2012 Ambient Air Monitoring 

Network Report 

 Washington State Department of Ecology

300 Desmond Drive/PO Box 47600

Olympia, Washington 98504-7600

May 2012

Publication no. 12-02-008
Publication and Contact Information

This report is available on the Department of Ecology’s website at 

www.ecy.wa.gov/biblio/1102017.html 

For more information contact:

Air Quality Program

P.O. Box 47600 

Olympia, WA 98504-7600 

Phone: 360-407-6800

Washington State Department of Ecology - www.ecy.wa.gov

o Headquarters, Olympia 360-407-6000

o Northwest Regional Office, Bellevue 425-649-7000

o Southwest Regional Office, Olympia 360-407-6300

o Central Regional Office, Yakima 509-575-2490

o Eastern Regional Office, Spokane 509-329-3400

If you need this document in a format for the visually impaired, call the Air Quality Program at 360-407-6800. 

Persons with hearing loss can call 711 for Washington Relay Service. Persons with a speech disability can call 877-

833-6341.
2012 Ambient Air Monitoring Network 

Report

by

Mike Ragan

Air Quality Program

Washington State Department of Ecology

Olympia, Washington
This page is purposely left blank
i

Table of Contents

Executive Summary........................................................................................................... iii

Purpose of the report.................................................................................................... iii

Background information .............................................................................................. iii

Monitoring network requirements ............................................................................... iii

Using monitoring data.................................................................................................. iv

Introduction..........................................................................................................................1

Regulatory Requirements and Other Data Needs................................................................1

Appendix D Requirements.............................................................................................1

Monitoring Objectives and Spatial Scales.............................................................1

Number of State and Local Air Monitoring Stations ............................................2

Appendix E Requirements.............................................................................................3

Other Ambient Air Monitoring Data Needs..........................................................3

Network Review Procedure ...........................................................................................4

Network Review Team and Preparation................................................................4

Network Modifications..........................................................................................4

Determining Compliance with Appendix D and Special Monitoring Requirements

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

Determining Compliance with Appendix E Requirements...................................5

Network Evaluation and Recommendations/Modifications..........................................6

Carbon Monoxide (CO, 42101).............................................................................6

Ozone (O3, 44201).................................................................................................7

Nitrogen Dioxide (NO2, 42602) ..........................................................................10

Sulfur Dioxide (SO2, 42401)...............................................................................12

Particulate Matter 10 (PM10, 81102) ...................................................................13

Particulate Matter 2.5 (PM2.5, 88101, 88502)......................................................14

Other – Contracted Sites USFS ...........................................................................25

Other – Contracted Sites Tribal/EPA ..................................................................26

Other – Contracted Local Air Agencies..............................................................28

Meteorological Monitoring .................................................................................29

Lead (Pb 11351) ..................................................................................................31

Trace Gas Monitoring..........................................................................................32

Toxics..................................................................................................................35

Speciation ............................................................................................................36

References..........................................................................................................................38
ii

List of Tables 

Table 1: Relationship between Monitoring Objectives and Scale of Representativeness.............. 2

Table 2: Summary of Spatial Scales for SLAMS ........................................................................... 2

Table 3: Summary of Probe and Monitoring Path Siting Criteria .................................................. 4

Table 4: Carbon Monoxide, 42101 ................................................................................................. 6

Table 5: Ozone, 44201.................................................................................................................... 7

Table 6: Nitrogen Dioxide 42602 ................................................................................................. 10

Table 7: Sulfur Dioxide 42401 ..................................................................................................... 12

Table 8: Particulate Matter 10 PM10, 81102 ................................................................................. 13

Table 9: Particulate Matter PM2.5, 88101, 88502 ......................................................................... 15

Table 10: Other Contracted Sites USFS ....................................................................................... 25

Table 11: Other - Contracted Sites Tribal/EPA............................................................................ 26

Table 12: Other - Contracted Local Air Agencies........................................................................ 28

Table 13: Meteorological Monitoring........................................................................................... 29

Table 14: Pb Lead 11351 .............................................................................................................. 31

Table 15: Trace Gas Monitoring................................................................................................... 32

Table 16: NCore Parameters Seattle Beacon Hill......................................................................... 33

Table 17: NCore Parameters Cheeka Peak ................................................................................... 34

Table 18: Toxics ........................................................................................................................... 35

Table 19: Speciation ..................................................................................................................... 36
iii

Executive Summary

Purpose of the report

The Department of Ecology (Ecology) reviews its ambient air quality monitoring network each year to

ensure that it collects adequate, representative, and useful air quality data on which to base policy 

decisions. This report summarizes the results of the 2012 review. These results include:

• Identifying modifications to Ecology’s ambient air monitoring network since the 2011 annual 

network report

• Identifying proposed modifications to the network for the upcoming year

• Documenting Ecology’s ambient air quality monitoring needs, goals, and priorities 

Background information

The United States Environmental Protection Agency (EPA) ambient air quality surveillance regulations

(Code of Federal Regulations, Title 40, Part 58 (40 CFR Part 58) require states to establish air quality 

surveillance systems in their State Implementation Plans (SIPs). An air quality surveillance system 

consists of a network of State and Local Air Monitoring Stations (SLAMS). These stations measure 

ambient concentrations of those air pollutants for which 40 CFR Part 50 sets standards. 

Monitoring network requirements

SLAMS must meet requirements of 40 CFR Part 58 contained in:

• Appendix A (Quality Assurance Requirements)

• Appendix C (Ambient Air Quality Monitoring Methodology)

• Appendix D (Network Design Criteria)

• Appendix E (Probe and Path Siting Criteria) 

States determine if they conform to Appendices A and C in part through periodic systems and 

performance audits (per Section 2.4 of Appendix A). States conform to Appendices D and E by 

conducting an annual network review of their air quality surveillance systems (per 40 CFR 58.20(d)). 

The annual network review:

• Determines if an ambient air quality monitoring network is achieving its required air 

monitoring objectives

• Identifies changes to the network needed to enable an organization to meet its objectives
iv

Using monitoring data

Ecology uses its air monitoring data to: 

• Determine compliance with the National Ambient Air Quality Standards (NAAQS)

• Determine maximum pollutant concentrations

• Forecast air quality

• Evaluate the effectiveness of air pollution control programs

• Evaluate the effects of air pollution on public health

• Track the progress of SIPS

• Support dispersion models

• Determine air quality trends

• Develop responsible and cost-effective pollution control strategies

• Analyze pollution episodes 

• Assist with permitting work
1

Introduction

The Code of Federal Regulations, Title 40, Part 58 (40 CFR Part 58) contains the federal Environmental 

Protection Agency’s (EPA’s) ambient air quality surveillance regulations. Section 58.20 requires states to 

establish air quality surveillance systems in their State Implementation Plans (SIPs). The air quality 

surveillance system consists of a network of designated State and Local Air Monitoring stations 

(SLAMS). These stations measure ambient concentrations of those air pollutants for which standards 

exist in 40 CFR Part 50 and Part 58, Appendices A (Quality Assurance Requirements), C (Ambient Air 

Quality Monitoring Methodology), D (Network Design Criteria) and E (Probe and Path Siting Criteria). 

States determine compliance with Appendices A and C in part through periodic systems and performance 

audits (per Section 2.4 of Appendix A). States comply with Appendices D and E by conducting an 

annual network review of their air quality surveillance systems (per 40 CFR 58.20(d)). The annual 

network review determines if the network achieved its required air monitoring objectives and if it should 

be modified (e.g., termination, relocation or establishment of monitoring stations) to meet those 

objectives. The main purpose of this review is to ensure that an ambient air quality monitoring network 

collects adequate, representative, and useful air quality data on which to base policy decisions. The 

ambient air quality data from Ecology’s network is used for a variety of purposes, including:

• Determining compliance with the National Ambient Air Quality Standards (NAAQS)

• Determining the location of maximum pollutant concentrations

• Determining the effectiveness of air pollution control programs

• Evaluating the effects of air pollution on public health

• Tracking the progress of SIPS

• Supporting dispersion models

• Developing responsible, cost-effective, control strategies

• Developing air quality trends

• Analyze pollution episodes

• Assist with permitting work

Regulatory Requirements and Other Data Needs

Appendix D Requirements

Appendix D of 40 CFR 58 describes concepts for designing the SLAMS network. It addresses 

monitoring objectives and the criteria for selecting the location and number of air monitoring stations. 

The concepts and guidance in Appendix D, as well as other non-regulatory EPA data needs, should be 

considered when evaluating the adequacy of the SLAMS network.

Monitoring Objectives and Spatial Scales

Appendix D calls for the design of SLAMS networks to meet a minimum of six basic objectives:

(1) Determine the highest pollutant concentrations expected in the area covered by the network

(2) Determine representative pollutant concentrations in areas of high population density

(3) Determine the impact of significant sources or source categories on pollutant concentrations in

the ambient air
2

(4) Determine general background pollutant concentrations

(5) Determine the regional extent of pollutant transport between populated areas

(6) Determine the impacts (e.g., visibility impairment, vegetation effects) in more rural and remote 

areas on the secondary (i.e., welfare) standards

SLAMS networks are designed to provide data for meeting the monitoring objectives described above and 

to assist EPA and states in solving environmental problems.

Appendix D also provides guidance on spatial scales of representativeness for stations in a SLAMS 

network (Table 1). Ideally, the monitor is located so that its sample represents the air quality over the 

entire area that the monitoring station is intended to represent (Table 2).

Table 1: Relationship between Monitoring Objectives and Scale of 

Representativeness

Monitoring Objectives Appropriate Siting Scales

Highest concentration Micro, middle, neighborhood, urban

Population Neighborhood, urban

Source impact Micro, middle, neighborhood

General/Background Neighborhood, urban, regional

Regional transport Urban/regional

Welfare-related impacts Urban/regional

Table 2: Summary of Spatial Scales for SLAMS

Scales Applicable for SLAMS

SO2 CO O3 NO2 Pb PM10 PM2.5

Micro..............     

