Wastewater Treatment Systems Projects

Overview

Wastewater Treatment
Service Overview

West Yost’s expertise covers every type of wastewater facility and process, from collection and treatment systems through disposal and reclamation facilities. We provide a full service approach across the entire spectrum of disciplines including technical studies; system 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 permitting through construction bring intrinsic value to our projects and our clients. We bring knowledge gained from the permitting and regulatory process into the planning and design of facilities that meet our clients performance goals, and apply our construction knowledge to the design process to reduce cost and risk during construction.

Our wastewater expertise includes the following:

Wastewater Treatment

  • Treatment Plant Facilities Planning
  • Treatment Plant Facilities/Process Design
  • Recycled Water Facilities Planning and Design
  • Permitting and Regulatory Compliance
  • Condition Assessment and Improvement Prioritization
  • Asset Management
  • Hydraulic/Process Modeling
  • Funding Strategies
  • Infrastructure Rehabilitation
  • Program Management
  • Construction Management
Overview

Wastewater Treatment Systems

Project

Wastewater Treatment Plant Expansion and Tertiary Upgrade
City of Woodland, California

West Yost assisted the City of Woodland in expanding their Wastewater Treatment Plant (WWTP) capacity from 7.8 mgd to 10.4 mgd, while also providing new tertiary treatment facilities (oxidation, coagulation, and filtration and ultraviolet (UV) disinfection of the effluent.) The project consists of an expansion of the secondary process to achieve ammonia removal to concentrations less than 2 mg/L, new tertiary facilities, and 100-year flood protection for the main portion of the treatment facility.

Project

Facility Study/Preliminary Design and WWTP Improvement Design
City of Galt, California

West Yost assisted the City of Galt (City) in identifying and analyzing alternatives for achieving compliance with NPDES permit requirements. West Yost prepared a Permit Compliance Action Plan that recommended alternatives. The City used this information to proceed with near-term treatment facility improvements that will also position the City to be responsive to future growth needs, as well as additional changes in regulatory requirements. The addition of filtration and ultraviolet (UV) disinfection was identified as an important first step towards achieving compliance with the City’s discharge permit. West Yost worked with the City to pilot test filters and provided the preliminary design of these new treatment processes.

Project

Regional Wastewater Treatment Plant Planning and Design
City of Atwater, California

West Yost provided planning and design for the City of Atwater’s new Regional Wastewater Treatment Plant (WWTP). The new plant was required to increase average flow capacity to 6 mgd (expandable to 12 mgd ultimate) and comply with new regulatory requirements for advanced treatment. West Yost evaluated upgrades to existing treatment plant facilities as well as alternatives involving abandoning the existing plant and constructing new facilities on a City owned site five miles from town.

Project

Wastewater Treatment Plant Expansion
City of Corning, California

West Yost provided planning, design engineering and full-time onsite construction management services for the expansion of the City’s wastewater treatment plant (WWTP).

Project

Construction Management for Design/Build of Wastewater Treatment Plant
Mountain House Community Services District, California

Mountain House’s Wastewater Treatment Plant (WWTP) was built in three phases and completed by means of a design-build project delivery method. West Yost provided full-time, onsite construction management (CM) services for all three phases of the project, which consisted of a new and subsequently expanded WWTP, civil/site work, roadways, utilities, and appurtenant facilities.

Project

Construction Management for Water Treatment Plant and Subsequent Expansion
Mountain House Community Services District, California

West Yost provided construction management (CM) and inspection services for the new water treatment plant and subsequent expansion of the plant to 15 mgd. West Yost’s construction management included successfully addressing continuous operations during construction, shut downs and tie-ins, site safety and security, and complex electrical system integration.

Project

Easterly Wastewater Treatment Plant Tertiary Treatment Improvements
City of Vacaville, California

West Yost completed facility master planning and design to address changing regulatory requirements for the City’s Easterly Wastewater Treatment Plant. This project includes $130 million of improvements required to meet new regulatory requirements and to abandon the old North Plant and replace it with capacity in the New South Plant.

Project

Regional Wastewater Treatment Plant Planning and Design
City of Atwater, California

West Yost provided planning and design for the City of Atwater’s new Regional Wastewater Treatment Plant (WWTP). The new plant was required to increase average flow capacity to 6 mgd (expandable to 12 mgd ultimate) and comply with new regulatory requirements for advanced treatment. West Yost evaluated upgrades to existing treatment plant facilities as well as alternatives involving abandoning the existing plant and constructing new facilities on a City owned site five miles from town.

