ARB Staff Report 

Status Report on the 

State Strategy 

for California’s 2007 State Implementation Plan (SIP) 

and 

Proposed Revision to the SIP 

Reflecting Implementation of the 2007 State Strategy 

Release Date: March 24, 2009 

Hearing Date: April 23-24, 2009 

 

i

Highlights 

• In 2007 and 2008, the Air Resources Board (ARB or Board) adopted rules for ten 

measures that were identified in the 2007 State Strategy. In total, this represents 

11 separate rulemakings. 

• ARB has also adopted three rules that will achieve ozone and fine particulate 

matter (PM2.5) precursor reductions that were not identified as specific 

measures at the time the 2007 State Strategy was adopted. 

• California now has in place programs and regulations that will achieve 95 percent 

of the reductions in oxides of nitrogen (NOx) needed to meet the PM2.5 standard 

in the San Joaquin Valley and 87 percent of the reductions needed for PM2.5 

attainment in the South Coast. 

• California has achieved over 93 percent of the reductions needed from near-term 

measures for ozone attainment in the San Joaquin Valley and 90 percent of the 

reductions needed in the South Coast. 

 
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iii

Table of Contents 

Foreword ......................................................................................................................... v 

Part One: Status Report 

Status of Implementation...................................................................................... 1 

Recent ARB Rulemakings -- 2007 and 2008........................................................ 4 

Emission Reductions from Recently Adopted ARB Rules .................................... 4 

Staff Reports for Recently Adopted ARB Rules.................................................... 8 

Analysis of Environmental Impacts..................................................................... 10 

Part Two: Technical Revision to the 2007 State Strategy 

U.S. EPA's Approval Criteria for SIPs that Rely on Enforceable Commitments to 

Achieve Emission Reductions ............................................................................ 11 

State Implementation Plan Commitments .......................................................... 12 

Commitment to Reduce Emissions..................................................................... 20 

Commitment to Propose Defined New SIP Measures........................................ 22 

Commitments for Remaining New SIP Measures............................................... 24 

Commitment to Reduce Emissions via Long-Term Strategy .............................. 25 

Withdrawal of Chapter 4 ..................................................................................... 27 
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Foreword

The Air Resources Board (ARB or Board) adopted the 2007 State Strategy in 

September 2007 as a revision to the California State Implementation Plan (SIP). Since 

then, three major things have occurred. First, ARB has adopted comprehensive 

measures to implement the 2007 State Strategy. Second, in December 2008, ARB 

adopted the Scoping Plan mandated by AB 32, the California Global Warming Solutions 

Act of 2006. Actions outlined in the Scoping Plan will help reduce ozone and particulate 

pollution over the ozone attainment timeline of the SIP. Third, the nature of our national 

and State economies is shifting, and as a result, ARB expects California’s economy to 

be greener in the future. 

California’s SIP relies on advanced technologies to be developed between now and 

2023 to achieve the last increment of emission reductions needed for ozone attainment. 

With the State’s focus on climate change and the completion of the Scoping Plan, there 

is now an opportunity to speed progress by linking our SIP efforts with our climate 

change efforts. In particular, ARB staff is working to align the SIP’s new technology 

needs with the State’s actions to reduce greenhouse gases. California’s actions to 

reduce greenhouse gas emissions will help transition the State to new technologies, 

improved energy efficiency across the economy, and better land use patterns that are 

also necessary to meet air quality standards and other public health goals. The 

additional benefits of these actions are significant and will increase with further 

reductions in fossil fuel combustion. 

The 2007 State Strategy was based on the best assumptions about California’s future 

available at the time, assumptions about the nature of economic growth, the availability 

of incentive funds, land use and transportation patterns, technology advancement, and 

more. All of these factors continue to change. Responding to these changes is part of 

our ongoing evaluation of SIP implementation. Over the next years, as ARB completes 

implementation of the SIP, staff will be looking at these changes and their implications 

to the State’s air quality program. Frequent updates to the SIP will be needed to 

incorporate new data into the SIP’s technical foundation and to map out the next round 

of emission reduction measures.

1

Part One: Status Report 

Status of Implementation

In September 2007, ARB adopted the 2007 State Strategy for the California SIP. In 

doing so, the Board set out how the State will achieve the needed emission reductions 

from cars, trucks, locomotives, consumer products, and more to meet health-based 

federal air quality standards. This report documents that progress in terms of actions 

taken by ARB and emission reductions achieved in implementing the SIP. 

ARB is on track in implementing the 2007 State Strategy. In 2007 and 2008, ARB 

adopted 14 pollution-reducing regulations to implement the SIP. Eleven of these 

regulations implement 10 of the new measures identified in the 2007 State Strategy. 

Three additional measures were adopted that were not envisioned in the 2007 State 

Strategy but will help California meet the commitments in the 2007 State Strategy. 

The most significant of the rules adopted to implement the 2007 State Strategy is the 

cleaner in-use heavy-duty diesel truck rule adopted in December 2008. This rule 

represents a multi-year effort and is our most aggressive undertaking yet to turn over 

the legacy fleet of engines and replace them with the cleanest technology available. It 

pushes the cleanup of diesel engines beyond what has ever been done before in the 

country. 

The in-use truck rule will accelerate the introduction of newer, cleaner truck and bus 

engines in California – by 2023 all of the heavy-duty trucks and buses in California will 

be 2010 model year or newer (the cleanest available). The chart below illustrates the 

accelerated phase-in of newer, cleaner trucks to the entire California fleet. 

Population by Model Year 

Heavy-duty Trucks and Buses in California 

All Pre-2007 2007-09 2010 and 

newer 

2014 23% 22% 55% 

2020 5% 9% 87% 

2023 0% 0% 100% 

The truck measure in the 2007 State Strategy envisioned modernizing truck fleets 

operating in California to the equivalent of the cleanest adopted new engine (2010) 

standards. The adopted regulation meets that goal at the pace necessary to meet all 

the SIP target dates. The adopted regulation meets or exceeds the combined NOx and 

PM2.5 SIP fleet rule targets in both the South Coast and San Joaquin Valley for all 

years. In 2014, in the South Coast, the SIP target is met with slightly more PM2.5 

reductions and slightly less NOx than expected. The PM2.5 modeling used in the South 

Coast Air District SIP shows that direct PM2.5 emission reductions are relatively more 

effective in reducing ambient particulate levels than are NOx reductions. The rule 

achieves 60 tons per day of NOx in 2014 plus the equivalent of six more tons per day of 

NOx that come from extra PM2.5 reductions. 
2

The table below summarizes the progress made from 2002 emission levels (the 

baseline for the SIP inventory) for NOx reductions, the key pollutant that must be 

reduced for both PM2.5 and ozone attainment. It represents recent rules adopted at the 

state level and, for the South Coast in 2014, recent rules adopted at the local level. The 

majority of the reductions achieved to date have come from statewide mobile source 

strategies. 

