SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

ANNUAL AIR QUALITY MONITORING

NETWORK PLAN

July, 2012

Prepared by

Rene M. Bermudez

Acting Atmospheric Measurements Manager
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Table of Contents

Page

Introduction 1

Public Comments 1

Network Design 1

Special Programs 9

Recent or Proposed Modifications to Network 11

Minimum Monitoring Requirements 14

Appendix A: Network Depiction Maps

 Ozone Monitoring Locations A-1

 PM10 Monitoring Locations A-2

 Nitrogen Dioxide Monitoring Locations A-3

 Carbon Monoxide Monitoring Locations A-4

 Sulfur Dioxide Monitoring Locations A-5

 Source and Ambient Lead Monitoring Locations A-6

 PAMS Monitoring Locations A-7

 PM2.5 Monitoring Locations A-8

Appendix B: Detailed Site Information
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INTRODUCTION

An annual review of the Air Quality Monitoring Network is required by Federal Regulations as a 

means to identify and report needs for additions, relocations, or terminations of monitoring sites 

or instrumentation. This report describes the network of ambient air quality monitors in the 

jurisdiction of and operated by the South Coast Air Quality Management District (South Coast 

AQMD). It includes a review of actions taken during the 2011-2012 fiscal year and plans for 

action in the year ahead. This final plan addresses the requirement for an annual network plan as 

listed in Title 40, Part 58, Section 10 of the Code of Federal Regulations (40 CFR § 58.10). 

Regulations require the report be submitted to the U.S. Environmental Protection Agency (EPA) 

by July 1 of each year after a 30 day public comment period.

The South Coast AQMD staff, along with the California Air Resources Board (CARB), 

conducted an extensive review of the air monitoring sites in the South Coast Air Basin (SCAB) 

in late 1980. During the review, State and Local Air Monitoring Stations (SLAMS) 

designations, monitoring objectives, and spatial scales of representativeness were assigned to the 

criteria pollutants monitored at each site. Since that time, the EPA Region IX and CARB staff 

visited selected sites to confirm compliance with applicable siting criteria and related 

requirements. The most recent site visits occurred in 2010 to conduct a comprehensive 

Technical System Audit (TSA) of the ambient air monitoring network. Each year, South Coast 

AQMD staff conducts an annual review of its air monitoring network and submits it to the EPA. 

The review process focuses on current and future network air monitoring strategies and network 

changes are made in consultation with the EPA and CARB. When re-location of monitoring 

sites are required, site reports are updated in the EPA’s Air Quality System (AQS) to document 

compliance with established siting criteria for the new locations.

Public Comments 

Pursuant to Federal regulations, a draft plan is made available for public inspection and 

comments for at least 30 days prior to submission to the EPA. Hard copies of the final document 

are made available on July 1, 2012 at the South Coast AQMD’s Public Information Desk in 

Diamond Bar, CA. The document is also available on the South Coast AQMD website at 

www.aqmd.gov as of July 1, 2012, in the drop down menu under the “Community” and “Air 

Quality” section of the website. The final document is submitted to the EPA on July 1, 2012

along with any public comments received to fulfill Federal regulatory requirements.

Network Design

The South Coast AQMD operates 35 permanent, multi-pollutant monitoring stations, and 5 Lead 

(Pb) air monitoring sites in the SCAB and a portion of the Salton Sea Air Basin in Coachella 

Valley. This area includes Orange County and the non-desert portions of Los Angeles, 

Riverside, and San Bernardino Counties. The newest permanent site was added during June 

2010 to monitor Ozone (O3) and continuous PM2.5 for the Temecula area. The newest source 

Pb sites were added in January 2010 as required by EPA regulation. The Mira Loma High 

School (Jurupa) site was closed in May 2011 and is replaced by the Mira Loma (Van Buren)

location. Table 1 provides a list of monitoring locations, the EPA AQS site codes, and the 

pollutants measured at each site. Table 2 provides the monitoring objective and the spatial scale 

for each monitor at all sites.
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Table 3 describes the monitoring purpose for the monitors at each site. Table 4 describes the 

monitoring objective, purpose, and spatial scale for continuous particulate analyzers at each site. 

A new requirement of the annual network plan implemented in 2007, the monitoring purpose is 

the reason why a certain pollutant is being measured at a certain site. A list and description of 

monitoring purposes are provided below and portions are adapted from the CARB annual 

network plan for 2007. 

Background Level monitoring is used to determine general background levels of air 

pollutants as they enter the SCAB.

High Concentration monitoring is conducted at sites to determine the highest concentration 

of an air pollutant in an area within the monitoring network. A monitoring network may 

have multiple high concentration sites (i.e., due to varying meteorology year to year).

Pollutant Transport is the movement of pollutant between air basins or areas within an air 

basin. Transport monitoring is used to assess and mitigate upwind areas when transported 

pollutant affects neighboring downwind areas. Also, transport monitoring is used to 

determine the extent of regional pollutant transport among populated areas and to rural 

areas.

Population Exposure monitoring is conducted to represent the air pollutant concentrations

that a populated area is exposed to.

Representative Concentration monitoring is conducted to represent the air quality 

concentrations for a pollutant expected to be similar throughout a geographical area. These 

sites do not necessarily indicate the highest concentrations in the area for a particular 

pollutant.

Source Impact monitoring is used to determine the impact of significant sources or source 

categories of air quality emissions on ambient air quality. The air pollutant sources may be 

stationary or mobile.

Trend Analysis monitoring is useful for comparing and analyzing air pollution 

concentrations over time. Usually, trend analyses show the progress or lack of progress in 

improving air quality for an area over a period of many years.

Site Comparison monitoring is used to assess the effect on measured pollutant levels of 

moving a monitoring location a short distance (usually less than two miles). Some 

monitoring stations become no longer usable due to development, change of lease terms, or 

eviction. In these cases, attempts are made to conduct concurrent monitoring at the old and 

new site for a period of at least one year in order to compare pollutant concentrations.

Real Time Reporting/Modeling is used to provide data to EPA’s AIRNOW system which 

reports conditions for air pollutants on a real time basis to the general public. Data is also 

used to provide accurate and timely air quality forecast guidance to residents of the SCAB.
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Multiple purposes for measuring a pollutant at a particular site are possible. There is some 

overlap between monitoring objectives and monitoring purposes as defined by the EPA and 

given in Tables 2, 3, and 4. 

A brief description of the criteria pollutant and program monitoring networks are provided 

below:

OZONE (O3)

The South Coast AQMD operates 30 sites where O3 measurements are made as part of the 

Air Monitoring Network. O3 sites are spread throughout the SCAB with highest 

concentrations measured inland. Figure 1 in Appendix A shows the spatial distribution of 

these sites.

PM10

Size-selective inlet manual high volume samplers are operated at 21 sites to meet the 

requirements for PM10 Federal Reference Method (FRM) sampling. The Indio, Los 

Angeles, Ontario, and Rubidoux sites are designated as collocated sites as shown in the

minimum monitoring requirements and Table 3. All PM10 FRM monitors operate on a 

one day in six day schedule, with the exception of Indio and Rubidoux which operate on 

one day in three day schedule.

