# SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

ANNUAL AIR QUALITY MONITORING NETWORK PLAN

July

, 201 5

Deputy Executive Officer Science and Technology Advancement Matt Miyasato, Ph.D.

Assistant Deputy Executive Officer Science and Technology Advancement Laki Tisopulos, Ph.D., P.E.

Atmospheric Measurements Manager Science and Technology Advancement Jason Low, Ph.D.

Authors: Rene M. Bermudez

Principal Air Quality Instrument Specialist

Brian Vlasich Senior Air Quality Instrument Specialist

Jason Low

, Ph. D Atmospheric Measurements Manager

### Air Quality Monitoring Network Plan

– July, 2015

i 

# Table of Contents

Page

Introduction 1

Public Comments 1 Network Design 1 Special Programs 19 Recent or Proposed Modifications to Network 2 2 Minimum Monitoring Requirements Data Submittal and Archiving Requirements 3 7

4 4

Appendix A: Network Depiction Maps

 Ozone Monitoring Locations A

- 1

 PM10 Monitoring Locations A

- 2

 Nitrogen Dioxide Monitoring Locations A

- 3

 Carbon Monoxide Monitoring Locations A

- 4

 Sulfur Dioxide Monitoring Locations A

- 5

 Source and Ambient Lead Monitoring Locations A

- 6

 PAMS Monitoring Locations A

- 7

 PM2.5 Monitoring Locations A

- 8

Appendix B: Detailed Site Information Appendix C: PM2.5 Continuous Monitor Comparability Assessment

and Request for Waiver Appendix D:Waiver requests

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1 

# INTRODUCTION

An annual review of the Air Quality Monitoring Network is required by Federal Regulations as a means to identify and report needs for additions, relocations, or terminations of monitoring sites or instrumentation. This report describes the network of ambie nt 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 201 4

- 20 1 5 fiscal year and plans for action in the year

ahead. This plan addresses th e requirement for an annual network plan as listed in Title 40, Part 58, Section 10 of the Code of Federal Regulations (40 CFR § 58 .10). Regulations require the report be submitted to the U.S. Environmental Protection Agenc y (EPA) by July 1 of each year

a fter 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 Ai r Monitoring 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 13 to conduct a comprehensive Technical System Audit (TSA) of the ambient air monitoring network. Each year, SCAQMD staff conducts an annual revie w of it s 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 is required, site reports are updated in the EPA’s Air Quality System (AQS) to document compliance with established siting criteria for the new locations.



## Public Comments
Pursuant to Federal regulations, a draft plan is made available 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, 2015 at the SCAQMD ’s Public Information Desk in Diamond Bar, CA. The document is also available on the SCAQ MD website as of May 22 , 201 5 in the drop down menu under the “ Library ”, “ Clean Air Plans ” and “Air Monitoring Network Plan.” ( http://www.aqmd.gov/home/library/clean

- air

- plans/monitoring

- network

- plan )

. The f inal

document is submitted to the EPA on July 1, 201 5 . P ublic comments and responses are also

submitted to EPA to fulfill Fe deral regulatory requirements. No comments were received by the close of the comment period on June 22, 2015.



## Network Design

The SCAQMD operates 39 permanent, monitori ng stations and 4 single

- 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 s were added as part of the near road monitoring network at Ontario Etiwanda and Route 60; Long beach Route 710 and Anaheim. A site was made permanent at Saul Martinez Elementary which monitor s emiss ions from the Salton

Sea T he newest source impact Pb sites were added in January 2010 as required by EPA regulation. During 2014, the Burbank, Ontario Fire Station, and Riverside Magnolia sites were discontinued

due to termination of leases and/or safety concerns

. Table 1 provides a list of monitoring locations,

### Air Quality Monitoring Network Plan

– July, 2015

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

scale and the site type for each monitor at all 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 requirement of the annual network plan, 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.

Background Level monitoring is use d to determ ine general background levels of air pollutants as they enter the SCAB

.

High Concentration monitoring is conducted at sites to determine the highest concentration of an air pollutant in an area within the monitoring network. A monitoring network may

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

Pollutant Transport is the movement of pollutant between air basins or areas within an air basin. Transport monitoring is use d to assess and mitigate upwind areas when tr ansported 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 monitoring is conducted to represent the air pollutant concentrations

that a populated area is exposed to.

Representative Concentration monitoring is conducted to represent the air quality concentrations for a pollutant expected to be similar throughout a geographical area. These

sites do not neces sarily indicate the highest concentrations in the area for a particular pollutant.

Source Impact monitoring is used to determine the impact of significant sources or source categories of air quality emissions on ambient air quality. The air pollutant sou rc es may be stationary or mobile.

Trend Analysis monitoring is useful for comparing and analyzing air pollution concentrations over time. Usually, trend analyses can be used to assess the progress in improving air quality for an area over a period of man y years.

Site Comparison monitoring is used to assess the effect on measured pollutant levels of moving a monitoring location a short distance (usually less than two miles). Some monitoring stations become no longer usable due to development, change of l ease 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 Reporting/Modeling is used to provide data to EPA’s AIRNOW system which reports conditions for air pollutants on a real time basis to the general public. Data is also used to provide accurate and timely air quality forecast guidance to residents of the SCAB.

Multiple purpo ses 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

.

TABLE 1

. List of Monitoring Sites

Location AQS No. Pollutants Monitored Start

Date

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

2 Anaheim Route 5 Near

Road 2 060590008 CO, NO2 0 1/14

3 ATSF (Exide) 060371406 Pb 01/99

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

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

6 Big Bear 060718001 PM2.5 02/99

7 Burbank 1 060371002 CO,NO2,SO2,O3,PM10,PM2.5 10/61

8 Closet World (Quemetco) 060371404 Pb 10/08

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

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

11 Crestline 060710005 O3,PM10 10/73

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

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

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

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

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

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

18 Long Beach (Hudson) 060374006 CO, NO2,SO2,O3,PM10 0 1/10

19 Long Beach Route 710

Near Road 2 060374008 NO2, PM2.5 0 1/15

20 Long Beach (North) 060374002 PM2.5 10/62

21 Long Beach (South) 060374004 PM10,Pb,PM2.5,SO4 06/03

2 2 Los Angeles (Main St.) 060371103 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO4 09/79

2 3 Mira Loma (Van Buren) 060658005 CO,NO2,O3,PM10,PM2.5 11/05

2 4 Mission Viejo 060592022 CO,O3,PM10,PM2.5 06/99

2 5 Norco 060650003 PM10 12/80

2 6 Ontario Fire Station 1 060710025 PM10,PM2.5 01/99

2 7 Ontario Etiwanda Near

Road 2 060710026 CO, NO2 0 6/14

2 8 Ontario Route 60 Near

Road 2 060710027 NO2, PM2.5 0 1/15

2 9 Palm Springs 060655001 CO,NO2,O3,PM10,PM2.5 04/71

1 Site terminated in 2014.

2 New site in 2014.

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4 TABLE 1. (cont) List of Monitoring Sites

Location AQS No. Pollutants Monitored Start

Date

29 Pasadena 060372005 CO, NO2, O3, PM2.5 0 4/82

30 Perris 060656001 O3,PM10 05/73

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

32 Pomona 060371701 CO,NO2,O3 06/65

33 Redlands 060714003 O3,PM10 09/86

34 Rehrig (Exide) 060371405 Pb 11/07

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

36 Riverside (Magnolia) 1 060651003 CO,NO2,Pb,PM10,PM2.5,SO4 10/72

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

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

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

40 SA Recycling 2 Unavailable TSP, Cr6 06/12

4 1 Saul Martinez Elementary 2 060652005 PM10, H2S 0 1/11

4 2 Temecula 060650016 O3, PM2.5 06/10

4 3 Uddelholm (Trojan Battery) 060371403 Pb 11/92

4 4 Upland 060711004 CO,NO2,O3,Pb,PM2.5,PM10,SO4 03/73

4 5 West Los Angeles 060370113 CO,NO2,O3 05/84

1 Site terminated in 2014.

2 New site in 2014.

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5 TABLE 2

. FRM/FEM Criteria Pollutant Spatial 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