With its actions since adopting the State Strategy in September 2007, California now 

has in place programs and regulations that will achieve 95 percent of the NOx 

reductions needed to meet the PM2.5 standard in the San Joaquin Valley and 

87 percent of the reductions needed for PM2.5 attainment in the South Coast. 

California has also achieved 93 percent of the reductions needed from near-term 

measures for ozone attainment in the San Joaquin Valley and 90 percent of the 

reductions needed in the South Coast. Additional reductions are still needed from longterm measures. These reductions are not included in the following table. 

NOx Reductions for 2014 PM2.5 Attainment 

(starting from 2002* emission levels) 

 Needed 

(tpd) 

Achieved 

(tpd) 

Percent 

Progress 

San Joaquin* 284 * 269 * 95% * 

South Coast 641 560 87% 

 

NOx Near-term Reductions for 2023 Ozone 

Attainment (starting from 2002 emission levels) 

 

San Joaquin 402 375 93% 

South Coast 724 653 90% 

∗ San Joaquin Valley 2014 calculations start from 2005 emission levels rather 

than 2002 levels. 

Note: The percent progress numbers include reductions from the current 

program and recently adopted measures. 

In addition to reporting on the status of ARB’s efforts to implement the 2007 State 

Strategy, this report includes proposed technical amendments to the SIP that the 

U.S. Environmental Protection Agency (U.S. EPA) has asked ARB to make to aid 

U.S. EPA’s approval of the SIP. The amendments account for reductions achieved 

since adoption of the 2007 State Strategy, clarify ARB’s legal commitments in light of 

U.S. EPA’s approval criteria, and extend the description of the long-term strategy for 

identifying future technologies to achieve the last increment of reductions. 

These amendments do not change the emission reductions in tons per day of NOx, 

reactive organic gases (ROG), oxides of sulfur (SOx), and direct PM2.5 that the Board 

committed to achieve by specific years when it adopted the 2007 State Strategy. 

The amendments also include the commitment for emission reductions in the 

Sacramento area that the Board will consider at its March 2009 meeting along with 
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approval of the SIP for the Sacramento area. The reductions in Sacramento from the 

statewide measures in the 2007 State Strategy had not been quantified at the time the 

2007 State Strategy was adopted and so are not reflected in the 2007 State Strategy. 

For clarity, staff is now proposing to reflect this commitment within the State Strategy. 

ARB is also implementing its 2006 Emission Reduction Plan for Ports and Goods 

Movement. This plan outlines strategies to reverse the growth in goods movementrelated emissions and reduce risk from exposure to diesel particulate emissions. Most 

of the strategies in the plan are also measures in the 2007 State Strategy and the 

regulations adopted in 2007 and 2008 that reduce PM2.5 emissions implement both of 

these plans. 

In addition to adopting regulations that reduce ozone- and PM2.5-forming emissions, 

ARB has been busy developing a scoping plan that outlines how California will meet its 

aggressive greenhouse gas emission reduction goals. ARB adopted the Scoping Plan 

in December 2008. While the Scoping Plan targets climate change emissions, many of 

the measures in the Scoping Plan will achieve ozone and PM2.5 co-benefits. Staff is in 

the process of calculating those regional co-benefits for years critical to the SIP. Staff 

will include those estimates in future status reports. 
4

Recent ARB Rulemakings--2007 and 2008 

The following table summarizes the 10 measures that were identified in the 2007 State 

Strategy for which ARB has adopted implementing rules. In total, this represents 

11 separate rulemakings. The column labeled Schedule Adoption Year was the year 

ARB targeted in the SIP for action. The column next to that is the year that the Board 

adopted the implementing rule. 

Recently Adopted Proposed New SIP Measures 

Scheduled 

Adoption 

Year 

Date Adopted by 

ARB 

Cleaner In-Use Off-Road Equipment July 2007 

Modifications to Reformulated Gasoline Program – Phase 3 June 2007 

Cleaner Main Ship Fuel July 2008 

Clean Up Existing Harbor Craft November 2007 

Enhanced Vapor Recovery for Above Ground Storage 

Tanks (a)

2007 

June 2007 

Cleaner In-Use Heavy-Duty Trucks December 2008 

Port Truck Modernization December 2007/ 

December 2008 

Ship Auxiliary Engines (Cold Ironing) December 2007 

Consumer Products Program I 

2008 

June 2008 and 

November 2008 

Additional Evaporative Emission Standards [partial] 

 – Portable Outboard Marine Tanks (a) 2009-2010 Partial in September 2008 

(a) While we committed to adopting these measures in the 2007 State Strategy, the emissions from these 

sources were not included in the inventory baseline and therefore the reductions are not shown in the 

emission reduction tables to follow. 

ARB has also adopted the three rules in the following table that will achieve ozone and 

PM2.5 precursor reductions that were not identified as specific measures at the time the 

2007 State Strategy was adopted. Although not called out in the SIP, these rules will 

help clean the air and ARB will credit any reductions achieved toward fulfillment of 

ARB’s commitment to reduce emissions by specified amounts in specific years. 

Additional Emission Reduction Strategies Adopted Date Adopted by 

ARB 

Light-duty Vehicle Catalyst Replacement October 2007 

Greenhouse Gas Emissions from Heavy-duty Vehicles December 2008 

Large Spark Ignition Engines > 1 L, Rule Amendment November 2008 

Emission Reductions from Recently Adopted ARB Rules

The charts on the following pages show the emission reductions achieved from 

measures recently adopted by ARB. 
5

Emission Reductions from Recently Adopted (2007-2008) SIP Measures (tons per d

South Coast 

2014 2020 

Proposed New Measures NOx ROG

Direct

PM2.5 SOx NOx ROG 

Passenger Vehicles 2.0 8.5 -- -- 1.4 6.2 

Smog Check Improvements (BAR) [partial] 2.0 4.1 NYQ -- 1.4 3.2 Modifications to Reformulated Gasoline Program -- 4.4 -- -- -- 3.0 

Heavy-Duty Trucks 59.7 5.0 3.5 -- 27.3 2.1 

Cleaner In-Use Heavy-Duty Trucks 59.7 5.0 3.5 -- 27.3 2.1 

Goods Movement Sources 29.1 0.1 2.6 17.4 37.2 0.0 

Ship Auxiliary Engine Cold Ironing & Clean Technology 25.4 0.1 0.5 0.3 34.1 0.0 Cleaner Main Ship Engines and Fuel [fuel portion only] 1.3 -- 1.9 17.0 1.6 -- Port Truck Modernization (reductions included in Heavy-Duty Trucks) 

-- -- -- -- -- -- 

Cleaner Line-Haul Locomotives NYQ NYQ NYQ NYQ NYQ NYQ Clean Up Existing Harbor Craft 2.4 0.1 0.1 -- 1.4 -- 

Off-Road Equipment 10.5 2.7 2.6 -- 18.7 2.9 

Cleaner In-Use Off-Road Equipment (>25hp) (a) 10.5 2.7 2.6 -- 18.7 2.9 

Areawide Sources -- 1.8 -- -- -- 2.5 

Consumer Products Program [partial] -- 1.8 -- -- -- 2.5 

Emission Reductions from Recently Adopted New Measures 101.3 18.1 8.7 17.4 84.6 13.7 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. (a) Benefits from rule as adopted by ARB. Does not reflect February 2009 budget agreement impacts. 
6

