West Yost has been providing recycled water treatment and land application 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 studies related to recycled water use on agricultural properties surrounding the WPCF on other agricultural and municipal sites near the WWTP and at adjacent power plants. West Yost’s efforts culminated in the design and construction of a Title 22 tertiary filtration and UV disinfection facilities.
West Yost is working with the City to maximize recycled water as a long-term resource by preparing a multi-faceted water master plan update for the City. In addition to evaluating the City’s water system for its capacity to meet existing demands and future growth, the water supply evaluation included: an assessment of potential sources of recycled water; identification of potential landscape and indoor recycled water users; estimation of recycled water demands; development of preliminary pipeline routes; and development of a capital and operations and maintenance cost estimate.
West Yost is currently completing a Recycled Water System Plan for the Water Agency’s Sonoma Valley County Sanitation District that includes a comprehensive evaluation of the existing system, review of existing and future system operations, development of a hydraulic model, projecting future wastewater and recycled water flows, reviewing existing customer usage and service preferences, and analysis of a future recycled water distribution system to deliver recycled water to potential future customers.
West Yost has been providing the City with recycled water regulatory assistance since the beginning of its recycled water program in 2004. This has included preparing the City’s Title 22 Engineering Report, customer guidelines, and other necessary regulatory documents, and facilitating discussions with the San Francisco Bay Regional Board and the State Division of Drinking Water (DDW) to permit the City’s project under Regional Board General Order 96-011.
The City is nearing completion of a significant improvement project for its Water Pollution Control Plant that will eliminate treatment components (i.e. ponds) that have historically lost significant volumes of water through evaporation and percolation. Once the improvements are complete, water losses will be eliminated, and additional effluent flows will become available. The City was interested in short and long-term strategies for wastewater reuse opportunities of these additional flows, as well as options that would eliminate the City’s surface water discharge completely.
West Yost is preparing a multi-faceted water master plan update for the City. In addition to evaluating the City’s water system for its capacity to meet existing demands and future growth, the water supply evaluation included: an assessment of potential sources of recycled water; identification of potential landscape and indoor recycled water users; estimation of recycled water demands; development of preliminary pipeline routes; and development of a capital and operations and maintenance cost estimate.
West Yost wrote the “Bay Area Recycled Water Commercial Truck Fill Guide” for BACWA. West Yost surveyed Bay Area recycled water agencies regarding their existing or planned commercial truck fill programs and compiled program information into a succinct reference guide for agencies and truck fill users. The guide includes information on truck fill locations, permit requirements for use, and costs.
West Yost is preparing a study considering the feasibility of three alternative water supplies to serve four large irrigation customers located in Oakland Hills for EBMUD. The study assesses the viability of using either recycled water, raw water from EBMUD’s Lake Chabot, or diverted water from the Livermore-Amador Valley Water Management Agency pipeline to provide a non-potable water supply to the four Oakland Hills customers. The study addresses required water treatment, regulatory requirements, conceptual distribution pipe alignments, and conceptual estimated costs.
West Yost was contracted by Google in 2014 to assess the feasibility of various alternative water supplies on Google-owned properties. West Yost has provided consulting services assessing potential recycled water applications, supply, water quality, and related issues for various Google facilities. West Yost also prepared a graywater system conceptual design memo for a Google-owned facility. West Yost continues to provide Google with professional engineering consulting services for recycled water and alternative water supply issues.
West Yost has been providing professional engineering consulting services to Stanford University since 2010. West Yost has acted in an advisory role to Stanford in the consideration of recycled water use on campus. West Yost prepared a recycled water white paper for Stanford that discusses potential recycled water uses on campus, recycled water regulations, permitting issues, and water quality.
West Yost has been providing recycled water engineering consulting services to the City for more than a decade which include program management, funding support, and regulatory support. West Yost is serving as program manager for implementation of Phase 1 of the City’s Recycled Water Project, and provided funding support to the City to obtain nearly $5 million in grant funding commitments from state and federal funding sources for the Phase I project.
West Yost worked with the Dublin San Ramon Services District (DSRSD) in master planning both its water and recycled water systems, and in the design of water and recycled water facilities. This work included the completion of a comprehensive Water Master Plan update integrating aggressive water conservation and reclaimed water elements. Through water conservation and the identification of reclaimed water use opportunities, the projected future potable water demands were significantly reduced, and therefore infrastructure sizing was also reduced, saving money.