Middle............       

Neighborhood       

Urban.............      

Regional.........     

Number of State and Local Air Monitoring Stations

Appendix D to 40 CFR Part 58 does not contain criteria for determining the total number of stations in the 

SLAMS network, except for requiring a minimum number of SLAMS lead, SO2, and PM2.5 sites. For 

lead, EPA requires state and local agencies to focus their network design efforts on establishing 

monitoring stations around lead stationary sources which generate or have the potential to generate 

exceedances of the quarterly lead NAAQS. Sources around which lead monitoring networks should be 

established are those emitting half ton or more per year. Other factors affect the number of stations in the 

network.

SLAMS SO2 monitoring requirements for counties not within the boundaries of any Consolidated 

Metropolitan Statistical Area/Metropolitan Statistical Area (CMSA/MSA) are based on the emissions of 

SO2 in the airshed. A minimum number of SO2 SLAMS sites are required for targeted sources of SO2 

emissions. Other than these requirements, the optimum size of a particular SLAMS network involves 

tradeoffs between data needs and available resources which can best be resolved during the network 

design process.
3

Appendix E Requirements

Appendix E contains siting criteria to be applied to ambient air quality analyzers or samplers after the 

general site location has been selected based on the monitoring objectives and spatial scales of 

representativeness presented in Appendix D and summarized in Section 2.1 of this document. The siting 

criteria presented in Appendix E are summarized in Table 3.

Other Ambient Air Monitoring Data Needs

Washington has used special purpose monitors (SPMs) throughout the State. They are used for a variety 

of purposes, including Washington’s Air Quality Advisory program, ambient air quality assessment and 

special studies such as secondary aerosol and ozone precursor assessments SPM monitoring sites often 

utilize Federal Reference Method (FRM) sampling equipment, and are operated in accordance with CFR 

requirements for quality assurance and quality control. SPM designation for criteria pollutant monitoring 

sites allows Ecology to assess ambient particulate levels within regions of the State, while providing the 

flexibility to relocate the sites if it is determined there is no concern for NAAQS violations in the area 

(typically after three years of data collection). SPM sites may be added to Ecology’s SLAMS network 

when a NAAQS exceedance has been recorded, or if elevated pollutant concentrations are consistently 

measured at the site. 
4

Table 3: Summary of Probe and Monitoring Path Siting Criteria

Pollutant

Scale 

[maximum 

monitoring 

path length, 

meters]

Height from ground 

to probe or 80% of 

monitoring path 

(meters)

Horizontal and vertical 

distance from 

supporting structures 

to probe or 90% of 

monitoring path 

(meters)

Distance from 

trees to probe or 

90% of 

monitoring path 

(meters)

SO2

Middle [300m] 

Neighborhood, 

Urban, and 

Regional 

[1km]

3-15 >1 >10

CO

Micro, Middle 

[300m] 

Neighborhood 

[1km]

3±0.5; 3-15 >1 >10

O3

Middle [300m] 

Neighborhood, 

Urban, and 

Regional 

[1km]

3-15 >1 >10

Ozone 

precursors

Neighborhood 

and urban 

[1km]

3-15 >1 >10

NO2

Middle [300m] 

Neighborhood 

and Urban 

[1km]

3-15 >1 >10

PM10

Micro; Middle, 

Neighborhood, 

Urban and 

Regional

2-7 (Micro);

2-15 (All other 

scales)

>2 (All scales, 

horizontal distance only) >10 (All scales)

Network Review Procedure

Network Review Team and Preparation

Network report participants include the Washington State Department of Ecology Air Quality staff.

Sufficient information is provided to determine compliance of the network with regulatory network 

design and siting requirements specified in 40 CFR Part 58, Appendices D and E as to determine 

compliance of the network design and siting requirements specified for all special ambient air monitoring 

networks.

Network Modifications

Modifications to the SLAMS network are addressed in 40 CFR 58.25, 58.36, and 58.46, respectively. 

Under Section 58.25, States are required to annually develop and implement schedules to modify the 

SLAMS network to eliminate any unnecessary stations or to correct any inadequacies indicated by the 

annual network review required by 58.20(d). As part of the annual network review, evaluations of the 

special networks established as partnership agreements between EPA and Ecology should also be 

conducted. Modifications to these networks should be recommended as a result of this annual report.
5

An important objective of the network modification process is determining whether or not sufficient 

ambient air quality information and data are being provided by the regulatory and other special 

monitoring networks to satisfy the principal data needs. If sufficient air quality data are not being 

collected, the deficient area must be identified and corrective action taken to resolve the problem. 

Conversely, if it is determined that excessive data are being collected (e.g., there are redundant sites 

resulting in data that agree closely), then efforts need to be taken to determine where disinvestment 

should be made and on what schedule.

Network modifications may be initiated by EPA or proposed by Ecology and agreed to by EPA. Network 

modifications may result from revisions to the Part 58 regulations, systems audits, site visits, or 

performance evaluations; special studies/saturation sampling, population increases/decreases; air quality 

concentrations consistently recorded below the NAAQS; loss of permission to use a site; demolition of a 

building which is used for monitoring; building construction; growth of trees; changes in roadways; 

change in neighborhood type of use, etc.

Determining Compliance with Appendix D and Special Monitoring 

Requirements

Ecology uses this review to determine whether it is meeting the number of monitors required by the Part 

58 Appendix D design criteria requirements, and whether the monitors properly located based on the 

monitoring objectives and spatial scales of representativeness presented in Appendix D. 

Number and Location of Monitors

For SLAMS, the number of monitors required and their locations are not specified in the regulations but 

rather are determined by EPA Region 10 and Ecology on a case-by-case basis. EPA and Ecology ensure 

that SLAMS meet the monitoring objectives specified in Appendix D. Adequacy of the network is be 

determined by using a variety of tools. Appropriate location of monitors can be determined on the basis 

of stated objectives. 

Monitor locations are based on the objectives specified in Appendix D, Section 3. Most often, these 

locations are those that have high concentrations and large population exposure. Population information 

may be obtained from the latest census data and ambient monitoring data from AQS. If zip codes for 

various monitoring locations are obtained, use of electronic media census information and GIS-based 

information can be more easily combined with ambient monitoring data.

For special monitoring needs, program documents applicable to the network must be reviewed to 

determine the goals and specific siting criteria for the network. Compliance with monitoring objective 

determinations of the special network should be conducted using procedures similar to those used for 

Appendix D evaluations (are the number of monitors appropriate and are the monitors properly located).

Determining Compliance with Appendix E Requirements

Applicable siting criteria for SLAMS are specified in 40 CFR 58, Appendix E. The on-site visit itself 

consists of the physical measurements and observations needed to determine compliance with the 

Appendix E requirements, such as height above the ground level, distance from trees, paved or vegetative

ground cover, etc.
6

Network Evaluation and 

Recommendations/Modifications

Carbon Monoxide (CO, 42101)

National Ambient Air Quality Standard (NAAQS):

• 1-hour average concentration not to exceed 35 ppm, on more than one occasion in a calendar 

year, measured at any monitoring site.

• 8-hour average concentration not to exceed 9 ppm for any 8-hour period, on more than one 

occasion in a calendar year, measured at any monitoring site.

Washington’s carbon monoxide monitoring network is comprised of one site statewide.

Table 4: Carbon Monoxide, 42101

AQS # Site Name Est. Type Scale Sampling 

Frequency

Action for 

2012

530630049 Spokane, 3rd & Washington 1/1/97 SLAMS Micro Continuous Continue*

Additional Monitors: Trace level carbon monoxide is monitored at the Seattle Beacon Hill and Cheeka 

Peak NCore sites. One carbon monoxide monitor is scheduled to be collocated with NO2 monitoring at 

the Seattle area near-roadway site in 2013. 

*Recommendations/Modifications: Ecology and its partners have divested of traditional CO 

monitoring and believe continuing to do so is the best use of state resources. Ecology plans to monitor for 

near-roadway CO as described in the revised CO rule starting in 2013. 

Spokane, 3rd & Washington – SLAMS 

AQS # 530630049 Method code: 054

Address: W. 408 3rd Avenue, Spokane LAT/LONG: 047 39' 13" / 117 25' 07"

Monitoring objective: Highest Concentration MSA: Spokane, WA

Comments 

3rd & Washington is a micro scale SLAMS site established in 1997. It is located in the downtown core of 

Spokane in a highly-traveled commercial area. The site is currently used for maintenance plan purposes. 

Spokane is a former CO nonattainment area.

Exceedences

This site has not exceeded the daily or annual standard for CO in more than 10 years.
7

Ozone (O3, 44201)

National Ambient Air Quality Standards (NAAQS):

• 8-hour average of the 4th highest measured O3 concentration averaged over three consecutive 

years, not to exceed 0.075 ppm at any given monitoring site.

Washington’s ozone monitoring network is comprised of ten sites statewide.

Table 5: Ozone, 44201

AQS # Site Name Est. Type Scale Sampling 

Frequency

DV 

(2012)

Action

For 2012

530630001 Cheney, Turnbull 4/1/99 SLAMS Urban Continuous 0.057 Continue

530730005 Custer/Loomis 5/89 SLAMS Urban Continuous 0.045 Continue

530330023 Enumclaw, Mud Mtn. 7/8/98 SLAMS Urban Continuous 0.067 Continue

530330010 Issaquah, Lake Sam 12/1/75 SLAMS Urban Continuous 0.057 Continue

530530012 Mt. Rainier, Jackson 

Visitor Center

7/13/98 SLAMS NPS supported Continuous 0.053 Continue

530330017 North Bend, NB Way 6/1/98 SLAMS Urban Continuous 0.059 Continue

530330080 Seattle, Beacon Hill 4/1/97 NCore Urban Continuous 0.045 Continue

530630046 Spokane, Greenbluff 4/1/90 SLAMS Urban Continuous 0.057 Continue

530110011 Vancouver, Blairmont 4/1/90 SLAMS Neighborhood Continuous 0.057 Continue

530670005 Yelm, Northern Pacific 5/1/06 SLAMS Urban Continuous 0.056 Continue

Additional Monitors: None. Ecology provides support for ozone monitoring performed by local air 

agencies in Anacortes and Spokane. 

