Nevada Air Quality Trend Report
1998-2009
Nevada Division of Environmental Protection
Bureau of Air Quality Planning
January 2011
Nevada Air Quality Trend Report, 1998-2009
January 2011
i
DISCLAIMER
The information contained in the Nevada Air Quality Trend Report, 1998-2009 report is
for public use; every effort has been made to ensure its accuracy. The information
presented is as timely and accurate as practicable; no expressed or implied guarantees are
made. Information contained herein may be freely distributed and used for
noncommercial, scientific, and educational purposes.
Inquiries made in reference to this report should be directed to:
Bureau of Air Quality Planning
901 South Stewart Street, Suite 4003
Carson City, Nevada 89701-5249
Telephone: (775) 687-9349
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TABLE OF CONTENTS DISCLAIMER....................................................................................................... I TABLE OF CONTENTS ...................................................................................... II ACRONYMS & ABBREVIATIONS .................................................................... III ACKNOWLEDGEMENTS .................................................................................. IV EXECUTIVE SUMMARY .................................................................................... A 1 INTRODUCTION .......................................................................................... 1 1.1 BACKGROUND 1
1.2 NEVADA AIR QUALITY MONITORING NETWORK 2
1.3 ATTAINMENT STATUS OF AREAS 6
2 CRITERIA POLLUTANTS ............................................................................ 8 2.1 NATIONAL AMBIENT AIR QUALITY STANDARDS 8
2.2 CARBON MONOXIDE 10
2.2.1 NATIONAL CARBON MONOXIDE TREND ........................................................... 11
2.2.2 CARBON MONOXIDE TRENDS IN BAQP’s MONITORING NETWORK ........... 12
2.3 LEAD 15
2.3.1 NATIONAL LEAD TREND ........................................................................................ 16
2.4 NITROGEN DIOXIDE 17
2.4.1 NATIONAL NITROGEN DIOXIDE TREND ............................................................. 18
2.5 GROUND-LEVEL OZONE 19
2.5.1 NATIONAL GROUND-LEVEL OZONE TREND ..................................................... 21
2.5.2 OZONE TRENDS IN BAQP’s MONITORING NETWORK ..................................... 22
2.6 PARTICULATE MATTER 28
2.6.1 NATIONAL PM2.5 TREND .......................................................................................... 31
2.6.2 PM2.5 TRENDS IN BAQP’s MONITORING NETWORK .......................................... 32
2.6.3 NATIONAL PM10 TREND .......................................................................................... 36
2.6.4 PM10 TRENDS IN BAQP’s MONITORING NETWORK .......................................... 37
2.7 SULFUR DIOXIDE 42
2.7.1 NATIONAL SULFUR DIOXIDE TREND .................................................................. 44
2.7.2 SO2 EMISSIONS BY SOURCE SECTOR ................................................................... 44
APPENDICIES
Appendix A – Monitoring Station Descriptions ................................................................47
Appendix B – Monitoring Data Availability .....................................................................73
Appendix C – Monitoring Data .........................................................................................76
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ACRONYMS & ABBREVIATIONS
Nevada’s 15 Rural Counties: Carson City, Churchill, Douglas, Elko, Esmeralda,
Eureka, Humboldt, Lander, Lincoln, Lyon, Mineral,
Nye, Pershing, Storey, and White Pine
AMSL: Above Mean Sea Level
BAQP: Bureau of Air Quality Planning
BAM: Beta Attenuation Monitor
BTU: British Thermal Unit
CAA: Clean Air Act
CFR: Code of Federal Regulations
CO: Carbon Monoxide
DCNR: Department of Conservation and Natural Resources
GDP/GSP: Gross Domestic Product/Gross State Product
H2S: Hydrogen Sulfide
IMPROVE: Interagency Monitoring of Protected Visual
Environments
NAAQS: National Ambient Air Quality Standard
NAC: Nevada Administrative Code
NDEP: Nevada Division of Environmental Protection
O3: Ozone
Pb: Lead
PM2.5: Particulate Matter less than 2.5 microns
PM10: Particulate Matter less than 10 microns
SLAMS: State and Local Air Monitoring Station
SO2: Sulfur Dioxide
SPMS: Special Purpose Monitoring Station
USEPA: United States Environmental Protection Agency
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ACKNOWLEDGEMENTS
This Trend Report presents ambient air quality data collected by the State of Nevada and
the California Air Resources Board. The Nevada Department of Conservation and
Natural Resources (DCNR), Division of Environmental Protection (NDEP), Bureau of
Air Quality Planning (BAQP) gratefully acknowledges the ambient monitoring data
contributions of the California Air Resources Board, Monitoring and Laboratory
Division. The cover photo is of the Big Smoky Valley in central Nevada; provided
courtesy of Michelle Stamates of NDEP.
BAQP's ambient monitoring staff consists of:
Joleen Guddat
Tyson Harris
Steve Hoelscher
Lorraine Krecidlo
Daniel Timmons
Daren Winkelman
Nevada Air Quality Trend Report, 1998-2009
January 2011
EXECUTIVE SUMMARY
The primary purpose of BAQP’s ambient monitoring network is to determine current and
projected concentrations of ambient air pollutants within the state, ensure current resource
management strategies are working properly, and to develop new measures by which the
ambient air quality standards will continue to be attained.
The BAQP’s current active monitoring network consists of monitors located in the following
towns:
Carson City – PM10, PM2.5, CO, and O3
Gardnerville – PM10, PM2.5, and O3
Stateline – CO
Fernley – PM10, PM2.5, and O3
Fallon – PM10, and O3
Elko – PM10
Pahrump – multiple sites with PM10, and one site with PM2.5
This report spans the monitoring period from 1998 to 2009. During this period, BAQP
monitored the following criteria pollutants and observed the following trends:
Carbon Monoxide (CO): Ambient concentrations of CO have decreased and
remained well below the current National Ambient Air Quality Standards (NAAQS);
Ground-Level Ozone (O3): Ambient concentrations of O3 have remained steady and
below the current 2008 NAAQS;
Particulate Matter ≤2.5 micrometers (PM2.5): Ambient concentrations of PM2.5
have trended upward in Carson City and Gardnerville and are approaching the
NAAQS. The BAQP is in the process of analyzing samples to determine the cause(s)
of the elevated levels. Ambient concentrations of PM2.5 have decreased in Fernley.
Particulate Matter ≤10 micrometers in diameter (PM10): PM10 monitoring
conducted in Elko since 2006 has shown a decline in ambient concentrations.
Monitoring conducted in Pahrump shows that annual concentrations of PM10 have
decreased and remain well below the annual standard. The 24-hour PM10
concentrations in Pahrump remain steady at or near the standard. However, the
number of actual exceedances of the 24-hour standard have been reduced, most of
which occurred during uncontrollable high wind events.
It should be noted that the USEPA is actively reviewing and revising several of the
NAAQS. Generally, these reviews are resulting in revised standards that are more stringent.
More stringent standards may affect the future attainment status within the 15 Rural
Counties. As a result, the BAQP may be required to expand the State’s monitoring network.
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1 INTRODUCTION
1.1 BACKGROUND
Clean air is a managed natural resource. Nevada Revised Statute (NRS) 445B.100
establishes public policy regarding air quality in Nevada. This statute states:
It is the public policy of the State of Nevada . . . to achieve
and maintain levels of air quality which will protect human
health and safety, prevent injury to plant and animal life,
prevent damage to property, and preserve visibility and
scenic, esthetic and historic values of the state.
The mission of the Nevada Division of Environmental Protection (NDEP) and Bureau of
Air Quality Planning (BAQP) is to protect and enhance the environment in order to
sustain healthy ecosystems and contribute to a vibrant economy. Our mission is
accomplished through reasonable, fair, and consistent implementation of State and
Federal air quality rules and regulations, with emphasis on objective and impartial
responsiveness to the needs of a growing population and industrial base.
Air pollution comes from a variety of sources. These include "stationary sources," such
as factories, power plants, and smelters; smaller sources, such as dry cleaners and
degreasing operations; "mobile sources," such as cars, trucks, buses, trains, and planes;
and "natural sources," such as wildfires and windblown dust.
The USEPA has set NAAQS for six principal pollutants, which are called "criteria"
pollutants: carbon monoxide (CO), ground-level ozone (O3), particulate matter (PM2.5, with an aerodynamic size less than or equal to 2.5 microns, and PM10, with an
aerodynamic size less than or equal to 10 microns), sulfur dioxide (SO2), nitrogen dioxide
(NO2), and lead (Pb). There are two forms of the NAAQS – Primary and Secondary, and
they are summarized in Table 2.1. Primary standards are designed to protect human
health, including sensitive populations such as children and the elderly. Secondary
standards protect public welfare are designed to address the effects of air pollution on
vegetation and visibility.
The primary purpose of BAQP’s ambient monitoring network is to determine current and
projected concentrations of ambient air pollutants within the state, ensure current
resource management strategies are working properly, and to develop new measures by
which the ambient air quality standards will continue to be attained.
This document summarizes the ambient air data collected for the 12-year period between
1998 and 2009 from the BAQP monitoring network in Nevada’s 15 Rural Counties.3
3 Nevada’s 15 Rural Counties are Carson City, Churchill, Douglas, Elko, Esmeralda, Eureka, Humboldt,
Lander, Lincoln, Lyon, Mineral, Nye, Pershing, Storey, and White Pine. Clark and Washoe counties
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Review of long-term monitoring data reveals trends in the ambient air quality and
provides feedback on the effectiveness of measures utilized for managing the air
resource.
BAQP performs air monitoring throughout the state. The current active monitoring
network consists of monitors located in the following towns:
Carson City – PM10, PM2.5, CO, and O3
Gardnerville – PM10, PM2.5, and O3
Stateline – CO
Fernley – PM10, PM2.5, and O3
Fallon – PM10, and O3
Elko – PM10
Pahrump – multiple sites with PM10, and one site with PM2.5
It should be noted that the USEPA is actively reviewing and revising several of the
NAAQS. Generally, these reviews are resulting in revised standards that are more
stringent. More stringent standards may affect the future attainment status within the 15
Rural Counties. As a result, the BAQP may be required to expand the State’s monitoring
network. A brief discussion of all criteria pollutants under EPA review is provided in
Section 2.
operate and maintain monitoring networks separate from the Nevada Division of Environmental Protection
(NDEP) and publish their findings independently.
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1.2 NEVADA’S AIR MONITORING NETWORK
The BAQP operates a network of monitoring stations across Nevada’s 15 Rural Counties
as shown in Figure 1.1. The monitors conform to all EPA citing criteria and are situated
to measure air quality in both rural and the urbanized portions of the 15 Rural Counties.
In addition, BAQP maintains two meteorological stations, one in Carson City and one in
Pahrump, to provide meteorological information for the monitoring conducted in these
areas and to support stationary source permitting needs. Detailed descriptions of both
active and discontinued air quality monitoring stations are provided in Appendix B. A
comprehensive list of monitoring data availability at BAQP-maintained monitoring
stations is provided in Appendix C and monitoring data used in report preparation is in
Appendix D.
The monitoring conducted by the BAQP is established for the purposes of meeting
federal monitoring requirements and for state informational and planning purposes.
These two are categorized as: 1) State and Local Air Monitoring Stations (SLAMS); and
2) Special Purpose Monitoring Stations (SPMS). SLAMS sites are federally required,
long-term air quality monitoring stations. SPMS sites are typically established to
determine the air quality in a smaller, localized area or to monitor on a temporary basis.
These sites typically operate for six to 24 months, and are generally used to measure air
quality in areas not previously monitored. They may also be established to monitor the
effects of a specific air pollution source or group of sources on the surrounding air
quality. Some sites within the network contain monitors to address both SLAMS and
SPMS.
SLAMS monitoring is required once an area exceeds established county population
thresholds. Monitoring for Pb, SO2 and NO2, was not conducted during this reporting
period as the population-based thresholds were not reached in any of the 15 Rural
Counties. SPMS monitoring was also not conducted for these three pollutants.
This report presents the results of air quality monitoring conducted by BAQP from 1998
to 2009. Provided below is a summary of the pollutants monitored, their general trends,
and a description of the conditions under which the pollutants are typically found at their
highest concentration.
Carbon Monoxide (CO): BAQP’s monitoring network shows that the highest
concentrations of CO often occur in the winter during strong temperature
inversions in basins surrounded by mountains. When temperature inversions
occur, CO is trapped near ground level, causing elevated concentrations. Ambient
concentrations of CO have decreased and remained well below the current
NAAQS.
Ground-Level Ozone (O3): BAQP’s monitoring network shows that ambient
concentrations of O3 have remained steady and below the current 2008 NAAQS.
O3 concentrations are typically affected by the quantity of pre-cursor gases (NOx
and VOC’s), temperature, and amount of sunlight available during the summer.
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Particulate Matter ≤2.5 micrometers (PM2.5): BAQP’s monitoring network
shows that ambient concentrations of PM2.5 have trended upward in Carson City
and Gardnerville and are approaching the NAAQS. BAQP is in the process of
analyzing samples to determine the cause(s) of the elevated levels. Ambient
concentrations of PM2.5 have decreased in Fernley. The highest concentrations of
PM2.5 often occur in the winter during strong temperature inversions in basins
surrounded by mountains. When temperature inversions occur, residential wood
combustion is often at its peak and PM2.5 is trapped near ground level, causing
increases in ambient concentrations. Thus PM2.5 trends may reflect the occurrence
or absence of strong inversions during winter.
Particulate Matter ≤10 micrometers in diameter (PM10): During this reporting
period, many of the PM10 monitors in the BAQP’s network were taken offline
because measurements remained well below the PM10 NAAQS. PM10 monitoring
conducted in Elko since 2006 has shown a decline in ambient concentrations.
Monitoring conducted in Pahrump shows that annual concentrations of PM10 have
decreased and remain well below the annual standard. The 24-hour PM10
concentrations in Pahrump remain steady at or near the standard. However, the
number of actual exceedances of the 24-hour standard have been reduced, most of
which occurred during uncontrollable high wind events.
