Clark County, Nevada: Annual Monitoring Network Plan Report 

 

Annual Monitoring Network Plan Report 

June 2013 

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 5/23/2013 

Executive Summary 

This document reports the status of the Clark County air monitoring network in 2012, as required by 

Title 40, Part 58 of the Code of Federal Regulations. It describes network operation in 2012, changes 

planned for 2013–2014, 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 

5/23/2013 iii 

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 ................................................................................................................5

Section 4: Site Tables ...............................................................................................................................6

Section 5: Maps of Criteria Pollutant Monitoring Stations in 2012 ......................................................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 .............................................................44

7.4 Near-road Monitoring ...............................................................................................45

7.5 Special Purpose Sites ................................................................................................45

7.6 Future Needs .............................................................................................................48

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. ..............................................................................................................37

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

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

Figure 19: Continuous PM10 Monitors. ......................................................................................40

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

Figure 21: Filter-Based PM2.5 Sampler. .....................................................................................42
Clark County, Nevada: Annual Monitoring Network Plan Report 

iv 5/23/2013 

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. 2012 NPAP and TTP Evaluations .............................................................................43

Table 11. 2012 PEP Audit Activity ..........................................................................................43

Table 12. Summary of 2012 Network Modifications ...............................................................44

Table 13. Proposed Site and Equipment Terminations, 2012–2014 .........................................44

Table 14. Proposed Site and Equipment Installations, 2012–2014...........................................44

Table 15. Spring Mountain Youth Camp ..................................................................................47

Table 16. Arden Peak ................................................................................................................47

Table 17. Frenchman Mountain ................................................................................................47

Table 18. Laughlin ....................................................................................................................48

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 

SLAMS State/Local Air Monitoring System 

TTP through-the-probe 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 Page | 1 

Section 1: Introduction 

This report serves as a review of the current Clark County Department of Air Quality (DAQ) air monitoring network and a plan for future network activities. During 2012, 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 as a special project. 

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. 

Currently, Clark County meets the O3, PM2.5, CO, and NO2 NAAQS, and is 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. 

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 

Page | 2 Section 2: Minimum Monitoring Requirements The tables below show that the Clark County air quality network meets or exceeds the minimum requirements of Tit

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 # 

Las VegasParadise (29820) Clark, NV 1,969,975 (2011) 76, 2010-12 Joe Neal (32-003-0075) 2 11 Las VegasParadise (29820) Clark, NV 1,969,975 (2011) 76, 2010-12 Walter Johnson (32-003-0071) 2 11 

1 Metropolitan Statistical Area. 2 DV Years = the three years over which the design value was calculated (e.g., 2010-2012). 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 [μg/m3], DV Years1 Annual Design Value Site (name, AQS ID) Daily Design Value [μg/m3], DV years Daily Design Value Site (name, AQS ID) # Required SLAMS Monitors # Acti

SLAM

Monito

Las VegasParadise 

(29820) 

Clark, 

NV 

1,969,975 

(2011) 7.7, 2010-12 Sunrise Acres (32-003-0561) 21, 2010-12 Sunrise Acres (32-003-0561) 2 4 + coll

tion 

1DV Years = the three years over which the design value was calculated (e.g., 2010-2012). 2This applies to all non-federal reference method (FRM) or -federal equivalence method (FEM) designated instruments, or when there is not enough FRM or F

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 

5/23/2013 2.3 PM10 Table 3. Minimum Monitoring Requirements for PM10

MSA County Pop. & Census Year Max. Concentration in 2012 [μg/m3] Max. Conc. Site (name, AQS ID) # Req’d Monitors # Active Monitors # Add’l Monito

Needed 

Las VegasParadise 

(29820) 

Clark, NV 1,969,975 (2011) 314 Boulder City (32-003-0601) 4-8 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. & Census 

Year 

Max AADT 

Counts 

(yr) 

# Req’d 

Near-road 

Monitors 

# Active 

Near-road 

Monitors 

# Add’l Nearroad Monitors 

Needed 

# Req’d 

Area-wide 

Monitors 

# Active 

Areawide 

Monitors 

# Add’l A

wide Mon

Needed 

Las Vegas-ParadisePahrump (332) 1,969,975 (2011) 6,130 0 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 areawide monitors; Sunrise Acres 

Monitors required for Photochemical Assessment Monitoring Station: NA EPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.3.4: 1 Near-road NO2 monitoring must commence in 2014. 