Recommendations/Proposed Modifications: None

Ozone

Cheney, Turnbull - SLAMS

AQS # 530630001 Method code: 056

Address: S. 26010 Smith Road, Cheney LAT/LONG: 047 24' 55" / 117 31' 49"

Monitoring objective: Population Exposure MSA: Spokane, WA

Comments

Turnbull is a background/transport scale site located at the Turnbull Wildlife Refuge, south of Spokane. 

It is a high-concentration and background/transport site for the Spokane area. A CFR required site by 

population. 

Exceedences

This site has not exceeded the 8-hour ozone standard in the past 3 years.

Custer/Loomis - SLAMS

AIRS # 530730005 Method code: 056

Address: 1330 Loomis Trail Road, Custer LAT/LONG: 048 95’ 25 / -122 55’45 

Monitoring objective: Transport MSA: Bellingham, WA

Adequacy

FCC Loomis is an urban scale Special Purpose Monitoring Site (SPMS) for Ozone established in 1989. It 

is located outside of Custer, 20 miles south of the US/Canadian border. 
8

Comments

Custer/Loomis site provides data from Canadian impacts as modeling information for the Puget Sound 

Ozone network.

Exceedences

This site has not exceeded the one or eight hour standard for Ozone in the past 3 years.

Enumclaw, Mud Mountain Dam - SLAMS

AQS # 530330023 Method code: 056

Address: 30525 SE Mud Mountain Road, Enumclaw LAT/LONG: 047 08' 28" / 121 56' 09"

Monitoring objective: Regional Transport MSA: Seattle-Bellevue-Everett, WA

Comments

Mud Mountain Dam is an urban scale State and Local Monitoring Site (SLAMS) established in 1998

located 30 miles East of Seattle, near Enumclaw. Mud Mountain is at the end of the ozone transport zone 

near the Cascade Mountains. Mud Mountain has been the highest reading site in the ozone network. 

Exceedences

This site has exceeded the 8-hour standard in the past 3 years.

Issaquah, Lake Sammamish - SLAMS

AQS # 530330010 Method code: 056

Address: 20050 SE 56th (Lk. Sammamish SP), Issaquah LAT/LONG: 047 33' 07" / 122 02' 40"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Lake Sammamish is an urban scale site established in 1975 located east of Seattle, within Lake 

Sammamish State Park. The Lake Sammamish site is a long-term trends site. 

Exceedences

This site has exceeded the 8-hour standard in the past 3 years.

Mt. Rainier, Jackson Visitor Center - SLAMS

AQS # 530530012 Method code: 056

Address: Jackson Visitor Center, Mount Rainier LAT/LONG: 046 47' 07" / 121 43' 58"

Monitoring objective: Background MSA: Tacoma, WA

Comments

The Jackson Visitor Center site is a regional scale site established in 1998. 

Exceedences

This site has not exceeded the 8-hour ozone standard in the past 3 years.

North Bend, North Bend Way - SLAMS

AQS # 530330017 Method code: 056

Address: 42404 SE North Bend Way, North Bend LAT/LONG: 047 29' 23" / 121 46' 24"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

North Bend Way is an urban scale site established in 1998 located outside of North Bend, 25 miles East 

of Seattle. North Bend typically indicates some of the highest readings in the ozone network.

Exceedences

This site has exceeded the 8-hour ozone standard in the past 3 years.
9

Seattle, Beacon Hill – NCore 

AQS # 530330080 Method code: 056

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Beacon Hill is an urban scale NCORE site located south of downtown Seattle, within a City of Seattle 

park/reservoir. In addition to ozone, the site is used for monitoring trace level CO, SO2, NO2, PM2.5, air 

toxics, speciation and other studies. Seattle Beacon Hill is also a long-term trend and research site.

Exceedences

This site has not exceeded the 8-hour standard.

Spokane, Greenbluff - SLAMS

AQS # 530630046 Method code: 056

Address: E. 9814 Greenbluff Road, Spokane LAT/LONG: 047 49' 37" / 117 16' 31"

Monitoring objective: Population Exposure MSA: Spokane, WA

Comments

Greenbluff is an urban scale site located near Spokane. Greenbluff is used with Cheney to identify ozone 

patterns for the Spokane area. It is a CFR population required site.

Exceedences

This site has not exceeded the 8-hour ozone standard in the past 3 years.

Vancouver, Blairmont - SLAMS

AQS # 530110011 Method code: 056

Address: 1500 SE Blairmount Drive, Vancouver LAT/LONG: 045 36' 37" / 122 30' 59"

Monitoring objective: Population Exposure MSA: Portland-Vancouver, OR-WA

Comments

Blairmont is an urban scale site, near downtown Vancouver. The site represents the Portland/Vancouver 

airshed and part of the ozone maintenance planning effort of the Southwest Clean Air Agency (SWCAA).

Exceedences

This site has exceeded the 8-hour ozone standard in the past 3 years.

Yelm, Northern Pacific - SLAMS

AQS # 530670005 Method code: 056

Address: NEW - 931 Northern Pacific Road, Yelm LAT/LONG: 046 57' 03" / 122 35' 43"

Monitoring objective: Population Exposure MSA: Olympia, WA

Comments

Yelm is an urban scale site originally established in 1997 and relocated in 2006. The Yelm site is located 

in a commercial/residential area. Yelm represents ozone transport impacts in the South Puget Sound area.

Exceedences

This site has exceeded the 8-hour ozone standard in the past 3 years.
10

Nitrogen Dioxide (NO2, 42602)

National Ambient Air Quality Standards (NAAQS):

• Annual arithmetic average concentration not to exceed 0.053 ppm at any monitoring site.

• New 1-hour NO2 standard at the level of 100 parts per billion (ppb).

Washington’s nitrogen dioxide monitoring network is comprised of three sites statewide. Two NOy

monitors are located at NCore sites. One NO2 monitor will be sited in 2013 as part of the near-roadway 

network.

Table 6: Nitrogen Dioxide 42602

AQS # Site Name Est. Type Scale Sampling 

Frequency

Action for 

2012

530330080 Seattle Beacon Hill 4/1997 NCore Urban Continuous Continue

TBD Seattle/10th & Weller 1/2013 SLAMS Micro Continuous Planning

TBD Tacoma 1/2014 SLAMS Micro Continuous Planning

Additional Monitors: None

Recommendations/Proposed Modifications: Ecology monitors for the reactive nitrogen species (NOy) 

at NCore Seattle Beacon Hill which includes NO2. Olympic Region Clean Air Agency (ORCAA) 

monitors for the reactive nitrogen species (NOy) at NCore Cheeka Peak.

It is assumed most if not all the NOy measured at Beacon Hill and Cheeka Peak is composed of NO2.

Comment: One NO2 monitor will be sited in 2013 as part of the EPA near-road network as funding and 

permitting are allowed. A second near-road NO2 monitor is planned for 2014.

Seattle, Beacon Hill - NCore 

AQS #530330080 Method code: 118/181

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle, Beacon Hill is an urban scale NCORE site. Seattle Beacon Hill is collocated with an FEM, FRM, 

meteorological equipment as well as toxics and speciation monitoring.
11

NEAR-ROAD NO2 MONITORS

• At least one monitor would be required near a major roadway in any urban area with a population 

greater than or equal to 350,000 people

• A second monitor would be required near a major road in areas with either

o A population greater than 2.5 million people, or

o One or more road segments with an annual average daily traffic count greater than or equal to 

250,000 vehicles

o NO2 monitors area to be located within 20-50 meters of major roadways

• Potential impact on Washington

o 2 monitors in the Seattle-Tacoma-Bellevue, WA MSA

o 1 monitor in the Portland-Vancouver Beaverton, OR-WA MSA (ODEQ)

AREA-WIDE NO2 MONITORING

• One monitor in each MSA with 1,000,000 or more population to monitor the location of expected 

highest NO2 concentrations representing neighborhood or larger spatial scales

• Some flexibility for the use of an existing monitor

• Potential impact on Washington

o 1 monitor in the Seattle-Tacoma-Bellevue, WA MSA (Seattle Beacon Hill)

o Total of 1 monitor in the bi-state Portland-Vancouver Beaverton, OR-WA MSA (ODEQ)
12

Sulfur Dioxide (SO2, 42401)

National Ambient Air Quality Standards (NAAQS)

• Annual arithmetic average concentration not to exceed 0.03 ppm at any monitoring site.

• New one hour primary standard of 75ppb

Table 7: Sulfur Dioxide 42401

AQS # Site Name Est. Type Scale Sampling 

Frequency

Action for 

2012

530330080 Seattle Beacon Hill 4/1997 NCore Urban Continuous Continue

Additional Monitors: None

Recommendations/Proposed Modifications: Ecology monitors for trace level SO2 at Seattle Beacon 

Hill.

Comment: Based on the Primary NAAQS for Sulfur Dioxide, Washington will be required to site and 

operate a new SO2 monitor January 1, 2013. SO2 monitoring is based on CBSA’s, the Population 

Weighted Emissions Index (PWEI) and the national emissions inventory (NEI). SO2 monitors will be 

proposed in the 2012 network plan and implemented in 2013. 

Seattle, Beacon Hill - NCore 

AQS #530330080 Method code: 118/181

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle, Beacon Hill is an urban scale NCORE site. Seattle Beacon Hill is collocated with an FEM, FRM, 

meteorological equipment as well as toxics and speciation monitoring.

Population Weighted Emissions Index (PWEI) / national emissions inventory (NEI)

• Potential impact on Washington

o 1 monitor in the Seattle-Tacoma-Bellevue, WA MSA (PWEI, 45,728)

o 1 monitor in the bi-state Portland-Vancouver Beaverton, OR-WA MSA (ODEQ) (PWEI, 

27,863)
13

Particulate Matter 10 (PM10, 81102)

National Ambient Air Quality Standard (NAAQS), 1987:

• Twenty-four hour average PM10 concentration not to exceed 150 μg/m3 on more than 

one occasion per year when averaged over three years.

