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 PM2.5 ...........................................................................................................................2

2.3 PM10 ............................................................................................................................3

2.4 NO2 .............................................................................................................................3

2.5 SO2 ..............................................................................................................................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: O3 Monitors. ..............................................................................................................36

Figure 17: NOx Monitors. ...........................................................................................................38

Figure 18: SO2 Monitors. ...........................................................................................................39

Figure 19: Continuous PM10 Monitors. ......................................................................................40
Clark County, Nevada: Annual Monitoring Network Plan Report 

iv 

Figure 20: Continuous PM2.5 Monitors. .....................................................................................41

Figure 21: Filter-Based PM2.5 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 PM2.5 ..........................................................2

Table 3. Minimum Monitoring Requirements for PM10 ...........................................................3

Table 4. Minimum Monitoring Requirements for NO2 ............................................................3

Table 5. Minimum Monitoring Requirements for SO2 .............................................................3

Table 6. Minimum Monitoring Requirements for CO ..............................................................4

Table 7. Minimum Monitoring Requirements for Pb at NCore ................................................4

Table 8. Filter-Based PM2.5 FRM Network ..............................................................................5

Table 9. Continuous PM2.5 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 air 

monitoring 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 PM10, ozone (O3), carbon monoxide (CO), nitrogen oxides (NO, NO2, NOx, NOy), sulfur dioxide (SO2), 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 O3, PM2.5/PM10,

CO, NO2, SO2, 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 O3, PM2.5, CO, and NO2 NAAQS and 

“unclassifiable” for SO2 and Pb. The Las Vegas Valley (Hydrographic Area 212) within Clark County is 

classified as a “serious nonattainment area” for PM10. The area had attained the PM10 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 PM10, 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 Report 

Section 2: Minimum Monitoring Requirements The tables below show that the Clark County air quality network meets or exceeds the 2013 minimum requirements of Title 40, ParPage | 2 

t 58 of the 

Code of Federal Regulations (40 CFR 58). 2.1 Ozone Table 1. Minimum Monitoring Requirements for Ozone 

MSA1 County Population & Census Year 8-hr Design Value [ppb], DV Years2 Design Value site (name, AQS ID3) # Required Monitors # Active Monitors # Add’l Monitors Needed 

Las Vegas-Paradise 

(29820) Clark, NV 2,000,759 (2012) 77, 2011-13 Joe Neal (32-003-0075) 2 11 0 

1 Metropolitan Statistical Area. 2 DV Years = the three years over which the design value was calculated (e.g., 2011-2013). 3 Air Quality System (site) Identification. Monitors required for SIP or maintenance plan: NA This network meets the minimum monitoring requirement for the referenced criteria pollutant. 2.2 PM2.5Table 2. Minimum Monitoring Requirements for PM2.5

MSA County Pop. & Census Yr Annual Design Value [ȝg/m3], DV Years1 Annual Design Value Site (name, AQS ID) Daily Design Value [ȝg/m3], DV years Daily Design Val- ue Site (name, AQS ID) # Required SLAMS Monitors # Active SLAMS Monitors # Add’l SLAMS Monitors Need- ed 

Las VegasParadise 

(29820) 

Clark, 

NV 

2,000,759 

(2012) 8.8, 2011-13 Sunrise Acres (32-003-0561) 23, 2011-13 Sunrise Acres (32-003-0561) 2 8 + colloca- tion 0 

1DV 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 value 

determination. 

Monitors required for SIP or maintenance plan: NA This network meets the minimum monitoring requirement for the referenced criteria pollutant. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

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2.3 PM10Table 3. Minimum Monitoring Requirements for PM10

MSA County Pop. & Census Year Max. Concentration in 2013 [ȝg/m3] Max. Conc. Site (name, AQS ID) # Req’d Monitors # Active Moni- tors # Add’l Monitors Needed 

Las VegasParadise 

(29820) 

Clark, NV 2,000,759 (2012) 267 Sunrise Acres (32-003-0561) 6-10 9 0 

Monitors required for SIP or maintenance plan: NA This network meets the minimum monitoring requirement for the referenced criteria pollutant. 2.4 NO2Table 4. Minimum Monitoring Requirements for NO2

CBSA1 Pop. & Cen- sus Year Max AADT Counts (2012) # Req’d Near-road Monitors # Active Near-road Monitors # Add’l Near-road Monitors Needed # Req’d Area- wide Monitors # Active Ar- ea wide Monitors # Add’l Area-wide Monitors Needed 

Las Vegas-ParadisePahrump (332) 2,000,759 (2012) 260,000 1 0 1 1 2 0 

1 Core-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 40 

CFR 58, App. D, Sec. 4.3.4: 1 Monitors required for Photochemical Assessment Monitoring Station: NA One near-road NO2 monitor is expected to commence in 2014. 

