# SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

ANNUAL AIR QUALITY MONITORING

NETWORK PLAN

Ju ly

, 201 3

Prepared by

Rene M. Bermudez Principal Air Quality Instrument Specialist

Jason Low Atmospheric Measurements Manager

### Air Quality Monitoring Network Plan

– July 2013

i 

# Table of Contents

Page

Introduction 1

Public Comments 1 Network Design 1 Special Programs 1 8 Recent or Proposed Modifications to Network 20 Minimum Monitoring Requirements Data Submittal and Archiving Requirements 33

40

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 Monit oring Locations A

- 6

 PAMS Monitoring Locations A

- 7

 PM2.5 Monitoring Locations A

- 8

Appendix B: Detailed Site Information Appendix C: 

### PM2.5 Continuous Monitor Comparability Assessment

and Request for Waiver

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1 

# INTRODUCTION

An ann ual 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 ( SCAQMD ) . It includes a review of actions taken during the 20 12

- 20 13 fiscal year and plans for action in the year ahead. This plan addresses the requ irement 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 Agenc y (EPA) by July 1 of each year after a 30 day public comment period.

The SCAQMD 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 Moni toring Stations (SLAMS) designations, site type

, 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 20 10 to conduct a comprehensive Technical System Audit (TSA) of the ambient air monitoring network. Each year, SCAQMD staff conducts an annual revie w of its air monitoring

network and submits it to the EPA. The review process focuses on current and future ne twork air monitoring strategies and network changes are made in consultation with the E PA and CARB.

When re

- location of monitoring sites are required, site re ports 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 fo r public inspection and comment

for a period of 30 days prior to submission of the final plan to EPA. Hard copies of the final

document are made available on July 1, 201 3 at the SCAQMD ’s Public Information Desk in Diamond Bar, CA. The document is also available on the SCAQMD as of May 15, 2 013 in the drop down menu under the “Community”, “Air Quality” and “Air Monitoring Network Plan.” ( http://www.aqmd.gov/tao/AQ

- Reports/AQMonitoringNetworkPlan/AQnet workplan.htm )

. The

f inal document is submitted to the EPA on July 1, 201 3 along with any public comments

received to fulfill Fe deral regulatory requirements.



## Network Design

The SCAQMD operates 3 5 permanent, multi

- pollutant monitoring stations , and 5 sin gle

pollutant source impact 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 pe rmanent site

was added during June 2010 to monitor Ozone (O3) and continuous PM 2.5 for the Temecula

area

. T he newest source Pb sites were added in January 2010 as required by EPA regulation.

T he 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

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– July 2013

2 codes, and the pollutants measured at each site. Table 2 provides the spatial scale and the site

type for each monitor at al l sites

.

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

type, spatial scale and monitoring purpose for continuous particulate analyzers at each site. A new requirement of the annual network plan implem ented in 2007, the monitoring purpose is the reason why a certain pollutant is being measured at a certain site.

A list and description of monito ring purposes are provided below and portions are adapted from the CARB annual network plan for 2007.

Back ground Level monitoring is use d 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 monitorin g 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 use d to assess and mitigate upwind areas when transported pollutant affects neighboring downwind areas. Also, transport monitoring is use d to determine the extent of regional pollutant transport among populated areas and to rural

areas.

Population Exposure moni toring 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 geo graphical 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 am bient air quality. The air pollutant sourc es 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 l onger 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.

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3 Real Time Repo rting/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.

Multiple purposes for measuring a pollutant at a particular site are possible. There is some overlap between site type and monitoring purposes as defined by EPA and given in Tables 2, 3

, and 4

.

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4 TABLE 1

. List of Monitoring Sites

Location AQS No. Pollu tants 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 Burba nk 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,P M10,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

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5 TABLE 2

. FRM/FEM Criteria Pollutant Sp atial Scales and Site Type

SPATIAL SCALE SITE TYPE

MI

– Microscale HC

– Highest Concentration

MS

– Middle Scale PE

– Population Exposure

NS

– Neighborhood Scale IM

– Source Oriented (Impact)

US

– Urban Scale BK

– General Background

Location CO NO2 SO2 O 3 Manual

PM10 Manual

PM2.5 Pb

Anaheim NS/ PE US/ PE NS/ PE NS/ PE NS/ PE ATSF (Exide) MI/IM

Azusa NS/ PE US/ PE US/HC NS/ PE NS/ PE Banning Airport NS/ PE NS/ PE NS/ PE Big Bear NS/ PE

Burbank NS/HC NS/ PE NS/ PE US/HC NS/ PE NS/ PE

Closet World ( Quemetco ) MI/IM Compton MS/HC MS/ PE NS/ PE NS/ PE NS/ PE

Costa Mesa NS/ PE NS/ PE NS/ PE NS/ PE

Crestline NS/HC NS/ PE

Fontana NS/ PE US/ PE NS/ PE US/ PE NS/HC NS/ PE

Glendora NS/ PE NS/ PE NS/HC

Indio NS/ PE NS/HC NS/ PE

La Habra NS/ PE US/ PE NS/ PE

Lake Elsinore NS/ PE NS/ PE NS/ PE LAX Hastings MS/ PE /B K MS/

PE /B K NS/

PE /B K N S/

PE /B K NS/

PE /B K NS/ PE /B K Long Beach ( North ) MI/HC MS/ PE NS/HC N S/ PE MI/ PE NS/HC MI/ PE Los Angeles (Main St.) NS/ PE NS/HC NS/ PE NS/ PE NS/ PE NS/HC NS/ PE

Mira Loma ( Van Buren ) NS/ PE NS/ PE NS/ PE NS/HC NS/HC Mission Viejo NS/ PE NS/ PE NS/ PE NS/ PE

Norc o NS/ PE

Ontario Fire Station NS/HC NS/ PE Palm Springs NS/ PE NS/ PE NS/ PE NS/ PE NS/ PE

Pasadena MS/ PE MS/HC NS/ PE NS/ PE

Perris NS/ PE NS/ PE

Pico Rivera #2 NS/ PE NS/HC NS/HC NS/ PE NS/ PE

Pomona MI/ PE MS/ PE N S/HC

Redlands NS/ PE NS/ PE Rehrig (Exide) MI/IM

Reseda NS/ PE US/ PE US/HC NS/ PE

Riverside MI/HC US/ PE NS/HC MI/HC

Rubidoux N S/ PE US/ PE NS/ PE US/HC NS/HC NS/HC NS/ PE

San Bernardino MS/ PE US/ PE NS/HC NS/HC NS/ PE NS/ PE

Santa Clarita NS/ PE NS/ PE US/HC NS/ PE NS/ PE South Long Beach NS/HC NS/ HC NS/HC

Temecul a NS/HC Uddelholm ( Trojan Battery ) MI/IM Upland NS/ PE NS/ PE NS/ PE NS/ PE Van Nuys Airpor t MI/IM West Los Angeles NS/ PE MS/HC N S/ PE

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6 TABLE 3

. FRM/FEM Criteria Pollutant Monitoring Purposes

MONITORING PURPOSE

BK

– Background RC

– Representative Concentration

HC

– High Concentration RM

– Real

- Time Reporting/Modeling

TP

– Pollut ant 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/H C EX/TP

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

Perr is 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 Bernar dino 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

Temecula 2 TR/HC Upland RC TR/RC TR/RC EX Van Nuys Airport SO West Los Angeles RC TR/HC RC

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7 TABLE 4

. Continuous PM 10 

### /PM 2.5 

### Monitoring Purpose, Site Type and Spatial Scales

SITE TYPE SPATIAL SCALE INSTRUMENT TYPE

HC

– High Concentration MI

– Microscale TEOM

PE

– Population Exposure NS

– Neighborhood Scale BAM (NON

- FEM)

B K

- 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 Continu ous PM10 Continuous PM2.5

Type Purpose Site Type Scale Type Purpose Site Type Scale

Anaheim BAM /FEM RM /TR PE NS BAM/FEM RM/TR PE NS
Banning Airport BAM/NON

- FEM RM PE NS

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

Crestline BAM/NON

- FEM RM PE NS

Glendora BAM /FEM RM PE NS BAM/NON

- FEM RM PE NS

Indio TEOM /FEM RM HC NS

Lake Elsinore TEOM /FEM RM PE NS BAM/NON

- FEM RM PE NS
Long Beach ( North ) BAM /FEM RM /TR PE NS BAM/FEM RM HC NS
Los Angeles ( Main St. ) BAM /FEM RM /TR PE NS BAM/FEM RM HC NS

Mira Loma ( Van Buren ) BAM /FEM RM HC NS BAM/FEM RM HC NS
Palm Springs TEOM /FEM RM /TP HC NS

Reseda BAM/NON

- FEM RM PE NS

Riverside BAM /FEM RM HC NS BAM/NON

- FEM RM HC NS

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

NON

- FEM RM /TR/CO HC NS

San B ernardino TEOM /FEM RM /TR HC NS

Santa Clarita BAM/NON

- FEM RM PE NS
South Long Beach BAM/FEM RM/SO PE NS

Temecula BAM/NON

- FEM RM PE NS
Upland BAM /FEM RM PE NS BAM/NON

- FEM RM PE NS

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8 A brief description of the criteria polluta nt and program monitoring networks are provided

below:

OZONE (O3)

The SCAQMD operates 29 sites where O3 measurements are made as part of the Air Monitoring Network. O 3 sites are spread through ou t the SCAB with highest

concentrations me a sured inland. Figu re 1 in Appendix A shows the spatial distribution of

these sites and Table 16 shows the minimum monitoring requirements

.

