San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011



### San Joaquin Valley Air Pollution Control District

2011 Air Monitoring Network Plan

June 30, 2011

For Submittal to the U.S. Environmental Protection Agency in July 2011San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011



### San Joaquin Valley Unified Air Pollution Control Di strict

1990 E. Gettysburg Avenue Fresno, California 93726

(559) 230-6100

www.valleyair.orgSan Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2010 Air Monitoring Network Plan i 

### TABLE OF CONTENTS

Executive Summary ..................................

................................................... ................... 2 Introduction: Air Monitoring Network Plan requireme nts ................................................ . 3 Monitoring Objectives and Spatial Scales ...........

................................................... ......... 7
Ozone..............................................

................................................... ........................... 13
PAMS...............................................

................................................... .......................... 16 Particulate Matter (PM) ............................

................................................... .................. 17 PM10 Monitors in the Valley........................

................................................... ............... 18 PM2.5 Monitors in the Valley.......................

................................................... ............... 23 PM Collocation Requirements........................

................................................... ............ 30 Public Review of Changes to the PM2.5 Monitoring Ne twork ....................................... 30
Carbon Monoxide....................................

................................................... ................... 30 Nitrogen Dioxide...................................

................................................... ...................... 31
Sulfur Dioxide.....................................

................................................... ........................ 33
Lead ...............................................

................................................... ............................ 34
Toxics.............................................

................................................... ............................ 34
Green House Gases..................................

................................................... ................. 35
NCore..............................................

................................................... ........................... 35 Meteorology ........................................

................................................... ....................... 35 Summary of completed changes, January 2010 – July 2 011........................................ 37 Summary of planned changes, July 2011 – December 20 11........................................ 37
Stockton CBSA/MSA..................................

................................................... ................ 38
Modesto CBSA/MSA...................................

................................................... ............... 38
Merced CBSA/MSA....................................

................................................... ................ 38
Madera CBSA/MSA....................................

................................................... ................ 38
Fresno CBSA/MSA....................................

................................................... ................. 38
Hanford-Corcoran CBSA/MSA ..........................

................................................... ......... 38
Visalia-Porterville CBSA/MSA .......................

................................................... ............. 39
Bakersfield CBSA/MSA...............................

................................................... ............... 39 Data Submission Requirements.......................

................................................... .......... 39 Acronyms, Abbreviations, and Initialisms...........

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

Appendix A: Monitoring Site Descriptions Appendix B: Detailed SJV Monitoring Site Informatio n Appendix C: Comments and ResponsesSan Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2010 Air Monitoring Network Plan ii 

### LIST OF FIGURES

Figure 1 Map of Air Monitoring Sites in the San J oaquin Valley.................................... 1

LIST OF TABLES

Table 1 SJV Areas of Representation ...............

................................................... .......... 4
Table 2 Site Identification and AQS AIRS Codes....

................................................... .... 5 Table 3 San Joaquin Valley 2009 Population........

................................................... ...... 7 Table 4 Ambient Air Monitoring Sites in the San Jo aquin Valley Air Basin (Summary).. 9 Table 5 SLAMS Minimum Ozone Monitoring Requirement s ........................................ 13 Table 6 Ozone Requirements for the San Joaquin Val ley............................................ 14 Table 7a San Joaquin Valley Ozone Monitors (SLAMS) .............................................. 14 Table 7b San Joaquin Valley Ozone Monitors (SPM) .. ................................................ 16
Table 8 SJV PAMS sites ............................

................................................... ............... 17 Table 9 Minimum PM10 Monitoring Requirements ...... ................................................ 19 Table 10 PM10 Monitoring requirements for the Vall ey................................................ 1 9 Table 11a San Joaquin Valley PM10 SLAMS monitor in formation............................... 20 Table 11b San Joaquin Valley PM10 SPM monitor info rmation................................... 21 Table 12 San Joaquin Valley PM10 monitor types....

................................................... 22 Table 13 Minimum PM2.5 Monitoring Requirements.... ................................................ 24 Table 14 PM2.5 Monitoring requirements for the Val ley............................................... 2 4 Table 15a San Joaquin Valley PM2.5 SLAMS monitor i nformation.............................. 25 Table 15b San Joaquin Valley PM2.5 SPM monitor inf ormation.................................. 27 Table 16 San Joaquin Valley PM2.5 monitor types...

................................................... 28 Table 17 Carbon Monoxide Monitoring Stations in th e San Joaquin Valley ................. 31
Table 18 NO 2 

### Monitoring Stations in the San Joaquin Valley..... .................................. 32
Table 19a SO 2 

### Monitoring Station in the San Joaquin Valley...... ................................. 33 Table 19b Populations Weighted Emissions Index for the San Joaquin Valley............ 34 Table 20 Meteorological Parameter Monitoring Stati ons in the San Joaquin Valley .... 36San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2010 Air Monitoring Network Plan 

### iii The District’s Core Values and the District’s Air M onitoring Network

* Protect Public Health *
The District uses data collected from the Valley ai r monitoring network to generate daily air quality forecasts and, when needed, issue health advisories . The District also uses data collected from the Valley’s air monitoring network as the basis for lo ng-term attainment strategies and to track progress towards health-based air quality standards.



### * Active and effective air pollution control effort s with minimal disruption to the Valley’s economic prosperity *
The District uses air monitoring data to help deter mine what kind of air pollution control efforts are needed to achieve health-based air quality standards.



### * Outstanding Customer Service * * Accountability to the public *
The District’s website provides timely and easy pub lic access to data from the Valley’s real-time air monitors. The public can also access summaries of the previous seven days of air quality for ozone an d particulate matter.



### * Open and transparent public processes *
In addition to making air quality data available in real-time, the District uses air quality data in a variety of publicly available documents and reports. The Dist rict also conducts a public review period for annua l monitoring network plans.



### * Respect for the opinions and interest of all Vall ey residents *
The District has actively made daily air quality in formation available to Valley residents in a variet y of formats, from the District website to the media, an d even with air quality flags at schools. The Dist rict

considers public interests in establishing new air monitoring stations.



### * Ingenuity and innovation *
The District uses new and improved air monitoring t echniques as these techniques are approved by the

EPA. The District uses the latest science when sit ing air monitors. In turn, data collected from the

monitoring network contributes to ongoing scientifi c evaluations.



### * Continuous improvement *
The District evaluates the air monitoring network i n the annual Monitoring Network plan for opportunit ies for better data collection and greater efficiency. Furthermore, improved air monitoring is a continuo us effort; throughout the year, the District seeks out opportunities to improve the air monitoring networ k.



### * Recognition of the uniqueness of the San Joaquin Valley *
The San Joaquin Valley is an expansive and diverse area. The District sites air monitors to represent each type of area and each portion of the region.



### * Effective and efficient use of public funds *
An air monitoring network requires personnel, instr uments, parts, energy, and leases. The District ma kes the most of limited resources by structuring the ai r monitoring network in a way that optimizes person nel time and funding for instruments. The result is a robust air monitoring network that helps the Valley reach its air quality goals without unnecessary expenditu res.San Joaquin Valley Unified Air Pollution Control DistrictJune 30, 20112011 Air Monitoring Network Plan1Figure 1 Map of Air Monitoring Sites in the San Joaquin ValleySan Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 2 

### Executive Summary

The San Joaquin Valley Air Pollution Control Distri ct (SJVAPCD or District) operates an extensive network of air quality monitors throughou t the San Joaquin Valley (Valley) to support its mission of improving and protecting pub lic health. On a short term scale, District staff use the hourly readings from real-ti me monitors daily to generate an Air Quality Index (AQI) for each of the Valley’s eight counties. The AQI is displayed on the District website, in Valley media and the Real-time Air Advisory Network (RAAN), and as school air quality flags to communicate the curr ent state of air quality to Valley residents so they can keep air quality in mind as t hey plan their activities. The District also uses real-time air quality data to manage pres cribed burning, agricultural burning,

and residential wood combustion to ensure these act ivities do not make air quality unhealthy.

The Valley’s attainment status for the U.S. Environ mental Protection Agency’s (EPA) health-based air quality standards, the foundation of the District’s air quality attainment plans (such as the 2007 Ozone Plan , the 2008 PM2.5 Plan , and upcoming plans), and the studies that contribute to these plans are dete rmined by the monitoring data that is collected. As part of the District’s long-term eff orts to improve public health, air monitors collect data that is rigorously analyzed by laborat ory technicians and District staff. This

data is fundamental in the Valley’s effort to achieve im proved air quality and attainment of EPA’s health-based standards as quickly as possi ble.

The San Joaquin Valley covers an area of 23,490 squ are miles, and the area is home to one of the most challenging air quality problems in the nation. The Valley is

nonattainment for federal PM2.5 and ozone standards , is in attainment of the federal standards for lead, Nitrogen dioxide, Sulfur dioxid e, and Carbon monoxide. In addition, the Valley is an attainment/maintenance area for PM 10. The Valley is home to approximately 4 million residents, and includes sev eral major metropolitan areas, vast expanses of agricultural land, industrial sources, highways, and schools. This expansive and diverse area comprises many air quali ty needs, yet there are limited financial and personnel resources for air quality m onitoring.

Despite these limitations and challenges, the Distr ict maintains a robust air monitoring program. The District follows federal monitoring r equirements and guidelines to ensure an efficient and effective monitoring network. Thi s monitoring network plan describes the District’s approach for implementing federal ai r monitoring and quality control requirements and summarizes recent and upcoming cha nges to the monitoring network. As specified in 40 CFR 58.10(a), this plan is made available for public inspection at least 30 days prior to submission to EPA.San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 3 

### Introduction: Air Monitoring Network Plan requireme nts

Annual monitoring network plans review a region’s e xisting and proposed monitoring network in compliance with 40 CFR (Code of Federal Regulations) 58.10 as well as requirements linked to the District’s EPA 105 Grant . The annual monitoring network plans are updated and submitted to the EPA Regional Administrator each year, and each plan must be made available for public inspect ion for at least 30 days prior to submission to EPA. The plans are to provide for th e establishment and maintenance of an air monitoring network that may include the foll owing types of stations and equipment:

Abbreviation Full Name Description

ARM Approved Regional

Method A method that has been approved within a specific region for comparison to federal air quality standa rds. There are no ARM monitors in the San Joaquin Valley.

FEM Federal Equivalent

Method These monitors are considered to be equivalent to FRM monitors for the purpose of determining compliance with EPA’s health-based air quality

standards.

FRM Federal Reference

Method EPA defines how these monitors are to work, how they are to be engineered, and how they are to measure pollutants. These monitors are used to determine compliance with EPA’s health-based air quality standards.

NCore National Core Multipollutant monitoring stati ons; in California, these are operated by the California Air Resources Board (CARB)

PAMS Photochemical

Assessment Monitoring Station VOC (volatile organic compounds) speciation sites used in serious, severe, or extreme ozone nonattainment areas for precursor evaluation.

SLAMS State and Local Air

Monitoring Station Monitoring sites that are used for determinations o f compliance with federal air quality standards, thou gh they may be used for other purposes as well

SPM Special Purpose

Monitor Not included when showing compliance with the minimum air monitoring requirements; an example might include a temporary monitoring station set up in an area to measure short term air quality impact s of a source. Data collected from an SPM can be used for Regulatory purposes if the monitor has bee n operational for two years and if the monitor is an ARM, FEM, or FRM.

STN Speciated Trends

Network PM2.5 speciation stations that provide chemical speciation data of PMSan Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 4 

### The monitoring network plan should include a statem ent of purpose for each monitor and evidence that siting and operation of each moni tor meets the requirements of appendices A, C, D, and E of 40 CFR part 58. The p lan must contain the following information for each existing and proposed site (40 CFR 58.10 (b)):

• 

### The MSA, CBSA, CSA, or other area represented by th e monitor. MSA, CBSA,
and CSA are statistical-based definitions for metro politan areas provided by the Office of Management and Budget and the Census Bure au (see Table 1):

o MSA: Metropolitan statistical area

o CBSA: Core-based statistical area

o CSA: Combined statistical area

• 

### Air quality system (AQS) AIRS Code site identificat ion number (see Table 2)

• 

### Locations: street address and geographical coordina tes

• 

### Sampling and analysis methods for each measured par ameter

• 

### Operating schedules for each monitor

• 

### Monitoring objective and spatial scale of represent ativeness for each monitor (as defined in Appendix D to 40 CFR 58)

• 

### Any proposals to remove or move a monitoring statio n within 18 months of a plan submittal. Any proposed additions and discontinuat ions of SLAMS monitors are subject to approval according to 40 CFR 58.14

• 

### Each air monitor is sited to satisfy at least one o f three specific criteria:

o Population (see Table 3)

o Generally consistent pollution concentrations

o A specific geographic scale

Table 1 SJV Areas of Representation

Title Code

Combined Statistical Area (CSA) CSA Code

Fresno-Madera CSA 260

Metropolitan Statistical Area (MSA) Core-based Stat istical Area (CSBA) Code

Bakersfield 1 12540

Fresno 23420

Hanford-Corcoran 25260

Madera 31460

Merced 32900

Modesto 33700

Stockton 44700

Visalia - Porterville 47300San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 5 

### SJV Areas of Representation

Title Code

Counties Federal Information Processing Standard (FIPS) Code

Fresno 06019

Kern 06029

Kings 06031

Madera 06039

Merced 06047

Stanislaus 06099

San Joaquin 06077

Tulare 06107

1 Monitors from both the District and the Kern Count y Air Pollution Control District can be counted in determining compliance with minimum monitoring requirements for the Bakersfield MSA. However, only monitors locat ed within

the District’s boundaries are included in this netw ork plan.