– Gene ral Background

Location CO NO2 SO2 O3 Manual

PM10 Manual

PM2.5 Pb

Anaheim NS/PE US/PE NS/PE NS/PE NS/PE

Anaheim Route 5 Near

Road 2 MI/HC MI / HC

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 1 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/BK MS/PE/BK NS/PE/BK N S/PE/BK NS/PE/BK NS/PE/BK Long Beach ( Hudson ) NS /HC NS /PE NS/HC N S/PE NS /PE
Long Beach ( North ) NS/HC Long Beach Route 710 Near

Road 2 MI/HC MI/HC

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 1 NS/HC NS/PE

Ontario Etiwanda Near

Road 2 MI/HC MI/ HC

Ontario Route 60 Near

Road 2 MI/HC MI/HC

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 1 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
South Long Beach NS/HC NS/ HC NS/HC

SA RECYCLING HC /IM

Temecula NS/HC
Uddelholm (Trojan Battery) MI/IM
Upland NS/PE NS/PE NS/PE NS/PE
West Los Angeles NS/PE MS/HC N S/PE

1 Site terminated in 2014.

2 New site in 2014.

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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

– Pollutant Transport TR

– Trend Analysis

EX

– Population Exposure CP

– Site Comparisons

SO

– Source Impact CO

- Collocated

Location CO NO2 SO2 O3 Manual

PM10 Manual

PM2.5 Pb

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

Anaheim Route 5 Near Road 2 SO /HC SO /HC
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 1 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 (Hudson) TR TR/RC TR/HC TR TR/RC Long Beach (North) EX/HC Long Beach Route 710 Near

Road 2 SO/HC SO/HC

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 1 HC/CO EX/RC

Ontario Etiwanda Near Road 2 SO/HC SO/HC

Ontario Route 60 Near Road 2 SO/HC SO/HC
Palm Springs TP/RC TP/RC TP TP/HC EX/TP

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

Perris TP TR

Pico Rivera #2 RC HC HC EX/RC EX

Pomona RC RC HC

Redlands TP/RC TP/RC Rehrig (Exide) SO/CO

Reseda RC TR/RC HC EX/RC

Riverside 1 HC TR/RC EX/HC EX/CO

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

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

Santa Clarita RC TP/RC TP/HC RC EX/RC South Long Beach HC EX /SO EX

SA RECYCLING SO/HC Uddelholm (Trojan Battery) SO

Temecula TR/HC Upland RC TR/RC TR/RC EX West Los Angeles RC TR/HC RC

1 Site terminated in 2014.

2 New site in 2014.

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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)

BK

- Background BAM (FEM)

MONITORING PURPOSE

SO

– Source Impact RM

– Real

- Time Reporting/Modeling

TP

– Pollutant Transport SPM

– Special Purpose Monitoring

TR

– Trend Analysis CO

- Collocated

Location Continuous PM10 Continuous PM2.5 PM10

– 2.5

Type Purpose Site

Type Scale Type Purpose Site Type Scale Operational

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

- FEM RM PE NS

Burbank 1 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

Route 710 Near

Road 2 BAM/FEM RM/SO

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

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

Ontario Route 60

Near Road 2 BAM/FEM RM/SO

Palm Springs TEOM /FEM RM /TP HC NS

Reseda BAM/NON

- FEM RM PE NS

Riverside 1 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 Yes

San

Bernardino TEOM /FEM RM /TR HC NS

Santa Clarita BAM/NON

- FEM RM PE NS

Saul Martinez Elementary TEOM /FEM RM/CO 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

1 Site terminated in 2014.

2 New site in 2014

.

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8 A brief description of the criteria pollutant 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. Figure 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 19 sites to me et the requirements for PM10 Federal Reference Method ( FRM ) sampling

. The PM10 monitoring

network contains five site s within 25% of the Federal NAAQS as shown in the 2014 Air Quality Data Table ( http://www.aqmd.gov/home/library/air

- quality

- data

- studies/historical

data

- by

- year ) , Figure 9

. The Indio , Mira Loma and Rubidoux sites are designated PM10

collocated and shown in Table 24

. All PM 10 FRM monitors operate on a one day in six day schedule, with the exception of Indio , Mira Loma and Rubidoux which operate on one day in three day schedule. The Anaheim and Mira Loma sites are shown as expected

maximum value sites by MSA in Table 18. Consequently, as expected maximum concentration sites, Mira Loma and Anaheim meet the minimum sampling schedule requirement shown in 40 CFR §58.12 . The remaining sites meet or exceed the minimum 6 day sample schedule requirement.

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

- time devices are capable of making hourly particulate concentration measurements. Table 4 describes the monitor type, site type

, monitoring purpose, and spatial scale for continuous parti culate analyzers. F igure 2 in Appendix A shows the sp atial 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 ha s caused exceedances of the twenty

- four hour s tandard during exceptional events . In downwind areas of the SCAB , a large fraction of particulate 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 where possible

. The 24 hour FRM PM10 sampler remains the primary analyzer used for attainment purposes.

PM10

- 2.5

PM10

- 2.5 (PM Coarse) is required at NCore sites only and is derived from the continuous

BAM PM10 and PM2.5 particulate monitors at those sites. The Purpose, Site Type and

Scale are similar to the continuous PM10 and PM2.5 instruments from which data is

calculated. PM Coarse is currently measured at the Los Angeles (Main St.) and Rubidoux

sites and is shown in Table 4.

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9 NITROGEN DIOXIDE (NO2)

The area wide NO 2 network consists of 23 sites . These sites are mostly located in areas of highest expected NO 2 concentration s

. The Near Road monitoring network consists of four

sites which were implemented in January of 2014 and 2015. These sites are located adjacent to the most heavily traveled roadways identified in the basin. The spatial distribut ion 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 locations to pro tect 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 requirement (58 .10[a][5]). On September 30, 2013 , the continuous monitors including NO2 were discontinued at Long Beach (North) due to termination of the lease by owner. SCAQMD is proposing re

designation of Compton as a RA 40 site and is discussed further in Appendix D. SCAQMD is in the process of identifying a replacement monitoring location for Long Beach (North) in collaboration with Long Beach Department of Public Health and also considering potential consolidation with nearby sites. Review of 1992 through 2012 NO 2 data shows the State and

Federal standards for NO2 were not exceeded.

CARBON MONOXIDE (CO)

Area wide CO monitors measure concentrations at 2 3 locations , and 2 near road monitors

operate within the SCAQMD ambient air monitoring network . Figure 4 in 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 3 shows

State and Federal standards for CO were not exceeded.

SULFUR DI OXIDE (SO2)

SO2 monitors are located at 6 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 sources are located.

On June 22, 2010 EPA strengthened the SO2 National Ambient Air Quality Standard (NAAQS) . Network design requirements included new minimum requirements be determined by the Population Weighted Emissions Index (PWEI)

.

The PWEI shall be calculated by States for each 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 calcul ated by multiplying the population of each CBSA, using the most current census data or estimates, and the total amount

of SO2 in tons per year emitted within the CBSA area, using an aggregate of the most recent county level emissions data available in the National Emissions Inventory (NEI) for each county in each CBSA. The resulting product shall be divided by one million, providing a PWEI value, the units of which are million

persons

- tons per year. For any CBSA with a calculated PWEI value equal to or

grea ter than 1,000,000, a minimum of three SO2 monitors are required within that CBSA. For any CBSA with a calculated PWEI value equal to or greater than

### Air Quality Monitoring Network Plan

– July, 2015

10 100,000, 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.

PARTICULATE LEAD

Total Suspected P articulate (TSP) Pb measurements are collected at 1 2 sites as part of the particulate network; 4 of the sites are Source Impact for Pb, and the remaining 8 sites

measure ambient Pb

.

