2011 Periodic Emissions Inventory

for Ozone Precursors

for the

Maricopa County, Arizona, Eight-Hour Ozone Nonattainment Area

ADDENDUM

August 2015

2011 Periodic Emissions Inventory for Ozone Precursors

ADDENDUM

August 2015

Table of Contents

1. Background and Introduction ................................................................................................... 1

2. Availability of Additional Emission Reduction Credits (ERCs).............................................. 1

3. “Recasting” the 2011 Ozone Season-day Inventory for the Eight-Hour 

Ozone Nonattainment Area....................................................................................................... 2

3.1 Identifying an Alternative Time Period for the 2011 Ozone Season ................................ 2

3.2 Recalculating the 2011 Ozone Season-day Inventory....................................................... 3

3.2.1 Point and Area Sources........................................................................................... 3

3.2.2 Nonroad Mobile Sources ........................................................................................ 4

3.2.2.1 Source Categories Calculated Using the NONROAD Model ................... 4

3.2.2.2 Aircraft, Ground Support Equipment, and Auxiliary Power Units ........... 5

3.2.3 Onroad Mobile Sources .......................................................................................... 6

3.2.4 Biogenic Sources .................................................................................................... 6

3.3 Summary of the “Recasting” Exercise Using a June–August Ozone Season ................... 7

4. Summary of All Revisions to the 2011 Periodic Emissions Inventory

for Ozone Precursors............................................................................................................... 10

2011 Ozone Precursor Emissions Inventory 1 ADDENDUM: August 2015 

2011 Periodic Emissions Inventory for Ozone Precursors

ADDENDUM

August 2015

1. Background and Introduction

This addendum serves as a supplement to the 2011 Periodic Emissions Inventory for Ozone Precursors 

for the Maricopa County, Arizona, Eight-Hour Ozone Nonattainment Area, published in February 

2014, and included as part of the MAG 2014 Eight-Hour Ozone Plan – Submittal of Marginal Area 

Requirements for the Maricopa Nonattainment Area submitted to EPA in June 2014. This document 

has been developed by the Maricopa County Air Quality Department (MCAQD) for two purposes:

• It adds a facility to the list of available Emission Reduction Credits (ERCs) in the Arizona 

Emissions Bank.

• In response to inquiries from EPA staff, it provides a “recasting” of the emissions calculations to 

develop an ozone season-day inventory reflecting the June–August 2011 period (vs. July–

September addressed in the original Periodic Emissions Inventory [PEI] report).

Each of the above points is discussed in further detail below. Where applicable, the changes that affect 

(annual and/or season-day) emissions estimates for a particular source category are provided in 

summary tables. This Addendum concludes with a detailed table summarizing emissions for the eighthour ozone nonattainment area (NAA), revised to reflect the two analyses described above.

Note that shaded cells in the tables below indicate emissions values that have been revised from the 

original PEI report. Where applicable, table and page numbers from the originally published 2011 

Periodic Emissions Inventory document published in February 2014 are noted parenthetically in the 

table captions.

2. Availability of Additional Emission Reduction Credits (ERCs)

Since the original publication of the 2011 Periodic Emissions Inventory for Ozone Precursors in 

February 2014, additional emissions reduction credits (ERCs) have been added to the Arizona 

Emissions Bank. Penn Racquet Sports, a sports-ball manufacturing facility located within the eighthour ozone nonattainment area, closed permanently in 2009, and its ERCs have been added to the 

Arizona Emissions Bank. Table A1 below lists the currently available emission reduction credits, 

while Table A2 provides updated annual and ozone season-day emissions estimates for the eight-hour 

ozone nonattainment area.

These newly available ERCs have also been incorporated into the base-year and future-year emissions 

inventories used by the Maricopa Association of Governments (MAG) for the modeling exercises 

conducted in developing the moderate-area ozone State Implementation Plan (SIP).
2011 Ozone Precursor Emissions Inventory 2 ADDENDUM: August 2015 

Table A1. Emission reduction credits as of December 31, 2011. (cf. original Table 2.5–1, p. 14)

Facility/ Current Owner

Emission reduction credits (tons/yr)

Reduction Date VOC NOx CO

Freescale Semiconductor, Inc. 3/1/2004 17.1 9.8 15.3

Grey K Envl Fund LP 12/11/2006 80.0

Woodstuff Manufacturing 11/30/2007 17.6

Penn Racquet Sports Inc. 3/06/2009 98.33 4.34

TOTAL: 213.03 14.14 15.3

As in the original 2011 PEI report, season-day emissions from ERCs have been estimated by dividing 

annual totals by 365, as these are presumed equally distributed throughout the year. Table A2 provides 

a summary of point source emissions for the eight-hour ozone nonattainment area, including emission 

reduction credits.

