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WATERMASTEWATER EXPERIENCE The following summarizes the experience of the members of our project team: Pipeline Projects During the last 15 years, members of our project team have been involved in the design and/or construction support of more than 300 miles of water and recycled water pipelines. Tetra Tech deems pipeline projects to be just as important as facility projects because comprehensive research and design can mitigate field issues. We believe we have a very proficient team that executes these projects efficiently and successfully. Sewer Relining or Rehabilitation Projects For more than 15 years, members of our project team have been involved in the design and/or construction support services of more than 100,000 feet of relining or rehabilitation of existing sewer mains. Tetra Tech has extensive understanding of the temporary handling of the sewage flow during the work as well as the importance of detailing the bypass facilities within the construction plans and specifications. Pump Station/Well Projects Within the last 15 years, our team has been involved in the design and/or construction support of more than 40 water/recycled water pump stations and 15 water wells. We have developed a team, including a hydrogeological engineer, that works efficiently and effectively together to provide our clients with the maximum capacity required. Lift Station Projects For more than 15 years, members of our project team have been involved in the design and/or construction support services of more than 8 lift stations. Flow Control Facility Projects During the last 15 years, members of our project team have been involved in the design and/or construction support of more than 12 flow control facilities. Reservoir Projects Within the last 15 years, our team has been involved in the design and/or construction support of more than 60 water/recycled water reservoirs (steel and concrete). The reservoir design projects utilize a combination of our in-house structural and electrical teams along with a geotechnical firm to present the best design improvement to the client. Water Quality and Disinfection Projects During the last 15 years, our project team has completed design of over 11 treatment (process/membrane) facilities within Southern California, including design of disinfection facilities at over 10 well and/or reservoir facilities. With new PFAS regulation becoming increasingly required within the State of California, our engineers have become proficient in the design of the latest treatment options available completing over 14 local design projects of PFOS, PFOA, TCE, TOC and Perchlorate. Structural Seismic Retrofits Our in-house structural group has been responsible for the structural analysis and design of water projects completed by Tetra Tech. This work has also included numerous seismic retrofits throughout Southern California. The seismic analysis includes a three-dimensional finite element analysis, member stress analysis, and foundation stability assessment. Electrical and Controls Our in-house electrical group has also supported the projects done within the Irvine office, including utility, industrial, residential, commercial, governmental, and military projects. Our teams work efficiently together to provide our clients with the most comprehensive design. Planning/Engineering Studies For more than 15 years, members of our Project Team have completed over 15 master plans and/or hydraulic modeling, engineering studies within Southern California. TETRA TECH Page 13