PM10 continuous analyzers are operated at 14 sampling sites. These real-time devices are 

capable of making hourly particulate concentration measurements. Table 4 describes the 

monitor type, monitoring objective, purpose, and spatial scale for continuous particulate 

analyzers at each site. Figure 2 in Appendix A shows the spatial distribution of the 

sampling sites. Real-time monitors, for the most part, are clustered in the high 

concentration areas, with two located in the desert area where wind-blown crustal material 

has caused exceedences of the twenty-four hour standard during exceptional events. In 

downwind areas of the SCAB, a large fraction of particulate is formed in the atmosphere; 

PM10 reaches maximum levels during late summer through early winter months. 

Where both size-selective inlet manual high volume samplers and PM10 continuous 

analyzers are deployed together they are sited as collocated for data comparison purposes. 

The PM10 manual high volume sampler remains the primary analyzer used for attainment 

purposes and continuous analyzers are designated as audit samplers.

NITROGEN DIOXIDE (NO2)

The NO2 network consists of 25 sites. These sites are mostly located in areas of highest 

NO2 concentration. The spatial distribution of NO2 monitors is shown in Figure 3 in 

Appendix A. Review of 1992 through 2011 data indicates that State and Federal standards

for NO2 were not exceeded.

CARBON MONOXIDE (CO)

Ambient CO monitors measure concentrations at 25 locations. Figure 4 in Appendix A

shows the spatial distribution of these sites. CO emissions, primarily from motor vehicles, 
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show a pattern consistent with major freeway arteries. A review of data for 2011 indicates 

State and Federal standards for CO were not exceeded.

SULFUR DIOXIDE (SO2)

SO2 monitors are located at 7 sites. Figure 5 in Appendix A shows the spatial distribution 

of the sites. Most SO2 emissions come from Federal transportation sources such as marine 

vessels. The monitors are clustered mostly in the areas where these sources are located. 

On June 22, 2010 EPA strengthened the SO2 National Ambient Air Quality Standard 

(NAAQS). Network design requirements included new minimum requirements be 

determined by the Population Weighted Emissions Index (PWEI).

The PWEI shall be calculated by States for each Core Based Statistical Area 

(CBSA) they contain or share with another State or States for use in the 

implementation of or adjustment to the SO2 monitoring network. The PWEI shall 

be calculated by multiplying the population of each CBSA, using the most current 

census data or estimates, and the total amount of SO2 in tons per year emitted 

within the CBSA area, using an aggregate of the most recent county level 

emissions data available in the National Emissions Inventory (NEI) for each 

county in each CBSA. The resulting product shall be divided by one million, 

providing a PWEI value, the units of which are million persons-tons per year. For 

any CBSA with a calculated PWEI value equal to or greater than 1,000,000, a 

minimum of three SO2 monitors are required within that CBSA. For any CBSA 

with a calculated PWEI value equal to or greater than 100,000, but less than 

1,000,000, a minimum of two SO2 monitors are required within that CBSA. For 

any CBSA with a calculated PWEI value equal to or greater than 5,000, but less 

than 100,000, a minimum of one SO2 monitor is required within that CBSA.

CBSA Population Estimate NEI SO2 Emmissions PWEI Value Minimum Required SO2 

31100 12,874,797 5,695 73,327 1

40140 4,143,113 1,613 6,683 1

South Coast AQMD exceeds the minimum requirement for SO2 monitors; the Federal 

standard has not been exceeded for nearly 32 years.

PARTICULATE LEAD

Total Suspected Particulate (TSP) Pb measurements are collected at 15 sites as part of the 

network; 5 of the sites are Source Impact for Pb, and the remaining 10 sites measure 

ambient Pb, and Sulfates (SO4). There are 4 additional sites which measure SO4 only for a 

total of 19 TSP particulate sites. The Vernon (Rehrig), Long Beach, Los Angeles, and 

Riverside sites are designated as collocated sites as shown in the minimum monitoring 

requirements and Table 3. The spatial distribution of these sites is shown in Figure 6 in 

Appendix A.

In 1990, the EPA requested that the South Coast AQMD collect ambient air particulate 

samples near several large Pb handling (battery recycling) facilities. Long-term source 

impacted monitoring began in 1991. A facility in the City of Industry exceeded the Federal 
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ambient particulate Pb standard during the second quarter of Fiscal Year 1991-92. Pb

monitoring at a facility in the City of Torrance ended in 1993 when measurements were 

consistently below the ambient standard. Sampling ended at a facility in the City of 

Commerce in 2006 when the business was closed. Out of the two facilities currently being 

monitored, the facility in the City of Vernon exceeded the old Federal ambient particulate 

Pb standard (1.5 ug/m3 quarterly) during the first quarter of 2008; the other facility was 

found to remain below this level. These source-related Pb sites are also depicted in 

Figure 6.

On November 12, 2008, the EPA issued final revisions to the NAAQS for Pb. Network 

design requirements included monitoring for sources of Pb (source oriented monitoring) 

and urban Pb monitoring (non-source oriented). To meet this requirement, a source 

oriented site was established on January 1, 2010 at the Van Nuys Airport and monitoring 

will continue at the sites surrounding the Exide (Vernon), Quemetco (Industry), and the

Trojan Battery facilities. Existing urban Pb monitoring conducted at Compton, LAX 

Hastings, Long Beach (North), Los Angeles (Main), Pico Rivera, Riverside Magnolia, 

Rubidoux, San Bernardino, South Long Beach, and Upland exceed the minimum 

monitoring requirements.

The final rule for Pb went into effect on January 26, 2011. In the final rule the Van Nuys 

Airport was no longer included on the list of airports where lead monitoring was required, 

and a more recent emissions inventory showed lead emissions less than 1 ton per year. 

The data from the Van Nuys Airport Pb site is currently under review to determine the 

need for continued monitoring.

Photochemical Assessment Monitoring Stations

The Photochemical Assessment Monitoring Stations (PAMS) network was initiated in 

June 1994 at Pico Rivera and Upland. During 1995 sites were established at Banning and 

Azusa to determine speciated hydrocarbon O3 precursor compounds in ambient air. 

PAMS monitoring at Hawthorne commenced in June 1997 and the Burbank station 

became a PAMS site in July 1997. In May 2001, the Santa Clarita location was 

established as a PAMS site. In April 2004, the Hawthorne site was replaced by LAX 

Hastings, due to the end of a property lease. In August 2005, the Pico Rivera station 

moved to a new location one half mile south of the previous site, also due to the end of the 

property lease.

On October 17, 2006, the EPA issued final amendments to PAMS monitoring 

requirements in 40 CFR § 58. The changes made to the rule were to implement 

recommendations made by the PAMS workgroup formed to assess the program. The 

workgroup recommended changes be made to site type and monitoring objectives. During 

September 2008, a report from the EPA PAMS network assessment project workgroup was 

issued. The objectives of the workgroup were to assess how well the current PAMS 

network was meeting monitoring objectives, determine which sites are most useful for 

meeting objectives, identify potentially redundant, ineffective, or unnecessary sites, and to 

assess other enhanced O3 monitoring activities that may prove useful.
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To address regulatory changes, site-specific observations from the PAMS network 

assessment project, and potential synergies between programs, South Coast AQMD made 

the following changes in June 2009 to the PAMS monitoring network:

 Burbank was reclassified from Type 2/1 to Type 2. This change addressed the 

National PAMS Network Assessment observation that Burbank should be reclassified 

to a Type 2 precursor site. The recommendation is consistent with the heavily 

urbanized/industrialized area, which is impacted by high levels of O3 precursor 

emissions. 

