# AIR POLLUTION CONTROL DISTRICT



# A mbient Air Monitoring

Annual Network Plan

July 20 13

Prepared by

APC PLANNING DIVISION

Monitoring Section

Jonathan Barroga

Reviewed by

APC Division Manager

Monica N. Soucier150 S 9 TH Street

El Centro, CA 92243 P 760.482.4606

F 760.353

- 9904



## Table of Contents

Page

I Introduction

................................ ................................ ........................ 6

II Air Monitoring Network Design Overview

................................ .......... 8

A Monitoring Objectives

................................ ............................. 10

B Spatial Scales

................................ ................................ ......... 9

C Purpose

................................ ................................ .................. 14

III Monitoring Requirements

................................ ................................ .. 18

A Ozone (O 3 

## )

................................ ................................ .............. 19

B Carbon Monox ide (CO)

................................ ........................... 20

C Nitrogen Dioxide (NO 2 

## )

................................ ........................... 20

D Sulfur Dioxide (SO 2 

## )

................................ ................................ 21

E Particulate Matter (PM 10 

## )

................................ ........................ 21

F Particulate Matter (PM 2.5 

## )

................................ ........................ 22

Spatial Averaging Approaches for PM 2.5



## ................................ . 23

IV Sampling Frequency Review

................................ ............................. 23

V Proposed Modifications to the Network Design

................................ . 25

Calexico East

................................ ................................ ..................... 25

Calexico Ethel

................................ ................................ .................... 25

Niland

................................ ................................ ................................ 26

Westmorland

................................ ................................ ..................... 26

VI Quality System Requirements

................................ ........................... 26

A Quality Management Plans (QMP) and

Quality A ssurance Project Plan (QAPP)

................................ . 26

B Data Review and Submittal

................................ ..................... 26

VII Overall Summary of the Imperial County Ambient

Air Monitoring Net work

................................ ................................ ...... 27

VIII Detailed Site Information

................................ ................................ ... 29

Niland Station

................................ ................................ .................... 29

Westmorland Station

................................ ................................ ......... 33

Brawley Station

................................ ................................ .................. 37

El Centro Station

................................ ................................ ............... 41

Calexico Ethel Station

................................ ................................ ....... 45

Appendix A Regulatory Language of 40 CFR §58.10

................................ .. 50

Glossary of Acronyms

................................ ................................ .................. 52

Imperial County Air Pollution Control District Page 2 of 53

Annual Air Monitoring Network Plan 2013150 S 9 TH Street

El Centro, CA 92243 P 760.482.4606

F 760.353

- 9904



## List of Figures

Page

Figure 1 Map of Ambient Air Monitoring Stations in

Imperial County

................................ ................................ ....... 7

Figure 2. Map of Niland Monitoring Stations

................................ .......... 30

Figure 3. Map of Westmorland Monitoring Station

................................ . 34

Figure 4. Map of Brawley Monitoring Station

................................ ......... 38

Figure 5. Map of El Centro Monitoring Station

................................ ....... 42

Figure 6. Map of Calexico Ethel Monitoring Station

............................... 46

Imperial County Air Pollution Control District Page 3 of 53

Annual Air Monitoring Network Plan 2013

## List of Tables

Page

Table 1 Site Classifications Ozone and NO 2



## ................................ ........ 9

Table 2 Site Classifications CO and SO 2



## ................................ ............. 9

Table 3 Site Classifications PM 10 

## and PM 2.5



## ................................ ........ 10

Table 4 Site Type Relationship to

Scales of Representativeness

................................ ................ 1 1

Table 5 Spatial Scales for Ozone and NO 2



## ................................ .......... 11

Table 6 Spatial Scales for CO and SO 2



## ................................ ............... 12

Table 7 Spatial Scales for PM 10 

## and PM 2.5



## ................................ ........... 13

Table 8 Network Monitoring Purpose

(Gaseous Criteria Pollutants) All

................................ ............. 16

Table 9 Network Monitoring Purpose

(Particulate Pollutants

- PM 10 

## ) Brawley & Niland

...................... 17

Table 10 Network Monitoring Purpose

(Particulate Pollutants

- PM 10 

## ) El Centro, Calexico and

Westmorland

................................ ................................ ........... 17

Table 11 Network Monitoring Purpose

(Particulate Pollutants

– PM 2.5 

## ) Brawley & El Centro

............... 17

Table 12 Network Monitoring Purpose

(Particulate Pollutants

– PM 2.5 

## ) Calexico

................................ 18

Table 13 SLAMS Minimum O 3 

## Monitoring Requirements

...................... 19

Table 14 Summary of Minimum Monitoring Requirements Ozone

......... 20

Table 15 Summary of Minimum Monitoring Requirements CO

.............. 20

Table 16 Summary of Minimum Monitoring Requirements NO 2



## ............ 21

Table 17 Summary of Min imum Monitoring Requirements SO 2



## ............. 21

Table 18 PM 10 

## Minimum Required Monitors per Concentration Level

... 22

Imperial County Air Pollution Control District Page 4 of 53

Annual Air Monitoring Network Plan 2013

## Table 19 Annual Max and Mean PM 10



## ................................ ................... 22

Table 20 Summary for Minimum Monitoring Requirements PM 10



## .......... 22

Table 21 PM 2.5 

## Min imum Monitoring Requirements

............................... 23

Table 22 Summary for Minimum Monitoring Requirements PM 2.5



## ......... 23

Table 23 PM 10 

## Sampling Frequency Calculations

................................ . 24

Table 24 PM2.5 Sampling Frequency Calculations

............................... 25

Table 25 Ambient Air Quality Monitoring Site Locations

Imperial County

................................ ................................ ....... 27

Table 26 Pollutants and Parameter Monitored Per Site

......................... 28

Table 27 Summary of Site type, Spatial Sca le and Purpose

................. 28

Imperial County Air Pollution Control District Page 5 of 53

Annual Air Monitoring Network Plan 2013

# I INTRODUCTION

According to Title 40 of the Code of Federal Regulations (CFR) Part 58.10 (40 CFR

58.10) , states and where applicable local agencies are required to adopt and submit to

the Regional Administrator of the United States Environmental Protection Agency (US

EPA) an annual air monitoring network plan ( Network Plan) which establishes and

maintains an air quality surveillance system. By regulation an air quality surveillance

system is composed of monitoring stations equipped with either, or a combinat ion of

Federal Reference Method (FRM), Federal Equivalent Method (FEM) or Approved

Regional Method (ARM) monitors. These monitors measure ambient levels of gaseous

and particulate (solid and liquid aerosol) air pollutants.

Depending on the purpose and air quality designation of an area the monitoring s tation

may be one of many different types of stations. Here in Imperial County all monitoring

stations are designated as state or local air monitoring stations (SLAMS). Per CFR all

SLAMS networks are amb ient air quality monitoring sites that are primarily needed for

National Ambient Air Quality Standards (NAAQS) comparisons. The NAAQS is

established by US EPA to protect the public health and the environment. There are two

types of NAAQS that an Air Dist rict must consider; the primary standard which provides

for the protection of the public health and the secondary standard which provides for

protection of the public welfare which includes protection against decreased visibility

and damage to animals, cro ps, vegetation and buildings.

SLAMS exclude special purpose monitor (SPM ) stations but include n ational c ore multipollutant monitoring stations (NCore), photochemical assessment monitoring

stations (PAMS) and all other State or locally operated stations t hat have not been

designated as SPM stations. 1 

## Two Beta Attenuation Mass Monitors (BAM’s) for

Particulate Matter of less than 10 microns (PM 10 

## ) have been designated at SPM’s. One

BAM is located in Brawley while the other is located in Niland. Currently, no NCore or

PAMS are located in Imperial County.

In addition

, 40 CFR P art 58 requires the iden tification of one and only one P rimary

Q uality Assurance O rganization (PQAO) for each criteria pollutant sampler/monitor

within a monitoring station. Currently

, the identified PQAO for Imperial County for

Ozone (O 3 

## ), Carbon Monoxide (CO), Oxides of Nitrogen and PM 10 

## is the California Air

Resources Board (CARB)

. The PQAO for Particulate Matter of less than 2.5 microns

(PM 2.5 

## ) is the San Diego Air Pollution Control District (SDAPCD). While the Imperial

County Air Pollution Control District (Air District) handles all the day to day operations

for each criteria pollutant sampler/monitor the PQAO is the monitoring organizatio n that

is responsible for pooled data quality assessments.

The Network Plan, as mentioned above, is required by federal regulation. It requires

the Air District to identify the purpose of each monitor with in the SLAMS network and it

requires evidence tha t the siting and operation of each monitor meets the requirements

1 

### Code of Federal Regulations, Title 40 Part 58.1 Definitions of SLAMS

Imperial County Air Pollution Control District Page 6 of 53

Annual Air Monitoring Network Plan 2013

## of appendices A, C, D and E of 40 CFR Part 58. For clarity, “monitor” means an

instrument, sampler, analyzer, or other device that measures or assists in the

measurement of atmospheric air pollutants and which is acceptable for use in ambient

air surveillance under the applicable provisions of appendix C of 40 CFR Part 58. 2



## Overall, this Network Plan provides the results of a five year assessment broken down

to reflect the annual outcome.

Figure 1 below depicts the current location of each monitoring station in Imperial

County.

Figure 1

Ambient Air Monitoring Stations

Imperial County

* Calexico

- East was closed in 20 10

*Westmorland station experienced an electrical fire in 2012

2 

### Code of Federal Regulations, Title 40 Part 58, Appendix C

Imperial County Air Pollution Control District Page 7 of 53

Annual Air Monitoring Network Plan 2013

# II AIR MONITORING NETWORK DESIGN OVERVIEW

A Monitoring Objectives

The SLAMS network for Imperial County includes a total of five monitoring stations

located within the urban areas of Westmorland, Brawley, El Centro and Calexico and

one station located in the rural area of Niland . The Air District operates four of the

monitoring stations while the CARB operates the monitoring station in Calexico. All data

and information concerning the Calexico monitoring station was obtained fr om CARB

and is accurate to the best of our knowledge.

Specific criteria pollutants and meteorological parameters are monitored at each air

monitoring station in Imperial County . For a list of the different measured pollutants and

parameters see page 28 T able 26 and s ection VI I I Detailed site information

. All data

stemming from the network must abide by all applicable quality assurance requirements

(40 CFR Part 58 Appendix A), ambient air quality monitoring methodology (40 CFR Part

58 Appendix C), network design criteria (40 CFR Part 58 Appendix D) and must meet all

applicable monitoring probe and path siting criteria (40 CFR Part 58 Appendix E). This

allows for the proper management of a quality system that assures monitoring

information is produced in a systematic and organized way.

The intent of any air monitoring network should be to meet well defined needs, uses and

purpose. In order to accomplish this, Appendix D of 40 CFR Part 58 requires all

monitoring networks to be designed in such a way as to meet three basic monitoring

objectives

.

1. Provide air pollution data to the general public in a timely manner.

2. Support compliance with ambient air quality standards and emission strategy

development.

3. Support for air pollution research studies.

All established air monitoring stations in Imperial County provide the three basic

monitoring objectives mentioned above. Combined these three basic monitoring

objectives directly relate to public exposure (PE)

. PE requires that decisi on making

bodies be well informed about peak air pollution levels, typical levels in populated areas,

the impact of transport either basin wide or internationally, and any source specific air

pollution levels. The Air District analyzed all the monitoring sites to identify if the site

classifies as either a highest concentration site, typical concentration site, a general

background concentration site, a regional transport site (includes international

transport), a site to determine the impact of significant sources or source categories or a

site which measures impacts to visibility, vegetation damage, or other welfare based

impact.

The following tables identif y the site classifications for each monitor in Imperial County.

