Partner in environmental quality At ExxonMobil, we are committed to operational excellence which means we take environmental responsibility and reducing our energy use seriously. It is our policy to conduct our business in a manner that is compatible with the balanced environmental and economic needs of the communities in which we operate. In order to stay competitive and meet ever-growing energy needs, ExxonMobil is focused on operating more efficiently. ExxonMobil Refinery received the Environmental Leadership Program (ELP) Large Business Achievement Award in Pollution Prevention for investing in a denitrification treatment step as part of a project to replace two Biox basins with new Biox tanks. The “tank-in-tank” design helps to reduce nitrate emissions in wastewater discharges to the Mississippi River well below levels required by the regulations thereby vastly improving the water quality in the Mississippi River. As a result of the installation of the Biox Basins Wastewater Treatment Project, the refinery was able to reduce nitrate emissions by 1.4 million pounds in 2015, greater than 80 percent nitrate removal compared to the previous year. The denitrification treatment step went well above and beyond regulatory requirements for wastewater treatment and remains consistent with Exxon’s efforts to proactively reduce nitrate emissions in wastewater discharges. Watch the awards on YouTube. Steam: a sign of care Steam plumes visible along the North Baton Rouge skyline, especially on cool mornings, are testimony to our ongoing effort to improve environmental performance. The largest plume rises above the wet gas scrubber where water "scrubs" out dust-like particles, sulfur dioxide and ammonia. Steam also rises above cooling towers where water is cooled and recycled. This steam is a visual sign of ExxonMobil’s efforts to protect our environment. Our relationship with the mighty Mississippi Our docks provide product transportation to and from ports around the world. This important facility is equipped to protect the river. For example, a marine vapor recovery system picks up hydrocarbon vapors from loading vessels, directs them into the recovery unit and destroys them, which reduces ozone precursors. The docks also have oil spill recovery boats staffed by trained response teams. We recognize Baton Rouge is growing, therefore its drinking water needs are growing. We have worked to expand the use of clarified river water to reduce the total amount of ground water withdrawal. In fact, we have reduced the use of groundwater by 600,000 gallons per day. We help understand and address the ozone problem We are committed to helping the city, parish, and Louisiana Department of Environmental Quality (LDEQ) understand and address the ozone problem. In addition to significant, sustained volatile organic compounds (VOC) and nitrogen oxides (NOx) emissions reductions over time, we have taken several steps to help solve the problem, including modifying operations to reduce emissions during Ozone Alerts and taking a leadership position in LDEQ/industry efforts to understand ozone formation. ExxonMobil Baton Rouge has also taken a leadership role by piloting the HAWK infrared camera, a cutting edge tool designed to “see” hydrocarbon emissions invisible to the naked eye. ExxonMobil was a leader in developing and field testing this technology, which is being used by the ExxonMobil Baton Rouge Complex as well as the LDEQ as a surveillance tool. Emission reduction efforts from ExxonMobil’s Baton Rouge facilities along with other area efforts helped the Baton Rouge area attain all federal air quality standards for the first time ever in 2008, 2009 and 2010. Technology Investing in environmental protection Historically, our Baton Rouge Complex was one of the early leaders in installing the wet gas scrubber (1976) and the flare gas recovery system (1982), which the U.S. Environmental Protection Agency calls the “hallmarks of pollution prevention for modern refineries.” In October 2010, ExxonMobil Baton Rouge completed its commissioning of a new unit to produce ultra low sulfur diesel. Together with another new unit at ExxonMobil's Baytown refinery, both units will enable ExxonMobil to increase the supply of ultra low sulfur diesel by over 3 million gallons a day from the refineries, and allow for reduced emissions from diesel consumption when used in modern engines. Wet gas scrubber What does it do? Located at the Refinery’s Fluid Catalytic Cracking (FCC) Unit, the wet gas scrubber uses water to capture particles that would otherwise go into the atmosphere by mixing gas with water to remove the pollutants. As an added benefit, the scrubber also reduces emissions of sulfur dioxide and ammonia. How does it work? High velocity jets add water to the gas coming from the Refinery’s CO furnaces, and the wet gas enters a separator drum. In the drum, the gas travels up, while the water carrying the pollutants travels down. On its way out of the stack, the “scrubbed” gas passes through a clean spray of water, which helps remove remaining solids, and then through a grid, which helps remove water droplets. Sensitive analyzers monitor the exiting gas to ensure the scrubbing process is working. Some of the water is recirculated back to the wet gas scrubber to be used again. The rest of it is sent to the settling ponds where the pollutants from the water are removed or neutralized. Sulfur recovery unit What does it do? The sulfur recovery unit collects and removes sulfur molecules from the gasoline, diesel, jet fuel and other fuels produced at the Baton Rouge Refinery. Purification (treatment) is the last step of the refining process and is necessary in order to improve quality of our finished products. Sulfur is a natural component of crude oil. Why is it important? The goal of the sulfur recovery unit technology and processes is to minimize the sulfur content in refinery fuel products. This is important for reducing vehicle emissions since sulfur is a catalyst poison for catalytic converters on vehicles. Catalytic converters are the primary method of reducing emissions from vehicle exhaust. How does it work? As a part of the refining process, the sulfur molecules are collected and directed to the sulfur recovery unit. There, several reactors and combustion devices convert the sulfur molecules into elemental sulfur. The elemental sulfur is useful because it can be further converted into ammonium sulfate, a fertilizer. Wastewater treatment facility What does it do? The Baton Rouge Refinery and the adjacent Chemical Plant each have wastewater treatment facilities that treat process wastewaters received from more than 50 miles of piping. How does it work? Primary treatment process consists of solids removal and neutralization which prepares the wastewater for biological treatment. Secondary treatment is the biological degradation of soluble organic compounds by microorganisms, commonly referred to as the “bugs.” After biotreatment, the microorganisms are separated from the water in a final clarification process, and the water is sampled as it is eventually discharged into the Mississippi River. Far better than the permitted limits The Baton Rouge Refinery and the Chemical Plant both have an excellent compliance record. The outflow to the Mississippi River not only meets the standards set by the Louisiana Department of Environmental Quality (LDEQ) but is far better than the permitted limits.