Water and Wastewater Treatment
Ensuring safe and reliable water is available in your community
Experience
From permitting and planning through design to start-up, our water and wastewater treatment experts will take the guesswork out of your complex projects. Our treatment engineers and water quality experts have done master planning and designs for greenfield and upgrades/expansions of existing water and wastewater treatment plants with capacities between 2 and 160 mgd.
West Yost Value
West Yost sees the bigger bigger. We focus on your needs and goals, employing innovative practices to design enduring water and wastewater solutions. We ensure quality and regulatory compliance from the start, delivering the highest value projects. Our team develops quality designs for our clients and the communities they serve.
Innovative
We conquer difficult engineering and construction challenges with inventiveness. When planning and designing a project we are looking at the entire life-cycle and appying inventivness and creativity, determing what is best for the client in the short-term and future. Our team knows how to navigate complex regulatory requirements by staying up to date to implement the best permitting strategies, technologies, and treatment processes.
Our Treatment Business Sector team provides services across the entire spectrum of water and wastewater treatment disciplines and works closely with the other business sectors to develop planning and design documents.
The Wastewater Treatment Practice Area team develops comprehensive and effective designs for wastewater and recycled water treatment plants. Areas of expertise include screening and grit removal; primary treatment; biological secondary treatment, including activated sludge, biological nutrient removal and secondary clarification and disinfection.
The Water Treatment Practice Area team design documents for the construction of surface water and groundwater treatment plants, including raw water intakes, screenings, pre-sedimentation and flocculation, media and membrane filtration, reverse osmosis and other advanced treatment technologies, disinfection, and water sludge management and washwater recovery.
Water and Wastewater Treatment Scope of Services
Facilities Planning, Alternatives Analysis, and Feasibility Studies • Process Modeling/Optimization • Energy Management Plans
Condition Assessments • Prioritized CIP Development • Plant Hydraulic Modeling • Pilot Testing
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 Division of Drinking Water Coordination • Treatment Facility Master Plans
New Facilities, Expansions, and Upgrades • Repair, Rehabilitation, and Optimization Improvements
Bid Phase and Construction Support Services • Process Optimization and Trouble Shooting
Operations Plans, Operations & Maintenance Manuals, and Standard Operating Procedures
Tracer Studies • Operations Training • Facility Start-Up Assistance • Data Management
Sector Services Highlight
Planning and Permitting
Our team develops process models and hydraulic capacity assessments, master plans, facility plans, optimization studies, condition assessments, funding applications, and preliminary design reports. We work closely with clients to review water and wastewater permits and negotiate permit requirements with state regulatory agencies.
Wastewater Treatment
Develops comprehensive and effective designs for wastewater and recycled water treatment plants. Areas of expertise include screening and grit removal; primary treatment; biological secondary treatment, including activated sludge, biological nutrient removal and secondary clarification and disinfection.
Water Treatment
Design documents for the construction of surface water and groundwater treatment plants, including raw water intakes, screenings, pre-sedimentation and flocculation, media and membrane filtration, reverse osmosis and other advanced treatment technologies, disinfection, and water sludge management and washwater recovery.
Membrane Systems
Through the use of treatment membrane systems our team can ensure the purity of water supplies. These filters remove impurities, microorganisms, and contaminants, producing clean water. This technology is beneficial to clients as it ensures reliable access to safe and high-quality water, promoting public health and sustainability.
Treatment Team Spotlight
Nate Cullen, PE
Treatment Business Sector Leader
Kathryn Gies, PE
Engineering Manager II
Charles Hardy, PE, QSP/QSD
Principal Engineer I
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.
Additional Projects
EchoWater Project – Nitrifying Sidestream Treatment
Sacramento Regional County Sanitation District
This project involved the construction of a triple-train sequential batch reactor (SBR) process to pretreat highly concentrated wastewater returned to the main treatment plant by nitrifying the wastewater stream using high speed turbo air blowers. Each basin independently treated the wastewater by blowing air through fine bubble diffusers which nitrifies the wastewater making it easier for the main BNR process to reduce ammonia content in the secondary effluent.
Lower Northwest Interceptor’s New Natomas and South River Pump Stations
Sacramento County Regional Sanitation District
West Yost provided construction management services for this project which featured construction of two separate wastewater pump stations as part of the $600 million Lower Northwest Interceptor program. The pump stations included dual wet and dry well pump stations, CMU Switchgear Buildings, CMU Emergency Standby Power Buildings, buried Junction Structures, Odor Control Facilities, and Chemical Feed Systems.
