### 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, Ne vada 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 netw ork in 2012, as required by Title 40, Part 58 of the Code of Federal Regulatio ns. It describes network operation in 2012, changes planned for 2013–2014, and the ways in which Clark Count y disseminates network data to the public in a timely manner.

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## TABLE OF CONTENTS

Section 1: Introduction .................................................................................................................. ...........1 Section 2: Minimum Monitoring Requirements ......................................................................................2 2.1 Ozone ......................................................................................................................... .2 2.2 PM 2.5 

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

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

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

## .............................................................................................................................. 3 2.6 CO ............................................................................................................................ ...4 2.7 Pb ............................................................................................................................ ....4 Section 3: Collocated Monitors ........................................................................................................... .....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. ....................................................................................................................2 1 Figure 9: Mesquite. ...................................................................................................................23 Figure 10: Palo Verde. ................................................................................................................25 Figure 11: Paul Meyer. ...............................................................................................................27 Figure 12: Sunrise Acres. ...........................................................................................................29 Figure 13: Walter Johnson..........................................................................................................32 Figure 14: Winterwood...............................................................................................................34 Figure 15: CO Monitors. ............................................................................................................36 Figure 16: O 3 

## Monitors. ..............................................................................................................37 Figure 17: NO x 

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

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

## Monitors. ......................................................................................40 Figure 20: Continuous PM 2.5 

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

## Sampler. .....................................................................................42

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## LIST OF TABLES

Table 1. Minimum Monitori ng Requirements for Ozone .........................................................2 Table 2. Minimum Monitoring Requirements for PM 2.5 

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

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

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

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

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

## FEM Network ................................................................................5 Table 10. 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 Depart ment 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

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# Section 1: Introduction

This report serves as a review of the current Clar k County Department of Ai r Quality (DAQ) air monitoring network and a plan for future network activ ities. 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 PM 10 

## , ozone (O 3 

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

## , NO x 

## , NO Y 

## ), sulfur dioxide (SO 2 

## ), and lead (Pb).

2. DAQ operated under a quality-assured system.

3. DAQ operated visibility instrume ntation at North Las Vegas Ai rport as a special project.
Criteria air pollutants are a group ofsix common air pollutants regulated by the U.S. Environmental Protection Agency (EPA), which developed National Ambient Air Qual ity Standards (NAAQS) for these pollutants to protect public hea lth and the environment. The six criteria pollutants are O 3 

## , PM 2.5 

## /PM 10 

## , CO, NO 2 

## , SO 2 

## , and Pb.

Currently, Clark County meets the O 3 

## , PM 2.5, 

## CO, and NO 2 

## NAAQS, and is unclassifiable for SO 2 

## and Pb. The Las Vegas Valley (Hydrographic Area 212) with in Clark County is classi fied as a serious nonattainment area for PM 10. 

