## SOUTH COAST AIR QUALITY MANAGEMENT DIST RICT

SOUTH COAST AIR QUALITY MANGEMENT DISTRICT ANNUAL AIR QUALITY MONITORING

NETWORK PLAN

JULY 2009

Prepared by

Rene M. Bermudez Principal Air Quality Instrument Specialist

Philip M. Fine Atmospheric Measurements ManagerAir Quality Monitoring Network Plan – July 2009

i 

## Table of Contents

Page Introduction 1 Public Comments 1 Network Design 1 Special Programs 6 Recent or Proposed Modifications to Network 8 Minimum Monitoring Requirements 13

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

Appendix C: NCore Monitoring Network Plan

Appendix D: Lead Monitoring Network Plan B-1

C-1

D-1Air Quality Monitoring Network Plan – July 2009

1 

### Introduction An annual review of the Air Quality Monitoring Netw ork is required by Federal Regulations as a means to identify and report needs for additions, r elocations, or terminations of monitoring sites or instrumentation. This report describes the netw ork of ambient air quality monitors in the jurisdiction of and operated by the South Coast Air Quality Management District. It includes a review of actions taken during the 2008-2009 fiscal year, and plans for action in the year ahead. This draft plan addresses the requirements for an a nnual network plan as listed in Title 40, Part 58, Section 10 of the Code of Federal Regulations ( 40 CFR 58.10). The regulations require that the report be submitted to the U.S. Environmental P rotection Agency (EPA) by July 1 of each
year.

The South Coast Air Quality Management District sta ff, along with the California Air Resources Board (CARB), conducted an extensive review of the air monitoring sites in the South Coast Air Basin (Basin) in late 1980. National (NAMS) or Sta te and Local (SLAMS) designations, monitoring objectives, and spatial scales of repres entativeness were assigned to the criteria pollutants monitored by site. Since that time, EPA Region IX staff and CARB staff visited all sites to confirm compliance with applicable siting criteria and related requirements. The most recent site visits occurred in 2000 to evaluate the PM 2.5 monitoring network. Each year, South Coast Air Quality Management District staff conduct s an annual review of its air monitoring network, and submits it to U.S. EPA. The review pro cess focuses on current and future network air monitoring strategies, and all network changes are made in consultation with U.S. EPA and CARB. When re-locations are required, site reports are updated in U.S. EPA’s Air Quality System (AQS) to document compliance with establishe d siting criteria for the new locations.



### Public Comments Pursuant to Federal regulations, this draft plan is to be made available for public inspection and comments for at least 30 days prior to submission t o U.S. EPA. Hard copies of this document were made available on June 1, 2009 at the South Co ast Air Quality Management District Public Information Desk in Diamond Bar, CA. The document was also posted to the public South Coast Air Quality Management District website at ww w.aqmd.gov on June 1, 2009, with links under the South Coast Air Quality Management Distri ct home page titled “Current Programs, Events and Topics.” Links to the document were als o provided in the “Air Quality” area of the website. The draft document will also be made ava ilable to U.S. EPA during this period for review.



### Network Design The South Coast Air Quality Management District ope rates 35 permanent air monitoring sites in the South Coast Air Basin and a portion of the Salt on Sea Air Basin in Coachella Valley. This area includes Orange County and the non-desert port ions of Los Angeles, Riverside and San Bernardino Counties. The newest permanent site was added in 2008 at Compton to replace the Lynwood air monitoring location. Table 1 provides a list of monitoring locations, the U.S. EPA AQS site codes, and the pollutants measured at each site. Table 2 provides monitoring objective and the spatial scale for each monitor at each site

.
Table 3 describes the monitoring purpose for each m onitor at each site. Table 4 describes the monitoring objective, purpose, and spatial scale fo r continuous particulate analyzers at each site.Air Quality Monitoring Network Plan – July 2009

2 A new requirement of the annual network plan implem ented in 2007, the monitoring purpose is the reason why a certain pollutant is being measure d at a certain site. A list and description of monitoring purposes is provided below, and portions are adapted from the CARB annual network plan for 2007.

Background Level monitoring is use to determine general background levels of air pollutants as they enter the South Coast Air Basin.

High Concentration monitoring is conducted at sites to determine the highest concentration of an air pollutant in an area within the monitorin g network. A monitoring network may have multiple high concentration sites (i.e., due t o varying meteorology year to year).

Pollutant Transport

is the movement of pollutant between air basins or areas within an air basin. Transport monitoring is use to assess and m itigate upwind areas when transported pollutant affects neighboring downwind areas. Also , transport monitoring is use to determine the extent of regional pollutant transpor t among populated areas and to rural

areas.

Population Exposure monitoring is conducted to represent the air pollu tant concentrations a populated area is exposed to.

Representative Concentration monitoring is conducted to represent the air quali ty concentrations for a pollutant expected to be simil ar throughout a geographical area. These sites do not necessarily indicate the highest conce ntrations in the area for a particular pollutant.

Source Impact

monitoring is used to determine the impact of sign ificant 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 a ir 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 measure d pollutant levels of moving a monitoring location a short distance (usua lly 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 con duct 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 whic h reports conditions for air pollutants on a real tim e basis to the general public. Data is also used to provide accurate and timely air quality for ecast guidance to residents of the South Coast basin.Air Quality Monitoring Network Plan – July 2009

3 Multiple purposes for measuring a pollutant at a pa rticular site are possible. There is some overlap between monitoring objectives as defined by EPA and given in Table 2, and the monitoring purposes provided in Table 3.

A brief description of the network for each criteri a pollutant monitored is provided below:

OZONE The SCAQMD operates 30 sites where ozone measuremen ts are made as part of the Air Monitoring Network. Figure 1 in Appendix A shows t he spatial distribution of these sites.

