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Exhibit A AWIA Requirements for Community Water System RRAs and ERPs AARCADIS The assessment may also include an evaluation of capital and operational needs for risk and resilience management for the system. To assist utilities, the AWIA directs the EPA to provide baseline information on malevolent acts of relevance to community water systems no later than August 1, 2019. This information must include consideration of acts that may— (1) substantially disrupt the ability of the system to provide a safe and reliable supply of drinking water; or (2) otherwise, present significant public health or economic concerns to the community served by the system. " No later than six months after certifying completion of its risk and resilience assessment, each system must prepare or revise, where necessary, an emergency response plan that incorporates the findings of the assessment. The plan shall include— (1) strategies and resources to improve the resilience of the system, including the physical security and cybersecurity of the system; (2) plans and procedures that can be implemented, and identification of equipment that can be utilized, in the event of a malevolent act or natural hazard that threatens the ability of the community water system to deliver safe drinking water, (3) actions, procedures, and equipment which can obviate or significantly lessen the impact of a malevolent act or natural hazard on the public health and the safety and supply of drinking water provided to communities and individuals, including the development of alternative source water options, relocation of water intakes, and construction of flood protection barriers; and (4) strategies that can be used to aid in the detection of malevolent acts or natural hazards that threaten the security or resilience of the system. Community water systems must, to the extent possible, coordinate with local emergency planning committees established under the Emergency Planning and Community Right -To -Know Act of 1986 (42 U. S. C. 11001 et seq.) when preparing or revising a risk and resilience assessment or emergency response plan under the AWIA. Further, systems must maintain a copy of the assessment and emergency response plan (including any revised assessment or plan) for five years after certifying the plan to the EPA." Per AWIA requirements, the Department is considered a large community water system (serves 100,000 people or more). As required for compliance with AWIA regulations, an all -hazards approach will be followed, and the RRA and ERP updates will build upon and expand work conducted by the Department for the inaugural cycle of AWIA in 2019-2020. For this cycle of compliance, Arcadis will validate existing risk model data and leverage our knowledge of current regulatory requirements to facilitate discussions and continue improving the Department resilience. This will include consideration of resilience and mitigation measures for the water system water treatment plants, pipes, and infrastructure, monitoring and cybersecurity, financial infrastructure, use and management of chemicals, operation and maintenance, hydrologic changes, organizational capital and finance elements, and relevant hazards and threats. The Department is also updating its ERP and key RRA information will be carried forward regarding water system risks, hazards, threats, mitigation measures, and cybersecurity in consideration of excluding secure information categorized based on a need -to -know basis. As part of the update, Arcadis will follow revised and new versions of USEPA and American Water Works Association (AWWA) guidance including the J100-21 standard and associated operational guide, Baseline www.arcadis.coni