 Groundwater Supply ◦ Quantity ◦ Quality  Infrastructure ◦ Treatment ◦ Transmission ◦ Distribution  Response Plans ◦ Long-term ◦ Short-term ◦ Emergencies

 Master Plan Developed In 2006 ◦ Population/Flow Projections showed Increased Demands ◦ Major Capital Components  New RO WTP and Well field  New Booster Pump Stations  New Distribution PS/Storage  Continued R/R

Decreased demand projections:  Reduced need for added booster pump stations ◦ Property, structures, equipment and electric Changed economic conditions:  Delays construction of distribution pump stations and storage tanks

Wellfield and Aquifers - Biscayne meets all standards -Nitrate only parameter with up trend - Floridan meets standards, other than chlorides. RO system removes chlorides. Supply Protection Land management of wellfield Monitoring of ground and surface waters Action plans based on monitoring data and/or events

Transmission Main Assessment Vulnerability Assessment to determine ◦ Areas where leaks and corrosive soils occur ◦ Difficult access for repair ◦ Older sections for replacement

Pipeline Protection Cathodic Protection against corrosive environment  Steel pipe section along transmission main  Steel water storage tanks

Water Supply and Treatment Multiple Wells Multiple Treatment Units Emergency Power Generation Electric and Diesel Pumps

Water Supply and Treatment 2 MGD Emergency Seawater Desalination Stock Island(Diesel) 1 MGD Emergency Seawater Desalination Marathon (Diesel)

Transmission Pipeline Pumping Capability Four Booster Pump Stations Electric and Diesel Pumps Emergency Power Generation

Emergency Backpumping Three pumps on Stock Island Diesel/Electric Three pumps in Marathon Diesel/Electric 23 of 36 Million Gallons Storage Capacity For Backpump Operations

What Happens?

Land Based Pipe Failure

Reports To Manger of Operations: Exact Locations of Failure Needed Equipment, Supplies, and Personnel Estimates Amount of Time Required for Back Pumping and to Complete Repair Traffic Impacts

Determines: Amount of Water Stored in Affected Area Amount of Time Back Pumping Operation Possible Necessity of RO Plant(s) Operational Changes to Overall System

Occurred 11 Times In Past 5 Years In All Cases Stored Water Supply Was Sufficient Reverse Osmosis Plants Were Not Operated Confident Similar Emergency Repairs Will Have Same Success Of Timely Completion

Key Largo to Florida City Pipe Failure

Build Access Pad to Leak Site Utilizing Available Contractors Implement Water Excavation Stock Materials Needed for Repair Effect Repair Similar to Land Based

Never Been Done Availability Of Contractors Assume Up TO 4 Days To Complete Seawater ROs Only Water Supply

Mandatory Water Restrictions Needed Water Demands May Not Be Met For Days Intermittent Or Complete Shut Down Of Some Distribution Systems/Possible Container Filling Identify Possibility Of Expedited Repair Develop Emergency Plan With Monroe County

Bridge Failure

Dependent on DOT Contractor to Replace Pipe as Bridge is Replaced/Repaired Maintain Pipe Inventory for Repair Depend on RO Production for Supply

PIPE SIZEDUCTILE IRONSTEEL 36”194’40’ 30”212’769’ 24”446’516’ 18”36’61’

Repairs May Require Months To Complete Water Demands Likely Exceed Supply Barge/Ship Mounted RO Possible (Navy) Consider Long Term Pipeline Redundancy Plan Additional RO Capacity