PM10 Size-selective inlet high volume samplers are opera ted at 22 sites to meet the requirements for PM10 FRM sampling; at 12 of the sampling sites, PM10 continuous analyzers are also operated. These real-time devices are capable of m aking hourly particulate concentration measurements. Figure 2 in Appendix A shows the spa tial 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-blow n crustal material has caused exceedences of the 24-hour Standard. In downwind a reas of the South Coast Air Basin, a large fraction of particulate is formed in the atmo sphere. PM10 reaches maximum levels during late summer through early winter months. Al l PM10 FRM monitors operate on a one day in six schedule with the exception of Indio and Rubidoux which operate on one day in three schedule.

NITROGEN DIOXIDE The nitrogen dioxide (NO2) network consists of 26 s ites. These sites are mostly located in areas of highest NO2 concentration. The spatial di stribution of NO2 monitors is shown in Figure 3 in Appendix A. Review of 1992 through 200 7 data indicates that the Federal annual average standard was not exceeded.

CARBON MONOXIDE Ambient carbon monoxide (CO) monitors measure conce ntrations at 26 locations. Figure 4, Appendix A, shows the spatial distribution of th ese sites. Carbon monoxide emissions, primarily from motor vehicles, show a pattern congr uent with major freeway arteries.

SULFUR DIOXIDE Sulfur dioxide (SO2) monitors are located at 7 site s. Figure 5 in appendix A shows the spatial distribution of the sites. Most SO2 emissi ons come from federal transportation sources such as marine vessels. The monitors are c lustered mostly in the areas where these sources are located. The federal standard has not been exceeded for nearly 30 years.

PARTICULATE LEAD Total suspected particulate lead measurements are c ollected at 12 sites as part of the network. The spatial distribution of these sites i s shown in Figure 6 in Appendix A. With the phasing out of lead in gasoline, ambient lead l evels decreased to the point that a reduction in the network was made—reducing the numb er of sites from 27 to ten.Air Quality Monitoring Network Plan – July 2009

4 In 1990, U.S. EPA requested that the South Coast Ai r Quality Management District collect ambient air particulate lead samples near several l arge lead handling (battery recycling) facilities. Long-term source impacted monitoring b egan in 1991. A facility in the City of Industry exceeded the federal ambient particulate l ead standard during the second quarter of Fiscal Year 1991-92

. Lead monitoring at a facility in the City of Torr ance 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 facil ity in the City of Vernon exceeded the old federal ambient particulate lead standard (1.5 ug/m 3 quarterly) during the first quarter of 2008; the other facility was found to remain below this level. These source-related lead sites are also depicted in Figure 6. Changes to th e Lead sampling network in response to the new Lead NAAQS and monitoring requirements (Oct ober 2008) are described later in this report.

PAMS Network Plan The PAMS (Photochemical Assessment Monitoring Stati ons) network was initiated in June 1994 at Pico Rivera and Upland, and in 1995 at Banning and Azusa, to determine speciated hydrocarbon ozone-precursor compounds in ambient air. PAMS monitoring at Hawthorne commenced in June 1997, and the Burbank s tation 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 Hastin gs, due to the end of a property lease. In August 2005, the Pico Rivera station mov ed to a new location one half mile south of the previous site, also due to the end of the pr operty lease. Figure 7 in Appendix A shows the distribution of the PAMS network.

An automated gas chromatography flame ionization de tector (GC\FID) VOC system is in operation at the Pico Rivera air monitoring station with a VOC canister and carbonyl sampling. During the intensive sampling season fro m July 1, until September 30, GC\FID is run continuously; twenty-four hour VOC canisters are run every 6 th day, and carbonyl samples are run continuously every three hours with one additional twenty-four hour sample run every 6 th day. During the non-intensive season from October 1, through June 30, twenty-four hour VOC canister samples are run e very 6 th day and twenty-four hour carbonyl samples are run every 6 th day. Pico Rivera is a collocated site for VOC can ister and carbonyl sampling.

A similar automated gas chromatography flame ioniza tion detector GC\FID VOC system was installed at the Burbank air monitoring station in July 1997. During the intensive sampling season from July 1, until September 30, GC \FID is run continuously; twenty-four hour VOC canisters are run every 6 th day, and carbonyl samples are run continuously eve ry three hours with one additional twenty four hour sa mple run every 6 th day. During the non-intensive season from October 1, through June 3 0, twenty-four hour VOC canister samples are run every 6 th day and twenty four hour carbonyl samples are run every 6 th day.

Manual VOC canister and carbonyl systems are in ope ration at Banning and Santa Clarita air monitoring stations. During the intensive seas on from July 1, until September 30, VOC canisters are run every three hours for a period of twenty-four hours every 3 rd day and aAir Quality Monitoring Network Plan – July 2009

5 twenty-four hour sample is run every 6 th day. Carbonyl samples are run every three hours for a period of twenty-four hours every third day a nd a twenty-four hour sample is run every 6 th day. During the non-intensive season from October1, through June 30, twentyfour hour VOC canister samples are run every 6 th day and twenty-four hour carbonyl samples are run every 6 th day.

Manual VOC canister systems are in operation at Azu sa, LAX Hastings, and Azusa air monitoring stations. During the intensive season f rom July 1 until September 30, VOC canisters are run every three hours for a period of twenty-four hours every 3 rd day and a twenty-four hour sample is run every 6 th day. During the non-intensive season from October 1 though June 30, twenty-four hour VOC cani ster samples are run every 6 th day

The first South Coast Air Quality Management Distri ct upper air monitoring station was established at Los Angeles International Airport (L AX) in 1994. Subsequent upper air stations include Ontario International Airport (ONT ), installed in 1996, Moreno Valley (MOV) installed in 2001 at the Moreno Valley Munici pal Water Treatment Plant in Riverside County, Irvine installed at the Universit y of California Research and Extension Center in 2006, and Pacoima at Whiteman Airport dur ing May 2007. The upper air stations use a combination of remote sensing and su rface meteorological instrumentation, including the Vaisala (formerly Radian/URS) LAP-300 0 radar wind profiler with a Radio Acoustic Sounding System (RASS), the Atmospheric Sy stems Corporation (formerly AeroVironment Inc.) mini Sodar acoustic wind profil er, and tower-mounted meteorological measurements of wind, pressure, temp erature, relative humidity, solar radiation and ultraviolet radiation.

