure 18: SO 2 

### Monitors.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 40 

### Figure 19: Continuous PM 10 

### Monitors.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 41 

### Figure 20: Continuous PM 2.5 

### Monitors.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 42 

### Figure 21: Filter-Based PM 2.5 

### Sampler.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 43 

# Section 6: National Performance Audit and Performance Evaluation Programs
Each year, EPA Region 9 contracts for the National Performance Audit Program (NPAP) Through-theProbe (TTP) performance evaluation, which focuses on gaseous criteria pollutants. DAQ received a “Pass” on all NPAP and TTP performance evaluations in 2013.

Table 10. 2013 NPAP and TTP Evaluations
Monitoring Station Pollutant Evaluation Date
Joe Neal O 3 , NO 2 9/19/13
Winterwood O 3 , CO 9/20/13
Jerome Mack O 3 , CO, SO 2 9/23/13



## Each year, the PM 2.5 

## FRM sampling network undergoes a Performance Evaluation Program (PEP) audit. PEP audit results (in ȝ g/m 3 

## ) are generated and submitted to the AQS database.

Table 11. 2013 PEP Audit Activity
Sampler Location Pollutant Audit Date Sunrise Acres, Jean PM 2.5 (FRM) 2/06/13 Sunrise Acres, Jean PM 2.5 (FRM) 4/10/13
Jerome Mack PM 2.5 (FRM) 7/15/13
Jean PM 2.5 (FRM) 12/06/13

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 44 

# Section 7: Network Modifications
7.1 Completed Changes
DAQ has made the following network changes.

Table 12. Summary of 2013 Network Modifications
Action Date Explanation Replaced continuous PM 2.5 monitor at Jean 04/01/2013 Upgr aded from non-designated PM 2.5 to PM 2.5 FEM Replaced continuous PM 2.5 monitor at J.D. Smith 01/01/2013 Upgraded from non-designated PM 2.5 to PM 2.5 FEM Replaced continuous PM 2.5 monitor at Green Valley 10/01/2 013 Upgraded from non-designated PM 2.5 to PM 2.5 FEM
Added NO 2 monitoring at Sunrise Acres 01/01/2013 Added to meet RA40 requirements



## 7.2 Proposed Changes
This section, which describes anticipated and potential changes to the monitoring network over the next two years, constitutes Clark County’s official request to Region 9 for approval of proposed changes.

Table 13. Proposed Site and E quipment Changes, 2014–2015
Site/Equipment Changes Date Explanation Near-road site 1 July 2014 See appendix Near-road site 2 January 2015 See appendix
O3 Monitor in Indian Springs June 2014 

### This site will fill a spatial gap for O 3 

### monitoring and could provide insight into transport O3 Monitor in Logandale June 2014 

### This site will fill a spatial gap for O 3 

### monitoring O3 Monitor at Spring Mountain Youth Camp May 2015 

### This site will be an upper-elevation O 3 

### research site O3 Monitor at Green Valley Site January 2015 See Green Valley Site information in Section 4

Winterwood Site January 2016 This site may produce data redundant with Jerome Mack. The proposed closing will follow requirements outlined in 40 CFR 58.14

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 45 

### Figure 62: Indian Springs (Proposed SPM Site).

This proposed site approximately 45 miles northwest of Las Vegas was part of a summer study in 2010. Based on the 2010 Five-Year Network Assessment and previous monitoring data, this site appears to fill a spatial gap for O 3 

### monitoring and could help identify high-O 3 

### areas in Clark County. This site may also provide high-O 3 

### triangulation between Joe Neal and the Las Vegas Paiute Trib e site that came on line in 2013.

Local Site Name (AQS ID) Indian Springs (32-003-7772) GPS Coordinates (latitude, longitude) +36.569333°, -115.676651° Street Address 668 Gretta Ln., Indian Springs, NV Distance to roadway (m) 100 Traffic count (AADT, yr) < 1,000 (2013) Ground cover Native desert Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC O3, 1
Parameter code 44201 Basic monitoring objective(s) Research support Site type(s) Regional transport Monitor type(s) Special purpose
Instrument manufacturer & model TAPI 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other FEM Collecting agency DAQ Analytical lab NA Reporting agency DAQ