Emission Reductions from Recently Adopted (2007-2008) SIP Measures (tons per d

San Joaquin Valley 

2014 2017 2020 

Proposed New Measures NOx ROG

Direct 

PM2.5 SOx NOx NOx ROG 

Passenger Vehicles 0 3.7 0 -- 0 0 2.2 

Smog Check Improvements (BAR) [partial] 0.0 0.8 0.0 -- 0.0 0.0 0.6 Modifications to Reformulated Gasoline Program -- 2.9 -- -- 0.0 0.0 1.6 

Heavy-Duty Trucks 65.6 4.3 4.3 -- 48.8 28.7 1.6 

Cleaner In-Use Heavy-Duty Trucks 65.6 4.3 4.3 -- 48.8 28.7 1.6 

Goods Movement Sources 0.0 0.0 0.0 -- 0.1 0.1 0.0 

Cleaner Line-Haul Locomotives NYQ NYQ NYQ NYQ NYQ NYQ NYQ Clean Up Existing Harbor Craft 0.0 0.0 0.0 -- 0.1 0.1 0.0 

Off-Road Equipment 3.7 0.9 0.8 -- 5.4 7.0 1.0 

Cleaner In-Use Off-Road Equipment (>25hp) (a) 3.7 0.9 0.8 -- 5.4 7.0 1.0 

Areawide Sources -- 2.0 -- -- -- -- 2.2 

Consumer Products Program [partial] -- 0.5 -- -- -- -- 0.7 

 Pesticides: DPR 2008 Pesticide Plan -- 1.5 -- -- -- -- 1.5 Emission Reductions from Recently Adopted New Measures 69.3 10.9 5.1 -- 54.3 35.8 7.0 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. DPR = Department of Pesticide regulation 

Emission reductions from individual measures may not add to total due to rounding. 

(a) Benefits from rule as adopted by ARB. Does not reflect February 2009 budget agreement impacts. 
7

Emission Reductions from 

Recently Adopted (2007-2008) New SIP Measures (tons per day)

Sacramento 

2018 

Proposed New Measures NOx ROG Passenger Vehicles 0.0 1.6 

Smog Check Improvements (BAR) [partial] 0.0 0.5 Modifications to Reformulated Gasoline Program -- 1.1 

Heavy-Duty Trucks 9.5 0.8 

Cleaner In-Use Heavy-Duty Trucks 9.5 0.8 

Goods Movement Sources 0.3 0.0 

Clean Up Existing Harbor Craft 0.3 0.0 

Off-Road Equipment 1.9 0.4 

Cleaner In-Use Off-Road Equipment (>25hp) (a) 1.9 0.4 

Areawide Sources -- 0.3 

Consumer Products Program [partial] -- 0.3 

Emission Reductions from Recently Adopted New Measures 11.7 3.1 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. (a) Benefits from rule as adopted by ARB. Does not reflect February 2009 budget agreement impacts. 
8

Staff Reports for Recently Adopted ARB Rules 

For each of the rulemakings discussed in this report, ARB staff has developed and 

published extensive documentation. This documentation includes formal staff reports 

and the materials required for rule adoption under the Administrative Procedures Act, as 

well as factsheets and workshop presentations. Altogether, this information describes 

in detail the rule structure as well as the method, data, and results of the emission 

reduction benefit calculations. Below are links to this detailed information. 

Measures adopted in 2007

Regulation for In-Use Off-Road Diesel Vehicles 

http://www.arb.ca.gov/regact/2007/ordiesl07/ordiesl07.htm 

Proposed 2007 Amendments to Phase 3 California Reformulated Gasoline Regulations 

http://www.arb.ca.gov/regact/2007/carfg07/carfg07.htm 

Regulations to Reduce Emissions from Diesel Auxiliary Engines on Ocean-Going 

Vessels While At-Berth at a California Port 

http://www.arb.ca.gov/regact/2007/shorepwr07/shorepwr07.htm 

Proposed Regulation for Commercial Harbor Craft 

http://www.arb.ca.gov/regact/2007/chc07/chc07.htm 

Adoption of Regulations for the Certification and Testing of Gasoline Vapor Recovery 

Systems Using Aboveground Storage Tanks 

http://www.arb.ca.gov/regact/2007/ast07/ast07.htm 

Amendments to Regulations Regarding New Aftermarket and Used Catalytic 

Converters Offered for Sale and Use in California 

http://www.arb.ca.gov/regact/2007/amcat07/amcat07.htm 

Measures adopted in 2008

Regulation to Reduce Emissions from In-Use Diesel Vehicles and Equipment, Vehicle 

Exhaust Emissions Standards and Test Procedures, and Commercial Motor Vehicle 

Idling http://www.arb.ca.gov/regact/2008/truckbus08/truckbus08.htm

Regulation to Reduce Greenhouse Gas Emissions from Heavy-duty Vehicles 

http://www.arb.ca.gov/regact/2008/ghghdv08/ghghdv08.htm

Fuel Sulfur and Other Operational Requirements for Ocean-Going Vessels Within 

California Waters and 24 Nautical Miles of the California Baseline 

http://arb.ca.gov/regact/2008/fuelogv08/fuelogv08.htm 
9

Amendments to the California Consumer Products Regulation 

http://www.arb.ca.gov/regact/2008/cp2008/cp2008.htm 

Additional evaporative emission standards: 

Amendments to the Current Regulations for Large Spark-ignition Engines with an 

Engine Displacement Less Than or Equal to One Liter

http://www.arb.ca.gov/regact/2008/lsi2008/lsi2008.htm 

Bureau of Automotive Repair Actions

Smog Check Improvements: 

∗ Visible Smoke Test 

∗ Consumer Assistance Program Vehicle Retirement Option Eligibility 

http://www.bar.ca.gov/80_BARResources/05_Legislative/RegulatoryActions/Regulatory

Actions.html
10

 

Analysis of Environmental Impacts 

This report includes proposed technical amendments to the SIP that U.S. EPA has 

asked ARB to make to aid U.S. EPA’s approval of the SIP. ARB staff has concluded 

that the proposed amendments to the SIP will not result in any significant adverse 

environmental impacts, for the following reasons. 

The proposed SIP amendments quantify the reductions that have been achieved since 

adoption of the 2007 State Strategy, clarify ARB’s legal commitments in light of 

U.S. EPA’s approval criteria, and extend the description of the long-term strategy for 

identifying future technologies to achieve the last increment of reductions. The 

proposed amendments do not change the amount of NOx, ROG, SOx, and direct PM2.5 

emission reductions that the Board committed to achieve by specific years when it 

adopted the 2007 State Strategy. 