### Table 2 Site Identification and AQS AIRS Codes

MSA/CBSA: Fresno County: Fresno

Site Name AIRS Code Agency

Clovis–Villa 060195001 SJVAPCD

Fresno--Drummond 060190007 SJVAPCD

Fresno–First 060190008 CARB

Fresno–Pacific 060195025 SJVAPCD Fresno–Sky Park 060190242 SJVAPCD

Huron 060192008 SJVAPCD

Parlier 060194001 SJVAPCD Tranquillity 060192009 SJVAPCD

MSA/CBSA: Bakersfield County: Kern (Valley Portion)

Site Name AIRS Code Agency Arvin–Di Giorgio 060295002 CARB

Bakersfield–California 060290014 Shared 2

Bakersfield–Planz 060290016 CARB

Edison 060290007 CARB

Lebec 060292009 SJVAPCD Maricopa 060290008 SJVAPCD

Oildale 060290232 CARB

Shafter 060296001 Shared 1San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 6 

### Site Identification and AQS AIRS Codes

MSA/CBSA: Hanford – Corcoran County: Kings

Site Name AIRS Code Agency

Corcoran–Patterson 060310004 SJVAPCD

Hanford--Irwin 060311004 SJVAPCD

Santa Rosa Rancheria 060310500 Tachi-Yokut Tribe

MSA/CBSA: Madera County: Madera

Site Name AIRS Code Agency Madera–City 060392010 SJVAPCD Madera–Pump Yard 060390004 SJVAPCD

MSA/CBSA: Merced County: Merced

Site Name AIRS Code Agency

Merced–Coffee 060470003 SJVAPCD

Merced–M Street 060472510 SJVAPCD

MSA/CBSA: Stockton County: San Joaquin

Site Name AIRS Code Agency

Manteca 060772010 SJVAPCD

Stockton--Hazelton 060771002 CARB Stockton–Wagner/Holt 060773010 SJVAPCD Tracy–Airport 060773005 SJVAPCD

MSA/CBSA: Modesto County: Stanislaus

Site Name AIRS Code Agency

Modesto–14 th Street 060990005 CARB

Turlock 060990006 SJVAPCD

MSA/CBSA: Visalia – Porterville County: Tulare

Site Name AIRS Code Agency

Porterville 061072010 SJVAPCD Sequoia–Ash Mountain 061070009 National Park Servic e Sequoia–Lower Kaweah 061070006 National Park Servic e Visalia–Airport 061073000 SJVAPCD

Visalia–Church 061072002 CARB

1 Site operated by CARB and SJVAPCD

2 Site operated by CARB and one temporary monitor op erated by SJVAPCD

.San Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 7



### Table 3 San Joaquin Valley 2009 Population

County Total County

Population Major Urban Area

Pop > 100,000 Urban Area Pop

< 100,000 and > 50,000

Fresno 942,298 Fresno Clovis

Kern (Entire County) 827,173 Bakersfield Delano

Kern (Valley Portion) 686,967 Bakersfield Delano

Kings 154,743 -- Hanford

Madera 152,331 -- Madera

Merced 256,450 -- Merced

San Joaquin 689,480 Stockton Lodi, Manteca, Tracy

Stanislaus 526,383 Modesto Turlock

Tulare 441,481 Visalia Porterville, Tulare

SJV Total 3,850,133

Data from California Department of Finance E-4 Popu lation Estimates for Cities, Counties and the State

, 2001-2009, with 2000 Benchmark. Estimates for 1/1/2 010 are not yet available.



### There are several network plan requirements that pe rtain specifically to PM2.5 monitoring. For example, the monitoring network pl an must identify which sites are suitable and which are not suitable for comparison against the annual PM2.5 national ambient air quality standards (NAAQS) as described in 40 CFR 58.30. The plan must also document how agencies provide for public revie w of changes to the PM2.5 monitoring network when the change impacts the loca tion of a violating PM2.5 monitor or the creation/change to a community monitoring zo ne. If the District uses spatial averaging, a description of the proposed use of spa tial averaging for purposes of making comparisons to the annual PM2.5 NAAQS as req uired in Appendix N to part 50 should be included. Agencies should submit any pub lic comments received from PM2.5 monitoring changes in the submittal of the network plan.

Monitoring Objectives and Spatial Scales

Appendix D to 40 CFR Part 54 identifies three basic monitoring objectives :

• 

### Provide air pollution data to the general public in a timely manner ( timely/public )

• 

### Support compliance with ambient air quality standar ds and emissions strategy development ( standards/strategy )

• 

### Support for air pollution research studies ( research support ) Appendix D then identifies several general monitori ng site types to meet the objectives:

• 

### Sites located to determine the highest concentrations in the area covered by the network

• 

### Population oriented sites to measure typical concentrations in areas o f high population density

• 

### Source impact sites to determine the impact of significant sourc es or source categories on air qualitySan Joaquin Valley Unified Air Pollution Control Di strict June 30, 2011

2011 Air Monitoring Network Plan 8

• 

### General/background sites determine background concentration levels

• 

### Regional transport sites located to determine the extent of regional pollut ant transport among populated areas and in support of s econdary standards

• 

### Sites located to measure air pollution impacts on v isibility, vegetation damage, or other welfare-related impacts

Appendix D also identifies several scales of spatia l representativeness, described in terms of physical dimensions of the air parcel or z one where air quality is expected to be reasonably consistent around the monitor. The m onitor thus represents that area, not just the point of the monitor. The spatial scales are:

• 

### Microscale : an area ranging from several meters up to about 1 00 meters

• 

### Middle scale : an area covering between about 100 meters to 0.5 kilometers

• 

### Neighborhood scale : covering an area between 0.5 and 4.0 kilometers i n

range

• 

### Urban scale : covering an area of city-like dimensions, from ab out 4 to 50
kilometers

• 

### Regional scale : covering a rural area of reasonably homogeneous geography without large sources, extending from ten s to hundreds of

kilometers

• 

### National and global scales : representing concentrations characterizing the nation and the globe as a whole

New monitoring stations and new monitors must meet EPA siting criteria. A particular site might be appropriate for one or more pollutant s. Some sites might be appropriate for all air pollutant monitoring, while other sites might only be appropriate for a particular pollutant. The District balances a wide range of p ollutant siting criteria, spatial scales, monitoring objectives, and practical concerns as it plans and operates its monitoring

network. Table 4 summarizes all the ambient air mon itoring sites in the San Joaquin Valley Air Basin.San Joaquin Valley Unified Air Pollution Control DistrictJune 30, 20112011 Air Monitoring Network Plan9Table 4 Ambient Air Monitoring Sites in the San Joaquin Valley Air Basin (Summary)As of June 1, 2011MSA, CountySite NameAddressParameters MonitoredClovis-Villa908 N. Villa Ave.,Clovis, CA 93612Ozone, PM10 FRM, PM2.5 BAM/FEM, CO, NO2, NMHC,NMOC (PAMS), wind speed, wind direction, outdoortemperature, relative humidity, barometric pressure, solarradiationFresno-Drummond4706 E. DrummondSt., Fresno, CA 93725Ozone, PM10 FRM, CO, NO2, wind speed, wind direction,outdoor temperature, barometric pressureFresno-First3425 N. First St,Fresno CA 93726Ozone, PM10 FRM, PM10 BAM, PM2.5 FRM, PM2.5BAM, CO, NO2, SO2, toxics, wind speed, wind direction,outdoor temperature, relative humidity, barometricpressureFresno,FresnoFresno-Pacific1716 Winery, Fresno,CA 93726PM2.5 FRMFresno-Sky Park4508 Chennault Ave,Fresno, CA 93722Ozone, CO, NO2, wind speed, wind direction, outdoortemperatureHuron16875 4thSt., Huron,CA 93234PM2.5 BAM, barometric pressureParlier9240 S. RiverbendAve., Parlier, CA93648Ozone, NO2, NMOC (PAMS), NMHC, wind speed, winddirection, outdoor temperature, relative humidity,barometric pressure, solar radiationTranquillity32650 W. Adams,Tranquillity, CA 93668Ozone, PM2.5 BAM FEM, wind speed, wind direction,outdoor temperature, barometric pressureSan Joaquin Valley Unified Air Pollution Control DistrictJune 30, 20112011 Air Monitoring Network Plan10MSA, CountySite NameAddressParameters MonitoredArvin-Di Giorgio19405 Buena VistaBlvd, Arvin, CA 93203Ozone, outdoor temperatureBakersfield-Planz401 E. Planz Rd.,Bakersfield CA 93307PM2.5 FRMBakersfield-California5558 California Ave.,Bakersfield, CA 93309Ozone, PM10 FRM, PM10 BAM/FEM (temporarilyoperated by the SJVAPCD), PM2.5 FRM, PM2.5BAM/FEM, NO2, toxics, Cr6+, wind speed, wind direction,outdoor temperature, relative humidity, barometricpressure, solar radiationBakersfield,KernEdisonJohnson Farm-ShedRd, Edison, CA 93320Ozone, NO2, wind speed, wind direction, outdoortemperatureLebecBeartrap Road (no #),Lebec, CA 91350PM2.5 BAM, wind speed, wind direction, outdoortemperature, relative humidity, barometric pressure, solarradiationMaricopa755 Stanislaus St.,Maricopa, CA 93352Ozone, wind speed, wind direction, outdoor temperature,barometric pressureOildale3311 Manor St,Oildale, CA 93308Ozone, PM10 FRM, wind speed, wind direction, outdoortemperatureShafter578 Walker St,Shafter, CA 93263Ozone, NO2, NMOC (PAMS), NMHC, wind speed, winddirection, outdoor temperature, relative humidity,barometric pressure, solar radiationCorcoran-Patterson1520 Patterson Ave,Corcoran, CA 93212PM10 FRM, PM10 TEOM, PM2.5 FRM, PM2.5 BAM/FEM,wind speed, wind direction, outdoor temperature,barometric pressureHanford –Corcoran,KingsHanford-Irwin807 S. Irwin St,Hanford, CA 93230Ozone, PM10 FRM, PM2.5 BAM/FEM, NO2, wind speed,wind direction, outdoor temperature, barometric pressureSanta Rosa Rancheria17225 Jersey Ave.,Lemoore, CA 93245Ozone, PM10, meteorologySan Joaquin Valley Unified Air Pollution Control DistrictJune 30, 20112011 Air Monitoring Network Plan11MSA, CountySite NameAddressParameters MonitoredMadera-City28261 Avenue 14,Madera, CA 93638Ozone, PM10 TEOM, PM2.5 BAM/FEM, wind speed, winddirection, outdoor temperature, barometric pressure,relative humidity, solar radiationMadera,MaderaMadera-Pump YardAv 8 and Road 29 1/2,Madera, CA 93637Ozone, NO2, NMOC (PAMS), NMHC, wind speed, winddirection, outdoor temperature, relative humidity,barometric pressure, solar radiationMerced-Coffee385 S. Coffee St.,Merced, CA 95340Ozone, PM2.5 BAM/FEM, NO2, wind speed, winddirection, outdoor temperature, barometric pressureMerced,Merced Merced-M Street2334 M Street,Merced, CA 95340PM10 FRM, PM2.5 FRMStockton-Hazelton1593 E. Hazelton St.,Stockton, CA 95205Ozone, PM10 FRM, PM2.5 FRM, PM2.5 BAM, CO, NO2,toxics, wind speed, wind direction, outdoor temperature,relative humidityStockton-Wagner/Holt8778 Brattle Pl.,Stockton, CA 95209PM10 FRMManteca530 Fishback Rd.,Manteca, CA 95337PM2.5 BAM/FEM, PM10 (TEOM), wind speed, winddirection, outdoor temperature, barometric pressureStockton,San JoaquinTracy-Airport5749 S. Tracy Blvd.,Tracy, CA 95376Ozone, PM10 TEOM, PM2.5 BAM, NO2, wind speed, winddirection, outdoor temperature, barometric pressure, radioacoustic sounding system (RASS)Modesto-14th Street814 14th Street,Modesto, CA 95354Ozone, PM10 FRM, PM2.5 FRM, PM2.5 BAM, CO, windspeed, wind direction, outdoor temperature, barometricpressureModesto,StanislausTurlock1034 S. Minaret St.,Turlock, CA 95380Ozone, PM10 FRM, PM2.5 BAM FEM, CO, NO2, windspeed, wind direction, outdoor temperature, barometricpressureSan Joaquin Valley Unified Air Pollution Control DistrictJune 30, 20112011 Air Monitoring Network Plan12MSA, CountySite NameAddressParameters MonitoredPorterville1839 S. Newcomb St.,Porterville, CA 93257Ozone, PM2.5 BAM, wind speed, wind direction, outdoortemperature, barometric pressureSequoia-Ash MountainAsh Mountain,Sequoia National ParkCAOzone, PM2.5 FRM, PM2.5 BAM, wind speed, winddirection, outdoor temperature, relative humidity,solarradiationSequoia-Lower KaweahLower KaweahCampground, SequoiaNational Park, CAOzone, wind speed, wind direction, outdoor temperature,relative humidity, solar radiationVisalia-AirportAirport, Visalia, CA93291wind speed, wind direction, outdoor temperature, relativehumidity, barometric pressure, solar radiation, radioacoustic sounding system (RASS)Visalia –Porterville,TulareVisalia-Church310 N. Church St.,Visalia, CA 93291Ozone, PM10 FRM, PM2.5 FRM, PM2.5 BAM, NO2, windspeed, wind direction, outdoor temperature, barometricpressureSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 13 

### Ozone

Ozone is formed when its precursors (oxides of nitr ogen (NOx) and volatile organic compounds (VOC)) chemically react in the presence o f sunlight. The Valley’s topography, low precipitation levels, high temperat ures, subsidence inversions, and light

winds are conducive to elevated ozone levels. Wind s (at ground level or at higher altitudes) transport pollutants from other basins i nto the Valley, within the Valley to areas downwind, and from the Valley into other regi ons.