Imperial County Air Pollution Control District Page 8 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 1

OZONE (44201) 8 HR MAX NO2 (42602) ANN 98%

YEAR SITE

LOCATION SITE TYPE PPM SITE TYPE PPB

2010 Calexico

Ethel Regional/Typical

Concentrations (R/TC) 0.082 Highest

Concentration 56.0 (HC)

El Centro Highest Concentration (HC) 0.082 Typical

Concentration 41.9 (TC)

Niland General Background (GB) 0.075 No NO 2 Monitoring N/A N/A

Westmorland Regional/Background (R/B) 0.077 No NO 2 Monitoring N/A N/A

2011 Calexico

Ethel Regional/Typical

Concentrations (R/TC) 0.076 Highest

Concentration 63.0 (HC)

El Centro Highest Concentration (HC) 0.084 Typical

Concentration 51.9 (TC)

Niland General Background (GB) 0.074 No NO 2 Monitoring N/A N/A

Westmorland Regional/Background (R/B) 0.081 No NO 2 Monitori ng N/A N/A

2012 Calexico

Ethel Regional/Typical

Concentrations (R/TC) 0.095 Highest

Concentration 66.0 (HC)

El Centro Highest Concentration (HC) 0.091 Typical

Concentration 49.8 (TC)

Niland General Background (GB) 0.076 No NO 2 Monitoring N/A N/A

Westmorland Regional/Background (R/B) 0.074 No NO 2 Monitoring N/A N/A



### TABLE 2

CO (42101) 1 HR

MAX 8 HR

MAX S O 2 (42401) 98% 3 HR

YEAR SITE

LOCATION SITE TYPE PPM PPM SITE TYPE PPB PPM

2010 Calexico

Ethel Typical

Concentration (TC) 6.1 4.5 Typical Concentration 7 0.024 (TC)

El Centro Highest

Concentration (HC) 19.6 5.6 No SO 2 Monitoring N/A N/A N/A

2011 Calexico

Ethel Typical

Concentration (TC) 7.7 6.1 Typical Concentration 8 0.025 (TC)

El Centro Highest

Concentration (HC) 36.0 9.0 No SO 2 Monitoring N/A N/A N/A

2012 Calexico

Ethel Typical

Concentration (TC) 6.7 4.9 Typical Concentration 7 0.330 (TC)

El Centro Highest

Concentration (HC) 25.1 7.4 No SO 2 Monitoring N/A N/A N/A



### Imperial County Air Pollution Control District Page 9 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 3

PM10 (81102) 24 HR PM2.5 (88101) 24 HR ANN

YEAR SITE

LOCATION SITE TYPE μ/m 3 SITE TYPE μ/m 3 μ/m 3

2 010 Calexico

Ethel Highest Concentrations (HC) 112 Highest Concentration 50.9 12.8 (HC)

El Centro Typical Concentrations (TC) 69 Typical Concentration 19.9 6.6 (TC)

Brawley Typical Concentrations (TC) 61 Background/Transport 16.2 6.2 (B/T)

Niland General Background (GB) 58 No PM 2.5 Monitoring N/A N/A N/A

Westmorland Regional/Background (R/B) 86 No PM 2.5 Monitoring N/A N/A N/A

2011 Calexico

Ethel Highest Concentrations (HC) 80 Highest Concentration 80.3 13.5 (HC)

El Centro Highest Concentration (HC) 81 Typical Concentration 54.4 7.5 (TC)

Brawley Typical Concentrations (TC) 85 Background/Transport 37.0 7.1 (B/T)

Niland General Background (GB) 220 No PM 2.5 Monitoring N/A N/A N/A

Westmorland Regional/Background (R/B) 74 No PM 2.5 Monitoring N/A N/A N/A

2012 Calexico

Ethel Highest Concentrations (HC) 406 Highest Concentration 64.7 14.4 (HC)

El Centro Highest Concentration (HC) 75 Typical Concentration 26.4 7.5 (TC)

Brawley Typical Concentrations (TC) 127 Background/Transport 25.9 8.1 (B/T)

Niland General Background (GB) 212 No PM 2.5 Monitoring N/A N/A N/A

Westmorland Regional/Background (R/B) 109 No PM 2.5 Monitoring N/A N/A N/A



## B Spatial Scales

As mentioned above , PE is the basic monitoring objective for all air monitoring stations

in Imperial County. In order to determine whether a monitor has been properly sited

monitors must be represented by its spatial scale. T he relationship between the

monitoring objective, site type and the geographic location is understood or interpreted

by the spatial scale of representativeness

. In some cases, the physical location of a

monitor is determined by considering the affect of iden tified emission patterns and not

the spatial scale of representativeness. In these situations the spatial scale of

representativeness is a result of the site location.

The spatial scale is described in the CFR as “...the physical dimensions of the air parc el

nearest to a monitoring site throughout which actual pollutant concentrations are

reasonably similar.” 3 

## Listed below are the general spatial scales identified as the most

appropriate for the monitoring site types. Depending on the monitored pollutant the

description may change slightly because of the behavior of the pollutant. Nonetheless,

generally the spatial scales are as follows:

Microscale (MCS)

– Defines the concentrations in air volumes associated with area

dimensions ranging from several mete rs up to about 100 meters.

Middle Scale (MS)

– Defines the concentration typical of areas up to several city blocks

in size with dimensions ranging from about 100 meters to 0.5 kilometer.

3 

### Code of Federal Regulation Appendix D to Part 58

– Network Design Criteria for Ambient Air Quality Monitoring,

section 1.2 Spatial Scales, subsection (b).

Imperial County Air Pollution Control District Page 10 of 53

Annual Air Monitoring Network Plan 2013

### Neighborhood Scale (NS)

– Defines concentrations within some extended area of the city

that has relatively uniform land use with dimensions in the 0.5 to 4.0 kilometer range.

The neighborhood and urban scales have the potential to overlap in applications that

concern secondaril y formed or homogeneously distributed air pollutants.

Urban Scale (US)

– Defines concentrations within an area of city

- like dimensions, on the

order of 4 to 50 kilometers. Within a city, the geographic placement of sources may

result in there being no si ngle site that can be said to represent air quality on an urban

scale.

Regional Scale (RS)

– Defines usually a rural area of reasonably homogeneous

geography without large sources, and extends from tens to hundreds of kilometers.

National and Global S cales (NGS)

– These measurement scales represent

concentrations characterizing the nation and the globe as a whole. (There are no

National or global scales monitoring stations in Imperial County.)

TABLE 4

SITE TYPE RELATIONSHIP TO SCALES OF REPRESENTATI VENESS

SITE TYPE APPROPRIATE SITING SCALES

1 Highest Concentration Micro, middle, neighborhood and sometimes

urban or regional for secondarily formed

pollutants

2 Population O riented Neighborhood

, urban

3 Source Impact Micro, middle, neighborhood

4 General/Background & regional

transport Urban

, regional

5 Welfare

- related Impacts Urban

, regional



## The following tables demonstrate the spatial scales for each monitor in Imperial County.

TABLE 5

OZONE (44201) 8 HR MAX NO 2 (42602) ANN

98%

YEAR SITE

LOCATION SITE TYPE SCALE PPM SITE TYPE SCALE PPB

2010 Calexico

Ethel R/TC Urban 0.082 HC Urban 56.0

El Centro HC Neighborhood 0.082 TC Neighborhood 41.9

Niland GB Regional 0.075 No NO 2 Monitoring N/A N/A

Westmorland R/B Regional 0.077 No NO 2 Monitoring N/A N/A

2011 Calexico

Ethel R/TC Urban 0.076 HC Urban 63.0

El Centro HC Neighborhood 0.084 TC Neighborhood 51.9

Niland GB Regional 0.074 No NO 2 Monitoring N/A N/A

Westmorland R/B Regional 0.081 No NO 2 Monitoring N/A N/A

2012 Calexico

Ethel R/TC Urban 0.095 HC Urban 66.0

El Centro HC Neighborhood 0.091 TC Neighborhood 49.8

Niland GB Regional 0.076 No NO 2 Monitoring N/A N/A

Westmorland R/B Regional 0.074 No NO 2 Monitoring N/A N/A



### Imperial County Air Pollution Control District Page 11 of 53

Annual Air Monitoring Network Plan 2013

## The scale of representativeness for O 3 

## monitoring would not occur under small but

rather lar ge volumes of air. Therefore, n eighborhood, urban and regional spatial scales

would be appropriate for O 3 

## . Data trends seem to indicate th at the Calexico monitor

meets the u rban spatial scale while the El Centro monitor meet s the neighborhood

spati al scale. Both the Niland and Westmorland monitor s meet the r egional spatial

scale. Although d ata indicates that both the Calexico and El Centro monitors measur e

bot h regional and urban mixing the Calexico monitor measures downwind transport

concentrations from an international source

. While the Niland and Westmorland

monitors typically measure transported O 3 

## from other air basins in California

.

T he El Centro monitor most closely meets the neighborhood spatial scale as the site is

located away from immediate Nitrogen Dioxide ( NO 2 

## ) sources. The Calexico monitor

however provide s transport impact information for trend analysis. This is because the

monitor is approximately 2.5 miles away from a major international port of entry, where

high volumes of mobile source emissions are present. However, unlike a major

roadway the majority of the mobile sources are idling for significant periods of time and

little to no heavy duty vehicles are present. The Calexico monitor most closely meets

the u rban spatial scale.

TABLE 6

CO (42101) 1 HR MAX 8 HR MAX SO 2 (42401) 98% 3 HR

YEAR SITE

LOCATION SITE TYPE SCALE PPM PPM SITE TYPE SCALE PPB PPM

2010 Calexico

Ethel TC Middle 6.1 4.5 TC Urban 7 0.024

El Centro HC Neighborhood 19.6 5.6 No SO 2 Monitoring N/A N/A N/A

2011 Calexico

Ethel TC Middle 7.7 6.1 TC Urban 8 0.025

El Centro HC Neighborhood 36.0 9.0 No SO 2 Monitoring N/A N/A N/A

2012 Calexico

Ethel TC Middle 6.7 4.9 TC Urban 7 0.330

El Centro HC Neighb orhood 25.1 7.4 No SO 2 Monitoring N/A N/A N/A



## Because CO is primarily occurring in areas near major roadways and intersections with

high traffic density the El Centro and Calexico monitors meet the neighborhood and

middle spatial scales, respectively. It may be argued that the Calexico Ethel monitor

m ay also fit the n eighborhood scale because of the proximity of international roadway

emissions. This assessment is still under review and requires further evaluation.

The most appropriate spatial scale for the Sulfur Dioxide ( SO 2 

## ) monitor in Calexico is

the u rban spatial scale. The Calexico monitor is located away from stationar y point and

area sources of SO 2 

## however, this site is uni que in that it is located just n orth of a major

international metropolitan and as such is ideal for identifying trends and background

concentrations.

Imperial County Air Pollution Control District Page 12 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 7

PM 10 (81102) 24 HR PM 2.5 (88101) 24 HR ANN

YEAR SITE

LOCATION SITE TYPE SCALE μ/m 3 SITE TYPE SCALE μ/m 3 μ/m 3

2010 Calexico

Ethel HC Neighborhood 112 HC Neighborhood 50.9 12.8

El Centro TC Neighborhood 69 TC Neighborhood 19.9 6.6

Brawley TC Neighborhood 61 B/T Neighborhood 16.2 6.2

Niland GB Middle 58 No PM 2.5 Monitoring N/A N/A N/A

Westmorland R/B Middle 86 No PM 2.5 Monitoring N/A N/A N/A

2011 Calexico

Ethel HC Neighborhood 80 HC Neighborhood 80.3 13.5

El Centro TC Neighborhood 81 TC Neighborhood 54.4 7.5

Brawley TC Neighborhood 85 B/T Neighborhood 37.0 7.1

Niland GB Middle 220 No PM 2.5 Monitoring N/A N/A N/A

Westmorland R/B Middle 74 No PM 2.5 Monitoring N/A N/A N/A

2012 Calexico

Ethel HC Neighborhood 406 HC Neighborhood 64.7 14.4

El Centro TC Neighborhood 75 TC Neighborhood 26.4 7.5

Brawley TC Neighborhood 127 B/T Neighborhood 25.9 8.1

Niland GB Middle 212 No PM 2.5 Monitoring N/A N/A N/A

Westmorland R/B Middle 109 No PM 2.5 Monitoring N/A N/A N/A



## In Imperial County size selective inlet high volume samplers are operated at 5 sites

Brawley, Calexico, El Centro, Niland and Westmorland . Three of the monitors for PM 10 

## sampling in Imperial County can be categorized as neighborhood scale, while two can

be categorized as middle scale. Both the particulate matter concentrations and the land

use and land surface characteristics can be said to be homogeneous among all the

m onitoring stations albeit in their own unique way. The Brawley, Calexico and El Centro

monitors can be said to represent conditions where people commonly live and work for

extended periods and provide comparisons between cities. The Niland and

Westmorlan d monitors help provide short

- term exposure to public health effects as

these monitors tend to provide PM 10 

## emissions on outlaying rural areas.

In addition to the high volume samplers two designated SPM PM 10 

## BAM units are

operated in N iland and Brawley. These BAM units are utilized primarily for research and

public advisory purposes.

US EPA approved FRM PM 2.5 

## monitors operate within the cities of B rawley, Calexico

and EI Centro . The Brawley and El Centro PM 2.5 

## monitors (which are not collocated)

represe nt a reasonably homogeneous urban sub

- region with similar land use and land

surface characteristics. These sites provide information about trends and compliance

with the NAAQS. The Calexico site includes collocated FRM PM 2.5 

## monitors and

collocated SPM non FEM continuous PM 2.5 

## analyzers combined these monitors are

intended to capture those characteristic concentrations associa ted with heavy mobile

emissions and their exposure to the general public. Because of the close proximity of

the international por t of entry the Calexico PM 2.5 

## monitors combined are appropriate for

the evaluation of possible short

- term PE, population exposure, trends and compliance

Imperial County Air Pollution Control District Page 13 of 53

Annual Air Monitoring Network Plan 2013

## with the NAAQS. Finally, the Calexico monitors consistently record the highest

concentrations for PM 2. 5 

## within the Imperial County air monitoring network. Therefore,

the most appropriate spatial scale for Brawley, Calexico and El Centro is the

neighborhood scale.

