12b Attachment

• Board Meeting Date: 7/20/2010
• Description: Water Supply Planning Section - Water Supply Reserve Account Project Change - Fraer River Settling Pond
• Board Meetings - Doc Type: Memo

Colorado Water Conservation Board
Comments on Agenda Item 12b, July 20 -21 Board Meeting
July 16, 2010 — Page 3
solids (TDS) relative to the source water. Disposal of this concentrate is becoming
increasingly problematic. The goals of this project were to provide a comprehensive
review and evaluation of the full range of potential beneficial and nontraditional uses
of concentrate and to assess the feasibility of implementation, economic
considerations, and environmental safety.
o Title: 03- CTS- 17cCO, Impacts of Membrane Process Residuals on Wastewater
Treatment
Description
An essential guidance manual for any utility that handles membrane process
residuals. The report and accompanying CD -ROM provide utilities with two types of
models for predicting the impacts of membrane concentrate loadings on the
collection system and the wastewater treatment plant. Interactive Microsoft® Excel
models allow users to predict point source impacts of the discharge of concentrates
from a variety of sources, such as reverse osmosis and the mass balance model
examines the impacts of system -wide concentrate discharges.
o Title: 03- CTS- 17dCO, Investigation of Regional Solutions for Disposing of
Concentrate
Description
Provides an overview of concentrate disposal and management practices and
includes a decision methodology that can be used to assess not only what
concentrate disposal options are technically feasible but also what options are
viable. The decision methodology is provided in the form of interactive software
included on a CD -ROM that allows users to enter site - specific data and assess
options.
I believe WERF brings the experience and expertise necessary for Colorado to finally proceed
with this important project. I want to thank my fellow Board members for their patience as the
project proponents sorted through the contracting issues, and I urge your support for staff's
recommendation to approve the change in contracting entity.
Yours t
Barbara J. Biggs
Member — CWCB
City & County of Denver
cc: Claudio H. Ternieden, WERF
Dave Akers, CDPHE -WQCD
Phil Brandhuber, HDR Engineering, Inc.
Linda Bassi, CWC6