# Annual Monitoring Network Report for Twenty

- three Districts in California

June 2014

California Environmental Protection Agency 

# Air Resources Board

## ANNUAL MONITORING NETWORK REPORT

FOR 

## TWENTY

- THREE DISTRICTS IN CALIFORNIA

California Air Resources Board

June 2014

## Table of Contents

Section 1 Introduction....................................................

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

Section 2 Monitoring network overview...................................

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

Section 3 Site and monitoring i nformation......

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

Section 4 Ad ditional information about the m onitors

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

Section 5 Federal minimum monit oring r equirements...

......... ........ ......... 2 7

Section 6 Federal monitoring requirements at State

- level or by PQAO or Area

..... ..................................................................................... .. . 36

6.1 Collocation requirement s...............

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

Section 7 Federal air qua lity assurance........................................... 44

Section 8 Operating schedules................

................................. ......... 51

Section 9 Additional information on PM 2.5 monitors

...... ... .................. .. 55

9 .1 Suitability for comparison to the annual P M 2.5 NAAQS

... ........ 55

9 .2 Review of changes to PM 2.5 network

.................................. 55

Section 10 Proposed and recently implemented monitori ng site changes.

. 57

Section 1 1 Access to more informat ion about the network......

............. 59

Appendix A Regulatory l anguage of 4 0 CFR 58.10

. ........................... .. 63

Appendix B Minimum monitoring requirements for O 3 , PM 2.5 and PM 10

... . 67

Appendix C Supporting documents inclu ded in the network plan........

. ... ... 71

Appendix D Acronymns.....................................................

...................... . ... 80

_______________________________________________________________________ i Annual Monitoring Network Report for Twenty

- three Districts in California

## List of Tables

Table 1 Districts Included in the ARB PQAO

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

Table 2 Location of Information Requir ed for Annual Network Plan......... 5

Table 3 Site and Monitoring Information....

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

Table 4 Additional I nformation About the Monitors.........

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

Table 5 Monitoring Sites Operating PM 2.5 non

- FEMs................................ 26

Table 6 Numbers of Required and Existing Sites by Core

- based Statistical Area (CB SA)........................................

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

Table 6 a Core

- Based Statistical Areas in Califo rnia..............................

...... 30

Table 7 Near

- road NO 2 Monitoring Requirements in California.................. 32

Table 8 Minimum Monitoring R equirements for SO 2

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

Table 9 NCore Monitoring in California....................................................... 3 6

Table 10 Collocation Requirements for Manual PM 2.5 Monitors......

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

Table 1 1 Collocation Requirements for C ontinuous PM 2.5 FEM............... 39

Table 12 Design Values for PM 2.5 Collocation Sites.......

............................. 40

Table 13 Distance between Collocated PM Monitors.....

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

Table 14 2013 Audit Date Information for the Monitors in this Plan

..... ... .... 4 7

Table 15 2013 Gaseous Inlet Probe Residence Time....

............................. 49

Ta ble 1 6 Current PM 2.5 FRM Operating Schedules and Design Values.... 52

Table 1 7 Max Concentrations of the PM 10 FRM Sites...........

..... ............... 53


## List of Figure s

Figure 1 The ARB PQAO...........................................

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

Figure 2 Map showing the CBSAs in California......................................... 29

Figure 3 Through

- the

- Probe Audit................................

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

_______________________________________________________________________ ii Annual Monito ring Network Report for Twenty

- three Districts in CaliforniaS ection 1. Introduction

Federal regulations require State and local agencies that conduct ambient air monitoring for regulatory purposes to submit an Annual Monitoring Network Report, beginning in 2007. The report must con tain specific monitoring network information and be available for a 30

- day public inspection period prior to submittal to the U.S. Environmental Protection Agency (U.S. EPA). This report meets the requirements specified in Title 4 0, Code of Federal Regula tions, Part 58.10 (40 CFR 58.10) for a subset of the California monitoring network.

This report covers th e monitoring network for 23 of the 32 air districts within the Air Resources Board (ARB) Primary Quality Assurance Organization (PQAO). A PQAO is the umbrella under which monitoring agencies are organized to ensure that monitoring is conducted according to a common set of procedures, using common calibration facilities and standards, and that oversight is conducted by one air quality organization. Most of the districts in California are included in the ARB PQAO. The exceptions are the South Coast, San Diego, and Bay Area districts, which each comprise their own PQAO. Each PQAO is responsible for their monitoring network and reports directly to U. S. EPA on monitoring network requirements.

Table 1 lists the districts in the ARB PQAO that are included within the scope of this report, as well as those districts that are preparing their own report. This report covers documentation of the monitoring n etwork for the period of Jan uary 1 through December 31, 2013 , along with a discussion of proposed changes to the network. Consistent with direction s from the U.S. EPA, this report includes monitors operated by the local districts, ARB, and other agenci es within the jurisdiction of the region included in this report. This includes monitors designated as State and Local Air Monitoring Sites (SLAMS), National Core (NCore) multi

- pollutant monitoring stations, Special Purpose Monitoring (SPM), and other typ es of monitors operated by ARB, air districts, and National Park Service ( NPS ). This report also includes the Federal Reference Method (FRM) and Federal Equivalent Method (FEM) monitors.

This report documents that the area covered by this report compli es with federal monitoring requirements, which are specified in 40 CFR 58, Appendices A through E. Table 2 identifies the elements from 40 CFR 58 .10 that are required to be included in the annual report. The requirements are comprehensive and include inf ormation on items such as minimum monitoring requirements, monitor operation, monitor siting, sampling schedule, and quality assurance activities.

_______________________________________________________________________ 1 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaO verview of Report

Table 1 and Figure 1 identify the 23 air districts within the ARB PQAO covered in this r eport as well as the 9 districts in the ARB PQAO that ar e preparing their own report. A brief summary of elements included in this report is listed below.

• Summary of CFR elements required for inclusion in the report ;

• Detailed information on each monitor ;

• Minimum monitoring requirements and compliance with these requirements ;

• PM collocation requirements ;

• PM design values ;

• PM 2.5 FRM operating schedules ;

• Proposed and implemented network changes

. In compiling this report, ARB solicited input from and r eview by the local air districts whose jurisdictions are included. Also, the report was available for a 30 day public inspection period prior to its submittal to the U.S. EPA. T his report can be downloaded from the internet at www.arb.ca.gov/aqd/amnr/amnr.htm

.

_______________________________________________________________________ 2 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 1 Districts Included in the ARB Primary Quality Assurance Organization (PQAO)

Air districts that are Air districts drafting included in this ARB report their own Annual Network Plans Amador County APCD Great Basin Unified APCD Antelope Valley APCD Imperial County APCD Butte County AQMD Monterey Bay Unified APCD Calaveras County APCD North Coast Unified AQMD Colusa County APCD Sacramento Metropolitan A QMD Eastern Kern APCD San Joaquin Valley APCD El Dorado County AQMD San Luis Obispo County APCD Feather River AQMD Santa Barbara County APCD Glenn County APCD Ventura County APCD Lake County AQMD Lassen County APCD Mariposa County APCD Mendocino County AQMD Modoc County APCD Mojave Desert AQMD Northern Sierra AQMD Northern Sonoma County APCD Placer County APCD Shasta County AQMD Siskiyou County APCD Tehama Cou nty APCD Tuolumne County APCD Yolo

- Solano AQMD

Notes: APCD stands for Air Pollution Control District

. AQMD stands for Air Quality Management District

. The South Coast, San Diego and Bay Area districts are not included in this table . These three districts are drafting their own network plan because they are designated PQAOs.

_______________________________________________________________________ 3 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaFigure 1 California PQAOs

_______________________________________________________________________ 4 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 2 Location of Information Required for Annual Network Plan

Elements required by 40 CFR 58.10 Location in Annual Network Plan
Mon itoring purpose information Section 3 Evidence that siting and operation criteria are met : 40 CFR 58, Appendix A Section 6 & 7 40 CFR 58, Appendix B Section 7 40 CFR 58, Appendix D Section 5 & 6 40 CFR 58, Appendix E Section 7 Air Quality System Site Identification Number (AQS Site ID) Section 3, Table 3 Section 4, Table 4 Location of sites Street address Section 3, Table 3 Geographic coordinates Section 4, Table 4 Sampling and analysis methods of monitors Sec tion 4, Table 4 Operating schedules for monitors Section 8 Proposals to move/remove stations Section 10 Monitoring objectives and spatial scale Section s 3 & 4, Table s 3 & 4 Sites suitable or not for comparison to the annual PM 2.5 National Ambient Air S ection 9 .1 Quality Standard Core

- Based s tatistical area information Section 3, Tables 3 (Metropolitan and M icropolitan) Section 4, Table 4 Section 5, Tables 6, 6 a, 7 & 8 Appendix B Review of changes to PM 2.5 Network Section 9 .2

_______________________________________________________________________ 5 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 2. Moni toring Network Overview

California’s ambient air monitoring network is one of the most extensive in the world , consisting of over 250 sites where air pollution levels are monitored and more than 700 monitors used to measure the pollutant level s. A monito ring network this large is needed to cover the diverse range of topography, meteorology, emissions, and air quality in California, while adequately representing a large population. The monitoring network is critical in assessing the State’s clean air prog ress and in determining pollutant exposures in California.

The network of monitoring sites for a pollutant tends to be denser where the air quality problem is worse and where the population is greater. The monitoring network also strives to provide repr esentative data to all the broad geographical

ar eas in California, including coastal, in terior valleys, desert, and mountainous regions . Monitoring is also conducted in Mexico, across the border from S an Diego and Imperial counties. M onitors are operated by ARB, some by local air districts, and a few by other entities including the N ational P ark S ervice , private contractors, and tribal authorities. Note that t ribal monit ors are not included in this report.

Ambient concentration data are collected for a wide variety o f pollutants. The se include ozone (O 3 ), particulate matter with a diameter of 2.5 microns or less ( PM 2.5 ), particulate matter with a diameter of 10 microns or less ( PM 10 ), and a number of toxic compounds. While toxic s monitoring plays an int egral part in air monitoring programs , this repor t only covers those pollutants specified by federal requirements to be included in the annual monitoring network plans

. Monitoring for meteorological parameters is also conducted at a number of sites. The data is needed to better understand and inform the public about the nature of the ambient air quality problems in California.

Not all pollut ants are monitored at all sites, although m ost sites monitor for multiple pollutants. The State and local air qu ality agencies in California make the effort to only collect data that is needed from each site

. The needs for the monitor ing data are varied. A sense for this can be gathered from the information on monitoring objectives and purposes in the next section of this report. A fundamental purpose of monitoring is to distinguish between are as where pollutant levels violate the ambient air quality standards and areas where they do not . Health

- based ambient air quality standards are set at levels of pollutant

c oncentration s that protect against adverse impacts to human health. Areas in violation of a standard usually have increased efforts to reduce the sources of pollution that result in the exceedances. In other words, air quality agencies develop strategies and regulations to achieve needed emission reductions. Data from the ambient monitoring network are then used to indicate the success of this, in terms of the rate of progress towards attaining the standards or to show that standards have been attained.

_______________________________________________________________________ 6 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 3. Site and Monitoring Information

This section details monitoring information for the sites and monitors that fall within the geographical scope of this report. U.S. EPA requires three types of information to be included in the annua l network plans. These are: f ederal s ite t ype, f ederal m onitoring o bjective, and f ederal monitor t ype. The first three subsections , below, describe these federal monitoring requirements . The fourth

su bsection provides detail on s tate and l ocal monitoring p urpose s, which encompass a broader scope of active program areas than the federal monitoring requirements

.

Federal Site type

M onitoring sites must be capable of informing air quality program managers about many things including the peak air pollution levels, typical levels in populated areas, air pollution transported into and outside of a city or region, air pollution levels near specific sources. For these reasons, U.S. E PA requires that each monitor at a site be designated , at a minimum, with one of the t welve site type s that are established in the Air Quality System ( AQS ) database. The twelve site type s are:

 Extreme Downwind  Max Ozone Concentration  Highest Concentration  Max Precursor Emissions Impacts  Population Exposure  Source Oriented  Upwind Background  Welfare Related Impacts  Regional Transport  General  Quality Assurance  Other

While most of the site type s are specific to a monitoring purpose , for example population exposure, two site type s are general in nature and could be used for b road purposes (i.e., G eneral and O ther). States are encouraged not to use the general or other categories unle ss no other options are appropriate

. U.S. EPA requires that a monitor be p roper ly d esignated with an appropriate site type so that th e data coll ected by the monitor at a site can be used to support the three basic federal monitoring objectives , which are discussed in more detail below

. The site type of the monitors covered in this report is included in Table 3.

Federal Monitoring Objective

An a mbient air monitoring network must be designed to meet three basic federal monitoring objectives, which are :

1) to provide air quality data t o the public in a timely manner; 2) to support compliance with national air quality standards ; and 3) to support air qualit y research studies.

_______________________________________________________________________ 7 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaFor purpose s of this report, the monitoring objectives are the federal monitoring objectives defined in Appendix D of 40 CFR 58. Federal monitoring regulat ions required that each monitor measuring criteria pollutants have at least on e monitoring objective. However, many air quality agencies operate monitors with multiple objectives in mind

. For example, monitoring is conducted to provide both air quality data to the public as well as to support air quality standards. The federal mo nitoring objective of the monitors covered in this report is included in Table 3.

Federal Monitor Type

U.S. EPA requires that every state establish a network of air monitoring stations for criteria pollutants, using criteria set in the CFR for the monitor ing stations ’ location and operation. The monitoring stations in this network are called the State and Local Air Monitoring Stations (SLAMS). In addition, U.S. EPA requires state and local monitoring agencies to establish monitoring stations to measure ap proximately 60 volatile hydrocarbons and carbonyl s , which plays an integral role in ozone studies. These stations are called the Photochemical Assessment Monitoring Stations (PAMS). A third type of monitor, the Special Purpose Monitor (SPM), is used by s tate and local monitoring agencies to fulfill very specific or short

- term m onitoring goals. While there are a total of fifteen monitor types established by U.S. EPA, SLAMS, PAMS, and SPM are the three most common monitor types used by state and local moni toring agencies in California. Table 3 lists the monitor type of each monitor that is covered in this report. All of t he regulatory monitors included in this report are part of the SLAMS network in California. The completed list of monitor types is list ed at the end of Table 3.

State and Local Monitoring Purposes

There are a number of monitoring purposes besides the federal classifications

. These are di rectly related to the needs of s tate and local agencies. California has a very comprehensive monit oring network that is needed for implementing a variety of programs. Listed below are some of the most common s tate and local monitoring purposes:

• Agricultural Burning refers to the intentional use of fire for vegetation management, both in agricultural settings, such as fields and orchards, as well as in wildlands, including rangeland and forests

, to improve land for wildlife and game habitat or as a tool for disease or pest prevention. Monitors with this purpose are used to assess when and where burnin g
can occur.

• Expected High Concentration monitoring is used to measure pollutant concentrations in areas where air pollution is expected to be at its highest. The S tate designation criteria contain the requirement for this type of monitoring in order to show that an area attains the State air quality standards. During the State area designation process, the data from all

_______________________________________________________________________ 8 Annual Monitoring Network Report for Twenty

- three Districts in Californiamonitors in an area are examined, but only the data from the monitors with the highest concentrations will determine the designation of the area.

• The Geyser Air Monitoring Program (GAMP) was established to monitor ambient air quality in geothermal areas, mainly monitoring for hydrogen sulfide.

• Residential Burning or backyard b urning is the open burning of yard wastes by household resid ents. Backyard burning includes dry weeds, plant pruning, shrubbery, tree trimmings, and branches. Data from monitors with this purpose help guide decisions regarding appropriate times to allow residential burning.

• Representative Concentration means loc ating a site to represent a geographical region with common topography and meteorology. These sites do not necessarily indicate the highest concentrations in the area for a particular pollutant. This is a purpose also listed by the U.S. EPA.

• State Area Designation monitoring is used to determine compliance with the State ambient air quality standards for a particular pollutant. U sing the monitors with the highest concentra tions of a particular pollutant, the ARB determines if t he area is in attainment o r non attainment of the State air quality standards , as already described in the discussion of Expected High Concentration Monitoring.

• State Implementation Plan (SIP) and/or Maintenanc e Plan Requirement is monitoring conducted to demonstrate compliance wit h SIP requirements

. The SIP is a plan prepared by s tates and submitted to the U.S. EPA describing how each area will attain federal air quality standards

. Once an area attains a standard , the area is required to show and maintain that status, which requi res continued monitoring in the area.

• Trend Analysis monitoring is useful for comparing and analyzing air pollution concentrations over time and distance. Usually, trend analyses show the progress or lack of progress in improving air quality for an are a over a period of years. Some sites are more useful than others for trend analyses. For example, it is better to have a history of monitoring at a site that includes the full time period of a trend analysis.

This is n ot a comprehensive list of all s tat e and local monitoring purposes, but only includes the most common purposes used for monitoring by air quality agencies in California

. Note that the terms “objective” and “purpose” are almost analogous to one another and could be used inte rchangeably. Ho wever, to avoid confusion this report separates the monitoring objectives from the monitoring purposes by limiting the monitoring objectives to the three federal objectives as defined above and the monitoring purposes to the s tate and local monitoring purp oses. The s tate and local monitoring purposes are more comprehensive

_______________________________________________________________________ 9 Annual Monitoring Network Report for Twenty

- three Districts in Californiathan th e federal monitoring objectives. The s tate and local monitoring purpose of the monitors covered in this report is included in Table 3.

Summary of Table 3

Table 3 lists the fede ral site type, federal monitoring objective, f eder al monitor t ype, and s tate and l ocal m onitoring p urposes of each monitor covered in this report. In addition, Table 3 lists other site and monitoring information, such as the AQS Site ID, site address, sit e name, pollutants monitored, and parameter codes. Note that the term “site type” refers to the individual monitor(s) at a site and not the site itself. U.S. EPA has determined that a single site type may not describe all of the monitors at a particul ar site; therefore, U.S. EPA established the site type designations at the monitor level, rather t han the site level. A lso note that a monitor can have multiple site type, monitoring objective, monitor type, or monitoring purpose designations.

Finally, Tabl e 3 also lists the location of each monitor, including the Core

- Based Statistical Area (CBSA) in which the monitor is located. CBSAs are defined by the United States Office of Management and Budget (OMB) and provide a consistent set of geographical areas for Federal agencies to use in collecting, tabulating, and publishing statistical data. Two types of areas are included as CBSAs: Metropolitan Statistical Areas and Micropolitan Statistical Areas. The difference between a Metropolitan and Micropolitan s tatistical area is the level of population. A Metropolitan Statistical Area has an urban core with a population of 50,000 or more, whereas a Micropolitan Statistical Area has an urban core with a population of at least 10,000, but less than 50,000. Both Metropolitan and Micropolitan statistical areas comprise one or more counties.

U.S. EPA specifies the number of monitors required for each pollutant based on the OMB statistical areas. Older standards, such as the federal ozone standard, specify requir ed monitors based on Metropolitan Statistical Area and Micropolitan Statistical Area. More recent standards, such as the federal SO 2 standard, use the newer collective term, CBSA. Because it is more current, the term CBSA is used in this report, as well. A comprehensive CBSA list for California is provided in Table 6 a and Figure 2 of this report . Also i n Table 6 a is information about CBSAs that are not covered in this plan, but are covered either in part or in whole, in other individual district plans.