 Santa Clarita was reclassified as Type 3 from Type 2. Although the National PAMS 

Network Assessment observed that Santa Clarita was consistent with a Type 2 site, 

recent data was more consistent with a Type 3 maximum O3 concentration site rather 

than a Type 2 O3 precursor site.

 Banning was relocated to Los Angeles (Main). The National PAMS Network 

Assessment observed that Banning had the lowest O3 concentrations of all the Type 2 

sites and should be reclassified to a Type 3 or 4 site. Instead, to create synergies 

between programs, South Coast AQMD relocated the Banning PAMS site to the Los 

Angeles (Main) site as Type 2. This satisfies the EPA recommendation for use of the 

same monitoring platform and equipment to meet the objectives of multiple 

programs. Los Angeles (Main) is also a National Air Toxics Trends Station 

(NATTS), a National Core-Multi-pollutant Monitoring Station (NCore), and a 

Speciation Trends Network (STN) site.

 Azusa was reclassified from Type 3 to Type 2. This proposed change addresses the 

National PAMS Network Assessment observation that Azusa has high Volatile 

Organic Compounds (VOC) and Oxides of Nitrogen (NOX) concentrations, with 

lower O3 concentrations. The site now more closely resembles a Type 2 O3 

precursor site.

 Upland was relocated to the Rubidoux site. The National PAMS Network 

Assessment observed that Upland was no longer consistent with a Type 4 site and 

recommended reclassification to Type 3. South Coast AQMD relocated the Upland 

PAMS site to Rubidoux as a Type 3 location where synergies can be created among 

the NATTS, NCore, and the STN programs.

 LAX Hastings and Pico Rivera remained unchanged.

Currently, manual VOC canisters are in operation at the Azusa, LAX Hastings, Rubidoux, 

Los Angeles (Main), and Santa Clarita air monitoring stations. During the intensive season 

from July 1 until September 30, VOC canisters are run every three hours for a period of 

twenty-four hours every 3rd day and a twenty-four hour sample is run every 6th day. 

During the non-intensive season from October 1 through June 30, twenty-four hour VOC 

canister samples are run every 6th day.

At Los Angeles (Main) and Santa Clarita air monitoring stations, during the intensive 

season from July 1 until September 30, carbonyl samples are run every three hours for a 

period of twenty-four hours every 3rd day and a twenty-four hour sample is run every 6th 

day. During the non-intensive season from October 1 through June 30, twenty-four hour 

carbonyl samples are run every 6th day.
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Automated Gas Chromatography Flame Ionization Detector (GC\FID) VOC systems are in 

operation at the Pico Rivera and Burbank air monitoring stations. During the intensive 

sampling season from July 1 until September 30, the GC\FID is run to collect daily 3-hour 

samples and twenty-four hour VOC canisters are run every 6th day. Like the other PAMS 

sites, carbonyl samples are run every three hours with one additional twenty-four hour 

sample run every 6th day. During the non-intensive season from October 1 through June 

30, the GC/FID is idle and twenty-four hour VOC canister samples are run every 6th day 

and twenty-four hour carbonyl samples are run every 6th day. Rubidoux is a collocated 

site for VOC canister sampling and Pico Rivera is a collocated site for VOC canister and 

carbonyl sampling. 

During April 2010, a system audit was conducted by the EPA, which assessed the South 

Coast AQMD NATTS/PAMS programs. The audit found no major issues with the 

operation of the network but recommended implementation of blanking and low level 

concentration challenge samples for the NATTS and PAMS programs. Blanking was 

implemented in June, 2010 and low level challenge samples were implemented during 

October, 2010.

The first South Coast AQMD upper air meteorological monitoring station was established 

at Los Angeles International Airport (LAX) in 1994. Subsequent upper air stations include 

Ontario International Airport (ONT) installed in 1996, Moreno Valley (MOV) installed in 

2001 at the Moreno Valley Municipal Water Treatment Plant in Riverside County, Irvine 

installed at the University of California Research and Extension Center in 2006, and 

Pacoima at Whiteman Airport during May 2007. The upper air stations use a combination 

of remote sensing and surface meteorological instrumentation, including the Vaisala 

(formerly Radian/URS) LAP-3000 radar wind profiler with a Radio Acoustic Sounding 

System (RASS), the Atmospheric Systems Corporation (formerly AeroVironment Inc.) 

mini Sodar acoustic wind profiler, and tower-mounted meteorological measurements of 

wind, pressure, temperature, relative humidity, solar radiation, and ultraviolet radiation.

The PAMS network monitoring objectives and requirements are summarized in Table 6 

and Figure 7 in Appendix A shows the distribution of the PAMS network.

PM2.5

A network of 17 FRM samplers was first implemented in January 1999. On December 26, 

1999, a second Coachella Valley PM2.5 sampling site was established in Palm Springs. 

On June 20, 2003, PM2.5 sampling began at the South Long Beach site. The final addition 

to the PM2.5 FRM network occurred in October 2005, at the new Mira Loma site. This 

brings the total number of PM2.5 FRM sampling sites to 20. The sites are depicted in 

Figure 8, Appendix A and the starting date of each sampler is listed in Table 5. In March

2012, a change was made relocating the collocated PM2.5 monitor from Indio to the Mira 

Loma (Van Buren) site. This change was made following approval from EPA. Collocated 

sampling sites include Rubidoux, Central Los Angeles, and Mira Loma (Van Buren). All 

sites in the Network using FRM samplers are suitable for comparison against the annual 

PM2.5 NAAQS.
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During April 2009, South Coast AQMD completed minor changes to the FRM monitoring 

schedule to enhance Federal Equivalent Method (FEM) Beta Attenuation Monitor (BAM)

comparisons. On April, 16th, 2009 the Burbank and Mira Loma (Van Buren) FRM 

samplers changed to daily sampling from the current 1-in-3 day schedule and the Azusa 

location changed from every day sampling to 1-in-3 day sampling. Federal minimum 

monitoring requirements for PM2.5 are still being met and/or exceeded.

Continuous PM2.5 Met One BAMs were first deployed in fiscal year 2001–02. Seventeen

monitors are now operating in the SCAB, two at Rubidoux (collocated), and one each at 

Anaheim, Los Angeles, South Long Beach, Burbank, Mira Loma (Van Buren), and 

Banning. In January 2006, two additional samplers were added at Lake Elsinore and 

Glendora as part of the Children’s Health Study. As proposed in the 2008 network plan, 

FEM BAM monitors were deployed during October 2008, at the Anaheim, Burbank, Long 

Beach (North), Los Angeles (Main), Mira Loma (Van Buren), Rubidoux, and South Long 

Beach sites. Relocated NON-FEM BAM samplers were installed at Reseda, Riverside 

Magnolia, Santa Clarita, Crestline, and Upland. A NON-FEM BAM was collocated with a 

FEM BAM at Rubidoux. An additional BAM sampler was deployed at Temecula during 

July, 2010. In 2011, all FEM BAMs with the exception of Temecula have been 

reclassified from special purpose monitors to SLAMS under 40 CFR § 58.20.