Table A2. Revised annual and season-day point source emissions for the eight-hour ozone nonattainment area, 

including emission reduction credits.

Annual (tons/yr) Season-day emissions (lbs/day)

Source Category VOC NOx CO VOC NOx CO

Point Sources 653.84 1,744.32 1,063.18 4,279.8 15,353.4 9,632.0

Emission Reduction Credits 213.03 14.14 15.30 1,167.3 77.5 83.8

Totals: 866.87 1,758.46 1,078.48 5,447.1 15,430.9 9,715.8

3. “Recasting” the 2011 Ozone Season-day Inventory for the Eight-Hour Ozone 

Nonattainment Area

3.1 Identifying an Alternative Time Period for the 2011 Ozone Season 

For this exercise, MCAQD and MAG revisited the 2011 Periodic Emissions Inventory (PEI) originally 

prepared in 2014, to investigate if there were any significant differences in ozone season-day emissions 

when considering an ozone season different from the July–September period defined in the original 

2011 PEI. To identify an alternative period deemed more representative of the actual ozone season,

calendar year 2011 data on average and maximum Air Quality Index (AQI) values, as well as 

information on the incidence of ozone exceedances, were analyzed. The base data is shown below in 

Table A3.

Table A3. Average and maximum AQI values, and frequency of ozone exceedances in 2011, by month.

Month

Average Daily

AQI Value

Maximum

AQI Value

Number of 

Exceedances

February 42 49 0

March 48 61 0

April 63 100 0

May 70 122 2

June 85 142 9

July 69 122 2

August 70 122 4

September 60 119 1

October 44 64 0
2011 Ozone Precursor Emissions Inventory 3 ADDENDUM: August 2015 

From the above information, three-month rolling averages were calculated for each parameter, in order 

to identify the most representative three-month period for the ozone season. Results are shown in 

Table A4; maximum values in each column are shown in bold.

Table A4. Three-month rolling averages of monthly AQI and exceedance data for 2011. 

Three-month

period

Average Daily

AQI Value

Maximum

AQI Value

Average Number

of Exceedances

Percentage of All 

2011 Exceedances

February–April 51.09 70.00 0.0 0%

March–May 60.36 94.33 0.67 11%

April–June 72.52 121.33 3.67 61%

May–July 74.39 128.67 4.33 72%

June–August 74.44 128.67 5.0 83%

July–September 66.10 121.00 2.33 39%

August–October 57.94 101.67 1.67 28%

The above table indicates that the rolling three-month average for each of the parameters analyzed 

reaches its maximum value for the June through August time period. Thus, this time period is 

considered representative of the 2011 ozone season for the Phoenix area, and used in this “recasting” 

exercise to assess the impact of redefining the ozone season on overall emissions in the 2011 PEI.

3.2 Recalculating the 2011 Ozone Season-day Inventory 

Each source category contained in the original 2011 ozone precursor emissions inventory was 

reviewed, and season-day emissions re-calculated where needed, depending on the methodology used 

to derive the original emissions estimates for that source category. The derivation of the “recast”

emissions values for each source category type are described in more detail below. At the end of this 

section, Table A16 presents a comparison of season-day emissions for each source category, including 

the values contained in the original 2011 PEI report (for the July–September period), as well as the 

“recast” emissions reflecting the three-month period covering June through August.

3.2.1 Point and Area Sources

When analyzing season-day emissions calculations for the recasting exercise, each point and nonpoint 

(area) source type could be classified into one of the following categories:

• Sources whose emissions were derived from actual activity data for the June–August time 

period; thus whose emissions remain unchanged. All reported point source activity falls into 

this classification, as did those area source categories (e.g., bakeries, graphic arts) which had 

been estimated directly based on data from individual facility surveys, which were then

“grown” by overall employment for that sector.

• Sources whose activity (and thus emissions) were assumed to be evenly distributed 

throughout the year, thus whose emissions remain unchanged. Examples include commercial 

cooking and consumer solvent use.

• Some emission categories (e.g., residential combustion of wood, LPG, and kerosene) were 

assumed to have no summertime activity (at any time between May and September), thus 

ozone season-day emissions for these source categories remained zero.
2011 Ozone Precursor Emissions Inventory 4 ADDENDUM: August 2015 

• Several source categories were estimated using published EPA guidance and recommended 

"seasonal activity factors" to derive season-day emissions from annual estimates; thus overall 

emissions estimates remained the same.

• One category, prescribed fires, had no reported activity in either June or September, thus the 

reported emissions for the ozone season (reflecting burns conducted in July and August) 

remained the same.

