# CHAPTER 3

BASE YEAR AND FUTURE EMISSIONS

Introduction

Emissions Inventories

Base Year Emissions

Future Emissions

### Chapter 3 Base Year and Future Emissions

3

- 1 

## INTRODUCTION

This chapter summarizes emissions occurring in the Basin during the base years 1987,

1990, and 1993, and projected emissions in t he years 2000, 2006, 2010. More detailed

emission data analyses are presented in Appendix III of the 1997 AQMP. Additional

emission inventories for other interim years (i.e., 1997, 1999, 2002, 2003, 2005, 2007,

2008) are also developed. These inventory years are selected to comply with federal and

state Clean Air Act requirements. Under the federal and state Clean Air Acts, the

District is required to report the Basin’s emission reduction progress for nonattainment

pollutants. The base year to measure the Basin’s progress is 1990 for both the federal

and state Clean Air Acts. A 1987 and a 1990 emission inventory were reconstructed to

reflect the most recent inventory methodologies. Adopted air quality rules and

regulations have current and future compliance dates. The 1993 base year emissions

inventory reflects adopted air regulations with current compliance dates; whereas future

baseline emissions inventories are based on adopted air regulations with both current and

future compliance dates. A list of District rules and regulations that are part of the base

year and future

- year baseline emissions inventories is presented in Appendix III. Some

of these rules have not been approved by U.S. EPA, however the District is committed to

implement these rules that are incorporated in the 1997 AQMP baseline emissions

inventories.

The emissions inventory is divided into four major classifications: point, area, off

- road,

and on

- road sources. The 1993 base year point source emissions are based principally on

r eported data from facilities. The area source and off

- road emissions are estimated

jointly by ARB and the District. The on

- road emissions are calculated using the ARB

EMFAC7G emission factors and the transportation activity data provided by SCAG. The

1987 and 1990 inventories were reconstructed/backcasted based on the same general

methodology as the 1993 inventory so as to reflect current knowledge. For example,

EMFAC7G was applied to the 1987 and 1990 vehicle activity data to backcast 1987 and

1990 on

- road mobile emissions. This approach provides a more consistent basis for

evaluation of emission reduction progress.

The future emission forecasts are based on demographic and economic growth

projections provided by the Southern California Association of Governments (SCAG).

The California Energy Commission (CEC) energy forecasts for the petroleum industry

and gas appliance

- related categories incorporating energy efficiency standards are also

used to refine emission projections. In addition, emission redu ctions resulting from ARB

and District regulations adopted by September 30, 1996 are included in the emission

forecasts. The rules and regulations adopted beginning in 1996 are treated as baseline

adjustment measures to account for their emissions impacts.

### FINAL 1997 AQMP

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- 2 

## EMISSIONS INVENTORIE S

Baseline emissions data presented in this chapter are based on average annual day

emissions (i.e., total annual emissions divided by 365 days) and seasonally adjusted

planning inventory emissions. The 1997 AQMP uses annual average day emissions to

estimate the cost

- effectiveness of a control measure, to rank control measure

implementation, and to perform PM 10 

### modeling and analysis. The planning inventory

emissions developed to capture the emission levels during the poor air quality season are

used to report emission reduction progress as required by the federal and state Clean Air

Acts. Three planning inventories are prepared for the 1997 AQMP: an ozone inventory

for summer volatile organic compounds (VOC) and oxides of nitrogen (NO

x ) emissions;

a carbon monoxide (CO) inventory for winter CO emissions; and a nitrogen dioxide

(NO 2 ) inventory for winter NO

x emissions. In addition, the most recent U.S. EPA VOC

definition (i.e., exclusion of acetone, ethane, and PERC) is applied for the purpose of

AQMP inventory development.

Detailed descriptions of the base year and future baseline emission inventories are

presented in Appendix III

- Base Year and Future Year Emission Inventories.



## Stationary Sources

Stationary sources can be divide d into two major subcategories: point and area sources.

Point sources are generally large emitters with one or more emission sources at a

permitted facility with an identified location (e.g., power plants, refinery boilers). Area

sources generally consist of many small emission sources (e.g., residential water heaters,

architectural coatings) which are distributed across the region. Their emissions over a

given area may be calculated using socioeconomic data. For 1987, reported data is used

for point so urces emitting more than 8 tons/year of any one of the criteria air

contaminants and the District's permit system data base is relied upon to estimate

emissions for smaller sources; for 1990 and 1993, reported data is used for facilities with

emissions greater than or equal to 2 tons/year.

