Item 19 - Agreements for On-Call Engineering Services

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PROPOSAL POR On -Call Engineering Design Services Douglas Seaman Electrical, I&C PFAS Treatment Systems Education BS, Electrical Engineering, California State University, As a Control Systems Engineer, Doug's responsibilities include the Long Beach, 2012 design and specification of instrumentation systems that monitor, Years of Experience control, and record the various stages of crude oil as it progresses through the refining process. More recently, he has stepped into the 10 role of control system programming and configuration which involves the Honeywell Distributed Control System and its link with various Programmable Logic Controllers, EXPERIENCE PFAS On -Call Contract, Orange County Water District, CA. 2021. Electrical Engineer for IXIGAC treatment for PFOS and PFOA design for 18 affected wells in the main Orange County Basin. Projects included design, estimating of capital and operating costs, coordinating with vessel suppliers, and construction management for the following projects: ■ Serrano Water District Well #5 and #9 (In Operation): This project consists of a 3,000 GPM IX System with a bag filter pre-treatment, 3,000 GPM Booster Pump Station and new chemical feed system for disinfection. ■ Kimberley Well 1A (In Operation)* Located on a very small site with a single well this facility is designed to produce 3,000 GPM using an IX System with a bag filter pre-treatment and new chemical feed system for disinfection, ■ Fullerton Main Plant (Completed Design): The Fullerton Main Plant will treat six onsite wells with a total capacity of 10,100 GPM. PFOS, PFOA and VOCs will be removed using 6 to 12 ft diameter, 40,000 lb. GAC vessels that will discharge into an existing forebay then pumped into the distribution system. The remaining wells will be treated with an IX system consisting of 8 vessels and bag filters for pre-treatment, ■ Yorba Linda Water District Headquarters Plant (In Operation): This system will treat water from 10 wells with a total capacity of 17,400 GPM. An IX System consisting of 11 pairs of Lead/Lag Vessels (22 vessels total), bag filter pre-treatment, Booster Pump Station, and new Onsite Generation System for chlorine disinfection. In order to get the system on the existing site an extensive analysis of the site improvements was completed. Pure Water Oceanside Advanced Water Purification Facility, City of Oceanside, Oceanside, CA. 2018 — Ongoing. Instrument and Control Systems Engineer. To counteract the growing reliance on imported water supply while increasing local water supplies, and to meet the City's long-term goal of 50 % water independence by 2030, the City of Oceanside has selected a team led by Tetra Tech to design a new Advanced Water Purification Facility (AWPF). The newly proposed AWPF will provide highly treated water supply with the specific purpose to recharge the Mission Groundwater Basin in the upper San Luis Rey recycled water service area through indirect potable reuse as a component of an overall project titled Pure Water Oceanside. The AWPF will be built on an existing former recycled water storage pond at the San Luis Rey Water Reclamation Facility. The AWPF process will be designed as a multi -barrier treatment process including microfiltration, reverse osmosis, and ultraviolet advanced oxidation process. In addition to these three main unit treatment processes, the AWPF will include chemical storage and feed equipment for conditioning, stabilizing and membrane cleaning. Influent flow storage, flow diversion, and associated pumping will also be included in the facilities design. Well No. 32 Rehabilitation, City of Santa Ana, CA. 2017 - Present. Electrical Engineer. The project involved the preparation of a Preliminary Design Report and plans/specifications for the rehabilitation of the well facility. The underground well would be scraped, cleaned and modified to be within an above ground CMU block control building (housing mechanical and electrical rooms). The design also included a separate an -site generation sodium hypochlorite building, 3,500 feet of 12-inch discharge pipe to John Garthe Reservoir and modification at the reservoir to connect to the on -site piping. TETRA TECH