For the remaining categories, adjustments were made to recalculate the ozone-season emissions for the 

June–August period. For the following area source categories, monthly data was used to estimate 

season-day emissions in both the original PEI report, as well as this Addendum:

• Agricultural pesticides

• Gas stations Stage I: Submerged fill

• Gas stations Stage I: Bal. submerged fill

• Underground tanks: Breathing/emptying

• Truck: gasoline (tank trucks in transit)

• Accidental releases

• Wildfires

3.2.2 Nonroad Mobile Sources

3.2.2.1 Source Categories Calculated Using the NONROAD Model

Annual and monthly emissions for nonroad mobile source categories except locomotives, aircraft, 

airport ground support equipment (GSE) and auxiliary power units (APU), were developed using 

NONROAD2008a for the 2011 PEI report. For this Addendum, monthly nonroad mobile source

emissions for June, July, and August 2011 were extracted from the NONROAD2008a outputs which 

had been generated for the original 2011 PEI. Table A5 below provides monthly emissions within the 

eight-hour ozone nonattainment area for each major nonroad source category calculated by the model. 

Season-day emissions were then calculated using activity allocation factors (as described in Section 4.1

of the original 2011 Ozone Precursor PEI report ). Lawn and garden equipment total emissions were 

calculated by summing the residential and commercial lawn and garden equipment categories. Seasonday emissions for the period of June through August 2011 are provided in Table A6.

Table A5. Monthly nonroad mobile source emissions in the eight-hour ozone nonattainment area for the period 

June–August, 2011 (in tons/month).

Nonroad Source Category

VOC NOx CO

June July August June July August June July August

Agricultural Equipment 2.58 2.63 2.61 21.84 21.83 21.83 20.46 20.45 20.50

Commercial Equipment 186.38 198.89 192.66 108.13 107.74 107.24 2,643.99 2,640.97 2,652.57

Construction /mining Equipment 180.11 182.14 180.91 1,211.17 1,211.08 1,210.96 1,380.06 1,377.79 1,379.73

Industrial Equipment 28.68 28.81 28.69 152.37 152.34 152.30 598.34 598.26 598.63

Lawn & Garden (Residential) 382.25 419.43 411.33 31.24 30.82 30.27 3,277.43 3,272.49 3,286.46

Lawn & Garden (Commercial) 180.11 181.47 180.97 56.86 56.55 56.13 2,932.22 2,924.99 2,934.99

Logging Equipment 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Pleasure Craft 78.61 82.85 83.82 14.97 15.01 14.97 203.49 201.52 200.94

Railroad Equipment 0.17 0.18 0.17 0.72 0.72 0.72 1.44 1.44 1.44

Recreational Equipment 85.10 87.32 86.58 3.35 3.32 3.28 366.35 365.14 366.14
2011 Ozone Precursor Emissions Inventory 5 ADDENDUM: August 2015 

Table A6. Ozone season-day emissions from nonroad mobile sources in the eight-hour ozone nonattainment area for 

the period June–August, 2011.

Season-day Emissions (lbs/day)

Nonroad Source Category VOC NOx CO

Agricultural Equipment 200.6 1,679.5 1,574.6

Commercial Equipment 14,818.6 8,284.7 203,526.4

Construction and Mining Equipment 13,927.2 93,159.3 106,091.9

Industrial Equipment 2,209.9 11,718.2 46,031.6

Lawn and Garden Equipment (Total) 54,825.3 7,329.9 552,709.8

Logging Equipment 0.0 0.0 0.0

Pleasure Craft 13,207.4 2,420.5 32,628.3

Railway Maintenance Equipment 14.5 59.7 119.5

Recreational Equipment 8,855.0 339.9 37,525.9

3.2.2.2 Aircraft, Ground Support Equipment, and Auxiliary Power Units

Emissions from aircraft, ground support equipment (GSE), and auxiliary power units (APUs) for the 

period of June through August 2011 were calculated by applying adjustment factors to the emission

estimates prepared for the original 2011 PEI report, covering the period of July through September 

2011. These adjustment factors for airports have been developed by dividing the number of operations 

for the June–August timeframe, by the number of operations within the July–September period 

covered by the initial model calculations, for each of four aircraft categories (air carrier, air taxi, 

general aviation, and military). Monthly airport operational data were obtained from the Federal 

Aviation Administration (FAA) Air Traffic Activity Data System (ATADS) database for the year 

2011, and from MAG 2009 airport survey data. The total operations for airports for the two periods 

are presented in Table A7. The season-day emissions for aircrafts, GSE, and APUs for the eight-hour 

ozone nonattainment area for the period of June through August 2011 developed using the adjustment 

factors are provided in Table A8.

Table A7. Total operations for two three-month time periods in 2011 (June–August, and July–September) for 

airports within the eight-hour ozone nonattainment area. 