Area source emissions were jointly developed by the ARB and the District for a total of

more than 200 categories. Several special studies were conducted to improve the area

source inventory. ARB has recently completed a statewide inventory for degreasing

operations identifying solvent cleaning emissions not previously inventoried. In

addition, the most recent source test data for restaurant operations (e.g., charbroiler and

deep fryers) was used for the 1997 Plan.

Finally, significant progress has been made since the adoption of the 1994 AQMP to

improve PM 10 

### fugitive dust and ammonia emission inventories. The following sections

### Chapter 3 Base Year and Future Emissions

3

- 3 summarize the progress and the results for a variety of projects related to emission

inventor y improvement.

Fugitive Dust and Ammonia Inventory Updates

As part of the 1994 AQMP process, it was recognized that the fugitive dust and ammonia

inventories should be reviewed and revised, if necessary, prior to the development of the

1997 AQMP. Since that time, the District has participated in a number of fugitive dust

and ammonia emission projects, as well as following projects by other sponsors. Based

on the results of these studies and more recent activity level information, the District has

prepared updated 1993 fugitive dust and ammonia emission inventories.

Best Available Control Measure (BACM) Working Group

The District, through the cooperative efforts of the BACM Working Group, embarked on

an accelerated program to correct previously identified fugitive dust inventory

deficiencies. The BACM Working Group is an ongoing task force comprised of

representatives from U.S. EPA Region IX, ARB, South Coast AQMD, San Joaquin

Valley APCD, Great Basin APCD, Mojave Desert AQMD, Clark County Nevada,

Washoe Co unty Nevada, Maricopa County Arizona, Arizona Department of

Environmental Quality, USDA Soil Conservation Service, Coachella Valley Association

of Governments, and WESTAR (Western States Air Resource Council). The emission

inventory projects included studies aimed at improving emission factors for such fugitive

dust sources as paved roads and construction, as well as quantifying previously

uninventoried sources. Emission factors for entrained paved road dust and construction

were significantly lower than previous estimates based on these studies. Previously

uninventoried sources, such as entrained leaf blower and unpaved shoulder dust, were

generally found to be small contributors to the overall inventory.

PM 10 

### Technical Enhancement Program (PTEP)

The results from three emission inventory projects from the District’s PM 10 

### Technical

Enhancement Program (PTEP) have been used to revise the fugitive dust and ammonia

inventories. The Fugitive Dust Integration project summarized previous inventory

development a nd current and past emission factor studies. It also provided

recommendations for the best available emission methodology, emission factors, and

activity estimates for each fugitive dust category. These recommendations were used by

District staff in the development of the fugitive dust inventory. A second PTEP project

was the development of a Geographic Information System (GIS) to prepare spatially

resolved fugitive dust inventories. Spatially

- resolved 1993 construction dust emissions

have been prepared for the 1997 AQMP.

A separate PTEP project measured emissions from livestock waste at local dairies, since

it was believed that current local dairy operations were significantly different than those

used to derive previous emission estimates. Results from this study indicated that the

### FINAL 1997 AQMP

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- 4

emission factor for local dairy waste was approximately 70% less than the factor used in

previous emission inventory estimates, since earlier studies were not based on local area

conditions.

Updated 1993 Fugitive Dust and Ammonia Inventories

Activity levels for all sources were updated to the 1993 base year, which reflects the

impact of the local economic activities as well as Rule 403 on construction emissions.

Overall, updated emission factors and activity levels for several categories led to a 54%

reduction in fugitive dust emission estimates. Figure 3

- 1 compares the changes in

fugitive dust inventories between 1994 and the 1997 Plans.

FIGURE 3

- 1

1993 Fugitive Dust Inventory for the 1994 AQMP and the 1997 AQMP

The 199 3 livestock waste ammonia inventory is approximately 50% less than the 1987

emission estimate used in previous plans. The reduction results from the reduced

emission factor for dairy livestock waste and the 1993 animal population statistics, which

showed a decrease in poultry from the 1987 levels. It should also be noted that previous

ammonia emission estimates for wastewater treatment plants were overstated compared

to the ammonia emissions reported in the AB 2588

- required Air Toxics Inventory Report

and from source testing. Based on this and other information, 1993 ammonia emission

estimates for wastewater treatment plants are now calculated to be 100 times smaller than

previous estimates.