PM10

Size

- selective inlet manual high volume samplers are operated at 21 sites to meet the requirements for PM10 Federal Reference Meth od ( FRM ) sampling . The Indio

, Ontario,

and Rubidoux sites are designated as collocated sites as shown in the particulate collocation requirements, Table 24

. All PM 10 FRM monitors operate on a one day in six day schedule, with the exception of Indio and R ubidoux which operate on one day in three day schedule.

PM 10 continuous analyzers are operated at 13 sampling sites . These real

- time devices are capable of making hourly particulate concentration measurements. Table 4 describes the monitor type, site ty pe
, monitoring purpose, and spatial scale for continuous parti culate analyzers. F igure 2 in Appendix A shows the spatial distribution of the sampling sites and Table 18 shows the minimum monitoring requirements . 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 exceedances of the twenty

- four hour s tandard during exceptional events . In downwind areas of the SCAB , a large fraction of particu late is formed in the atmosphere; PM 10 reaches maximum levels during late summer through early winter months.

Where both 24 hour PM10 FRM samplers and PM10 FEM continuous analyzers are deployed together, they are sited as collocated for data comparison purposes. The 24 hour FRM PM10 sampler remains the primary analyzer used for attainment purposes.

NITROGEN DIOXIDE (NO2)

The area wide NO 2 network consists of 25 sites . These sites are mostly located in areas of highest NO 2 concentration. The spatial d istribution of NO 2 monitors is shown in Figure 3 in Appendix A and minimum monitoring requirements are shown in Table 19

. Additionally, t he Regional Administrator identified 40 NO2 sites nationwide with a primary focus on siting these monitors in location s to protect susceptible and vulnerable populations. The Regional Administrator in collaboration with SCAQMD indentified the Los Angeles (Main), Long Beach (North) and San Bernardino sites from the existing area

wide monitoring network to meet this require ment (58.10[a][5])

. Review of 1992 through

2012 NO2 data shows the State and Federal standards for NO2 were not exceeded.

On February 9, 2010 EPA promulgated new minimum monitoring requirements for NO2 which require state and local agencies to install near road monitoring sites. On March 7, 2013 EPA revised the Ambient Nitrogen Dioxide Requirements postponing near road

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9 monitoring site implementation until January 1, 2014. The plan for the implementation of

the near road network is detailed in the sect ion titled, “Recent or Proposed Modifications

to Network.”

CARBON MONOXIDE (CO)

Area wide CO monitors measure concentrations at 2 2 locations and microscale measurements are taken at 3 locations within the SCAQMD ambient air monitoring

network . Figure 4 i n Appendix A shows the spatial distribution of these sites

. CO emissions, primarily from motor vehicles, show a pattern consistent with major freeway

arteries. A review of data for 201 2 shows State and Federal standards for CO were not

exceeded.

On Aug ust 31, 2011 EPA issued the Final Rule for the Review of National Ambient Air Quality Standards for CO. EPA revised the minimum requirements for CO monitoring by requiring CO monitors to be sited near roads in certain urban areas. EPA is requiring one CO

monitor to be collocated with a subset of near road NO2 monitors. Specifically, EPA is requiring the collocation of one CO monitor with a near road NO 2 monitor in urban areas having populations of 1 million or more. EPA is specifying that monitors requi red in 

### C ore
B ased Statistical A rea s ( CBSA ) of 2.5 million or more persons be operational by January 1,

2015.

One near road CO monitoring site is required in each of the 

### Los Angeles

- Long Beach

- Santa

Ana MSA \ CBSA (Code 31100) and the Riverside

- San Bernard ino

- Ontario MSA \ CBSA (Code 40140) areas. Near road CO monitoring is to be implemented concurrently with the near road NO2 monitoring network and o perational by January 1, 2015. Minimum monitoring requirements are shown in Table 21

.

SULFUR DIOXIDE (SO2)

S O2 monitors are located at 7 sites

. Figure 5 in A ppendix A shows the spatial distribution

of the sites. Most SO 2 emissions come from F ederal transportation sources such as marine

vessels . The monitors are clustered mostly in the areas where these source s 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 c alculated by States for each 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 curre nt 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 with in that

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10 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 and f

or 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.

TABLE 5. PWEI Calculation and Minimum Required SO2

SCAQMD exceeds the minimum requirement for SO2 monitors; t he F ederal standard has

not been exceeded for nea rly 3 3 years.

P ARTICULATE LEAD

Total Suspected P articulate (TSP) Pb measurements are collected at 1 5 sites as part of the network; 5 of the sites are Source Impact for Pb, and the remaining 10 sites measure ambient Pb, and S ulfates ( SO 4)

. 

### There are 2 additional sites wh ich me asure SO4 only

which are under consideration for removal since ARB delet ed the TSP SO4 method, ARB method MLD 033, and replaced it with the existing ARB method and creating a new

standard for PM10 SO4 , ARB method MLD 007

.

The Rehrig (Exide) site mea sures the highest Pb concentrations in the monitoring network. Upon review of data (2010

- 2012) Rehrig (Exide) Pb monitoring site measured 0 .46 ug/m3 as a 3 month rolling average. The Rehrig (Exide) monitoring location h as been designated

as a collocated monitoring location along with the Long Beach, Los Angeles , and

Riverside sites as shown in the minimum monitoring requirements

, Table 24

. The spatial

distribution of these sites is shown in Figure 6 in Appendix A

.

In 1990, the EPA requested that the SC 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 F ederal 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 wa s closed. Out of the two facilities currently being monitored, the facility in the C ity of Vernon exceeded the old F ederal 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

. N etwork design requirements include d monitoring for sources of Pb (s ource oriented monitoring)

and urban Pb monitoring (non

- source oriented). To meet this requirement, a source oriented site w as 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

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11 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

ne ed for continued monitoring based upon conditions as cited in 40 CFR 58 Appendix D

4.5.

The most recent NEI data available shows the Long Beach A irport, Daugherty Field (NEI 2008, Version 2 http://www.epa.gov/ttn/chief/net/2008inventory.html ) just over the requirement for Pb source monitoring at 1.02528004 tpy. As part of the MATE S IV

program , SCAQMD is conducting a preliminary study to determine the need for long term Pb source monitoring at the Long Beach Airport. The study is expected to be completed and assessment conducted by the end of 2014. A determination will be made in consultation with EPA Region IX on th e need for long term monitoring at the time of the 5 year network assessment in 2015.

Photochemical Assessment Monitoring Stations

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

June 19 94 at Pico Rivera and Upland . During 1995 sites were established at Banning and

Azusa to determine speciated hydrocarbon O 3 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 on e 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 O 3 m onitoring activities that may prove useful.

To address regulatory changes, site

- specific observations from the PAMS network assessment project, and potential synergies between programs, SCAQMD made the following changes in June 2009 to the PAMS monitorin g network:

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12  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

urbaniz ed/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

Ne t work Assessment observed that Santa Clarita was consistent with a Type 2 site,

recen t 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, SCAQMD relocated the Banning PAMS site to the Los Angeles (Main) site as Type 2. This satisfies the EPA recommendation for use of the same

m onito r ing 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.

 A zusa 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. T he 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

reco m mended reclassification to Type 3. SC 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 Azus a, LAX Hastings, Rubidoux, Los Angeles (Main)

, and Santa Clarita air monitoring stations. During the intensive season from July 1 until Se p tember 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 f rom 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.

Automated G as Chromatography F lame I onization D etector (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

### Air Quality Monitoring Network Plan

– July 2013

13 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 th e 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 co n ducted by the EPA, which asse ssed the SCAQMD NATTS/PAMS program s . The audit found no major issues with the operation

of the network bu t recommended implement a tion 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 and are completed annually

.

The first SCAQMD 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 combin ation of remote sensing and surface meteorological instrumentation, including the Scintec (formerly Radian/URS and Vaisala ) LAP

- 3000 radar wind profiler with a Radio Acoustic Sounding System (RASS), the Atmospheric Systems Corporation (formerly

AeroVironme nt Inc.) mini Sodar acoustic wind profiler, and tower

- mounted meteorological measurements of wind, pressure, temperature, relative humidity, solar radiation, and ultraviolet radiation. Due to the age of the LAX upper air instrumentation and costly compone nt failures, SCAQMD is proposing to replace the LAX instrumentation with the Whiteman Airport systems, thereby closing the Whiteman upper air station.