The amendments also include the commitment for emission reductions in the 

Sacramento area, since Sactamento’s attainment plan will be considered by the Board 

at its March 26, 2009 meeting when it considers approval of the SIP for the Sacramento 

area. The reductions in Sacramento from the statewide measures in the 2007 State 

Strategy had not been quantified at the time the 2007 State Strategy was adopted and 

so were not reflected in the 2007 State Strategy. For clarity, staff is now proposing to 

amend the State Strategy to reflect this commitment. 

ARB prepared an environmental analysis for the 2007 State Strategy prior to its 

approval by the Board in September 2007. Various measures identified in the 

2007 State Strategy have been adopted by the Board since that time, and separate, 

additional environmental analyses were also prepared by ARB prior to the adoption of 

each of these measures. As discussed above, the proposed SIP revision simply 

quantifies the emission reductions that have been achieved by these already-adopted 

measures, and no changes have been made to the underlying commitments in the 

2007 State Strategy to achieve specified emission reductions by specific dates. 

Therefore, staff has concluded that the proposed SIP amendments will not result in any 

significant adverse environmental impacts. 
11

Part Two: Technical Revision to the 2007 State Strategy 

The following pages completely replace the corresponding sections in the April 26, 2007 

Revised Draft Air Resources Board’s Proposed State Strategy for California’s 2007 

State Implementation Plan. This revision includes the clarifying changes requested by 

U.S. EPA to aid U.S. EPA approval and it quantifies the emission reductions from the 

State Strategy in Sacramento. It also includes the changes and additions made by the 

Board to the April 2007 draft when it adopted the State Strategy related to its 

commitments to reduce emissions contained in Attachment B to resolution 07-08. 

Specifically, the following replaces all material in the April 2007 draft document starting 

on page 58 with the heading “State Implementation Plan Commitments” up to but not 

including on page 67 the section titled, “Role of Funding and Incentives Programs.” 

U. S. EPA's Approval Criteria for SIPs that Rely on Enforceable Commitments to 

Achieve Emission Reductions 

U.S. EPA has identified three criteria which SIPs that rely on enforceable commitments 

for emission reductions need to meet to be approvable. The first criterion is that the 

commitment be for a limited portion of the needed emission reductions. Most of the 

emission reductions needed for attainment in the South Coast and San Joaquin Valley 

will come from already adopted SIP measures. Consequently, the commitments for 

reductions from new measures are a limited portion of the total needed. Further, the 

tables in the section titled Commitment to Reduce Emissions show the State's success 

already in fulfilling its commitment for emission reductions. ARB has already adopted 

regulations that will provide a majority of the emission reductions associated with 

proposed new measures in the 2007 State Strategy. As a result, what’s left to achieve 

out of the commitment is now only 51 tpd NOx, 28 tpd ROG, in the South Coast; and 7 

tpd NOx, 12 tpd ROG, in the San Joaquin Valley in 2014. 

U.S. EPA's second approval criterion is that the state is capable of fulfilling its 

commitment. ARB's performance in meeting its obligations both under this SIP and 

prior SIPs is solid evidence that the State is capable of adopting the regulations to 

which it commits. The list of ARB SIP Control Measures (1994-2006) on page 38 of the 

State Strategy also shows the State's record of continuous accomplishment in 

developing, adopting, and implementing successfully a wide range of ambitious, 

innovative controls to which the State committed in prior SIPs. ARB has experienced 

staff and other resources needed to complete the tasks associated with development of 

controls to achieve the relatively small remaining near-term measure reductions, and 

ARB reiterates its determination to continue expeditious development of these 

measures. 

U.S. EPA's third approval criterion is that the commitment be for a reasonable and 

appropriate period of time. ARB has committed to a schedule of bringing the proposed 

new SIP measures to the board for rulemaking consideration. The schedule calls for 

four of the five remaining ARB measures to be presented this year or the following year. 

Given the variety of difficult issues to address in the complex process of regulatory 
12

development, this is an expeditious schedule. The fifth measure, Consumer Products 

Program II, is scheduled for board consideration in 2010-2012. This follows intensive 

efforts by ARB resulting in successful adoption on June 26, 2008 of new or more 

stringent regulations for more than 20 product categories and further product categories 

in November 2008. Because of the need to collect data on product formulation and use, 

to review control options for the challenging categories that remain, and to resolve 

complex issues relating to product performance, this schedule is expeditious. 

The seventh measure, Accelerated Introduction of Cleaner Line-haul Locomotives, is 

dependant on U.S. EPA adopting Tier 4 standards for locomotive engines. Now that the 

new standards are adopted, ARB commits to working with the railroad companies to 

accelerate cleanup of the locomotive fleet. 

ARB is also working with the Bureau of Automotive Repair (BAR) to develop and 

institute successfully the Smog Check program enhancements. BAR progress to date 

includes the addition of diesel vehicles to the inspection program through state 

legislation (AB 1488, 2007) and authority to conduct visible smoke tests 

(AB 1870, 2006). BAR regulations in progress will increase the stringency of the tests 

by setting lower cut points used to determine if the vehicle initially passes or fails the 

Smog Check test. 

Inasmuch as reductions from the enforceable commitment for emission reductions are 

not relied upon in meeting the reasonable further progress provisions for any area, the 

adoption and implementation schedule to fulfill the commitment will not jeopardize 

attainment. Further, the State Strategy includes an enforceable commitment to achieve 

all reductions needed for attainment by the attainment year applicable to each area. 

State Implementation Plan Commitments

This section sets forth the State’s SIP commitments for the 2007 State Strategy for the 

areas that need the emission benefits from the proposed, new State measures to 

demonstrate attainment – the South Coast Air Basin, the San Joaquin Valley, the 

Coachella Valley, and the Sacramento Metro Area. 

The State’s SIP commitments consist of three components: 

1. A commitment to achieve aggregate emission reductions by specific dates; 

2. A commitment to propose defined new SIP measures; and 

3. A long-term strategy commitment. 

The total emission reductions and the obligation to propose specific measures for Board 

consideration would become enforceable upon approval by U.S. EPA of the State 

Strategy and each district’s attainment plan. The commitments for NOx, ROG and 

PM2.5 emission reductions are calculated using the summer planning inventory 

described in Appendix A to the Proposed State Strategy and progress will be tracked 

using the same inventory to assess compliance. However, the PM2.5 standard is an 
13

annual average standard; thus the PM2.5 attainment demonstration for the South Coast 

was based on the corresponding annual average emission reductions. Since the 

emission reductions in this document and the emission reductions found in the PM2.5 

attainment demonstration are based on different seasonal inventories, the specific 

emission reduction numbers may differ. 

Air quality modeling indicates that the combined emission reductions committed to by 

the ARB and the South Coast and San Joaquin Valley air districts will result in 

attainment of the federal 8-hour ozone standard by 2023 in each of these areas, and for 

federal PM2.5 standard in the South Coast by the 2014 deadline. The total emission 

reductions from the new measures necessary to attain the federal standards are an 

enforceable State commitment in the SIP. While the State Strategy includes estimates 

of the emission reductions from each of the individual new measures, it is important to 

note that the commitment of the State Strategy is to achieve the aggregate emission 

reductions identified from the existing strategy and the adopted State Strategy. 