## The area had attained the PM 10 

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

## , submitted by DAQ in August 2012. EPA ac tion 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 custom ized data reports upon request.Clark County, Nevada: Annual Monitoring Network Plan ReportPage | 25/23/2013Section 2:Minimum Monitoring RequirementsThe tables below show that the Clark County air quality network meets or exceeds the minimum requirements of Title 40, Part 58of the Codeof Federal Regulations (40 CFR 58).2.1OzoneTable 1. Minimum Monitoring Requirements for OzoneMSA1CountyPopulation &Census Year8-hr Design Value[ppb], DV Years2Design Value site(name, AQS ID3)# RequiredMonitors#ActiveMonitors#Add’l MonitorsNeededLas VegasParadise (29820)Clark, NV 1,969,975 (2011)76, 2010-12Joe Neal(32-003-0075)2 11 0Las VegasParadise (29820)Clark, NV 1,969,975 (2011)76, 2010-12Walter Johnson(32-003-0071)2 11 01Metropolitan Statistical Area.2DV Years = the three years over which the design value was calculated (e.g., 2010-2012).3Air Quality System (site) Identification.Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.2.2PM2.5Table 2. Minimum Monitoring Requirements for PM2.5MSA CountyPop. &Census YrAnnual DesignValue [μg/m3],DV Years1Annual DesignValue Site(name, AQS ID)Daily DesignValue [μg/m3],DV yearsDaily DesignValue Site(name, AQS ID)# RequiredSLAMSMonitors# ActiveSLAMSMonitors#Add’l SLAMSMonitorsNeededLas VegasParadise(29820)Clark,NV1,969,975(2011)7.7, 2010-12Sunrise Acres(32-003-0561)21, 2010-12Sunrise Acres(32-003-0561)24 + colloca-tion01DV 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 FEM data to make a designvalue determination.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 Report5/23/2013Page | 32.3PM10Table 3. Minimum Monitoring Requirements for PM10MSA CountyPop. & CensusYearMax. Concentrationin 2012 [μg/m3]Max. Conc. Site(name, AQS ID)# Req’dMonitors# ActiveMonitors# Add’l MonitorsNeededLas VegasParadise(29820)Clark, NV 1,969,975 (2011)314Boulder City(32-003-0601)4-8 9 0Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.2.4NO2Table 4. Minimum Monitoring Requirements for NO2CBSA1Pop. &CensusYearMax AADTCounts(yr)# Req’dNear-roadMonitors# ActiveNear-roadMonitors# Add’l Nearroad MonitorsNeeded# Req’dArea-wideMonitors# ActiveAreawideMonitors# Add’l Areawide MonitorsNeededLas Vegas-ParadisePahrump (332)1,969,975(2011)6,130 0 0 1 1 2 01Core-Based Statistical Area.Monitors required for SIP or maintenance plan: NA. J.D. Smith and Sunrise Acres meet requirementsfor areawide monitors; Sunrise Acres meets RA40 requirements.Monitors required for Photochemical Assessment Monitoring Station: NAEPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.3.4: 1Near-road NO2monitoring must commence in 2014.2.5SO2Table 5. Minimum Monitoring Requirements for SO2CBSA CountyPop. & Cen-sus YearTotal SO21[tons/yr]Pop. Weighted Emissions Index2[million persons-tons/yr]# Req’dMonitors# ActiveMonitors# Add’l Mon-itors NeededLas VegasParadise-Pahrump(332)Clark,NV1,969,975(2011)6,725 13,450 (est.) 1 1 01Using 2008 NEI data.2Calculated by multiplying CBSA population and total SO2and dividing product by one million.Clark County, Nevada: Annual Monitoring Network Plan ReportPage | 45/23/2013Population Weighted Emissions Index requirements met.Monitors required for SIP or maintenance plan: NAEPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.4.3: 0This network meets the minimum monitoring requirement for the referenced criteria pollutant.2.6COTable 6. Minimum Monitoring Requirements for COCBSA Pop. & Census Year# Req’d Near-RoadMonitors# Active Near-RoadMonitors# Add’l MonitorsNeededLas Vegas-ParadisePahrump (332)1,969,975 (2011) 0 0 0Monitors required for SIP or maintenance plan: NAEPA Regional Administrator-required monitors per 40 CFR 58, App. D, Sec. 4.2.2: 0This network meets the minimum monitoring requirement for the referenced criteria pollutant.2.7PbThe source emission threshold for the ambient source-oriented Pb monitoring requirement is 0.50 tons per year. DAQ has not identifiedsources that might trigger thisrequirement, and a preliminary assessment hasshown no such sources within Clark County. Therefore, DAQdoes not conduct source-oriented Pb monitoring.Table 7. Minimum Monitoring Requirements for Pb at NCoreNCore Site(name, AQS ID)CBSAPop. & CensusYear# Req’dMonitors# ActiveMonitors# Add’l MonitorsNeededJerome MackMiddle School(32-003-0540)Las VegasParadisePahrump (332)1,969,975(2011)1 1 0Monitors required for SIP or maintenance plan: NAThis network meets the minimum monitoring requirement for the referenced criteria pollutant.Clark County, Nevada: Annual Monitoring Network Plan Report5/23/2013Page | 5Section 3:Collocated MonitorsTable 8. Filter-Based PM2.5FRM NetworkMethod Code # Primary Monitors, Site # Required Collocated Monitors # Active Collocated MonitorsRFPS-0498-118 1, Sunrise Acres 1 1 QA collocatedRFPS-0598-120 2, Jean and Jerome Mack 1 0DAQ has two PM2.5methods operating in its network: the existing Andersen Model 300 (Method RFPS-0598-120), and the newer ThermoModel 2025i (Method RFPS-0498-118). The Andersen Model 300 samplersare well beyond their life expectancy, and are no longer supported; therefore, DAQ is acquiring, acceptance testing, deploying,and field testing Thermo Model 2025i samplers to replace them in thenetwork. DAQ anticipates completing this transitionin 2013, at which time there will only be one PM2.5FRM method in place. It will, however, be fully compliant with collocation requirements.Table 9. Continuous PM2.5FEM NetworkMethod Code# Primary Monitors,Site# RequiredCollocated Monitors# Active CollocatedFRM Monitors# Active Collocated FEM Monitors(same method designation as primary)EQPM-0609-183 1, J.D. Smith 1 0 0Currently, all DAQ sites butone with continuous PM2.5FEM monitors also have a PM2.5FRM sampler, which is the primary monitor for thatsite. The one exception is J.D. Smith, where the continuous PM2.5FEM monitor is the only PM2.5instrument on site. 40 CFR 58, Appendix Arequires 15% of PM2.5instruments to be collocated, both FRMs and FEMs. Since J.D. Smith’s only PM2.5measurement is with an FEM method, it is considered primary and comparable to theNAAQS. J.D. Smith and Sunrise Acres share the same PM2.5FEM methodology.To meet the PM2.5FEM collocation requirement, DAQ proposes classifying the PM2.5FEM at Sunrise Acres as the primary PM2.5monitor atthat site. The current PM2.5primary FRM at Sunrise would be moved to Jerome Mackand collocated with a similar FRM. The remaining collocated FRM at Sunrise Acres wouldserve as the collocation for the PM2.5FEM network, running on a one-in-three-day schedule.