As shown in Table 5, the Valley’s ozone network mee ts the monitoring requirements as listed in Table D-2 of Appendix D to Part 58. Ozon e monitoring site requirements are based on MSA population (see Table 3) and design va lues (see Table 6). Sites are intended to represent population exposures and maxi mum concentrations so most ozone monitors are representative of neighborhood a nd regional scales (see Table 7). The Valley’s SLAMS ozone monitors are continuous an alyzers that detect ozone through ultraviolet absorption. As continuous devi ces, these monitors meet the “Timely/Public” objective, providing District staff with the data used in AQI forecasting and reporting. The Valley’s ozone monitoring sites are shown in Table 7.

Table 5 SLAMS Minimum Ozone Monitoring Requirement s

(Table D-2 of Appendix D to Part 58)

Number of monitors required if: MSA population, based

on latest available census figures Most recent 3-year design

value concentrations ≥ 85% of any ozone NAAQS Most recent 3-year design

value concentrations < 85% of any ozone NAAQS

> 10 million 4 2

4 – 10 million 3 1

350,000 – < 4 million 2 1

50,000 – < 350,000 1 0San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 14



### Table 6 Ozone Requirements for the San Joaquin Val ley

Metropolitan
Statistical Area (MSA) 2009

Population Highest

2006-2008
Ozone Design

Value in MSA (ppb) 1 ≥ 85% of

2008 ozone NAAQS (75 ppb) 1 Number of

monitors required (Table 5) Number of

active
SLAMS

ozone monitor

sites

Bakersfield 827,173 2 105 Yes 2 6 2

Fresno 942,298 100 Yes 2 6

HanfordCorcoran 154,743 91 Yes 1 1

Madera 152,331 84 Yes 1 2

Merced 256,450 90 Yes 1 1

Modesto 526,383 89 Yes 2 2

Stockton 689,480 83 Yes 2 2

Visalia -

Porterville 441,481 103 Yes 2 2

1 These data are preliminary. Air quality data may in clude data influenced by exceptional events and/or data completeness and substitution require ments.

2 The population listed for Bakersfield here reflect s the population for all of Kern County, not just the Valley portion. Air monitors in the Eastern Kern Air District would count towards the monitors required for the Bakersfield MSA. However, the “ Number of active ozone monitors” listed here includes those in the San Joaquin Valley Air Basi n only.



### Table 7a San Joaquin Valley Ozone Monitors (SLAMS)

As of June 1, 2011

MSA County Site Scale Site Type Monitoring Objective Clovis–Villa Neighborhood Population

Fresno–

Drummond Neighborhood Population, Regional transport

Fresno–

First Neighborhood Population

Fresno-- Sky

Park Neighborhood Population, Regional transport Fresno Fresno

Parlier Neighborhood High Concentration, Regional transport 1, 2, 3San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 15



### San Joaquin Valley Ozone Monitors (SLAMS)

MSA County Site Scale Site Type Monitoring Objective

Arvin-Di Giorgio Neighborhood High Concentration, Regional transport

BakersfieldCalifornia Neighborhood Population

Edison Neighborhood High concentration, Regional transport

Maricopa Neighborhood Regional transport

Oildale Neighborhood Regional transport Bakersfield Kern

Shafter Neighborhood General/background 1, 2, 3

MSA County Site Scale Site Type Monitoring Objective

HanfordCorcoran Kings HanfordIrwin 1 Neighborhood Population 1, 2, 3

MSA County Site Scale Site Type Monitoring Objective

Madera– Pump Yard Neighborhood General/background Madera Madera Madera- City Neighborhood Population 1, 2, 3

MSA County Site Scale Site Type Monitoring Objective

Merced Merced Merced–
Coffee Neighborhood Population 1, 2, 3

MSA County Site Scale Site Type Monitoring Objective

Stockton–

Hazelton Neighborhood Population
Stockton San

Joaquin Tracy--

Airport Neighborhood Regional transport 1, 2, 3

MSA County Site Scale Site Type Monitoring Objective

Modesto–

14 th Street Neighborhood Population
Modesto Stanislaus Turlock Neighborhood Population 1, 2, 3San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 16



### San Joaquin Valley Ozone Monitors (SLAMS)

MSA County Site Scale Site Type Monitoring Objective

Visalia–
Church Neighborhood Population Visalia -

Porterville Tulare Porterville Neighborhood Population 1, 2, 3

1 – Standards/Strategy 2 – Research Support 3 – Timely/Public

1 Shutdown of the Corcoran-Patterson ozone monitor oc curred in November 2009. The monitor was

reinstalled at the reconstructed Hanford-Irwin mo nitoring site in February 2010. During the months in between, the monitor was serviced, calibrated and tested.



### Table 7b San Joaquin Valley Ozone Monitors (SPM)

As of June 1, 2011

MSA County Site Scale Site Type Monitoring Objective

Fresno Fresno Tranquillity 1 Urban
Scale Population 3

HanfordCorcoran Kings Santa Rosa Rancheria 2 Tribal monitor

Sequoia -Ash Mountain 1 Regional Regional transport 3 Visalia -

Porterville Tulare Sequoia -Lower Kaweah 1 Regional Regional transport 3

3 – Research Support Timely/Public

1 These SPMs can be used for Regulatory purposes.

2 The status of this Tribal monitor is not known.



### PAMS

The monitoring objective of Photochemical Assessmen t Monitoring Stations is research support. Federal regulations (Clean Air Act Sectio n 182 and 40 CFR 58) require serious, severe, and extreme ozone nonattainment ar eas to have PAMS sites to take speciated measurements of ozone precursors and allo w for better understanding of the effect of precursors, control measures, and photoch emistry on ozone formation. PAMS sites measure ozone, NOx, speciated VOC (NMOC and N MHC), CO, and meteorology concurrently.

There are four classifications of PAMS sites:

• 

### Type 1: Background sites upwind of urban areas, wh ere ozone concentrations are presumed not to be influence d by nearby urban emissions

• 

### Type 2: Maximum ozone precursor emissions sites, t ypically located in an urban center, where emissions strength s are the greatest

• 

### Type 3: Maximum ozone concentration sites, intende d to show the highest

ozone concentrationsSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 17 • 

### Type 4: Extreme downwind monitoring sites, which a re expected to capture concentrations of transported pollutants b ut have lower ozone

concentrations due to a lack of more local emissions sources (currently not required for the SJV)

As shown in Table 8, the District has a total of si x PAMS sites configured as two small networks, one centered around Fresno and one around Bakersfield. The PAMS program operates from June 1 through August 31 ever y year on a 1 in 3 day sampling schedule. At least four, three-hour integrated sam ples are collected each sampling day, referred to as a “Trend Day.” However, additional samples are collected on “Episode Days,” days that are forecasted to have high ozone concentrations. The goal is to sample on three to five multi-day episodes in an oz one season.

Table 8 SJV PAMS sites

As of June 1, 2011

Type 1: Upwind/Background site Madera-Pump Yard

Type 2: Maximum precursor emissions Clovis-Villa Fresno MSA

Type 3: Maximum ozone concentrations Parlier

Type 1: Upwind/Background site Shafter

Type 2: Maximum precursor emissions Replacement site under

construction 1 Bakersfield MSA

Type 3: Maximum ozone concentrations Arvin 2

1 Bakersfield–Golden was shut down for relocation in December 2009. The District plans to have the repl acement site, Bakersfield-Muni, operational in October 2 011. Bakersfield-Muni, will begin reporting data in O ctober 2011. See page 39 for more information.

2 Arvin-Bear Mountain Blvd. site closed. CARB plans to construct the Arvin-Di Giorgio site for PAMS and is finalizing details before the project beg ins.



### Particulate Matter (PM)

Particulate matter (PM) can be emitted directly as primary PM, and it can form in the atmosphere through chemical reactions of precursors to form secondary PM. Primary PM can be emitted either naturally (windblown dust and wildfires) or from human (anthropogenic) activity: agricultural operations, industrial processes, combustion of wood and fossil fuels, construction and demolition activities, and entrainment of road dust. The resulting ambient PM mixture includes ae rosols consisting of components of nitrates, sulfates, elemental Carbons, organic Carb on compounds, acid aerosols, trace metals, geological materials, etc. Under current r egulations, particulate matter (PM) is differentiated by particle size as opposed to compo sition. Federal air quality standards

differentiate two size fractions of PM: PM that is 10 microns or less in diameter (PM10)

and the smaller subset that is 2.5 microns or less in diameter (PM2.5).

The Valley’s comprehensive particulate field study is the California Regional Particulate Air Quality Study (CRPAQS). CRPAQS monitoring occu rred between December 1999San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 18 

### and February 2001 through the use of over 70 SPM PM 10 sites and 50 SPM PM2.5
sites. Researchers have used CRPAQS measurements f or database development, analysis, and modeling. A final report synthesizin g all CRPAQS analysis and updating the conceptual understanding of particulates is exp ected to be completed in 2012. In addition to CRPAQS, other studies assess particulat e emissions from agricultural operations, unpaved and paved road particulate emis sions, and particulate formation in fog episodes. The design of the Valley’s current P M network is an outgrowth of the results and analysis from CRPAQS.

The Valley’s surrounding mountain ranges contribute to PM retention. Over the summer, long periods with little or no rainfall res ult in extreme drying of soils, increasing

emissions from traffic movement and mechanical dist urbance. Winter brings rainfall, but also creates an atmospheric environment that fo rms more secondary particulates. The Valley’s frequent and severe temperature invers ions block the normal rising air and trap particulates close to the ground, especially d uring the winter months.

The Valley’s PM monitoring network includes Federal Reference Method (FRM) monitors, Federal Equivalent Method (FEM) monitors, and Non-FRM/FEM monitors.

FRM monitors for PM are manual filter-based monitor s; samples are collected on either a one-in-six day sampling schedule or a one-in-thre e day sampling schedule. FRM monitors meet the “Standards/Strategy” objective, h elping agencies determine the Valley’s attainment status and helping shape the st rategies for reaching or maintaining PM attainment. FRM filters can also be analyzed fo r PM speciation, so they are sometimes used for “Research Support” objectives as well.

Beta Attenuation Monitors (BAM) and Tapered Element Oscillating Microbalance (TEOM) monitors are continuous, near real-time moni tors that provide the hourly PM data used in AQI and Smoke Management System (SMS) burn allocations. Data from

these monitors are also used in hazard reduction bu rning allocations and in residential wood burning declarations. As such, these monitors help meet the “Timely/Public” objective.
Not all real-time monitors meet the “Standards/Stra tegy” objective because they do not meet the rigorous engineering design, quality assur ance, and quality control standards necessary for comparison to the NAAQS. An FEM moni tor is often a real-time monitor that has been designated by EPA as being equivalent to FRM monitors. FEMs satisfy both the “Standards/Strategy” objective and the “Ti mely/Public” objective. All of the Valley’s TEOMs are FEMs, and some of the Valley’s B AMs are FEMs.

PM10 Monitors in the Valley

The San Joaquin Valley has been redesignated to att ainment for PM10, and the

District’s 2007 PM10 Maintenance Plan and ongoing PM10 monitoring will assure continued compliance with federal standards. The m inimum number of PM10 sites required per MSA is shown in Table 9 and the PM10 m onitoring requirements for the San Joaquin Valley are shown in Table 10. Tables 11a, 11b, and 12 summarize the Valley’s SLAMS and SPM PM10 monitoring stations, re spectively.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 19



### Table 9 Minimum PM10 Monitoring Requirements

(Table D-4 of Appendix D to Part 58) (A range is presented, and the actual number of sta tions per area is jointly determined by EPA, the State, and the local agency)

Population category High concentration:

Ambient

concentrations

exceed the PM10 NAAQS by 20% or more ( ≥ 180 μg/m3) Medium concentration:

Ambient concentrations

exceed 80% of the PM10 NAAQS ( > 120 μg/m3) Low concentration:

Ambient

concentrations less

than 80% of the PM10 NAAQS ( < 120 μg/m3), or no design value

> 1,000,000 6 – 10 4 – 8 2 – 4

500,000 – 1,000,000 4 – 8 2 – 4 1 – 2

250,000 – 500,000 3 – 4 1 – 2 0 – 1

100,000 – 250,000 1 – 2 0 – 1 0



### Table 10 PM10 Monitoring requirements for the Vall ey

PM10

Metropolitan
Statistical Area (MSA) County 2009 Population 24-hour 2009

Highest

concentration in MSA (μg/m3) 2 Monitors

required 3 Actual

# of
SLAMS

sites in
MSA Actual

# of
SPM

sites in
MSA Bakersfield Kern 827,173 1 138 2 – 4 2 4

Fresno Fresno 942,298 84 1 – 2 3 1

HanfordCorcoran Kings 154,743 118 0 – 1 2 2 Madera Madera 152,331 - 1 1 1 Merced Merced 256,450 64 0 – 1 1 1

Modesto Stanislaus 526,383 65 1 – 2 2

Stockton San

Joaquin 689,480 61 1 – 2 2 1

Visalia -

Porterville Tulare 441,481 92 0 - 1 1

1 The population listed for Bakersfield here reflects the population for all of Kern County, not just th e Valley portion.