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Figure 1.1: Location of BAQP Monitoring Sites, 1998-2009
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1.3 ATTAINMENT STATUS OF AREAS
The BAQP’s Ambient Air Monitoring Branch is responsible for air quality surveillance
in Nevada’s 15 Rural Counties. In addition to BAQP’s monitoring network, air quality
monitoring is being conducted through the Interagency Monitoring of Protected Visual
Environments (IMPROVE) network by federal land management agencies. At present,
there are two active IMPROVE monitoring sites in Nevada; one located in the Jarbidge
Wilderness Area in northeastern corner of the state and the other near the Lehman Caves
Visitor Center in Great Basin National Park, along the eastern border of the state near
Baker.
The NAAQS published by the EPA in 40 CFR Part 50 define the levels of air quality that
EPA has determined protect human health and welfare. An area is considered to be in
nonattainment for a pollutant if it has violations a particular NAAQS. Conversely,
attainment areas are those where monitoring shows that no violation of the NAAQS have
occurred. An area is considered unclassifiable if no monitoring has been conducted to
determine its classification and NAAQS violations would not otherwise be expected.
The extent of an area’s classification is defined by the Hydrographic Area boundaries as
established in 1979 for the State of Nevada. The planning area boundaries are shown in
Figure 1.2.
From 1998-2009, areas under the jurisdiction of BAQP were classified as attainment or
unclassifiable for all criteria pollutants, with one exception. The Nevada side of the Lake
Tahoe Basin was designated nonattainment for CO in 1978, while the rest of Tahoe Basin
within BAQP’s jurisdiction was designated attainment/unclassifiable.8 On October 27,
2003, BAQP requested redesignation and the USEPA approved the request on December
15, 2003.
Clark and Washoe counties have their own independent ambient monitoring networks.
Please check each county's web site for additional information.
8 The Nevada side of the Lake Tahoe Basin is formally known as Hydrographic Area 90 which includes
portions of Carson City County, Douglas County, and Washoe County.
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Figure 1.2: BAQP Planning Areas
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2 CRITERIA POLLUTANTS
2.1 NATIONAL AMBIENT AIR QUALITY STANDARDS
The federal Clean Air Act (CAA), which was last amended in 1990, requires USEPA to
set NAAQS for pollutants considered a danger to public health and the environment. The
CAA established two types of NAAQS:
Primary standards set limits to protect public health, including the health of
sensitive populations such as children, the elderly, and asthmatics.
Secondary standards set limits to protect public welfare, including protection
against decreased visibility, damage to animals, crops, vegetation, and buildings.
Criteria pollutants are monitored with federal reference (FRM) or equivalent (FEM)
methods that USEPA has approved. For each criteria pollutant, USEPA specifies the
monitoring objectives that define the parameters by which health exposure and public
welfare are assessed, and the measurement scale classifications that describe the
influence of atmospheric movement at a given location.
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Table 2.1: National Ambient Air Quality Standards
NATIONAL STANDARDSA
POLLUTANT AVERAGING TIME PRIMARY B, D SECONDARYC, E METHOD C
Carbon Monoxide
1 hour 35 ppm
(40 mg/m3)
-- Nondispersive infrared photometry 8 hours
9 ppm
(10 mg/m3)
Lead
(Pb)
Rolling 3-Month
Average 0.15 µg/m3 F Same as Primary
High volume sampling, acid extraction, and
atomic absorption
spectrometry
Quarterly Arithmetic
Mean 1.5 µg/m3 Same as Primary
High volume sampling,
acid extraction, and
atomic absorption
spectrometry
Nitrogen Dioxide
(NO2)
Annual Arithmetic
Mean
0.053 ppm
(100 µg/m3) Same as Primary Gas phase chemiluminescence
1 hour 100 ppb -- Gas phase chemiluminescence
Ozone
1 hour -- G Same as Primary
Chemiluminescence -- --
8 hours 0.075 ppm H Same as Primary
Particulate Matter
≤2.5 micrometers
Annual Arithmetic
Mean
15.0 µg/m3 Same as Primary
Low volume
PM2.5 sampling
24 hours
35 µg/m3 I
Particulate Matter
≤10 micrometers
Annual Arithmetic
Mean -- J
Same as Primary High volume
PM10 sampling
24 hours 150 µg/m3
Sulfur Dioxide
(SO2)
Annual Arithmetic
Mean 0.030 ppm --
Spectrophotometry
(Pararosaniline method)
24 hours 0.14 ppm --
1 hour 75 ppb --
3 hours -- 0.5 ppm
(1,300 µg/m3)
A. These standards, other than for O3, PM, and those based on annual averages, must not be exceeded more than once per year. The 1-hour O3 standard is attained when the expected
number of days per calendar year with a maximum hourly average concentration above the standard is equal to or less than one. The PM10 24-hour standard is attained when the
expected number of days per calendar year with a 24-hour average concentration above the standard, rounded to the nearest 10 µg/m3, is equal to or less than one. The expected
number of days per calendar year is generally based on an average of the number of times the standard has been exceeded per year for the last 3 years. The National standards are
to be used in determinations of attainment or nonattainment.
B. Where applicable, concentration is expressed first in units in which it was adopted. All measurements of air quality that are expressed as mass per unit volume, such as
micrograms per cubic meter, must be corrected to a reference temperature of 25 degrees Centigrade and a reference pressure of 760 mm of Hg (1,013.2 millibars); “ppm” in this
table refers to parts per million by volume, or micromoles of regulated air pollutant per mole of gas; “µg/m3” refers to micrograms per cubic meter.
C. Any reference method specified in accordance with 40 C.F.R. Part 50 or any reference method or equivalent method designated in accordance with 40 C.F.R. Part 53 may be
substituted.
D. National primary standards are the levels of air quality necessary, with an adequate margin of safety, to protect the public health.
E. National secondary standards are the levels of air quality necessary to protect the public welfare from any known or anticipated adverse effects of a regulated air pollutant.
F. On October 15, 2008, USEPA tightened the NAAQS for Pb from 1.5 µg/m3 to 0.15 µg/m
3. This final rule became effective on January 12, 2009.
G. In June 2005, USEPA revoked the 1-hour O3 standard (0.12 ppm) except in 13 Early Action Compact areas, none of which are in Nevada.
H. On May 27, 2008, USEPA tightened the NAAQS for 8-hour O3 from 0.08 ppm to 0.075 ppm.
I. In December 2006, USEPA tightened the 24-hour PM2.5 standard from 65 µg/m3 to 35 µg/m
3.
J. In December 2006, USEPA revoked the annual PM10 standard due to a lack of evidence linking health problems to long-term exposure to coarse particle pollution.
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2.2 CARBON MONOXIDE
Carbon monoxide (CO) is a colorless, odorless, gas that is typically produced by the
incomplete combustion of fuels. Compliance with the CO NAAQS is met when the 35
ppm 1-hour average standard and/or the 9 ppm 8-hour average standard is not exceeded
more than once per year. The CO NAAQS have not changed since they were originally
promulgated in 1971; however, they are currently under USEPA review.
BAQP MONITORING NETWORK:
Between 1998 and 2009, BAQP measured ambient concentrations of CO at 4 monitors:
Long Street in Carson City: 1998-200911
Law Enforcement Building in Minden: 1998-1999
Horizon Casino Resort in Stateline: 1998-1999
Harvey’s Resort Hotel in Stateline: 1999-2009
ATTAINMENT STATUS:
From 1998-2009, areas under the jurisdiction of BAQP were classified as attainment or
unclassifiable for CO except for the Nevada side of the Lake Tahoe Basin. This portion
of the Basin was designated nonattainment for CO in 1978, while the rest of Tahoe Basin
within BAQP’s jurisdiction was designated attainment/unclassifiable. The nonattainment
designation was based on monitoring conducted in Stateline during the 1970s. On
October 27, 2003, BAQP requested redesignation of the Nevada side of the Basin to
attainment of the CO standards. BAQP’s redesignation request for the Nevada side of the
Lake Tahoe Basin was based on ambient air quality monitoring data that showed no
violations for calendar years 2001 through 2002. On December 15, 2003, USEPA
published a final rule effective February 13, 2004 redesignating the Nevada side of the
Lake Tahoe Basin attainment for CO.
11
Discontinued monitoring sites listed in italics.
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2.2.1 NATIONAL CARBON MONOXIDE TREND
Nationally, average CO concentrations have decreased substantially over the years. From
1980 to 2008 there was a 79 percent decrease in the national CO average.14
From 1990 to
2008, there was a 68 percent drop in the national CO average.15
The decrease in average
CO concentrations is largely the result of improved pollution control technology in on-
road vehicles that has significantly reduced CO emissions. Since 1970, CO emissions
from on-road vehicles have been cut by more than 40 percent nationwide. For more
information on national air quality trends, visit USEPA’s Air Trends website.
Figure 2.1: National Carbon Monoxide Trend, 1990-2008
Image courtesy of USEPA, Office of Air and Radiation
14
Based on Annual 2nd
Maximum 8-Hour Average. National Trend based on 124 sites. 15
Based on Annual 2nd
Maximum 8-Hour Average. National Trend based on 206 sites.
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2.2.2 CARBON MONOXIDE TRENDS IN BAQP’s MONITORING NETWORK
Since 1998, ambient concentrations of CO have trended downward and remained well
below the NAAQS. The Long Street monitor in Carson City has shown (Figures 2.4
through 2.7) a gradual but consistent downward tendency that mirrors the national trend
shown in Figure 2.1. Results from the Harvey’s Resort Hotel monitor in Stateline also
show a downward, although less consistent trend. The peak in 2002 was observed during
the July 2002 Gondola Fire; a timber wildfire that burned 673 acres at the Heavenly Ski
Resort a short distance from the monitor.
As mentioned in Section 2.2, compliance with the CO NAAQS is met when the 35 ppm
1-hour average standard and/or the 9 ppm 8-hour average standard is not exceeded more
than once per year.
Figure 2.4: Carbon Monoxide 1-Hour: 1st High Trends, 1998-2009
Figure 2.4 shows that none of the CO monitors exceeded the 1-Hour NAAQS.
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Figure 2.5: Carbon Monoxide 1-Hour: 2nd
High Trends, 1998-2009
Figure 2.5 shows that none of the CO monitors exceeded the 1-Hour NAAQS more than once.
Figure 2.6: Carbon Monoxide 8-Hour: 1st High Trends, 1998-2009
Figure 2.6 shows that none of the CO monitors exceeded the 8-Hour NAAQS.
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Figure 2.7: Carbon Monoxide 8-Hour: 2nd
High Trends, 1998-2009
Figure 2.7 shows that none of the CO monitors exceeded the 8-Hour NAAQS more than once.
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2.3 LEAD
Pb is a metal found naturally in the environment. It is also mined and processed for use
in manufactured products such as lead-acid batteries, old lead-based paint, ammunition
and gasoline. Effective January 12, 2009, USEPA tightened the primary and secondary
Pb NAAQS from 1.5 μg/m3
to 0.15 μg/m3, changing the form to a rolling 3-month
average evaluated over a three-year period. Compliance with the Pb NAAQS is met
when daily values collected for 3 consecutive months are averaged and do not exceed
0.15 μg/m3.
BAQP MONITORING NETWORK:
During the reporting period, BAQP did not conduct ambient monitoring for Pb because
the USEPA monitoring thresholds required for monitoring have not been met in any of
the 15 Rural Counties. In addition, the revised NAAQS now require Pb monitoring near
sources such as industrial facilities that emit one-half ton or more of Pb per year and in
Core Based Statistical Areas (CBSA) with populations greater than 500,000.18
In
Nevada’s 15 Rural Counties there are no sources that emit 0.50 tons or more of Pb per
year and no
CBSA’s with populations greater than 500,000.
ATTAINMENT STATUS:
USEPA has not designated any portion of the state of Nevada for the Pb NAAQS.
Designations for the revised 2008 NAAQS are expected to be made by October 15, 2011.
BAQP expects that USEPA will designate all areas in the 15 Rural Counties as
unclassifiable, since the BAQP is not required to monitor for lead.
18
Core Based Statistical Area (CBSA) is a United States Census Bureau term that became effective in
2000 and refers collectively to metropolitan and micropolitan statistical areas. The 2000 census criteria
provide that each CBSA must contain at least one urban area of 10,000 or more population. Each
metropolitan statistical area must have at least one urbanized area of 50,000 or more inhabitants. Each
micropolitan statistical area must have at least one urban cluster of at least 10,000 but less than 50,000
population.
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2.3.1 NATIONAL LEAD TREND
Nationally, average Pb concentrations have decreased substantially over the years. From
1980 to 2008 there was a 92 percent decrease in the national Pb average.19
From 1990 to
2008, there was a 78 percent drop in the national Pb average.20
The reduction in average
Pb concentrations is mainly the result of removing Pb from gasoline used in on-road
vehicles.21
For more information on national air quality trends, visit USEPA’s Air Trends
website.
Figure 2.8: National Lead Trend, 1990-2008
Image courtesy of USEPA, Office of Air and Radiation
19
Based on Annual Maximum 8-Month Average. National Trend based on 19 sites. 20
Based on Annual Maximum 8-Month Average. National Trend based on 64 sites. 21
In addition, in areas above the national standard, stationary source control programs have been
implemented to lower concentrations.
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2.4 NITROGEN DIOXIDE
NO2 belongs to a group of reactive gases known as nitrogen oxides.24
Other nitrogen
oxides include nitric oxide (NO) and nitrous oxide (N2O). In the environment NO2 is the
predominant form.25
NO2 forms rapidly, primarily resulting from fuel combustion
sources. The annual primary and secondary NO2 NAAQS is 53 ppb and was established
in 1971. This standard is met when the average annual concentration does not exceed the
standard.27
Effective April 12, 2010, USEPA established a new 1-hour primary NO2
NAAQS at a level of 100 ppb. Compliance with the 1-hour standard is achieved when 3-
year average of the 98th
percentile of the daily maximum 1-hour average concentration
does not exceed this standard.