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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 proces sing facilities and power plants. Since the site is generally downwind from Las Vegas, it also serves as an indicator of pollutant tr ansport flow out of the Las Vegas Valley. It is the only Air Quality monitoring station in the Apex Valley. Apex is an EPA-approved seasonal O 3 

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

Local Site Name (AQS ID) Apex (32-003-0022) GPS Coordinates (latitude, longit ude) +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 O 3 , 1
Parameter code 44201 Basic monitoring objectiv e(s) NAAQS comparison Site type(s) Regional transport Monitor type(s) SLAMS

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

5/23/2013 Page | 7 Pollutant, POC O 3 , 1
Instrument manufacturer & model TAPI 400 series
Method code EQOA-0992-087
FRM/FEM/ARM/other FEM Collecting agency DAQ Analytical lab NA Reporting agency DAQ Spatial scale Regional Monitoring start date 01/01/1998 Current sampling frequency Continuous, seasonal Calculated sampling frequency Continuous, seasonal Sampling season 04/01-09/30 Probe height (m) 3.8 Distance from suppor ting 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 PM 2.5 ? (Y/N) NA Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily Last annual performance evaluation for gas eous parameters 04/19/2012; 06/18/2012
Last two semiannual flow rate audits for PM monitors NA



## Meteorological measurements include wind spee d, wind direction, and am bient temperature.

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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 indicato r of population exposure to pol lutants, particularly O 3 

### and PM 10 

### .
Local Site Name (AQS ID) Boulder City (32-003-0601) GPS Coordinates (latitude, longit ude) +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 PM 10 , 1 O 3 , 1
Parameter code 81102 44201 Basic monitoring objective(s) NAAQ S 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

5/23/2013 Page | 9 4.1 Pollutant, POC PM 10 , 1 O 3 , 1 Analytical lab NA NA Reporting agency DAQ DAQ Spatial scale Neighborhood Neighborhood Monitoring start dat e 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 supporti ng 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 PM 2.5 ? (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.

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### Figure 3: Green Valley.

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

### and PM 2.5 

### .
Local Site Name (AQS ID) Green Valley (32-003-0298) GPS Coordinates (latitude, long itude) +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 PM 10, 1 PM 2.5 (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

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

5/23/2013 Page | 11 Pollutant, POC PM 10, 1 PM 2.5 (cont.), 3 Reporting agency DAQ DAQ Spatial scale Middle Middle Monitoring start dat e 01/01/1998 01/01/2003 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Y ear-round Year-round Probe height (m) 4.8 4.9 Distance from supporti ng 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 PM 2.5 FEM deployment anticipated in place of current instrument Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N
Frequency of flow rate verification for manual PM samplers NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly 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.