In 1990, the EPA requested that the SCAQMD 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 fac ility in the City of Torrance ended in 1993 when measurements were consistently below the ambient standard. Sampling ended at a facility in the City of Commerce in 2006 when

the business was closed. Out of the facilities currently being monitored, the fa cility 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.

The Rehrig (Exide) microscale site typically measures the highest Pb concentrations in the monitoring network. A notice of violation issued was on April 23, 2014 for, “ Discharging into the atmosphere lead emissions exceeding 0. 150 μg/m3 averaged over 30 days”

. On March 11, 2015, Exi de agreed to immediately and permanently close the Vernon site in an agreement with the assistant U.S. attorney and chief of environmental crimes. Monitoring continues at the site and it 

### h as been designated as a collocated monitoring

location for the sour ce oriented Pb monitoring network. The Los Angeles, and Compton sites are designated as collocated for the area wide Pb monitoring network; collocation requirements are shown in Table 24

. During 2014 the Riverside site was designated as a

collocated site for Pb but on 3/17/15 the lease was not renewed due to safety considerations

. Since that time, the Compton site has been re

- designated as a collocated site for Pb. The SCAQMD continues to exceed the minimum monitoring requirements with the closure of

the Riverside monitoring site. The spatial distribution of these sites is shown in Figure 6 in Appendix A

.

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11 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 continues at the sites surrounding the Exide (Vernon), Que metco (Industry), and the Trojan Battery facilities. Existing urban Pb monitoring conducted at Compton, LAX Hastings, 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 Pb monitoring was required , and a more recent emissions inventory showed Pb emissi ons less than the minimum monitoring requirement of 1 .0 ton per year

. The landowner advised SCAQMD the lease would not be renewed at the end of the three year contract period. Data review from the Van Nuys Airport

Pb site showed no exceedances of the thr ee month rolling average during the monitoring period. In consultation EPA the site was discontinued on June 4, 2013 based upon conditions cited in 40 CFR 58 Appendix D 4.5.

The most recent NEI data (20 11 ) as of 5/1 /2015 show s no sites exceed the 1 .0 tpy requirement http://www.epa.gov/ttnchie1/net/2011inventory.html ) threshold requiring a monitoring plan:

TPY State County Facility

0.8 CA Los Angeles LONG BEACH

- DAUGHERTY

FIELD AIRPORT

0.68 CA Los Angeles VAN NUYS AIRPORT

0.58 CA Orange JOHN WAYNE AIRPORT

0.58 CA San Bernardino CHINO AIRPORT

Photochemical Assessment Monitoring Stations

The Photochemical Assessment Monitoring Stations ( PAMS ) network was initiated in June 1994 at Pico Rivera and Upland . During 1995 sites were established at Banning and Azusa to determine speciated hydrocarbon O 3 precursor compounds in ambient air. PAMS monitoring at Hawthorne commenced in June 1997 and the B urbank 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 s tation moved to a new location one half mile south of the previous site, also due to the end of the property lease.

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

in 40 CFR § 58 . The changes made to the rule were to implement recommendations made by the PAMS workgroup formed to assess the program. The workgroup recommended changes be made to site type and monitoring objectives. During September 2008, a report from the EPA PAMS network assessment project workgroup wa s 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

### Air Quality Monitoring Network Plan

– July, 2015

12 redundant, ineffective, or unnecessary sites, and to assess other enhanced O 3 monitoring activities that may prove useful.

Site Types are defined as:

 Type 1 sites are established to characterize upwind background and transported O3 and its precursor concentrations entering the area and will identify those areas which are subjected to transport.

 Type 2 sites are established to monitor the magnitude and type of precursor emissions in the area where maximum precursor emissions are expected to impact and are suited for the monitoring of urban air toxic po llutants

.

 Type 3 sites are intended to monitor maximum O3 concentrations occurring downwind from the area of maximum precursor emissions.

 Type 4 sites are established to characterize the downwind transported O3 and its precursor concentrations exiting the area and will identify those areas which are potentially contributing to overwhelming transport in other areas

.



### 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 monitoring network:

 Burbank was reclassified from Type 2/1 to Type 2. This change addressed the National PAMS Network Assessment observation that Burbank should be reclassified to a Type 2 precur sor site. The recommendation is consistent with the heavily urbanized/industrialized area, which is impacted by high levels of O3 precursor

emissions.

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

Network Assessment observed that Santa Clarita was consistent with a Type 2 site, recent data was more consistent with a Type 3 maximum O3 concentration site rather than a Type 2 O3 precursor site.

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

Asses sment 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 monitoring platform and equipment to meet the objectives of multiple programs. Los Angeles (Main) is also a National Air Toxics Trends Station (NATTS), a

National Core

- Multi

- pollutant Monit oring Station (NCore), and a Speciation Trends Network (STN) site.

 Azusa was reclassified from Type 3 to Type 2. This proposed change addresses the National PAMS Network Assessment observation that Azusa has high Volatile Organic Compounds (VOC) and Oxide s of Nitrogen (NOX) concentrations, with lower O3 concentrations. The site now more closely resembles a Type 2 O3 precursor site.

 Upland was relocated to the Rubidoux site. The National PAMS Network Assessment observed that Upland was no longer consisten t with a Type 4 site and recommended reclassification to Type 3. SCAQMD relocated the Upland PAMS site to Rubidoux as

### Air Quality Monitoring Network Plan

– July, 2015

13 a Type 3 location where synergies can be created among the NATTS , NCore, and the STN programs.

 LAX Hastings and Pico Rivera remained unch anged.

Currently, manual VOC canisters are in operation at the Azusa, LAX Hastings, Rubidoux, Los Angeles (Main)

, and Santa Clarita air monitoring stations. Under this program , d uring the intensive season from July 1 until September 30, VOC canisters we r e 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 were run every 6th day.

SCAQMD upper air meteorological monitoring stations are established at Los Angeles International Airport (LAX), Ontario International Airport (ONT), Moreno Valley (MOV) at the Moreno Valley Municipal Water Treatment Plant in Riverside County, Irvine (IRV) at the University of California Research and Extension Center, and Pacoima at Whiteman Airport (WHP). The upper air stations use a combination of remote sensing and surface meteorological instrumentation, including the Scintec (formerly Radian/URS and

Va isala) LAP

- 3000 radar wind profiler with a Radio Acoustic Sounding System (RASS), the Atmospheric Systems Corporation (formerly AeroVironment Inc.) mini Sodar acoustic wind profiler, and tower

- mounted meteorological measurements of wind, pressure,

temperat ure, relative humidity, solar radiation, and ultraviolet radiation. Due to the age of the LAX upper air instrumentation and costly component failures, SCAQMD has replaced the LAX radar wind profiler instrumentation with that from Whiteman Airport. Surfac e meteorology and mini

- Sodar instruments are still operational at the Whiteman Airport upper

air station.

During April 201 3 , a system audit was conducted by the EPA, which asse ssed the SCAQMD

NATTS/PAMS program s . The audit found no major issues with the operation of the

network

.

On November 25, 2014, the EPA proposed to strengthen the National Ambient Air Quality Standards (NAAQS) for ground

- level ozone, based on extensive scientific evidence about

ozone's effects. Proposed changes to the rule include P AMS monitoring requirements in 40 CFR § 58 which includes recommendations made by the PAMS national working group. Proposed changes include (Cavendar, U.S. EPA, 2015):

– R educe number of required sites to 1 per area but expand PAMS applicability to all

O3 non

- attainment areas

– Require PAMS at NCore sites in O3 non

- attainment areas but allow for Regional approval of alternative site (e.g., existing type 2 PAMS sites)

– Require sites to collect hourly VOC data

– Require sites to collect carbonyls (formaldehyde, etc.)