Where both 24 hour FRM PM2.5 samplers and FEM PM2.5 continuous analyzers are 

deployed together, they are sited as collocated for data comparison purposes. The 24 hour 

FRM PM2.5 sampler remains the primary analyzer used for attainment purposes and 

continuous analyzers are designated as audit samplers.

PM2.5 speciation sampling is also a part of the South Coast AQMD PM2.5 program. 

Collocated STN and one South Coast AQMD Met One SASS PM2.5 samplers were 

deployed in March 2001 at Rubidoux. An additional STN and collocated South Coast 

AQMD SASS samplers were deployed at Central Los Angeles in 2002. In 2003, SASS 

PM2.5 speciation samplers were installed at Fontana and Anaheim air monitoring sites. 

Analysis of the filters from the ambient network SASS samplers are being conducted at 

South Coast AQMD’s laboratory. The STN filters are shipped to Research Triangle 

Institute (RTI) for analysis. This approach has the concurrence of CARB and EPA, 

Region IX.

National Air Toxics Trends Station

The NATTS program was developed to fulfill the need for long-term Hazardous Air 

Pollutant (HAP) monitoring data of consistent quality nationwide. South Coast AQMD 

has conducted several air toxics measurement campaigns in the past, which demonstrated 

the variety and spatial distribution of air toxics sources across SCAB. A single air toxics 

measurement site cannot reflect the levels and trends of air toxics throughout the SCAB. 

For this reason, two NATTS sites are used to characterize the SCAB’s air toxics levels. 

The first site is a central urban core site in Los Angeles that reflects concentrations and 

trends due primarily to urban mobile source emissions. A second, more rural, inland site at 

Rubidoux captures the transport of pollutants from a variety of upwind mobile and 
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industrial sources in the most populated areas of the air basin. NATTS monitoring began 

in February 2007 and continues at the Los Angeles (Main) and Rubidoux air monitoring 

sites. During April 2010, a system audit was conducted by the EPA, which assessed the 

South Coast AQMD NATTS program. The audit found no major issues with the operation 

of the network but recommended implementation of blanking and low level concentration 

challenge samples for the NATTS and PAMS programs. Blanking was implemented in 

June, 2010 and low level challenge samples were implemented during October, 2010.

NCore

NCore monitoring rules require that South Coast AQMD make NCore sites operational by 

January 1st, 2011. To meet this goal, South Coast AQMD installed trace level analyzers 

for CO, NOY and SO2 at the Rubidoux and Central Los Angeles sites. Final calibrations 

were completed at the Rubidoux site January, 2011 and at the Central Los Angeles during 

May, 2011. Both the Los Angeles and Rubidoux sites are NATTS and PAMS monitoring 

locations.

Special Programs

Special monitoring programs are conducted for rule compliance purposes, to characterize the 

levels of toxic air contaminants and other criteria pollutants in sub-regional areas or communities 

in the SCAB, or to support modeling and planning efforts. The following is a list of special 

monitoring programs that were active during the past year. Note that this is being provided for 

informational purposes only. 

MATES IV

The SCAB, a highly urbanized area, is home to about sixteen million people who own and 

operate about eleven million motor vehicles and contains some of the highest 

concentrations of industrial and commercial operations in the country. It also has the 

poorest air quality in the U.S. In 1986, South Coast AQMD conducted the first MATES 

study to determine the SCAB-wide risks associated with major airborne carcinogens. At 

the time the state of technology was such that only ten known air toxic compounds could 

be analyzed. In 1998, a second MATES study (MATES II) represented one of the most 

comprehensive air toxics measurement programs conducted in an urban environment. 

MATES II included a monitoring program of 40 known air toxic compounds, an updated 

emissions inventory of toxic air contaminants, and a modeling effort to characterize health 

risks from hazardous air pollutants. In April 2004, the South Coast AQMD initiated the 

third round of MATES (MATES III) to assess the ambient levels of airborne compounds 

linked to adverse health effects in humans. In June, 2012 South Coast AQMD will begin 

MATES IV.

The objective of MATES IV is to characterize the ambient air toxic concentrations and 

potential exposures in the SCAB. This project includes one year of ambient monitoring for 

air toxics which will have a combination of SCAB-wide measurements and localized 

studies. The project will develop an updated toxics emissions inventory and conduct air 

dispersion modeling to estimate ambient levels and the potential health risks of air toxics. 
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The results of this effort will determine the spatial concentration pattern of important 

hazardous air pollutants in the SCAB, will assess the effectiveness of current air toxic 

control measures, provide trend data of air toxic levels, and be used to update and develop 

appropriate control strategies for reducing exposures to toxics associated with significant 

public health risks.

MATES IV proposes to enhance the spatial resolution of previous studies by 

characterizing the ambient concentration of selected toxic air compounds in communities 

with varying land-type usage, such as residential, industrial, and commercial, as well as 

gradients from source areas downwind to receptor areas. 

MATES IV monitoring sites will utilize MATES III sites for trend analysis. There are ten

fixed sites operating on a one-in-six day schedule for twenty-four hours. Monitoring 

locations include the Anaheim, Burbank, Compton, Fontana, Huntington Park, North Long 

Beach, LA Main Street, Pico Rivera, Rubidoux, and West Long Beach areas. MATES IV 

will add Ultra Fine Particulate (UFP) and Black Carbon (BC) continuous measurements. 

Mobile monitoring platforms are to be deployed for short term deployments at six to eight 

sites to include communities with varying land type usage. 

Fugitive Dust Study

In support of South Coast AQMD Rule 403 - Fugitive Dust, SSI PM10 samplers are 

deployed on an episodic basis upwind and downwind of potential sources as required 

under Rule 403. Since 2003, periodic sampling has been conducted around gravel quarries 

and other industries which seem to be producing large volumes of dust. 

Hexavalent Chrome 

The South Coast AQMD has an ongoing program of collecting ambient hexavalent 

chromium in the vicinity of several chrome plating and cement production facilities located

throughout the SCAB. Monitoring continues at Newport Beach, Riverside, and other 

locations throughout the South Coast AQMD jurisdiction.

College of the Desert

Because exceedances of the standard PM10 have been recorded at the Torres-Martinez 

(Indian Reservation) station, South Coast AQMD is conducting an independent monitoring 

study to evaluate the spatial representativeness of such measurements. A continuous PM10 

monitor was set-up near “College of the Desert” on 12/07/10 where measurements 

continue to be taken.

Recent or Proposed Modifications to Network

Near Roadway NO2 Monitoring

On February 9, 2010, U.S. EPA promulgated new minimum monitoring requirements for

the NO2 monitoring network in support of newly revised 1-hour NO2 NAAQS and the 

retained annual NAAQS. In the new monitoring requirements, State and Local air 

monitoring agencies are required to install near-road NO2 monitoring stations at locations 

where peak hourly NO2 concentrations are expected to occur within the near-road 
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environment in larger urban areas. State and local air agencies are required to consider 

traffic volumes, fleet mix, roadway design, traffic congestion patterns, local terrain or 

topography, and meteorology in determining where a required near-road NO2 monitor 

should be placed. In addition to those required considerations, there are other factors that 

impact the selection and implementation of a near-road monitoring station including 

satisfying siting criteria, site logistics (e.g., gaining access to property and safety), and 

population exposure. 