Air monitors in the Eastern Kern Air District wo uld count towards the monitors required for the Bak ersfield MSA. However, the “Actual # of monitors in MSA” liste d here includes those in the San Joaquin Valley Air Basin only.

2 Max PM10 Data does not include any pending Excepti onal Events.

3 PM10 data does not include collocated monitors.

4 One temporary PM10 monitor.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 20



### Table 11a San Joaquin Valley PM10 SLAMS monitor in formation

MSA/CBSA: Fresno County: Fresno

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

FresnoDrummond Neighborhood Population Standards/Strategy Research Support 1:6

Standards/Strategy Research Support 1:6 Fresno-First Neighborhood High
Concentration Research Support

Timely/Public 1-Hour

Clovis-Villa Neighborhood Population Standards/Strategy Research Support 1:6

MSA/CBSA: Bakersfield County: Kern

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Oildale Neighborhood Population Standards/Strategy Research Support 1:6

1:6 Bakersfield-
California Neighborhood Population Standards/Strategy Research Support 1-Hour 1

MSA/CBSA: Hanford – Corcoran County: Kings

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Hanford-Irwin Neighborhood Population Standards/Strategy Research Support 1:6

Standards/Strategy Research Support 1:3CorcoranPatterson Neighborhood High
Concentration Research Support

Timely/Public 1-Hour

MSA/CBSA: Madera County: Madera

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Madera-City Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Merced County: Merced

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Merced-M Street Neighborhood Representative

concentration Standards/Strategy

Research Support 1:6San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 21



### San Joaquin Valley PM10 SLAMS monitor information

MSA/CBSA: Stockton County: San Joaquin

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Manteca Neighborhood Population Standards/Strategy Research Support 1-Hour

StocktonHazelton Neighborhood Population Standards/Strategy Research Support 1:6

Stockton-Wagner/

Holt Neighborhood Population Standards/Strategy Research Support 1:6

Tracy-Airport Neighborhood Regional transport Research Support

Timely/Public 1-Hour

MSA/CBSA: Modesto County: Stanislaus

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Modesto-14 th

Street Neighborhood Population Standards/Strategy Research Support 1:6

Turlock Neighborhood Population Standards/Strategy Research Support 1:6

MSA/CBSA: Visalia – Porterville County: Tulare

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Visalia-Church Neighborhood Population Standards/Strategy Research Support 1:6

1 Temporary monitor



### Table 11b San Joaquin Valley PM10 SPM monitor info rmation

MSA/CBSA: Hanford – Corcoran County: Kings

Site Name Scale Site Type Monitoring Objective Sampling

Schedule

Hanford-Irwin 1 Neighborhood Population Research Support Timely/Public 1-Hour

1 This is a new SPM site. Data can be used for Regul atory purposes after the site has been operational for two

years.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 22



### Table 12 San Joaquin Valley PM10 monitor types

Instrument Type Monitor Type MSA/CBSA: Fresno County: Fresno FRM FEM SLAMS SPM

Site Name

Clovis-Villa 1 1

Fresno-Drummond 1 1

1 1 Fresno-First 1 1

Total SLAMS/SPM 3 1

Instrument Type Monitor Type MSA/CBSA: Bakersfield County: Kern FRM FEM SLAMS SPM

Site Name

1 1 Bakersfield-California 1 1 1

Oildale 1 1

Total SLAMS/SPM 2 1

Instrument Type Monitor Type MSA/CBSA: Hanford – Corcoran County: Kings FRM FEM SLAMS SPM

Site Name

1 2 1 Corcoran-Patterson 1 1

1 1 Hanford-Irwin 1 1

Santa Rosa Rancheria 3 Tribal Monitor

Total SLAMS/SPM 2 2

Instrument Type Monitor Type MSA/CBSA: Madera County: Madera FRM FEM SLAMS SPM

Site Name

Madera-City 1 1

Total SLAMS/SPM 1

Instrument Type Monitor Type MSA/CBSA: Merced County: Merced FRM FEM SLAMS SPM

Site Name

Merced-M Street 1 1

Total SLAMS/SPM 1San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 23 

### San Joaquin Valley PM10 monitor types

Instrument Type Monitor Type MSA/CBSA: Stockton County: San Joaquin FRM FEM SLAMS SPM

Site Name

Manteca 1 1

Stockton-Hazelton 1 1

Stockton-Wagner/Holt 1 1

Tracy-Airport 1 1

Total SLAMS/SPM 2 2

Instrument Type Monitor Type MSA/CBSA: Modesto County: Stanislaus FRM FEM SLAMS SPM

Site Name

Modesto-14 th Street 1 1

Turlock 1 1

Total SLAMS/SPM 2

Instrument Type Monitor Type MSA/CBSA: Visalia – Porterville County: Tulare FRM FEM SLAMS SPM

Site Name

Visalia-Church 1 1

Total SLAMS/SPM 1

1 Temporary monitor 2 QA Collocated monitors 3 Status of this Tribal monitor is not known.



### PM2.5 Monitors in the Valley

The San Joaquin Valley is designated nonattainment for PM2.5. Table 13 shows the minimum number of PM2.5 sites required per MSA. The minimum number of PM2.5 sites required per MSA is shown in Table 13 and the PM2.5 monitoring requirements for the San Joaquin Valley are shown in Table 14. Tables 15a, 15b, and 16 summarize the Valley’s SLAMS and SPM PM2.5 monitoring stations, r espectively.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 24



### Table 13 Minimum PM2.5 Monitoring Requirements

MSA population Most recent 3-year design

value ≥ 85% of any PM2.5
NAAQS (equivalent to an annual design value ≥ 12.8 μg/m3 or a 24-hour design value ≥ 29.8

μg/m3) Most recent 3-year design

value < 85% of any PM2.5
NAAQS (equivalent to an annual design value < 12.8 μg/m3 or a 24-hour design value < 29.8 μg/m3), or no design value

> 1,000,000 3 2

500,000 – 1,000,000 2 1

50,000 - < 500,000 1 0



### Table 14 PM2.5 Monitoring requirements for the Val ley

PM2.5

Metropolitan
Statistical Area (MSA) County 2009 Population 24-hour

2007-

2009 Design

Value in
MSA (μg/m3) 2 Annual

2007-

2009 Design

Value in
MSA (μg/m3) Monitors

required Actual #

of
SLAMS

sites in
MSA Actual

# of
SPM

sites

in
MSA

Bakersfield Kern 827,173 1 70 22.6 2 2 2

Fresno Fresno 942,298 60 17.1 2 3 3

HanfordCorcoran Kings 154,743 53 17.3 1 1 1

Madera Madera 152,331 - - 1 1
Merced Merced 256,450 51 14.5 1 1 1

Modesto Stanislaus 526,383 60 23.2 2 2

Stockton San

Joaquin 689,480 50 12.9 2 2 1

VisaliaPorterville Tulare 441,481 59 18.8 1 1 3

1 The population listed for Bakersfield here reflect s the population for all of Kern County, not just t he Valley portion. Air monitors in the Eastern Kern Air D istrict would count towards the monitors required f or the Bakersfield MSA. However, the “Actual # of monit ors in MSA” listed here includes those in the San J oaquin Valley Air Basin only.

2 These data are preliminary. Air quality data may i nclude data influenced by exceptional events and/or data completeness and substitution requirements.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 25



### Table 15a San Joaquin Valley PM2.5 SLAMS monitor i nformation

MSA/CBSA: Fresno County: Fresno

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

FresnoPacific Neighborhood Population Standards/Strategy Research Support Seasonal

Research Support Timely/Public 1-Hour
Fresno-First Neighborhood High
Concentration Standards/Strategy

Research Support Daily

Clovis-Villa Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Bakersfield County: Kern

Site Name Scale Site Type Monitoring Objective Samplin g Schedule
Research Support Timely/Public 1-Hour Bakersfield-
California Neighborhood Population Standards/Strategy Daily

BakersfieldPlanz Neighborhood Population Standards/Strategy 1:3

MSA/CBSA: Hanford – Corcoran County: Kings

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Standards/Strategy Research Support SeasonalCorcoranPatterson Neighborhood High
Concentration Research Support Timely/Public 1-Hour

MSA/CBSA: Merced County: Merced

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Merced-M
Street Neighborhood Representative

concentration Standards/Strategy

Research Support 1:3San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 26



### San Joaquin Valley PM2.5 SLAMS monitor information

MSA/CBSA: Stockton County: San Joaquin

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Manteca Neighborhood Population Standards/Strategy Research Support 1-Hour

Standards/Strategy Research Support 1:3 / 1-Hour 1 Stockton–

Hazelton Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Modesto County: Stanislaus

Site Name Scale Site Type Monitoring Objective Sampling
Schedule
Standards/Strategy Research Support 1:3 / 1-Hour 1 Modesto–

14 th Street Neighborhood Population Research Support Timely/Public 1-Hour

Turlock Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Visalia – Porterville County: Tulare

Site Name Scale Site Type Monitoring Objective Sampling
Schedule Standards/Strategy Research Support 1:3 Visalia–
Church Neighborhood Population Research Support Timely/Public 1-Hour

1 An FRM was replaced with an FEMSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 27



### Table 15b San Joaquin Valley PM2.5 SPM monitor inf ormation

MSA/CBSA: Fresno County: Fresno

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Huron Neighborhood Population Research Support Timely/Public 1-Hour

Tranquillity Urban Urban Research Support Timely/Public 1-Hour

MSA/CBSA: Bakersfield County: Kern

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Lebec Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Hanford – Corcoran County: Kings

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Hanford-Irwin Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Madera County: Madera

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Madera-City Neighborhood Population Research Support Timely/Public 1-Hour

MSA/CBSA: Merced County: Merced

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

MercedCoffee Neighborhood Population Research Support Timely/Public 1-HourSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 28



### San Joaquin Valley PM2.5 SPM monitor information

MSA/CBSA: Stockton County: San Joaquin

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Tracy-Airport Neighborhood Regional transport Research Support

Timely/Public 1-Hour

MSA/CBSA: Visalia – Porterville County: Tulare

Site Name Scale Site Type Monitoring Objective Sampling
Schedule

Sequoia-Ash

Mountain Regional Regional transport Research Support

Timely/Public 1-Hour

Porterville Neighborhood Population Research Support Timely/Public 1-Hour



### Table 16 San Joaquin Valley PM2.5 monitor types

Instrument Type Monitor Type MSA/CBSA: Fresno County: Fresno FRM FEM Non-FEM SLAMS SPM

Site Name

Clovis-Villa 1 1

1 1 Fresno-First 1 1

Fresno-Pacific 1 1

Huron 1 1 Tranquillity 1 1

Total SLAMS/SPM 3 3

Instrument Type Monitor Type MSA/CBSA: Bakersfield County: Kern FRM FEM Non-FEM SLAMS SPM

Site Name

Bakersfield-Planz 1 1

1 1 Bakersfield-California 1 1

Lebec 1 1

Total SLAMS/SPM 2 1San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 29



### San Joaquin Valley PM2.5 monitor types
Instrument Type Monitor Type MSA/CBSA: Hanford – Corcoran County: Kings FRM FEM Non-FEM SLAMS SPM

Site Name

1 Corcoran-Patterson 1 1

Hanford-Irwin 1 1

Total SLAMS/SPM 1 1

Instrument Type Monitor Type MSA/CBSA: Madera County: Madera FRM FEM Non-FEM SLAMS SPM

Site Name Madera-City 1 1

Total SLAMS/SPM 1

Instrument Type Monitor Type MSA/CBSA: Merced County: Merced FRM FEM Non-FEM SLAMS SPM

Site Name

Merced-Coffee 1 1

Merced-M Street 1 1

Total SLAMS/SPM 1 1

Instrument Type Monitor Type MSA/CBSA: Stockton County: San Joaquin FRM FEM Non-FEM SLAMS SPM

Site Name

Manteca 1 1

Stockton-Hazelton 1 1 1

Tracy-Airport 1 1

Total SLAMS/SPM 2 1

Instrument Type Monitor Type MSA/CBSA: Modesto County: Stanislaus FRM FEM Non-FEM SLAMS SPM

Site Name

Modesto-14 th Street 1 1 1

Turlock 1 1

Total SLAMS/SPM 2San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 30



### San Joaquin Valley PM2.5 monitor types

Instrument Type Monitor Type MSA/CBSA: Visalia – Porterville County: Tulare FRM FEM Non-FEM SLAMS SPM

Site Name

Porterville 2 1 1

Sequoia-Ash Mountain 1 1

1 1 Visalia-Church 1 1

Total SLAMS/SPM 1 3

1 An FRM was replaced with an FEM.

2 Data can be used for Regulatory purposes after the site has been operational for two years.



### PM Collocation Requirements (40 CFR 58 Appendix A, Sections 3.2.5 and 3.2.6)

The District’s Particulate Matter collocation requi rements are met by the “Primary Quality Assurance Organization” (PQAO). ARB is the PQAO for the Valley as well as several other air basins. ARB has requested that th e District to collocate one PM-10 monitor. The Corcoran site serves this purpose. The AIRS codes for the collocated pair are: 06-031-0004-88102-1 (this is the primary monit or) and 06-031-0003-88102-3 (this is the collocated monitor).

