# Ambient

Air Monitoring

Network

Plan 

# 2013

Ventura County Air Pollution Control District Monitoring Division

KENT FIELD, MANAGER 669 COUNTY SQUARE DRIVE • VENTURA, CA 93003 • 805

- 645

- 1400

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

I VENTURA COUNTY APCD MONITORING DIVISION 

## Table of Contents

1 Introduction

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

2 Overview of Network Operation

................................ ................................ .................... 2

2.1 Ambient Air Monitoring Network in Ventura County

................................ ..................... 2

2.2 Monitoring Objectives and Spatial Scales

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

2.3 Local Monitoring Objectives and Local Spatial Scales

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

2.3.1 Ozone Monitoring Network

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

2.3.2 PM 2.5 

### and PM 10 

### Monitoring Network

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

2. 3.3 Speciation Trends Network (STN), Chemical Speciation Network (CSN)

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

2.3.4 Photochemical Assessment Monitoring Stations (PAMS)

................................ ........ 11

2.3.5 California Air Resources Board Toxic Air Contaminant Sa mpling

............................ 11

2.4 Air Quality Data

................................ ................................ ................................ ........... 11

3 Recent and Pending Modifications to the Air Monitoring Network

............................ 13

3.1 Network Operations

- July 2012 to June 2013

................................ .......................... 13

3.1.1 Network Operations with No Recent Changes

................................ .......................... 13

3.1.2 Recent Changes to the PM 2.5 

### and PM 10 

### Monitoring Networks

................................ . 13

3.1.3 Recent Changes to the Data Acquisition and Management Sy stem

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

3.1.4 Recent Changes to Laboratory Filter Processing Operations

................................ ... 15

3.1.5 Replacement of Analyzers and Equipment Since Last Reporting Period

................ 15

3.2 Network Ope rations

– Post June 2013

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

3.2.1 Network Operations with No Proposed Changes

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

3.2.2 Future Changes to the PM 2.5 

### and PM 10 

### Monitoring Network

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

3.2.3 Future Changes to the Speciation Trends Network

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

3.2.4 Future Changes

- New NO 2 

### Near

- Road Monitoring Station

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

3.2.5 Future Changes to the PAMS Network

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

3.2.6 Future Changes t o the Data Acquisition and Management System

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

3.2.7 Future Replacement of Analyzers and Equipment

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

Appendix A 2013 Annual Air Monitoring Network Plan Checklist

................................ .... A

- 1 Appendix B Detailed Site I nformation

................................ ................................ ................ B

- 1 Appendix C Minimum Monitoring Requirements

................................ ............................... C

- 1 Appendix D Ambient Air Quality Standards as of 2012

................................ .................... D

- 1 Appendix E Collocation Requirements

................................ ................................ .............. E

- 1 Appendix F Air Monitoring N etwork Related Correspondence

................................ .. F

- 1



## List of Figures

Figure 1

– VCAPCD Monitoring Regions and Ambient Monitoring Stations

.................... 4

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II VENTURA COUNTY APCD MONITORING DIVISION 

## List of Tables

Table 1

– Air Monitoring Stations and Pollutants Monitored in 2013

............................... 3

Table 2

– Site Types and Appropriate Spatial Scales

................................ ..................... 7
Table 3

– Pollutants, Monitoring Objectives and Spatial Scales

................................ ...... 7
Table 4

– Local Air Monitoring Regions

- Area and Populati on Served

........................... 9
Table 5

– Sources of Ambient Air Quality Data

................................ ............................. 12
Table 6

– Analyzer and Equipment Replacement

– July 2012 to June 2013

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

Table 7

– Analyzer and Equipment Replacement

– Post June 2013

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

Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring

Network Plan

................................ ................................ ............................... A

- 2
Table 9

– El Rio Station Information

................................ ................................ ............. B

- 1
Table 10

– Ojai Station Information

................................ ................................ .............. B

- 5
Table 11

– Piru Station Information

................................ ................................ .............. B

- 7
Table 12

– Simi Valley Station Information

................................ ................................ ... B

- 9
Table 13

– Thousand Oaks Station Inform ation

................................ ......................... B

- 15

Table 14

– Simi Valley

– Upper Air Station Information

................................ .............. B

- 17

Table 15

– Meteorological Data Collected at Sites

................................ ..................... B

- 17
Table 16

– Minimum Monitoring Requiremen ts for Ozone

................................ .......... C

- 1

Table 17

– Minimum Monitoring Requirements for PM 2.5 

### SLAMS

............................... C

- 2
Table 18

– Minimum Monitoring Requirements for Continuous PM 2.5 

### Monitors

.......... C

- 2

Table 19

– Minimum Monitoring Requirements for PM 10



### ................................ ............. C

- 3
Table 20

– Minimum Monitoring Requirements for PM 10

- 2.5



### ................................ ......... C

- 3

Table 21

– Minimum Monitoring Requirements for NO 2



### ................................ .............. C

- 4

Tabl e 22

– Minimum Monitoring Requirements for SO 2



### ................................ .............. C

- 5
Table 23

– Minimum Monitoring Requirements for CO

................................ ............... C

- 5
Table 24

– Minimum Monitoring Requirements for Pb at NCore

................................ . C

- 6
Table 25

– Source Oriented Lead Monitoring (Including Airports)

............................... C

- 6
Table 26

– Ambient Air Quality Standards

................................ ................................ .. D

- 1

Table 27

– VCAPCD Air Monitoring Network Correspondence

................................ .... F

- 1

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III VENTURA COUNTY APCD MONITORING DIVISION 

## Glossary of Acronyms

AQI Air Quality Index
AQS Air Quality System

ARM Approved Regional Method

BAM Beta Attenuation M onitor
CARB California Air Resources Board
CAAA Clean Air Act Amendments
CBSA Core Based Statistical Area
CFR Code of Federal Regulations
CO Carbon Monoxide
CSN Chemical Speciation Network
EDAS Ethernet Data Acquisition System

EPA U nited S tates Environmental Protection Agency

FEM Federal Equivalent Method

FRM Federal Reference Method Hwy Highway
NAAQS N ational Ambient Air Quality Standards
NAMS National Air Monitoring Stations
NCore National Core Air Monitoring Sites
MSA Metropolitan Statistical Area

NEI National Emissions Inventory
NO Nitr ic Oxide
NO 2 

### Nitrogen Dioxide
NOx Nitrogen Oxides NOy Reactive Nitrogen Compounds
O 3 

### Ozone
PAMS Photochemical Assessment Monitoring S tation s Pb Lead

PM Particulate Matter

PM 2.5 

### Particulates less than or equal to 2.5 microns in size

PM 10 

### Particulates less than or equal to 10 microns in size
POC Pa rameter Occurrence Code
PQAO Primary Quality Assurance Organization
PSD Prevention of Significant Deterioration

PWEI Population

- Weighted Emission Index
SASS Speciation Air Sampling System
SIP State Implementation Plan
SJVAPCD San Joaquin Valley Air Pollution Control District
SLAMS State and Local Air Monitoring Stations

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## Glossary of Acronyms (cont’d )

SO 2 

### Sulfur Dioxide
SR State Route
STN Speciation Trends Network

TAD Technical Assistance Document
TNMOC Total Non

- Methane Organic Compounds
VCAPC D Ventura County Air Pollution Control District
VOC Volatile Organic Compounds

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1 VENTURA COUNTY APCD MONITORING DIVISION 

## 1 Introduction

The Ventura County Air Pollution Control District’s (VCAPCD) 201 3 Ambient Air Monitoring

Network Plan is an examination and evaluation of the VCAPCD ’s network o f ambient air pollution monitoring stations. This annual review of the VCAPCD’s State and Local Air Monitoring Station s (SLAMS ) air monitoring network is required by Title 40, Code of Federal Regulations, Part 58.10 (40 CFR 58.10 )

. The report meets the r equirements for an annual network plan as listed in 40 CFR 58.10

, Appendix A.

As required by the regulations, this report includes monitors which are federal reference methods (FRM) or federal equivalent methods (FEM). While the CFR also requires reportin g of approved regional methods (ARM), no ARMs are in operation within VCAPCD at this time. The terms FRM, FEM, and ARM denote monitoring instruments that produce
measurements of the ambient pollution levels that the regulations allow to be compared to

the National Ambient Air Quality Standards (NAAQS) for regulatory purposes

.

Federal r egulations require specific detailed monitoring network information be included in the annual network plans. A summary of the requirements , and how the VCAPCD has met
each of the requirements

, can be found in Appendix A. The 2013 Ambient Air Quality Monitoring Network Plan includes a rev iew of actions taken since preparation of the last plan (July 2012), and plans for action in the year ahead

.

This report will be available fo r a 30 day public inspection period . Any comments received during the public inspection period will be forwarded to the United States E nvironmental

P rotection A gency (EPA) concurrently with submittal of the plan

. This report ma y be viewed
on the VCAPCD’s web site, www.vcapcd.org and h ardcopies are available for review at
VCAPCD’s office. Written comments should be submitted to Kent Field, Monitoring Division Manager

, at kent@vcapcd. org
, 805

- 662

- 6960

.

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2 VENTURA COUNTY APCD MONITORING DIVISION 

## 2 Overview of Network Operation

The VCAPCD operates five air monitoring station s and one atmospheric profiler within Ventura County. The VCAPCD’s SLAMS monitoring network has been designed to provide

ozone (O 3 

### )

, fine particulate matter of a size of 2.5 micro ns or less (PM 2.5 

### ) and particulate

ma tter of a size of 10 microns or less (PM 10 

### ) monitoring coverage to the majority of the inhabited regions of Ventura County . The VCAPCD has conducted air monitoring for ozon e or oxidants in the co unty since 1963. This monitoring network plays a critical role in assessing clean air progress and in determining pollutant exposures throughout Ventura County

.

2.1 Ambient Air Monitoring Network in Ventura County

Ventura County is located along the southern p ortion of the central California coast between Santa Barbara and Los Angeles Counties. Its diverse topography is characterized by mountain ranges to the north, two major river valleys (the Santa Clara, which trends east

west, and the Ventura, which trends roughly north

- south), and the Oxnard Plain to the south and west. As pollutants are carried into the inland valleys by prevailing winds, they are frequently trapped against the mountain slopes by a temperature inversion layer, generally occurring between 1500 and 2500 feet above sea level. Above the temperature inversion layer, pollutants are allowed to disperse freely. Our air monitoring stations are therefore found between the coast and the inland valley mountain foothills up to approximately 1000
feet.

The purposes of the VCAPCD’s air monitoring network are: 1) to determine Ventura County’s attainment status for the National and California standards for ozone, PM 2.5 

### and

PM 10 

### ; 2) to track Ventur a County’s air quality trends; 3) to provide information to the public about the quality of Ventura County’s air (i.e., reporting of the Air Quality Index (AQI) and

ozone and particulate episode forecasting); and, 4) for data in air quality modeling efforts.

Ambient concentration data are collected for a wide varie ty of pollutants. The most important of these in Ventura County are ozone
, PM 2.5 

### , and PM 10



### . Other pollutants measured include oxides of nitrogen (NOx )

, nitric oxide ( NO ), nitrogen dioxide ( NO 2 

### ), t otal

non

- methane organic compounds (T NMOC ), s peciated PM 2. 5 

### , t oxics ( h exavalent c hromium

, total metals and aldehydes)

, volatile organic compounds ( VOC ), and c arbonyls.

Measurement of meteorological parameters is also conducted at all monitoring stations. Data for all of the pollutants is used to better understa nd the nature of the ambient air quality

in Ventura County, as well as to inform the public about the quality of the air.

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3 VENTURA COUNTY APCD MONITORING DIVISION 

### Not all pollutants are monitored at all station s. Most station s monitor for multiple pollutants,

while some station s monitor only two pollutants. A particular station ’s location and monitoring purpose determine the actual pollutants measured at that station

.

The majority of the population 1 

### resides in the southern half of Ventura County

- the VCAPCD has focused its air monitoring efforts there. The south half of Ventura County is

divided into five air monitoring regions : Ventura and the Oxnard Coastal Plain, Ojai Valley,
Santa Clara River Valley , Simi Valley , and the Conejo Valley. T he air monitoring network has been designed to provid e air monitoring coverage to those regions of Ventura County

.

Table 1 lists the pollutants mea sured in 201 3 at each monitoring station, and the assigned Air Quality System identification (AQS ID ) number for each monitoring station

.

Table 1

– Air Monitoring Stations a nd Pollutants Monitored in 201 3

Station Name AQS ID Ozone NO 2 (area - wide)

PM 2.5 FRM

PM 2.5 F E M

PM 2.5 non - FEM

PM 2.5 Speciation

PM 10 FRM

PM 10 FEM Meteorology

Other
Parameters

El Rio

– Rio Mesa Schoo l #2
061113001 

### 

 

    

 

### 

 VOC 

### 
Carbonyls 

### 

Toxics 

### *** Ojai

– Ojai Avenue
061111004 

### 

  

Piru

– Pacific Avenue
061110009 

### 

  

Simi Valley

– Cochran St reet

061112002 

### 

 

   * 

###  ** 

###   VOC 

### 

TNMOC 

### 

 Toxics 

### *** Simi Valley Upper Air
061110 008 

###  Profiler 

### 

Thousand Oaks

– Moorpark Rd
061110007 

### 

   

* SASS and URG s amplers, monitored as part of Speciation Trends Network (STN) , Chemical Speciation Network (CSN)

.