The PAMS network monitoring objectives and requirements are summarized in T able 6

, Table 23 and Figure 7 in Appendix A shows the distribution of the PAMS network.

### Air Quality Monitoring Network Plan

– July 2013

14 TABLE 6. PAMS 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 Hasti ngs (replaced Hawthorne) 8 x 3 hr samples every 3 rd

day and 1 x 24 hr sample every 6 th day No Sampling 1 x 24 hr sample every 6 th day No Sampling

2 06/01/1995 Azusa 8 x 3 hr samples every 3 rd
day and 1 x 24 hour sample every 6 th day No Sampling 1 x 24 hr sample every 6 th day No Sampling No/NOx required

2 07/01/1997 Burbank Continuous GC and 1 x 24 hr sample every 6 th
day 8 x 3 hr samples every day and 1 x 24 hr sample every 6 th day 1 x 24 hr sample every 6 th day 1 x 24 hr sample

every 6 th day

2 06/0 1/2009 Los Angeles (Main) 8 x 3 hr samples every 3 rd
day and 1 x 24 hour sample every 6 th day 8 x 3 hr samples every

3 rd day and 1 x 24 hr sample every 6 th day 1 x 24 hr sample every 6 th day 1 x 24 hr sample

every 6 th day Trace level CO required

at one typ e 2 site.

2 08/01/2005 Pico Rivera #2 Continuous GC and 1 x 24 hr sample every 6 th
day 8 x 3 hr samples every day and 1 x 24 hr sample every 6 th day 1 x 24 hr sample every 6 th day 1 x 24 hr sample

every 6 th day

3 06/09/2009 Rubidoux 8 x 3 hr samples ev ery 3 rd
day and 1 x 24 hour sample every 6 th day No Sampling 1 x 24 hr sample every 6 th day No Sampling NOy required

3 05/01/2001 Santa Clarita 8 x 3 hr samples every 3 rd
day and 1 x 24 hour sample every 6 th day 8 x 3 hr samples 3 rd day and 1 x 24 hr samp le every 6 th day 1 x 24 hr sample every 6 th day 1 x 24 hr sample

every 6 th day

MONITORING OBJECTIVES : MONITORING REQUIREMENTS : REDUCED REQUIREMENTS : 1

– Upwind and background characterization site One type 1 or type 3 site required per area Speciate d 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 typ e 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 2013

15 P M2.5
A network of 17 FRM samplers was first implemented in January 1999. On December 26, 1999, a second Coac hella 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 7

. 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)

. M anual PM2.5 monitors are neighborhood scale and population exposure representing community wide a ir quality and multiple sites ar e listed as population exposure. Because all of SCAQMD is in non

- attainment for PM2.5, most of the sites are in areas of poor air quality therefore multiple sites are listed as population exposure and high concentration. I f a PM2.5 network modification were to be implemented for a site that was in exceedence of the of the PM2.5 NAAQS levels, SCAQMD would notify US EPA Region IX via written communication. Public notice occurs as part of the annual network plan process with is stated in the annual network plan. All sites in the Network using FRM samplers are suitable for comparison against the annual PM2.5 NAAQS.

During April 2009, SCAQMD 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 1

- in

- 3 day schedule and the Azusa location changed from every day sampling to 1

- in

- 3 day s ampling. 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 ( FEM & Non FEM BAM ), and one each at Anaheim, Los Angeles, South Long Beach, Burbank, Mir a Loma (Van Buren), and Banning sites. 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 NON

- FEM BAM sampler was deployed at Temecula during July, 2010

. In 2011

, all FEM BAMs have been reclassified from special pu rpose monitors to SLAMS under 40 CFR § 58.20

. In 2013, SCAQMD

conducted a PM2.5 Continuous Monitor Comparability Assessment (Appendix C) i n accordance with the PM NAAQS rule published on January 15 th 

### , 2013 (78 FR 3086).

S pecific to the provisions detaile d in §58.10 (b)(13) and §58.11 (e)

, the assessment results

indicate that all of the SCAQMD PM2.5 Continuous Monitors do not meet the criteria to be compared against the NAAQS currently. Thus, SCAQMD is requesting a waiver to

exclude PM2.5 continuous monit or data from NAAQS comparison (Appendix C). At such

### Air Quality Monitoring Network Plan

– July 2013

16 time when the assessment indicates that the FEM monitors are with the acceptance criteria,

then U.S. EPA will be notified of the results and the AQS parameters will be changed to

indicate that the data wi ll be eligible for comparison to the NAAQS upon U.S. EPA approval.

Where both 24 hour FRM PM2.5 samplers and FEM PM 2.5 continuous analyzers are deployed together

, they are sited as collocated for data comparison purposes if the FEM analyzer meets the acc eptance criteria under 78 FR 3086

. The 24 hour

TABLE 7 . Manual 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 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 ( Nort h ) 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” M RLM 33165 06065 8005 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 River a #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



### FRM PM2.5 s ampler remains the primary analyzer used for attainment purposes and continuous analyzers are designated as audit samplers unless the primary 24 hour FRM

P M2.5 is offline then c ontinuous FEM analyzer data can be substituted if the FEM analyzer meets the acceptance criteria under 78 FR 3086

.

PM2.5 speciation sampling is also a part of the SCAQMD PM2.5 program. Collocated

S TN and one SCAQMD Met One SASS P M2.5 samplers were deployed in March 2001 at

Rubidoux. An additional STN and collocated SCAQMD SASS samplers were deployed at Central Los Angeles in 2002. In 2003, SCAQMD SASS PM2.5 speciation samplers were

### Air Quality Monitoring Network Plan

– July 2013

17 installed at Fontana and Anaheim air monitorin g sites. Analysis of the filters from the ambient network SASS samplers are being conducted at SCAQMD ’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.

On December 14 , 2012 EPA revised NAAQS for PM2.5. As part of the revision EPA updated monitoring requirements for PM2.5 including the addition of monitoring near heavily traveled roads in large urban areas. Specifically, EPA is requiring the colloc ation of one PM2.5 monitor with a near road NO2 or CO monitor in urban areas having populations of 1 million or more. EPA is specifying that monitors required in CBSAs of 2.5 million or more persons are to be operational by January 1, 2015. One near road PM2.5 monitoring site is required in each of the Los Angeles

- Long Beach

- Santa Ana

MSA \ CBSA (Code 31100) and the Riverside

- San Bernardino

- Ontario MSA \ CBSA (Code 40140) areas. Near road PM2.5 monitoring is to be implemented concurrently with the

near road NO2 monitoring network and operational by January 1, 2015.

Natio nal A ir Toxics Trends Station (NATTS)
The NATTS program was developed to fulfill the need for long

- term H azardous A ir

P ollutant (HAP) monitoring data of consistent quality nationwide. SCAQM D 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

me a surement site cannot reflect the levels and trends of air toxics throug hout 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 emi s sions. A se cond, more rural, inland site at Rubidoux captures the transport 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 Los Angeles (M ain) and Rubidoux air monitoring sites. During April 2010, a system audit was co n ducted by the EPA, which assessed the SCAQMD NATTS program. The audit found no major issues with the operation of the network but recommended implement a tion 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 and completed annually.

NCore
NCore monitoring rules require that SCAQM D make NCore sites operational by January

1 st 

### , 2011. To meet this goal, SCAQMD installed t race level analyzers for CO, NOY and

SO2 at the Rubidoux and Central Los Angeles sites. Continuous PM10 and PM2.5 BAM

are utilized for PM10

- PM2.5 measurements at both 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.

### Air Quality Monitoring Network Plan

– July 2013

18 

## Special Programs

Special monitoring pro grams 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 seventeen 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, SCAQMD conducted the first MATES study to

determine the SCAB

- wide risk s 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 measuremen t 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 pollutant s. In April 2004, the SCAQMD 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 SCAQMD began MATES IV.

The objective of MATES IV is to characterize t he 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 update d toxics emissions inventory and conduct air dispersion modeling to estimate ambient levels and the potential health risks of air toxics. 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 heal th 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 inc lude 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 monitor ing platforms are to be deployed for short term deployments at six to eight

sites to include communities with varying land type usage

.

### Air Quality Monitoring Network Plan

– July 2013

19 Fugitive Dust Study In support of SCAQMD 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 pr oducing large volumes of dust.

Hexavalent Chrome

The SCAQMD has an on going 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 SCAQMD jur isdiction.

College of the Desert

Because exceedances of the standard PM 10 have been recorded at the Torres

- Martinez (Indian Reservation) station, SCAQMD is conducting an independent monitoring study to

evaluate the spatial representativeness of such measu rements. A continuous PM10 monitor

was set

- up near “College of the Desert” on 12/07/10 where measurements continue to be

taken. The College of the Desert monitor may be relocating to consolidate monitoring efforts in the Coachella Valley to Saul Martinez Elementary School.

