HomeMy WebLinkAbout2005 11 14 Regular 501
COMMISSION AGENDA
ITEM 501
CONSENT
INFORMATIONAL
PUBLIC HEARING
REGULAR X
L
November 14,2005
Meeting
+- MGR
Authorization
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REQUEST: Utility Department Presenting the Reclaimed Water Augmentation Study
PURPOSE: The purpose of this Board item is to present the reclaimed water augmentation study
which establishes a City wide plan for an alternative water supply to replace the usage
of potable water for irrigation purposes.
CONSIDERATIONS:
This report is needed to provide the necessary supporting data required for the
Consumptive Use Permit application submittal to the water management district for
withdrawing water from Lake Jesup to augment the reclaimed water system. The City
Commission has previously directed staff to pursue the feasibility of utilizing Lake Jesup as
an alternative water supply.
This alternative source is needed to reduce the potable water usage by City residents.
The largest usage is for irrigation which averages an estimated 30% of our groundwater
withdrawals and can peak at 50% to 60 % on a daily basis during May and June. The City's
potable water Consumptive Use Permit (CUP) from the S1. Johns River Water Management
District expires in October 2006 and it is anticipated that the new permit will allow for
moderate growth the first five years and then a drastic cut back to the withdrawal limits of
the first year for the remaining five years of the permit. This is based on recent permits issued
locally. As can be seen in the included graph, we have not exceeded the 2000 withdrawal
limit of 1.575 billion gallons since normal rainfalls have returned but growth projections have
us at or near the 2000 levels by 2006/2007.
November 14,2005
Regular Agenda Item 501
Page 2
Annual Potable Water Use
I!!::::] Total Water Pumped (Million Gallons)
C=:J CUP Permitted Capacity (Million Gallons)
-*- Annual Rain FaD Inches
.2 2000.0 80
ta 1800.0 - 70
0 ~
<: <:
~ 1600.0 - . 60 '(;j
cG
~ 1400.0 - 50 ~
.5 .c:
u
~ 1200.0 - 40 ..=
0
u::
1000.0 . 30
1997 1998 1999 2000 2001 2002 2003 2004
Year
The City Commission has previously approved reuse master plans for the West system in
1994 and the East system in 1998. The residential expansion of the reclaimed water system was
stopped in 2002 when it became apparent that we had reached our limit to be able to meet the peak
demands of April and May. The initial phases ofthis plan represent a continuation of the schedule
laid out in the previous master plans.
The withdrawal of surface waters from Lake Jesup in excess of lOOK gallons per day requires
a separate CUP in addition to the potable water CUP. The park usage is already bumping up against
that threshold. For perspective purposes, a withdrawal of 4 million gallons of water from Lake Jesup
would lower the level 0.0147 inches ignoring inflowfrom the various drainage basins. As part of
the permit process, we will likely be required to evaluate impact ofthese withdrawals based on
minimum flow levels. Our initial meetings with SJRWMD were positively received and the
possibility of utilizing an artesian well in Parkstone was highly encouraged.
As outlined in the report, usage of Lake Jesup surface waters will require filtration and
disinfection prior to being pumped into the reclaimed water system. While the specific treatment
requirements have not defined, the potential site plan in the report shows how the proposed
expansion fits into that portion of the Wincey property acquired by the Utility.
November 14,2005
Regular Agenda Item 501
Page 3
The sequence of events contemplated after the completion of this master plan is:
1. Submit report with Lake Jesup CUP application.
2. If CUP issued, perform pilot study to determine treatment requirements
3. Update construction costs estimates
4. IdentifY funding sources (SRF loans, debt, reclaimed rates, etc.)
5. Proceed with plant design and permitting
6. Proceed with reclaimed water distnbution design.
FUNDING:
The funding required and sources available will be identified when the project is permitted
and pilot studies deem the project feasible. The initial phases of the project have been submitted for
inclusion in the SJRWMD Water Supply for potential partial funding.
RECOMMENDATION:
It is recommended that the City Commission approve and adopt the reclaimed water
augmentation study for CUP permitting of the surface water withdrawal from Lake Jesup to
augment the reclaimed water system.
IMPLEMENTATION SCHEDULE:
The CUP for reclaimed augmentation will be submitted by January 1, 2006.
ATTACHMENTS:
1. Reclaimed Water Augmentation Study by CPH Engineers
COMMISSION ACTION:
CITY OF WINTER SPRINGS
RECLAIMED WATER AUGMENTATION STUDY
Prepared By:
CPH Engineers Inc.
1117 East Robinson Street
Orlando, Florida 32801
CPH Project No W04111
September 20, 2005
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. ES-1
Executive Summary
Finding alternate sources of water has become a priority for the region because of
increased demand for potable water created by continued growth of the area. We are also
seeing growth occur from redevelopment at higher densities in the Winter Springs area. In
the past Winter Springs was known as a bedroom community. Now it is a vibrant City of its
own with a developing Town Center and higher density multistory structures being
constructed in and around the Town Center. The City of Winter Springs has many attributes
which makes the community a pleasant place to live. To maintain continuous growth, we
need to develop alternate sources of water supply. We believe that a natural resource
exists in Lake Jesup and that this source can be used for irrigation and free up the
groundwater source for potable uses only. Such a plan requires the expansion of the
secondary water delivery system and also requires a water source. Irrigation water does
not have to be potable and therefore the level of treatment can be reduced. The City
already has an extensive reclaimed distribution system and this system can be expanded to
meet the future needs of the City of Winter Springs.
