September

13, 2012 MEMORANDUM Subject: Calculation

of NO Emissions Attributable

to Mobile Sources

in the South Coast Air Quality Management

District (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%

of the 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. 2

The 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.php2 For
the 1-hour ozone standard, SCAQMD includes

the South Coast

Air Basin

as well

as the Coachella

Valley portion

of the Southeast
Desert Modified

Air Quality Maintenance

Area. The base year

is 2008

and the selected season

was
the summer.CEPAM:2009Almanac-StandardEmissionsToolPage1of1C!PAM:2009ALMNAC-STANDARDSSDNSTOOLEmissionProjectionsbySummaryCategoryBaseYear:2008ThispageupdatedApril13,2009SelectSeason:Summer•(seenote1below)SelectPollutant:OxidesofNitrogenShowemissionswhichhavebeengrownandcontrolled[(seenote2below)Displayemissionsforoneormoreofthefollowingyears:.Z19751L1980L.1985LE1990LEH995L200012005L2008[Z2oloLE2015L2020SelectSourceTypeAllSourcesexceptNaturalSelectgeographicareaforreport:Statewide[]District—SelectDistrict:SOUTHCOASTAQMD[]AirBasin--SelectAirBasin:GREATBASINVALLEYS]County—SelectCounty:ALAMEDAL•L!ESplitbyAirBasinRunReport][ResetFormNotes:1.Forstationarysources,summerandwinterseasonalemissionsareonlyavailableforyears1990andlaterduetolackoftemporaldataforearlieryears.2.“Grownonly”and“controlledonly”optionsareavailableforstationa,yandareasourcesforallfutureyears.Forhistoricalyears(,e.pre-baseyear),onlyareasourcesareavailable.3.Ammoniaemissionestimatescurrentlyunderrevision.TheBoardisoneoffiveboards,departments,andofficesundertheumbrellaoftheCaliforniaEnvironmentalProtectionAgency.Cal/EPAIIESIPIQIOEHHAISWRCBhttp://www.arb.ca.gov/app/emsinv/fcemssumcat2009.php9/13/2012CEPAM:2009Almanac-StandardEmissionsToolPage1of3CEPAM:2009ALMANAC-STANDARDEMISSIONSTOOLEmissionProjectionsbySummaryCategoryOxidesofNitrogenSOUTHCOASTAQMDDISTRICTREPORTTYPE:GROWNANDCONTROLLEDSEASON:SUMMERBASEYEAR:2008AllemissionsarerepresentedinTonsperDayandreflectthemostcurrentdataprovidedtoARBDownloadthisdataasacommadeimitedfile.Downloadmoredetaildataasacommadelimitedfile.STATIONARYSOURCES [SUMMARYCATEGORYNAMEI20101FUELCOMBUSTIONIELECTRICUTILITIES6.5721ICOGENERATIONO.573jlOlLANDGASPRODUCTIONICOMBUSTON)0.9141IPETROLEUMREFINiNG(COMBUSTION)5.7801‘MANUFACTURINGANDINDUSTRIAL16.083jIFOODANDAGRICULTURALPROCESSING0.5841SERVICEANDCOMMERCiAL

ri1.152!OTHER(FUELCOMBUSTION)6.49011*TOTALFUELCOMBUSTION48.1501IWASTEDISPOSALISEWAGETREATMENI0.0021LANDFILLS

[0.665!IINCINERATORS1.4381ISOILREMEDIATION0.0101IöER(WASTEDISPOSAL)0.004!1*TOTALWASTEDISPOSALj2.1181CLEANINGANDSURFACECOATINGSILAUNDERING

J0.0001IEASIN0.0001ICOATINGSANDRELATEDPROCESSSOLVENTS0.0441IPRINTING0.000IADHESIVESANDSEALANTS0.0001Iö:ER(cLEANINGANDSURFACECOATINGS)0.11*TOTALCLEANINGANDSURFACECOATINGS0.1631IPETROLEUMPRODUCTIONANDMARKETINGlolLANDGASPRODUCTION0.2801IPETROLEUMREFIII4.3961IPETROLEUMMARKETING0.0111IiER(PETROLEULPRODUCTTONPMARKETING0.00011*TOTALPETROLEUMPRODUCTIONANDMARKETING

14.687IINDUSTRIALPROCESSES

I0.0861IFQODANDAGRICULTURE0.0061IINERALPROCESSES1.5601IMETALPROCESSES0.167IWOODANDPAPER0.000http://www.arb.ca.gov/app/emsinv/cepam_emssumcat_query.php9/13/2012CEPAM:

2009 Almanac- Standard Emissions

Tool

Page

2 of

3 IGLPSs

AND RELATED PRODUC

0.0l4 EcTRONIcS

0.046j OTHER (INOUSTRAL PROCESSES)

0.6601 1* TOTAL INDUSTRIAL PROCESSES

2.538 [** TOTAL STATIONARY SOURCES

57.6561 AREAWIDE SOURCES [

SUMMARY CATEGORYNAME

2010j r SOLVENT EVAPORATION I CONSUMER PRODUCTS

0.0001 ARcHITEcTURAL

COATINGS

AND RELATED PROCESS SOLVENTS

[ o.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 D ROAD DUST

0.000 )UNPAVED

ROAD DUST

0.000 I FUGITIVE WINDBLOWN

DUST

o.oooj I FIRESV

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 r ON-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

9/13/2012CEPAM:2009Almanac-StandardEmissionsToolPage3of3—.,....._.._..f\JZJ10FF-ROADEQUIPMENTIFARMEQUIPMENTIFIIFISTflPACFANflHANflIN(1*TOTALOTHERMOBILESOURCES‘MOBILESOURCES181.07218.25110.00011323.72711756.9331IflJF..PflAflRF(“‘“0.1731FGRANDTOTALFORSOUTHCOASTAQMD11830.7921Emissionsfromnaturalsourcesareexcluded.SeeNATURALSourcesTheBoardisoneoffiveboards,departments,andofficesundertheumbrellaoftheCaliforniaEnvironmentalProtectionAgency.Cal/EPAI[PEEIIOEHHAISWRCBhttp://www.arb.ca.gov/app/emsinv/cepamemssumcatquery.php9/13/2012