In FY 2009-10 South Coast AQMD plans to make adjust ments to the PAMS monitoring network based on recent EPA changes to PAMS monitor ing requirements in 40 CFR part 58. Details of proposed changes are included in th e section titled, “Recent or Proposed Changes to Network.”

PM2.5 A network of 17 Federal Reference Method (FRM) samp lers was first implemented in January 1999. On December 26, 1999, a second Coach ella 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 FR M network occurred in October 2005, at the new Mira Loma site. This brings the total n umber of PM2.5 FRM sampling sites to 20. The sites are depicted in Figure 8, Appendix A and the actual starting date of each sampler is listed in Table 5. Collocated sampler s ites are at Rubidoux, Central Los Angeles, and Indio. All sites in the Network using FRM samplers are suitable for comparison against the annual PM2.5 National Ambien t Air Quality Standard (NAAQS).

Continuous PM2.5 Met One Beta Attenuation Monitors (BAMs) were first deployed in Fiscal Year 2001–02. Thirteen monitors are now ope rating in the Basin, two at Rubidoux (collocated), and one each at Anaheim, Los Angeles, South Long Beach, Burbank, Mira Loma (Van Buren), and Banning. In January 2006, tw o additional samplers were added at Lake Elsinore and Glendora as part of the Children’ s Health Study. As proposed in theAir Quality Monitoring Network Plan – July 2009

6 2008 network plan, FEM BAM monitors were deployed d uring October 2008, at the Anaheim, Burbank, Long Beach (North), Los Angeles ( Main), Mira Loma (Van Buren), Rubidoux, and Long Beach (South) sites. All FEM B AMs continue to maintain the Special Purpose Monitor designation under 40 CFR 58 .20 until sufficient data are collected for comparison to collocated FRMs. Non-FEM monitor s that became available were moved to the Reseda and Santa Clarita sites. In t he coming year South Coast Air Quality Management District will deploy additional non-FEM BAM samplers to enhance wildfire response capabilities and the Children’s Health stu dy both described in the section titled, “Proposed Modifications to Network.”

PM2.5 speciation sampling is also a part of the Sou th Coast Air Quality Management District PM2.5 program. Two Speciation Trends Netw ork (STN) and one South Coast Air Quality Management District Met One SASS PM2.5 samp lers were deployed in March 2001 at Rubidoux. One more STN and two SCAQMD 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. In 2004, a sampler was installed at Long Beach as part of the MATES III project, and continues to run as part of the Port Area Monitoring Program and the 2009 Air Quality Management Plan (A QMP) Speciation Study (see below). In January 2009, two additional South Coas t Air Quality Management District SASS speciation samplers were installed at Burbank and Upland air monitoring sites, also for the 2009 AQMDP Speciation Study. Analysis of t he filters from the ambient network SASS samplers is being conducted at South Coast Air Quality Management District’s laboratory. The STN filters are shipped to RTI for analysis. This approach has the concurrence of CARB and U.S. EPA, Region IX.

National Ambient Toxics Trends Sites (NATTS) The National Air Toxics Trends Sites (NATTS) progra m was developed to fulfill the need for long-term hazardous air pollutants (HAPs) monit oring data of consistent quality nationwide. South Coast Air Quality Management Dis trict has conducted several air toxics measurement campaigns in the past which demonstrate d the variety and spatial distribution of air toxics sources across the South Coast Air Ba sin. A single air toxics measurement site can not reflect the levels and trends of air t oxics throughout the South Coast Air Basin; because of this, two NATTS sites are used to charac terize the South Coast Basin’s air toxics levels. The first site is a central urban c ore site in central Los Angeles that reflects concentrations and trends due primary to urban mobi le source emissions. A second, more rural, inland site at Rubidoux captures the transpo rt of pollutants from a variety of upwind mobile and industrial sources in the most populated areas of the air basin. NATTS monitoring began in February 2007 and continues at the Central Los Angeles and Rubidoux air monitoring sites.



### Special Programs Special monitoring programs are conducted for rule compliance purposes or to characterize the levels of toxic air contaminants and other criteria pollutants in sub-regional areas or communities in the Basin, or to support modeling and planning e fforts. The following is a list of special monitoring programs that were active during the pas t year. Note that this is being provided forAir Quality Monitoring Network Plan – July 2009

7 informational purposes only. At this time, none of the Special Monitoring Programs are designated as a “Special Purpose Monitor” under 40 CFR 58.20.

Multiple Air Toxics Exposure Study (MATES-III) MATES is the most comprehensive urban air quality s tudy to date. In April 2004, the South Coast Air Quality Management District initiat ed the third round of MATES (MATES-III) to assess the ambient levels of airborn e compounds linked to adverse health effects in humans. The previous study, MATES-II, w as a year-long intensive sampling program. During the study, air toxics were monitore d at ten fixed sites and additional short-term “micro-scale” monitoring was conducted a t 14 sites using five mobile sampling platforms. Fixed sites were established to assess regional air toxics, while micro-scale sites assess source impacts on a more local level, such as an area of heavy industrial activity in close proximity to a residential area. MATES-III incorporated elements of the two prior studies to establish trend assessments wi th similar sampling methodologies. Enhancements to the sampling network with the lates t air monitoring technologies and more frequent sampling schedules were also incorpor ated. Instrumentation at each site measured PM10, speciated PM2.5, VOCs, and air toxic s such as heavy metals, hexavalent chromium, and carbonyls.