The project is divided into two phases for the treatment works and seven phases for the
distribution system. The project spans the next fifteen years with equally sized distribution
projects every two years.
-,. . Table ES-1._AlcIQmentat,ion Phase -... . .~, -.. ....-.
Year Ending Irrigation Lake Jesup Treatment Probable Opinion of
September 30 Phase Phase Construction Cost
2007 A $2,646,420
2008 1 $2,047,500
2009
2010 2 $2,000,000
2011
2012 3 $2,057,500
2013 B $1,610,400
2014 4 $2,042,500
2015
2016 5 $2,057,500
2017
2018 6 $1,892,500
2019
2020 7 $1,245,000
Total Project $17,599,320
This report reveals that the project is feasible. There are many more steps required to
make the project a reality. The following items need to be pursued:
1) Discussion with SJRWMD on the project and coordination with liThe Friends
of Lake Jesup". Preliminary discussions have been made with SJRWMD.
City of Winter Sorincs - Reclaimed Water Auamentation Study
Pace No. ES-2
2) Proceed with an application of a Consumptive Use Permit (CUP). This
process has been started.
3) Upon approval of the CUP, proceed with pilot testing of the recommended
treatment options.
4) Proceed with a design with known data from pilot testing.
5) Proceed with design(s) to expand the reclaimed distribution system.
City of Winter SDrinos - Reclaimed Water Auomentation Study
Paoe No. 1-1
SECTION 1
INTRODUCTION
1.0 Introduction
The City of Winter Springs owns and operates two water reclamation facilities, the
East WRF and the West WRF. The facilities currently supply reclaimed water
meeting public access criteria to two local golf courses, residential irrigation and
public areas (such as parks and roadway medians) for irrigation. The City has
expanded its reclaimed water system over the years to maximize the operation of
the system due to seasonal variation in usage. Seasonally, the City has too much or
too little reclaimed water for its customers because of the large variation in usage
between the wet and dry seasons.
The City is proposing to supplement, or augment, the reclaimed water system to be
able to supply irrigation quality water to all of its residents as an alternate to potable
water with the capability to serve all users, even during the dry season. Therefore,
during the reduced demands of the wet season, all of the reclaimed water from the
wastewater plants will be beneficially used for irrigation instead of having to use the
percolation ponds or dedicated spray sites. This would further benefit the City and
the environment by reducing the potable water demands by reducing groundwater
withdrawals.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 2-1
SECTION 2
EXISTING CONDITIONS
2.0 Existing Conditions
2.1 Wastewater Treatment
The City currently owns and operates two water reclamation facilities, (WRF). Each
facility can treat its effluent to public access reclaimed water standards as defined
by Florida Department of Environmental Protection. The WRF's have a combined
treatment capacity of approximately 4.08 MGD.
2.1.1. East WRF
The East WRF has a distribution pump station that is fed by a three million gallon
reclaimed water ground storage tank. The pumping system consists of four (4)
pumps; one jockey pump at 500-gpm, two (2) pumps at 1 ,200-gpm each, and one
pump at 1 ,800-gpm. The total pumping capacity is 2,400-gpm (3.456 MGD) with the
largest pump and the jockey pump out of service. The treatment plant has a
permitted capacity of 2.012 MGD and the reclaimed water distribution pump station
exceeds the 150% pumping criteria of FDEP regulations.
2.1.2. West WRF
The West WRF has a distribution pump station that is fed by a two million gallon
reclaimed water ground storage tank. The pumping system consists of five (5)
pumps; one jockey pump at 180 gpm, two (2) pumps at 950-gpm each, and two (2)
pumps at 600 gpm. The total pumping capacity is 2650 gpm (3.816 MGD) with one
of the 600 gpm pumps and the jockey pump out of service. The treatment plant has
a permitted capacity of 2.07 MGD and the reclaimed water distribution pump station
exceeds the 150% pumping criteria of FDEP regulations.
2.2 Distribution System
The existing distribution system is basically split into two areas: the East System and
the West System. The two systems are each served by their respective reclaimed
water facilities and are interconnected at the northwest end of Oak Forest. While the
system is interconnected and water freely flows between the systems, in order to
simplify the description of the two systems, they will be referred to as the East and
West systems. Please note that the permitted capacity of the disposal sites exceeds
the permitted treatment capacity of each of the Water Reclamation Facilities.
The East System currently delivers reclaimed water from the East WRF to the areas
described in Table 2-1 and shown on Figure 2-1.
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Dale: ~2005
Job No.: W04111
CIlY OF WINTER SPRINGS
RECLAIMED WATER AUGMENTATION STUDY
C~Ir,t~
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 2-3
Table 2':1. Easter.n lRecfaim.~~~Wafer::,S~st9m:~",
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'"'<<" ._- ~ ~____.....:~_.R. .__ ._~. --- -... -". ._-. '- ~"""'-"'"'.''' ......-......."..,....-
SITE Permitted Capacity Average Demand (MGD)
(MGD)
Tuscawilla Golf Course *Not specified 0.157
Oak Forest Spray Site 0.201 0.20
Percolation Ponds 0.610 0.246
Trotwood Park *Not specified 0.000
ResidentiallrriQation *Not specified 0.587
*AII public access areas permitted for 1.720.
The Tuscawilla Golf Course is connected by a 16-inch pipe directly from the WRF.
