Water and Wastewater Treatment
From permitting and planning to start-up, West Yost’s water and wastewater treatment experts will take the guesswork out of your complex projects
We provide a full-service approach across the entire spectrum of water and wastewater treatment disciplines, including technical studies, modeling, regulatory and permitting assistance, advanced treatment plant design, funding assistance, and construction management. Our firm’s unique ability and experience working with clients from planning and permitting through construction bring intrinsic value to our projects and our clients.
Facility Types
- Wastewater and Recycled Water
- Nutrient Removal
- Biosolids
- Biogas Management and Energy/Heat Production
- Organic Waste and Co-Digestion
- Surface Water and Groundwater
- Solids and Waste Stream Management
- Facilities and Site Improvements
Permitting/Regulatory Compliance
- Permit Adoption and Compliance Support
- Water Quality Studies
- Antidegradation Studies
- Groundwater Monitoring
- Biosolids Land Application Management
- Title 22 Reports
- Pretreatment Program Assistance
- Regional Water Quality Control Board and State Department of Public Health Services Coordination
Planning
- Treatment Facility Master Plans
- Facilities Planning, Alternatives Analysis, and Feasibility Studies
- Process Modeling/Optimization
- Energy Management Plans
- Condition Assessments
- Prioritized CIP Development
- Plant Hydraulic Modeling
- Pilot Testing
Design
- New Facilities, Expansions, and Upgrades
- Repair, Rehabilitation, and Optimization Improvements
- Bid Phase and Construction Support Services
Operations Support
- Process Optimization and Trouble Shooting
- Operations Plans, Operations & Maintenance Manuals, and Standard Operating Procedures
- Tracer Studies
- Operations Training
- Facility Start-Up Assistance
- Data Management
Climate-Energy-Reliability (CER)
Process-based energy solutions for reliability, resilience, and economy
West Yost’s Climate-Energy-Reliability (CER) service develops and delivers process-based energy solutions for our water sector clients. Our team is highly experienced in deploying solutions that combine emerging technologies with science-based engineering principles to reduce energy demands, improve mechanical system performance, and enhance the resilience of your water system.
Our core goal is to reduce our clients’ dependency on non-renewable resources through a transition to reliable and renewable resources.
To achieve exceptional results for our clients, we focus on the key mission-critical functions of reliability, resilience, and economy–through the energy lens.
Project Highlights
Multi-Year Treatment Facilities Planning and Design
City of Davis, CA
For nearly 30 years, West Yost has acted as the City of Davis’s trusted advisor for its treatment planning, design, and construction needs. West Yost has completed the planning and design for a major expansion to the Water Pollution Control Plant (WPCP). In support of the City, we have continued to provide additional services with alternative analysis and providing solutions on challenging problems.
White Slough Water Pollution Control Facility Multi-Year Planning and Regulatory Compliance Support
City of Lodi, CA
West Yost has been providing wastewater treatment and disposal system planning, regulatory compliance, and engineering design services for the City of Lodi’s White Slough Water Pollution Control Facility (WPCF) since the late 1990s. This project work started with a role in the development of a flexible Wastewater Master Plan to identify the improvements needed to address Lodi’s capacity and rehabilitation needs over a 25-year planning horizon. The Plan was completed in December 2000.
Wastewater Treatment Plant Improvements
City of Jackson, CA
West Yost designed improvements to most of the City of Jackson’s wastewater treatment plant to address new regulatory requirements and aging infrastructure. Improvements included conversion of existing oxidation ditches to simultaneous nitrification-denitrification with improved aeration control and instrumentation, construction of a new disc filter facility, conversion from chlorine disinfection to UV disinfection using inclined lamp configuration, changing from belt press dewatering to screw press dewatering, construction of a new electrical building and MCC capacity, up-sizing electrical service to the facility, and installation of a new standby generator.
Wastewater Treatment and Biosolids Facilities Master Plan
Dublin San Ramon Services District, CA
West Yost completed a comprehensive Wastewater Treatment and Biosolids Facilities Master Plan for Dublin San Ramon Services District that evaluated every aspect of the District’s wastewater treatment system and included a detailed capital improvement program to address key capacity and condition-related issues through 2035.
Row River Water Treatment Plant Expansion
City of Cottage Grove, OR
West Yost performed design services, bid support services, and construction support services to the City of Cottage Grove for the Row River Water Treatment Plant Expansion project. The project’s objective was to expand the water treatment plant’s capacity from 4 mgd to 6 mgd.
Easterly Wastewater Treatment Plant Expansion
City of Vacaville, CA
West Yost performed planning and design services for two major projects at the City of Vacaville’s Easterly Wastewater Treatment Plant (EWWTP), a $100 million Expansion/Upgrade Project and a $130 million Advanced Treatment Project. West Yost recently designed an acetic acid storage and feed system at Vacaville’s wastewater treatment plant. West Yost is also currently completing engineering services for the design of odor control systems at the Vaca Valley Lift Station and Easterly Wastewater Treatment Plant.
Team Spotlight
Timothy Banyai, PE
Treatment Business Sector Leader
Timothy Banyai, PE
Treatment Business Sector Leader
“Projects that touch many parts of the treatment plant are exciting to manage because they involve different aspects of the liquid and solids treatment processes. I enjoy working closely with clients to find the best solutions to problems that need both local knowledge and technical expertise.
I am proud of a project we did for the City of Davis to analyze alternatives to prevent struvite buildup in their centrate piping. The project was exciting because it involved using modeling tools to complete the analysis and ultimately recommending a technology that was not yet widely used for this purpose. We used BioWIN modeling (a biological modeling software) and Visual Minteq Version 3.1, an EPA chemical equilibrium model to help determine the potential for struvite formation. The innovative solution we recommended was the Hydropath technology to induce an oscillating sine wave that keeps the struvite crystals in suspension so do not form hard scales on surfaces. After several months of operation, the City is having good success with it!”
Kathryn Gies, PE, ENV SP
Regulatory and Planning Practice Area Leader, Engineering Manager II
Kathryn Gies, PE, ENV SP
Regulatory and Planning Practice Area Leader, Engineering Manager II
“As a facilities planner, I help guide our clients through process of evaluating treatment alternatives and selecting the solutions that provide the most sustainable approach for their community. Helping communities select and implement effective solutions for achieving environmental protection and water reuse is so rewarding.
What I’m most proud of are the long term relationships I have with clients. I have been working with a large percentage of the clients that I work with today since I started at West Yost over 20 years ago. These long-term relationships not only make me feel like a valuable member of their team, but I also feel like a real member of their community.”
Preston Van Meter, PE
Principal Engineer II
Preston Van Meter, PE
Principal Engineer II
“I am very passionate about wastewater! My family is convinced I have landed in the perfect career for me. It is perhaps a dirty job that not everyone wants, but it is my happy place. I am further energized by the people I get to work with every day. The interactions with the operators who run the facilities I design and my teams that have to turn the ideas rolling around in my brain into reality drive me and make me jump out of bed each and every day.
I have become an expert in membrane bioreactors (MBRs) that are a highly automated and I love designing their complex treatment process. I also enjoy assembling teams that I call “strike teams” to tackle challenging problems in the field in a very quick turnaround time. The pace, organization, and teamwork required to solve a challenging problem quickly is energizing. The project team for the Sandy, Oregon Wastewater Treatment Plant Project is using this process. I am proud of the way our team from the City, West Yost, and other project partners have pulled together to deliver on behalf of the ratepayers.”
