SOURCE CATEGORY PM2.5 ROG NOx SO2 NH3*

INDUSTRIAL/COMMERCIAL PROCESSES

PETROLEUM REFINING FACILITIES

Basic Refining Processes 0.1 0.2 -- 0.2 0.1

Wastewater (Oil-Water) Separators -- 1.2 -- -- --

Wastewater Treatment Facilities -- 0.5 -- -- --

Cooling Towers -- 0.9 -- -- --

Flares & Blowdown Systems -- 0.8 1.2 0.6 --

Other Refining Processes -- 0.3 -- -- --

Fugitives -- 0.5 -- -- --

Subtotal 0.2 4.3 1.2 0.9 0.1

CHEMICAL MANUFACTURING FACILITIES

Coating, Inks, Resins & Other Facilities -- 0.1 0.1 2.7 0.2

Pharmaceuticals & Cosmetics 0.4 0.8 1.4 3.2 --

Fugitives - Valves & Flanges -- 0.6 -- -- --

Subtotal 0.4 1.5 1.5 5.9 0.2

OTHER INDUSTRIAL/COMMERCIAL PROCESSES

Bakeries -- 0.8 -- -- --

Cooking(Charbroiling) 1.5 0.9 -- -- --

Cooking(Deep Fat Frying) 0.1 0.1 -- -- --

Cooking(Griddles) 0.2 0.1 -- -- --

Wineries & Other Food & Agr. Processes 0.3 1.1 -- -- --

Metallurgical & Minerals Manufacturing 1.8 0.2 0.2 0.2 0.3

Waste Management 0.6 3.1 -- -- 5.5

Semiconductor Manufacturing -- 0.2 -- -- 0.0

Fiberglass Products Manufacturing -- 0.1 -- -- --

Rubber & Plastic Products Manufacturing -- 0.3 -- -- --

Contaminated Soil Aeration -- 0.1 -- -- --

Other Industrial Commercial 0.4 0.9 -- -- 0.0

Subtotal 4.9 7.9 0.3 0.3 5.9

PETROLEUM PRODUCT/SOLVENT EVAPORATION

PETROLEUM REFINERY EVAPORATION

Storage Tanks -- 3.3 -- -- --

Loading Operations 0.1 0.1 -- -- --

Subtotal 0.1 3.4 -- -- --

FUELS DISTRIBUTION

Natural Gas Distribution -- 0.7 -- -- --

Bulk Plants & Terminals -- 0.7 -- -- --

Trucking -- 2.6 -- -- --

Gasoline Filling Stations -- 5.2 -- -- --

Aircraft Fueling -- 1.1 -- -- --

Recreational Boat Fueling -- 0.9 -- -- --

Portable Fuel Container Spillage -- 3.8 -- -- --

Other Fueling -- 0.4 -- -- --

Subtotal -- 15.3 -- -- --

Winter Emissions tons/day

Bay Area Winter Emissions Inventory for Primary PM2.5 & PM Precursors: 

Year 2010

Table 1

Attachment 1

*Ammonia emission estimates were provided by the Air Resources Board. The ARB ammonia emissions data 

is reported in this table using the Air District’s emissions inventory format.
SOURCE CATEGORY PM2.5 ROG NOx SO2 NH3*

Winter Emissions tons/day

Bay Area Winter Emissions Inventory for Primary PM2.5 & PM Precursors: 