### ** Main and Collocated Samplers



### *** California Air Resources Boa rd 

###  Monitored as part of SLAMS network. 

###  Monitored as part of Photochemica l Assessment Monitoring Station s 

### ( PAMS ) network.


###  Monitored as part of SLAMS and PAMS networks.



### Figure 1 shows Ventura County’s air monitoring regions and the locations of the mo nitoring

stations.

1 All population estimates in this document are based on the 2010 US census.

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

4 VENTURA COUNTY APCD MONITORING DIVISION 

### Figure 1

– VCAPCD Monitoring Regions a nd Ambient Monitoring Stations

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

5 VENTURA COUNTY APCD MONITORING DIVISION 

### A description of each of the five monitoring regions is presented below.

Ventura and the Oxnard Coastal Plain

– a broad coastal area stretc hing from the Pacific Ocean to several inland valleys, covering 405 square miles

, and having a population of
433,245 people. This area encompasses the cities of Port Hueneme

, Ventura

, Oxnard and
Camarillo. The Oxnard p lain area is a relatively flat plain area with foothills and mountains at

i ts northern border. This area is home to considerable agricultural activities and include s a deepwater port and a number of Ventura County’s major stationary sources 2 

### , including two natural gas

- fired electric gener at ing units, two naval bases, several natural gas

- fired cogeneration facilities , several oil and gas production and processing facilities, a nd a paper products manufacturer. The area is impacted by mobile sources and marine shipping operations occurring off Ventura County’s coast. This area is served by the VCAPCD’s monitoring station at Rio Mesa High School, Central Avenue, in Oxnard.

Ojai Valley

– an inland area including the City of Ojai and the communities of Oak View, and Meiners Oaks, cover ing 102 sq u are miles

, and having a population of 27, 7 84 people. The Ojai Valley is surrounded by mountain ranges. There is one major stationary source on the southeastern edge of the region; however, the Ojai Valley may be influenced by oil production activities oc curring to the south, in the Ventura Coastal area. The area is impacted primarily by mobile sources. The Ojai Valley is served by the VCAPCD’s monitoring station at Ventura County fire station, Ojai Avenue, in Ojai.

Santa Clara River Valley

– an inland a rea, covering 204 square miles

, and having a population of 45,107 people. The Valley is surrounded by foothills and low

- lying mountains. The eastern edge of the Santa Clara River Valley is the border between Ventura and Los Angeles Counties. The area is also home to considerable agricultural activities. There are oil production and processing activities occurring throughout the Santa Clara River Valley. There are two major stationary sources in its boundaries. The area is impacted primarily by

mobile sources. This area is served by the VCAPCD’s monitoring station on Pacific Avenue, in Piru.

Simi Valley

– an inland area, including the cities of Simi Valley and Moorpark, covering 142 square miles , and having a population of 162,683 people. Simi V alley i s surrounded by

foothills and low

- lying mountains. The eastern edge of the Simi Valley is the border between Ventura and Los Angeles Counties. There are two major stationary sources in its boundaries. The area is impacted primarily by mobile sources. Th is area is served by the
VCAPCD ’s monitoring station at Simi Valley High School , on Cochran Street, in Simi Valley.

2 For the purpose of this report a major stationary source is considered to be a facility that has been issued a federal Part 70 operat ing permit (also referred to as a Title V permit).

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### Conejo Valley

– an inland area, includ ing the c ity of Thousand Oaks and the communities of Westlake Village and Newbury Park, covering 75 sq uare miles

, and having a population of
153,680 people. The area is surrounded by foothills and low

- lying mountains. The eastern edge of the Conejo Valley is the border between Ventura and Los Angeles Counties. There are no major stationary sources in its boundaries. The area is impacted primarily by mobile sources. This area is served by the VCAPCD’s monitoring station at Thousand Oaks High School, Moorpark Road, in Thousand Oaks.

2.2 Monitoring Objectives a nd Spatial Scales

F ederal regulations (40 CFR 58, Appendix D)

, require that a SLAMS network be designed to meet three monitoring objectives:

1. To provide air pollution data to the public in a timely manner ;
2. To support compliance with the NAAQS; and

, 3. To support air quality research

.

In support of the monit oring objectives above, the monitoring network must be designed with a variety of site types. Sites can be designed :

1. To determine the highest concentration expected to occur in the area covered by the network;

2. To determine typical concentrations in areas of high population density;

3. To determine the impact on ambient pollution levels of significant sources or source categories;

4. To determine general background concentration levels;

5. To determine the extent of regional pollutant transport among populated areas , and in support of secondary standards; and,

6. To determine the welfare

- related impacts in more rural and remote areas (such as visibility impairment and effects on vegetation).

The physical siting of an air monitoring station must achieve a spatial scale o f representativeness that is consistent with the site type of the monitor. The spatial scale results from the physical location of the station with respect to the pollutant sources. It estimates the size of the area surrounding the monitoring station tha t experiences uniform pollutant concentrations

.

The categories of spatial scale are:

1. Microscale

– An area of uniform pollutant concentrations ranging from several meters up to 100 meters.

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7 VENTURA COUNTY APCD MONITORING DIVISION 

### 2. Middle Scale

– Uniform pollutant concentrations in an area of about 100 meters to
0.5 kilometer.

3. Neighborhood Scale

– An area with dimensions in the 0.5 to 4.0 kilometer range.

4. Urban Scale

- Citywide pollutant conditions with dimensions ranging from 4 to 50

kilometers.

5. Regional Scale

– A large area, usually rural, of the same general geography and without large sources that extends from tens to hundreds of kilometers.

Table 2 shows the relationship between site types and the spatial scales that are generally appropriate to those site types.

Table 2

– Site Types a nd Appropriate Spatial Scales

Site Type Appropriate Spatial Scale Highest Concentration Micro, Middle, Neighborhood Population Oriented Neighborhood, Urban Source Impact Micro, Middle

, Neighborhood

General/ Backg round & regional transport Urban, Regional

Welfare

- r elated Urban, Regional



### Table 3 shows each of the VCAPCD ’s air monit oring stations and its criteria pollutant objective and spatial scales. Appendix B present s detailed site information about each of the monitoring stations in Ventura County

Table 3

– Pollutants, Monitoring Objectives a nd Spatial Scales

Pollutant Monitoring Station Monitoring Objectives and Spatial Scale
NAAQS Compari son Public

Information Research Spatial Scale

Ozone El Rio 

###  Urban

Ojai 

###  Urban

Piru 

###  Urban

Simi Valley 

###  Urban

Thousand Oaks 

###  Urban

NO 2 El Rio 

###  Urban

Simi Valley 

###  Urban

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8 VENTURA COUNTY APCD MONITORING DIVISION 

### Table 3

– Pollutants, Monitoring Objectives and Spatial Scales (cont’d)

Pollutant Monitoring Station Monitoring Objectives and Spatial Scale

NAAQS Comparison Public

Information Research Spatial Scale

PM 2.5 El Rio 

###  Neighborhood

Ojai 

###  Neighborhood

Piru 

###  Neighborhood

Simi Valley 

###   Neighborhood

Thousand Oaks 

###  Neighborhood

PM 10 El Rio 

###  Neighborhood

Simi Valley 

###  Neighborhood

VOCs El Rio 

###  Neighborhood

Simi Valley 

###  Urban

T NMOC Simi Valley 

###  Urban

Carbonyls El Rio 

###  Urban

PM 2.5 Spec iation Simi Valley 

###  NA *

Toxics El Rio 

###  NA

Simi Valley 

###  NA

* Not Applicable



### 2.3 Local Monitoring Objectives and Local Spatial Scales

Each of the VCAPCD’s air monitoring stations has , at a minimum, an ozone monitor.

Monitors at some stations include PM 2.5 

### FRM monitors, continuous PM 2.5 

### FEM or non-FEM monitors, PM 10 

### FRM monitors, continuous PM 10 

### FEM monitors, continuous TNMOC, and oxides of nitrogen (NO, NO X 

### , NO 2 

### ). The VCAPCD has located each of its air monitoring stations in relation to specific geographic areas of Ventura County (Section 2.1 ), depending upon each area’s population, topography and meteorology. The north half of Ventura County is mountainous and sparsely populated, covering nearly 900 square miles, and having a population of only 819 people (population density of less than 1 person/square

mi le)

, so no air monitoring stations are located in that area. Because the VCAPCD has designed its network with consideration given to the distinct geographic, topographic and meteorological areas of Ventura County, the areas and population served by VCAPCD ’s air monitoring stations vary greatly. The local monitoring objective for VCAPCD’s monitoring stations is reporting the Air Quality Index (AQI) and for ozone episode forecasting. The local spatial scale for VCAPCD’s monitoring stations is urban or neighborhood as previously

described.

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9 VENTURA COUNTY APCD MONITORING DIVISION 

### Table 4 contains the local regions in Ventura County and the population served by each of

its air monitor ing stations.

Table 4

– Local Air Monitoring Regions

- Area and Population Served

Station Name and Region Served AQS ID Area Served ( Sq. Mi. ) Population

Served Population

Density (Pop./Sq. Mi)

El Rio

– Rio Mesa School #2 Region : Ventura and the
Oxnard Coastal Plain 061113001 405 433,245 1070

Ojai

– Ojai Avenue Region: Ojai Valley 061111004 102 27,784 272

Piru

– Pacific Avenue Region: Santa Clara River Valley 061110009 204 45,107 221

Simi Valley

– Cochran Street Region: Simi Valley 061112002 142 162,683 1146

Thousand Oaks

– Moorpark

Road Region: Conejo Valley 061110007 75 153

, 680 2049



### Appendix C of this document describes the minimum monitoring requirements for air monitoring networks in Ventura County. These requirem ents are specified in 40 CFR 58.10, Appendix D. A ppendix C also presents documentation for pollutants for which no monitoring is required in Ventura County.

2.3.1 Ozone Monitoring Network

Ventura County is a serious nonattainment area for the federal 8

- hour ozo ne standard . The
VCAPCD monitors for ozone hourly at all of its air monitoring stations (El Rio, Ojai, Piru, Simi Valley, and Thousand Oaks), except the Simi Valley Upper Air station

. The NAAQS for

ozone is based on the 4 th 

### highest annual 8

- hour maximum average in parts per million (ppm) (level: .075). Appendix D presents the NAAQS as of 2012. The level of the NAAQS has been exceeded at various monitoring station s in Ventura County. The ozone NAAQS is exceeded most frequently at Simi Valley, followed by Oja i and Piru. The El Rio monit o r ing

station infrequently exceed s the ozone NAAQS

. The maximum ozone concentration for

2012 was at .087 ppm, recorded at the Simi Valley monitoring station

.

2.3.2 PM 2.5 

### and PM 10 

### Monitoring Network

The VCAPCD’s particulate mon itoring network consists of monitors for PM 2.5 

### and PM 10



### . Ventura County is in attainment of the federal PM 2.5 

### and PM 10 

### NAAQS. The PM 2.5 

### network

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10 VENTURA COUNTY APCD MONITORING DIVISION 

### has been operating since 1999, in response to establishment of the federal PM 2.5 

### standard
in 1999. VCAPCD has had PM 10 

### monitors operating since late 1986 in Ventura County.

The PM 2.5 

### monitor ing network include s t hree PM 2.5 

### FRM monitors (El Rio, Simi Valley, and Thousand Oaks)

. It also includes four continuous PM 2.5 

### FEM monitors (El Rio, Ojai, Piru,

and Thousand Oaks) ; and one continuous PM 2.5 

### non

- FEM monitor (Simi Valley) , that all

monitor PM 2.5 

### hourly

. The annual PM 2.5 

### NAAQS is based on the annual weighted mean of

the 24

- hour averages, in μg/m 3 

### (level: 15). The 24

- hour NAAQS for PM 2.5 

### is based on the 98th perc entile 24

- hour average, in μg/m 3 

### (level: 35).

The PM 10 

### monitor ing network include s three PM 10 

### FRM monitors (El Rio

, and Simi Valley (primary and collocated)), and two PM 10 

### FE M monitors (El Rio and Simi Valley). The 24

- hour NAAQS for PM 10 

### is set at a leve l n ot to be exceeded more than once per year

, on
average
, over 3 years , in μg/m 3 

### (level: 150 ).

Appendix E presents documentation of monitor collocation requirements as specified in 40
CFR 58 Appendix A, Section 3. Appendix E also presents documentation f or pollutants for which there are no collocation requirements in Ventura County.

There are no PM 2.5 

### or PM 10 

### monitors required for SIP or maintenance planning.

2.3.3 Speciation Trends Network (STN) , Chemical Speciation Network (CSN)

Under the STN , a part of the C SN

, VCAPCD operates a speciation monitor at the Simi Valley air monitoring station. Samples collected from the speciation sampler s are analyzed by an EPA contractor. The samplers , a Speciation Air Sampling System (SASS) and URG carbon sampler , are mainta ined by VCAPCD for EPA. The Met One SASS sampler has been operational since 12/01/2001, and the URG 3000 N sampler since 03/01/2009

.

VCAPCD has responsibility to receive the SASS and URG filters, maintain and operate the samplers

, and return the exposed filters to the EPA contractor for analysis

. The SASS filter module and URG filter cassette are sent to VCAPCD to be run and then returned on a tight (1

- in

- 3 day, alternate) schedule to an EPA contractor for analysis. Although we are fulfilling

our respon sibilities described above, VC APCD has had difficulty meeting the receiving, run, and pickup schedules set by the EPA in the alternate 1

- in

- 3 d ay s ampling schedule . Our

discussion of these i ssues with EPA Region 9 reveals this to be a common problem. EPA Region 9, the EPA’s contractor, and VCAPCD will be refining these sampling procedures

and schedules.

