Permitting / Regulatory

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

Water Recycling Project
City of St. Helena, California

West Yost is assisting the City in the development of the best compliance solution for several outstanding regulatory issues associated with their 0.5 mgd Wastewater Treatment Facility (WWTF), including an evaluation of the City’s water reuse options.

Project

Regulatory Permitting Assistance, including NPDES and WDR
City of Atwater, California

West Yost was first retained by the City of Atwater (City) to assist with the development of a formal comment submittal to the Regional Water Quality Control Board in response to the Tentative Waste Discharge Requirements (WDRs) for the City’s 6.0 mgd Wastewater Treatment Plant (WWTP). West Yost raised several technical issues identified in the Tentative WDRs, many of which were resolved through discussions with Regional Board staff. The permitting team’s remaining concerns caused the Regional Board to withdraw the Tentative Permit from consideration to give the City and the Regional Board an opportunity to further evaluate some of the outstanding technical issues.

Project

Wastewater Treatment Facility Upgrade
City of St. Helena, California

West Yost is assisting the City of St. Helena in the development of the best compliance solution for several outstanding regulatory issues associated with their 0.5 mgd Wastewater Treatment Facility (WWTF). One of the major drivers of the proposed project is the need for expansion of the currently available disposal operations, which include surface water discharge to the Napa River from December through April, and land application on property located adjacent to the treatment facility. This project has capitalized on West Yost’s understanding of and experience with wastewater permitting, and includes ongoing interaction with the San Francisco Bay Regional Water Quality Control Board.

Project

Wastewater Treatment Permitting Assistance and Reclamation/Reuse Alternatives Study
City of Lodi, California

West Yost has been providing wastewater treatment and disposal system planning and regulatory compliance services for the City’s White Slough Water Pollution Control Facility (WPCF) since the late 1990s. This work has included several planning and regulatory studies related to the current and future requirements for surface water discharge, biosolids land application, and recycled water use on agricultural properties surrounding the WPCF and an adjacent power plant.

Project

Wastewater Reliability Evaluation and Prioritized Facilities Improvement Plan
Mt. View Sanitary District, California

West Yost recently performed a facility reliability, condition assessment, regulatory compliance evaluation, and recommendations plan for Mt. View Sanitary District’s Wastewater Treatment Plant (WWTP).

Project

Biological Oxygen Demand (BOD) Organic Loading Study
City of Lodi, California

West Yost completed a BOD Organic Loading Study to evaluate the site-specific cycle average BOD loading limit that is appropriate for the City’s land application site to prevent 1) odorous anaerobic conditions, 2) incomplete removal of organics in the soil profile, 3) mobilization of iron, manganese, and other compounds, and 4) increases in bicarbonate in the soil solution via carbon dioxide conditions.

Commands