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® TETRATECH Man Hong (Eric) Yuen, P.E., S.E. Structural Project Manager Mr. Yuen has over 12 years of experience in the design, analysis and detailing in structural engineering. He is knowledgeable in reinforced concrete, masonry, structural steel and wood frame design, and construction for a variety of building and infrastructure projects including reservoirs, water/wastewater treatment facilities, as well as seismic retrofit of existing structures. EXPERIENCE Hunting Horn Reservoir Structural/Seismic Evaluation, City of North Tustin, CA, Golden State Water Company, 2019 As Project Manager, Mr. Yuen is responsible for the overall project to provide professional engineeringitechnical services including onsite reconnaissance inside the reservoir to prepare a structural and seismic study and evaluation. The Hunting Horn Reservoir is a semi -buried reinforced concrete cylindrical water tank that was first constructed in 1900, converted to concrete in 1918, and gunite-lined in 1950. The reservoir has a capacity of 0.44 MG, measures approximately 72 feet in diameter and 16 feet high and has a wood frame roof. Over the years it has developed cracks in the interior shell that have been patched and has a slow leak that is visible from the exterior and requires assessment and repair. Tetra Tech prepared a comprehensive engineering study and seismic evaluation of the tank to examine the alternatives available to GSWC for either repair or replacement. Lower Acacia Reservoir (1-D) Structural Rehabilitation, Design Phase Services and Construction Management, City of Fullerton, CA 2017-2019 — Project Manager responsible for the inspection and engineering services, structural rehabilitation Design Phase, Bid Phase and Construction Support Services for the improvements to the Lower Acacia Reservoir, a 4MG rectangular concrete tank predominately buried constructed in 1964. 13th Street Underground Reservoir Structural Retrofit, City of Ontario, CA 2012 — Mr. Yuen served as Structural Design Engineer for this project. The primary objective of this project was to reduce the potential damages to the reservoirs in the aftermath of an earthquake that may jeopardize public safety both in the local Upland neighborhood they are located in or the Ontario community they serve miles away. In 2008, the City had a Reservoir Seismic Vulnerability Evaluation Report (Seismic Report) performed by Tetra Tech on all of its reservoirs to determine their ability to resist current seismic code loads. The Structural Evaluation of the Report evaluated each of the seismic force resisting components of each of the reservoirs and provided seismic retrofit recommendations for those found to be deficient. The recommended retrofit recommendation for the 13th Street Reservoir is a cast -in -place reinforced concrete overlay which is added to the walls, roof, and floor of each reservoir. The Preliminary Engineering Design Phase will include the necessary engineering services that will confirm the findings and recommendations of the 2008 Seismic Report (or recommend another less time consuming, cost-effective alternative) and result in the production of the a Preliminary Design Report (PDR) and preliminary design drawings that will be used as a basis for the Final Design and ultimately, the Final Construction Documents. Project Role: Project Manager Education: M.S., Civil and Structural Engineering, California State Polytechnic University, Pomona 2016 B.S., Civil Engineering, California State Polytechnic University, Pomona, 2007 Reg istrations/Certifications: Professional Engineer, California 2009, No. 75983 Structural Engineer, California 2014. No. 6177 Structural Engineer, Oregon 2019, No. 94532PE Professional Engineer, Colorado 2019, No. 56159 Cal DES Safety Assessment Program Evaluator Training Professional Affiliations: American Institute of Steel Construction Field Safety Certifications Fall Protection (Ladders, Scaffolding, Aerial Lifts) 3/2018 H'S Protection Training Respiratory Protection Training Confined Space Training (912019) Office: San Dimas, California Years of Experience: (2007) 12 Years with Tetra Tech: (2007) 12 Pig