_______________________________________________________________________ 10 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 3 Site and Monitoring Information (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Address/AQS Site # 44201 42101 42602 42401 88101 81102

LAKE COUNTY AIR BASIN
Lake County / CBSA: Clearlake Micropolitan Statistical Area Middletown-Anderson Springs Road** Site Type: Gnrl 11270 Anderson Springs Road, Middletown Monitoring Obj.: RSupport
060333010 Monitoring Purp.: StateD, GAMP Monitor Type: SLAMS

Glenbrook-High Valley Road** Site Type: Gnrl 8276 High Valley Road, Cobb Monitoring Obj.: RSupport
060333011 Monitoring Purp.: StateD, GAMP Monitor Type: SLAMS

Lakeport-Lakeport Blvd** Site Type: Gnrl Gnrl Gnrl 905 Lakeport Blvd, Lakeport Monitoring Obj.: NAAQS NAAQS NAAQS
060333001 Monitoring Purp.: StateD StateD StateD Monitor Type: SLAMS SLAMS SLAMS

LAKE TAHOE AIR BASIN
El Dorado County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area South Lake Tahoe-Sandy Way Site Type: (PopEx) 3337 Sandy Way, South Lake Tahoe Monitoring Obj.: (NAAQS/PublicR)
060170011 Monitoring Purp.: (RConc) Monitor Type: (SLAMS)

MOJAVE DESERT AIR BASIN
Kern County / CBSA: Bakersfield Metropolitan Statistical Area Canebrake-3147 Highway 178 Site Type: PopEx 3147 Highway 178, Canebrake Monitoring Obj.: NAAQS
060290017 Monitoring Purp.: RConc Monitor Type: SLAMS

Mojave-923 Poole Street Site Type: HConc (PopEx) (PopEx) 923 Poole Street, Mojave Monitoring Obj.: NAAQS (NAAQS) (NAAQS)
060290011 Monitoring Purp.: SIPMain, Trans (StateD) (StateD) Monitor Type: SLAMS (SLAMS) (SLAMS)

Ridgecrest-100 West California Avenue Site Type: PopEx PopEx 100 West California Avenue, Ridgecrest Monitoring Obj.: NAAQS NAAQS
060290015 Monitoring Purp.: StateD, RConc SIPMain, StateD Monitor Type: SLAMS SLAMS

Los Angeles County / CBSA: Los Angeles-Long Beach-Anahiem Metropolitan Statistical Area

Lancaster-43301 Division Street Site Type: Trans Gnrl Gnrl HConc (Gnrl) 43301 Division Street, Lancaster Monitoring Obj.: NAAQS NAAQS NAAQS NAAQS (NAAQS/PublicR)
060379033 Monitoring Purp.: Trnds RConc RConc RConc (RConc) Monitor Type: SLAMS SLAMS SLAMS SLAMS (SLAMS)

Riverside County / CBSA: Riverside-San Bernardino-Ontario Metropolitan Statistical Area Blythe-445 W Murphy Street Site Type: Gnrl 445 W Murphy Street, Blythe Monitoring Obj.: NAAQS/PublicR
060659003 Monitoring Purp.: RConc Monitor Type: SLAMS

San Bernardino County / CBSA: Riverside-San Bernardino-Ontario Metropolitan Statistical Area

Barstow-200 E Buena Vista Road Site Type: Trans Gnrl Gnrl (Gnrl) 200 E Buena Vista Road, Barstow Monitoring Obj.: NAAQS NAAQS NAAQS (NAAQS)
060710001 Monitoring Purp.: StateD StateD StateD (StateD) Monitor Type: SLAMS SLAMS SLAMS (SLAMS)

Hesperia-Olive Street Site Type: Trans (Gnrl) 17288 Olive Street, Hesperia Monitoring Obj.: NAAQS (NAAQS)
060714001 Monitoring Purp.: StateD (StateD) Monitor Type: SLAMS (SLAMS)

Table 3 (cont.)

_______________________________________________________________________ 11 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite and Monitoring Information (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Address/AQS Site # 44201 42101 42602 42401 88101 81102

Joshua Tree National Mont.-Black Rock Site Type: PopEx 060719002 Monitoring Obj.: NAAQS/PublicR Monitoring Purp.: RConc

Monitor Type: SLAMS

Lucerne Valley-Middle School Site Type: Gnrl 8560 Aliento-Middle School, Lucerne Valley Monitoring Obj.: NAAQS
060710013 Monitoring Purp.: StateD Monitor Type: SLAMS

Phelan-Beekley and Phelan Roads Site Type: Trans Beekley Road and Phelan Road, Phelan Monitoring Obj.: NAAQS
060710012 Monitoring Purp.: StateD Monitor Type: SLAMS

Trona-Athol and Telescope Site Type: Gnrl Gnrl Gnrl (HConc) Corner of Athol and Telescope, Trona Monitoring Obj.: NAAQS NAAQS NAAQS (NAAQS)
060711234 Monitoring Purp.: StateD StateD StateD (StateD) Monitor Type: SLAMS SLAMS SLAMS (SLAMS)

Victorville-14036 Park Avenue Site Type: Trans Gnrl Gnrl Gnrl Gnrl (PopEx) 14036 Park Avenue, Victorville Monitoring Obj.: NAAQS NAAQS NAAQS NAAQS NAAQS (NAAQS)
060710306 Monitoring Purp.: StateD StateD StateD StateD StateD (StateD) Monitor Type: SLAMS SLAMS SLAMS SLAMS SLAMS (SLAMS)

MOUNTAIN COUNTIES AIR BASIN
Amador County / Not in a CBSA

Jackson-201 Clinton Road Site Type: Gnrl/Trans 201 Clinton Road, Jackson Monitoring Obj.: NAAQS
060050002 Monitoring Purp.: StateD/SIPMain Monitor Type: SLAMS

Calaveras County / Not in a CBSA

San Andreas-501 Gold Strike Road Site Type: Gnrl/Trans (Gnrl) Gnrl 501 Gold Strike Road, San Andreas Monitoring Obj.: NAAQS (NAAQS/PublicR) NAAQS
060090001 Monitoring Purp.: StateD/SIPMain (RConc) StateD Monitor Type: SLAMS (SPM) SLAMS

El Dorado County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area Cool-Highway 193 Site Type: HConc 1400 American River Trail, Cool Monitoring Obj.: NAAQS
060170020 Monitoring Purp.: SIPMain Monitor Type: SLAMS

Echo Summit Site Type: Trans 21200 Highway 50-Little Norway Monitoring Obj.: NAAQS
060170012 Monitoring Purp.: StateD Monitor Type: SLAMS

Placerville-Gold Nugget Way Site Type: HConc/Trans 3111 Gold Nugget Way, Placerville Monitoring Obj.: NAAQS
060170010 Monitoring Purp.: StateD Monitor Type: SLAMS

Mariposa County / Not in a CBSA Jerseydale-6440 Jerseydale Site Type: Trans 6440 Jerseydale Road, Jerseydale Monitoring Obj.: NAAQS
060430006 Monitoring Purp.: StateD Monitor Type: SLAMS

Yosemite National Park-Turtleback Dome Site Type: HConc/Trans
060430003 Monitoring Obj.: NAAQS Monitoring Purp.: StateD

Monitor Type: SLAMS

Yosemite Village-Visitor Center Site Type: Gnrl
060431001 Monitoring Obj.: NAAQS Monitoring Purp.: StateD

Monitor Type: SLAMS

Table 3 (cont.)

_______________________________________________________________________ 12 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite and Monitoring Information (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Address/AQS Site # 44201 42101 42602 42401 88101 81102

Nevada County / CBSA: Truckee-Grass Valley Micropolitan Statistical Area Grass Valley-Litton Building Site Type: HConc/Trans PopEx 200 Litton Drive, Grass Valley Monitoring Obj.: NAAQS NAAQS
060570005 Monitoring Purp.: StateD/Trnds StateD Monitor Type: SLAMS SLAMS

Truckee-Fire Station Site Type: Hconc 10049 Donner Pass Road, Truckee Monitoring Obj.: NAAQS
060571001 Monitoring Purp.: StateD Monitor Type: SLAMS

White Cloud Mountain Site Type: Gnrl 26533 State Highway 20, White Cloud Mtn. Monitoring Obj.: NAAQS
060570007 Monitoring Purp.: StateD Monitor Type: SLAMS

Placer County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area Colfax-City Hall Site Type: Gnrl Gnrl 33 South Main Street, Colfax Monitoring Obj.: NAAQS NAAQS
060610004 Monitoring Purp.: StateD StateD Monitor Type: SLAMS SLAMS

Plumas County / Not in a CBSA
Portola-420 N Gulling St Site Type: HConc 420 N Gulling Street, Portola Monitoring Obj.: NAAQS
060631010 Monitoring Purp.: StateD Monitor Type: SLAMS

Quincy-N Church Street Site Type: Hconc 267 North Church Street, Quincy Monitoring Obj.: NAAQS
060631006 Monitoring Purp.: StateD Monitor Type: SLAMS

Tuolumne County / CBSA: Phoenix Lake-Cedar Ridge Micropolitan Statistical Area

Sonora-Barretta Street Site Type: Gnrl 251 South Barretta Street, Sonora Monitoring Obj.: NAAQS
061090005 Monitoring Purp.: StateD/SIPMain Monitor Type: SLAMS

NORTH COAST AIR BASIN Mendocino County / CBSA: Ukiah Micropolitan Statistical Area Fort Bragg-Dana Street Site Type: (Gnrl) 300 Dana Street, Fort Bragg Monitoring Obj.: (NAAQS)
060450010 Monitoring Purp.: (RConc) Monitor Type: (SLAMS)

Ukiah-County Library Site Type: (Gnrl) 105 North Main Street, Ukiah Monitoring Obj.: (NAAQS)
060450006 Monitoring Purp.: (RConc) Monitor Type: (SLAMS)

Ukiah-East Gobbi Street Site Type: Trans 306 East Gobbi Street, Ukiah Monitoring Obj.: NAAQS
060450008 Monitoring Purp.: StateD Monitor Type: SLAMS

Willits-125 East Commercial Street Site Type: (Gnrl) 125 East Commercial Street, Willits Monitoring Obj.: (NAAQS)
060452002 Monitoring Purp.: (RConc) Monitor Type: (SLAMS)

Sonoma County / CBSA: Santa Rosa Metropolitan Statistical Area Cloverdale-100 Washington Street Site Type: Gnrl 100 Washington Street, Colverdale Monitoring Obj.: NAAQS
060970001 Monitoring Purp.: AgBn, ResBn Monitor Type: SLAMS Guerneville-Church and 1st Site Type: Gnrl 16255 1st Street, Guerneville Monitoring Obj.: NAAQS
060973002 Monitoring Purp.: AgBn, ResBn Monitor Type: SLAMS

Table 3 (cont.)

_______________________________________________________________________ 13 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite and Monitoring Information (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Address/AQS Site # 44201 42101 42602 42401 88101 81102

Healdsburg-133 Matheson Street Site Type: HConc 133 Matheson Street, Healdsburg Monitoring Obj.: NAAQS
060970002 Monitoring Purp.: AgBn, ResBn Monitor Type: SLAMS

Healdsburg-Municipal Airport Site Type: Gnrl 200a Heidelberg Way, Healdsburg Monitoring Obj.: NAAQS
060971003 Monitoring Purp.: StateD Monitor Type: SLAMS

NORTHEAST PLATEAU AIR BASIN
Siskiyou County / Not in a CBSA

Yreka-Foothill Drive Site Type: Gnrl/Trans Gnrl Gnrl 528 Foothill Drive, Yreka Monitoring Obj.: NAAQS/PublicR NAAQS NAAQS
060932001 Monitoring Purp.: StateD StateD AgBn/StateD Monitor Type: SLAMS SLAMS SLAMS

SACRAMENTO VALLEY AIR BASIN
Butte County / CBSA: Chico Metropolitan Statistical Area

Chico-East Site Type: Gnrl Gnrl Gnrl HConc HConc 984 East Avenue, Chico Monitoring Obj.: NAAQS NAAQS NAAQS NAAQS NAAQS
060070008 Monitoring Purp.: StateD/AgBn StateD StateD StateD StateD/AgBn Monitor Type: SLAMS SLAMS SLAMS SLAMS SLAMS

Paradise-4405 Airport Road Site Type: Gnrl/HConc 4405 Airport Road, Paradise Monitoring Obj.: NAAQS
060070007 Monitoring Purp.: StateD/AgBn Monitor Type: SLAMS

Colusa County/ Not in a CBSA

Colusa-Sunrise Blvd Site Type: Gnrl Gnrl Gnrl 100 Sunrise Blvd, Colusa Monitoring Obj.: NAAQS NAAQS NAAQS
060111002 Monitoring Purp.: StateD/AgBn StateD StateD/AgBn Monitor Type: SLAMS SLAMS SLAMS

Glenn County / Not in a CBSA

Willows-Colusa Street Site Type: Gnrl (Gnrl) 720 N Colusa Street, Willows Monitoring Obj.: NAAQS (NAAQS)
060210003 Monitoring Purp.: StateD/AgBn (StateD/AgBn) Monitor Type: SLAMS (SLAMS)

Placer County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area

Auburn-Atwood Site Type: Gnrl (Gnrl) 11645 Atwood Road, Auburn Monitoring Obj.: NAAQS (NAAQS)
060610003 Monitoring Purp.: StateD (StateD) Monitor Type: SLAMS (SLAMS)

Auburn-B Avenue Site Type: Gnrl 11464 B Ave, Auburn Monitoring Obj.: NAAQS
060610002 Monitoring Purp.: StateD Monitor Type: SLAMS

Lincoln-1st Street Site Type: Gnrl 1445 1st Street, Lincoln Monitoring Obj.: NAAQS
060612002 Monitoring Purp.: StateD Monitor Type: SLAMS

Tahoe City Site Type: Gnrl 221 Fairway Drive, Tahoe City Monitoring Obj.: NAAQS
060611004 Monitoring Purp.: StateD Monitor Type: SLAMS

Roseville-N Sunrise Blvd Site Type: Gnrl Gnrl Trans Gnrl 151 N Sunrise Blvd, Roseville Monitoring Obj.: NAAQS NAAQS NAAQS NAAQS
060610006 Monitoring Purp.: StateD/AgBn StateD StateD StateD/AgBn Monitor Type: SLAMS SLAMS SLAMS SLAMS

Table 3 (cont.)

_______________________________________________________________________ 14 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite and Monitoring Information (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Address/AQS Site # 44201 42101 42602 42401 88101 81102

Shasta County / CBSA: Redding Metropolitan Statistical Area

Anderson-North Street Site Type: Gnrl HConc 2220 North Street, Anderson Monitoring Obj.: NAAQS NAAQS
060890007 Monitoring Purp.: StateD StateD Monitor Type: SLAMS SLAMS

Lassen Volcanic Natl Park-Manzanita Lake Site Type: Gnrl
060893003 Monitoring Obj.: NAAQS Monitoring Purp.: StateD

Monitor Type: SLAMS

Redding-Health Department Roof*** Site Type: Gnrl HConc Gnrl 2630 Hospital Lane, Redding Monitoring Obj.: NAAQS NAAQS NAAQS
060890004 Monitoring Purp.: StateD StateD StateD Monitor Type: SLAMS SLAMS SLAMS

Shasta Lake-13791 Lake Blvd Site Type: HConc 13791 Lake Blvd, Shasta Lake Monitoring Obj.: NAAQS
060890009 Monitoring Purp.: StateD Monitor Type: SLAMS

Shasta Lake-4066 La Mesa Avenue Site Type: Gnrl 4066 La Mesa Avenue, Shasta Lake Monitoring Obj.: NAAQS
060890008 Monitoring Purp.: StateD Monitor Type: SLAMS

Solano County / CBSA: Vallejo-Fairfield Metropolitan Statistical Area

Vacaville-Merchant Street Site Type: HConc 650 Merchant Street, Vacaville Monitoring Obj.: NAAQS
060953001 Monitoring Purp.: StateD Monitor Type: SLAMS

Vacaville-Ulatis Drive Site Type: Gnrl 2012 Ulatis Drive, Vacaville Monitoring Obj.: NAAQS 060953003 o to g u p State Monitor Type: SLAMS

Sutter County / CBSA: Yuba City Metropolitan Statistical Area

Sutter Buttes-S Buttes Site Type: HConc/Trans
061010004 Monitoring Obj.: NAAQS Monitoring Purp.: AgBn

Monitor Type: SLAMS

Yuba City-Almond Street Site Type: HConc Gnrl HConc HConc 773 Almond Street, Yuba City Monitoring Obj.: NAAQS NAAQS NAAQS NAAQS
061010003 Monitoring Purp.: StateD/AgBn StateD StateD StateD Monitor Type: SLAMS SLAMS SLAMS SLAMS

Tehama County / CBSA: Red Bluff Micropolitan Statistical Area

Red Bluff-Main Street Site Type: (Gnrl) 301 S Main Street, Red Bluff Monitoring Obj.: (NAAQS)
061030006 Monitoring Purp.: (RConc) Monitor Type: (SLAMS)

Red Bluff-Oak Street Site Type: Gnrl 502 Oak Street, Red Bluff Monitoring Obj.: NAAQS
061030005 Monitoring Purp.: StateD Monitor Type: SLAMS

Red Bluff-Messer Drive Site Type: Gnrl 700 Messer Drive, Red Bluff Monitoring Obj.: NAAQS
061030002 Monitoring Purp.: StateD Monitor Type: SLAMS

Tuscan Butte Site Type: Gnrl/Trans
061030004 Monitoring Obj.: NAAQS Monitoring Purp.: StateD

Monitor Type: SLAMS

Table 3 (cont.)

_______________________________________________________________________ 15 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite and Monitoring Information (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Address/AQS Site # 44201 42101 42602 42401 88101 81102

Yolo County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area

Davis-UCD Campus Site Type: Gnrl Gnrl
061130004 Monitoring Obj.: NAAQS NAAQS Monitoring Purp.: StateD/AgBn StateD

Monitor Type: SLAMS SLAMS

West Sacramento-15th Street Site Type: Gnrl 132 15th Street, West Sacramento Monitoring Obj.: NAAQS
061132001 Monitoring Purp.: StateD Monitor Type: SLAMS

Woodland-Gibson Road Site Type: Gnrl PopEx Gnrl 41929 E Gibson Road, Woodland Monitoring Obj.: NAAQS NAAQS NAAQS
061131003 Monitoring Purp.: StateD StateD StateD/AgBn Monitor Type: SLAMS SLAMS SLAMS

N otes: This table only lists sites and monitors that have reported data in 2013 . Lead monitors are not included in this list because ther e is no lead monitoring in the areas included in this report

. After a county name, the table lists the U.S. O ffice of Management and Budget's Core

- Based Statistical Area (CBSA) that includes the county. The term CBSA includes both Metropolitan Statistical Areas and Micropolitan Statistical Areas. A Metropolitan Statistical Area has at least one urban area with a population of 50,000 or more. A Micropolitan Statistical Area has at least one urban area with a population of 10,000 to less than 50,000.

* Monitoring information inside a parenthesis ( ) in a PM column denotes that a continuous PM FEM monitor is locat ed at the site. Monitoring information without a parenthesis reflects the filter

- based PM FRM monitor

.

**The filter

- based PM10 FRM monitors at the Middletown, Glenbrook and Lakeport sites located in Lake County are reporting PM10 data in local conditions (i.e., 85101) and not in standard temperature and pressure (i.e., 81102).

***In addition to the Redding

- Health Department site (060890004), there are also the Redding

- Toyon and Redding

- Buckeye sites located in the City of Redding. The Redding

- Toyon and Redding

- Buckeye sites are non

- regulatory sites.