O ther aspects of the CSN, such as independent field auditing, are the responsibility of agencies other than the VCAPCD

. The California Air Resources Bo ard ( CARB ) and EPA

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11 VENTURA COUNTY APCD MONITORING DIVISION 

### are currently exploring assignment of the role of Primary Quality Assurance Organization ( PQAO ) for the CSN monitoring program

. To our knowledge, this issue has not been

resolved. Currently, no outside auditing is being conducted for t his program, and no audits have been completed since at least 2008.

2.3.4 P hotochemical Assessment Monitoring Stations (P AMS )

Section 182(c)(1) of the 1990 Clean Air Act Amendments (CAAA) required the EPA Administrator to promulgate rules for the enhanced monito ring of ozone, NOx , and VOC to obtain more comprehensive and representative data on ozone air pollution. Immediately following the promulgation of such rules, the affected States were to commence such actions as were necessary to adopt and implement a prog ram to improve ambient monitoring activities and the monitoring of emissions of NOx and VOC.

Each State Implementation Plan (SIP) for the affected areas must contain measures to implement the ambient monitoring of such air pollutants. The 40 CFR 58 requir ed States to

establish PAMS as part of their SIP monitoring networks in ozone nonattainment areas classified as serious, severe, or extreme. The principal reasons for requiring the collection of additional ambient air pollutant and meteorological data are the number of ozone

nonattainment areas nationwide, and the need for a more comprehensive air quality database for ozone and its precursors. The chief objective of the enhanced ozone monitoring revisions is to provide an air quality database that will as sist air pollution control agencies in evaluating, tracking the progress of, and, if necessary, refining control strategies for attaining the ozone NAAQS.

2.3.5 California Air Resources Board Toxic Air Contaminant Sampling

VCAPCD collects toxic samples (me tals, h exavalent c hromium , and a ldehydes) at our Simi Valley air monitoring site . Our Simi Valley air monitoring site, one of 20 statewide sites, is part of the CARB Toxics Monitoring Network within major urban areas to provide data to determine the average an nual concentrations of toxic air contaminants as input to the identification process, and to assess the effectiveness of controls.

Additional ly, VCAPCD is part of the CARB t oxics monitoring program for pesticides. CARB monitors pesticides at our El Rio a ir monitoring site.

2.4 Air Quality Data

VCAPCD’s air monitoring stations report data to the EPA’s Air Quality System ( AQS ) database. The data generated at these stations are public information and are available in various formats from the respective agencies. Table 5 lists some sources for air quality data.

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12 VENTURA COUNTY APCD MONITORING DIVISION



### Table 5

– Sources o f Ambient Air Quality Data

Agency Address For Data Requests Internet Address Data Available Ventura County
APCD 669 County Square Drive

Ventura, CA 93003 http://www.vcapcd.org/ Ventura County

California Air

Resources Board PO Box 2815

Sacramento, CA 95812 http://www.arb.ca.gov/html/ds.

htm Califor nia Air Monitoring Data

United States

Environmental Protection Agency Ariel Rios Building

1200 Pennsylvia Avenue, N.W. Washington, DC 20460 http://www.epa.gov/airdata/ National Air Monitoring Data



### Real time a ir quality and meteorological data is available on CARB’s Air Quality and Meteorological Information System at http://www.arb.ca.gov/aqmis2/aqmis2.php

.

Federal regulations require that air monitoring organizations submit precision and accuracy data for the data reported to AQS. VCAPCD air monitoring precision data are submitted to the EPA AQS database on a quarterly basis and are up to date as of the publication of this report. Accuracy data are repo rted to the EPA by CARB.

Federal regulations require the air monitoring organizations to annually submit a letter certifying that ambient data and quality assurance data are completely submitted to AQS

and that the ambient data are accurate to the best of our knowledge taking into consideration the quality assurance findings. VCAPCD’s 2012 annual data certification was

submitted to EPA on 05/01/2013

. A copy of this letter is provided in Appendix F.

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13 VENTURA COUNTY APCD MONITORING DIVISION 

## 3 Recent a nd Pending Modifications t o t he Air Monitoring Ne twork

40 CFR 58.14(b) requires that the EPA review and approve modifications to a SLAMS monitoring network, and requires the responsible state or local agency to inform the EPA of any proposed modifications. This provides an opportunity for review and comm ent on the possible regulatory consequences of such action. Furthermore, the VCAPCD generally would conduct a period of parallel sampling of monitors or if a station is moved, at the

current station and the proposed station for a term of several months to one year, depending upon the pollutant, the NAAQS that is of most concern, and on other factors.

3.1 Network Operations

- July 2012 to June 2013

This section describes the changes made to VCAPCD’s monitoring network since the publication of the 2012 Ambient A ir Monitoring Network Plan , and through June 2013

.

3.1.1 Network Operations with No Recent Changes

No changes were made to the ozone , particulate, speciation trends, or PAMS monitoring

network s during this network plan reporting period

.

3.1.2 Recent Changes to the PM 2.5 

### and PM 10 

### Monitoring Networks

On November 22, 2011

, VCAPCD wrote a request to EPA (“Request for Approval of Modifications to Particulate Monitoring Networks ”, see Appendix F ). The primar y focus of the request was to transition from collecting particula te data via filter media to a continuous particulate sampling at all of our air monitoring sites.

FRM filter sampling is an aged method of estimating the concentration of sized particulates

in the air. The FRM particulate filter sampling method is a 24 hour sample that requires an additional 7 to 14 days for processing and computation of the particulate data for that 24 hour sample. Additionally, FRM data is collected on a 1

- in

- 3 or 1

- in

- 6 day interval. So, FRM particulate data is not available for eve ry day.

On O ctober 17, 2006, EPA published r evisions to ambient air monitoring regulations that included new performance criteria for acceptance of continuous PM 2.5 

### monitors as Class III

FEMs

. PM 2.5 

### Class III FEMs are analyzers capable of providing ambi ent air measurements representative of one

- hour or shorter period integrated PM 2.5 

### concentrations as well as 24

- hour measurements determined as, or equivalent to, the mean of 24 consecutive one

- hour

measurements. Th ese FEM particulate samplers run continu ous ly and report their data hourly

. The FEM continuous particulate samplers provide real

- time (hourly) data for an

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14 VENTURA COUNTY APCD MONITORING DIVISION 

### immediate response to air quality issues.

FEM data readily fulfills the VCAPCD mission statement “ To protect public health and agriculture from the adverse effects of air pollution by identifying air pollution problems and developing a comprehensive program to achieve and maintain state and federal air quality

standards. ” A response time of 7 to 14 days for FRM data is unacceptable for fulf illing our mission statement to responsively monitor the air quality for the concern of the public’s

health.

VCAPCD proposes to progress to FEM hourly particulate sampling throughout its network. But we must do this cautiously with data analysis results to back

- up and document our decision. VCAPCD is currently running a comparison of FRM to FEM data for both PM 2.5 

### and PM 10 

### fo r the calendar year 2013

. PM 2.5 

### FRM to PM 2.5 

### FEM will be compared at the El Rio, Thousand Oaks, and Simi Valley stations. PM 10 

### F RM to PM 10 

### FEM will be compared at

the El Rio and Simi Valley stations . We originally wanted to run this FRM to FEM comparison study in 2012, but sampler supply issues with the manufacturer delayed installation, and hence

, a delay in the study by one year to 2013.

Preliminary results of the comparison are quite good and match data shown in other comparisons by other agencies, specifically

, and most recently

, the April 7, 2011 EPA memo by Tim Hanley and Adam Reff, OAQPS titled “ To assess the quality of re cently approved

PM 2.5 

### continuous Federal Equivalent Method (FEM) data as operated in routine monitoring

networks. ”

EPA responded to our request for modifications to our particulate sampling network on February 11, 2012 (see Appendix F ). EP A stated they ap proved of the “f inal PM 2.5 

### network as outlined in the letter, if the study shows good agreement between the FRMs and FEMs.” In January and February 2014

, we will run the comparisons and see if the results show good agreement. We will present the results with conclusions to EPA Region 9 and CARB. If the agreement between FRM and FEM is good, we will request to discontinue FRM operations. As noted in the conclusions of Hanley and Neff’s memo, if the results are not good, we will keep the PM 2.5 

### FRM as the primary monitor while working towards improvements in FEM data quality.

3.1.3 Recent Changes to the Data Acquisition and Management System

Situations beyond our control hampered our ability to be productive and move forward with the change

- over from our current data management system , ethernet data acquisition system (EDAS) to the new system (AirVision). EDAS is an old system and no longer supported by the manufacturer. EDAS has been in hourly use since 1997. Technology is advancing with data management system s and the data they acquire from the air quality

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15 VENTURA COUNTY APCD MONITORING DIVISION 

### data analyzers at our air monitoring sites. Our goal is to use these advancements in technologies by having our Air Quality Technicians go into the field less often, and be able to work on the air quality a nalyzer in the field remotely from the VCAPCD office. This will improve staff productivity and reduce vehicle maintenance costs. VCAPCD has begun preparation and planning for the transition to AirVision. We anticipate having the transition

to AirVision completed and the new system operational before the end of 2013.

3.1.4 Recent Changes to Laborato ry Filter Processing Operations

In December 1998, we established a monitoring lab with an atmosphere

- controlled filter room for processing our PM 2.5 

### filters . In add ition to our filters, we agreed to assist other air
districts around the State by process ing their PM 2.5 

### filters. In early 2013, we had two contracts for processing particulate samples

- with the San Joaquin Valley Air Pollution Control District (SJVAPCD) and CARB.

The processing of PM 2.5 

### filters requires controlled atmospheric conditions for pre

- and post

weighing. Even though our air conditioning unit is regularly maintained, it had been showing signs of age, and was having a very difficult time keep ing the weighing room within operation specifications. In May 2013

, the air conditioning unit appeared as if failure was imminent

, and we could not guarantee the timely processing of PM 2.5 

### filters for our clients.

The r eplac ement cost for the air condit ioning unit is approximately $43,000

. PM 2.5 

### processin g needs are being drastically reduc ed with the use of PM 2.5 

### continuous samplers

. Because of these issues, we reassessed whether a large financial expenditure for particulate sampling technology that is being phased out was a responsible use of funds.

We decided it was not.

VCAPCD notified EPA, CARB, and SJVAPCD that we would not be able to process any

more client PM 2.5 

### filters. We completed processing the PM 2.5 

### filters that we had received. CARB agre ed to short term processing of PM 2.5 

### filters until another lab could be found to process the filters. We sent filters and supplies to CARB to enable them to process filters,

and CARB filter processing lab personnel work ed extra shifts to respond to this i mmediate need. VCAPCD is very appreciative of the cooperation given to us, on such short notice, by CARB, SJVAPCD, and EPA Region 9 in addressing this issue

.

VCAPCD continues to process PM 2.5 

### filters from VCAPCD monitoring sites.

3.1.5 Replacement of Analyzer s and Equipment Since Last Reporting Period

In the interest of keeping up with technology and a desire to be proactive, we have an analyzer replacement schedule set up for the different analyzers, samplers, and calibration

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16 VENTURA COUNTY APCD MONITORING DIVISION 

### equipment. Experience has shown that repairing aging and ailing analyzers reaches a point where it is no longer productive and

, ultimately , is more costly than replacing the equipment. Our proactive analyzer replacement schedule minimizes data loss, providing VCAPCD and the public with timely air quality data.

Ozone analyzers, FEM s, and calibration devices will be considered for replacement every 5 years. NOx/NO/NO 2 

### analyzers and data loggers will be considered for replacement every 8 years. Meteorological equipment will be considere d for replacement every 7 to 15 years. Uniformity of e quipment throughout our network allows us to have a small stock of replacement parts that have an expected failure rate. These parts of our air monitoring network will be replaced as they fail. T he e quipment that fails will be replaced quickly due to a stock of replacement parts sufficient to meet a 6 month equipment failure projection.

Table 6 summarizes the analyzer and equipment replacement that has taken place at
VCAPCD a ir monitoring sites since preparation of the 2012 Ambient Air Monitoring Network

Plan

.

Table 6

– Analyzer and Equipment Replacement

– July 2012 to June 2013

Date(s) Equipment Event Notes

11/2012

– 01/2013 Flow calibration devices Pu rchase d E nables calibrat ion of PM 2.5 FEM and PM 10 FEM continuous particulate samplers, and SASS sampler ( operate d for CARB )

01/2012 Trace NO y analyzer to

continuous NO 2 analyzer Conver ted Converted from an unusable monitor from a

discontinued program. On e

- fifth the cost of a new analyzer, saving VCAPCD $11,000

.

01/2013

– 05/2013 Site computers

–

all sites Purchase d Last replaced in 2006. Used to communicate, via the internet, between the VCAPCD office and site datalogger. These computers also allow us to communicate with the air quality analyzers and calibrators at the air monitoring sites.

01/2013

– 04/2013 Wind sensors Purchased Replace RM Young Aerovane wind sensors with Climatronic wind sensors at El Rio and Simi Upper Air sites. All sites now eq uipped with Climatronic.

01/2013

– 04/2013 Temperature/humidity

sensors Purchased Replaced all sites with Met One equipment. Temperature sensor life: 10

- 20 years, Hunidity sensor life: 5

– 10 years

05/2013 Calibrator for our

gaseous air quality

anal yzers Purchase d Replace an ailing / aged calibrator at the El Rio site.

“ Ozone analyzer Ordered Old ozone analyzer will be used for parts for existing ozone analyzers

.