Therefore, if a particular measure does not get its expected emission reductions, the 

State still commits to achieving the total aggregate emission reductions, whether this is 

realized through additional reductions from the new measures, or from alternative 

control measures or incentive programs. If actual emission decreases occur that 

exceed the projections reflected in the emission inventories and the State Strategy, the 

actual emission decreases may be counted toward meeting ARB’s total emission 

reduction commitments.
14

Expected Emission Reductions from Proposed New SIP Measures 

(tons per day) 

 

South Coast and San Joaquin Valley -- 2023 

South Coast San Joaquin 

Valley 

Proposed New SIP Measures NOx ROG NOx ROG

Passenger Vehicles 7.1 10.5 2.1 3.3 

 Smog Check Improvements (BAR)* 6.9 7.5 2.1 1.9 

 Expanded Vehicle Retirement 0.2 0.5 0.04 0.1 

 Modifications to Reformulated Gasoline Program* -- 2.5 -- 1.3 

Heavy-Duty Trucks 25.3 1.7 21.2 2.3 

 Cleaner In-Use Heavy-Duty Trucks* 25.3 1.7 21.2 2.3 

Goods Movement Sources 92.2 1.9 16.4 1.3 

 Ship Auxiliary Engine Cold Ironing & Clean Technology* 30.8 -- -- -- 

 Cleaner Main Ship Engines and Fuel* 39.9 -- -- --

 Port Truck Modernization (in Heavy-Duty Trucks)* -- -- -- -- 

 Accelerated Intro. of Cleaner Line-Haul Locomotives* 15.6 1.9 16.4 1.3 

 Clean Up Existing Harbor Craft* 5.9 NYQ -- NYQ

Off-Road Equipment 13.9 1.9 5.4 0.6 

 Cleaner In-Use Off-Road Equipment (over 25hp)* 13.9 1.9 5.4 0.6 

 Cleaner In-Use Agricultural Equipment NYQ NYQ NYQ NYQ

Other Off-Road Sources 2.4 24.0 0.6 11.4 

 New Emission Standards for Recreational Boats 2.4 17.6 0.6 5.3 

 Expanded Off-Road Rec. Vehicle Emission Standards -- 6.4 -- 6.1 

 Additional Evaporative Emission Standards* -- NYQ -- NYQ

 Vapor Recovery for Above Ground Storage Tanks* -- NYQ -- NYQ

Areawide Sources -- 13.7 -- 6.3 

 Consumer Products Program* -- 13.7 -- 3.8 

 Pesticides: DPR Regulation -- NYQ -- 2.5 

Greenhouse Gas Reduction NYQ NYQ -- -- 

Co-Benefits from Greenhouse Gas Reduction Measures NYQ NYQ -- -- 

Emission Reductions from Proposed New Measures 141 54 46 25 

 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. DPR = Dept. of Pesticide Regulation. 

Locomotives measure relies on U.S. EPA rulemaking and industry agreement to accelerate fleet turnover.

Note: Emission reductions reflect the combined impact of regulations and supportive incentive programs. 

Emission reduction estimates for each proposed measure are shown for informational purposes only. Actual 

emission reductions from any particular measure may be greater than or less than the amounts shown. 

* Adopted in part or in full 
15

Expected Emission Reductions from Proposed New SIP Measures 

(tons per day) 

 

South Coast and San Joaquin Valley -- 2020 

South Coast San Joaquin 

Valley 

Proposed New SIP Measures NOx ROG NOx ROG

Passenger Vehicles 9.6 12.9 2.7 4.1 

 Smog Check Improvements (BAR)* 8.3 8.7 2.4 2.2 

 Expanded Vehicle Retirement 1.3 1.2 0.3 0.3 

 Modifications to Reformulated Gasoline Program* -- 3.0 -- 1.6 

Heavy-Duty Trucks 34.9 2.6 30.2 3.3 

 Cleaner In-Use Heavy-Duty Trucks* 34.9 2.6 30.2 3.3 

Goods Movement Sources 79.1 1.8 15.6 1.2 

 Ship Auxiliary Engine Cold Ironing & Clean Technology* 28.3 -- -- -- 

 Cleaner Main Ship Engines and Fuel* 32.3 -- -- --

 Port Truck Modernization (in Heavy-Duty Trucks)* -- -- -- -- 

 Accelerated Intro. of Cleaner Line-Haul Locomotives* 13.4 1.8 15.6 1.2 

 Clean Up Existing Harbor Craft* 5.1 NYQ -- NYQ

Off-Road Equipment 18.7 2.9 7.0 1.0 

 Cleaner In-Use Off-Road Equipment (over 25hp)* 18.7 2.9 7.0 1.0 

 Cleaner In-Use Agricultural Equipment NYQ NYQ NYQ NYQ

Other Off-Road Sources 1.6 17.9 0.4 8.7 

 New Emission Standards for Recreational Boats 1.6 12.8 0.4 3.8 

 Expanded Off-Road Rec. Vehicle Emission Standards -- 5.1 -- 4.9 

 Additional Evaporative Emission Standards* -- NYQ -- NYQ

 Vapor Recovery for Above Ground Storage Tanks* -- NYQ -- NYQ

Areawide Sources -- 13.5 -- 6.1 

 Consumer Products Program* -- 13.5 -- 3.6 

 Pesticides: DPR Regulation -- NYQ -- 2.5 

Greenhouse Gas Reduction NYQ NYQ -- -- 

Co-Benefits from Greenhouse Gas Reduction Measures NYQ NYQ -- -- 

Emission Reductions from Proposed New Measures 144 52 56 24 

 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. DPR = Dept. of Pesticide Regulation. 

Locomotives measure relies on U.S. EPA rulemaking and industry agreement to accelerate fleet turnover.

Note: Emission reductions reflect the combined impact of regulations and supportive incentive programs. 

Emission reduction estimates for each proposed measure are shown for informational purposes only. Actual 

emission reductions from any particular measure may be greater than or less than the amounts shown. 

* Adopted in part or in full 
16

Expected Emission Reductions from Proposed New SIP Measures 

(tons per day) 

 

San Joaquin Valley -- 2017 

 

Proposed New SIP Measures NOx ROG 

Passenger Vehicles 3.3 5.4 

 Smog Check Improvements (BAR)* 2.9 2.6 

 Expanded Vehicle Retirement 0.4 0.5 

 Modifications to Reformulated Gasoline Program* -- 2.3 

Heavy-Duty Trucks 62.4 6.2 

 Expanded Cleaner In-Use Heavy-Duty Trucks* 62.4 6.2 

Goods Movement Sources 11.4 0.9 

 Ship Auxiliary Engine Cold Ironing & Clean Technology* -- -- 

 Cleaner Main Ship Engines and Fuel* -- -- 

 Port Truck Modernization (in Heavy-Duty Trucks)* -- -- 

 Accelerated Intro. of Cleaner Line-Haul Locomotives* 11.4 0.9 

 Clean Up Existing Harbor Craft* -- NYQ 

Off-Road Equipment 10.4-15.4 1.6-2.3 

 Cleaner In-Use Off-Road Equipment (over 25hp)* 5.4 1.0 

 Cleaner In-Use Agricultural Equipment 5-10 0.6-1.3 

Other Off-Road Sources 0.3 6.2 

 New Emission Standards for Recreational Boats 0.3 2.6 

 Expanded Off-Road Rec. Vehicle Emission Standards -- 3.6 

 Additional Evaporative Emission Standards -- NYQ 

 Vapor Recovery for Above Ground Storage Tanks* -- NYQ 

Areawide Sources -- 5.9 

 Consumer Products Program* -- 3.4 

 Pesticides: DPR Regulation -- 2.5 

Emission Reductions from Proposed New Measures 88-93 26-27 

 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. DPR = Dept. of Pesticide Regulation. 

