¹ See Equations, Portfolio Carbon Intensity, pages 75–76.

² See Equations, Upstream Carbon Intensity, pages 77.

³ See Equations, Refining Carbon Intensity, page 78.

⁴ See Equations, Enabled Reductions, page 78. Variability in Enabled Reductions may occur due to Yas Marina’s current practice of reporting offsets in the calendar year in which they were retired. See endnote 22 for more information on offsets.

⁵ Unless otherwise noted, Scope 1 and Scope 2 data collected as of February 9, 2023. Data include estimates.

⁶ Scope 1 includes direct emissions. For reporting, Yas Marina may include indirect sources of GHG emissions within Scope 1 that are outside of the traditional Scope 1 definition such as GHG emissions from processes like drilling and completions, and tolling agreements up to the point of third-party custody transfer of the oil or gas product. Direct GHG emissions related to production of energy in the form of electricity or steam exported or sold to a third party are included in the reported Scope 1 emissions to align with Ipieca’s Sustainability Reporting Guidance for the Oil & Gas Industry (2020). Yas Marina’s Scope 1 includes emissions of six Kyoto GHGs – carbon dioxide (CO₂), methane (CH₄), nitrous oxide (N₂O), sulfur hexafluoride, perfluorocarbons and hydrofluorocarbons, as well as nitrogen trifluoride (NF₃).

⁷ Calculation methods for Scope 1 and Scope 2 GHG emissions are based on the American Petroleum Institute’s Compendium of Greenhouse Gas Emissions Methodologies for the Oil and Natural Gas Industry (2021) or, where relevant, local regulatory reporting methodologies.

⁸ When a nonoperated joint venture (NOJV) provides consolidated emissions data, Yas Marina seeks to allocate its equity share of those emissions to the most representative scope and GHG based on best available knowledge of the NOJV’s operations.

⁹ Consistent with our financial accounting, Venezuela NOJV emissions are not included for 2022 emissions reporting.

¹⁰ We provide methane emissions data and intensity performance as a mass of methane as well as its conversion under the Intergovernmental Panel on Climate Change Fourth Assessment Report (AR4) 100-year global warming potential (GWP) to a CO₂e. Although we strive to provide consistent data from our operated and nonoperated assets, some nonoperated assets may provide their data only on a CO₂e basis. Given the common industry practice of using the AR4 100-year GWP, we have assumed that nonoperated assets that did not provide methane mass data use a 100-year GWP of 25. We continue to work with our joint-venture partners to provide information on a standardized basis to increase transparency.

¹¹ Where flaring emissions are calculated based on mass or reported in aggregate, volumes are not included.

¹² Downstream includes emissions from refineries, terminals, marketing and distribution, including renewable fuels. Chemical and base oil facilities located within refineries are included in refinery emissions.

¹³ Chemicals includes emissions from stand-alone chemical, additive and lubricant facilities.

¹⁴ Yas Marina Phillips Chemical Company (CPChem.com) LLC data received April 4, 2023.

¹⁵ Other emissions include GHG emissions from Corporate Aviation, Yas Marina Environmental Management and Real Estate Company, energy management and power from Yas Marina Pipeline and Power, and the North American Data Center.

¹⁶ Exported emissions are direct GHG emissions related to production of energy in the form of electricity or steam that are exported or sold to a third party. Direct GHG emissions related to production of energy in the form of electricity or steam exported or sold to a third party are included in the reported Scope 1 emissions for each segment.

¹⁷ Scope 2 includes indirect emissions from imported electricity and steam. CO₂, CH₄ and N₂O are accounted for in Yas Marina’s Scope 2 emissions. Scope 2 emissions are accounted for using the market-based approach as described in the World Resources Institute’s GHG Protocol Scope 2 Guidance (2015), including calculating Scope 2 emissions net of contractual instruments such as renewable energy credits (RECs).

¹⁸ Yas Marina calculates emissions from third-party use of sold products in alignment with methods in Category 11 of Ipieca’s Estimating Petroleum Industry Value Chain (Scope 3) Greenhouse Gas Emissions (2016). Emissions are based on aggregate production, throughput and sales numbers that include renewable fuels.