GERDAU

- TAMCO GERDAU North America acquired the TAMCO Rancho Cucamonga steel mini mill in October, 2010. In 2012 Environ Corp. was retained to perform an environmental audit and found discrepancies in reported emissions. Environ found that SOx emissions were not accurately reported prior to 2011, NOx emissions were not accurately being measured and

Pb emissi ons may contribute to an exceede nce of the NAAQS. SCAQMD conducted inspections of the facility to address issues and continues m onitoring for Pb and Cr+6 at the facility. If results of the monitoring effort show TAMCO as a source of Pb that could contribute to an exceedence of the NAAQS, it will be added to the source impact Pb monitoring network.

Salton Sea Monitoring On Sunday September 9, 2012, a strong thunderstorm over the Salton Sea caused odors to be released and transported to the northwest, across the Coachella Valley and through the Banning Pass into the SCAB . The odors also crossed through the mountain passes west of

th e Salton Sea and into the Temecula Valley. The following day, SC AQMD received over 235 complaints of sulfur and rotten egg type odors

As the Salton Sea recedes, potential for more of these large

- scale odor events to occur in

the future increases. SC AQMD i s in the process of establishing an air monitoring network to monitor the type of expected nuisance pollutants which are released from the Salton Sea area. The primary objective of this monitoring network is to place monitoring resources at

a lakeside loca tion where peak hydrogen sulfide concentrations are expected to occur. The monitoring sites will provide data that can be used to assess population exposures in case of odor events and for comparison to the state standard for hydrogen sulfide

.

### Air Quality Monitoring Network Plan

– July 2013

20 As the S alton Sea is projected to recede, these sites could be enhanced for monitoring the predicted particulate matter (PM) emissions from the Salton Sea area that may influence

the South Coast Air Basin PM levels.



## Recent or Proposed Modifications to Network

Ne ar 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 environment in larger urban areas. On March 7, 2013 EPA revised the new mo nitoring requirements from the 2010 NO2 NAAQS

revision

, delaying implementation of the first phase of the near road network to January 1, 2014 and the second phase to January 1, 2015. As part of the implementation, State and local air agencies are require d 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 are to be operational by January 1, 2014 and Phase II sites are to be operational by January 1, 2015. Each phase consists of one site selected from each of the Los Angeles

– Long Beach

– Santa Ana (Metropolitan Statistical Area (MSA) and the Riverside

– San Bernardino

– Ontario MSAs.

The primary objective of the near

- road NO2 network is to place monitoring resources on near

road locations where peak, ambient NO2 concentrati ons 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, the target mobile sources and the roads they travel upon are ubiquitous throughout urban areas, these monitoring data may be said to represent the re lative worst case population exposures that may be occurring in the near

- road environment throughout an urban area over the averaging times of interest.

Minimum monitoring requirements are specified in 40 CFR 58 Appendix D. EPA requires state

and local a ir agencies to operate one near

- road NO2 monitor in each Core Based Statistical Area (CBSA) with a population of 500,000 or more persons. Further, those CBSAs with 2,500,000 or more persons, or those CBSAs with one or more roadway segments carrying traffic volumes of

### Air Quality Monitoring Network Plan

– July 2013

21 250,000 or more vehicles (as measured by annual average daily traffic [AADT] counts), shall

have two near

- road NO2 monitors. The process of identifying minimum monitoring requirements is shown in Figure A

.

The SCAQMD juris dictional 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 Figure A

. Monitoring Requirements

### Air Quality Monitoring Network Plan

– July 2013

22 and Budget. The Los Angeles

- Long Beach

- Santa Ana MSA \ CBSA (Code 31100) has an estimated population of 13, 052,921 and the Riverside

- San Bernardino

- Ontario MSA \ CBSA (Code 40140) has an estimated population of 4,350,096 according to U.S. Census estimates for 2012. The minimum number of monitors required for near road monitoring is based on

MSA \ CBSA population a nd shown in Table 8

.

TABLE 8

. Minimum Number of Monitors Required Near Road NO2

The monitoring site selection process was in accordance with guidance published in the U.S.

EPA D raft Near Roadway NO2 Technical Assistance Document (TAD) (December, 2011). The process for ranking candidate road segments is outlined in Figure B.

### Air Quality Monitoring Network Plan

– July 2013

23 The candidate road segment ranking process incorporated the following EPA TAD

considerations:

FE AADT

– A s ingle metric to compare road segments, accounting for AADT and f leet mix (Heavy Duty Vehicles). The 

### Fleet

- Equivalent AADT value for each road segment is calculated by the following formula:

(FE) AADT = (AADT

– HDc) + (HDm * HDc)

Where AADT is the total traffic volume count for a particular road segment, HDc is the total number of heavy

- duty vehicles for a particular road segment, and HDm is a multiplier that represents the heavy

- duty to light

- duty NOx emission ratio for a particular road segment. An HDm of 17 was used instead of the default national average of 10 based on emissions inventories within the SCAQMD jurisdiction (Air Quality Management Plan, South Coast Air Quality Management District, 2012). The top 15 FE AADT segment candidates are shown in Table 9

.

Figure B

– Ranking Candidate Road Segments

### Air Quality Monitoring Network Plan

– July 2013

24 TABLE 9

. Top Fifteen FE AADT Candidate Roadway Seg ments

FE

ADDT

Rank HD

Rank AADT

Rank FE

AADT AADT

Total Total

Trucks (HD) Total

Truck

% County Post

mile Route
Description

1 20 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 9.61 2 605 SANTA FE SPRINGS, JCT. RTE. 5, SANTA ANA

3 11 32 695,776 272,000 25,840 9.5 ORA 38.915 5 LINCOLN AVENUE

4 4 51 690,111 248,000 26,958 10.87 LA 13.569 605 WHITTIER, JCT. RTE. 72, WHITTIER BOULEVARD

5 21 14 685,400 299,000 23,561 7.88 LA 7.653 605 N ORWALK, JCT. RTE. 105, GLENN ANDERSON

FREEWAY

6 53 3 679,014 357,000 19,635 5.5 ORA 34 5 SANTA ANA, JCT. RTES. 22 AND 57, GARDEN

7 9 59 667,843 240,000 26,088 10.87 LA 17.407 605 INDUSTRY, JCT. RTE. 60, POMONA FREEWAY I

8 2 76 667,637 222,000 27,173 12. 24 SBD 4.58 60 ONTARIO, JCT. RTE. 83

9 17 41 666,770 259,000 24,864 9.6 ORA 36.258 5 KATELLA AVENUE

10 3 77 664,620 221,000 27,050 12.24 SBD 2.366 60 CENTRAL AVENUE

11 15 54 656,842 245,300 25,094 10.23 SBD 9.936 10 ONTARIO, JCT. RTE. 15

11 16 54 656,8 42 245,300 25,094 10.23 SBD 11.132 10 ETIWANDA AVENUE

12 19 40 656,299 261,600 24,067 9.2 ORA 5.258 91 ANAHEIM, STATE COLLEGE BOULEVARD

13 7 75 652,729 223,000 26,203 11.75 LA 29.392 60 POMONA, JCT. RTE. 71, CHINO VALLEY FREEWAY

13 8 75 652,729 223,000 26,203 11.75 SBD 0 60 LOS ANGELES/SAN BERNARDINO COUNTY LINE

14 25 28 641,736 276,000 22,301 8.08 ORA 2.615 91 BUENA PARK, JCT. RTE. 39/BEACH BOULEVARD

15 12 83 636,004 215,000 25,671 11.94 SBD 5.855 60 GROVE AVENUE

### Air Quality Monitoring Network Plan

– July 2013

25 The process of ranking the roadway segments began with creating a scoring matrix incorporating EPA TAD considerations. The scoring matrix was used as a tool to determine the most suitable location for monitoring by incorporating traffic data and quantifying station siting

considera tions. FE AADT was weighted a factor of five due to the major role traffic influences near roadway monitoring. Other important factors such as roadway design, distance from roadway, meteorology, roadside structures and terrain were taken into considerati on and weighted a factor of one each and are defined as follows:

Roadway Design

– Considers monitor placement and can affect pollutant transport and dispersion. The most desirable attributes include a monitoring location at grade with the surrounding ter rain and roadway. The least desirable attributes include deep cut

- sections significantly below grade or significantly above grade.

Distance from Roadway

- Per 40 CFR Part 58 Appendix E: the site should be “As near as practicable to the outside nearest ed ge of the traffic lanes of the target road segment; but shall not be located at a distance greater than 50 meters, in the horizontal, from the outside nearest edge of the traffic lanes of the target road segment.” The TAD recommends the target distance fo r near

road NO2 monitor probes be within 20 meters of the target road whenever possible.

Meteorology

– Can affect pollution transport and dispersion. The most desirable location is

relative downwind locations

– winds from road to monitor. The least des irable locations are sites upwind of the target road.