Locomotives measure relies on U.S. EPA rulemaking and industry agreement to accelerate fleet turnover.

Note: Emission reductions reflect the combined impact of regulations and supportive incentive programs. 

Emission reduction estimates for each proposed measure are shown for informational purposes only. Actual 

emission reductions from any particular measure may be greater than or less than the amounts shown. 

* Adopted either in part or in full 
17

Expected Emission Reductions from Proposed New SIP Measures 

(tons per day) 

 

South Coast -- 2014 

 

Direct Proposed New SIP Measures NOx ROG

PM2.5

SOx 

Passenger Vehicles 14.4 17.7 0.3 -- 

 Smog Check Improvements (BAR)* 12.0 10.5 0.2 -- 

 Expanded Vehicle Retirement 2.4 2.8 0.05 -- 

 Modifications to Reformulated Gasoline Program* -- 4.4 -- -- 

Heavy-Duty Trucks 76.3 5.1 3.0 -- 

 Cleaner In-Use Heavy-Duty Trucks* 76.3 5.1 3.0 --

Goods Movement Sources 47.4 0.7 3.1 20.1 

 Ship Auxiliary Engine Cold Ironing & Clean Technology* 18.5 -- 0.3 0.4 

 Cleaner Main Ship Engines and Fuel* 20.0 -- 2.4 19.7 

 Port Truck Modernization (in Heavy-Duty Trucks)* -- -- -- -- 

 Accelerated Intro. of Cleaner Line-Haul Locomotives* 4.3 0.7 0.2 -- 

 Clean Up Existing Harbor Craft* 4.6 -- 0.2 -- 

Off-Road Equipment 10.5 2.7 2.6 -- 

 Cleaner In-Use Off-Road Equipment (over 25hp)* 10.5 2.7 2.6 -- 

 Cleaner In-Use Agricultural Equipment NYQ NYQ NYQ -- 

Other Off-Road Sources 0.4 6.6 -- -- 

 New Emission Standards for Recreational Boats 0.4 4.2 -- -- 

 Expanded Off-Road Rec. Vehicle Emission Standards -- 2.4 -- -- 

 Additional Evaporative Emission Standards -- NYQ -- NYQ

 Vapor Recovery for Above Ground Storage Tanks* -- NYQ -- NYQ

Areawide Sources -- 12.9 -- -- 

 Consumer Products Program* -- 12.9 -- -- 

 Pesticides: DPR Regulation -- NYQ -- -- 

Greenhouse Gas Reduction 3.0 NYQ NYQ NYQ

Co-Benefits from Greenhouse Gas Reduction Measures 3.0 NYQ NYQ NYQ

Emission Reductions from Proposed New Measures 152 46 9 20 

 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. DPR = Dept. of Pesticide Regulation. 

Locomotives measure relies on U.S. EPA rulemaking and industry agreement to accelerate fleet turnover.

Note: Emission reductions reflect the combined impact of regulations and supportive incentive programs. 

Emission reduction estimates for each proposed measure are shown for informational purposes only. Actual 

emission reductions from any particular measure may be greater than or less than the amounts shown. 

* Adopted either in part or in full 
18

Expected Emission Reductions from Proposed New SIP Measures 

(tons per day) 

 

San Joaquin Valley -- 2014 

 

Direct Proposed New SIP Measures NOx ROG

PM2.5

SOx 

Passenger Vehicles 3.8 6.5 0.1 -- 

 Smog Check Improvements (BAR)* 3.3 2.9 0.05 -- 

 Expanded Vehicle Retirement 0.5 0.7 0.01 -- 

 Modifications to Reformulated Gasoline Program* -- 2.9 -- -- 

Heavy-Duty Trucks 61.4 6.4 3.6 -- 

 Cleaner In-Use Heavy-Duty Trucks* 61.4 6.4 3.6 --

Goods Movement Sources 7.2 0.5 0.2 -- 

 Ship Auxiliary Engine Cold Ironing & Clean Technology* -- -- -- -- 

 Cleaner Main Ship Engines and Fuel* -- -- -- -- 

 Port Truck Modernization (in Heavy-Duty Trucks)* -- -- -- -- 

 Accelerated Intro. of Cleaner Line-Haul Locomotives* 7.2 0.5 0.2 -- 

 Clean Up Existing Harbor Craft* -- NYQ -- -- 

Off-Road Equipment 3.7 0.9 0.8 -- 

 Cleaner In-Use Off-Road Equipment (over 25hp)* 3.7 0.9 0.8 -- 

 Cleaner In-Use Agricultural Equipment NYQ NYQ NYQ -- 

Other Off-Road Sources 0.1 3.5 -- -- 

 New Emission Standards for Recreational Boats 0.1 1.3 -- -- 

 Expanded Off-Road Rec. Vehicle Emission Standards -- 2.2 -- -- 

 Additional Evaporative Emission Standards -- NYQ -- NYQ

 Vapor Recovery for Above Ground Storage Tanks* -- NYQ -- NYQ

Areawide Sources -- 5.7 -- -- 

 Consumer Products Program* -- 3.2 -- -- 

 Pesticides: DPR Regulation -- 2.5 -- -- 

Emission Reductions from Proposed New Measures 76 23 5 0 

 

NYQ = Not Yet Quantified. BAR = Bureau of Automotive Repair. DPR = Dept. of Pesticide Regulation. 

Locomotives measure relies on U.S. EPA rulemaking and industry agreement to accelerate fleet turnover.

Note: Emission reductions reflect the combined impact of regulations and supportive incentive programs. 

Emission reduction estimates for each proposed measure are shown for informational purposes only. Actual 

emission reductions from any particular measure may be greater than or less than the amounts shown. 