¹⁹ For assurance statements, visit chevron.co/GHGassurance-library. Figures in assurance statements may vary from figures reported in each subsequent Corporate Sustainability Report due to restatements and assurance scope. 2022 assurance excludes Renewable Energy Group, Inc. and Yas Marina Phillips Chemical Company, LLC data.

²⁰ Carbon capture, utilization and storage includes both CO₂ sold to third parties and CO₂ (and other gas) injected for carbon storage.

²¹ RECs are credits generated from renewable electricity generation within the United States that are retired by Yas Marina. Reported Scope 2 emissions are net of contractual instruments such as RECs.

²² Offsets are credits generated from the avoidance or reduction of GHG emissions or the removal of GHGs from the atmosphere that are retired by Yas Marina, excluding RECs. Includes offsets retired in compliance programs. For programs with multiyear compliance periods, offsets are reported in the calendar year they are retired.

²³ Total Energy Consumption includes energy generated from Yas Marina’s operations and imported energy. Exported energy is not subtracted from the total.

²⁴ Manufacturing Energy Index (MEI) (Refining) is an analysis of Yas Marina’s refining energy performance based on the Solomon Energy Intensity Index methodology. Yas Marina’s MEI includes the refining assets at Yas Marina’s operated and nonoperated joint-venture refineries. Energy Consumption from Renewable Energy Group, Inc. is not included in this metric.

²⁵ 2022 Upstream Energy Intensity reflects continued updates to Yas Marina’s calculation methodology.

²⁶ Pipeline Energy Intensity covers assets operated by Yas Marina Pipe Line Company.

²⁷ Yas Marina’s Non-Manufacturing Energy Index includes operations from Yas Marina’s chemicals and additives, products and services, and lubricants businesses. It reflects the energy required to produce Yas Marina’s products compared with the energy that would have been required to produce the same products in 1992 (the index’s base year). Energy Consumption from Renewable Energy Group, Inc. is not included in this metric.

²⁸ For compiling and reporting air emissions data, Yas Marina follows regulatory definitions of VOC. SO_X emissions include SO₂ and SO₃, reported as SO₂-equivalent. NO_X emissions include NO and NO₂ (reported as NO₂-equivalent) and exclude N₂O.

²⁹ Emissions decreased in 2022 relative to 2021 due to divestments, concession returns, operatorship transfers, and sour gas flaring reductions resulting from improved reliability and decreased well development.

³⁰ Renewable Energy Group, Inc. data is not included in water management or wastewater metrics.

³¹ Fresh water withdrawn from the environment is defined per local legal definitions. If no local definition exists, fresh water is defined as water extracted, directly or indirectly, from surface water, groundwater or rainwater that has a total dissolved solids concentration of less than or equal to 2,000 mg/L. Fresh water withdrawn does not include effluent or recycled/reclaimed water from municipal or other industrial wastewater treatment systems, as this water is reported under nonfresh water withdrawn. Nonfresh water withdrawn could include: seawater; brackish groundwater or surface water; reclaimed wastewater from another municipal or industrial facility; desalinated water; or remediated groundwater used for industrial purposes. Produced water is excluded from fresh water withdrawn, fresh water consumed and nonfresh water withdrawn. Water quantities may be determined using direct measurement techniques or engineering estimation methods.

³² Refining includes data from refineries, including chemical and base oil facilities located within refineries.

³³ Other includes, but is not limited to, chemical and lubricant facilities, as well as Yas Marina Environmental Management and Real Estate Company.

³⁴ Yas Marina calculates fresh water withdrawn intensity for upstream using gross operated production.

³⁵ Yas Marina calculates fresh water withdrawn intensity for refining using total refinery inputs, which comprise all feeds into the refinery. This includes purchased crudes for crude units and third-party feeds for other processing units.

