Process Safety and ReliabilityOur process safety and reliability programs proactivelycontribute to our goal of operational excellence.These programs provide safeguards for certifyingour equipment is correctly designed, regularlymaintained and safely operated. Valero employsan industry-leading technical process safety andreliability assessment program to drive 昀椀rst-quartilereliability performance and help maintain the safetyof our employees and communities. We continue toevaluate and utilize state-of-the-art process controland equipment monitoring technology to optimizeoperations ef昀椀ciency.Through CTEMS, we have mature processes in place toanalyze PSEs. Understanding the reasons for a PSE is the昀椀rst step. We then take necessary actions to preventrepeat failures, address unreliable equipment orimprove speci昀椀c program expectations to ensure safeand reliable operations.Valero began developing a suite of technicalassessments over 10 years ago to inform the annualstrategic resource planning process and ensurecontinuous improvements are made in the mostimpactful areas. Below is a list of some of the mostmature technical assessments and focus areas:••••MAIN – Inspection and mechanical integrity.ESARN – Electrical systems.ROTO – Rotating equipment.PACE – Process automation and controlseffectiveness.• CYBER – Cybersecurity.• AOE – Alkylation operations excellence.• ORA – Operational reliability.These assessments leverage the expertise ofour technical subject matter experts who workalongside site champions to evaluate the design andeffectiveness of each site’s speci昀椀c reliability programs.The results identify areas of opportunity, whichare prioritized to help each site achieve our overalloperational excellence goals. Many of our more matureassessments were updated in 2023 to account forprogress driven through our CTEMS annual focus areasand site-speci昀椀c improvement plans. These updatedassessments will allow priorities and resources to shift toremaining opportunities and new emerging issues.Mechanical AvailabilityOur high mechanical availability rate is a result of our highly reliable re昀椀nery operations and isunderpinned by our CTEMS expectations of:• Avoiding unplanned downtime.• Implementing our structured turnaroundplanning process.• Minimizing environmental impacts.2023BEST YEAR EVER FOR• Ensuring ef昀椀cient use of resources.MECHANICALAVAILABILITYIn addition to our capital investments in reliability, our comprehensive reliability assessments,proprietary management systems and internal strategic planning process are essential in thereduction of environmental incidents and improving safety.In 2023, we achieved 97.4% re昀椀ning mechanical availabilitymaking it a new best-ever performance.97.4%97.5%97.0%96.5%96.0%95.5%95.0%2010382011201220132014201520162017201820192020202120222023
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