REDESIGNATION REQUEST

AND MAINTENANCE PLAN

FOR THE 1997 NATIONAL OZONE STANDARD

FOR SAN DIEGO COUNTY

(Adopted December 5, 2012; Effective upon EPA approval)

SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

10124 OLD GROVE ROAD

SAN DIEGO, CA 92131
OZONE REDESIGNATION REQUEST AND 

MAINTENANCE PLAN FOR SAN DIEGO COUNTY

TABLE OF CONTENTS

PAGE

1.0 INTRODUCTION ............................................................................................................................ 1-1

1.1 Background .................................................................................................................................. 1-1

FIGURE 1-1 Proposed Attainment Area Boundaries............................................................... 1-5

1.2 Redesignation Criteria.................................................................................................................. 1-5

1.3 EPA Policy Guidance................................................................................................................... 1-6

2.0 ATTAINMENT OF THE 1997 NATIONAL OZONE STANDARD........................................... 2-1

2.1 Monitoring Network .................................................................................................................... 2-1

FIGURE 2-1 Ozone Monitors Operated During the Three-Year Attainment Period

2009 - 2011......................................................................................................... 2-2

2.2 Methodology ................................................................................................................................ 2-2

2.3 Attainment Demonstration........................................................................................................... 2-3

TABLE 2-1 Annual Fourth High Daily Maximum 8-Hour Ozone Concentrations and Ozone

Design Value 2009 - 2011.................................................................................. 2-4

3.0 CLEAN AIR ACT COMPLIANCE................................................................................................ 3-1

3.1 Compliance with Clean Air Act Section 110 and Part D............................................................. 3-1

3.2 Fully-Approved SIP Pursuant to Clean Air Act Section 110(k) .................................................. 3-2

4.0 ATTAINMENT DUE TO PERMANENT, ENFORCEABLE EMISSIONS 

REDUCTIONS ................................................................................................................................ 4-1

4.1 Permanent, Enforceable Emissions Reductions.................................................................... 4-1

TABLE 4-1 2002-2011 Reductions in Ozone Precursor Emissions....................................... 4-2

4.2 Emission Reductions Not Temporary .......................................................................................... 4-3

FIGURE 4-1 VOC+NOx Emission Reductions Despite Growth ............................................ 4-3

4.3 Meteorology Not Unusually Favorable........................................................................................ 4-3

TABLE 4-2 Three-Year Average Ozone Season Daily Maximum Temperatures................. 4-5

5.0 MAINTENANCE PLAN.................................................................................................................. 5-1

5.1 Attainment Inventory ................................................................................................................... 5-1

TABLE 5-1 San Diego County 2011 Ozone Attainment Inventory....................................... 5-1

5.2 Maintenance Demonstration ........................................................................................................ 5-1

TABLE 5-2 Ozone Maintenance Demonstration 2011 - 2025 Maintenance Period 

Projected Inventory of Ozone Precursors........................................................... 5-3

5.3 Transportation Conformity Emissions Budgets .......................................................................... 5-3

TABLE 5-3 On-Road Motor Vehicle Emissions Budgets Ozone Maintenance Period ......... 5-4

5.4 Maintenance Strategy................................................................................................................... 5-4

5.5 Continued Monitoring.................................................................................................................. 5-5

5.6 Verification of Maintenance ........................................................................................................ 5-5

5.7 Contingency Plan ......................................................................................................................... 5-5

5.8 Subsequent Plan Revisions .......................................................................................................... 5-6

APPENDIX A Projected Emissions Inventories.............................................................................. A-1

APPENDIX B District, State and Federal Emission Control Programs............................................B-1
1.0 Introduction

Ozone Redesignation Request and Maintenance Plan Page 1-1

1.0 INTRODUCTION

The San Diego County Air Pollution Control District (District) is hereby requesting that the 

California Air Resources Board (ARB) petition the U.S. Environmental Protection Agency (EPA) 

to redesignate the San Diego County ozone nonattainment area to attainment of the ozone National 

Ambient Air Quality Standard (NAAQS or standard), promulgated in 1997. This request meets the 

statutory criteria for redesignation under the Clean Air Act (CAA),

1 as demonstrated herein. 

Ozone monitoring data for the period of 2009-2011 show that San Diego County has attained the 

1997 ozone NAAQS. Available preliminary monitoring data for 2012 show the area to continue to 

be in attainment of the standard. Attainment is a significant air quality and public health 

achievement resulting from a long-standing, comprehensive regulatory program to control air 

pollutant emissions. The resulting long-term and continuing downtrend in peak ozone levels and in 

the annual number of exceedances of the 1997 ozone NAAQS—despite substantial growth in 

population and motor vehicles over the same period—clearly shows that emission control measures 

are working. 

Attainment is also an indicator of the region’s progress toward meeting the more health-protective 

2008 ozone NAAQS. Attaining the more-stringent standard will require additional emission 

reductions. Nevertheless, the region's substantial progress to date toward meeting this standard

further demonstrates that emission control measures are working. 

Notwithstanding compliance with the 1997 ozone NAAQS, San Diego County will remain 

designated a nonattainment area for this standard until a redesignation request and supporting 

documentation are adopted by the Air Pollution Control Board and submitted to ARB, ARB 

forwards the request to EPA, and EPA finds that the CAA criteria for redesignation have been met 

and grants the request. Redesignation primarily requires demonstrating that all CAA requirements 

applicable to the nonattainment area have been met, and receiving EPA approval of a maintenance 

plan demonstrating how the region will maintain compliance with the standard in future years.

The District has reviewed the statutory criteria and EPA policy guidance addressing redesignation, 

and concludes redesignation to attainment is warranted. Accordingly, the District hereby requests 

redesignation to attainment of the 1997 ozone NAAQS. The applicable criteria and the justification 

for redesignation are provided herein.

1.1 BACKGROUND

1.1.1 National Ambient Air Quality Standards for Ozone

The CAA requires EPA to set NAAQS for pollutants such as ozone that are considered harmful to 

public health and the environment. The law also requires EPA to periodically review the standards

and their scientific basis to determine whether revisions are appropriate. Accordingly, EPA has 

 

1 The Clean Air Act is codified, as amended, in the US Code at 42 USC Sections 7401, et seq.
1.0 Introduction

Ozone Redesignation Request and Maintenance Plan Page 1-2

periodically established new, more health-protective standards for ozone following advances in the

scientific understanding of the pollutant and its potential health and welfare effects.

1-Hour Standard. A 1-hour ozone NAAQS was established in 1979 at a level of 0.12 parts per 

million (ppm).

2 The 1-hour averaging time was selected on the basis of health effects associated 

with short-term exposure periods. The standard was attained in San Diego County in 2001, and 

subsequently revoked by EPA in 2005 following implementation of a more health-protective 8-hour 

ozone standard established in 1997.

1997 8-Hour Standard. An 8-hour ozone NAAQS (the subject of this Redesignation Request and 

Maintenance Plan) was established in 1997 at a level of 0.08 ppm.3 The 8-hour averaging time was 

selected to address the impacts of exposure to longer periods of elevated ozone pollution. The 

standard is attained when, at each monitor in the region, the three-year average of the annual fourthhighest daily maximum 8-hour average ozone concentrations is no more than 0.084 ppm (based on 

the rounding convention dictated in federal regulation).4 Three years of ozone concentrations are 

averaged due to the impacts of year-to-year variations in meteorology on ozone formation.

2008 8-Hour Standard. A more health-protective 8-hour ozone NAAQS was established in 2008 at 

a level of 0.075 ppm.

5 The 2008 standard is independent of the 1997 standard, which currently 

remains in effect while EPA undertakes rulemaking to address implementation of the 2008 

standard.

1.1.2 Emissions Sources

Ozone is not emitted directly by sources, but is formed in the air by reactions of ozone precursor

emissions—volatile organic compounds (VOC) and oxides of nitrogen (NOx)—in the presence of 

sunlight and heat. Accordingly, peak ozone levels occur during the sunnier, warmer times of the 

year, typically April through October.

VOCs are emitted from a variety of sources, including motor vehicles, chemical plants, factories, 

consumer and commercial products, and other industrial sources. VOCs are also emitted by natural 

sources such as vegetation. NOx is emitted primarily from motor vehicles, other mobile sources 

(e.g., trains, ships, and aircraft), power plants, and other sources of fuel combustion. 

 

2 Federal Register, Volume 44, Page 8220 (44 FR 8220); see also Code of Federal Regulations, Title 40, Part 50.9 (40 

CFR 50.9), "National One-Hour Primary and Secondary Ambient Air Quality Standards for Ozone."

3 62 FR 38856; 40 CFR 50.10, "National Eight-Hour Primary and Secondary Ambient Air Quality Standards for 

Ozone."

4 Appendix I to 40 CFR 50, "Interpretation of the Eight-Hour Primary and Secondary National Ambient Air Quality 

Standards for Ozone."

5 73 FR 16436; 40 CFR 50.15, "National Primary and Secondary Ambient Air Quality Standards for Ozone."
1.0 Introduction

Ozone Redesignation Request and Maintenance Plan Page 1-3

1.1.3 Health and Welfare Effects of Ozone

Ozone is a colorless gas with a pungent, irritating odor. Ozone occurs naturally and is beneficial in 

the upper atmosphere (stratospheric ozone), shielding the earth from harmful ultraviolet radiation 

from the sun. However, ground-level (tropospheric) ozone is a highly reactive and harmful air 

pollutant that can damage living tissues and man-made materials upon contact. 

The health effects of ground-level ozone are focused on the respiratory tract. When inhaled, ozone 

can irritate and inflame the lining of the lungs, much like sunburn damage on skin. People with 

respiratory problems are most vulnerable, but even healthy people that are active outdoors can be 

affected when ozone levels are high. Potential health impacts include aggravated asthma, reduced 

lung capacity, and increased susceptibility to respiratory illnesses like pneumonia and bronchitis.

Ground-level ozone can also hurt the economy by affecting crop yield and the durability of 

materials. Ozone interferes with a plant’s ability to produce and store food, compromising its 

growth and reproduction. Additionally, ozone chemically attacks natural rubber and certain 

synthetic polymers, textile fibers and dyes, and, to a lesser extent, paints. Rubber cracks and dyes 

fade after prolonged exposure to ozone.