Year 2010

Table 1

OTHER ORGANIC COMPOUNDS EVAPORATION

Cold Cleaning -- 2.7 -- -- --

Vapor Degreasing -- -- -- -- --

Handwiping -- 2.3 -- -- --

Dry Cleaners -- 0.6 -- -- --

Printing -- 4.1 -- -- --

Adhesives & Sealants -- 9.7 -- -- --

Structures Coating -- 21.2 -- -- --

Industrial/Commercial Coating -- 8.1 -- -- --

Storage Tanks -- 0.8 -- -- --

Lightering & Ballsting -- -- -- -- --

Other Organics Evaporation -- 1.5 -- -- --

Subtotal -- 51.0 -- -- --

COMBUSTION - STATIONARY SOURCES

FUELS COMBUSTION

Natural Gas(Space/Water Heating/Cooking) 1.7 1.0 18.3 0.1 --

LPG and Liquid Fuel -- -- 0.5 0.3 --

Solid Fuel (Woodstoves) 3.7 2.8 0.5 0.1 0.5

Solid Fuel (Fireplaces) 13.1 5.3 1.1 0.2 1.2

Cogeneration 0.7 1.9 3.9 0.3 0.6

Power Plants 0.3 0.1 1.0 0.1 0.1

Oil Refineries External Combustion 2.4 1.0 10.5 14.0 0.5

Glass Melting Furnaces - Natural Gas -- -- 0.9 -- --

Reciprocating Engines 0.2 0.5 2.9 0.1 --

Turbines 0.1 -- 0.8 -- --

Landfill/Cement Plant Combustion 1.6 1.4 15.4 3.0 --

Subtotal 23.8 14.0 55.6 18.2 2.8

BURNING OF WASTE MATERIAL

Incineration 0.1 0.1 0.2 -- --

Planned Fires 0.4 0.4 0.2 -- --

Subtotal 0.5 0.4 0.4 -- --

Banked Emissions -- -- -- -- --

Alternative Compliance Allowance -- -- -- -- --

Subtotal (All stationary source categories) 29.8 97.9 59.0 25.3 9.0

COMBUSTION - MOBILE SOURCES

ON-ROAD MOTOR VEHICLES

Passenger Cars 2.3 42.1 35.5 0.4 3.7

Light Duty Trucks<6000lbs 1.0 23.4 27.1 0.2 2.3

Medium Duty Trucks 6001-8500 lbs 0.5 10.1 17.9 0.2 1.8

Light Heavy Duty Trucks 8501-14000lbs 0.4 6.2 23.1 0.1 0.6

Medium Heavy Duty Trucks 14001-33000lbs 0.8 2.4 21.6 -- 0.1

Heavy Heavy Duty Trucks>33000 lbs 1.6 2.8 51.7 0.1 0.1

School/Urban Buses 0.6 1.4 16.9 -- 0.0

Motor-Homes -- 1.4 1.4 -- 0.0

Motorcycles -- 17.5 2.3 -- 0.0

Subtotal 7.3 107.4 197.6 0.9 8.7

*Ammonia emission estimates were provided by the Air Resources Board. The ARB ammonia emissions data 

is reported in this table using the Air District’s emissions inventory format.
SOURCE CATEGORY PM2.5 ROG NOx SO2 NH3*

Winter Emissions tons/day

Bay Area Winter Emissions Inventory for Primary PM2.5 & PM Precursors: 

Year 2010

Table 1

OFF-HIGHWAY MOBILE SOURCES

Lawn and Garden Equipment 0.2 13.6 2.1 -- --

Transportation Refrigeration Units 0.6 1.9 7.7 -- --

Agricultural Equipment 0.3 1.0 5.9 -- --

Construction and Mining Equipment 0.6 1.6 11.7 -- 0.0

Industrial Equipment 0.2 1.1 6.5 -- --

Light Duty Commercial Equipment 0.6 4.5 7.4 -- --

Trains 0.2 0.9 10.7 -- --

Off Road Recreational Vehicles -- 1.3 -- -- --

Ships 0.2 0.4 8.3 1.8 --

Commercial Harborcraft 0.6 1.2 16.1 -- --

Recreational Boats 0.5 8.5 2.3 -- --

Subtotal 4.0 35.9 78.7 1.9 0.0

AIRCRAFT

Commercial Aircraft 0.1 2.4 9.1 0.8 --

General Aviation 0.1 0.5 0.1 -- --

Military Aircraft 0.1 0.7 1.7 0.1 --

Airport Ground Support Equipment -- 0.1 0.8 -- --

Subtotal 0.3 3.7 11.7 0.9 0.0

Subtotal (All mobile source categories) 11.6 147.0 288.0 3.7 8.7

MISCELLANEOUS OTHER SOURCES

Construction Operations 1.0 -- -- -- --

Farming Operations 0.2 -- -- -- --

Entrained Road Dust-Paved Roads 3.5 -- -- -- --

Entrained Road Dust-Unpaved Roads 0.4 -- -- -- --

Wind Blown Dust 0.7 -- -- -- --

Animal Waste 0.9 3.9 -- -- 10.9

Agricultural Pesticides -- 0.6 -- -- 1.1

Non-Agricultural Pesticides -- 0.3 -- -- --

Consumer Products(Excluding Pesticides) -- 44.1 -- -- 0.5

Accidental Fires and Cigarette Smoking 1.2 0.4 0.2 -- --

Human Perspiration/Waste 0.0 0.0 0.0 0.0 7.2

Subtotal 7.9 49.2 0.2 -- 19.6

Subtotal: All Stationary Source Categories 29.8 97.9 59.0 25.3 9.0

Subtotal: All Mobile Source Categories 11.6 147.0 288.0 3.7 8.7

Subtotal: All Miscellaneous Other Sources 7.9 49.2 0.2 19.6

GRAND TOTAL EMISSIONS 49 294 347 29 37

*Ammonia emission estimates were provided by the Air Resources Board. The ARB ammonia emissions data 