2.5 SO2Table 5. Minimum Monitoring Requirements for SO2

CBSA County Pop. & Cen- sus Year Total SO21 [tons/yr] Pop. Weighted Emissions Index2 [million persons-tons/yr] # Req’d Monitors # Active Monitors # Add

itors 

Las VegasParadise-Pahrump 

(332) 

Clark, 

NV 

1,969,975 

(2011) 6,725 13,450 (est.) 1 1 

1Using 2008 NEI data. 2Calculated by multiplying CBSA population and total SO2 and dividing product by one million. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 4 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 CO Table 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-ParadisePahrump (332) 1,969,975 (2011) 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 Pb The source emission threshold for the ambient source-oriented Pb monitoring requirement is 0.50 tons per year. DAQ 

sources that might trigger this requirement, and a preliminary assessment has shown no such sources within Clark C

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 VegasParadisePahrump (332) 1,969,975 (2011) 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 

5/23/2013 Section 3: Collocated Monitors Table 8. Filter-Based PM2.5 FRM Network 

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

RFPS-0498-118 1, Sunrise Acres 1 1 QA collocated RFPS-0598-120 2, Jean and Jerome Mack 1 0 

DAQ has two PM2.5 methods operating in its network: the existing Andersen Model 300 (Method RFPS-0598-120), 

Model 2025i (Method RFPS-0498-118). The Andersen Model 300 samplers are well beyond their life expectancy, anported; therefore, DAQ is acquiring, acceptance testing, deploying, and field testing Thermo Model 2025i samplers tnetwork. DAQ anticipates completing this transition in 2013, at which time there will only be one PM2.5 FRM metho

ever, be fully compliant with collocation requirements. 

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 1, J.D. Smith 1 0 0 

Currently, all DAQ sites but one with continuous PM2.5 FEM monitors also have a PM2.5 FRM sampler, which is the 

site. The one exception is J.D. Smith, where the continuous PM2.5 FEM monitor is the only PM2.5 instrument on site. 

requires 15% of PM2.5 instruments to be collocated, both FRMs and FEMs. Since J.D. Smith’s only PM2.5 measurem

thod, it is considered primary and comparable to the NAAQS. J.D. Smith and Sunrise Acres share the same PM2.5 FE

To meet the PM2.5 FEM collocation requirement, DAQ proposes classifying the PM2.5 FEM at Sunrise Acres as the pthat site. The current PM2.5 primary FRM at Sunrise would be moved to Jerome Mack and collocated with a similar Flocated FRM at Sunrise Acres would serve as the collocation for the PM2.5 FEM network, running on a one-in-three-
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Section 4: 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) 2200 (2011) 

Ground cover Native desert 

Representative statistical area name Las Vegas-Paradise MSA 

Pollutant, POC O3, 1 

Parameter code 44201 

Basic monitoring objective(s) NAAQS comparison 

Site type(s) Regional transport 

Monitor type(s) SLAMS 
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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) 1.3 

Distance from obstructions on roof (m) None 

Distance from obstructions not on roof (m) None 

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) 2.3 

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 04/19/2012; 06/18/2012 

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) 1,700 (2011) 

Ground cover Paved, native desert 

Representative statistical area name Las Vegas-Paradise MSA 

4.1 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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4.1 Pollutant, POC PM10, 1 O3, 1