This pipe reduces to a 10-inch and runs west through the golf course to Winter
Springs Blvd. At this point, the pipe feeds Tusca Oaks and Arrowhead, as well as
the Winter Springs Blvd. median irrigation system. The 10-inch trunk line crosses
Winter Springs Blvd and enters the Power Easement. The pipeline follows the
Power Easement to the Oak Forest spray site and the point of interconnection with
the West System.
The East WRF also sends flow through an 8-inch main that runs along Winter
Springs Blvd east to Northern Way. This pipe runs a short way up Northern Way to
where it crosses over to Seneca Blvd. At this location the main feeds the percolation
ponds and the residential irrigation along Seneca. The 8-inch main travels along
Seneca to Vistawilla Drive where it feeds the Howell Creek Reserve, Creeks Run,
and Eagle's Watch subdivisions.
The West System currently delivers reclaimed water from the West WRF to the
areas described in Table 2-2 and shown on Figure 2-1.
Table 2-~.Westem. ReC!~im;~~';Water.}'S~~t~
SITE
Permitted Capacity
CMGD)
0.350
0.136
0.200
0.530
0.110
Not Re-permitted
0.100
0.795
Average Demand (MGD)
Winter SprinQs Golf Club
Central Winds Park
Site 16 Spray Site
Dayron Ponds
Mt Greenwood Ponds
Power Easement
Site 17 Ponds
ResidentiallrriQation
0.086
0.044
0.043
0.292
0.014
0.000
0.001
0.591
City of Winter SDrinas - Reclaimed Water Auamentation Study
Paae No. 2-4
The reuse distribution system is shown in Figure 2-2. There are three main branches
of the distribution system starting at the WRF. An 8-inch line runs south along the
power easement. It follows the power easement (a portion of which is irrigated) east
to where it crosses Bahama Road. It then follows Bahama east to Shore Road. The
line then splits into 12-inch and 6-inch pipes. The pipes converge at Site 16, then a
pipe runs south to interconnect with the East reuse system and a 12-inch pipe runs
north to the northeast corner of the Winding Hollow development. At this point the
12-inch runs east to connect Winding Hollow and Stone Gable, and west to connect
Central Winds Park.
The second main is an 8-inch pipe which runs east out of the plant across the
Winter Springs Golf Course to Sheoah Blvd. At Sheoah, the 8-inch runs northeast
across the golf course to the Dayron site and a 12-inch line runs down Sheoah to 3rd
Street. The 12-inch line runs east along 3rd to Moss Road, south on Moss to
Bahama Road I and east on Bahama to interconnect with the previously described
first main.
The third main is a 12-inch pipe which runs north along the power easement
connecting Greenspoint and ending at Wildwood for a future connection.
2.3 Existing Reclaimed Demand.
The combined system currently has a demand of approximately 2.34 MGD.
Table 2-3 lists the current permitted reclaimed water sites with their permitted
capacities and their average usage (December 2003 thru November 2004).
Table 2-3. ReclaimedWater Sites .(Combined)
SITE
Tuscawilla Golf Course
East Side Public Access (Including
Resid entia I)
Winter Springs Golf Course
Residential Irrigation (West Side)
Percolation Ponds
Spray Sites (Oak Forest & Site 16)
Public Area Irri ation CWP
Total
Not Specified
1.720
0.157
0.587
0.350
0.795
1.350
0.401
0.136
4.75
0.086
0.591
0.553
0.243
0.044
2.26
As shown in Table 2-3, the permitted residential irrigation accounts for
approximately 2.51 MGD or 62% of the total permitted capacity and for
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 2-5
approximately 1.18 MGD or 52 % of the average demand. Table 2-3 also shows that
the City has additional disposal capacity to allow for fluctuations in demand as well
as supply of secondary water at this time. This allows the City to fully utilize the
available reclaimed water for beneficial residential reuse. Very little of the of the
effluent goes to non-beneficial reuse and this currently helps to conserve water and
reduces demand on the City water system. As of September 2005, there are
approximately 1,581 residential reclaimed customers. This equates to approximately
770 gallons per day per lot (customer). More detailed data provided by the City
indicates a wide range of customer usage. Therefore, 600 gpd/customer was utilized
for planning purposes. The percolation ponds and spray sites can be considered
alternate or backup sites. On the surface, it appears that there is approximately 0.70
MGD available for residential irrigation by offsetting the Ponds and spray sites.
However, the system often doesn't have enough waterfor it's customers during the
dry season and overloads the ponds and spray sites during the wet season. We
assumed that current reclaimed irrigation demand consists of the residential
connections, parks and the golf courses. The demand is approximately 1.62 MGD.
For planning purposes, we will consider the existing reclaimed demand to be 1.8
MGD.
The augmentation program will help this situation by providing more reclaimed sites,
e.g., residential and commercial irrigation for the entire year. During the wet season
(low reclaimed flow demand period), these sites will be provided with effluent rather
than being sent to the percolation ponds and dedicated spray sites. This will take the
burden off of the percolation ponds and non-public access dedicated spray sites and
allow them to be used during more extreme conditions such as abnormally high
rainfall years. During the dry season, the augmentation facility will add the water
necessary to maintain these additional residential irrigation customers and will in
turn reduce the demand on potable water sources (groundwater).