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

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

### , CO, and O 3 

### ) and particulate (PM 10 

### and PM 2.5 

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

Local Site Name (AQS ID) J.D. Smith (32-003-2002) GPS Coordinates (latitude, long itude) +36.191111°, -115.123056° Street Address 1301B Tonopah Av e., 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 PM 10 , 1 CO, 1 NO 2 , 1 O 3 , 1 PM 2.5 (cont.), 3

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

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5/23/2013 Page | 13 Pollutant, POC PM 10 , 1 CO, 1 NO 2 , 1 O 3 , 1 PM 2.5 (cont.), 3
Instrument manufacturer & model Thermo FH62C14 TAPI 300 series TAPI 200 series TAPI 400 series Thermo 5014i

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

FRM/FEM/ARM/other FEM FRM FRM FEM 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 Conti nuous Continuous Continuous
Calculated sampling frequency Continuous Continuous Conti nuous 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 4.8Distance 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 PM 2.5 ? (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

Page | 14 5/23/2013 Pollutant, POC PM 10 , 1 CO, 1 NO 2 , 1 O 3 , 1 PM 2.5 (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, wi nd direction, ambient temperature, relative humidity, and barometric pressure.

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### Figure 5: Jean.

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

Local Site Name (AQS ID) Jean (32-003-1019) GPS Coordinates (latitude, long itude) +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 PM 10 , 1 PM 2.5 (FRM), 1 O 3 , 1 PM 2.5 (cont.), 3
Parameter code 81102 88101 44201 88502
Basic monitoring objective(s) NAAQS compar ison 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 RF PS-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

Page | 16 5/23/2013 Pollutant, POC PM 10 , 1 PM 2.5 (FRM), 1 O 3 , 1 PM 2.5 (cont.), 3 Spatial scale Regional Regional Regional Regional Monitoring start date 01/01/1995 01/01/1999 08/01/1998 05/26/2007 Current sampling frequency Continuo us 1:3 Continuous Continuous Calculated sampling frequency Cont inuous 1:3 Continuous Continuous Sampling season Year-round Year-round Year-round Year-round Probe height (m) 4.8 2.0 4 4.9Distance 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 360Probe 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 PM 2.5FEM deployment anticipated in place of current instrument Is it suitable for comparison against the annual PM 2.5 ? (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 temper ature, solar radiation, and barometric pressure.

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

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### Figure 7: Jerome Mack.

