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.

West Yost provided design services and services during construction for improvements at the City’s WWTP. Key improvements included a filter influent pumping station, a cloth-disk effluent filtration system, a UV disinfection system, a new effluent outfall pipeline, and biosolids process options/alternatives evaluation and improvements. Design also included a new operations and electrical building provides over 2,700 square feet of work area, including new offices, a plant operations control room, men’s and women’s restroom and shower facilities, chemical storage and dosing equipment, and electrical equipment for the new plant upgrades.
West Yost designed the tertiary treatment and biosolids dewatering improvements so that these facilities may be expanded relatively easily. The following provisions were made to allow for easy expansion:

  • Space was provided to add two additional filter influent pumps, thereby doubling the capacity of the pump station. Additional capacity may be obtained by replacing pumps.
  • Space and piping connections were provided to add as many as four additional filters, thereby tripling the filtration capacity.
  • Space and knock-out walls were provided to add as many as four additional UV channels, thereby tripling the disinfection capacity.
  • Space was provided to expand the operations and electrical building to include a laboratory.

Industry Awards

American Public Works Association (APWA), Sacramento Chapter
2010 Project of Year Award (Small Agency, Environmental Project Category)

California Water Environment Association (CWEA), Sacramento Area Section
2010 Engineering Achievement Award – Wastewater Treatment Plant