• Due to a lack of evidence linking health problems to long-term exposure to coarse 

particle pollution, the EPA revoked the annual PM10 standard in 2006 (effective 

December 17, 2006). 

Washington’s PM10 monitoring network consists of 4 sites statewide, including one collocated site.

Table 8: Particulate Matter 10 PM10, 81102

AQS# Site Name Est. Type Scale Sampling

Type

Action for 

2012

530650004 Colville, S Oak 11/96 SLAMS Neighborhood Continuous Continue

530050002 Kennewick, 

Metaline Ave

10/94 SLAMS Neighborhood Continuous Continue

530630021 Spokane, Augusta 

Ave.

3/09 SLAMS Middle 1/6 Continue 

530630021 Spokane, Augusta 

Ave.

3/09 Collocated Middle 1/12 Continue

530770009 Yakima, S 4th 4/00 SLAMS Neighborhood 1/6 Continue

Additional Monitors: None

Recommendations/Proposed Modifications: None

PM10

Colville, S Oak - SLAMS

AQS # 530650004 Method code: 079

Address: 215 South Oak, Colville LAT/LONG: 048 32' 41" / 117 54' 13"

Monitoring objective: Population Exposure MSA: Not in an urban area

Comments

S Oak is a neighborhood scale site for PM10 established in 1996, located in the commercial/residential 

area of Colville.

Exceedences

This site has exceeded the standard for PM10 in the past 3 years. 

Kennewick, Metaline Ave - SLAMS

AQS # 530050002 Method code: 079

Address: 5929 West Metaline, Kennewick LAT/LONG: 046 13' 06" / 119 12' 03"

Monitoring objective: Population Exposure MSA: Richland-Kennewick-Pasco, WA

Comments

Metaline is a neighborhood scale site for PM10 established in 1994 and located in the downtown 

Kennewick area. It is representative of Kennewick which is subject to windblown dust.

Exceedences

This site has not exceeded the standard for PM10 in the past 3 years. 
14

Spokane, Augusta Ave. - SLAMS

AQS # 530630021 Method code: 079/063

Address: 3104 E. Augusta Ave., Spokane LAT/LONG: 047 39' 39" / 117 21' 26"

Monitoring objective: Population Exposure MSA: Spokane, WA

Comments

Augusta Ave. is a middle scale site for PM10 established in 1972, located in a commercial area of 

Spokane. The site is representative of the Spokane area which is a past PM10 nonattainment area.

Exceedences

This site has not exceeded the standard for PM10 in the past 3 years.

Yakima, S 4th – SLAMS 

AQS # 530770009 Method code: 079/063

Address: 402 South 4th Avenue, Yakima LAT/LONG: 046 35' 42" / 120 30' 44"

Monitoring objective: Population Exposure MSA: Yakima, WA

Comments

S 4th is a neighborhood scale site for PM10 located in a commercial/residential area near downtown 

Yakima. The site is representative of the Yakima area which was a past PM10 nonattainment area. 

Exceedences

This site has not exceeded the daily or annual standard for PM10 in the past 3 years.
15

Particulate Matter 2.5 (PM2.5, 88101, 88502)

National Ambient Air Quality Standard (NAAQS):

• 3-year average of the 98th percentile 24-hour concentration not to exceed 35ug/m3 at any 

population-oriented monitoring site in a monitoring area.

• Three-year annual average PM2.5 concentration not to exceed 15 μg/m3 from a single 

community-oriented monitoring site or the spatial average of eligible community-oriented 

sites in a monitoring area. 

Washington’s PM2.5 monitoring network consists of forty sites, plus one collocated site.

Table 9: Particulate Matter PM2.5, 88101, 88502

AQS# Site Name Type Sample Type Sampling 

Frequency

Design 

Value 2012

Action for 

2012

530272002 Aberdeen Division St SLAMS Continuous Continuous 11 Continue 

530330037 Bellevue, Bellevue Way SLAMS Continuous Continuous 12.5 Continue

530730015 Bellingham, Yew Street SLAMS Continuous Continuous 15.1 Continue 

530350007 Bremerton Spruce*NEW SPMS Continuous Continuous N/A Continue

530030004 Clarkston SLAMS Continuous Continuous 20.3 Continue

530410004 Chehalis SLAMS Continuous Continuous * Continue

530650004 Colville SLAMS Continuous Continuous 24.2 Continue

530610020 Darrington, Fir St SLAMS Continuous Continuous 32.2 FRM Continue

530130002 Dayton, W. Main SLAMS Continuous Continuous 13.2 Continue

530370002 Ellensburg SLAMS Continuous Continuous 27.2 Continue

530050002 Kennewick, Metaline Ave SLAMS Continuous Continuous 17.5 Continue 

530332004 Kent, James & Central SPMS Continuous Continuous 22.1 Continue 

530670013 Lacey, College St SLAMS Continuous Continuous 20.5 Continue

530750005 LaCrosse, Hill St SLAMS Continuous Continuous 11 Continue

530330024 Lake Forest Park, Ballinger Way SLAMS Continuous Continuous 22.6 Continue

530150015 Longview, 30th Ave SLAMS Continuous Continuous 15.8 Continue

530610005 Lynnwood, 212th SPMS Continuous Continuous 20 Continue 

530611007 Marysville, 7th Ave SLAMS Continuous Continuous 30.2 FRM Continue

530351005 Meadowdale, Blackbird Dr SPMS Continuous Continuous 24.5 Discontinued

530210002 Mesa, Pepoit Way SLAMS Continuous Continuous 15.7 Continue

530251002 Moses Lake, Balsam St SLAMS Continuous Continuous 16.2 Continue

530570015 Mt. Vernon, S Second St SLAMS Continuous Continuous 11 Continue

530330017 North Bend, North Bend Way SLAMS Continuous Continuous 13.9 Continue

530090009 Port Angeles, W 14th St SLAMS Continuous Continuous 16.1 Continue

530310003 Port Townsend, San Juan Ave SLAMS Continuous Continuous 14.7 Continue

530750003 Pullman, Dexter Ave SLAMS Continuous Continuous 13.4 Continue

530531018 Puyallup, 128th St SLAMS Continuous Continuous 22.3 Continue

530010003 Ritzville, Alder St SLAMS Continuous Continuous 12.9 Continue

530750006 Rosalia, Josephine St SLAMS Continuous Continuous 11.5 Continue

530330080 Seattle, Beacon Hill NCore SEQ/Continuous 1/3 15 FRM Continue

530330057 Seattle, E Marginal Way SPMS Continuous Continuous 22.2 Continue

530330048 Seattle, Olive St SLAMS Continuous Continuous 15.3 Continue

530450007 Shelton, W. Franklin SLAMS Continuous Continuous 18.4 Continue 

530630021 Spokane, Augusta SLAMS SEQ/Continuous 1/6 24.5 FRM Continue

530630021 Spokane, Augusta Co-loc SEQ 1/12 24.5 FRM Relocated

530630047 Spokane, Monroe Street SLAMS Continuous Continuous 19.7 Continue

530530031 Tacoma, Alexander Ave SLAMS Continuous Continuous 22 Continue
16

AQS# Site Name Type Sample Type Sampling 

Frequency

Design 

Value 2012

Action for 

2012

530530029 Tacoma, S L Street SLAMS SEQ/Continuous 1/1 34.9 FRM Continue

530530029 Tacoma, S L Street Co-loc SEQ/Continuous 1/12 Begin 4/12 Begin 4/12

530110013 Vancouver, 4th Plain SLAMS SEQ/Continuous 1/3 29.9 FRM Continue

530710005 Walla Walla, 12th St SLAMS Continuous Continuous 18 Continue

530070006 Wenatchee SLAMS Continuous Continuous 29.7 Continue

530110022 Yacolt, Yacolt Rd. SLAMS Continuous Continue 16 Continue

530770009 Yakima, S 4th Ave SLAMS SEQ/Continuous 1/3 34.8 FRM Continue

Asterisk * denotes sites with less than 3 years data. 

Note: Ecology uses the Washington Air Quality Advisory (WAQA) for reporting PM2.5 to inform and 

protect citizens of Washington. WAQA reporting is more protective of human health. Ecology’s goal is to

keep 24-hour concentrations below 20 ug/m3

. 

In addition, some monitors in areas of Washington are not intended to be solely NAAQS based. Certain 

monitors are used for protection of human health by calling burn bans during home heating season,

making daily decisions for agricultural burning and health information- reporting PM2.5 values. 

Additional Monitors: None

Recommendations/Modifications: Bremerton Meadowdale site has been relocated to Bremerton Spruce 

to meet EPA siting criteria. Continue all other sites as described. 

PM2.5

Aberdeen, Division St - SLAMS 

AQS #530272002 Method code: 771

Address: 359 North Division, Aberdeen LAT/LONG: 046 58' 21" / 123 49' 54"

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an MSA

Comments

The Aberdeen site is neighborhood scale. The site represents impacts to the Aberdeen and Grays Harbor 

area from smoke related to home heating and mobile sources and is used for curtailment calls during the 

home heating season.

Bellevue, Bellevue Way - SLAMS 

AQS #530330037 Method code: 771

Address: 305 Bellevue Way, Bellevue LAT/LONG: 047 36' 47" / 122 12' 06"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

The Bellevue Way site is neighborhood scale. It is representative of mobile source and smoke impacts in 

the area and used for curtailment calls during the home heating season.
17

Bellingham, Yew Street - SLAMS 

AQS #530730015 Method code: 771

Address: 2420 Yew Street, Bellingham LAT/LONG: 048 45' 46" / 122 26' 25"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Bellingham, WA

Comments

Bellingham, Yew Street site is neighborhood scale. It is impacted by smoke related to home heating in the 

Bellingham/Whatcom County area and used for curtailment calls during the home heating season.