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S- AJdDfaob Date: 9-20-2005
c-m.m..~ Job No.: W04111
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CITY OF WINTER SPRINGS
RECLAIMED WATER AUGMENTATION STUDY
City of Winter Sorinos - Reclaimed Water Auomentation Study
Paoe No. 3-1
CHAPTER 3
AVAilABLE RECLAIMED POPULATION, WATER FLOWS AND SERVICE AREA
3.1 PODulation and Future land Use
Population data and projections were obtained from the Seminole County web site and is
the Socioeconomic Planning Data from Planning and Development, and are the adopted
numbers for the County's Comprehensive Plan. This data is consistent with the regional
water quality and supply goals (a.k.a. Seminole County region) and the Water Facilities
Work Plan of the City of Winter Springs. For additional information on population data, see
the Water Facilities Work Plan. These two plans have been fully coordinated.
The total growth projected for the service area is 7,210 people for the 15-year period
through 2020 based on Table 3-2, Winter Springs Data. This equals a growth of
approximately 20 percent for the planning period.
If a significant change in population projections occurs due to changes in development, the
proposed reclaimed water supply must be reevaluated. Since the reclaimed system is
interconnected between the two facilities, we have shown the combined available reuse
without regard to where it might be used in the system.
. T~BLE~:f ~ % n ~ . ,.
EXISTING S~RVlCE A~EA POPULAT:I~N:,I?ROJECTIONS
Traffic
Zone
71
72
74 (50%)
82
83
84
85
86
87
88
89
90
91
92
93
94
95
Total
Population by Traffic Zone
2000
610
2231
254
3098
4454
2205
43
73
3746
3217
806
3491
3362
2463
20
2050
2096
33,269
2002
990
2207
256
3106
4680
2279
93
86
4437
2449
859
3626
3341
2444
24
2056
2096
35,029
2008
1590
2170
248
3117
5177
2391
853
702
5473
2796
939
3861
3337
2424
31
2065
2669
39,843
2020
1613
2129
247
3151
5087
2345
853
1079
5370
2743
921
3800
3320
2378
35
2026
2618
39,715
Source: Created for this report based on Seminole County data.
Note: Traffic Zone 85 adjusted for actual and projected development in the zone
City of Winter Sprinas - Reclaimed Water Auamentation Study
Paae No. 3-2
3.2 Reclaimed Water Supplv
The reclaimed water supply is summarized in Table 3-2. From review of the historical data
presented in Table 3-2, an average daily supply of effluent of approximately 63 gallons per
capita per day (GPCD) will be available as the basis for the total supply projections.
The projected average day supply of reclaimed water for the City of Winter Springs through
the year 2020 is provided in Table 3-2. It can be seen from the table that average daily
supply for the existing service area will reach 2.77 million gallons per day by the year 2020,
corresponding to an increase of approximately 20 percent. This is an annual growth rate of
only one (1) percent over the 15-year period from 2005 to 2020. It represents an additional
0.5 MGD for use by residential connections and is equivalent to about 833 connections
(lots) at 600 gpd/lot average or 2225 people at 2.67 persons per household. Approximately
0.6 MGD of reclaimed water is available from current supplies that are not beneficially
used. This yields a total of 1.1 MGD or 1833 connections or an additional 4895 people.
TAaLE ~..2 ,
HISTORICAL AND PROJECTED POPULATION AND WASTEWATE'R 'FLOW
,
. ~ .___n__ _,__ .-- -..- ... u._.__,,__ ---.-.. . ..
Population Population East West Total Per Per
W.S. Data Sem Co WRF WRF Capita Capita
Data (MGD) (MGD) Actual AveraQe
2000 34,570 33,269 1.020 0.940 1.96 57
2001 34,824 1.098 1.102 2.20 63
2002 35,505 35,029 1.072 1.142 2.214 62
2003 35,931 1.171 1.115 2.286 64
2004 36,362 1.160 1.156 2.316 64 63
2005 36,798 2.32
2006 37,240 2.35
2007 37,687 2.37
2008 38,139 39,843 2.40
2009 38,597 2.43
2010 39,060 2.46
2011 39,529 2.49
2012 40,003 2.52
2013 40,483 2.55
2014 40,969 2.58
2015 41 ,461 2.61
2016 41,958 2.64
2017 42,462 2.68
2018 42,971 2.71
2019 43,487 2.74
2020 44,008 39,715 2.77
Notes:
Winter Springs Based on 1.2% Projected Annual Growth.
Projections of flow based on 63 gpcd.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 3-3
For projection purposes, the Winter Springs data was used as this would be the more
conservative approach. Use of higher population data will cause the improvements to be in
place prior to the need.
The St. Johns River Water Management District (SJRWMD) is increasingly requiring public
water suppliers to implement methods of wastewater reuse to reduce groundwater
withdrawals from the aquifer and the existing system along with expansion will benefit the
City when re-applying for a new Consumptive Use Permit.
3.4 Service Area Growth
The City of Winter Springs is highly developed and is surrounded by other highly developed
areas. To the West of U.S. 17-92 is the Longwood service area; to the South is the
Casselberry and Seminole County service areas; to the Southwest is the Oviedo service
area; and to the North is Lake Jesup. The area available for future service area is the
Northwest quadrant of the S.R. 417 and S.R. 434 intersection. Some of this area has
already been incorporated into the Winter Springs City Limits and has become part of the
Winter Springs service area. We have included this area up to Canal Street and North of
S.R. 434/Florida Avenue to Lake Jesup. This area is currently zoned suburban-residential.