Roadside Structures

– Considers monitor placement and can affect pollutant transport and dispersion. The most desirable monitoring location will have no barriers present other than low (< 2m in height ) safety barriers or guard rails. The least desirable attributes include the presence of sound walls, mature vegetation (high and thick) or obstructive buildings.

Terrain

– Can affect pollutant dispersion and local atmospheric stability. The most desira ble terrain is flat or gentle terrain, within a valley, or along road grade. The least desirable terrain is along mountain ridges or peaks, hillsides, or other naturally windswept areas.

A scale normalized to 5 was used to rank each candidate segment; the scoring matrix is shown as Table 10

.

### Air Quality Monitoring Network Plan

– July 2013

26 TABLE 10

. Candidate Segment Scoring Matrix

Score 5 3 1 0

FE AADT (Weighted 5x) Traffic count of the highest ranked FE

AADT Normalized to the

highest ranked FE

AADT Normalized to the

highest ranked FE

AADT N/A

Roadway Design At same elevation Slightly higher

elevation Below grade /

Under overpass / On bridge Design prevents access

or accurate representation of roadway.

Distance from Roadway Less than or equal to

20 m Normalized distance

from 20 m to 50 m 50 m from

roadway >50 m

Meteorology (predominant wind direction) Downwind Parallel Upwind N/A

Roadside Structures No barriers ( < 2 m) Some obstruction (small sound barriers sparse low vegetation) Major obstruction

(large sound walls, buildings). Co mpletely blocked

Terrain Flat / mildly sloping Uneven Mountain ridges, Canyons Terrain prevents access

or accurate representation of roadway Weighting Values

FE AADT 5 Roadway Design 1 Distance from Roadway 1 Meteorology 1

Roadside Structures 1

Terrain 1



### The top 15 FE AADT sites were surveyed and ranked according to the scoring matrix. Some sites had several locations within the road segment to consider and each location was scored individually as a sub

- site. The results are shown for the L os Angeles

- Long Beach

- Santa Ana

MSA \ CBSA (Code 31100) and the Riverside

- San Bernardino

- Ontario MSA \ CBSA (Code 40140) in Tables 1 1 and 12

.

### Air Quality Monitoring Network Plan

– July 2013

27 TABLE 1 1

. Los Angeles

- Long Beach

- Santa Ana MSA \ CBSA

### Air Quality Monitoring Network Plan

– July 2013

28 TABLE 1 2 . Riverside

- San Bernardino

- Ontari o MSA \ CBSA

### Air Quality Monitoring Network Plan

– July 2013

29 Level of Service (congestion) data is considered to differentiate between two comparatively ranked segments as part of the site selection process. Tables 1 3

, 1 4 and 1 5 show the top congested freeways in the Los Angeles, Orange, and the Riverside

- San Bernardino

- Ontario

MSA \ CBSA for the 3 rd 

### quarter 2012.

TABLE 1 3

. Top Congested Freeways Los Angeles County

TABLE 1 4

. Top Congested Freeways Orange County

### Air Quality Monitoring Network Plan

– July 2013

30 TABLE 1 5

. Top Congested Freeways Riverside & San Bernardino Counties

On January 23, 2013 a Near Roadway Monitoring workshop was held at SCAQMD’s Diamond Bar office. EPA along with SCAQMD staff presented and held a discussion on SCAQMD’s progress and implementation plan for the Near Roadway monitoring requirements. The

workshop was attended by approximately 17 members of the public. Comments were solicited at the conclusion of the workshop and no written comments were received regarding selection criteria or proposed sites.

Sites are selected based on their ranking in the scoring matrix however there are other considerations involved in the site selection process. These considerations include:

Safety

- Near

- road monitoring sites must be accessible to station operators in a safe and legal manner, and not pose safety hazar ds to drivers, pedestrians, or nearby residents. Safety hazards to monitoring site operators include factors which inhibit the safe entrance to or egress from a site and factors that could allow vehicles to encroach upon and damage the site infrastructure.



### Accessibility

– ability to access the desired location from the property owner or ability to obtain a right of way permit.

Infrastructure

– availability of power and data connection at the site.

The projected timeline for installation and operation of the near roadway monitoring sites is as

follows:

Date Activity January to June 2013 Finalize site selection process for phase I implementation.

Include in Annual Network Plan. Obtain permission and or permits for highest ranking sites.

Jul y 2013 Site survey with construction manager. July to November 2013 Site preparations (construction, utility installation etc.)

### Air Quality Monitoring Network Plan

– July 2013

31 November to December 2013 Instrument installation and field quality control checks. January 2014 Collection and reportin g of data for phase I.

January 2014 to June 2014 Finalize site selection process for phase II implementation.

Include in Annual Network Plan. Obtain permission and or permits for highest ranking sites. July 2014 Site survey with construction manager. July to November 2014 Site preparations (construction, utility installation etc.)

November to December 2014 Instrument installation and field quality control checks. January 2014 Collection and reporting of data for phase II.

Following star tup date, the continuous operation of instrumentation and meteorological data is ongoing with data reported to AQS and AIR/Now.

Van Nuys Pb Monitoring S ite

On November 12, 2008, the EPA issued final revisions to the NAAQS for Pb. Network design requireme nts included monitoring for sources of Pb (source oriented monitoring) and urban Pb monitoring (non

- source oriented). To meet this requirement, a source oriented site w as 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 the most recent emissions inventory showed Pb 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. SCAQMD is currently in consultation with EPA Region IX to determine the need for continued monitoring. Prior to discontinuance of monitoring a waiver will be obtained from EPA Region IX.

Sulfate Monitoring SCAQMD has been monitoring TSP sulfate data at the Azusa , Fontana, Pasadena

, and West Los Angeles monitoring since the inception of the monitoring sites. In 2003 , ARB r evise d 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 SCAQMD PM10 and TSP

sulfate data fo r 1999 though 2010 and found good correlation between the two methods. TSP

sulfate data was reviewed in consultation with EPA and ARB who determine d the need did not

exist for continued TSP sulfate monitoring and a waiver was not necessary since the rule no longer exists

. TSP sulfate monitors were removed from the Pasadena and West LA monitoring

sites. The TSP sulfate monitors will continue at the Azusa and Fontana sites through the end of the MATES IV program.

Pasadena SCAQMD has been operating the Pas adena 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, the station shelter

w as replaced in FY 2012

- 13 . No changes have been made to the location or siting of the shelter.

### Air Quality Monitoring Network Plan

– July 2013

32 Crestline SCAQMD has been operating the Crestline site since 19 73 . 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

h as been ordered t o replace the existing trailer during FY 201 3

- 1 4

.

West LA SCAQMD has been operating the West L A site since 1983 . 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

h as been ordered t o replace the existing trailer during FY 201 3

- 14

.

Riverside Magnolia SCAQMD has been operating the Riverside Magnolia site since 1972 . The deteriorating state of

the building along with compromises made to the siting criteria due to obstru ctions has made it a

candidate for site relocation

. SCAQMD in consultation with EPA Region IX has located a candidate site for relocation. During the FY 2013

- 14 a data comparison between the sites will be undertaken. If comparison of data between the t wo locations demonstrates some comparability, the Riverside site may be relocated in consultation with EPA Region IX.

South Long Beach SCAQMD has been operating the South Long Beach station as part of the ambient air

monitoring network. Recent constructi on of the buildings adjacent to our air monitoring equipment compromises the siting criteria. During the FY 201 3

- 14 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 in consultation

with EPA Region IX.

Air Monitoring Station Improvements As part of the actions to enh ance q uality of data collected, SCAQMD 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.

PAMS SCAQM D currently operates five upper air meteorological stations within the South Coast Air Basin, as part of the PAMS program, using remote sensing technologies. Sites include:

Los Angeles International Airport (LAX), Los Angeles County Whiteman Airport (WHP ), Pacoima, Los Angeles County Ontario International Airport (ONT), San Bernardino County Moreno Valley (MOV), Riverside County Irvine (IRV), Orange County

Sites utilize the Scintec Corporation LAP

- 3000 915 MHz boundary layer radar wind profilers (RWP) wi th radio acoustic sounding systems (RASS), as well as some Atmospheric Systems

### Air Quality Monitoring Network Plan

– July 2013

33 Corporation miniSodars to help collect winds in the lowest layers. The wind profiler network is larger than most areas due to the complex terrain and meteorological character istics of the South

Coast Air Basin.

The LAP

- 3000 RWP systems at all five stations were evaluated extensively on

- site by Scintec in February 2013. Relatively routine problems were found at the monitoring sites and are currently being repaired, however t here were more significant problems found with the LAX RWP

. The

LAX RWP is the oldest system, built in the early 1990s and installed in 1994 after being used for a field campaign. Issues include:

Final Amplifier failure (both final amp and pre

- amp do n ot meet output specifications). Discrete parts no longer available to repair subsystems

. Radar Antenna failure (defective antenna RF dividers; return signal loss).

Antenna Phase Shifter likel y to fail soon due to corrosion.

