Remediation With heritage operations dating back to the early 20 th century, Lockheed Martin has built its success on long-standing innovation and business excellence as well as strategic acquisitions. Some of our operations conducted over the years, although in compliance with relevant laws at the time, resulted in soil or groundwater contamination. Where remedial actions are warranted, Lockheed Martin works collaboratively with regulatory agencies and communities to remedy the effect of the contamination. Currently, we have 73 active remediation projects across our operations. You can read more about our commitment to remediation on our Lockheed Martin Remediation website . Not only are we committed to taking effective remedial actions, but we also aim to make our remediation projects sustainable wherever possible. We do this by using innovative technological solutions like disposing of contaminants with waste to energy incineration and renewing the activated carbon that acts as a filter in many of our treatment plants by safely burning off contaminants. At several of our remediation sites in water-stressed areas, in cooperation with regulators we treat contaminated groundwater to such a high standard that the local water agency can then direct it into the potable water supply, providing water to over half a million homes in those service areas. PROTECTING WILDLIFE IN POTRERO CANYON, CA From the 1960s and early 1970s, Lockheed Propulsion Company operated a facility at Potrero Canyon in Beaumont, CA. Cleanup operations began at the site in 1986 and evolved as regulation of new chemicals expanded the remediation needed. In 2002, 1,4- dioxane and perchlorate were in the process of becoming regulated chemicals in California, resulting in testing at the site. These compounds were identified in the groundwater as a result of this and subsequent testing and remediation planning was initiated. After considering several remediation alternatives, Lockheed Martin was able to propose an effective solution that minimized disturbance of the site. The California Department of Toxic Substances Control approved this solution. Lockheed Martin constructed a system to treat 1,4-dioxane from one groundwater extraction well, and natural biodegradation provided by the native wetlands habitat was deemed highly effective at treating perchlorate. The use of this natural remediation process provided environmental benefits of minimizing the environmental footprint when compared to more traditional remediation technologies and processes. Lockheed Martin also installed a solar-powered pump to direct water from a well into existing topographic depressions. These depressions can provide a permanent water source for the tricolored blackbird, which is native to the area and classified as threatened in California. INNOVATIVE REMEDIATION TECHNOLOGY In New York, we are piloting a new treatment technology for per- and polyfluoroalkyl substances. This new treatment system consists of a portable, containerized, continuous water treatment system that relies on a natural phenomenon called foam fractionation to separate the per- and polyfluoroalkyl substances from impacted water. The natural physiochemistry of per- and polyfluoroalkyl substances compounds allow them to adhere to fine air bubbles and be removed from the environment. The system can remove and concentrate per- and polyfluoroalkyl substances from 660,000 gallons of water to a single cup of per- and polyfluoroalkyl substances concentrate, with no extra waste generated, making it a highly sustainable solution. About this Report Our Company Our Sustainability Approach Our Sustainability Priorities Beyond the SMP ESG Performance Index www.lockheedmartin.com 2021 Sustainability Report 52