is reported in this table using the Air District’s emissions inventory format.
CALIFORNIA AIR RESOURCES BOARD

NOTICE OF PUBLIC MEETING TO CONSIDER APPROVAL OF THE 2012 PM2.5 

EMISSION INVENTORY SUBMITTAL TO THE STATE IMPLEMENTATION PLAN 

FOR THE SAN FRANCISCO BAY AREA

The Air Resources Board (ARB or Board) will conduct a public meeting at the time and 

place noted below to consider the proposed fine particulate matter (PM2.5) Emission 

Inventory State Implementation Plan (SIP) submittal for the San Francisco Bay Area that 

was developed and approved by the Bay Area Air Quality Management District (District). 

If approved, ARB will submit this submittal to the United States Environmental Protection 

Agency (U.S. EPA) for approval as a revision to the California SIP.

DATE: December 6, 2012

TIME: 9:00 a.m.

PLACE: South Coast Air Quality Management District

21865 Copley Drive

Diamond Bar, California 91765

This item may be considered at a two-day meeting of the Board, which will commence 

at 9:00 a.m., December 6, 2012, and may continue at 8:30 a.m., on December 7, 2012. 

This item is scheduled to be heard on the Board’s Consent Calendar. All items on the 

consent calendar can be voted on by the Board immediately after the start of the public 

meeting. Any item may be removed from the consent calendar at the request of a 

Board member or if someone in the audience would like to speak on that item.

In December 2006, the U.S. EPA lowered the 24-hour standard for PM2.5 from 

65 g/m3to 35 g/m3. Effective December 14, 2009, the U.S. EPA designated the San 

Francisco Bay Area as nonattainment for this more stringent 24-hour PM2.5 standard. 

The federal Clean Air Act establishes planning requirements for such designated areas 

that exceed the health-based National Ambient Air Quality Standards (NAAQS). These 

nonattainment areas must develop and implement a SIP that demonstrates how they 

will attain the standards by specified dates. The SIP submittal deadline for the revised 

24-hour PM2.5 standard is December 14, 2012. 

However, under the U.S. EPA’s Clean Data Policy for the Fine Particulate National 

Ambient Air Quality Standards (Clean Data Policy), nonattainment areas that attain the 

NAAQS prior to the SIP submittal deadline are eligible for reduced regulatory 

requirements. 

Based on quality-assured federal reference method monitoring data for 2008-2010, the 

San Francisco Bay Area has demonstrated attainment of the 24-hour PM2.5 NAAQS for

2008-2010. The San Francisco Bay Area continues to attain based on the most recent 
2

air quality data. On December 8, 2011, ARB submitted a request to the U.S. EPA to 

issue a clean data finding under the Clean Data Policy, suspending the majority of the 

planning elements under the Clean Air Act, including the attainment demonstration, 

reasonable further progress demonstration, reasonably available control measures, and 

contingency elements of a SIP. 

To address the remaining SIP requirement, the District developed the 2010 Bay Area 

Winter Emissions Inventory for Primary PM2.5 and PM Precursors (Emission Inventory

SIP Submittal). The District Board of Directors adopted the Emission Inventory SIP 

Submittal at a public hearing on November 7, 2012. 

ARB staff has reviewed the District’s Emission Inventory SIP submittal and has 

concluded that it meets the applicable Clean Air Act requirements. Staff is 

recommending that the Board approve the Emission Inventory SIP Submittal as a 

revision to the California SIP. 