C Purpose

As mentioned above, the intent of any air monitoring network should be to meet well

defined needs, uses and purpose. A properly established monitoring station should

target the key data collection need identified by the monitoring objective and spatial

scale of the site. Nationally, there are several different types of monitoring stati ons

varying in technical sophistication. Locally, all the monitoring stations in Imperial

County measure the levels of concentrations affecting the general public or public

exposure. As such all the air monitoring stations meet the three basic monitoring

objectives that relate to public exposure

. Below is the list of the basic monitoring

objectives and an explanation of how the data is utilized to meet those objectives.

1. Provide air pollution data to the general public in a timely manner.

a Utilizing the CARB sponsored Air Quality and Meteorological Information

System (AQMIS) http://www.arb.ca.gov/aqmis2/aqmis2.php . To do this, the

Air District provides hourly data via a transmission control protocol (TCP) over

the World Wide Web. Data transmitted in this format is “real time” data

subject to change upon undergoing verification protocol.

b Utilizing the Air Quality Index (AQI) format, the Air District provides AQI

notifica tions and information to the general public via the

www.imperialvalleyair.org webpage. This site allows the public or any

interested party to subscribe to instant messaging via e

- mail or text for

notifications concerning levels of PM 10 

## and/or seasonal forecast for Ozone.

The Imperial Valley Air webpage also supports an independen t school

program in Calexico, Heber, El Centro and Brawley designed to help

minimize impacts to students during unusually high particulate days.

c Finally, the Air District posts daily meteorolo gical conditions and advisories,

such as wind advisories, on th e Imperial County Air Pollution Control District

webpage for use by the general public. Such information is designed as a

guide for members of the public, industry and governments when making

decisions on the type of activity they intend to commit to duri ng any one given

day.

2. Provide compliance and emission strategy development and support.

Currently, all SLAMS data is utilized in the development of attainment and

maintenance plans. The Air District, along with the CARB, continually review

existing data for trends, peaks and seasonal variations that allow for proper regional

Imperial County Air Pollution Control District Page 14 of 53

Annual Air Monitoring Network Plan 2013

## air quality modeling. Regional air Quality modeling is used to develop emissions

strategies and to identify the impact of control measures, either as improving air

quality or as an identification of where improvement is needed.

On August 11, 2009 the Imperial County Board of Directors adopted the 2009 PM 10 

## S tate I mplementation P lan (SIP) and on July 13, 2010 the same board adopted the

2009 8

- Hour Ozone Air Quality Management Plan. The newest SIP develop ment is

that of the PM 2.5 

## SIP.

3. Provide support for air pollution research studies.

The CARB is the lead agency for working on research studies related to health effect

assessments, atmospheric processes and for monitoring methods development.

CARB issues its “State and Local Air Monitoring Network Plan” which covers the

monitoring networks thro ughout the state. In addition, the CARB maintains a

comprehensive webpage, with information concerning the “Air Quality Monitoring

Network” activities, studies, and research conducted for the entire state.

http://www.arb.ca.gov/aqd/aqmoninca.htm

The pollutants of primary interest here in Imperial County are listed in detail under

section VI Overall Summary of the Imperial County Ambient Air Monitoring Network

. The following tables describe the monitoring purpose per monitor in Imperial County.

Imperial County Air Pollution Control District Page 15 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 8

NETWORK MONITORING PURPOSE (GASEOUS CRITERIA POLLUTANTS)

Name El Centro Brawley Westmorland Niland Calexico

Address 15O S. 9th St. 220 Main St. 570 Cook St. 7711 English Rd. 1020 Belcher St.

Lat/Long. N 32.79215

W

- 115.56299 N 32.97831

W

- 115.53904 N 33.03239

W

- 115.62362 N 33.21383

W

- 115.54448 N 32.67618

W

- 115.48307

AQS ID 06 025 1003 06 025 0007 06 025 4003 06 025 4004 06 025 0005

ARB ID 13694 13701 13697 13997 13698

Operator ICAPCD ICAPCD ICAPCD ICAPCD CARB

O3 Monitor

Designation SLAMS SLAMS SLAMS SLAMS SLAMS

Sampling

Method API T 400 44201 API 400A 44201 API 400A 44201 API 400E 44201

Spatial Scale NEIGHBORHOOD REGIONAL REGIONAL URBAN

Monitor

Objective PUBLIC

EXPOSURE PUBLIC

EXPOSURE PUBLIC

EXPOSURE PUBLIC

EXPOSURE

CO Monitor

Designation SLAMS SLAMS SLAMS SLAMS SLAMS

Sampling

Method API T300 42101 DASIBI 3008

42101

Spatial Scale NEIGHBORHOOD MIDDLE

Monitor

Objective PUBLIC

EXPOSURE PUBLIC

EXPOSURE

NO2 Monitor

Designation SLAMS SLAMS SLAMS SLAMS SLAMS

Sampling

Method API 200A 42602 API 200E

Spatial Scale NEIGHBORHOOD URBAN

Monitor

Objective PUBLIC

EXPOSURE PUBLIC

EXPOSURE

SO2 Monitor

Designation SLAMS SLAMS SLAMS SLAMS SLAMS

Sampling

Method TECO 43

Spatial Scale URBAN

Monitor

Objective PUBLIC

EXPOSURE



### Imperial County Air Pollution Control District Page 16 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 9

NETWORK MONITORING PURPOSE

(PARTICULATE POLLUTANTS)

Name Brawley Niland

Address 220 Main St. 7711 English Rd.

Operator ICAPCD ICAPCD

PM10 Monitor

Designation SLAMS SPM SLAMS SPM

Sampling

Method GMW/SA 1200

81102 MET ONE

BAM1020 85101 GMW/SA

1200 81102 MET ONE

BAM1020

85101

Spatial

Scale NEIGHBORHOOD MIDDLE

Monitor

Objective PUBLIC

EXPOSURE SUPPORT PUBLIC

EXPOSURE SUPPORT

Sampling

Frequency 1

- 6 CONTINUOUS 1

- 6 CONTINUOUS



### TABLE 10

NETWORK MONITORING PURPOSE

(PARTICULATE POLLUTANTS)

Name El Centro Calexico Westmorland

Address 150 S. 9th St. 1020 Belcher St. 570 Cook St.

Operator ICAPCD CARB ICAPCD

PM10 Monitor

Designation SLAMS SLAMS SLAMS

Sampling

Method GMW/SA 1200

81102 GMW/SA 1200

81102 GMW/SA 1200 81102

Spatial

Scale NEIGHBORHOOD NEIGHBORHOOD NEIGHBORHOOD

Monitor

Objective PUBLIC

EXPOSURE PUBLIC

EXPOSURE PUBLIC EXPOSURE

Sampling

Frequency 1

- 6 1

- 6 1

- 6



### TABLE 11

NETWORK MONITORING PURPOSE

(PARTICULATE POLLUTANTS)

Name Brawley El Centro

Address 220 Main St. 15O S. 9th St.

Operator ICAPCD ICAPCD

PM2.5 Monitor

Designation SLAMS SLAMS

Sampling

Method R&P 2025 (WINS) 88101 R&P 2025 (WINS) 88101

Spatial Scale NEIGHBORHOOD NEIGHBORHOOD

Monitor

Objective PUBLIC EXPOSURE PUBLIC EXPOSURE

Sampling

Frequency 1

- 3 1

- 3



### Imperial County Air Pollution Control District Page 17 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 12

NETWORK MONITORING PURPOSE

(PARTICULATE POLLUTANTS)

Name Calexico

Address 1020 Belcher St.

Operator CARB

PM2.5 Monitor

Designation SLAMS SLAMS SPM SPM

Sampling

Method R&P 2025 (VSCC)

88101 POC1 R&P 2025 (VSCC)

88101 POC2 MET ONE

BAM 1020

88501 POC3 MET ONE

BAM 1020

88501 POC4

Spatial

Scale NEIGHBORHOOD NEIGHBORHOOD

Monitor

Objective PUBLIC

EXPOSURE PUBLIC

EXPOSURE SUPPORT SUPPORT

Sampling

Frequency 1

- 3 1

- 6 CONTINUOUS CONTINUOUS



# III MONITORING REQUIREMENTS

As mentioned in the introduction , t here are no NCore or PAMS located in Imperial

County. Because there are no NCore stations there is no coarse particulate matter

( PM 10

- 2.5 

## ) monitoring or lead (Pb) monitoring . In addition, the Imperial County Airport

was not one of the 15 airports selected by the US EPA for study, nor are there any

stationary sources in Imperial County meeting the 0.5 tons per year (tpy) threshold

established by US EPA. There is however

, lead monitoring used for State and local

purposes only at the Calexico Ethel site that is not required un der any federal

monitoring requirement.

Federal regulation requires a minimum number of monitors per pollutant and grants

discretionary authority to the Regional Administrator, under certain conditions, to require

additional monitors above and beyond that required by the minimum standards. To

determine the total minimum number of required monitor ’ s specific consideration is

given to the pollutant of interest, purpose and population. To address population the

CFR utilizes a statistical

- based definition of a metropolitan area provided by the Office

of Management and Budget and the Census Bureau. Pertinent to Imperial County is the

metropolitan statistical area (MSA) which has been defined as a Core Based Statistical

Area (CBSA) associated with at least one u rbanized area with a population of 50,000 or

more . Imperial County is part of the EI Centro MSA, referenced as 20940. It covers the

major cities in our county and has a population count of 174,528 (2010 U.S. Census

Bureau information).

Overall, I mperial County meets or exceeds US EPA ' s minimum requirements.

Depend ing on the monitoring objective, state and local agencies will operate more

monitors than are required by law. T ypically, additional monitors are used to fulfill state

and local purposes for monitoring that are in addition to federal purposes. California air

quality standards are more stringent than federal standards and require more ambient

Imperial County Air Pollution Control District Page 18 of 53

Annual Air Monitoring Network Plan 2013

## air monitoring to show compliance with the state standards. Monitors are also used t o

keep the public informed of the actual air quality conditions where they live and work.

For O 3 

## , PM 2.5 

## and PM 10 

## , the required minimum number of monitoring sites is based on

area size (in terms of population and geographic characteristics) and typical peak

concentrations, either below or near the NAAQS. For other pollutants

, no monitoring is

required unless an area exceeds or is close to e x ceeding a NAAQS.

A Ozone (O 3 

## )

Currently, under federal regulation there are two Ozone NAAQS to be met. Although

the US EPA determined, on December 3, 2009, that the Imperial County "moderate" 8

-

hour ozone non

- attainment area attained the 1997 8

- hour Ozone standard the Impe rial

County is classified by US EPA as a "moderate" non

- attainment area. For the new

2008 8

- hour ozone standard Imperial County has been classified as a “ marginal” non

attainment area.

In designing an O 3 

## monitoring network factors such as geographic size, population

density, complexity of terrain, meteorology and air pollution transport must be

consider ed

.

Up until N ovember of 2012, four (4) ozone monitors functioned in Imperial County.

Because of an electrical fire, the Westmorland ozone monitor was placed out of

commission. M onitoring for O 3 

## in Imperial County is year round with forecasting

capabilities during the “ozone season”. For the three year period 2010

- 2012 El Centro

recorded the highest concentration among all sites within the monitoring network. El

Centro’s 8 hour design value is 0.081ppm 4 

## . Although El Centro is considered the

highest concentration site all sites are used to keep the public informed of ai r quality

utilizing the Air Quality Index (AQI) reporting framework and air quality mapping.

4 In 2012 Calexico had the highest daily concentration, 0.095 vs. El Centro concentration of 0.091 however the design value of El

Centro remained the highest of the four stations. 

### TABLE 13

SLAMS MINIMUM O 3 

### MONITORING REQUIREMENTS

MSA MOST RECENT 3

- YEAR DESIGN

VALUE MOST RECENT 3

- YEAR DESIGN

VALUE

POPULATION CONCENTRATION ≥85% OF ANY

O 3 

### NAAQS CONCENTRATIONS <85% OF

ANY O 3 

### NAAQS

> 10 million 4 2

4

- 10 million 3 1

350,000

- <4 million 2 1

50,000

- <350,000 1 0

Imperial County Air Pollution Control District Page 19 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 14

Summary of Minimum Monitoring Requirements Ozone

MSA County Population

(year 2010) 8

- hr design

value (years) Min # of

monitors

required Number of

active

monitors Monitors

needed

20940

El Centro Imperial 174,528 0.08 1 ppm

2010 201 2 1 4 * 0

MSA

20940

El Centro Monitor

Site 8

- hr design

value(years)

2010 2012 ≥85% of

2008 O 3 

### NAAQS

( .0 75 pp m ) Min # of

monitors

required Number of

active

monitors Monitors

needed

Population

(year 2010)

174,528 El Centro

Calexico

Westmorland

Niland 0.081 ppm

0.075 ppm

0.071ppm

0.070 ppm YES

YES

NO

NO 1 4 * 0

*The Westmorland Station experienced an electrical fire November of 2012. Currently, the station does not monitor for Ozone.



