WATER CONSERVATION Water is an essential resource in our manufacturing facilities and processes. All our refining assets have on-site water treatment systems, many of which use available brackish, saltwater or non-freshwater resources, as well as solutions that involve industrial reuse processes. In North America and the United Kingdom, we operate 12 biological treatment plants and 15 pre-treatment facilities. Phillips 66 researches and develops best practices for water use to ensure that we will have sufficient, sustainable water resources well into the future, and we are responsibly managing this critical natural resource. We also evaluate new technologies and products to decrease our water footprint by recycling more water, and we collaborate with research institutions to solve water challenges. To meet and exceed the strict requirements of the National Pollutant Discharge Elimination System, or industrial pre-treatment permits, we have improved our water management procedures, setting higher environmental performance standards, minimizing plant upsets, and reducing chemical use and waste generation. We have developed leading Key Performance Indicators as part of our water use efficiency program for our facilities, including condensate returned to steam produced and condensate recovered versus consumed in the process. Our refineries produce 15 million pounds of steam per hour. Each pound of steam is more than a pound of water, which is why we’re working to optimize our use of steam and minimize losses. As part of our DOM program, we’re rolling out an optimization tool to all our refineries. The tool allows operators and engineers to see the entire steam system and provides prescriptive actions to use the steam and minimize loss from venting. This is expected to help us recover 250 million pounds of steam a year. Using Technology to Save Water Pilot program reduced water usage and saved energy costs. Our Billings and Bayway refineries implemented steam trap monitoring as part of the DOM program. Using hand-held acoustic sensors coupled with a cloud-based analytics program, steam traps were periodically tested. Initial surveys identified areas for prioritized maintenance. Repairing the identified traps netted $1.3 million per year savings in energy costs at the two facilities. The work also helped improve third-party energy intensity performance statistics and reduce GHG emissions. Three additional refineries will start the program in 2022 and remaining refineries are scheduled to be included in 2023. $1.3 million saved in 2021 energy costs by reducing steam losses at Billings and Bayway refineries Closed-circuit Reverse Osmosis We repurposed a conventional reverse osmosis unit to use closed-circuit reverse osmosis (CCRO) to treat about 900 gallons per minute (GPM) of concentrated brine for use in boilers. CCRO works like a cooling tower that cycles water until it reaches a set salt content, at which point it blows down the brine while continuing to generate clean water. We see results in significantly improved cooling tower cycles, and the annual raw water demand for Borger's boilers is down by 473 million gallons. 473 million gallons of water saved through CCRO at the Borger Refinery Environmental Stewardship 31 ENVIRONMENT AND SAFETY