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) 5.2 4.1 

Distance from supporting structure (m) 1.2 1.2 

Distance from obstructions on roof (m) None None 

Distance from obstructions not on roof (m) None None 

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 2.7 

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 04/18/2012; 06/19/2012 

Last two semiannual flow rate audits for PM 

monitors 03/22/2012; 09/21/2012 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) 3,900 (2011) 

Ground cover Paved, gravel 

Representative statistical area name Las Vegas-Paradise MSA 

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

Parameter code 81102 88502 

Basic monitoring objective(s) NAAQS comparison Provide timely air pollution data to public 

Site type(s) Population exposure Population exposure 

Monitor type(s) SLAMS Non-regulatory 

Instrument manufacturer & model Thermo FH62C14 Thermo FH62C14 

Method code EQPM-1102-150 NA 

FRM/FEM/ARM/other FEM Other 

Collecting agency DAQ DAQ 

Analytical lab NA NA 
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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 01/01/2003 

Current sampling frequency Continuous Continuous 

Calculated sampling frequency Continuous Continuous 

Sampling season Year-round Year-round 

Probe height (m) 4.8 4.9 

Distance from supporting structure (m) 1.8 1.9 

Distance from obstructions on roof (m) NA NA 

Distance from obstructions not on roof (m) NA NA 

Distance from trees (m) 6.5 4.0 

Distance to furnace or incinerator flue (m) NA NA 

Distance between collocated monitors (m) 2.5 2.5 

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 Yes, continuous PM2.5 FEM deployment anticipated in place of current instrument 

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 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 03/15/2012; 09/20/2012 03/15/2012; 09/20/2012 

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 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) 7,600 (2011) 

Ground cover Paved, grass 

Representative statistical area name Las Vegas-Paradise 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 Other 

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) 4.7 3.7 3.7 3.7 4.8 

Distance from supporting structure (m) 2.0 1.2 1.2 1.2 2.1 

Distance from obstructions on 

roof (m) NA NA NA NA NA 

Distance from obstructions not 

on roof (m) 

Wall obstruction height: 5.7 

3.3 4.2 4.2 4.2 5.9 

Distance from trees (m) 35 32.8 32.8 32.8 35 

Distance to furnace or 

incinerator flue (m) NA NA NA NA NA 

Distance between collocated 

monitors (m) 2.6 NA NA NA 2.6 

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 

Frequency of flow rate verification for automated PM analyzers 

Biweekly NA NA NA Biweekly 
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 one-point QC 

check for gaseous instruments NA Daily Daily Daily NA 

Last annual performance evaluation for gaseous parameters NA 12/14/2012 12/14/2012 12/04/2012 NA 

Last two semiannual flow rate 

audits for PM monitors 

06/29/2012; 

11/28/2012 NA NA NA 06/29/2012; 

11/28/2012 

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 (2011) 

Ground cover Gravel, native desert 

Representative statistical area name Las Vegas-Paradise MSA 

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

Parameter code 81102 88101 44201 88502 

Basic monitoring objective(s) NAAQS comparison NAAQS comparison NAAQS comparison Provide timely air pollution data to public 

Site type(s) Upwind background Upwind background Regional transport Upwind background 

Monitor type(s) SLAMS SLAMS SLAMS Non-regulatory 

Instrument manufacturer & 

model Thermo FH62C14 Andersen 300 RAAS API 400 series Thermo FH62C14 

Method code EQPM-1102-150 RFPS-0598-120 EQOA-0992-087 NA 

FRM/FEM/ARM/other FEM FRM FEM Other 

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 05/26/2007 

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) 4.8 2.0 4 4.9 

Distance from supporting structure (m) 2.0 2.0 1.4 2.1 

Distance from obstructions on 

roof (m) NA NA NA NA 

Distance from obstructions not 

on roof (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) 2.7 NA NA 2.7 

Unrestricted airflow (degrees) 360 360 360 360 

Probe material for reactive gases 

NA NA Teflon NA 

Residence time for reactive 

gases (s) NA NA 6.2 NA 

Will there be changes within the 

next 18 months? (Y/N) N 

Yes, anticipate deploying Thermo 2025i FRM 

to replace Andersen 

300 

N 

Yes, continuous PM2.5

FEM deployment anticipated in place of 

current instrument 

Is it suitable for comparison 

against the annual PM2.5? (Y/N) N Y N N 

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 12/03/2012 NA 

Last two semiannual flow rate 

audits for PM monitors 

03/15/2012; 