## Mobile Sources

Mobile sources consist of two subcategories: on

- road and off

- road sources. On

- road

vehicle emissions are calculated using socioeconomic data and transportation models

### Chapter 3 Base Year and Future Emissions

3

- 5 provided by SCAG, spatial distribution data from Caltrans' Direct Travel Impact Model

(DTIM), and emission factors (EMFAC7G) obtained fro m the ARB. The 1990 Census

data is reflected in the SCAG socioeconomic data, and the 1991 origin and designation

survey data is used in the SCAG transportation model. Major improvements made to

EMFAC7G include:

 Redefining starts and redistributing starts by vehicle age;

 New start emissions methodology;

 Fuel corrections for diesel;

 High emitter adjustments;

 Driving cycle adjustments; and

 Implementation of adopted rules (e.g., enhanced inspection and maintenance

program, 4.0 gram NO

x 

### standards for heavy

- dut y diesel trucks and urban diesel

buses, and 2.5 gram NO

x 

### standard for heavy

- duty gas trucks).

Based on the vehicle activity data and EMFAC, an upgraded DTIM model (i.e., DTIM2)

is used to estimate on

- road mobile emissions. Figure 3

- 2 compares the on

- road

emissions between EMFAC7F and EMFAC7G.

Emissions from off

- road vehicle categories (e.g., trains, ships, utility engines) were

developed primarily based on the estimated activity levels and emission factors. A

special study was conducted by ARB to improv e the emission estimates for pleasure

craft. A separate study to inventory ship emissions was recently completed and the

emission estimates from that study have been incorporated into the 1997 AQMP



## Gridded Emissions

For air quality modeling purposes, the region is composed of the South Coast Air Basin,

Coachella Valley, Antelope Valley, Ventura County (upwind area), and Mojave Desert.

The modeling area is divided into a grid system composed of 5 km by 5 km grid cells

defined by Universal Transverse Mercat or (UTM) coordinates. Both stationary and

mobile emissions are allocated to individual grid cells within this system. In general, the

modeling emission data features episodic

- day emissions. Seasonal variations in activity

levels are taken into account in developing gridded stationary point and area source

emissions. Variations in temperature, hours of operation, speed of motor vehicles, or

other factors are considered in developing gridded motor vehicle emissions. Hence,

“gridded” emissions data used f or ozone modeling applications (Chapter 5) differ from

the average annual day or planning inventory emission data in two respects: 1) the

### FINAL 1997 AQMP

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- 6

modeling region covers larger geographic areas than the Basin; and 2) emissions

represent day

- specific instead of average or seasonal conditions. In the 1997 AQMP,

gridded inventories associated with four ozone and two PM 10 

### episodes have been

prepared for air quality modeling analyses. In addition, gridded emissions for 1995 were

developed to calculate annual average PM

10 

### concentrations.

FIGURE 3

- 2

Comparison of Emissions Between EMFAC7F and EMFAC7G

(From information provided by the California Air Resources Board

- December 1995 Release)

### Chapter 3 Base Year and Future Emissions

3

- 7 

## BASE YEAR EMISSIONS

Reconstructed 1987 and 1990 Emission Inventories

The federal and state Clean Air Acts have specified the 1987 and 1990 emission

inventories, respectively, as the baseline for measuring emission reduction progress.

Therefore, inventories for both years have been revised since the adoption of the 1994

AQMP to reflect improvements in emissions estimates and inventory methodology; this

provides a consistent basis for emission trend analysis. Most noticeably, a significant

change in methodology has been made to on

- road and PM 10 

### categories. Tables 3

- 1 and

3

- 2 present the reconstructed 1987 and 1990 emissions by major source category for the

criteria pollutants VOC, NO

x 

### , SO

x 

### , CO, and PM 10



### .



## 1993 Emission Inventory

Table 3

- 3 shows the 1993 emission inventory. Figure 3

- 3 characterizes relative

contributions by stationary an d mobile source categories. Stationary sources are

subdivided into point (e.g., chemical manufacturing, petroleum production, and electric

utilities) and area sources (e.g., architectural coatings, residential water heaters, and

consumer products). Mobile sources consist of on

- road (e.g., light

- duty passenger cars)

and off

- road sources (e.g., trains and ships).