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

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

Local Site Name (AQS ID) Jerome Mack (32-003-0540) GPS Coordinates (latitude, long itude) +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 MSAClark County, Nevada: Annual Monitoring Network Plan ReportPage | 185/23/2013Pollutant, POCPM10, 3PM2.5(cont.), 3PM10-2.5(cont.), 3PM2.5(FRM),1SpeciationSASS, 5SpeciationURG, 5O3, 1 NOY, 1 Trace CO, 1Trace SO2,1Pb, 1Parameter code 81102 88101 86101 88101 88502 88355 44201 42600 42101 42401 14129Basic monitoringobjective(s)NAAQScomparisonNAAQScomparisonResearchsupportNAAQScomparisonResearchsupportResearchsupportNAAQScomparisonResearchsupportResearchsupportNAAQScomparisonNAAQScomparisonSite type(s)PopulationexposurePopulationexposurePopulationexposurePopulationexposureHighestconcentrationHighestconcentrationPopulationexposurePopulationexposurePopulationexposurePopulationexposurePopulationexposureMonitor type(s) NCore NCore NCore NCore NCore NCore NCore NCore NCore NCore NCoreInstrument manufacturer & modelMetoneBAM 1020MetoneBAM 1020MetoneBAM 1020(mathematical difference)Andersen300 RAASMet OneSASSURG 3000TAPI 400seriesTAPI200EUTAPI 300EUTAPI100EUAmericanEcotechHiVol 3000Method codeEQPM-0308-170EQPM-0308-170EQPM-0709-185RFPS-0598-120NA NAEQOA-0992-087NARFCA-1093-093EQSA-0495-100EQL-0510-191FRM/FEM/ARM/otherFEM FEM FEM FRM Other Other FEM Other FRM FEM FEMCollecting agency DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQAnalytical lab NA NA NA Weigh RTI RTI NA NA NA NA RTIReporting agency DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQ DAQSpatial scaleNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodNeighbor-hoodUrbanNeighbor-hoodNeighbor-hoodNeighbor-hoodMonitoring startdate01/01/2012 01/01/2012 01/01/201210/02/2010 05/2010 05/201001/01/2011 01/01/2011 01/01/2011 01/01/2011 01/01/2012Current samplingfrequencyContinuous ContinuousConti-nuous1:3 1:3 1:3 Continuous Continuous Continuous Continuous 1:6Calculated sampling frequencyContinuous ContinuousConti-nuous1:3 1:3 1:3 Continuous Continuous Continuous Continuous 1:6Sampling season Year-round Year-round Year-round Year-round Year-round Year-roundYear-round Year-round Year-round Year-round Year-roundProbe height (m) 4.7 5.0 4.7 & 5.03.0 2.8 3.0 3.8 7.0 3.8 3.8 2.2Clark County, Nevada: Annual Monitoring Network Plan Report5/23/2013Page | 19Pollutant, POCPM10, 3PM2.5(cont.), 3PM10-2.5(cont.), 3PM2.5(FRM),1SpeciationSASS, 5SpeciationURG, 5O3, 1 NOY, 1 Trace CO, 1Trace SO2,1Pb, 1Distance from supporting structure(m)1.7 2.0 1.7 & 2.0 2.0 1.82.0 1.3 7.0 1.3 1.3 1.2Distance from obstructions on roof(m)NA NA NA NA NA NA NA NA NA NA NADistance from obstructions not onroof (m)NA NA NA 25 25 25 19 19 19 19 25Distance from trees(m)NA NA NA 25 25 25 18 19 18 18 25Distance to furnaceor incinerator flue(m)NA NA NA NA NA NA NA NA NA NA NADistance betweencollocated monitors(m)2.7 2.7 NA NA 2.3 2.3 NA NA NA NA NAProbe material forreactive gasesNA NA NA NA NA NA Teflon Teflon Teflon Teflon NAResidence time forreactive gases (s)NA NA NA NA NA NA 2.6 NA 1.0 3.1 NAWill there bechanges within thenext 18 months?(Y/N)N N N Y N N N N N N NIs it suitable forcomparison againstthe annual PM2.5?(Y/N)N Y N Y N N N N N N NFrequency of flowrate verification formanual PM samplersNA NA NA Monthly Monthly Monthly NA NA NA NA MonthlyFrequency of flowrate verification forautomated PManalyzersBiweekly Biweekly Biweekly NA NA NA NA NA NA NA NAClark County, Nevada: Annual Monitoring Network Plan ReportPage | 205/23/2013Pollutant, POCPM10, 3PM2.5(cont.), 3PM10-2.5(cont.), 3PM2.5(FRM),1SpeciationSASS, 5SpeciationURG, 5O3, 1 NOY, 1 Trace CO, 1Trace SO2,1Pb, 1Frequency of onepoint QC check forgaseous instrumentsNA NA NA NA NA NA Daily Daily Daily Daily NALast annual performance evaluation for gaseousparametersNA NA NA NA NA NA 12/05/2012 None 12/19/2012 12/20/2012 NALast two semiannual flow rate audits for PM monitors6/29/2012;11/28/201206/29/2012;11/28/2012NA03/21/2012;06/27/2012;09/26/2012;12/07/201203/21/2012;06/27/2012;9/26/2012;12/07/201203/21/2012;06/27/2012;09/26/2012;12/07/2012NA NA NA NA03/21/2012;06/27/2012Meteorological measurements include wind speed, wind direction, ambient temperature,relative humidity,precipitation, and barometric pressure.