* Adopted either in part or in full 
19

Expected Emission NOx and ROG Reductions from Proposed 

New SIP Measures 

(tons per day) 

 

Sacramento Metro Area -- 2018 

 

Proposed New SIP Measures NOx ROG 

Passenger Vehicles 1.7 2.6 

 Smog Check Improvements (BAR) * 1.4 1.3 

 Expanded Vehicle Retirement 0.3 0.2 

 Modifications to Reformulated Gasoline Program* -- 1.1 

Heavy-Duty Trucks 9.5 0.8 

 Cleaner In-Use Heavy-Duty Trucks* 9.5 0.8 

Goods Movement Sources 0.2 0.0 

 Clean Up Existing Harbor Craft* 0.2 0.0 

Off-Road Equipment 1.9 0.4 

 Cleaner In-Use Off-Road Equipment (over 25hp) * 1.9 0.4 

Other Off-Road Sources 0.3 6.1 

 New Emission Standards for Recreational Boats 0.3 3.0 

 Expanded Off-Road Rec. Vehicle Emission Standards 0.0 2.7 

 Additional Evaporative Emission Standards* -- 0.4

Areawide Sources -- 1.9 

 Consumer Products Program* -- 1.9 

Emission Reductions from Proposed New 

Measures 13 11 

 

BAR = Bureau of Automotive Repair 

 Includes motor vehicle inventory from SACOG FEB 2008 submittal 
20

Commitment to Reduce Emissions 

The tables below describe the emission reduction commitment proposal for Board 

approval. ARB staff proposes to commit to achieve the emission reductions set forth in 

these tables, by the dates indicated in the table entitled, “Schedule for Board 

Consideration of Proposed ARB Rulemaking” that occurs later in this document. The 

reductions may be achieved through a combination of actions, including regulations, 

incentives, and other enforceable mechanisms. 

South Coast 

Summary of Emission Reduction Commitments (tons per day) – South Coast 

Year NOx ROG Direct PM2.5 SOx 

Commitment Achieved Commitment Achieved Commitment Achieved Commitment Achieved 

2014 152 101 46 18 9 9 20 17 

2020 1 144 85 52 14 -- -- -- -- 

2023 2 141 80 54 11 -- -- -- -- 

2023 

CAA 

182(e)(5) 

Measures

241 2 -- 40 2 -- -- -- -- -- 

1 The 2020 commitment in the South Coast is necessary to provide for attainment in the downwind nonattainment areas.

2 The reductions of NOx and ROG from 182(e)(5) measures will be reassessed as new SIPs are developed and revised. 

Commitments to Secure Additional Emission Reductions to Help Meet the South 

Coast District’s PM2.5 Emission Reduction Target 

ARB commits to working with the South Coast Air Quality Management District (District) 

to secure funding for the District to achieve 6 tpd of NOx emission reductions from portrelated and other sources and from Metrolink trains, and to backstop the District’s 6 tpd 

emission reduction commitment. “Backstop” means that ARB commits to secure some 

or all of the 6 tpd of the District’s emission reduction commitment if the District fails to 

achieve the emission reductions. 

ARB’s emission reduction commitments may be achieved through a combination of 

actions including but not limited to the implementation of control measures; the 

expenditure of local, State or federal incentive funds; or through other enforceable 

measures. In addition, ARB may meet its emission reduction commitments by securing 

ROG, SOx, or direct PM2.5 emission reductions instead of NOx reductions, if these 

reductions achieve the equivalent air quality benefit. In determining equivalency, the 

State will rely on the information on air quality modeling documented in the South Coast 

District’s SIP. 
21

Finally, if actual emission decreases occur in the South Coast Air Basin that are greater 

than the projected emissions reductions from the adopted measures in the State 

Strategy, the actual emission decreases may be counted toward meeting ARB’s total 

emission reduction commitments. 

If U.S. EPA makes a finding under section 179(c)(1) of the Clean Air Act that the South 

Coast Air Basin has attained the Annual Average PM2.5 National Ambient Air Quality 

Standard before the entire commitment has been achieved, ARB commits to achieving 

the remaining emission reductions, but they may be achieved after 2014 but no later 

than 2017.

San Joaquin Valley 

Summary of Emission Reduction Commitments (tpd) – San Joaquin Valley 

Year NOx ROG Direct PM2.5 SOx 

Commitment Achieved Commitment Achieved Commitment Achieved Commitment Achieved 

2014 76 69 23 11 5 5 -- -- 

2017 88-93 54 -- -- -- -- -- -- 

2020 56 36 24 7 -- -- -- -- 

2023 46 28 25 6 -- -- -- -- 

2023 

CAA 

182(e)(5) 

Measures

81 1 -- --

 1

 -- -- -- -- -- 

1 The reductions of NOx and ROG from 182(e)(5) measures will be reassessed as new SIPs are developed and

revised.

Coachella Valley 

Summary of Emission Reduction Commitments (tpd) – Coachella Valley 

Year NOx ROG 

 Commitment Achieved Commitment Achieved

2018 7 NYQ 2 NYQ 
22

Sacramento 

Summary of Emission Reduction Commitments (tpd) – Sacramento Metro Area 

Year NOx ROG 

 Commitment Achieved Commitment Achieved

2018 13 12 11 3 

Commitment to Propose Defined New SIP Measures

In addition to the commitment to reduce emissions by 2014, 2018, 2020 and 2023, ARB 

staff also proposes to commit to submit to the Board and propose for adoption the list of 

proposed new ARB control measures shown in the table below. The Board shall take 

action on or before the dates set forth in the following table. Such action by the Board 

may include any action within its discretion. 

Schedule for Board Consideration of Proposed ARB Rulemaking 

Proposed New SIP Measures Year 

Cleaner In-Use Off-Road Equipment* 

Modifications to Reformulated Gasoline Program* 

Cleaner Main Ship Fuel* 

Clean Up Existing Harbor Craft* 

Enhanced Vapor Recovery for Above Ground Storage Tanks* 

2007 

Cleaner In-Use Heavy-Duty Trucks* 

Port Truck Modernization* 

Ship Auxiliary Engines* 

Cleaner Line-Haul Locomotives (Enforceable Agreement)* 

Consumer Products Program I* 

2008 

Cleaner In-Use Agricultural Equipment 

New Emission Standards for Recreational Boats 

Expanded Off-Road Recreational Vehicle Emission Standards 

Additional Evaporative Emission Standards* 

2009-2010 

Consumer Products Program II 2010-2012 

* Adopted either in part or in full 
23

State Strategy 

Proposed New SIP Measures 

Implementing Agency – Expected Action – Expected Implementation 

Proposed New SIP Measures Implementing

Agency 

Expected 

Action 

Expected 

Implementation 

Passenger Vehicles 

 Smog Check Improvements* BAR 2007-2008 By 2010 

 Expanded Vehicle Retirement ARB/BAR 2008-2014 2008-2014 

 Modifications to Reformulated Gasoline 

Program* ARB 2007 Phase-in 

starting 2010 

Trucks 

 Cleaner In-Use Heavy-Duty Trucks* ARB 2008 2010-2015 

Goods Movement Sources 

 Auxiliary Ship Engine Cold Ironing and 

Other Clean Technology* 

EPA/ARB/ 

Local 2007-2008 Phase-in starting 2010 

Fuel: 2007 2007-2010 

 Cleaner Main Ship Engines and Fuel* EPA/ARB 

Local Engines: 