County zoning designations are A-3; A-5 and A-10 for the area.
City of Winter SorinQs - Reclaimed Water Auamentation Study
Paae No. 4-1
SECTION 4
ANALYSIS
4.0 Analysis
The expansion of the reclaimed water system with the supplementation or
augmentation of surface water from Lake Jesup was analyzed based on the
treatability of the Lake Jesup water and the feasibility of the implementation and
construction of the distribution system. Based on the City map and other available
data and planning sessions with the city staff, there are potentially 11,318 residential
units/customers in the service area, of which 1,581 are connected, leaving 9737
potential connections. This number includes all townhomes and condominiums
available for service. Current development trends in the City are for higher density
townhome/condominium units which have a much lower demand for reclaimed
water. We do not believe that all water customers will utilize secondary water for
irrigation. Not every lot owner will invest in an in-ground irrigation system and pay
the monthly fees associated with irrigation. Also, some customers are in
townhomes, apartments and condominiums which will not use reclaimed water to
the same extent as single family homes. Therefore, for planning purposes we
identified 6,672 future connections (total available units are 8253 minus 1581
existing connections) based on the number of single family detached units within the
service area. Using the 80% factor described herein, the planning number for new
connections is 5338 future connections. The current reclaimed water usage of the
existing customer base averages less than 600 gpd/customer on an annual basis.
The usage ranges between 250 and 700 gpd per customer. This was based on a
random sampling of existing customer accounts. For planning purposes, we used
the higher average to assure that the system has the ability to serve the potential
demand. Historically, we have seen a 35-50% participation in retrofit reclaimed
water irrigation programs. We have projected an overall average herein of 80%
because the trend is for more people to use reclaimed water as a secondary source
as acceptance of this grade of water grows.
The golf courses, residential irrigation and the public area irrigation, such as the
parks, are also beneficial irrigation sites. The percolation ponds and the spray sites
are secondary, or backup, disposal sites. The total beneficial irrigation demands
yields a projected total demand of approximately 5.0 MGD AADF, including existing
reclaimed demand. This figure is based on 600 gpd per customer annual average
daily flow; 300 gpd per customer for the wet season flow; and 900 gpd per customer
for the dry season flow. It consists of 3.20 MGD AADF future flow (0.8*6672
customers*600 gpd/customer) and 1.8 MGD existing demands. Currently, the two
WRF's can only supply 2.32 MGD based on their average dailyflow. The projected
supply by 2020 is 2.77 MGD based on projected population growth. The remaining
2.23 MGD AADF, say 2.25 MGD AADF for planning purposes, could be withdrawn
from Lake Jesup to supplement the demand. This number should be increased to
4.73 MGD (5.0 MGD AADF * 1.5 dry season peaking factor minus 2.77 MGD
effluent available) to account for a higher demand during the dry season. The dry
City of Winter Sorinas - Reclaimed Water Auamentation StudY
Pace No. 4-2
season will be the time of year where the demand will be the highest and the time of
year where supplementation will also be required.
This data was cross-checked with the water plant usage. The three water treatment
plants combined average approximately 3.784 MGD. Irrigation water can be as
much as 30-40% of the potable water usage in a system. By assuming that the
water plant irrigation production is 30%, the supplementation from Lake Jesup would
need to be approximately 1.135 MGD. However, customers typically use reclaimed
water at higher volumes than potable water due to the lower cost. Therefore, the
range of supplementation would be a low of 1.135 during the wet season to a high of
4.73 MGD during the dry season (assuming 80% participation and a dry season
demand of 900 gpd/customer). We believe the facility should be designed for a 2.25
MGD AADF rate in two phases.
In discussions with City staff, it was determined that many older established areas
within the western part of the City do not have automatic irrigation systems. This
accounts for some of the difference between the projected reclaimed flows versus
the actual water plant flows. We expect that the demand for reclaimed water will
change the current situation as it will provide a cheaper source of water for irrigation
purposes. The different areas were analyzed and discussed with the City to
determine the most effective and beneficial sites to add to the system over time.
This prioritization is based on expansion of the system from the existing
infrastructure outward equally distributed between the two wastewater effluent
sources and one augmentation source. It is not based on projected demand or
potential for disposal. This maximizes the use of the existing infrastructure. The
expansion of the reclaimed water distribution system has been prioritized and is
further detailed in Section 5.0.
4.1 Available Artesian Well
An artesian well exists within the Parkstone subdivision directly west of the proposed
augmentation treatment site. It is located at the east end of Sandringham Court.
Attempts have been made by the St. Johns River Water Management District to
plug/cap this well, but these efforts have unfortunately failed. However, we believe
we can turn this into an advantage for the augmentation system. The water quality
of this well is very good. It does not contain solids and the turbidity is low. It can
easily be used for irrigational purposes or to supplement the reclaimed water
system. We propose a routing of this flow to a new submersible pump station. When
demand is high for reclaimed water, this well water can be pumped to the
supplementation site and stored in the storage facility for distribution into the
reclaimed water system. It is estimated that this well flows at a rate of one (1) million
gallons per day. If the flow is not required, it will flow through the off-line submersible
pump station and into Lake Jesup as it presently does. The transfer line will be
approximately six (6) inches in diameter and will be routed along rights-of-way and
easements to the augmentation facility. The line is approximately 3420 lineal feet. At
a cost of $50.00/LF, the estimated construction cost is $171,000.