“ NO 2 /NOx/NO analyze r Ordered Replace aged analyzer at the El Rio site.

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### Table 6

– Analyzer and Equipment Replacement

– July 2012 to June 2013 (cont’d)

Date(s) Equipment Event Notes

05/2013 PM 2.5 FEM continuous

particulate sampler Ordered Replace a very aged (2002) PM 2.5 B eta A ttenuation

M onitor (BA M) at the Simi Valley site

.

“ FEM sampler probe

inlets

- raised Completed In response to the early May 2013 CARB audits ; to remove any question of roof safety railing interference or adjacent building proximity that may
affect air flow to the probe inle t



### . Fall 2013 ( E stimated completion date) Air inlet sampling lines Purchase d Associated with the replacement of gaseous air quality analyzers and cali brators; replaced due to deterioration and the requirement of higher flow rates of the new equipment



### 3.2 Net work Operations

– Post June 2013

This section describes proposed future changes for VCAPCD’s monitoring network.

3.2.1 Network Operations w ith No Proposed Changes

N o changes are proposed for the o zone or the meteorological network during the remainder
of this ne twork plan reporting period

.

3.2.2 Future Changes t o t he PM 2.5 

### and PM 10 

### Monitoring Network

In summer or fall of 2013, the PM 2.5 

### non

- FEM sampler will be replaced with a PM 2.5 

### FEM sampler.

No additional changes are proposed for the PM 2.5 

### or PM 10 

### M onitoring N etwork s at this time.

As noted in Section 3.1.2

, Recent Changes to the PM 2.5 

### and PM 10 

### Monitoring Networks

, should FRM and FEM show good agreement following review of 2013 data, in Spring 2014

, we will reque st to discontinue FRM operations. If agreement is not good

, we will keep the

FRM s as the p rimary monitors while working towards improvements in FEM data quality.

3.2.3 Future Changes to the Speciation Trends Network

The CSN was originally established in the ear ly 1990’s to help determine the source of PM 2.5 

### particles on days that exceed ed the standard for those sites. Historically, many of the CSN

sites were located at PAMS monitoring sites.

With the future of the PAMS program in Ventura County uncertain due to EPA PAMS

re

- engineering efforts, VCAPCD anticipates evaluating the justification for continuing the CSN at the Simi Valley monitoring site in a future annual network plan, once the PAMS

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18 VENTURA COUNTY APCD MONITORING DIVISION 

### re

- engineering program details are finalized.

3.2.4 Future Changes

- New NO 2 

### Near

- Road Monitoring Station

On February 9, 2010, EPA promulgated new m inimum m onitoring requirements for the NO 2 

### Monitoring Network in support of a newly revised 1

- hour NO 2 

### NAAQS and the retained
annual NAAQS. In the new monitoring requirements, state and local air monitoring agencies are required to install Near

- Road NO 2 

### monitoring stations at locations where peak hourly NO 2 

### concentrations are expected to occur within the Near

- Road environment in larger urban areas. State and local air agencies are re quired to consider traffic volumes, fleet mix, roadway design, traffic conges tion patterns, local terrain or topography, and meteorology in determining where a required Near

- Road NO 2 

### monitor should be placed. In 40 CFR Part 58 Appendix D, the EPA requires state and local air agencies to operate one

Near

- Road NO 2 

### monitor in any core

- based statistical area ( CBSA ) with a population of 500,000 o r m o re persons.

For site location requirements

, 40 CFR Part 58

, Appendix E states : “As near as practicable

to the out side nearest edge of the traffic lanes of the target road segment; but shall not be located at a distance greater than 50 meters, in the horizontal, from the outside nearest edge of the traffic lanes of the target road segment.” In their Technical Assistan ce Document (TAD) for help with siting, EPA recommends that the target distance for n ear

‐ road NO 2 

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

Preliminary results of traffic data indicate that the area with the highest traffic counts is the U.S. Highway (Hwy) 101 Freeway

, east of the Hwy 101 and State Route (SR) 23 interchange. Our preliminary review of the meteorology of the area, and the other factors for considering site selection and location in the TAD ( Near

- Road NO

2 

### Monitorin g Technical

Assistance Document

, EPA

- 454/B

- 12

- 002

, June 2012 ) indicates that a possib le site location

could be on the dirt median

, on the north side of Hwy 101, at approximately 3600 Duesenberg Drive, Thousand Oaks, California (N 34.161889, W

- 118.830872 ).

In October 2012, EPA proposed a revision to the Near

- Road NO 2 

### monitoring requirement o f site establishment by January 1, 2013. The EPA proposal, Revision to Ambient Nitrogen Dioxide Monitoring Requ irements (proposed revision ), was published in the Federal Register on October 19, 2012 (77 Federal Register 64244). The proposed revision stat e s that a Near

- Road NO 2 

### monitoring site would be required in each CBSA with a population more than 500,000, but less than 1 million, by January 1, 2017. Ventura County has a population of approximat ely 823,318 (as of 2010 census); hence only one Near

- Road NO 2 

### site would be required to be operational by January 1, 2017.

Site acquisition and permission is the first step for the Near

- Road NO 2 

### monitoring site. We

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### will begin discussions for si te location permission with Calt rans, EPA, CARB, and the City of

Tho usand Oaks in 2015. In 2015

, we will also begin the process of hiring an Air Quality Instrument Technician to help assist with the additional workload, and begin the learning curve on air quality instrumentation operation and maintenance. As noted in Table 7

, we are planning on the procurement of equipment and personnel in 2015, provided EPA funding assistance. Equipment would be delivered in early 2016

, and testing would begin in Spring 2016. Once permission for establishment of a site is obtained, we will begin construction of the air monitoring site during the Summer 2016. By Fall 2016

, the site will begin operational testing of equipment and systems. On January 1, 2017

, our Near

- Road NO 2 

### air monitoring
site in Thousand Oak s, California will officially begin collecting and reporting data.

3.2.5 Future Changes t o t he PAMS Network

VCAPCD has three PAMS air quality monitoring sites. El Rio is a site T ype 2 (maximum precursor emission site), Simi Valley is a site Type 3 (maximum ozon e concentration site), and Simi Upper Air is a Type 3 support site for collecting meteorological atmospheric

structure data. The El Rio and Simi Valley sites collect canisters on a 1

- in

- 3 day schedule during July, August, and September, pursuant to the Ca lifornia Alternative Plan III.

In May 2012, VCAPCD staff attended the EPA National Air Quality Conference in Denver,
Colorado. At that conference

, Kevin Cavend e r (EPA) presented “PAMS Re

- Engineering”. As part of that presentation

, EPA propos ed to decreas e the number of PAMS sites from 52 to a future 26. Ventura County was a county listed as not having a PAMS monitoring site in the future. Additionally, an April 28, 2011 email from EPA Region 9 contact, Meredith Kurpius, cautioned us on changing any part of our PAMS monitoring program due to the possibility of the discontinuation of the program in Ventura County, at least until the EPA’s

PAM S re

- engineering is finalized.

Continuous TNMOC monitoring is required at site Types 2 and 3. Our TNMOC analyzers a t
the El Rio and Simi Valley sites failed in 2010. In an effort to monitor ozone precursor s, we installed and made operational the TNMOC analyzer at Simi Valley in April 2012. The El

Rio site TNMOC analyzer has not been installed, because, as stated abov e, our PAMS network is on hold and we are not to make any changes to our existing PAMS network until after the EPA updates PAMS requirements.

In December 2012, at the Simi Valley Type 3 site, our hydrogen generator began to fail, and in January 2013, our hydrocarbon analyzer began to fail. Both pieces of equipment failed in April 2013. The replacement of this equipment would cost VCAPCD approximately $11,0 00, plus staff time, and an on going operational specialty gas usage cost of $400 per month. Due to the continued improvements in air quality and uncertainty of the value/need to identify ozone precursors at the Simi Valley site, VCAPCD questioned large financial

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20 VENTURA COUNTY APCD MONITORING DIVISION 

### expenditures for a project that may be cancelled in the near future, and the value of the d ata for historical correlation to ozone formation. With permission to not replace th e hydrocarbon equipment given via email from EPA

- Region 9 Meredith Kurpius and EPA’s Kevin
Cavende r, VCAPCD chose no t to replace the equipment

, and wait until the EPA’s PA MS re

engineering is finalized . A letter formally requesting discontinuation of collection of continuous hydrocarbon data at the Simi Valley site is included in Appendix F.

The atmospheric profiler in Simi Valley (Simi Upper Air site) had been a very usef ul tool in determining lower atmosphere winds and temperature structure from the surface up to 2 kilometers. The atmospheric profiler became operational in July 1995 and continued operation until November 2010. The atmospheric profiler was designed to la st about 5 years. But with upgrades and staff know

- how, we were able to keep the atmospheric profiler running for many years past its design life. But in November 2 0 10

, we could no longer repair the computer and associated hardware.

In April 2011

, we f ound a company that could rebuild our atmospheric profiler . In May 2012

, that company installed the up graded components, which made the atmospheric profiler operational again. But, the profiler upgrade failed soon after, working for short periods of

time , as the atmospheric profiler upgrade company tried to make the profiler work. But after nearly 9 months of poor performance

, VCAPCD stopped the project in January 2013. The atmospheric profiler failed to work for even a week at a time during those 9 mon ths. We are now (June 2013) in talks with the upgrade company to fix the atmospheric profiler or refund the upgrade costs

.

40 CFR 58 Appendix D, Section 5 specifies the network design for the PAMS program. Federal regulation s require the addition of reac tive nitrogen compounds ( NOy ) monitoring at Type 3 sites (Simi Valley) and trace carbon monoxide ( CO ) monitoring at Type 2 sites (El Rio). We have not installed the instrumentation due to wide spread questioning by Federal and state air agency staff of the rationale of monitoring NOy and trace CO in Southern
California.

Our gas chromatograph and carbonyl sampler are aged and are being kept operational even though they have exceeded their design life. We are keeping them operational, repairing/replacing p arts that fail, until we hear further about the re

- engineering requirements
of PAMS.

3.2.6 Future Changes t o t he Data Acquisition a nd Management System

As described in Section 3.1.3

, Recent Changes to the Data Acquisition and Management System , VCAPCD is beginning the transition from EDAS to AirVision, and anticipates completion of the project by the end of 2013.

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### 3.2.7 Future Replacement of Analyzers and Equipment

In an effort to save staff time and maintain data collection objectives, VCAPCD has an equipment replacement schedule set up to replace our old equipment as it begins to fail

, and a cost/benefit analysis shows that equipment replacement is more prudent that equipment repair

. Table 7 is the anticipated analyzer and equipment replacement schedule for the next few fiscal years. This schedule is updated on an as

- needed basis; if current equipment
continues to function well , then replacement dates are postponed

.

Table 7

– Analyzer and Equipment Replacement

– Post June 2013

Date(s) Equipment Event Notes

FY 2013/2014 Two ozone analyzers Planned

“ One air quality analyzer calibrator Planned

“ One zero air generator Planned

“ One PM 2.5 FRM sampler Planned

“ One PM 2.5 FEM sampler Planned

FY 2014/2015 Two ozone analyzers Planned

One PM 10 FRM sampler Planned

FY 2015/2016 One ozone analyzer Planned

“ One air quality analyzer calibrator Planned

“ One PM 2.5 FRM sampler Planned

“ Two PM 2.5 FEM sample rs Planned

“ Two PM 10 FEM samplers Planned

“ One flow calibrator Planned For air quality gaseous analyzers

“ Glass sample trains Planned

Mid/Late 2015 Equipment for new Near

- Road

NO 2 monitor Planned Specific equipment unknown (as of June 2013)

. Beg in purchase and preparation for setup and testing at new site.

FY 2016/2017 One ozone analyzer Planned

“ Two PM 2.5 FEM samplers Planned

“ One NO2/NOx/NO analyzer Planned

“ Equipment for new Near

- Road

NO2 monitor

- finalize Planned Specific equipment unknown (as of June 2013) . Complete acquisition and installation of equipment for new site.

FY 2017/2018 One ozone analyz er Planned

“ Site computers

–

all sites Planned Only if needed

- technological improvements of air quality analyzers may make use of computers obsolete.

“ AirVision data management

computer Planned For VCAPCD office

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- 1 VENTURA COUNTY APCD MONITORING DIVISION 

## Appendix A 2013 ANNUAL AIR MONITORING NETWORK PLAN CHECKLIST

The VCAPCD has included this appendix in an effort to clearly commu nicate the location of information required as part of Annual Monitoring Network Plans per 4 0 CFR 58. Table 8 is taken from the 2013 Annual Air Monitoring Network Plan Checklist , provided to Kent Field, Monitoring Division Manage r, VCAPCD, by Meredith Kurpius, PhD., Air Quality Analysis Office, Air Monitoring Team Lead, EPA Region 9. District staff replaced the column “Was the info submitted? If yes, page #s. Flag if incorrect?” in the original

checklist with “Location of submi tted info.” Otherwise, the content of the table is the same as the original checklist received by Dr Kurpius.