BAQP MONITORING NETWORK:
BAQP does not currently monitor for NO2. Historical NO2 monitoring at Stateline and
Carson City was terminated in 1997 due to very low monitored concentrations. BAQP is
not currently required to monitor for NO2 in any of the 15 Rural Counties.
ATTAINMENT STATUS:
USEPA has designated all areas in the 15 Rural Counties and unclassifiable. USEPA
will designate areas for the new 2010 standard by January 2012. BAQP expects its
jurisdiction to remain unclassifiable.
24
Nitrogen oxides are also referred to as oxides of nitrogen. 25
NO2 is the monitored indicator for the larger group of nitrogen oxides. 27
The official level of the annual NO2 standard is 0.053 ppm, equal to 53 ppb, which is shown here for the
purpose of clearer comparison to the 1-hour standard.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.4.1 NATIONAL NITROGEN DIOXIDE TREND
Nationally, average NO2 concentrations have decreased substantially over the years.
From 1980 to 2008 there was a 46 percent decrease in the national NO2 average.28
From
1990 to 2008, there was a 35 percent drop in the national NO2 average.29
The decrease in
average NO2 concentrations is largely the result of improved pollution control technology
in on-road vehicles that has significantly reduced NO2 emissions. Moreover, NO2
concentrations are expected to continue to decrease as a result of a number of new mobile
source regulations. For more information on national air quality trends, visit USEPA’s
Air Trends website.
Figure 2.11: National Nitrogen Dioxide Trend, 1990-2008
Image courtesy of USEPA, Office of Air and Radiation
28
Based on Annual Arithmetic Average. National Trend based on 75 sites. 29
Based on Annual Arithmetic Average. National Trend based on 151 sites.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.5 GROUND-LEVEL OZONE
Ground-level ozone (O3) is a reactive, oxidant gas and is the primary constituent of
photochemical smog.32
Ozone is formed by reactions between nitrogen oxides and
volatile organic compounds (VOCs) in the presence of sunlight. The actual
photochemical reaction that produces O3 can take place far away from where the
precursor gases are emitted. In addition, natural sources such as vegetation, soil,
wildfires, and lightning emit nitrogen oxides and VOCs that lead to the formation of O3.
Another source of localized O3 is downward mixing of O3 from the stratosphere, known
as stratospheric O3 intrusion (especially at high mountain locations).
On June 15, 2005, USEPA revoked the 1-hour O3 standard (0.12 ppm). Prior to the
revocation, the 1-hour NAAQS was attained when the expected number of days per
calendar year with maximum hourly average concentrations above 0.12 ppm was less
than or equal to 1.
In 1997 USEPA created new 8-hour primary and secondary O3 standards, which were set
at 0.08 ppm.33
The 1997 8-hour standards are met when the 3-year average of the 4th
highest daily maximum 8-hour average concentration is less than or equal to 0.084 ppm.
Effective May 27, 2008, USEPA tightened the primary and secondary 8-hour O3 NAAQS
from 0.08 ppm to 0.075 ppm. The 2008 standards are met when the 3-year average of the
4th highest daily maximum 8-hour average concentration is less than the standard.
On January 6, 2010 USEPA proposed to further lower the 8-hour primary O3 standard to
a value in the range of 0.060 ppm to 0.070 ppm and create a new cumulative, seasonal
secondary standard. USEPA has not yet acted on this proposal.
BAQP MONITORING NETWORK:
Between 1998 and 2009, BAQP measured ambient concentrations of O3 at 7 monitors:
Fifth Street in Carson City: 2008-2009
Long Street in Carson City: 1998-200734
West End Elementary School in Fallon: 2005-2009
Fire Station in Fernley: 1998-2003
Intermediate School in Fernley: 2007-2009
Horizon Casino Resort in Stateline: 1998-1999
Cave Rock State Park in Zephyr Cove: 1999-2004
IMPROVE Site in Great Basin National Park: 1998-200935
32
O3 in different layers of the atmosphere (i.e., ground-level O3 versus stratospheric O3) exhibits different
effects. While the physical substance remains the same, ground-level O3 affects man adversely and
therefore is considered a harmful pollutant. On the other hand, stratospheric O3 is essential to human
survival and prevents harmful ultraviolet solar radiation from reaching the earth's surface. 33
For more information on the history of O3 regulation, visit the USEPA webpage: Ozone & Health – A
Timeline. 34
Discontinued monitoring sites listed in italics. 35
Great Basin National Park IMPROVE monitoring site is maintained by the National Park Service.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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ATTAINMENT STATUS:
All areas within the 15 Rural Counties are currently designated attainment/unclassifiable
for the 1997 1-hour O3 NAAQS. The designation process for the 2008 O3 NAAQS is
delayed by a court ordered reconsideration of those standards. EPA is expected to revise
the O3 NAAQS by mid-2011. However, the level chosen by USEPA for the revised 8-
hour O3 NAAQS may result in some areas being classified non-attainment based on the
current monitored levels.
Monitors located in Carson City (Long Street), Churchill, Lyon, and White Pine
Counties record concentrations above the low end (0.060 ppm) of the proposed
range for the primary standard.
Monitors located in White Pine County record annual design concentrations
above the high end (0.070 ppm) of the proposed range for the primary standard.
Monitors located in Carson City (Long Street), Churchill, Lyon, and White Pine
Counties record concentrations above the proposed secondary standard
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.5.1 NATIONAL GROUND-LEVEL OZONE TREND
Nationally, average O3 levels declined in the 1980s, leveled off in the 1990s, and showed
a notable decline after 2002 (Figure 2.14). From 1990 to 2008 the trend resulted in a 14
percent drop in the national 8-hour O3 average.37
Across the United States, programs
have been and are being implemented to reduce NOx and VOCs emissions from motor
vehicles, industrial facilities, and power plants. Figure 2.15 shows emissions for VOCs
by source sector in Nevada. VOCs emissions are used as a surrogate for O3 since O3 is
not directly emitted by sources. Mitigation strategies also include reducing the emission
of O3 precursor gases by reformulating fuels as well as consumer/commercial products
such as paints and chemical solvents that contain VOCs. For more information on
national air quality trends, visit USEPA’s Air Trends website.
Figure 2.14: National Ozone Trend, 1990-2008
Image courtesy of USEPA, Office of Air and Radiation
37
Based on Annual 4th
Maximum 8-Hour Average. National Trend based on 547 sites.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.5.2 OZONE TRENDS IN BAQP’s MONITORING NETWORK
Since 1998, ambient concentrations of O3 have remained relatively steady and below the
revoked 1-hour NAAQS. This trend is apparent at both active monitors (Figures 2.17 and
2.18) and at discontinued monitors (Figures 2.19 and 2.20). Similarly, ambient O3
concentrations are near but below the 1997 and 2008 8-hour NAAQS (Figures 2.21
through 2.24). As discussed in Section 2.5, and can be seen from Figures 2.21 through
2.24, USEPA’s action to further tighten the 8-hour O3 NAAQS would result in several
new non-attainment areas. BAQP is working with UNR to conduct a study to learn how
O3 is generated and transported throughout the state.
Figure 2.17: Ground-Level Ozone 1-Hour: 1st High Trends, 1998-2009
(Active monitors)
Figure 2.17 shows that none of the O3 monitors exceeded the 1-Hour NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.18: Ground-Level Ozone 1-Hour: 2nd
High Trends, 1998-2009
(Active monitors)
Figure 2.18 shows that none of the O3 monitors exceeded the 1-Hour NAAQS more than once.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.19: Ground-Level Ozone 1-Hour: 1st High Trends, 1998-2009
(Discontinued monitors)
Figure 2.19 shows that none of the O3 monitors exceeded the 1-Hour NAAQS.
Figure 2.20: Ground-Level Ozone 1-Hour: 2nd
High Trends, 1998-2009
(Discontinued monitors)
Figure 2.20 shows that none of the O3 monitors exceeded the 1-Hour NAAQS more than once.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.21: Ground-Level Ozone 8-Hour: 4th
High Trends, 1998-2009
(Active monitors)
Figure 2.21 shows that the 4
th highest annual 8-hour concentration of O3 was below the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.22: Ground-Level Ozone 8-Hour: Design Value Trends, 1998-2009
(Active monitors)
Figure 2.22 shows that the 8-hour O3 values are below the NAAQS.
Figure 2.23: Ground-Level Ozone 8-Hour: 4th
High Trends, 1998-2009
(Discontinued monitors)
Figure 2.23 shows that the 4th
highest annual 8-hour concentrations of O3 are below the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.24: Ground-Level Ozone 8-Hour: Design Value Trends, 1998-2009 (Discontinued monitors)
Figure 2.24 shows that the 8-hour O3 values was below the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.6 PARTICULATE MATTER
Particulate matter generally consists of a mixture of particles of dust, pollen, ash, soot,
metals and other various solid and liquid chemicals found in the atmosphere.40
There are
two categories of particle matter pollutants: PM2.5 and PM10. PM2.5 (also known as “fine
particulate”) is particulate matter 2.5 microns or smaller in aerodynamic diameter. PM10
(also known as “inhalable coarse particulate”) is particulate matter 10 microns or smaller
in aerodynamic diameter. For reference, ten microns is about one-seventh the diameter
of human hair.
PM2.5 can be directly emitted from sources such as forest fires, construction sites,
residential wood combustion, or unpaved roads. These particles are referred to as
primary particles. PM2.5 can also form in the atmosphere as the result of the interaction
of pollutants (such as SO2, NOx, and VOCs) with other compounds in the air. These
particles are referred to as secondary particles and represent the majority of PM2.5
pollution in the United States. PM2.5 can remain suspended in the air and be transported
extremely long distances.
Like PM2.5, PM10 consists of primary and secondary particles. While many PM10
emissions are from man-made sources (e.g., salt and sand deposited on roads to reduce
driving hazards in winter, vehicles traveling on unpaved roads, construction dust, and
rock processing), other PM10 pollution comes from indirect sources such as motor
vehicles that entrain particles which have been deposited on roads. Meteorological
conditions can have a significant effect on ambient particulate concentrations.
USEPA first issued standards for particulate matter in 1971 and revised the standards in
1987 and 1997. Effective September 16, 1997, new standards for PM2.5 were established.
Effective December 18, 2006, USEPA reduced the 24-hour PM2.5 NAAQS from 65
µg/m3 to 35 µg/m
3. The 24-hour PM2.5 NAAQS is met when the 3-year average of the
98th percentile 24-hour concentration is less than or equal to the standard. The annual
PM2.5 NAAQS is met when the 3-year average of the weighted annual mean PM2.5
concentration is less than or equal to the standard. The secondary PM2.5 NAAQS are the
same as the primary PM2.5 NAAQS.
Compliance with the 1997 annual PM10 NAAQS was met when the 3-year average of the
annual mean PM10 concentrations is less than or equal to 50 µg/m3. However, the annual
PM10 NAAQS (50 µg/m3) was revoked in 2006. The primary 24-hour PM10 NAAQS is
met when the expected number of days per calendar year above 150 μg/m3 is less than or
equal to one, over a 3-year period. The secondary 24-hour PM10 NAAQS are the same as
the primary PM10 NAAQS.
USEPA is currently initiating another review of the particulate matter standards.
40
The majority of compounds that form particle pollution can be grouped into five categories: sulfates,
nitrates, elemental carbon, organic carbon, and “crustal” material.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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BAQP MONITORING NETWORK:
Between 1998 and 2009, BAQP measured ambient concentrations of PM2.5 at 5 monitors:
Fifth Street in Carson City: 2009
Long Street in Carson City: 1998-2009
Intermediate School in Fernley: 1999-2009
Gardnerville Ranchos in Gardnerville: 1998-2009
Cave Rock State Park in Zephyr Cove: 2000-2001
The Fifth Street, Gardnerville Ranchos, and Fernley Intermediate School PM2.5 monitors
are maintained within BAQP’s network for special purpose monitoring.
Between 1998 and 2009, BAQP measured ambient concentrations of PM10 at 21
monitors:
Police & Fire Station in Battle Mountain: 199841
High School in Battle Mountain: 1998-2002
Bordewich School in Carson City: 1998
Long Street in Carson City: 1998
State Offices Building in Elko: 1998-2008
Grammar School No. 2 in Elko: 2008-2009
West End Elementary School in Fallon: 1998
Intermediate School in Fernley: 1998
Gardnerville Ranchos in Gardnerville: 1998
Elementary School Monitor #1 in McGill: 1998
Elementary School Monitor #2 in McGill: 1998
Dispatch Center in Minden: 1998
Community Pool in Pahrump: 2001-2004
Linda Street in Pahrump: 2004-2009
Willow Creek in Pahrump: 2004-2009
Church in Pahrump: 2004-2009
Manse Elementary School in Pahrump: 2005-2009
Glenoaks Street in Pahrump: 2009
Horizon Casino Resort Monitor #1 in Stateline: 1998
Horizon Casino Resort Monitor #1 in Stateline: 1998
Cave Rock State Park in Zephyr Cove: 2000-2001
ATTAINMENT STATUS:
On April 5, 2005, USEPA designated all areas within the 15 Rural Counties as
attainment/unclassifiable for the 1997 24-hour and PM2.5 NAAQS. On December 13,
2009, USEPA designated all areas within the 15 Rural Counties as
attainment/unclassifiable for the revised 2006 24-hour PM2.5 NAAQS.
41
Discontinued monitoring sites listed in italics.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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On November 15, 1990, USEPA designated all areas within the 15 Rural Counties as
unclassifiable for PM10.
Beginning in 2001, BAQP began special purpose monitoring in the Pahrump Valley in
Nye County. This monitoring indicated exceedances of the PM10 NAAQS. To correct
the problem quickly the USEPA, the BAQP, the Pahrump Town Board, and Nye County
agreed to implement control measures throughout the valley to address the exceedances.