### 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 O 3 

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

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

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

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

### indicator. A NO x 

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

### precursors.

Local Site Name (AQS ID) Joe Neal (32-003-0075) GPS Coordinates (latitude, long itude) +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 PM 10 , 1 O 3 , 1 NO 2 , 1
Parameter code 81102 44201 42602 Basic monitoring objective(s) NAAQS compar ison 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 PM 10 , 1 O 3 , 1 NO 2 , 1 Spatial scale Neighborhood Neighborhood Neighborhood Monitoring start date 01/01/ 2001 07/01/2000 01/01/2008 Current sampling frequency Conti nuous 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 PM 2.5 ? (Y/N) N N N
Frequency of flow rate verification for manual PM samplers NA NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly NA NA
Frequency of one-point QC check for gaseous instruments NA Daily Daily

Last annual performance evaluation for gaseous parameters NA 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, wi nd 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 O 3 

### . 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 O 3 

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

Local Site Name (AQS ID) Mesquite (32-003-0023) GPS Coordinates (latitude, longit ude) +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 O 3 , 1
Parameter code 44201 Basic monitoring objectiv e(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 O 3 , 1 Analytical lab NA Reporting agency DAQ Spatial scale Neighborhood Monitoring start date 10/01/2001 Current sampling frequency Continuous, seasonal Calculated sampling frequency Continuous, seasonal Sampling season 04/01-09/30 Probe height (m) 3.6 Distance from suppor ting 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 PM 2.5 ? (Y/N) N Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily Last annual performance evaluation for gaseous parameters 06/20/2012
Last two semiannual flow rate audits for PM monitors NA



## Meteorological measurements include wind spee d, wind direction, and am bient 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 O 3 

### , but it also monitors PM 10 

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

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

Local Site Name (AQS ID) Palo Verde (32-003-0073) GPS Coordinates (latitude, long itude) +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 PM 10 , 1 O 3 , 1
Parameter code 81102 44201 Basic monitoring objective(s) NAAQ S 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 PM 10 , 1 O 3 , 1 Analytical lab NA NA Reporting agency DAQ DAQ Spatial scale Middle Neighborhood Monitoring start dat e 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 supporti ng 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 PM 2.5 ? (Y/N) N N
Frequency of flow rate verification for manual PM samplers NA NA
Frequency of flow rate verification for automated PM analyzers Biweekly NA
Frequency of one-point QC check for gaseous instruments NA Daily
Last annual performance evaluation for gaseous parameters NA 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 O 3 

### , but it also monitors PM 10 

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

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

Local Site Name (AQS ID) Paul Meyer (32-003-0043) GPS Coordinates (latitude, long itude) +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 PM 10 , 1 O 3 , 1
Parameter code 81102 44201 Basic monitoring objective(s) NAAQ S 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 PM 10 , 1 O 3 , 1 Collecting agency DAQ DAQ Analytical lab NA NA Reporting agency DAQ DAQ Spatial scale Neighborhood Neighborhood Monitoring start date 01/01/1998 07/01/1998 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Year-round Year-round Probe height (m) 6.3 4.0 Distance from supporti ng 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 t he next 18 months? (Y/N) N N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N Frequency of flow rate verification for manual PM samplers NA NA Frequency of flow rate verification for automated PM analyzers Biweekly NA Frequency of one-point QC check for gaseous instruments NA Daily Last annual performance evaluation fo r gaseous parameters NA 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 Valle y began as part of a CO study in the 1990s. All monitoring activities at the East Charleston site were transf erred here when that lease was terminated. The site’s primary objective is to monitor CO and PM; it monitors PM 10 

### , and it monitors PM 2.5 

### using both filter-based and continuous methodologies. It also serves as the primary and collocated sampling site for PM 2.5 

### FRM samplers.

Local Site Name (AQS ID) Sunrise Acres (32-003-0561) GPS Coordinates (latitude, long itude) +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 PM 10 , 1 CO, 1 PM 2.5 (FRM), 1 PM 2.5 FRM Collocated, 2 PM 2.5 (cont.), 3 NO 2 , 1

Parameter code 81102 42101 88101 88101 88101 42602Basic monitoring objective(s) NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison NAAQS comparison
Site type(s) Population exposure Highest concentration Highest concentration 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 PM 10 , 1 CO, 1 PM 2.5 (FRM), 1 PM 2.5 FRM Collocated, 2 PM 2.5 (cont.), 3 NO 2 , 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 Ne ighborhood 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 Cont inuous 1:3 1:6 Continuous ContinuousCalculated sampling frequency Continuous Continuous 1:3 1:6 Continuous Continuous
Sampling season Yea r-round Year-round Yea r-round Year-round Y ear-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 PM 2.5 ? (Y/N) N N Y Y Y N