1.1.4 Ozone Designation and SIP History of San Diego County

San Diego County’s air quality designations, or compliance status, with respect to NAAQS (i.e., 

attainment or nonattainment) are specified in federal regulation.6 Each area of the nation with air 

pollution levels violating a NAAQS must be designated by EPA as a "nonattainment area" for that 

pollutant. Each nonattainment area must submit a "State Implementation Plan" (SIP) outlining the 

combination of local, state, and federal actions and emission control regulations necessary to bring

the area into attainment as expeditiously as practicable. 

Then, even after the nonattainment area attains the air quality standard, it will remain designated a 

nonattainment area unless and until the state submits to EPA a formal request for redesignation to 

attainment. The request must include a "maintenance" plan demonstrating that the area will 

maintain compliance with that NAAQS for at least 10 years after EPA redesignates the area to 

attainment. 

1-Hour Ozone Standard. San Diego County was designated nonattainment for the 1-hour ozone

standard on March 3, 1978.

7 The region attained the 1-hour ozone standard in 2001, based on 1999-

2001 air quality data. The District prepared and ARB submitted to EPA a redesignation request and 

maintenance plan in 2002, and EPA redesignated San Diego County to attainment for the 1-hour 

ozone standard on July 28, 2003.

8 EPA subsequently revoked the 1-hour ozone standard on June 

15, 2005,9 after issuing area designations for the more health-protective 1997 8-hour ozone 

 

6 40 CFR 81.305, “Designation of Areas for Air Quality Planning Purposes – California.”

7 43 FR 8964.

8 68 FR 37976.

9 69 FR 23951.
1.0 Introduction

Ozone Redesignation Request and Maintenance Plan Page 1-4

NAAQS. However, the EPA-approved 1-hour ozone Maintenance Plan remains in effect as the 

applicable ozone SIP until EPA approves a subsequent ozone SIP submittal (i.e., the Maintenance 

Plan herein).

1997 8-Hour Ozone Standard. The region was designated nonattainment for the 1997 8-hour ozone 

NAAQS, effective June 15, 2004, based on ozone air quality measurements over the 2001-2003 

three-year period.10 At that time, EPA did not further "classify" the region as "marginal," 

"moderate," "serious," "severe," or "extreme" nonattainment pursuant to section 181 of the CAA.

Instead, EPA relied on CAA provisions in section 172 that do not require classifications and 

declared San Diego County (and other regions that had attained the former 1-hour ozone NAAQS

but violated the 8-hour standard) to be only "basic" (unclassified) nonattainment areas. Basic areas 

are allowed some flexibility in their air quality attainment plans, whereas classified areas are subject 

to more prescriptive regulatory requirements. In June 2007, the District submitted a SIP revision 

fulfilling the requirements EPA had established for a basic nonattainment area. 

However, EPA did not take action to approve that SIP submittal because, also in June 2007, a court 

ruled that EPA must reconsider its implementation methodology and criteria for foregoing 

nonattainment classifications in affected regions, including San Diego County. In a rulemaking 

responding to the court remand, EPA classified San Diego County as a Moderate ozone 

nonattainment area for the 1997 ozone standard, effective on June 13, 2012.11 According to the 

EPA rulemaking, a SIP submittal addressing Moderate ozone nonattainment area control 

requirements would be due in June 2013. Nevertheless, the District is already implementing even 

more stringent NOx and VOC emission control rules that had been required because the area was

previously classified as a Serious nonattainment area for the former 1-hour ozone standard. Those 

Serious area controls remain in place pursuant to the existing 1-hour ozone Maintenance Plan, and 

are similarly retained in the proposed Maintenance Plan herein for the 1997 8-hour ozone NAAQS. 

The District is now requesting redesignation of San Diego County to attainment of the 1997 ozone 

NAAQS. Because the region attained the standard in 2011, and this request for redesignation to 

attainment is being submitted prior to the June 2013 SIP submittal due date, those Moderate area 

SIP requirements will not apply after EPA redesignates San Diego County to attainment for the 

1997 ozone NAAQS.

12 Instead, the Maintenance Plan included in this SIP submittal will fulfill that 

SIP submittal requirement. 

2008 8-Hour Ozone Standard. EPA designated and classified San Diego County as a Marginal 

ozone nonattainment area for the 2008 ozone standard, effective on July 20, 2012, based on 2009-

2011 ozone data.13 Redesignation to attainment of the 1997 standard, if approved, would not affect 

the region's Marginal nonattainment status for the 2008 standard.

 

10 69 FR 23858.

11 77 FR 28423.

12 "Procedures for Processing Requests to Redesignate Areas to Attainment," John Calcagni, September 4, 1992. 

13 77 FR 34221.
1.0 Introduction

Ozone Redesignation Request and Maintenance Plan Page 1-5

1.1.5 San Diego County Ozone Attainment Area Boundaries

The San Diego County ozone attainment area boundaries are proposed to be contiguous with San 

Diego County (and District) jurisdictional boundaries, as specified in federal regulation.14 San 

Diego County encompasses approximately 4,200 square miles and is bounded on the north by 

Orange and Riverside Counties, on the east by Imperial County, on the west by the Pacific Ocean, 

and on the south by the State of Baja California, Mexico (as illustrated in Figure 1-1). 

FIGURE 1-1

SAN DIEGO COUNTY

PROPOSED ATTAINMENT AREA BOUNDARIES

1.2 REDESIGNATION CRITERIA

Section 107(d)(3)(E) of the CAA identifies the following five criteria that must be met before EPA 

can redesignate an area from nonattainment to attainment. 

 

14 40 CFR 81.164 ("San Diego Intrastate Air Quality Control Region").

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San Diego County

Counties

Unincorporated Areas of San Diego County

Other Incorporated Cities within San Diego County

City of San Diego

Freeways

APCD Jurisdictional Boundary

Project Location Map
1.0 Introduction

Ozone Redesignation Request and Maintenance Plan Page 1-6

1. EPA has determined that the area attained the applicable NAAQS based on ambient air 

quality data.

2. EPA has fully approved the applicable SIP pursuant to section 110(k) of the CAA. Section 

110(k) addresses completeness findings, deadlines for EPA actions, types of EPA actions, 

and sanctions that may be applied to areas failing to meet CAA requirements.

3. The area has met all requirements in section 110 and part D of the CAA. Section 110 

describes general requirements for SIPs, while part D pertains to requirements applicable to 

nonattainment areas.

4. EPA has determined that the area's improved air quality is due to permanent and enforceable 

emissions reductions, including those resulting from the implementation of the applicable 

SIP and federal measures.

5. EPA has fully approved a maintenance plan for the area as meeting the requirements of 

CAA section 175A. Section 175A requires demonstrating that the area will maintain 

compliance with the standard for at least 10 years after redesignation to attainment, and 

specifying contingency measures to be implemented if a violation is monitored at any time 

during the 10-year maintenance period.

1.3 EPA POLICY GUIDANCE 

EPA has provided policy guidance on redesignation requests in the documents identified below. 

San Diego County’s redesignation request and supporting documentation herein have been prepared 

consistent with statutory requirements and the following EPA policy guidance. 

1. "General Preamble for the Implementation of Title I of the Clean Air Act Amendments of 

1990," April 16, 1992 (57 FR 13498), and supplemented on April 28, 1992 (57 FR 18070). 

(General Preamble, 1992)

2. "Procedures for Processing Requests to Redesignate Areas to Attainment," John Calcagni, 

Director, Air Quality Management Division, September 4, 1992. (Calcagni, September 

1992)

3. "Part D New Source Review (part D NSR) Requirements for Areas Requesting 

Redesignation to Attainment," Mary D. Nichols, Assistant Administrator for Air and 

Radiation, October 14, 1994. (Nichols, October 1994)

4. "Regional Consistency for the Administrative Requirements of State Implementation Plan 

Submittals and the Use of Letter Notices," Janet McCabe, Deputy Assistant Administrator, 

Office of Air and Radiation, April 6, 2011. (McCabe, April 2011)
2.0 Attainment of the 1997 Ozone NAAQS

Ozone Redesignation Request and Maintenance Plan Page 2-1

2.0 ATTAINMENT OF THE 1997 NATIONAL OZONE STANDARD

A key criterion for redesignation is that the area has attained the NAAQS based on ambient air 

quality data. A description of the region's ozone monitoring network and a demonstration that San 

Diego County has attained the 1997 ozone NAAQS based on the resulting monitoring data are 

provided below.

2.1 MONITORING NETWORK

The District operates an extensive ozone monitoring network, continuously monitoring ambient 

ozone levels at numerous sites throughout San Diego County15 in compliance with federal 

requirements.16 Whereas EPA regulations require only two ozone monitoring sites in this region, 

San Diego County operated nine ozone monitors during the 2009-2011 attainment period, 

substantially exceeding the requirement. The data generated at these monitors are used to define the 

nature and severity of ozone pollution in San Diego County, identify ozone pollution trends, and 

determine compliance with the ozone NAAQS. 

A map indicating the location of all ozone monitors operated during the three-year attainment 

period (2009-2011) is presented in Figure 2-1. Each monitor remained at the same location for the 

duration of the three-year period, with one minor exception. The Alpine monitoring station needed 

to be moved just 33 meters to the east, on August 18, 2010, due to renovation work at the property

where it was previously located. The relocation was coordinated with EPA to ensure the continued 

adequacy of the monitoring network.

 

15These monitors collectively form San Diego County’s State and Local Air Monitoring Stations (SLAMS) network, 

including National Air Monitoring Stations (NAMS).