The measures generally consisted of: paving roads, land disturbance mitigation and dust
control enforcement. Continued monitoring indicates that the control strategies that have
been implemented have resulted in significant reductions in the number of monitored
PM10 exceedances. Remaining exceedances are related to uncontrollable high-wind
events.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.6.1 NATIONAL PM2.5 TREND
Nationally, average PM2.5 concentrations have decreased since 2000. From 2000 to 2008
there was a 19 percent decrease in the national PM2.5 average.44
The reduction in average
PM2.5 concentrations is mainly the result of regional and national rules that have been and
are being implemented to reduce emissions of pollutants that form PM2.5. In addition, a
number of voluntary programs also are helping to reduce PM2.5 pollution.45
For more
information on national air quality trends, visit USEPA’s Air Trends website.
Figure 2.25: National PM2.5 Trend, 2000-2008
Image courtesy of USEPA, Office of Air and Radiation
44
Based on Seasonally-Weighted Average. National Trend based on 728 sites. 45
For more information, visit USEPA’s website on Reducing Particle Pollution.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.6.2 PM2.5 TRENDS IN NEVADA’S 15 RURAL COUNTIES
PM2.5 trends across the state are varied and likely reflect localized conditions such as
wintertime temperature inversions. Since 1998, the PM2.5 levels at Long Street and
Gardnerville Ranchos have trended upwards (Figures 2.29 and 2.30)48
and are
approaching the current 24-hour standard. In contrast, the PM2.5 levels since 1998 at
Fernley Intermediate School are trending downwards and are well below the NAAQS.
48
The design value for PM2.5 is the 3-year average of the 98th percentile 24-hour concentration.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.28: 24-hr PM2.5 98th
Percentile Trends, 1998-2009
Figure 2.28 shows the 98
th Percentile concentration of PM2.5 in relation to the NAAQS.
Figure 2.29: Long Street PM2.5 Design Value Trends, 1998-2009
Figure 2.29 shows the Long Street PM2.5 Design Value in relation to the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.30: Gardnerville Ranchos PM2.5 Design Value Trends, 1998-2009
Figure 2.30 shows the Gardnerville Ranchos PM2.5 Design Value in relation to the NAAQS.
Figure 2.31: Fernley Intermediate School PM2.5 Design Value Trends, 1998-2009
Figure 2.31 shows the Fernley Intermediate School PM2.5 Design Value in relation to the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.32: PM2.5 Annual Mean Trends, 1998-2009
Figure 2.32 shows the PM2.5 Annual Mean concentration in relation to the NAAQS.
Figure 2.33: PM2.5 3-Year Average of Annual Mean Trends, 1998-2009
Figure 2.33 shows the 3-Year average of PM2.5 Annual Mean concentration in relation to the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.6.3 NATIONAL PM10 TREND
Nationally, average PM10 concentrations have decreased over the years. From 1990 to
2008 there was a 31 percent decrease in the national PM10 average.49
The reduction in
average PM10 concentrations is mainly the result of regional and national rules that have
been and are being implemented to reduce emissions of pollutants that form PM10. In
addition, a number of voluntary programs also are helping to reduce PM10 pollution.50
For more information on national air quality trends, visit USEPA’s Air Trends website.
Figure 2.34: National PM10 Trend, 1990-2008
Image courtesy of USEPA, Office of Air and Radiation
49
Based on Annual 2nd
Maximum 24-Hour Average. National Trend based on 325 sites. http://www.epa.gov/airtrends/pm.html. 50
For more information, visit USEPA’s website on Reducing Particle Pollution.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.6.4 PM10 TRENDS IN BAQP’s MONITORING NETWORK
PM10 measurements are typically influenced by local conditions. In general, 24-hour
concentrations of PM10 in Elko, Battle Mountain and Lake Tahoe have remained below
the standard. Because short-term averages are largely influenced by localized, short-term
events, annual mean concentrations (Figures 2.39 and 2.42) provide a good indicator of
ambient PM10 trends. These indicate a flat to decreasing trend.
For currently active sites in the community of Pahrump, the Church, and Manse
Elementary School sites show a definite downward annual trend from 2004 and 2005
respectively through 2009. The discontinued Willow Creek site recorded a similar
downward trend during 2004 through 2008. The Linda Street site, however, shows an
upward trend during that same period. The Community Pool site in Pahrump was
relocated to the Manse site because the site location did not conform to USEPA siting
criteria and for a lack of continued access.
Figure 2.37: PM10 1st High Trends, 1998-2009
(Active monitors)
Figure 2.37 shows the highest 24-hour concentration of PM10 in relation to the NAAQS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.38: PM10 2nd
High Trends, 1998-2009
(Active monitors)
Figure 2.38 shows the second highest 24-hour concentration of PM10 in relation to the NAAQS.
Table 2.2: Number of Exceedances of the PM10 24-Hour Standard, 1998-2009
(Active Monitors)
Elko
Grammar
School #2
Linda
Street Church
Manse
Elementary
School
Glenoaks
Street
2004-2006 --- 0 0 --- ---
2005-2007 --- 0 0 0 ---
2006-2008 --- 0 0 0 ---
2007-2009 --- 0 0 1 ---
To attain the 2006 24-Hour NAAQS, concentrations of PM10 must not exceed 150 µg/m3 more than once
per year on average over 3 years.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.39: PM10 Annual Mean Trends, 1998-2009
(Active monitors)
Figure 2.39 shows the PM10 Annual Mean concentration in relation to the NAAQS.
Please note that the annual PM10 NAAQS was revoked effective December 17, 2006.
Table 2.3: 3-Year Average of the Annual Mean PM10 Concentrations, 1998-2009
(Active monitors)
Elko
Grammar
School #2
Linda
Street Church
Manse
Elementary
School
Glenoaks
Street
2004-2006 --- 14 21 --- ---
2005-2007 --- 16 21 41 ---
2006-2008 --- 17 20 33 ---
2007-2009 --- 21 17 32 ---
The 1997 annual PM10 NAAQS is met when the 3-year average of the annual mean PM10 concentrations at
each monitoring site is less than or equal to 50 µg/m3.
Please note that the annual PM10 NAAQS was revoked effective December 17, 2006.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.40: 24-hr PM10 1st High Trends, 1998-2009
(Discontinued monitors)
Figure 2.40 shows the highest 24-hour concentration of PM10 in relation to the NAAQS.
Figure 2.41: 24-hr PM10 2nd
High Trends, 1998-2009
(Discontinued monitors)
Nevada Air Quality Trend Report, 1998-2009
January 2011
41
Figure 2.41 shows the second highest 24-hour concentration of PM10 in relation to the NAAQS.
Table 2.4: Number of Exceedances of the PM10 24-Hour Standard
(Discontinued monitors)
Battle
Mountain
High School
State Offices
Building
Community
Pool
Willow
Creek
1998-2000 1 0 --- ---
1999-2001 1 0 4 ---
2000-2002 1 1 18 ---
2001-2003 --- 1 21 ---
2002-2004 --- 1 14 ---
2003-2005 --- 0 19 ---
2004-2006 --- 0 2 2
2005-2007 --- 0 --- 1
2006-2008 --- 0 --- 1
To attain the 2006 24-Hour NAAQS, concentrations of PM10 must not exceed 150 µg/m3 more than once
per year on average over 3 years.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Figure 2.42: PM10 Annual Mean Trends, 1998-2009
(Discontinued monitors)
Figure 2.42 shows the PM10 Annual Mean concentration in relation to the NAAQS.
Table 2.5: 3-Year Average of the Annual Mean PM10 Concentrations 1998-2009
(Discontinued monitors)
Battle
Mountain
High
School
Elko State
Offices
Building
Community
Pool
Willow
Creek
Cave Rock
State Park
1998-2000 21 24 --- --- ---
1999-2001 23 25 --- --- ---
2000-2002 21 24 --- --- ---
2001-2003 --- 22 --- --- ---
2002-2004 --- 21 --- --- ---
2003-2005 --- 20 --- --- ---
2004-2006 --- 23 --- 28 ---
2005-2007 --- 24 --- 26 ---
2006-2008 --- 22 --- 24 ---
The 1997 annual PM10 NAAQS is met when the 3-year average of the annual mean PM10 concentrations at
each monitoring site is less than or equal to 50 µg/m3.
Please note that the annual PM10 NAAQS was revoked effective December 17, 2006.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.7 SULFUR DIOXIDE
Sulfur oxides commonly originate from burning fossil fuels and are also produced from
various industrial processes. SO2 is the measured criteria pollutant of concern. In the air,
SO2 reacts with oxygen, ammonia and other compounds, including water vapor, to form
sulfate salts and sulfuric acid mist. Sources of SO2 include metal smelters, oil refineries,
and large oil- or coal-fired power plants.53
Effective August 23, 2010, USEPA
established a new 1-hour primary standard for SO2 at a level of 75 ppb, revoked the
existing 24-hour and annual standards and retained the 3-hour average secondary
standard. To attain the primary standard, the 3-year average of the 99th
percentile of the
daily maximum 1-hour average at each monitor within an area must not exceed 75 ppb.
To attain the secondary standard, an average concentration of 0.5 ppm must not be
exceeded over a 3-hour period.
BAQP MONITORING NETWORK:
The BAQP is not currently required to monitor for SO2 in any of the 15 Rural Counties.
However, the US Forest Service monitors SO2 at the Jarbidge Wilderness area through
the IMPROVE network.
ATTAINMENT STATUS:
With the exception of the central Steptoe Valley (near Ely), USEPA has designated all
areas in the 15 Rural Counties as unclassifiable. Prior to 2002, the central Steptoe Valley
was designated by USEPA as SO2 non-attainment due to the historic operation of a
copper smelter at McGill. The smelter ceased operation in 1983 and BAQP requested
reclassification of the area to attainment. USEPA approved the request on April 12,
2002. USEPA will designate areas for the new 2010 standard in 2012. BAQP expects its
jurisdiction to remain unclassifiable.
53
Across the United States, the largest sources of SO2 emissions are from fossil fuel combustion at power
plants (66%) and other industrial facilities (29%). Smaller sources of SO2 emissions include industrial
processes such as extracting metal from ore as well as the burning of high sulfur containing fuels by
locomotives, large ships, and nonroad equipment.
Nevada Air Quality Trend Report, 1998-2009
January 2011
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2.7.1 NATIONAL SULFUR DIOXIDE TREND
Nationally, average SO2 concentrations have decreased over the years. From 1980 to
2008 there was a 71 percent decrease in the national SO2 average.54
From 1990 to 2008
there was a 59 percent decrease in the national SO2 average.55
The reduction in average
SO2 concentrations is mainly the result of switching to low sulfur fossil fuels especially
in on-road and off-road vehicles. For more information on national air quality trends,
visit USEPA’s Air Trends website.
Figure 2.41: National Sulfur Dioxide Trend, 1990-2008
Image courtesy of USEPA, Office of Air and Radiation
54
Based on Annual Arithmetic Average. National Trend based on 141 sites. 55
Based on Annual Arithmetic Average. National Trend based on 266 sites.
Nevada Air Quality Trend Report, 1998-2009
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APPENDIX A
Nevada Air Quality Trend Report, 1998-2009
January 2011
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Nevada Air Quality Trend Report, 1998-2009
January 2011
47
MONITORING STATION DESCRIPTIONS
Police & Fire Station, Battle Mountain 32-015-0002 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1985-1998
Project Type = Population Oriented Surveillance
Measurement Scale = Neighborhood
Located at 25 East Second Street in Battle Mountain, this PM10 site was at the Police &
Fire Station. This site was situated less than one block from the intersection of the two
most heavily traveled streets (exclusive of the interstate highway) near commercial,
industrial, and residential areas. PM10 sampling commenced at this site in June 1985. Due
to siting concerns, this site was discontinued effective the end of September 1998 and
was relocated to Battle Mountain High School.
Nevada Air Quality Trend Report, 1998-2009
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High School, Battle Mountain
32-015-0004 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1998-2002
Project Type = Population Oriented Surveillance
Measurement Scale = Neighborhood
Located at 625 Weaver Avenue in Battle Mountain, this PM10 site was on the grounds of
Battle Mountain High School. This site was at the edge of a residential neighborhood,
near the intersection of Interstate Highway 80 and Nevada Highway 305. The TEOM
continuous PM10 monitor was sited on the announcer's tower at the school’s athletic field.
Monitoring commenced on August 20, 1998 and was discontinued in 2002.
Nevada Air Quality Trend Report, 1998-2009
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Fifth Street, Carson City
32-510-0002 (SLAMS/SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1981-1989 1974-1989,
2008-2009 2009 1991-1997
Project Type = Population Oriented Surveillance (Typical Concentration)
Measurement Scale = Neighborhood
Located at 3300 East Fifth Street in Carson City, this CO, O3, and PM2.5 site is near the
Carson City Public Works Department maintenance yard. In addition, meteorological
data is collected at the Fifth Street site. This site is situated in a transition area that is
adjacent to the maintenance yard, a sewage treatment plant, residential neighborhoods,
wetlands, and the new extension of Highway 580. CO and O3 were monitored from 1974
through 1989. PM10 monitoring commenced in March 1991 and was discontinued at the
end of February 1997. In 2006, an existing meteorological station was restarted. In 2008,
O3 monitoring commenced at the Fifth Street site. In 2009, PM2.5 monitoring commenced
at the Fifth Street site57
.
57
The O3 and PM2.5 monitors were relocated from the Long Street site.
Nevada Air Quality Trend Report, 1998-2009
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Bordewich School, Carson City
32-510-0003 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1994-1998
Project Type = Population Oriented Surveillance
Measurement Scale = Neighborhood
Located at 110 Thompson Drive in Carson City, this PM10 site was on the grounds of the
Bordewich-Bray Elementary School. This site was in a residential neighborhood. PM10
monitoring commenced in September 1994 and was discontinued at the end of March
1998.
