Document Text Content
TOWN OF PALM BEACH
Information for the Water Committee Meeting on January 29, 2009
To:
Via:
Water Committee:
David A. Rosow, Chair
Denis P. Coleman, Member
Peter B. Elwell, Town Manager
From: Sarah E. Hannah, Assistant Town Manager
Re:
Information Regarding Water Supply
Date: January 23, 2009
The following documents are attached for your review in preparation for the Water Committee
meeting on January 29 at 3 p.m.:
1. Agenda
2. PowerPoint presentation from the City of West Palm Beach regarding the four options for
the Town’s water supply and relationship with the City.
3. Cost estimates and other information regarding private wells.
4. Follow-up on prior water committee information requests:
a. Information from the City regarding per capita usage in Palm Beach.
b. Information from the City regarding a comparison of the City’s water quality with
New York City’s water quality
c. Statistical analysis of the top 100 water consumers on the island.
d. Average daily effluent flow for the cities that use the East Central Regional Water
Reclamation Facility (ECRWR).
e. Executive summary of the results from the Town’s testing of the City’s potable
water (the rest of the report is available in the Town Manager’s Office).
cc:
Mayor and Town Council
Eduardo Balbis, P.E., City of West Palm Beach
Jane Struder, Finance Director
H. Paul Brazil, Director of Public Works
John Page, Director of Planning, Zoning, and Building
James Bowser, Town Engineer
TOWN OF PALM BEACH
Town Manager’s Office
WATER COMMITTEE MEETING
AGENDA
TENTATIVE-
SUBJECT TO
REVISION
JANUARY 29, 2009
3:00 P.M.
WELCOME!
The progress of this meeting may be monitored by visiting the Town’s web site
(www.townofpalmbeach.com) and selecting “Live Agenda” or “Council Audio”. If you
have questions relative to these two features, please contact the Office of Information
Systems (561) 227-6315.
I. CALL TO ORDER AND ROLL CALL
II.
III.
IV.
PLEDGE OF ALLEGIANCE
APPROVAL OF AGENDA
PRESENTATION BY CITY OF WEST PALM BEACH OF FOUR (4) WATER
SUPPLY OPTIONS
V. DISCUSSION OF INDIVIDUAL PRIVATE WELLS FOR IRRIGATION
VI.
VII.
VIII.
FOLLOW-UP ON PRIOR WATER COMMITTEE INFORMATION REQUESTS
ANY OTHER MATTERS
ADJOURNMENT
Note:
Disabled persons who need an accommodation in order to participate in the Town Council Meeting are
requested to contact the Town Manager’s Office at 838-5410 or through the Florida Relay Service by dialing
1-800-955-8770 for voice callers or 1-800-955-8771 for TDD callers, at least two (2) working days before this meeting.
Post Office Box 2029 * 360 South County Road * Palm Beach, Florida 33480
Telephone (561) 838-5410 * Facsimile (561) 838-5411 * townmanager@townofpalmbeach.com
1/29//09, Water Committee Meeting
TOWN OF PALM BEACH
WATER COMMITTEE
Discussion of Future Plant Options
January 2009
PRESENTATION AGENDA
� Competing Regulations
� Desalination Water Plant
� Floridan Water Plant
� Town Remains As Equal Customer
� Town Becomes Bulk Customer
� Next Steps
COMPETING REGULATIONS
DRAFT YEAR ROUND IRRIGATION RULE
� Latest draft SFWMD language dated October 31, 2008.
� Public Hearing Scheduled for January 15 th .
Unless the Town uses reclaimed water for irrigation it may be subject to the
Year Round Irrigation Rule – even if Floridan or Seawater is used.
SUPPLY SOURCES
SURFACE WATER
SOURCES
GROUNDWATER
SOURCES
�
�
�
�
Clear Lake
Existing
Infrastructure
Variable
Quality
Watering
Restrictions
Permitted
�
�
�
�
�
�
�
Surficial Aquifer
100 – 150 feet deep
Consistent WQ
Watering Restrictions
Saline Intrusion
Limited Allocation
Availability Unknown
30 – 50 Sites Needed
Atlantic Ocean
Floridan Aquifer
� Unlimited
Supply
� 1,000-1,200 1 ft deep
� Complex
� Consistent WQ
Treatment
� Long-Term Degradation
� Consistent WQ
� secure
Greenhouse
Gases
reliable
� Highest Cost
�
�
�
�
Very Costly
No Watering Restrictions
Limited Allocation
12 – 20 Sites Needed
sustainable
DESALINATION PLANT OPTION
City Dedicates Seawater Plant for Town
� Town remains a customer of the City of West Palm
Beach
� Additional capital and operational costs to Town of
Palm Beach
� Desalination plant located on City property
secure
reliable
sustainable
WHY LOOK TO THE OCEAN?