– Require sites to measure “true NO2” in addition to current NOy

– Change requirement for upper air meteorology to requirement for measuring mixing height

### Air Quality Monitoring Network Plan

– July, 2015

14 The proposed rule closed for comment and the final form of the rule is expected to be

released lat er in 2015.

Although SCAQMD has used the PAMS data for trends analysis, trajectory modeling, and source emissions inventory reconciliation, SCAQMD has conducted an assessment of its PAMS program . The assessment indicated that although the existing progra m provides a robust data set, the measurement program can be modernize d to compliment current and

future U.S . EPA program requirements

, strengthening the connection between the PAMS measurements objectives to better comprehension of ozone in the South Coas t Basin . Thus, in the next two years, SCAQMD will focus its resources on optimizing the program

, evaluating technologies, and shift ing resources to prepare for the revised program

. The general concept will be to conduct intensive one

- year large scale Spe cialized PAMS (SPAMS) measurements every several years and in between SPAMS, conduct reduced core PAMS program during non

- intensive years

.

During non intensive years the goal is to track Annual statistics, trends (yearly, seasonally, monthly, weekly, daily, hourly), spatial distribution, comparison to other federal programs,

and compa rison data for special projects. Non intensive monitoring is proposed at four sites:

 Los Angeles (Main street): Proposed required by U.S. EPA, Station Leveraging,

Curren t Type 2 site

 Azusa: Current Type 2 site, Trend site

 Rubidoux : Proposed required by U.S. EPA, Station leveraging, Current Type 3 site.

 Long Beach : P ort/ Refineries activity and emissions

During the p eriodic i nte nsive o ne y ear SPAMS intensive period

, the goal is to conduct

measurements with better spatial resolution ( both vertical and horizontal), establish trend

data (yearly, seasonally, monthly, weekly, daily, hourly)

– develop control strategies, emissions inventory evaluations , local scale studies , full scale photochemical transport modeling, VOC/NOx profiling, and background characterization

. Intensive years would take place on Air Quality Management Plan (AQMP) years. More detail on the SPAMS program will be provided in next year's annual netwo rk plan.

The 2015 PAMS network monitoring objectives and requirements are summarized in Table

6 and Table 23 Figure 7 in Appendix A which shows the distribution of the PAMS network. Starting July 1, 2015 SCAQMD will not conduct the intensive season samp ling schedule for

PAMS sites but will continue the current non intensive schedule for all current PAMS sites. During th is non

- intensive season 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 an d carbonyl sampling. Instead, SCAQMD will be evaluating implementation options for the revised PAMS/ SPAMS programs by participating in the U.S. EPA PAMS GC assessment, upgrading its air monitoring network infrastructure, preparing mobile platforms, and

e valuating instruments and methods.

### Air Quality Monitoring Network Plan

– July, 2015

15 TABLE 6. PAMS Network

January 1 to December 31

Site Type Date

Established as

PAMS Site / AQS ID# VOC Carbonyl Additional Requirements

1 04/01/2004 LAX Hastings (replaced Hawthorne) 1 x 24 hr sample every 6 th

day No Sampling

2 06/01/1995 Azusa 1 x 24 hr sample every 6 th day No Sampling No/NOx required

2 07/01/1997 Burbank 1 x 24 hr sample every 6 th day 1 x 24 hr sample every

6 th day

2 06/01/2009 Los Angeles (Main) 1 x 24 hr sample every 6 th day 1 x 24 hr sample every

6 th day Trace level CO required at one type 2

site.

2 08/01/2005 Pico Rivera #2 1 x 24 hr sample every 6 th day 1 x 24 hr sample every

6 th day

3 06/09/2009 Rubidoux 1 x 24 hr sample every 6 th day No Sampling NOy required

3 05/01/2001 Santa Clarita 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 Speciated VOC only required at type 2 and one other (type 1 or 3)

2

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

or above 8 hr zone

3

– Maximum O3 c oncentration site No type 4 required NO/NOx required only at type 2

4

– Extreme downwind monitoring site NOy required at one site per PAMS area (type 1 or 3)

### Air Quality Monitoring Network Plan

– July, 2015

16 P M2.5
A network of 17 FRM samplers was first implemented in January 1999 . On December 26, 1999, a second Coachella Valley PM2.5 sampling site was established in Palm Springs. On June 20, 2003, PM2.5 sampling began at the South Long Beach site. The Mira Loma site was added during October, 2005 and the Route 710 Long Beach a nd Route 60 Ontario near road sites were added during January, 2015

. During 2014 the Riverside , Burbank, and Ontario sites were discontinued due to termination of leases, This brings the total number of PM2.5 FRM sampling sites to 19 . The sites are depi cted 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 E PA. Collocated sampling sites include Rubidoux, Central Los Angeles, and Mira Loma (Van Buren)

. Of the collocated sites, all

three are located at sites which have exceeded Federal NAAQS as shown in Figure 9, and Appendix A, 2013 Air Quality Data Table . The latest data can be f ound at: ( http://www.aqmd.gov/home/library/air

- quality

- data

- studies/historical

- data

- by

- year ).

M anual PM2.5 monitors are sited as neighborhood scale and population exposure representing community wide air quality with multiple s ites 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. If a PM2.5 network modific ation were to be implemented for a site that was in exceedence of the PM2.5 NAAQS levels, SCAQMD would notify U

. S

. EPA Region IX

via written communication. Public notice of network modifications occurs as part of the annual network plan process which is s tated 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 Met hod ( 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 sampl ing. Daily d esign value sites are shown in

Table 17a as the Los Angeles and Mira Loma sites

. A replacement site is currently being sought for Burbank due to termination of lease and the Mira Loma site meet s the minimum daily monitoring requirement . Monitors exceed the minimum NCore 1 in 3 requirements at
the Rubidoux and Los Angeles (Main) sites. The remaining sites adhere to the 1 in 3 schedule with the exception of Big Bear which was approved at the inception of the PM2.5 program as a 1 in 6 si te. The Federal minimum monitoring requirements for PM2.5 are being met and/or exceeded by the SCAQMD PM2.5 monitoring network

.

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

– 02. Fifteen monitors are now operating in the SCAB , two at Rubidoux ( FEM & Non FEM BAM ), and one each at Anaheim, Los Angeles, South Long Beach, 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, Los

### Air Quality Monitoring Network Plan

– July, 2015

17 Angeles (Main), Mira Loma (Van Buren), Rubidoux, and South Long Beach sites.

Relocated NON

- FEM BAM samplers were installed at Reseda, Ri verside 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 purp ose monitors to

SLAMS under 40 CFR § 58.20

. During 2014 the Burbank and North Long Beach sites were

discontinued due to termination of lease s

.

In 201 4 , SCAQMD conducted a PM2.5 Continuous Monitor Comparability Assessment i n accordance with the PM NAAQS rule published on January 15 th 

### , 2013 (78 FR 3086).

S pecific to the provisions detailed 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. Thus, SCAQMD requested a waiver to exclude PM2.5 continuous monitor data from NAAQS comparison. Meanwhile, SCAQMD is conducting comparison studies of newer technology to determine their ability to meet the criteria to be compared against the NAAQS. At such time when the assessment indicates that the FEM

monitors are with in 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 will be eligible for comparison

to the NAA QS upon U.S. EPA approval.

Coarse particulate matter measurements (PM10

- 2.5) are required at NCore sites. To meet this requirement SCAQMD measures this value utilizing the continuous BAM monitors at the Los Angeles (Main) and Rubidoux air monitoring sit es. These monitors are shown in

Table 4.

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 acceptance criteria under 78 FR 3086

.