16 40 CFR Part 58, "Ambient Air Quality Surveillance."
2.0 Attainment of the 1997 Ozone NAAQS

Ozone Redesignation Request and Maintenance Plan Page 2-2

FIGURE 2-1

OZONE MONITORS IN SAN DIEGO COUNTY

OPERATED DURING THE THREE-YEAR ATTAINMENT PERIOD

2009 THROUGH 2011

Pursuant to federal requirements, the District ensures the quality of the ambient ozone concentration 

data collected at its monitoring sites through analysis of precision and accuracy data. These

ambient concentration data and quality assurance data are submitted to the EPA’s ambient air 

quality database, the Air Quality System (AQS). The District annually certifies the quality of the 

submitted data, as documented in a Certification Letter submitted to EPA. This Certification Letter 

confirms that the data have completed and passed a data validation process in compliance with all 

federal regulations and guidelines. The Certification Letter must include summary reports of the 

ozone concentration data and precision and accuracy statistics for each monitor.

2.2 METHODOLOGY

The method for demonstrating attainment of the 1997 ozone NAAQS is prescribed in federal 

regulation.17 Attainment status must be determined for each monitor and is based on three 

complete, consecutive calendar years of complete, quality-assured, and certified monitoring data 

that have been recorded in EPA's AQS. 

In its simplest form, an attainment demonstration is relatively straightforward. For each monitor, 

the fourth-highest daily maximum 8-hour average ozone concentration in each of the past three 

 

17 40 CFR 50.10 ("National Eight-Hour Primary and Secondary Ambient Air Quality Standards for Ozone"), and 

Appendix I to Part 50 ("Interpretation of the Eight-Hour Primary and Secondary National Ambient Air Quality 

Standards for Ozone").
2.0 Attainment of the 1997 Ozone NAAQS

Ozone Redesignation Request and Maintenance Plan Page 2-3

consecutive years is recorded and then averaged over the three–year period. The highest resulting 

averaged value for all monitors is known as the ozone "design value" for the region. The standard 

is attained when the region's design value is less than or equal to 0.084 ppm. Averaging over a 

three-year period reduces the variable influence of year-to-year meteorology changes and thus 

better represents the air quality trend. 

2.3 ATTAINMENT DEMONSTRATION

San Diego County’s ozone attainment demonstration is summarized in Table 2-1 and is based on 

complete, quality-assured, and certified monitoring data covering the three-year period January 1, 

2009, through December 31, 2011. The data have been recorded in EPA’s AQS database and are 

available for public review. 

San Diego County's current ozone design value (for the period 2009-2011) is 0.082 ppm at the 

Alpine monitoring station, which historically has recorded the highest ozone concentrations in the 

region.

18 Thus, the 1997 ozone NAAQS has been attained throughout the region. To date, based on 

uncertified data for 2012, the region continues to be in attainment. This shows sustained 

improvement in air quality in San Diego County. 

 

18 Ozone levels in Alpine (and in other inland, foothill communities in the region) tend to be higher because of how and 

where ozone is created. Emissions from the denser metropolitan areas and major transportation corridors are blown 

inland by the onshore breeze toward the west-facing mountain slopes. During this transport of pollution, the emissions 

have time to react in the sunlight to form ozone. The ozone then becomes trapped against the mountain slopes and 

below the thermal inversion layer, which often hovers at about 2,000 feet (the same approximate elevation as Alpine).
2.0 Attainment of the 1997 Ozone NAAQS

Ozone Redesignation Request and Maintenance Plan Page 2-4

TABLE 2-1

ANNUAL FOURTH HIGH DAILY MAXIMUM 8-HOUR OZONE CONCENTRATIONS

AND OZONE DESIGN VALUE IN SAN DIEGO COUNTY

2009-2011

(Parts Per Million)

Monitor

Location

(Site ID)

2009 2010 2011 3-Year Average

Alpine

(06-073-1006) 0.085 0.081 0.082 0.08219

Camp Pendleton

(06-073-1008) 0.071 0.064 0.067 0.067

Chula Vista

(06-073-0001) 0.067 0.068 0.055 0.063

Del Mar

(06-073-1001) 0.067 0.063 0.064 0.064

Downtown

(06-073-1010)

0.060 0.058 0.060 0.059

El Cajon

(06-073-0003)

0.071 0.073 0.070 0.071

Escondido

(06-073-1002)

0.074 0.075 0.068 0.072

Kearny Mesa

(06-073-0006)

0.069 0.070 0.069 0.069

Otay Mesa

(06-073-2007)

0.061 0.056 0.059 0.058

Source: EPA's Air Quality System (AQS), February 2012.

 

19 The 8-hour ozone design value for San Diego County is 0.082 ppm, representing the highest three-year average of 

the fourth-highest daily maximum 8-hour average for all monitors in the region.
3.0 Clean Air Act Compliance

Ozone Redesignation Request and Maintenance Plan Page 3-1

3.0 CLEAN AIR ACT COMPLIANCE

For purposes of redesignation, San Diego County must comply with section 110 and part D of the 

CAA, and the applicable SIP must have been fully approved by EPA pursuant to CAA section 

110(k). As specified in the following sections, these requirements will have been fully met by the 

time EPA acts on this redesignation request.

3.1 COMPLIANCE WITH CLEAN AIR ACT SECTION 110 AND PART D

Section 107(d)(3)(E)(v) of the CAA specifies that EPA can redesignate a nonattainment area to 

attainment only if the state containing such area has met all requirements applicable to the area 

under section 110 and part D of the CAA. Section 110 of the CAA identifies general SIP 

provisions, and part D identifies specific requirements for nonattainment area SIPs. Thus, for the 

nonattainment area to be redesignated to attainment for the 1997 ozone standard, all SIP 

requirements related to that standard must be met. 

Because San Diego County was designated nonattainment for the 1997 8-hour ozone standard on 

June 15, 2004, a SIP revision was required to be submitted by June 15, 2007, to demonstrate 

attainment for that standard. Since San Diego County had attained the 1-hour ozone standard prior 

to being designated nonattainment for the 8-hour ozone standard, EPA regulations subjected the 

nonattainment area only to the more general and flexible requirements of section 172 of the CAA, 

and not the more prescriptive requirements of section 182. The District submitted a SIP revision by 

the submittal deadline, which fulfilled the requirements specified in EPA’s implementation rule for 

the 1997 8-hour ozone standard. 

However, on June 8, 2007, a court vacated the portion of EPA’s 8-hour ozone implementation rule 

that subjected the area to section 172 instead of section 182.20 Due to the vacatur, the 2007 SIP 

submittal deadline no longer applied to areas like San Diego County (notwithstanding the District’s 

timely SIP submittal) that were covered by the vacated portions of the 8-hour ozone implementation 

rule. EPA’s rulemaking in response to the court remand, effective on June 13, 2012, classified San 

Diego County as a Moderate ozone nonattainment area for the 1997 ozone standard, and required a 

SIP revision to be submitted by June 13, 2013.21 

Since San Diego County attained the 1997 ozone standard in 2011, and this request for 

redesignation to attainment is being submitted prior to the June 2013 SIP submittal due date, the

Moderate area SIP requirements will not apply after EPA redesignates San Diego County to 

attainment for the 1997 ozone NAAQS.

22 Instead, the Maintenance Plan included in this SIP 

submittal will fulfill that SIP submittal requirement. Thus, the applicable SIP requirements of 

section 110 and part D of the CAA, related to the 1997 ozone NAAQS, will be met by the 

Maintenance Plan herein. 

 

20 "Decision of the U.S. Court of Appeals for the District of Columbia Circuit on our Petition for Rehearing of the 

Phase I Rule to Implement the 8-Hour Ozone NAAQS," Robert J. Meyers, June 15, 2007. 

21 77 FR 28423.

22 "Procedures for Processing Requests to Redesignate Areas to Attainment," John Calcagni, September 4, 1992. 
3.0 Clean Air Act Compliance

Ozone Redesignation Request and Maintenance Plan Page 3-2

3.2 FULLY-APPROVED SIP PURSUANT TO CLEAN AIR ACT SECTION 110(k)

Section 110(k) of the CAA describes EPA’s actions on SIPs, including full approval, disapproval, 

conditional approval, and partial approval/partial disapproval. For a nonattainment area to be 

redesignated to attainment, the applicable SIP must be fully approved. 

EPA fully approved San Diego’s 1-hour ozone Maintenance Plan and redesignated San Diego 

County to attainment for the 1-hour ozone standard on July 28, 2003.23 The EPA-approved 1-hour

ozone Maintenance Plan remains the applicable ozone SIP for San Diego until EPA approves a 

subsequent ozone SIP submittal (i.e., the Maintenance Plan herein). No SIP provisions are 

currently disapproved, conditionally approved, or partially approved. 

 

23 68 FR 37976.
4.0 Attainment Due To Permanent, Enforceable Emissions Reductions

Ozone Redesignation Request and Maintenance Plan Page 4-1

4.0 ATTAINMENT DUE TO PERMANENT, ENFORCEABLE

EMISSIONS REDUCTIONS

To be redesignated, attainment must have resulted from permanent and enforceable emissions 

reductions. According to EPA guidance,

24 "Attainment resulting from temporary reductions in 

emission rates (e.g., reduced production or shutdown due to temporary adverse economic 

conditions) or unusually favorable meteorology would not qualify as an air quality improvement 

due to permanent and enforceable emission reductions."

As demonstrated below, notwithstanding the recent economic downturn,

25 the emission reductions 

that were responsible for San Diego County attaining the 1997 ozone NAAQS were not temporary, 

and the meteorology during the attainment period was not unusually favorable. Rather, attainment 

resulted from the effective combination of District and State measures submitted into the Ozone SIP 

and federal measures that provided permanent and enforceable reductions of VOC and NOx 

emissions. 

4.1 PERMANENT, ENFORCEABLE EMISSIONS REDUCTIONS

EPA policy and longstanding practice allows states to demonstrate permanent and enforceable 

emission reductions by comparing emissions occurring during the nonattainment period 

(represented by emissions during one of the years in the three-year period used to designate an area 

as nonattainment) with emissions occurring during the attainment period (represented by emissions 

during one of the three attainment years). Documentation prepared pursuant to EPA policy 

guidance26 follows, identifying the percent emissions reductions achieved between the 2002 base 

year and the 2011 attainment year from permanent and enforceable emissions control programs. 

Air quality control in California is a shared responsibility among local, State, and federal agencies. 