2.5 SO2Table 5. Minimum Monitoring Requirements for SO2

CBSA County Pop. & Census Year Total SO21 [tons/yr] Pop. Weighted Emissions Index2 [million persons-tons/yr] # Req’d Moni- tors # Active Monitors # Add’l Moni- tors Needed 

Las Vegas-ParadisePahrump (332) Clark, NV 2,000,759 (2012) 7,179 14,364 (est.) 1 1 0 
Clark County, Nevada: Annual Monitoring Network Plan Report 

1Using 2011 NEI data. 2Calculated by multiplying CBSA population and total SOPage | 4 

2 and dividing product by one million. 

Population Weighted Emissions Index requirements met. Monitors required for SIP or maintenance plan: NA EPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.4.3: 0 

This network meets the minimum monitoring requirement for the referenced criteria pollutant. 

2.6 COTable 6. Minimum Monitoring Requirements for CO 

CBSA Pop. & Census Year # Req’d Near-Road Monitors # Active Near-Road Monitors # Add’l Monitors Needed 

Las Vegas-Paradise-Pahrump 

(332) 2,000,759 (2012) 0 0 0 

Monitors required for SIP or maintenance plan: NA EPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.2.2: 0 This 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 identified sources that might trigger this requirement, and a preliminary assessment has shown no such sources within Clark County. Therefore, DAQ does not conduct source-oriented Pb monitoring.Table 7. Minimum Monitoring Requirements for Pb at NCore 

NCore Site 

(name, AQS ID) CBSA Pop. & Census Year # Req’d Monitors # Active Monitors # Add’l Monitors Needed 

Jerome Mack Middle School 

(32-003-0540) 

Las Vegas-ParadisePahrump (332) 2,000,759 (2012) 1 1 0 

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 Report 

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Section 3: Collocated Monitors as of 2014 Table 8. Filter-Based PM2.5 FRM Network 

Method Code # Primary Monitors, Site # Required Collocated Monitors # Active Collocated Monitors

RFPS-0498-118 3: Sunrise Acres, Jean and Jerome Mack 1 1 QA collocated 

DAQ has upgraded its entire PM2.5 FRM network to Thermo Scientific Model 2025i (Method RFPS-0498-118) sampler. Table 9. Continuous PM2.5 FEM Network 

Method Code # Primary Monitors, Site # Required Collocated Monitors # Active Collocated FRM Monitors # Active Collocated FEM Monitors (same method designation as primary) 

EQPM-0609-183 4: J.D. Smith, Green Val- ley, Sunrise Acres, Jean 1 1 0 EQPM-0308-170 1, Jerome Mack 1 1 0 

Appendix A of 40 CFR 58 requires 15% of PM2.5 FRM and FEM samplers in a network to be collocated. For the PM2.5 FRM network (method RFPS-0498-118), the collocated sampler is located at the Jerome Mack (NCore) site. For the PM2.5 FEM network (methods EQPM-0609-

183 and EQPM-0308-170), the collocated samplers are located at Sunrise Acres and Jerome Mack, respectively. This collocation arrangement meets the Appendix A requirement. All but two DAQ sites with continuous PM2.5 FEM monitors have a collocated PM2.5 FRM sampler. The exceptions are J.D. Smith and Green 

Valley, where the continuous FEM monitor is the only PM2.5 instrument on site. The PM2.5 FEM monitor at Sunrise Acres serves as the site’s 

primary PM2.5 monitor. The Jerome Mack PM2.5 FEM monitor is part of the PM Coarse system. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

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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 O3 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 O3, 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 

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Pollutant, POC O3, 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 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 

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. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

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Figure 2: Boulder City. 

This site, approximately 25 miles southeast of Las Vegas, was established at the request of Boulder City government officials and residents to serve as an indicator of population exposure to pollutants, particularly O3 and PM10. 

Local Site Name (AQS ID) Boulder City (32-003-0601) 

GPS Coordinates (latitude, longitude) +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 

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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.
Clark County, Nevada: Annual Monitoring Network Plan Report 

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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 PM10 and PM2.5. 

