Q

y 

g

ct (SCAQMD)

From: Lily Wong

Rules Office, Air Division, USEPA Region IX

To: Docket No. EPA-R09-OAR-201 1-0876

In EPA’s response to comments for our rulemaking in Docket No. EPA-R09-OAR-201 1-0876,

we include a statement that mobile sources are responsible for approximately 90% ofthe NO

emissions in SCAQMD. This memorandum explains the basis for the 90% figure.

The attached printout to this memorandum is from the California Air Resources Board’s

California Emissions Projection Analysis Model (CEPAM): 2009 Almanac’ for SCAQMD. 2The

printout shows:

• NO emissions in the year 2010 in SCAQMD was estimated to be 830.972 tons

• NO emissions attributable to mobile sources was estimated to be 756.933 tons

NO emissions attributable to mobile sources in SCAQMD during the ozone season =

(756.933 tons) ÷ (830.972 tons) 91%

Attachment

‘CEPAM may be found at http:!/www.arb.ca.gov/app/emsinv/fcemssumcat2009.php 2 For the 1-hour ozone standard, SCAQMD includes the South Coast Air Basin as well as the Coachella Valley portion ofthe Southeast Desert Modified Air Quality Maintenance Area.

The base year is 2008 and the selected season was the summer.
Show emissions which have been grown and controlled [(see note 2 below)

Display emissions for one or more of the following years:

.Z1975 1L1980 L.1985 LE1990

LEH995 L2000 12005 L2008[Z2olo LE2015 L2020

Select Source Type All Sources except Natural

Select geographic area for report:

Statewide

[] District — Select District: SOUTH COAST AQMD

[]Air Basin-- Select Air Basin: GREAT BASIN VALLEYS

] County— Select County: ALAMEDA L• L!E Split by Air Basin

Run Report ] [ Reset Form

Notes:

1. For stationary sources, summer and winter seasonal emissions are only available for years 1990 and later due to lack of temporal

data for earlier years.

2. “Grown only” and “controlled only” options are available for stationa,y and area sources for all future years. For historical years

(,e. pre-base year), only area sources are available.

3. Ammonia emission estimates currently under revision.

The Board is one of five boards, departments, and offices under

the umbrella of the California Environmental Protection Agency.

Cal/EPA I IES I PIQ I OEHHA I SWRCB

http://www.arb.ca.gov/app/emsinv/fcemssumcat2009.php 9/13/2012
BASE YEAR: 2008

All emissions are represented in Tons per Day and reflect the most current data provided to ARB

Download this data as a comma deimited file.Download more detail data as a comma delimited file.

STATIONARY SOURCES

[ SUMMARY CA TEGORYNAME I 20101

FUEL COMBUSTIONIELECTRIC UTILITIES 6.5721

ICOGENERATION O.573jlOlL AND GAS PRODUCTION ICOMBUSTON) 0.9141

IPETROLEUM REFINiNG (COMBUSTION) 5.7801‘MANUFACTURING AND INDUSTRIAL 16.083j

IFOOD AND AGRICULTURAL PROCESSING 0.5841

SERVICE AND COMMERCiAL ri 1.152!

OTHER (FUEL COMBUSTION) 6.4901

1* TOTAL FUEL COMBUSTION 48.1501

IWASTE DISPOSALISEWAGE TREATMENI 0.0021

LANDFILLS [ 0.665!

IINCINERATORS 1.4381

ISOIL REMEDIATION 0.0101IöER (WASTE DISPOSAL) 0.004!

1* TOTAL WASTE DISPOSAL j 2.1181

CLEANING AND SURFACE COATINGS

ILAUNDERING J 0.0001IEASIN 0.0001

ICOATINGS AND RELATED PROCESS SOLVENTS 0.0441IPRINTING 0.000

IADHESIVES AND SEALANTS 0.0001

Iö:ER (cLEANING AND SURFACE COATINGS) 0.11

* TOTAL CLEANING AND SURFACE COATINGS 0.1631

IPETROLEUM PRODUCTION AND MARKETING

lolL AND GAS PRODUCTION 0.2801

IPETROLEUM REFIII 4.3961IPETROLEUM MARKETING 0.0111

IiER (PETROLEULPRODUCTTONP MARKETING 0.0001

1* TOTAL PETROLEUM PRODUCTION AND MARKETING 1 4.687IINDUSTRIAL PROCESSES

I 0.0861

IFQOD AND AGRICULTURE 0.0061IINERAL PROCESSES 1.5601

IMETAL PROCESSES 0.167

IWOOD AND PAPER 0.000

http://www.arb.ca.gov/app/emsinv/cepam_emssumcat_query.php 9/13/2012
AL 

[ 

ooo

IPESTIcJDESERTILIZERS 0.000

IASPHALT PAV!NG I ROOFING 0.000

TOTAL SOLVENT EVAPORATION 0.000

MISCELLANEOUS PROCESSES

RESIDENTIAL FUEL COMBUSTION 15.558j

I FARMING OPERATIONS 0.000

cONSTRUcTION AND DEMOL1TION 0.000

DROAD DUST 0.000

)UNPAVED ROAD DUST 0.000

I FUGITIVE WINDBLOWN DUST o.oooj

I FIRES V 0.077

MANAGED BURNING AND DISPOSAL 0.569

COOKING 0.000 1* TOTAL MISCELLANEOUS PROCESSES 16.203

TOTAL AREAWIDE SOURCES 16.203

[ MOBILE SOURCES [ SUMMARY CA TEGORYNAME 2010 rON-ROAD MOTOR VEHICLES

LIGHT DUTY PASSENGER (LDA) 55.906

LIGHT DUTY TRUCKS - (LDTI) [ 12.495 IHT DUTY TRUCKS 2 (PI 46.356

I MEDIUM DUTY TRUCKS (MDV) 27.806

I LIGHT HEAVY DUTY GAS TRUCKS - I (LHDVI) 14.886j

I LiGHT HEAVY DUTY GAS TRUCKS 2 (LHDV2) 2.937

I MEDIUM HEAVY DUTY GAS TRUCKS (MHDV) 4.781

HEAVY HEAVY DUTY GAS TRUCKS (HH 5.664

I LIGHT HEAVY DUTY DIESEL TRUCKS 1 LHDV1) 8.696

ILIGHT HEAVY DUTY DIESEL TRUCKS - 2 (LHDV2) 7.206

MEDIUM HEAVY DUTY DIESEL TRSj(HD). 47.989

HEAvY HEAVY DUTY DiESEL TRUCKS (HHDV) 173.706

MOTORcYcLES (Mcyi 31431

HEAVY DUTY DIESEL URBAN BUSES (UB) 10.908

HEAVY DUTY GAS URBAN BUSES (US) 1 0.828

SCHOOL BUSES ( 4.2891

OTHER BUSES (OB 2.923

MOTOR HOMES (MH) V [ 2.687 1* TOTAL ON-ROAD MOTOR VEHICLES 433.206

OTHER MOBILE SOURCES

Ic 20.8801

TRAINS 22.1811

)OEAN GOING VESSELS 59.118

100 MERCAL HARBOR CRAFT 14.8291

jCREATIONAL BOATS 17.2231

http://www.arb.ca.gov/app/emsinv/cepam_emssumcat_query.php 9/13/2012
Emissions from natural sources are excluded.

See NATURAL Sources

The Board is one of five boards, departments, and offices under

the umbrella of the California Environmental Protection Agency.

Cal/EPA I [PEE I I OEHHA I SWRCB

http://www.arb.ca.gov/app/emsinv/cepamemssumcatquery.php 9/13/2012