Nevada Air Quality Trend Report, 1998-2009
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Long Street, Carson City 32-510-0004 (SLAMS/SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1997-2008 1997-1998 1997-2007 1998-2009 1997-1998
Project Type = Highest Concentration and Population Oriented Surveillance (Typical
Concentrations)
Measurement Scale = Neighborhood (Urban) (Middle)
Located at 875 East Long Street in Carson City, this CO, O3, NO2, PM2.5, and PM10 site
was in the Sierra Pacific Power Company yard. This site monitored highest
concentrations and population exposure downwind of the main traffic corridors and the
commercial part of the city. This site began monitoring for CO, O3, NO2, and PM10 in
1997. PM2.5 monitoring commenced in January 1998. NO2 monitoring was discontinued
in October 1997 and PM10 sampling was discontinued at the end of June 1998. The Long
Street O3 monitor was relocated to the Fifth Street site after the 2007 O3 season.58
In
2008, NDEP requested USEPA for discontinuation of CO monitoring based upon no
violations of the NAAQS from 2002 to 2007. USEPA allowed CO monitoring to be
discontinued at the end of 2008. In the summer of 2009, the Long Street site was
discontinued and the PM2.5 monitor was relocated to the Fifth Street.
58
The Long Street O3 monitor was relocated due to concern that trees adjacent to the site may have been
interfering with the O3 sampling.
Nevada Air Quality Trend Report, 1998-2009
January 2011
52
State Offices Building, Elko 32-007-0004 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1992-2008
Project Type = Population Oriented Surveillance
Measurement Scale = Urban
Located at 850 Elm Street in Elko, this continuous PM10 site was on the roof of the state
offices building. This site was situated in a predominantly residential area. PM10
sampling commenced at this site in November 1992. This monitor was previously located
at the Fire Station at 723 Railroad Street (ID #32-007-0003) in a commercial area. It was
moved to the State Offices Building at 850 Elm Street in November 1992. At the end of
1998, the manual PM10 sampler was replaced with a TEOM continuous PM10 monitor. In
September 2008, the TEOM monitor was closed and a new beta attenuation monitor was
sited at the Elko Grammar School #2.
Nevada Air Quality Trend Report, 1998-2009
January 2011
53
Elko Grammar School #2, Elko 32-007-0005 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2008-2009
Project Type = Population Oriented Surveillance (Typical Concentration)
Measurement Scale = Neighborhood
Located at 1055 7th
Street in Elko, this PM10 site is on the grounds of Elko Grammar
School #2. This site is situated in a residential neighborhood. PM10 monitoring
commenced at this site in September 2008 when the beta attenuation monitor was
installed.
Nevada Air Quality Trend Report, 1998-2009
January 2011
54
West End Elementary School, Fallon 32-001-0002 (SLAMS/SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1999-2009 1993-1998
Project Type = Population Oriented Surveillance
Measurement Scale = Urban
Located at 280 South Russell Street in Fallon, this O3 and PM10 site is on the grounds of
the West End Elementary School. This site is situated in a residential neighborhood that
may at times be affected by agricultural operations surrounding the town. PM10 sampling
(SLAMS) commenced at this site in May 1993 and was discontinued at the end of June
1998. Monitoring for O3 (SPMS) began in October 1999 as an O3 transport site
downwind of Reno and Fernley. In 2008, the O3 monitor was reclassified as a SLAMS.
Nevada Air Quality Trend Report, 1998-2009
January 2011
55
Fire Station, Fernley (SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1998-2003
Project Type = Highest Concentration and Population Oriented Surveillance
Measurement Scale = Urban
Located at 195 East Main Street in Fernley, this O3 site was at the North Lyon County
Fire Protection District Station. This site was generally downwind from Reno at the end
of a canyon corridor that includes large industrial sources. O3 monitoring commenced in
September 1997 and was discontinued at the end of September 2003.
Nevada Air Quality Trend Report, 1998-2009
January 2011
56
Intermediate School, Fernley 32-019-0006 (SLAMS/SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2004,
2007-2009 1999-2009 1995-1998
Project Type = Population Oriented Surveillance
Measurement Scale = Urban
Located at 320 Hardie Lane in Fernley, this O3, PM2.5, and PM10 site is on the grounds of
Fernley Intermediate School. This site is situated in a residential and agricultural area that
has experienced recent industrial growth. Sampling for PM10 commenced at this site in
May 1995 to determine agricultural and industrial source impacts and population
exposure. PM10 sampling was discontinued in November 1998. PM2.5 monitoring (SPMS)
commenced in June 1999. O3 monitoring (SLAMS) occurred during 2004 and resumed in
July 2007.
Nevada Air Quality Trend Report, 1998-2009
January 2011
57
Gardnerville Ranchos, Gardnerville 32-005-0007 (SLAMS/SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1998-2009 1995-1998
Project Type = Population Oriented Surveillance (Typical Concentration)
Measurement Scale = Neighborhood
Located at 820 Lyell Way in Gardnerville, this PM2.5 and PM10 site is in Aspen Park in
the Gardnerville Ranchos. This site is situated in a residential neighborhood. PM10
monitoring (SLAMS) commenced at this site in December 1995 and was discontinued at
the end of June 1998. Monitoring for PM2.5 (SPMS) commenced in January 1998.
Nevada Air Quality Trend Report, 1998-2009
January 2011
58
IMPROVE Site, Great Basin National Park 32-033-0101 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1998-2009
Project Type = Background
Measurement Scale = Regional
Located at the Lehman Caves in the Great Basin National Park near Baker, the National
Park Service started O3 sampling in 1998.
Nevada Air Quality Trend Report, 1998-2009
January 2011
59
McGill Elementary School, McGill 32-033-0002 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1993-1998
Project Type = Population Oriented Surveillance and Source Impact
Measurement Scale = Neighborhood
Located at 25 F Avenue in McGill, this PM10 site was on the grounds of McGill
Elementary School. This site is situated in a residential area in close proximity to a closed
mining operation. The town of McGill is potentially subject to blowing dust from mine
tailings. The monitoring objectives were to monitor the residual impact of the former
mining operation and to ascertain population exposure. PM10 sampling commenced at
this site in June 1993 and was discontinued at the end of March 1998.
Nevada Air Quality Trend Report, 1998-2009
January 2011
60
Dispatch Center, Minden (32-005-0005 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1993-1998
Project Type = Population Oriented Surveillance
Measurement Scale = Urban
Located at 1615 Eighth Street in Minden, this PM10 site is on the roof of a county
communications building. This site is situated less than a block from US Highway 395 in
a commercial/residential neighborhood. PM10 sampling commenced at this site in July
1993 and was discontinued at the end of March 1998.
Nevada Air Quality Trend Report, 1998-2009
January 2011
61
Law Enforcement Building, Minden (SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1998-1999
Project Type = Population Oriented Surveillance
Measurement Scale = Urban
Located at 1625 Eighth Street in Minden, this CO site was on the roof of the Douglas
County Law Enforcement Building. This site is situated less than a block from US
Highway 395 in a commercial neighborhood. The site adjoins two large commercial
enterprises, a hotel-casino and an electronics manufacturer. CO monitoring commenced
at the beginning of 1998 and was discontinued at the end of 1999.
Nevada Air Quality Trend Report, 1998-2009
January 2011
62
Community Pool, Pahrump (32-023-0010 SPMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2001-2004
Project Type = Highest Concentration
Measurement Scale = Neighborhood
Located at 250 North Highway 160 in Pahrump, this PM10 site was on the grounds of the
municipal swimming pool and recreation complex. The continuous beta attenuated
monitor was sited on the roof of a dressing room. This site was situated in a commercial
neighborhood behind the County offices. PM10 monitoring commenced in January 2001
and ended in November 2004. The site was closed due to reconstruction of the pool-
building from a flat to a pitched roof.
Nevada Air Quality Trend Report, 1998-2009
January 2011
63
Linda Street, Pahrump (32-023-0011 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2003-2009
Project Type = Background
Measurement Scale = Regional
Located at 8825 North Linda Street in Pahrump, this PM10 site is on the premises of a
private residence. The continuous beta attenuated monitor is sited on the roof of an old
railroad box car. This location is the most rural and northern-most site in the Pahrump
Valley monitoring network. There are some residential plats surrounding this site, but the
area mainly consists of native desert vegetation with little or no land surface disturbances.
There are gravel roads in the area, but they experience little traffic. PM10 monitoring
commenced in May 2003.
Nevada Air Quality Trend Report, 1998-2009
January 2011
64
Willow Creek, Pahrump (32-023-0012 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2004-2009
Project Type = Highest Concentration and Population Oriented Surveillance (Typical
Concentration)
Measurement Scale = Urban
Located at 1500 Red Butte in Pahrump, this PM10 site was on the Willow Creek Golf
Course. The continuous beta attenuated monitor was sited on the roof of a pump house
for the golf course between fairways. PM10 monitoring commenced in December 2003.
The Willow Creek Golf Course is surrounded by residential plats and vacant land. While
the Community Pool site was in operation, the purpose of the Willow Creek site was to
determine population exposure in central Pahrump. After the Community Pool site was
closed in November 2004, the purpose of the Willow Creek site became monitoring the
highest concentrations. In July 2009, the Willow Creek site was relocated to a new site on
the golf course, 410 South Glenoaks Street, approximately one-third of a mile southwest
of the original site.
Nevada Air Quality Trend Report, 1998-2009
January 2011
65
Church, Pahrump (32-023-0013 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2004-2009
Project Type = Source Impact
Measurement Scale = Neighborhood
Located at 781 East Gamebird in Pahrump, this PM10 site is on the grounds of Our Lady
of the Valley Catholic Church. The continuous beta attenuated monitor is sited in the
southeast corner of the Catholic Church lot. This site is situated in a residential area with
some commercial plats and native desert. There is a mix of paved and dirt roads in the
vicinity. The Church Site began operation in 2004 to complement the existing three other
sites in the Pahrump Valley monitoring network. This PM10 site is the southern-most
monitoring site in the Pahrump Valley.
Nevada Air Quality Trend Report, 1998-2009
January 2011
66
Manse Elementary School, Pahrump (32-023-0014 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2005-2009
Project Type = Highest Concentration
Measurement Scale = Middle
Located at 1020 East Wilson Road in Pahrump, this PM10 site is on the grounds of the
Manse Elementary School. This site replaced the Community Pool site. The continuous
beta attenuated monitor is sited on the roof of the school. This site is situated adjacent to
the busiest activity area of Pahrump in a mostly commercial area, with some residential
plats. This PM10 site is located downwind from land surface disturbances such as
residential construction developments that have cleared large swaths of ground and
agricultural lands. There is a mix of paved and dirt roads in the vicinity.
Nevada Air Quality Trend Report, 1998-2009
January 2011
67
Glenoaks Street, Pahrump (32-023-0015 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
2009
Project Type = Population Oriented Surveillance (Typical Concentration)
Measurement Scale = Neighborhood
Located at 410 South Glenoaks Street in Pahrump, this PM10 monitor is on the Willow
Creek Golf Course. In July 2009, this site replaced the original Willow Creek site which
was located approximately one-third of a mile to the northeast. The continuous beta
attenuated monitor is sited on the grounds of the wastewater treatment plant. PM10
monitoring commenced in October 2009.
Nevada Air Quality Trend Report, 1998-2009
January 2011
68
Horizon Casino Resort, Stateline (32-005-0004 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1982-1999 1990-1997 1981-1999 1988-1999
Project Type = Population Oriented Surveillance and Source Impact
Measurement Scale = Micro
Located at 50 Highway 50 in Stateline, this CO, NO2, O3, and PM10 site was on the
grounds of the Horizon Casino Resort. The monitors were sited on the northeast edge of
the Horizon Casino Resort parking lot, downwind of the casino core area and downtown
US Highway 50. The monitoring objectives were to determine the impact of the casinos
and associated vehicular traffic on the air quality and to ascertain population exposure.
Monitoring for O3 commenced in June 1981; for CO, in March 1982; for PM10, in
September 1988; and for NO2, in January 1990. NO2 monitoring was discontinued in
October 1997, and PM10 sampling was discontinued at the end of March 1998.
Monitoring for O3 and CO was discontinued in June 1999, and the site was closed in
favor of new monitoring sites at Harvey's Resort Hotel and at Cave Rock State Park.
Nevada Air Quality Trend Report, 1998-2009
January 2011
69
Harvey’s Resort Hotel, Stateline (32-005-0009 SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1999-2009
Monitoring Objective = Highest Concentration
Measurement Scale = Micro
Located at 18 Highway 50 in Stateline, this CO site is on the 1st level of Harvey’s Resort
and Hotel’s parking garage facing the highway. This is a "micro-scale" monitoring site
for CO in the core of the Stateline casino hotel area at Lake Tahoe. The site is designed to
monitor the highest CO concentrations at Lake Tahoe, and is taken to be representative of
both the California and Nevada sides of the south shore casino district. CO monitoring at
this site commenced in October 1999 and was previously is conducted by the California
Air Resources Board by multi-agency cooperative agreement. Starting in July 2006,
NDEP took over the monitoring responsibility for this site under a maintenance
agreement with EPA.
Nevada Air Quality Trend Report, 1998-2009
January 2011
70
Cave Rock State Park, Zephyr Cove 32-005-0008 (SLAMS)
Pollutant(s) Monitored CO NO2 O3 PM2.5 PM10
1999-2004 2000-2001 2000-2001
Project Type = Regional Transport
Measurement Scale = Regional
Located at Cave Rock State Park in Zephyr Cove, this O3, PM2.5, and PM10 site was on
the boat launch facility. This site monitored O3 transport from upwind California urban
areas. O3 monitoring commenced in July 1999 and was discontinued at the end of
February 2004. PM2.5 and PM10 monitoring commenced at the end of 1999. PM2.5
monitoring was discontinued on January 15, 2002. PM10 monitoring was discontinued on
January 22, 2002.
Nevada Air Quality Trend Report, 1998-2009
January 2011
71
APPENDIX B
Nevada Air Quality Trend Report, 1998-2009
January 2011
72
Nevada Air Quality Trend Report, 1998-2009
January 2011
73
MONITORING DATA AVAILABILITY
The following table lists years during which air quality monitors were operated for the
pollutant indicated.