Local Site Name (AQS ID) Green Valley (32-003-0298) 

GPS Coordinates (latitude, longitude) +36.048611°, -115.052778° 

Street Address 298 Arroyo Grande 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 PM10, 1 PM2.5 (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 

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Pollutant, POC PM10, 1 PM2.5 (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 

PM2.5? (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 O3 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 O3 monitor in the city of Henderson, the monitor would represent the neighborhood 

(spatial scale), and the monitor would meet the objective of population exposure.
Clark County, Nevada: Annual Monitoring Network Plan Report 

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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 (NO2, CO, 

and O3) and particulate (PM10 and PM2.5) 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 PM10, 1 CO, 1 NO2, 1 O3, 1 PM2.5 (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 

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Pollutant, POC PM10, 1 CO, 1 NO2, 1 O3, 1 PM2.5 (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-round Year-round Year-round Year-round 

Probe height (m) 4.6 3.7 3.7 3.7 4.6 

Distance 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 PM2.5? 

(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 

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Pollutant, POC PM10, 1 CO, 1 NO2, 1 O3, 1 PM2.5 (cont.), 3 

Frequency 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 Vegas. 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 PM10, 1 PM2.5 (FRM), 1 O3, 1 PM2.5 (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 

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Pollutant, POC PM10, 1 PM2.5 (FRM), 1 O3, 1 PM2.5 (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 Year-round Year-round Year-round 

Probe height (m) 4.4 2.1 3.9 4.6 

Distance 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) 360 360 360 360 

Probe 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 PM2.5? (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. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 17 

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 PM2.5, 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 PM2.5 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 MSA 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Pollutant, POC PMPage | 18 

10, 3 PM2.5 (cont.), 3 PM10-2.5 (cont.), 3 PM2.5 (FRM), 1 Speciation SASS, 5 Speciation URG, 5 O3, 1 NOY, 1 Trace CO, 1 Trace SO2, 1 Pb, 1 

Parameter code 81102 88101 86101 88101 88502 88355 44201 42600 42101 42401 14129 Basic monitoring objective(s) 

NAAQS 

comparison 

NAAQS 

comparison 

Research 

support 

NAAQS 

comparison 

Research 

support 

Research 

support 

NAAQS 

comparison

Research 

support 

Research 

support 

NAAQS 

comparison

NAAQS 

comparison 

Site type(s) Population exposure Population exposure Population exposure Population exposure Population exposure Population exposure Population exposure Population exposure Population exposure Population exposure Population exposure Monitor type(s) NCore NCore NCore NCore NCore NCore NCore NCore NCore NCore NCore Instrument manufacturer & model Metone BAM 1020 Metone BAM 1020 

Metone 

BAM 1020 

(mathematical difference) Thermo 2025i Met One SASS URG 3000 TAPI 400 series TAPI 200EU TAPI 300EU TAPI 100EU American Ecotech HiVol 3000 

Method code EQPM- 0798-122 EQPM- 0308-170 EQPM- 0709-185 RFPS-0498- 118 NA NA EQOA- 0992-087 NA RFCA- 1093-093 EQSA- 0495-100 EQL- 0510-191 FRM/FEM/ARM/other 

FEM FEM FEM FRM Other Other FEM Other FRM FEM FEM 

Collecting agency DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ Analytical lab NA NA NA Weigh RTI RTI NA NA NA NA RTI Reporting agency DAQ DAQ DAQ DAQ RTI RTI DAQ DAQ DAQ DAQ DAQ Spatial scale Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Urban Neighbor- hood Neighbor- hood Neighbor- hood Monitoring start date 01/01/2012 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 01/01/2012 Current sampling frequency Continuous Continuous Continu- ous 1:3 1:3 1:3 Continuous Continuous Continuous Continuous 1:6 Calculated sampling frequency Continuous Continuous Continu- ous 1:3 1:3 1:3 Continuous Continuous Continuous Continuous 1:6 Sampling season Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Probe height (m) 5.1 5.1 5.1 3.1 2.8 3.1 4.1 6.9 4.1 4.1 2.2 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 19 

Pollutant, POC PM10, 3 PM2.5 (cont.), 3 PM10-2.5 (cont.), 3 PM2.5 (FRM), 1 Speciation SASS, 5 Speciation URG, 5 O3, 1 NOY, 1 Trace CO, 1 Trace SO2, 1 Pb, 1 Distance from supporting structure (m) 