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 46 Pollutant, POC O3, 1 Spatial scale Regional Monitoring start date 2014 Current sampling frequency NA Calculated sampling frequency NA Sampling season Year-round Probe height (m) 5 (anticipated) Distance from supporting structure (m) 2 (anticipated) Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) 5 estimated Obstruction not on roof height (m) 4 estimated Distance from trees (m) NA Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) NA Will there be changes within the next 18 months? (Y/N) Y (O 3 installation) Is it suitable for comparison against the annual PM2.5? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily (anticipated) Last annual performance evaluation for gaseous parameters NA
Last two semiannual flow rate audits for PM monitors NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 47 

### Figure 73: Logandale (Proposed SPM Site).

This proposed site is approximately 50 miles northeast of Las Vegas. The site is expected to fill a spatial gap for O 3 

### monitoring, and could provide insight into transport.

Local Site Name (AQS ID) Logandale (TBD) GPS Coordinates (latitude, longitude) +36.605988°, -114.473948° Street Address 3570 Lyman Street, Logandale, NV Distance to roadway (m) 61 Traffic count (AADT, yr) 200 (2013) Ground cover Native desert Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC O3, 1
Parameter code 44201 Basic monitoring objective(s) Research support Site type(s) Regional transport Monitor type(s) Special purpose
Instrument manufacturer & model TAPI 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other FEM Collecting agency DAQ Analytical lab NA Reporting agency DAQ

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 48 Pollutant, POC O3, 1 Spatial scale Regional Monitoring start date 2014 Current sampling frequency NA Calculated sampling frequency NA Sampling season Year-round Probe height (m) 5 (anticipated) Distance from supporting structure (m) 2 (anticipated) Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) 7 estimated Obstruction not on roof height (m) 5 estimated Distance from trees (m) NA Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) NA Will there be changes within the next 18 months? (Y/N) Y (O 3 installation) Is it suitable for comparison against the annual PM2.5? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily (anticipated) Last annual performance evaluation for gaseous parameters NA
Last two semiannual flow rate audits for PM monitors NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 49 

### Figure 84: Spring Mountain Youth Camp (Proposed SPM Site).

This proposed site approximately 30 miles northwest of Las Vegas will be an upper-elevation O 3 

### research site.

Local Site Name (AQS ID) Spring Mountain Youth Camp (32-003-7771) GPS Coordinates (latitude, longitude) + 36.318889 °, - 115.585278 ° Street Address 2400 Angel Peak Place Distance to roadway (m) 30 Traffic count (AADT, yr) 300 (2013) Ground cover Gravel, concrete Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC O3, 1
Parameter code 44201 Basic monitoring objective(s) Research support Site type(s) Regional transport Monitor type(s) Special purpose
Instrument manufacturer & model TAPI 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other Other Collecting agency DAQ Analytical lab NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 50 Pollutant, POC O3, 1 Reporting agency DAQ Spatial scale Regional Monitoring start date 2015 Current sampling frequency NA Calculated sampling frequency NA Sampling season Year-round Probe height (m) 5 (anticipated) Distance from supporting structure (m) 1 (anticipated) Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) 1 estimated Obstruction not on roof height (m) 5 estimated Distance from trees (m) NA Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 180 Probe material for reactive gases Teflon Residence time for reactive gases (s) NA Will there be changes within the next 18 months? (Y/N) Y (O 3 installation) Is it suitable for comparison against the annual PM2.5? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily (anticipated) Last annual performance evaluation for gaseous parameters NA
Last two semiannual flow rate audits for PM monitors NA

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 51 

### Figure 95: Near-Road Site 1.

This proposed near-road monitoring location is at the southeast side of the intersection between South RanchoDrive and Teddy Drive in Las Vegas. This will be the first near-road monitor DAQ deploys. The near-road approval request package (including the tentative EPA approval letter) is attached to this plan.