ARB staff will present a written Staff Report prior to the meeting. Copies of the report 

may be obtained from ARB’s Public Information Office, 1001 I Street, First Floor, 

Environmental Services Center, Sacramento, California, 95814, (916) 322-2990. The 

report may also be obtained from ARB’s website at: 

http://www.arb.ca.gov/planning/sip/sip.htm

Interested members of the public may present comments verbally or in writing at the 

meeting and may be submitted by postal mail or by electronic submittal before the 

meeting. To be considered by the Board, written comments not physically submitted at 

the meeting must be received no later than 12:00 noon, December 5, 2012, and 

addressed to the following: 

Postal mail: Clerk of the Board, Air Resources Board

1001 I Street, Sacramento, California 95814

Electronic submittal: http://www.arb.ca.gov/lispub/comm/bclist.php 

You can sign up online in advance to speak at the Board meeting when you submit 

an electronic board item comment. For more information go to: 

http://www.arb.ca.gov/board/online-signup.htm. 

Please note that under the California Public Records Act (Government Code 

section 6250 et seq.), your written and verbal comments, attachments, and associated 

contact information (e.g., your address, phone, email, etc.) become part of the public 

record and can be released to the public upon request. 

ARB requests that written and email statements on this item be filed at least 10 days 

prior to the meeting so that ARB staff and Board members have additional time to 

consider each comment. Further inquiries regarding this matter should be directed to

Ms. Sylvia Vanderspek, Manager, Particulate Matter Analysis Section, Planning and 
3

Technical Support Division at (916) 324-7163 or Ms. Elizabeth Melgoza, Air Pollution 

Specialist, Particulate Matter Analysis Section, Planning and Technical Support Division 

at (916) 322-6161.

SPECIAL ACCOMMODATION REQUEST

Special accommodation or language needs can be provided for any of the following:

 An interpreter to be available at the hearing;

 Documents made available in an alternate format or another language;

 A disability-related reasonable accommodation.

To request these special accommodations or language needs, please contact the Clerk 

of the Board at (916) 322-5594 or by facsimile at (916) 322-3928 as soon as possible, 

but no later than 10 business days before the scheduled Board hearing. 

TTY/TDD/Speech to Speech users may dial 711 for the California Relay Service.

Comodidad especial o necesidad de otro idioma puede ser proveído para alguna de las 

siguientes:

 Un intérprete que esté disponible en la audiencia;

 Documentos disponibles en un formato alterno u otro idioma;

 Una acomodación razonable relacionados con una incapacidad. 

Para solicitar estas comodidades especiales o necesidades de otro idioma, por favor 

llame a la oficina del Consejo al (916) 322-5594 o envíe un fax a (916) 322-3928 lo más 

pronto posible, pero no menos de 10 días de trabajo antes del día programado para la 

audiencia del Consejo. TTY/TDD/Personas que necesiten este servicio pueden marcar 

el 711 para el Servicio de Retransmisión de Mensajes de California.

CALIFORNIA AIR RESOURCES BOARD

/s/

__________________________________

James N. Goldstene

Executive Officer

Date: November 13, 2012

The energy challenge facing California is real. Every Californian needs to take immediate 

action to reduce energy consumption. For a list of simple ways you can reduce demand and cut 

your energy costs, see our website at www.arb.ca.gov.



1

STATE OF CALIFORNIA

CALIFORNIA AIR RESOURCES BOARD

STAFF REPORT

ANALYSIS OF THE 

2012 PM2.5 EMISSIONS INVENTORY SUBMITTAL 

TO THE STATE IMPLEMENTATION PLAN FOR 

THE SAN FRANCISCO BAY AREA 

I. BACKGROUND

The federal Clean Air Act (Act) establishes planning requirements for those areas that 

exceed the health-based National Ambient Air Quality Standards (standards). Areas 

are designated as nonattainment based on monitored exceedances of these standards. 

These nonattainment areas must develop and implement a State Implementation Plan 

(SIP) that demonstrates how they will attain the standards by specified dates. 

In December 2006, the United States Environmental Protection Agency (U.S. EPA) 

lowered the 24-hour standard for fine particulate matter (PM2.5) from 65 g/m3to 

35 g/m3. Effective December 14, 2009, U.S. EPA designated the San Francisco Bay 

Area in the Bay Area Air Quality Management District (District) as nonattainment for this

more stringent 24-hour PM2.5 standard. The subsequent SIP submittal deadline is 

December 14, 2012. 

II. CLEAN DATA POLICY REQUIREMENTS

Under the U.S. EPA’s Clean Data Policy for the Fine Particulate National Ambient Air 

Quality Standards (Clean Data Policy), areas designated nonattainment that 

subsequently attain the standard prior to the SIP submittal deadline are eligible for 

reduced regulatory requirements. Based on quality-assured federal reference method 

monitoring data for 2009-2011, the San Francisco Bay Area has demonstrated 

attainment of the 24-hour PM2.5 standard (Table 1). 