Count of Total Operations Over a Three-Month Period, by Aircraft Category

Air Carrier Air Taxi General Aviation Military

Airport Jun-Aug Jul-Sep Jun-Aug Jul-Sep Jun-Aug Jul-Sep Jun-Aug Jul-Sep

Buckeye Municipal 0 0 0 0 12,421 12,008 0 0

Chandler Municipal 0 6 532 553 36,210 37,001 389 388

Falcon Field 0 3 696 656 48,426 47,073 547 629

Gila Bend Municipal 0 0 0 0 833 806 0 0

Glendale Municipal 0 0 240 220 19,613 20,904 14 8

Luke Air Force Base 0 0 0 0 0 0 21,082 20,794

Phoenix Deer Valley 0 0 828 796 77,787 84,991 24 61

Phoenix Goodyear 29 29 83 65 33,302 33,437 1,611 1,944

Phoenix Sky Harbor 95,534 92,717 16,326 16,484 4,398 4,536 585 505

Phoenix-Mesa Gateway 2,082 1,974 2,317 2,196 31,047 31,686 1,198 1,326

Pleasant Valley 0 0 0 0 1,503 1,503 0 0

Scottsdale 0 0 2,459 2,584 27,027 28,111 107 139

Sky Ranch at Carefree 0 0 0 0 448 432 0 0

Stellar Airpark 0 0 0 0 9,153 8,849 0 0

Table A8. Ozone season-day emissions from aircraft, ground support equipment, and auxiliary power units in the

eight-hour ozone nonattainment area for the period June–August, 2011.

Ozone Season-day Emissions (lbs/day)

Nonroad Source Category VOC NOx CO

Aircraft 8,355.4 12,789.2 63,737.5

GSE & APU 590.0 2,155.7 17,236.5
2011 Ozone Precursor Emissions Inventory 6 ADDENDUM: August 2015 

3.2.3 Onroad Mobile Sources

MOVES2010b was used to generate monthly onroad mobile source emissions for vehicle classes, 

facility types, weekdays and weekend for the 2011 Periodic Emissions Inventory (PEI) for ozone 

precursors. Monthly onroad mobile source emissions in the eight-hour ozone nonattainment area for 

June through August were obtained from the MOVES2010b output database developed for the original 

2011 PEI; results are shown in Table A9 below. To calculate the average daily emissions for the 

period, the three-month total onroad emissions were divided by 92 (the total number of days in the 

three-month period) as shown in Table A10.

Table A9. Monthly emissions from onroad mobile sources in the eight-hour ozone nonattainment area for the 

period June–August, 2011.

Onroad Mobile Source Emissions (lbs/month)

VOC NOx CO

June 4,283,659.6 10,160,425.4 38,461,716.3

July 4,528,226.8 9,006,439.8 39,909,804.7

August 4,739,641.7 9,267,486.0 42,238,005.8

Total 13,551,528.1 28,434,351.2 120,609,526.8

Table A10. Average season-day emissions from onroad mobile sources in the eight-hour ozone nonattainment area 

for the period June–August, 2011.

Average Season-day Emissions (lbs/day)

Source Category VOC NOx CO

Onroad Mobile Sources 147,299.2 309,069.0 1,310,973.1

3.2.4 Biogenic Sources

Daily mean biogenic emissions for June, July, and August 2011 were obtained from Table 6.4–1 in the 

2011 ozone precursor PEI report (and reproduced below in Table A11). The three-month daily means

were then averaged to derive season-day biogenic emissions values, as shown in Table A12.

Table A11. Daily mean emissions from biogenic sources in the eight-hour ozone nonattainment area for the period 

June–August, 2011.

Daily Mean Biogenic Emissions (lbs/day)

VOC NOx CO

June 690,104.5 5,089.1 61,726.7

July 693,725.6 6,294.2 66,100.2

August 720,330.5 7,529.4 71,775.8

Table A12. Average season-day emissions from biogenic sources in the eight-hour ozone nonattainment area for the 

period June–August, 2011.

Average Season-day Emissions (lbs/day)

Source Category VOC NOx CO

Biogenic Sources 701,386.9 6,304.2 66,534.2
2011 Ozone Precursor Emissions Inventory 7 ADDENDUM: August 2015 

3.3 Summary of the “Recasting” Exercise Using a June–August Ozone Season

The tables below compare the original ozone season-day emissions inventory for the eight-hour ozone 

nonattainment area, with the revised season-day totals that incorporate the revised season-day 

emissions calculations described in Section 3.2 above. Table A13 compares overall season-day 

emissions for the eight-hour nonattainment area, broken out by major source category.

Table A13. Comparison of ozone season-day emissions in the eight-hour ozone nonattainment area from the 

original 2011 PEI report vs. the “recast” inventory, by major source category.