Public Review of Changes to the PM2.5 Monitoring Ne twork

Public input is required whenever the District prop oses to move an existing violating PM2.5 monitor (40 CFR 58.10(c)). The District uses the annual Air Monitoring Network Plan to notify and seek public comment on any plann ed changes to the existing PM2.5 network. The public has 30 days to comment on the Monitoring Network Plan and any PM2.5 network changes. The plan is posted on the D istrict website, and public notice is published in a newspaper of general circulation in each affected CBSA. The 2011 Monitoring Network Plan was posted for comment May 23, 2011, through June 21, 2011. No public comments were received.

In the event of unanticipated changes to the PM2.5 network that occur outside the Monitoring Network Plan process, the District will post public notice in Valley newspapers, post a document describing the proposed changes on its website, and seek public comment.

Carbon Monoxide

In the past, monitoring has shown that the Valley’s Carbon monoxide (CO)
concentrations have not exceeded the NAAQS for over a decade. As noted in SectionSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 31 

### 4.2 of Appendix D of 40 CFR Part 58, there are no m inimum requirements of the number of Carbon Monoxide (CO) monitoring sites. T he District continues CO monitoring to supplement related meteorological and criteria pollutant data. Table 17 summarizes the Valley’s past CO monitoring sites.

Table 17 Carbon Monoxide Monitoring Stations in th e San Joaquin Valley

As of June 1, 2011

Site Name Sampling

Frequency Scale Site Type Objective

Clovis–Villa Continuous Neighborhood Population Standards/ Strategy

Fresno–

Drummond Continuous Neighborhood Population Standards/ Strategy

Fresno–First Continuous Neighborhood Population Standards/ Strategy

Fresno–Sky Park Continuous Neighborhood Population Standards/ Strategy

Modesto–14 th

Street Continuous Neighborhood Population Standards/ Strategy

Stockton–

Hazelton Continuous Neighborhood Population Standards/ Strategy

Turlock Continuous Neighborhood Population Standards/ Strategy



### A proposed new CO rule (to issue a final rule on Au gust 12, 2011), is proposing to retain the existing NAAQS for CO (the existing prim ary standards are 9 parts per million (ppm) measured over 8 hours, and 35 ppm measured ov er 1 hour). EPA is proposing to make changes to the ambient air monitoring requi rements for CO, to include monitor placement near highly trafficked roads within urban populations of 1 million or more and to be collocated with Nitrogen dioxide (NO 2 

### ) monitors (as part of the January, 2010
revision to the NAAQS for NO 2 

### ). Moving an existing monitor to a new location is acceptable.

EPA is also proposing that EPA Regional Administrat ors would have the authority to require additional monitoring in case-by-case circu mstances, such as in areas impacted by major stationary CO sources, in urban downtown a reas or urban street canyons, or in areas adversely impacted by meteorological and/o r topographical influences. EPA is proposing that the required CO monitors would be op erating by January 1, 2013.

Nitrogen Dioxide

EPA strengthened the health-based NAAQS for NO 2 

### , setting a new 1-hour NO 2 

### standard at the level of 100 parts per billion (ppb ) effective April 12, 2010. TheSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 32 

### monitoring requirements for this new standard will be based upon population of an area as well as the annual average daily traffic (AADT) count. NO 2 

### monitors that are required under this new standard are to be operatio nal by January 1, 2013. Table 18 summarizes the Valley’s NO 2 

### monitoring stations.

Table 18 NO 2 

### Monitoring Stations in the San Joaquin Valley

As of June 1, 2011

Site Name Sampling

Frequency Scale Site Type Objective

Bakersfield–
California Continuous Neighborhood Population Standards/ Strategy,

Clovis–Villa Continuous Neighborhood High Concentra tion Standards/ Strategy,

Research

Edison Continuous Neighborhood Population Standards/ Strategy

Fresno–

Drummond Continuous Neighborhood High Concentration Standards/ Strategy

Fresno–First Continuous Neighborhood Population Standards/ Strategy

Fresno–Sky

Park Continuous Neighborhood Population Standards/ Strategy

Hanford--Irwin Continuous Neighborhood Population Standards/ Strategy

Madera–Pump

Yard Continuous Neighborhood Population Standards/ Strategy,

Research

Merced–Coffee Continuous Neighborhood Population Standards/ Strategy

Parlier Continuous Neighborhood Population Standards/ Strategy,

Research

Shafter Continuous Neighborhood Population Standards/ Strategy,

Research

Stockton–

Hazelton Continuous Neighborhood Population Standards/ Strategy

Tracy–Airport Continuous Neighborhood Population Standards/ Strategy

Turlock Continuous Neighborhood Population Standards/ Strategy

Visalia--Church Continuous Neighborhood Population Standards/ StrategySan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 33 

### As noted in Section 4.3 of Appendix D of 40 CFR Par t 58, one microscale near-road
NO 2 

### monitoring station is required in each CBSA with a population of 500,000 or more.

Installation of four sites within the District is d ependent upon securing funding from EPA. Existing Clean Air Act Section 105 funding is already fully allocated to operate the existing air monitoring network. Provided funding is secured, the District and CARB will collaborate in locating suitable sites for the four stations. One station will be installed in each of the following counties: San Joaquin, Stani slaus, Fresno, and the valley portion of Kern County. Near-road NO 2 

### monitoring stations shall be sited near major road s with high AADT counts where maximum hourly NO 2 

### concentrations are expected to

occur.

Although the Valley does not exceed federal or stat e standards for NO 2 

### , NOx reductions contribute to air quality improvement for both ozon e and PM. A schedule to install equipment for measuring NO/NOy at the Arvin-Di Gior gio and Parlier monitoring sites is currently being determined.

Sulfur Dioxide

For the years of 2010 through 2012 Section 4.4 of A ppendix D of 40 CFR Part 58 does not specify any minimum requirements for the number of SO 2 

### monitoring sites. Because the Valley does not exceed the federal stan dard for SO 2, 

### there is just one SO 2 

### monitoring site in the Valley (shown in Table 19a). This monitor is operated by CARB and is part of the NCore Network.

Table 19a SO 2 Monitoring Station in the San Joaquin Valley

As of June 1, 2010

Site Name Sampling

Frequency Scale Site Type Objective

Fresno-First Continuous Neighborhood Population Standards/ Strategy



### EPA revised the SO 2 

### NAAQS and monitoring requirements in the Federal Re gister on June 22, 2010 (CFR, 40 CFR Part 58, Section 4.4). The rule became effective on August 23, 2010). The number of monitor requiremen ts is based upon CBSA’s most recently available census data multiplied with the total amount of SO 2 

### in tons per year emitted from the most recently available data from the National Emissions Inventory for each county, divided by one million, providing a Po pulations Weighted Emissions Index (PWEI) value in units of million persons-tons per y ear (Table 19b).San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 34 

### Table 19b Populations Weighted Emissions Index for the San Joaquin Valley

As of June 1, 2011

County (CBSA) Total County Population 1 SO 2 Tons per

Year 2 PWEI

Fresno 942,298 458 432

Kern 827,173 2212 1,830

Kings 154,743 55 9

Madera 152,331 113 17

Merced 256,450 66 17

San Joaquin 689,480 1097 756

Stanislaus 526,383 312 164

Tulare 441,481 122 54

1 Total County Population includes the entire county . Population data was from the most recently availa ble data from the CA Department of Finance E-4 Population Esti mates from Cites, Counties and the State, 2001-2009 , with 2000

Benchmark. Estimates are for 1/1/2009.

2 SO 2 Tons per Year includes the entire county. SO 2 data is from the most recent data available from t he 2008 National Emissions Inventory for each county.



### As per 40 CFR Part 58, Section 4.4, Appendix D any CBSA with a calculated value equal to or greater than 5,000, but less than 100,0 00, a minimum of one SO 2 

### monitor is required within that CBSA. There are no minimum re quirements for the number of SO 2 

### monitoring sites in the District because the Valley does not exceed the federal standard
for SO 2



### .

Lead

EPA revised the lead NAAQS and monitoring requireme nts in the Federal Register on November 12, 2008 (73 FR 66964 – 67062, codified in 40 CFR 58.10). The rule became effective on January 26, 2011 and requires m onitoring agencies to install nonsource oriented lead monitors at NCore sites by Dec ember 27, 2011, in CBSAs that exceed a population of 500,000. The only site meet ing these criteria within the District

is Fresno-1 st 

### which is operated by the California Air Resources Board. The EPA is also requiring source-oriented lead monitoring at areas with a threshold of 1.0 ton per year (tpy). The District has not identified any sources at the 1.0 tpy threshold, thus sourceoriented monitoring is not required.

Toxics

Airborne toxic substances are monitored by the CARB at Bakersfield–California, Fresno--First, and Stockton–Hazelton. Periodic, 24 -hour samples are analyzed for the following gases: benzene, Carbon tetrachloride, chl oroform, ethylene dibromide, ethylene dichloride, methyl chloroform, methylene c hloride, perchloroethylene, toluene,San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 35 

### trichloroethylene, and m-, p-, and o-xylene. The s amples are also analyzed for the following particulate metals: arsenic and chromium- 6. CARB’s Integrated NMOC sampling program and the District’s PAMS NMOC sampl ing program also identify and quantify several toxic hydrocarbon species.

Green House Gases

For the year 2010 CARB installed Picarro multi-gas analyzers (CO2, CH4, and water vapor) and a Teledyne-API 300 EU (CO) analyzer at t he Madera-Pump Yard, Tranquillity, and Arvin sites. While the data will not be submitted to AQS at this time, the data will be used by CARB’s Research Division. CAR B plans to continue monitoring Green House Gases (GHG) at these sites in 2011.

NCore

EPA’s October 2006 ambient air monitoring amendmen ts established a requirement for National Core (NCore) multi-pollutant monitoring st ations. An NCore plan was to be submitted to EPA, and NCore stations must be operat ional by January 1, 2011. EPA selected the Fresno-First Street air monitoring sta tion (operated by ARB) as an NCore

site.

ARB submitted an NCore plan to EPA in November 2009 . Fresno--First already met NCore requirements for filter-based and continuous PM2.5, speciated PM2.5, ozone, and meteorology. ARB staff installed trace level C O, trace level SO 2 

### , trace level NOy,
and continuous PM-Coarse monitors at this site in D ecember 2010. ARB staff also installed a gas dilution calibrator, a zero air gen erator, and digital data loggers to support NCore monitoring. In December 2011, ARB st aff will install a TSP-lead sampler, completing all the pollutant monitoring re quirements for the NCore program. All the newly installed instrumentation will be rep orting data to EPA’s AQS databases by the end of May 2011."

Meteorology

Data for a variety of meteorological variables are collected to aid various programs affected by weather. Such programs include forecas ting air quality, exceptional events, long-term planning, and pollutant trend assessment. These activities help protect public health and have made the public and media more awar e of air quality and what can be done to reduce air pollution. See Table 20 for the meteorological parameters measured in the Valley.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 36 

### Table 20 Meteorological Parameter Monitoring Stati ons in the San Joaquin Valley

As of June 1, 2011

Site Wind

Speed Wind

Direction Outdoor

Temperature Relative

Humidity Barometric

Pressure Solar

Radiation

Arvin–Di Giorgio X

Bakersfield–California X X X X X X

Clovis–Villa X X X X X X

Corcoran–Patterson X X X X

Edison X X X

Fresno–Drummond X X X X

Fresno–First X X X X X

Fresno--Sky Park X X X

Hanford--Irwin X X X X

Huron X

Lebec X X X X

Madera–City X X X X X X

Madera–Pump Yard X X X X X X

Manteca X X X X

Maricopa X X X X

Merced–Coffee X X X

Modesto–14 th Street X X X X

Oildale X X X

Parlier X X X X X X

Porterville X X X X

Santa Rosa Rancheria Unknown

Sequoia–Ash Mountain X X X X X

Sequoia–Lower

Kaweah X X X X X

Shafter X X X X X X

Stockton–Hazelton X X X X

Tracy–Airport X X X X

Tranquillity X X X X

Turlock X X X X

Visalia–Church X X X X

Visalia--Airport X X X X X XSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 37 

### Summary of completed changes, January 2010 – July 2 011

• The Arvin-Bear Mountain Blvd site operated by CARB had to be relocated due to an expired lease in 2010 so the Arvin-Di Giorgio monit oring site is intended to be the long-term replacement for the Arvin-Bear Mountain B lvd site. The Arvin-Di Giorgio site became operational in May 2010 and is operated by CARB. Parallel ozone monitoring was completed in November 2010 and the A rvin-Bear Mountain Blvd. site

was then closed.

The Arvin-Di Giorgio site is located 18 miles south east of the Bakersfield, CA metropolitan area and is approximately 2 miles away from the old site. The purpose

of the site is to monitor maximum ozone concentrati ons and transport from upwind urban areas. This site will also be a PAMS Type 3 site. The site also monitors NO 2 

### , NMOC, NMHC, and meteorology and CARB plans to insta ll methane/CO2 and trace CO analyzers for special purpose monitoring. In ad dition, a NOy monitor will be added to the Arvin-Di Giorgio air monitoring site t o comply with the latest regulation for PAMS Type 3 sites.

• CARB installed Picarro multi-gas analyzers (CO2, C H4, and water vapor) and a Teledyne-API 300 EU (CO) analyzer at the Madera-Pum p Yard, Tranquillity, and Arvin Di-Giorgio sites as part of its GHG monitorin g program. While the data will not be submitted to AQS at this time, the data will be used by CARB’s Research

Division.

• A system-wide change that was made in 2010 was the addition of ammonia denuders to all of the NOx analyzers at all of the District sites than measure NOx.

• Anderson sampling instruments at the Fresno-Pacifi c, Merced-M Street, and Corcoran monitoring sites have been replaced with P artisol Units.