09/20/2012 

03/15; 06/28; 09/20; 

11/30/2012 NA 03/15/2012; 

09/20/2012 

Meteorological measurements include wind speed, wind direction, ambient temperature, solar radiation, 

and barometric pressure. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 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. 

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) 25,000 (2011) 

Ground cover Concrete, grass 

Representative statistical area name Las Vegas-Paradise MSA 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 18 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 COParameter code 81102 88101 86101 88101 88502 88355 44201 42600 42101 Basic monitoring objective(s) 

NAAQS 

comparison 

NAAQS 

comparison 

Research 

support 

NAAQS 

comparison 

Research 

support 

Research 

support 

NAAQS 

comparison

Research 

support 

Researc

suppor

Site type(s) Population exposure Population exposure Population exposure Population exposure Highest concentration Highest concentration Population exposure Population exposure Populati

exposur

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

Metone 

BAM 1020 

(mathematical difference) Andersen 300 RAAS Met One SASS URG 3000 TAPI 400 series TAPI 200EU TAPI 300

Method code EQPM- 0308-170 EQPM- 0308-170 EQPM- 0709-185 RFPS- 0598-120 NA NA EQOA- 0992-087 NA RFCA- 1093-09FRM/FEM/ARM/other 

FEM FEM FEM FRM Other Other FEM Other FRM 

Collecting agency DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ Analytical lab NA NA NA Weigh RTI RTI NA NA NA Reporting agency DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ Spatial scale Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Neighbor- hood Urban Neighbo

hood 

Monitoring start date 01/01/2012 01/01/2012 01/01/2012 10/02/2010 05/2010 05/2010 01/01/2011 01/01/2011 01/01/20Current sampling frequency Continuous Continuous Conti- nuous 1:3 1:3 1:3 Continuous Continuous ContinuoCalculated sampling frequency Continuous Continuous Conti- nuous 1:3 1:3 1:3 Continuous Continuous ContinuoSampling season Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-round Year-rouProbe height (m) 4.7 5.0 4.7 & 5.0 3.0 2.8 3.0 3.8 7.0 3.8 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 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 CODistance from supporting structure (m) 

1.7 2.0 1.7 & 2.0 2.0 1.8 2.0 1.3 7.0 1.3 

Distance from obstructions on roof (m) 

NA NA NA NA NA NA NA NA NA 

Distance from obstructions not on roof (m) 

NA NA NA 25 25 25 19 19 19 

Distance from trees (m) NA NA NA 25 25 25 18 19 18 Distance to furnace or incinerator flue (m) 

NA NA NA NA NA NA NA NA NA 

Distance between collocated monitors (m) 

2.7 2.7 NA NA 2.3 2.3 NA NA NA 

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

N N N Y 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 

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

Biweekly Biweekly Biweekly NA NA NA NA NA NA 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 20 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 COFrequency of onepoint QC check for gaseous instruments NA NA NA NA NA NA Daily Daily Daily Last annual performance evaluation for gaseous parameters 

NA NA NA NA NA NA 12/05/2012 None 12/19/20

Last two semiannual flow rate audits for PM monitors 6/29/2012; 11/28/2012 06/29/2012; 11/28/2012 NA 03/21/2012; 06/27/2012; 09/26/2012; 12/07/2012 03/21/2012; 06/27/2012; 9/26/2012; 12/07/2012 03/21/2012; 06/27/2012; 09/26/2012; 12/07/2012 NA NA NA Meteorological measurements include wind speed, wind direction, ambient temperature, relative humidity, precipitatsure. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 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 (2011) (estimated) 