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

1. Submit plan by July 1 st 58.10 (a)(1) Submittal letter

2. Statement of purpose for each monitor 58.10 (a)(1) Section 2.1 and Appendix B [Yes if correct info

wa s submitted]

3. 30

- day public comment / inspection period 58.10 (a)(1), 58.10 (a)(2) Section 1

4. Modifications to SLAMS network

– case when we

are not approving actual system modifications (i.e., we will do it outside the ANP process) 58.10 (a)(2)

58 .10(e) Appendix F [Yes if correct info was submitted]

5. Modifications to SLAMS network

– case when we

are approving actual system modifications per 58.14(c) 58.10 (a)(2) 58.10 (b)(5) 58.10(e) 58.14 (c) Appendix F [Yes if correct info

was submitted and 58.14(c) has been met]

6. Does plan include documentation (e.g., attached

approval letter) for system modifications that have been approved since last ANP approval? Appendix F [Yes if correct info was submitted]

7. NCore site operational (by 1/1/2011) 58.10 (a)(3) Appendix C (NA)

8. Pb site for 0.5

- 1.0 tpy sources operational (by

12/27/2011) 58.10 (a)(4) Appendix C (NA)

9. NO2 plan for area

- wide and RA40 sites submitted

by 7/1/2012 58.10 (a)(5) Appendix C (NA)

10. NO2 area

- wide and RA40 sites operational by

1/1/2013 58.10 (a)(5) Appendix C (NA)

11. NO2 plan for Near

- Road sites submitted by

7/1/2013 58.10 (a)(5) Appendix C (NA)

12. SO2 sites operational (by 1/1/2013) 58.10 (a)(6) and 58.13(d) Appendix C (NA)

13. AQS site identification number for each site 58.10 (b)(1) Table 1 and App endix B [Yes if correct info

was submitted]

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citat ion

within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

14. Location of each site: street address and

geographic coordinates 58.10 (b)(2) Appendix B [Yes if correct info was submitted]

15. Sampling and analysi s method(s) for each

measured parameter 58.10 (b)(3) Appendix B

16. Any proposals to remove or move a monitoring

station within a period of 18 months following plan

submittal 58.10 (b)(5) NA [Yes if correct info was submitted, (assumes we are
not approv ing the changes in ANP)]

17 Scale of representativeness for each monitor as

defined in Appendix D 58.10(b)(6); App D Appendix B

18. Identification of sites suitable and sites not suitable

for comparison to the annual PM2.5 NAAQS as

described in Part 58.30 58.10 (b)(7) Appendix B

19. MSA, CBSA, CSA or other area represented by the

monitor 58.10 (b)(8) Appendix B [Yes if correct info was submitted]

20. Designation of any Pb monitors as either source

oriented or non

- source

- oriented 58.10 (b)(9) Appe ndix C (NA) [Yes if correct info was submitted]

21. Any source

- oriented Pb site for which a waiver has

been granted by EPA RA 58.10 (b)(10) Appendix C (NA) [Yes if correct info was submitted]

22. Any Pb monitor for which a waiver has been

requested or granted by EPA RA for us of Pb

- PM10
in lieu of Pb

- TSP 58.10 (b)(11) Appendix C (NA) [Yes if correct info was submitted]

23. Identification of required NO2 monitors as either

Near

- Road or area

- wide 58.10 (b)(12) Table 1 and Appendix C

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

24. Identific

ation of any PM2.5 FEMs and/or ARMs not eligible to be compared to the NAAQS (Note 1: must include required data assessment.) ( Note 2: Required SLAMS must monitor PM2.5 with
NAAQS

- comparable monitor at the required sample frequency.) 58.10 (b)(13) 58.11 (e ) NA

25. For SPMs listed as non

- regulatory, note the start

Date of FRM/FEM/ARM at SPM. If > 24 months, and monitor is eligible for comparison to the NAAQS per 58.11 (e) and 58.30, the agency must supply information that App A, C or E requirements were

not met. 58.20(c) NA

26. 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. 58.10 (c) Appendix C [Yes if correct info was submitted]

27. Does t

he plan include a request for approval for and alternative to appendix A requirements for SPMs operating a FRM/FEM/ARM which also meets appendix E? 58.11 (a) (2) NA

28. Precision/Accuracy reports submitted to AQS 58.16(a); App A, 1.3

and 5.1.1 Appendix B

29. Annual data certification submitted 58.15 App. A 1.3 Section 2.4

30. Frequency of flow rate verification for manual PM

samplers audit App A 3.3.2 Appendix B

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### Table 8

– Location of Submitted Informatio n

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

31. Frequency of flow rate verification for automated

PM analyzers audit App A 3 .2.3 Appendix B

32. Frequency of one

- point flow rate verification for Pb

samplers audit App A

3.3.4.1 NA

33. Frequency of one

- point QC check (gaseous) App. A 3.2.1 Appendix B

34. Date of last Annual Performance Evaluation

(gaseous) App. A 3.2.2 Ap pendix B

35. Dates of last two semi

- annual flow rate audits for

PM monitors App A, 3.2.4

and 3.3.3 Appendix B

36. Dates of last two semi

- annual flow rate audits for Pb

monitors App A

3.3.4.1 NA

37. PM2.5 co

- location App A 3.2.5 Appendix E

38. D esignation of a primary monitor if there is more

than one monitor for a pollutant at a site. Need to

determine

collocation Appendix B

39. Distance between co

- located monitors (Note:

waiver request or the date of previous waiver approval must be included if the distance deviates from requirement.) App. A

3.2.5.6 and

3.2.6.3 Appendix B

40. Manual PM10 method co

- location met? (note:

continuous PM10 does not have this requirement) App A 3.3.1 Appendix B and Appendix E

41. Pb co

- location App A

3.3.4.3 Appendix E (NA)

42. PM10

- 2.5 co

- location (note: only applies to Fresno

and Phoenix NCore sites) App A 3.3.6 Appendix E (NA)

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network P lan (cont’d)

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

43. Instrument/monitoring method code for each

monitor: is it reported properly? Is it reported correctly (i.e., appropri ate method code for regulatory monitors)? App C

2.4.1.2 Appendix B

44. For agencies that share monitoring responsibilities

in an MSA/CSA: does each affected State or local agency meet full monitoring requirements or is an agreement between the affected agencies and the EPA Regional Administrator in place? App D 2(e) Section 2.3.3

45. Start date for each monitor Required to
determine if other req. (e.g., min #

and co

- lo)

are met Appendix B [Yes if correct info was submitted]

46. Instrument monitor t ype for each monitor Required to
determine if other req. (e.g., min #

and co

- lo)

are met Appendix B [Yes if correct info was submitted]

47. Monitoring objective for each instrument App D 1.1 58.10 (b)(6) Appendix B [Yes if correct info was submitted]

4 8. Site type for each instrument App D 1.1.1 Appendix B [Yes if correct info was submitted]

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citatio n within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

49. Instrument parameter code for each instrument Required to
determine if other req. (e.g., min #

and co

- lo)

are met Appendix B [Yes if correct info

was subm itted]

50. Instrument parameter occurrence code for each

instrument Required to

determine if other req. (e.g., min #

and co

- lo)

are met Appendix B [Yes if correct info was submitted]

51. Sampling season for ozone (note: date of waiver

approval must be included if the sampling season deviates from requirement) 58.10 (b)(4) App D, 4.1(i) Appendix B

52. Sampling schedule for PM2.5

- applies to year

round and seasonal sampling schedules (note: date of waiver approval must be included if the sampling

se ason deviates from requirement) 58.10 (b)(4) 58.12(d) App D 4.7

EPA
flowchart Appendix B

53. Sampling schedule for PM10 58.10 (b)(4) 58.12(e) App D 4.6 Appendix B

54. Sampling schedule for Pb 58.10 (b)(4) 58.12(b) App D 4.5 NA

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

information provided meet the req? Notes

55. Sampling sc hedule for PM10

- 2.5 58.10 (b)(4) 58.12(f) App D 4.8 NA

56. Minimum # of monitors for O3[Note: should be

supported by MSA ID, MSA population, DV, # monitors, and # required monitors] App D, 4.1(a)

and

Table D

- 2 Appendix C

57. Identification of max. conc. O3 monitor(s) App D 4.1 (b) Section 2.3 .1

58. Minimum monitoring requirements met for Near

Road NO2 (2014 start date) App D 4.3.2 Appendix C

59. Minimum monitoring requirements met for area

wide NO2 App D 4.3.3 Appendix C

60. Minimum monitor ing requirements met for RA

- 40
NO2 App D 4.3.4 Appendix C (NA)

61. Minimum monitoring requirements met for SO2

[Note: Only monitors considered to be required SLAMs are eligible to be counted towards meeting minimum monitoring requirements.] App D 4.4 Ap pendix C (NA)

62. Minimum monitoring requirements met for Pb [Note:

Only monitors considered to be required SLAMs are eligible to be counted towards meeting minimum monitoring requirements.] App D 4.5 58.13(a) Appendix C (NA)

63. Minimum # of monitor s for PM2.5 [Note 1: should

be supported by MSA ID, MSA population, DV, # monitors, and # required monitors] [Note 2: Only monitors considered to be required SLAMs are eligible to be counted towards meeting minimum monitoring requirements.] App D, 4.7.1(a) and

Table D

- 5 Appendix C

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

informatio n provided meet the req? Notes

64. Optional PM2.5 Network Clarifications: Provide a list

of required sites if it does not include all SLAMS. [Note: default will assume all SLAMS are considered required sites.] Need to

assess several requirements Sections

2.3.2

– 2.3.4

65. Required PM2.5 sites represent area

- wide air

quality App D 4.7.1(b) Table 3

66. For PM2.5, is at least one site at neighborhood or

larger scale in an area of expected maximum

concentration App D 4.7.1(b)(1) Table 3 and

Appendix B

67. If additional SLAMS PM2.5 required, is there a site

in an area of poor air quality App D 4.7.1(b)(2) NA

68. Minimum monitoring requirements for continuous

PM2.5 App D 4.7.2 Appendix C

69. Requirements for PM2.5 background and transport

sites App D 4.7.3 NA

70. Are PM2.5 Chemical Speciation requirements met

for official STN sites? App D 4.7.4 Section 2.3 .3

71. Minimum # of monitors for PM10 App D, 4.6 (a) and Table

D

- 4 Appendix C

72. Minimum monitoring requirements met for PM10

-

2.5 ma ss App D 4.8 Appendix C (NA)

73. Distance of site from nearest road App E 6 Appendix B

74. Traffic count of nearest road App E Appendix B

75. Groundcover App E 3(a) Appendix B

76. Probe height App E 2 Appendix B

77. Distance from supporting structure App E 2 Appendix B

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### Table 8

– Location of Submitted Information

– 2013 Ambient Air Monitoring Network Plan (cont’d)

ANP requirement Citation

within 40
CFR 58 Location of

submitted info Does the

inform ation provided meet the req? Notes

78. Distance from obstructions on roof App E 4(b) Appendix B

79. Distance from obstructions not on roof App E 4(a) Appendix B

80. Distance from trees App E 5 Appendix B

81. Distance to furnace or incinerator fl ue App E 3(b) Appendix B

82. Unrestricted airflow App E, 4(a) and 4(b) Appendix B

83. Probe material (if applicable) App E 9 Appendix B

84. Residence time (if applicable) App E 9 Appendix B

Public Comments on Annual Network Plan

Were comments submitted to the S/L/T agency during the public comment period? If no, skip the remaining questions. If yes:

 Were any of the comments substantive?

o If yes, which ones?

o Explain basis for determination if any comments were considered not substantive:

 Did t he agency respond to the substantive comments?

o If yes, was the response adequate?

 Do the substantive comments require separate EPA response (i.e., agency response wasn’t adequate)?

 Are the sections of the annual network plan that received substantive comme nts approvable after consideration of comments?

o If yes, provide rationale:

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## Appendix B Detailed Station Information

This appendix presents detailed site information the reporting of which is required by federal regulation.

Table 9

– El Rio St ation Information

Local Site Name > El Rio

– Rio Mesa School #2

AQS ID 061113001

GPS coordinates 34.25238,

- 119.14318

Street address 545 Central Ave, Oxnard CA 9303 0 County Ventura County
Distance to roadways 101 meters

Traffic count 5,000 vehicles/d ay
, 2013

Groundcover Paved/A sphalt Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area Pollutant, POC > Ozone, 1 NO 2 , 1 PM 2.5 FEM, 3 PM 2.5 FRM, 1

Parameter code 44201 42602 88101 881 0 1
Basic monitoring objective NAAQS NAAQS NAAQS NAAQS

Site type Population Exposure Population

Exposure Population

Exposure Population

Exposure Monitor type SLAMS

, PAMS PAMS SLAMS SLAMS

Instrument manufacturer and

model API Model 400 API Model 200 Met One BAM

1020 Thermo Fischer

Scientific 202 5 Seq

. Method code 087 082 170 118
Primary monitor Yes Yes No Yes

FRM/FEM/ARM/other FRM FRM FEM FRM Collecting agency VCAPCD VCAPCD VCAPCD VCAPCD
Analytical lab NA NA NA NA
Reporting agency VCAPCD VCAPCD VCAPCD VCAPCD
Spatial scale Urban Urban Neigh borhood Neighborhood
Monitoring start date 01/01/1979 01/01/1980 01/26/2012 01/01/1999
Current sampling frequency Continuous Continuous Continuous 1

- in

- 6 days Calculated sampling frequency NA NA NA NA Sampling season Year

- round Year

- round Year

- round Ye ar

- round
Probe height 4.3 meters 4.3 meters 4. 6 meters 5. 8 meters Distance from supporting

structure 1.2 meters 1.2 meters 1.7 meters 2.2 meters

Distance from obstructions on

roof None None None None

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### Table 9

– El Rio Station Infor mation (cont’d)