## B Carbon Monoxide (CO)

Population density is the significant trigger for CO monitoring. High population densities

of 1 million and above trigger the requirement of a single CO monitor along with a near

road NO 2 

## monitor. Imperial County does not meet the population requirement under the

CFR for required CO monitoring. However, c ontinued operation of existing SLAMS CO

sites using FRM or FEM is required until discontinuation is approved by the US EPA

Regiona l Adm inistrator. There are two SLAMS CO monitors operating with in the

Imperial County monitoring network

. For 20 12 , the maximum 1

- hour CO concentration

for El Centro was 25.1 ppm , and for Calexico Ethel 6

. 7 ppm.

TABLE 15

Summary of Minimum Monitoring Requirements CO

MSA County Population

(year 2010) 8

- hr max

value (years) Min # of

monitors

required Number of

active

monitors Monitors

needed

20940

El Centro Imperial 174,528 7.5 ppm

201 0 20 12 0 2 0



## C Nitrogen Dioxide (NO 2 

## )

Regulation requires the establishment of one microscale near

- road NO 2 

## monitoring

station within CBSA’s with a population of 500,000 or more. Regulation further requires

that there be one NO 2 

## monitoring station within CBSA’s with a population of 1,000,00 0

or more. The Imperial County does not meet either requirement. Nevertheless,

c ontinued operation of existing SLAMS NO 2 

## sites is required until discontinuation is

approved by the US EPA Regional Administrator. There are two SLAMS NO 2 

## monitors

operating with in the Imperial County m onitoring network . T he highest concentration site

Imperial County Air Pollution Control District Page 20 of 53

Annual Air Monitoring Network Plan 2013

## is the Calexico Ethel site with an 8 hour design value of 62 ppb (2010 2012 data ) and

the 2012 98 th 

## percentile of 66 ppb . For 20 12 the maximum 1

- hr concentration of 91 ppb

was recorded at the Cal exico Ethel monitoring station.

TABLE 16

Summary of Minimum Monitoring Requirements NO 2



### MSA County Population

(year 2010) 8

- hr design

value (years) Min # of

monitors

required Number of

active

monitors Monitors

needed

20940

El Centro Imperial 174,528 6 2 ppb

20 10 201 2 0 2 0



## D Sulfur Dioxide (SO 2 

## )

R egulation requires States for each CBSA to calculate the Population Weighted

Emissions Index (PWEI) in millions persons

- tons per year of SO 2 

## . Thresholds for the

SO 2 

## monitoring requirements begin at a PWEI of 1,000,000 down to 5,000. At a PWEI

equal to or greater than 5,000 but less than 100,000 a minimum of one SO 2 

## monitor is

required. At a PWEI equal to or greater than 100,000 but less than 1,000,000 a

minimum of two SO 2 

## monitors are required. The only SO 2 

## monitor operating with in the

Imperial County is located in Calexico. For 201 2 , the maximum concentration for

Calexico Ethel for 1

- hr was 15 ppb the 99 th 

## percentile is 7 ppb ( 2010 2012 ). PEWI

calculated using 2008 emission inventory data for Sulfur Oxide ( SO X 

## ) result in a value of

0. 0 7 million persons

- tons/yr.

E Particulate Matter (PM 10 

## )

According to regulation the number of PM 10 

## stations must range between 2 and 10

stations in areas where MSA population s exceed 1,000,000. Low population urban

areas are not required to have more than two (2) PM 10 

## stations. Regulation further

assesses the m inimum monitoring requirement for PM 10 

## according to levels of

concentration. For those areas with a MSA population equal to or less than 250,000 but

gr eater than 100,000 the minimum required number of PM 10 

## monitors is summarized

below. TABLE 17

Summary of Minimum Monitoring Requirements SO 2



### MSA County Population

(year 2010) Min # of

monitors

required Number of

active

monitors Monitors

needed

20940

El Centro Imperial 174,528 1 1 0

Imperial County Air Pollution Control District Page 21 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 18

PM 10 

### MINIMUM REQUIRED MONITORS PER CONCENTRATION LEVEL

HIGH MEDIUM LOW

CONCENTRATION CONCENTRATION CONCENTRATION

1

- 2 0

- 1 0



## High concentration areas are those areas in which the ambient PM 10 

## concentrations

exceed the PM 10 

## NAAQ S by 20 percent or more (180 μ/m 3 

## ) . Medium concentration

areas are those areas where ambient PM 10 

## concentrations exceed 80% percent of the

PM 10 

## NAAQS (>127.5 μ/m 3 

## ) . Low concentration areas are those areas where ambient

PM 10 

## concentrations are less than 80% of the PM 10 

## NAAQS (<127. 5μ/m 3 

## ) . Because

each area has its own unique sources of pollutants and controls the number of stations

is ultimately determined jointly by US EPA and the Sta te.

Imperial County is classified by US EPA as a “serious” non

- attainment area for PM 10 

## . All

PM 10 

## monitors operate on a one in six day schedule. On annual average, Brawley and

Calexico record the highest concentrations with in the monitoring network

. Calexico ’s

annual measurement is 63.6 μ/m 3 

## while Brawley ’s annual measurement is 37.9 μ/m 3



## .

TABLE 19

2012 Calexico Brawley El Centro Westmorland Niland

Annual Max. 406 127 75 109 212 μ g/m 3

Annual Mean 63.6 37.9 32.9 35.9 37.8 μ g/m 3

TABLE 20

Summary for Minimum Monitoring Requirements PM 10



### MSA

20940

El Centro County

Imperial Population (year

2010)

174,528 Min # of

monitors

required Number of

active

monitors Monitors needed

SITE

Calexico

Niland

Brawley

Westmorland

El Centro Max

406

212

127

109

75 Avg.Mean

63.3

37.8

37.9

35.9

32.9 2 5 0



## F Particulate Matter (PM 2.5 

## )

Federal regulation requires that all State, and where applicable, local agencies operate

the minimum number of required PM 2.5 

## monitoring sites. The minimum required PM 2.5 

## monitoring sites is determined by MSA population and the most recent 3

- year design

value. See Table 9 for a summary below.

Imperial County Air Pollution Control District Page 22 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 21

PM 2.5 

### MINIMUM MONITORING REQUIREMENTS

MSA MOST RECENT 3

- YEAR DESIGN

VALUE MOST RECENT 3

- YEAR DESIGN

VALUE

POPULATION CONCENTRATION ≥85% OF ANY

PM 2.5 

### NAAQS CONCENTRATIONS <85% OF ANY

PM 2.5 

### NAAQS

> 1 million 3 2

500,000

- 1 million 2 1

50,000

- <500,000 1 0



## Regulation further requires all required monitoring sites to be sited to represent

community

- wide air quality. The community

- wide site must be located in a population

oriented area of expected maximum concentration. In addition, the regulation requires

State, or where appropriate, local agencies to operate continuous PM 2.5 

## analyzers equal

to at least one

- half (ro und up) the minimum required monitoring sites. On this point, the

regulation further explains that at least one required continuous analyzer in each MSA

must be collocated with one of the required FRM/FEM/ARM monitors unless the monitor

is itself a contin uous FEM or ARM monitor in which case no collocation requirement

applies. Finally, the regulation requires States to establish PM 2.5 

## background and

transport sites, as well as conduct PM 2.5 

## chemical speciation utilizing Speciation Trends

Network (STN).

TA BLE 22

Summary for Minimum Monitoring Requirements PM 2. 5



### MSA County Population

(year 2010) 8

- hr design value

(2010

- 201 2 ) Min # of

monitors

required Number of

active

monitors Monitors

needed

20940

El Centro Imperial 174,528 3 2 μ/m 3 

### 1 3 0



## SPATIAL AVERAGING APPROACHES FOR PM 2.5



## The PM 2.5 

## NAAQS as specified in 40 CFR part 50 allows State and local air monitoring

agencies to spatially average PM 2.5 

## air quality data for comparison to the annual PM 2.5 

## NAAQS. This approach is not however comparable wit h the daily PM 2.5 

## NAAQS and is

directly related to epidemiological studies. The Air District has not opted to use spatial

averaging nor has the State included spatial averaging in Calexico. Consultation with

CARB and US EPA will occur should circumstance s change such that the Air District

would consider spatial averaging as necessary in the future

.

COLLOCATION REQUIREMENTS

Appendix A of 40 CFR 58 includes requirements for collocation of samplers as part of

quality checks for the PM 2.5 

## continuous PM 2.5 

## , PM 10 

## and Pb monitoring networks. The

requirements are to be met by each PQAO. Currently, there are four PQAO’s in

California, San Francisco Bay Area AQMD, San Diego County APCD, South Coast

AQMD and CARB. The respective requirements for collocation PM 2. 5 

## is discussed by

Imperial County Air Pollution Control District Page 23 of 53

Annual Air Monitoring Network Plan 2013

## each PQAO in their respective Network Plans

. CARB’s 2013 Annual Monitoring

Network Report for Small Districts in California contains information regarding the

collocation requirements on pages 34 through 37.



# IV SAMPLING FREQUENCY REVIEW

The PM 10 

## five year assessment resulted in no changes to current sampling frequencies

for PM 10 

## in Imperial County.

TABLE 23

PM10 Sampling Frequency Calculations

CALEXICO 0005 BRAWLEY 0007

1/6 Schedule 2008 2009 2010 2011 2012 2008 2009 2010 2011 2012

Design conc. = Highest 110 275 112 80 406 137 196 61 85 127

Ratio to Standard

-- > 0.7 1.8 0.7 0.5 2.7 0.9 1.3 0.4 0.6 0.8

EL CENTRO 1003 WESTMORLAND 4003

2008 2009 2010 2011 2012 2008 2009 2010 2011 2012

88 243 69 81 75 136 161 86 74 109

Ratio to Standard

-- > 0.6 1.6 0.5 0.5 0.5 0.9 1.1 0.6 0.5 0.7

NILAND 4004

2008 2009 2010 2011 2012

121 202 58 220 212

Ratio to Standard

-- > 0.8 1.3 0.4 1.5 1.4

Methodology: Highest value of each month/each year.



## The results of the PM 2.5 

## five year assessment indicates that the Calexico Ethel station

triggered the requirement for everyday sampling during the 2006

- 2008, 2007

- 2009 and

2009

- 2011 design values (all based on the 24

- hr design values within ±5 % of the

NAAQS). Discussions with US EPA indicate that everyday sampling should have been

commenced as early as January 1, 2010 for a minimum of 3 years. US EPA’s position

is that regulatory actions that include data that has not been mee ting historical sampling

frequency requirements cannot move forward unless the required sampling frequency is

implemented. This is true even when the most current design value does not fall within

the ±5% of the NAAQS. Therefore, the Calexico Ethel site is required to go to everyday

sampling no later than October 1, 2013.

.



### Imperial County Air Pollution Control District Page 24 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 24

PM2.5 Sampling Frequency Calculation s

STATION YEAR 24 hour Annual 24 Hour

S td Annual

Std Within

- /+ 5% of

Std? Daily

sampling

Design

Value Design

Value 35 12 24

hour Annual Required?

Calexico 2012 32 14 8.57 16.67 NO NO NO

Brawley 2012 18 7 48.57 41.67 NO NO NO

El Centro 2012 20 7 42.86 41.67 NO NO NO

Calexico 2011 35 14 0.00 16.67 YES NO YES

Brawley 2011 19 7 45.71 41.67 NO NO NO

El Centro 2011 20 7 42.86 41.67 NO NO NO

Calexico 2010 32 13 8.57 8.33 NO NO NO

Brawley 2010 19 8 45.71 33.33 NO NO NO

El Centro 2010 16 8 54.29 33.33 NO NO NO

Calexico 2009 34 13 2.86 8.33 YES NO YES

Brawley 2009 21 8 40.00 33.33 NO NO NO

El Centro 2009 18 8 48.57 33.33 NO NO NO

Calexico 2008 36 12 2.86 0.00 YES YES YES

Brawley 2008 19 8 45.71 33.33 NO NO NO

El Centro 2008 21 8 40.00 33.33 NO NO NO

References: AQS AMP480 Design Value Report (05.20.2013)

40 CFR 58.12(d)( iii) Required SLAMS whose measurements determine the design value for their area and that are

within plus or minus 5 percent of the daily PM2.5 NAAQS must have an FRM or FEM operate on a daily schedule. A

continuously operating FER or ARM PM2.5 monitor sa tisfies this requirement.