Overall, total mobile source emissions account for 61 percent of the VOC and 88 percent

of the NO

x 

### emissions for these two ozone

- forming pollutan ts. The on

- road mobile

category alone contributes about 51 and 63 percent of the VOC and NO

x 

### emissions,

respectively and approximately 78 percent of the CO.

Within stationary sources, point sources contribute more NO

x 

### and SO

x 

### emissions than

area sources. However, area sources play a major role in VOC emissions, emitting about

two to three times more than point sources. Furthermore, area sources are the

predominant source (87 percent) of PM 10 

### emissions due to inclusion of travel

- related

activity.

### FINAL 1997 AQMP

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- 8 TABLE 3

- 1A

Summary of Emissions By Major Source Category: 1987 Base Year

Average Annual Day (tons/day 1 

### )

Source Category VOC NO

x CO SO

x PM 10

Stationary Sources

Fuel Combustion 12 210 72 14 12

Waste Burning 2 2 17 1 3

Solvent Use 520 1 0 0 2

Petroleum Process,

Storage, & Transfer 105 8 6 19 3

Industrial Processes 27 8 3 6 29

Misc. Processes* 40 8 13 1 408

Total Stationary Sources 706 237 111 41 457

Mobile Sources

On

- Road Vehicles 988 772 6,931 35 26

Off

- Road Vehicles 124 294 1,3 63 49 19

Total Mobile Sources 1,112 1,066 8,294 84 45

TOTAL 1,818 1,303 8,405 125 502



### TABLE 3

- 1B

Summary of Emissions By Major Source Category: 1987 Base Year

Planning Inventory** (tons/day 1 

### )

SUMMER

OZONE PRECURSORS WINTER

PRECURSORS

Source Category VOC NO

x NO

x CO

Stationary Sources

Fuel Combustion 12 211 226 86

Waste Burning 1 2 3 33

Solvent Use 611 1 1 0

Petroleum Process, Storage, & Transfer 105 8 8 6

Industrial Processes 39 9 8 3

Misc. Processes 46 10 10 14

Total Stationary Sour ces 814 241 256 142

Mobile Sources

On

- Road Vehicles 944 750 801 7,616

Off

- Road Vehicles 151 361 358 1,651

Total Mobile Sources 1,095 1,111 1,159 9,267

TOTAL 1,909 1,351 1,415 9,409

* Travel related road dust included **Planning inventories are not used for PM 10 analysis

1 Values are rounded to nearest integer

### Chapter 3 Base Year and Future Emissions

3

- 9 TABLE 3

- 2A



### Summary of Emissions By Major Source Category: 1990 Base Year

Average Annual Day (tons/day 1 

### )

Source Category VOC NO

x CO SO

x PM 10

Stationary Sources

Fuel Co mbustion 12 193 97 19 15

Waste Burning 2 2 19 0 2

Solvent Use 474 1 0 0 1

Petroleum Process, Storage,

& Transfer 109 5 4 12 3

Industrial Processes 30 7 3 5 29

Misc. Processes* 31 1 8 0 397

Total Stationary Sources 658 209 131 36 447

Mobile Sources

On

- Road Vehicles 863 891 6,679 34 39

Off

- Road Vehicles 127 313 1,413 34 20

Total Mobile Sources 990 1,204 8,092 68 59

TOTAL 1,648 1,413 8,223 104 506



### TABLE 3

- 2B



### Summary of Emissions By Major Source Category: 1990 Base Year

Pl anning Inventory** (tons/day 1 

### )

SUMMER

OZONE PRECURSORS WINTER

PRECURSORS*

Source Category VOC NO

x NO

x CO

Stationary Sources

Fuel Combustion 14 202 215 120

Waste Burning 1 2 3 35

Solvent Use 547 1 1 1

Petroleum Process, Storage, & Transfer 110 5 5 5

Industrial Processes 40 8 8 3

Misc. Processes 33 2 2 9

Total Stationary Sources 745 220 234 173

Mobile Sources

On

- Road Vehicles 833 868 921 7,381

Off

- Road Vehicles 155 384 382 1,723

Total Mobile Sources 988 1,252 1,303 9,1 04

TOTAL 1,733 1,472 1,537 9,277

* Travel related road dust included **Planning inventories are not used for PM 10 analysis

