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CAPCOA Health Impacts of Air Pollution on Communities

September 19-20, 2007

9:10 - 10:35 Current Paradigms: Strengths and Limitations--

1. Source Category Regulations2. Air Toxics “Hot Spots” Information and Assessment

Act & Risk Reduction Program3. New Source Review for Air Toxics

Chris Halm (916) 323-4865chalm@arb.ca.gov

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Outline

1. AB 2588 Air Toxics “Hot Spots” Program– Overview– Health Risk Assessment (HARP)– Public Notification and Risk Reduction– Relationship to Statewide Regulations

2. Community Health Air Pollution Information System (CHAPIS)

3. Air Quality Maps (AQMIS)4. Environmental Justice

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AB 2588 Air Toxics “Hot Spots” Program• “Hot Spots” addresses health risk posed by

air toxics from facility to nearby receptors• Applies to stationary sources like refineries,

power plants, dry cleaners, and gas stations• Implemented by local air districts

– ARB adopts emission inventory guidelines– OEHHA develops risk assessment guidelines

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The “Hot Spots” Process• Local air district identifies facility as subject

to “Hot Spots” • Facility estimates annual air toxic emissions

– Local air district reviews emissions data– Facilities are prioritized into risk categories

• Facility with potential risk conducts health risk assessment– District and OEHHA review risk assessment– Emissions and risk data sent to ARB

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HARP: Risk Assessment Software

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The Hotspots Analysis and Reporting Program (HARP) is a Tool to …

• Create and manage facility emissions data• Perform air dispersion modeling and risk analyses

– New On-RAMP allows AERMOD and CALPUFF dispersion modeling results to be used

• Make reports and maps • And... it’s free!

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HARP: Facility and Emissions Module

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HARP: Risk Analysis Step-through

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HARP: Risk Window and Map

Risk contours show health risk posed by

facility in community.

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Public Notification and Risk Reduction• Facilities required to send letters notifying

neighbors of significant risks• Most facilities voluntarily reduce risk to

avoid public notification if at all possible • Facility has up to 5 years to reduce risk • Risk communication is very difficult

– What does a risk of 10 per million mean?

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Recent Amendments to “Hot Spots”• Risk from stationary diesel engine emissions

now included in Program– Even after State regulation established hour limits for

each engine, “Hot Spots” needed as a backstop to ensure residual risk from all engines at facility is acceptable

– Portable diesel engines subject in 2010, but only if likely to pose a significant risk

• New substances and health values added

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Relationship Between “Hot Spots” and Statewide Regulations

• AB 2588 was landmark right-to-know law• Lessons learned from “Hot Spots” used to

develop statewide regulations (perc dry cleaners and chrome platers)

• Statewide regulation usually more cost- effective than individual facility evaluations

• Regulations able to address future risks from new sources

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“Hot Spots” Can’t Do Everything• Cumulative risk from multiple facilities is not

addressed• On-site mobile sources generally not included, but

risk can be significant• Only requires risk reduction, not emission reductions

– No neighbors... no significant risk... no controls required– Tall stack... toxics are diluted... fewer controls required

....Questions?

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CHAPIS Emissions

Maps

AQMIS Air Quality

Maps

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CHAPIS (Community Health Air Pollution Information System)

• Maps location of emissions sources • Includes mobile sources, consumer

products, and industrial/commercial facilities• Multiyear effort, collaboration with districts

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CHAPIS: Pick an Area of Interest – by Zip, County, Air District or Region

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Pick a pollutant, then zoom in

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ABC Company (12345)

Hover over triangle - shows facility name

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Link to ARB’s inventory for detailed emissions

ABC COMPANY INC.ABC COMPANY INC.

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Compare Toxics with Other Facilities

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Grids – combine mobile, areawide, and facility emissions

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ABCD Company

GHT Company

XYZ Company

Summarize emissions( graph and facility list )

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CHAPIS has links to Air Monitoring Data

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Air Quality and MeteorologicalInformation System (AQMIS)

• Provides “real time” and historical data from 200 ARB and district air monitoring sites

• Key pollutants are ozone and particulate matter

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AQMIS - Ozone and PM Trends

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Ambient Air Toxic Trends

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Environmental Justice

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Environmental Justice

• “Fair treatment of all people...”• ARB’s EJ Policies require EJ to be

considered in all decisions– Next is Climate Change and EJ impacts

• Focus on cumulative risk • Local land-use decisions always key factor

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Multimedia Maps for Special Projects

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Risk vs Distance

Source Category Advisory Recommendations - Avoid siting new sensitive land uses...

Freeways and High-Traffic Roads

within 500 feet of a freeway, urban roads with 100,000 vehicles/day, or rural roads with 50,000 vehicles/day

Distribution Centerswithin 1,000 feet of a distribution center (that accommodates >100 trucks per day, >40 trucks with TRUs/day, or where TRUs operate >300 hrs/wk).

Rail Yards within 1,000 feet of a major service and maintenance rail yard

Ports immediately downwind of ports in the most heavily impacted zones.

Refineries immediately downwind of petroleum refineries

Chrome Platers within 1,000 ft.

Perc Dry Cleaners within 300 feet of any dry cleaning operation.

Gasoline Dispensing Facilities

within 300 feet of a large gas station

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Links

• http://www.arb.ca.gov/ab2588/9-19-07.ppt (today’s presentation)

• http://www.arb.ca.gov/ch/handbook.pdf (air quality handbook) • http://www.arb.ca.gov/ch/ppgEnglish2005.pdf (public participation)• http://www.arb.ca.gov/ch/programs/complaint.htm (complaint resolution)• http://www.arb.ca.gov/ch/chapis1/chapis1.htm (emissions maps)• http://www.arb.ca.gov/toxics/harp/harp.htm (risk assessment software)• http://www.arb.ca.gov/ch/public_participation.htm (public participation guidebook)• http://www.arb.ca.gov/aqd/aqdpage.htm (ambient toxics data)• http://www.arb.ca.gov/ab2588/ab2588.htm (AB 2588 “Hot Spots”)• http://www.arb.ca.gov/app/emsinv/facinfo/facinfo.php (toxics data)• http://www.arb.ca.gov/app/emsinv/t25cat/display.php (top 25 sources)• http://www.arb.ca.gov/aqd/aqinfo.htm (air quality data)• http://www.arb.ca.gov/toxics/cti/hlthrisk/hlthrisk.htm (ASPEN maps)• http://www.arb.ca.gov/ch/espanol.htm (Spanish docs)• http://www.arb.ca.gov/ch/Draft_Wilmington_ChERRP_Multimedia_11_05.pdf (map)