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# Animal Feeding Operations Air Program Update Presented By: William Schrock Farm, Ranch, and Rural Communities Federal Advisory

Committee March 13, 2008 Wa shington, DC2



# Background Information • EPA & USDA asked National Academy of Science (NAS) to conduct the AFO air emissions study • NAS study conclusions: – No reliable emission factors for AFO exist – Additional data needed to develop estimating methodologies – Current methods for estimating emissions not appropriate – Use process - based approach3 

# Goals for Next 2 - 3 Years • Address issues of CAA requirements – Emission estimation (e.g., emission factors, potential to emit) – Source definition – Applicability cutoff (i.e., size cutoff) – Fugitive/non -fugitive – Control technology effectiveness – Monitoring, reporting and recordkeeping4 

# • Consent agreement developed in response to: – Public concerns – NAS report 

# • Consent agreement developed by: – EPA – Industry representatives 

# • Proposed agreement coordinated with: – Agricultural industry representatives – State & local government officials – Environmental organizations – Citizen groups 

# Agreement Overview5



# Monitoring Study - Signups • EPA received approximately 2,700 agreements representing over 13,000 farms. **Num be**  **r of Fa rms** 

**R ep**  **re se**  **nt ed** **in A FO**  **Co ns**  **en t**  **Ag re**  **em en**  **t** Dair ies, 4% of a ll Far ms Sw in e, 42% of

a ll Far ms Broi le rs , 35% of

a ll Far ms Lay ers, 1 9% of

a ll Far ms6 

# Monitoring Study - Overview • Purpose: gather data for developing emission estimating methodologies • Funding provided by participating AFOs - $14.8M • Monitor for: – Particulate matter – Hydrogen sulfide – Volatile organic compounds – Ammonia • Data made available to the public7



## Monitoring **Study –**  **Site Selection**8 

# Monitoring Study – The Challenges Changing Climatic Conditions Partially Enclosed and Naturally V entilated Changing Feed Rations Animal Movements Large Open Sources9



# What’s Next? • Continue Data collection – Spring/Summer/Fall 07 + 2 years • Complete data analysis and publish Emission Estimating Methodologies – 18 months after completion of data collection • Participants must comply with any applicable requirements – 120 days after publication of Emission Estimating Methodology10



# Add -on Studies **Principal Investigator**  **To pic/Sponsor**  **Site(s) Jacobson**  Odor Emissions/USDA NRI IA4A, OK4A, IN5B, & WI5B **Mitloehner** VOCs & GHGs/CA Dept Food & Ag, Dairy CA5B **Lim** Downwind Dairy Odor Survey/Purdue IN5B **Ni** Air Emissions/USDA NRI IN2B **Koziel** GHG/ISU IA4B **Jacobson** GHG emissions (University of Minnesota) WI5B **Zhang** GHG emissions (CARB) CA1B, CA2B **Wa ng**  PM size distribution (USDA-NRI) NC2B **Ndegwa** Bioaerosols (PNASH) WA5B11 

# Future Outlook for AFO Strategy • National Academy of Sciences developed recommendations to characterize all AFO processes. • Consent Agreement/Monitoring Study is just one piece of overall strategy. • Modifications to one area of an AFO can have impacts on another area and another media. • Air Office still needs to consider the following: – Regulations and/or guidance – Conservation practices (conservation systems and activities, technologies) – Emission estimating methodologies – short term – Process based emission model – long term