_______________________________________________________________________ 16 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaCodes used in Table 3

ExDwn Extreme downwind HConc Highest concentration MaxO3 Max ozone concentration MaxEm Max precursor emmissions impact PopEx Population Exposure Sourc Source oriented UpWin Upwind background Gnrl General/Background Trans Regional transport Welf Welfare related impacts QA Quality Assurance Other Other

Federal Monitoring Objectives PublicR Provide air pollution data to public in a timely manner NAAQS NAAQS comparison RSupport Research support

EHConc Monitoring at expected high concentration sites relative to California Ambient Air Quality Standards RConc Representative concentrations AgBn Support agricultural/prescribed burn decisions ResBn Support residential burn program Trnds Trends analysis StateD Support State area designation SIPMain State Implementation Plan (SIP) maintance requirement GAMP Geyser Air Monitoring Program

Monitor Types Impr Improve Indx Index site Indus Industrial NATTS NATTS NonEPA Non-EPA federal NonReg Non-regulatory PAMS PAMS NCore Proposed Ncore QAcoll QA collocated SLAMS SLAMS SPM Special purpose SupSP Supplemental speciation TrnSP Trends speciation Tribal Tribal monitors UnPAMS Unofficial PAMS Monitoring Purposes Site Types

_______________________________________________________________________ 17 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 4. Additional Information about the Monitors

U.S. EPA regulations require that the annual network p lan list specific additional information about the monitors that ch aracterize the nature and location of the monitoring . Table 4 lists the spatial scale s , sampling methods , method codes, parameter occurrence codes (POC) and start dates of the monitors that are included in this repo rt. Also included in Table 4 are the ge ographical coordinates of the monitoring sites. N ote that the continuous PM FEM monitors are listed in parenthesis in the PM columns in Table 4. At the end of Table 4, the codes used for the spatial scales, sampling methods, and method codes are defined as well

as a brief explanation of the POC

. The regulations also require that the annual network plan list the laboratory analysis met hods of the monitors. However, there is no separate analysis method for the gaseous monitors and continuous PM monitors

. F or the filter

- based PM monitors, only simple mass weighing is done. Moreover

, the regulations requir e that the network plan include distance from road information

, groundcover of the monitoring sites, probe heights of the monitoring ins truments, materials used for monitoring , and distance from obstructions information

.

The monitoring information for groundcover, distance from road/obstruction, probe heights and monitoring instrument/material is not included at this time. Previous network plans included this information; h owever, U.S. EPA determined that some of the information was inadequate and needs to be updated. For this
reason, U.S. EPA, ARB, districts, and a contractor are in the process of developi ng a statewide database to collect and store current site and monitoring information for all of the monitoring sites in California

. Once this database is complete

, which is anticipated to be available for use in 201 5

, this required site and monitoring information will be included in the ARB ne twork plan

. In the interim, older information can be viewed via ARB’s site surveys at: www.arb.ca.gov/qaweb/site.php

. Finally, additional information on continuous PM 2.5 non

- FEM monitors is provided

on page 26 and in Table 5.

_______________________________________________________________________ 18 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 4 Additional Information about the Monitors (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Geographical Coordinates/AQS Site # 44201 42101 42602 42401 88101 81102

LAKE COUNTY AIR BASIN
Lake County / CBSA: Clearlake Micropolitan Statistical Area Middletown-Anderson Springs Road** Spatial Scale: NGH 38.7744, -122.6994 Samp. Method: SCH, XG
060333010 Mthd. Code/POC: 098 / 1 Start Date: 1-1-2005

Glenbrook-High Valley Road** Spatial Scale: NGH 38.8502, -122.7361 Samp. Method: SCH, XG
060333011 Mthd. Code/POC: 098 / 1 Start Date: 1-1-2005

Lakeport-Lakeport Blvd** Spatial Scale: URB URB URB 39.0330, -122.9219 Samp. Method: UV SCH SCH
060333001 Mthd. Code/POC: 087 / 1 117 / 1 098 / 2 Start Date: 1-1-1980 1-1-1999 4-1-2001

LAKE TAHOE AIR BASIN
El Dorado County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area South Lake Tahoe-Sandy Way Spatial Scale: (NGH) 38.9450, -119.9703 Samp. Method: (BAM)
060170011 Mthd. Code/POC: (122 / 2) Start Date: (6-1-2001)

MOJAVE DESERT AIR BASIN
Kern County / CBSA: Bakersfield Metropolitan Statistical Area Canebrake-3147 Highway 178 Spatial Scale: REG 35.7277, -118.1393 Samp. Method: SI
060290017 Mthd. Code/POC: 141 / 1 Start Date: 1/1/2009

Mojave-923 Poole Street Spatial Scale: REG (NGH) (REG) 35.0503, -118.1478 Samp. Method: UV (BAM) (BAM)
060290011 Mthd. Code/POC: 087 / 1 (170 / 3) (122 / 3) Start Date: 8-1-1993 (4-1-2011) (4-1-2011)

Ridgecrest-100 West California Avenue Spatial Scale: NGH NGH 35.6211, -117.6731 Samp. Method: SI SI
060290015 Mthd. Code/POC: 118 / 1 063 / 1 Start Date: 6-1-1999 12-15-1999

Los Angeles County / CBSA: Los Angeles-Long Beach-Anahiem Metropolitan Statistical Area

Lancaster-43301 Division Street Spatial Scale: MID MID MID NGH (NGH) 34.6713, -118.1305 Samp. Method: UV IR CL SQ (BAM)
060379033 Mthd. Code/POC: 087 / 1 093 / 1 099 / 1 117 / 1 (122 / 2) Start Date: 11-1-2001 11-1-2001 11-1-2001 11-1-2001 (11-1-01)

Riverside County / CBSA: Riverside-San Bernardino-Ontario Metropolitan Statistical Area Blythe-445 W Murphy Street Spatial Scale: NGH 33.6119, -114.6000 Samp. Method: UV 060659003 Mthd. Code/POC: 087 / 1 Start Date: 5-1-2003

San Bernardino County / CBSA: Riverside-San Bernardino-Ontario Metropolitan Statistical Area

Barstow-200 E Buena Vista Road Spatial Scale: NGH NGH NGH (NGH) 34.8938, -117.0244 Samp. Method: UV IR CL (BAM)
060710001 Mthd. Code/POC: 087 / 1 093 / 1 099 / 1 (122/ 1) Start Date: 1-1-1974 1-1-1973 1-1-1973 (1-1-2014)

Hesperia-Olive Street Spatial Scale: NGH (NGH) 34.4158, -117.2861 Samp. Method: UV (BAM)
060714001 Mthd. Code/POC: 087 / 1 (122/1) Start Date: 1-1-1980 (1-1-2014)

_______________________________________________________________________ 19 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 4 (cont.) Additional Information about the Monitors (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Geographical Coordinates/AQS Site # 44201 42101 42602 42401 88101 81102

Joshua Tree National Mont.-Black Rock Spatial Scale: REG 34.0694, -116.3888 Samp. Method: UV 060719002 Mthd. Code/POC: 047 / 1 Start Date: 10/1/1993

Lucerne Valley-Middle School Spatial Scale: NGH 34.4103, -116.9067 Samp. Method: SI
060710013 Mthd. Code/POC: 063 / 1 Start Date: 6-1-1989

Phelan-Beekley and Phelan Roads Spatial Scale: NGH 34.4250, -117.5897 Samp. Method: UV 060710012 Mthd. Code/POC: 087 / 1 Start Date: 7-1-1987

Trona-Athol and Telescope Spatial Scale: REG NGH REG (NGH) 35.7744, -117.3722 Samp. Method: UV CL FL (BAM)
060711234 Mthd. Code/POC: 087 / 1 099 / 1 077 / 1 (122/ 2) Start Date: 4-1-1997 4-1-1997 4-1-1997 (1-1-2013)

Victorville-14036 Park Avenue Spatial Scale: NGH NGH NGH NGH NGH (NGH) 34.5122, -117.3250 Samp. Method: UV IR CL FL SQ (BAM)
060710306 Mthd. Code/POC: 087 / 1 093 / 1 099 / 1 077 / 1 117 / 1 (122 / 2) Start Date: 1-1-2000 1-1-2000 1-1-2000 1/1/2000 1-1-2000 (1-1-2013)

MOUNTAIN COUNTIES AIR BASIN
Amador County / Not in a CBSA

Jackson-201 Clinton Road Spatial Scale: URB 38.3427, -120.7644 Samp. Method: UV 060050002 Mthd. Code/POC: 087 / 1 Start Date: 5-1-1992

Calaveras County / Not in a CBSA

San Andreas-501 Gold Strike Road Spatial Scale: REG (REG) REG 38.2019, -120.6802 Samp. Method: UV (BAM) SI
060090001 Mthd. Code/POC: 087 / 1 (170 / 3) 063 / 1 Start Date: 5-1-1994 (6-15-2010) 4-1-1994

El Dorado County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area Cool-Highway 193 Spatial Scale: REG 38.8906, -121.0000 Samp. Method: UV 060170020 Mthd. Code/POC: 087 / 1 Start Date: 6-1-1996

Echo Summit Spatial Scale: REG 38.8117, -120.0331 Samp. Method: UV 060170012 Mthd. Code/POC: 087 / 1 Start Date: 5-7-2006

Placerville-Gold Nugget Way Spatial Scale: REG 38.7247, -120.8219 Samp. Method: UV 060170010 Mthd. Code/POC: 087 / 1 Start Date: 2-1-1992

Mariposa County / Not in a CBSA Jerseydale-6440 Jerseydale Spatial Scale: REG 37.5466, -119.8416 Samp. Method: UV 060430006 Mthd. Code/POC: 087 / 1 Start Date: 7-1-1995

Yosemite National Park-Turtleback Dome Spatial Scale: REG 37.7133, -119.7058 Samp. Method: UV 060430003 Mthd. Code/POC: 047 / 1 Start Date: 11-1-1988

Yosemite Village-Visitor Center Spatial Scale: NGH 37.7486, -119.5869 Samp. Method: SI
060431001 Mthd. Code/POC: 063 / 2 Start Date: 1-28-1989

_______________________________________________________________________ 20 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 4 (cont.) Additional Information about the Monitors (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Geographical Coordinates/AQS Site # 44201 42101 42602 42401 88101 81102

Nevada County / CBSA: Truckee-Grass Valley Micropolitan Statistical Area Grass Valley-Litton Building Spatial Scale: URB NGH 39.2336, -121.0555 Samp. Method: UV SCH
060570005 Mthd. Code/POC: 087 / 1 117 / 1 Start Date: 6-1-1993 12-30-98

Truckee-Fire Station Spatial Scale: NGH 39.3274, -120.1847 Samp. Method: SQ
060571001 Mthd. Code/POC: 118 / 1 Start Date: 3-31-99

White Cloud Mountain Spatial Scale: REG 39.3181, -120.8456 Samp. Method: UV 060570007 Mthd. Code/POC: 087 / 1 Start Date: 6-1-1995

Placer County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area Colfax-City Hall Spatial Scale: URB NGH 39.0997, -120.9541 Samp. Method: UV SI
060610004 Mthd. Code/POC: 087 / 1 063 / 1 Start Date: 1-1-1992 1-1-2012

Plumas County / Not in a CBSA Portola-420 N Gulling St Spatial Scale: NGH 39.8133, -120.4707 Samp. Method: SCH
060631010 Mthd. Code/POC: 118 / 1 Start Date: 1-18-07

Quincy-N Church Street Spatial Scale: NGH 39.9397, -120.9441 Samp. Method: SQ
060631006 Mthd. Code/POC: 118 / 1 Start Date: 3-26-99

Tuolumne County / CBSA: Phoenix Lake-Cedar Ridge Micropolitan Statistical Area

Sonora-Barretta Street Spatial Scale: NGH 37.9819, -120.3786 Samp. Method: UV 061090005 Mthd. Code/POC: 087 / 1 Start Date: 7-1-1992

NORTH COAST AIR BASIN Mendocino County / CBSA: Ukiah Micropolitan Statistical Area Fort Bragg-Dana Street Spatial Scale: (NGH) 39.4373, -123.7877 Samp. Method: (BAM)
060450010 Mthd. Code/POC: (122 / 1) Start Date: (8-17-2011)

Ukiah-County Library Spatial Scale: (NGH) 39.1511, -123.2066 Samp. Method: (BAM)
060450006 Mthd. Code/POC: (170 / 3) Start Date: (12-31-2008)

Ukiah-East Gobbi Street Spatial Scale: URB 39.1447, -123.2002 Samp. Method: UV 060450008 Mthd. Code/POC: 087 / 1 Start Date: 8-1-1992

Willits-125 East Commercial Street Spatial Scale: (NGH) 39.4118, -123.3528 Samp. Method: (BAM)
060452002 Mthd. Code/POC: (170 / 3) Start Date: (9-15-2009)

Sonoma County / CBSA: Santa Rosa Metropolitan Statistical Area Cloverdale-100 Washington Street Spatial Scale: NGH 38.8047, -123.0177 Samp. Method: SI
060970001 Mthd. Code/POC: 063 / 2 Start Date: 1-1-1990

Guerneville-Church and 1st Spatial Scale: NGH 38.5016, -122.9977 Samp. Method: SI
060973002 Mthd. Code/POC: 063 / 1 Start Date: 4-1-1990

Table 4 (cont.)

_______________________________________________________________________ 21 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaAdditional Information about the Monitors (Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Geographical Coordinates/AQS Site # 44201 42101 42602 42401 88101 81102

Healdsburg-133 Matheson Street Spatial Scale: NGH 38.6111, -122.8686 Samp. Method: SI
060970002 Mthd. Code/POC: 063 / 2 Start Date: 5-21-1988

Healdsburg-Municipal Airport Spatial Scale: URB 38.6536, -122.9005 Samp. Method: UV 060971003 Mthd. Code/POC: 087 / 1 Start Date: 6-1-1991

NORTHEAST PLATEAU AIR BASIN
Siskiyou County / Not in a CBSA

Yreka-Foothill Drive Spatial Scale: NGH NGH NGH 41.7267, -122.6336 Samp. Method: UV SQ SI
060932001 Mthd. Code/POC: 087 / 1 117 / 1 063 / 2 Start Date: 1-1-1981 8-21-2008 1-1-1988

SACRAMENTO VALLEY AIR BASIN
Butte County / CBSA: Chico Metropolitan Statistical Area

Chico-East Spatial Scale: URB NGH NGH NGH NGH 39.7616, -121.8405 Samp. Method: UV IR CL SCH SI
060070008 Mthd. Code/POC: 087 / 1 593 / 1 099 / 3 118 / 1 063 / 1 Start Date: 6-1-2012 6-1-2012 6-8-2012 4-27-12 5-27-2012

Paradise-4405 Airport Road Spatial Scale: REG 39.7141, -121.6177 Samp. Method: UV 060070007 Mthd. Code/POC: 087 / 1 Start Date: 5-1-2000

Colusa County / Not in a CBSA

Colusa-Sunrise Blvd Spatial Scale: REG NGH REG 39.1888, -121.9980 Samp. Method: UV SQ SI
060111002 Mthd. Code/POC: 087 / 1 118 / 1 063 / 2 Start Date: 7-1-1996 12-16-98 5-1-1988

Glenn County / Not in a CBSA

Willows-Colusa Street Spatial Scale: URB (REG) 39.5172, -122.1897 Samp. Method: UV (BAM)
060210003 Mthd. Code/POC: 087 / 1 (122/1) Start Date: 9-13-2006 (10-1-2013)

Placer County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area

Auburn-Atwood Spatial Scale: URB (NGH) 38.9356, -121.0995 Samp. Method: UV (BAM)
060610003 Mthd. Code/POC: 087 / 1 (170 / 1) Start Date: 6-24-2011 (6-24-2011)

Auburn-B Avenue Spatial Scale: NGH 38.9394, -121.1055 Samp. Method: SI
060610002 Mthd. Code/POC: 063 / 1 Start Date: 1-1-2012

Lincoln-1st Street Spatial Scale: URB 38.8856, -121.3020 Samp. Method: UV 060612002 Mthd. Code/POC: 087 / 1 Start Date: 12-21-2012

Tahoe City Spatial Scale: URB 39.1660, -120.1488 Samp. Method: UV 060611004 Mthd. Code/POC: 087 / 1 Start Date: 11-1-2013

Roseville-N Sunrise Blvd Spatial Scale: URB NGH NGH URB 38.7461, -121.2647 Samp. Method: UV CL SCH SI
060610006 Mthd. Code/POC: 087 / 1 099 / 1 117 / 1 063 /1 Start Date: 1-13-1993 1-13-1993 12-31-98 1-13-1993

Table 4 (cont.) Additional Information about the Monitors

_______________________________________________________________________ 22 Annual Monitoring Network Report for Twenty

- three Districts in California(Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Geographical Coordinates/AQS Site # 44201 42101 42602 42401 88101 81102

Shasta County / CBSA: Redding Metropolitan Statistical Area

Anderson-North Street Spatial Scale: NGH NGH 40.4531, -122.2986 Samp. Method: UV SI
060890007 Mthd. Code/POC: 087 / 1 063 / 1 Start Date: 5-1-1993 5-1-1993

Lassen Volcanic Natl Park-Manzanita Lake Spatial Scale: REG 40.5372, -121.5764 Samp. Method: UV 060893003 Mthd. Code/POC: 047 / 1 Start Date: 11-1-1987

Redding-Health Department Roof*** Spatial Scale: NGH NGH NGH 40.5514, -122.3808 Samp. Method: UV SCH SI
060890004 Mthd. Code/POC: 087 / 1 117 / 1 063 / 2 Start Date: 5-1-1990 12-19-1998 1-1-1988

Shasta Lake-13791 Lake Blvd Spatial Scale: NGH 40.6894, -122.4011 Samp. Method: UV 060890009 Mthd. Code/POC: 087 / 1 Start Date: 4-1-2009

Shasta Lake-4066 La Mesa Avenue Spatial Scale: REG 40.6775, -122.3733 Samp. Method: SI
060890008 Mthd. Code/POC: 063 / 1 Start Date: 1-1-2004

Solano County / CBSA: Vallejo-Fairfield Metropolitan Statistical Area

Vacaville-Merchant Street Spatial Scale: URB 38.3516, -121.9933 Samp. Method: SI
060953001 Mthd. Code/POC: 063 / 2 Start Date: 1-1-1988

Vacaville-Ulatis Drive Spatial Scale: URB 38.3583, -121.9500 Samp. Method: UV 060953003 Mthd. Code/POC: 087 / 1 Start Date: 7-21-2003

Sutter County / CBSA: Yuba City Metropolitan Statistical Area

Sutter Buttes-S Buttes Spatial Scale: REG 39.1583, -121.7500 Samp. Method: UV 061010004 Mthd. Code/POC: 087 / 1 Start Date: 5-1-1993

Yuba City-Almond Street Spatial Scale: URB NGH NGH NGH 39.1388, -121.6191 Samp. Method: UV CL SCH SI
061010003 Mthd. Code/POC: 087 / 1 099 / 1 118 / 1 063 / 1 Start Date: 10-1-1989 10-1-1989 12-19-98 12-1-1989

Tehama County / CBSA: Red Bluff Micropolitan Statistical Area

Red Bluff-Main Street Spatial Scale: (NGH) 40.1678, -122.2271 Samp. Method: (BAM)
061030006 Mthd. Code/POC: (170 / 3) Start Date: (1-1-2009)

Red Bluff-Oak Street Spatial Scale: URB 40.1749, -122.2366 Samp. Method: UV 061030005 Mthd. Code/POC: 087 / 1 Start Date: 2-1-1996

Red Bluff-Messer Drive Spatial Scale: NGH 40.1638, -122.2213 Samp. Method: SI
061030002 Mthd. Code/POC: 063 / 2 Start Date: 1-1-1998

Tuscan Butte Spatial Scale: REG 40.2622, -122.0928 Samp. Method: UV 061030004 Mthd. Code/POC: 087 / 1 Start Date: 6-1-1995

Table 4 (cont.) Additional Information about the Monitors

_______________________________________________________________________ 23 Annual Monitoring Network Report for Twenty

- three Districts in California(Monitors reporting data in 201 3 )

OZONE CO NO2 SO2 PM2.5* PM10* Station/Geographical Coordinates/AQS Site # 44201 42101 42602 42401 88101 81102

Yolo County / CBSA: Sacramento-Arden-Arcade-Roseville Metropolitan Statistical Area

Davis-UCD Campus Spatial Scale: URB NGH 38.5352, -121.7730 Samp. Method: UV CL
061130004 Mthd. Code/POC: 087 / 1 099 / 1 Start Date: 9-1-1987 5-21-1996

West Sacramento-15th Street Spatial Scale: NGH 38.5713, -121.5258 Samp. Method: SI
061132001 Mthd. Code/POC: 063 / 1 Start Date: 9-1-1990

Woodland-Gibson Road Spatial Scale: URB NGH URB 38.6605, -121.7305 Samp. Method: UV SQ SI
061131003 Mthd. Code/POC: 087 / 1 118 / 1 063 / 1 Start Date: 5-27-1998 1-9-1999 10-26-1998

N otes: This table only lists sites and monitors that have reported data in 2013. Lead monitors are not included in this list because there is no lead monitoring in the areas included in this report.