The 2004-05 winter season in Southern California pr oduced record levels of rainfall in most areas of the South Coast Air Basin. As expect ed, this lead to lower than expected levels of airborne constituents including PM concen trations. As a result, MATES-III was extended an additional year to collect more represe ntative air toxics data. Sampling at the fixed sites was completed in April 2006. Micro-sca le sampling has been completed at the Indio, San Bernardino, Commerce, La Puente, Santa A na, and Sun Valley sites. The final micro-scale site is located adjacent to Long Beach Airport and was completed in October 2006. A draft report for the MATES-III study was m ade available for public review and the final draft was published in September 2008.

Fugitive Dust Study In support of South Coast Air Quality Management Di strict Rule 403 - Fugitive Dust, SSI PM10 samplers are deployed on an episodic basis upw ind and downwind of potential sources as required under Rule 403. Since 2003, pe riodic sampling has been conducted around gravel quarries and other industries which s eem to be producing large volumes of dust. This sampling will continue through 2009 and 2010. A special instrument evaluation study was also initiated to assess alter native monitoring methodologies for Rule 403 compliance testing.

Hexavalent Chrome The South Coast Air Quality Management District has an ongoing program of collecting ambient hexavalent chromium in the vicinity of seve ral chrome plating and cement production facilities located throughout the basin. Monitoring continues at Newport Beach, Riverside, and other locations throughout th e South Coast Air Quality Management District jurisdiction.Air Quality Monitoring Network Plan – July 2009

8 Port Area Monitoring Program The South Coast Air Quality Management District is conducting an intensive air monitoring program in the communities adjacent to t he Ports of Los Angeles and Long Beach. Monitoring consists of all gaseous criteria pollutants, air toxics compounds as measured in MATES-III, as well as continuous PM2.5 and PM2.5 speciation. Sampling began at four sites in February 2007. Two more sit es began operation in June 2007 and an additional site was added during November, 2007. S ampling was completed in January 2009, and data quality assessment and analysis is o ngoing. Monitoring activities are being coordinated with the two Ports’ air monitoring prog rams as well as several CARB Research studies in the area.

2009 Air Quality Management Plan Speciation Study ( AQMP) Every three years, or as required by federal regula tion, the South Coast AQMD prepares an Air Quality Management Plan (AQMP) outlining planne d measures to bring the South Coast into attainment with federal and state ambien t air quality standards. Once complete, the AQMP is submitted to the California Air Resourc es Board (CARB) for inclusion in the state implementation plan (SIP). The next plan is scheduled for completion in late 2010 and will address the 24-hour PM 2.5 NAAQS. In support of the 2010 AQMP analysis and modeling efforts, an enhanced speciation network wa s deployed for calendar year 2009. PM 2.5 SASS samplers were installed at Burbank and Upland on January 1 st , 2009. The Long Beach (North) SASS sampler originally installe d in 2004 as part of the MATES-III program and then the Port Area Monitoring Program c ontinues to run in support of the AQMP. During calendar year 2009, the South Coast A QMD PM 2.5 SASS network (seven sites) continues to collect samples on a 1-in-3 day basis.



### Recent or Proposed Modifications to Network

Temecula AMS During October 2007, Southern California experience d some of the most severe wildfires in recent history. To measure particulate matter f or comparison to NAAQS, South Coast AQMD has used twenty-four hour FRM filter-based PM measurements. However, providing public information based on real-time hou rly data is more appropriate for fire events. Currently South Coast Air Quality Manageme nt District does not have a location to represent the Temecula Valley. During FY 2009-1 0, South Coast Air Quality Management District proposes the establishment of a location in the Temecula Valley to monitor PM2.5 on a continuous basis.

Crestline South Coast AQMD has been operating the Crestline s tation 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 relocation. As part of regular air monitoring station improvements a new station shelter as been ordered to replace the existing trailer. South Coast proposes relocation of the site to a location which more adequately represents the area. Concurrent monitoring will take place for da ta comparison prior to any permanent move to a new site.Air Quality Monitoring Network Plan – July 2009

9 Lynwood South Coast Air Quality Management District has bee n operating the Lynwood station since 1973. The deteriorating state of the leased building has made it necessary to relocate the station to nearby Compton, a former MATES-III s ite, located two miles from current site. Concurrent CO monitoring began at the new si te in May 2005. A comparison between the two sites found data trends to be compa rable. On October 30 th , 2008 the Lynwood station permanently closed and on November 5 th 2008, the Compton site began monitoring as a permanent network site.

Mira Loma South Coast Air Quality Management District has bee n operating the Mira Loma (Jurupa) station as part of the Children’s Health Study. Th e deteriorating state of the leased trailer along with the compromises made to the siting crite ria because of school expansion makes it a candidate for relocation to a more representat ive site. Concurrent monitoring began at the Mira Loma (Van Buren) station in November, 2005 . Comparisons between the two sites found data trends to be comparable. Closure of the Mira Loma (Jurupa) is planned during FY 2009-10.

Long Beach (South) South Coast Air Quality Management District has bee n operating the Long Beach (South) station as part of the ambient air monitoring netwo rk. Recent construction of the buildings adjacent to our air monitoring equipment compromise s the siting criteria. Monitoring began at the Long Beach (Anaheim St.) site as part of the Port Area Monitoring Project during 2007. If comparison of concurrent data betw een the two locations demonstrates some comparability, or if the Anaheim St. site show s consistently higher levels of PM, the Long Beach (South) site may be relocated to Anaheim St. in FY 2009-10.

