Facilities Project PGA WEST Town Hall Meeting Coachella Valley - - PowerPoint PPT Presentation

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Facilities Project PGA WEST Town Hall Meeting Coachella Valley - - PowerPoint PPT Presentation

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Chromium-6 Water Treatment Facilities Project PGA WEST Town Hall Meeting Coachella Valley Water District April 12, 2016 Agenda Introductions Objectives Chromium 6 (Cr6) Project Overview WBA Treatment Facility Components

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Chromium-6 Water Treatment Facilities Project

PGA WEST Town Hall Meeting Coachella Valley Water District

April 12, 2016

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Agenda

  • Introductions
  • Objectives
  • Chromium 6 (Cr6) Project Overview
  • WBA Treatment Facility Components
  • Architectural Renderings
  • Project Schedule
  • Questions

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Objectives

  • The project will benefit the Coachella Valley by treating

groundwater to meet the new State of California mandated chromium-6 drinking water regulation that became effective July 1, 2014

  • Provide information and establish a dialogue with PGA

WEST

  • Solicit community input on the building architecture and

landscaping

  • Coordinate construction activities to meet the State of

California mandated compliance schedule

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Public Outreach

  • See www.cvwd.org/cr6 for information on

legislation, background, and related documents

  • Desert Sun articles
  • Notice of Preparation July 10 to August 8, 2015
  • Meeting with City of La Quinta January 2016
  • Meetings with PGA WEST beginning in late

January 2016

  • Future meetings

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California’s Path to Regulate Cr6

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V. V.

Widespread Natural Occurrence

April 15, 2014 Court Order Cr6 MCL is set at 0.010 mg/L (10 ppb) Cr-6 Levels 1968 2008

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  • Cr6 MCL of 10 parts

per billion (ppb) effective July 1, 2014

  • Existing well levels

from <1 to 21 ppb

  • 31 wells expected

to have Cr6 levels above 10 ppb

  • 25 wells expected

to have Cr6 levels between 8-10 ppb

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Cr6 Occurrence in CVWD Wells

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Source of Supply Study

  • Evaluation of treatment and non-treatment

alternatives

  • Assessment of treatment technologies

– Weak-base Anion Exchange (WBA) – Strong-Base Anion Exchange (SBA) – Reduction-Coagulation-Filtration (RCF) – Reverse Osmosis (RO)

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Selection of Ion Exchange Treatment

  • Proven effective treatment method
  • Flexibility in accommodating future water

quality regulations

  • Efficient residuals management
  • Cost effective

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Weak-Base Anion Exchange (WBA)

Carbon dioxide for pH reduction Bag filters Resin vessels Aeration or Caustic Treated Water Raw Water

Operations

  • Bag filter replacement
  • Carbon dioxide refills
  • Resin replacement

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WASTE BRINE TANKS WASTE BRINE TANKS

Strong-Base Anion Exchange (SBA)

Operations

  • Regeneration
  • Residuals treatment

and disposal

Brine Tanks

TREATMENT OF SPENT BRINE AND DISPOSAL OF BRINE AND SOLIDS

Waste Brine Tanks

OFF-SITE REGENERATION

Raw Water Bag Filters Resin Vessels Treated Water 10

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Compliance Schedule

  • Federal drinking water standards receive

five-year compliance period

  • Compliance schedule approved by State:

Finish Date Complete CEQA Certification/Design Substantially Complete Jun 30, 2016 Start Construction Jul 31, 2016 Complete Construction - ID8 Dec 31, 2018 Complete Construction - Cove Jun 30, 2019 Begin Operations Oct 31, 2019

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La Quinta WBA Facilities

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WBA Site Selection Criteria

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Location selected to balance environmental, social, & economic concerns:

  • Size of property
  • Property is owned by CVWD
  • Water quality of nearby wells
  • Existing pipeline infrastructure
  • Distance from nearby homes
  • Ability to screen exterior of facility
  • Meet state-mandated compliance

period

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Design Features

  • Site architecture has been designed to

match the surrounding area

  • Facilities meet City zoning requirements

for building height

  • Facility will comply with City noise
  • rdinance (LQMC Section 9.100.210)
  • Facility will not produce odors
  • Golf course perimeter will be landscaped

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Architectural Rendering – Airport Blvd

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Existing Conditions at Tee box

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Architectural Rendering – Tee box

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Existing View from Backyards

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Architectural Rendering –View from Backyards November 2015

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Architectural Rendering –View from Backyards April 2016

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IMPLEMENTATION TIMELINE

Compliance Plan Financing Design Construction 2012 2013 2014 2015 2016 2017 2018 2019 Environmental Review

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Chromium-6 Water Treatment Project Schedule

La Quinta Facility

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Summary

  • CVWD must comply with the new State of

California chromium-6 drinking water regulation by the earliest feasible date

  • Provide ongoing information and outreach
  • Solicit community input on the building

architecture, color, and roof tile

  • Coordinate construction activities with

PGA WEST

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COMMENTS AND QUESTIONS? Please visit www.cvwd.org/cr6 for additional information

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