Pollutant, POC > Ozone, 1 NO 2 , 1 PM 2.5 FEM, 3 PM 2.5 FRM, 1

Distance from obstructions not

on roof None None None None

Distance from trees 2 5 meters 2 5 meters 29 meters 27 meters

Distance to furnace or

incinerator flue NA NA NA NA

Dista nce between collocated

monitors NA NA NA NA

Unrestricted airflow 360 degrees 360 degrees 360 degrees 360 degrees

Probe material for reactive

gases Borosilicate glass & FEP

Teflon Borosilicate

glass & FEP

Teflon NA NA

Residence time for reactive

gases 7. 5 seconds 8.8 seconds NA NA

Will there be changes within the
next 18 months? No No No Maybe
see Section

3.1.2 Is it suitable for comparison against the annual PM 2.5 NAAQS? NA NA Yes Yes

Frequency of flow rate

verification fo r manual PM samplers NA NA NA 1x/month flow
2x/month leak

Frequency of flow rate

verification for automated PM analyzers NA NA 2x/month

flow and leak

check NA

Frequency of one

- point QC check for gaseous instruments Weekly Weekly NA NA

Last Annual Perfo rmance Evaluation for gaseous parameters 04/30/2013 04/30/2013 NA NA

Last two semi

- annual flow rate

audits for PM monitors NA NA 11/ 0 7/2012
04/30/2013 11/

0 7/2012
04/30/2013

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### Table 9

– El Rio Station Information (cont’d)

Local Site Name > El Rio

– Rio Mesa School #2

AQS ID 061113001

GPS coordinates 34.25238,

- 119.14318

Street address 545 Central Ave, Oxnard CA 9303 0 County Ventura County
Distance to roadways 101 meters

Traffic count 5,000 vehicles/day , 2013

Groundcover Paved/ A sphalt Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area
Pollutant, POC > PM 10 FEM, 3 PM 10 FRM, 1 VOCs, 1 Carbonyls, 1

Parameter code 81102 81102 NA 43502

43503

43551 Basic monitoring objective NAAQS NAAQS Research Researc h

Site type Population

exposure Population

exposure Maximum

Precursor

Emissions Impact Maximum

Precursor

Emissions Impact Monitor type SLAMS SLAMS PAMS PAMS

Instrument manufacturer and

model Met One BAM

1020 GMW 1200 Varian 3800 Atec Model 800

Method c ode 122 063 123 102
Primary monitor No Yes Yes Yes

FRM/FEM/ARM/other FEM FRM Other Other
Collecting agency VCAPCD VCAPCD VCAPCD VCAPCD

Analytical lab NA NA VCAPCD Atmospheric Analysis & Consulting
Reporting agency VCAPCD VCAPCD VCAPCD VCAPCD
Spatial scale Neighborhood Neighborhood Neighborhood Urban
Monitoring start date 0 7/22/2012 04/03/1988 06/01/1994 06/01/1995

Current sampling frequency Continuous 1

- in

- 6 days 1

- in

- 3 days and days in whic h

ozone is predicted to

exceed .075 ppm 1

- in

- 3 days and

day s in which

ozone is predicted to

exceed .075

ppm Calculated sampling frequency NA NA NA NA

Sampling season Year

- round Year

- round July 1 through September 30 July 1 through

September 30 Probe height 4. 5 meters 5.2 meters 4.3 meters 5.0 meters

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### Table 9

– El Rio Station Information (cont’d)

Pollutant, POC > PM 10 FEM, 3 PM 10 FRM, 1 VOCs, 1 Carbonyls, 1 Distance from supporting

structure 1.6 meters 1. 6 meters 1.2 meters 1.5 meters

Distance from obstructions on

roof None None None None

Distance from obstructions not

on roof None None None None

Distance from trees 29 meters 28 meters 29 meters 30 meters

Distance to furnace or

incinerator flue NA NA NA NA

Distance between collocated

monitors NA NA NA NA

Unrestricted airflow 360 degree s 360 degrees 360 degrees 360 degrees

Probe material for reactive

gases NA NA Borosilicate glass & FEP

Teflon NA

Residence time for reactive

gases NA NA NA Maybe

Will there be changes within
the next 18 months? No Yes Maybe, awaiting EPA

decision NA

I s it suitable for comparison against the annual PM 2.5 NAAQS? NA NA NA NA

Frequency of flow rate

verification for manual PM samplers NA 1x/month

flow NA NA

Frequency of flow rate

verification for automated PM analyzers 2x/month

flow and leak

check NA NA NA

Frequency of one

- point QC check for gaseous instruments NA NA 2x/smog season,
June & October NA

Last Annual Performance Evaluation for gaseous parameters NA NA 2011 NA

Last two semi

- annual flow rate

audits for PM monitors 11/ 0 7/2012
04/30/2013 11/

0 7/ 2012
04/30/2013 NA NA

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### Table 10

– Ojai Station Information

Local Site Name > Ojai

- Ojai Avenue

AQS ID 061111004

GPS coordinates 34.44804,

- 119.23131

Street address 1201 Ojai Ave., Ojai CA 93023
County Ventura County

Distance to roadways 65 meters

Traffic count 7,300 vehicles/day, 2011

Groundcover Paved Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area
Pollutant, POC > Ozone, 1 PM 2.5 FEM, 3

Parameter code 44201 88101
Basic monitoring objective NAAQS NAAQS
Site type Population exposure Population exposure
Monitor type SLAMS SLAMS

Instrument manufacturer and

model API Model 400 Met One BAM 1020

Method code 087 170
Primary monitor Yes Yes

FRM/FEM/ARM/other FRM FEM Collecting agency VCAPCD V CAPCD
Analytical lab NA NA
Reporting agency VCAPCD VCAPCD
Spatial scale Urban Neighborhood
Monitoring start date 04/01/1996 11/29/2011
Current sampling frequency Continuous Continuous
Calculated sampling frequency NA NA Sampling season Year

- round Ye ar

- round
Probe height 4.0 meters 4. 6 meters Distance from supporting

structure 1. 5 meters 1.5 meters

Distance from obstructions on

roof None None

Distance from obstructions not

on roof None None

Distance from trees 35 meters 33 meters

Distance to fur nace or incinerator
flue NA NA

Distance between collocated

monitors NA NA

Unrestricted airflow 360 degrees 360 degrees

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### Table 10

– Ojai Station Information (cont’d)

Pollutant, POC > Ozone, 1 PM 2.5 FEM

, 3

Probe material for reactiv e
gases Borosilicate glass & FEP Teflon NA

Residence time for reactive

gases 8.5 seconds NA

Will there be changes within the
next 18 months? No No

Is it suitable for comparison against the annual PM 2.5 NAAQS? NA Yes

Frequency of flow rate

verification for manual PM samplers NA NA

Frequency of flow rate

verification for automated PM analyzers NA 2x/month

flow and leak check

Frequency of one

- point QC check for gaseous instruments Weekly NA

Last Annual Performance Evaluation for gaseous parameters 05/02 /2013 NA

Last two semi

- annual flow rate

audits for PM monitors NA 11/ 0 7/2012

0 5/ 02 /2012

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### Table 11

– Piru Station Information

Local Site Name > Piru

– Pacific Avenue

AQS ID 061110009

GPS coordinates 34.40426,

- 118.80991

Street address 3301 Pacific Ave., Piru CA 93040
County Ventura County
Distance to roadways 382 meters

Traffic count 23 ,000 vehicles/day, 2011

Groundcover Gravel
Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area
Pollutant, POC > Ozone, 1 PM 2.5 FEM, 3

Parameter code 44201 88101
Basic monitoring objective NAAQS NAAQS
Site type Population exposure Population exposure
Monitor type SLAMS SLAMS

Instrument manufacturer and

model API Model 400 Met One BAM 1020

Method code 087 170
Primary monitor Yes Yes

FRM/FEM/ARM/other FRM FEM Collecting agency VCAPCD VCAPCD
Analytical lab NA NA
Reporting agency VCAPCD VCAPCD
Spatial scale Urban Neighborhood
Monitoring start date 11/03/2000 11/15/2011
Current sampling frequency Continuous Continuous
Calculated sampling frequency NA NA Sampling season Year

- round Year

- round
Probe height 3. 5 meters 4. 6 meters Distance from supporting structure 1.0 meters 2.0 meters

Distance from obstructions on roof None None

Distance from obstructions n ot on
roof None None

Distance from trees 30 meters 29 meters

Distance to furnace or incinerator

flue NA NA

Distance between collocated

monitors NA NA

Unrestricted airflow 360 degrees 360 degrees
Probe material for reactive gases Borosilicate glass & F EP Teflon NA
Residence time for reactive gases 9.9 seconds NA

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### Table 11

– Piru Station Information (cont’d)

Pollutant, POC > Ozone, 1 PM 2.5 FEM

, 3 Will there be changes within the

next 18 months? No No

Is it suitable for compariso n against the annual PM 2.5 NAAQS? NA Yes

Frequency of flow rate verification for manual PM samplers NA NA

Frequency of flow rate verification for automated PM analyzers NA 2x/month

flow and leak check Frequency of one

- point QC check for gaseous instrume nts Weekly NA

Last Annual Performance Evaluation for gaseous parameters 05/ 20 /201 3 NA

Last two semi

- annual flow rate

audits for PM monitors NA 11/ 0 7/2012
05/20/2013

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### Table 12

– Simi Valley Station Information

Local Site Name > S imi Valley

– Cochran Street

AQS ID 061112002

GPS coordinates 34.27640,

- 118.68375

Street address 5400 Cochran St., Simi Valley CA 93063
County Ventura County
Distance to roadways 278 meters

Traffic count 10, 2 00 vehicles/day , 2013

Groundcover Asphalt Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area

Pollutant, POC > Ozone, 1 NO 2 , 1 PM 2.5 FRM, 1 PM 2.5 Non

- FEM, 3

Parameter code 44201 42602 88101 88501
Basic monitoring objective NAAQS NAAQS NAAQS Public Information

Site type Highest

concentration Highest

concentration Highest

concentration Highest

concentration
Monitor type SLAMS , PAMS PAMS SLAMS SLAMS

Instrument manufacturer and

model API Model 400 API Model 200 Thermo Fischer
Scientific 2025 Seq. Met One BAM

1020

Me thod code 087 082 118 170

Primary monitor Yes Yes Yes No

FRM/FEM/ARM/other FRM FRM FRM NA
Collecting agency VCAPCD VCAPCD VCAPCD VCAPCD

Analytical lab NA NA NA NA

Reporting agency VCAPCD VCAPCD VCAPCD VCAPCD

Spatial scale Urban Urban Neighborhood Nei ghborhood

Monitoring start date 06/01/1985 06/01/1985 01/01/1999 01/01/2004
Current sampling frequency Continuous Continuous 1

- in

- 3 days Continuous
Calculated sampling frequency NA NA NA NA
Sampling season Year

- round Year

- round Year

- round Year

- round

P robe height 3.5 meters 3.5 meters 6.8 meters 4.6 meters
Distance from supporting structure 1.0 meters 1.0 meters 2.3 meters 2.3 meters

Distance from obstructions on roof None None None None

Distance from obstructions not on

roof None None None None

Dis tance from trees 49 meters 49 meters 60 meters 49 meters

Distance to furnace or incinerator

flue NA NA NA NA

Distance between collocated

monitors NA NA NA NA

Unrestricted airflow 360 degrees 360 degrees 360 degrees 360 degrees

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### Table 12

– Simi Valley Station Information (cont’d)

Pollutant, POC > Ozone, 1 NO 2 , 1 PM 2.5 FRM, 1 PM 2.5 Non

- FEM, 3

Probe material for reactive gases Borosilicate glass
& FEP Teflon Borosilicate glass

& FEP Teflon NA NA

Residence time for reactive gases 10. 2 seconds 9.3 seconds NA NA
Will there be changes within the
next 18 months? No No Yes

, Reduction Yes,

become FEM Is it suitable for comparison against

the annual PM 2.5 NAAQS? NA NA Yes No, will be with

FEM Frequency of flow rate verification

for manu al PM samplers NA NA 1x/month flow
2x/month leak NA

Frequency of flow rate verification for automated PM analyzers NA NA NA 1x/month

flow and leak

check Frequency of one

- point QC check for gaseous instruments Weekly Weekly NA NA

Last Annual Performanc e Evaluation for gaseous parameters 05/09/2013 05/09/2013 NA NA

Last two semi

- annual flow rate

audits for PM monitors NA NA 11/ 0 6/2012
05/09/2013 11/ 0 6/2012
05/09/2013

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### Table 12

– Simi Valley Station Information (cont’d)

Local Site Name > Simi Valley

– Cochran Street

AQS ID 061112002

GPS coordinates 34.27640,

- 118.68375

Street address 5400 Cochran St., Simi Valley CA 93063
County Ventura County
Distance to roadways 278 meters

Traffic count 10, 2 00 vehicles/day, 2013

Groundcove r Asphalt Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area

Pollutant, POC > PM 2.5 Speciation,

1 PM 2.5 Speciation,

1 VOCs, 1 PM 10 FEM, 3

Parameter code NA NA NA 81102

- 3
Basic monitoring objective Research Research Research NAAQS

Site type Other Other Maximum

Precursor Emissions Impact Highest

Concentration

Monitor type STN STN PAMS SLAMS

Instrument manufacturer and

model Met One Sass URG 3000 N Varian 3800 Met One BAM

1020

Method code 811 871 123 122

Primary monitor Yes Yes Yes No

FRM/FEM/ARM/other Other Other Other FEM
Collecting agency VCAPCD VCAPCD VCAPCD VCAPCD