Table 1

98th Percentile

(g/m3)

3-year Average

(g/m3)

2008 2009 2010 2011 2008-2010 Design Value 2009-2011 Design Value

36 34.1 29.2 30.6 31 30
2

On December 8, 2011, The Air Resources Board (ARB) submitted a request to

U.S. EPA to find the San Francisco Bay Area in attainment of the 35 g/m324-hour 

PM2.5 standard. This clean data finding under the Clean Data Policy suspends the 

majority of the planning elements under the Act, including the attainment demonstration, 

reasonably available control measures, and contingency elements of a SIP. The only 

planning element required under the Clean Data Policy is an emission inventory. Other 

requirements under the Act, specifically transportation conformity and new source 

review, are still applicable and are discussed in Section IV of this document.

III. EVALUATION OF THE SAN FRANCISCO BAY AREA EMISSION INVENTORY

The District developed the 2010 Bay Area Winter Emissions Inventory for Primary 

PM2.5 and PM Precursors (Emission Inventory SIP Submittal) to address the emission 

inventory requirements under the Clean Data Policy. The District Board of Directors 

adopted the Emission Inventory SIP Submittal at a public hearing on November 7, 2012. 

An essential tool to support the evaluation, control, and mitigation of air pollutants, an 

emission inventory is a systematic listing of air pollutant sources, along with an 

accounting of the amount of pollutants emitted by each source or category over a given 

period of time. This accounting is an estimate of emissions, not direct ambient 

concentration measurements. U.S. EPA requires states to submit an attainment year 

inventory that includes directly emitted PM2.5 emissions, as well as emissions of 

precursors that contribute to the formation of particles formed through chemical 

reactions in the atmosphere, in particular, oxides of nitrogen (NOx), oxides of sulfur 

(SOx), reactive organic gases (ROG), and ammonia (NH3).

In addition, U.S. EPA allows the use of a seasonal inventory, rather than an annual 

inventory, when it has been demonstrated that the seasonal emissions have 

significantly led to the original nonattainment status. Analysis of daily air quality data

has demonstrated that high PM2.5 concentrations occur primarily during the winter 

season. Exceedances during other seasons have been demonstrated to have been 

influenced by exceptional events, such as wildfires, but are outside of regulatory control. 

The District’s Emission Inventory SIP Submittal is the most up-to-date emission 

inventory for the San Francisco Bay Area. Based on the daily winter season PM2.5

emissions for 2010, it is typical of the 2008-2010 attainment demonstration years. The 

winter-time 2010 baseline inventory includes PM2.5, NOx, SOx, ROG, and NH3

emissions. Residential wood burning and gasoline and diesel vehicles comprise about 

two thirds of the directly emitted PM2.5 emissions. On-road motor vehicles make up the 

largest source of NOx and ROG emissions. 
3

IV. OTHER CLEAN AIR ACT REQUIREMENTS

a. Conformity

The Act requires that procedures be in place to ensure that there is conformity of federal 

actions and federally funded transportation projects efforts to attain federal air quality 

standards. Under the Clean Data Policy, the District had a choice to either set 

transportation conformity budgets or allow the existing transportation conformity process 

to continue. The District chose to allow the existing process to continue. Under this 

process, the District works closely with the Metropolitan Transportation Commission to 

ensure that emissions from new transportation projects are less than the baseline (or 

attainment year) emissions.

b. New Source Review

U.S. EPA’s New Source Review (NSR) requirements specify that there must be a 

method to identify and quantify allowable emissions of pollutants from construction and 

operation of major new or modified stationary sources in the District. Permits for new or 

modified stationary sources are required. This requirement is met with a revised District 

rule (Regulation 2) implementing NSR requirements.

V. STAFF RECOMMENDATION

ARB staff has reviewed the 2010 Bay Area Winter Emissions Inventory for Primary 

PM2.5 and PM Precursors and consulted with District staff during this review. ARB staff 

finds that the Emission Inventory SIP Submittal meets all applicable Act and Clean Data 

Policy requirements. Therefore, staff recommends that the Board adopt the Emission 

Inventory SIP Submittal as a revision to the California SIP for submittal to U.S. EPA.