• Three new monitoring stations were installed and b ecame operational in the District in 2010. The Manteca site monitors PM2.5, PM10, an d meteorology, the MaderaCity site monitors ozone, PM2.5, PM10, and meteorol ogy, and the Porterville site monitors ozone, PM2.5, and meteorology.

• The Hanford monitoring station has been operationa l for many years and over time had become dilapidated and in need of repairs. The site underwent reconstruction in 2009 and was finished and resumed operations in February 2010.

Summary of planned changes, July 2011 – December 20 11

The Valley air monitoring network is continually be ing improved. As one overall change, the District will be replacing filter-based PM moni tors with continuous, real-time PM2.5 and real-time PM10 monitors in the future, particul arly in rural areas. These monitorsSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 38 

### are more economically efficient than filter-based m onitors and give the District more data for forecasting. Simultaneously, the District will be investigating to see how realtime data compares to filter-based data at sites wi th parallel monitoring.

The planned site-specific changes are described bel ow.

Once funding is secured from EPA, the District and CARB will begin the process of finding locations for four microscale near-road NO 2 

### monitoring stations that will be

installed within the District’s boundaries to meet the requirement listed in Section 4.3 of Appendix D of 40 CFR Part 58. One station will be installed in each of the following counties: San Joaquin, Stanislaus, Fresno, and the Valley portion of Kern County.

Stockton CBSA/MSA

A PM10 TEOM Special Purpose Monitor (SPM) has been installed at the Manteca site to compare with PM10 measurements from the Stockton Wagner/Holt PM10 monitor. If the results show that the measurement prove similar enough, the Wagner/Holt monitor will be shut down and a permanent PM10 monitor (TEO M) will be installed at Manteca.

Modesto CBSA/MSA

The District does not have any changes scheduled fo r this MSA during this time.

Merced CBSA/MSA

The District does not have any changes scheduled fo r this MSA during this time. The District’s long-term plan is to investigate consoli dating the Merced-Coffee and MercedM Street sites. No changes are planned at this tim e.

Madera CBSA/MSA

The District does not have any changes scheduled fo r this MSA during this time.

Fresno CBSA/MSA

Recently planted vegetation on adjacent property ma y require the District to relocate the Fresno-Sky Park site sometime over the next few yea rs. There are no definite relocation plans at this time.

In addition, a NOy monitor will be added to the Par lier air monitoring site to comply with the latest regulation for PAMS Type 3 sites.

Hanford-Corcoran CBSA/MSA

The District does not have any changes scheduled fo r this MSA during this time.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 39 

### Visalia-Porterville CBSA/MSA

The District does not have any changes scheduled fo r this MSA during this time.

Bakersfield CBSA/MSA

In December 2009, the Bakersfield-Golden site was s hut down for relocation due to adjacent highway expansion. The replacement site, Bakersfield-Muni, will be located at the Bakersfield Municipal Airport in the Bakersfiel d, CA and will be about 790 meters (0.5 miles) away from CARB’s Bakersfield-Planz site . This location was chosen because the airport’s runway, most of the airport a ctivities, and the dirt fields in the area are an ample distance away, and a sufficient power source is nearby. The District plans to have the Bakersfield-Muni site operational in Oc tober 2011 and will be operated by
the SJVAPCD. This site will measure maximum ozone precursor emissions and will serve as a PAMS Type 2 site. The District plans to install analyzers for ozone, PM10 TEOM, PM2.5 BAM (non-regulatory), CO, NO 2 

### , NMOC (PAMS), NMHC. Instruments for monitoring meteorology will also be installed. Once this Bakersfield-Muni site is operational, it is anticipated that the Bakersfield -Planz monitoring station will be

relocated to the Bakersfield-Muni site and the Bake rsfield-Planz site will be closed.

After the shutdown of the Bakersfield-Golden site, the District requested CARB’s permission to temporarily operate a real time PM10 monitor at the Bakersfield-California site (06-029-0014). The sampler (a BAM PM10 FEM) be gan to operate in March, and its real-time data will contribute to the District’s pr oduction of more accurate daily AQI forecasting. When the relocation of the new site i s completed, this BAM monitor will be

removed and the new site will continue PM10 monitor ing with the established TEOM sampler.

The Arvin-Di Giorgio site will to monitor maximum o zone concentrations and transport from upwind urban areas, and serve as a PAMS Type 3 site (SLAMS). An NOy monitor will be added to the Arvin-Di Giorgio air monitorin g site to comply with the latest regulation for PAMS Type 3 sites. Plans to construc t a building at the Arvin-DiGiorgio site for monitoring NO 2 

### are being determined. CARB also plans to install methane/CO 2 

### and trace CO analyzers for special purpose monitori ng.

Construction of shelters and installation of PAMS e quipment for the Bakersfield-Muni and Arvin-Di Giorgio sites are planned but will not be completed in time for the 2011 PAMS season so these PAMS sites will be down during that time.

Data Submission Requirements

Precision data are submitted to AQS on an ongoing b asis each quarter as the data is uploaded into AQS. The accuracy data is submitted into AQS by CARB based on their

scheduled audits. The District submitted its 2010 data certification to the EPA. Annual certifications are due by May 1 of each year.San Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 40



### Acronyms, Abbreviations, and Initialisms

AIRS: Aerometric Information Retrieval System; rep laced with AQS AQI: Air Quality Index AQS: Air Quality System
CARB: California Air Resources Board ARM: approved regional method

BAM: beta attenuation monitor
CAA: Clean Air Act
CBSA: Core-based statistical area CCOS: Central California Ozone Study CFR: Code of Federal Regulations CRPAQS: California Regional Particulate Air Qualit y Study
CO: Carbon Monoxide
CO 2 : Carbon Dioxide
CSA: Combined statistical area District: San Joaquin Valley Air Pollution Control District

EBAM: environmental beta attenuation monitor EPA: U.S. Environmental Protection Agency FEM: Federal Equivalent Method FIPS: Federal information processing standard FR: Federal Register

FRM: Federal Reference Method GHG: green house gases MSA: Metropolitan statistical area NAAQS: National Ambient Air Quality Standard
NCore: National Core NMHC: Non-methane hydrocarbons NMOC: non-methane organic carbons


### NO 2 : Nitrogen Dioxide NOAA: National Oceanic and Atmospheric Administrati on NOx: oxides of nitrogen
NO y : reactive nitrogen
NPS: National Park Service
O 3 : ozone PAMS: Photochemical Assessment Monitoring Station

Pb: lead PM: particulate matter PM2.5: particulate matter 2.5 microns or less in d iameter PM10: particulate matter 10 microns or less in dia meter SLAMS: State and Local Air Monitoring Station SJV: San Joaquin Valley SJVAPCD: San Joaquin Valley Air Pollution Control District SMS: Smoke Management System

SO 2 : Sulfur Dioxide SPM: Special Purpose Monitor STN: Speciated Trends Network TEOM: Tapered Element Oscillating Microbalance TSP: total suspended particles Valley: San Joaquin Valley VOC: Volatile Organic CompoundsSan Joaquin Valley Unified Air Pollution Control Di strict

2011 Air Monitoring Network Plan 41 

### This page intentionally blank.San Joaquin Valley Air Pollution Control District June 30, 2011

Appendix A: Air Monitoring Site Descriptions 2011 Air Monitoring Network Plan A

- 1 

## Appendix A: Monitoring Site Descriptions

Sites operated by the SJVAPCD

Bakersfield-Muni
The Bakersfield-Golden site was shut down for reloc ation in December 2009. The replacement site, Bakersfield-Muni, will be located in the Bakersfield, CA metropolitan area. The Bakersfield-Muni site will begin operati ng in October 2011 and will be operated by the SJVAPCD. This site will serve as a PAMS Type 2 site, sited to measure maximum ozone precursor emissions and will monitor ozone, PM10 TEOM, PM2.5 BAM (non-regulatory), CO, NO 2 

### , NMOC (PAMS), NMHC, and meteorology. Bakersfield, CA is located at the southern end of t he San Joaquin Valley with mountains to the east, west, and south. Because the mountain s block or slow down air flow, pollutants can get trapped and build up in the area . Pollutants occur locally and also get transported from upwind locations into the area by the wind. During the summer months, high temperatures and longer daylight hours contribute to increases in ozone during the day. In contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants, which scavenge the ozone. During the winter months, ozone concentrations decrease due to shorter daylight hours and lower temperatures. Elevated PM2.5 concentrations are po ssible year round, but concentrations tend to be highest during the winter months due to moisture content in the air, wood burning activities, other anthropogen ic activities, and atmospheric chemistry. PM2.5 concentrations can also increase during wind blown dust events, when the wind can cause PM2.5 to become suspended i n the air. On rare occasions, this region of the San Joaquin Valley experiences w ind events that can carry dust into the area or lift local dust particles into the air. Such events can cause PM10

concentrations to increase and sometimes exceed the NAAQS.

Clovis-Villa Clovis, CA is located in the central part of the Sa n Joaquin Valley with mountains to the

east and northeast. North-south air flow is virtua lly unobstructed. Pollutant emissions occur locally and are also transported from upwind and nearby locations into the area by the wind. The Clovis-Villa monitoring site is operated by SJVAPCD and is located in the northeastern portion of the Fresno, CA metropol itan area. It began operating in September 1990. This site is a PAMS Type 2 site, a site intended to measure maximum ozone precursor emissions. In addition to ozone (SLAMS), the site also monitors PM2.5 (BAM FEM/SLAMS), PM10 (FRM, SLAMS), CO, NO 2 

### , NMOC, NMHC, and meteorology. During the summer months, high te mperatures and longer daylight hours contribute to increases in ozone during the d ay. In contrast, ozone concentrations decrease at night with the absence o f sunlight and the presence of NOx pollutants, which scavenge the ozone. During the w inter months, ozone concentrations tend to be lower due to shorter daylight hours and lower temperatures. Elevated PM2.5 concentrations are possible year round, but concent rations tend to be highest during the winter months due to moisture content in the air, w ood burning activities, other anthropogenic activities, and atmospheric chemistry . PM2.5 concentrations can alsoSan Joaquin Valley Air Pollution Control District June 30, 2011

Appendix A: Air Monitoring Site Descriptions 2011 Air Monitoring Network Plan A

- 2 

### increase during wind events because the wind can ca use PM2.5 to become suspended in the air. On rare occasions, this area of the Sa n Joaquin Valley experiences wind events that can carry dust into the area or lift lo cal dust particles into the air. Such

events can cause PM10 concentrations to increase.

Corcoran-Patterson Corcoran, CA is located in the central part of the San Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutant emissions occur locally and also get transported from upwind locations into the area by the wind. The Corcoran-Patterson monitoring site is operated by SJVAPCD and is located 67 miles south of the Fresno, CA metropolitan area. I t began operating in October 1996. The purpose of the site is to monitor representativ e concentrations of PM10 (TEOM and FRM, both SLAMS) and PM2.5 (FRM, SLAMS and a BAM SP M) and responses from surrounding areas. This site also monitors meteoro logy. Elevated PM2.5 concentrations are possible year round, but concent rations tend to be highest during the winter months due to moisture content in the air, w ood burning activities, other anthropogenic activities, and atmospheric chemistry . PM2.5 concentrations can also increase during wind events because the wind can ca use PM2.5 to become suspended in the air. On rare occasions, this area of the Sa n Joaquin Valley experiences wind events that can carry dust into the area or lift lo cal dust particles into the air. Such

events can cause PM10 concentrations to increase.

Fresno-Drummond Fresno, CA is located in the central part of the Sa n Joaquin Valley with mountains to the east and west. North-south air flow is virtually u nobstructed. Pollutants occur locally and also get transported from upwind locations into the area by the wind. The FresnoDrummond monitoring site is operated by SJVAPCD and is located in the Fresno, CA metropolitan area. It began operating in July 1984 . The purpose of the site is to monitor representative concentrations of hourly ozo ne responses in an urban area. In addition to ozone (SLAMS), the site also monitors P M10 (FRM, SLAMS), CO, NO 2 

### , and meteorology. During the summer months, high temper atures and longer daylight hours contribute to increases in ozone during the day. I n contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which scavenge the ozone. During the winter months , ozone concentrations tend to be lower due to shorter daylight hours and lower tempe ratures.

Fresno-Pacific Fresno, CA is located in the central part of the Sa n Joaquin Valley with mountains to the east and west. North-south air flow is virtually u nobstructed. Pollutants occur locally and also get transported from upwind locations into the area by the wind. The FresnoPacific monitoring site is operated by SJVAPCD and is located in the Fresno, CA metropolitan area. It began operating in January 2 000. The purpose of the site is to monitor representative PM2.5 (FRM, SLAMS) concentra tions in an urban area. Elevated PM2.5 concentrations are possible year rou nd, but concentrations tend to be highest during the winter months due to moisture co ntent in the air, wood burningSan Joaquin Valley Air Pollution Control District June 30, 2011

Appendix A: Air Monitoring Site Descriptions 2011 Air Monitoring Network Plan A

- 3 

### activities, other anthropogenic activities, and atm ospheric chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air. On rare occa sions, this area of the San Joaquin Valley experiences wind events that can car ry dust into the area or lift local dust particles into the air. Such events can cause PM10 concentrations to increase.