1 Values are rounded to nearest integer

### FINAL 1997 AQMP

3

- 10 TABLE 3

- 3A



### Summary of Emissions By Major Source Category: 1993 Base Year

Average Annual Day (tons/day 1 

### )

Source Category VOC NO

x CO SO

x PM 10

Stationary Sources

Fuel Combustion 11 136 65 8 10

Waste Burning 1 3 17 2 2

Solvent Use 331 0 0 0 1

Petroleum Process, Storage,

& Transfer 58 8 5 11 2

Industrial Processes 17 6 1 2 20

Misc. Processes* 32 1 11 0 344

Total Stationary Sources 450 154 99 23 379

Mobile Sources

On

- Road Vehicles 676 794 5,682 25 27

Off

- Road Vehicles 114 246 1,264 31 15

Total Mobile Sources 790 1,040 6,946 56 42

TOTAL 1,240 1,194 7,045 79 421



### TABLE 3

- 3B



### Summary of Emissions By Major Source Category: 1993 Base Year

Planning Inventory** (tons/day 1 

### )

SUMMER

OZONE PRECURSORS WINTER

PRECURSORS*

Source Category VOC NO

x NO

x CO

Stationary Sources

Fuel Combustion 11 135 149 76

Waste Burning 1 2 4 34

Solvent Use 364 0 0 0

Petroleum Process, Storage, & Transfer 59 8 8 5

Industrial Processes 22 6 6 1

Misc. Processes 34 1 1 11

Total Stationary Sources 491 152 168 127

Mobile Sources

On

- Road Vehicles 648 775 822 5,908

Off

- Road Vehicles 138 296 294 1,538

Total Mobile Sources 786 1,071 1,116 7,446

TOTAL 1,277 1,223 1,284 7,573

* Travel related road dust included **Planning inventories are not used for PM 10 analysis

1 Values are rounded to nearest integer

### Chapter 3 Base Year and Future Emissions

3

- 11 FI GURE 3

- 3

Relative Contribution By Source Category to the 1993 Inventory

### FINAL 1997 AQMP

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- 12

In the mobile source category, emissions from on

- road vehicles are much higher than

those from off

- road sources for all criteria pollutants except SO

x 

### . This can be explained

by the fact that the sulfur content in fuels used for off

- road vehicles is relatively higher

than those for on

- road vehicles.

Figure 3

- 4 compares the 1993 inventory with the reconstructed 1987 and 1990

inventories. As can be seen, slight emission reductions are shown for all stationary

source pollutants due to adopted air regulations. Existing ARB vehicle regulations result

in reductions in VOC and CO. The noticeable increase in NO

x 

### emissions between 1987

and 1990 is due to the shift to 1990 census data as well as the estimated increase in

heavy

- duty vehicle VMTs.

*CO Emission values were divided by 10.



### FIGURE 3

- 4

Comparison of Reconstructed 1987, 1990 Inventories and 1993 Inventory



## FUTURE EMISSIONS

Data Development

The milestone years 1996, 1997, 1999, 2000 , 2002, 2003, 2005, 2006, 2007, 2008, and

2010 are the target years for emissions rate

- of

- progress estimates under the federal Clean

Air Act and the state Clean Air Act. In addition, an emissions inventory for the year

2020 is also prepared for the first time to form the basis for a first look at the air quality

once the region attains the federal clean air standards. Due to the adoption of the NO

x

### Chapter 3 Base Year and Future Emissions

3

- 13 and SO

x 

### RECLAIM program in October 1993, future emissions are divided into

RECLAIM and non

- RECLAIM emissions . Future NO

x 

### and SO

x 

### emissions from

RECLAIM sources are estimated based on their initial allocations as specified by District

Rule 2002. The revised allocations for the six source categories as part of District Rule

2015 technology review are incorporated in the RECLAIM emission forecast. The

forecasts for non

- RECLAIM emissions were derived using: 1) emissions from the 1993

base year; 2) expected controls after implementation of District and ARB rules adopted

by September 30, 1996; and 3) emissions growt h in various source categories between

the base and future years. Rules adopted after September 30, 1996 are treated as baseline

adjustment measures for emissions reduction accounting purposes. A detailed

description of the forecasting methodology is provided in Appendix III of the 1997

AQMP.