Local air districts regulate emissions from non-mobile (stationary) sources, such as stationary 

industrial and commercial sources, and some area-wide sources such as coatings and industrial

solvents. At the State level, ARB adopts measures to reduce emissions from on-road motor

vehicles, off-road vehicles and equipment, fuels, and consumer products. At the national level,

EPA regulates off-road equipment and inter-state sources such as ships, trains, aircraft, and out-ofstate vehicles. 

The District—in collaboration with federal, State, and local agencies and the citizens, businesses, 

and civic groups of San Diego County—has worked hard to efficiently and cost-effectively reduce

ozone-precursor emissions from nearly every source to ensure cleaner air for all San Diegans. The 

District and State measures that have been submitted into the Ozone SIP and the federal measures

that control VOC and NOx emissions are listed in Appendix B. 

 

24 Calcagni, September 1992.

25 The recent economic recession began in December 2007 and ended in June 2009 (the last quarter of contracting 

Gross Domestic Product), according to the National Bureau of Economic Research.

26 Calcagni, September 1992.
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As indicated in Table 4-1, emissions reductions between 2002 and 2011 came mostly from EPA and 

ARB mobile source control programs. The District’s stationary source control programs had mostly

already been implemented and provided significant emissions reductions prior to the 2002 base 

year, rather than during the 2002-2011 period. 

The emission reduction percentages presented in Table 4-1 are calculated relative to the 2002 base 

year regionwide emissions totals of 183.1 tons per day of VOC and 198.1 tons per day of NOx. 

Overall, VOC emissions were reduced 22% and NOx emissions were reduced 31% from the 2002 

base year to the 2011 attainment year. About 15% VOC and 25% NOx reductions were from onroad motor vehicles control programs, and 5% VOC and 5% NOx reductions were from non-road 

mobile sources control programs. ARB’s consumer solvent products control program also reduced 

VOC emissions by 3%. 

TABLE 4-1

SAN DIEGO COUNTY

2002-2011 REDUCTIONS IN OZONE PRECURSOR EMISSIONS

(Tons Per Day)

Source Category Jurisdiction VOC 

2002

VOC 

2011

% VOC 

Reduction

NOx 

2002

NOx 

2011

% NOx 

Reduction

Consumer Solvent Products ARB 22.5 17.9 3% -- -- --

On-road Motor Vehicles ARB 63.4 35.3 15% 119.9 70.9 25%

Non-road Mobile Sources ARB & 

EPA 49.1 40.3 5% 68.0 58.6 5%

Stationary & Area Sources District 48.0 49.1 0% 10.1 8.1 1%

TOTAL 183.1 142.6 22% 198.1 137.5 31%

Source: California Air Resources Board, Southern California 2012 SIP Baseline Emission Projection –

Version 1.02 Planning Inventory Tool website.

Notes: Emissions data reflect a "summer day," as required by EPA policy guidance.27

Emissions data assume no emissions reductions from NSR or Title V permit programs.

Source category-specific data are listed in Appendix A to this Ozone Redesignation Request.

Emission reduction percentages are relative to the 2002 base year regionwide emissions totals of 

183.1 tons per day of VOC and 198.1 tons per day of NOx. 

 

27 Calcagni, September 1992.
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4.2 EMISSION REDUCTIONS NOT TEMPORARY

Emission reductions occurring during the recent recession could only be considered temporary, and

to be causing a temporary ozone attainment, if the ensuing economic recovery were to bring 

emissions increases back up to levels that would cause nonattainment in the maintenance period 

(through 2025). However, as illustrated in Figure 4-1, total regionwide ozone-precursor emissions 

are projected to continue declining through the maintenance period due to the existing emissions 

control program, even considering the forecast recovery from the recession28 and ongoing growth in 

population and motor vehicle use. In fact, much of the emissions reduction benefit of the adopted 

rules and regulations has yet to be realized and is projected to occur during the maintenance period, 

due to the continued replacement of older vehicles, engines, and equipment with newer units subject 

to more stringent emission control requirements. These trends support the conclusion that the 

emission reductions that provided for ozone attainment are not temporary, but are permanent and 

enforceable. 

FIGURE 4-1

SAN DIEGO COUNTY

VOC + NOX EMISSION REDUCTIONS DESPITE GROWTH

4.3 METEOROLOGY NOT UNUSUALLY FAVORABLE 

The ozone concentrations that occur at a given location and time period depend both on ozoneprecursor emission levels and on meteorological conditions. Consequently, even if ozone-precursor 

emissions remain constant, the maximum ozone concentration will vary from one period to the next

 

28 ARB’s emissions projections presented herein assume the economy is starting to recover and will fully rebound 

sometime between 2017 (faster recovery scenario) and 2023 (slower recovery scenario). Rather than rely on either 

recovery scenario, ARB assumed a middle case between the two forecasts. 

0

200

400

600

800

1000

1200

2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024

Population/10000

Vehicle Miles per Day/100000 

VOC+NOx Emissions (tons/day)
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Ozone Redesignation Request and Maintenance Plan Page 4-4

due solely to the random nature of meteorological factors that affect ozone formation and 

dispersion.29 

The 1997 ozone NAAQS is based on a three-year averaging period, designed to minimize the effect 

of a single extreme year caused by unusual weather conditions and to more properly reflect the 

effect of changes in precursor emissions. By its very nature, the form of the standard helps ensure 

that attainment resulted from emission reductions and not from unusually favorable meteorology. 

Notwithstanding the inherent safeguard in the standard itself, meteorological parameters correlated 

with ozone formation were analyzed to verify attainment did not result from unusually favorable 

meteorology during the three-year attainment period. Temperature is a principal determinant of 

ozone formation, such that higher ozone concentrations occur more frequently on warmer days and 

lower concentrations occur more frequently on cooler days. Thus, the District reviewed historical 

temperature records to verify that the 2009–2011 attainment period was not unusually cool. 

Specifically, April-to-October "ozone season" average daily maximum temperatures were 

calculated for each year from 1993 (the earliest year available in the District’s meteorological 

database) through 2011. Then, to reflect the three-year measurement period of the ozone NAAQS, 

three-year temperature averages were calculated for the three-year periods ending with each year 

from 1995 through 2011. An overall long-term, 19-year average was also calculated for the entire 

1993–2011 period, to establish the temperature norm. Finally, the difference between each threeyear average and the long-term average was calculated, to determine the extent to which each threeyear period deviated from the norm. 

The results are presented in Table 4-2. The temperatures presented in the table were measured at 

the El Cajon monitoring site, which is in the downwind eastern metropolitan portion of the air 

basin, and is representative of areas along the path of the onshore breeze carrying emissions from 

the densely populated coastal area to the foothills, where maximum ozone concentrations occur. 

As indicated in Table 4-2, the three-year average daily maximum temperature for the 2009–2011

attainment period (78.5 degrees), though slightly cooler than the long-term average (78.9 degrees), 

was not unusually cool, in that six other three-year periods were at least as cool or cooler. Of the 

five previous three-year periods that were cooler than the attainment period, average daily 

maximum temperatures in four periods were from twice to three times as much cooler than the 

long-term average than was the 2009–2011 attainment period. Thus, the temperature records (as 

well as the nature of the standard itself, as described above) support the conclusion that attainment 

did not result from unusually favorable meteorology during the three-year attainment period. 

 

29 These factors include daily maximum temperature, average relative humidity, incoming solar radiation levels, and 

average wind speed and direction.
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TABLE 4-2

SAN DIEGO COUNTY

THREE-YEAR AVERAGE OZONE SEASON DAILY MAXIMUM TEMPERATURES

(Degrees Fahrenheit)

Three-Year 

Periods

El Cajon

Temp 

(°F)

Deviation 

(°F)

1993 - 1995 78.7 -0.2

1994 - 1996 79.2 0.3

1995 - 1997 80.1 1.3

1996 - 1998 79.5 0.6

1997 - 1999 78.6 -0.3

1998 - 2000 78.0 -0.9

1999 - 2001 78.4 -0.4

2000 - 2002 78.1 -0.8

2001 - 2003 77.7 -1.1

2002 - 2004 77.7 -1.2

2003 - 2005 78.3 -0.6

2004 - 2006 79.3 0.4

2005 - 2007 79.5 0.7

2006 - 2008 80.6 1.7

2007 - 2009 80.3 1.4

2008 - 2010 79.5 0.6

2009 - 2011 78.5 -0.4

Long-Term 

Average

1993 - 2011 78.9 ---

Source: Surface temperature data for El Cajon monitoring site, compiled by the District.
5.0 Maintenance Plan

Ozone Redesignation Request and Maintenance Plan Page 5-1

5.0 MAINTENANCE PLAN

For purposes of redesignation, the District must have an EPA-approved maintenance plan, 

pursuant to CAA section 175A, demonstrating that the area will maintain compliance with the 

1997 ozone NAAQS for at least 10 years after redesignation to attainment, and specifying 

contingency measures to be implemented if a violation is monitored at any time during the 10-

year maintenance period. EPA policy guidance30 requires, in addition to the maintenance 

demonstration and contingency measures, that the maintenance plan must also identify the 

attainment inventory, and commit to continued air quality monitoring and verification of 

continued attainment. As demonstrated in the following sections, the Maintenance Plan 

presented herein complies with the requirements of the CAA and EPA policy guidance. 

5.1 ATTAINMENT INVENTORY

The Maintenance Plan must identify the total regionwide level of ozone-precursor emissions that 

provided for attainment.30 Because the standard was attained in 2011, total daily VOC and NOx

emissions in 2011 represent the Attainment Inventory (see Table 5-1). 

TABLE 5-1

SAN DIEGO COUNTY

2011 OZONE ATTAINMENT INVENTORY

Pollutant Average Total Daily Emissions (tons)

Volatile organic compounds (VOC) 142.6

Nitrogen oxides (NOx) 137.5

Source: California Air Resources Board, Southern California 2012 SIP Baseline Emission Projection –

Version 1.02 Planning Inventory Tool website.

Notes: Emissions data reflect a "summer day," as required by EPA policy guidance.30

Emissions data assume no emissions reductions from NSR or Title V permit programs. 

Source category-specific data are listed in Appendix A to this Ozone Redesignation Request.