Bremerton, Spruce - SPMS * NEW

AQS # 530350007 Method code: 771/181

Address: 3250 Spruce Ave, Bremerton LAT/LONG: 047 59' 26" / 122 62' 73"

Sampling: Nephelometer & FEM continuous

Monitoring objective: Population Exposure MSA: Bremerton, WA

Comments

Bremerton Spruce replaced Bremerton Meadowdale in 2012. Bremerton Spruce is a neighborhood scale 

residential site which meets EPA siting criteria. It provides air quality information to a population of 

280,000 Kitsap residents. 

Chehalis, Market Blvd – SLAMS 

AQS # 530410004 Method code: 771

Address: 350 N. Market, Chehalis LAT/LONG: 046 66’40”/122 96’73” 

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Chehalis is a neighborhood scale site established in late 2009. It is located in a mixed/residential 

area of Chehalis. It is impacted by smoke from home heating and used for curtailment calls during the 

home heating season.

Clarkston, STP – SLAMS

AQS # 530030004 Method code: 771

Address: 13th Street and Port Way, Clarkston LAT/LONG: 046 25' 32”/ 117 3' 35”

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Clarkston is a neighborhood scale site established in 1993 as a PM10 site and converted to PM2.5

in 2007, is located in a mixed/residential area of Clarkston. 

Colville – SLAMS

AQS # 530650004 Method code: 771

Address: 215 S. Oak Street, Colville LAT/LONG: 048 32' 41" / 122 54' 13"

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

S Oak is a neighborhood scale site for PM2.5 originally established in 1996 as a PM10 site and converted 

to PM2.5 in 2009, is located in the commercial/residential area of Colville.
18

Darrington, Fir St – SLAMS/SPMS

AQS #530610020 Method code: 118/181

Address: 1085 Fir St, Darrington LAT/LONG: 048 14' 49" / 121 36' 11"

Sampling: FRM 1/3 & FEM continuous

Monitoring objective: Population Exposure MSA: Not in an urban area

Comments

Darrington is neighborhood scale residential site impacted by smoke from home heating. This site has an 

FRM and is suitable for comparison to the PM2.5 NAAQS.

Dayton, 206 W. Main - SLAMS 

AQS # 530130002 Method code: 771

Address: 206 W. Main, Dayton LAT/LONG: 046.3180”/ 117.9850

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Dayton is a neighborhood scale small-community site located in Eastern Washington impacted by smoke

from burning activities in the area.

Ellensburg, Ruby St - SLAMS

AQS # 530370002 Method code: 771

Address: 201 North Ruby Street, Ellensburg LAT/LONG: 046 59' 37" / 120 32' 42"

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an urban area

Comments

Ellensburg is a neighborhood scale site established in 1995 as a PM10 site and converted to PM2.5 in 2006.

It is located in a residential area of Ellensburg impacted by smoke from home heating devices and used 

for curtailment calls during the home heating season.

Kennewick, Metaline Ave - SLAMS 

AQS #530050002 Method code: 771

Address: 5929 W Metaline, Kennewick LAT/LONG: 046 13' 06" / 119 12' 03"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Richland, Kennewick, and Pasco, WA

Comments

Kennewick is neighborhood scale site. The site is impacted from smoke from home heating devices and 

agricultural sources and is geographically representative of the Tri-Cities area. Kennewick is used for 

curtailment calls during the home heating season.

Kent, James & Central – SPMS

AQS #530332004 Method code: 181

ADDRESS: 614 N Railroad, Kent LAT/LONG: 047 23' 10" / 122 13' 55"

Sampling: FEM continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Kent is neighborhood scale site in the South Puget Sound that is impacted from mobile sources, light 

industry, smoke from home heating devices. The site is representative of the Kent Valley area.
19

Lacey, College St - SLAMS 

AQS #530670013 Method code: 771

Address: 1900 College St SE, Lacey LAT/LONG: 047 01' 43" / 122 49' 15"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Olympia, WA

Comments

Lacey, College St is a neighborhood scale site impacted by smoke from home heating devices. The site is 

representative of the Olympia/Thurston County area.

LaCrosse, Hill St - SLAMS 

AQS #530750005 Method code: 771

Address: 100 Hill Street, LaCrosse LAT/LONG: 046 48' 55" / 117 52' 26"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an urban area

Comments

LaCrosse is neighborhood scale small-community monitor in Eastern Washington impacted by smoke 

from burning. LaCrosse is used for daily agricultural burn decisions and curtailment calls during the 

home heating season .It also provides modeling and mapping information.

Lake Forest Park, Ballinger Way - SLAMS 

AQS #530330024 Method code: 702/704

Address: 17171 Bothell Way NE, Lake Forest Park LAT/LONG: 047 45' 18" / 122 16' 50"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Lake Forest Park is neighborhood scale site impacted by smoke from home heating devices and mobile 

sources from two adjacent arterials. It is used for curtailment calls during the home heating season.

Longview, 30th Ave - SLAMS 

AQS #530150015 Method code: 771

Address: 1324 30th Ave, Longview LAT/LONG: 046 08' 22" / 122 57' 43"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Longview, WA

Comments

Longview is a neighborhood scale site impacted by smoke from home heating. It is representative of the 

Longview/Kelso area and is used for curtailment calls during the home heating season.

Lynnwood, 212th - SPMS

AQS #530610005 Method code: 181

Address: 6120 212th SW, Lynnwood LAT/LONG: 047 48' 23" / 122 19' 00"

Sampling: FEM continuous

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Lynnwood is neighborhood scale site impacted by smoke during the home heating season. Lynnwood is 

representative of south Snohomish County.
20

Marysville, 7th Ave – SLAMS/SPMS*

AQS #530611007 Method code: 118/181

Address: 1605 7th ST, Marysville LAT/LONG: 048 03' 18" / 122 10' 33"

Sampling: FRM 1/3 & FEM continuous

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Marysville is a neighborhood scale site impacted by smoke during the home heating season, mobile 

sources, and light industry. It is representative of the Marysville/North Snohomish County area. The site 

has an FEM & FRM and is suitable for comparison to the PM2.5 NAAQS.

Mesa, Pepoit Way - SLAMS 

AQS #530210002 Method code: 771

Address: 200 Pepiot Way, Mesa LAT/LONG: 046 34' 32" / 119 00' 25"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an urban area 

Comments

Mesa is a neighborhood scale small-community site in Eastern Washington impacted by agricultural 

sources and smoke from home heating. It is used for daily agricultural burn decisions and curtailment 

calls during the home heating season.

Moses Lake, Balsam St - SLAMS 

AQS #530251002 Method code: 771

Address: 412 S Balsam St, Moses Lake LAT/LONG: 047 07' 50" / 119 16' 22"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an urban area

Comments

Moses Lake is a neighborhood scale small-community site in Eastern Washington impacted by 

agricultural sources and smoke from home heating sources. It is used for daily agricultural burn decisions 

and curtailment calls during the home heating season.

Mt. Vernon, S Second St - SLAMS 

AQS #530570015 Method code: 771

Address: 1600 South Second St, Mount Vernon LAT/LONG: 048 24' 37" / 122 20' 16"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an urban area

Comments

Mt. Vernon is a neighborhood scale small-community site impacted by home heating devices. Mt. Vernon 

is used for curtailment calls during the home heating season. 

North Bend, North Bend Way - SLAMS 

AQS #530330017 Method code: 771

Address: 42404 SE North Bend Way, North Bend LAT/LONG: 047 29' 23" / 121 46' 24"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

North Bend is a neighborhood scale transport/background PM2.5 site for the Puget Sound impacted by 

smoke from home heating devices. North Bend is used for curtailment calls during the home heating 

season. North Bend is collocated with ozone and meteorological equipment.
21

Port Angeles, W 14th St - SLAMS 

AQS #530090009 Method code: 771

Address: 1139 W 14th St., Port Angeles LAT/LONG: 048 06' 59" / 123 27' 52"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an MSA

Comments

Port Angeles is a neighborhood scale site adjacent to Olympic National Park, a Class 1 Area and impacted 

by smoke from home heating sources. Port Angeles is used for curtailment calls during the home heating 

season.

Port Townsend, San Juan Ave - SLAMS 

AQS #530310003 Method code: 771

Address: 3939 San Juan Avenue, Port Townsend LAT/LONG: 048 07' 45" / 122 46' 46"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an MSA

Comments

Port Townsend is neighborhood scale SLAMS site impacted by smoke from home heating devices. Port 

Townsend is used for curtailment calls during the home heating season. It is representative of the east 

Jefferson County area.

Pullman, Dexter Ave - SLAMS 

AQS #530750003 Method code: 771

Address: 240 SE Dexter, Pullman LAT/LONG: 046 43' 28" / 117 10' 46"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an MSA

Comments

Pullman is a neighborhood scale site is in Eastern Washington impacted by smoke from burning. Pullman 

is used for daily agricultural burn decisions and curtailment calls during the home heating season. 

Puyallup, 128th St - SLAMS 

AQS #530531018 Method code: 771

Address: 9616 128th St E, Puyallup LAT/LONG: 047 08' 24" / 122 18' 01"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Puyallup is a neighborhood scale site impacted by smoke from home heating devices in the Pierce County 

South Hill area.

Ritzville, Alder St - SLAMS 

AQS #530010003 Method code: 771

Address: 109 W Alder, Ritzville LAT/LONG: 047 07' 43" / 118 22' 55"

Sampling: Continuous 

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Ritzville is a neighborhood scale small-community located in Eastern Washington impacted by smoke

from burning activities in the area. Ritzville is used for making daily agricultural burn decisions and 

curtailment calls during the home heating season.
22

Rosalia, Josephine St - SLAMS 

AQS #530750006 Method code: 771

Address: 906 S Josephine Avenue, Rosalia LAT/LONG: 047 13' 52" / 117 22' 08"

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Rosalia is a neighborhood scale small-community site located in Eastern Washington impacted by smoke

from burning in the area. Rosalia is used for making daily agricultural burning decisions and curtailment 

calls during the home heating season.