Final Network Plan memo (Region IX; May 08, 2012); Attachment E: % formula used

– 24 hour standard ABS((35

- x)/(35)*100) Annual Standard ABS ((12

- y)/(12)*100)



# V PROPOSED MODIFICATIONS TO THE NETWORK DESIGN

Calexico East

C ARB has discontinued monitoring activities at the Calexico East site sin ce July 2010

. US EPA formally approved the closure of Calexico East site April 2013

.

Calexico Ethel

Both the Air District and CARB are currently evaluating the relocation of the Calexico

Ethel site. The current site has been overrun by development and tree growth

. The

proposed relocation is within a 1 mile perimeter from the current location. C ARB and

Air District staff concluded the physical aspect of the evaluation however the data

review is still ongoing. No act ual changes will occur until US EPA formally a pproves the

newly proposed site. Review and discussions are ongoing.

Imperial County Air Pollution Control District Page 25 of 53

Annual Air Monitoring Network Plan 2013

## Niland

Evaluation of the station shelter has resulted in the determination to replace the current

shelter.

Westmorland

An e lectrical fire resulted in the determination that the current shelter is in need of

replacement. Damage from the fire resulted in the loss of the data logger and ozone

monitor. A proper assessment of the station is pending. On finaliz ation the Air District

will submit the information to US EPA and CARB for discussion and approval.



# VI QUALITY SYSTEM REQUIREMENTS

A Quality Management Plans (QMP) and Quality Assurance Project Plans (QAPP)

Federal regulation requires all organizations to develop a quality system which allows

for the proper management of monitoring information in a systematic and organized

manner. The quality system, when well developed, provides a framework for planning,

implementing, assessing, reporting and for carrying out required quality assurance and

quality control activities. Developing a Quality management plan (QMP) and a qu ality

assurance project plan (Q APP) assures that monitoring results are well

- defined for

need, use, purpose, monitoring objective, as well a s, compliance with applicable

standards and statutory requirements

.

The QMP describes the quality system in terms of the organizational structure,

functional responsibilities of management and staff, lines of authority, and required

interfaces for those planning, implementing, assessing and reporting activities involving

environmental data operations. The QMP must be approved by the Regional

Administrator. The QAPP is a formal document describing the quality system in such a

manner as to assure that th e results of work performed will satisfy the stated objectives.

Ultimately, the monitoring quality system must have a demonstration of adequate

resources both in personnel and funding.

Currently, the Air District is developing its QMP and QAPP and expe cts to have a draft

version of both by fall for review by CARB and US EPA. In addition, all Standard

Operating Procedures, station site visit logs , troubleshooting and check logs have been

updated and are in use by field technicians and reviewers.

B DATA R EVIEW AND SUBMITTAL

Currently, all quality control and assurance procedures are in place, despite the fact that

the QMP and QAPP have not been finalized. In practice, field technicians review and

document all checks, flows, visits and troubleshooting evidence onto logs which are

maintained at each station. All data is reviewed and all instrument systems are verified

in working order o n a daily basis. In order to maintain quality control p rior to sub mitting

certified data to CARB all data is review ed by staff that is not tied to the data generation

activity. Once all data points are checked and verified then staff submits the data in a

Imperial County Air Pollution Control District Page 26 of 53

Annual Air Monitoring Network Plan 2013

## formalized manner as certified data to CARB. In addition to certified data the Air District

remits raw uncertified data for Air Quality Index advisories and forecasts.

Certified data submitted to CARB includes, all 1 hour ozone concentrations, all 1 ho ur

NO, NO 2 

## and NOx concentrations, all CO 1 hour concentrations, all PM 10 

## continuous 1

hour concentrations , all precision and accuracy data and all 1 hour meteorological

concentrations . In addition, the Air District remits all PM 10 

## filter samples to CARB

, via a

chain of custody protocol and PM 2.5 

## filter sample s to the San Diego Air Pollution Control

District (SDAPCD) utilizing the accepted chain of custody protocol for PM 2.5



## . All data is

submitted either by CARB or SDAPCD on to the US EPA Air Quality System (AQS)

after certification by the appropriate agency. Once in AQS US EPA will then affirm

completeness and accuracy on an annual basis.



# VII OVERALL SUMMARY OF THE IMPERIAL COUNTY AMBIENT AIR

MONITORING NETWORK

The followi ng tables and figures summarize the content of information provided within

the descriptive sections of the Network Plan

. Figure 1 on page 7 is a map listing the

c urrent operating ambient air monitoring stations in Imperial County

. Table 25 is a list of

all the Air Quality Monitoring Site locations

. Table 26 lists the pollutants and other

parameters monitored by site. Table 27 lists the criteria pollutant spatial scale and

monitoring objective. All of the monitors operating in Imperial County are part of the

SLAMS network

.

The tables in this section give detailed information relating to the sites and monitors

. They are presented to show compliance with the monitoring requirements found in 40

CFR58.10.

TABLE 25

Ambient Air Quality Monitoring site locations in Imperial County

Location Address ARB

No. AIRS No. Latitude Longitude

Niland 7711 English Road, Niland, CA

92257 13997 060254004 33°12'49" 115°32'43"

Westmorland 570 Cook St., Westmorland, CA

92281 13697 060254003 33°01'57" 115°37'25"

Brawley 220 Main St., Brawley, CA 92227 13701 060250007 32°58'42" 115°32'21"

El Centro 150 S. 9th St., El Centro, CA 92243 13694 060251003 32°47'32" 115°33'47"

Calexico

Ethel 1029 Belcher St., Calexico, CA

922231 13698 060250005 32°40'34" 115°28'59"

Imperial County Air Pollution Control District Page 27 of 53

Annual Air Monitoring Network Plan 2013

### TABLE 26

Pollutants and Parameter Monitored per site

Location Pollutants Monitored Parameters Monitored

Niland O 3 

### , PM 10 

### OT, RH, WD, HWS, BP

Westmorland O 3 

### , PM 10 

### OT, RH, WD, HWS, BP

Brawley PM 10 

### , PM 2.5 

### OT, BP

El Centro CO, NO 2 

### , O 3 

### , PM 10 

### , PM 2.5 

### OT, WD, HWS, BP

Calexico Ethel CO, SO 2 

### , NO 2 

### , PM 10 

### , PM 2.5 

### OT, RH, WD, HWS, BP, SR

Pollutant Parameter

O 3 

### Ozone OT Outside Temperature

PM 10 

### Particulate Matter <10 microns RH Relative Humidity

PM 2.5 

### Particulate Matter < 2.5 microns WD Wind Direction

NO 2 

### Nitrogen Dioxide HWS Horizontal Wind Speed

CO Carbon Monoxide BP Barometric Pressure

SO 2 

### Sulfur Dioxide SR

- Solar Radiation

TABLE 27

Summary of Site Types, Spatial Scales and Purpose

Location CO NO 2 

### SO 2 

### O 3 

### PM 10 

### PM 2.5



### Niland G/B / RS /PE GB/MS /PE

Westmorland R/B/RS /PE R/B/MS /PE

Brawley TC/NS /PE B/T/NS /PE

El Centro HC/NS /PE TC/NS /PE HC/NS /PE TC/NS /PE TC/NS /PE

Calexico Ethel TC/MS /PE HC/US /PE TC/US /PE R/TC/US /PE HC/NS /PE HC/NS /PE

Site Type Spatial Scale Monitoring Purpose

R/TC Regional/Typical Concentrations U S Urban Scale PE Public Exposure

HC Highest Concentrations NS Neighborhood Scale

GB General Background RS Regional Scale

R/B Regional/Background MS Middle Scale

TC Typical Concentrations

B/T Background/Transport

Imperial County Air Pollution Control District Page 28 of 53

Annual Air Monitoring Network Plan 2013

# VIII DETAILED SITE INFORMATION

The following tables and figures were downloaded from the CARB Mon itoring Network

webpage. T he detailed information is a product of State assessment and does not

necessarily reflect the findings within this document. In any event

, this section provides

evidence in addition to the previous pages that all established monitoring sites meet

mini mum federal requirements.

Niland Monitoring Station Details

Sit e Nam e Nil a nd

AQS ID 60254004

G I S Coor d inates L at 33° 1 2 ' 49 " Lo n g 115° 32' 43 "

L oc a t i on L oca t ed in r emote setting near the community of Nil and

Add r ess 771 1 E nglish R oad

, N iland

, CA 92257

Cou n ty I mper i a l Co u nty

Dist. to r oad 20 meters

Tr affic co un t 50 ve h icles pe r day

Gro u nd Cove r D i rt

Represe nt a t ive area MSA ( EI Ce nt ro)

P ollutant O 3 PM10 PM10

Samp l i n g Method AP l /Teledy n e

4 0 0 A A n derso n 1 200 M et One

B A M 1020

Analysis Met h od N / A Weig h ed by

A RB N / A

Start D ate 6/1/1996 6/1/1996 1/7/2009

Ope r atio n Schedule Co n tinuous 1i n 6day Cont i nuous

Samp l i n g Season All year All year A I l year

P robe height 4

. 5m 4

. 5 m 5

. 0m

D ist

. from supporti ng st ru cture 1. 5m 1

. 5 m 1

. 5 m

D ist

. from obstructio n s o n r oof N one N one N o n e

Dist a nce from t r ees N o n e N one N o n e

U nrest r icted a irfl ow 360° 360° 360°

Probe M ate r ial Glass & T e fl on N / A N / A

Residence Ti me 4.7 sec N / A N / A

I s it s u itable f o r comparison agains t the ann u al PM2.5? N / A N o N o

Frequency of flow rate ver i ficatio n f o r ma n ual PM

samp l ers aud it N / A Mont h ly N / A

F r equency of flow r ate v eri fi cation for automated PM

ana l yzers audit N / A N / A Monthly

F requency of 1

- po i nt QC check ( gaseous ) Bi

- Weekly N / A N I A

L ast a n n ua l perfo rm ance eva l uation (gaseous) 1/3 0 /201 3 N/A NIA

L ast two semi

- an n ual flow r ate aud it s for PM monitors N/A 8 / 21/ 12

- 1/30/13 8/2 1/12

- 1/30/13



### Imperial County Air Pollution Control District Page 29 of 53

Annual Air Monitoring Network Plan 2013

## Site Information for Niland

- English Road

AIRS

Number ARB Number Site Start Date Reporting Agency and Agency Code



### 060254004 13997 6/1/96 Imperial County APCD (009)

Site Address County Air Basin Latitude (N) Longitude (W) Elevation

(m)

7711 English

Road, Niland CA

92257 

### Imperial Salton Sea 33.21383

- 115.54448

- 57

Pollutants Monitored (click on parameter link for real

- time data)

Note: multiple monitors may be available through the AQMIS query tool.

O

3 

### , PM

10 

### , BAM

PM10 

### , Outd oor Temperature

, Relative Humidity , Wind Direction, Horizontal

Wind Speed

, Barometric Pressure

Imperial County Air Pollution Control District Page 30 of 53

Annual Air Monitoring Network Plan 2013

# Niland Site Survey Report

Siting Information

Site Name: Niland

- English Road Audit Date: 201 3

- 01

- 3 0 ARB Number: 13997 AIRS Number: 060254004

Address: 7711 English Road

Niland, CA 92257 Latitude: N 33.21383 Longitude: W

- 115.54448 Elevation (m):

- 57

Auditors: Leena Khangura

Alvin Danque Site Technician: Michael Green Site Phone:

Operating Agency: Imperial County APCD Site Report: Yes Site Photos: Yes



# General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: West

Controlled: Yes Description: Remote Site: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 20 meters Region: Valley Probe Clean: Yes

Inside Temp: 23 Degrees Celsius Count (Veh/Day): 50 QA Manual Manifold Clean: N/A

Meteorology Non

- vehicular

Local Sources Approved: Yes Cleaning Schedule: As Needed

Located With Instruments: Yes Description: Agriculture Agency: Imperial County APCD Autocalibrator Type: API 400A IZS

Shadowing: No Distance: 50 meters Urbanization: Remote Site Survey Complete: Yes

Boom Orientation (Deg): 349

Temp(Motor/Natural): Natural Direction: 360 Ground Cover: Gravel Logbook Up To Date: Yes



# Action Items

Comments

Imperial County Air Pollution Control District Page 31 of 53

Annual Air Monitoring Network Plan 2013

# Niland Site Survey Report (Cont.)

Monitor Type Ozone PM10

- SSI BAM Outdoor Temperature

Manufacturer/Model API/Teledyne 400 Anderson 1200 Met One BAM 1020 MET ONE 064

- 2

Serial Number 30333 7377 20005420 X4805

POC 1 1 1 1

Data For Record? Yes Yes Yes Yes

Purpose SLAMS SLAMS SPM SLAMS

Objective POPULATION

EXPOSURE /TRANSPORT POPULATION

EXPOSURE /TRANSPORT SUPPORT

-

Scale REGIONAL MIDDLE

-

Height Above Ground 4.6 4.5 5.2 4.2

Height Above Platform 1.6 1.5 2.2 1.2

Sampler Spacing N/A N/A

Current Manual Available? Yes Yes Yes Yes

Instrument Log Up

- to

- date? Yes Yes Yes Yes

In

- line Filter Change Date 2013

- 01

- 29 N/A N/A N/A

Cal. Gas Cert. Date N/A N/A N/A N/A

Calibration Current? Yes Yes Yes Yes

Calibration Date 5/26/2011 1/26/2011 1/9/2012 2013

- 01

- 10

Cal. Equipment Cert. Date 3/24/2011 12/21/2010 3/16/2011 2012/04/23

Obstacle Description None None None None

Distance to Obstacle

- - - -

Obs. Height Above Inlet

- - - -

Distance to Walls, etc.