After a county name, the table lists the U.S. Office of Management and Budget's Core

- Based Statistical Area (CBSA) that includes the county. The term CBSA includes both Metropolitan Statistical Areas and Micropolitan S tatistical Areas. A Metropolitan Statistical Area has at least one urban area with a population of 50,000 or more. A Micropolitan Statistical Area has at least one urban area with a population of 10,000 to less than 50,000.

*Monitoring information insid e a parenthesis ( ) in a PM column denotes that a continuous PM FEM monitor is located at the site. Monitoring information without a parenthesis reflects the filter

- based PM FRM monitor.

**The filter

- based PM10 FRM monitors at the Middletown, Glenbrook a nd Lakeport sites located in Lake County are reporting PM10 data in local conditions (i.e., 85101) and not in standard temperature and pressure (i.e., 81102).

***In addition to the Redding

- Health Department site (060890004), there are also the Redding

- T oyon and Redding

- Buckeye sites located in the City of Redding. The Redding

- Toyon and Redding

- Buckeye sites are non

- regulatory sites.

_______________________________________________________________________ 24 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaCodes used in Table 4

MIC Microscale MID Middle Scale NGH Neighborhood Scale URB Urban Scale REG Regional Scale

CL Chemiluminescent
FL Fluoresecence IR Nondispersive infrared SCH Low volume single channel sampler, size selective inlet SI High volume sampler, size selective inlet SQ Low volume sequential sampler, size selective inlet UV Ultraviolet absorption XG X-ray fluorescence BAM Beta Attenuation Monitor TEOM Tapered Element Oscillating Microbalance Monitor

Method codes

047 Thermo Electron/Thermo Environmental Instr., Inc. Model 49, 49C, & 49i Ozone analyzer
063 Anderson-General Metal Works Model 1200 High Volume sampler
077 Advance Pollution Instruments Model 100 SO2 analyzer
087 Teledyne -Advance Pollution Instuments Model 400 or T400 Ozone analyzer
093 Advance Pollution Instruments Model 300, GFC CO analyzer
098 Rupprecht & Patashnick Partisol Model 2000 Air Sampler
099 Advance Pollution Instruments Model 200A NO analyzer
117 Rupprecht & Patashnick Model 2000 PM2.5 Air Sampler
118 Rupprecht & Patashnick Plus Model 2025PM SEQ PM2.5 Air sampler
122 Met One BAM/GBAM Model 1020 Monitor
141 Tisch EnvironmentalModel TE-6070 PM10 High-Volume Sampler
170 Met One BAM Model 1020 Monitor PM2.5 VSCC FEM
593 Advance Pollution Instruments Model 300 EU, GFC CO analyzer
731 Met One BAM-1020 Monitor W/PM2.5 SCC Sampling methods Spatial scales

Note s : POC stands for parameter occurrence code. This code is used to differentiate betwe en the numbers of physical monitors at a site that measure for the same pollutant. For example, the PM 10 monitors at a collocated PM 10 site will use different POCs to differentiate b etween the primary and quality assurance PM 10 monitors.

_______________________________________________________________________ 25 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaInformation on t he c ontinuous PM 2.5 non

- FEM m onitors included in this p lan

The CFR requires that monitors are FRM , FEM or ARM and meet certain siting criteria in order for the data to be used for NAAQS comparisons . While all continuous PM 10 monitors included in this rep ort are FEM monitors, there are some continuous PM 2.5 monitors that are non

- FEMs. Table 5 lists the continuous PM 2.5 non

- FEM monitoring sites that are covered in the geographical scope of this report. The continuous PM 2.5 data repo rt ed from these non

- FEM monitors are excluded from NAAQS comparison. However, these non

- FEM monitors are California Approved Samplers (CAS) and the data are used in AirNow for A ir Q uality I ndex reporting and are also used for State designations.

Table 5 Monitoring Sites Operat ing PM 2.5 Non

- FEM monitors

Site Name AQS Number
Chester

- 222 1st Avenue 060631007
Chico

- East 060070008
Colfax

- City Hall 060610004
Colusa

- Sunrise Blvd 060111002

Davis

- UCD Campus 061130004 Grass Valley

- Litton Building 060570005 Gridley

- Cowee Avenue 06 0074001
Lincoln

- 1st Street 060612002
Paradise

- 6701 Clark Road 060072002
Portola

- 420 N Gulling St 060631010 Quincy

- N Church Street 060631006
Roseville

- N Sunrise Blvd 060610006 Tahoe City 060611004
Truckee

- Fire Station 060571001
Willows

- E Laurel Stre et 060210003 Yosemite Village

- Visitor Center 060431001 Yuba City

- Almond Street 061010003

_______________________________________________________________________ 26 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 5

. Federal Minimum Monitoring Requirements

For most pollutants, U.S. EPA has established minimum monitoring requirements. These requirements are usually based on the CBSA along with considerations of population, emissions, or current air quality. Minimum monitoring requirements for ozone, PM 2.5 , PM 10 , PM

- coarse, NO 2 , SO 2 , lead and chemical speciation will be discussed in this section. In contrast, there are also monitoring requirements that apply to an entire Primary Quality Assurance Organization ( PQAO ) or State or are based on ozone nonattainment classification, which wi ll be discussed in the next section.

Federal O zone, PM 10 , and PM 2.5 Monitoring Req uirements

Minimum monitoring requirements are specified in federal regulations (Appendix D of Title 40, Part 58 of the CFR). The requirements are based on the population of the CBSA and the severity of the air quality problem, as measured by the design v alue. Table 6 summarizes the required and existing ozone, PM 2.5 and PM 10 monitors for the nine CBSAs covered in this report. In all cases, sufficient monitoring exists and no additional monitoring is required.

To provide a broader picture of California, Figure 2 and Table 6a provide a complete list of the CBSA s in California, including those covered in other district network plans. Note that ozone and PM monitoring are only required in Metropolitan areas and not in Micropolitan areas (Refer to detailed information on CBSA, Metropolitan and Micropolitan areas on page 10 of this report). Additional information on the ozone, PM 2.5 , continuous PM 2.5 and PM 10 monitoring requirements and compliance with federal re quirements can be found in Appendix B of this report.

Finally, f or PM 2.5 , the CFR also requires near roadway monitoring in CBSAs with a population of one million or more. Several CBSAs covered by this network plan have a sufficiently high population to require a near roadway PM 2.5 monitor. The requ ired monitors will be placed in the portion of the CBSA covered by districts preparing their own plan. For further information, refer to the following district plans:

• South Coast AQMD (Los Angeles

- Long Beach

- Anaheim and Riverside

- San Bernardino

- Ontario C BSAs)

• Sacramento Metropolitan AQMD (Sacramento

- Arden Arcade

- Roseville CBSA)

_______________________________________________________________________ 27 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 6 Numbers of Required and Existing Sites by Core Based Statistical Area ( CB SA) (CB SAs that include the twenty

- three air districts included in this report)

Core B ased Sta tistical Area (CB SA) Pop. Ozone PM2.5 PM10

Required Existing Required Existing Required Existing Required Existing

sites sites sites sites Cont. 1 Cont. sites sites

Bakersfield* 839,361 2 8 2 4 1 3 1

- 2 4

Chico 220,000 1 2 1 1 1 3 0 1

L os Angeles

- Long Beach

- Anaheim* 12,828,837 4 19 3 12 2 8 2

- 4 10

Redding 177,223 1 4 0 1 0 0 0 3

Riverside

- San Bernardino

Ontario* 4,224,851 3 21 3 10 2 8 6

- 10 17

Sacramento

Arden Arcade

Roseville* 2,149,127 2 17 3 6 2 11 2

- 4 11

Santa Rosa* 483,878 1 2 0 1 0 1 0

- 1 3

Vallejo

- Fairfield* 413,344 2 3 0 2 0 2 0

- 1 2

Yuba City 166,892 1 2 0 1 0 1 0 1

Notes: 2011

- 2013 air quality data was used in determining the number of required sites. In addition, the number of required sites includes both SLAMS and SP M monitors. This table excludes tribal monitoring sites. Population is based on year 2010 Census data.

*Parts of these CB SAs are included in the geographical scope of this report, and parts are within the geographical scope of reports being completed by the districts. The numbers of s ites listed

a re for the entire CBSA. Table 6 a shows the completed list of CB SAs in California.

1 Continuous refers to a continuous PM 2.5 monitor, i.e., one that measures hourly data. For this assessment, both continuous FEM and non

- FEM PM 2.5 monitors were counted for each CB SA.

_______________________________________________________________________ 28 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaFigure 2 M ap showing the Core

- Based Statistical Areas in California

Data Source: U.S. Census Bureau. Note: The Los Angeles

- Long Beach

- Santa Ana CBSA was reclassified by OMB to the Los Angeles

- Long Beach

- Anaheim CBSA in February 2013.

_______________________________________________________________________ 29 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 6 a Core

- Based Statistical Areas in California (Metro politan Areas)

CB SA Name County(ies) Included in the ARB plan? I ncluded in other District plan?

Bakersfield Kern Yes, Eastern Kern San Joaquin Vall ey Chico Butte Yes

-- El Centro Imperial No Imperial Fresno Fresno No San Joaquin Valley Hanford

- Corcoran Kings No San Joaquin Valley Los Angeles

- Long Beach

Anaheim Los Angeles and Yes, Antelope Valley South Coast Orange Madera Madera No San Joaquin Valley Merced Merced No San Joaquin Valley Modesto Stanislaus No San Joaquin Valley Napa Napa No Bay Area
Oxnard

- Thousand Oaks

Ventura Ventura No Ventura County

Redding Shasta Yes

--
Riverside

- San Bernardino

Ontario Riverside and Ye s, Mojave Desert South Coast San Bernardino

Sacramento

- Roseville

Arden Arcade El Dorado, Placer, Sacramento, and Yolo Yes, Placer County; Yolo

- Solano Sacramento Metropolitan

Salinas Monterey No Monterey Bay Unified San Diego

- Carlsbad San Diego No San Diego County

San Francisco

- Oakland

Hayward Alameda, Contra Costa, Marin, San Francisco, and San Mateo No Bay Area

San Jose

- Sunnyvale

- Santa Clara Santa Benito and Santa Clara No Bay Area

San Luis Obispo

- Paso Robles

- Arroyo Grand e San Luis Obispo No San Luis Obispo County

Santa Cruz

- Watsonville Santa Cruz No Monterey Bay Unified
Santa Maria

- Santa Barbara Santa Barbara No Santa Barbara County

Santa Rosa Sonoma Yes, Northern Sonoma Bay Area Stockton

- Lodi San Joaquin No San Joaquin Valley Vallejo

- Fairfield Solano Yes, Yolo

- Solano Bay Area Visalia

- Porterville Tulare No San Joaquin Valley Yuba City Sutter and Yuba Yes

--

_______________________________________________________________________ 30 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 6 a (cont.) Core

- Based Statistical Areas in California (Micro politan Areas)

CBSA Name Coun ty(ies) Included in the ARB plan? Included in other District plan?

Bishop Inyo No Great Basin Unified
Clearlake Lake Yes

-- Crescent City Del Norte No North Coast Unified

Eureka

- Arcata

- Fortuna Humboldt No North Coast Unified
Phoenix Lake

- Cedar Ri dge Tuolumne Yes

-- Red Bluff Tehama Yes

--
Susanville Lassen Yes

--
Truckee

- Grass Valley Nevada Yes

-- Ukiah Mendocino Yes

--

Federal Near

- Road

, Area

- Wide and Susceptible Population NO 2 Monitoring Requirements

There are new federal requirement s for NO 2 near roadway monitors that are

a pplicable in California. However, none of the 23 districts covered in this report are required to deploy near roadway monitors. Near roadway monitors required for the Sacramento

- Arden

- Arcade

- Roseville CBSA are be ing addressed by the Sacramento Metropolitan District. Near roadway monitors required for the Riverside

- San Bernardino

- Ontario and Los Angeles

- Long Beach

- Anaheim CBSAs are being addressed by the South Coast District. Near roadway monitors required for th e San Diego

- Carlsbad

- San Marcos CBSA are being addressed by the San Diego County District. Near roadway monitors required for the Oxnard

Thousand Oaks

- Ventura CBSA are being addressed by the Ventura County District. Near roadway monitors required for the San Francisco

- Oakland

Fremont and San Jose

- Sunnyvale

- Santa Clara CBSAs are being addressed by the Bay Area District

, and near roadway monitors required in the Bakersfield, Fresno, Modesto, and Stockton CBSAs are being addressed by the San Joa quin Valley D istrict. All six of these districts are preparing separate network plans and/or separate documents related to the implementation of the NO 2 near roadway requirements. Table 7 lists the districts responsible for planning and implementing near

- road NO 2 mon itoring in California.

In addition, federal monitoring regulations also require that there must be NO 2 monitoring at a location of expected highest NO 2 concentration representing the neighborhood or larger spatial scales within each CBSA with a popul ation of 1,000,000 or greater. There are six CBSAs that meet the population criteria: Los Angeles

- Long Beach

- Anaheim , Riverside

- San Bernardino

- Ontario, San Diego

Carlsbad

- San Marcos, San Francisco

- Oakland

- Fremont, San Jose

- Sunnyvale

Santa Clara and Sacram ento

- Roseville

- Arden Arcade. Area

- wide NO 2 monitoring in the Los Angeles

- Long Beach

- Anaheim and Riverside

- San

_______________________________________________________________________ 31 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaBernardino

- Ontario CBSAs is being addresse d by the South Coast District. Area

- wide NO 2 monitoring in the San Diego

- Carlsbad

- San Marcos CBSA is being addressed by the San Diego County District. Area

- wide NO 2 monitoring in the San Francisco

- Oakland

- Fremont and San Jose

- Sunnyvale

- Santa Clara CBSAs is being addressed by the Bay Area District. Area

- wide NO 2 monitoring in the Sacramento

- Roseville

- Arden Arc ade CBSA is being addressed by the Sacramento Metropolitan District. There is no required NO 2 area

- wide monitoring for the CBSAs included in this network plan.

Table 7 Near

- Road NO 2 Monitoring Requirements in California

CBSA District Responsible for NO 2 Near

Road Monitoring Number of Required NO 2 Monitors

Bakersfield San Joaquin Valley 1

Fresno San Joaquin Valley 1

Los Angeles

- Long

Beach

- Anaheim South Coast 2

Modesto San Joaquin Valley 1

Oxnard

- Thousand

Oaks

- Ventura Ventura County 1

Riverside

- San

B ernardino

Ontario South Coast 2

Sacramento

Arden

- Arcade

Roseville Sacramento Metro 1

San Diego

Carlsbad

- San Marcos San Diego 2

San Francisco

Oakland

- Fremont Bay Area 2

San Jose

Sunnyvale

- Santa Clara Bay Area 1

Stockton San Joaquin Valley 1

Finally, federal regulations also require that NO 2 monitoring is conducted in 40 locations throughout the United States in selected areas to protect susceptible

_______________________________________________________________________ 32 Annual Monitoring Network Report for Twenty

- three Districts in Californiaand vulnerable populations. The locations of these areas are determined by each U.S. EPA Regional Admin istrator. In California, seven locations were selected to be part of the nationwide network, which includes San Diego, Oakland, Long Beach, Los Angeles, San Bernardino, Parlier, and Bakersfield. The selected monitoring locations are located in regions co vered by the San Diego, Bay Area and San Joaquin Valley D istrict network plans.

Federal CO and SO 2 Monitoring Requirements

Monitoring for carbon monoxide (CO) is only required at a select number of

near

- road monitoring sites, beginning in the year 2015 (and continuing through 2017) and will be addressed in future network plans by the implementing agencies. Regardless of the future implementation of the near

- roadway CO requirements, California has and continues to monitor for C O on a regional basis.

On June 2, 2010, the U.S. EPA published the final rule for the revised federal SO 2 standard which specifies the minimum number of sites at which state and local air agencies must deploy SO 2 monitors. The monitoring regulations require SO 2 monitors be placed in CBSAs based on a population weighted emissions index (PWEI) for the area. The PWEI of a CBSA is calculated by multiplying the latest available SO 2 emission data within each CBSA by the population of the CBSA and then divided by one million. The final rule requires:

• Three SO 2 monitors in CBSAs with PWEI values of one million or more;

• Two SO 2 monitors in CBSAs with PWEI values less than one million but greater than 100,000; and

• One SO 2 monitor in CBSAs with PWEI values greater than 5,000 but less than 100,000.

California has thirty

- five CBSAs with population ranging from 17,000 to more than 12 million people

. Table 8 lists the CBSAs in California that require SO 2 m onitoring. In addition, Table 8 shows that these CBSAs exceed federal monitoring requir ements for SO 2

. N one of the areas included in this report are required to monitor for SO 2

.

_______________________________________________________________________ 33 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 8 Minimum Monitoring Requirements for SO 2

CBSA County(ies) Population (2010) SO2 emission per CBSA (tpy) PWEI (Million persons tpy) Number of Required Moni tors Number of Active Monitors Number of Additional Monitors Needed

Los Angeles

Long Beach

Santa Ana Los Angeles and Orange 12,828,837 13,498 173,785 2 5 0

Riverside

- San

Bernardino

Ontario Riverside and San Bernardino 4,224,851 2,478 10,266 1 4 0

San Francisco

Oakland

Fremont Alameda, Contra Costa, San Francisco, San Mateo, and Marin 4,317,853 12,669 54,702 1 9 0

Federal Lead Monitoring Requirements

On December 14, 2010

, U.S. EPA finalized the rule for the revised federal le ad (Pb) standard, which also specifies the monitoring requirements for Pb. While the final rule maintains the airport monitoring threshold at 1.0 ton per year (tpy), the rule lowers the industrial source

- oriented monitoring threshold from 1.0 tpy to 0.5 t py. In addition, the final rule replaces the population

- based monitoring requirement with a requirement to monitor for Pb at urban NCore sites.

The U.S. EPA selected 15 airports for a one

- year study as part of the new Pb rule. Five airports are in Calif ornia: Palo Alto Airport, McClellan

- Palomar Airport, Reid

- Hillview Airport, Gillespie Field Airport, and San Carlos Airport. None of these airports fall within the geographical scope of this report. With respect to

source

- oriented monitoring for Pb, the only station ary sources in California subject to the 0.5 tpy threshold are located in the South Coast Air Basin. The South Coast annual network plan provides a description of their source

- oriented lead monitors. The areas covered in this network plan are not required to conduct source

- oriented lead monitoring.

Lastly, the final rule requires Pb monitoring at urban NCore sites. Urban NCore sites are those sites in a CBSA of 500,000 or more. Currently, there are six urban NCore sites in California, locate d in El Cajon, Fresno, Los Angeles, Riverside, Sacramento and San Jose . A seventh rural NCore site is located at White Mountain Research Station. None of these NCore sites are located in areas covered by this network plan. More information on NCore site s is provided in Section 6 of this report.

