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Center for Energy Studies Completes Port Fourchon Emissions Research

The “Port Fourchon Ozone Day Port-Related Emissions Inventory Study,” prepared for ExxonMobil, presents initial estimates of the mobile source emissions associated with operations in and around the port. The inventory was provided to the Louisiana Department of Environmental Quality (DEQ) and the Baton Rouge Ozone Task Force to be used in regional ozone modeling to support the DEQ’s Non-attainment State Implementation Plan (SIP) for ozone.

A previous analysis of regional ozone modeling in the Baton Rouge area in 2007-2008 indicated an unaccounted for source of oxides of nitrogen (NOx) emissions thought to be originating along the Gulf Coast of Louisiana. NOx emissions are considered a precursor to ozone. Port Fourchon, which serves approximately 90% of all deepwater and 45% of shallow water rigs and platforms in the Gulf of Mexico and is the only port to serve the Louisiana Offshore Oil Port (LOOP), was considered a likely source of the emissions.

CES and Starcrest developed an initial inventory of NOx emissions using data representing three days in June and August 2009. Other pollutants measured include volatile organic compounds (VOCs), carbon monoxide, sulfur dioxide, particulate matter, and carbon dioxide.

CES professional-in-residence Mike D. McDaniel and research associate Kathryn Perry performed data collection for the inventory. Emissions sources included marine vessels that docked at Port Fourchon berths or passed through the port; cranes and cargo handling equipment; heavy-duty trucks; helicopters; and offshore emissions measured by the Minerals Management Service (now the Bureau of Ocean Energy Management, Regulation and Enforcement).

“The emissions inventory will enhance the accuracy of regional ozone modeling, which will be important for LDEQ in developing an effective ozone attainment plan,” McDaniel said.

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