2.1 2.1 2.1 2.1 1.8 2.2 1.1 7.0 1.1 1.1 1.3 

Distance from obstructions on roof (m) 

NA NA NA NA NA NA NA NA NA NA NA 

Distance from obstructions not on roof (m) 

NA NA NA 5.9 5.6 4.0 NA NA NA NA 7.7 

Obstruction (shelter) not on roof height (m) 

NA NA NA 3.1 3.1 3.1 NA NA NA NA 3.1 

Distance from trees (m) 19.3 20.1 NA 24.8 22.9 22.5 19.0 17.7 19.0 19.0 26.0 Distance to furnace or incinerator flue (m) 

NA NA NA NA NA NA NA NA NA NA NA 

Distance between collocated monitors (m) 

2.7 2.7 NA 2.9 2.3 2.3 NA NA NA NA NA 

Unrestricted airflow (degrees) 

360 360 360 360 360 360 360 360 360 360 360 

Probe material for reactive gases NA NA NA NA NA NA Teflon Teflon Teflon Teflon NA Residence time for reactive gases (s) NA NA NA NA NA NA 2.6 NA 1.0 3.1 NA Will there be changes within the next 18 months? (Y/N) 

N N N N N N N N N N N 

Is it suitable for comparison against the annual PM2.5? 

(Y/N) 

N Y N Y N N N N N N N 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Pollutant, POC PMPage | 20 

10, 3 PM2.5 (cont.), 3 PM10-2.5 (cont.), 3 PM2.5 (FRM), 1 Speciation SASS, 5 Speciation URG, 5 O3, 1 NOY, 1 Trace CO, 1 Trace SO2, 1 Pb, 1 

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

Biweekly Biweekly Biweekly NA NA NA NA NA NA NA NA 

Frequency of onepoint QC check for gaseous instruments NA NA NA NA NA NA Daily Daily Daily Daily NA Last annual performance evaluation for gaseous parameters 

NA NA NA NA NA NA 10/23/2013 12/31/2013 12/18/2013 12/31/2013 NA 

Last two semiannual flow rate audits for PM monitors 03/15/2013; 08/15/2013 03/15/2013; 08/15/2013 NA 03/07/2013; 06/28/2013; 08/13/2013; 11/13/2013 03/25/2013; 06/21/2013; 08/13/2013; 12/05/2013 03/25/2013; 06/21/2013; 08/13/2013; 12/05/2013 NA NA NA NA 03/27/2013; 05/17/2013; 08/13/2013; 11/13/2013 Meteorological 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 O3 and its precursors in an area of high 

O3 concentrations, and to support DAQ modeling efforts. The topography is such that the summertime loft brings 

higher O3 and precursor levels toward this site from the east end of the Las Vegas Valley. PM10 was initially deployed at this site due to population growth in the northwest, and the site continues to serve as a high O3 indicator. A NOx monitor was added in January 2008 to monitor for O3 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 PM10, 1 O3, 1 NO2, 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 PM10, 1 O3, 1 NO2, 1

Instrument manufacturer & model Thermo FH62C14 API 400 series API 200 series 

Method code EQPM-1102-150 EQOA-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 PM2.5? (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 O3. It sits along a transport and exit corridor for 

jurisdictional boundaries, and serves as an indicator of population exposure to pollutants. Mesquite is an EPAapproved seasonal O3 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 O3, 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 O3, 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 PM2.5? (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 O3 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 O3 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 O3, but it also monitors PM10. The topography is 

such that the summertime loft brings higher O3 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 PM10, 1 O3, 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 PM10, 1 O3, 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 PM2.5? (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 O3, but it also monitors PM10. The topography is such that the summertime loft brings higher O3 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 PM10, 1 O3, 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 PM10, 1 O3, 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 PM2.5? (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 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 transferred here when that lease was terminated. The site’s primary objective is to monitor CO and PM; it monitors PM10, and PM2.5 using both filter-based and continuous 

methodologies. Beginning 2014, the PM2.5 FEM will be the primary monitor at this site, and it will be collocated 

with a PM2.5 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 PM10, 1 CO, 1 PM2.5 (FRM), 1 PM2.5 FRM

Collocated, 2

PM2.5

(cont.), 3 NO2, 1 

Parameter code 81102 42101 88101 88101 88101 42602 

Basic 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 PM10, 1 CO, 1 PM2.5 (FRM), 1 PM2.5 FRM

Collocated, 2

PM2.5

(cont.), 3 NO2, 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 Continuous 

Calculated 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 

PM2.5. 