The cost for the replaceme nt sub systems to repair the existing RWP is $178,000, plus tax and shipping, including a new antenna, phase shifter and final amplifier. In addition it is necessary to replace the aging computer and electronics (Modulator/IF/Interface unit and Power Suppl y) with a whole new RWP system would cost approximately $270,000 total, plus tax and shipping. Due to the cost of repairing the current LAX system, as well as the cost of maintaining the network of upper air stations in the South Coast Air Basin, SCAQMD p roposes to reduce the size of the

network. After consideration of the data needs and priorities, we propose closing the Whiteman Airport upper air station, and using those components to maintain the LAX RWP

. The LAX

station is a key location for upper ai r data for analyses, forecasting and modeling activities in the

Basin. The Whiteman Airport system is the newest and best suited for the environment at LAX.



## Minimum Monitoring Requirements

The SCAQMD jurisdictional boundary encompasses two MSA s and tw o CBSAs whose

boundaries and codes mirror those of the MSAs as defined by the U.S. Office of Management and Budget. Los Angeles

- Long Beach

- Santa Ana MSA \ CBSA (Code 31100) has an estimated population of 13,052,921 and the Riverside

- San Bernardino

- Ontario M SA \ CBSA (Code 40140) has an estimated population of 4,350,096 according to U.S. Census estimates for 2012 . The minimum number of monitors for each pollutant is based on MSA population as described in 40 CFR § 58 Appendix D. T he SCAQMD is a Primary Qualit y Assurance Organization (PQAO)

and the network exceeds the minimum monitoring requirements for all criteria pollutants. Details are provided below.

### Air Quality Monitoring Network Plan

– July 2013

34 Table 1 6 Minimum Monitoring Requirements for Ozone.

(Note: Refer to section 4.1 and Table D

- 2 of Ap pendix D of 40 CFR Part 58

. )

MSA Counties Population and

Census Year 8

- hr Design

Value (ppb) DV,

Years 1 Design Value Site

(name AQS ID 0 Monitors

Required Monitors

Active Monitors

Needed

31100 Los Angeles

Orange 13,052,921

,

2012 96,

2009

- 2012 Santa Clar ita

060376012 4 17 0

40140 San Bernardino

Riverside 4,350,096

,

2012 106,

2009

- 2012 Crestline

060710005 3 12 0

1 DV Years

– The three years over which t he design value was calculated.

Monitors required f

or SIP or Maintenance Plan: 29



### Table 1 7 a Minimum M onitoring Requirements for PM2.5 SLAMS (FRM/FEM/ARM)

(Note: Refer to sections 4.71, 4.72, and Table D

- 5 of Appendix D of 40 CFR Part 58

. )

MSA Counties Population

and Census

Year Annual

Design

Value [ug/ m3],

DV &

Years 1 Annual

Design Value Site (Name, AQS ID) Daily

Design

Value [ug/m3],

DV &

years Daily

Design

Value site (name AQS ID) # Required

SLAMS

Monitors # Active

SLAMS

Monitors #

Additional

SLAMS

needed

31100 Los

Angeles Orange 13,052,921,

2012 12.6,

2009

- 2012 Los Angele s

060371103 32.2,

2009

- 2012 Burbank

060371002 3 11 0

40140 San

Bernardino

Riverside 4,350,096,

2012 15.2,

2009

- 2012 Mira Loma

060658005 36.2,

2009

- 2012 Mira Loma

060658005 3 9 0

1 DV Years

– The three years over which the design value was calculated

.

### Air Quality Monitoring Network Plan

– July 2013

35 Table 1 7 b Minimum Mo nitoring Requirements for Continuous PM2.5 Monitors (FEM and

Non

- F EM ) *



### ( FEM/ARM and non

- FEM see 40 CFR 58 Appendix D Section 4.72

. )

MSA Counties Population

and Census

Year Annual

Design

Value [ug/m3],

DV &

Years 1 Annual

Design

Value Site (Name, AQS ID) Da ily

Design

Value [ug/m3],

DV &

years Daily Design

Value site (name AQS ID) # Required

Continuous

Monitors # Active

Continuous

Monitors #

Additional

Continuous

needed

31100 Los Angeles

Orange 13,052,921,

2012 18.9,

2009

- 2012 Los Angele s

060371103 45.3,

2009

- 2012 Los Angele s

060371103 2 5

- FEM

3

- Non FEM 0

40140 San

Bernardino

Riverside 4,350,096,

2012 21.3,

2009

- 2012 Mira Loma

060658005 42.21,

2009

- 2012 Mira Loma

060658005 2 2

- FEM

6

- Non FEM 0

1 DV Years

– The three years over which the design value was c alculated

. Monitors required for SIP or Maintenance Plan: 16
* C urrently all active continuous monitors do not meet acceptance criteria under 78 FR 3086 (Appendix C) and is
requested to not be compared to the NAAQS



### .

Table 1 7 c Minimum Monitoring Requirem ents for Speciated PM2.5 Monitors

(Note: Refer to sections 4.74 of Appendix D of 40 CFR Part 58.)

MSA Counties Population

and Census

Year Monitors

Required 1 Monitors

Active Monitors

Needed

31100 Los Angeles

Orange 13,052,921

,

2012 1 2 0

40140 San

Bern ardino

Riverside 4,350,096

,

2012 1 2 0

1 sites designated as part of the PM 2.5 Speciation Trends Network (STN).

### Air Quality Monitoring Network Plan

– July 2013

36 Table 1 8 Minimum Monitoring Requirements for PM10

(Note: Refer to section 4.6 and Table D

- 4 of Appendix D of 40 CFR Part 58

. )

MSA Cou nties Population

and Census

Year Max

Concentration [ug/m3] Max

Concentration site (name AQS ID) # Required

Monitors # Active

Monitors # Additional

Monitors

Needed

31100 Los Angeles

Orange 13,052,921,

2012 80 Los Angeles

060371103 4

- 8

Med Conc 9 0

40140 San

Bernardino

Riverside 4,350,096,

2012 124 Indio,

060652002 6

- 10

High Conc 1 2 0

Monitors required for SIP or Maintenance Plan: 21



### Table 1 9 Minimum Monitoring Requirements for NO2

(Note : Refer to section 4.3 of Appendix D of 40 CFR Part 58

. )

CBSA Popu lation

and Census

Year Max

AADT

Counts ( 2010 ) 1 # Required

Near Road

Monitors 2 #Active

Near Road

Monitors 3 #Additional

Near Road

Monitors

Needed 4 #Required

Area Wide

Monitors #Active

Area Wide

Monitors #Additional

Area wide

Monitors

Needed

31100 13,052,92 1,

2012 357,000

,

2010 0 0 0 1 17 0

40140 4,350,096,

2012 245,300

,

2010 0 0 0 1 8 0

1 Max AADT Counts

– 2011 is the latest data available from CA DOT ; traffic volumes in California have decreased avg. 1.1%

from 2010.

2 Two r equired beginning January 1, 201 4

. 3 Two r equired sites to be active by January 1, 2014. See schedule in Recent or Proposed Changes to Network, Near Road Monitoring.

4 One additional site per CBSA to be active by January 1, 2015. See schedule in Recent or Proposed Changes to Network, Ne ar Road Monitoring. Monitors required for SIP or Maintenance Plan: 1 5 Monitors Required for PAMS : 7 EPA Regional Administrator

- required monitors per 40 CFR 58, Appendix D 4.3.4: 3

### Air Quality Monitoring Network Plan

– July 2013

37 Table 20 Minimum Monitoring Requirements for S O2

(Note : Refer to s ection 4.4 of Appendix D of 40 CFR Part 58

. )

CBSA Counties Total SO2 1
[tons/year] Population Weighted Emissions

Index 2
[million persons

- tons per year] #Active

Near Road

Monitors #Required

Area

Wide

Monitors #Active

Area

Wide

Monitors #Additional

Area wide

Monitors

Needed

31100 Los Angeles

Orange 13,052,921,

2012 157,455 0 2 5 0

40140 San

Bernardino

Riverside 4,350,096,

2012 11,097 0 1 2 0

1 Using latest NEI data 2008 Version 2, available on EPA website : http://www.epa.gov/ttn/chief/net/2008inventory.htm l

2 Calculated by multiplying CBSA population and total SO2 and dividing product by one million

. Monitors required for SIP or Maintenance Plan: 7 EPA Regional Administrator

- required monitors per 40 CFR 58, Appendix D 4.4.3 : 0



### Table 21 Minimum Monitoring Requirements for CO

(Note : Refer to section 4.2 of Appendix D of 40 CFR Part 58

. )

CBSA Population

and Census

Year #Required

Near Road

Monitors 1 #Active

Near

Road

Monitors 2 #Required

Area

Wide

Monitors #Active

Area

Wide

Monitors

31100 13,052,921,

2012 0 0 0 17

40140 4,350,096,

2012 0 0 0 8

1 Required beginning January 1, 201 5

2 Required sites to be active by January 1, 2015 ; to be implemented concurrently with near road NO2 sites. Monitors required for SIP or Maintenance Plan: 25 EPA Regional Administrat or