Demographic growth forecasts for various socioeconomic categories (e.g., population,

housing, employment by industries), developed by SCAG, were used to estimate future

emissions. The 1990 Census data were used to validate the 1990 socioeconomic data

and future growth. Industry growth factors for 2000, 2005, 2010, 2015 and 2020 were

provided by SCAG. Growth factors for other interim years were interpolated between

key forecast years. CEC

- adopted energy efficiency standards and energy

- based forecasts

for the petroleum industry are also used to improve emission forecasts for certain gas

appliance and refinery operation related categories. Table 3

- 4 summarizes key

socioeconomic parameters used in the 1997 AQMP for emissions inventory

development.

TABLE 3

- 4

Baseline Socioeconomic Forecasts Used in 1997 AQMP*

Category 1993 2000 (% Growth) 2010 (% Growth)

Population

(Millions) 13.8 14.8 (+7) 16.7 (+21)

Housing Units

(Millions) 4.8 5.1 (+6) 5.7 (+19)

Total Employment

(Millions) 6.0 6.7 (+12) 8.0 (+33)

Daily VMT 293.3 317.9 (+8) 377.9 (+29)

Daily Vehicle Trips

(Millions) 31.2 33.2 (+6) 37.9 (+21)

* No AQMP measures included.



### Current forecasts indicate that this region will experience a population growth of 21

percen t by the year 2010 with a 29 percent increase in vehicle miles traveled (VMT).

### FINAL 1997 AQMP

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- 14

The current projection for the year 2010 shows about half a million decrease in

population and a 36

- million mile decrease in VMT forecast as compared to the

projection from the 1994 AQMP. The differences in the forecasts are primarily due to

the change in base year from 1990 to 1993.



## Summary of Baseline Emissions

Emission data by source categories (point, area, on

- road mobile and off

- road mobile

sources) and by pollutants are p resented in Tables 3

- 5 through 3

- 7 for the years 2000,

2006, and 2010.

Without any additional controls, VOC, NO

x 

### , and CO emissions are expected to decrease

due to existing regulations, such as the LEV and oxygenated fuel programs, and the

RECLAIM program. Figure 3

- 5 illustrates the relative contribution to the 2010

inventory by source category. A comparison between Figures 3

- 3 and 3

- 5 indicates that

the on

- road mobile category continues to be a major contributor to CO and NO

x 

### emissions. However, due to t he adopted LEV regulation, by 2010 on

- road mobile

accounts for about 19 percent of total VOC emissions compared to 51 percent in 1993.

Meanwhile, area sources become the major contributor to VOC emissions from 30

percent in 1993 to 48 percent in 2010.

### Chapter 3 Base Year and Future Emissions

3

- 15 TABLE 3

- 5A

Summary of Emissions By Major Source Category: 2000 Base Year

Average Annual Day (tons/day 1 

### )

Source Category VOC NO

x CO SO

x PM 10

Stationary Sources

Fuel Combustion 10 64 64 2 9

Waste Burning 6 5 91 0 11

Solvent Use 316 0 0 0 1

Petrol eum Process, Storage, &

Transfer 45 0 5 0 2

Industrial Processes 20 0 1 0 23

Misc. Processes* 32 1 11 0 364

RECLAIM Source NA 43 NA 16 NA

Total Stationary Sources 429 113 172 18 410

Mobile Sources

On

- Road Vehicles 350 521 2,963 14 16

Off

- Road Vehicles 112 248 1,270 34 15

Total Mobile Sources 462 769 4,233 48 31

TOTAL 891 882 4,405 66 441



### TABLE 3

- 5B

Summary of Emissions By Major Source Category: 2000 Base Year

Planning Inventory** (tons/day 1 

### )

SUMMER

OZONE PRECURSORS WINTER

PR ECURSORS*

Source Category VOC NO

x NO

x CO

Stationary Sources

Fuel Combustion 10 60 72 77

Waste Burning 3 3 12 200

Solvent Use 348 0 0 0

Petroleum Process, Storage, &

Transfer 46 0 0 5

Industrial Processes 27 0 0 1

Misc. Processes 34 1 1 12

RECLAIM Source NA 45 45 NA

Total Stationary Sources 468 109 130 295

Mobile Sources

On

- Road Vehicles 334 509 535 3,298

Off

- Road Vehicles 135 298 295 1,549

Total Mobile Sources 469 807 830 4,847

TOTAL 937 916 960 5,142

* Travel rel ated road dust included **Planning inventories are not used for PM 10 analysis