Ground cover Gravel, grass, pavement 

Representative statistical area name Las Vegas-Paradise 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 

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 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 22 5/23/2013 

Pollutant, POC PM10, 1 O3, 1 NO2, 1

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) 4.7 3.8 3.8 

Distance from supporting structure (m) 2.2 1.4 1.4 

Distance from obstructions on roof (m) NA NA NA 

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

Distance from trees (m) 8.2 5.7 5.7 

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 6.6 10.7 

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 08/14/2012 12/13/2012 

Last two semiannual flow rate audits for 

PM monitors 06/27/2012; 11/27/2012 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 

5/23/2013 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 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 5/23/2013 

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 

Distance from trees (m) 24 

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) 2.7 

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 06/20/2012 

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 

5/23/2013 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 (2011) (estimated) 

Ground cover Paved 

Representative statistical area name Las Vegas-Paradise 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 5/23/2013 

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) 4.9 3.7 

Distance from supporting structure (m) 2.3 1.4 

Distance from obstructions on roof (m) NA NA 

Distance from obstructions not on roof (m) NA NA 

Distance from trees (m) 16.7 19.9 

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 6.8 

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 06/18/2012 

Last two semiannual flow rate audits for 

PM monitors 03/22/2012; 09/21/2012 NA 

Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric 

pressure. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 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 (2011) (estimated) 

Ground cover Concrete, grass 

Representative statistical area name Las Vegas-Paradise 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 5/23/2013 

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) 6.3 4.0 

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 

Distance from trees (m) 17.1 21 

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 6.5 

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 10/04/2012 

Last two semiannual flow rate audits for PM monitors 06/28/2012; 11/27/2012 NA 

Meteorological measurements include wind speed, wind direction, ambient temperature, and barometric 

pressure. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 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 it monitors PM2.5 using both filter-based and continuous methodologies. It also serves as the primary and collocated sampling site for PM2.5 FRM samplers. 

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 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 

Quality 

assurance 

Highest 

concentration 

Population 

exposure 

Monitor type(s) SLAMS SLAMS SLAMS QA collocated SLAMS SLAMS 

Instrument manufacturer 

& model 

Thermo 

FH62C14 

API 300 

series Thermo 2025i Thermo 2025i Thermo 5014i API 200 series 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 30 5/23/2013 

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

Collocated, 2

PM2.5 

(cont.), 3 NO2, 1 

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 04/14/2004 04/14/2004 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) 4.7 3.6 2.9 2.9 4.8 3.6 

Distance from supporting 

structure (m) 2.2 1.2 2.1 2.1 2.3 1.2 

Distance from obstructions 

on roof (m) NA NA NA NA NA NA 

Distance from obstructions 

not on roof (m) NA NA 8 7 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 2.13 NA NA NA 3.1 

Will there be changes within 

the next 18 months? (Y/N) N N N N N 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 

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 09/25/2012 NA NA NA None 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 Page | 31 

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

Collocated, 2

PM2.5 

(cont.), 3 NO2, 1 

Last two semiannual flow 

rate audits for PM monitors 

03/15/2012; 

09/20/2012 NA 

03/15/2012; 

06/27/2012; 

11/29/2012 

0315/2012; 

11/29/2012 

03/15/2012; 

09/20/2012 NA 

Meteorological measurements include wind speed, wind direction, and ambient temperature. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 32 5/23/2013 

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) 7,100 (2011) 

Ground cover Concrete/asphalt, grass 

Representative statistical area name Las Vegas-Paradise 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 

5/23/2013 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) 3.7 

Distance from supporting structure (m) 1.4 

Distance from obstructions on roof (m) NA 

Distance from obstructions not on roof (m) 18.4 

Distance from trees (m) 16.5 

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) 2.31 

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 03/26/2012 

Last two semiannual flow rate audits for PM monitors NA 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 34 5/23/2013 