_______________________________________________________________________ 34 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaFederal PM

- C oarse (PM 10

- 2.5 ) Monitoring Requirements

The CFR requirement for coarse particulate matter monitoring is in Section 4.8, Appendix D of 40 CFR 58. PM

- coarse monitoring is required at NCore sites

. At the time this report was drafted, the six urban NCore sites currently monitored for PM

- co arse.

Federal PM 2.5 Chemical Speciation Trends Network (STN) Requirements

The requirements for PM 2.5 trends speciation monitoring is in Section 4.7.4, Appendix D of 40 CFR 58. Each state is required to conduct chemical speciation monitoring at sites designated to be part of the federal Speciation Trends Network (STN). At the time this report was drafted, and according to AQS, there are seven STN sites in California , which include Fresno

- Garland, Bakersfield

California Street, Rubidoux

- Mission Blvd., Sacramento

- Del Paso Manor, El Cajon, San Jose

- Jackson Street and Simi Valley. Each STN site monitored more th an 3 0 chemical speciation measurements. H owever, not all s ites collect the

same speciated compounds. None of these STN sites are located in areas covered by this network plan.

_______________________________________________________________________ 35 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 6. Federal Monitoring Requirement s at State

- level or by PQAO or Area

Certain p arts of 40 CFR 58 require that s tate and local agencies operate multi

- pollutant monitoring sites, meet PM collocation requirements, as well as monitor at sites that are considered background, transport, or highest (maximum) concentration sites. The rest of this Section discusses these req uirements.

Federal NCore Monitoring Requirements for California

On October 17, 2006, U.S. EPA issued amendments to the ambient air monitoring requirements for criteria pollutants. These amendments are codif ied in 40 CFR Parts 53 and 58. One of the most significant changes in the regulations was the requirement to establish a network of National Core (NCore) multi

- pollutant monitoring stations. NCore sites include neighborhood and urban scale measurements in metropolitan areas and rural areas. Sites ar e long term and sited away from direct emission sources that could impact the ability to detect area

- wide concentrations. These stations provide data on several pollutants at lower detection limits and replace the National Air Monitoring Station (NAMS) ne twork that had existed for many years.

Currently, in California, there are a total of seven monitoring sites that are part of the national NCore network. The seven NCore sites are listed in Table 9 along with the agency that operates the site. Note th at in February 2014, the San Diego Air Pol lution Control District temporary relocated the El Cajon site to a new location appr oximately 3.8 kilometers from its current location . This move is expected to last between 12

- 18 months due to co nstruction on the school ground near the monitoring station

. More information regarding the temporary relocation can be found in the 2014 San Diego network plan.

Table 9 NCore Monitoring in California

NCore Site Name NCore Type Agency Responsible for NCore Monitoring E l Cajon Urban San Diego Fresno

- Garland Urban ARB Los Angeles

- North Main Urban South Coast

Riverside

- Rubidoux Urban South Coast

Sacramento

- Del

Paso Manor Urban Sacramento Metro San Jose Urban Bay Area
White Mountain Research Station Rural Great Basin Unified

_______________________________________________________________________ 36 Annual Monitoring Network Report for Twenty

- three Districts in California6.1 Fed eral Collocation Requirements for the ARB PQAO

Appendix A of 40 CFR 58 includes requirements for collocation of samplers as part of quality checks for the PM 2.5 , continuous PM 2.5 , PM 10 , and lead (Pb) monitoring networks. The CFR contains separate collocation requirements for these monitors . The requirements are to be met for each primary quality assurance organization (PQAO). Four PQAOs exist in California, one each for the San Francisco Bay Area AQMD, San Diego County APCD, and South C oast AQMD, and one for the remainder of the State that is called the ARB PQAO.

**PM 2.5**  **Collocation Status**

For PM 2.5 , the CFR requires that for each type of manual PM 2.5 monitor, 15 percent of the sites within a PQAO have a collocated monitor of the same ty pe. Two types of manual PM 2.5 FRMs exist currently in the ARB PQAO. Collocation requirements apply to each method type. The types of manual PM 2.5 samplers

are the R&P Non

- sequential (117) and R&P Sequential (118). At the time this report was drafted, o ne collocation site is required for method 117 and three collocation sites are required for method 118.

For method 117, the collocation site is Victorville . T his site is operated by the Mojave Desert Air Quality Management District (MDAQMD) . B y the en d of 2014, MDAQMD is proposing to switch out one of the manual FRM monitors at the Victorville site to a continuous PM 2.5 FEM monitor

. Once this propo sal becomes fully implemented, the ARB PQAO will have to find a replacement site to collocate for this me thod type. ARB will reassess the collocation situation for this method type and coordinate with districts within the ARB PQAO to ensure that this collocation requirement continue s to be met

.
For method 118, the collocation sites are: Bakersfield

- Califo rnia, Fresno

- Garland, Sacrame nto

- Del Paso Manor and Truckee. When this report was drafted, there was only one proposed change to these four collocation sites

. The Northern Sierra Air Quality Management District (NSAQMD) proposed to relocate the collocate d PM 2.5 monitor from the Truckee site to the Portola site . The NSAQMD is currently requesting U.S. EPA approval for the relocation. Additional information regarding these proposals will be provided in the 2015 ARB network plan

.
In the ARB PQAO, Calexic o

- Ethel is the only site that operate s two PM 2.5 monitors that are of different method type. At this site, one monitor is a manual FRM (R&P

- method 118) and the other monitor is a manual FEM ( T hermo Scientific

- method 145)

. The FRM (method 118) is the prim ary monitor and the FEM (method 145) is the collocated monitor. Due to the different method type of the PM 2.5 monitors, ARB is waiting for further clarification from U.S. EPA on whether this type of monitor ing setup could be used as an additional collocat ion monitoring site. Table 10 summarizes the manual PM 2.5 collocation requirements in the ARB PQAO as well as the c ollocation sites by method type.

_______________________________________________________________________ 37 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 10 Collocation Requirements for Manual PM 2.5 Monitors

Method Code Number of Primary Monitors Number of Required Collocated

Monitors Number of Active Collocated

Monitors

117 8 1 1 118 * 2 2 3 4 (or 5)

Notes: Method 117 FRM (R&P non

- seq.): Victorville Method 118 FRM (R&P seq.): Bake rsfield, Fresno, Sacramento and Truckee

*The Calexico

- Ethel site ha s two filter PM 2.5 monitors of which have different methods. The primary PM 2.5 mon itor at this site is an R&P sequential monitor (method 118) and the quality assurance moni tor is a Thermo (method 145). Regardless of w hether this monitoring setup could be used for collocation purposes

, the ARB PQAO met collocation requirements for method 118.

The CFR also requires that for each continuous PM 2.5 fede ral equivalent method (FEM), 15 percent of the sites must be collocated, but that the first collocation moni tor is an FRM, the second an FEM, and so on alternating FRM with FEM as additional collocation monitors are required. At the time this report was drafted, 3 4 sites in the ARB PQAO operate continuous PM 2.5 FEM monitors representing three method types. The three methods are the Met

- One BAM (170), Thermo Scientific TEOM ( 181) and Grimm (195) with 3 2 sites in the ARB PQAO operating method 170 , and one site each operating method 181 and 195.

For method 170, the 32 sites in the ARB PQAO require that five site s are collocated of which the first, third, and fifth collocations are between an FEM/FRM and the second and fourth collocations ar e between an FEM/FEM. At the time this report was drafted, t here are two FEM/FRM si te s in the ARB PQAO : Modesto and Salinas

. To me et this FEM/FRM requirement, one additional FEM/FRM collocation site is needed in the ARB PQAO. ARB is proposing to add a PM 2.5 FRM monitor to the Madera site to co llocate with the existing continuous PM 2.5 FEM monitor. Once this proposed plan bec omes implemented at the Madera site , the ARB PQAO would meet the FEM/FRM collocation requirement. In regards to the FEM/FEM collocation requirement, there are currently two FEM/FEM sites in the ARB PQAO: Stockton

- Hazelton and Simi Valley

. The Stockton

- Ha zelton site was the e xisting FEM/FEM site and t he Simi Valley site recently became an FEM/FEM site in March of 2014. The ARB PQAO will not require an additional FEM/FEM site in the PQAO until th e continuous PM 2.5 network which utilizes method 170 reaches 37 sites.

For method 181 , the one site utilizing this method in the ARB PQAO is the Keeler site located in Inyo County. The Great Basin Unified District discontinue d one of

_______________________________________________________________________ 38 Annual Monitoring Network Report for Twenty

- three Districts in Californiathe two PM 2.5 FRM monitors at the Keeler in July 2013 and re

- designate d the conti nuous PM 2.5 FEM monitor as the primary monitor at this site . The Keeler site currently me e t s collocation requirements.

For method 195, the one site utilizing this method in the ARB PQAO is the Humboldt Hill site located in the City of Eureka. T he North Coast Unified District discontinue d the PM 2.5 FRM at the Eureka

- I Street site and add ed it to the Humboldt Hill site , collocating with the FEM Grimm monitor (195) . The Humboldt Hill site currently me e t s collocation requirements

. However, the District is planning to designate the PM 2.5 FRM monitor at Humboldt Hill as the primary monitor and re

- designate the Grimm monitor as the quality assurance monitor at this site. In addition, the District is planning on asking U.S. EPA approval via a waiver to exclude the Grimm data at this site from NAAQS comparison. ARB is waiting for the District’s plan in writing and U.S. EPA’s response s to the plan. More detail ed information regarding this p roposed network change will be provided in the 2015 ARB network plan. T able 11 summarizes the collocation requirements for continuous PM 2.5 FEM in the ARB PQAO

.

Table 11 Collocation Requirements for continuous PM 2.5 FEM

Method

Code Number of Primary Monitors Number of Required Collocated

Monitors Number of Active Collocate d FRM Monitors Number of Active Collocated FEM Monitors (same method designation as primary)

170 * 32 5 2 (need 1 ) 2 181 1 1 1 0 195 1 1 1 0

Notes: FEM/FRM site s : Humboldt Hill, Modesto, Keeler and Salinas FEM/FEM site: Stockton and Simi Valley

*The ARB proposed to add a PM 2.5 FRM monitor t o t he Madera site. Once this proposal becomes implemented, the ARB PQAO meets collocation requirements for continuous PM 2.5 FEM.

The CFR also requires that 80 percent of the collocated PM 2.5 monitors are sited at monitoring stations that are within +/

- 20 percent of the federal PM 2.5 standards. California is a very large state in which environmental conditions (e.g., temperature, precipitation, humidity, wind speeds, and elevation) vary widely and the composition of the PM 2.5 varies significantly. Also, a large number of operating agencies operate sites in the statewide PM 2.5 network. ARB and local air districts designed the locations of collocated PM 2.5 samplers to strike a balance in adequately representing all of these factors. In this way, the quality control function of the collocated monitoring is best realized. While Appendix A of

_______________________________________________________________________ 39 Annual Monitoring Network Report for Twenty

- three Districts in California40 CFR 58 requires 80 percent of the collocated monitors to be within + 20 percent of the applicable federal air quality stand ard, focusing on achieving this was deemed to result in too much clustering of the collocated monitors in too few of the factors needing representation. To support this determination, the U.S. EPA requested that the network plan includes design val ues of the collocation sites. Table 12 lists the design values of the PM 2.5 FRM and FEM

mo nitors at each of the collocation sites in the ARB PQAO. Note that exceptional events are included in the determination of the design values for these PM sites.

Ta ble 12 Design Values for PM 2.5 Collocation Sites (ug/m 3 )

Collocation Site Name 201 3 Annual Design Value 2013 24

- hr Design Value
Bakersfield (FRM /FRM ) 16.4 65

Calexico (FRM /FRM ) 13.8 30 Fresno (FRM /FRM ) * 15.5 62 Sacramento (FRM /FRM ) 10.4 36

Tru ckee (FRM /FRM ) 7 21 Victorville (FRM /FRM ) 6.8 13

Collocation Site Name 201 3 Annual Design Value 201 3 24

- hr Design Value
Humboldt Hill (FEM /FRM ) **

-- -- Keeler (FEM /FRM ) 7.6 38 Modesto (FEM /FRM ) 13.6 51 Salinas (FEM /FRM ) 6.3 14 Simi Va lley (FEM /FEM ) 9.1 20

Stockton (FEM /FEM ) 13.9 45

Notes: *The 2013 design value s for the Fresno site were computed with data from the Fresno

- 1 st Street site and Fresno

- Garland site.

**There were insufficient data to compute valid 2013 design value s for the Humboldt Hill site.

**PM 10**  **Collocation Status**

The CFR also requires that 15 percent of PM 10 sites with manual monitoring have collocated samplers. For this assessment, per U.S. EPA’s guidance, the ARB combines all of the PM 10 FRM monitors regardl ess of its method type to get the total number of required collocation sites in the ARB PQAO. Currently, there are 49 PM 10 FRM sites in the ARB PQAO of wh ich four sites are already collocated

. The collocation sites are: Bakersfield

- California, Fresno

- Dru mmond, Sacramento

- Del Paso Manor and Keeler.

To meet the PM 10 collocation require ment, the ARB PQAO needs three additional PM 10 collocation sites because the Simi Valley site is no longer collocated for

_______________________________________________________________________ 40 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaPM 10 FRM. The Simi Valley site currently has only a continuous PM 10 FEM monitor

. ARB is currently evaluating site locations in the ARB PQAO to add three additional PM 10 collocation sites. More information regarding the selection of additional PM 10 collocation sites will be provided in the 2015 ARB networ k plan

.

**Lead Collocation Status**

On December 14, 2010, U.S. EPA finalized the rule for the revised federal lead (Pb) standard, which also specifies the collocation requirements for Pb. The regulations specify that PQAOs that have a combination of source and

non

- source Pb sites have 15 percent of their Pb monitoring sites collocated. The regulations also require that the Pb network be treated independently from the PM network, and that the first collocation site be at the highest Pb concentratio n site within the network. Moreover, the regulations specify that if a PQAO has no

source or non

- source Pb monitoring, and the only Pb monitoring is conducted at NCore sites, then the collocated Pb monitor must be of the same method designation as the pri mary Pb monitor.

The ARB PQAO requires no source or non

- source Pb monitoring. However, the ARB PQAO does have two NCore sites located at Fresno

- Garland and Sacramento

- Del Paso Manor and one SLAMS site located at Calexico

- Ethel that monitors for Pb. Pb collocation at the NCore sites is being han dled at the national level so ARB is not required to collocate for Pb at either the Fresno or Sacramento sites . However, ARB is required to collocate for Pb at the Calexico

- Ethel site. Since Pb monitoring at Cal exico

- Ethel is not required, ARB could discontinue Pb monitoring at this site if ARB chooses too. However, if ARB decides to continue Pb monitoring at Calexico

- Ethel, then ARB will need to collocate. ARB is currently evaluating options and will ensure th at colloca tion for Pb is met for the PQAO by the 2015 network plan.

**Distance between Collocated PM Monitors**

T he CFR requires that information regarding the distance between collocated PM monitors be included in the network plan. Table 13 lists the dista nce between the collocated monitors at each of the PM collocation sites in the ARB PQAO. Note that most of the PM colloca tion sites listed in Table 13 are not covered in the geographical scope of this network plan. However, because collocation is a PQAO requirement, ARB is including this information in this plan.

_______________________________________________________________________ 41 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 13 Distance between Collocated PM Monitors

PM2.5 FRM/FRM Collocation Site Name Distance (in meters)
Bakersfield 2.3

Calexico 2.0

Fresno 2.0 Sacramento 1.8

Truckee 4.6
Vi ctorville 1.7

PM2.5 FEM/FRM Collocation Site Name Distance (in meters)
Humboldt Hill 2.0 Keeler 1.4 Modesto 2.8 Salinas 2.9

P M2.5 FEM/FEM Collocation Site Name Distance (in meters) Simi Valley 2.1

Stockton 1.1

PM1 0 FRM/FRM Collocation Site Name Distance (in meters)
Bakersfield 2.3

Fresno 4.9 Keeler 1.7 Sacramento 2.8

Federal Background, Transport, Max Concentration and Area

- wide PM 2.5 Monitoring Requirements

Federal monitoring also required that the network plan list sites in California that represent background, transport, max imum concentration or area

- wide monitoring for PM 2.5 . From a statewide perspective, b ackground sites are intended to quantify regionally representative PM 2.5 concentration s for sites located away from populated areas and other significant emission sources. The following sites serve as regional background sites in California:

Northern California background site

- Point Reyes National Seashore (AQS # 060410002)

_______________________________________________________________________ 42 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSouthern Cal ifornia background site

– San Rafael Wilderness (AQS # 060839000)

T hese background PM 2.5 sites are a part of the Interagency Monitoring of Protected Visual Environments (IMPROVE) program

, which is governed by a steering committee composed of representati ves from federal and regional

- state agencies. PM 2.5 mass data (i.e., 88502) are currently being reported from these two sites into AQS. Note that ARB also operates a PM 2.5 site at Point Reyes (060410003) but this site is not the same site as the Point Re yes National Seashore site (060410002) operated by the National Park Service . ARB’s Point Reyes site was discontinued in December 2013. More information on the IMPROVE program can be found at: http://vista.cira.colostate.edu/improve/Overview/Overview.htm

For transport monitoring, ARB has identified two PM 2.5 monitoring sites with in the geographical area of this report as transport sites. They are the Vallejo and Roseville site s, which captu re pollutant transport from the Bay Area to the Sacramento region and pollutant transport from Sacramento to the outlying areas of Sacramento, respectively. Among the remaining sites included in this report, ARB has identified a total of 19 area

- wide PM 2.5 monitoring sites. These sites are identified as area

- wide based on their siting scale designation as either neighborhood, urban, or regional per Subpart A of 40 CFR, Part 58, Section 58.1. A subset of seven of the area

- wide monitoring sit es has been ide ntified as representing the maximum concentration site in each respective MSA. The area

wide and maximum concentration PM 2.5 sites are listed below. Note that not all PM 2.5 sites are designated as background, transport, max imum conce ntrati on or
area

- wide. There are other purposes for PM 2.5 monitoring; for example, monitoring for quality assurance purposes.

Area

- wide PM 2.5 Sites: Auburn Chico Colusa Grass Valley Lakeport Lancaster Mojave Portola Quincy Red Bluff Redding Rid gecrest Roseville San Andreas Ukiah Willits Woodland Yreka Yuba City

Maximum Concentration PM2.5 Sites: Chico Lakeport Lancaster Red Bluff Redding Willits Yuba City

_______________________________________________________________________ 43 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 7. Federal Air Quality Assurance

The information below, along with the information available via the web link ( http://www.arb.ca.gov/aaqm/qa/qa.htm ), provides an overview of ARB’s Quality Management Branch (QMB) compliance status with the requirements of 40 CFR Par t 58, Appendices A, C, and E. The compliance status overview is part of the annual network plan requirement.

Background

The Quality Assurance Section (QAS) and Quality Management Section (QMS) fulfill the QMB mission to ensure ambient air quality data m eet or exceed the quality and program objectives of the end users. QAS and QMS perform various quality assurance activities to verify that data collected comply with procedures and regulations set forth by U.S. EPA and can be considered good quality data and data

- for

- record.

The quality assurance activities are achieved through various audits which are independent from the ambient air monitoring program responsibilities. California’s large network and unique ambient air monitoring challenges require a comprehensive state of the art audit program. ARB’s audit program meets the federal requirements for conducting annual performance evaluations and has been designated as equivalent to the National Performance Audit Program. Audits are conducted by using independent National Institute of Standards and Technology (NIST) traceable standards and must adhere to federally established acceptance criteria.