1 Values are rounded to nearest integer

### FINAL 1997 AQMP

3

- 16 TABLE 3

- 6A

Summary of Emissions By Major Source Category: 2006 Base Year

Average Annual Day (tons/day 1 

### )

Source Category VOC NO

x CO SO

x PM 10

Stationary Sources

Fuel Combustion 10 65 71 2 10

Waste Burning 7 6 102 0 12

Solvent Use 340 0 0 0 1

Petroleum Process, Storage,

& Transfer 46 0 5 0 2

Industrial Processes 23 0 1 0 23

Misc. Processes* 33 1 12 0 376

RECLAIM Source NA 32 NA 11 NA

Total Stationary Sources 459 104 191 13 424

Mobile Sources

On

- Road Vehicles 222 403 2,103 16 14

Off

- Road Vehicles 120 231 1,363 37 16

Total Mobile Sources 342 634 3,466 53 30

TOTAL 801 738 3,657 66 454



### TABLE 3

- 6B

Summary of Emissions By Major Source Category: 2006 Base Year

Planning Inventory** (tons/day 1 

### )

SUMMER

OZONE PRECURSORS WINTER

PRECURSORS*

Source Category VOC NO

x NO

x CO

Stationary Sources

Fuel Combustion 11 60 73 85

Waste Burning 4 4 13 227

Solvent U se 374 0 0 0

Petroleum Process, Storage, &

Transfer 46 0 0 5

Industrial Processes 31 0 0 1

Misc. Processes 35 1 1 13

RECLAIM Source NA 33 33 NA

Total Stationary Sources 501 98 120 331

Mobile Sources

On

- Road Vehicles 217 396 413 2,274

Off

- Road Vehicles 145 274 271 1,655

Total Mobile Sources 362 670 684 3,929

TOTAL 863 768 804 4,260

* Travel related road dust included **Planning inventories are not used for PM 10 analysis

1 Values are rounded to nearest integer

### Chapter 3 Base Year and Future Emissions

3

- 17 TABLE 3

- 7A

Summar y of Emissions By Major Source Category: 2010 Base Year

Average Annual Day (tons/day 1 

### )

Source Category VOC NO

x CO SO

x PM 10

Stationary Sources

Fuel Combustion 11 65 75 2 10

Waste Burning 7 6 102 0 12

Solvent Use 362 0 0 0 1

Petroleum Process, Storage,

& Transfer 46 0 5 0 3

Industrial Processes 26 0 1 0 24

Misc. Processes* 34 1 13 0 383

RECLAIM Source NA 32 NA 11 NA

Total Stationary Sources 486 104 196 13 433

Mobile Sources

On

- Road Vehicles 165 365 1,810 17 14

Off

- Road V ehicles 119 228 1,335 40 16

Total Mobile Sources 284 593 3,145 57 30

TOTAL 770 697 3,341 70 463



### TABLE 3

- 7B

Summary of Emissions By Major Source Category: 2010 Base Year

Planning Inventory** (tons/day 1 

### )

SUMMER

OZONE PRECURSORS WINTER

PRECURSORS*

Source Category VOC NOx NOx CO

Stationary Sources

Fuel Combustion 11 60 72 91

Waste Burning 4 4 13 227

Solvent Use 400 0 1 0

Petroleum Process, Storage, &

Transfer 47 0 0 5

Industrial Processes 33 0 0 1

Misc. Processes 36 1 1 13

RECLAIM So urce NA 33 33 NA

Total Stationary Sources 531 98 120 337

Mobile Sources

On

- Road Vehicles 163 360 373 1,913

Off

- Road Vehicles 145 269 266 1,643

Total Mobile Sources 308 629 639 3,556

TOTAL 839 727 759 3,893

* Travel related road dust included **Planning inventories are not used for PM 10 analysis

1 Values are rounded to nearest integer

### FINAL 1997 AQMP

3

- 18 FIGURE 3

- 5

Relative Contribution By Source Category to the 2010 Inventory