Seattle, Beacon Hill - NCore 

AQS #530330080 Method code: 118/181

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Sampling: FRM 1/3 & FEM continuous

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle, Beacon Hill is an urban scale NCORE site. Seattle Beacon Hill is collocated with an FEM, FRM, 

meteorological equipment as well as toxics and speciation monitoring.

Seattle/Duwamish - SPMS

AQS #530330057 Method code: 181

Address: 4401 E Marginal Way S., Seattle LAT/LONG: 047 56' 32" / 122 34' 05"

Sampling: FEM continuous

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle, E Marginal Way is a neighborhood scale site located in the Duwamish River Valley impacted by 

mobile source diesel emissions and industrial sources. This site is equipped with an FEM and suitable for 

comparison to the PM2.5 NAAQS.

Seattle, Olive St - SLAMS 

AQS #530330048 Method code: 771

Address: 1624 Boren Avenue, Seattle LAT/LONG: 047 36' 55" / 122 19' 48"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle, Olive Street was established in 2002 as a micro scale PM2.5 site adjacent to Interstate 5 designed 

to measure effects of mobile source diesel emissions. This site is not suitable for comparison to the PM2.5

NAAQS. 

Shelton, W. Franklin - SLAMS

AQS #530450007 Method code: 771

Address: 122 W. Franklin, Shelton LAT/LONG: 047 213' 55" / 123 100' 81"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Not in an MSA

Comments

Shelton is a neighborhood scale site established in 2001 and relocated in April of 2011. Shelton is 

impacted by smoke from home heating devices and used for curtailment calls during the home heating 

season.
23

Spokane, Augusta - SLAMS 

AQS #530630021 Method code: 118/702/704

Address: 3104 E. Augusta Ave., Spokane LAT/LONG: 047 39' 39" / 117 21' 26"

Sampling: FRM 1/3 & continuous 

Monitoring objective: Population Exposure MSA: Spokane, WA

Comments

Spokane Augusta Ave. is a neighborhood scale site impacted by smoke from home heating devices and

light industrial sources. The site is equipped with an FRM and suitable for comparison to the PM2.5

NAAQS.

Spokane, Monroe Street - SLAMS 

AQS #530630047 Method code: 771

Address: N 4601 Monroe St., Spokane LAT/LONG: 047 42' 03" / 117 25' 30"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Spokane, WA

Comments

Spokane, Monroe St. is a neighborhood scale site impacted by smoke from home heating devices and is 

representative of the area.

Tacoma, Alexander Ave - SLAMS 

AQS #530530031 Method code: 771 

Address: 2301 Alexander Avenue, Tacoma LAT/LONG: 047 15' 56" / 122 23' 09"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Tacoma, Alexander Ave is a neighborhood scale site impacted by smoke from home heating devices and 

industrial point sources on the Tacoma Tide flats. The site is representative of the NE Tacoma/Fife area.

Tacoma, S L St - SLAMS/SPMS

AQS #530530029 Method code: 118/181

Address: 7802 South L St., Tacoma LAT/LONG: 047 11' 11" / 122 27' 06"

Sampling: FRM 1/1 & FEM continuous 

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Comments

Tacoma, L Street is a neighborhood scale site impacted by smoke from home heating devices. The site is 

equipped with an FEM & FRM and suitable for comparison to the PM2.5 NAAQS.

Vancouver, 4th Plain – SLAMS/SPMS

AQS #530110013 Method code: 118/771

Address: 8205 E 4th Plain Boulevard, Vancouver LAT/LONG: 045 38' 55" / 122 35' 16"

Sampling: FRM 1/3 & continuous – FEM in 2011

Monitoring objective: Population Exposure MSA: Portland-Vancouver, OR-WA

Comments

Vancouver, 4th Plain is a neighborhood scale site impacted by smoke from home heating devices. The 

site is equipped with an FRM and suitable for comparison to the PM2.5 NAAQS.
24

Walla Walla, 12th St - SLAMS 

AQS #530710005 Method code: 771

Address: 200 S 12th, Walla-Walla LAT/LONG: 046 03' 32" / 118 21' 06"

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Walla Walla is a neighborhood scale small-community site located in Eastern Washington impacted by 

smoke from burning activities in the area.

Wenatchee, Alaska Way - SLAMS

AQS # 530070006 Method code: 771

Address: 600 Alaska Street, Wenatchee LAT/LONG: 047 25' 06" / 120 19' 14"

Sampling: Continuous

Monitoring objective: Population Exposure UA: Not in an urban area

Comments

Wenatchee, Alaska Way is a neighborhood scale site established in 1994 as a PM10 site and converted to 

PM2.5 in 2006. It is located in a residential area of Wenatchee impacted by smoke from multiple sources 

including home heating devices and wildfires. 

Yacolt, Yacolt Rd. – SLAMS

AQS #530110022 Method code: 771

Address: 406 W. Yacolt Rd., Yacolt LAT/LONG: 045 86' 63" / 122 40' 88"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Vancouver, WA

Comments

Yacolt is a neighborhood scale site impacted by smoke from home heating devices and is representative 

of the area. 

Yakima, S 4th Ave – SLAMS/SPMS

AQS #530770009 Method code: 118/771

Address: 402 South 4th Avenue, Yakima LAT/LONG: 046 35' 42" / 120 30' 44"

Sampling: FRM 1/3 & continuous - FEM in 2011

Monitoring objective: Population Exposure MSA: Yakima, WA

Comments

Yakima is a neighborhood scale site impacted by smoke from burning sources in the area. The site is 

equipped with an FRM and suitable for comparison to the PM2.5 NAAQS.
25

Other – Contracted Sites USFS

Table 10: Other Contracted Sites USFS

AQS# Site Name Est. Type Scale Sampling

Type

Design 

Value 2012

Action 

for 2012

530070007 Chelan 2002 SLAMS Neighborhood Continuous N/A Continue

530070010 Leavenworth 2002 SLAMS Neighborhood Continuous 17.2 Continue

530770007 Naches 2008 SLAMS Neighborhood Continuous N/A Continue

530470009 Twisp 2002 SLAMS Neighborhood Continuous 22.7 Continue

530470010 Winthrop 2002 SLAMS Neighborhood Continuous 19.7 Continue 

Additional Monitors: None

Recommendations/Modifications: Continue all listed sites. 

Chelan, Woodin Ave - SLAMS

AQS#530070007- USFS Method code: 771

Address: 428 W. Woodin Avenue, Chelan LAT/LONG: 047 50' 18” / 120 01' 23”

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an urban area

Leavenworth, Evans St. - SLAMS

AQS#530070010- USFS Method code: 771

Address: 330 Evans Street, Leavenworth LAT/LONG: 047 35' 56” / 120 39' 53”

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an urban area

Naches, Hwy 12 - SPMS

AQS#530770007- USFS Method code: 771

Address: 10237 Hwy 12, Naches LAT/LONG: 046 43' 47” / 120 42' 13”

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an urban area

Twisp, Glover St - SLAMS

AQS#530470009- USFS Method code: 771

Address: 118 South Glover Street, Twisp LAT/LONG: 48° 21' 51” / 120 12' 40”

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an urban area

Winthrop, W Chewuch Rd. - SLAMS

AQS#530470010-FS Method code: 771

Address: 24 West Chewuch Road, Winthrop LAT/LONG: 048 28' 38” / 120 11' 26”

Sampling: Continuous

Monitoring objective: Population Exposure MSA: Not in an urban area
26

Other – Contracted Sites Tribal/EPA

Table 11: Other - Contracted Sites Tribal/EPA

AQS# Site Name (Tribe) Est. Type Scale Sampling

Type

Design 

Values 2012

Action 

for 2012

530090014 Neah Bay (Makah) 2008 SLAMS Neighborhood Continuous 8.8 Continue

530270008 Oakville (Chehalis) 2006 SLAMS Neighborhood Continuous 13.6 Continue

530470013 Omak (Colville) 2010 SLAMS Neighborhood Continuous 24.2 Continue

530530022 Puyallup (Puyallup) 2008 SLAMS Neighborhood Continuous 20.1 Continue

530270009 Taholah (Quinault) 2004 SLAMS Neighborhood Continuous 10 TBD*

530770015 Toppenish (Yakama) 2006 SLAMS Neighborhood Continuous 29.3 Continue 

530610011 Tulalip (Tulalip) 2011 SLAMS Neighborhood Continuous *6 mo data Continue

530650002 Wellpinit (Spokane) 2006 SLAMS Neighborhood Continuous 12.6 Continue

530770016 White Swan (Yakama) 2009 SLAMS Neighborhood Continuous ? Continue

Additional Monitors: None

Recommendations/Modifications: *Monitoring was suspended at Taholah in the fall of 2011. EPA is 

working with the Quinault Nation to determine the future of monitoring there. 