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

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

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

Last annual performance evaluation for gaseous parameters NA 09/25/2012 NA NA NA None

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

5/23/2013 Page | 31 Pollutant, POC PM 10 , 1 CO, 1 PM 2.5 (FRM), 1 PM 2.5 FRM Collocated, 2 PM 2.5 (cont.), 3 NO 2 , 1

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 spee d, wind direction, and am bient 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 O 3 

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

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

Local Site Name (AQS ID) Walter Johnson (32-003-0071) GPS Coordinates (latitude, long itude) +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 O 3 , 1
Parameter code 44201 Basic monitoring objectiv e(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 O 3 , 1 Reporting agency DAQ Spatial scale Neighborhood Monitoring start date 08/01/1998 Current sampling frequency Continuous Calculated sampling frequency Continuous Sampling season Year-round Probe height (m) 3.7 Distance from suppor ting 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 PM 2.5 ? (Y/N) N Frequency of flow rate verification for manual PM samplers NA Frequency of flow rate verification for automated PM analyzers NA Frequency of one-point QC check for gaseous instruments Daily Last annual performance evaluation for gaseous parameters 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 ol dest sites. Its primary objective is to monitor CO and O 3 

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

Local Site Name (AQS ID) Winterwood (32-003-0538) GPS Coordinates (latitude, long itude) +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 O 3 , 2
Parameter code 42101 44201 Basic monitoring objective(s) NAAQ S 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 O 3 , 2 Reporting agency DAQ DAQ Spatial scale Neighborhood Neighborhood Monitoring start dat e 01/01/1998 07/01/1979 Current sampling frequency Continuous Continuous Calculated sampling frequency Continuous Continuous Sampling season Y ear-round Year-round Probe height (m) 3.9 3.9 Distance from supporti ng 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 t he next 18 months? (Y/N) N N Is it suitable for comparison against the annual PM 2.5 ? (Y/N) N N Frequency of flow rate verification for manual PM samplers NA NA Frequency of flow rate verification for automated PM analyzers NA NA Frequency of one-point QC check for gaseous instruments Daily Daily Last annual performance evaluation for gaseous parameters 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/sp an) 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: O 3 

### Monitors.

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

Page | 38 5/23/2013 

### Figure 17: NO x 

### Monitors.

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

5/23/2013 Page | 39 

### Figure 18: SO 2 

### Monitors.

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

Page | 40 5/23/2013 

### Figure 19: Continuous PM 10 

### Monitors.

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

5/23/2013 Page | 41 

### Figure 20: Continuous PM 2.5 

### Monitors.

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

Page | 42 5/23/2013 

### Figure 21: Filter-Based PM 2.5 

### Sampler.

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

5/23/2013 Page | 43 

# Section 6: National Performance Audit and Pe rformance Evaluation Programs

Each year, EPA Region 9 contracts for the Nation al Performance Audit Program (NPAP) Through-theProbe (TTP) performance evaluation, which focuse s on gaseous criteria pollutants. DAQ received a “Pass” on all NPAP and TTP perf ormance evaluations in 2012.

Table 10. 2012 NPAP and TTP Evaluations
Monitoring Station Pollutant Evaluation Date Boulder City O 3 4/18
Jean O 3 4/18 Mesquite O 3 4/19

Apex O 3 4/19



## Each year, the PM 2.5 

## FRM sampling network undergoes a Perform ance Evaluation Program (PEP) audit. PEP audit results (in μ g/m 3 

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

Table 11. 2012 PEP Audit Activity
Sampler Location Pollutant A udit Date Sunrise Acres, Jerome Mack PM 2.5 (FRM) 1/19 Sunrise Acres, Jean PM 2.5 (FRM) 4/12

Jerome Mack PM 2.5 (FRM) 7/17

Jean PM 2.5 (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 PM 10 Pb sampling with high volume TSP Pb sampling 07/01/2012 Per EPA guidance
Replaced continuous PM 2.5 monitor at Sunrise Acres 10/01/2012 Upgraded from non-designated PM 2.5 to PM 2.5 FEM
Replaced continuous PM 2.5 monitor at JD Smith 01/01/2013 Upgraded from non-designated PM 2.5 to PM 2.5 FEM

Added NO 2 monitoring at Sunrise Acres 01/01/ 2013 To meet RA40 requirements



## 7.2 Proposed Changes

This section, which describes anticipated and poten tial changes to the monito ring network over the next two years, constitutes Clark County’s official reques t to Region 9 for approval of proposed changes.