5.2 MAINTENANCE DEMONSTRATION

The Maintenance Plan must include a demonstration that the standard will be maintained for at 

least 10 years after the effective date of redesignation.31 To accommodate time for ARB and 

EPA to process the redesignation request, the Maintenance Plan horizon year is 2025, providing

a maintenance period of at least 10 years from the future effective date of redesignation (which is 

not yet known).

 

30 Calcagni, September 1992.

31 CAA Section 175A(a).
5.0 Maintenance Plan

Ozone Redesignation Request and Maintenance Plan Page 5-2

The 2011 Attainment Inventory of ozone precursors (Table 5-1) represents the regionwide 

emissions level that was sufficient to attain the 1997 ozone NAAQS. Maintenance is 

demonstrated by showing that projected future emissions levels through the maintenance period 

will not exceed the 2011 Attainment Inventory. Specifically, VOC emissions must stay at or 

below 142.6 tons per day and NOx emissions must stay at or below 137.5 tons per day for the 

entire maintenance period. 

Future emissions levels are forecasted by adjusting the attainment year emissions inventory to 

reflect projected growth in emitting activities and additional control of emission rates that will be 

provided by continued implementation of the existing federal, State and District emissions 

control regulations. Growth in emitting activities is projected based on forecasted growth in

socio-economic factors such as population, employment, industrial production, and vehicle miles 

of travel. 

By contrast, changes in military activity do not follow socio-economic factors. Therefore, the

District obtained from the Department of the Navy, for inclusion in the maintenance 

demonstration, a projection of future mobile source emissions from potential military actions that 

may occur during the maintenance period at Coast Guard, Navy, and Marine Corps facilities in 

San Diego County.

32 Accordingly, the future emissions projections for the maintenance 

demonstration include a line item for potential future military activity (beyond that assumed in 

the baseline emissions) of one ton per day of VOC emissions and 4.4 tons per day of NOx (see 

Appendix A, Tables A-1 and A-2). This updated projection of potential military-related 

emissions growth is less than half as much as the previous projection that was incorporated in the 

currently applicable 1-hour ozone Maintenance Plan. 

As indicated in Table 5-2, total regionwide emissions of VOC and NOx will steadily decline 

through the maintenance period due to the existing emissions control program (despite forecasted 

growth in population, employment, travel, and military activities), to well below the 2011 level 

that provided for attainment. In fact, by 2025, San Diego County ozone precursor emissions are 

projected to decrease by 12.1 tons per day (8 %) for VOC and 49.7 tons per day (36%) for NOx, 

relative to the 2011 Attainment Inventory. Consequently, future violations of the ozone standard 

are not anticipated and maintenance is thus demonstrated.

 

32 Department of Navy Emissions Growth Increment Request for the San Diego Air Pollution Control District, May 

24, 2011.
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TABLE 5-2

OZONE MAINTENANCE DEMONSTRATION

2011 – 2025 MAINTENANCE PERIOD

PROJECTED INVENTORY OF OZONE PRECURSORS

Pollutant

Average Total Daily Emissions in San Diego County (tons)

2011 2015 2020 2025

VOC 142.6 133.9 130.3 130.6

NOx 137.5 119.9 98.9 87.8

Source: California Air Resources Board, Southern California 2012 SIP Baseline Emission Projection –

Version 1.02 Planning Inventory Tool website.

Notes: Emissions data are based on a 2008 base year and reflect "summer day."

Emissions data assume no emissions reductions from NSR or Title V permit programs. 

Source category-specific data are listed in Appendix A to this Ozone Redesignation Request.

5.3 TRANSPORTATION CONFORMITY EMISSIONS BUDGETS 

The CAA requires transportation planning to be consistent with air quality goals. This is 

determined through the federally mandated transportation conformity process. 

The federal transportation conformity regulation33 requires the Maintenance Plan to specify onroad motor vehicle emissions "budgets" for the horizon year and any interim milestone years. 

The emissions budgets represent the maximum allowable levels of NOx and VOC emissions 

from on-road vehicle travel on the region's transportation system that will conform to the 

Maintenance Plan.34 Emissions projected to result from implementation of the long-range 

regional transportation plan (RTP) and shorter-term regional transportation improvement 

program (RTIP) may not exceed these emissions budgets.

Conformity determinations must be made by the San Diego Association of Governments 

(SANDAG) at least every four years, but may occur more frequently if their RTP or RTIP is 

updated or amended (with non-exempt projects) more frequently. Also, conformity 

determinations must be made within two years after emissions budgets are found adequate or 

approved by EPA, whichever is first. Conformity determinations are subject to final approval by 

the U.S. Department of Transportation.

Emissions budgets are established in this Maintenance Plan for the 2025 horizon year and an 

interim year, 2020 (Table 5-3). The 2025 horizon year emissions budgets will also apply to all 

 

33 40 CFR 93 ("Determining Conformity of Federal Actions to State or Federal Implementation Plans").

34 40 CFR 93.118 ("Criteria and Procedures: Motor Vehicle Emissions Budget").
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post-2025 future transportation conformity analysis years, as authorized in the federal 

transportation conformity regulation.35 

TABLE 5-3

SAN DIEGO COUNTY

ON-ROAD MOTOR VEHICLE EMISSIONS BUDGETS

OZONE MAINTENANCE PERIOD

(Tons Per Day)

Pollutant 2020 2025 and Subsequent Years

VOC 23 21

NOx 38 30

Note: Emissions budgets are based on ARB’s EMFAC2011 motor vehicle emissions model and reflect 

"summer day."

The emissions budgets presented in Table 5-3 represent the on-road motor vehicle emissions 

levels projected for 2020 and 2025, as determined using ARB’s EMFAC2011 on-road motor 

vehicle emissions estimation model, with travel activity forecasts by SANDAG. To account for 

imprecision and potential future adjustments in the on-road motor vehicle emissions modeling 

process, the emissions budgets were derived from EMFAC2011 estimates by rounding up to the 

next whole number (tons), and adding two. 

The budgets are environmentally conservative in that they are substantially lower (more 

stringent) than the 2011 onroad emissions levels needed to provide for maintenance of the 1997 

ozone NAAQS. By requiring future reductions in emissions from on-road vehicle travel, these 

budgets readily provide for such maintenance, as well as continue the region’s progress toward 

attaining the more-stringent 2008 ozone NAAQS.

Because the emissions budgets are expressed as whole numbers, on-road motor vehicle 

emissions estimates (in tons per day) should be rounded to whole numbers using standard 

rounding conventions (.49 rounds down; .50 rounds up), prior to being compared to the 

emissions budgets for purposes of transportation conformity determinations. 

5.4 MAINTENANCE STRATEGY

All existing NOx and VOC emission control rules and regulations approved into the Ozone SIP 

and applicable to San Diego County are retained in this Maintenance Plan. The District and 

State measures that have been submitted into the Ozone SIP and the federal measures that 

 

35 40 CFR 93.118(b)(2) ("Criteria and Procedures: Motor Vehicle Emissions Budget").
5.0 Maintenance Plan

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control VOC and NOx emissions are listed in Appendix B. Any revisions to existing SIP rules 

subsequently determined to be necessary will be submitted to EPA for approval as SIP revisions. 

5.5 CONTINUED MONITORING

The District commits to continue operating the ambient ozone monitoring network, quality 

assuring the resulting monitoring data, and entering all data into the AQS in accordance with 

federal requirements and guidelines. Should changes in the location of an ozone monitor 

become necessary, the District commits to work with EPA to ensure the adequacy of the 

monitoring network.

5.6 VERIFICATION OF MAINTENANCE

The District commits to annually reviewing ozone monitoring data from the three most recent, 

consecutive years to verify continued attainment of the 1997 ozone NAAQS through the 

maintenance period. 

5.7 CONTINGENCY PLAN

Despite best efforts to ensure continued compliance with the 1997 ozone NAAQS, it is possible, 

although not anticipated, that future ambient ozone concentrations could violate the NAAQS. 

Therefore, pursuant to the CAA, section 175A(d), the Maintenance Plan must identify 

contingency measures to be implemented to correct any future violation that might occur after 

the region has been redesignated to attainment. Specifically, the Maintenance Plan must identify 

the contingency measures to be considered for possible adoption, a schedule and procedure for 

adoption and implementation of the selected contingency measures, and a time limit for action. 

It must also identify specific indicators or triggers to be used to determine when the contingency 

measures need to be adopted and implemented. 

Typically, contingency measures are held in reserve, to be adopted and implemented only if an 

area violates the standard (or exceeds another identified trigger level) in the future. However, 

California's on-going emissions control program creates a unique situation, allowing this 

Maintenance Plan to identify a set of recently adopted ARB mobile source control regulations

that will be implemented through the maintenance period (collectively referred to as California’s

Advanced Clean Cars Program) as a contingency measure that will be implemented regardless of 

monitored ozone levels. 

The Advanced Clean Cars Program, adopted on January 27, 2012, will progressively tighten 

emissions control requirements for motor vehicles through model year 2025, and thus will 

provide additional emissions reductions year after year during the maintenance period, over and 

above those that provided for attainment and beyond those that are relied on herein to 

demonstrate maintenance. Since the Advanced Clean Cars Program was not reflected in 

EMFAC2011, and the emissions inventory used for the maintenance demonstration herein is 

based on EMFAC2011, the emission reductions from the Advanced Clean Cars Program are

surplus to the maintenance demonstration, and therefore are eligible as a contingency measure. 
5.0 Maintenance Plan

Ozone Redesignation Request and Maintenance Plan Page 5-6

This contingency measure will provide significant continuing emissions reductions through the 

maintenance period (and for sometime thereafter), and thus provide adequate additional 

reductions to address the CAA’s contingency requirements. As previously indicated (Table 5-2), 

by 2025, the existing control program, without crediting the Advanced Clean Cars Program, is 

projected to reduce San Diego County ozone precursor emissions by 12.1 tons per day (8%) for 

VOC, and 49.7 tons per day (36%) for NOx, below the 2011 emissions level that provided for 

attainment. The Advanced Clean Cars Program is expected to provide about 2 tons per day 

additional reductions in each precursor by 2025. Therefore, if a new violation were to occur 

during the maintenance period, continuing additional emissions reductions are projected to 

ensure any violation will be quickly corrected and then provide for continued maintenance of the 

1997 ozone NAAQS in San Diego County through the maintenance period. 

