| 1 CITY OF CLEARWATER

Clearwater’s Groundwater Replenishment Project

100 S. Myrtle Ave. | Clearwater, FL 33756

myclearwater.com/groundwater

Agency on Bay Management June 14, 2018

Presenter: David W. Porter, P.E. Public Utilities Director City of Clearwater

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INTEGRATED WATER

MANAGEMENT STRATEGY

• Conserve water supplies

• Preserve water sources

• Protect coastal environment

• Produce more water locally

• Manage the cost of water

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PROJECT BACKGROUND HISTORY

• Mayor tours GW replenishment plant in Orange County, CA - 2008

• Preliminary feasibility study - 2009

• Feasibility study and public outreach - 2011

• Pilot sampling protocol approval – FDEP - 2012

• Design and construct pilot plant - 2012 through 2013

• Operate one-year pilot and public outreach summary report - June 2013 through June

2014

• Preliminary design – Advanced water purification plant, recharge wells and disposal

well – 2014 through 2016

• Preliminary design report - June 2016

CURRENT WORK

• Final design and FDEP permitting – Advanced water purification plant, recharge wells

and disposal well

• Public outreach program continues

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PROJECT STATEMENT

To construct a water purification plant at

the existing Northeast Water Reclamation

Facility to supply three million gallons a

day of highly-purified water to recharge

lower Zone A of the Floridan aquifer to

allow the City to reliably supply all the

potable water demanded by our citizens

at a reasonable cost.

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CITY WATER FACILITIES

Gulf of

Mexico Tampa Bay

City Supply Wells

Water Treatment Plants

Water Reclamation Facilities

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AQUIFER

RECHARGE

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EXPECTED MIGRATION OF WATER 10 Years from Injection

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PURIFICATION

TREATMENT

SYSTEM

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FULL ADVANCED TREATMENT WITH

POST-TREATMENT FOR GROUNDWATER RECHARGE

Reverse

Osmosis

Membrane

Contactors

Scale Inhibitor

H2SO4

RO Concentrate

to Deep Injection

Well

H2O2

N2

Vacuum

CO2 NaHS Ca(OH)2

Purified Water to

Recharge Well

Ultrafiltration UV

Advanced

Oxidation

Backwash to WRF

Headworks

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POST-TREATMENT STEPS

MEMBRANE CONTACTOR

CHEMICAL ADDITION

STEP 1

REMOVES

Dissolved

Oxygen

ADDS

Carbon Dioxide

Calcium

Alkalinity

Water

Purification

Process

Purified Water

To Recharge

Wells

• Adjust pH

• Adjust LSI

Mitigate potential for

mobilization of

naturally occurring

arsenic in aquifer

CHEMICAL ADDITION

STEP 2

ADDS

Sodium Bisulfide

(Reducing agent)

• Reduces ORP

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RECHARGE WELLS

Recharge Lower Zone A Floridan Aquifer

Upper Zone A

Lower Zone A

Zone B

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100% DESIGN RENDERINGS

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PILOT AND

DEMONSTRATION

ACTIVITIES

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CLEARWATER PILOT TESTING PROCESS

• Full purification and post

treatment process

demonstrated at pilot

scale

• Duration - 12 months

(FDEP, Chapter 62-610)

• 25,000+ tests

200+ constituents

• Consistently produced

purified water that met or

surpassed all drinking

water quality standards

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TESTING AND MODELING to Understand Injected Water Movement

Rock Core Testing | Aquifer Recharge Testing | Hydrogeochemical Modeling

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PUBLIC

OUTREACH

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PUBLIC OUTREACH PROGRAM

• Multi-year formal program

• Customer surveys

• City Council and elected

officials

• Environmental Advisory

Board

• Utility customer

communications

• Homeowners association

meetings

• Community groups and

service clubs

• Professional society

meetings and conferences

• Pilot plant tours

| 20 CITY OF CLEARWATER

PUBLIC INFORMATION OPEN HOUSE EVENTS

Three Events Held in 2016/2017

• Nov. 15, 2016, Countryside Library

• Feb. 28, 2017, Main Library

• May 2, 2017, East Library

One Event Held in 2018

Hosted by FDEP

• June 13, 2018, Main Library

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COMMUNICATION TOOLS AND METHODS

• Letter to all city residents within 1-mile radius of project site

• Postcard with open house dates to all single-family homeowners in

the city and all city residents within 1-mile radius of project site

• Project website, MyClearwater.com/groundwater

• Videos / Virtual tour (on website & C-VIEW TV)

• News releases

• MyClearwater Magazine

• Sunshine Lines utility bill stuffer

• E-Newsletter blasts / List Serv distribution

• Speaking circuit / Presentations

• City manager e-newsletter to city staff

• Online calendar of events

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PUBLICITY

2018 • MyClearwater Magazine (May-September 2018)

• Water Online (April 13, 2018)

• Tampa Bay Times and Miami Herald (April 6, 2018)

• Clearwater Beach Neighborhood Newsletter

(February 2018)

• MyClearwater Magazine (Jan.-April 2018)

2017 • Tampa Bay Times (Jan. 16, June 2, Oct. 6, Nov. 9, 2016,

Feb. 16, 2017)

• MyClearwater Magazine (Jan.-April 2017)

• Clearwater Patch (Feb. 24, 2017)

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PUBLICITY

2016 • Tampa Bay Reporter (Nov. 13, 2016)

• Florida Specifier (March 8, 2016)

• Florida Water Resources Journal (February 2016)

2015 • 83 Degrees News (July 28)

• Bay Soundings (February)

• Florida Water Resources Journal (February)

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PROJECT

COSTS

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PROJECT COSTS AND TIMELINE

Cooperatively Funded – City of Clearwater and SWFWMD

• City Portion – $18.125M

• SWFWMD Portion – $18.125M

Timeline

• Initial discussions with SWFWMD – 2009

• Initial grant of funds ($225K) to complete feasibility study – 2010

• Grant to design, construct and operate pilot plant ($1.5) – 2011

• Grant to complete final design, construction, public outreach and start-

up ($16.4) – 2016

| 26 CITY OF CLEARWATER

Clearwater’s Groundwater Replenishment Project

100 S. Myrtle Ave. | Clearwater, FL 33756

myclearwater.com/groundwater

Agency on Bay Management June 14, 2018

QUESTIONS OR COMMENTS?