PM2.5 Monitoring Network As part of the actions to enhance continuous data c ollection capability for wild fire events as well as health studies, South Coast AQMD began t he process of adding of seven continuous PM 2.5 Beta Attenuation monitors (BAM) in October of 2008 . The seven new BAMs are Met One BAM 1020 Federal Equivalency Metho d (FEM) approved monitors. FEM Monitors were installed at Anaheim, Burbank, Lo ng Beach, Los Angeles, Mira Loma (Van Buren), Rubidoux, and South Long Beach. Reloc ated Non-FEM BAM monitors were installed at Reseda and Santa Clarita. Additi onal relocated samplers are to be installed during 2009 at the Crestline, Riverside M agnolia, Temecula, and Upland sites. Rubidoux will have a non-FEM BAM 1020 collocated wi th a FEM BAM 1020. FEM BAMS are designated as Special Purpose Monitors (SP M) for a period of two years to assess comparability to FRM samples.

South Coast AQMD also completed minor changes to th e current FRM monitoring schedule to enhance FEM BAM comparisons. On April, 16 th , 2009 the Burbank and Mira Loma (Van Buren) FRM samplers changed to daily samp ling 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 PM 2.5 are still being met and/or exceeded.Air Quality Monitoring Network Plan – July 2009

10 In 2009, South Coast Air Quality Management Distric t began enhanced speciated PM 2.5 sampling in support if the AQMP (see Special Studie s above). Met One speciation samplers (SASS) began 1-in-3 day operation on Janua ry 1 st 2009 for a period of one year at the Burbank, Long Beach (North) and Upland sites . Existing speciation sites at Central Los Angeles, Rubidoux, Fontana, and Anaheim increas ed sampling frequently from 1-in-6 day to 1-in-3 day for calendar year 2009.

NCore NCore monitoring rules require that South Coast Air Quality Management District make NCore stations operational by January 1 st , 2011. To meet this goal, South Coast Air Quality Management District has purchased trace lev el analyzers for CO, NOy and SO2. NCore stations will be located at Rubidoux and Cent ral Los Angeles, which are both existing STN and NATTS sites. See Appendix C for t he complete NCore network plan.

PAMS On October 17th, 2006, EPA issued final amendments to PAMS monitoring requirements in 40 CFR part 58. The changes were to implement t he recommendations of the PAMS workgroup. Changes reflected site type and monitor ing objectives defined as:

Type 1 – Upwind and background characterization sit e. Type 1 sites are intended to characterize upwind, background and transported ozo ne and its precursor concentrations entering the area. Type 1 sites are located in the predominant morning upwind direction from the local area of maximum precursor emissions and at a distance sufficient to obtain urban scale measurements. Type 2 – Maximum ozone precursor emissions impact s ites. Type 2 sites are intended to monitor the magnitude and type of precursor emissio ns in the area where maximum precursor emissions representative of the metropoli tan statistical area (MSA) are expected to impact. Type 2 sites are located immediately do wnwind of the area of maximum precursor emissions. They are typically placed nea r the downwind boundary of the central business district or primary area of precursor emis sions mix to obtain neighborhood-scale measurements. If additional Type 2 monitoring is r equired, Type 2A sites are placed in the second most predominant morning wind direction. Type 3 – Maximum ozone concentration sites. Type 3 sites are intended to monitor maximum ozone concentrations occurring downwind fro m the area of maximum precursor emissions. Typically, these sites are located 10 t o 30 miles from the fringe of the urban

area. Type 4 – Extreme downwind monitoring sites. Type 4 sites are intended to characterize the extreme downwind transported ozone and its prec ursor concentrations exiting the area. Type 4 sites are located in the predominant afterno on downwind direction from the local area of maximum precursor emissions at a distance s ufficient to obtain urban-scale

measurements.

EPA final amendments to PAMS monitoring requirement s proposed a reduction in the number of required PAMS sites as follows:

 Only one Type 2 site would be required per area reg ardless of population.Air Quality Monitoring Network Plan – July 2009

11  Type 4 sites would no longer be required.

 Only one Type 1 or one Type 3 site would be require d per area.

 Speciated VOC measurements would only be required a t Type 2 sites and one other site (either Type 1 or Type 3) per PAMS area.

 Carbonyl sampling would only be required in areas c lassified as serious or above for the 8-hour O3 standard.

 Conventional NO2/NOx monitors would only be require d at Type 2 sites.

 High sensitivity NOy monitors would be required at one site per PAMS area (either Type 1 or Type 3).

 High sensitivity CO monitor would be required at on e Type 2 sites per PAMS area.

EPA also suggested that where possible, NCore multi pollutant stations should be collocated, with other multipollutant air monitorin g stations including PAMS, National Air Toxic Trends Station sites (NATTS), and the PM2.5 S peciation Trends Network sites (STN). Collocation allows use of the same monitorin g platform and equipment to meet the objectives of multiple programs.

In September 2008, a report from the EPA PAMS netwo rk assessment project was issued whose objectives were to assess how well the curren t PAMS network was meeting its monitoring objectives, to determine which sites are most useful for meeting these objectives, to identify potentially redundant, inef fective, or unnecessary sites, and to assess other enhanced ozone monitoring activities that may prove useful. South Coast PAMS network site specific observations include:

 Burbank – highest concentrations in country; reclas sify as a type 2 site.

 Santa Clarita – high ozone, VOC, and NOx concentrat ions; consistent with Type 2 site characteristics.

 Banning – lowest concentrations in South Coast Air Basin among type 2 sites; data more consistent with Type 3 or 4 site when entire L A basin is considered; consider reclassifying site.

 Azusa – high VOC and NOx concentrations, low ozone concentrations; site now more closely resembles a Type 2 site and evaluate i ts usefulness.

 Upland – no longer consistent with Type 4 site char acteristics; consider classifying as Type 3.

 LAX Hastings – high absolute concentrations, low re lative to other sites; characteristic of a Type 1 site under typical wind conditions.

 Pico Rivera – very high NO x concentrations; consistent with type 2 site characteristics.