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 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 

5/23/2013 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) 3.9 3.9 

Distance from supporting structure (m) 1.2 1.2 

Distance from obstructions on roof (m) NA NA 

Distance from obstructions not on roof (m) 2.5 2.5 

Distance from trees (m) 26.4 26.4 

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 3.0 

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) 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 03/30/2012 03/26/2012 

Last two semiannual flow rate audits for PM monitors NA NA 

For all gaseous monitoring operations, a two-point (zero/span) QC check is conducted daily and a three-point (zero/precision/span) QC check is conducted weekly. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 36 5/23/2013 

Section 5: Maps of Criteria Pollutant Monitoring Stations in 2012 

Figure 15: CO Monitors. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 Page | 37 

Figure 16: O3 Monitors. 

 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 38 5/23/2013 

Figure 17: NOx Monitors. 

 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 Page | 39 

Figure 18: SO2 Monitors. 

 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 40 5/23/2013 

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

5/23/2013 Page | 41 

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

Page | 42 5/23/2013 

Figure 21: Filter-Based PM2.5 Sampler. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 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 2012. 

Table 10. 2012 NPAP and TTP Evaluations 

Monitoring Station Pollutant Evaluation Date

Boulder City O3 4/18 

Jean O3 4/18 

Mesquite O3 4/19 

Apex O3 4/19 

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

PEP audit results (in μg/m3

) are generated and submitted to the AQS database. 

Table 11. 2012 PEP Audit Activity 

Sampler Location Pollutant Audit Date

Sunrise Acres, Jerome Mack PM2.5 (FRM) 1/19 

Sunrise Acres, Jean PM2.5 (FRM) 4/12 

Jerome Mack PM2.5 (FRM) 7/17 

Jean PM2.5 (FRM) 10/12 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 44 5/23/2013 

Section 7: Network Modifications 

7.1 Completed Changes 

DAQ has made the following network changes. 

Table 12. Summary of 2012 Network Modifications 

Action Date Explanation 

Replaced low volume PM10 Pb sampling 

with high volume TSP Pb sampling 07/01/2012 Per EPA guidance 

Replaced continuous PM2.5 monitor at 

Sunrise Acres 10/01/2012 Upgraded from non-designated PM2.5 to PM2.5 FEM 

Replaced continuous PM2.5 monitor at 

JD Smith 01/01/2013 Upgraded from non-designated PM2.5 to PM2.5 FEM 

Added NO2 monitoring at Sunrise Acres 01/01/2013 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. 

DAQ proposes changing the speciation parameters’ site type at Jerome Mack from highest concentration 

to population exposure. 

Table 13. Proposed Site and Equipment Terminations, 2012–2014 

Site/Equipment Termination Date Explanation

Green Valley site To be determined Unresolved lease issues 

Additional site closures To be determined Sites closed because of resource limitations 

Table 14. Proposed Site and Equipment Installations, 2012–2014 

Site/Equipment Installation Date Explanation 

Near-road NO2 To be determined Required by 40 CFR 58, Appendix D 

Near-road NO2 at City Center 

(interim near-road monitoring location) January 2014 Required by 40 CFR 58, Appendix D 

Apex Sonic Detection and Ranging To be determined Upper-air winds assessment 

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 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. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 Page | 45 

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. After investigating different locations, using guidance in EPA’s June 

2012 Near-Road Technical Assistance Document (TAD), DAQ identified a suitable location at the 

southeast side of the intersection between Rancho Drive and Teddy Drive. DAQ is trying to acquire this 

location to set up a near-road monitoring station; however, since right-of-way issues and related construction may delay this process more than a fiscal year, DAQ proposes the City Center (AQS 32-003-

0016) site as an interim location. It sits in one of the valley’s highest traffic areas, where traffic is congested at least twice per day. Predominant wind flow brings transport from the resort corridors on I-15 

and South Las Vegas Boulevard (Las Vegas Strip) here, as well as roadside emissions from U.S. Highway 95. Since the site is within 50 m of U.S. 95, it may also be suitable for microscale monitoring; a 

previous study determined that O3 was undergoing titration by NOx from vehicles on U.S. 95. City Center also has the flexibility to qualify for neighborhood-scale monitoring. 