- - - -

Distance to Dripline

- - - -

Dominant Influence Agriculture Agriculture Agriculture

-

Residence Time (sec) 4.7 N/A N/A N/A

Monitor Type Wind Direction Horizontal Wind Speed

Manufacturer/Model MET ONE 020

- C MET ONE 010

- C

Serial Number X4362 X4245

POC 1 1

Data For Record? Yes Yes

Purpose SLAMS SLAMS

Objective

- -

Scale

- -

Height Above Ground 8.5 8.5

Height Above Platform

Sampler Spacing N/A N/A

Current Manual Available? Yes Yes

Instrument Log Up

- to

- date? Yes Yes

In

- line Filter Change Date N/A N/A

Cal. Gas Cert. Date N/A N/A

Calibration Current? Yes Yes

Calibration Date 2012

- 11

- 26 2012

- 11

- 27

Cal. Equipment Cert. Date N/A 2012

- 10

- 31

Obstacle Description None None

Distance to Obstacle

- -

Obs. Height Above Inlet

- -

Distance to Walls, etc.

- -

Distance to Dripline

- -

Dominant Influence

- -

Residence Time (sec) N/A N/A



### Imperial County Air Pollution Control District Page 32 of 53

Annual Air Monitoring Network Plan 2013

## Westmorland Monitoring Station Details

Sit e Nam e W e stm o r e l a nd

AQS I D 060254003

G I S Coo r dinates L a t 33 ° 0 1 ' 57" L ong 1 1 5 ° 37' 25 "

L oca t ion L oc a te d i n sub u rban setti n g in t he City of Wes t moreland

Address 570 Cook St.

, West m orela n d

, CA 9228 1

Co u nty I m p e r ial Co u nty

Dist. t o road 20 me t ers

T raffic co u nt 100 vehicles per day

G r oun d Cove r Dirt

Rep r ese n tative a r ea MSA ( EI Ce n tro )

Pollutant O3 PM10

Sampling M e t hod A P l/Teledy n e 400 A n de r son 1200

Ana l ysis Me t hod N / A Weig h ed by ARB

S t a rt Date 4 / 1/93 4 / 1/93

Operat i on Sche d u l e Conti n uo u s 1i n 6day

S a mpling Season All yea r All year

Probe height 5m 5m

Dist. fr o m support i ng s t ructu r e 1 .3 m 1

. 5

D i sl. fr o m obst ru ct i ons on r oo f N one N o n e

D is t a n ce f rom tr ees N one N one

U nrest r icted ai rfl ow 360 ° 360 °

Probe Materia l G l ass & T eflon N / A

Residence Time 6.5 sec N / A

I s it suitable f or compa r ison against the a nn u a l PM2

. 5? N / A N o

Fr equency o f flow rate veri f ica t ion fo r m anual P M samp l e r s

audit N / A Mont h ly

Frequency of fl ow r ate ve r ificat i o n for au t oma t e d PM analyze r s

a ud it N / A N / A

F r equency of 1

- point QC check ( gaseous) Bi

- Week l y N / A

Last a n nual p erforma n ce evalua t io n ( gaseous ) 01/31/12 N / A

L ast two sem i

- annual flow rate audits f or PM mon i tors N / A 08/21/12 01/30/13



### Imperial County Air Pollution Control District Page 33 of 53

Annual Air Monitoring Network Plan 2013

# SITE INFORMATION FOR WESTMORLAND

AIRS Number ARB Number Site Start

Date Reporting Agency and Agency Code



### 060254003 13697 4/1/93 Imperial County APCD (009)

Site Address County Air Basin Latitude (N) Longitude

(W) Elevation

(m)

570 Cook St.,

Westmorland CA

92281 

### Imperial Salton Sea 33.03239

- 115.62362

- 43

Pollutants Monitored (click on parameter link for real

- time data)

Note: multiple monitors may be available through the AQMIS query tool.

O

3 

### , PM

10 

### , Outdoor Temperature

, Relative Humidity , Wind Direction, Horizontal Wind

Speed

, Barometric Pressure

Imperial County Air Pollution Control District Page 34 of 53

Annual Air Monitoring Network Plan 2013

# Westmorland Site Survey Report

Siting Information

Site Name: Westmorland Audit Date: 2013

- 01

- 30 ARB Number: 13697 AIRS Number: 060254003

Address: 570 Cook St.

Westmorland, CA 92281 Latitude: N 33.03239 Longitude: W

- 115.62362 Elevation (m):

- 43

Auditors : Leena Khangura

Alvin Danque Site Technician: Michael Green Site Phone:

Operating Agency: Imperial County APCD Site Report: Yes Site Photos: Yes



# General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: West

Controlled: Yes Description: Rural Site: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 20 meters Region: Level Probe Clean: Yes

Inside Temp: 25 Degrees Celsius Count (Veh/Day): 100 QA Manual Manifold Clean: N/A

Meteorology Non

- vehicular

Local Sources Approved: Yes Cleaning Schedule: As Needed

Located With Instruments: Yes Description: None Agency: Imperial County APCD Autocalibrator Type: API 400A IZS

Shadowing: No Distance: N/A Urbanization: Rural Site Survey Complete: Yes

Boom Orientation (Deg): 347

Temp(Motor/Natural): Natural Direction: N/A Ground Cover: Gravel Logbook Up To Date: Yes



# Action Items

Comments

Imperial County Air Pollution Control District Page 35 of 53

Annual Air Monitoring Network Plan 2013

# Westmorland Site Survey Report (Cont.)

Monitor Type Ozone PM10

- SSI Outdoor Temperature

Manufacturer/Model API/Teledyne 400 Anderson 1200 MET ONE 064

- 2

Serial Number 30331 P1770 X4808

POC 1 1 1

Data For Record? Yes Yes Yes

Purpose SLAMS SLAMS SLAMS

Objective PUBLIC

EXPOSURE/TRANSPORT PUBLIC

EXPOSURE/TRANSPORT

-

Scale REGIONAL MIDDLE

-

Height Above Ground 4.3 4.6 4

Height Above Platform 1.2 1.5 0.9

Sampler Spacing N/A N/A

Current Manual Available? Yes Yes Yes

Instrument Log Up

- to

- date? Yes Yes Yes

In

- line Filter Change Date 1/27/2012 N/A N/A

Cal. Gas Cert. Date N/A N/A N/A

Calibration Current? No Yes No

Calibration Date 3/3/2011 1/26/2011 1/26/2011

Cal. Equipment Cert. Date 12/15/2010 12/21/2010 1/11/2011

Obstacle Description None None None

Distance to Obstacle

- - -

Obs. Height Above Inlet

- - -

Distance to Walls, etc.

- - -

Distance to Dripline

- - -

Dominant Influence Vehicular Vehicular

-

Residence Time (sec) 6.5 N/A N/A

Monitor Type Horizontal Wind Speed

Manufacturer/Model MET ONE 010

- C

Serial Number X4246

POC 1

Data For Record? Yes

Purpose SLAMS

Objective

-

Scale

-

Height Above Ground 8.5

Height Above Platform

Sampler Spacing N/A

Current Manual Available? Yes

Instrument Log Up

- to

- date? Yes

In

- line Filter Change Date N/A

Cal. Gas Cert. Date N/A

Calibration Current? Yes

Calibration Date 11/30/2011

Cal. Equipment Cert. Date 12/28/2010

Obstacle Description None

Distance to Obstacle

-

Obs. Height Above Inlet

-

Distance to Walls, etc.

-

Distance to Dripline

-

Dominant Influence

-

Residence Time (sec) N/A



### Imperial County Air Pollution Control District Page 36 of 53

Annual Air Monitoring Network Plan 2013

## Brawley Monitoring Station Details

Site N ame Brawley

ADS 10 060250007

G I S Coordi n ates Lat 32 ° 58 ' 42 " Long 11 5 ° 32 ' 21"

L ocation Located in city cen t er setting in the City of Brawley

Add r ess 220 Ma in St.

, Brawley

, CA 92227

Cou nt y Imperial Co unt y

Dist. to r oad 30 me t ers

Traffic cou nt 5000 ve h icles per day

Ground Cove r Roo f

Representative area MSA ( EI Centro)

Pollutant PM 2.5 PM10 PM10

Sampling Method R&P seq

. W IN S Anderson 1200 BAM 1020

A nal ysis Method Weighed by

S D APC D Weighed by

ARB N / A

S t art Date 01/01/04 0 1 / 0 1 / 04 0 1 /0 7 / 09

Operat i on Sc h ed u le 1 in 3 day 1 in 6 d ay Co nt inuo u s

Sampling Seaso n A ll year All year All yea r

Pro be height 10

. 0 m 10

. 0m 10.0 m

Di st. f rom supporting structure 1 .5 m 1

. 5 m 1

. 5 m

Di st. fr o m obstructions on roof No ne None N one

D i stance f rom tr ees N one N one N one

Unre s t ricted airflow 360 ° 360 ° 360 °

Probe Material N / A N / A N / A

Residence T ime N / A N / A N / A

I s it suitable for compariso n against the an nu al PM2

. 5? Yes N o No

Frequency o f flow r ate veri f ication f or manual PM samplers aud i t Monthly Monthly N / A

Frequency of flow rate ve r ifica t ion for automated PM analyze r s audit N / A N / A Monthly

Frequency of 1

- point QC check (gaseous ) N / A N / A N / A

Last ann u al performa n ce eva lua t i on ( gaseous ) N / A N / A N / A

Last two semi

- annua l flow rate audi t s for PM monitors 08/21/12

01/31/13 08/21/12

01/31/13 08/21/12

01/31/13



### Imperial County Air Pollution Control District Page 37 of 53

Annual Air Monitoring Network Plan 2013

## Site Information for Brawley

- Main Street

AIRS Number ARB Number Site Start Date Reporting Agency and Agency Code



### 060250007 13701 1/1/04 Imperial County APCD (009)

Site Address County Air Basin Latitude (N) Longitude (W) Elevation

220 Main St., Brawley

CA 92227 

### Imperial Salton Sea 32 o 

### 58' 42" 115 o 

### 32' 21"

- 13

Pollutants Monitored (click on parameter link for real

- time data)

PM

10 

### , BAM

PM10 

### , PM

2.5 

### , Outdoor Temperature

Imperial County Air Pollution Control District Page 38 of 53

Annual Air Monitoring Network Plan 2013

# Brawley Site Survey Report

Siting Information

Site Name: Brawley

- Main Street #2 Audit Date: 01/31/13 ARB Number: 13701 AIRS Number: 060250007

Address: 220 Main St.