� Sustainable drought-proof source of
water
� Concern for availability of fresh
surface water and groundwater
resources = regulatory pressure
� Decreasing costs due to technology
improvements
� Comparable costs to indirect potable
water reuse projects
TAMPA BAY DESALINATION FACILITY
� 25 mgd plant
� Co-located with
power plant
� 8.5-acres for WTP
� Provides 10% water
demand for region
� Screening, filtration,
RO membranes,
chemical systems
� AWS funding
provided
DESALINATION PROCESS FLOW DIAGRAM
Source
Pre-Treatment
Membranes
Post-Treatment
Residuals
ean Raw Water
re & Pump
Station
Atlantic Oce
ke Structu
A
Intak
Fine Screens
Coagulation &
Flocculation
Clarification
Microfiltration
Ultraviolet Light
and 2 nd RO
Passes
1 st a
Calcite
Contactor
Storage Tank
High Service
Pump Station
Chlorine
Caustic Soda
Fluoride
Carbon Dioxide
Calcium Carbonate
Corrosion Inhibitor
Backwash
Equalization
Gravity Sludge
Thickening
Dewatering
Landfill
Cartridge Filters
Cleaning
System
Chlorine
Coagulant
Flocculant Aid
Bisulfite
Deep Injection
Well
PRE-TREATMENT IS KEY TO SUCCESS
� Protect the Membranes
� Screens remove shells,
creatures, wood and debris
greater than ¼ inch
� Heavier solids settled out via
flocculation and clarification
� Smaller solids filtered via
microfiltration membranes
� Ultraviolet light controls biological
activity and fouling
� Control scale formation by
adjusting pH and using
antiscalants
Fine screens
Clarification Basin
UV units
SPECIALIZED MEMBRANES FOR TREATMENT
� RO membranes allow water
particles (dissolved ions) to pass
through tiny screens, while
blocking salts
� Highly specialized technology
� Large amounts of power required
to “push” water through the
membranes via pressure
� Pre-treatment important to
protect costly membranes
SOLIDS HANDLING REQUIRED
Desalination produces “waste” streams that require
materials to be disposed via landfill.
� Debris removed by screens
(shells, wood, etc) must be
landfilled
� Clarification process &
microfiltration backwash solids
are thickened, dewatered, and
sent to the landfill for disposal
Transportation of solids increase facility operations cost
and result with a larger carbon footprint.
t
DESALINATION PLANT LAYOUT
DESALINATION PLANT ISSUES
� 25 mgd facility required to produce 10 mgd potable water.
� Approximately 10 acres required ed for infrastructure.
� Complex treatment processes.
� Brine by-product waste disposal via deep injection well
(ocean outfalls no longer permitted for WTPs).
� Dewatered sludge must be disposed at landfill.
� Highly energy intensive to operate.
� N t il t f d d t
� Not necessarily exempt from proposed year-round water
restrictions drafted by SFWMD
DESALINATION PLANT COSTS
Cost Estimate for 10 mgd Desalination Plant
Site Work $ 3,000,000
Raw Water Intake, Pumping, Piping, and Fine Screens $ 12,000,000
Coagulation, Flocculation, Clarification $ 3,900,000
,
Pretreatment Transfer Pumping $ 700,000
Microfiltration $ 22,000,000
Ultraviolet Light $ 4,100,000
Chemical Treatment $ 1,600,000
Reverse Osmosis Membrane System $
48,600,000
000
Post Treatment Chemical Systems $ 2,300,000
Ground Storage Tanks $ 3,900,000
High Service Pumping $ 2,100,000
Residuals Handling $
10,300,000
000
Administration & Laboratory Building $ 1,900,000
Brine Disposal Injection Well $ 6,000,000
Dedicated Water Transmission Piping $ 6,000,000
Conceptual Cost $
128,400,000
General Requirements (2%) $ 2,568,000
Construction Mark-up (3%) $ 3,852,000
Mobilization (2%) $ 2,568,000
Contingency (10%) $ 12,840,000
Engineering and Other Non-Construction Costs (8%) $ 10,272,000
TOTAL CONCEPTUAL COST $ 160,500,000
Assumes plant on City property & no additional cost for land.
FLORIDAN AQUIFER WATER PLANT OPTION
City Dedicates Floridan Plant for Town of Palm Beach
� Town remains a customer of the City of West Palm
Beach
� Additional capital and operational costs to Town of
Palm Beach
� Low Pressure Reverse Osmosis plant located on City
property
secure
reliable
sustainable
WHY LOOK TO THE FLORIDAN AQUIFER?
� Reliable and drought-proof source
located approximately 1,200 feet
below ground surface
� Relatively stable water quality
seasonally, but geographically
variable
� Reduces demands on water for the
Everglades
� Significantly less energy intensive
than desalination processes
� Landfill transportation and disposal
costs not applicable
LOCAL UTILITIES ARE USING FLORIDAN AQUIFER
� Palm Beach County
� Jupiter
� Deerfield Beach
� Broward County
� Highland Beach
� Fort Myers
� Palm Coast
� Marion County
� St. John’s County
� Hollywood
� Miramar
� Florida Keys
Palm Beach County’s 10 mgd Lake Region WTP
LOW PRESSURE RO PROCESS FLOW DIAGRAM
Source
Pre-Treatment
Membranes
Post-Treatment
Distribution
Wells
Cartridge
Filters
Feed
Pumps
LPRO
Membranes
Degassification
Transfer
Clearwell
Storage &
High
Service
Sulfuric Acid
Scale Inhibitor
Cleaning
System
Chlorine
Caustic Soda
Fluoride
Corrosion Inhibitor
Deep Injection
Well
TREATMENT PROCESSES
� SOURCE
SOURCE - wells can be located near the plant. No
existing users to cause interference (today).