Ozone Season-day Emissions (lbs/day)

As In Original PEI Report

(July–September ozone season)

“Recast” Inventory

(June–August ozone season)

Source Category VOC NOx CO VOC NOx CO

Point Sources 4,908 15,407 9,716 4,908 15,407 9,715

Nonpoint (Area) Sources 227,857 31,820 292,321 228,322 32,043 302,710

Nonroad Mobile Sources 111,797 141,444 1,025,618 117,279 144,874 1,061,973

Onroad Mobile Sources 148,186 301,824 1,321,680 147,299 309,069 1,310,973

Biogenic Sources 624,395 6,232 62,584 701,387 6,304 66,534

Total, all source categories 1,117,143 496,727 2,711,919 1,199,195 507,698 2,751,955

The two tables below summarize the changes in emissions that result from redefining the ozone season 

as the June–August time period. Table A14 presents the absolute emission changes (both increases 

and decreases), while Table A15 presents these changes in percentage terms. Both tables indicate that 

the net change in anthropogenic emissions that results from a revised definition of an “ozone season” 

to June–August is insignificant (i.e., slightly less than 1% of the overall inventory). Finally, Table A16 

presents a detailed, line-item comparison of the season-day inventory presented in the original PEI 

report, vs the recast version incorporating the revised emissions calculated described above. 

Table A14. Absolute change in ozone season-day emissions in the eight-hour ozone nonattainment area between the 

original 2011 PEI report (reflecting a July–September ozone season) and the “recast” inventory (reflecting June–

August), by major source category.

Change in Season-day Emissions (lbs/day)

Source Category VOC NOx CO

Point Sources 0 0 0

Nonpoint (Area) Sources +465 +223 +10,389

Nonroad Mobile Sources +5,482 +3,431 +36,404

Onroad Mobile Sources –887 +7,245 –10,707

Biogenic Sources +76,992 +73 +3,950

Net change, all source categories +82,052 +10,971 +40,037

Net change, anthropogenic sources only

(excluding wildfires and biogenic sources) +4,571 +10,676 +25,697

Table A15. Percentage change in ozone season-day emissions in the eight-hour ozone nonattainment area between 

the original 2011 PEI report (reflecting a July–September ozone season) and the “recast” inventory (reflecting 

June–August), by major source category.

Change in Season-day Emissions (%)

Source Category VOC NOx CO

Point Sources 0.00% 0.00% 0.00%

Nonpoint (Area) Sources +0.20% +0.70% +3.55%

Nonroad Mobile Sources +4.90% +2.43% +3.55%

Onroad Mobile Sources –0.60% +2.40% –0.81%

Biogenic Sources +12.33% +1.16% +6.31%

Net change, all source categories +7.34% +2.21% +1.48%

Net change, anthropogenic sources only

(excluding wildfires and biogenic sources) +0.41% +2.15% +0.95%
2011 Ozone Precursor Emissions Inventory 8 ADDENDUM: August 2015 

Table A16. Ozone season-day emissions from all source categories in the eight-hour ozone nonattainment area, 

comparing the original 2011 PEI report (reflecting a July–September ozone season) and the “recast” inventory 

(reflecting June–August), by major source category. Shaded cells indicate revised emission values.

Original PEI

(July–Sept., in lbs/day)

“Recast” ozone season

(June–August, in lbs/day)

Source Category VOC NOx CO VOC NOx CO

POINT SOURCES1 4,279.8 15,353.4 9,632.0 4,279.8 15,353.4 9,632.0

Emission Reduction Credits2 (unchanged) 628.5 53.7 83.8 628.5 53.7 83.8

Total, All Point Sources: 4,908.3 15,407.1 9,715.8 4,908.3 15,407.1 9,715.8

AREA SOURCES:

Fuel combustion:

Industrial distillate oil: Boilers2 3.9 388.5 97.1 3.9 388.5 97.1

Industrial distillate oil: Engines2 0.0 11,733.0 2,525.3 0.0 11,733.0 2,525.3

Industrial natural gas1 216.9 4,285.3 2,669.3 216.9 4,285.3 2,669.3

Comm./inst. distillate oil: Boilers2 0.0 0.8 0.2 0.0 0.8 0.2

Comm./inst. distillate oil: Engines2 0.0 23.7 5.1 0.0 23.7 5.1

Comm./inst. natural gas1 251.7 4,992.0 3,061.7 251.7 4,992.0 3,061.7

Residential distillate oil3 0 0 0 0 0 0

Residential natural gas1 120.5 2,060.1 876.7 120.5 2,060.1 876.7

Residential LPG3 0 0 0 0 0 0

Residential wood combustion3 0 0 0 0 0 0

Residential kerosene3 0 0 0 0 0 0

All Fuel Combustion: 593.0 23,483.5 9,235.4 593.0 23,483.5 9,235.4

Industrial processes:

Chemical manufacturing1 596.5 596.5

Commercial cooking2 829.8 2,181.7 829.8 2,181.7

Bakeries1 545.4 545.4

Secondary metal production1 306.4 107.9 697.4 306.4 107.9 697.4

Rubber/plastic product manufacturing1 14,110.1 14,110.1

Electrical equipment manufacturing1 746.2 135.8 16.4 746.2 135.8 16.4

Industrial processes, NEC1 318.0 1,245.8 525.2 318.0 1,245.8 525.2

All Industrial Processes: 17,452.4 1,489.5 3,420.8 17,452.4 1,489.5 3,420.8

Solvent use:

Architectural coatings4 30,973.1 30,973.1

Auto refinishing2 10,211.8 10,211.8

Traffic markings4 1,737.5 1,737.5

Factory finished wood1 1,390.7 1,390.7

Wood furniture1 3,419.9 3,419.9

Aircraft surface coating1 473.1 473.1

Miscellaneous surface coating1 2,440.0 2,440.0

Degreasing1 1,445.1 1,445.1

Dry cleaning2 180.1 180.1

Graphics arts1 2,216.1 2,216.1

Miscellaneous industrial solvent use1 5,104.6 5,104.6

Consumer and commercial products2 96,468.5 96,468.5

Cutback asphalt2 4,309.9 4,309.9

Emulsified asphalt2 4,465.8 4,465.8

Roofing asphalt2 23.7 23.7

Agricultural pesticides 1,697.5 1,697.3

All Solvent Use: 166,557.4 166,557.2

1 = No change; season-day emissions are based on June–August activity data reported by sources. 2 = No change; activity is assumed evenly distributed throughout the year. 3 = No change; no activity assumed to occur between May and September. 4 = No change; season-day emissions were estimated using EPA guidance and seasonal activity factor. 5 = No change; no activity reported in June or September. 6 = No change; activity is accounted for as part of mobile source emission calculations.
2011 Ozone Precursor Emissions Inventory 9 ADDENDUM: August 2015 

Table A16 (continued). Ozone season-day emissions from all source categories in the eight-hour ozone nonattainment area, comparing the original 2011 PEI report (reflecting a July–September ozone season) and the 

“recast” inventory (reflecting June–August), by major source category. Shaded cells indicate revised emission 

values.

Original PEI

(July–Sept., in lbs/day)

“Recast” ozone season

(June–August, in lbs/day)

Source Category VOC NOx CO VOC NOx CO

Storage/transport:

Residential portable gas cans2 16,311.4 16,311.4

Commercial portable gas cans2 3,136.7 3,136.7

Bulk plants1 659.3 659.3

Gas stations Stage I: Submerged fill 528.7 526.9

Gas stations Stage I: Bal. submerged fill 1,426.8 1,421.9

Gas stations Stage II6 0 0

Underground tanks: Breathing/emptying 4,138.6 4,124.4

Airports: aviation gasoline Stage I2 1,887.2 1,887.2

Airports: aviation gasoline Stage II2 97.9 97.9

Truck: gasoline (tank trucks in transit) 315.8 314.7

Pipeline gasoline2 94.5 94.5

Volatile organic liquids storage/transport1 169.3 169.3

All Storage/Transport: 28,766.2 28,744.2

Waste treatment/disposal:

On-site incineration1 1.1 21.4 5.3 1.1 21.4 5.3

Open burning: Land clearing debris2 9.1 4.1 86.4 9.1 4.1 86.4

Landfills1 200.7 167.4 596.4 200.7 167.4 596.4

Publicly owned treatment works4 583.7 583.7

Leaking underground storage tanks2 32.3 32.3

Other waste1 10.9 122.8 431.4 10.9 122.8 431.4

All Waste Treatment/Disposal: 837.8 315.6 1,119.6 837.8 315.6 1,119.6

Misc. area sources:

Agricultural field burning2 470.2 209.0 4,440.7 470.2 209.0 4,440.7

Structure fires4 73.3 9.3 399.7 73.3 9.3 399.7

Aircraft engine testing1 26.1 259.3 91.2 26.1 259.3 91.2

Vehicle fires2 51.4 6.4 200.8 51.4 6.4 200.8

Crematories1 50.9 88.1 17.2 50.9 88.1 17.2

Accidental releases 2.1 0.0 0.0 0.6 0.0 0.0

Hospitals1 52.9 52.9

Wildfires 12,794.0 5,832.6 271,872.2 13,282.9 6,055.4 282,261.6

Prescribed fires5 129.2 127.1 1,523.2 129.2 127.1 1,523.2

All Misc. Area Sources: 13,650 6,532 278,545 14,137.4 6,754.7 288,934.4

ALL AREA SOURCES: 227,856.8 31,820.5 292,320.7 228,322.0 32,043.4 302,710.1

NONROAD MOBILE SOURCES:

Agricultural equipment 192.5 1,615.1 1,510.9 200.6 1,679.5 1,574.6

Airport GSE & APUs 584.5 2,128.9 17,071.7 590.0 2,155.5 17,236.7

Commercial equipment 14,474.7 8,299.0 202,531.2 14,818.6 8,284.7 203,526.4

Construction & mining equipment 13,534.5 90,774.0 103,125.0 13,927.2 93,159.3 106,091.9