QAS is responsible for conducting performance audits of criteria and non

- criteria pollutant analyzers, pa rticulate samplers, meteorological equipment, and laboratory analyses utilized for generating ambient level measurements. QAS also performs site reviews as well as reports quality assessment and quality control results. QMS is responsible for ensuring t hat ARB meets its federally mandated PQAO responsibilities. QMS performs system audits and provides quality assurance oversight of the PQAO districts.

During an audit, if a parameter fails to meet critical criteria (QA Handbook Volume II, Appendix D)

, a n Air Quality Data Action (AQDA) request is issued to the facility operator. All AQDA’s must be investigated by the operator and resolved to bring the parameter in question into compliance. The station operator completes the AQDA by documenting the resol ution, specifying the time period during which data was potentially affected, and recommending whether the data is to be released, corrected, or invalidated. QMB reviews the completed AQDA and discusses any concerns with the operator. A finalized copy of the AQDA is forwarded to the operator and ARB’s Air Quality Analysis Section. Other issues identified as systematic or operational criteria that may impact or potentially impact data quality is documented through the issuance of a Corrective Action Notif ication (CAN).

_______________________________________________________________________ 44 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaARB Quality Assurance Activities

**Monitoring Station Audits**

Annually, QAS conducts through

- the

- probe (TTP) audits for all continuous gaseous analyzers in the network. TTP audits of the gaseous analyzers, monitoring for carbon monoxide, ni trogen dioxide, hydrogen sulfide, sulfur dioxide, and ozone are conducted in accordance with U.S. EPA requirements (Title 40, CFR, Part 58, Appendix A). These audits verify the accuracy of the gaseous analyzers and ensure the integrity of the entire sampl ing system. For most TTP audits, an audit van is transported by QAS to the ambient air monitoring station. Audit vans house the necessary instrumentation and equipment to allow the audit to be conducted at the same condition as the station instruments. TTP audits, depicted in Figure 2 , are conducted by introducing NIST traceable gases from the van into the station sampling probe inlet at various concentrations. QAS compares the results obtained from the station analyzer to the known values generated in the van.

Figure 3 Through

- the

- Probe Audit

TTP audit methodology can identify deficiencies caused by poor analyzer response, pollutant scavenging contaminants, and sampling system leaks. Deficiencies like these can cause the gaseous analyzers to fa il an audit and possibly affect the quality of the ambient air data.

Biannually, QAS determines the accuracy of each particulate sampler in the network by comparison of the instrument's flow rate to either a certified orifice or

_______________________________________________________________________ 45 Annual Monitoring Network Report for Twenty

- three Districts in Californiaa mass flow meter. Thes e devices are certified against a NIST traceable flow device or calibrator. The audit device is connected in

- line with the sampler's flow path and the flow rate is measured while the sampler is operating under normal sampling conditions. The true flow is calculated from the audit device's calibration curve. The sampler's flow is then compared to the true flow, and a percent difference is determined for verifying compliance.

QAS also conducts annual sensor audits of meteorological parameters, using NIST traceable equipment. Accurate meteorological data are important for characterizing meteorological processes such as transport and diffusion, and to make air quality forecasts and burn

- day decisions.

An integral part of a performance audit is conducting a siting evaluation. Stations that meet siting criteria at the time of initial setup may no longer conform due to updated regulations, or changes in surrounding conditions and land use. Physical measurements and observations are noted on the site survey o r accompanying documentation to determine compliance with 40 CFR Part 58, Appendix E requirements. Many of the siting issues result from the growth of vegetation/trees infringing on the minimum distance required from probes/inlets.

**Laboratory Performance and System Audits** 

Additionally, laboratory mass analysis performance audits are conducted annually by QAS. These audits utilize NIST certified weights, hygrometers, and temperature sensors to verify the accuracy of the laboratory balance, relative humid ity, and temperature sensors.

QMB conducts system audits to determine whether a district’s air monitoring program satisfies the requirements of 40 CFR Part 58 and U.S. EPA's Quality Assurance Handbook for Air Pollution Measurement Systems, Volume II. C ompliance with these regulations is necessary if the data are to be considered data

- for

- record per the California Code of Reg ulations (Title 17, Article 3, S ection 70301). Data meeting these requirements are eligible to be used in actions taken pursuant t o the federal and California Clean Air Acts.

**Quality Assessment and Quality Control**

QAS also ensures the quality of the data collected by the air monitoring stations operating in California through analysis of precision data submitted to U.S. EPA’s AQS d atabase. Precision checks for gaseous/continuous samplers are required once every two weeks. These precision checks are conducted nightly at ARB and some district operated sites, and weekly or bi

- weekly at other district sites. Precision checks for non

- continuous, collocated particulate samplers are to be performed at least every twelfth day. QAS staff analyzes the precision data in accordance with 40 CFR 58, Appendix A.

_______________________________________________________________________ 46 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaAir monitoring staff performs a one

- point flow rate verification check at least o nce every month on the filter

- based and automated PM analyzers. Air monitoring staff reviews these data and takes corrective action when the results exceed U.S. EPA’s requirements. These flow rate verifications are used to assess bias of the automated i nstruments in accordance with 40 CFR Part 58, Appendix A, 3.2.3. These bias estimates are further verified by the semi

- annual flow rate audits that are conducted five to seven months apart in each calendar year. In the course of auditing the PM 2.5 FRM an d continuous samplers, the date of the last six months of flow rate and leak checks performed by the air monitoring staff are recorded.

Audit Report Summary

Information about each air monitoring station audited by QMB is available at: http://www.arb.ca.gov/qaweb/sitelist_create.php . This web page provides the map location, latitude and longitude coordinates, site photos, the pollutants monitored, along with a detailed site survey of the in strumentation and physical parameters for each site.

The 2013 calendar year audit dates for both the gaseous analyzers and PM monitors operating at the monitoring sites covered in this report are provided in Table 1 4

. The residence time for each gas a nal yzer is included in Table 15

. Audit results are directly submitted to AQS quarterly per Appendix A of 40 CFR Part 58. In addition, as required by 40 CFR Part 58.15, ARB submits a data certification letter along with the required AQS reports (AMP450NC an d AMP600) to U.S.EPA, annually. The last certification letter was sent to the U.S. EPA on May 16, 2014. In 2015, ARB intends to certify the data on or before the May 1 deadline.

Table 1 4 2013 Audit Date Information for the Monitors in this Plan

Site Nam e Gaseous Audit First Flow Audit Second Flow Audit

Middletown

- Anderson Springs 08/28/2013 02/28/2013 08/28/2013

Anderson

- North Street 04/10/2013 04/10/2013 10/01/2013

Auburn

– Atwood Road 08/13/2013 02/07/2013 08/13/2013

Auburn

– Dewitt C Avenue

- 02/0 7/2013 08/13/2013

Barstow 02/13/2013 02/13/2013 08/07/2013
Blythe

- Murphy Street 02/12/2013

- - Canebrake

- 02/07/2013 08/27/2013

Chester

- 03/13/2013 09/03/2013

Chico

– East Avenue 07/09/2013 01/29/2013 07/09/2013

Cloverdale

- 06/07/2013 12/10/2013

Colfax

- City Hall 08/12/2013 02/07/2013 08/12/2013

Colusa

- Sunrise Blvd 06/14/2013 06/14/2013 11/26/2013

_______________________________________________________________________ 47 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite Nam e Gaseous Audit First Flow Audit Second Flow Audit Cool (seasonal) 08/12/2013

- - Davis

- UCD Campus 07/30/2013 02/14/2013 07/30/2013
Echo Summit (seasonal) 06/13/2013

- - Fort Bragg

– 300 Dana Street

- 06/06/2013 12/09/2013

Glenbrook 08/28/2013 02/28/2013 08/28/2013 Grass Valley

- Litton Building 03/19/2013 03/19/2013 09/27/2013 Gridley

- 05/22/2013 11/26/2013

Guerneville

- Church and 1st

- 06/05/2013 12/10/2013
Healdsburg

- Matheson

- 06/05/2013 12/1 0/2013
Healdsburg

- Municipal Airport 06/05/2013

- - Hesperia

- Olive Street 02/26/2013 02/26/2013 08/06/2013

Jackson

- Clinton Road 05/29/2013

- - Jerseydale 11/01/2013

- - Joshua Tree National Monument 08/06/2013

- - Joshua Tree

– Pinto Wells 08/06/2013

- - Joshua Tree

- Cottonwood 08/07/2013

- - Lakeport

– Lakeport Blvd 08/29/2013 02/28/2013 08/29/2013

Lancaster

– Division Street 02/21/2013 02/21/2013 08/06/2013

Lassen Volcanic National Park 04/09/2013

- - Lucerne Valley

- Middle School

- 02/27/2013 08/07/2013
Mojave 02/05/2013 02/05/2013 08/28/2013

Paradise

– Airport 07/10/2013

- - Phelan

– Beekley Road & Phelan 02/20/2013

- - Placerville

– Gold Nugget Way 06/12/2013

- - Portola

– Nevada Street

- not yet operational 09/03/2013 Quincy

– N Churc h Street

- 03/13/2013 09/03/2013

Red Bluff

– Main Street

- 01/30/2013 07/08/2013

Red Bluff

– Messer Drive

- 01/30/2013 07/08/2013

Red Bluff

– Oak Street Name 07/08/2013

- - Redding

– Health Department 04/09/2013 04/09/2013 10/01/2013
Ridgecrest

– Cali fornia Ave

- 02/05/2013 08/28/2013

Roseville

– N Sunrise Blvd 07/29/2013 02/11/2013 07/29/2013

San Andreas

– Gold Strike Road 05/30/2013 05/30/2013 11/25/2013

Shasta Lake

– Lake Blvd 04/08/2013

- - Shasta Lake

– La Mesa

- 04/08/2013 10/01/2013

Sonora

– Barretta Street 05/29/2013

- - South Lake Tahoe

– Sandy Way

- 06/13/2013 12/02/2013
Sutter Buttes (seasonal) 05/13/2013

- - Trona

– Athol/Telescope #2 10/16/2013 04/23/2013 10/16/2013

Truckee

- Fire Station

- 03/12/2013 09/03/2013
Tuscan Butte (seas onal) 05/15/2013

- -

_______________________________________________________________________ 48 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite Nam e Gaseous Audit First Flow Audit Second Flow Audit

Ukiah

– Gobbi Street 06/06/2013

- - Ukiah

– Library

- 06/06/2013 12/09/2013

Vacaville

– Merchant Street

- 02/04/2013 07/18/2013

Vacaville

– Ulatis Drive 07/18/2013

- - Victorville

– Park Avenue 02/28/2013 02/28/2013 08/06/2013

We st Sacramento

– 15th Street

- 02/04/2013 07/17/2013
White Cloud (seasonal) 09/04/2013

- - Willits

– Justice Center

- 06/06/2013 12/09/2013

Willows

– Colusa 07/16/2013 02/05/2013 07/16/2013

Woodland

– Gibson Road 07/17/2013 02/05/2013 07/17/2013

Yosemi te Natl Park

– Turtleback 11/18/2013

- - Yosemite Village

– Visitor Center

- 04/08/2013 11/18/2013*

Yreka 10/02/2013 04/10/2013 10/02/2013 Yuba City 07/11/2013 01/29/2013 07/11/2013

Note:

* Due to Ri m Fire the semi

- annual flow audit at Yosemite Village could not be schedule d and audited within the 5 to 7 month interval requirement.

Table 15 2013 Gaseous Inlet Probe Residence Time

Site Name Gaseous Residence Time (seconds)

Ozone Nitrogen Dioxide Carbon Monoxide Sulfur Dioxide Hydrogen Sulfide

Middl etown

- Anderson Springs

- - - - 3.7

Anderson

- North Street 6.9

- - - -
Auburn

– Atwood Road 17.1

- - - -
Barstow

- 12.4

- - - Blythe

- Murphy Street 17.7

- - - -
Chico

– East Avenue 12.1 14.2

- - -
Colfax

- City Hall 14.2

- - - -
Colusa

- Sunrise Blvd 6.9

- - - - Cool (seasonal) 11.0

- - - -
Davis

- UCD Campus 16.7 16.8

- - - Echo Summit (seasonal) 12.1

- - - -
Glenbrook

- - - - 5.3 Grass Valley

- Litton Building 7.2

- - - - Healdsburg

- Municipal Airport 14.2

- - - - Hesperia

- Olive Street 5.0

- - - - Jack son

- Clinton Road 5.0

- - - - Jerseydale 15.8

- - - -

_______________________________________________________________________ 49 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSite Name Gaseous Residence Time (seconds)

Ozone Nitrogen Dioxide Carbon Monoxide Sulfur Dioxide Hydrogen Sulfide

Joshua Tree National Monument 4.0

- - - - Joshua Tree

– Pinto Wells 4.3

- - - - Joshua Tree

- Cottonwood 7.1

- - - - Lakeport

– Lakeport Blvd 13.5

- - - - Lancaster

– Division Street 14.0 15.7 14.0

- - Lassen Volcanic National Park 9.3

- - - - Mojave 8.3

- - - - Paradise

– Airport 11.7

- - - - Phelan

– Beekley Road & Phelan 6.4

- - - -

Placerville

– Gold Nugget Way 6.3

- - - - Red Bluff

– Oak Street Name 12.7

- - - - Redding

– Health Departme nt 7.6

- - - -
Roseville

– N Sunrise Blvd 18.4 18.7

- - - San Andreas

– Gold Strike Road 8.9

- - - - Shasta Lake

– Lake Blvd 18.0

- - - - Sonora

– Barretta Street 9.1

- - - - Sutter Buttes (seasonal) 9.2

- - - - Trona

– Athol/Telescope #2 7.9 10.0

- 8.3 8.7 Tuscan Butte (seasonal) 6.9

- - - - Ukiah

– Gobbi Street 16.6

- - - - Vacaville

– Ulatis Drive 4.3

- - - - Victorville

– Park Avenue 15.3 13.4 11.9 12.3

- White Cloud (seasonal) 15.9

- - - - Willows

– Colusa 5.8

- - - - Woodland

– Gibson Roa d 6.5

- - - - Yosemite Natl Park

– Turtleback 9.9

- - - - Yreka 4.8

- - - - Yuba City 7.5 8.4

- - -

_______________________________________________________________________ 50 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 8 . Operating schedules

The CFR requires that the annual network plan include information about operating schedules

. While g aseous monitor s (e.g., O 3 , CO, NO 2 , SO 2 ) and particulate monitoring w ith FEMs usually operate continuously throughout the year, particulate monitoring with FRMs often op erate one day out of every three days or one day out of every six days

. The primary reason why parti culate FRM s operate less frequently is that the particulate FRMs are filter

- based and therefore much more labor intensive , requiring that field staff frequently retrieve and replace filters and that laboratory staff pre

- and post

- weigh filters

. The contin uous gaseous and particulate monitors produce hourly measurements of the gaseous and particulate pollutants, while the particulate filter

- based monitors produ ce 24

- hour measurements of particulate pollutants.

Particulate matter operating schedules

Curren t o p erating schedules for PM 2.5 FRM monitors in t he areas included in this report are listed in Table 1 6

. The se schedules were obtained from the U.S. EPA’s AQS database. In March 201 4

, the U.S. EPA provided to ARB an annual network plan checklist which i ncludes a finding that req uests ARB add the most recent design values for the PM 2.5 FRM monitors that are covered in this report which are operating on a 1

- in

- 6 day schedule. D esign values of the PM 2.5 monitoring sites included in this plan are also inclu ded in Table 16

. Note that exceptional events are included in the determination of the design values. In addition, on August 5, 2013, ARB formally requested approval from the U.S. EPA for the reduction of the sampling frequency for the PM 2.5 FRM monitors covered in this report

. The letter requesting U.S. EPA approval is attached in Appendix C

. At the time this report was drafted, ARB has not received a formal response from the U.S. EPA regarding the approval request.

While there are a number of continu ous PM 2.5 monitors deployed, most of these are not federal equivalent methods (FEM)

. In March of 2008, U.S. EPA approved the fir st continuous PM 2.5 FEM

. Then o n June 2009 and March 2011, U.S. EPA approved two more continuous PM 2.5 FEMs. At the time this report was drafted, i n the ARB PQAO, there are 34 continuous PM 2.5 FEM sites.

Operating schedules for the manual PM 10 samplers in the areas included in this report all operate on a 1

- in

- 6 day schedule

. Similar to the PM 2.5 FRM monitors, the 1

- in

- 6 day schedule of the PM 10 FRM monitors must also meet certain monitoring criteria. To determine whether the PM 10 FRM monitors covered in the scope of this plan also meet the 1

- in

- 6 day schedule, EPA requested the

max imum concentration s of the PM 10 FRM sites. Table 17 lists the PM 10 FRM sites covered in this plan along with the 2013 PM 10 max imum concentrations. Note that exceptional events are included in the determination of the maximum concentrations.

_______________________________________________________________________ 51 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaThere are also nine continuous PM 10 monitors operating in the area that this report covers, which are reporting data into AQS. These monitors are located at the South Lake Tahoe, Fort Bragg, Mojave, Lancaster, Trona, Willows, Barstow, Hesperia and Victorville sites. These continuous PM 10 monitors are FEMs a nd

ar e either BAM or TEOM monitors.

Table 1 6 Current PM 2.5 FRM Operating Schedules and Design Values (Monitors of the air districts included in this report)

Site Name AQS Site Number Current Schedules 2013 Design Values 24hr / Ann. Avg. (ug/m 3 ) Chico

- Ea st 060070008 Everyday 34 / 10.1 Colusa

- Sunrise Blvd 060111002 1 in 6 day 24 / 7.1 Grass Valley

- Litton Building 060570005 1 in 6 day 15 / 4.6 Lakeport

- Lakeport Blvd 060333001 1 in 6 day 10 / 3.7
Lancaster

- 43301 Division St 060379033 1 in 6 day 25 / 6.1
Portola

- 222 1st Avenue 060631007 1 in 3 day 37 / 12.8 Quincy

- N Church Street 060631006 1 in 3 day 36 / 10.2 Redding

- Health Department Roof 060890004 1 in 6 day 17 / 5.7 Ridgecrest

- 100 West California 060290015 1 in 6 day 11 / 5.4
Roseville

- N Sunrise Blvd 060610006 1 in 6 day 19 / 7.5
Truckee

- Fire Station 060571001 1 in 3 day 21 / 7
Victorville

- 14036 Park Ave 060710306 1 in 6 day 13 / 6.8
Woodland

- Gibson Road 061131003 1 in 6 day 21 / 7.2
Yreka

- Foothill Drive 060932001 1 in 6 day 26 / 6 .3 Yuba City

- Almond Street 061010003 Everyday 29 / 7.7

_______________________________________________________________________ 52 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaTable 17 Max imum Concentrations of the PM 10 FRM Sites Covered in this Plan

Site Name AQS Site Number 2013 24

- hr max

conc. (ug/m 3 )
Anderson 060890007 40.5 Auburn 060610002 79.5 Canebrake 06029 0017 43.3 Chico 060070008 59.0 Cloverdale 060970001 24.0 Colfax 060610004 57.5 Colusa 060111002 73.4 Guerneville 060973002 37.0 Healdsburg 060970002 54.0 Lucerne Valley 060710013 13.0 Red Bluff 061030002 54.5 Redding 060890004 29.5 Roseville 0606 10006 55.5 San Andreas 060090001 55.6 Shasta Lake 060890008 45.5 Vacaville 060953001 35.4 West Sacramento 061132001 62.4 Woodland 061131003 60.3 Yosemite Village 060431001 102.1 Yreka 060932001 54.6 Yuba City 061010003 56.1

Note s : The PM 10 FRM m onitors at Glenbrook (060333011), Lakeport (060333001), and Middletown (060333010) were not included in this table because these monitors report PM 10 data in local conditions (i.e., 85101) and not in standard conditions (i.e., 81102) . PM 10 data is require d to be reported in standard conditions for NAAQS comparison.