To address regulatory changes, site specific observ ations from the PAMS network assessment project, and potential synergies between programs, South Coast proposes the following changes to the current PAMS monitoring ne twork:

 Burbank to be reclassified from Type 2/1 to Type 2. This proposed change addresses the PAMS network assessment project obser vation that Burbank has theAir Quality Monitoring Network Plan – July 2009

12 highest concentrations for ozone in the country and that it should be reclassified as a Type 2 site.

 Santa Clarita to be reclassified as Type 3 from Typ e 2. Although the PAMS network assessment project observed that Santa is c onsistent with Type 2 site, data is more consistent with a Type 3 maximum ozone conc entration site than a Type 2 ozone precursor site.

 Banning to be relocated to Los Angeles (Main). The PAMS network assessment project observed that Banning was the lowest of all the Type 2 sites and should be reclassified to a Type 3 or 4 site. Considering re gulatory changes, and EPA desire to have multipollutant stations collocated among PA MS, NATTS, NCore, and STN programs, South Coast proposes relocation of the Ba nning PAMS site to the Los Angeles (Main) site as a Type 2 site. This satisfi es the EPA recommendation for use of the same monitoring platform and equipment t o meet the objectives of multiple programs.

 Azusa to be reclassified from Type 3 to Type 2. Th is proposed change addresses the PAMS network assessment project observation tha t Azusa has high VOC, and NO x concentrations, while also having low ozone concen trations. The site now more closely resembles a Type 2 ozone precursor sit e.

 Upland to be relocated to Rubidoux site. The PAMS network assessment project observed that Upland was no longer consistent with a Type 4 site and recommended reclassification to Type 3. Considerin g regulatory changes and EPA desire to have multipollutant stations collocated a mong PAMS, NATTS, NCore, and STN programs; South Coast proposes relocation o f the Upland PAMS site further inland to the Rubidoux site as a more appro priate Type 3 location.

 LAX Hastings and Pico Rivera are to remain unchange d.

The proposed PAMS network changes, monitoring objec tives and requirements are summarized in TABLE 6.

Lead Monitoring Network
On October 15 th , 2008 EPA issued the final rule for Lead National Ambient Air Quality Standards (NAAQS). The rule lowered the level and form of the NAAQS for ambient Lead, and requires state monitoring network plans t o be submitted to EPA by July 1 st , 2009 as part of the annual network plan. Implementation of newly-required source oriented monitors must occur by January 1 st , 2011. South Coast AQMD currently operates a particulate lead network which consists of 10 non-s ource-oriented monitors and 4 source specific locations (at three sources). The spatial distribution of these sites is shown in Figure 6 in Appendix A; please see Appendix D for t he complete Lead Network Plan.

Air Monitoring Station Improvements As part of the actions to enhance quality of data c ollected; SCAQMD will replace existing deteriorated shelters at the Crestline, Indio, La H abra, Pasadena, Redlands, Rubidoux, San Bernardino, and West Los Angeles sites. The new sh elters will be installed at the same locations as the existing structures.Air Quality Monitoring Network Plan – July 2009

13 

### Minimum Monitoring Requirements The SCAQMD jurisdictional boundary encompasses two Metropolitan Statistical Areas (MSA) as defined by the U.S. Office of Management and Bud get and the U.S. Census Bureau. The Los Angeles-Long Beach-Santa Ana MSA (Code 31100) had a population of 12,365,627 based on the year 2000 U.S. Census. The Riverside-San Berna rdino-Ontario MSA (Code 40140) had a population of 3,254,821 in 2000. The minimum numbe r of monitors for each pollutant is based on MSA population as described in 40 CFR 58 Appendi x D. The SCAQMD network exceeds the minimum monitoring requirements for all criteri a pollutants. Details are provided below.

Ozone

MSA Min. #

Monitors Required #

Monitors Active 31100 4 17 40140 2 13

PM2.5

MSA Min. #

Monitors Required #

Monitors Active 31100 3 12 40140 3 11

PM10

MSA Min. #

Monitors Required #

Monitors Active 31100 4-8 9 40140 6-10 16

NO2

MSA Min. #

Monitors Required #

Monitors Active 31100 0 16 40140 0 9

SO2

MSA Min. #

Monitors Required #

Monitors Active 31100 0 5 40140 0 2Air Quality Monitoring Network Plan – July 2009

14 CO

MSA Min. #

Monitors Required #

Monitors Active 31100 0 17 40140 0 9

Pb

MSA Min. #

Monitors Required #

Monitors Active 31100 2 7 40140 0 5

Minimum PAMS Monitoring
South Coast AQMD Monitoring Area Min. # Monitors Sites Required # Monitoring

Sites Active

Type 1 or 3 1 3 Type 2 2 4 Type 4 0 0Air Quality Monitoring Network Plan – July 2009