Fresno-Sky Park Fresno, CA is located in the central part of the Sa n Joaquin Valley with mountains to the east and west. Pollutants occur locally and also g et transported from upwind locations into the area by the wind. The Fresno-Sky Park mo nitoring site is operated by SJVAPCD and is located in the Fresno, CA metropolit an area. It began operating in July 1986. The purpose of the site is to monitor r epresentative concentrations of hourly ozone responses in an urban area. In addition to o zone (SLAMS), the site also monitors CO, NO 2 

### , and meteorology. During the summer months, high temperatures and longer daylight hours contribute to increases i n ozone during the day. In contrast, ozone concentrations decrease at night with the abs ence of sunlight and the presence of NOx pollutants which scavenge the ozone. During the winter months, ozone concentrations tend to be lower due to shorter dayl ight hours and lower temperatures. .

Hanford-Irwin Hanford, CA is located in the central part of the S an Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally and also get transported from upwind locati ons into the area by the wind. The Hanford-Irwin monitoring site is operated by SJVAPC D and is located 51 miles south of the Fresno, CA metropolitan area. The site began o perating in October 1993 and was decommissioned in October 2007 due to plans to move it to a different part of the Irwin location. The purpose of the site is to monitor re presentative concentrations of hourly ozone, PM2.5, and PM10 (FRM and TEOM, both SLAMS) r esponses from upwind and nearby urban areas. The PM2.5, PM10, and ozone mon itors were temporarily moved to Corcoran during site reconstruction. In February 2 010, the ozone (SLAMS) and PM2.5 (BAM, SLAMS) monitors were returned to Hanford and the site became operational again. The PM10 monitor was returned and became ope rational in July 2010. During the summer months, high temperatures and longer day light hours contribute to increases in ozone during the day. In contrast, oz one concentrations decrease at night with the absence of sunlight and the presence of NO x pollutants which scavenge the ozone. During the winter months, ozone concentrati ons tend to be lower due to shorter daylight hours and lower temperatures. Elevated PM2 .5 concentrations are possible year round, but concentrations tend to be highest d uring the winter months due to moisture content in the air, wood burning activitie s, other anthropogenic activities, and atmospheric chemistry. PM2.5 concentrations can al so increase during wind events because the wind can cause PM2.5 to become suspende d in the air. On rare occasions, this area of the San Joaquin Valley expe riences wind events that can carry dust into the area or lift local dust particles int o the air. Such events can cause PM10

concentrations to increase.San Joaquin Valley Air Pollution Control District June 30, 2011

Appendix A: Air Monitoring Site Descriptions 2011 Air Monitoring Network Plan A

- 4 

### Huron Huron, CA is located in southwestern Fresno County, and is about 40 miles southwest of Fresno, CA, with the coastal mountain range just to the west. North-south air flow is virtually unobstructed. This monitoring site was e stablished in January 2007 in order to comply with Assembly Bill (AB) 841. Currently, thi s site only measures PM2.5 (SPM), as required by AB 841.

Lebec Lebec, CA is located in the southern-most portion o f the San Joaquin Valley. The Lebec monitoring station was initiated by the Tejon Ranch in 2004, and the District assumed responsibility for this site as of January 2009. This site allows the District to better understand pollution impacts in the southern San Emigdio Mountains. The site measures meteorological parameters and PM2.5 (SPM). This site will be used for general residential wood burning declarations for t he Greater Frazier Park Area in the future. The site is not yet reported on AQS.

Madera-City Madera, CA is located in the northern part of the S an Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. The Madera-City monitoring site is located closer to the city cente r of Madera than the Madera-Pump Yard site. The Madera-City site is operated by the SJVAPCD and became operational in June 2010. The site monitors ozone (SLAMS), PM2 .5 (BAM FEM, SLAMS), PM10 (TEOM, SLAMS), and meteorology. The purpose of thi s site is to measure down wind concentrations of the city of Madera which will pro vide needed information about the variability of air quality levels on the Valley flo or of Madera County.

Madera-Pump Yard Madera, CA is located in the northern part of the S an Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations. The Madera-Pump Yard Street monitoring site is operated by SJVAPCD and is located in the Madera, CA. It began operating in August 1997. This site was established as a PAMS Type 1 site, located in an area upwind of Fres no and not to be influenced by upwind or local ozone precursor emissions. In addi tion to ozone (SLAMS), this site also monitors CO, NMOC, NMHC, and meteorology. During t he summer months, high temperatures and longer daylight hours contribute t o increases in ozone during the day. In contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which scavenge the ozone . During the winter months,

ozone concentrations tend to be lower due to shorte r daylight hours and lower temperatures.

Manteca Manteca, CA is located in the northern part of the San Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations orSan Joaquin Valley Air Pollution Control District June 30, 2011

Appendix A: Air Monitoring Site Descriptions 2011 Air Monitoring Network Plan A

- 5 

### through the Sacramento Delta from the Bay Area. Th e Manteca monitoring site is operated by SJVAPCD is located in Manteca, CA opera ted by SJVAPCD. It became operational in November 2010. The purpose of the s ite is to monitor transport of and representative concentrations of PM2.5 (BAM/FEM, SL AMS), and PM10 (TEOM, SLAMS) from upwind and nearby urban areas. The sit e also monitors meteorology. During the winter months, ozone concentrations tend to be lower due to shorter daylight hours and lower temperatures. Elevated PM2.5 conce ntrations are possible year round, but concentrations tend to be highest during the wi nter months due to moisture content in the air, wood burning activities, other anthropo genic activities, and atmospheric chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air . Occasionally, wind will carry dust across the city and cause PM10 concentrations to increase, but PM10 and PM2.5

exceedances due to wind events are rare.

Maricopa Maricopa, CA is located at the southern end of the San Joaquin Valley with mountains to the east, west, and south. Because the mountains block or slow down air flow pollutants can get trapped and build up in the area . The Maricopa monitoring site is operated by the SJVAPCD and is located 45 miles sou thwest of the Bakersfield, CA metropolitan area. It began operating in July 1987 . The purpose of the site is to monitor representative concentrations of hourly ozo ne (SLAMS) in a rural area. The site also monitors meteorology. During the summer months, high temperatures and longer daylight hours contribute to increases in oz one during the day. In contrast, ozone concentrations decrease at night with the abs ence of sunlight and the presence of NOx pollutants which scavenge the ozone. During the winter months, ozone concentrations tend to be lower due to shorter dayl ight hours and lower temperatures.

Merced-Coffee Merced, CA is located in the northern part of the S an Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations. The Merced-Coffee monitoring site is operated by SJVAPC D and is located in the Merced, CA. It began operating in October 1991. The purpo se of the site is to monitor representative concentrations of hourly ozone (SLAM S) responses from upwind urban areas. The site also monitors PM2.5 (SPM), NO 2 

### , and meteorology. During the summer months, high temperatures and longer dayligh t hours contribute to increases in ozone during the day. In contrast, ozone concentra tions decrease at night with the absence of sunlight and the presence of NOx polluta nts which scavenge the ozone. During the winter months, ozone concentrations tend to be lower due to shorter daylight hours and lower temperatures.

Merced-M Street Merced, CA is located in the northern part of the S an Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations. TheSan Joaquin Valley Air Pollution Control District June 30, 2011

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### Merced-M Street monitoring site is operated by SJVA PCD and is located in the Merced, CA. It began operating in April 1999. The purpose of the site is to monitor representative concentrations of PM2.5 (FRM, SLAMS) and PM10 (FRM, SLAMS) responses from upwind urban areas. Elevated PM2.5 concentrations are possible year round, but concentrations tend to be highest during the winter months due to moisture content in the air, wood burning activities, other anthropogenic activities, and atmospheric chemistry. PM2.5 concentrations can al so increase during wind events because the wind can cause PM2.5 to become suspende d in the air. Occasionally, wind will carry dust across the city and cause PM10 concentrations to increase, but

PM10 exceedances are rare.

Parlier Parlier, CA is located in the central part of the S an Joaquin Valley with mountains to the east and west. North-south air flow is virtually u nobstructed. Pollutants occur locally and also get transported from upwind locations into the area by the wind. The Parlier monitoring site is operated by SJVAPCD and is locat ed 20 miles southeast of the Fresno, CA metropolitan area. It began operating i n March 1983. The purpose of the site, as a PAMS Type 3 site, is to monitor maximum ozone concentrations (SLAMS) and ozone responses from upwind urban areas. The site also monitors NO 2 

### , NMOC, NMHC, and meteorology. During the summer months, h igh temperatures and longer daylight hours contribute to increases in ozone dur ing the day. In contrast, ozone concentrations decrease at night with the absence o f sunlight and the presence of NOx pollutants which scavenge the ozone. During the wi nter months, ozone concentrations tend to be lower due to shorter daylight hours and lower temperatures.

Porterville Porterville, CA is located in the southern part of the San Joaquin Valley near the
foothills of the Sierra Nevada Mountains to the eas t. It is approximately 25 miles southeast of Visalia, CA, and so transport of pollu tants from Visalia towards Porterville is possible. The site monitors ozone (SLAMS), PM2. 5 (BAM, SPM), and meteorology. The purpose of this site is to represent air qualit y levels present near the foothills of the southern Valley and give the district an indication of exposure of pollutants to the local population.

Stockton-Wagner/Holt Stockton, CA is located in the northern part of the San Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations or through the Sacramento Delta from the Bay Area. Th e Stockton-Wagner/Holt monitoring site is operated by SJVAPCD and is locat ed in the Stockton, CA metropolitan area. It began operating in October 1 996. The purpose of the site is to monitor representative concentrations of PM10 (FRM, SLAMS) in an urban area. Occasionally, wind will carry dust across the city and cause PM10 concentrations to increase, but PM10 exceedances are rare.San Joaquin Valley Air Pollution Control District June 30, 2011

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### Tracy-Airport Tracy, CA is located in the northern part of the Sa n Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations or through the Sacramento Delta from the Bay Area. Th e Tracy-Airport monitoring site is operated by SJVAPCD and is located in Tracy, CA. I t began operating in January 2005. The purpose of the site is to monitor transport of ozone (SLAMS), PM2.5 (BAM, SPM), and PM10 (TEOM, SLAMS) from upwind and nearby urban areas. The site also
monitors NO 2 

### and meteorology. During the summer months, high t emperatures and longer daylight hours contribute to increases in oz one during the day. In contrast, ozone concentrations decrease at night with the abs ence of sunlight and the presence of NOx pollutants which scavenge the ozone. During the winter months, ozone concentrations tend to be lower due to shorter dayl ight hours and lower temperatures. Elevated PM2.5 concentrations are possible year rou nd, but concentrations tend to be highest during the winter months due to moisture co ntent in the air, wood burning activities, other anthropogenic activities, and atm ospheric chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air. Occasionally , wind will carry dust across the city and cause PM10 concentrations to increase, but PM10 exceedances are rare.

Tranquillity Tranquillity, CA is located in western Fresno Count y, and is about 25 miles west of Fresno, CA, with the coastal mountain range just to the west. North-south air flow is virtually unobstructed. This monitoring site was e stablished in November 2009 for research purposes, in an effort to better understan d the Valley’s background and rural pollutant concentrations. This site measures ozone (SPM), PM2.5 (BAM, SPM) and meteorological parameters.

Turlock Turlock, CA is located in the northern part of the San Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations or through the Sacramento Delta from the Bay Area. Th e Turlock monitoring site is operated by SJVAPCD and is located in the Turlock, CA. It began operating in April 1992. The purpose of the site is to monitor repres entative concentrations of hourly ozone (SLAMS), PM2.5 (BAM FEM, SLAMS), and PM10 (FR M, SLAMS) responses from upwind urban areas. The site also monitors CO , NO 2 

### , and meteorology. During the summer months, high temperatures and longer day light hours contribute to increases in ozone during the day. In contrast, oz one concentrations decrease at night with the absence of sunlight and the presence of NO x pollutants which scavenge the ozone. During the winter months, ozone concentrati ons tend to be lower due to shorter daylight hours and lower temperatures. Elevated PM 2.5 concentrations are possible year round, but concentrations tend to be highest d uring the winter months due to moisture content in the air, wood burning activitie s, other anthropogenic activities, and atmospheric chemistry. PM2.5 concentrations can also increase during wind eventsSan Joaquin Valley Air Pollution Control District June 30, 2011

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### because the wind can cause PM2.5 to become suspende d in the air. Occasionally, wind will carry dust across the city and cause PM10 concentrations to increase, but

PM10 exceedances are rare.

Visalia-Airport Visalia, CA is located where the central and southe rn parts of the San Joaquin Valley meet. The Sierra Nevada mountain range is approxim ately 20 miles east of Visalia. North-south air flow is virtually unobstructed. Th e Visalia-Airport monitoring site is operated by SJVAPCD and serves as a wind profiler m onitoring surface wind speed and wind direction. It also monitors air temperature, and relative humidity at the surface. It began reporting official meteorological data in Jan uary 2001. Meteorological parameters have a direct influence on how and where pollutants are transported and how much pollutant concentrations increase or decre ase.

Sites Operated by the CARB

Arvin-Di Giorgio Arvin, CA is located at the southern end of the San Joaquin Valley with mountains to the east, west, and south. Because the mountains block or slow down air flow pollutants can get trapped and build up in the area. Pollutan ts occur locally and also get transported from upwind locations into the area by the wind. The Arvin-Di Giorgio site is located 18 miles southeast of the Bakersfield, CA m etropolitan area. The purpose of the site, as a PAMS Type 3 site (SLAMS), is to moni tor maximum ozone concentrations and transport from upwind urban areas. The site al so monitors NO 2 

### , NMOC, NMHC, and meteorology and CARB plans to install methane/C O 2 

### and trace CO analyzers for special purpose monitoring. In addition, a NOy mon itor will be added to the Arvin-Di Giorgio air monitoring site to comply with the late st regulation for PAMS Type 3 sites. During the summer months, high temperatures and lon ger daylight hours contribute to increases in ozone during the day. In contrast, oz one concentrations decrease at night with the absence of sunlight and the presence of NO x pollutants which scavenge the ozone. During the winter months, ozone concentrati ons decrease due to shorter daylight hours and lower temperatures. Pollutants occur locally and also get transported into the area by wind.