40 CFR 58.13 requires one CO monitor to be placed at the near-road site. DAQ anticipates having a 

monitor operational by January 1, 2017, as required. 

EPA will require near-road PM2.5 monitoring beginning January 1, 2017 (vol. 78, p. 10 of the Federal 

Register). DAQ anticipates having a monitor operational by January 1, 2017, as required. 

7.5 Special Purpose Sites 

Spring Mountain Youth Camp O3 Research Site. On May 10, 2010, DAQ installed a new Special Purpose Monitor1

 (SPM) at the Spring Mountain Youth Camp to provide periodic O3 data needed to further 

its research on transport corridors in Clark County and to validate its modeling methodology. DAQ has 

always designated this monitor as SPM, and coded it that way in the AQS.2 It has operated the SPM at 

this site at different intervals expressly to collect research data; the last time was in September 2012. 

Since the collection of proprietary research data was DAQ’s sole purpose in establishing the Spring 

Mountain site, it has never used that SPM to show minimum regulatory compliance pursuant to 40 CFR 

58. Furthermore, DAQ has never used either FRM or FEM when collecting SPM data at the Spring 

Mountain Youth Camp site.3 Although the SPM at this site was approved to apply FEM to monitor 

ozone, data was never collected using FEM. 

One of the primary FEM requirements is to comply with the testing procedure for the specific pollutant4

: 

for O3, the set-up and start-up of the test analyzer, test samplers, and reference method must be in strict 

accordance with the manufacturer’s operation manuals.5 The regulation leaves no room for even minor 

deviation from the manual’s specifications.6

 

1

 Teledyne API Model 400E, Serial No. 1980. 

2

 See AQS entry designating the monitors as SPM on May 5, 2010. Monitor Comment in the AQS indicated that the Spring 

Mountain Youth Camp was a 2010 smoke study site for ozone. 

3 40 CFR 58.20(a). 

4

 40 CFR 53.3(b). 

5

 40 CFR 53.32(d)(1). 

6

 40 CFR 53.32(d)(1), which mandates strict compliance rather than substantial compliance. 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 46 5/23/2013 

The SPM at the Spring Mountain Youth Camp operated substantially outside the specification range 

and allowable tolerance provided in the operating manual.7

 For example, the altitude for the SPM at this 

site is 569 m higher than the highest possible range allowable for the Teledyne API Model 400E to provide data using FEM.8

 This deviation was planned: DAQ chose this research site as a transport-source, 

high-concentration ozone area precisely for its high elevation, among other factors. In addition, the pressure ranges of this SPM site are predictably out of the monitor’s specified range; according to the operating manual, the acceptable range for pressure level is 25-31, but the recorded pressure range at this site 

is 20.7. The flow rate was predictably affected: although the allowable tolerance level for an SPM is 10 

percent within 800 cc/min., the actual flow rate recorded for the SPM at this site is 619-637 cc/min., 

substantially outside the acceptable tolerance level. Therefore, the data from the SPM at the Spring 

Mountain Youth Camp can never be collected using FEM. 

DAQ operated the SPM in the Spring Mountain Youth Camp site intermittently between May 2010 and 

September 2012, nor for 24 consecutive months. Unlike much of the country, Nevada’s ozone season 

lasts year-round.9

 But the SPM at Spring Mountain Youth Camp operated only during the summer 

months, pursuant to its research objective, so it cannot provide 24 months of O3 data. 