City of Winter SprinQs - Reclaimed Water AUQmentation Study
PaQe No. 4-3
4.2 Distribution System Analysis
The demand was incorporated as part of a distribution pipe model known as
WaterCAD, a computer hydraulic modeling software. The City's current reclaimed
water piping model was expanded to encompass the entire City. The demand was
based on 100% participation over an 8-hour irrigation period. The model was run
several times to estimate the necessary pipe sizing, using a maximum pipe velocity
of 5 feet per second (fps) as a guideline, and to estimate the required withdrawal
from Lake Jesup. The distribution system demand is based on a peak condition to
allow the system to operate properly during the dry season. The modeled demands
will necessarily be higher than the annual average demands discussed in other
Sections of this report.
The model was run using a "worst-case" scenario, which assumes all future
residential connections use 900 gpd (dry season demand). This scenario, while also
assuming a 100% connection rate, produces a reclaimed water demand of
approximately 8 MGD. The peak demand would occur during the driest months of
the year, when the demands are higher. The system must be capable of supplying
water during these seasonal variations. Therefore, the model was run using the
peak usage rate of 900 gpd/lot. The model was evaluated using a peak condition of
12 MGD, which assumes 50% of the connections are running over an 8-hour
irrigation period. This is equivalent to a peaking factor of 1.5 times the dry season
demand. The dry season demand is 1.5 times to AADF, so the combined peaking
factor is 2.25. A 50% connection rule was used because of the current SJRWMD
water conservation regulations. By spreading the demand equally and designing to
conservative criteria, the system can be fully designed and be capable of handling
higher flows, velocities, and pressures in localized areas.
The model was initially analyzed in a 'built-out' scenario. This initial model run
served to determine the necessary pipe sizes throughout the system. The next step
was to break the system into logical, constructable 'Phases'. Seven total Phases
were developed, as shown on Figure 4-1. The model was then run for each Phase,
in sequence, to determine if the pipe sizes required for the ultimate scenario will be
adequate for each intermediate scenario. The Phases and modeling results are
further detailed in Section 5.
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City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 4-5
4.3 Treatment System Analysis
4.3.1 Reclaimed Water Supplv
The Water Reclamation Facilities have a combined treatment capacity of 4.082
MGD. They are currently running at approximately 2.32 MGD. As the City grows, the
wastewater supply to the WRF's will grow as well. However, if reclaimed water
irrigation systems are required on all new developments, more reclaimed water will
be required than is generated by each new development, e.g., sewerage flows
generated by new households are about one-third of the irrigation demand.
Therefore, the needs of the system were determined based on the current supply
and potential demand for reclaimed water. Based on the needs previously discussed
in Section 3.0 and this section, the total annual average daily demand is estimated
to be a approximately 5.0 MGD. This yields a shortage of approximately 2.25 MGD
AADF (4.73 MGD dry season as described above) if we are to provide all projected
secondary uses (non-potable) with a separate water supply source, a.k.a., reclaimed
and augmentation water.
The main sources for irrigation water augmentation are: surface water, ground
water, or stormwater. One of the purposes of this expansion of the reclaimed water
system is to take demand off of the aquifer, which is the primary potable water
source for the area. Therefore, using ground water (including shallow wells) as an
augmentation source ~erves no beneficial purpose except in the case of the artesian
well described in Section 4.1. Stormwater systems are a viable source of low volume
irrigation needs. Most stormwater systems are not designed to hold excess water,
which can be used for irrigation. They are not large reservoirs available for use when
needed by the demand. They are scattered throughout the City and multiple pump
stations and treatment facilities would be required. Further, many stormwater
system have no available water or are completely dry during the dry season when
the augmentation water would be needed most. The surface water option is the
most feasible and beneficial. Central Winds Park, which is owned by the City,
borders on Lake Jesup. Property adjacent to the park has been purchased by the
City Utility Department. This adjacent property can easily accommodate a Facility to
withdraw and treat the surface water to reclaimed water standards to be blended
into the existing reclaimed water distribution system.
4.3.2. Treatment of Surface Water
The treatment process required on Lake Jesup water would not be a difficult one.
The water quality is within normal surface water ranges, and the proposed use is
non-potable. Therefore, many chemical parameters can remain unchanged. Nutrient
removal would not be required to utilize the surface water for public access irrigation
purposes. It is required that the water be safe from a bacteriological standpoint and
as such, the suspended solids would have to be reduced so that the chlorination
City of Winter SorinQs - Reclaimed Water AUQmentation Study
PaQe No. 4-6
processes can properly remove ("kill") the bacteria that may exist in the surface
water. The current standards do not require a chlorine residual in the distribution
system and even if they did, this would not be difficult to accomplish. Water must
meet high-level disinfection criteria prior to leaving the treatment facility or the "Point
of Entry" into the distribution system.
The treatment process must meet the following criteria to be viable as an
augmentation system:
1. Must be flexible in terms of capacity of flow treated and on-off
conditions.
2. Must be easily started and usable water must be immediately
available to the distribution system.
3. Must be able to withstand extended downtime without adverse affects
on treatment.
The treatment provided will be low service supply pumps, filtration, transfer pumps,
storage, disinfection via the storage tanks and high service distribution pumps. Lake
Jesup also acts as a storage reservoir and the treatment facility needs to be
designed as an "on-demand" system. We recommend that the facility be operated
as a supplemental facility in all aspects. The facility should be connected into the
SCADA System and when needed, it will be activated and the pumps will supply
flow to the filters. If demand drops off, the system will be automatically shut down.