### Air Quality Monitoring Network Plan

– July, 2015

18 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 1 BURK 70069 060371002 Closed
Compton COMP 70112 060371302 11/08 1

- in

- 3

Fontana FONT 36197 060712002 01/03/99 1

- in

- 3

Indio INDI 33157 060652002 01/30/99 1

- in

- 3
Long Beach ( North ) LGBH 70072 060374002 01/03/99 Daily Long Beach Route 710 Near

Road 2 W710 70032 06037 4008 01/01/15 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) “A” MRLM 33165 060658005 11/09/05 Daily
Mira Loma (Van Buren) “B” MRLM 33165 06065 8005 03/08/12 1

- in

- 6
Mission Viejo MSVJ 30002 060592022 06/15/99 1

- in

- 3

Ontario Fire Station 1 ONFS 36025 060710025 Closed

Ontario Route 60 Near Road 2 60NR 36036 0607 10027 01/01/15 Daily
Palm Springs PLSP 33137 060655001 12/26/99 1

- in

- 3

Pasadena PASA 70088 060372005 03/04/99 1

- in

- 3

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

- in

- 3

Reseda RESE 70074 060371201 01/24/99 1

- in

- 3

Riverside 1 RIVM 33146 060651003 Closed

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

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

- in

- 6

San Bernardino SNBO 36203 060719004 01/03/99 1

- in

- 3
South Long Beach SLGB 70110 060374004 06/20/03 Daily

1 Closed in 2014.

2 New in 2014 

### 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

PM2.5 is offline then c ontinuous FEM analyzer data can be substituted if the FEM analyzer meets the acceptance crite ria under 78 FR 3086

.

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

Met One SASS PM2.5 and one SCAQMD Met One SASS PM2.5 speciation samplers were deployed in March 2001 at Rubidoux. An additional STN Met One SAS S and collocated SCAQMD SASS samplers were deployed at Central Los Angeles in 2002. In 2003, SCAQMD SASS PM2.5 speciation samplers were installed at Fontana and Anaheim air monitoring sites. Analysis of the filters from the SCAQMD ambient network SASS samplers are being conducted at SCAQMD ’s laboratory. The STN SASS sample filters are shipped to Research Triangle Institute ( RTI ) for analysis. This approach has the concurrence of CARB and EPA, Region IX.

### Air Quality Monitoring Network Plan

– July, 2015

19 N atio 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. SCAQMD has conducted several air toxics measurement campaigns in the past, which demonstrate d the variety and spatial distribution of air toxics sources across SCAB. A single air toxics measurement site cannot reflect the levels and trends of air toxics throughout the SCAB . For this reason, two

NATTS sites are used to characterize the SCAB’ s air toxics levels. The first site is a central urban core site in Los Angeles that reflects concentrations and trends due primarily to urban mobile source emissions. A second, more rural, inland site at Rubidoux captures the transport of pollutants from a v ariety 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 (Main) and Rubidoux air monitoring sites. During April 201 3 , a system
audit was conducte d by the EPA, which assessed the SCAQMD NATTS program. The audit found no major issues with the operation of the network.

NCore
NCore monitoring rules require d that SCAQMD 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, 201 1 and at the Central Los Angeles during May, 2011. Both the Los Angeles and Rubidoux sites are NATTS and PAMS monitoring locations.



## Special Programs
Special monitoring programs are conducted for rule compliance purposes

, to characterize the

levels of tox ic 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 is a highly urbanized area 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. In 1986, SCAQMD conducted the first MATES study to determine the SCAB

- wide risks associated with major airborne carcinogens. At the time, the state of technology was such that only ten known air toxic compounds could be analyzed. In 1998, a second MATES study (MATES II) was conducted; MATES II included a monitoring program of 40 known air toxic compounds, an updated emissions inventory of toxic air contaminants, and a modeling effort to characterize

health risks from hazardous air pollutants. In April 2004, the SCAQMD conducted the third MATES study (MATES III) to assess the ambient levels of airborne compounds linked to adverse health effects in humans. And in June, 2012 SCAQMD began the MATES IV study

and conc luded in June, 2013. A draft final report was issued during 2014 ( http://www.aqmd.gov/home/library/air

- quality

- data

- studies/health

- studies/mates

- iv ) for public comment, and the final report has been released May 1, 2015

.

### Air Quality Monitoring Network Plan

– July, 2015

20 The MATES IV Study included a monitoring program, an updated emissions inventory of toxic air contaminants, and a modeling effort to characterize risk across the Basin. The local

scale component of the study continued to focus on the carcinogenic risk from exposure to air toxics but will not estimate mortality or other health effects from particulate exposures. A

focus of MATES IV is the inclusion of measurements of ultrafine particle concentrations. In addition, shorter

- term measurements are being conducted at various locations to assess localized impacts of combustion sources. The focus of these measurements were on assessing the exposures to ultrafine particles and black carbon ver y near sources such as airports, freeways, rail yards, busy intersections, and warehouse operations.

The goal of MATES IV was 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.

For trend analysis the MATES IV study utilized the same ten fixed monitoring sites used in the MATES III study. These monitoring locations are the Anaheim, Burbank, Compton, Fontana, Huntington Park, North Long Beach, LA Main Street, Pico Rivera, Rubidoux, and West Long Beach monitoring sites. As of June 2013 monitoring at these ten fixed sites has been completed. MATES IV added Ultra Fine Particulate (UFP) and Black Carbon (BC)

continuous measurements.

The Local Scale component to the MATES IV study utilizes mobile monitoring platforms deployed for short term measurements of selected compou nds near sources such as airports, freeways, rail yards, busy intersections, and warehouse operations.

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 ongoing program to collect ambient h exavalent chromium samples 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 jurisdiction

.

GERDAU

- TAMCO

GERD AU North America acquired the TAMCO Rancho Cucamonga steel mini mill in October, 2010. In 2012 an environmental audit was conducted at the facility and found discrepancies in reported emissions with respect to SOx and NOx

. Further, it was suspected

that Pb emissions can contribute to an exceedence of the NAAQS. SCAQMD conducted inspections of the facility to address issues and continues monitoring for Pb

, Cr+6 , and other

metals at the facility. Monitoring efforts at TAMCO currently measure Pb, Total M etals and Cr+6 on a 3 day schedule.

### Air Quality Monitoring Network Plan

– July, 2015

21 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 the Salton Sea and into the Temecula Valley. The following day, SCAQMD received over 235 complaints of sulfur and rotten egg type odors

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

- scale odor events to occur. SCAQMD has installed PM10 and H2S air monitors at Saul Martinez Elementary School and the Imperial Irrigation District’s Torrez

- Martinez site to monitor the type of expected nuisance pollutants which are rele ased from the Salton Sea. The primary objective of this monitoring network is to place monitoring resources at a lakeside location 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. During 2015 the Saul Martinez Elementary School site will transition to become part of the permanent ambient air monitoring network.

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

the South Coast Air Basin PM levels.

AllenC o Allen C o is an oil field and ga s production facility located in the City of Los Angeles surrounded by residences including low income housing units, F.D. Lanterman high school, and Mount Saint Mary’s College. For several years SCAQMD i nspectors have responded to numerous odor complaints from the local community and suspects AllenC o to be the source

of these odors. In October 2013 the SCAQMD initiated monitoring at sites around the

AllenC o facility. At Mt

. St Mary’s College regularly scheduled VOC samples are collected,

and continuous Non

- Methane Hydrocarbon measurements are also being collected. On the roof of the low income housing building across the street from Allen C o, there is a remote
controlled sam pler capable of collecting a VOC grab sample should an odor complaint be called into the SCAQMD odor complaint line. In November 2013 Allen C o temporarily shut down operations to repair issues which it believes were the cause of the previous odor complaint s. SCAQMD continues to monitor continuous Non

- Methane Hydrocarbon Measurements as well as VOC samples.

Duarte To better assess expansion of rock and quarry operations and its impact on residents of

Duarte

, SCAQMD began continuous PM10 monitoring on May 2 1, 2013. The study

assess es levels of PM10 in the City of Duarte. SCAQMD is in the process of discussing with the city of Azusa for potential monitoring.