Because the SPM O3 data were not collected using any federally approved method10, DAQ did not deem 

it necessary to comply with 40 CFR 58.11, 58.12 , Appendix A, or Appendix E.11 Accordingly, DAQ 

did not follow the auditing and other quality control procedures for an SPM mandated by these regulatory provisions. However, it voluntarily submitted the SPM data to EPA’s Air Quality System (AQS) database12, seeking to contribute to the evolving science of air quality. DAQ has funded its own research 

with the objective of contributing to the goals of the Clean Air Act, and would like to continue researching high elevation sites that are not necessarily part of a regulatory monitoring network. 

The tables below summarize DAQ’s summer O3 site information. 

 

7

 04315 Rev. C, M 400E Ozone Analyzer Operator’s Manual: Basic Unit Specification 

8

 Id which provides that altitude range for the placement for the monitor in Spring Mountain Youth Camp to be 0-2000 M in 

order to collect data using FEM. 

9

 40 CFR 58, Appendix D. 

10 40 CFR 58.20(a). 

11 40 CFR 58.20(b): It is a threshold question whether data were collected using FEM. 12 40 CFR 58.20(b). 
Clark County, Nevada: Annual Monitoring Network Plan Report 

5/23/2013 Page | 47 

Table 15. Spring Mountain Youth Camp 

Local Site Name (AQS ID) SM Youth Camp (32-003-7771) 

GPS Coordinates (latitude, longitude) +36.318889°, -115.585278° 

Representative statistical area name Las Vegas-Paradise MSA 

Pollutant O3 

Parameter code 44201 

Method code EQOA-0992-087 

Sampling frequency Continuous, seasonal 

Sampling season 04/01-09/30 

Basic monitoring objective(s) Research support 

Site type(s) Regional transport 

Monitor type(s) Special purpose 

Table 16. Arden Peak 

Local Site Name (AQS ID) Arden Peak, (32-003-7778) 

GPS Coordinates (latitude, longitude) +35.945833°, -115.042778° 

Representative statistical area name Las Vegas-Paradise MSA 

Pollutant O3 

Parameter code 44201 

Method code EQOA-0992-087 

Sampling frequency Continuous, seasonal 

Sampling season 04/01-09/30 

Basic monitoring objective(s) Research support 

Site type(s) Regional transport 

Monitor type(s) Special purpose 

Table 17. Frenchman Mountain 

Local Site Name (AQS ID) Frenchman Mountain (32-003-7774) 

GPS Coordinates (latitude, longitude) +36.176944°, -114.998611° 

Representative statistical area name Las Vegas-Paradise MSA 

Pollutant O3 

Parameter code 44201 

Method code EQOA-0992-087 

Sampling frequency Continuous, seasonal 

Sampling season 04/01-09/30 

Basic monitoring objective(s) Research support 

Site type(s) Regional transport 

Monitor type(s) Special purpose 
Clark County, Nevada: Annual Monitoring Network Plan Report 

Page | 48 5/23/2013 

Table 18. Laughlin 

Local Site Name (AQS ID) Laughlin (32-003-7779) 

GPS Coordinates (latitude, longitude) +35.169444°, -114.579444° 

Representative statistical area name Las Vegas-Paradise MSA 

Pollutant O3 

Parameter code 44201 

Method code EQOA-0992-087 

Sampling frequency Continuous, seasonal 

Sampling season 04/01-09/30 

Basic monitoring objective(s) Research support 

Site type(s) Regional transport 

Monitor type(s) Special purpose 

At the request of EPA’s Office of Air Quality Planning and Standards, DAQ is taking part in the Sunset 

Organic Carbon/Elemental Carbon Evaluation Project. A semi-continuous carbon sampler has been installed at the Jerome Mack NCore station and is expected to run for three years. DAQ is now awaiting 

protocols from EPA to load related data 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. We have identified potential 

monitoring sites in Indian Springs, Coyote Springs, Primm, Logandale, the north-central and southwest 

areas of the Las Vegas Valley, and mountain ranges surrounding the valley.