15 TABLE 1. List of Monitoring Sites

Location AQS No. Pollutants Monitored Start Date
Anaheim 060590007 CO,NO2,O3,PM10,PM2.5 08/01
Azusa 060370002 CO,NO2,O3,PM10,PM2.5,SO4 01/57 Banning Airport 060650012 NO2,O3,PM10, PM2.5 04/97 Big Bear 060718001 PM2.5 02/99
Burbank 060371002 CO,NO2,SO2,O3,PM10,PM2.5 10/61 Compton 3 060371302 CO,NO2,O3,Pb,PM2.5 01/04
Costa Mesa 060591003 CO,NO2,SO2,O3 11/89
Crestline 060710005 O3,PM10 10/73
Fontana 060712002 CO,NO2,SO2,O3,PM10,PM2.5,SO4 08/81
Glendora 060370016 CO,NO2,O3,PM2.5,PM10 08/80
Indio 060652002 O3,PM10,PM2.5 01/83
La Habra 060595001 CO,NO2,O3 08/60
Lake Elsinore 060659001 CO,NO2,O3,PM2.5,PM10 06/87 LAX Hastings 060375005 CO,NO2,O3,PM10,Pb,SO4 04/04 Long Beach (Anaheim St.) 1 TBD Long Beach (Hudson) 1 TBD Long Beach (North) 060374002 CO,NO2,SO2,O3,PM10,PM2.5,Pb,SO4 10/62 Los Angeles (Main St.) 060371103 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO4 09/79 Lynwood 2 060371301 CO,NO2,O3,Pb.PM2.5 10/73 Mira Loma (Jurupa) 4 N/A CO,NO2,O3,PM10 10/93 Mira Loma (Van Buren) 060658005 CO,NO2,O3,PM10,PM2.5 11/05 Mission Viejo 060592022 CO,O3,PM10,PM2.5 06/99
Norco 060650003 PM10 12/80
Ontario Fire Station 060710025 PM10,PM2.5 01/99 Palm Springs 060655001 CO,NO2,O3,PM10,PM2.5 04/71
Pasadena 060372005 CO,NO2,O3,PM2.5,SO4 04/82
Perris 060656001 O3,PM10 05/73
Pico Rivera #2 060371602 CO,NO2,O3,Pb,PM2.5,SO4,PM10 09/05
Pomona 060371701 CO,NO2,O3 06/65
Redlands 060714003 O3,PM10 09/86
Reseda 060371201 CO,NO2,O3,PM2.5 03/65
Riverside 060651003 CO,Pb,PM2.5,SO4 10/72
Rubidoux 060658001 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO4 09/72
San Bernardino 060719004 CO,NO2,O3,PM10,Pb,PM2.5 05/86
Santa Clarita 060376012 CO,NO2,O3,PM10,PM2.5 05/01 South Long Beach 060374004 PM10,Pb,PM2.5,SO4 06/03
Temecula 1 TBD Upland 060711004 CO,NO2,O3,Pb,PM2.5,PM10,SO4 03/73 West Los Angeles 060370113 CO,NO2,O3,SO4 05/84

1 Site to begin operation in Fiscal Year 2009-2010

2 Site closed 10/30/08

3 Site replaced Lynwood AMS 11/05/08

4 Site to be closed in Fiscal Year 2009-2010Air Quality Monitoring Network Plan – July 2009

16 TABLE 2. FRM/FEM Criteria Pollutant Monitoring Obje ctive and Spatial Scales

MONITORING OBJECTIVE SPATIAL SCALE HC – High Concentrations MI – Microscale RC – Representative Concentrations MS – Middle Scal e IM – Impact NS – Neighborhood Scale BL – Background US – Urban Scale

Location CO NO2 SO2 O3 PM10 PM2.5 Pb Anaheim NS/RC US/RC NS/RC NS/RC NS/RC 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 Compton 3 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 MS/RC NS/RC MS/RC NS/RC NS/RC Long Beach ( Anaheim St ) 1 Long Beach ( Hudson ) Long Beach ( North ) 6 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 Lynwood 2 MS/HC MS/RC NS/RC NS/RC NS/RC Mira Loma ( Jurupa ) 4 NS/RC NS/RC NS/RC NS/HC Mira Loma ( Van Buren ) NS/RC NS/RC NS/RC NS/HC NS/RC 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 Reseda NS/RC US/RC US/HC NS/RC Riverside 5,6 MI/HC US/RC NS/RC MI/HC Rubidoux MS/RC US/RC NS/RC US/HC NS/HC NS/HC NS/RC
San Bernardino 6 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/RC NS/HC Temecula 1 Upland NS/RC NS/RC NS/RC NS/RC West Los Angeles NS/RC MS/HC MS/RC

1 Site to begin operation in Fiscal Year 2009-2010

2 Site closed 10/30/08
3 Site replaced Lynwood AMS 11/05/08

4 Site to be closed Fiscal Year 2009-2010

5 NO2 monitor installed 10/02/08 as SPM

6 Pb to be discontinued FY 2009-2010Air Quality Monitoring Network Plan – July 2009

17 TABLE 3. FRM/FEM Criteria Pollutant Monitoring Purp oses

MONITORING PURPOSE BK – Background Level RC – Representative Concentra tion HC – High Concentration SPM – Special Purpose Monit oring TP – Pollutant Transport TR – Trend Analysis EX – Population Exposure CP – Site Comparisons SO – Source Impact

Location CO NO2 SO2 O3 PM10 PM2.5 Pb Anaheim TR TR/RC TR TR TR/EX Azusa TR TR/RC TR TR TR/EX Banning Airport TP/RC TP TP Big Bear EX/SO/TP Burbank TR TR/RC TR TR TR TR/EX Compton 3 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 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 ( Anaheim St ) 1 Long Beach ( Hudson ) Long Beach ( North ) 6 HC TR/RC TR/HC TR TR/RC EX/HC EX Los Angeles ( Main St. ) SO/RC SO/HC TR TR/RC TR/RC EX/HC EX Lynwood 2 TR/HC TR/RC TR/RC EX/RC EX Mira Loma ( Jurupa ) 4 TP/RC TP/RC TR/RC HC/CP Mira Loma ( Van Buren ) CP CP CP HC/CP CP Mission Viejo RC TR/RC TR/RC EX/RC Norco TR/RC Ontario Fire Station HC EX/RC Palm Springs TP/RC TP/RC TP TP/RC 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 Reseda RC TR/RC HC EX/RC Riverside 5,6 HC TR/RC EX/RC EX Rubidoux TR/RC TR/RC TR TR/HC TR/HC EX/TR/HC EX San Bernardino 6 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 Temecula 1 Upland RC TR/RC TR/RC EX West Los Angeles RC TR/HC RC

1 Site to begin operation in Fiscal Year 2009-2010

2 Site closed 10/30/08

3 Site replaced Lynwood AMS 11/05/08

4 Site to be closed Fiscal Year 2009-2010

5 NO 2 installed as SPM on 10/02/08

6 Pb to be discontinued FY 2009-2010Air Quality Monitoring Network Plan – July 2009

18 TABLE 4. Continuous PM 10 /PM 2.5 Monitoring Purpose, Objective and Spatial Scales

MONITORING OBJECTIVE SPATIAL SCALE TYPE HC – High Concentrations MI – Microscale BAM (NON-FEM) RC – Representative Concentrations NS – Neighbor hood Scale TEOM BAM (FEM)