Monitoring of turbidity will be required and if either fails to meet the requirement, the
system will be shut down.
To accomplish our goals, it will be necessary to have a filter system that can sit idle
and then be called into use and also provide a variable rate flow without degradation
of filtration ability. We believe the only filters that can achieve this is the fabric disk
type filter or the coarse filter membranes suspended in a tank. Further research
would be required during the preliminary engineering design phase of this project.
We evaluated the pressure disk type filters for another project and found that they
could not remove the algae from pond water to a low enough concentration to meet
public access criteria. This pond was a "controlled" environment and did not have
the TSS contaminants like Lake Jesup. The Turbidity and TSS parameters were
much too high to be removed without chemical addition. Further research is required
to find the best treatment option.
The filter backwash would be sent to the West WRF via the lift station I forcemain
system. The backwash generated will depend on the treatment process and will also
need to be evaluated during preliminary design.
4.3.2.1 Filtration Evaluation
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 4-7
Plastic Disk Screens - Two years ago we tested a product in Eustis on a reclaimed
water holding pond. This was a hypalon lined pond at their hayfield disposal site.
The disc filter was an in-line pressure filter system. The discs are plastic and
separation occurs by serrations in the discs. During filtration, the discs are
compressed together and they expand during backwashing. This system cannot
produce turbidity levels below 5 TSS. Much of the algae in the pond was forced
through the openings and not separated. TSS levels "in" were 30-35 mg/l and "out"
were 10-15 mg/l. This product would not be acceptable for our needs on this project.
Stainless Steel Filter Screens - Two years ago we tested a stainless steel filter
screen at the East WRF. This product was used on the effluent from the holding
pond. It did not produce satisfactory results.
Pressure Stainless Steel Screens - This is a similar product to the plastic disk
screen and has the same problem of pushing solids through the screen under
pressure.
Fabric Covered Disk Filters - The City of Eustis main wastewater treatment plant
has fabric disk filters by Aqua Aerobics. These have been in place for several years
and are operating with no problems. We believe this type of filter meets the criteria
above and we also know they can meet a 5 TSS criteria. The filters can sit inactive
for long periods of time with no adverse affects. When placed out-of-service, they
must be backwashed/cleaned and placed on standby.
Dvna-Sand - These filters were eliminated from further consideration because they
need to be constantly operated to prevent them from "binding". They work on the
principle of a fluidized bed and if they are left alone, the media has a tendency to
"solidify". We do not recommend this filtration system for this project.
Gravitv Sand Filters - These filters were also eliminated from further consideration
because they need to be constantly operated to prevent them from "binding". We do
not recommend this filtration system for this project.
Membranes - Membranes are used on a variety of project and we believe they can
be used for this application as well. They are a viable candidate and can be left in
the "wet" condition and operated when needed. Further consideration should be
given to this product.
4.3.3 Lake Jesup Auqmentation
The Lake Jesup water quality was evaluated to determinate what kind of treatment
is necessary before it can be pumped into the network. To complete this objective
the last 6 years physical-chemical data reports for this water was analyzed. The
data was supplied by the St. Johns Rivers Water Management District (SJRWMD)
and it corresponds to the daily data of the samples taken in seven different points
around the lake from 1997-2002. The data includes the values for the pH, TSS,
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 4-8
TDS, Chloride, and Sulfate. This data is attached in Appendix A. Monthly and annual
averages as well as seasonal variations were analyzed for each parameter.
These parameters were then compared against the minimum requirements set forth
by the Florida Department of Environmental Protection. FDEP requires that all
waters entering reclaimed water systems must meet the same standards as the
wastewater facility permit. The FDEP requires high-level disinfection and Total
Suspended Solids reduction to meet the public access reuse criteria (62-
61 0.472(3)a1). Another criteria is to compare these values with the Secondary
Drinking Water Standards and is shown in Table 4-1. It compares the quality of the
surface water to secondary drinking water standards. Also shown in Table 4-1 is
each parameters average, dry, and wet season value as accumulated by the
SJRWMD.
The total dissolved solids (TDS) value averages between 550 to 750 mg/L
throughout the year. The TDS typically peaks at around 750 mg/L during the June
and July summer season. This timeframe also presents the highest peaks of the
year, with the highest recorded value being almost 1200 mg/L. The annual average
TDS concentration is approximately 630 mg/L. The secondary drinking water
standard value for this parameter is a maximum of 500 mg/L.
Sulfates average between 40 and 80 mg/L per month with an annual average of
approximately 61 mg/L. The secondary drinking water standard value is 250mg/L.
There were no samples in the seven year period that exceeded the seconda'ry
drinking water standard.
Chlorides average between 170 and 340 mg/L per month with an annual average of
approximately 250 mg/L. The secondary drinking water standard value for chlorides
is 250 mg/L. This standard is typically exceeded from March to August. The
maximum recorded value was close to 500 mg/L. Chlorides could be a problem
because high chlorides have an adverse effect on vegetation.
The TSS value averages between 20 to 65 mg/L per month with an annual average
of approximately 35 mg/L. The FDEP standard value for TSS is 5 mg/L. The TSS
typically peaks in June with a recorded high of 97 mg/L. The treatment system
needs to be capable of reducing the TSS by 31 mg/L on average and by 61 mg/L
during peak conditions.