The near roadway grant guidance directed implementation of near road sites be conducted 

in phases. Phase I sites include one site in the Los Angeles – Long Beach – Santa Ana 

(Metropolitan Statistical Area (MSA) and one in the Riverside – San Bernardino – Ontario 

MSA. These sites are to be established and operating by January 1, 2013. The current 

funding level is intended to cover the costs of these two sites. EPA will announce a

schedule for additional implementation at a later date as funding becomes available. 

The primary objective of the near-road NO2 network is to place monitoring resources on 

near-road locations where peak, ambient NO2 concentrations are expected to occur as a 

result of on-road mobile source emissions. Monitoring at such a location or locations 

within a particular urban area will provide data that can be used for comparison to the 

NAAQS and to assess population exposures for those who live, work, play, go to school, 

or commute within the near-roadway environment. The near-road NO2 data will provide a 

clear means to determine whether or not the NAAQS is being met within the near-road 

environment throughout a particular urban area. Since near-road NO2 monitoring sites are 

to be placed at locations with expected peak NO2 concentrations, and the target mobile 

sources and the roads they travel upon are ubiquitous throughout urban areas, these 

monitoring data may be said to represent the relative worst case population exposures that 

may be occurring in the near-road environment throughout an urban area over the 

averaging times of interest.

Following the guidance of the U.S. EPA draft Near Roadway NO2 Technical Assistance 

Document (TAD) (December, 2011), identification of potential monitoring sites is 

completed by assessment of six factors including: Annual Average Daily Traffic (AADT), 

fleet mix, congestion patterns, roadway design, terrain, and meteorology. In addition, 

South Coast AQMD has locally available data to assist in prediction of near-road NO2

maximum concentrations expected. The identified locations are to be surveyed for site 

feasibility. Considerations include availability of location and lease, access to utilities, 

securing permits, and potential safety issues. Based on this guidance South Coast AQMD 

had identified and begun the process to evaluate and secure potential monitoring locations. 

Areas which have been identified in the Los Angeles – Long Beach – Santa Ana MSA 

include the 605/I-5 freeway interchange, 57/I-5/22 freeway interchange and the 57/60 

freeway interchange. Areas identified in the Riverside – San Bernardino – Ontario MSA 

include the 60 Freeway at Euclid, 60/I-15 freeway interchange and the I-10/I-15 freeway 

interchange. Table 7 shows AADT and Fleet Equivalent (FE) values as determined by 

TAD guidance.
Air Quality Monitoring Network Plan – July 2012

12

Once monitoring begins, the continuous operation of instrumentation and meteorological 

data will be ongoing with data reported to AQS and AIR/NOW.

Indio PM2.5 Collocation

On March 8, 2012 after consultation with EPA the collocated PM2.5 monitor was moved 

from the Indio air monitoring site to the Mira Loma (Van Buren) site. The Mira Loma 

(Van Buren) site is the PM2.5 design site for the South Coast AQMD. The monitor was 

moved to assure the consistency of the data at the Mira Loma site and to serve as a backup 

monitor in case of primary instrument failure.

Van Nuys Pb Monitoring Site

On November 12, 2008, the EPA issued final revisions to the NAAQS for Pb. Network 

design requirements included monitoring for sources of Pb (source oriented monitoring) 

and urban Pb monitoring (non-source oriented). To meet this requirement, a source 

oriented site was established on January 1, 2010 at the Van Nuys Airport. The final rule 

for Pb went into effect on January 26, 2011. In the final rule the Van Nuys Airport was no 

longer included on the list of airports where lead monitoring was required, and a more 

recent emissions inventory showed lead emissions less than 1 ton per year. The data from 

the Van Nuys Airport Pb site is currently under review to determine the need for continued 

monitoring. Changes to the Pb monitoring network will be made upon after consultation 

with EPA.

Sulfate Monitoring

South Coast AQMD has been monitoring TSP sulfate data at the Banning, Fontana, 

Pasadena, and West Los Angeles monitoring since the inception of the monitoring sites. In 

2003, ARB revised the sulfates monitoring method and standard by deleting the TSP

sulfates method, ARB method MLD 033, and replaced it with the existing ARB method 

and creating a new standard for PM10 sulfates, ARB method MLD 007. ARB conducted a 

comparison of South Coast AQMD PM10 and TSP sulfate data for 1999 though 2010 and 

found good correlation between the two methods. TSP sulfate data is currently being 

reviewed in consultation with EPA and ARB to determine the need for continued TSP 

sulfate monitoring.

La Habra

South Coast AQMD has been operating the La Habra site since 1960. The deteriorating 

state of the shelter along with compromises made to the siting criteria due to obstructions 

has made it a candidate for site improvement. As part of regular air monitoring station 

maintenance, the station shelter was replaced in FY 2011-12.

Pasadena

South Coast AQMD has been operating the Pasadena site since 1982. The deteriorating 

state of the shelter along with compromises made to the siting criteria due to obstructions 

has made it a candidate for site improvement. As part of regular air monitoring station 

maintenance, a new station shelter as been modified to replace the existing trailer during 

FY 2012-13.
Air Quality Monitoring Network Plan – July 2012

13

Crestline

South Coast AQMD has been operating the Crestline site since 1973. The deteriorating 

state of the shelter along with compromises made to the siting criteria due to obstructions 

has made it a candidate for site improvement. As part of regular air monitoring station 

maintenance, a new station shelter as been ordered to replace the existing trailer during FY 

2012-13.

South Long Beach

South Coast AQMD has been operating the South Long Beach station as part of the 

ambient air-monitoring network. Recent construction of the buildings adjacent to our air 

monitoring equipment compromises the siting criteria. During the FY 2012-13 a data 

comparison between a more centralized monitoring location in Long Beach will be 

undertaken. If comparison of data between the two locations demonstrates some 

comparability, or if the metropolitan site shows consistently higher levels of PM, the South 

Long Beach site may be relocated after consultation with EPA.

Air Monitoring Station Improvements

As part of the actions to enhance quality of data collected, South Coast AQMD will 

replace existing deteriorated shelters at the Indio, San Bernardino, West Los Angeles and 

Perris monitoring sites. The new shelters will be installed at the same locations as the 

existing structures.

Minimum Monitoring Requirements

The South Coast AQMD jurisdictional boundary encompasses two MSAs and two CBSAs 

whose boundaries and codes mirror those of the MSAs as defined by the U.S. Office of 

Management and Budget. The Los Angeles-Long Beach-Santa Ana MSA\CBSA (Code 31100) 

had a population of 12,874,797 based on 2009 U.S. Census Estimates. The Riverside-San 

Bernardino-Ontario MSA\CBSA (Code 40140) had a population of 4,224,851 based on 2009 

estimates. The minimum number of monitors for each pollutant is based on MSA population as 

described in 40 CFR § 58 Appendix D. The South Coast AQMD is a Primary Quality Assurance 

Organization (PQAO) and the network exceeds the minimum monitoring requirements for all 

criteria pollutants. Details are provided below.