MONITORING PURPOSE SO – Source Impact RM – Real-Time Reporting/Mo deling TP – Pollutant Transport SPM – Special Purpose Mo nitoring TR – Trend Analysis

Location Continuous PM10 Continuous PM2.5
Type Purpose Objective Scale Type Purpose Objective Scale

Anaheim 1 TEOM RM RC NS BAM/FEM SPM RC NS Banning Airport BAM/NON-FEM RM RC NS
Burbank 1 TEOM RM RC NS BAM/FEM SPM RC NS
Crestline 3 BAM/NON-FEM RM
Glendora TEOM RC NS BAM/NON-FEM RM RC NS
Indio 5 BAM RM HC NS
Lake Elsinore TEOM RC NS BAM/NON-FEM RM RC NS Long Beach ( Anaheim St ) 4 Long Beach ( Hudson ) Long Beach ( North ) 1 TEOM RC MI BAM/FEM SPM Los Angeles ( Main St. ) 1,5 BAM RM RC NS BAM/FEM SPM HC NS Mira Loma ( Jurupa ) 6 TEOM RM HC NS RC NS Mira Loma ( Van Buren ) 1 BAM/FEM SPM RC NS Palm Springs 5 BAM RM HC NS
Reseda 2 BAM/NON-FEM
Riverside 3 BAM/NON-FEM RM
Rubidoux 1 TEOM RM HC NS BAM/FEM SPM HC NS
San Bernardino TEOM RM RC NS
Santa Clarita 2 BAM/NON-FEM RM South Long Beach 1 BAM/FEM SO/RM/SPM RC NS
Temecula 3,4 BAM/NON-FEM RM Upland 3 TEOM RM RC NS BAM/NON-FEM RM

1 FEM BAM Samplers replaced NON-FEM Samplers during FY 2008-2009 and designated as special purpose monitors

2 NON-FEM BAM Samplers deployed during Fiscal Year 2 008-2009
3 NON-FEM BAM Samplers to be deployed during Fiscal Year 2009-2010

4 Site planned during Fiscal Year 2009-2010

5 To be replaced with TEOM Fiscal Year 2009-2010

6 To be closed Fiscal Year 2009-2010Air Quality Monitoring Network Plan – July 2009

19 TABLE 5. PM 2.5 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 1 AZUS 70060 060370002 01/04/99 1-in-3 Big Bear BGBR 36001 060718001 02/08/99 1-in-6
Burbank 2 BURK 70069 060371002 01/21/99 Daily Compton 3 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
Indio “B” INDI 33157 060652002 05/12/00 1-in-6 Long Beach ( Anaheim St. ) TBD 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 Lynwood 4 LYNN 70084 060371301 01/03/99 1-in-3 Mira Loma (Van Buren) 2 MRLM 33165 060658005 11/09/05 Daily 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

1 Change to 1-in-3 on 04/16/09

2 Change to daily on 04/16/09 for comparison to FEM BAM
3 Replaced Lynwood AMS on 11/05/08

4 Site closed 10/30/08Air Quality Monitoring Network Plan – July 200920TABLE 6. PAMS Proposed NetworkJuly 1 to September 30October 1 to June 30SiteTypeDateEstablished asPAMSSite / AQS ID#VOCCarbonylVOCCarbonylAdditionalRequirements1 04/01/2004LAX Hastings(replacedHawthorne)8 x 3 hr samples every 3rdday and 1 x 24 hr sampleevery 6thdayNo Sampling1 x 24 hr sampleevery 6thdayNo Sampling2 06/01/1995 Azusa8 x 3 hr samples every 3rdday and 1 x 24 hoursample every 6thdayNo Sampling1 x 24 hr sampleevery 6thdayNo SamplingNo/NOx requiredTrace level CO required2 07/01/1997 BurbankContinuous GC and 1 x24 hr sample every 6thday8 x 3 hr samples everyday and 1 x 24 hrsample every 6thday1 x 24 hr sampleevery 6thday1 x 24 hr sampleevery 6thdayTrace level CO required2 06/01/2009 Los Angeles (Main)8 x 3 hr samples every 3rdday and 1 x 24 hoursample every 6thday8 x 3 hr samples every3rdday and 1 x 24 hrsample every 6thday1 x 24 hr sampleevery 6thday1 x 24 hr sampleevery 6thdayTrace level CO required2 08/01/2005 Pico Rivera #2Continuous GC and 1 x24 hr sample every 6thday8 x 3 hr samples everyday and 1 x 24 hrsample every 6thday1 x 24 hr sampleevery 6thday1 x 24 hr sampleevery 6thdayTrace level CO required3 06/09/2009 Rubidoux8 x 3 hr samples every 3rdday and 1 x 24 hoursample every 6thdayNo Sampling1 x 24 hr sampleevery 6thdayNo Sampling NOy required3 05/01/2001 Santa Clarita8 x 3 hr samples every 3rdday and 1 x 24 hoursample every 6thday8 x 3 hr samples 3rddayand 1 x 24 hr sampleevery 6thday1 x 24 hr sampleevery 6thday1 x 24 hr sampleevery 6thdayMONITORING OBJECTIVES: MONITORING REQUIREMENTS: REDUCED REQUIREMENTS:1 – Upwind and background characterization siteOne 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 ozone precursor emissions impact siteOne type 2 site required per area Carbonyl only required in areas classified as serious or above 8 hr zone3 – Maximum ozone concentration site Notype 4 required NO/NOx required only at type 24 – Extreme downwind monitoring siteNOy required at one site per PAMS area (type 1 or 3)