Ozone operating schedules

While most ozone monitors operate continuously all year, a small number of

ozone sites in the areas included in this report operate only in the wa rmer six months o f the year . Several of these sites are at higher elevation where access during the winter can be problematic. Also, for most of the State, ozone is a summertime problem and concentrations during the winter are well below the levels of the ambient air qua lity standards. The following seasonal ozone sites in the areas included in this report all operate from May through October:

Cool ( El Dorado County ) Echo Summit (El Dorado County) J erse ydale ( Mariposa County ) S utter Buttes ( Sutter Count y ) Tuscan Butte ( Tehama County ) White Cloud (Nevada County)

_______________________________________________________________________ 53 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaIn March 2013, EPA provided to ARB an annual network plan checklist which includes a finding that requires ARB to justify the monitoring schedule of the

s easonal ozone sites that are covered i n this report. Federal regulations require that ozone monitors operate every day, from January through December, unless certain monitoring criteria are met and U.S. EPA approves the seasonal schedule. ARB sent a request to the U.S. EPA on June 5, 2013, a sking for approval of the monitoring schedule of the seasonal ozone sites covered in this report

. On July 17, 2013, U.S. EPA approved the request. The approval letter is attached in Appendix C of this report.

_______________________________________________________________________ 54 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaS ection 9 . Additional information on PM 2.5 monitors

This section includes information for two required annual network plan elements that relate specifically to PM 2.5 and do not fit well elsewhere in the report. One required element relates to whether data for a PM 2.5 monitor can be used to deter mine compliance with the national annual PM 2.5 air quality standard. In the CFR, this is termed as the suitability for comparison to the annual standard. The other element requires inclu ding in the annual network plan information regarding the review pro cess followed by air agencies when changes are made to the location of a PM 2.5 monitor that is violating a PM 2.5 standard

.

9.1 Suitability for comparison to the annual PM 2.5 standard

The CFR states that for PM 2.5 FRM or FEM monitors used in area

- wide

mon itoring, and that meet siting criteria, the reported data are comparable to the annual PM 2.5 standard. For a PM 2.5 monitor to be considered area

- wide , the concentration values measured by the monitor should be representative of concentrations expected ove r an area with dimensions of a few kilometers. T he PM 2.5 FRM and FEM monitors included in this report are sited per the definition of

area

- wide monitoring in the CFR and meet applicable requirement s ; therefore

, the FRM and FEM data are suitable for compar ison to the PM 2.5 NAAQS.

9.2 Review of changes to PM 2.5 network

The PM 2.5 network of FRM monitors in California was largely established in 1999 and completed in 2000. L ittle h as changed in the siting of the FRM monitoring network between then and now. How ever, between 2008 and 2011

, U.S. EPA approved three type s of PM 2.5 FEM s , which are Met One (meth od 170), GRIMM (method 195) and Thermo (method 181). At the tim e this report was drafted, four agenc ies ( AR B

, Mendocino County, Placer County and Tehama County) in the areas covered by this report have submitted data from these monitors to the AQS database

. As part of ARB’s ongoing oversight process, ARB requests the opportunity to review and comment on the possible regulatory consequences of any propos al to move or discontinue a monitor for any pollutant that violates a national or State air quality standard

. Furthermore, w hen a local agency proposes to move or discontinue a monitor indicating the hig h est concentration s of a pollutant in an

area , ARB r equests that the agency conduct a pe riod of concurrent or parallel monitoring at that site and at the replacement site being proposed to represent the area as the required high site for the pollutant . This is expected even when the site is close to but no t exceeding any standard for the pollutant. The parallel monitoring is typically for a period of many months or a year, depending on the pollutant, the standard that is of most concern, and other factors. In addition, ARB utilizes the annual network plan process to document and provide the public opportunities to comment on any proposed changes to the monitoring network. Any received comments are formally address ed via letters and are documented

_______________________________________________________________________ 55 Annual Monitoring Network Report for Twenty

- three Districts in Californiain the network plan. The network plan is submitted to the U.S. EPA annually for formal approval of all network modifications , including changes to the PM 2.5 network.

_______________________________________________________________________ 56 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSe ction 10 . Proposed and recently implemented monitoring site changes

This section lists the proposed and recently impl emented monitoring site changes in the areas incl uded in this report, as well as changes to the monitoring sites that the ARB operates in areas outside the stated geographical scope of this report. Proposed monitoring site changes include proposals by the ARB or by distric ts that are covered in this report to add, remove, or move sites and/or monitors in the monitoring network before the end o f 201 5

. Recen tly implemented monitoring changes include deployed and/or terminated sites and monitors in the monitoring network that the ARB has become aware of since last year’s report . Listed below are the proposed and implemented changes to the monitoring network that ARB is aware of at this time.
Proposed or Implemented ARB Changes:

The ARB recently terminated the Point Reyes si te (060410003) in December 2013. The only monitor operating at the Point Reyes site is a PM 2.5 non

- FEM BAM of which EPA approval is not needed for the termination . In addition, ARB replaced the PM 2.5 non

- FEM BAM at the Sacrame nto

- T Street site (06067001 0) with a PM 2.5 FEM BAM on May 20, 2014. Finally, in 2013, ARB replaced the PM 10 FRM monitor at the Willows site (060210003) with a continuous PM 10 BAM monitor.

Proposed or Implemented District Changes:

The Antelope Valley APCD plans to replace the PM 2. 5 FRM monitor at t he Lancaster site (060379033) with a continuous PM 2.5 FEM BAM by the end of 2014. In addition, the PM 10 FRM monitor at this site was replaced with a continuous PM 10 BAM on January 1, 2013. Note that while the Lancaster site is owned and operated by the Antelope Valley APCD, it is the Mojave Desert AQMD that maintains the site and monitors

. Moreover , Mojave Desert AQMD is also responsible for the data submittals at Lancaster.

The Mojave Desert AQMD replace d the PM 10 FRM monitors at the B arstow (060710001) , Hesperia (060714001) , Trona (060711234) and Victorville (060710306) sites with continuous PM 10 B AM monitors between late 2013 and early 2014. EPA approval was not needed for the PM 10 monitor replacements. In addition, Mojave Desert AQ MD plans to replace the PM 10 FRM with a continuous PM 10 BAM at Lucerne Valley (060710013) in August 2014. Mojave Desert AQMD wants to transition its PM 10 FRM network to a continuous PM 10 BAM network and anticipates submitting both standard and local condi tions PM 10 BAM data from its network. Finally, the district plans to replace one of the PM 2.5 FRM mon itors at the Victorville site with a continuous PM 2.5 FEM BAM by the end of 2014.

The Northern Sierra AQMD relocated the Portola

- Nevada Street site (06063 1009) to a new location on 420 Gulling Street in August 2013. The new

_______________________________________________________________________ 57 Annual Monitoring Network Report for Twenty

- three Districts in Californiasite is called Portola

- Gulling Street (060631010). U.S. EPA approved the relocation on December 11, 2013. The approval letter is attached in Appendix C.

The Northern Sonoma APCD repl aced the PM 10 FRM monitors at the Cloverdale (060970001), Guerneville (060973002), and Healdsburg (060970002) sites with continuous PM 10 BAM monitors in 2013. EPA approval of the mon itor transitions was not needed because these changes weren’t monitor clo sures. The D istrict submit ted the PM 10 BAM data into AQS effective January 1, 2014

.

In the 2013 ARB annual network p lan, the Placer County APCD proposed a new monitoring site in Tahoe City . The Tahoe City site (060611004) is now completed and began sam pling in November 2013. Ozone and continuous PM 2.5 non

- FEM BAM data are being reported from this site to AQS. The ozone monitor is designated as a SLAMS monitor in AQS. For this reason, U.S. EPA approval of the SLAMS o zone monitor is required. The D ist rict is currently drafting the approval request. In addition, Placer County APCD is proposing to terminate the PM 10 monitors at the Auburn (060610002) and Colfax (060610004) sites in Placer County. The D istrict will also be asking for U.S. EPA ap proval o f these closures

. Finally, the District relocated the ozone monitor at the Auburn

- Dewitt C

- Avenue site (060610002) to the Auburn

- 11645 Atwood Road site (060610003) in June 2011 and the ozone monitor at the Lincoln

- L Street site (060612001) to the Lincoln

- 1 st Street site (060612002) in September 2012. U.S. EPA approvals of these relocations are needed. The District letter requesting U.S. EPA approval is included in Appendix C of this report.

The Siskiyou County APCD plans to add a continuous PM 2.5 FEM BAM at the Yreka site (060932001) and re

- designate the existing PM 2.5 FRM monitor as the quality assurance monitor at this site.

The Tehama County APCD plans to relocate the ozone, PM 2.5 FEM BAM , and PM 10 monitors from three different locations in the city o f Red Bluff to a central location in the same city consolidating all monitoring at the new district headquarters by the end of 2015. The new location is approximately two miles northwest of the current location.

_______________________________________________________________________ 58 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaSection 1 1 . A c cess to more information ab out the network

While this report includes a great deal of information about the ambient air quality monitoring network, much more information is readily available

, including summaries of the pollutant data from the monitors around the State

. Much of thi s information is available on the web. This section lists a number of additional sources of such information. Also listed is contact information for the agencies responsible for th e monitoring covered in this report.

ARB’s Monitoring and Laboratory Divi sion (MLD) maintains web pages with information about all the existing monitoring sites that routinely monitor and submit air quality data in California. The pages also include detailed local maps showing the location of the sites. This information can b e found at : http://www.arb.ca.gov/aaqm/mldaqsb/amn.htm

. A more general MLD web page that provides links to other aspects of ambient monitoring is located at : http://www.arb.ca.gov/aaqm/aaqm.htm

.

S ummaries of the official air quality data from site s around the State can be found at: http://www.arb.ca.gov/adam/welcome.html

. S ummaries of th e most recent preliminary data can be viewed at: http://www.arb.ca.gov/aqd/aqinfo.htm . These last two sources of information are maintained by ARB staff of the Air Quality P lanning and Science Division , as is the following more general web page that lists links to other aspects of the ambient air quality data program: http://www.arb.ca.gov/aqd/aqdpage.htm

.

_______________________________________________________________________ 59 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaAgency contact s for ARB

Regarding this report and questions relating to the collected ambient air quality data: Pheng Lee, Air Pollution Specialist, plee@arb.ca.gov , (916) 445

- 6059

Regarding the collection of the ambient data: Ken Stroud, Chief, Air Qua lity Surveillance Branch, kstroud@arb.ca.gov

, (916) 324

- 7591

Regarding quality oversight of the monitoring program: Mike Miguel, Chief , Quality Management Branch

, mmiguel@ arb.ca.gov

, (916) 322

- 0960

Agency contacts for the a ir districts covered in this report

Amador County Air Pollution Control District, Jackson, CA Mike Boitano , Air Pollution Control Officer AirDistrict@ co.amador.ca.us (209) 257

- 0112

Antelope Valley Air Quality Management District, Lancaster, CA Eldon Heaston, Air Pollution Control Officer (also APCO for Mojave Desert) eheaston@mdaqmd.ca.gov (661) 723

- 8070

Butte County Air Quality Management District, Chico, CA James Wagoner , Air Pollution Control Officer jwagoner@bcaqmd.org (530) 332

- 9400

Calaveras County Air Pollution Control District, San Andreas, CA Bria n Moss , Air Pollution Control Officer bmoss@co.calaveras.ca.us (209) 754

- 6504

Colusa County Air Pollution Control District, Colusa, CA Joe Damiano , Air Pollution Control Officer jdamiano@countyofcolusa.org (530) 458

- 0590

Eastern Kern Air Pollution Control District, Bakersfield, CA Glen Stephens, Air Pollution Control Officer glens@co.kern.ca.us (661) 862

- 5250

_______________________________________________________________________ 60 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaEl Dorado County Air Quality Management District, Placerville, CA Dave Johnston , Air Pollution Control Officer dave.johnston@edcgov.us ( 530) 621

- 5896

F eather River Air Qual ity Management District, Yuba City , CA Christopher D. Brown , Air Pollution Control Officer apco@fraqmd.org (530) 634

- 7659 x 203

Glenn County Air Pollution Control District, Willows, CA Jim Donnelly, Air Pollution Con trol Officer jdonnelly @countyofglenn.net (530) 934

- 6500

Lake County Air Quality Management District, Lakeport, CA Doug las Gearhart, Air Pollution Control Officer dougg@lcaqmd.net (707) 263

- 7000

Lassen County Air Pollution Control District, Susanville, CA Dan Newton , Air Pollution Control Officer dnewton@cityofsusanville.org (530) 257

- 1045

Mariposa County Air Po llution Control District, Mariposa, CA Dr. Charles Mosher, Air Pollution Control Officer air@mariposacounty.org (209) 966

- 2220

Mendocino County Air Quality Management District, Ukiah, CA Robert A. Scaglione

, Air Pollution Control Officer mcaqmd@co.mendocino.ca.us (707) 463

- 4354

Modoc County Air Pollution Control District, Alturas, CA Joe Moreo, Air Pollution Control Officer apcd@modoccounty.us (530) 233

- 5522

Mojave Desert Air Quality Management District, Lancaster, CA Eldon Heaston, Air Pollution Control Officer (also APCO for Antelope Valley) eheaston@mdaqmd.ca.gov (661) 723

- 8070

Northern Sierra Air Quality Management District, Grass Valley, CA

_______________________________________________________________________ 61 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaGretchen Bennitt, Air Pollution Control Officer Gretchen@myairdistrict.com (530) 274

- 9360

Northern Sonoma County Air Pollution Control District, Healdsburg, CA Barbara Lee, Air Pollution Control Officer nsc@sonic.net (707) 433

- 5911

Placer County Air Pollution Control District, Auburn, CA Tom Christofk, Air Pollution Control Officer pcapcd@placer.ca.gov (530) 745

- 2330

Shasta County Air Quality Management District, Redding, CA Richard W. Simon

, Air Pollution Control Officer rsimon@co.shasta.ca.us (530) 22 5

- 5789

Siskiyou County Air Pollution Control District, Yreka, CA Patrick Griffin, Air Pollution Control Officer pgriffin@co.siskiyou.ca.us (530) 841

- 4031

Tehama County Air Pollution Control District, Red Bluff, CA Alan Abbs , Air Pollution Control Officer aabbs@tehcoapcd.net (530) 527

- 3717

Tuolumne County Air Pollution Control District, Columbia, CA Vicky Helmar, Air Pollution Control Officer vhelmar@co.tuolumne.ca.us (209) 533

- 5693

Yolo

- Solano Air Quality Management District, Davis, CA Mat Ehrhardt

, Air Pollution Control Officer meharhard@ysaqmd.org (530) 757

- 3673

_______________________________________________________________________ 62 Annual Monitoring Network Report for Twenty

- three Districts in California

### APP ENDIX A Regulatory l anguage of 40 CFR 58.10
§ 58.10 Annual monitoring network plan and periodic network assessment.

(a)(1) Beginning July 1, 2007, the State, or where applicable local, agency shall adopt and submit to the Regional Administrator an annual m onitoring network plan which shall provide for the establishment and maintenance of an air quality surveillance system that consists of a network of SLAMS monitoring stations including FRM, FEM, and ARM monitors that are part of SLAMS, NCore stations, STN stations, State speciation stations, SPM stations, and/or, in serious, severe and extreme ozone nonattainment areas, PAMS stations, and SPM monitoring stations. The plan shall include a statement of purposes for each monitor and evidence that siting and op eration of each monitor meets the requirements of appendices A, C, D, and E of this part, where applicable. The annual monitoring network plan must be made available for public inspection for at least 30 days prior to submission to EPA.

(2) Any annual moni toring network plan that proposes SLAMS network modifications (including new monitoring sites, new determinations that data are not of sufficient quality to be compared to the NAAQS, and changes in identification of monitors as suitable or not suitable for comparison against the annual PM 2.5 NAAQS) is subject to the approval of the EPA Regional Administrator, who shall provide opportunity for public comment and shall approve or disapprove the plan and schedule within 120 days. If the State or local agency has already provided a public comment opportunity on its plan and has made no changes subsequent to that comment opportunity, and has submitted the received comments together with the plan, the Regional Administrator is not required to provide a separate o pportunity for comment.

(3) The plan for establishing required NCore multipollutant stations shall be submitted to the Administrator not later than July 1, 2009. The plan shall provide for all required stations to be operational by January 1, 2011.

(4) A p lan for establishing source

- oriented Pb monitoring sites in accordance with the requirements of appendix D to this part for Pb sources emitting 1.0 tpy or greater shall be submitted to the EPA Regional Administrator no later than July 1, 2009, as part of t he annual network plan required in paragraph (a)(1) of this section. The plan shall provide for the required source

- oriented Pb monitoring sites for Pb sources emitting 1.0 tpy or greater to be operational by January 1, 2010. A plan for establishing source

- oriented Pb monitoring sites in accordance with the requirements of appendix D to this part for Pb sources emitting equal to or greater than 0.50 tpy but less than 1.0 tpy shall be submitted to the EPA Regional Administrator no later than July 1, 2011. Th e plan shall provide for the required source

- oriented Pb monitoring sites for Pb sources emitting equal to or greater than 0.50 tpy but less than 1.0 tpy to be operational by December 27, 2011.

_______________________________________________________________________ 63 Annual Monitoring Network Report for Twenty

- three Districts in California(5)(i) A plan for establishing or identifying an area

- wide NO 2 monitor, in accordance with the requirements of Appendix D, section 4.3.3 to this part, shall be submitted as part of the Annual Monitoring Network Plan to the EPA Regional Administrator by July 1, 2012. The plan shall provide for these required monitors to be operational by January 1, 2013.

(ii) A plan for establishing or identifying any NO 2 monitor intended to characterize vulnerable and susceptible populations, as required in Appendix D, section 4.3.4 to this part, shall be submitted as part of the Annu al Monitoring Network Plan to the EPA Regional Administrator by July 1, 2012. The plan shall provide for these required monitors to be operational by January 1, 2013.

(iii) A plan for establishing a single near

- road NO 2 monitor in CBSAs having 1,000,000 or more persons, in accordance with the requirements of Appendix D, section 4.3.2 to this part, shall be submitted as part of the Annual Monitoring Network Plan to the EPA Regional Administrator by July 1, 2013. The plan shall provide for these required moni tors to be operational by January 1, 2014.

(iv) A plan for establishing a second near

- road NO 2 monitor in any CBSA with a population of 2,500,000 or more persons, or a second monitor in any CBSA with a population of 500,000 or more persons that has one or more roadway segments with 250,000 or greater AADT counts, in accordance with the requirements of Appendix D, section 4.3.2 to this part, shall be submitted as part of the Annual Monitoring Network Plan to the EPA Regional Administrator by July 1, 2014. Th e plan shall provide for these required monitors to be operational by January 1, 2015.

(v) A plan for establishing a single near

- road NO 2 monitor in all CBSAs having 500,000 or more persons, but less than 1,000,000, not already required by paragraph (a)(5) (iv) of this section, in accordance with the requirements of Appendix D, section 4.3.2 to this part, shall be submitted as part of the Annual Monitoring Network Plan to the EPA Regional Administrator by July 1, 2016. The plan shall provide for these monito rs to be operational by January 1, 2017.

(6) A plan for establishing SO 2 monitoring sites in accordance with the requirements of appendix D to this part shall be submitted to the EPA Regional Administrator by July 1, 2011 as part of the annual network plan required in paragraph (a) (1). The plan shall provide for all required SO 2 monitoring sites to be operational by January 1, 2013.