Local Site Name (AQS ID) Teddy and Rancho (TBD) GPS Coordinates (latitude, longitude) +36.139822°, -115.175565° Street Address 2755 S. Rancho Drive, Las Vegas, NV Distance to roadway (m) 15 Traffic count (AADT, yr) 260,000 (2012) Ground cover Unpaved Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC NO 2 , 1
Parameter code 42602 Basic monitoring objective(s) NAAQS comparison Site type(s) Highest concentration Monitor type(s) SLAMS
Instrument manufacturer & model TAPI 200 series

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 52 Pollutant, POC NO 2 , 1
Method code RFNA-1194-099
FRM/FEM/ARM/other FRM Collecting agency DAQ Analytical lab NA Reporting agency DAQ Spatial scale Microscale Monitoring start date 2014 Current sampling frequency Continuous Calculated sampling frequency Continuous Sampling season Year-round Probe height (m) 4 (anticipated) Distance from supporting structure (m) >1 (anticipated) Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) NA Obstruction not on roof height (m) NA Distance from trees (m) NA Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) NA Will there be changes within the next 18 months? (Y/N) Y (site installation) Is it suitable for comparison against the annual PM2.5? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily (anticipated) Last annual performance evaluation for gaseous parameters NA
Last two semiannual flow rate audits for PM monitors NA


## DAQ has secured a lease agreement with the city of Las Vegas, and anticipates construction in mid2014. Meteorological measurements will include wind speed, wind direction, ambient temperature, and barometric pressure.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 53 

### Figure 106: Near-Road Site 2.

This proposed site is located southeast of E. Bonanza Road and N. Veterans Memorial Drive, in the Central FireStation parking lot. It is anticipated this will be the second near-road monitor DAQ deploys. The near-road approval request package is attached to this plan.

Local Site Name (AQS ID) Central Fire Station (TBD) GPS Coordinates (latitude, longitude) +36.174365°, -115.139770° Street Address 500 N. Casino Center Boulevard, Las Vegas, NV Distance to roadway (m) 15 Traffic count (AADT, yr) 177,000 (2012) Ground cover Paved Representative statistical area name Las Vegas-Paradise, NV MSA

Pollutant, POC NO2, 1
Parameter code 42602 Basic monitoring objective(s) NAAQS comparison Site type(s) Highest concentration Monitor type(s) SLAMS
Instrument manufacturer & model TAPI 200 series
Method code RFNA-1194-099
FRM/FEM/ARM/other FRM Collecting agency DAQ Analytical lab NA Reporting agency DAQ Spatial scale Microscale

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 54 Pollutant, POC NO2, 1 Monitoring start date 2015 Current sampling frequency Continuous Calculated sampling frequency Continuous Sampling season Year-round Probe height (m) 4 (anticipated) Distance from supporting structure (m) >1 (anticipated) Distance from obstructions on roof (m) NA Distance from obstructions not on roof (m) 2 Obstruction not on roof height (m) 3 Distance from trees (m) NA Distance to furnace or incinerator flue (m) NA Distance between collocated monitors (m) NA Unrestricted airflow (degrees) 360 Probe material for reactive gases Teflon Residence time for reactive gases (s) NA Will there be changes within the next 18 months? (Y/N) Y (site installation) Is it suitable for comparison against the annual PM2.5? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily (anticipated) Last annual performance evaluation for gaseous parameters NA
Last two semiannual flow rate audits for PM monitors NA


## DAQ is securing a lease agreement with the city of Las Vegas, and anticipates construction to commence by the close of 2014. Meteorological measurements will include wind speed, wind direction, ambient temperature, and barometric pressure.

7.3 Review Process for Network Modifications
The annual network plan outlines all notices of proposed changes, in compliance with 40 CFR 58.10 (a)(2). DAQ will provide time for a public review when a violating PM 2.5 

## monitor is being discontinuedor when proposing to reduce any SLAMS monitoring. DAQ will post all notices and documents for public review on its Web site.
7.4 Near-road Monitoring

In March 2013, EPA revised 40 CFR 58 to extend the deadline for commencement of near-road NO 2 

## monitoring to January 1, 2014. Using guidance in EPA’s June 2012 Near-Road Technical Assistance Document(TAD), DAQ identified and proposed a location at the southeast side of the intersection between S. Rancho Drive and Teddy Drive (Site 1). It submitted a site proposal to EPA on January 6,2014, which is appended to this plan (see Appendix A and Section 7.2). A 30-day public comment period ran from January 9–February 9, 2014, and no comments were received.