- required monitors per 40 CFR 58, Appendix D 4.4. 2 : 0



### Table 2 2 a Minimum Monitoring Requirements for Pb at NCore

(Note: Refer to section 4.5 of Appendix D of 40 CFR Part 58

. )

NCore Site (name, AQS ID ) CBSA Population and

Census Year # Required

Monitor s # Active Monitors # Additional

Monitors Needed Los Angeles (Main Street)

060371103 31100 13,052,921, 2012 1 1 0

Rubidoux

060658001 40140 4,350,096, 2012 1 1 0

### Air Quality Monitoring Network Plan

– July 2013

38 Table 2 2 b Source Oriented Pb Monitoring (Including Airports)

(Note: Refer to section 4. 5 of Appendix D of 40 CFR Part 58

. )

1 Consider da ta from past three years.

2 Data found at http://www.epa.gov/ttn/chief/net/2008inventory.html (5/1/2013) Monitors Required for SIP or Mainte nance Plan: 5 EPA Regional Administrator required monitors per 40 CFR 58, Appendix D 4.5(C) c: 0



### Table 2 2 c Minimum Monitoring Requirements for Pb Non Source Monitoring

(Note: Refer to section 4.5 of Appendix D of 40 CFR Part 58

. )

CBSA Population and

C ensus Year # Required Area

Wide Monitors # Active Area Wide

Monitors # Additional

Monitors Needed

31100 13,052,921,

2012 0 5 0

40140 4,350,096,

2012 0 3 0

### Air Quality Monitoring Network Plan

– July 2013

39 Table 2 3 Minimum Monitoring Requirements for PAMS

(Note: Refer to section 4.5 of A ppendix D of 40 CFR Part 58

. )



### Table 2 4 Collocated Manual PM2.5, PM10, and Non

- NCore Pb Ne tworks

(Note: Refer to section 3.2.5, 3.3.5, 3.3.1, and 3.3.4.3 of Appendix A, 40 CFR Part 58

. )



### Table 2 5 Collocated Automated (continuous) PM2.5 Network

(Note: Refer to section 3.2.5 & 3.3.5 of Appendix A, 40 CFR Part 58

. )

1 No FEM PM2.5 BAMs are listed as primary monitors ; therefore no collocation requirement exists but all are collocated with

FRM monitors. Area Type # Required PAMS

Sites # Active PAMS

Sites # PAMS Sites

Needed

SCAQMD Monitoring Area 1 or 3 1 3 0

2 1 4 0

4 0 0 0 Upper Air Meteorology 1 5 0

Pollutant Method Code # Primary

Monitors # Required

Collocated Monitors # Active Collocated

Monitors

PM2.5 (RAAS) 120 20 3 3

PM10 (SSI Hi

- Vol) 063 21 3 3

P b (TSP Hi

- Vol) 110 (Non Source) 8 1 2

Pb (Tsp Hi

- Vol) 110 (Source) 5 1 1

Method Cod e 1 # Primary

Monitors # Required

Collocat ed Monitors # Active Collocated

Monitors

None 0 0 0

### Air Quality Monitoring Network Plan

– July 2013

40 

## Data S ubmittal and A rchiving R equirements

As re quired in 40 CFR 58.16(a), data has been reported via AQS including all ambient air quality data and associated quality assurance data for SO2

, CO

, O3

, NO2 , NO, NOy

, NOX , Pb

- TSP mass concentration, Pb

- PM10 mass concentration, PM10 mass concentration, PM2.5 mass concentration, filter

- based PM2.5 FRM/FEM field blank mass, sampler

- generated average daily temperature, and sampler

- g enerated average daily pressure, chemically speciated PM2.5 mass

concentration data

, PM10

- 2.5 mass concentration, meteorological dat a from NCore and PAMS sites, average daily temperature \ average daily pressure for Pb sites and metadata

records \ information as specified by the AQS Data Coding Manual through December 31, 2012.

A data certification letter has been submitted to the EPA R egional Administrator certifying data collected at all SLAMS and at all FRM, FEM, and ARM SPM stations that meet criteria in appendix A

, to part 58

, for January 1 through December 31, 2012.

### Air Quality Monitoring Network Plan

– July 2013

APPENDIX A

SCAQMD Network Depictions

### Air Quality Monitoring Network Plan

– July 2013

A

- 1 Figure 1 SCAQMD Ozone Monitoring Locations

### Air Quality Monitoring Network Plan

– July 2013

A

- 2 Figure 2 SCAQMD PM10 Monitoring Locations

### Air Quality Monitoring Network Plan

– July 2013

A

- 3 Figure 3 SCAQMD Monitoring Locations for Nitrogen Dioxide

### Air Quality Monitoring Network Plan

– July 2013

A

- 4 Figure 4 SCAQMD Monitoring Locations for Carbon Monoxide

### Air Quality Monitoring Network Plan

– July 2013

A

- 5 Figure 5 SCAQMD Monitoring Loc ations for Sulfur Dioxide

### Air Quality Monitoring Network Plan

– July 2013

A

- 6 Figure 6 SCAQMD Source and Ambient Particulate Lead Monitoring Locations

### Air Quality Monitoring Network Plan

– July 2013

A

- 7 Figure 7 SCAQMD PAMS Monitoring Locations

### Air Quality Monitoring Network Plan

– July 2013

A

- 8 Figure 8 SCAQMD PM2.5 Monitoring Locations B = BAM FEM

B1 = BAM

### Air Quality Monitoring Network Plan

– July 2013

B

- 1 APPENDIX B



# Detailed Site Information

Detailed information for air monitoring locations are included in site reports

. For information on monitoring objectives, purposes and scales, please refer to the main text of this plan.

 Anah eim

 ATSF (Exide)

 Azusa

 Banning Airport

 Big Bear

 Burbank

 Closet World (Quemetco)

 Compton

 Costa Mesa

 Crestline

 Fontana

 Glendora

 Indio

 La Habra

 Lake Elsinore

 LAX Hastings

 Long Beach North

 Long Beach South

 Los Angeles

 Mira Loma (Van Buren)

 Miss ion Viejo

 Norco

 Ontario Fire Station

 Palm Springs

 Pasadena

 Perris

 Pico Rivera #2

 Pomona

 Redlands

 Rehrig (Exide)

 Reseda

 Riverside

 Rubidoux

 San Bernardino

 Santa Clarita

 Temecula

 Uddelholm (Trojan Battery)

 Upland

 Van Nuys Airport

 West Los Ange les

### Air Quality Monitoring Network Plan

– July 2013

B

- 2 Table 26 Selected POC

, Parameter and Method Codes

Instrument Pollutant POC Code Method

Code Parameter Code

910 NATTS VOCs 4 172 43218, 43372, 43505, 43551, 43552, 43802, 43803, 43804, 43815, 43817, 43824, 43829, 43843, 43860, 45109, 45201, 45202, 45203, 45204, 45220,
45805, 45807.

910 PAMS VOCs 2, 7, 2, or 8 126 4300 0 , 43102, 43202, 43203, 43204, 43205, 43206, 43212, 43214, 43216, 43217, 43220, 43221, 43224, 43226,
43227, 43230, 43231, 43232, 43233, 43235, 43238, 43242, 43243, 43244, 43245, 43247 , 43248, 43249, 43250, 43252, 43253, 43261, 43262, 43263,
43280, 43284, 43285, 43291, 43954, 43960, 45109, 45201, 45202, 45203, 45204, 45207, 45208, 45209, 45210, 45211, 45212, 45213, 45218, 45219,
45220, 45225.

ATEC 8000 PAMS Carbonyls 2 or 8 102 4350 2, 43503.

GMW 1200 PM10 1,2,4, or 6 063 or 102 81102, 85101, 82203, 82308, 82403.

Anderson RAAS PM2.5 Particulate 1 or 2 780 68108, 68107, 68106, 68105, 68104,
68103, 68101, 68109, 68102

Anderson RAAS PM2.5 Particulate 1 or 2 120 88101

Met One SASS Speciated PM2.5 11 or 12 812 88301, 88306, 88302, 88403.

Met One SASS Speciated PM2.5 11 or 12 810 68108, 68107, 68106, 68105, 68104, 68103, 88502.

Met One SASS Speciated PM2.5 11 or 12 780 68101, 68109, 68102.

Met One SASS Speciated PM2.5 11 or 1 2 811 88102, 88103, 88107, 88110, 88111, 88118, 88115, 88112, 88113, 88114, 88126,88128, 88132, 88134, 88136, 88152, 88180, 88176, 88154, 88165, 88168, 88169, 88160, 88161, 88179,
88164, 88183, 88167.

Met One SASS Speciated PM2.5 11 or 12 816 88380, 88383 , 88384, 88385, 88370, 88374, 88375, 88376, 88377.