Analytical lab US EPA US EPA VCAPCD NA

Reporting agency VCAPCD VCAPCD VCAPCD VCAPCD

Spatial scale NA NA Urban Neighborhood

Monitoring start date 12/01/2 001 03/01/2009 06/01/1994 06/19/2012

Current sampling frequency 1

- in

- 3 days 1

- in

- 3 days 1

- in

- 3 days and days in which ozone is predicted

to exceed .075

ppm Continuous

Calculated sampling frequency NA NA NA NA

Sampling season Year

- round Year

- round July 1 through September 30 Year

- round

Probe height 6.3 meters 6.0 meters 5.0 meters 4. 5 meters
Distance from supporting structure 1.8 meters 1.5 meters 1.5 meters 2.2 meters

Distance from obstructions on roof None None None None

Distance from obstructions n ot on
roof None None None None

Distance from trees 73 meters 62 meters 47 meters 48 meters

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### Table 12

– Simi Valley Station Information (cont’d)

Pollutant, POC > PM 2.5 Speciation,

1 PM 2.5 Speciation,

1 VOCs, 1 PM 10 FEM, 3

Distance t o furnace or incinerator

flue NA NA NA NA

Distance between collocated

monitors NA NA NA NA

Unrestricted airflow 360 degrees 360 degrees 360 degrees 360 degrees

Probe material for reactive gases NA NA Borosilicate glass
& FEP Teflon NA

Residence time fo r reactive gases NA NA NA NA
Will there be changes within the
next 18 months? No No No No

Is it suitable for comparison against

the annual PM 2.5 NAAQS? No No NA NA

Frequency of flow rate verification for manual PM samplers NA NA NA NA

Frequency of flow rate verification for automated PM analyzers NA NA NA 2x/month

flow and leak

check Frequency of one

- point QC check for gaseous instruments NA NA 2x/smog season
June & October NA

Last Annual Performance Evaluation for gaseous parameters NA NA 2011 NA

L ast two semi

- annual flow rate

audits for PM monitors NA NA NA 11/ 0 6/2012
05/09/2013

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### Table 12

– Simi Valley Station Information (cont’d)

Local Site Name > Simi Valley

– Cochran Street

AQS ID 061112002

GPS coordinates 34.27640,

- 1 18.68375

Street address 5400 Cochran St., Simi Valley CA 93063
County Ventura County
Distance to roadways 278 meters

Traffic count 10,200 vehicles/day, 2013

Groundcover Asphalt Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area

Pollutant, POC > PM 10 FRM (Primary), 1 PM 10 FRM (Col l o), 2 TNMOC, 3

Parameter code 81102 81102 43102
Basic monitoring objective NAAQS NAAQS Research

Site type Highest Concentration Highest Concentration Maximum Precursor Emissions Impact

Moni tor type SLAMS SLAMS SLAMS/PAMS

Instrument manufacturer and

model GMW 1200 GMW 1200 Thermo Elect ron 55i

Method code 063 063 164
Primary monitor Yes No Yes

FRM/FEM/ARM/other FRM FRM Other
Collecting agency VCAPCD VCAPCD VCAPCD
Analytical lab NA NA NA
Reporting agency VCAPCD VCAPCD VCAPCD
Spatial scale Neighborhood Neighborhood Urban
Monitoring start date 11/04/1986 08/20/1988 03/01/1992
Current sampling frequency 1

- in

- 6 days 1

- in

- 6 days Continuous
Calculated sampling frequency NA NA NA Sampling s eason Year

- round Year

- round Year

- round
Probe height 6.3 meters 6.3 meters 3.5 meters Distance from supporting

structure 1.8 meters 1.8 meters 1.0 meters

Distance from obstructions on

roof None None None

Distance from obstructions not

on roof None None None

Distance from trees 66 meters 65 meters 48 meters

Distance to furnace or

incinerator flue NA NA NA

Distance between collocated

monitors 3.0 meters 3.0 meters NA

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### Table 12

– Simi Valley Station Information (cont’d)

Pollutant, P OC > PM 10 FRM (Primary), 1 PM 10 FRM (Col l o), 2 TNMOC, 3

Unrestricted airflow 360 degrees 360 degrees 360 degrees

Probe material for reactive

gases NA NA Borosilicate glass &
FEP Teflon

Residence time for reactive

gases NA NA 8.4 seconds

Will there b e changes within

the next 18 months? Yes

, Reduction Yes,

Reduction Maybe

see Section 3.2.5 and Appendix F Is it suitable for comparison against the annual PM 2.5 NAAQS? NA NA NA

Frequency of flow rate

verification for manual PM samplers 1x/month

flow 1x/month

flow NA

Frequency of flow rate

verification for automated PM analyzers NA NA NA

Frequency of one

- point QC check for gaseous instruments NA NA Weekly

Last Annual Performance Evaluation for gaseous parameters NA NA 06/06 /2006

Last two semi

- annual flow rate

audits for PM monitors 11/06/2012
05/09/2013 11/06/2012
05/09/2013 NA

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### Table 13

– Thousand Oaks Station Information

Local Site Name > Thousand Oaks

– Moorpark Road

AQS ID 061110007

GPS coord inates 34.21014,

- 118.87050

Street address 2323 Moorpark Rd., Thousand Oaks CA 91360
County Ventura County
Distance to roadways 193 meters

Traffic count 1 7, 7 00 vehicles/day, 2011

Groundcover Asphalt Representative statistical

area name Oxnard

- Thous and Oaks

- Ventura

Metro Area
Pollutant, POC > Ozone, 1 PM 2.5 FEM, 3 PM 2.5 FRM, 1

Parameter code 44201 88101 88101
Basic monitoring objective NAAQS NAAQS NAAQS
Site type Population Exposure Population Exposure Population Exposure
Monitor type SLAMS SL AMS SLAMS

Instrument manufacturer and

model API Model 400 Met One BAM 1020 Thermo Fischer Scientific 2025 Seq.

Method code 087 170 118
Primary monitor Yes No Yes

FRM/FEM/ARM/other FRM FEM FRM Collecting agency VCAPCD VCAPCD VCAPCD
Analytical lab NA N A NA
Reporting agency VCAPCD VCAPCD VCAPCD
Spatial scale Urban Neighborhood Neighborhood
Monitoring start date 03/01/1992 01/07/2012 01/01/1999
Current sampling frequency Continuous Continuous 1

- in

- 6 days Calculated sampling frequency NA NA NA
Sampli ng season Year

- round Year

- round Year

- round
Probe height 3.7 meters 4.6 meters 4.6 meters Distance from supporting

structure 1.1 meters 2.0 meters 2.0 meters

Distance from obstructions on

roof None None None

Distance from obstructions not on

roof None N one None

Distance from trees 87 meters 87 meters 86 meters

Distance to furnace or incinerator

flue NA NA NA

Distance between collocated

monitors NA NA

- Colo not approved by EPA yet NA

Unrestricted airflow 360 degrees 360 degrees 360 degrees

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### Table 13

– Thousand Oaks Station Information (cont’d)

Pollutant, POC > Ozone, 1 PM 2.5 FEM

, 3 PM 2.5 FRM

, 1

Probe material for reactive gases Borosilicate glass &

FEP Teflon NA NA

Residence time for reactive gases 13.1 seconds NA NA

Will the re be changes within the

next 18 months? No No Yes

, Reduction Is it suitable for comparison against the annual PM 2.5 NAAQS? NA Yes Yes

Frequency of flow rate verification for manual PM samplers NA NA 1x/month flow
2x/month leak Frequency of flow rate ve rification for automated PM analyzers NA 2x/month

flow and leak check NA

Frequency of one

- point QC check for gaseous instruments Weekly NA NA

Last Annual Performance Evaluation for gaseous parameters 0 5/ 0 1 /201 3 NA NA

Last two semi

- annual flow rate

audi ts for PM monitors NA 11/ 0 6/2012

0 5/ 01 /201 3 11/ 0 6/2012

0 5/ 01 /201 3

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### Table 14

– Simi Valley

– Upper Air Station Information

Local Site Name > Simi Valley

– Upper Air

AQS ID 061110008

GPS Coordinates 34.29124,

- 118.79761

Street A ddress 2801 Madera Rd., Simi Valley CA 93063
County Ventura County
Distance to roadways 443 meters

Traffic count 94 ,000 vehicles/day, 2011

Groundcover Gravel
Representative statistical

area name Oxnard

- Thousand Oaks

- Ventura

Metro Area

Last Annual Performance

Evaluation 05/01/2013



### In addition to measuring ambient levels of gaseous and particulate (solid and liquid aerosol) air pollutants listed in Tables 9

– 14 above, stations in Ventura County also collect meteorological data. Table 15 lists the types of meteorological data collected by site, and whether the data is being collected as part of SLAMS or SLAMS and PAMS networks

.

Table 15

– Meteorological Data Collected at Sites

Local Site Name
AQS ID Wind Speed Wind Direc5tion Temperature Relative Humidity Total Solar Radiation Rainfall Ultraviolet Radiation Barometric Pressure Visibility

El Rio

– Rio Mesa School #2

061113001 

###      

Ojai

– Ojai Avenue

061111004 

### 

     

Piru

– Pacific Aven ue
061110009 

### 

     

Simi Valley

– Cochran St

061112002 

###      

Simi Valley Upper Air Profiler

061110008 

###        


Thousand Oaks

– Moorpark Rd

061110007 

### 

     

 Monitored as part of SLAMS network.


###  Monitored as part of S LAMS and PAMS networks.

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## Appendix C Minimum Monitoring Requirements

40 CFR 58.10, Appendix D specifies the minimum requirements for air monitoring networks. As shown in Tables 1 6 through 25

, the VCAPCD air monitoring ne twork meets or exceeds the minimum monitoring requirements for all criteria pollutants.

Certain monitoring requirements in 40 CFR 58 are based upon Metropolitan Statistical Areas (MSAs). MSAs are part of a population, economic and social

- based classificati on of geographical regions developed by the U.S. Census Bureau. An MSA may include one or more counties. However, not all counties are within an MSA. The VCAP C D contains a single MSA, the Oxnard

Thousand Oaks

- Ventura MSA. A Core Based Statistical Area (CB SA) is a collective term for MSAs and micropolitan areas, so since there is only one MSA in Ventura County, the MSA and CBSA are the same.

Ozone

Table 16

– Minimum Monitoring Requirements for Ozone

MSA County Population ( Census Year ) 8

- Hour

Design Value (Years) Design Value

Site (AQS ID) #

Required

Monitors #

Active Monitors # Add’l

Monitors

Needed

Oxnard

- Thousand Oaks

Ventura Ventura County 823,318

(2010) 81 ppb

(2010

- 2012) Simi Valley

(061112002) 2 5 0

Monitors required for SIP or Maintenance Plan: 2

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### PM 2.5



### With regard to 40 CFR 58.10(c), “...review of changes to a PM 2.5 

### monitoring network that impact the location of a violating PM 2.5 

### monitor.” Should such a violation occur, VCAPCD would review the possible causes for the vi olation (weather, geography, changes to the local area). Prior to making any changes to the PM 2.5 

### monitoring network to address such a violation, VCAPCD would consult EPA and CARB regarding possible methodologies to better monitor PM 2.5 

### and better define the issue. Any changes to the monitoring network related to a violating monitor that would change PM 2.5 

### monitoring would be through a process of public comment on the plan via the public notification process.

Table 17

– Minimum Mon itoring Requirements for PM 2.5 

### SLAMS

MSA County Population (Census Year) Ann ual

De sign

Value (Years) Annual

Design Value
Site (AQS ID) Daily Design

Value ( Years ) Daily Design

Value S ite (AQS ID) #

Required
SLAMS

Monitors #

Active
SLAMS

Monitors # Add’ l

SLAMS

Monitors

Needed

Oxnard

- Thousand Oaks

- Ventura Ventura County 823,318

(2010 ) 8.9 μg/m 3

(2010

- 2012) Thousand

Oaks (061110007) Simi Valley (061112002) 20 μg/m 3

(2010

- 2012) Thousand

Oaks (061110007) 1 8 0



### Table 18

– Minimum Monitoring Requirements for Continuous PM 2.5 

### Monitors

MSA County Population (Census Year) Ann ual

De sign

Value (Years) Annual

Design Value
Site (AQS ID) Daily Design

Value ( Years ) Daily Design

Value S ite (AQS ID) #

Required
Continuous

Monitors # Active

C ontinuous

Monitors # Add’l

Continuous

Monitors

Needed

Oxnard

- Thousand Oaks

- Ventura Ventura County 823,318

(2010 ) 8.9 μg/m 3

(2010

- 2012) Thousand

Oaks (061110007) Simi Valley (061112002) 20 μg/m 3

(2010

- 2012) Thousand

Oaks (061110007) 1 5 0

Monitors requ ired for SIP or Maintenance Plan: None.

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### PM 10



### PM 10

- 2.5 

### monitoring is required only at NCore stations. There is no requirement for an NCore station in Ventura County.

Table 19

– Minimum Monitoring Requirements for PM 10

MSA County Population ( Census Year ) Max

Concen tration Max

Concen tration
S ite #

Required

Monitors #

Active

Monitors # Add’l

Monitors

Needed

Oxnard

- Thousand Oaks

- Ventura Ventura County 823,318

(2010) 39 μg/m 3 Simi Valley (061112002 ) 1

- 2 5 0

Monitors required for SIP or Maintenance Plan: None.



### Table 20

– Minimum Monitoring Requirements for PM 10

- 2.5

MSA County Population ( Census Year ) Max

Concen tration Max

Concen tration
S ite #

Required

Monitors #

Active

Monitors # Add’l

Monitors

Nee ded

Oxnard

- Thousand Oaks

- Ventura Ventura County 823,318

(2010) 39 μg/m 3 Simi Valley (061112002 ) 0 0 0

Monitors required for SIP or Maintenance Plan: None.