O3

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

31100

(3 Year design > 85%)

4 17

40140

(3 Year design > 85%)

3 13
Air Quality Monitoring Network Plan – July 2012

14

PM10

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

Min # 

Collocated 

Required

# 

Collocated 

Active

31100 

(Medium Concentration) 4-8 9 1 1

40140

(High Concentration) 6-10 12 2 3

NO2

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

31100 0 17

40140 0 8

CO

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

31100 0 17

40140 0 8

SO2

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

31100 1 5

40140 1 2

Pb

MSA Minimum # of 

Monitors Required # of Monitors Active

Source 

Impact

Urban 

Monitoring

Source 

Impact

Urban 

Monitoring

31100 1 1 5 6

40140 0 1 0 4
Air Quality Monitoring Network Plan – July 2012

15

Pb (cont)

Minimum # of Collocated 

Required # of Collocated Monitors Active

Source Impact Urban Monitoring Source Impact Urban Monitoring

1 1 1 2

0 1 0 1

Minimum PAMS Monitoring 

South Coast AQMD 

Monitoring Area

Min. # 

Monitors Sites 

Required

# Monitoring 

Sites Active

Type 1 or 3 1 3

Type 2 1 4

Type 4 0 0

Upper Air Meteorology 1 5

PM2.5 24 hr Manual

Primary Quality 

Assurance 

Organization 

(PQAO)

Min. # 

Monitors 

Required

# 

Monitors 

Active

Min # 

Collocated 

Required

# 

Collocated 

Active

South Coast AQMD

(Design Value > 85%) 6 20 3 3

PM2.5 Continuous

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

Min # 

Collocated 

Required

# 

Collocated 

Active

Total # 

Continuous

Analyzers

FEM Non 

FEM FEM1 Non 

FEM2 FEM Non 

FEM

31100

(Design Value > 85%) 2 5 3 0 0 0 0

40140

(Design Value > 85%) 2 2 7 0 0 0 1

1 Designated as audit sampler

2 One of the required continuous monitors is itself a FEM monitor, no collocation requirement applies.
Air Quality Monitoring Network Plan – July 2012