Neah Bay, (Makah) - SLAMS

AQS#530090014 Method code: 771

Address: 159 Waada View, Neah Bay LAT/LONG: 048 22' 19” / 124 35' 43”

Sampling: Continuous PM2.5 Monitoring objective: Population Exposure

Oakville, (Chehalis) - SLAMS

AQS#530270008 Method code: 771

Address: 252 Howanut Drive, Oakville LAT/LONG: 046 49' 23” / 123 09' 40" 

Sampling: Continuous PM2.5 & meteorology Monitoring objective: Population Exposure

Omak, Howanut Dr (Colville) - SLAMS

AQS#530470013 Method code: 771

Address: 8th Ave & Omak/Okanogan Rd LAT/LONG: 048. 39’99” / 119 518’' 96” 

Sampling: Continuous PM2.5 & meteorology Monitoring objective: Population Exposure

Puyallup, 66th Ave (Puyallup) - SLAMS

AQS#530530022 Method code: 771

Address: 5722 66th Avenue E. Puyallup LAT/LONG: 047 12' 19” / 122 20' 19”

Sampling: Continuous PM2.5 Monitoring objective: Population Exposure

Taholah, Chitwhin Dr (Quinault) - SLAMS

AQS#530270009 Method code: 771

Address: 600 Chitwin Drive, Taholah LAT/LONG: 047 20' 37” / 124 17' 13”

Sampling: Continuous PM2.5 Monitoring objective: Population Exposure

Toppenish, Ward Rd (Yakama) - SLAMS

AQS#530770015 Method code: 771

Address: 141 Ward Road, Toppenish LAT/LONG: 046 23’ 07” / 120 18' 49”

Sampling: Continuous PM2.5 & meteorology Monitoring objective: Population Exposure
27

Tulalip, Reuben Shelton Dr. (Tulalip) - SLAMS

AQS#530610011 Method code: 771

Address: 3107 Reuben Shelton Dr, Tulalip LAT/LONG: 047 06’90” / 122 27’ 50”

Sampling: Continuous PM2.5 Monitoring objective: Population Exposure

Wellpinit, Ford-Wellpinit Rd (Spokane) - SLAMS

AQS#530650002 Method code: 771

Address: 5298 Ford-Wellpinit Road, Wellpinit LAT/LONG: 047 53' 19” / 117 59' 19”

Sampling: Continuous PM2.5 Monitoring objective: Population Exposure

White Swan (Yakama) - SLAMS

AQS#530770016 Method code: 771

Address: 621 Signal Peak Rd, White Swan LAT/LONG: 046.37’54”/120 72’ 93”

Sampling: Continuous PM2.5 & meteorology Monitoring objective: Population Exposure
28

Other – Contracted Local Air Agencies

Table 12: Other - Contracted Local Air Agencies

AQS# Site Name Est. Type Scale Sampling

Type

DV(2012)

Continuous

Action for 

2012

530570011 Anacortes 2012 SLAMS Urban Continuous NEW Continue

530090013 Cheeka Peak 2006 Rural 

NCore

Regional Continuous 0.055 O3 Continue

530630021 Spokane Augusta 2010 SLAMS Urban Continuous Less than 3yrs 

data

Continue

Additional Monitors: None

Recommendations/Modifications: Note: Ecology provides technical support for Anacortes, Cheeka 

Peak and Spokane Augusta ozone. Technical support can include repair and calibration, quality assurance, 

telemetry and data management.

Anacortes, O Street – SLAMS -NEW

Ozone

AQS # 530570011 Method code: 056

Address: 202 O Street, Anacortes LAT/LONG: 048 52’ 05” / 122 61’ 42” 

Sampling: Continuous

Monitoring objective: Population exposure MSA: Not in an Urban area 

Cheeka Peak (ORCAA) NCore

Nephelometer, ozone, trace gas and meteorological support

AQS#530090013 Method code: 771, 056, 

Address: Cheeka Peak, Clallam County LAT/LONG: 048 17’ 12”/ 124 37' 13” 

Sampling: Continuous

Monitoring objective: Rural NCore MSA: Not in an MSA

Spokane, Augusta - SLAMS 

Ozone

AQS #530630021 Method code: 056

Address: 3104 E. Augusta Ave., Spokane LAT/LONG: 047 39' 39" / 117 21' 26"

Sampling: Continuous 

Monitoring objective: Population Exposure MSA: Spokane, WA
29

Meteorological Monitoring

Table 13: Meteorological Monitoring

AQS# Site Name Est. Type Scale Sampling 

Type

Action 

for 2012

530170006 Burbank 11/05/02 WS, WD, Ta Middle Continuous Relocate

530090013 Cheeka Peak 5/06 WS, WD, Ta Regional Continuous Continue

530650004 Colville 3/11 WS, WD, Ta Neighborhood Continuous Continue

530330023 Enumclaw Mud Mtn. 7/08/98 WS, WD, Ta Urban Continuous Continue

530050005 Kennewick 00/00/12 WS, WD, Ta Middle Continuous Continue

530330017 North Bend 6/1/98 WS, WD, Ta Regional Continuous Continue

530330080 Seattle Beacon Hill 6/4/79 WS, WD, Ta Urban Continuous Continue

530630021 Spokane Augusta Ave. 3/09 WS, WD, Ta Neighborhood Continuous Continue

530531016 Tacoma Tower 1/1/91 WS, WD, Ta Urban Continuous Continue

530110011 Vancouver Blairmount 12/19/07 WS, WD, Ta Neighborhood Continuous Continue

Additional Monitors: None.

Recommendations/Modifications: The former Burbank meteorological site is being moved to the 

Kennewick site. Continue all other listed sites as described. 

Burbank, Maple St – SLAMS – Relocation to Kennewick in 2012 (See below)

AQS#530710006 Method code: 61101, 61102, 621101

Address: 755 Maple Street, Burbank LAT/LONG: 046 12' 00" / 119 00' 30"

Monitoring objective: Population Exposure MSA: Not in an urban area

Cheeka Peak, Rural NCore

AQS #530090013 Method code: 61101, 61102, 621101

Address: Cheeka Peak LAT/LONG: 048 29’ 78”/124 62’ 49”

Monitoring objective: Special Studies MSA: Not in an MSA

Colville – SLAMS 

AQS # 530650004 Method code: 61101, 61102, 621101

Address: 215 S. Oak Street LAT/LONG: 048 32' 41" / 122 54' 13"

Monitoring objective: Population Exposure UA: Not in an urban area

Enumclaw, Mud Mountain Dam - SLAMS

AQS # 530330023 Method code: 61101, 61102, 621101

Address: 30525 SE Mud Mountain Road, Enumclaw LAT/LONG: 047 08' 28" / 121 56' 09"

Monitoring objective: Regional Transport MSA: Seattle-Bellevue-Everett, WA

Kennewick, Metaline Ave - SLAMS

AQS#530050002 Method code: 61101, 61102, 621101

Address: 5929 W Metaline, Kennewick LAT/LONG: 046 13’ 06” / 119 12’ 03”

Monitoring objective: Population Exposure MSA: Richland, Kennewick and Pasco, WA
30

North Bend, North Bend Way - SLAMS 

AQS #530330017 Method code: 61101, 61102, 621101

Address: 42404 SE North Bend Way, North Bend LAT/LONG: 047 29' 23" / 121 46' 24"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Seattle, Beacon Hill - NCore 

AQS # 530330080 Method code: 61101, 61102, 621101

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Spokane, Augusta Ave. - SLAMS 

AQS #530630021 Method code: 61101, 61102, 621101

Address: 3104 E. Augusta Ave., Spokane LAT/LONG: 047 39' 39" / 117 21' 26"

Monitoring objective: Population Exposure MSA: Spokane, WA

Tacoma, Tower Drive - SLAMS 

AQS #530531016 Method code: 61101, 61102, 621101

Address: Tower Drive, Tacoma LAT/LONG: 47.30444”/ 122.4120

Monitoring objective: Population exposure MSA: Seattle-Bellevue, Everett, WA

Vancouver, Blairmount - SLAMS

AQS # 530110011 Method code: 61101, 61102, 621101

Address: 1500 SE Blairmount Drive, Vancouver LAT/LONG: 045 36' 37" / 122 30' 59"

Monitoring objective: Population Exposure MSA: Portland-Vancouver, OR-WA
31

Lead (Pb 11351)

Table 14: Pb Lead 11351

AQS# Site Name Est. Type Scale Sampling

Type

Action 

for 2012

530330080 Seattle, Beacon Hill 2010 NCore Urban 1/6 Continue 

530330029 Auburn, Municipal AF 12/11 Special Studies Urban 1/6 End 2012*

530330029 Auburn, Collocated 12/11 Special Studies Urban 1/12 End 2012*

530610013 Snohomish, Harvey Field 12/11 Special Studies Urban 1/6 End 2012*

Additional Monitors: None.

Recommendations/Modifications: The Auburn Municipal and Harvey Field Airport Pb monitoring are 

scheduled to conclude in December 2012 if no high values are sampled.

Seattle, Beacon Hill - NCore

AQS #530330080 Method code: 085

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Auburn Municipal – Special Studies

AQS #530330029 Method code: 085

Address: 400 23rd St., Auburn LAT/LONG: 047. 32’ 23”/-122 22’ 60”

Monitoring objective: Special Studies MSA: Seattle-Bellevue-Everett, WA

Harvey Field – Special Studies

AQS #530610013 Method code: 085

Address: 9900 Airport Way, Snohomish LAT/LONG: 047. 90’ 23”/-122 10’03”

Monitoring objective: Special Studies MSA: Seattle-Bellevue-Everett, WA
32

Trace Gas Monitoring

NCore – Precursor Gas & Multi-Pollutant Monitoring – From an emission source perspective, 

multiple pollutants and their precursors are released simultaneously (e.g., a combustion plume with 

nitrogen, carbon, hydrocarbon, mercury, sulfur gases, and particulate matter). Meteorological processes 

that shape pollutant movement, atmospheric transformations, and removal act on all pollutants. 

Numerous chemical and physical interactions underlie the dynamics of particle and ozone formation and 

the adherence of air toxics on surfaces of particles. 

Overwhelming programmatic and scientific interactions across pollutants have demanded a movement 

toward integrated air quality management. Multi-pollutant air monitoring benefits health assessments and 

emissions strategy development. Health studies with access to multi-pollutant data will be better 

positioned to identify effects of different pollutants, particularly when concentration, composition, and 

population types are included. Air quality models and source attribution methods used for strategy 

development also benefit from the multi-pollutant approach. Modelers will be able to perform more 

robust evaluations by checking performance on several variables to ensure the model produces results for 

correct reasons and not through compensating errors. As emission sources are characterized by a 

multiplicity of pollutant releases, related source apportionment models yield more conclusive results from 

use of multi-pollutant measurements. Multi-pollutant measurements also streamline monitoring 

operations and offer increased diagnostic capabilities to improve instrument performance. 