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 55 

## Agencies must establish a second near-road monitor for CBSAs with a population of 2.5 million or more, or with a population of 500,000 or more and one or more roadway segments with AADT counts of 250,000 or above, which must be operational no later than January 1, 2015. Clark County meets this threshold; therefore, DAQ has proposed a second location (Site 2), which sits in one of the valley’s highest traffic areas and where traffic is congested at least twice per day. Predominant wind flow brings transport from the resort corridors on I-15 and S. Las Vegas Boulevard (Las Vegas Strip), as well asroadside emissions from U.S. Highway 95. Since the site is within 20 m of U.S. 95, it may also be suitable for microscale monitoring. Detailed information related to this second proposed near-road site is appended to this network plan (see Appendix B and Section 7.2).
40 CFR 58 requires one CO monitor to be placed at a near-road site. DAQ anticipates having a monitor operational by January 1, 2017, as required. EPA will also require near-road PM 2.5 

## monitoring beginning January 1, 2017. DAQ anticipates having a monitor operational by January 1, 2017, as required.
7.5 Special Purpose Studies
During the summer of 2013, DAQ commissioned a study at Angel Peak that used lidar technology to characterize stratospheric intrusions. The National Oceanic and Atmospheric Administration carried out the study, which demonstrated such stratospheric intrusions may occasionally occur in the Southwest.
At the request of EPA’s Office of Air Quality Planning and Standards, DAQ is taking part in the SunsetElemental Carbon/Organic Carbon evaluation project. A semicontinuous carbon sampler has been installed at the Jerome Mack NCore station and is expected to run for three years. DAQ is now formatting data to be loaded into AQS.

7.6 Future Needs
Through special studies, modeling, forecasting, and a network assessment, DAQ has projected spatial gaps and high pollutant concentrations in specific areas of Clark County. It has identified potential O 3 

## monitoring sites in Coyote Springs, Primm, and Overton and potential PM 10 

## sites in southwest areas of the Las Vegas Valley. Future sites will likely be started as SPM.
DAQ will redeploy the Spring Mountain Youth Camp (AQS 32-003-7771) and other upper-elevation O 3

## research sites in 2015 and beyond, to be operated as SPMs (40 CFR 58.20(a)). Due to physical limitations and restrictive conditions, DAQ will not operate these O 3 

## monitors in compliance with FRM orFEM requirements, and it will designate related data as nonregulatory. Upper-elevation restrictions include, but are not limited to, modified instrument configurations, operations outside instrument design specifications, deviations from QA and QC frequencies, and siting limitations.
The altitude of prospective sites will cause deviations in the allowable tolerances of O 3 

## instruments, possibly breaching FRM or FEM designations. Because of these limitations, DAQ cannot fully comply with40 CFR 58.11, 58.12, Appendix A, or Appendix E. Therefore, DAQ intends to operate these upper elevation O 3 

## research instruments as SPM, non-FRM, and non-FEM.
One of the main FEM requirements is to comply with testing procedures for the specific pollutant (40 CFR 53.3(b)). For O 3 

## , the setup and start-up of the test analyzer, test samplers, and reference method

### Clark County, Nevada: Annual Monitoring Network Plan Report

Page | 56 

## must be in strict accordance with the manufacturer’s operation manuals. Since the regulation leaves noroom for even minor deviations from the manual’s specifications (40 CFR 53.32(d)(1)), DAQ upperelevation O 3 

## research sites will not comply with FRM or FEM requirements.
DAQ plans to contribute to the goals of the Clean Air Act and the evolving science of air quality. Some of its objectives are to research pollutant and precurs or transport, identify stratospheric intrusions and mixing heights, and conduct model validation. A majority of this research will be conducted during the O 3 

## season, and these upper-elevation research monitors will not be part of the regulatory monitoring network.