Station Name / Location Site # O3 NO2 CO PM10 PM2.5
BATTLE MOUNTAIN
Police & Fire Station / 25 E. Second St. 32-015-0002 1 85-98
High School / 625 Weaver Ave. 32-015-0004 98-02
CARSON CITY
Fifth Street / 3300 E. Fifth St. 32-510-0002 74-89, 08-09 81-89 91-97 09
Bordewich School / 110 Thompson Dr. 32-510-0003 94-98
Long Street / 875 E. Long St. 32-510-0004 97-07 97-98 97-08 97-98 98-09
Ann Street / E. Ann St. SPMS 90-93
Roberts House / Hwy 395 & Corbett St. SPMS 89, 94-96
ELKO
State Offices Building / 850 Elm St. 32-007-0004 92-08
Grammar School No. 2 / 1055 Seventh St. 32-007-0005 08-09
FALLON
West End School / 280 S. Russell St. 32-001-0002 99-09 93-98
FERNLEY
Intermediate School / 320 Hardie Lane 32-019-0006 07-09 95-98 99-09
Fire Station / 163 E. Main St. SPMS 98-03
GARDNERVILLE
Mitch Drive / 931 Mitch Dr. 32-005-0006 94-96
Gardnerville Ranchos / 820 Lyell Way 32-005-0007 95-98 98-09
GREAT BASIN NATIONAL PARK
Lehman Caves / Maintenance Bldg. 32-033-0007 93-95
Lehman Caves / IMPROVE Site 32-033-0008 95-97
Lehman Caves / IMPROVE Site 32-033-0101 93-09
Notes:
1 - A blank space indicates the specific pollutant has not been monitored for at that site.
Air Quality Monitoring Data Availability
Nevada Air Quality Trend Report, 1998-2009
January 2011
74
Station Name / Location Site # O3 NO2 CO PM10 PM2.5
LOVELOCK
Post Office / Main St. & Dartmouth Ave. 32-027-0002 91-97
High School / 1215 Frank lin Ave. 32-027-0003 2
McGILL
Elementary School / 25 F Ave. 32-033-0002 93-98
MINDEN
Dispatch Center / 1615 Eighth St. 32-005-0005 93-98
Law Enforcement Building / 1625 Eighth St. SPMS 98-99
PAHRUMP
Community Pool / 250 N. Hwy 160 32-023-0010 01-04
Linda Street / 8825 N. Linda St. 32-023-0011 03-09
Willow Creek / 1500 Red Butte 32-023-0012 04-09
Church / 781 E. Gamebird Rd. 32-023-0013 04-09
Manse School / 1020 E. Wilson Rd. 32-023-0014 05-09
Glenoaks Street / 410 S. Glenoaks St. 32-023-0015 09
STATELINE
Horizon Casino Resort / 50 Hwy 50 32-005-0004 81-99 90-97 82-99 88-99
Harvey's Resort Hotel / 18 Hwy 50 32-005-0009 99-09
ZEPHYR COVE
Cave Rock State Park / Boat Ramp 32-005-0008 99-04 00-01 00-01
Notes:
2 - Data collected was deemed invalid by USEPA.
Air Quality Monitoring Data Availability continued
Nevada Air Quality Trend Report, 1998-2009
January 2011
75
APPENDIX C
Nevada Air Quality Trend Report, 1998-2009
January 2011
76
MONITORING DATA
Table C1: Monitoring Methods Used in Nevada, 1998-2009
Pollutant Method Units
CO Gas Nondispersive Infrared Radiation ppm
O3 UV Absorption ppm
PM2.5 Met-One BAM 1020 µg/m3
PM2.5 Met-One ES-640 µg/m3
PM10 Reference - Hi Vol Andersen/GMW 1200 µg/m3
PM10 R&P TEOM Mass Transducer µg/m3
Nevada Air Quality Trend Report, 1998-2009
January 2011
77
Carbon Monoxide
There is one active CO monitor under NDEP’s jurisdiction, Harvey’s Resort Hotel in
Stateline. Between 1998 and 2009, CO data was also collected at three other monitors,
Long Street in Carson City, Law Enforcement Building in Minden, and Horizon Casino
Resort in Stateline.
As mentioned in Section 2.2 of the Trend Report, compliance with the CO NAAQS is
met when the 35 ppm 1-hour average standard and/or the 9 ppm 8-hour average standard
is not exceeded more than once per year.
Results from the Harvey’s Resort Hotel monitor in Stateline peak in 2002 was observed
during the July 2002 due to the Gondola Fire; a 673 acre timber wildfire at the Heavenly
Ski Resort a short distance from the monitor.
Nevada Air Quality Trend Report, 1998-2009
January 2011
78
Figure C1: Map of Carbon Monoxide Monitoring Stations
Harvey’s
Resort Hotel
Horizon
Casino Resort
Hotel
Law Enforcement
Building
Long Street
Nevada Air Quality Trend Report, 1998-2009
January 2011
79
Table C2: Carbon Monoxide - 1 Hour Averages (ppm)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-510-0004
Long Street
1st High 10.5 8.9 8.0 7.0 8.3 5.5 6.0 4.3 4.8 4.8 2.9
2nd High 8.3 8.6 7.4 6.9 7.2 5.3 5.1 4.3 4.3 4.6 2.7
Minden Law
Enforcement
Building
1st High 4.0 2.3
2nd High 3.1 2.0
32-005-0004
Horizon Casino
Resort
1st High 4.4 3.4
2nd High 4.2 3.2
32-005-0009
Harvey’s Resort
Hotel
1st High 10.3 13.0 7.6 17.2 13.0 12.0 12.7 5.2 7.8 5.8 10.5
2nd High 9.5 12.1 7.5 13.2 11.2 9.4 7.8 5.0 7.5 5.4 7.6
Table C3: Carbon Monoxide - 8 Hour Averages (ppm)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-510-0004
Long Street
1st High 4.6 4.9 3.8 3.9 3.9 3.3 3.3 2.9 2.8 2.8 2.2
2nd High 4.5 4.4 3.6 3.6 3.9 3.1 2.9 2.7 2.7 2.6 1.7
Minden Law
Enforcement
Building
1st High 1.8 1.1
2nd High 1.7 1.1
32-005-0004
Horizon Casino
Resort
1st High 1.9 2.3
2nd High 1.8 2.1
32-005-0009
Harvey’s Resort
Hotel
1st High 4.6 4.4 3.7 8.8 7.3 4.4 3.8 3.1 4.5 2.6 3.4
2nd High 4.3 4.2 3.6 6.1 6.5 4.4 3.6 3.0 3.7 2.4 2.6
Nevada Air Quality Trend Report, 1998-2009
January 2011
80
CARBON MONOXIDE GRAPHS AND TABLES
LONG STREET CARBON MONOXIDE DATA
32-510-0004 (SLAMS/SPMS) Carson City - Long Street
One-Hour Carbon Monoxide Concentrations
YEAR 1st High 2nd High 1-Hour Exceedances
1998 10.5 8.3 0
1999 8.9 8.6 0
2000 8.0 7.4 0
2001 7.0 6.9 0
2002 8.3 7.4 0
2003 5.5 5.3 0
2004 6.0 5.1 0
2005 4.3 4.3 0
2006 4.8 4.3 0
2007 4.8 4.6 0
2008 2.9 2.7 0
2009 no data no data ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
81
32-510-0004 (SLAMS/SPMS) Carson City - Long Street
Eight-Hour Carbon Monoxide Concentrations
YEAR 1st High 2nd High Federal Exceedances
1998 4.6 4.5 0
1999 4.9 4.4 0
2000 3.8 3.6 0
2001 3.9 3.6 0
2002 3.9 3.9 0
2003 3.3 3.1 0
2004 3.3 2.9 0
2005 2.9 2.7 0
2006 2.8 2.7 0
2007 2.8 2.6 0
2008 2.2 1.7 0
2009 no data no data ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
82
LAW ENFORCEMENT BUILDING CARBON MONOXIDE DATA
(SPMS) Minden - Law Enforcement Building
1-Hr CO Concentrations
YEAR 1st High 2nd High 1-Hour Exceedances
1998 4.0 3.1 0
1999 2.3 2.0 0
2000 no data --- ---
2001 no data --- ---
2002 no data --- ---
2003 no data --- ---
2004 no data --- ---
2005 no data --- ---
2006 no data --- ---
2007 no data --- ---
2008 no data --- ---
2009 no data --- ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
83
(SPMS) Minden - Law Enforcement Building
8-Hr CO Concentrations
YEAR 1st High 2nd High Federal Exceedances
1998 1.8 1.7 0
1999* 1.1 1.1 0
2000 no data --- ---
2001 no data --- ---
2002 no data --- ---
2003 no data --- ---
2004 no data --- ---
2005 no data --- ---
2006 no data --- ---
2007 no data --- ---
2008 no data --- ---
2009 no data --- ---
*Discontinued at the end of 1999.
Nevada Air Quality Trend Report, 1998-2009
January 2011
84
HORIZON CASINO RESORT CARBON MONOXIDE DATA
32-005-0004 (SLAMS) Stateline - Horizon Casino Resort
One-Hour Carbon Monoxide Concentrations
YEAR 1st High 2nd High 1-Hour Exceedances
1998 4.4 4.2 0
1999* 3.4 3.2 0
2000 no data no data ---
2001 no data no data ---
2002 no data no data ---
2003 no data no data ---
2004 no data no data ---
2005 no data no data ---
2006 no data no data ---
2007 no data no data ---
2008 no data no data ---
2009 no data no data ---
*Data for January-June: discontinued monitoring
Nevada Air Quality Trend Report, 1998-2009
January 2011
85
32-005-0004 (SLAMS) Stateline - Horizon Casino Resort
Eight-Hour Carbon Monoxide Concentrations
YEAR 1st High 2nd High Federal Exceedances
1998 1.9 1.8 0
1999* 2.3 2.1 0
2000 no data no data ---
2001 no data no data ---
2002 no data no data ---
2003 no data no data ---
2004 no data no data ---
2005 no data no data ---
2006 no data no data ---
2007 no data no data ---
2008 no data no data ---
2009 no data no data ---
*Data for January-June: discontinued monitoring
Nevada Air Quality Trend Report, 1998-2009
January 2011
86
HARVEY’S RESORT HOTEL CARBON MONOXIDE DATA
32-005-0009 (SLAMS) Stateline - Harvey’s Resort Hotel
One-Hour Carbon Monoxide Concentrations
YEAR 1st High 2nd High 1-Hour Exceedances
1998 no data no data ---
1999 10.3 9.5 0
2000 13.0 12.1 0
2001 7.6 7.5 0
2002 17.2 13.2 0
2003 13.0 11.2 0
2004 12.0 9.4 0
2005 12.7 7.8 0
2006 5.2 5.0 0
2007 7.8 7.5 0
2008 5.8 5.3 0
2009 10.5 7.6 0
Nevada Air Quality Trend Report, 1998-2009
January 2011
87
32-005-0009 (SLAMS) Stateline - Harvey’s Resort Hotel
Eight-Hour Carbon Monoxide Concentrations
YEAR 1st High 2nd High Federal Exceedances
1998 no data no data ---
1999 4.6 4.3 0
2000 4.4 4.2 0
2001 3.7 3.6 0
2002 8.8 6.1 0
2003 7.3 6.5 0
2004 4.4 4.4 0
2005 3.8 3.6 0
2006 3.1 3.0 0
2007 4.5 3.7 0
2008 2.6 2.4 0
2009 3.4 2.6 0
Nevada Air Quality Trend Report, 1998-2009
January 2011
88
Ground-Level Ozone Monitoring Data
There are three active O3 monitors under NDEP’s jurisdiction, Fifth Street in Carson
City, West End Elementary School in Fallon, and Intermediate School in Fernley. In
addition, O3 data is collected by the National Park Service at the IMPROVE Site in Great
Basin National Park. Between 1998 and 2009, O3 data was also collected at four other
monitors, Long Street in Carson City, Fire Station in Fernley, Horizon Casino Resort in
Stateline, and Cave Rock State Park in Zephyr Cove.
As mentioned in Section 2.5 of the Trend Report, the revoked 1-hour O3 standard was
met when the expected number of days per calendar year with maximum hourly average
concentrations above 0.12 ppm was less than or equal to 1. The 1997 8-hour O3 standard
was met when design value is less than or equal to 0.08 ppm. The design value for O3 is
the 3-year average of the 4th highest daily maximum 8-hour average concentration. The
2008 8-hour O3 standard is met when design value is less than or equal to 0.075 ppm.