Additionally, CAA, section 175A(d) requires that the contingency measures include a 

commitment that, should there be a violation after redesignation to attainment, the region will 

implement all control measures contained in its Ozone Nonattainment SIP prior to redesignation. 

As previously indicated (Section 5.4), all measures in the Ozone Nonattainment SIP for San 

Diego County are retained in this Maintenance Plan. Therefore, there are no deferred SIP 

measures to transfer into the contingency plan. 

In addition to the above contingency measures, in the event of a monitored violation of the 1997 

ozone NAAQS that is based on complete, quality-assured, and certified monitoring data, the 

District commits to work with ARB to ensure the expeditious adoption, submittal as a SIP 

revision, and implementation of any additional feasible measure(s) needed to promptly correct 

the violation. Potential selection of additional contingency measures will be based on 

considerations such as emission reduction potential, cost effectiveness, and other environmental, 

economic, legal, social, technological, and energy factors prevailing in the region. 

5.8 SUBSEQUENT PLAN REVISIONS

CAA section 175A(b) requires a second Maintenance SIP submittal eight years after the 

effective date of redesignation, to provide for continued maintenance of the NAAQS for an 

additional 10-year period. However, it is anticipated that when EPA promulgates an 

implementation rule for the more health-protective 2008 ozone NAAQS, that rule will revoke the 

1997 ozone NAAQS on July 20, 2013. It is further anticipated that the rule will provide that 

after the 1997 ozone NAAQS is revoked, then maintenance plans for the 1997 ozone NAAQS 

will no longer need to include a commitment to prepare a second maintenance plan for the 

revoked standard. Consequently, this Maintenance Plan commits to submittal of a second 

Maintenance SIP eight years after the effective date of redesignation, unless the rule revoking the 

1997 ozone NAAQS provides that the second Maintenance SIP will not be required.
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-1

APPENDIX A

PROJECTED EMISSIONS INVENTORIES

TABLE A-1

SAN DIEGO COUNTY

VOC PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

ELECTRIC UTILITIES 0.4 0.3 0.2 0.2 0.2

COGENERATION 0.0 0.1 0.1 0.1 0.1

MANUFACTURING AND INDUSTRIAL 0.1 0.1 0.1 0.1 0.1

FOOD AND AGRICULTURAL 

PROCESSING 0.1 0.0 0.0 0.0 0.0

SERVICE AND COMMERCIAL 0.2 0.2 0.2 0.2 0.2

OTHER (FUEL COMBUSTION) 0.2 0.1 0.1 0.1 0.1

SEWAGE TREATMENT 0.0 0.0 0.0 0.1 0.1

LANDFILLS 1.6 2.0 2.2 2.3 2.3

INCINERATORS 0.0 0.0 0.0 0.0 0.0

SOIL REMEDIATION 0.0 0.0 0.0 0.0 0.0

OTHER (WASTE DISPOSAL) 0.2 0.2 0.3 0.3 0.3

LAUNDERING 0.3 0.6 0.6 0.6 0.6

DEGREASING 1.7 1.9 2.0 2.1 2.1

COATINGS AND RELATED PROCESS 

SOLVENTS 6.4 7.0 7.6 8.3 8.3

PRINTING 3.8 4.2 4.6 5.0 5.0

ADHESIVES AND SEALANTS 3.1 2.5 2.3 2.0 2.0

OTHER (CLEANING AND SURFACE 

COATINGS) 0.1 0.1 0.1 0.1 0.1

PETROLEUM MARKETING 7.8 9.1 9.7 10.4 10.6

OTHER (PETROLEUM PRODUCTION & 

MARKETING) 0.0 0.0 0.0 0.0 0.0

CHEMICAL 1.4 1.7 2.0 2.4 2.9

FOOD AND AGRICULTURE 0.1 0.1 0.1 0.1 0.1

MINERAL PROCESSES 0.2 0.2 0.2 0.2 0.3

METAL PROCESSES 0.0 0.0 0.0 0.0 0.0

GLASS AND RELATED PRODUCTS 0.0 0.0 0.0 0.0 0.0

ELECTRONICS 0.0 0.0 0.0 0.0 0.0

OTHER (INDUSTRIAL PROCESSES) 0.6 0.5 0.8 1.1 1.3

STATIONARY SOURCES SUBTOTAL 28.4 31.1 33.1 35.8 36.8
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-2

TABLE A-1 (CONTINUED)

SAN DIEGO COUNTY

VOC PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

CONSUMER PRODUCTS 22.5 17.9 16.9 17.6 18.3

ARCHITECTURAL COATINGS AND 

SOLVENTS 12.5 11.6 11.9 12.4 12.4

PESTICIDES/FERTILIZERS 1.2 0.6 0.5 0.5 0.5

ASPHALT PAVING / ROOFING 1.8 1.8 1.8 1.9 1.9

RESIDENTIAL FUEL COMBUSTION 0.8 0.5 0.5 0.5 0.5

FARMING OPERATIONS 1.3 1.3 1.3 1.3 1.3

CONSTRUCTION AND DEMOLITION 0.0 0.0 0.0 0.0 0.0

PAVED ROAD DUST 0.0 0.0 0.0 0.0 0.0

UNPAVED ROAD DUST 0.0 0.0 0.0 0.0 0.0

FUGITIVE WINDBLOWN DUST 0.0 0.0 0.0 0.0 0.0

FIRES 0.0 0.1 0.1 0.1 0.1

MANAGED BURNING AND DISPOSAL 0.2 0.2 0.2 0.2 0.2

COOKING 1.9 2.0 2.1 2.3 2.5

OTHER (MISCELLANEOUS PROCESSES) 0.0 0.0 0.0 0.0 0.0

AREAWIDE SOURCES SUBTOTAL 42.2 35.9 35.3 36.7 37.5
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-3

TABLE A-1 (CONTINUED)

SAN DIEGO COUNTY

VOC PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

LIGHT DUTY PASSENGER (LDA) 33.3 14.5 9.4 6.2 5.4

LIGHT DUTY TRUCKS - 1 (LDT1) 7.1 3.8 2.9 2.2 1.8

LIGHT DUTY TRUCKS - 2 (LDT2) 10.3 5.0 3.9 2.9 2.5

MEDIUM DUTY TRUCKS (MDV) 3.8 4.0 3.9 3.4 3.1

LIGHT HEAVY DUTY GAS TRUCKS - 1 

(LHDV1) 1.0 1.9 1.7 1.4 1.1

LIGHT HEAVY DUTY GAS TRUCKS - 2 

(LHDV2) 0.5 0.2 0.1 0.1 0.1

MEDIUM HEAVY DUTY GAS TRUCKS 

(MHDV) 0.8 0.4 0.2 0.1 0.1

HEAVY HEAVY DUTY GAS TRUCKS 

(HHDV) 0.3 0.1 0.0 0.0 0.0

LIGHT HEAVY DUTY DIESEL TRUCKS - 1 

(LHDV1) 0.1 0.3 0.3 0.2 0.2

LIGHT HEAVY DUTY DIESEL TRUCKS - 2 

(LHDV2) 0.1 0.1 0.1 0.1 0.0

MEDIUM HEAVY DUTY DIESEL TRUCKS 

(MHDV) 0.7 0.4 0.2 0.1 0.1

HEAVY HEAVY DUTY DIESEL TRUCKS 

(HHDV) 1.8 1.1 0.7 0.7 0.8

MOTORCYCLES (MCY) 2.6 2.9 2.7 2.7 2.8

HEAVY DUTY DIESEL URBAN BUSES 

(UB) 0.1 0.1 0.1 0.1 0.1

HEAVY DUTY GAS URBAN BUSES (UB) 0.0 0.0 0.0 0.0 0.0

SCHOOL BUSES - GAS (SBG) 0.1 0.1 0.0 0.0 0.0

SCHOOL BUSES - DIESEL (SBD) 0.1 0.0 0.0 0.0 0.0

OTHER BUSES - GAS (OBG) 0.1 0.1 0.1 0.1 0.1

OTHER BUSES - MOTOR COACH - DIESEL 

(OBC) 0.1 0.0 0.0 0.0 0.0

ALL OTHER BUSES - DIESEL (OBD) 0.0 0.0 0.0 0.0 0.0

MOTOR HOMES (MH) 0.5 0.2 0.1 0.0 0.0

ON-ROAD MOTOR VEHICLES 

SUBTOTAL 63.4 35.3 26.4 20.5 18.3
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-4

TABLE A-1 (CONTINUED)

SAN DIEGO COUNTY

VOC PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

AIRCRAFT* 3.2 2.5 2.5 2.6 2.6

TRAINS 0.1 0.1 0.1 0.1 0.1

OCEAN GOING VESSELS* 0.7 0.7 0.8 0.9 1.0

COMMERCIAL HARBOR CRAFT 0.6 0.6 0.5 0.5 0.5

RECREATIONAL BOATS 19.2 16.6 15.7 15.4 15.9

OFF-ROAD RECREATIONAL VEHICLES 2.0 2.6 2.5 2.6 2.7

OFF-ROAD EQUIPMENT* 17.8 14.1 12.6 11.5 11.7

FARM EQUIPMENT 1.1 0.7 0.5 0.3 0.2

FUEL STORAGE AND HANDLING 4.5 2.4 1.9 1.6 1.4

NON-ROAD MOBILE SOURCES 

SUBTOTAL 49.1 40.3 37.1 35.4 36.1

BANKED EMISSION CREDITS** 0.9 0.9 0.9

POTENTIAL FUTURE MILITARY 

ACTIVITY*** 1.0 1.0 1.0

TOTAL VOC 183.1 142.6 133.9 130.3 130.6

Source: Except as indicated below, emissions estimates are from ARB’s Southern California 2012 SIP 

Baseline Emission Projection – Version 1.02 Planning Inventory Tool website. Documentation of ARB’s 

emission inventory methodologies is at http://www.arb.ca.gov/ei/documentation.htm. 