Brawley, CA 92227 Latitude: N 32.97831 Longitude: W

- 115.53904 Elevation (m):

- 15

Auditors: Leena Khangura

Alvin Danque Site Technician: Mike Green Site Phone:

Operating Agency: Imperial County APCD Site Report: Yes Site Photos: Yes



# General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: South

Controlled: Yes Description: Commercial Site: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 30 meters Region: Level Probe Clean: N/A

Inside Temp: 25 Degrees Celsius Count (Veh/Day): 5000 QA Manual Manifold Clean: N/A

Meteorology Non

- vehicular

Local Sources Approved: Yes Cleaning Schedule: N/A

Located With Instruments: Yes Description: None Agency: Imperial County APCD Autocalibrator Type: N/A

Shadowing: No Distance: N/A Urbanization: City Center Site Survey Complete: Yes

Boom Orientation (Deg): N/A

Temp(Motor/Natural): Direction: N/A Ground Cover: Roof Logbook Up To Date: Yes



# Action Items

Comments

Imperial County Air Pollution Control District Page 39 of 53

Annual Air Monitoring Network Plan 2013

# Brawley Site Survey Report (Cont.)

Monitor Type PM10

- SSI BAM PM2.5 Outdoor Temperature

Manufacturer/Model GMW 1200 Met One BAM 1020 R&P 2025 MET ONE 064

- 2

Serial Number 7346 20021472 20020954 B1681

POC 1 1 1 1

Data For Record? Yes Yes Yes Yes

Purpose SLAMS SPM SLAMS SLAMS

Objective POPULATION EXPOSURE SUPPORT POPULATION EXPOSURE

-

Scale NEIGHBORHOOD NEIGHBORHOOD

-

Height Above Ground 10 10 10 10

Height Above Platform 1.7 2.4 1.5 1

Sampler Spacing N/A

Current Manual Available? No No No No

Instrument Log Up

- to

- date? Yes Yes Yes Yes

In

- line Filter Change Date N/A N/A N/A N/A

Cal. Gas Cert. Date N/A N/A N/A N/A

Calibration Current? Yes Yes Yes Yes

Calibration Date 1/25/2011 1/9/2012 1/9/2012 1/25/2011

Cal. Equipment Cert. Date 12/21/2010 3/16/2011 3/16/2011 1/11/2011

Obstacle Description None None None None

Distance to Obstacle

- - - -

Obs. Height Above Inlet

- - - -

Distance to Walls, etc.

- - - -

Distance to Dripline

- - - -

Dominant Influence Vehicular Vehicular Vehicular

-

Residence Time (sec) N/A N/A N/A N/A



### Imperial County Air Pollution Control District Page 40 of 53

Annual Air Monitoring Network Plan 2013

## El Centro Monitoring Station Details

Sit e Nam e EI C entr o

AQS I D 06025 1 003

G I S Coord i n ates L a t 32 ° 47' 32 " L ong 115 ° 33 ' 4 7"

L oca t io n L oca t ed in city center setting in the City of EI Centro

A dd ress 1 50 S

. 9th St.

, E I Ce nt ro

, CA 922 4 3

Co u nty I mperia l Cou nt y

D i s t

. to road 30 m ete r s

Tr affic coun t 2500 veh i cles pe r day

G ro u n d Cove r R oof

Representative area MSA ( EI Centro)

Pollutant NO2 O 3 CO PM2 .5 PM10

Sa m p l ing Me t ho d A PI 200A A P l / Teledyne T 400 A PI T 300 R&P seq

. W IN S A n de r so n 1 200

Ana l ysis Method N / A N / A N / A Weighed by

S D A P CD Weighed by A RB

Start D ale 2 / 1 / 88 2 / 1 / 88 2 / 1 / 88 2 / 1 / 88 2 / 1 / 88

Opera t ion Schedule Contin u ous Continuous Con t inuo u s 1 in 3 day 1 i n 6 day

Sampling Season All year All year All year All yea r A ll year

P robe h eig h t 9

. 2 m 9

. 2 m 9

. 2 10.0 m 1 0

. 0 m

D is t . from suppo rt ing s t ructu r e 1

. 8 m 1

. 8m 1. 8 m 1 .5 m 1

. 5m

D is t. f r om o b st r uc ti ons on r oo f N o n e N one Non e N one No ne

D ist a nce from trees N o n e N one N one N one N o n e

U nrest r ic t e d a i rflow 360 ° 360 ° 360 ° 360 ° 360 °

P r o be M ateria l Glass &

T eflo n Glass & Teflon Glass &

T eflo n N / A N / A

Residence T i me 8.6 sec 8.1 sec 8.8 sec N / A N / A

I s it su it able f o r compa r ison

against the an n ual PM2

. 5? N / A N / A N / A Yes N o

F req u ency of fl ow r ate

verifica t ion f o r m a nu al PM

samplers audit N / A N / A N / A M on t hly Mont h ly

F r equency o f flow ra t e

veri fi cat i on f or automated P M

ana l yze r s audit N / A N / A N / A N / A N / A

F reque n c y of 1

- po i nt QC

check (gaseous) Bi

- Weekly Bi

- Weekly Bi

- Weekly N / A N / A

L ast an n ua l perfo r mance

evaluat i on ( gaseous ) 01/25/12 01/25/12 01/25/12 N/A N/A

L ast two semi

- an n ual flo w r a t e

audi t s fo r P M moni t ors N/A N/A N/A 08/21/12

02/05/13 08/21/12

02/05/13



### Imperial County Air Pollution Control District Page 41 of 53

Annual Air Monitoring Network Plan 2013

## Site Information for El Centro

- 9th Street

AIRS

Number ARB Number Site Start Date Reporting Agency and Agency Code



### 060251003 13694 2/1/88 Imperial County APCD (009)

Site Address County Air Basin Latitude (N) Longitude

(W) Elevation (m)

150 9th St, El Centro

CA 92243 

### Imperial Salton Sea 32.79215

- 115.56299 9

Pollutants Monitored (click on parameter link for real

- time data)

Note: multiple monitors may be available through the AQMIS quer y tool.

CO

, NO

2 

### , O

3 

### , PM

10 

### , PM

2.5 

### , Outdoor Temperature , Wind Direction, Horizontal Wind Speed

, Barometric Pressure

Imperial County Air Pollution Control District Page 42 of 53

Annual Air Monitoring Network Plan 2013

# El Centro Site Survey Report

Siting Information

Site Name: El Centro

- 9th Street Audit Date 2013

- 02

- 05 ARB Number: 13694 AIRS Number: 060251003

Address: 150 9th St

El Centro, CA 92243 Latitude: N 32.79215 Longitude: W

- 115.56299 Elevation (m): 9

Auditors : Leena Khangura

Harnek Nijjar Site Technician: Mike Green Site Phone:

Operating Agency: Imperial County APCD Site Report: Yes Site Photos: Yes



# General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: South

Controlled: Yes Description: Residential Site: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 30 meters Region: Level Probe Clean: Yes

Inside Temp: 22 Degrees Celsius Count (Veh/Day): 2500 QA Manual Manifold Clean: Yes

Meteorology Non

- vehicular

Local Sources Approved: Yes Cleaning Schedule: As Needed

Located With Instruments: Yes Description: None Agency: Imperial County APCD Autocalibrator Type: Environics 9100

Shadowing: No Distance: N/A Urbanization: City Center Site Survey Complete: Yes

Boom Orientation (Deg): 348

Temp(Motor/Natural): Natural Direction: N/A Ground Cover: Roof Logbook Up To Date: Yes



# Action Items

Comments

Imperial County Air Pollution Control District Page 43 of 53

Annual Air Monitoring Network Plan 2013

# El Centro Site Survey Report (Cont.)

Monitor Type Carbon Monoxide Nitrogen Dioxide Ozone PM10

- SSI

Manufacturer/Model API 300 API 200A API/Teledyne 400 SA 1200

Serial Number 30490 2350 30332 7661

POC 1 1 1 1

Data For Record? Yes Yes Yes Yes

Purpose SLAMS SLAMS SLAMS SLAMS

Objective POPULATION EXPOSURE POPULATION EXPOSURE POPULATION

EXPOSURE POPULATION

EXPOSURE

Scale NEIGHBORHOOD NEIGHBORHOOD NEIGHBORHOOD NEIGHBORHOOD

Height Above Ground 9.3 11.1 11.1 9.8

Height Above Platform 1.8 1.8 1.8 1.4

Sampler Spacing N/A N/A N/A

Current Manual Available? Yes Yes Yes Yes

Instrument Log Up

- to

- date? Yes Yes Yes Yes

In

- line Filter Change Date 2013

- 01

- 29 2013

- 01

- 29 2013

- 01

- 29 N/A

Cal. Gas Cert. Date 2012

- 02

- 02 2012

- 02

- 02 N/A N/A

Calibration Current? Yes Yes Yes Yes

Calibration Date 2013

- 01

- 17 2013

- 01

- 17 2013

- 01

- 16 1/27/2011

Cal. Equipment Cert. Date 2012

- 11

- 16 2012

- 11

- 16 2012

- 03

- 02 2012

- 04

- 24

Obstacle Description None None None None

Distance to Obstacle

- - - -

Obs. Height Above Inlet

- - - -

Distance to Walls, etc.

- - - -

Distance to Dripline

- - - -

Dominant Influence Vehicular Vehicular Vehicular Vehicular

Residence Time (sec) 8.8 8. 6 8. 1 N/A

Monitor Type PM2.5 Outdoor Temperature Wind Direction Horizontal Wind

Speed

Manufacturer/Model R&P 2025 MET ONE 064

- 2 MET ONE 020

- C MET ONE 010

- C

Serial Number 20020959 X4806 X

- 436 0 X4243

POC 1 1 1 1

Data For Record? Yes Yes Yes Yes

Purpose SLAMS SLAMS SLAMS SLAMS

Objective POPULATION EXPOSURE

- - -

Scale NEIGHBORHOOD

- - -

Height Above Ground 9.8 9.3 9.3 9.3

Height Above Platform 2.1 1.8 2.7 2.7

Sampler Spacing N/A N/A N/A

Current Manual Available? Yes Yes Yes Yes

Instrument Log Up

- to

- date? Yes Yes Yes Yes

In

- line Filter Change Date N/A N/A N/A N/A

Cal. Gas Cert. Date N/A N/A N/A N/A

Calibration Current? Yes Yes Yes Yes

Calibration Date 2013

- 01

- 15 2012

- 08

- 22 2012

- 11

- 28 2012

- 11

- 28

Cal. Equipment Cert. Date 2012

- 01

- 26 4/23/12 N/A 2012

- 10

- 31

Obstacle Description None None None None

Distance to Obstacle

- - - -

Obs. Height Above Inlet

- - - -

Distance to Walls, etc.

- - - -

Distance to Dripline

- - - -

Dominant Influence Vehicular

- - -

Residence Time (sec) N/A N/A N/A N/A



### Imperial County Air Pollution Control District Page 44 of 53

Annual Air Monitoring Network Plan 2013

## Calexico

- Ethel Monitoring Station Details

Site Name Calexico

- Ethe l

AQS ID 060250005

G I S Co o rdinates La t 32 ° 40' 34" Long 11 5° 28' 59 "

Locatio n Located in suburban ( residential ) area next t o a s c ho o l in Cit y of

Calexico

Address 1020 Belcher St.

, Calexico

, CA 92231

County Imper ial County

Dist. to road 20 meters

Traffic count 7000 vehicles per day

Ground Cover Asphalt

Representative area MSA ( EI Centro)

Pollutant NO2 O 3 CO SO, PM2

. 5 PM2

. 5 PM10 TSP

Sampl in g M ethod API 200 e APl 400 e API 300eu Thermo

43i

- TLE R&P seq

. WI N S BAM 1020 Anderson

1200 Anderson

1200

Analysis Method N/A N/A N/A N/A We igh ed

by AR B N/A We i ghed

by AR B Weighed

by AR B

Start Date 3/1/94 3/1/94 3/1/94 3/1/94 3/1/94 3/1/94 3/1/94 3/1/94

Opera t ion Schedule Cont inuou s Cont inuou s Co n t inuous Cont in uo u s 1 in 3day Cont inuou s 1 in 6

d ay 1 in 6

da y

Samp lin g Season All year All year All year All year All year All year All year A ll year

Probe height 5

. 7 m 5.7 m 5.7m 5. 7m 2

. 5m 2. 5m 6

. 0m 6

. 0m

D ist . from support in g

structure 2

. 2m 2

. 2 m 2

. 2m 2

, 2m 1

. 5m 1

. 5m 1

. 5m 1.5 m

D i s t. from obstructions on

roof N one N one None No ne N one None No ne N one

D i stance from trees N one N one N one N one 3.5 m 3.5 m 5 m

-

U nrestricted a i rflow 360° 360° 360° 360° 360° 360° 360° 360°

Probe Mate rial G l ass &

Te flon Glass &

T eflon Glass &

Te flon G lass &

T eflon N/A N/A N/A N/A

Res i dence T im e 9.6 sec 6

. 3 sec 7

. 1 sec 10

. 3 sec N/A N/A N/A N/A

Is it suitab l e for comparison

aga in st the annua l P M 2

. 5? N/A N/A N/A N/A Yes yes N o No

Freque ncy of flow rate

verification fo r manual PM

samplers audit N/A N / A N / A N/ A Mo n th ly N IA Mo n t hl y Month ly

Freque ncy of flow rate

v e rifi cat ion f or au t omated

PM ana l yzers a udi t N/A N/A N/A N/A N/A M onthly N/A N/A

Freq u e ncy of 1

- ponit QC

check (g ase ous) B i

- Wee kly Bi

- Wee kly B i

- W eek l y BI

- Week ly N/A N/A N/A N/A

last a nnu a l performance

evalu at ion (gaseous) 01 / 24 /1 2 0 1 / 24 /1 2 0 1 / 24 /1 2 0 1 / 24 /1 2 N/A N/A N/A N/A