16

PM2.5 Speciated

MSA Min. # 

Monitors 

Required

# 

Monitors 

Active

Min # 

Collocated 

Required

# 

Collocated 

Active

31100 1 2 1 1

40140 1 2 1 1
Air Quality Monitoring Network Plan – July 2012

17

TABLE 1. List of Monitoring Sites

Location AQS No. Pollutants Monitored Start 

Date

1 Anaheim 060590007 CO,NO2,O3,PM10,PM2.5 08/01

2 ATSF (Exide) 060371406 Pb 01/99

3 Azusa 060370002 CO,NO2,O3,PM10,PM2.5,SO4 01/57

4 Banning Airport 060650012 NO2,O3,PM10, PM2.5 04/97

5 Big Bear 060718001 PM2.5 02/99

6 Burbank 060371002 CO,NO2,SO2,O3,PM10,PM2.5 10/61

7 Closet World (Quemetco) 060371404 Pb 10/08

8 Compton 060371302 CO,NO2,O3,Pb,PM2.5 01/04

9 Costa Mesa 060591003 CO,NO2,SO2,O3 11/89

10 Crestline 060710005 O3,PM10 10/73

11 Fontana 060712002 CO,NO2,SO2,O3,PM10,PM2.5,SO4 08/81

12 Glendora 060370016 CO,NO2,O3,PM2.5,PM10 08/80

13 Indio 060652002 O3,PM10,PM2.5 01/83

14 La Habra 060595001 CO,NO2,O3 08/60

15 Lake Elsinore 060659001 CO,NO2,O3,PM2.5,PM10 06/87

16 LAX Hastings 060375005 CO,NO2,O3,PM10,Pb,SO4 04/04

17 Long Beach (North) 060374002 CO,NO2,SO2,O3,PM10,PM2.5,Pb,SO4 10/62

18 Los Angeles (Main St.) 060371103 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO4 09/79

19 Mira Loma (Van Buren) 060658005 CO,NO2,O3,PM10,PM2.5 11/05

20 Mission Viejo 060592022 CO,O3,PM10,PM2.5 06/99

21 Norco 060650003 PM10 12/80

22 Ontario Fire Station 060710025 PM10,PM2.5 01/99

23 Palm Springs 060655001 CO,NO2,O3,PM10,PM2.5 04/71

24 Pasadena 060372005 CO,NO2,O3,PM2.5,SO4 04/82

25 Perris 060656001 O3,PM10 05/73

26 Pico Rivera #2 060371602 CO,NO2,O3,Pb,PM2.5,SO4,PM10 09/05

27 Pomona 060371701 CO,NO2,O3 06/65

28 Redlands 060714003 O3,PM10 09/86

29 Rehrig (Exide) 060371405 Pb 11/07

30 Reseda 060371201 CO,NO2,O3,PM2.5 03/65

31 Riverside (Magnolia) 060651003 CO,NO2,Pb,PM10,PM2.5,SO4 10/72

32 Rubidoux 060658001 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO4 09/72

33 San Bernardino 060719004 CO,NO2,O3,PM10,Pb,PM2.5 05/86

34 Santa Clarita 060376012 CO,NO2,O3,PM10,PM2.5 05/01

35 South Long Beach 060374004 PM10,Pb,PM2.5,SO4 06/03

36 Temecula 060650016 O3, PM2.5 06/10

37 Uddelholm (Trojan 

Battery) 060371403 Pb 11/92

38 Upland 060711004 CO,NO2,O3,Pb,PM2.5,PM10,SO4 03/73

39 Van Nuys Airport 060371402 Pb 01/10

40 West Los Angeles 060370113 CO,NO2,O3,SO4 05/84

1

 
Air Quality Monitoring Network Plan – July 2012

18

TABLE 2. FRM/FEM Criteria Pollutant Monitoring Objective and Spatial Scales

MONITORING OBJECTIVE SPATIAL SCALE

HC – High Concentration MI – Microscale

RC – Representative Concentration MS – Middle Scale

IM – Impact NS – Neighborhood Scale

BK – Background US – Urban Scale

Location CO NO2 SO2 O3 Manual 

PM10

Manual 

PM2.5

Pb

Anaheim NS/RC US/RC NS/RC NS/RC NS/RC

ATSF (Exide) MI/IM

Azusa NS/RC US/RC US/HC NS/RC NS/RC

Banning Airport NS/RC NS/RC NS/RC

Big Bear NS/RC

Burbank NS/HC NS/RC NS/RC US/HC NS/RC NS/RC

Closet World (Quemetco) MI/IM

Compton MS/HC MS/RC NS/RC NS/RC NS/RC

Costa Mesa NS/RC NS/RC NS/RC NS/RC

Crestline NS/HC NS/RC

Fontana NS/RC US/RC NS/RC US/RC NS/HC NS/RC

Glendora NS/RC NS/RC NS/HC

Indio NS/RC NS/HC NS/RC

La Habra NS/RC US/RC NS/RC

Lake Elsinore NS/RC NS/RC NS/RC

LAX Hastings MS/RC/BK MS/RC/BK NS/RC/BK MS/RC/BK NS/RC/BK NS/RC/BK

Long Beach (North) MI/HC MS/RC NS/HC MS/RC MI/RC NS/HC MI/RC

Los Angeles (Main St.) NS/RC NS/HC NS/RC NS/RC NS/RC NS/HC NS/RC

Mira Loma (Van Buren) NS/RC NS/RC NS/RC NS/HC NS/HC

Mission Viejo NS/RC NS/RC NS/RC NS/RC

Norco NS/RC

Ontario Fire Station NS/HC NS/RC

Palm Springs NS/RC NS/RC NS/RC NS/RC NS/RC

Pasadena MS/RC MS/HC NS/RC NS/RC

Perris NS/RC NS/RC

Pico Rivera #2 NS/RC NS/HC NS/HC NS/RC NS/RC

Pomona MI/RC MS/RC MS/HC

Redlands NS/RC NS/RC

Rehrig (Exide) MI/IM

Reseda NS/RC US/RC US/HC NS/RC

Riverside MI/HC US/RC NS/HC MI/HC

Rubidoux MS/RC US/RC NS/RC US/HC NS/HC NS/HC NS/RC

San Bernardino MS/RC US/RC NS/HC NS/HC NS/RC NS/RC

Santa Clarita NS/RC NS/RC US/HC NS/RC NS/RC

South Long Beach NS/HC NS/IM NS/HC

Temecula NS/HC

Uddelholm (Trojan Battery) MI/IM

Upland NS/RC NS/RC NS/RC NS/RC

Van Nuys Airport MI/IM

West Los Angeles NS/RC MS/HC MS/RC
Air Quality Monitoring Network Plan – July 2012

19

TABLE 3. FRM/FEM Criteria Pollutant Monitoring Purposes

MONITORING PURPOSE

BK – Background RC – Representative Concentration

HC – High Concentration SPM – Special Purpose Monitoring

TP – Pollutant Transport TR – Trend Analysis

EX – Population Exposure CP – Site Comparisons

SO – Source Impact CO - Collocated

Location CO NO2 SO2 O3 Manual 

PM10

Manual 

PM2.5 Pb

Anaheim TR TR/RC TR TR/RC TR/EX

ATSF (Exide) SO

Azusa TR TR/RC TR TR TR/EX

Banning Airport TP/RC TP TP

Big Bear EX/SO/TP

Closet World (Quemetco) SO

Burbank TR TR/RC TR TR TR/RC TR/EX

Compton TR/HC TR/RC TR/RC EX/RC EX

Costa Mesa RC TR/RC TR RC

Crestline HC TP/RC

Fontana RC TP/RC TR RC HC EX/TP

Glendora RC TR/RC HC

Indio TP HC/CO TP/EX

La Habra RC TR/RC RC

Lake Elsinore TP/RC TP/RC TP/RC

LAX Hastings BK BK BK BK BK BK

Long Beach (North) HC TR/RC TR/HC TR TR/RC EX/HC EX/CO

Los Angeles (Main St.) SO/RC SO/HC TR TR/RC TR/RC/CO EX/HC/CO EX/CO

Mira Loma (Van Buren) TR/RC TR/RC TR/HC HC EX/HC/CO

Mission Viejo RC TR/RC TR/RC EX/RC

Norco TR/RC

Ontario Fire Station HC/CO EX/RC

Palm Springs TP/RC TP/RC TP TP/HC EX/TP

Pasadena TR/RC TR/HC TR/RC EX/RC

Perris TP TR

Pico Rivera #2 RC HC HC EX/RC EX

Pomona RC RC HC

Redlands TP/RC TP/RC

Rehrig (Exide) SO/CO

Reseda RC TR/RC HC EX/RC

Riverside HC TR/RC EX/HC EX/CO

Rubidoux TR/RC TR/RC TR TR/HC TR/HC/CO EX/TR/HC/CO EX

San Bernardino TR/RC TP/RC TR/HC TR/HC EX/TR EX

Santa Clarita RC TP/RC TP/HC RC EX/RC

South Long Beach HC EX/SO EX

Uddelholm (Trojan Battery) SO

Temecula2 TR/HC

Upland RC TR/RC TR/RC EX

Van Nuys Airport SO

West Los Angeles RC TR/HC RC
Air Quality Monitoring Network Plan – July 2012

20

TABLE 4. Continuous PM10/PM2.5 Monitoring Purpose, Objective and Spatial Scales

MONITORING OBJECTIVE SPATIAL SCALE TYPE

HC – High Concentration MI – Microscale TEOM 

RC – Representative Concentration NS – Neighborhood Scale BAM (NON-FEM)

BK - Background BAM (FEM)

MONITORING PURPOSE

SO – Source Impact RM – Real-Time Reporting/Modeling

TP – Pollutant Transport SPM – Special Purpose Monitoring

TR – Trend Analysis CO - Collocated

Location Continuous PM10 Continuous PM2.5

Type Purpose Objective Scale Type Purpose Objective Scale

Anaheim BAM RM/TR RC NS BAM/FEM RM/TR RC NS

Banning Airport BAM/NON-FEM RM RC NS

Burbank TEOM RM/TR RC NS BAM/FEM RM/TR RC NS

Crestline BAM/NON-FEM RM RC NS

Glendora BAM RM RC NS BAM/NON-FEM RM RC NS

Indio TEOM RM HC NS

Lake Elsinore TEOM RM RC NS BAM/NON-FEM RM RC NS

Long Beach (North) BAM RM/TR RC NS BAM/FEM RM HC NS

Los Angeles (Main St.) BAM RM/TR RC NS BAM/FEM RM HC NS

Mira Loma (Van Buren) BAM RM HC NS BAM/FEM RM HC NS

Palm Springs TEOM RM/TP HC NS

Reseda BAM/NON-FEM RM RC NS

Riverside BAM RM HC NS BAM/NON-FEM RM HC NS

Rubidoux TEOM RM/TR HC NS BAM/FEM & NONFEM RM/TR/CO HC NS

San Bernardino TEOM RM/TR HC NS

Santa Clarita BAM/NON-FEM RM RC NS

South Long Beach BAM/FEM RM/SO RC NS

Temecula BAM/NON-FEM SPM RC NS

Upland BAM RM RC NS BAM/NON-FEM RM RC NS
Air Quality Monitoring Network Plan – July 2012

21

TABLE 5. Manual PM2.5 FRM Monitoring Stations Assigned Site Numbers

Location Site Code ARB No. AQS No. Start Date Schedule

Anaheim ANAH 30178 060590007 01/03/99 Daily

Azusa AZUS 70060 060370002 01/04/99 1-in-3

Big Bear BGBR 36001 060718001 02/08/99 1-in-6

Burbank BURK 70069 060371002 01/21/99 Daily

Compton COMP 70112 060371302 11/08 1-in-3

Fontana FONT 36197 060712002 01/03/99 1-in-3

Indio “A” INDI 33157 060652002 01/30/99 1-in-3

Long Beach (North) LGBH 70072 060374002 01/03/99 Daily

Los Angeles “A” (Main St.) CELA 70087 060371103 01/03/99 Daily

Los Angeles “B” (Main St.) CELA 70087 060371103 01/06/99 1-in-6

Mira Loma (Van Buren) MRLM 33165 060658005 11/09/05 Daily

Mira Loma (Van Buren) “B” MRLM 33165 060658005 03/08/12 1-in-6

Mission Viejo MSVJ 30002 060592022 06/15/99 1-in-3

Ontario Fire Station ONFS 36025 060710025 01/03/99 1-in-3

Palm Springs PLSP 33137 060655001 12/26/99 1-in-3

Pasadena PASA 70088 060372005 03/04/99 1-in-3

Pico Rivera #2 PICO 70185 060371602 09/12/05 1-in-3

Reseda RESE 70074 060371201 01/24/99 1-in-3

Riverside RIVM 33146 060651003 01/06/99 1-in-3

Rubidoux “A” RIVR 33144 060658001 01/03/99 Daily

Rubidoux “B” RIVR 33144 060658001 01/03/99 1-in-6

San Bernardino SNBO 36203 060719004 01/03/99 1-in-3

South Long Beach SLGB 70110 060374004 06/20/03 Daily
Air Quality Monitoring Network Plan – July 2012