CPV Se nt i n e l To better assess potential emission impacts from the CPV Sentinel power plant to the Desert Hot Springs area, SCAQMD has installed and is now operating an air pollution monitor

### Air Quality Monitoring Network Plan

– July, 2015

22 directly downwind of the power plant at a Mission Springs Water District well site. Monitoring began on May 23 , 2014 and measure s levels of fine particulates (PM2.5 ) on a continuous basis, providing real

- time hourly data ( http://www.aqmd.gov/home/library/air

quality

- data

- studies/special

- monitoring/cpv

- sentinel

- monitoring )

.

Carlton Forge Carlton Forge Works (CFW) operates furnaces, presses and grinders at its facility in Paramount to manufacture large metal rings used by ae rospace and other industries. As part

of its on

- going investigation of air quality complaints and community concerns about potential burnt metal odors and emission from CFW, SCAQMD has deployed TSP monitors

to monitor for metals. Based on the results of a ir sampling to date, SCAQMD has found ambient levels of some metals measured on few days in August, September and October 2013 at concentrations significantly higher than average levels measured throughout the basin. However, more recent measured ambient c oncentrations have declined.



## Recent or Proposed Modifications to Network

Near Roadway NO2 Monitoring On February 9, 2010, U.S. EPA promulgated new minimum monitoring requirements for the NO2 monitoring network in support of newly revised 1

- hour NO2 NAAQ S 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

- r oad environment in larger urban areas. On March 7, 2013

EPA revised the new monitoring 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 were required to consider traffic volumes, fleet mix, roadway design, traffic congestion patterns, local terrain or topography, and meteorology in determining where a required near

- road NO2 monitor should be placed. In addition to those required considerations, there are other factors that impact the selection and implementation of a near

- road monitoring station including satisfying siting criteria, site logistics (e.g., gaining access to pr operty and safety), and population exposure.

The primary objective of the near

- road NO2 network is to place monitoring resources on near

road locations where peak, ambient NO2 concentrations are expected to occur as a result of on

road mobile source emissions. Monitoring at such a location or locations within a particular urban area will provide data that can be used for comparison to the NAAQS and to assess population exposures for those who live, work, play, go to school, or commute within the near

- roadway environment. Population density for SCAQMD is shown in Figure A. 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 nea r

- 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 relative wor st case population exposures that may be occurring in the near

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

### Air Quality Monitoring Network Plan

– July, 2015

23 Minimum monitoring requirements are specified in 40 CFR 58 Appendix D. EPA requires state and local air agencie s 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 o f 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 B.

The near roadway grant guidance directed imp lementation of near road sites be conducted in phases. The first of the Phase I sites became operational on January 1, 2014 in Anaheim adjacent to the 5 freeway (FE AADT #3, 2013). The Second Phase I site is located in Ontario adjacent to

Interstate 10/ Interstate 15 (FE AADT #11, 2013) and began collecting data July, 2014

. Phase II

sites began collecting data on January 1, 2015. Sites are located along Route 710 in Long Beach (FE AADT 22, 2014) and along Route 60 in Ontario (FE AADT #9, 2014).

F igure A

– SCAQMD Population Density

### Air Quality Monitoring Network Plan

– July, 2015

24 The SCAQMD jurisdictional boundary encompasses two MSAs and two CBSAs whose boundaries and codes mirror those of the MSAs as defined by the U.S. Office of Management and Budge t. The Los Angeles

- Long Beach

- Anaheim MSA \ CBSA (Code 31080 ) has an estimated population of 13, 131

, 431 and the Riverside

- San Bernardino

- Ontario MSA \ CBSA (Code 40140) has an estimated population of 4,3 8 0, 878 according to the most recent U.S. Census estimates

available for 201 3 . The minimum number of monitors required for near road monitoring is based

on MSA \ CBSA population and shown in Table 8

. Figure B

- Monitoring Requirements

### Air Quality Monitoring Network Plan

– July, 2015

25 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 Near Roadway NO2 Technical Assistance Document (TAD) ( June , 201 2 ). The process for ranking candidate road segments is outlined in Figure C

.

The candidate road segment ranking process incorporated the following EPA TAD considerations:

Figure C

– Ranking Candidate Road Segments

### Air Quality Monitoring Network Plan

– July, 2015

26 FE AADT

– A s ingle metric to compare road segments, accounting for AADT and fleet 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 tota l 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 H Dm 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). During 2013, and again in 2014, t he top 50 FE AA DT segment candidates were calculated based on the latest (2012) California Department of Transportation AADT counts at the

time a decision was made on site location ( http://traffic

- counts.dot.ca.gov/ )

. Tr affic counts are shown in Table 9

.