Last two se mi

- a nnu a l fl o w

rate a udi ts f or PM monitor s N/A N/A N/A N/A 8/22/12

1/29/13 8/22/12

1/29/13 8/22/12

1/29/13 8/22/12

1/29/13



### Imperial County Air Pollution Control District Page 45 of 53

Annual Air Monitoring Network Plan 2013

## Calexico

- Ethel Monitoring Station Details

AIRS

Number ARB Number Site Start Date Reporting Agency and Agency Code



### 060250005 13698 3/1/94 California Air Resources Board (001)

Site Address County Air Basin Latitude (N) Longitude

(W) Elevation

1029 Belcher St, Calexico

CA 92231 

### Imperial Salton Sea 32 o 

### 40' 34" 115 o 

### 28' 59" 6

Pollutants Monitored (click on parameter link for real

- time data)

CO

, SO

2 

### , NO

2 

### , H

2 

### S

, O

3 

### , PM

10 

### , BAM

PM2.5 

### , PM

2.5 

### , TSP, Toxics, Cr 6+



### , Outdoor Temperature

, Re lative Humidity , Wind Direction, Horizontal Wind Speed

, Barometric Pressure , Solar

Radiation

Imperial County Air Pollution Control District Page 46 of 53

Annual Air Monitoring Network Plan 2013

# Calexico Site Survey Report

Site Survey Report

Siting Information

Site Name: Calexico

- Ethel Street Audit Date: 2013

- 01

- 29 ARB Number: 13698 AIRS Number: 060250005

Address: 1029 Belcher St

Calexico, CA 92231 Latitude: N 32.67618 Longitude: W

- 115.48307 Elevation (m): 3

Auditors: Leena Khangura

Alvin Danque Site Technician: Tony Royer Site Phone:

Operating Agency: California Air Resources Board Site Report: Yes Site Photos: Yes



# General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: West

Controlled: Yes Description: Residential Site: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 20 meters Region: Level Probe Clean: Yes

Inside Temp: 22 Degrees Celsius Count (Veh/Day): 7000 QA Manual Manifold Clean: Yes

Meteorology Non

- vehicular

Local Sources Approved: Yes Cleaning Schedule: Annually

Located With Instruments: Yes Description: Parking lot Agency: Air Resources Board Autocalibrator Type: Environics 9100

Shadowing: No Distance: 3 meters Urbanization: Rural Site Survey Complete: Yes

Boom Orientation (Deg): 348

Temp(Motor/Natural): Motor Direction: 270 Ground Cover: Dirt Logbook Up To Date: Yes



# Action Items

Comments

Imperial County Air Pollution Control District Page 47 of 53

Annual Air Monitoring Network Plan 2013

# Calexico Site Survey Report (Cont.)

Monitor Type Nitrogen

Dioxide Ozone PM10

- SSI TSP

Manufacturer/Model API 200E API/Teledyne 400 SA 1200 Tisch TSP

Serial Number 20071346 1302 20004783 20081137

POC 1 1 1 1

Data For Record? Yes Yes Yes Yes

Purpose SLAMS SLAMS SLAMS SLAMS

Objective HIGHEST

CONCENTRATION REGIONAL/TYPICAL

CONCENTRATIONS HIGHEST

CONCENTRATIO N STATE REQUIREMENT

Scale URBAN URBAN NEIGHBORHOOD

-

Height Above Ground 5.7 5.7 6 5.4

Height Above Platform 1.7 1.7 1.5 1.4

Sampler Spacing N/A N/A 2

Current Manual Available? Yes Yes Yes Yes

Instrument Log Up

- to

date? Yes Yes Yes Yes

In

- line Filter Change Date 1/24/2013 1/24/2013 N/A N/A

Cal. Gas Cert. Date 2/2/2012 N/A N/A N/A

Calibration Current? Yes Yes No No

Calibration Date 7/19/2012 6/27/2012 8/7/2011 1/28/2010

Cal. Equipment Cert. Date 7/19/2012 3/2/2012 Not Available Not Available

Obstacle Description None None None None

Distance to Obstacle

- - - -

Obs. Height Above Inlet

- - - -

Distance to Walls, etc.

- - - -

Distance to Dripline

- - - -

Dominant Influence Vehicular Vehicular Vehicular

Residence Time (sec) 9.9 6.3 N/A N/A

Monitor Type BAM

- PM2.5 BAM

- PM2.5 PM2.5 PM2.5

Manufacturer/Model Met One BAM

1020 Met One BAM

1020 R &P 2025 R & P 2025i

Serial Number 20020893 20021151 20020964 20103888

POC 3 4 1 2

Data For Record? Yes Yes Yes Yes

Purpose SPM SPM SLAMS Collocation

Objective SUPPORT SUPPORT HIGHEST

CONCENTRATION HIGHEST

CONCENTRATION

Scale Neighborhood Neighborhood Neighborhood Neighborhood

Height Above Ground 5.7 5.7 3 3

Height Above Platform 1.7 1.7 2 2

Sampler Spacing 2 2 1 1

Current Manual Available? Yes Yes Yes Yes

Instrument Log Up

- to

- date? Yes Yes Yes Yes

In

- line Filter Change Date N/A N/A N/A N/A

Cal. Gas Cert. Date N/A N/A N/A N/A

Calibration Current? Yes Yes Yes Yes

Calibration Date 11/30/2012 11/30/2012 10/16/2012 1/17/2013

Cal. Equipment Cert. Date 9/20/2012 9/20/2012 9/20/2012 9/20/2012

Obstacle Description None None None None

Distance to Obstacle

- - - -

Obs. Height Above Inlet

- - - -

Distance to Walls, etc.

- - - -

Distance to Dripline

- - - -

Dominant Influence Residential Residential Vehicular Vehicular

Residence Time (sec) N/A N/A N/A N/A



### Imperial County Air Pollution Control District Page 48 of 53

Annual Air Monitoring Network Plan 2013

# Calexico Site Survey Report (Cont.)

Monitor Type Xontech Outdoor

Temperature Wind Direction Horizontal Wind

Speed Barometric

Pressure

Manufacturer/Model Xontech 924 MET ONE 060A MET ONE 020 MET ONE 010 MET ONE 090C

Serial Number 20021009 P8795 P3078 E1112 60250005

POC 7 1 1 1 1

Data For Record? Yes Yes Yes Yes Yes

Purpose Unknown SLAMS SLAMS SLAMS Other

Objective UNKNOWN

- - - -

Scale

- - - -

Height Above Ground 5.5 8 10 10 6

Height Above Platform 1

Sampler Spacing N/A N/A N/A N/A

Current Manual Available? Yes Yes Yes Yes Yes

Instrument Log Up

- to

date? Yes Yes Yes Yes Yes

In

- line Filter Change Date N/A N/A N/A N/A N/A

Cal. Gas Cert. Date N/A N/A N/A N/A N/A

Calibration Current? Yes No No No No

Calibration Date 6/7/2012 2/2/2010 2/2/2010 2/2/2010 2/2/2010

Cal. Equipment Cert. Date 3/2/2012 Not Available N/A Not Available Not Available

Obstacle Description None None None None None

Distance to Obstacle

- - - - -

Obs. Height Above Inlet

- - - - -

Distance to Walls, etc.

- - - - -

Distance to Dripline

- - - - -

Dominant Influence Vehicular

- - - -

Residence Time (sec) N/A N/A N/A N/A N/A



### Imperial County Air Pollution Control District Page 49 of 53

Annual Air Monitoring Network Plan 2013

# APPENDIX A

Regulatory language of 40 CFR 58.10

**§ 58.10 Annual monitoring network plan and periodic network**  **assessment.**

(a)(1) Beginning July 1, 2007, the State

, or where applicable local

, agency shall adopt

and submit to the Regional Administrator an annual monitoring network plan which shall

provide for the establishment and maintenance of an air quality surveillance system that

consists of a network o f SLAMS monitoring stations including FRM, FEM, and ARM

monitors that are part of SLAMS, NCore stations, STN stations, State speciation

stations, SPM stations, and / or

, in serious

, severe and extreme ozone nonattainment

areas

, PAMS stations

, and SPM monitor ing stations. The plan shall include a statement

of purposes for each monitor and evidence that siting and operation of each monitor

meets the requirements of appendices A

, C

, D, and E of this part, where applicable

. The

annual monitoring network plan must be made available for public inspection for at least

30 days prior to submission to US EPA.

(2) Any annual monitoring network plan that proposes SLAMS network modifications

including new monitoring sites is subject to the approval of the US EPA Regional

Administrator

, who shall provide opportunity for public comment and shall approve or

disapprove the plan and schedule within 120 days. If the State or local agency has

already provided a public comment opportunity on its plan and has made no changes

subse quent to that comment opportunity, the Regional Administrator is not required to

provide a separate opportunity for comment.

(3) The plan for establishing required NCore multi

- pollutant stations shall be submitted

to the Administrator not later than July 1

, 2009. The plan shall provide for all required

stations to be operational by January 1

, 2011

. (b) The annual monitoring network plan must contain the following information for each

existing and proposed site:

(1) The AQS site identification number.

(2) The location

, including street addres s and geographical coordinates.

(3) The sampling and analysis method(s) for each measured parameter

.

(4) The operat ing schedules for each monitor.

Imperial County Air Pollution Control District Page 50 of 53

Annual Air Monitoring Network Plan 2013

## (5) Any proposals to remove or move a monitoring station within a period of 18 months

following plan submittal.

(6) The monitoring objective and spatial s c ale of representativeness for each monitor as

defined in appendix 0 to this part.

(7) The identification of any sites that are suitable and sites t hat are not suitable for

comparison against the annual PM2.5NAAOS as described in §58.30.

(8) The MSA, CBSA

, CSA or other area represented by the monitor.

(c) The annual monitoring network plan must document how States and local agencies

provide for the review of changes to a PM2.5 monitoring network that impact the

location of a violating PM2

. 5 monitor or the creation / change to a community monitoring

zone

, including a description of the proposed use of spatial averaging for purposes of

ma king comparisons to the annual PM2.5 NAAOS as set forth in appendi x N to part 50

of this chapter. The affected State or local agency must document the process for

obtaining public comment and include any comments received through the public

notification process within their submitted plan.

(d) The State, or where applicable local

, agency shall perform and submit to the EPA

Regional Administrator an assessment of the air quality surveillance system every 5

years t o determine, at a minimum, if the network meets the monitoring objectives

defined in appendix 0 to this part

, whether new sites are needed, whether existing sites

are no longer needed and can be terminated, and whether new technologies are

appropriate for incorporation into the ambient air monitoring network. The network

assessment must consider the ability of existing and proposed sites to support air

quality characterization for areas with relatively high populations of susceptible

individuals (e.g

., chil dren with asthma)

, and, for any sites that are being proposed for

discontinuance, the effect on data users other than the agency itself, such as nearby

States and Tribes or health effects studies. For PM2.5, the assessment also must

identify needed changes to population

- oriented sites. The State

, or where applicable

local

, agency must submit a copy of this 5

- year assessment, along with a revised

annual network plan, to the Regional Administrator

. The first assessment is due July 1,

2010.

(e) A ll pro posed additions and discontinuations of SLAMS monitors in annual monitoring

network plans and periodic network assessments are subject to approval according to

§58.14.

Imperial County Air Pollution Control District Page 51 of 53

Annual Air Monitoring Network Plan 2013

# Glossary of Acronyms

AQI Air Quality Index

AQS Air Q uality S ystem

ARM Approved R egional M ethod

BAM Beta Att enuation Mass Monitor

CARB California Air Resources Board

CFR Code of Federal Regulations

CO Carbon monoxide

FEM Federal equivalent method

FRM Federal reference method

MSA Metropolitan Statistical Area

NAAQS Nat ional A mbient A ir Q uality S tandard

Ncore National Core A mbient Monitoring N etwork

NO 2 

### Nitrogen D ioxide

O 3 

### Ozone

PAMS Photochemical A ssessment M onitoring S ites

Pb Lead

PE Public Exposure

PM 10 

### Particulate Matter less than 10 microns in diameter

PM 2.5 

### Particulate Matter less than 2.5 microns in diameter

PM 10

- 2.5 

### Coarse Particulate Matter

ppm Parts per million

PQAO Primary Quality Assurance Organization

PWEI Population Weighted Emission Index

SDAPCD San Diego Air Pollution Control District

SIP Sta te implementation plan

SLAMS State and Local Air Monitoring Station

SO 2 

### Sulfur Dioxide

Page 52 of 53

### SPM Special Purpose Monitor

SSI Size Selective Inlet

TCP Transmission Control Protocol

US EPA United States Environmental Protection Agency

Page 53 of 53