Bakersfield-Planz Bakersfield, CA is located at the southern end of t he San Joaquin Valley with mountains to the east, west, and south. Because the mountains block or slow down air flow pollutants can get trapped and build up in the area . Pollutants occur locally and also get transported from upwind locations into the area by the wind. The Bakersfield-Planz monitoring site is operated by CARB and is located 6 miles north of the Bakersfield, CA metropolitan area. It began operating in September 2000. The purpose of the site is to monitor representative concentrations of PM2.5 (FRM , SLAMS) from upwind and nearby urban areas. Elevated PM2.5 concentrations are possible year round, but concentrations tend to be highest during the winter months due to moisture content in the air, wood burning activities, other anthropogen ic activities, and atmosphericSan Joaquin Valley Air Pollution Control District June 30, 2011

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### chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air

.

Bakersfield-California Bakersfield, CA is located at the southern end of t he San Joaquin Valley with mountains to the east, west, and south. Because the mountains block or slow down air flow pollutants can get trapped and build up in the area . Pollutants occur locally and also get transported from upwind locations into the area by the wind. The Bakersfield-California monitoring site is operated by CARB and is located in the Bakersfield, CA metropolitan area. It began operating in March 1994. The purpo se of the site is to monitor representative concentrations of hourly and daily o zone (SLAMS), PM10 (FRM and BAM FEM, both SLAMS), and PM2.5 (FRM and BAM FEM, b other SLAMS) responses
in an urban area. The site also monitors NO 2 

### and meteorology. During the summer months, high temperatures and longer daylight hours contribute to increases in ozone during the day. In contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which s cavenge the ozone. Elevated PM2.5 concentrations are possible year round, but c oncentrations tend to be highest during the winter months due to moisture content in the air, wood burning activities, other anthropogenic activities, and atmospheric che mistry. PM2.5 concentrations can also increase during wind events because the wind c an cause PM2.5 to become suspended in the air.

Edison Edison, CA is located at the southern end of the Sa n Joaquin Valley with mountains to the east, west, and south. Because the mountains b lock or slow down air flow pollutants can get trapped and build up in the area . Pollutants occur locally and also get transported from upwind locations into the area by the wind. The Edison monitoring site is operated by CARB and is located 9 miles east of the Bakersfield, CA metropolitan area. It began operating in January 1980. The pur pose of the site is to monitor representative concentrations of hourly ozone (SLAM S) from upwind and nearby urban
areas. The site also monitors NO 2 

### and meteorology. During the summer months, high temperatures and longer daylight hours contribute t o increases in ozone during the day. In contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which scavenge the ozone . During the winter months, ozone concentrations decrease due to shorter daylig ht hours and lower temperatures.

Fresno-First Fresno, CA is located in the central part of the Sa n Joaquin Valley with mountains to the east and west. North-south air flow is virtually u nobstructed. Pollutants occur locally and also get transported from upwind locations into the area by the wind. The FresnoFirst monitoring site is operated by CARB and is lo cated in the Fresno, CA metropolitan area. It began operating in January 1990. The pur pose of the site is to monitor representative concentrations of hourly ozone (SLAM S), PM2.5 (FRM and BAM, both SLAMS), and PM10 (FRM and BAM, both SLAMS) response s in an urban area. The site also monitors CO, NO 2 

### , SO 2 

### , NMOC, NMHC, toxics, and meteorology. During theSan Joaquin Valley Air Pollution Control District June 30, 2011

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### summer months, high temperatures and longer dayligh t hours contribute to increases in ozone during the day. In contrast, ozone concentra tions decrease at night with the absence of sunlight and the presence of NOx polluta nts which scavenge the ozone. During the winter months, ozone concentrations tend to be lower due to shorter daylight hours and lower temperatures. Elevated PM2.5 conce ntrations are possible year round, but concentrations tend to be highest during the wi nter months due to moisture content in the air, wood burning activities, other anthropo genic activities, and atmospheric chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air . On rare occasions, this area of the San Joaquin Valley experiences wind events that can carry dust into the area or lift local dust particles into the air. Such events can cause PM10 concentrations to

increase.

Modesto-14 th 

### Street Modesto, CA is located in the northern part of the San Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations or through the Sacramento Delta from the Bay Area. Th e Modesto-14 th 

### Street monitoring site is operated by CARB and is located in the Mode sto, CA metropolitan area. It began operating in January 1981. The purpose of the site is to monitor representative concentrations of hourly ozone (SLAMS), PM2.5 (FRM and BAM, both SLAMS), and PM10 (FRM, SLAMS)responses in local and upwind urba n areas. The site also monitors CO and meteorology. During the summer mon ths, high temperatures and longer daylight hours contribute to increases in oz one during the day. In contrast, ozone concentrations decrease at night with the abs ence of sunlight and the presence of NOx pollutants which scavenge the ozone. During the winter months, ozone concentrations tend to be lower due to shorter dayl ight hours and lower temperatures. Elevated PM2.5 concentrations are possible year rou nd, but concentrations tend to be highest during the winter months due to moisture co ntent in the air, wood burning activities, other anthropogenic activities, and atm ospheric chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air. Occasionally , wind will carry dust across the city and cause PM10 concentrations to increase, but PM10 exceedances are rare.

Oildale Oildale, CA is located at the southern end of the S an Joaquin Valley with mountains to the east, west, and south. Because the mountains b lock or slow down air flow pollutants can get trapped and build up in the area . Pollutants occur locally and also get transported from upwind locations into the area by the wind. The Oildale monitoring site is operated by CARB and is located 6 miles north of Bakersfield, CA within the metropolitan area. It began operating in January 1 980. The purpose of the site is to monitor representative concentrations of hourly ozo ne (SLAMS) responses and PM10 (FRM, SLAMS) every 6 days in an urban area. The si te also monitors meteorology. During the summer months, high temperatures and lon ger daylight hours contribute to increases in ozone during the day. In contrast, oz one concentrations decrease at nightSan Joaquin Valley Air Pollution Control District June 30, 2011

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### with the absence of sunlight and the presence of NO x pollutants which scavenge the ozone. Not only does the metropolitan area generat e its own pollution, it is also the recipient of pollutants that get transported by win d. On rare occasions, this area of the San Joaquin Valley experiences wind events that can carry dust into the area or lift local dust particles into the air. Such events can cause PM10 concentrations to increase.

Shafter Shafter, CA is located at the southern end of the S an Joaquin Valley with mountains to the east and west, and 58 miles to the south. Becau se the mountains to the south are further away, southward air flow is less obstructed through Shafter so pollutant build-up is less pronounced compared to Bakersfield and the towns further south. Pollutants occur locally and wind can transport pollutants int o and through Shafter from nearby and upwind areas. The Shafter monitoring site is op erated by CARB and is located 18 miles northwest of the Bakersfield, CA metropolitan area. It began operating in January 1989. This site was established as a PAMS Type 1 s ite (SLAMS), located in an area upwind of Bakersfield and not to be influenced by u pwind or local ozone precursor
emissions. The site also monitors NO 2 

### , NMOC, NMHC, and meteorology. During the summer months, high temperatures and longer dayligh t hours contribute to increases in ozone during the day. In contrast, ozone concentra tions decrease at night with the absence of sunlight and the presence of NOx polluta nts which scavenge the ozone. Being located upwind of Bakersfield, the Shafter si te tends to have lower ozone concentrations than does the metropolitan area to t he south.

Stockton-Hazelton Stockton, CA is located in the northern part of the San Joaquin Valley with mountains to

the east and west. North-south air flow is virtual ly unobstructed. Pollutants occur locally but the wind also transports pollutants int o the area from upwind locations or through the Sacramento Delta from the Bay Area. Th e Stockton-Hazelton monitoring site is operated by CARB and is located in the Stoc kton, CA metropolitan area. It began operating in June 1976. The purpose of the site is to monitor representative concentrations of ozone (SLAMS), PM2.5 (BAM and FRM , both SLAMS), and PM10 (FRM, SLAMS) in an urban area. The site also monit ors CO, NO 2 

### , toxics, and meteorology. During the summer months, high temper atures and longer daylight hours contribute to increases in ozone during the day. I n contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which scavenge the ozone. During the winter months , ozone concentrations tend to be lower due to shorter daylight hours and lower tempe ratures. Elevated PM2.5 concentrations are possible year round, but concent rations tend to be highest during the winter months due to moisture content in the air, w ood burning activities, other anthropogenic activities, and atmospheric chemistry . PM2.5 concentrations can also increase during wind events because the wind can ca use PM2.5 to become suspended in the air. On rare occasions, wind will carry dus t across the city and cause PM10 concentrations to increase, but PM10 exceedances ar e rare.San Joaquin Valley Air Pollution Control District June 30, 2011

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### Visalia-Church Visalia, CA is located where the central and southe rn parts of the San Joaquin Valley meet. The Sierra Nevada mountain range is approxim ately 20 miles east of Visalia. North-south air flow is virtually unobstructed. Po llutants occur locally and also get transported from upwind locations into the area by the wind. The Visalia-Church monitoring site is operated by CARB. It began oper ating in July 1979. The purpose of the site is to monitor representative concentration s of hourly ozone (SLAMS), PM2.5 (BAM and FRM, both SLAMS), and PM10 (FRM, SLAMS) re sponses from upwind and nearby urban areas. The site also monitors NO 2 

### and meteorology. During the summer months, high temperatures and longer daylight hours contribute to increases in ozone during the day. In contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which s cavenge the ozone. During the winter months, ozone concentrations tend to be lowe r due to shorter daylight hours and lower temperatures. Elevated PM2.5 concentrations are possible year round, but concentrations tend to be highest during the winter months due to moisture content in the air, wood burning activities, other anthropogen ic activities, and atmospheric chemistry. PM2.5 concentrations can also increase during wind events because the wind can cause PM2.5 to become suspended in the air . On rare occasions, wind will carry dust across the city and cause PM10 concentra tions to increase, but PM10

exceedances are rare.

Special Purpose Monitoring Sites

Sequoia-Ash Mountain The Ash Mountain monitoring station is operated by Sequoia National Forest and is located at the southern entrance of Sequoia Nationa l Park at a 1,500-foot elevation. It originally began operating in 1985, though the site has been relocated several times over the years. The site demonstrates the hourly o zone (SPM) response in the foothills. The site also monitors PM2.5 (BAM, SPM) and meteoro logy. On summer days, ozone and precursors can be transported to Ash Mountain f rom other locations. At this location, there are significantly lower hourly emis sions of NOx as compared to urban areas such as Bakersfield, or Fresno, CA. The amou nt of available NOx at Ash Mountain to scavenge the ozone is much lower. Beca use the ozone scavenging at Ash Mountain is much less than the ozone scavenging in urban areas, Ash Mountain can experience elevated ozone concentrations for a 24-h our period during ozone episodes. Since the ozone concentration is already fairly hig h at dawn, only a relatively small

amount of additional ozone can cause levels in the atmosphere to exceed federal

standards.

Sequoia-Lower Kaweah The Lower Kaweah monitoring station is operated by Sequoia National Forest and is located at the southern entrance of Sequoia Nationa l Park at a 6,200-foot elevation. It began operating in April 1987. The site demonstrat es the hourly ozone (SPM) response in a rural area. The site also monitors meteorolog y. On summer days, ozone andSan Joaquin Valley Air Pollution Control District June 30, 2011

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### precursors can be transported to Ash Mountain from other locations. At this location, there are significantly lower hourly emissions of N Ox as compared to urban areas such as Bakersfield, or Fresno, CA. The amount of avail able NOx at Lower Kaweah to scavenge the ozone is much lower. Because the ozon e scavenging at Lower Kaweah is much less than the ozone scavenging in urban are as, Lower Kaweah can experience elevated ozone concentrations for a 24-hour period during ozone episodes. Since the ozone concentration is already fairly high at dawn, only a relatively small amount of additional ozone can cause levels in the atmosphere to exceed federal standards.

Other Sites

Santa Rosa Rancheria
Santa Rosa Rancheria is Tribal land located in the central portion of the San Joaquin Valley in Lemoore, CA. It is 13 miles southwest of Hanford, CA and 39 miles south of the Fresno, CA metropolitan area. The Diablo Mount ain Range is approximately 27
miles east of Santa Rosa Rancheria. North-south ai r flow is virtually unobstructed. Pollutants occur locally and wind transports pollut ants into and through the site from nearby and upwind urban areas as well. The Santa Ro sa Rancheria monitoring site is operated by the Tachi-Yokut tribe. It began operat ing in August 2006. The purpose of the site is to monitor representative concentration s of hourly ozone (SPM) and PM10 responses from upwind and nearby urban areas. Duri ng the summer months, high temperatures and longer daylight hours contribute t o increases in ozone during the day. In contrast, ozone concentrations decrease at night with the absence of sunlight and the presence of NOx pollutants which scavenge the ozone . On rare occasions, this area of the San Joaquin Valley experiences wind events that can carry dust into the area or lift local dust particles into the air. Such events can cause PM10 concentrations to

increase.San Joaquin Valley Air Pollution Control District June 30, 2011

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