### Air Quality Monitoring Network Plan

– July, 2015

27 TABLE 9

. Top Fifty FE AADT Candidate Roadway Segments

FE

ADDT

Rank HD

Rank AADT

Rank FE

AADT AADT

Total (2012) Total

Trucks (HD) Total

Truck

% County Post

mile Route
Description

1 15 4 754464 348000 25404 7.3 LA 23.56 60 DIAMOND BAR, JCT. RTE. 57

2 1 59 705536 260000 27846 10.71 LA 9.612 605 SANTA FE SPRINGS, JCT. 5

3 2 66 691976 255000 27311 10.71 LA 13.569 605 WHITTIER, JCT. RTE. 72

4 41 3 680560 362000 19910 5.5 ORA 34 5 SANTA ANA, JCT. RTES. 22 & 57

5 5 72 678400 250000 26775 10.71 LA 17.407 605 INDUSTRY, JCT. RTE. 60

6 14 45 674576 266000 25536 9.6 ORA 38.915 5 LINCOLN AVENUE

7 24 20 669968 292000 23623 8.09 LA 7.653 605 NORWALK, JCT. RTE. 105

8 16 50 669504 264000 25344 9.6 ORA 36.258 5 KATELLA AVENUE

9 3 117 656768 222000 27173 12.24 SBD 4.58 60 ONTARIO, JCT. RTE. 83

10 4 118 653800 221000 27050 12.24 SBD 2.366 60 CENTRAL AVENUE

11 17 78 646804 245300 25094 10.23 SBD 9.936 10 ONTARIO, JCT. RTE. 15

12 18 79 646804 245300 25094 10.23 SBD 11.132 10 ETIWANDA AVENUE

13 22 67 638048 254000 24003 9.45 LA 11.711 60 INDUSTRY, JCT. RTE. 605

14 8 120 636424 217000 26214 12.08 SBD 0 60 LOS ANGELES/SAN BERNARINO COUNTY LINE

15 23 64 635304 257000 23644 9.2 ORA 5.258 91 ANAHEIM, STATE COLLEGE BLVD

16 10 121 633488 216000 26093 12.08 LA 29.392 60 POMONA, JCT. RTE. 71,

17 28 31 627616 278000 21851 7.86 LA 44.014 5 LOS ANGELES, JCT. RTE. 210

18 11 125 625736 215000 25671 11.94 SBD 5.855 60 GROVE AVENUE

19 19 109 623760 226000 24860 11 SBD 24.24 10 COLTON, JCT. RTE. 215

20 20 105 621920 230000 24495 10.65 LA 20.428 60 ROWLAND HEIGHTS,

21 52 5 620400 330000 18150 5.5 ORA 30.263 5 TUSTIN, JCT. RTE. 55,

22 6 165 619008 192000 26688 13.9 LA 12.97 710 LONG BEACH, JCT. RTE. 91

23 34 27 613312 280000 20832 7.44 LA 36.358 5 LOS ANGELES, JCT. RTE. 170

24 25 85 608520 243800 22795 9.35 ORA 42.1 5 FULLERTON, JCT. RTE. 91

25 31 51 605296 264000 21331 8.08 ORA 2.615 91 BUENA PARK, JCT. RTE. 39 BEACH BLVD

### Air Quality Monitoring Network Plan

– July, 2015

28 TABLE 9 (continued). Top Fifty FE AADT Candidate Roadway Segments

FE

ADDT

Rank HD

Rank AADT

Rank FE

AADT AADT

Total (2012) Total

Trucks (HD) Total

Truck

% County Post

mile Route
Description

26 13 161 603728 194000 25608 13.2 SBD 27.296 10 MOUNTAIN VIEW AVENUE

27 9 175 602640 184000 26165 14.22 LA 10.823 710 LONG BEACH, DEL AMO

28 36 40 599456 268000 20716 7.73 LA 13.094 91 LONG BEACH, CHERRY

29 35 43 598936 267000 20746 7.77 LA 39.361 5 LOS ANGELES, JCT. RTE. 118

30 61 8 591552 316000 17222 5.45 LA 17.17 101 LOS ANGELES, JCT. RTE. 405

31 38 52 590512 264000 20407 7.73 LA 11.681 91 LONG BEACH, JCT. RTE. 710

32 12 179 588112 178000 25632 14.4 LA 9.41 710 LONG BEACH, JCT. RTE. 405

33 40 55 586048 262000 20253 7.73 LA 14.618 91 BELLFLOWER, JCT. RTE. 19

34 47 38 583128 273000 19383 7.1 ORA 3.258 91 FULLERTON, HARBOR

35 27 112 577376 224000 22086 9.86 LA 25.464 60 DIAMOND BAR, JCT. RTE. 57 NORTH

36 44 60 573248 260000 19578 7.53 LA 9.87 110 LOS ANGELES, JCT. RTE. 91

37 65 22 560512 290000 16907 5.83 LA 5.046 605 CERRITOS, JCT. RTE. 91

38 51 54 560088 263000 18568 7.06 LA 36.41 210 DUARTE, JCT. RTE. 605,

39 74 16 559736 299000 16296 5.45 LA 19.99 101 ENCINO AVENUE

40 107 1 558700 377500 11325 3 ORA 20.751 405 JCT. RTE. 22 EAST,

41 29 139 555744 210000 21609 10.29 SBD 13.169 10 FONTANA, CHERRY AVENUE

42 96 7 552120 321000 14445 4.5 ORA 9.187 91 JCT. RTE. 55 SOUTH

43 63 32 551104 278000 17069 6.14 ORA 15.6 57 ANAHEIM, JCT. RTE. 91,

44 32 128 549552 214000 20972 9.8 LA 20.189 605 BALDWIN PARK, JCT. 10

45 108 2 547600 370000 11100 3 ORA 24.044 405 SEAL BEACH, JCT. RTE. 605

46 90 14 545400 303000 15150 5 ORA 11.54 91 PERALTA, JCT. RTE. 90

47 67 36 544728 275000 16858 6.13 LA 41.597 5 LOS ANGELES, JCT. RTE. 405

48 21 200 544360 155000 24335 15.7 RIV 0.491 60 JCT. RTE. 15

49 26 174 541076 185300 22236 12 SBD 29.313 10 ALABAMA STREET OC

50 43 111 539288 225000 19643 8.73 LA 15.692 710 LYNWOOD, JCT. RTE. 105

### Air Quality Monitoring Network Plan

– July, 2015

29 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 quantifyi ng station siting considerations. 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 consideration 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 terrain and roadway. The least desirable attributes include deep cut

- sections sign ificantly 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 edge 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 for near

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

Meteorology

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

relative downwind locations

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

Roadside Structures

– Co nsiders 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 pr esence of sound walls, mature vegetation (high and thick) or obstructive buildings.

Terrain

– Can affect pollutant dispersion and local atmospheric stability. The most desirable terrain is flat or gentle terrain, within a valley, or along road grade. T he 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, 2015

30 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). Completely 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 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 Los Angeles

- Long B ea ch

- Anaheim MSA \ CBSA (Code

31080 ) and the Riverside

- San Bernardino

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

.

### Air Quality Monitoring Network Plan

– July, 2015

31 TABLE 1 1

. Los Angeles

- Long Beach

- Santa Ana MSA \ CBSA

### Air Quality Monitoring Network Plan

– July, 2015

32 TABLE 1 2 . Riverside

- San Bernardino

- Ontario MSA \ CBSA

### Air Quality Monitoring Network Plan

– July, 2015

33 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 latest congestion data

available for the Los Angeles, Orange, and the Riversid e

- San Bernardino

- Ontario MSA \ CBSA

used when site locations were decided

. Data is shown in the following table as reported by the California Department of Transportation and can be found at ( http://www.dot.ca.gov/hq/traffops/sysmgtpl/MPR/index.htm ).

TABLE 1 3

. Top Congested Freeways Los Angeles County

TABLE 1 4

. Top Congested Freeways Orange County

### Air Quality Monitoring Network Plan

– July, 2015

34 TABLE 1 5

. Top Congested Freeways Riverside & San Bernardino Counties

Sites were selected based on their ranking in the scoring matrix . A review of the latest data available (2013) shows variation in AADT traffic counts however site selection s remain consistent when ancillary considerations are taken into account. O ther consideratio ns involved in the site selection process as directed in the Near Road Technical Assistance Document include:

Safety

- Near

- road monitoring sites must be accessible to station operators in a safe and legal manner, and not pose safety hazards to drivers, p edestrians, 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.

On December 14, 2012, U.S. EPA strengthened the NAAQS for PM2.5 and as pa rt of the revision s, a requirement was added to monitor near heavily trafficked r o a ds in large urban areas. Particle pollution may be higher along these roads as a result of emissions from cars and heavy

- duty diesel

trucks and buses. The U.S. EPA requirement is for one near

- roadway PM2.5 monitor to measure in each CBSA with a population of 1 million or more. The monitor s were to be phased in for the largest CBSAs (population of 2.5 million or more ) by January 1, 2015. SCAQMD has timely

installed t wo monitors, whose locations were selected based upon the existing near roadway NO2 site per CBSA that was ranked higher for heavy duty diesel traffic. Thus, the 710 freeway site in Long Beach was sele c ted for the Los Angeles

- Long Beach

- Anaheim CBSA

, and the Route 60 site

in Ontario was selected for the Riverside

- San Bernardino

- Ontario CBSA.

During June, 2014 an Annual Network Plan Workshop was conducted at SCAQMD’s Diamond

Bar office to solicit input from stakeholders

. SCAQMD staff presented and held a discussion on

### Air Quality Monitoring Network Plan

– July, 2015

35 SCAQMD’s selection of near road sites. W ritten comments were received in 2013 by the National Defense Resources Council (NRDC) regarding support for placing a site along the 710 freeway for a Los Angeles

- Long Beach

- Anaheim CBSA near road monitoring location.

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 outfitted t o replace the existing trailer

. SCAQMD is working with San Bernardino County Planning, Building and Safety departments to receive approval for construction plans.

Cons truction is anticipated during fall 2015; however the schedule is dependent upon the approval

and contract process.

West LA SCAQMD has been operating the West LA site since 1983 . The deteriorating state of the shelter along with compromises made to the s iting 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 outfitted t o replace the existing platform. However, due to recent legislation, the SCAQ MD lease is under review by the Veterans Administration. Construction schedule is dependent upon pending lease review.

Riverside Magnolia SCAQMD has been operating the Riverside Magnolia site since October, 1972 . The deteriorating

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

, and safety issues

, made it necessary to close the site during March, 2015

. SCAQMD in consultation with EPA Region IX is assessing the relocation of the site in the 5 year network ass essment

.

Burbank SCAQMD has been operating the Burbank site since October, 1 961

. Due to the termination of the lease by owner, the site was shut down June , 2014

. SCAQMD is working with Los Angeles County to find a suitable location for monitoring with in 2.5 miles of the previous location. SCAQMD is in consultation with EPA Region IX and is assessing the relocation of the site in the 5 year network assessment.

Ontario Fire Station SCAQMD has been operating the Ontario site since January, 1999

. Due to the termination of lease by the owner, the site was shut down June , 2014

. SCAQMD is working to find a suitable location for monitoring or consolidation with nearby sites . SCAQMD is in consultation with EPA Region IX and is assessing the relocation of the site in the 5 year network assessment.