� PRE-TREATMENT
TREATMENT- disposable 5 micron cartridge
filters, pH adjustment, & scale inhibitor.
� MEMBRANES
MEMBRANES – Low Pressure Reverse Osmosis
elements require less power to push water thru screens.
� POST-TREATMENT
TREATMENT – hydrogen sulfide removal with
odor control, disinfection, pH adjustment, blending.
� DISTRIBUTION – connect to existing water main
network without subaqueous crossings.
FLORIDAN PLANT LAYOUT
LOCATION
The Floridan Aquifer wells are not restricted with respect
to specific location in that no other production wells exists
today near the City’s WTP.
FLORIDAN AQUIFER PLANT ISSUES
� Floridan Aquifers can be used for both Aquifer Storage
and Recovery and source water
� Potential increased energy costs associated with lifting i
water and impacts to adjacent users
� Potential for decline in water quality over time
~Some pumping wells become saltier (up-coning of
more saline water from below or laterally along coast)
~ Membrane design and periodic replacement
~Blending with Surficial Aquifer water
� Estimated 125% of raw water to meet treated water
demands
� Concentrate disposal via deep injection well
FLORIDAN AQUIFER PLANT COSTS
Cost Estimate for 10 mgd Floridan Plant
Site Work & Site Electrical $ 3,000,000
Raw Water Wells & Piping $ 13,500,000
Pretreatment t t System $
5,000,000
Membrane Building w/LPRO system $ 19,000,000
Chemical Feed Systems $ 2,000,000
Yard Piping $ 1,500,000
Clearwell ll $
1,200,000
000
Transfer Pump Station $ 1,000,000
High Service Pump Station $ 2,100,000
Ground Storage Tanks $ 3,900,000
Brine Disposal Injection Well $
6,000,000
Dedicated Water Transmission Piping $ 6,000,000
Conceptual Cost $ 64,200,000
General Requirements (2%) $ 1,284,000
Construction Mark-up (3%) $ 1,926,000
Mobilization (2%) $ 1,284,000
Contingency (10%) $ 6,420,000
Engineering and Other Non-Construction Costs (8%) $ 5,136,000
TOTAL CONCEPTUAL COST $ 80,250,000
Assumes no additional cost for land.
TOWN REMAINS AS EQUAL CUSTOMER
� Town subject to same water restrictions imposed on
water supply for the entire service area
A portion of the City’s water supply IS
supplemented with reclaimed water
� Town subject to same rates and debt service as other
customers.
� Town’s demand met with City’s plant
Pilot testing membrane treatment of surface water now
secure
reliable
sustainable
TOWN BECOMES A BULK CUSTOMER
� Town sets its own rate structure
� New Bulk Service Interlocal
Agreement Required
FINANCE
� Town to become a retail utility
service provider
� Study on-going by City’s rate
consultant regarding options for
setting a bulk user rate
CUSTOMER
SERVICE
OPERATIONS
The City evaluated finished water demand data for all
Town of Palm Beach customers.
SUMMARY
Option Capital Costs Retail Costs
Bulk Costs
Desalination Plant $160,500,000 000 TBD(+) N/A
Dedicated Floridan Plant $80,250,000 TBD(+) N/A
Bulk Customer N/A N/A(+) TBD
Remain as Equal
N/A Current Rates N/A
secure
reliable
sustainable
NEXT STEPS
� SFWMD Rulemaking Outcome
� Determine City’s Future Water System
– Long-Term
Improvements
� Develop Bulk Rates
secure
reliable
sustainable
QUESTIONS?
City of West Palm Beach, Florida
Estimate of Gallon per Capita Per Day for the Town of Palm Beach
Fiscal Year 2009
Line Single Family SRF and MF Total Town of
No. Residential Residential Palm Beach (2)
1 Total Water Sales (ccf) (1) 1,226,662 2,205,898 2,961,994
2 Total Single Family Units 2,206 2,206 2,206
3 Total Multi-family Units 0 6,807 6,807
4 Total Residential Units Recognized 2,206 9,013 9,013
5 Water Use per Month per Residential Unit (ccf) 46.34 20.4 27.39
6 Water Use per Month per Residential Unit (gallons) 34,662 15,259 20,488
7 Average Daily Flow per Residential Unit 1,139 502 674
8 Assumed Household Size (3) 1.81 1.81 1.81
9 Household Per Capita Per Day Flow Estimate 629 277 372
Footnotes:
(1) Water sales forecast based on the Water, Wastewater, and Stormwater Rate and Charge Study
prepared by PRMG dated March 24, 2008.
(2) Includes all water sales, including irrigation and commercial use.
(3) Household size derived from demographic information published on the Nationmaster.com website