The multi-pollutant monitoring provided for these needs by starting to fill the measurement gaps that have 

accumulated over the years. The objective of this strategy is to provide for the following important needs:

• Improved data flow and timely reporting to the public

• Future NAAQS compliance determinations and revisions

• Support for development of emissions strategies

• Assess effectiveness of air pollution control programs

• Data for scientific and health-based studies

Table 15: Trace Gas Monitoring

AQS# Site Name Est. Type Scale Sampling

Type

Action 

for 2012

530330080 Seattle Beacon Hill 4/1997 NCore Urban Continuous Continue

530090013 Cheeka Peak 5/2006 Rural NCore Regional Continuous Continue

Additional Monitors: None

Recommendations/Modifications: Continue listed sites as described. 
33

Table 16: NCore Parameters Seattle Beacon Hill

Parameter Parameter 

Code

Sampling/

Analysis 

Method

Sampling 

schedule 

Spatial 

Scale

Instrument 

Type

Action 

for 2012

Ozone 44201 Continuous Urban API 440 E Continue

SO2 trace 42401 Continuous Urban Thermo 42C Continue

CO trace 42101 Continuous Urban API 300EU Continue

NOy trace 42600 Continuous Urban Thermo 42C-Y Continue

PM2.5 mass 88101 Manual 1/3 Urban R&P 2025 Continue

PM2.5

Continuous

88502 Continuous Urban R&P FDMS 

TEOM 

Continue

PM2.5 Speciation 88502 Continuous 

& Manual

1/3 Urban Met One SSAS & 

URG 3000N 

Carbon , Sunset 

Labs OCEC

Continue

PM10-2.5 86101 Manual 1/3 Urban R&P 2025 Continue

PM10-2.5 

Speciation

Not 

sampling

None TBD

WS & WD 61101/61102 Continuous Urban RM Young 05305 Continue

Ambient 

temperature

62101 Continuous Urban RM Young 

Platinum probe

Continue

Delta 

Temperature

62106 Continuous Urban RM Young Continue

Ambient 

pressure

64101 Continuous Urban RM Young Continue

Relative 

humidity

62201 Continuous Urban Rotronics Continue

Seattle, Beacon Hill - NCore

AQS #530330080

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Special Studies MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle Beacon Hill is an Urban scale site for trace level CO, SO2, NO2, PM2.5, air toxics, speciation and 

other studies. Seattle Beacon Hill also measures PM2.5 chemical speciated particulate matter, volatile 

organic compounds, metals, carbonyls and semi-volatile (PAH). Data from this site supports Particulate 

Research Center activities.
34

Table 17: NCore Parameters Cheeka Peak

Parameter Parameter 

Code

Sampling/

Analysis 

Method

Sampling 

schedule 

Spatial 

Scale

Instrument 

Type

Action 

for 2012

Ozone 44201 Continuous Continuous Rural API T400 Continue

SO2 trace 42401 Continuous Continuous Rural API T100U Continue

CO trace 42101 Continuous Continuous Rural API 300EU Continue

NOy trace 42600 Continuous Continuous Rural API T200U Continue

PM2.5 mass 88101 Manual IMPROVE Rural IMPROVE Continue

PM2.5

Continuous

88502 Continuous Continuous Rural Radiance Research

M903 Nephelometer 

Correlated 

Continue

Light Scatter 11203 Continuous Continuous Rural “ “ Continue

Visibility 63101 Continuous Continuous Rural “ “ Continue

PM2.5

Speciation

88502 Manual IMPROVE Rural IMPROVE Continue

PM10-2.5 IMPROVE Rural IMPROVE Continue

PM10-2.5 

Speciation

IMPROVE Rural IMPROVE Continue

WS, WD & 

sigma

61101/61102

/61106

Continuous Continuous Rural RM Young PSD 

Quality

Continue

Ambient 

temperature

62101 Continuous Continuous Rural RM Young 

Platinum probe

Continue

Ambient 

pressure

64101 Continuous Continuous Rural RM Young Continue

Relative 

humidity

62201 Continuous Continuous Rural Rotronics Continue

Cheeka Peak, Rural NCore

AQS #530090013

Address: Cheeka Peak LAT/LONG: 048 29’ 78”/124 62’ 49”

Monitoring objective: Special Studies MSA: Not in an MSA

Comments

Cheeka Peak is a Regional scale Rural NCore site in Clallam County. Cheeka Peak measures PM2.5, 

ozone, trace level CO, SO2, NO2, PM2.5, and meteorology. 
35

Toxics

Toxics

Collocated National Air Toxics Trend Site (NATTS) - In addition to the STN and NCore Precursor 

Gas Monitoring Programs, Beacon Hill is also a designated National Air Toxics Trend Site (NATTS). 

The primary objectives of Washington’s National Air Toxics Trends Site Monitoring Program include but 

are not limited to:

• Provide long-term air toxic monitoring data in order to establish and track trends.

• Evaluate the air toxic program’s progress by characterizing air toxics concentrations, and 

determining their spatial and temporal differences between cities and regions over time.

• Provide representative air toxic data to support exposure assessments (i.e. determine health 

risks).

• Determine where air toxics emissions come from (source apportionment).

• Provide air toxic data for evaluating modeling results that are used for exposure assessments.

• Assess the effectiveness of the air toxic program’s emission reduction and control strategies.

Table 18: Toxics

AQS# Site Name Est. Type Scale Sampling Type Action for 2012

530330080 Seattle Beacon Hill 4/1997 NCore Urban Manual Continue

Additional Monitors: None

Recommendations/Modifications: Continue listed site as described. 

Seattle, Beacon Hill - NCore

AQS #530330080 Method code: 593/560/574

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Special Studies MSA: Seattle-Bellevue-Everett, WA

Comments

Seattle Beacon Hill is a designated National Air Toxics Trends Site (NATTS). Seattle Beacon Hill 

monitoring station was nominated by the National Air Toxics Committee and chosen by EPA 

headquarters to represent urban scale air toxics in the Pacific Northwest. It is currently the only 

designated urban scale NATTS located in the Pacific Northwest.
36

Speciation

Chemical Speciation Trends Network (CSN) - The PM2.5 Chemical Speciation Program continues to 

have a significant role in the new Monitoring Strategy. Washington’s Speciation Trends Network (STN)

site is located at Jefferson Park on Beacon Hill in Seattle. The primary goal of the PM2.5 speciation 

monitoring is to:

• Provide long-term data in order to establish and track trends

• Determine the spatial and temporal differences of PM2.5 composition between cities and 

regions over time

• Provide representative PM2.5 speciation data to support exposure assessments (i.e. determine 

health risks)

• Determine where PM2.5 emissions come from (source apportionment)

• Evaluate modeling results that are used for exposure assessments

• Assess the effectiveness of the program’s emission reduction and control strategies

Table 19: Speciation

AQS# Site Name Est. Type Scale Sampling

Type

Action 

for 2012

530330080 Seattle Beacon Hill 4/1997 NCore Urban 1/3 Continue

530611007 Marysville 2009 SLAMS Neighborhood 1/6 Continue

530530029 Tacoma L St 2008 SLAMS Neighborhood 1/6 Continue

530110013 Vancouver 2002 SLAMS Neighborhood 1/6 Continue

530770009 Yakima 2002 SLAMs Neighborhood 1/6 Continue 

Additional Monitors: None

Recommendations/Modifications: None

Seattle, Beacon Hill -NCore

AQS #530330080 Method code: 

Address: 4103 Beacon Avenue S., Seattle LAT/LONG: 047 34' 58" / 122 18' 30"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Supplemental Speciation Sites - In addition to the Seattle Beacon Hill speciation trends network site, the 

State operates four supplemental speciation sites. These supplemental sites are located at:

Marysville, 7th Ave – (PSCAA) 

AQS #530611007 Method code: 

Address: 1605 7th ST, Marysville LAT/LONG: 048 03' 18" / 122 10' 33"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA

Tacoma, L Street (PSCAA) 

AQS #530530029 Method code:

Address: 7802 South L St., Tacoma LAT/LONG: 047 11' 11" / 122 27' 06"

Monitoring objective: Population Exposure MSA: Seattle-Bellevue-Everett, WA
37

Vancouver, 4th Plain (SWCAA)

AQS #530110013 Method code: 

Address: 8205 NE 4th Plain Boulevard, Vancouver LAT/LONG: 045 38' 55" / 122 35' 16"

Monitoring objective: Population Exposure MSA: Portland-Vancouver, OR-WA 

Yakima, S 4th (YRCAA)

AQS #530770009 Method code: 

Address: 402 South 4th Avenue, Yakima LAT/LONG: 046 35' 42" / 120 30' 44"

Monitoring objective: Population Exposure MSA: Yakima, WA
38

References

1. Code of Federal Regulations, Title 40, Part 58, Appendix A,B,C,D,E, U.S. Government Printing 

Office, 1999.

2. Code of Federal Regulations, Title 40, Part 50, U.S. Government Printing Office, 1999.

3. Code of Federal Regulations, Title 40, Part 53, U.S. Government Printing Office, 1999.

4. Code of Federal Regulations, Title 40, Part 58, U.S. Government Printing Office, 1999.

5. U.S. EPA Revised Requirements for Designation of Reference and Equivalent Methods for PM2.5

and Ambient Air Quality Surveillance for Particulate Matter -Final Rule. 40 CFR, Parts 53 and 

58. Federal Register, 62(138):38763-38853. July 18, 1997.

6. Guidance for Network Design and Optimum Site Exposure for PM2.5 and PM10, J.G. Watson, et. 

Al., U.S. EPA/OAQPS, December 15, 1997.

7. SLAMS/NAMS/PAMS Network Review Guidance, EPA-454/R-98-003, March 1998.

8. Ambient Monitoring Guidelines for Prevention of Significant Deterioration (PSD), EPA-450/4-

87-007, May 1987.

9. Guideline on Ozone Monitoring Site Selection, EPA-454/R-98-002, August 1998.