22

TABLE 6. PAMS Proposed Network

July 1 to September 30 October 1 to June 30

Site 

Type

Date 

Established as 

PAMS

Site / AQS ID# VOC Carbonyl VOC Carbonyl Additional 

Requirements

1 04/01/2004

LAX Hastings 

(replaced 

Hawthorne)

8 x 3 hr samples every 3rd

day and 1 x 24 hr sample 

every 6th day

No Sampling 1 x 24 hr sample 

every 6th day No Sampling

2 06/01/1995 Azusa

8 x 3 hr samples every 3rd

day and 1 x 24 hour 

sample every 6th day

No Sampling 1 x 24 hr sample 

every 6th day No Sampling No/NOx required

2 07/01/1997 Burbank

Continuous GC and 1 x 

24 hr sample every 6th

day

8 x 3 hr samples every 

day and 1 x 24 hr 

sample every 6th day

1 x 24 hr sample 

every 6th day

1 x 24 hr sample 

every 6th day

2 06/01/2009 Los Angeles (Main)

8 x 3 hr samples every 3rd

day and 1 x 24 hour 

sample every 6th day

8 x 3 hr samples every 

3

rd day and 1 x 24 hr 

sample every 6th day

1 x 24 hr sample 

every 6th day

1 x 24 hr sample 

every 6th day

Trace level CO required

at one type 2 site.

2 08/01/2005 Pico Rivera #2

Continuous GC and 1 x 

24 hr sample every 6th

day

8 x 3 hr samples every 

day and 1 x 24 hr 

sample every 6th day

1 x 24 hr sample 

every 6th day

1 x 24 hr sample 

every 6th day

3 06/09/2009 Rubidoux

8 x 3 hr samples every 3rd

day and 1 x 24 hour 

sample every 6th day

No Sampling 1 x 24 hr sample 

every 6th day No Sampling NOy required

3 05/01/2001 Santa Clarita

8 x 3 hr samples every 3rd

day and 1 x 24 hour 

sample every 6th day

8 x 3 hr samples 3rd day

and 1 x 24 hr sample 

every 6th day

1 x 24 hr sample 

every 6th day

1 x 24 hr sample 

every 6th day

MONITORING OBJECTIVES: MONITORING REQUIREMENTS: REDUCED REQUIREMENTS:

1 – Upwind and background characterization site One type 1 or type 3 site required per area Speciated VOC only required at type 2 and one other 

(type 1 or 3)

2 – Maximum O3 precursor emissions impact site One type 2 site required per area Carbonyl only required in areas classified as serious 

or above 8 hr zone

3 – Maximum O3 concentration site No type 4 required NO/NOx required only at type 2

4 – Extreme downwind monitoring site NOy required at one site per PAMS area (type 1 or 3)
Air Quality Monitoring Network Plan – July 2012

23

TABLE 7. Near Road NO2 AADT/FE Values

FE 

ADDT 

Rank

HD 

Rank

AADT 

Rank

FE 

AADT

AADT 

Total

Total 

Trucks 

(HD)

Total 

Truck % County Post mile Route Description

1 24 4 732,828 343,000 23,770 6.93 LA 23.56 60 DIAMOND BAR, JCT. RTE. 57 SOUTH, ORANGE

2 1 38 731,843 263,000 28,588 10.87 LA 9.612 605 SANTA FE SPRINGS, JCT. RTE. 5, SANTA ANA

3 14 32 695,776 272,000 25,840 10 ORA 39 5 LINCOLN AVENUE

4 4 51 690,111 248,000 26,958 11 LA 14 605 WHITTIER, JCT. RTE. 72, WHITTIER BOULEVARD

5 5 51 690,111 248,000 26,958 10.87 LA 13.569 605 WHITTIER, JCT. RTE. 72, WHITTIER BOULEVARD

6 25 14 685,400 299,000 23,561 7.88 LA 7.653 605 NORWALK, JCT. RTE. 105, GLENN ANDERSON FREEWAY

7 59 3 679,014 357,000 19,635 5.5 ORA 34 5 SANTA ANA, JCT. RTE S. 22 AND 57, GARDEN

8 18 39 674,493 262,000 25,152 9.6 ORA 38.915 5 LINCOLN AVENUE

9 12 59 667,843 240,000 26,088 11 LA 17 605 INDUSTRY, JCT. RTE. 60, POMONA FREEWAY 

10 2 76 667,637 222,000 27,173 12.24 SBD 4.58 60 ONTARIO, JCT. RTE. 83

11 21 41 666,770 259,000 24,864 9.6 ORA 36.258 5 KATELLA AVENUE

12 3 77 664,620 221,000 27,050 12.24 SBD 2.366 60 CENTRAL AVENUE

13 6 78 661,619 220,000 26,928 12.24 SBD 2.366 60 CENTRAL AVENUE

14 19 54 656,842 245,300 25,094 10.23 SBD 9.936 10 ONTARIO, JCT. RTE. 15

15 20 54 656,842 245,300 25,094 10.23 SBD 11.132 10 ETIWANDA AVENUE

16 23 40 656,299 261,600 24,067 9.2 ORA 5.258 91 ANAHEIM, STATE COLLEGE BOULEVARD

17 7 80 655,601 218,000 26,683 12 SBD 5 60 ONTARIO, JCT. RTE. 83

18 10 75 652,729 223,000 26,203 12 LA 29 60 POMONA, JCT. RTE. 71, CHINO VALLEY FREEWAY

19 11 75 652,729 223,000 26,203 12 SBD 0 60 LOS ANGELES/SAN BERNARDINO COUNTY LINE

20 30 28 641,736 276,000 22,301 8.08 ORA 2.615 91 BUENA PARK, JCT. RTE. 39/BEACH BOULEVARD

21 15 83 636,004 215,000 25,671 11.94 SBD 5.855 60 GROVE AVENUE

22 33 26 635,438 278,000 21,795 8 LA 44 5 LOS ANGELES, JCT. RTE. 210, FOOTHILL FREEWAY

23 22 72 633,704 226,000 24,860 11 SBD 24 10 COLTON, JCT. RTE. 215

24 48 18 628,414 291,000 20,574 7 LA 36 5 LOS ANGELES, JCT. RTE. 170, HOLLYWOOD FREEWAY

25 8 106 626,404 191,000 26,549 14 LA 13 710 LONG BEACH, JCT. RTE. 91, ARTESIA FREEWAY

26 31 44 621,261 256,000 22,272 9 ORA 5 91 ANAHEIM, STATE COLLEGE BOULEVARD

27 37 36 618,485 266,000 21,493 8 ORA 3 91 BUENA PARK, JCT. RTE. 39/BEACH BOULEVARD