Project

Wastewater Treatment Plant Expansion and Tertiary Upgrade
City of Woodland, California

West Yost assisted the City of Woodland in expanding their Wastewater Treatment Plant (WWTP) capacity from 7.8 mgd to 10.4 mgd, while also providing new tertiary treatment facilities (oxidation, coagulation, and filtration and ultraviolet (UV) disinfection of the effluent.) The project consists of an expansion of the secondary process to achieve ammonia removal to concentrations less than 2 mg/L, new tertiary facilities, and 100-year flood protection for the main portion of the treatment facility.

Project

Easterly Wastewater Treatment Plant Tertiary Treatment Improvements
City of Vacaville, California

West Yost completed facility master planning and design to address changing regulatory requirements for the City’s Easterly Wastewater Treatment Plant. This project includes $130 million of improvements required to meet new regulatory requirements and to abandon the old North Plant and replace it with capacity in the New South Plant.

Project

Facility Study/Preliminary Design and WWTP Improvement Design
City of Galt, California

West Yost assisted the City of Galt (City) in identifying and analyzing alternatives for achieving compliance with NPDES permit requirements. West Yost prepared a Permit Compliance Action Plan that recommended alternatives. The City used this information to proceed with near-term treatment facility improvements that will also position the City to be responsive to future growth needs, as well as additional changes in regulatory requirements. The addition of filtration and ultraviolet (UV) disinfection was identified as an important first step towards achieving compliance with the City’s discharge permit. West Yost worked with the City to pilot test filters and provided the preliminary design of these new treatment processes.

Project

White Slough Water Pollution Control Facility Expansion/Upgrade
City of Lodi, California

West Yost has been providing wastewater treatment and disposal system planning, regulatory compliance services and engineering design for the City of Lodi White Slough Water Pollution Control Facility (WPCF) since the late 1990’s. West Yost completed design of the City’s $60 million improvement project at the WPCF, incuding tertiary filtration and UV disinfection facilities, expansion of the treatment capacity from approximately 6.5 mgd to 8.5 mgd, and the addition of process improvements to provide full ammonia conversion and partial denitrification. 

Project

Advanced Treatment Capabilities Study
Central Valley Clean Water Association, California

West Yost was commissioned by the Central Valley Clean Water Association (CVCWA), to evaluate whether various wastewater treatment processes can achieve stringent water quality-based permit limits being applied to municipal dischargers in the Central Valley of California.

Project

Easterly Wastewater Treatment Plant NPDES Permitting
City of Vacaville, California

The NPDES permit assistance performed by West Yost for the City of Vacaville included preparation of a Report of Waste Discharge and NPDES permit application, and subsequent negotiations with the Regional Board regarding the NPDES permit requirements. The NPDES permit adopted was the first permit in the State to incorporate the requirements of the Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California, 2005 (SIP).

Project

Flag City WWTP Facilities Planning and NPDES Permit Assistance
San Joaquin County, California

West Yost provided a facility assessment for the original design of the 0.16 mgd, Flag City Wastewater Treatment Plant (WWTP). This work included an evaluation of the disposal capacity of the onsite storage pond, and an evaluation of several long-term disposal and reuse options. Through this study, it was determined that continued land disposal in the short-term was not feasible. Therefore, this study culminated in the development of an NPDES permit application and Report of Waste Discharge to allow for surface water discharge. West Yost provided support services throughout the permit renewal process, including negotiations with Regional Water Quality Control Board staff, and data analysis.

Project

Recycled Water System Hydraulic Model
City of Roseville, California

West Yost utilized the hydraulic model to optimize use of recycled water and provided the City flexibility in the operation of the system for future demands. The resulting work allows operational decisions to be made to reduce wastewater discharges.

Project

Water Supply Master Plan and Recycled Water Program Cost Analysis
City of Sacramento, California

West Yost led the City and associated stakeholders through an evaluation and cost analysis of a potential recycled water program for the City. This evaluation provided the City with information to make an informed decision on whether to proceed with the Recycled Water Program.

Project

Recycled Water Feasibility Study/Urban Reuse
California Water Services Company, Chico District, CA

West Yost worked with Cal Water’s Chico District to develop a recommendation on what role recycled water could play in Cal Water’s future water supply, identify the ultimate size of Cal Water’s Urban Reuse Project, and develop a phased approach to project implementation.

Commands