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 • Architectural Renderings • Project Schedule • Questions 2
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 3
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 4
California’s Path Cr-6 Levels to Regulate Cr6 1968 Widespread Natural Occurrence 2008 April 15, 2014 Court Order Cr6 MCL is set at 0.010 mg/L V. V. ( 10 ppb) 5
Cr6 Occurrence in CVWD Wells • 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 6
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) 7
Selection of Ion Exchange Treatment • Proven effective treatment method • Flexibility in accommodating future water quality regulations • Efficient residuals management • Cost effective 8
Weak-Base Anion Exchange (WBA) Treated Raw Water Water Bag filters Aeration or Resin Caustic vessels Carbon dioxide for pH reduction Operations • Bag filter replacement • Carbon dioxide refills • Resin replacement 9
Strong-Base Anion Exchange (SBA) Resin Raw Vessels Water Bag Filters Treated Water Operations • Regeneration • Residuals treatment OFF-SITE and disposal REGENERATION WASTE BRINE WASTE TANKS BRINE Waste Brine TANKS Brine Tanks Tanks TREATMENT OF SPENT BRINE AND DISPOSAL OF BRINE AND SOLIDS 10
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 11
La Quinta WBA Facilities 12
WBA Site Selection Criteria 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 13
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 ordinance (LQMC Section 9.100.210) • Facility will not produce odors • Golf course perimeter will be landscaped 14
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Architectural Rendering – Airport Blvd 17
Existing Conditions at Tee box 18
Architectural Rendering – Tee box 19
Existing View from Backyards 20
Architectural Rendering – View from Backyards November 2015 21
Architectural Rendering – View from Backyards April 2016 22
IMPLEMENTATION TIMELINE 2012 2013 2014 2015 2016 2017 2018 2019 Compliance Plan Financing Design Environmental Review Construction 23
Chromium-6 Water Treatment Project Schedule La Quinta Facility 24
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 25
COMMENTS AND QUESTIONS? Please visit www.cvwd.org/cr6 for additional information 26
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