Regulatory Update South Coast Air Quality

Management District

California Desert Air Working Group ConferenceOctober 8 & 9 , 2014

Pala, California

Mohsen Nazemi, P.E.Deputy Executive Officer

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SCAQMD Regulatory Update2014 New Rules/Compliance Deadlines for Criteria

PollutantsRule 444 – Open Burning at Beaches (PM)Rule 461 – Above Ground Gasoline Storage Tank (VOCs)Rule 1110.2 – Internal Combustion Engines (NOx/CO/VOCs)Rule 1111 – NG Fired Central Furnaces (NOx)Rule 1113 – Architectural Coatings (VOCs)Rule 1114 – Refinery Coking Operations (VOCs)Rule 1146/1146.1 – Boilers/Steam Generators/Heaters

(NOx)Rule 1147 – Other Miscellaneous Sources (NOx)Rule 1155 – Particulate Matter Control Devices (PM)

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SCAQMD Regulatory Update2014 New Rules/Compliance Deadlines for ToxicsRule 1420.1 – Lead Acid Battery Recycling (Lead,

Arsenic, etc.)Rule 1472 – Diesel Fired Emergency Standby

Engines(Diesel PM)

2014/15 Proposed RulesRule 1430 – Metal Grinding Operations (Nickel,

Chrome, etc. metal dust)Rule 415 – Rendering Operations (Odors)Rule 1148.1 – Oil & Gas Production / Fracking

Operations

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SCAQMD Other UpdatesExide Technologies – Lead Acid Battery RecyclingAllenco Energy, Inc. – Oil & Gas ProductionRidgeline RDX – Commercial Wastewater

TreatmentHixson – Metal Finishing Operations

Port of LA FireSalton Sea H2S ReleasesAdopted a Drought Management & Water

Conservation Plan

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Multiple Air Toxics Exposure Study (MATES IV) - Draft Report

Provide the public with information on toxic exposure and risk

Evaluate progress in reducing air toxics exposure

Provide direction to future toxics control programs

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MATES Background

MATES I: 1987MATES II: 1998-99MATES III: 2004-2006MATES IV: 2012-2013

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Key ComponentsMonitoring

Added black carbon & ultrafine particle countsImproved analysis methodsPAH at selected sites

Emissions inventoryBased on latest 2012 AQMP inventory

ModelingConsistent with AQMP modeling platformExtended to include Coachella Valley

Technical Advisory Group Input on study plan and draft report

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MATES IV Monitoring Sites10 sites, every 6th day, July 2012 – June 2013

F o n t a n a

Rubidoux

Wilmington

Pico Rivera

Sun Valley

San Bernardino Industry

Compton

Burbank

Anaheim

Inland Valley S.B.

Rubidoux

W. Long Beach N. Long Beach

Pico Rivera Central Los Angeles

Huntington Park

Substances MeasuredAcetaldehyde Dichloroethane Organic Carbon (OC)

Acetone Elemental Carbon (EC) PAHs

Arsenic Ethyl Benzene Perchloroethylene

Benzene Formaldehyde PM2.5

Black Carbon (BC) Hexavalent Chromium PM10

1,3-Butadiene Lead Selenium

Cadmium Manganese Styrene

Carbon Tetrachloride Methylene Chloride Toluene

Chloroform Methyl ethyl ketone Trichloroethylene

Copper MTBE Ultrafine Particles (UFP)

Dibromoethane Naphthalene Vinyl Chloride

Dichlorobenzene Nickel Xylene

Zinc9

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Summary of Major MATES IV FindingsCancer Risk has decreased more than 50%

between MATES III (2005) and MATES IV (2012)Monitoring, inventory, and modeling approaches all

produce similar resultsWhile Diesel PM exposure decreased by ~70%, it

still dominates the overall cancer risk from air toxics

Highest risk areas near ports and transportation corridors

Risk from other air toxics continue to decline, with limited exceptions

Ultrafine Particle measurements show higher levels in areas with higher population and traffic density

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MATES IV Monitored Air Toxics RiskEstimated basin

wide lifetime air toxics risk 418 per million

65% overall risk reduction from MATES III based on monitoring

Mobile sources account for 90% of air toxics risk

Diesel accounts for 68% of air toxics risk

68.2%

8.4%

7.8%

5.0%

10.6%

MATES IV Air Toxics Risk

Diesel PM

Benzene

1,3 Butadiene

Carbonyls

Other

Basinwide Risk: 418 per millionBased on Average at 10 Fixed Monitoring sites

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0

200

400

600

800

1000

1200

1400

1600

III IV III IV III IV III IV III IV III IV III IV III IV III IV III IV III IV

Anaheim Burbank Central LA Compton Inland Valley S.B.

Huntington Park

North Long Beach

Pico Rivera Rubidoux W. Long Beach

Sites Average

Diesel PM Benzene 1,3 Butadiene Carbonyls Other

Risk per Million

Monitored Air Toxics Risk by Site: MATES III vs. IV

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MATES IV Inventory-Based Risk Reductions(potency weighted)

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MATES III Modeled Air Toxics Risk

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MATES IV Modeled Air Toxics Risk

Basin and Port Area Population-Weighted Modeled Cancer Risk

Region

MATES IV MATES IIIAverage Percenta

ge Change in Risk

2012 Populatio

n

Average Risk(Per

Million)

2005 Populatio

n

Average Risk(Per

Million)

Basin15,991,15

0 367 15,662,620 853 -57

Ports Area 998,745 480 959,761 1,415 -66

Basin Excluding Ports Area

14,992,806 359 14,702,85

9 816 -56

Highest Grid Cell Risk 1,057

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CA Office of Environmental Health Hazard Assessment Updated Risk Assessment Methodology

Considers childhood susceptibility to carcinogen exposureUpdates age-specific breathing ratesReduces residential exposure period from 70 to 30 yearsNet effect:

Inhalation carcinogenic risk may increase by a factor

of about 2.7 for the same exposure concentrationActual carcinogenic risk still down by more than 50%

New guidelines under review, expected to be finalized by

1st quarter 2015

CAVEAT

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MATES IV Modeled Risk with Proposed OEHHA Methodology

Inhalation Risks go up by factor of about 2.7

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Summary/Policy ImplicationsContinued and substantial progress in reducing

exposure to air toxicsResidual risks from air toxics still unacceptably

high, and higher than we previously estimated given the revised OEHHA methodology

Diesel particulate exposure substantially reduced, but still the major contributor to air toxics risk, concentrated near ports and transportation corridors

Importance of continued reduction in mobile source emissions in order to achieve toxics reductions and federal standards

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Next StepsReleased Draft MATES IV Report

for 90-day public review (10/03/14)Draft Report , technical

appendices, and interactive risk map available on AQMD web site

Final Report: Spring 2015Update AQMD’s Air Toxic Control

Plan as part of the 2016 AQMP