WEST YOST ASSOCIATES (#2027082) - Laserfiche WebLink

Todd Yamello May 26, 2026 Page 5 Task 3 Assumptions • City will provide existing instrumentation asset inventories, record drawings, PLC backups, O&M manuals, and related documentation at the start of the task to support review and recommendations. • SCADA Graphical Standards Development is limited to documenting existing AVEVA InTouch standards as currently used within the SCADA environment. Modifications and additions to graphical templates are not included. • HMI Database Conventions Standards Development is limited to documenting existing database conventions as currently implemented. • Control strategy development will focus on major facilities and representative remote sites; minor facilities may be documented at a higher level unless otherwise directed. • Field verification will be limited to targeted site visits (up to 16 hours) and will not include forensic validation of wiring or PLC logic. • City staff will be available to participate in workshops and will provide applicable SCADA and PLC backup files prior to beginning the task. Task 3 Deliverables • West Yost will provide a Draft & Final SCADA Standards document that includes components as outlined above. Task 4. Backup Core SCADA Server Relocation Basis of Design and Cost Estimate The objective of this task is to investigate and define the scope, level of effort, and planning-level cost required to implement Project P1-2 – Backup Core SCADA Server Relocation. This task will not include implementation of the relocation project, but will instead establish the technical framework, design criteria, and budgetary estimate necessary for future execution. Work activities under this task include: • Core SCADA Server Relocation Basis of Design – West Yost will develop a Basis of Design for relocating the core SCADA server environment. Work will include reviewing existing server, virtualization, network, storage/backup, power, and room layout conditions based on available documentation and coordination with City IT and Utilities staff. West Yost will define relocation objectives and design criteria, including redundancy, cybersecurity, physical security, environmental controls, power resiliency, operational continuity, and potential backup server locations. West Yost will also develop a high-level implementation approach addressing sequencing, outages, testing, cutover, rollback, and coordination requirements to reduce operational risk during future implementation. • Planning-Level Cost Estimate Development – West Yost will prepare a planning-level cost estimate consistent with an AACE Class 5 estimate. The estimate will include anticipated costs for hardware procurement, software licensing (if applicable), network modifications, electrical upgrades, environmental improvements, professional services, testing, commissioning, and contingency. Docusign Envelope ID: C46F6467-48FC-8755-8247-09E863327CA7Docusign Envelope ID: A1F306CD-3D85-8219-8045-1E730ABF3862