SCOS97 Emissions SCOS97 Emissions InventoryInventory

Mena ShahMena Shah

SCOS97-NARSTO DATA SCOS97-NARSTO DATA ANALYSIS CONFERENCEANALYSIS CONFERENCE

February 14, 2001February 14, 2001

Diamond BarDiamond Bar

Introduction Introduction

Relationship between emissions, interbasin Relationship between emissions, interbasin transport, and ozone standard exceedancestransport, and ozone standard exceedances

Facilitate planning for further emission reductions Facilitate planning for further emission reductions needed to attain the NAAQSneeded to attain the NAAQS

Accurate day-specific emission inventories are Accurate day-specific emission inventories are crucial for the studycrucial for the study

Emissions Inventory Development Emissions Inventory Development ProcessProcess

SCOS97-EIWGSCOS97-EIWG

Quality Control and Quality Assurance PlanQuality Control and Quality Assurance Plan

Day-Specific Data CollectionDay-Specific Data Collection

Data ManagementData Management

Peer Review Peer Review

Roles & ResponsibilitiesRoles & Responsibilities

Stationary Area Mobile Aircraft Ships Biogenic Wildfires

ARB - LocalAPCDs - - -

OtherAgencies

- - Private - - -

Stationary SourcesStationary Sources Local districtsLocal districts collected hourly activi collected hourly activi ty data from ty data from

facilities such as power plants, petroleum refineries, facilities such as power plants, petroleum refineries, utility companies, oil companies, etc utility companies, oil companies, etc

Continuous emission monitoring (CEMS) data were Continuous emission monitoring (CEMS) data were collected from some major facilities collected from some major facilities

For some facilities information on daily emission For some facilities information on daily emission profiles was obtainedprofiles was obtained

Information on temporary breakdowns, shutdowns, Information on temporary breakdowns, shutdowns, and variances was collectedand variances was collected

Area SourcesArea Sources

o Districts are responsible for over one-half Districts are responsible for over one-half of the 260 area source categories in the of the 260 area source categories in the statewide annual emission inventorystatewide annual emission inventory

o No day-specific information was collected No day-specific information was collected for area-wide sourcesfor area-wide sources

Mobile SourcesMobile Sources

Use EMFAC and DTIM models for Use EMFAC and DTIM models for estimating emissionsestimating emissions

Transportation network from CALTRANS, Transportation network from CALTRANS, COGsCOGs

UCD developed day-of-week adjustmentsUCD developed day-of-week adjustments

Emission estimates from some non-road Emission estimates from some non-road sources came from the OFFROAD modelsources came from the OFFROAD model

AircraftAircraft Collected most comprehensive real-time aircraft Collected most comprehensive real-time aircraft

activity data from private contractoractivity data from private contractor

Activity data at different altitude and speed were Activity data at different altitude and speed were collectedcollected

Developed aircraft type-engine model linkages Developed aircraft type-engine model linkages

Emission factors from EDMSEmission factors from EDMS

PM emission factors from CDMPM emission factors from CDM

ShipsShips

Actual ship activity data from MAREX, Actual ship activity data from MAREX, Ports, U.S. NavyPorts, U.S. Navy

Actual speed data from MAREXActual speed data from MAREX

Ship-specific engine characteristics data Ship-specific engine characteristics data from JJMAfrom JJMA

Emission factors from ARCADIS, Lloyds Emission factors from ARCADIS, Lloyds RegistryRegistry

BiogenicBiogenic

(GIS) Land use and land cover maps from the (GIS) Land use and land cover maps from the GAP, Kern County, SCAG and SANDAGGAP, Kern County, SCAG and SANDAG

Leafmass Distribution –LAI from NikolovLeafmass Distribution –LAI from Nikolov

Emission rates compilation from peer review Emission rates compilation from peer review literatureliterature

WildfiresWildfires

Information on wildfires was obtained from Information on wildfires was obtained from CDF, USFS, BLM, BIA, local newsCDF, USFS, BLM, BIA, local news

Extensive daily activity data collected for the Extensive daily activity data collected for the entire study periodentire study period

Emission factors were obtained from USFSEmission factors were obtained from USFS

Emissions Summary Emissions Summary (*tpd for August 5, 1997)(*tpd for August 5, 1997)

Category ROG NOx CO SOx PMStationary 242 268 212 150 134

Area 492 170 548 9.4 2110

Ships* 1.3 35 3.5 35 3.1

Onroad* 951 1120 9215 18 37

Offroad* 34 513 1447 58 31

Mexico 317 113 936 201 80

Total 2037 2219 12362 472 2395

Wildfires* 2245 440 16921 0 3739

Biogenic* 660 0 0 0 0

ROG Emissions ROG Emissions (w/o Fires)(w/o Fires)

Biogenic24%

Onroad36%Offroad

1%

Stationary9%

Area18%

Mexico12%

Ships<1%

NOx Emissions NOx Emissions (w/o Fires)(w/o Fires)

Onroad50%

Offroad23%

Stationary12%

Area8%

Mexico5%

Biogenic0% Ships

2%

CO Emissions CO Emissions (w/o Fires)(w/o Fires)

Onroad74%

Offroad12%

Stationary2%

Area4% Mexico

8%Biogenic

0% Ships<0.5%

PM Emissions PM Emissions (w/o Fires)(w/o Fires)

Area88%

Mexico3%

Offroad1%

Stationary6%

Biogenic0%

Ships<1%

Onroad2%

ROG Emissions ROG Emissions - 700 hrs- 700 hrs

ROG Emissions ROG Emissions - 1200 hrs- 1200 hrs

ROG Emissions ROG Emissions - 1600 hrs- 1600 hrs

NOx Emissions NOx Emissions - 700 hrs- 700 hrs

NOx Emissions NOx Emissions - 1200 hrs- 1200 hrs

NOx Emissions NOx Emissions - 1600 hrs- 1600 hrs

SummarySummary Key to the Project = TEAMWORKKey to the Project = TEAMWORK

Successful multi-agency approach leads to the Successful multi-agency approach leads to the development of a quality inventorydevelopment of a quality inventory

Aircraft emissions - First attempt to estimate Aircraft emissions - First attempt to estimate emissions above the average mixing heightemissions above the average mixing height

Ship emissions have considerable day-to-day variationShip emissions have considerable day-to-day variation

Wildfire emissions vary greatly day-to-day during Wildfire emissions vary greatly day-to-day during SCOS97 episodesSCOS97 episodes

AcknowledgementsAcknowledgements

Paul AllenPaul Allen Cheryl TaylorCheryl Taylor Dale ShimpDale Shimp Zorik PirveysianZorik Pirveysian Reyes RomeroReyes Romero Alan De SalvioAlan De Salvio

Alan Ballard Alan Ballard Joe PetriniJoe Petrini Carl Selnick Carl Selnick Iovanka TodtIovanka Todt Genie McGaughGenie McGaugh John DaMassaJohn DaMassa

Contact and InformationContact and Information

ARB Emissions Contact:ARB Emissions Contact:Mena ShahMena Shahmshah@arb.ca.govmshah@arb.ca.gov916-324-7165916-324-7165

ARB ARB Web Site:Web Site:http://www.arb.ca.gov/http://www.arb.ca.gov/

ENDEND