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

- monitoring

network. Recent construction of the buildings adjacent to the site potentially compromises the siting criteria. During the FY 2015

- 16 a data comparison between a more centralized monitoring

location in Long Beach will be undertaken. If comparison of data between the tw o locations

### Air Quality Monitoring Network Plan

– July, 2015

36 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.

Long Beach (North) At the request of the owner, the Long Beach (North) site lease was terminated on September 30,

2013. As a result s o me pollutants were discontinued while a replacement site is sought. Consideration is being given to consolidation with nearby sites to bett er represent the Long Beach area and will be addressed in the 5 year network assessment.



## Minimum Monitoring Requirements

The SCAQMD jurisdictional boundary encompasses two MSA s and two 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

- Anaheim MSA \ CBSA (Code 31 080 ) has an estimated population of 13, 131,431 and the Riverside

- San Bernardino

- Ontario MSA \ CBSA (Code 40140)

has a n estimated population of 4,3 8 0, 878 according to U.S. Census estimates for 201 3 . 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 Quality Assurance Organization (PQAO) and

the network exceeds the mi nimum monitoring requirements for all criteria pollutants. Details are provided below.

### Air Quality Monitoring Network Plan

– July, 2015

37 Table 1 6 Minimum Monitoring Requirements for Ozone.

(Note: Refer to section 4.1 and Table D

- 2 of Appendix 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

3 0180 Los Angeles

Orange 13, 131,431

2013 9 7

201 2

- 201 4 Santa Clarita

060376012 4 1 6 0

40140 San Bernardino

Riverside 4,3 80,878

2013 10 2

201 2

- 201 4 Redlands

060714003 3 13 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 Monitoring 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

30180 Los Angeles

Orange 13, 131,431

2013 12. 4

201 2

- 201 4 Los

Angeles

060371 103 3 2

201 2

- 201 4 Los

Angeles

060371103 3 10 0

40140 San Bernardino

Riverside 4,3 80,878

2013 14. 7

201 2

- 201 4 Mira Loma

060658005 3 8

201 2

- 201 4 Mira Loma

060658005 3 9 0

1 DV Years

– The three years over which the design value was calculated

. Monitors required for SIP or Maintenance Plan: 19

### Air Quality Monitoring Network Plan

– July, 2015

38 Table 1 7 b Minimum Monitoring 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) Daily

Design

Value [ug/m3],

DV &

years Daily Design

Value site (name AQS ID) # Required

Continuous

Monitors # Active

Continuous

Monitors #

Additional

Continuous

needed

30180 Los Angeles

Orange 13, 131,431

2013 19.58

2012

- 2014 Los Angeles

060371103 41.7

,

201 2

- 201 4 Los Angeles

060371103 2 4

- FEM

3

- Non FEM 0

40140 San

Bernardino

Riverside 4,3 80,878

2013 19.37

,

2012

- 2014 Mira Loma

060658005 52.6

,

201 2

- 201 4 Rubidoux

060658001 2 3

- FEM

6

- Non FEM 2 0

1 DV Years

– The three years over which the design value was calculated

. Monitors required for SIP or Maintenance Plan: 1 5

2 One Non FEM is collocated at the Rubidoux site with a FEM.

* Currently all active continuous monitors do not meet acceptance criteria under 78 FR 3086 and is requested to not be compared
to the NAAQS.



### Table 1 7 c Minimum Monitoring Requirements 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

30180 Los Angeles

Orange 13, 131,431

2013 1 2 0

40140 San

Bernardino

Riverside 4,3 80,878

2013 1 2 0

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

Monitors required for SIP or Maintenance Plan: 4

### Air Quality Monitoring Network Plan

– July, 2015

39 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 Counties Population and

Census Year 201 4 Max

Concentration [ug/m3] Max

Concentration site (name AQS ID) # Required

Monitors # Active

Monitors # Additional

Monitors

Needed

30180 Los Angeles

Orange 13, 131,431

2013 98 Azusa

060370002 2

- 4

Low Conc 8 0

40140 San

Bernardino

Riverside 4,3 80,878

2013 136 1 San Bernardino

060 719004 4

- 8

Med Conc 1 1 0

Monitors required for SIP or Maintenance Plan: 19

1 Excluding high concentration at Indio ( 298 ug/m3, on 8/ 18 /201 4. )



### Table 1 9 Minimum Monitoring Requirements for NO2

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

. )

CBSA Population and

Census Year Max

AADT

Counts ( 201 3 ) 1 #

Required

Near Road

Monitors 2 #Active

Near Road

Monitors #Additional

Near Road

Monitors

Needed #Required

Area Wide

Monitors #Active

Area

Wide

Monitors #Additional

Area wide

Monitors

Needed

30180 13, 131,431

2013 3 77 ,000

201 3 2 2 0 1 15 0

40140 4,3 80,878

2013 2 67

, 0 00

201 3 2 2 0 1 8 0

1 Max AADT Counts

– 201 3 is the latest data available from CA DOT

2 Four r equired beginning January 1, 201 5

. Monitors required for SIP or Maintenance Plan: 13 (area wide), 4 (near road) 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, 2015

40 Table 20 Minimum Monitoring Requirements for S O2

(Note : Refer to section 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

30180 Los Angeles

Orange 61 02

. 45

2013 80, 134 0 1 4 0

40140 San

Bernardino

Riverside 2307.02

2013 10, 107 0 1 2 0

1 Using latest NEI data 2013 , available on EPA website : http://www.epa.gov/ttn/chief/net/ 20 13 inventory .html

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

. Monitors required for SIP or Maintenance Plan: 6 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

30180 13, 131,431

2013 1 1 0 1 6

40140 4,3 80,878

2013 1 1 0 7

1 Required beginning January 1, 201 5

2 Required sites to be active by January 1, 2015 ; to be collocated with near road NO2 sites. Monitors required for SIP or Maintenance Plan: 23 (area wide), 2 (near road) EPA Regional Administrator

- 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

Monitors # Active Monitors # Additional

Monitors Needed

Los Angeles (Main Street)

060371103 30180 13, 131,431

2013 1 1 0

Rubidoux

060658001 40140 4,3 80,878

2013 1 1 0

### Air Quality Monitoring Network Plan

– July, 2015

41 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/2011inventory.html (5/1/201 5 )

Monitors Required for SIP or Maintenance 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 , Non NCore Monitoring

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

. )

1 DV Years

– The three years over which the design value was calculated

. CBSA Population and

Census Year Annual Design

Value [ug/m3],

DV & Years 1 # Required Area

Wide Monitors # Active Area

Wide Monitors # Additional

Monitors Needed

30180 13, 131

, 431

201 3 0.01,

2012

- 2014 0 4 0

40140 4,380,878

201 3 0.01,

2012

- 2014 0 2 0

### Air Quality Monitoring Network Plan

– July, 2015

42 Table 2 3 Minimum Monitoring Requirements for PAMS

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

. )



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

- NCore Pb Networks

(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) 780, 120 19 3 3

PM10 (SSI Hi

- Vol) 063 , 102 19 3 3

Pb (TSP Hi

- Vol) 110 (Non Source) 8 1 2

Pb (Tsp Hi

- Vol) 110 (Source) 5 1 1

Method Cod e # Primary

Monitors # Required

Collocated Monitors # Active Collocated

Monitors 1

None 0 0 6

### Air Quality Monitoring Network Plan

– May 2015



## Data S ubmittal and A rchiving R equirements

As required in 40 CFR 58.16(a), data is reported via AQS including all ambient air quality data and associated quality assurance data for SO2

, CO

, O3

, NO2

, Near Road 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 co ncentration, meteorological data 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, 201 4

.

A data certification letter has been submitted to the EPA Regional Administrator certifying applicable 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, 201 4

.