(7) A plan for establishing CO monitoring sites in accordance with the requirements of appendix D to this part shall be submi tted to the EPA Regional Administrator. Plans for required CO monitors shall be submitted at least six months prior to the date such monitors must be established as required by section 58.13.

_______________________________________________________________________ 64 Annual Monitoring Network Report for Twenty

- three Districts in California(8)(i) A plan for establishing near

- road PM 2.5 monitoring sites in CBSAs having 2.5 million or more persons, in accordance with the requirements of appendix D to this part, shall be submitted as part of the annual monitoring network plan to the EPA Regional Administrator by July 1, 2014. The plan shall provide for the se required monitoring stations to be operational by January 1, 2015.

(ii) A plan for establishing near

- road PM 2.5 monitoring sites in CBSAs having 1 million or more persons, but less than 2.5 million persons, in accordance with the requirements of append ix D to this part, shall be submitted as part of the annual monitoring network plan to the EPA Regional Administrator by July 1, 2016. The plan shall provide for these required monitoring stations to be operational by January 1, 2017.

(b) The annual monito ring network plan must contain the following information for each existing and proposed site:

(1) The AQS site identification number.

(2) The location, including street address and geographical coordinates.

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

(4) The operating schedules for each monitor.

(5) Any proposals to remove or move a monitoring station within a period of 18 months following plan submittal.

(6) The monitoring objective and spatial scale of representativeness for each monitor as defined in appendix D to this part.

(7) The identification of any sites that are suitable and sites that are not suitable for comparison against the annual PM 2.5 NAAQS as described in § 58.30.

(8) The MSA, CBSA, CSA or other area represented by the monitor.

(9) The designation of any Pb monitors as either source

- oriented or non

source

- oriented according to Appendix D to 40 CFR part 58.

(10) Any source

- oriented monitors for which a waiver has been requested or granted by the EPA Regional Administ rator as allowed for under paragraph 4.5(a)(ii) of Appendix D to 40 CFR part 58.

(11) Any source

- oriented or non

- source

- oriented site for which a waiver has been requested or granted by the EPA Regional Administrator for the use of

_______________________________________________________________________ 65 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaPb

- PM 10 monitoring in li eu of Pb

- TSP monitoring as allowed for under paragraph 2.10 of Appendix C to 40 CFR part 58.

(12) The identification of required NO 2 monitors as near

- road, area

- wide, or vulnerable and susceptible population monitors in accordance with Appendix D, section 4.3 of this part.

(13) The identification of any PM 2.5 FEMs and/or ARMs used in the monitoring agency's network where the data are not of sufficient quality such that data are not to be compared to the NAAQS. For required SLAMS where the agency identifies that the PM 2.5 Class III FEM or ARM does not produce data of sufficient quality for comparison to the NAAQS, the monitoring agency must ensure that an operating FRM or filter

- based FEM meeting the sample frequency requirements described in § 58.12 or oth er Class III PM 2.5 FEM or ARM with data of sufficient quality is operating and reporting data to meet the network design criteria described in appendix D to this part.

(c) The annual monitoring network plan must document how state and local agencies provi de for the review of changes to a PM 2.5 monitoring network that impact the location of a violating PM 2.5 monitor. The affected state or local agency must document the process for obtaining public comment and include any comments received through the publ ic notification process within their submitted plan.

(d) The state, or where applicable local, agency shall perform and submit to the EPA Regional Administrator an assessment of the air quality surveillance system every 5 years to determine, at a minimum, if the network meets the monitoring objectives defined in appendix D to this part, whether new sites are needed, whether existing sites are no longer needed and can be terminated, and whether new technologies are appropriate for incorporation into the ambi ent air monitoring network. The network assessment must consider the ability of existing and proposed sites to support air quality characterization for areas with relatively high populations of susceptible individuals (e.g., children with asthma), and, for any sites that are being proposed for discontinuance, the effect on data users other than the agency itself, such as nearby states and tribes or health effects studies. The state, or where applicable local, agency must submit a copy of this 5

- year assessm ent, along with a revised annual network plan, to the Regional Administrator. The assessments are due every five years beginning July 1, 2010.

(e) All proposed additions and discontinuations of SLAMS monitors in annual monitoring network plans and periodic network assessments are subject to approval according to § 58.14.

_______________________________________________________________________ 66 Annual Monitoring Network Report for Twenty

- three Districts in California

### APPENDIX B

For ozone, PM 10 , and PM 2.5 , the required minimum number of monitors are based on the population of the core

- based statistical area (CB SA) and the severity of the air qu ality fo r the pollutant in the CB SA. The tables below l ist the CB SAs, population of the CB SAs, and the site in each CB SA that is currently measuring the highest concentration . In all cases, sufficient monitoring exists

, and no additional monitoring is required.

Minimum Monitoring Requirements for O 3 , PM 10 , and PM 2.5

Ozone Minimum Monitoring Requirements for Ozone.

Bakersfield*^ Kern 839,361 0.089 Arvin

- DiGiorgio 2 8 0 Chico Butte 220,000 0.076 Paradise

- 4405 Airport Road 1 2 0 Los Angeles

- Long Beach

Anahiem* Los Angeles and Orange 12,828,837 0.099 Santa Clarita 4 19 0

Redding Shasta 177,223 0.068 Shasta Lake

- 13791 Lake Blvd 1 4 0
Riverside

- San Bernar dino

Ontario* Riverside and San Bernardino 4,224,851 0.107 Crestline 3 21 0

Sacramento

- Arden Arcade

Roseville* El Dorado, Placer, Sacramento,
and Yolo 2,149,127 0.09 Folsom

- Natoma Street 2 17 0

Santa Rosa* Sonoma 483,878 0.053 San ta Rosa

- 5 th Street^^ 1 2 0 Vallejo

- Fairfield* Solano 413,344 0.067 Vacaville

- Ulatis Drive 2 3 0 Yuba City Sutter and Yuba 166,892 0.073 Sutter Buttes^^^ 1 2 0

* Parts of these CBSAs are included in the geographical scope of this rep ort, and parts are within the geographical scope of the reports being completed by the districts. See Table 6a for the completed list of CBSAs in California. The numbers of active ozone monitors listed are for the entire C BSA (see below for site details) . Only ozone monitors that are part of the SLAMS and SPM networks are counted towards this monitoring requirement. Exceptional events are included in the determination of the design values.
^ The 3

- year average of the 4th highest concentration usually represents the design value. Prior to 2012, the highest concentrations in the Bakersfield CBSA

were measured at Arvin

- Bear Mountain, which had a 2010 design value of 0.104 ppm. The monitor at Arvin

- DiGiorgio, with a 3

- year average of the fourth highest concentration of 0.089 ppm, currently has the highest design value among sites with complete data over three years. ^^ The design value for the Healdsburg

- Municipal Airport site is likely higher than that for the Santa Rosa

- 5 th Street site, but data ar e not complete for 2011

- 2013 at Healdsburg. Nevertheless, the design value for the Healdsburg

- Municipal Airport site was well below the level of the federal 8

- hour standard in 2010 and for several years prior to that.
^^^ The Sutter Buttes site is a seasonal site (May

- October). 2011 data are 79% complete during the 6

- month monitoring period.

Ozone sites which are counted towards minimum monitoring requirements. CBSA Site CBSA Site CBSA Site
Arvin

- DiGorgio Chico

- East Auburn
Bakersfield

- California Paradise Cool
Bakersfield

- Municipal Airport Colfax
Edison CBSA Site Davis Maricopa Anderson Echo Summit Mojave Lassan Volcanic NP Elk Grove Oildale Redding Folsom Shafter Shasta Lake Lincoln North Highlands
Anahiem Bannin g

- Airport Placerville
Azusa Barstow Roseville
Burbank Blyth Sac

- Del Paso Compton Crestline Sac

- Goldenland Costa Mesa Elsinore Sac

- T St
Glendora Fontana Sloughhouse
La Habra Hesperia Tahoe City
Lancaster Indio Woodland Long Beach Jo shua Tree

- Black Rock Los Angeles

- North Main Joshua Tree

- Cottonwood CBSA Site Los Angeles

- Westchester Mira Loma Healdsburg Mission Viejo Palm Springs Santa Rosa North Long Beach Perris
Pasadena Phelan CBSA Site
Pico Riveria Redlands Valle jo
Pomona Riverside

- Rubidoux Vacaville
Reseda San Bernardino Fairfield
Santa Clarita Trona West Los Angeles Upland CBSA Site
Victorville Yuba City

- Almond
Westchester Sutte Buttes Yuba City Riverside

- San
Bernardino

- Ontario Sacramento

Arden
Arcade

Roseville

Vallejo

Fairfield Bakersfield Chico

Los Angeles

- Long Beach

Anahiem Redding

Santa Rosa # of Additonal
Monitors Needed CBSA County(ies) Population (2010 Census) 3

- Year Avg of the 4th Highest
Concentration Si te with the Highest 3

- Yr Avg of the 4th Highest
Concentration # of
Monitors Required # of Active
Monitors

_______________________________________________________________________ 67 Annual Monitoring Network Report for Twenty

- three Districts in CaliforniaPM2.5 1
Minimum Montoring Requirements for PM2.5 SLAMS.

Bakersfield* Kern 839,361 17.3 Bakersfield-410 E Planz 65 Bakersfield-California Ave 2 4 0 Chico Butte 220,000 10.1** Chico-East** 34** Chico-East** 1 1 0 Los Angeles-Long Beach-Anahiem* Los Angeles and Orange 12,828,837 12.5 Burbank & LA-North Main 31 Burbank & LA-North Main 3 12 0

Redding Shasta 177,223 5.7 Redding-Health Department 17 Redding-Health Department 0 1 0 Riverside-San Bernardino-Ontario* Riverside and San Bernardino 4,224,851 14.8 Mira Loma Van Buren 37 Mira Loma Van Buren 3 10 0

Sacramento-Arden Arcade-Roseville* El Dorado, Placer, Sacramento, and Yolo 2,149,127 10.4 Sacramento-DPM 36 Sacramento-DPM 3 6 0

Santa Rosa* Sonoma 483,878 8.5 Santa Rosa-5th St 22 Santa Rosa-5th St 0 1 0 Vallejo-Fairfield* Solano 413,344 9.6 Vallejo-304 Tuolumne St 30 Vallejo-304 Tuolumne St 0 2 0 Yuba City Sutter and Yuba 166,892 7.7 Yuba City-Almond 29 Yuba City-Almond 0 1 0

1 Design values are based on both FRM and FEM data. The total number of active PM2.5 monitors include both the filter-based FRMs and the continuous FEM PM2.5 monitors that are part of the SLAMS network. Exceptional events are included in the determination of the design values. * Parts of these CBSAs are included in the geographical scope of this report, and parts are within the geographical scope of the reports being completed by the districts. See Table 6a for the completed list of CBSAs in California. The numbers of active PM2.5 SLAMS monitors listed are for the entire CBSA (see below for site details). **The Chico-East site started on 4/2/2012. All monitors at the Chico-East site was relocated from the discontinued Chico-Manzanita site. The 2013 design values for the Chico CBSA were computed by combining the PM2.5 data from the two Chico locations (i.e., Chico-Manzanita and Chico-East).

PM2.5 SLAMS sites for which are counted towards minimum monitoring requirements. CBSA Site CBSA Site CBSA Site Bakersfield-California Auburn Bakersfield-E Planz Roseville Mojave Sac-Del Paso Ridgecrest CBSA Site Sac-Health Sac-T St CBSA Site Woodland Anahiem Azusa CBSA Site CBSA Site Burbank Big Bear City Compton Fontana Lancaster Indio Los Angeles-North Main Mira Loma CBSA Site Mission Viejo Ontario Napa North Long Beach Palm Springs Vallejo Pasadena Riverside-Magnolia Pico Riveria Riverside-Rubiduox CBSA Site Reseda San Bernardino South Long Beach Victorville CBSA County(ies) Population (2010 Census) 3-year Highest Annual Design Value (ug/m3) Site with the Highest 3- year Annual Design Value 3-year Highest 24-hr Design Value (ug/m3) # of Active SLAMS Sites # of Additional SLAMS Sites

Needed Site(s) with the 3-year Highest 24-hr Design Value # of Required SLAMS Sites

Yuba CityAlmond Santa Rosa

Vallejo-Fairfield Bakersfield

Los Angeles-Long Beach-Anahiem Chico-East

Redding Redding-Health Dept Sacramento-Arden ArcadeRoseville Chico

Santa Rosa

Yuba City Riverside-SanBernardinoOntario

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- three Districts in CaliforniaContinuous PM2.5 1
Minimum Montoring Requirements for continuous PM2.5 monitors.

Bakersfield* Kern 839,361 Bakersfield-California Bakersfield-California 1 3 0 Chico Butte 220,000 Chico-East Chico-East 1 3 0 Los Angeles-Long Beach-Anahiem* Los Angeles and Orange 12,828,837 Burbank & LA-North Main Burbank & LA-North Main 2 8 0

Redding Shasta 177,223 N/A N/A 0 0 0 Riverside-San Bernardino-Ontario* Riverside and San Bernardino 4,224,851 Mira Loma Van Buren Mira Loma Van Buren 2 8 0

Sacramento-Arden Arcade-Roseville* El Dorado, Placer, Sacramento, and Yolo 2,149,127 Davis-UCD Campus Sacramento-DPM 2 11 0

Santa Rosa* Sonoma 483,878 Santa Rosa-5th St Santa Rosa-5th St 0 1 0 Vallejo-Fairfield* Solano 413,344 Vallejo Vallejo 0 2 0 Yuba City Sutter and Yuba 166,892 Yuba City-Almond Yuba City-Almond 0 1 0

1 The CFR does not specify that continuous PM2.5 monitors have to be Federal Equivalent Methods (FEMs); therefore, this assessment includes both continuous FEM and non-FEM PM2.5 monitors. * Parts of these CBSAs are included in the geographical scope of this report, and parts are within the geographical scope of the reports being completed by the districts. See Table 6a for the completed list of CBSAs in California. The numbers of active continuous PM2.5 monitors listed are for the entire CBSA (see below for site details). ^ The required number of continuous PM2.5 monitor is one-half (round up) the total number of required PM2.5 SLAMS sites in each CBSA (40 CFR 58 Appendix A Section 4.7.2). ^^The number of active continuous PM2.5 monitors listed for each CBSA include both FEM and non-FEM monitors. N/A means that there is no continuous PM2.5 monitor in the CBSA.

Continuous PM2.5 sites for which are counted towards minimum monitoring requirements. CBSA Site CBSA Site CBSA Site Bakersfield Redding

-- Auburn Lebec Colfax Mojave CBSA Site Elk Grove Banning-Airport Folsom CBSA Site Crestline Lincoln Anahiem Elsinor Roseville Burbank Mira Loma Sac-Del Paso Glendora Riverside-Magnolia Sac-T St Los Angeles Riverside-Rubidoux Sloughhouse North Long Beach Upland Tahoe City Reseda Winchester Davis-UCD Santa Clarita South Long Beach CBSA Site CBSA Site CBSA Site Napa Chico-East Vallejo Gridley Paradise CBSA Site Vallejo-Fairfield Yuba City Yuba City-Almond

Chico Los Angeles-Long Beach-Anahiem SacramentoArden ArcadeRoseville

Santa Rosa # of Additional Continuous Monitors Needed CBSA County(ies) Population (2010 Census) Site with the Highest Annual Design Value

Santa Rosa Site with the Highest 24- hr Design Value # of Required Continuous Monitors^

Bakersfield

Riverside-San Bernardino-Ontario # of Active Continuous Monitors^^

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- three Districts in CaliforniaPM10 Minimum Montoring Requirements for PM10.

Bakersfield* Kern 839,361 134.3 Oildale 1-2 4 0 Chico Butte 220,000 59 Chico-East 0 1 0Los Angeles-Long BeachAnahiem* Los Angeles and Orange 12,828,837 77** Anaheim** 2-4 10 0
Redding Shasta 177,223 45.5 Shasta Lake 0 3 0Riverside-San BernardinoOntario* Riverside and San Bernardino 4,224,851 147 Mira Loma 6-10 17 0

Sacramento-Arden ArcadeRoseville* El Dorado, Placer, Sacramento, and Yolo 2,149,127 79.5 Auburn 2-4 11 0

Santa Rosa* Sonoma 483,878 54 Healdsburg 0-1 3 0 Vallejo-Fairfield* Solano 413,344 37.6 Napa 0-1 2 0 Yuba City Sutter and Yuba 166,892 56.1 Yuba City-Almond 0 1 0
* Parts of these CBSAs are included in the geographical scope of this report, and parts are within the geographical scope of the reports being completed by the districts. See Table 6a for the completed list of CBSAs in California. The numbers of active PM10 monitors listed are for the entire CBSA (see below for site details). **The Lancaster site reported a max concentration of 185.4 ug/m3 on May 28, 2013. This was not corrobrated by the collocated sampler and is being investigated. The next highest site for the Los Angeles-Long Beach-Anahiem CBSA is the Anaheim site.

PM10 FRM sites for which are counted towards minimum monitoring requirements. CBSA Site CBSA Site CBSA Site Bakersfield-California Banning-Airport Auburn Canebrake Barstow Colfax Oildale Crestline North Highlands Ridgecrest Fontana Roseville Hesperia Sac-Branch CBSA Site Indio Sac-Del Paso Anahiem Lucerne Valley Sac-Goldenland Azusa Mira Loma Sac-Health Dept Burbank Norco Sac-T St Lancaster Ontario West Sac Los Angeles-North Main Palm Springs Woodland Los Angeles-Westchester Perris Mission Viejo Redlands North Long Beach Riverside-Rubidoux CBSA Site Santa Clarita San Bernardino Napa South Long Beach Trona Vacaville Victorville CBSA Site CBSA Site CBSA Site Healdsburg Cloverdale Gunerneville CBSA Site Redding-Health Dept Anderson Shasta Lake SacramentoArdenArcadeRoseville

Los Angeles-Long BeachAnahiem Riverside-San Bernardino-Ontario

VallejoFairfield

Yuba City Yuba CityAlmond

Redding Santa Rosa Bakersfield

Chico Chico-East # of Required Monitors # of Active Monitors # of Additional Monitors Needed CBSA County(ies) Population (2010 Census) 2013 Max Daily Concentration

(ug/m3) Max Concentration Site

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- three Districts in California

### APPENDIX C

Supporting Documents included in the ANP (For example, EPA approval letters)

1. July 17, 2013. U.S. EPA letter, approving the seasonal ozone mon itoring sites included in this report.

2. August 5, 2013. ARB letter, requesting approval for the reduced sampling frequencies of the PM 2.5 monitors covered in this plan.

3. December 11, 2013. U.S. EPA letter, approving the relocation of the Portola site in Plumas County.

4. June 25, 2014. Placer County APCD letter, requesting approval of the Auburn and Lincoln site relocations in Placer County.

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- three Districts in California_______________________________________________________________________ 75 Annual Monitoring Network Report for Twenty

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- three Districts in California

### APPENDIX D

List of Abbreviations and Acronyms

APCD Air Pollution Cont rol District AQMD Air Quality Management District AQS Air Quality System
ARB Air Resources Board

CFR Code of Federal Regulations CBSA Core

- Based Statistical Area

FEM Federal equivalent method FRM Federal reference method

MSA Metropolitan Statistical Area

NAAQS National Ambient Air Quality Standard NO 2 Nitrogen dioxide

Pb Lead
PM 10 Particulate matter (0 to 10 microns aerodynamic diameter)
PM 2.5 Particulate matter (0 to 2.5 microns aerodynamic di ameter) PQAO Primary quality assurance organization

SIP State Implementation Plan SLAMS State and Local Air Monitoring Stations SO 2 Sulfur dioxide

U.S. EPA United States Environmental Protection Agency

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- three Districts in California