Industrial equipment 2,203.1 11,712.9 45,940.4 2,209.9 11,718.2 46,031.6

Lawn and garden equipment 52,584.9 7,078.4 529,218.9 54,825.3 7,329.9 552,709.8

Pleasure craft 11,527.0 1,996.8 26,738.3 13,207.4 2,420.5 32,628.3

Railway maintenance equipment 14.4 59.7 119.1 14.5 59.7 119.5

Recreational equipment 8,020.9 306.0 33,528.7 8,855.0 339.9 37,525.9

Aircraft 8,385.8 12,535.3 64,993.6 8,355.4 12,789.2 63,737.5

Locomotives2 274.8 4,937.7 839.9 274.8 4,937.7 839.9

ALL NONROAD MOBILE SOURCES: 111,797.1 141,443.8 1,025,617.7 117,278.7 144,874.4 1,062,022.0

ONROAD MOBILE SOURCES: 148,186.2 301,823.7 1,321,680.2 147,299.2 309,069.0 1,310,973.1

BIOGENIC SOURCES: 624,395.0 6,231.7 62,584.2 701,386.9 6,304.2 66,534.2

TOTAL, ALL SOURCE CATEGORIES: 1,117,143.4 496,726.7 2,711,918.6 1,199,195.0 507,698.0 2,751,955.2
2011 Ozone Precursor Emissions Inventory 10 ADDENDUM: August 2015 

4. Summary of All Revisions to the 2011 Periodic Emissions Inventory for Ozone 

Precursors

Table A17 below reflects all revisions made (to both annual and season-day emission calculations)

resulting from the two sets of changes described in this Addendum, namely: (1) the inclusion of 

additional Emission Reduction Credits and (2) the “recasting” of ozone season-day emissions to reflect 

the three-month period from June–August 2011 (vs. July–September in the original publication).

Table A17. Revised annual and season-day emissions from all sources in the eight-hour ozone nonattainment area. 

(cf. Table 1.6–9, pp. 9–10). Shaded cells indicate revised values vs. the original 2011 PEI report. 

Annual emissions (tons/year) Season-day emissions (lbs/day)

Source Category VOC NOx CO VOC NOx CO

POINT SOURCES: 653.84 1,744.32 1,063.18 4,279.8 15,353.4 9,632.0

Emission Reduction Credits 213.03 14.14 15.30 1,167.3 77.5 83.8

Total, All Point Sources: 866.87 1,758.46 1,078.48 5,447.1 15,430.9 9,715.8

AREA SOURCES:

Fuel combustion:

Industrial distillate oil: Boilers 0.61 60.61 15.15 3.9 388.5 97.1

Industrial distillate oil: Engines 0.00 1,830.35 393.95 0.0 11,733.0 2,525.3

Industrial natural gas 36.83 727.80 453.34 216.9 4,285.3 2,669.3

Comm./inst. distillate oil: Boilers 0.00 0.12 0.03 0.0 0.8 0.2

Comm./inst. distillate oil: Engines 0.00 3.70 0.80 0.0 23.7 5.1

Comm./inst. natural gas 54.42 1,079.44 662.05 251.7 4,992.0 3,061.7

Residential distillate oil 0.01 0.35 0.10 0.0 0.0 0.0

Residential natural gas 50.20 857.96 365.09 120.5 2,060.1 876.7

Residential LPG 2.02 51.93 14.73 0.0 0.0 0.0

Residential wood combustion 515.53 58.38 2,993.75 0.0 0.0 0.0

Residential kerosene 0.00 0.03 0.01 0.0 0.0 0.0

All Fuel Combustion: 659.63 4,670.68 4,898.99 593.0 23,483.5 9,235.4

Industrial processes:

Chemical manufacturing 77.09 596.5

Commercial cooking 151.03 397.07 829.8 2,181.7

Bakeries 77.85 545.4

Secondary metal production 41.01 15.02 98.36 306.4 107.9 697.4

Rubber/plastic product manufacturing 1,759.15 14,110.1

Electrical equipment manufacturing 122.80 23.47 2.98 746.2 135.8 16.4

Industrial processes, NEC 47.55 224.92 91.84 318.0 1,245.8 525.2

All Industrial Processes: 2,276.48 263.41 590.27 17,452.4 1,489.5 3,420.8

Solvent use:

Architectural coatings 5,033.13 30,973.1

Auto refinishing 1,327.53 10,211.8

Traffic markings 171.12 1,737.5

Factory finished wood 137.12 1,390.7

Wood furniture 414.77 3,419.9

Aircraft surface coating 65.84 473.1

Miscellaneous surface coating 315.02 2,440.0

Degreasing 216.62 1,445.1

Dry cleaning 23.42 180.1

Graphics arts 289.73 2,216.1

Miscellaneous industrial solvent use 718.75 5,104.6

Consumer and commercial products 17,605.51 96,468.5

Cutback asphalt 788.72 4,309.9

Emulsified asphalt 817.24 4,465.8

Roofing asphalt 3.08 23.7

Agricultural pesticides 212.18 1,697.3

All Solvent Use: 28,139.77 166,557.2
2011 Ozone Precursor Emissions Inventory 11 ADDENDUM: August 2015 

Table A17 (continued). Revised annual and season-day emissions from all sources in the eight-hour ozone 

nonattainment area.