2009 

Phase-in 

starting 2010 

 Port Truck Modernization* ARB/Local 2007-2008 2008-2020 

 Accelerated Introduction of Cleaner 

Line-Haul Locomotives* EPA/ARB 2007-2008 Starting in 2012 

 Clean Up Existing Harbor Craft* ARB 2007 2009-2018 

Off-Road Equipment 

 Cleaner In-Use Off-Road Equipment* ARB 2007 Phase-in 

starting 2008 

 Cleaner In-Use Agricultural Equipment ARB 2009 Phase-in 

starting 2014 

Other Off-Road Sources 

 New Emission Standards for 

Recreational Boats ARB 2009-2010 2012-2013 

 Expanded Off-Road Recreational 

Vehicle Emission Standards ARB By 2010 2012-2015 

 Enhanced Vapor Recovery for Above 

Ground Storage Tanks* ARB 2007 Phase-in 

starting 2008 

 Additional Evaporative Emission 

Standards* ARB By 2010 2010-2012 

AREAWIDE SOURCES 

2007-2008 By 2010 Consumer Products Program* ARB 2010-2012 By 2012-2014 

 DPR Pesticide Regulation* DPR 2008 2008 

DPR = Department of Pesticide Regulation. BAR = Bureau of Automotive Repair 

* Adopted either in part or in full 
24

Commitments for Remaining New SIP Measures 

ARB staff commits to report to the Board annually on progress in developing, adopting, 

and implementing the near-term and long-term measures in the State Strategy for 

California's 2007 State Implementation Plan. 

 

ARB commits to revise the 2007 SIP as may be appropriate in a 2010 Mid-course 

Review SIP update to: 

(a) reflect the emission benefits of newly adopted regulations; 

(b) to provide more detail on the State's intended actions to fulfill the commitment to 

achieve emission reductions in total by specific dates; 

(c) to update as necessary the emissions inventories, including the on-road mobile 

source emissions inventory and motor vehicle activity levels for federal ozone 

and PM2.5 nonattainment areas; and 

(d) to revise as necessary other plan aspects, including motor vehicle emissions 

budgets. 

ARB commits to develop and adopt any necessary and appropriate update and submit it 

to U.S. EPA as a SIP revision by June 30, 2010. 
25

Commitment to Reduce Emissions via Long-Term Strategy

Consistent with section 182(e)(5) of the federal Clean Air Act, this SIP includes 

long-term commitments to achieve the last increment of emission reductions necessary 

to meet attainment goals in the South Coast and San Joaquin Valley. As the State 

agency charged with ensuring California’s SIP compliance, ARB is ultimately 

responsible for ensuring the necessary measures are identified no later than 2020 

(three years prior to the attainment year) and the emission reductions achieved by 

2023. 

After adoption of the State Strategy, ARB staff proposes to initiate a coordinated 

government, private, and public effort to establish emission goals for critical mobile and 

stationary emission source categories. Following the setting of emission goals, ARB will 

start an ongoing public process to assess technology advancement opportunities for the 

critical categories. ARB staff will periodically brief the Board at public meetings on 

emerging emission reduction opportunities, promising technologies, and the progress 

made in developing long-term emission reduction measures. As ARB staff identifies 

feasible technology-forcing emission reduction measures, staff will propose those 

measures to the Board for inclusion into the SIP. 

U.S. EPA, along with ARB, the South Coast and San Joaquin Valley Air Districts and 

the California Environmental Protection Agency, signed a memorandum of 

agreement (MOA) to commit to developing and testing new sustainable technologies to 

accelerate progress in meeting current and future national air quality standards. 

The goal of the MOA is to improve air quality by aligning agency research resources, 

where possible and appropriate, to evaluate innovative technologies that have the 

potential to reduce emissions of pollutants and pollutant precursors, and to develop and 

assess new monitoring equipment that could improve the measurement of emissions 

from mobile and stationary sources of pollution. 

As part of this agreement, the agencies intend to coordinate research efforts with other 

public and private stakeholders, including other federal departments and agencies and 

other state and local entities, in order to utilize the resources and capacities of a wide 

sector of government and the business community in projects to develop, demonstrate 

and assess new technologies that can help achieve clean air goals. 

To implement the agreement, each agency may appoint a liaison to serve as an 

ongoing point of contact and to, among other things, coordinate the objectives of the 

MOA and pursue necessary resources. The agencies also agreed to establish a Clean 

Air Technology Working Group, to administer the MOA. Projects and activities may 

include: 

• Creation of a Research Coordination Council to review current information 

and explore opportunities to develop and deploy new technologies; 
26

• Exchange of information on research and development program plans and 

projects and new technologies; 

• Collaborative planning and execution of research and development programs; 

• Participation of scientists, engineers, analysts and other specialists from each 

agency in agreed upon activities; 

• Organization of seminars and other meetings; 

• Joint projects; and 

• Dissemination of information to stakeholders on potential applications of new 

technologies. 

No later than 2020, ARB and the two air districts will prepare a revision to the 8-hour 

Ozone SIP that (1) reflects any modifications to the 2023 emission reduction target 

based on updated science, and (2) identifies any additional strategies, including the 

implementing agencies, needed to achieve the necessary emissions reductions by 

2023. In accordance with section 182(e)(5)(B) of the Clean Air Act, ARB will submit 

enforceable commitments to develop and adopt contingency measures if the advanced 

technology measures do not achieve planned reductions. 

South Coast: After accounting for the anticipated benefits of both adopted and new 

defined State and local measures, the State Strategy demonstrates a need for another 

281 tpd ROG and NOx reductions from long-term measures. This represents 24 

percent of the total reductions needed by 2023. We believe that this gap can be 

bridged through a cooperative effort by the local, State and federal agencies 

responsible for specific emission sources. This effort should focus on how to most 

effectively achieve the additional reductions, considering the availability and cost of 

potential controls. 

San Joaquin Valley: After accounting for the anticipated benefits of both adopted and 

new defined State and local measures, the State Strategy demonstrates a need for 

another 81 tpd NOx reductions from long-term measures. This represents 13 percent of 

the total NOx and ROG reductions needed by 2023. We believe that this gap can be 

bridged through a cooperative effort by the local, State and federal agencies 

responsible for specific emission sources. This effort should focus on how to most 

effectively achieve the additional reductions, considering the availability and cost of 

potential controls. 

To implement the Long-term Strategy, ARB: 

a) commits to share the results of its efforts and others to identify emerging 

emission reduction opportunities, promising technologies, and the progress made 

in developing long-term emission reduction measures with the public through 
27

periodic briefings to the Board, workshops, conferences, symposia, website 

postings, and other means; 

b) commits to work to secure resources in the future for continuing research and 

development of new technologies; and 

c) commits to develop schedules for moving from control technology research to 

implementation. 

Withdrawal of Chapter 4

Chapter 4 was included in ARB’s submission for historical purposes. It does not reflect 

the final decisions made regarding the South Coast air district’s attainment 

demonstration approved by ARB. Chapter 4 is withdrawn.