### NO 2



### The VCAPCD previously operated monitors to measure levels of nitrogen dioxide (NO 2 

### ) at the Oj ai, Ventura

, and Thousand Oaks monitoring stations. Because of the low levels recorded, NO 2 

### monitoring at these stations was discontinued in July 2004. The VCAPCD currently monitors for NO 2 

### at El Rio and Simi Valley monitoring stations as part of PAMS

. T here are no NO 2 

### monitors required in Ventura County for RA

- 40 monitoring. There are no NO 2 

### monitors required for SIP or maintenance planning.

In 2010

, EPA adopted a new NAAQS for nitrogen dioxide (NO 2 

### ). Per 40 CFR 58.10(a)(5)(v) , o ne Near

- Road monitor NO 2 

### monitor will be required for Ventura County

. When NO 2 

### Near

- Road requirements are defined by EPA, VCAPCD expects to establish the
ambient NO 2 

### Near

- Road monitor ing site along US Highway 101 (t he Ventura Freeway), in Thousand Oaks between Hampshire

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### Road and Westlake Village Road. The Near

- Road NO 2 

### monitor must be operational by January 1, 2017. Discussion of the future

Near

- Road NO 2 

### monitoring site is included in Section 3.2.4

.

Table 21

– Minimum Mo nitoring Requirements for NO 2

CBSA Population (Census Year) Max AADT

Counts (Year) #

Required

Near

- Road

Monitors #

Active

Near

- Road

Monitors #

Add’l

Near

- Road

Monitors

Needed #

Required

Area

- wide

Monitors # Active

Area

- wide

Monitors # Add’l

Area

- wide

Monitors

Needed

Oxnard

- Thousand Oaks

Ventura 823,318 (2010) 189,000

(2011) 0 0 0 0 * 2 0

* Review of minimum monitoring requirements indicates that there is no requirement for area

- wide NO 2 monitoring in Ventura County. Corrections were
made in AQS to change monitor type to PAMS in June 2013 for the El Rio and Simi Valley NO 2 monitors

. Monitors required for SIP or Maintenance Plan: None Monitors required for PAMS : 2 EPA Regional Administrator

- required m onitors per 40 CFR 58, App. D 4.3.4 : None.



### S ulfur Dioxide ( SO 2 

### )

The VCAPCD previously operated a monitor to measure SO 2 

### at the El Rio monitoring station. Because of the low levels recorded,
SO 2 

### monitoring was discontinued in July 2004.

On June 2, 2010, EPA established a new 1

- hour SO 2 

### NAAQS, effe ctive August 23, 2010, which is based on the same 3

- year average of the annual 99 th 

### percentile of 1

- hour daily maximum averages in ppb (level: 75). MSA’s with a population

- weighted emission index (PWEI) greater than a threshold would be required to estab lish an ambient SO 2 

### monitoring program by January 1, 2013. On May 27, 2011

, EPA Region 9 issued an email from Meredith Kurpius, PhD, Air Division, stating that “ EPA did not expect Ventura County to have any additional SO 2 

### monitoring req uirements based on the 2008 NEI

. " Therefore, based on the 2008 National Emissions Inventory (NEI)

, Ventura County fell below the PWEI threshold

, releasing the VCAPCD from the need to
monitor SO 2



### . There are no NO 2 

### monitors required for SIP or maintenance planning.

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### Table 22

– Minimum Monitoring Requirements for SO 2

CBSA County Population ( Census Year ) Total SO 2 Population Weighted

Emissions Index # Required

Monitors #

Active

Monitors # Add’l

Monitors

Needed

Oxnard

- Thousand Oaks

Ventura Ventura
Coun ty 823,318

(2010) NA NA 0 0 0

Monitors required for SIP or Maintenance Plan: None. EPA Regional Administrator

- required m onitors per 40 CFR 58, App. D 4.4.3 : None.



### CO

The VCAPCD previously operated monitors to measure levels of CO at the El Rio and Simi Valley monitoring stations. Because of the low levels recorded, CO monitoring at these stations was discontinued in March and July 2004.

40 CFR 58, Appendix D, Section 4.2 .1 states that CBSAs having a population of 1,000,000 or more persons are required to have
one CO monitor collocated with a Near

- Road NO 2 

### monitor, as required by 40 CFR 58, Appendix D, Section 4.3.2

. Because the population of the Oxnard

- Thousand Oaks

- Ventura CBSA is less than 1,000,000 persons, there is no requirement for a Near

- Road
C O monitor in Ventura County

.

Table 23

– Minimum Monitoring Requirements for CO

CBSA County Population ( Census Year ) # Required

Near

- Road Monitors # Active

Near

- Road Monitors # Add’l

Monitors Needed

Oxnard

- Thousand Oaks

Ventura Ventura County 823,318 (2010) 0 0 0

Monitors required for SIP or Maintenance Plan: None. EPA Regional Administrator

- required m onitors per 40 CFR 58, App. D 4.2.2 : None.

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### NCore

The NCore Network, formerly known as the national Air Monitoring Statons (NAM S) is a multi

- pollutant air monitoring network
across the United States that integrates several advanced measurement systems for particles, pollutant gases and meteorology. Most NCore stations have been operating since the formal start of the network on Ja nuary 1, 2011. NCor e sites are required

under 40 CFR Part 58 .10(a)(3), and are generally sited in large metropolitan areas at a rate of one site per state

. There is no requirement for an NCore site in Ventura County.

Lead ( Pb )

In 2008

, EPA revised the NAA QS for lead from 1.5 μg/m 3 

### to 0.15 μg/m 3 

### . The regulation requires that state and local agencies establish an ambient lead monitor by January 1, 2011. In December 2009

, EPA proposed revisions to the regulation that revise “source oriented” monitoring requ irements. As a result of EPA’s revisions, and EPA’s recent acceptance of the VCAPCD ’s lead

emission invento ry for airports, the VCAPCD will not be subject to the lead monitoring requirements.

Table 24

– Minimum Monitoring Requireme nts for Pb at NCore

NCore Site CBSA Population ( Census Year ) #

Required Monitors #

Active Monitors # Add’l

Monitors Needed

NA Oxnard

- Thousand
Oaks

- Ventura 823,318 (2010) 0 0 0



### Table 25

– Source Oriented Lead Monitoring (Includi ng Airports)

Source Name Address Pb Emissions (tons per year) Emission

Inventory
Source Max 3

- Month

Design Value Design Value

Date #

Required

Monitors #

Active

Monitors # Add’l

Monitors

Needed

NA NA NA NA NA NA 0 0 0 Monitors required for SIP or Maint enance Plan: None. EPA Regional Administrator

- required m onitors per 40 CFR 58, App. D 4.5(c) : None.

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## Appendix D Ambient Air Quality Standards

Table 26

– Ambient Air Quality Standards

Pollutant Averaging Time California Standards National Standards

Ozone (O 3 ) 8 Hour 0.070 ppm 0.075 ppm

1 Hour 0.09 ppm

—

Respirable Particulate Matter (PM 10 ) 24 Hour 50 μg/m 3 150 μg/m 3

Annual Arithmetic Mean 20 μg/m 3

Fine Particulate Matter (PM 2.5 ) 24 Hour

— 35 μg/m 3

Annual Arithmetic Mean 12 μg /m 3 15 μg/m 3

Carbon Monoxide (CO) 8 Hour 9.0 ppm 9 ppm

1 Hour 20 ppm 35 ppm

Nitrogen Dioxide (NO 2 ) 1 Hour 0.18 ppm 100 ppb

Annual Arithmetic Mean 0.030 ppm 0.053 ppm

Sulfur Dioxide (SO 2 ) 1 Hour 0.25 ppm 75 ppb

3 Hour

— 0.5 ppm (secondary)

24 Hour 0.04 ppm 0.14 ppm (primary, certain areas)

Annual Arithmetic Mean

— 0.030 ppm (primary, certain areas)

Lead 30 Day Average 1 .5 μg/m 3

—

Calendar Quarter

— 1 .5 μg/m 3 (certain areas)

Rolling 3

- Month Average

— 0. 1 5 μg/m 3

Visibility Reducing
Part icles 8 Hour Sufficient amount to reduce the prevailing visibility to less than ten miles when the relative humidity is less than 70% —

Sulfates 24 Hour 25 μg/m 3

— Hydrogen Sulfide (H 2 S) 1 Hour 0.03 ppm

—

Vinyl Chloride 24 hour 0.0 1 ppm

—

As of June 7 , 2012.

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## Appendix E Collocation Requirements

40 CFR 58, Appendix A, Section 3 includes collocation requirements for PM 2.5 

### , continuous

PM 2.5 

### , PM 10 

### , and Pb monitoring networks. The requirements apply at the PQAO level. A
PQAO is a monitoring organization or a coordinated aggregation of such organizations that is responsible for a set of stations that monitors the same pollutant and for which data quality assessments can logically be pooled. Ventura County is in the CARB PQAO.

PM 2.5 

### FRM

There are three Thermo Fischer Scientific 2025 Sequential PM 2.5 

### FRM samplers (method code 118) in Ventura County. They are all designated as primary monitors, and are located at the El Rio, Simi Valley, and Thousand Oaks stations. There are no collocated PM 2.5 

### FRM samplers in the county. However, collocation requirements apply at the PQAO level. The
CARB 2012 Annual Monitoring Report for Small Districts in California indicates that the CARB PQAO, which is the PQAO for Ventura County, is meetin g its collocation requirements for method code 118.

Method Code # Primary Monitors # Required Collocated

Monitors # Active Collocated

Monitors

118 3 0 0



### Continuous PM 2.5



### There are four Met One BAM 1020 continuous PM 2.5 

### FEM samplers (method code 170) in Ventura County, at the El Rio, Ojai, Piru, and Thousand Oaks stations. Two of these samplers are designated as primary monitors, at the Ojai and Piru stations. There is also
one Met One BAM 1020 continuous PM 2.5 

### non

- FEM sampler (method code 731) at the S imi Valley station. There are no collocated PM 2.5 

### FRM samplers in the county. However, collocation requirements apply at the PQAO level. The CARB 2012 Annual Monitoring Report for Small Districts in California indicates that the CARB PQAO, which is the PQAO for Ventura County, is meeting its collocation requirements for method code 170.

As stated above, collocation requirements apply at the PQAO level. Prior to making any changes to our PM 2.5 

### network, we will consult with CARB (our PQAO) and EPA Region 9. Following our 2013 FRM to FEM comparison study described in Section 3.1.2

, Recent Changes to the PM 2.5 

### and PM 10 

### Monitoring Networks , should the study show good agreement, then VCAPCD would request that we opt out of any colocation requirements
under the PQAO.

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- 2 VENTURA COUNTY APCD MONITORING DIVISION Method Code # Primary Monitors # Required Collocated

Monitors # Active Collocated

Monitors 170 (FEM) 2 1 0



### PM 10



### There are three GMW 1200 PM 10 

### FRM samplers (method code 063) in Ventura County. Two of these samplers are designated as primary monitors, one at the El Rio station and one at the Simi Valley station. There is one collocated PM 10 

### FRM sampler at the Simi Valley monitoring station, located 3 meters from the primary PM 10 

### FRM sampler. If collocation requirements applied at the air district level, Ventura County would be meeting its collocation requirements. However, collocation requirements apply at the PQAO level. The CARB 2012 Annual Monitoring Report for Small Districts in Californ ia indicates that the CARB PQAO, which is the PQAO for Ventura County, needs additional collocated monitors for method code 063, which it intended to address in the year following distribution of the report.

Method Code # Primary Monitors # Required Colloc ated

Monitors # Active Collocated

Monitors

063 2 1 1



### Non

- NCore Pb

There is no source or non

- source Pb monitoring required in Ventura County, and there are no NCore sites in Ventura County. Therefore, there are no collocated monitors in Ventura County.

M ethod Code # Primary Monitors # Required Collocated

Monitors # Active Collocated

Monitors

NA 0 0 0

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## Appendix F Air Monitoring Network Related Correspondence

This appendix contains correspondence about matters related to the ambient air monitoring

network in Ventur a County. Table 27 summarizes the documentation in this appendix.

Table 27

– VCAPCD Air Monitoring Network Correspondence

Date Author Recipient Subject

11/22/2011 Kent Field,

VCAPCD Matt Lakin, EPA,

Region 9 Request for Approval of

Modifications to Particulate Monitoring Networks

02/10/2012 Matthew Lakin,

EPA, Region 9 Kent Field,

VCAPCD Response to Request for Approval of

Modifications to Particulate Monitoring Networks

05/01/2013 Michael Villegas,

VCA PCD Fletcher Clover,

EPA, Region IX 2012 Annual Air Monitoring Data Certification

05/08/2013 Kent Field,

VCAPCD Meredith Kurpius

EPA, Region 9 E mail exchange about discontinuation of the continuous

hydrocarbon sampling at the Simi Valley station

06/ 20 /2 013 Kent Field,
VCAPCD Matthew Lakin

EPA, Region 9 Formal letter discontinuation of the continuous

hydrocarbon sampling at the Simi Valley station

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 2 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 3 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 4 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 5 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 6 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 7 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 8 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 9 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 10 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 11 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 12 VENTURA COUNTY APCD MONITORING DIVISION

### AMBIENT AIR MONITORI NG NETWORK PLAN 2013

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- 13 VENTURA COUNTY APCD MONITORING DIVISION