DAQ proposes changing the speciation parameters’ site type at Jerome Mack fr om 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 Site s closed because of resource limitations



### Table 14. Proposed Site and Equipment Installations, 2012–2014
Site/Equipment Installation Date Explanation
Near-road NO 2 To be determined Required by 40 CFR 58, Appendix D
Near-road NO 2 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 NO 2 

## 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 su itable location at the southeast side of the intersection between Rancho Dr ive and Teddy Drive. DAQ is trying to acquire this location to set up a near-road monitoring station; how ever, since right-of-way issues and related construction may delay this process more than a fi scal year, DAQ proposes the City Center (AQS 32-003- 0016) site as an interim location. It sits in one of th e valley’s highest traffic areas, where traffic is congested at least twice per day. Predominant wind flow brings transport from th e resort corridors on I-15 and South Las Vegas Boulevard (Las Vegas Strip) here, as well as ro adside emissions from U.S. Highway 95. Since the site is within 50 m of U.S. 95, it ma y also be suitable for microscale monitoring; a previous study determined that O 3 

## was undergoing titration by NO x 

## from vehicles on U.S. 95. City Center also has the flexibility to qua lify 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 PM 2.5 

## monitoring beginning January 1, 2017 (vol. 78, p. 10 of the Federal Register ). DAQ anticipates having a monitor opera tional by January 1, 2017, as required.

7.5 Special Purpose Sites

Spring Mountain Youth Camp O 3 

## Research Site. On May 10, 2010, DAQ insta lled a new Special Purpose Monitor 1 

## (SPM) at the Spring Mountain Yo uth Camp to provide periodic O 3 

## data needed to further its research on transport corrido rs in Clark County and to valid ate its modeling methodology. DAQ has always designated this monitor as SP M, and coded it that way in the AQS. 2 

## It has operated the SPM at this site at different intervals e xpressly to collect research data; th e last time was in September 2012.

Since the collection of pr oprietary research data was DAQ’s sole purpose in establishing the Spring Mountain site, it has never used that SPM to show minimum regulatory complian ce 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 wa s 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 pollutant 4 

## : for O 3 

## , the set-up and start-up of the test analyzer, test samplers, and refe rence 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 co mpliance 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 operate d substantially outside the specification range and allowable tolerance provi ded in the operating manual. 7 

## For example, the altitude for the SPM at this site is 569 m higher than the highe st possible range allowable for th e Teledyne API Model 400E to provide data using FEM. 8 

## This deviation was planned: DAQ chose th is research site as a transport-source, high-concentration ozone ar ea precisely for its high elevation, among other factors. In addition, the pressure ranges of this SPM site ar e 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 predicta bly 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 inte rmittently 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 objectiv e, so it cannot prov ide 24 months of O 3 

## data.

Because the SPM O 3 

## data were not collected usin g any federally approved method 10 

## , 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) database 12 

## , seeking to contribute to the evolving scien ce of air quality. DAQ has funded its own research with the objective of cont ributing to the goals of the Clean Air Ac t, and would like to continue researching high elevation sites that ar e not necessarily part of a re gulatory monitoring network.

The tables below summarize DAQ’s summer O 3 

## 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 m onitor in Spring Moun tain 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 questio n 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, longit ude) +36.318889°, -115.585278° Representative statistical area name Las Vegas-Paradise MSA
Pollutant O 3 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, longit ude) +35.945833°, -115.042778° Representative statistical area name Las Vegas-Paradise MSA
Pollutant O 3 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, longit ude) +36.176944°, -114.998611° Representative statistical area name Las Vegas-Paradise MSA
Pollutant O 3 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, longit ude) +35.169444°, -114.579444° Representative statistical area name Las Vegas-Paradise MSA
Pollutant O 3 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 Planni ng and Standards, DAQ is ta king 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 fo r 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 assessm ent, 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 m ountain ranges surrounding the valley.