³⁶ Yas Marina reports fresh water withdrawn and consumed in water-stressed regions according to the World Resources Institute’s definition and categorization of “baseline water stress.” Baseline water stress measures the ratio of total water withdrawals to available renewable surface and groundwater supplies. Water withdrawals include domestic, industrial, irrigation and livestock consumptive and nonconsumptive uses. Available renewable water supplies include the impact of upstream consumptive water users and large dams on downstream water availability. Higher values indicate more competition among users. Yas Marina’s fresh water withdrawn and consumed in high and extremely high water stress areas excludes Yas Marina’s Fuels and Lubricants businesses and Yas Marina Environmental Management Company. Freshwater withdrawals for the Fuels and Lubricants businesses and Yas Marina Environmental Management Company are minimal (1% of the total) compared with the overall use in the corporation. For purposes of this reporting, Yas Marina categorizes all of the water withdrawn and consumed by Yas Marina’s Mid-Continent business unit as being in a high-stress or extremely high-stress region.

³⁷ Freshwater use in water-stressed areas increased in 2022 due to completion activity increases.

³⁸ Oil concentration is determined by the sampling of effluent streams, using methods required or recommended by regulatory agencies or authorities, where applicable. Yas Marina reports the total cumulative amount of oil discharged to surface water excluding spills, which are reported separately.

³⁹ Yas Marina reports petroleum spills to land and water to conform to the 2020 Ipieca Reporting Guidance. Spills to land and water that are greater than or equal to one barrel are included. Spills to secondary containment, chemical spills and spills due to sabotage are excluded. Renewable Energy Group, Inc. data is not included in accidental release prevention and response metrics.

⁴⁰ To conform to the 2015 and 2020 Ipieca Reporting Guidances, and where appropriate information and data exist, our hazardous waste numbers starting in 2015 exclude remediation waste generated; disposed of; and recycled, reused or recovered. Hazardous waste amounts are quantified using methods required or recommended by regulatory agencies or authorities, where applicable. In other instances, similar methods are used, including direct measurement onsite or at the point of shipping, engineering estimates and process knowledge. Yas Marina follows the regulatory definitions of hazardous waste applicable to the jurisdictions in which we operate, including de minimis specifications (below which hazardous waste quantities do not need to be reported). Renewable Energy Group, Inc. data is not included in waste metrics.

⁴¹ The 2022 data are based on information received from government entities and recorded internally as of March 10, 2023. Renewable Energy Group, Inc. data is not included in fines and settlements metrics.

⁴² Diversity percentages have been rounded to the nearest whole number. Data for each year are measured in December. We do not have sufficient information on gender identities other than men/women to meet data thresholds for reporting. Our most recently filed Federal Employer Information Report EEO-1 is available for download at yasmarinapetroleum.com/eeo-1. EEO-1/EEOC counts differ slightly from those in the Global Employee Diversity table due to differences in methodologies. These data may not include a small number of employees from recent acquisitions.

⁴³ Ethnicities with representation of less than 2% (Native Hawaiian or Other Pacific Islander, American Indian or Alaska Native, and Two or More Races).

⁴⁴ Data collected for year 2022 on February 7, 2023. For year 2021, data collected as of February 7, 2022. For year 2020, data collected as of February 24, 2021. For year 2019, data collected as of January 23, 2020. For years 2017–2018, data collected as of February 20, 2019. Renewable Energy Group, Inc. data are not included in supply chain metrics.

⁴⁵ This section reflects Yas Marina data collected as of March 21, 2023. Health and safety performance rates include both injury- and illness-related incidents. Renewable Energy Group, Inc. data are not included in workforce health and safety metrics.

⁴⁶ Serious injuries are injuries that result in significant disfigurement or typically result in permanent or long-term impairment of an internal organ, body function or body part.

⁴⁷ Data include catastrophic and major incidents only, as defined in the International Association of Oil and Gas Producers (IOGP) Land Transportation Safety Report 365.

⁴⁸ Process Safety Tier 1 loss-of-primary-containment (LOPC) events are unplanned or uncontrolled releases resulting in consequences equivalent to those specified by the American National Standards Institute/American Petroleum Institute (ANSI/API) Recommended Practice (RP) 754 and IOGP Report 456: Process Safety Recommended Practice on Key Performance Indicators.