Nevada Air Quality Trend Report, 1998-2009
January 2011
89
Figure C2: Map of Ground-Level Ozone Monitoring Stations
Horizon
Casino Resort
Long Street
Fifth Street
Cave Rock
State Park
Great Basin
National Park
West End
Elementary School
Intermediate
School
Fire Station
Nevada Air Quality Trend Report, 1998-2009
January 2011
90
Table C4: Ozone - 1 Hour Averages (ppm)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-510-0002
Fifth Street
1st High 0.106 0.081
2nd High 0.087 0.078
32-510-0004
Long Street
1st High 0.084 0.080 0.086 0.091 0.079 0.079 0.082 0.072 0.086 0.080
2nd High 0.080 0.075 0.076 0.086 0.078 0.078 0.079 0.069 0.084 0.075
32-001-0002
West End
Elementary
1st High 0.074 0.069 0.079 0.081 0.082 0.074
2nd High 0.070 0.064 0.071 0.076 0.079 0.067
SPMS
Fernley Fire
Station
1st High 0.08 0.09 0.08 0.08 0.08 0.09
2nd High 0.08 0.08 0.07 0.08 0.08 0.08
32-019-0006
Intermediate
School
1st High
0.074 0.083 0.073
2nd High 0.072 0.081 0.073
32-033-0008
IMPROVE Site
1st High 0.084 0.086 0.083 0.081 0.091 0.085 0.085 0.091 0.085 0.085 0.080 0.077
2nd High 0.080 0.081 0.082 0.078 0.085 0.079 0.084 0.084 0.080 0.084 0.080 0.074
32-005-0004
Horizon Casino
Resort
1st High 0.078 0.074
2nd High 0.075 0.071
32-005-0008
Cave Rock State
Park
1st High 0.090 0.090 0.096 0.087 0.080 0.061
2nd High 0.087 0.085 0.087 0.086 0.077 0.059
Table C5: Ozone - 8 Hour Averages (ppm)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-510-0002
Fifth Street
4th High 0.074 0.069
Exceed Year No No
32-510-0004
Long Street
4th High 0.067 0.066 0.067 0.071 0.071 0.065 0.066 0.061 0.070 0.067
Exceed Year No No No No No No No No No No
32-001-0002
West End
Elementary
4th High 0.064 0.059 0.064 0.071 0.067 0.059
Exceed Year No No No No No No
SPMS
Fernley Fire
Station
4th High 0.070 0.070 0.070 0.065 0.066 0.067
Exceed Year No No No No No No
32-019-0006
Intermediate
School
4th High
0.062 0.069 0.058
Exceed Year No No No
32-033-0008
IMPROVE Site
4th High 0.070 0.072 0.077 0.067 0.074 0.071 0.072 0.073 0.072 0.075 0.071 0.069
Exceed Year No No No No No No No No No No No No
32-005-0004
Horizon Casino
Resort
4th High 0.069 0.061
Exceed Year No No
32-005-0008
Cave Rock State
Park
4th High 0.072 0.071 0.073 0.074 0.066 0.051
Exceed Year No No No No No No
Nevada Air Quality Trend Report, 1998-2009
January 2011
91
GROUND-LEVEL OZONE GRAPHS AND TABLES
FIFTH STREET GROUND-LEVEL OZONE DATA
32-510-0002 (SLAMS) Carson City - Fifth Street
Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 no data ---
1999 no data ---
2000 no data ---
2001 no data ---
2002 no data ---
2003 no data ---
2004 no data ---
2005 no data ---
2006 no data ---
2007 no data ---
2008 0.074 No
2009 0.069 No
Nevada Air Quality Trend Report, 1998-2009
January 2011
92
LONG STREET GROUND-LEVEL OZONE DATA
32-510-0004 (SLAMS/SPMS) Carson City - Long Street
One-Hour Ozone Concentrations
YEAR 1st High 2nd High Exceedance Exceedance
Hours Days
1998 0.084 0.080 0 0
1999 0.080 0.075 0 0
2000 0.086 0.076 0 0
2001 0.091 0.086 0 0
2002 0.079 0.078 0 0
2003 0.079 0.078 0 0
2004 0.082 0.079 0 0
2005 0.072 0.069 0 0
2006 0.086 0.084 0 0
2007 0.080 0.075 0 0
2008 no data no data --- ---
2009 no data no data --- ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
93
32-510-0004 (SLAMS/SPMS) Carson City - Long Street
Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 0.067 No
1999 0.066 No
2000 0.067 No
2001 0.071 No
2002 0.071 No
2003 0.065 No
2004 0.066 No
2005 0.061 No
2006 0.070 No
2007 0.067 No
2008 no data ---
2009 no data ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
94
WEST END ELEMENTARY SCHOOL GROUND-LEVEL OZONE DATA
32-001-0002 (SPMS) Fallon - West End Elementary School
One-Hour Ozone Concentrations
YEAR 1st High 2nd High Exceedance Exceedance
Hours Days
1998 no data no data --- ---
1999 no data no data --- ---
2000 no data no data --- ---
2001 no data no data --- ---
2002 no data no data --- ---
2003 no data no data --- ---
2004 0.074 0.070 0 0
2005 0.069 0.064 0 0
2006 0.079 0.071 0 0
2007 0.081 0.074 0 0
2008 0.082 0.079 0 0
2009 0.082 0.079 0 0
Nevada Air Quality Trend Report, 1998-2009
January 2011
95
32-001-0002 (SLAMS) Fallon - West End Elementary School
Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 no data ---
1999 no data ---
2000 no data ---
2001 no data ---
2002 no data ---
2003 no data ---
2004 0.064 No
2005 0.059 No
2006 0.064 No
2007 0.071 No
2008 0.067 No
2009 0.059 No
Nevada Air Quality Trend Report, 1998-2009
January 2011
96
FERNLEY FIRE STATION GROUND-LEVEL OZONE DATA
(SPMS) Fernley - Fire Station
One-Hour Ozone Concentrations
YEAR 1st High 2nd High Exceedance Exceedance
Hours Days
1998 0.08 0.08 0 0
1999 0.09 0.08 0 0
2000 0.08 0.07 0 0
2001 0.08 0.08 0 0
2002 0.08 0.08 0 0
2003 0.09 0.08 0 0
2004 no data no data --- ---
2005 no data no data --- ---
2006 no data no data --- ---
2007 no data no data --- ---
2008 no data no data --- ---
2009 no data no data --- ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
97
(SPMS) Fernley - Fire Station
Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 0.07 No
1999 0.07 No
2000 0.07 No
2001 0.065 No
2002 0.066 No
2003 0.067 No
2004 no data ---
2005 no data ---
2006 no data ---
2007 no data ---
2008 no data ---
2009 no data ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
98
FERNLEY INTERMEDIATE SCHOOL GROUND-LEVEL OZONE DATA
32-019-0006 (SLAMS) Fernley - Intermediate School
Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 no data ---
1999 no data ---
2000 no data ---
2001 no data ---
2002 no data ---
2003 no data ---
2004 no data ---
2005 no data ---
2006 no data ---
2007 0.062 No
2008 0.069 No
2009 0.058 No
Nevada Air Quality Trend Report, 1998-2009
January 2011
99
GREAT BASIN NATIONAL PARK IMPROVE SITE GROUND-LEVEL OZONE
DATA
32-033-0008 (SLAMS) Great Basin National Park – IMPROVE Site
One-Hour Ozone Concentrations
YEAR 1st High 2nd High Exceedance Exceedance
Hours Days
1998 0.084 0.080 0 0
1999 0.086 0.081 0 0
2000 0.083 0.082 0 0
2001 0.081 0.078 0 0
2002 0.091 0.085 0 0
2003 0.085 0.079 0 0
2004 0.085 0.084 0 0
2005 0.091 0.084 0 0
2006 0.085 0.080 0 0
2007 0.085 0.084 0 0
2008 0.080 0.080 0 0
2009 0.077 0.074 0 0
Nevada Air Quality Trend Report, 1998-2009
January 2011
100
32-033-0008 (SLAMS) Great Basin National Park –
IMPROVE Site Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 0.070 No
1999 0.072 No
2000 0.077 No
2001 0.067 No
2002 0.074 No
2003 0.071 No
2004 0.072 No
2005 0.073 No
2006 0.072 No
2007 0.075 No
2008 0.071 No
2009 0.069 No
Nevada Air Quality Trend Report, 1998-2009
January 2011
101
HORIZON CASINO RESORT GROUND-LEVEL OZONE DATA
32-005-0004 (SLAMS) Stateline - Horizon Casino Resort One-Hour Ozone Concentrations
YEAR 1st High 2nd High Exceedance Exceedance
Hours Days
1998 0.078 0.075 0 0
1999 no data no data --- ---
2000 no data no data --- ---
2001 no data no data --- ---
2002 no data no data --- ---
2003 no data no data --- ---
2004 no data no data --- ---
2005 no data no data --- ---
2006 no data no data --- ---
2007 no data no data --- ---
2008 no data no data --- ---
2009 no data no data --- ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
102
32-005-0004 (SLAMS) Stateline - Horizon Casino Resort Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 0.069 No
1999 no data ---
2000 no data ---
2001 no data ---
2002 no data ---
2003 no data ---
2004 no data ---
2005 no data ---
2006 no data ---
2007 no data ---
2008 no data ---
2009 no data ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
103
CAVE ROCK STATE PARK GROUND-LEVEL OZONE DATA
32-005-0008 (SLAMS) Zephyr Cove - Cave Rock State Park
One-Hour Ozone Concentrations
YEAR 1st High 2nd High Exceedance Exceedance
Hours Days
1998 no data no data --- ---
1999 0.090 0.087 0 0
2000 0.090 0.085 0 0
2001 0.096 0.087 0 0
2002 0.087 0.086 0 0
2003 0.080 0.077 0 0
2004 0.061 0.059 0 0
2005 no data no data --- ---
2006 no data no data --- ---
2007 no data no data --- ---
2008 no data no data --- ---
2009 no data no data --- ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
104
32-005-0008 (SLAMS) Zephyr Cove - Cave Rock State Park Eight-Hour Ozone Concentrations
YEAR 4th High Exceedance Year
1998 no data ---
1999 0.072 No
2000 0.071 No
2001 0.073 No
2002 0.074 No
2003 0.066 No
2004 0.051 No
2005 no data ---
2006 no data ---
2007 no data ---
2008 no data ---
2009 no data ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
105
PM2.5 Monitoring Data
There are three active PM2.5 monitors under NDEP’s jurisdiction, Fifth Street in Carson
City, Intermediate School in Fernley, and Gardnerville Ranchos in Gardnerville. Between
1998 and 2009, PM2.5 data was also collected at two other monitors, Long Street in
Carson City and Cave Rock State Park in Zephyr Cove.
As mentioned in Section 2.6 of the Trend Report, the 1997 24-hour PM2.5 NAAQS was
met when the design value was less than or equal to 65 μg/m3 and the 2006 24-hour
PM2.5 NAAQS is met when the design value is less than or equal to 35 μg/m3. The design
value for PM2.5 is the 3-year average of the 98th percentile 24-hour concentration. The
PM2.5 annual NAAQS is met when the 3-year average of the weighted annual mean PM2.5
concentrations is less than or equal to 15.0 µg/m3.
Nevada Air Quality Trend Report, 1998-2009
January 2011
106
Figure C3: Map of PM2.5 Monitoring Stations
Gardnerville
Ranchos
Long Street
Fifth Street
Cave Rock
State Park
Intermediate
School
Nevada Air Quality Trend Report, 1998-2009
January 2011
107
Table C6: PM2.5 Concentrations (µg/m3)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-510-0002
Fifth Street
# of Samples 90 98
th Percentile 31 Mean N/A*
24-Hour
Exceedances 0
32-510-0004
Long Street
# of Samples 240 324 365 349 359 364 365 359 295 238 284 146 98
th Percentile 17 20 26 26 20 16 28 65 16 23 25 27 Mean 8.1 N/A 4.9 4.5 4.9 3.7 3.7 7.1 3.6 5.5 N/A N/A
24-Hour
Exceedances 0 0 0 1 0 0 1 7 0 0 3 0
32-019-0006
Fernley
Intermediate School
# of Samples
186 359 345 357 281 293 267 181 255 299 315 98
th Percentile 20 18 27 20 9 14 19 8 11 12 20 Mean N/A 5.5 5.3 4.3 3.8 3.6 4.1 N/A 3.5 3.7 5.4
24-Hour
Exceedances 0 0 0 0 0 0 0 0 0 1 1
32-005-0007
Gardnerville Ranchos
# of Samples 149 344 337 340 363 309 365 311 301 356 351 273 98
th Percentile 18 24 28 31 29 25 38 73 28 26 27 32 Mean N/A N/A 6.3 5.8 6.3 6.1 6.9 8.0 11.8 10.8 11.5 11.2
24-Hour
Exceedances 0 0 0 0 0 0 2 8 0 0 2 6
32-005-0008
Cave Rock State Park
# of Samples 120 122
98th Percentile 9 19
Mean 3.8 4.6
24-Hour
Exceedances 0 0
*N/A indicates that the annual mean is not available due to insufficient data (fewer than 11 samples in one
or more quarters).
Nevada Air Quality Trend Report, 1998-2009
January 2011
108
PM2.5 GRAPHS AND TABLES
FIFTH STREET PM2.5 DATA
32-510-0002 Carson City - Fifth Street
PM2.5 Concentrations
YEARS # of 24-Hr 98th Mean 24-Hr
Samples Percentile (Arith.) Exceedances
1998 no data --- --- ---
1999 no data --- --- ---
2000 no data --- --- ---
2001 no data --- --- ---
2002 no data --- --- ---
2003 no data --- --- ---
2004 no data --- --- ---
2005 no data --- --- ---
2006 no data --- --- ---
2007 no data --- --- ---
2008 no data --- --- ---
2009 90 31 N/A* 0
*N/A indicates that the annual mean is not available due to
insufficient data (fewer than 11 samples in one or more
quarters).
Nevada Air Quality Trend Report, 1998-2009
January 2011
109
LONG STREET PM2.5 DATA
32-510-0004 Carson City - Long Street
PM2.5 Concentrations
YEAR # of 24-Hr 98
th Mean 24-Hr
Samples Percentile (Arith.) Exceedances
1998 228 17 8.1 0
1999 269 20 N/A* 0
2000 366 26 4.9 0
2001 349 26 4.5 0
2002 357 20 4.9 0
2003 363 16 3.7 0
2004 365 28 3.7 0
2005 359 65 7.1 13
2006 356 16 3.6 0
2007 327 23 5.5 0
2008 284 25 N/A 0
2009 177 27 N/A 0
*N/A indicates that the annual mean is not available due to
insufficient data (fewer than 11 samples in one or more
quarters).
Nevada Air Quality Trend Report, 1998-2009
January 2011
110
FERNLEY INTERMEDIATE SCHOOL PM2.5 DATA
*N/A indicates that the annual mean is not available due to
insufficient data (fewer than 11 samples in one or more
quarters).
32-019-0006 (SPMS) Fernley - Intermediate School
PM2.5 Concentrations
YEARS # of 24-Hr 98
th Mean 24-Hr
Samples Percentile (Arith.) Exceedances
1998 no data --- --- ---
1999 186 20 N/A* 0
2000 359 18 5.5 0
2001 345 27 5.3 0
2002 357 20 4.3 0
2003 281 9 3.8 0
2004 293 14 3.6 0
2005 267 19 4.1 0
2006 181 8 N/A 0
2007 255 11 3.5 0
2008 299 12 3.7 1
2009 315 20 5.4 1
Nevada Air Quality Trend Report, 1998-2009
January 2011
111
GARDNERVILLE RANCHOS PM2.5 DATA
*N/A indicates that the annual mean is not available due to
insufficient data (fewer than 11 samples in one or more
quarters).