Emissions data reflect a “summer day,” as required by EPA policy guidance.

Emissions data assume no emissions reductions from NSR or Title V permit programs.

*Emissions estimates for Aircraft, Ocean-Going Vessels, and Off-Road Equipment incorporate updated 

baseline military emissions estimates for those source categories, provided by the Department of the Navy 

in April 2011, which were not included in ARB’s emissions inventory.

**To demonstrate that utilization of banked emissions credits will not interfere with maintenance, 

emissions amounting to the sum of all banked emissions credits were added to future emissions 

projections.

***Because potential changes in military activities do not follow socio-economic factors, the District 

obtained from the Department of the Navy, for inclusion in the maintenance demonstration, a projection 

of future mobile source emissions from potential additional military activity (beyond that assumed in the 

baseline emissions) that may occur during the maintenance period at Coast Guard, Navy, and Marine 

Corps facilities in San Diego County, “Department of Navy Emissions Growth Increment Request for the 

San Diego Air Pollution Control District,” May 24, 2011.
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-5

TABLE A-2

SAN DIEGO COUNTY

NOX PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

ELECTRIC UTILITIES 2.4 1.7 1.1 1.1 1.1

COGENERATION 0.0 0.6 0.6 0.7 0.7

MANUFACTURING AND INDUSTRIAL 1.4 0.9 0.9 1.0 1.0

FOOD AND AGRICULTURAL 

PROCESSING 0.7 0.3 0.2 0.1 0.1

SERVICE AND COMMERCIAL 1.5 1.1 1.2 1.2 1.3

OTHER (FUEL COMBUSTION) 1.8 1.2 1.0 0.9 0.9

SEWAGE TREATMENT 0.1 0.1 0.1 0.1 0.1

LANDFILLS 0.2 0.2 0.2 0.2 0.2

INCINERATORS 0.0 0.0 0.0 0.0 0.0

SOIL REMEDIATION 0.0 0.0 0.0 0.0 0.0

OTHER (WASTE DISPOSAL) 0.0 0.0 0.0 0.0 0.0

LAUNDERING 0.0 0.0 0.0 0.0 0.0

DEGREASING 0.0 0.0 0.0 0.0 0.0

COATINGS AND RELATED PROCESS 

SOLVENTS 0.0 0.0 0.0 0.0 0.0

PRINTING 0.0 0.0 0.0 0.0 0.0

ADHESIVES AND SEALANTS 0.0 0.0 0.0 0.0 0.0

OTHER (CLEANING AND SURFACE 

COATINGS) 0.0 0.0 0.0 0.0 0.0

PETROLEUM MARKETING 0.0 0.0 0.0 0.0 0.0

OTHER (PETROLEUM PRODUCTION & 

MARKETING) 0.0 0.0 0.0 0.0 0.0

CHEMICAL 0.0 0.0 0.0 0.0 0.0

FOOD AND AGRICULTURE 0.0 0.0 0.0 0.0 0.0

MINERAL PROCESSES 0.2 0.2 0.2 0.2 0.2

METAL PROCESSES 0.0 0.0 0.0 0.0 0.0

GLASS AND RELATED PRODUCTS 0.0 0.0 0.0 0.0 0.0

ELECTRONICS 0.0 0.0 0.0 0.0 0.0

OTHER (INDUSTRIAL PROCESSES) 0.1 0.0 0.1 0.1 0.1

STATIONARY SOURCES SUBTOTAL 8.2 6.3 5.6 5.5 5.6
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-6

TABLE A-2 (CONTINUED)

SAN DIEGO COUNTY

NOX PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

CONSUMER PRODUCTS 0.0 0.0 0.0 0.0 0.0

ARCHITECTURAL COATINGS AND 

SOLVENTS 0.0 0.0 0.0 0.0 0.0

PESTICIDES/FERTILIZERS 0.0 0.0 0.0 0.0 0.0

ASPHALT PAVING / ROOFING 0.0 0.0 0.0 0.0 0.0

RESIDENTIAL FUEL COMBUSTION 1.8 1.7 1.7 1.8 1.9

FARMING OPERATIONS 0.0 0.0 0.0 0.0 0.0

CONSTRUCTION AND DEMOLITION 0.0 0.0 0.0 0.0 0.0

PAVED ROAD DUST 0.0 0.0 0.0 0.0 0.0

UNPAVED ROAD DUST 0.0 0.0 0.0 0.0 0.0

FUGITIVE WINDBLOWN DUST 0.0 0.0 0.0 0.0 0.0

FIRES 0.0 0.0 0.0 0.0 0.0

MANAGED BURNING AND DISPOSAL 0.1 0.1 0.1 0.1 0.1

COOKING 0.0 0.0 0.0 0.0 0.0

OTHER (MISCELLANEOUS PROCESSES) 0.0 0.0 0.0 0.0 0.0

AREAWIDE SOURCES SUBTOTAL 1.9 1.7 1.8 1.9 2.0
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-7

TABLE A-2 (CONTINUED)

SAN DIEGO COUNTY

NOX PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

LIGHT DUTY PASSENGER (LDA) 28.9 11.2 7.5 5.4 5.0

LIGHT DUTY TRUCKS - 1 (LDT1) 6.9 2.9 2.1 1.4 1.0

LIGHT DUTY TRUCKS - 2 (LDT2) 16.8 6.4 4.1 2.5 1.9

MEDIUM DUTY TRUCKS (MDV) 7.6 6.3 4.9 3.5 2.6

LIGHT HEAVY DUTY GAS TRUCKS - 1 

(LHDV1) 1.3 2.8 2.5 2.1 1.8

LIGHT HEAVY DUTY GAS TRUCKS - 2 

(LHDV2) 0.4 0.2 0.2 0.2 0.1

MEDIUM HEAVY DUTY GAS TRUCKS 

(MHDV) 1.0 0.6 0.4 0.3 0.2

HEAVY HEAVY DUTY GAS TRUCKS 

(HHDV) 0.5 0.2 0.2 0.1 0.1

LIGHT HEAVY DUTY DIESEL TRUCKS - 1 

(LHDV1) 2.2 6.1 4.9 3.6 2.6

LIGHT HEAVY DUTY DIESEL TRUCKS - 2 

(LHDV2) 1.5 1.5 1.2 0.9 0.6

MEDIUM HEAVY DUTY DIESEL TRUCKS 

(MHDV) 12.5 6.9 4.5 2.1 1.2

HEAVY HEAVY DUTY DIESEL TRUCKS 

(HHDV) 33.7 19.7 14.7 9.4 6.3

MOTORCYCLES (MCY) 0.4 0.8 0.8 0.8 0.8

HEAVY DUTY DIESEL URBAN BUSES 

(UB) 2.3 2.5 2.3 2.1 2.1

HEAVY DUTY GAS URBAN BUSES (UB) 0.1 0.1 0.1 0.1 0.1

SCHOOL BUSES - GAS (SBG) 0.1 0.1 0.0 0.0 0.0

SCHOOL BUSES - DIESEL (SBD) 0.8 0.5 0.5 0.4 0.4

OTHER BUSES - GAS (OBG) 0.2 0.3 0.2 0.2 0.1

OTHER BUSES - MOTOR COACH - DIESEL 

(OBC) 1.0 0.6 0.4 0.2 0.1

ALL OTHER BUSES - DIESEL (OBD) 0.6 0.4 0.3 0.2 0.1

MOTOR HOMES (MH) 1.2 0.8 0.6 0.5 0.4

ON-ROAD MOTOR VEHICLES 

SUBTOTAL 119.9 70.9 52.5 35.9 27.6
Appendix A: Projected Emissions Inventories

Ozone Redesignation Request and Maintenance Plan Page A-8

TABLE A-2 (CONTINUED)

SAN DIEGO COUNTY

NOX PROJECTED EMISSIONS INVENTORY

(Tons/Day)

Emissions Source Category 2002 2011 2015 2020 2025

AIRCRAFT* 4.9 7.1 7.3 7.6 7.6

TRAINS 1.4 1.5 1.7 1.8 2.0

OCEAN GOING VESSELS* 13.7 14.3 15.2 15.7 14.6

COMMERCIAL HARBOR CRAFT 9.9 8.0 5.6 4.3 3.9

RECREATIONAL BOATS 4.8 6.7 6.8 6.9 7.0

OFF-ROAD RECREATIONAL VEHICLES 0.0 0.0 0.0 0.1 0.1

OFF-ROAD EQUIPMENT* 28.0 17.6 15.9 12.5 11.2

FARM EQUIPMENT 5.3 3.4 2.4 1.5 1.0

FUEL STORAGE AND HANDLING 0.0 0.0 0.0 0.0 0.0

NON-ROAD MOBILE SOURCES 

SUBTOTAL 68.0 58.6 54.9 50.4 47.5

BANKED EMISSIONS CREDITS** 0.7 0.7 0.7

POTENTIAL FUTURE MILITARY 

ACTIVITY*** 4.4 4.4 4.4

TOTAL NOX 198.1 137.5 119.9 98.9 87.8

Source: Except as indicated below, emissions estimates are from ARB’s Southern California 2012 SIP 

Baseline Emission Projection – Version 1.02 Planning Inventory Tool website.

Documentation of ARB’s emission inventory methodologies is at 

http://www.arb.ca.gov/ei/documentation.htm. 

Emissions data reflect a “summer day,” as required by EPA policy guidance.

Emissions data assume no emissions reductions from NSR or Title V permit programs.

*Emissions estimates for Aircraft, Ocean-Going Vessels, and Off-Road Equipment incorporate updated 

baseline military emissions estimates for those source categories, provided by the Department of the Navy 

in April 2011, which were not included in ARB’s emissions inventory.

**To demonstrate that utilization of banked emissions credits will not interfere with maintenance, 

emissions amounting to the sum of all banked emissions credits were added to future emissions 

projections.