Annual emissions (tons/year) Season-day emissions (lbs/day)

Source Category VOC NOx CO VOC NOx CO

Storage/transport:

Residential portable gas cans 2,968.67 16,311.4

Commercial portable gas cans 570.89 3,136.7

Bulk plants 120.91 659.3

Gas stations Stage I: Submerged fill 85.08 526.9

Gas stations Stage I: Bal. submerged fill 229.60 1,421.9

Gas stations Stage II 0.00 0.0

Underground tanks: Breathing/emptying 777.00 4,124.4

Airports: aviation gasoline Stage I 344.41 1,887.2

Airports: aviation gasoline Stage II 17.87 97.9

Truck: gasoline (tank trucks in transit) 50.82 314.7

Pipeline gasoline 17.32 94.5

Volatile organic liquids storage/transport 28.80 169.3

All Storage/Transport: 5,211.35 28,744.2

Waste treatment/disposal:

On-site incineration 0.17 3.31 0.79 1.1 21.4 5.3

Open burning: Land clearing debris 0.30 0.13 2.81 9.1 4.1 86.4

Landfills 36.59 30.40 108.55 200.7 167.4 596.4

Publicly owned treatment works 75.88 583.7

Leaking underground storage tanks 1.05 32.3

Other waste 2.12 22.19 77.93 10.9 122.8 431.4

All Waste Treatment/Disposal: 116.10 56.04 190.06 837.8 315.6 1,119.6

Miscellaneous area sources:

Agricultural field burning 15.28 6.79 144.32 470.2 209.0 4,440.7

Structure fires 14.95 1.90 81.55 73.3 9.3 399.7

Aircraft engine testing 4.72 46.36 16.16 26.1 259.3 91.2

Vehicle fires 9.38 1.17 36.64 51.4 6.4 200.8

Crematories 1.18 11.14 2.22 50.9 88.1 17.2

Accidental releases 0.45 0.00 0.00 0.6 0.0 0.0

Hospitals 8.66 52.9

Wildfires 206.08 93.95 4,379.28 13,282.9 6,055.4 282,261.6

Prescribed fires 0.39 0.38 4.54 129.2 127.1 1,523.2

All Miscellaneous Area Sources: 261.09 161.70 4,664.71 14,137.4 6,754.7 288,934.4

ALL AREA SOURCES: 36,664.42 5,151.83 10,344.03 228,322.0 32,043.4 302,710.1

NONROAD MOBILE SOURCES:

Agricultural equipment 22.52 193.22 177.56 200.6 1,679.5 1,574.6

Airport GSE (+APU) 111.43 404.49 3,259.08 590.0 2,155.7 17,236.5

Commercial equipment 1,916.15 1,355.57 30,094.46 14,818.6 8,284.7 203,526.4

Construction & mining equipment 1,941.80 13,349.23 14,855.32 13,927.2 93,159.3 106,091.9

Industrial equipment 339.78 1,831.45 7,110.33 2,209.9 11,718.2 46,031.6

Lawn and garden equipment 4,970.15 876.55 55,425.05 54,825.3 7,329.9 552,709.8

Pleasure craft 530.39 96.56 1,249.66 13,207.4 2,420.5 32,628.3

Railway maintenance equipment 1.96 8.64 16.67 14.5 59.7 119.5

Recreational equipment 684.30 29.78 2,871.27 8,855.0 339.9 37,525.9

Aircraft 1,705.43 2,585.98 11,719.36 8,355.4 12,789.2 63,737.5

Locomotives 50.15 901.12 153.29 274.8 4,937.7 839.9

ALL NONROAD MOBILE SOURCES: 12,274.06 21,632.59 126,932.05 117,278.7 144,874.4 1,062,022.0

ONROAD MOBILE SOURCES: 24,110.04 56,861.82 226,581.20 147,299.2 309,069.0 1,310,973.1

BIOGENIC SOURCES: 55,311.84 527.18 5,934.55 701,386.9 6,304.2 66,534.2

TOTAL, ALLSOURCE CATEGORIES: 129,277.24 85,931.88 370,870.31 1,199,733.8 507,721.8 2,751,955.2