Yes. This 

sampler will 

move to 

Jerome Mack 

for FRM collocation. 

Yes. This will 

become the 

primary monitor 

for PM2.5. 

N 

Is it suitable for comparison 

against the annual PM2.5? 

(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 PM10, 1 CO, 1 PM2.5 (FRM), 1 PM2.5 FRM

Collocated, 2

PM2.5

(cont.), 3 NO2, 1 

Frequency of flow rate verification for automated PM 

analyzers 

Biweekly NA NA NA Biweekly NA 

Frequency of one-point QC 

check 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 O3. The topography is such that the 

summertime loft brings high O3 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 O3, 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 O3, 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 PM2.5? (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 O3, 

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 O3, 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 O3, 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 frequency 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 PM2.5? (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: O3 Monitors. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 38 

Figure 17: NOx Monitors. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 39 

Figure 18: SO2 Monitors. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 40 

Figure 19: Continuous PM10 Monitors. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 41 

Figure 20: Continuous PM2.5 Monitors. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 42 

Figure 21: Filter-Based PM2.5 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 O3, NO2 9/19/13 

Winterwood O3, CO 9/20/13 

Jerome Mack O3, CO, SO2 9/23/13 

Each year, the PM2.5 FRM sampling network undergoes a Performance Evaluation Program (PEP) audit. 

PEP audit results (in ȝg/m3

) are generated and submitted to the AQS database. 

Table 11. 2013 PEP Audit Activity 

Sampler Location Pollutant Audit Date

Sunrise Acres, Jean PM2.5 (FRM) 2/06/13 

Sunrise Acres, Jean PM2.5 (FRM) 4/10/13 

Jerome Mack PM2.5 (FRM) 7/15/13 

Jean PM2.5 (FRM) 12/06/13 
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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 PM2.5 monitor at Jean 04/01/2013 Upgraded from non-designated PM2.5 to PM2.5 FEM 

Replaced continuous PM2.5 monitor at J.D. Smith 01/01/2013 Upgraded from non-designated PM2.5 to PM2.5 FEM 

Replaced continuous PM2.5 monitor at Green Valley 10/01/2013 Upgraded from non-designated PM2.5 to PM2.5 FEM 

Added NO2 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 Equipment 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 O3 monitoring and 

could provide insight into transport

O3 Monitor in Logandale June 2014 This site will fill a spatial gap for O3 monitoring 

O3 Monitor at Spring Mountain Youth Camp May 2015 This site will be an upper-elevation O3 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 

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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 O3

monitoring and could help identify high-O3 areas in Clark County. This site may also provide high-O3 triangulation 

between Joe Neal and the Las Vegas Paiute Tribe 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 

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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 (O3 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 

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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 

O3 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 

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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 (O3 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 

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

This proposed site approximately 30 miles northwest of Las Vegas will be an upper-elevation O3 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 

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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 (O3 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 

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Figure 95: Near-Road Site 1. 

This proposed near-road monitoring location is at the southeast side of the intersection between South Rancho 

Drive 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 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 
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Pollutant, POC NO2, 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 

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Figure 106: Near-Road Site 2. 

This proposed site is located southeast of E. Bonanza Road and N. Veterans Memorial Drive, in the Central Fire 

Station 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 

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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 PM2.5 monitor is being discontinued 

or 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 NO2

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 

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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 as 

roadside 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 PM2.5 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 Sunset 

Elemental 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 O3

monitoring sites in Coyote Springs, Primm, and Overton and potential PM10 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 O3

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 O3 monitors in compliance with FRM or 

FEM 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 O3 instruments, possibly breaching FRM or FEM designations. Because of these limitations, DAQ cannot fully comply with 

40 CFR 58.11, 58.12, Appendix A, or Appendix E. Therefore, DAQ intends to operate these upper elevation O3 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 O3, the setup and start-up of the test analyzer, test samplers, and reference method 
Clark County, Nevada: Annual Monitoring Network Plan Report 

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must be in strict accordance with the manufacturer’s operation manuals. Since the regulation leaves no 

room for even minor deviations from the manual’s specifications (40 CFR 53.32(d)(1)), DAQ upperelevation O3 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 precursor transport, identify stratospheric intrusions and 

mixing heights, and conduct model validation. A majority of this research will be conducted during the 

O3 season, and these upper-elevation research monitors will not be part of the regulatory monitoring 

network.