25B - AGMT FOR ENGINEERING SERVICES

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Develop detail work plan, including a detailed schedule of tasks, prepare monthly progress reports, track and monitor project budget and schedules, and provide overall quality assurance and control review. Beyaz & Patel and our team of subconsultants will meet with Key City staff for a project kick off meeting. We will review project requirements, identify milestones, and critical path items in accordance with the goals and objectives for the project. Beyaz & Patel will facilitate the meeting, prepare an agenda and distribute meeting minutes. We will prepare a schedule for the Cit f s review. The schedule will be updated as required by the project. A minimum of four (4) project meetings will be scheduled throughout the project TASK 2— PRELIMINARY ENGINEERING SERVICES Our team will collect and review pertinent record information and documents including, geotechnical reports, as -built drawings, and the most recent dive reports and may involve working with City staff upon their availability to obtain records. TASK 3.0 - FIELD SERVICES Field services will include interior and exterior inspections of the reservoirs and investigation by structural, geotechnical, corrosion, cathodic, dive inspector, security and coating consultants. The inspections will be provided by staff and team members with AWWA and confined space entry certification. 3.1.1 Corrosion and Cathodic Protection: Our team will review existing reports, as -built drawings, and dive studies to help determine the general condition of the internal concrete, particularly on the submerged reservoir walls and floor. Conduct visual inspection of each reservoir interior after the reservoir has been taken out of service, drained, and made accessible for inspection. The results of this inspection will include: a map of obviously distressed areas on each concrete reservoir; characterization of each crack, flaw, spall or rust bleed in terms of minor, moderate and significant; Conduct coating inspection/testing of internal metallic appurtenances such as inlettoutlet piping, overflow piping, etc. Additionally, a visual inspection of the metal surfaces will be conducted and pit depth measurements and ultrasonic thickness (UT) measurements will be taken (where required). 3.1.2 Where warranted, conduct additional non- destructive internal inspections. These inspections may include: concrete rebound/sounding test by way of a steel rod or ball peen hammer (ASTM D4580). Where dull sounds are found, the area will be marked out for further investigation and/or repair. 2.2 Concrete to rebar cover testing using a Rebar Detection System (Proceq Profometer or similar). This will help to determine how much of the concrete has been degraded and may need future repairs. 2.3 Isolated half -cell potential testing (ASTM 876) where feasible and at visibly distressed areas to determine areas of active embedded reinforcement corrosion. Note that this testing will require access to two or more areas of exposed rebar (to be provided by others) in order to confirm that the embedded rebar is electrically continuous. 2.4 pH testing of concrete to determine if concrete has potentially lost passivity. 3.2 Diving Inspections • The dive inspection and testing required for the concrete reservoirs assumes that the tanks will be taken out of service and cleaned for the inspection and testing. Additionally, all confined space requirements (air monitor, permits, etc.) as well as ladder, entry/access, etc. (with the exception of a raft) will be provided by the City. I. External visual inspection of the exposed shell and roof ; 2. Internal Inspection of all surfaces including the roof underside/beams/shell/floor and all appurtenances; 3. Pit depth measurements in areas of active corrosion; 4. Damage from corrosion or other sources; 5. Measurement of sediment accumulation (sample to be taken if desired); 6. General conditions with regard to health and safety; 7. Physical evaluation of the cathodic system if present; 8. Check for evidence of earthquake damage; 9. Deficiencies in relation to current safety codes; 10. Leak testing /evaluation; 11. Remove sealant sample for testing. Sample site to be patched with NSF 61 approved epoxy (Aquatapoxy); 12. Take additional measurements as required. Our team will provide: One potable water dive team; decontamination procedure and materials; all diving equipment— diving to be performed with dedicated for drinking water only dry suits; digital still cameras and underwater strobes; Color Video Cameras and lighting; We will require from the city: All keys necessary to access the site and the roof hatches; all exterior ladders required to reach the roof; raised water levels at the time of boat inspection to allow a thorough roof evaluation. 3.3 Civil and Mechanical Inspection Our civil engineering and mechanical subconsultant, Dudek will visit each reservoir site w observe and document the condition of the exposed piping, valves, expansions joints, and associated appurtenances associated with the inlet, outlet, drain, and overflow pipes between the connection m the reservoir structure and nearest isolation valve (up m 20 feet away). Piping within on -site vaults or pumping facilities is not included in this assessment. TASK 4 — ENGINEERING SERVICES Beyaz & Patel will summarize findings in a seismic, structural and corrosion and security assessment Master Report of the concrete reservoirs. This includes the following elements: Structural and Seismic Evaluation Following completion of the field investigation, Beyaz & Patel will perform the seismic analysis for each reservoir/site to identify deficiencies as reviewed against applicable codes and standard such as CBC 2019, ACI 350 and AWWA The seismic analysis for the liquid inside the tank will conform to AWWA D-100, which is based on a two degree of freedom system (2DOF). The two degree of freedom refers to the impulsive and convective components in a seismic event The impulsive component is the liquid that is constrained at the lower portion of the reservoir. The convective component is portion of liquid that is at the upper portion that sloshes. The effect of these liquids will be analyzed and the corresponding hydrodynamic stresses calculated. Peak ground accelerations (PGAs) for each reservoir site will be obtained through the location of longitude and latitude of each reservoir from Beyaz &Patel 25B-26 Statement of Qualifications I Page 6