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Armando Fernandez. PE November 17. 2022 Page 2 Our detailed understanding and scope of services was developed by our Team based on our successfully completed PFAS studies and design projects. In our approach to the study phase of the project we propose to review each well site and determine if it should be considered for a single well site design or be combined into a centralized system. We will determine if the existing well pump and motor is large enough to pump through the proposed PFAS plant and piping system. On centralized systems we will prepare a hydraulic model to determine the required pump and motor sizing to determine if the system is the most cost effect option. Our scope of services includes the required coordination, reports and design needed to obtain a California Division of Drinking Water (DDW) permit. The Tetra Tech team assigned to this project brings the following important advantages to this contract: ■ We have studied and designed PFAS Plants on single well sites and Centralized Treatment Facilities to serve multiple wells on a single site. Our team knows how to model, size and design well field connecting piping on busy urban streets. ■ We bring extensive local experience including four completed studies and six completed PFAS system designs. Our Headquarters Project for Yorba Linda Water District is the largest PFAS IX plant in the United States and the winner of both the ASCE Orange County Branch and ASCE Los Angeles Region Project of the Year. ■ We have obtained permits for similar PFAS projects from the DDW, other State and local agencies. We have obtained three permits from the Santa Ana DDW office for IX PFAS treatment plants. ■ Our team will use 3D modeling in all our design efforts to allow the City staff to visualize what your completed project will look like as we progress with the design. We have reviewed the City's Sample Standard Agreement attached to the Request for Proposal and concur with the provisions contained in the Agreement. Additionally, this proposal shall remain valid for a period of not less than 120 days from the date of submittal. Tetra Tech and members of our team for this project have worked together with the City on water projects for over 30 years. Let us assure you that our entire team understands the importance of this project. As Tetra Tech's client manager, I promise to ensure that our work will not only be timely but also of the highest -quality that the City expects and deserves. If you have any questions, please feel free to contact Steve Tedesco, our sole source of contact at (949) 632-2169. Sinc Iy, Tom Ep son, PE Vice President TETRA TECH