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 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.