***Because potential changes in military activities do not follow socio-economic factors, the District 

obtained from the Department of the Navy, for inclusion in the maintenance demonstration, a projection 

of future mobile source emissions from potential additional military activity (beyond that assumed in the 

baseline emissions) that may occur during the maintenance period at Coast Guard, Navy, and Marine 

Corps facilities in San Diego County, “Department of Navy Emissions Growth Increment Request for the 

San Diego Air Pollution Control District,” May 24, 2011.
Appendix B: District, State and Federal Emission Control Programs

Ozone Redesignation Request and Maintenance Plan Page B-1

APPENDIX B

District, State and Federal Emission Control Programs

San Diego District Rules in the Ozone SIP that Regulate 

VOC and NOx Emissions at Stationary Sources

District Rules SIP Approval Date

61.0 - Definitions Pertaining to the Storage 

and Handling of Organic Compounds Approved 09/13/1993, 58 FR 47831

61.1 - Receiving and Storing Volatile 

Organic Compounds at Bulk Plants and 

Bulk Terminals

Approved 08/08/1995, 60 FR 40285

61.2 - Transfer of Organic Compounds 

Into Mobile Transport Tanks Approved 08/26/2003, 68 FR 51186

61.3 - Transfer of Volatile Organic 

Compounds into Stationary Storage Tanks Approved 06/30/1993, 58 FR 34906

61.4 - Transfer of Volatile Organic 

Compounds into Vehicles Fuel Tanks Approved 05/13/1993, 58 FR 28354

61.5 - Visible Emission Standards for 

Vapor Control Systems Approved 04/14/1981, 46 FR 21757

61.7 - Spillage and Leakage of Volatile 

Organic Compounds Approved 03/11/1998, 63 FR 11831

61.8 - Certification Requirements for 

Vapor Control Equipment Approved 03/11/1998, 63 FR 11831

66 – Organic Solvents Approved 08/11/1998, 63 FR 42724

67.0 – Architectural Coatings Approved 03/27/1997, 62 FR 14639

67.1 - Alternative Emission Control Plans Approved 03/27/1997, 62 FR 14639

67.2 - Dry Cleaning Equipment Using 

Petroleum-Based Solvent Approved 03/27/1997, 62 FR 14639

67.3 - Metal Parts and Products Coating 

Operations Approved 11/14/2003, 68 FR 64538

67.4 - Metal Container, Metal Closure and 

Metal Coil Coating Operations Approved 11/03/1997, 62 FR 59284

67.5 – Paper, Film and Fabric Coating 

Operations Approved 03/27/1997, 62 FR 14639

67.6 - Solvent Cleaning Operations Approved 12/13/1994, 59 FR 64132

67.6.1 - Cold Solvent Cleaning and 

Stripping Operations Approved 10/13/2009, 74 FR 52427

67.6.2 - Vapor Degreasing Operations Approved 10/13/2009, 74 FR 52427

67.7 - Cutback and Emulsified Asphalts Approved 03/27/1997, 62 FR 14639

67.9 - Aerospace Coating Operations Approved 08/17/1998, 63 FR 43884

67.10 - Kelp Processing and Bio-Polymer 

Manufacturing Operations Approved 06/22/1998, 63 FR 33854
Appendix B: District, State and Federal Emission Control Programs

Ozone Redesignation Request and Maintenance Plan Page B-2

San Diego District Rules in the Ozone SIP that Regulate

VOC and NOx Emissions at Stationary Sources

(Continued)

District Rules SIP Approval Date

67.11.1 – Large Coating Operations for 

Wood Products Approved 06/05/2003, 68 FR 33635

67.12 - Polyester Resin Operations Approved 03/27/1997, 62 FR 14639

67.15 - Pharmaceutical and Cosmetic 

Manufacturing Operations Approved 03/27/1997, 62 FR 14639

67.16 - Graphic Arts Operations Approved 03/27/1997, 62 FR 14639

67.17 - Storage of Materials Containing 

Volatile Organic Compounds Approved 03/27/1997, 62 FR 14639

67.18 - Marine Coating Operations Approved 03/27/1997, 62 FR 14639

67.19 - Coatings and Printing Inks 

Manufacturing Operations Approved 05/26/2000, 65 FR 34101

67.24 - Bakery Ovens Approved 03/27/1997, 62 FR 14639

68 - Fuel-Burning Equipment - Oxides of 

Nitrogen Approved 04/09/1996, 61 FR 15719

69.2 - Industrial and Commercial Boilers, 

Process Heaters and Steam Generators Approved 02/09/1996, 61 FR 4887

69.3 - Stationary Gas Turbine Engines –

Reasonably Available Control Technology Approved 06/17/1997, 62 FR 32691

69.4 - Stationary Reciprocating Internal 

Combustion Engines – Reasonably

Available Control Technology

Approved 01/04/2006, 71 FR 244
Appendix B: District, State and Federal Emission Control Programs

Ozone Redesignation Request and Maintenance Plan Page B-3

ARB Ozone Precursor Emission Reduction Measures

Since 2007, ARB has adopted a number of statewide measures that will further reduce ozone 

precursor emissions in the San Diego region. As shown below, the majority of ARB measures in 

the 2007 8-Hour Ozone SIP have been sent to U.S. EPA as revisions to the SIP or as requests for 

waivers (CAA Section 209(b)) or for authorizations (CAA Section 209(e)(2)). 

Measure Date of Adoption Date Sent to U.S. EPA

Modifications to Reformulated 

Gasoline June 14, 2007 Feb. 3, 2009

Vapor Recovery for Above-Ground 

Storage Tanks June 21, 2007 June 12, 2008

Clean Up Existing Harbor Craft Nov. 15, 2007 April 12, 2010

Ship Auxiliary Engine Cold Ironing 

and Clean Technology Dec. 6, 2007 Aug. 2, 2010

Consumer Products Program

-- 2008 Amendment

-- 2009 Amendment

June 26, 2008

Sept. 24, 2009

Feb. 16, 2010

Jan. 28, 2011

Additional Evaporative Emission 

Standards Sept. 25, 2008 May 2, 2011

Portable Outboard Marine Tanks Sept. 25, 2008 May 2, 2011

Smog Check Improvements Aug. 31, 2009 Oct. 28, 2009

Pesticides Element Oct. 12, 2009 Aug. 2, 2011

Cleaner In-Use Heavy-Duty Trucks Dec. 16, 2010 Sept. 21, 2011

Cleaner In-Use Off-Road Equipment Dec. 17, 2010 Sept. 21, 2011

Port Truck Modernization Dec. 17, 2010 Sept. 21, 2011

Cleaner Main Ship Engines and Fuel 

for Ocean-Going Vessels June 23, 2011 Sept. 21, 2011
Appendix B: District, State and Federal Emission Control Programs

Ozone Redesignation Request and Maintenance Plan Page B-4

Air Resources Board SIP Control Measures (1994-2006)

Air Resources Board Action Date

In-Use Diesel Agricultural Engine Requirements 2006

Consumer Product Lower Emission Limits 2006

Zero Emission Bus Rule Amendments 2006

Off-Highway Recreational Vehicle Regulation Amendments 2006

Forklifts and Other Spark- Ignition Equipment Regulation 2006

Border Truck Inspection Program Protocol Improvements 2006

Ship Auxiliary Engine Cleaner Fuel Requirements 2005

Diesel Cargo Handling Equipment Rule 2005

Public and Utility Diesel Truck Fleet Rule 2005

Heavy-Duty Sleeper Truck Idling Limits 2005

Portable Fuel Container Requirements 2005

Transit Bus Rule Additions 2004

Off-Road Diesel Engine Tier 4 Standards 2004

Harbor Craft and Locomotive Clean Diesel Fuel Requirement 2004

Idling Limits for Trucks 2004

Consumer Products Rule 2004

Chip Reflash to Detect Truck Emission Control System Failure 2004

Transportation Refrigeration Unit Rule 2004

Portable Diesel Engine Emission Standards 2004

Stationary Diesel Engine Regulation 2004

Solid Waste Collection Vehicle Regulation 2003

Lawn and Garden Equipment Emission Standards 2003

Low Sulfur Diesel Fuel Regulation 2003

California ZEV Requirement Update 2003

Heavy-Duty Gas Truck Emission Standards 2002

Heavy-Duty Diesel Truck Emission Standards 2001

Inboard and Sterndrive Marine Engine Emission Standards 2001

Architectural Coatings Suggested Control Measure 2000

Urban Transit Bus Fleet Rule 2000

Off-Road Diesel Equipment Emission Standards 2000

Reformulated Gas MTBE Phase Out 1999

Consumer Product Emission Limits 1999

Portable Fuel Can Regulation 1999

Marine Pleasurecraft Emission Standards 1998

Low-Emission Vehicle Program (LEV II) Exhaust Standards 1998

Large Off-Road Gas/LPG Engine Emission Standards 1998

Cleaner Burning Gasoline Rule Improvements 1998

On-Road Heavy-Duty Truck Exhaust Emission Standards 1998

Light-Duty Vehicle Off-Cycle Emission Controls 1997

Consumer Product Emission Limits 1997

Locomotive Memorandum of Agreement for the South Coast 1997

Medium- and Heavy-Duty Gas Truck Emission Standards 1995
Appendix B: District, State and Federal Emission Control Programs

Ozone Redesignation Request and Maintenance Plan Page B-5

Air Resources Board SIP Control Measures (1994-2006)

(Continued)

Air Resources Board Action Date

Aerosol Coatings Regulation 1995

Large Off-Road Diesel Statement of Principles 1996

Medium- and Heavy-Duty Gasoline Trucks 1995

Off-Road Recreational Vehicles Regulation 1994

Federal Emission Control Measures

Nationwide EPA regulations for source categories for which EPA has exclusive authority:

Non-Road Diesel Engine Emission Standards

Locomotives and Marine Compression-Ignition Engines

Nationwide EPA regulations for source categories for which ARB has more stringent 

control requirements:

Tier 2 Emission Standards for On-Road Motor Vehicles and Gasoline Sulfur Content Standards

Heavy-Duty Diesel Emission Standards and Diesel Fuel Sulfur Content Standards

Onboard Refueling Vapor Recovery

Consumer Solvent Products

Nationwide EPA regulations for source categories for which the District has more stringent 

control requirements:

Architectural and Industrial Maintenance Coatings

Automobile Refinish Coatings