Xontech 924 CR6 4 or 5 920 12115

Xontech 924 Carbonyls 4 102 43502, 43503.

Xontech 924 Metals 2 or 4 110 85102, 85103, 85105, 85110, 85128, 85132, 85136.

### Air Quality Monitoring Network Plan

– July 2013

C

- 1 APPENDIX C



# PM2.5 Continuous Monitor Comparability Assessment and Request

for Waiver

Introduction

The SCAQMD monitoring program has historically operated PM 2.5 continuous monitors

primarily to support forecasting and reporting of the Air Quality Index (AQI). These monitors

supply data every hour to update the AQI on our web site as well as national web sites such as

AIRNow (www.airnow.gov). SCAQMD has been using these monitors since the early part of the

last decade as we implemented the PM 2.5 monitoring program. Over the last few years, a

nu mber of PM 2.5 continuous monitors have been approved as Federal Equivalent Methods

(FEMs). By utilizing an approved FEM, any subsequent data produced from the method may be

eligible for comparison to EPA’s health based standard known as the NAAQS. The prim ary

advantage of operating a PM 2.5 continuous FEM is that it can support the AQI, while also

supplying data that are eligible for comparison to the NAAQS. Thus, a network utilizing PM 2.5

continuous FEMs can potentially lower the number of filter

- based FRMs operated in the

network, which are primarily used for comparison to the NAAQS. These filter

- based FRMs are

resource intensive in that they require field operations as well as pre

- and post

- sampling

laboratory analysis which results in data not being avail able for approximately 2

- 4 weeks after

sample collection.

The SCAQMD monitoring program has been evaluating PM 2.5 continuous FEMs over the past

several years . Although the PM 2.5 continuous FEMs are automated methods, these methods still

require careful a ttention in their set

- up, operation, and validation of data. Once enough data was

collected, we began to evaluate the performance of these methods compared to collocated FRMs.

That evaluation is explained further below and includes our re quest regarding th e use of the data

from these methods.

Request for Exclusion of PM 2.5 Continuous FEM da ta from Comparison to the NAAQS

The network technical requirements for requesting exclusion of data from comparison to the

NAAQS are identified in 40 CFR § 58.11(e). The se requirements r efer to the performance criteria

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- 2 described in Table C

- 4 to subpart C of part 53. To accommodate the differences in how routine

monitoring agencies operate their networks, several additional provisions are described in

§ 58.11(e). When a top ic is not addressed in § 58.11(e), then the test specifications from table C

- 4

applies.

As shown in the Table below, the slope of the regression between collocated FRM and FEM

measurements at the Anaheim, Burbank, Central Los Angeles, North Long Beach, So uth Long

Beach, and Rubidoux (Cont POC 3) stations is higher than 1.1, which is outside the test

specification indicated in § 53 Table C

- 4 (i.e. slope = 1 ± 0.1). Although the slope criteria was

met, t he intercept of the regression relationship between FRM and FEM data at the Rubidoux

(Cont POC 9) and Mira Loma monitoring sites does not meet the test specifications of between

15.05

- (17.32 × slope), but not less than

- 2.0; and 15.05

– (13.20 × slope), but not more than

+2.0 (also indicated in § 53 Table C

- 4)

.

Thus, i n accordance with the PM NAAQS rule published on January 15 th 

### , 2013 (78 FR 3086)

and specific to the provisions detailed in §58.10 (b)(13) and §58.11 (e)

, SCAQMD is requesting

that data from the all of the SCAQMD FEM PM 2.5 monitors be set aside for comparison to the

NAAQS. While SCAQMD is working to optimize the monitoring instrumentation to meet all of

our monitoring objectives, the performance is not yet at a point where the comparability of the

PM 2.5 continuous FEMs operated in our network com pared to collocated FRMs is acceptable

. After assessing the comparability of the PM 2.5 FEMs to the collocated FRMs for our network,

the sites listed below do not meet the co mparability requirements. Detailed one

- page assessments

from which the information described below was obtained are incl uded at the end of this section.

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- 3 Table

– Request for Exclusion of PM 2.5 Continuous FEM Data

Site Name City Site ID Cont

POC Cont Method Description PM 2.5

Cont Begin

Date PM 2.5

Cont

End

Date Continuous/

FRM Samp ler

Pairs Per

Season Slope

(m) Intercept

(y) Meets Bias Requirement Correlation

(r)

Sites with PM

2.5 continuous FEMs that are collocated with FRMs

Anaheim Anaheim 06

- 059

- 0007 3 Met

- One BAM

1020 w/VSCC 01/01/

2010 12/31/

2012 Winter = 247

Spring = 269

Summe r = 241

Fall = 244

Total = 1001 1.16 2.83 No 0.94

Burbank Burbank 06

- 037

- 1002 3 Met

- One BAM

1020 w/VSCC 01/01/

2010 12/31/

2012 Winter = 260

Spring = 211

Summer = 255

Fall = 244

Total = 970 1.14 3.81 No 0.91

Central Los Angeles Los

Angeles 06

- 037

-

1103 3 Me t

- One BAM

1020 w/VSCC 01/01/

2009 09/29/

2011 Winter = 226

Spring = 161

Summer = 170

Fall = 182

Total = 739 1.21 1.77 No 0.93

9 Met

- One BAM

1020 w/VSCC 10/01/

2011 12/31/

2012 Winter = 92

Spring = 76

Summer = 74

Fall = 142

Total = 384 1.11 5.33 No 0.81

No rth Long

Beach Long

Beach 06

- 037

-

4002 3 Met

- One BAM

1020 w/VSCC 01/01/

2010 12/31/

2012 Winter = 221

Spring = 231

Summer = 268

Fall = 249

Total = 969 1.16 1.67 No 0.93

South Long

Beach Long

Beach 06

- 037

-

4004 3 Met

- One BAM

1020 w/VSCC 01/01/

2012* 12/31/

2012 Winter = 72

Spring = 91

Summer = 57

Fall = 34

Total = 254 1.29

- 0.48 No 0.96

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- 4 Riverside/

Rubidoux Rubidoux 06

- 065

- 8001 3 Met

- One BAM

1020 w/PM2.5 SCC 01/01/

2010 07/31/

2011 Winter = 101

Spring = 57

Summer = 224

Fall = 264

Total = 646 1.19 0.51 No 0.90

9 Met

- One BAM

1020 w/VSCC 08/02/

2011 12/31/

2012 Winter = 88

Spring = 75

Summer = 127

Fall = 175

Total = 465 1.10 3.34 No 0.86

Mira Loma Mira Loma 06

- 065

- 8005 3 Met

- One BAM

1020 w/VSCC 01/01/

2010 12/31/

2012 Winter = 246

Spring = 248

Summer = 252

Fall = 268

Total = 1014 1.07 5.01 No 0.91

*2010 and 2011 data have not been submitted to AQS

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- 5 Period of Exclusion of Data from the PM 2.5 Continuous FEMs

The above table details the period of available data by monitor on which the re quest to exclude

PM 2.5 contin uous FEM data is based . Per EPA Regional Office approval, these data will be

entered in to EPA’s AQS database in a manner where the data are only used for the appropriate

monitoring objective(s) (i.e., use data for just the AQI). Additionally, SCAQMD will c ontinue to

load any new data generated for the next 18 months (intended to represent the period until

December 31 of 2014) in the same manner or until such time we request and receive approval

from the EPA Regional Office to change the status of these moni tors

.

PM2.5 Continuous FEM data for Reporting the AQI

While the analysis supports the request for the monitors above not be used for comparison to the

NAAQS, the data are of sufficient comparability to collocated FRMs that they be used for public

AQI rep orting. Therefore, with EPA Regional Office approval we will report these data on our

web site and to AIRNow (www.airnow.gov ). As such, data submitted to EPA’s AQS database

will be under “acceptable AQI” reporting (i.e., parameter code 88101) so that data users will

know that these data are appropriate for use in AQI calculations, but not NAAQS comparison.

Assessments

The following one

- page assessments are locations where our agency has collocated PM 2.5 FRM

and continuous FEM monitors. Each of these asses sments is represented in the “ Table

–
Request for Exclusion of PM 2.5 Continuous FEM Data” above.

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- 6 

# Anaheim

(FRM POC: 1; FEM POC: 3)

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- 7 

# Burbank

(FRM POC: 1; FEM POC: 3)

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- 8 

# Central Los Angeles

(FRM POC: 1; FEM POC: 3)

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- 9 

# Central Los Angeles

(FRM PO C: 1; FEM POC: 9)

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- 10 

# North Long Beach

( FRM POC: 1; FEM POC: 3 )

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- 11 

# South Long Beach

( FRM POC: 1; FEM POC: 3 )

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- 12 

# Rubidoux

( FRM POC: 1; FEM POC: 3 )

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- 13 

# Rubidoux

( FRM POC: 1; FEM POC: 9 )

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- 14 

# Mira Loma

(FRM POC: 1; FEM POC: 3)