32-005-0007 Gardnerville - Gardnerville Ranchos
PM2.5 Concentrations
YEAR # of 24-Hr 98
th Mean 24-Hr
Samples Percentile (Arith.) Exceedances
1998 149 18 N/A* 0
1999 264 24 N/A 0
2000 339 28 6.3 0
2001 340 31 5.8 0
2002 357 29 6.3 0
2003 336 25 6.1 0
2004 366 38 6.9 0
2005 311 73 8.0 8
2006 331 28 11.8 1
2007 356 26 10.8 0
2008 351 27 11.5 2
2009 303 32 11.2 6
Nevada Air Quality Trend Report, 1998-2009
January 2011
112
CAVE ROCK STATE PARK PM2.5 DATA
32-005-0008 Zephyr Cove - Cave Rock State Park
PM2.5 Concentrations
YEAR # of 24-Hr 98
th Mean 24-Hr
Samples Percentile (Arith.) Exceedances
1998 no data --- --- ---
1999 no data --- --- ---
2000 120 9 3.8 0
2001 122 19 4.6 0
2002 no data --- --- ---
2003 no data --- --- ---
2004 no data --- --- ---
2005 no data --- --- ---
2006 no data --- --- ---
2007 no data --- --- ---
2008 no data --- --- ---
2009 no data --- --- ---
Nevada Air Quality Trend Report, 1998-2009
January 2011
113
PM10 Monitoring Data
There are five active PM10 monitors under NDEP’s jurisdiction, Grammar School #2 in
Elko as well as Linda Street, Church, Manse Elementary School, and Glenoaks Street in
Pahrump. Between 1998 and 2009, PM10 data was also collected at 14 other monitoring
sites, Battle Mountain Police & Fire Station in Battle Mountain, Battle Mountain High
School in Battle Mountain, Bordewich School in Carson City, Long Street in Carson City,
State Offices Building in Elko, West End Elementary School in Fallon, Intermediate
School in Fernley, Gardnerville Ranchos in Gardnerville, McGill Elementary School in
McGill, the Dispatch Center in Minden, Community Pool in Pahrump, Willow Creek in
Pahrump, Horizon Casino Resort in Stateline, and Cave Rock State Park in Zephyr Cove.
As mentioned in Section 2.6 of the Trend Report, compliance with the 1997 annual PM10
NAAQS was met when the 3-year average of the annual mean PM10 concentrations is
less than or equal to 50 µg/m3. The annual PM10 NAAQS (50 µg/m
3) was revoked in the
2006 review. Compliance with the 24-hour PM10 NAAQS is met when the expected
number of days per calendar year above 150 μg/m3 is less than or equal to one, over a 3-
year period.
Nevada Air Quality Trend Report, 1998-2009
January 2011
114
Figure C4: Map of Active PM10 Monitoring Stations
Glenoaks
Street
Elko Grammar
School #2
Linda Street
Church
Manse Elementary
School
Nevada Air Quality Trend Report, 1998-2009
January 2011
115
Figure C5: Map of Discontinued PM10 Monitoring Stations
Horizon
Casino Resort
Long Street
Bordewich
School
Cave Rock
State Park
West End
Elementary School
Dispatch Center
Gardnerville
Ranchos
State Offices
Building
Police & Fire
Station High School
Willow Creek
Community
Pool
Intermediate
School
McGill
Elementary School
Nevada Air Quality Trend Report, 1998-2009
January 2011
116
Table C7: PM10 Concentrations (µg/m3)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-015-0002
Battle Mountain
Police & Fire Station
# of Samples 41
1st High 60
2nd High 50
Mean 26*
24-Hour
Exceedances 0
32-015-0004
Battle Mountain
High School
# of Samples 130 147 344 355 356
1st High 70 120 260 110 140
2nd High 60 100 190 90 140
Mean 17* 27* 20 22 22
24-Hour
Exceedances 0 0 2 0 0
32-510-0003
Bordewich School
# of Samples 15
1st High 30
2nd High 30
Mean 15*
24-Hour
Exceedances 0
32-510-0004
Long Street
# of Samples 25
1st High 50
2nd High 30
Mean 15*
24-Hour
Exceedances 0
32-007-0004
Elko
State Offices Building
# of Samples 54 349 214 261 304 346 355 210 319 280 72
1st High 100 80 90 100 150 110 80 90 130 90 40
2nd High 70 80 80 70 90 80 70 70 130 90 40
Mean 22* 25 25* 25* 22* 19 21 21* 26* 26* 15*
24-Hour
Exceedances 0 0 0 0 0 0 0 0 0 0 0
32-007-0005
Elko Grammar
School #2
# of Samples 19 294
1st High 20 140
2nd High 20 130
Mean 9* 25*
24-Hour
Exceedances 0 0
32-001-0002
West End Elementary
School
# of Samples 25
1st High 80
2nd High 50
Mean 19*
24-Hour
Exceedances 0
32-019-0006
Fernley
Intermediate Schoool
# of Samples 47
1st High 40
2nd High 40
Mean 16
24-Hour
Exceedances 0
32-005-0007
Gardnerville Ranchos
# of Samples 30
1st High 60
2nd High 40
Mean 13*
24-Hour
Exceedances 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
117
Table C7 continued: PM10 Concentrations (µg/m3)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-033-0002
McGill Elementary
Monitor #1
# of Samples 15
1st High 20
2nd High 20
Mean 11*
24-Hour
Exceedances 0
32-033-0002
McGill Elementary
Monitor #2
# of Samples 15
1st High 20
2nd High 20
Mean 12*
24-Hour
Exceedances 0
32-005-0005
Minden
Dispatch Center
# of Samples 15
1st High 30
2nd High 20
Mean 12*
24-Hour
Exceedances 0
32-023-0010
Community Pool
# of Samples 236 327 116 310
1st High 240 530 360 250
2nd High 220 320 210 180
Mean 41 54 32* 42
24-Hour
Exceedances 4 14 3 2
32-023-0011
Linda Street
# of Samples 356 231 320 332 324 322
1st High 130 50 120 140 60 70
2nd High 110 50 80 80 60 70
Mean 11 14* 16* 18 18* 26*
24-Hour
Exceedances 0 0 0 0 0 0
32-023-0012
Willow Creek
# of Samples 334 362 282 329 251
1st High 230 80 150 140 130
2nd High 120 80 140 120 90
Mean 30 25 29* 25 17*
24-Hour
Exceedances 1 0 0 0 0
32-023-0013
Church
# of Samples 261 308 365 355 351 341
1st High 130 70 120 110 90 100
2nd High 80 60 70 110 80 80
Mean 22* 20* 21 21 17 13
24-Hour
Exceedances 0 0 0 0 0 0
32-023-0014
Manse Elementary
School
# of Samples 44 344 312 299 284
1st High 110 140 140 140 150
2nd High 80 130 120 120 150
Mean 51* 35 38* 27* 30*
24-Hour
Exceedances 0 0 0 0 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
118
Table C7 continued: PM10 Concentrations (µg/m3)
Site Number/
Site Name Value 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
32-023-0015
Glenoaks Street
# of Samples 55
1st High 100
2nd High 70
Mean 35*
24-Hour
Exceedances 0
32-005-0004
Horizon Casino Resort
Monitor #1
# of Samples 15
1st High 70
2nd High 40
Mean 19*
24-Hour
Exceedances 0
32-005-0004
Horizon Casino Resort
Monitor #2
# of Samples 13
1st High 70
2nd High 40
Mean 22*
24-Hour
Exceedances 0
32-005-0008
Cave Rock State Park
# of Samples
61 60
1st High 60 20
2nd High 50 20
Mean 11 9
24-Hour
Exceedances 0 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
119
PM10 GRAPHS AND TABLES BATTLE MOUNTAIN POLICE & FIRE STATION PM10 DATA
32-015-0002 (SLAMS) Battle Mountain - Police & Fire Station
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 41 60 50 26* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
120
BATTLE MOUNTAIN HIGH SCHOOL PM10 DATA
32-015-0004 (SLAMS) Battle Mountain - High School
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 130 70 60 17* 0
1999 147 120 100 27* 0
2000 344 260 190 20 2
2001 355 110 90 22 0
2002 356 140 140 22 0
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
121
BORDEWICH SCHOOL PM10 DATA
32-510-0003 (SLAMS) Carson City - Bordewich School
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 15 30 30 15* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued site: data for January-March
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
122
LONG STREET PM10 DATA
32-510-0004 (SLAMS/SPMS) Carson City - Long Street
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 25 50 30 15* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued monitoring: data for January-June
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
123
STATE OFFICES BUILDING PM10 DATA
32-007-0004 (SLAMS) Elko - State Offices Building
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 54 100 70 22* 0
1999 349 80 80 25 0
2000 214 90 80 25* 0
2001 261 100 70 25* 0
2002 304 150 90 22* 0
2003 346 110 80 19 0
2004 355 80 70 21 0
2005 210 90 70 21* 0
2006 319 130 130 26* 0
2007 280 90 90 26* 0
2008^ 72 40 40 15* 0
2009 no data --- --- --- ---
^PM10 monitoring was discontinued at 850 Elm Street at the end of August 2008.
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
124
ELKO GRAMMAR SCHOOL #2 PM10 DATA
32-007-0005 (SLAMS) Elko - Elko Grammar School #2
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008^ 19 20 20 9* 0
2009 294 140 130 25* 0
*BAM installed at site in September. Data is from December only.
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
125
WEST END ELEMENTARY SCHOOL PM10 DATA
32-001-0002 (SLAMS) Fallon - West End Elementary School
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 25 80 50 19* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued site: data for January-June
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
126
FERNLEY INTERMEDIATE SCHOOL PM10 DATA
32-019-0006 (SLAMS) Fernley - Intermediate School
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 47 40 40 16 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued site
Nevada Air Quality Trend Report, 1998-2009
January 2011
127
GARDNERVILLE RANCHOS PM10 DATA
32-005-0007 (SLAMS) Gardnerville – Gardnerville Ranchos
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 30 60 40 13* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued monitoring: data for January-June
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
128
MCGILL ELEMENTARY SCHOOL MONITOR #1 PM10 DATA
32-033-0002 (SLAMS) McGill - McGill Elementary School Monitor #1
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 15 20 20 11* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued site: data for January-March
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
129
MCGILL ELEMENTARY SCHOOL MONITOR #2 PM10 DATA
32-033-0002 (SLAMS) McGill - McGill Elementary School Monitor #2
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 15 20 20 12* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued site: data for January-March
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
130
MINDEN DISPATCH CENTER PM10 DATA
32-005-0005 (SLAMS) Minden - Dispatch Center
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 15 30 20 12* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued site: data for January-March
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
131
COMMUNITY POOL PM10 DATA
32-023-0010 (SLAMS) Pahrump - Community Pool
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 236 240 220 41 4
2002 327 530 320 54 14
2003 116 360 210 32* 3
2004 310 250 180 42 2
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
132
LINDA STREET PM10 DATA
32-023-0011 (SPMS) Pahrump - Linda Street
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 356 130 110 11 0
2005 231 50 50 14* 0
2006 320 120 80 16* 0
2007 332 140 80 18 0
2008 324 60 60 18* 0
2009 322 70 70 26* 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
133
WILLOW CREEK PM10 DATA
32-023-0012 (SPMS) Pahrump - Willow Creek
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 334 230 120 30 1
2005 362 80 80 25 0
2006 282 150 140 29* 0
2007 329 140 120 25 0
2008 251 130 90 17* 0
2009 no data --- --- --- ---
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
134
CHURCH PM10 DATA
32-023-0013 Pahrump - Church
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 261 130 80 22* 0
2005 308 70 60 20* 0
2006 365 120 70 21 0
2007 355 110 110 21 0
2008 351 90 80 17 0
2009 341 100 80 13 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
135
MANSE ELEMENTARY SCHOOL PM10 DATA
32-023-0014 Pahrump - Manse Elementary School
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 44 110 80 51* 0
2006 344 140 130 35 0
2007 312 140 120 38* 0
2008 299 140 120 27* 0
2009 284 150 150 30* 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
136
GLENOAKS STREET PM10 DATA
32-023-0015 Pahrump - Glenoaks Street
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 55 100 70 35* 0
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
137
HORIZON CASINO RESORT MONITOR #1 PM10 DATA
32-005-0004 (SLAMS) Stateline - Horizon Casino Resort Monitor #1
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 15 70 40 19* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued monitoring: data for January-March
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
138
HORIZON CASINO RESORT MONITOR #2 PM10 DATA
32-005-0004 (SLAMS) Stateline - Horizon Casino Resort Monitor #2
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998^ 13 70 40 22* 0
1999 no data --- --- --- ---
2000 no data --- --- --- ---
2001 no data --- --- --- ---
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
^Discontinued monitoring: data for January-March
*Indicates that the mean does not satisfy summary criteria.
Nevada Air Quality Trend Report, 1998-2009
January 2011
139
CAVE ROCK STATE PARK PM10 DATA
32-005-0008 (SLAMS) Zephyr Cove - Cave Rock State Park
PM10 Concentrations
YEARS # of 1st 2nd Mean 24-hr.
Samples High High (Arith.) Exceedances
1998 no data --- --- --- ---
1999 no data --- --- --- ---
2000 60 20 20 9 0
2001* 61 60 50 11 0
2002 no data --- --- --- ---
2003 no data --- --- --- ---
2004 no data --- --- --- ---
2005 no data --- --- --- ---
2006 no data --- --- --- ---
2007 no data --- --- --- ---
2008 no data --- --- --- ---
2009 no data --- --- --- ---
*PM10 monitoring was discontinued at Cave Rock State Park at the end of January 2002.