The pH of the water is typically between 8.0 and 9.5 throughout of the year. During
the summer season the pH increases to a maximum of 9.5. The secondary drinking
water standard for pH is between 6.5 and 8.5.
All of the parameters show a tendency to peak around June-July and reach a low
point around November-December. Overall, the treatability of the water from Lake
Jesup to non-potable public access irrigation standards is good. Options to treat this
water to FDEP standards is further discussed herein. Irrigation demand is generally
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 4-9
lower in June/July due to rainfall and therefore, the augmentation system would not
be fully utilized during this timeframe.
City of Winter Sorinas - Reclaimed Water Auamentation Study
1Q
Paae No. 4-
Table 4-1. lake Jesup Water Quality Data
-- .,....~, ~... . .--~- ,-~~ --~, - . - -.--.
Secondary Drinking Average Dry Wet
Parameter Units Water levels Season Season
Field PH 6.5-8.5 8.69 9.43 7.89
Total Suspended
Solids mg/I 5 35.43 65.49 20.63
Chloride mg/I 250 250.11 338.38 176.06
Sulfate mg/I 250 61.12 81.04 40.78
Total Dissolved
Solids mQ/1 500 631.46 753.09 543.80
This water quality data represents key water quality indicators and by no means
represents all the possible contaminants that could be in the surface water. This
available data, however, does provide us with the ability to decide if surface water
augmentation from Lake Jesup is feasible. We believe that these parameters
indicate that Lake Jesup water can be used as an augmentation source and that
they may supply the needs of the City without adverse affects on the reclaimed
water system.
None of these known parameters are at consistent high level concentrations that
would cause any known effects on landscape plants or grasses. Many people utilize
lake and storm waters for landscape irrigation without any treatment. This water
should substitute directly for reclaimed water. Lake Jesup is not a typical source of
surface water. Water quality parameters tend to be on the higher side of
concentrations and are bumping up against the concentrations that cause
agricultural concerns. Generally, chloride buildup in the soil may have an adverse
effect on plants. The literature indicates that chlorides less than 500 mg/I and TDS
less than 1000 mg/I will not have an adverse effect on plants. In addition, this water
will be blended with effluent from the Water Reclamation Facilities. The annual
average values are within normal tolerant ranges.
4.4 Reclaimed Storage
The recommended storage capacity is four (4) million gallons and is equivalent to
one day's flow rate. The storage will be matched to the flow rate by two phases.
Each phase will include a two (2) million gallon storage tank. Storage allows the
treatment facilities to operate over a 24-hour period and the distribution system to
operate over a demand period of shorter duration. Current water conservation
regulations do not allow irrigation between the hours of 10 A.M. to 4 P.M. and only
twice per week. This is the even/odd cycle. This leaves too many days unused and
an inefficient way of sizing equipment because there are three days left over in
every week. Irrigation is allowed over 10 hours, but many households like to water
in the morning hours; typically before 9 A.M. and after 1 A.M. (an eight-hour
City of Winter Sorinas - Reclaimed Water Auamentation Study
11
Paae No. 4-
window). New rules are proposed that may revise current regulations especially
concerning the days of allowable irrigation. The goal of the City would be to have the
demand spread evenly over the longest cycle. Irrigation of reclaimed water
(including supplementation) is allowed 24 hours per day provided there is a sign on
the property indicating that reclaimed water is being used.
4.5 Site Plan
Figure 4.2 shows a preliminary site plan for an equipment building, filtration, transfer
pump station, access driveway, two (2) two-million gallon storage tanks and five (5)
distribution pumps (can turbines). Chlorination, if required, will be fed directly into the
ground storage tanks. As described elsewhere in this report, the improvements will
be constructed in two phases.
City of Winter Sonnqs - Reclaimed Water Auqmentation Study
Paqe No. 5-1
SECTION 5
SYSTEM EXPANSION
5.0 System Expansion
As discussed in Section 4, the expansion of the system to supply reclaimed or
alternate source water throughout the City was divided into ten Phases. This Section
will discuss the necessary facility improvements and the necessary infrastructure
(piping) improvements. These improvements will be correlated to each other to
provide a cohesive picture of how the system will develop through the Phases.
5.1 Treatment System Expansion
The withdrawal and treatment of surface water from lake Jesup can be
implemented in Phases according to the amount of augmentation water required.
Based on data obtained from the City, the system currently would benefit from
augmentation water. After completion of the seven distribution system expansion
Phases, the ultimate projected augmentation quantity is 2.25 MGD AADF. Two
1.125 MGD Treatment Phases are proposed to meet the needs of the City as further
described below.
To withdraw augmentation water from lake Jesup and put it in the reclaimed water
distribution system requires treatment as described in Section 4.2.2. Most of the
augmentation will occur during the dry season, therefore the augmentation facility
must be designed based on the treatment levels in Table 5-1.
Table 5-1. Lake Jesup Water QuaUty Data I Removal Criteria
--.... ~_.'.\-.....__T_ " -- - ~.". ~ -~--.........~-
Required Pre- Treatment % Removal
Parameter Units levels levels
Field PH N/A 9.4
Irotal Suspended
Solids mg/l 5 65 92.4
Chloride mg/l N/A 338
Sulfate mg/l N/A 81
Irotal Dissolved
Solids moll N/A 753
The lake Jesup water will have to be treated to public access and high-level
disinfection standards, requiring filtration and disinfection. The augmentation facility
will need the following components: surface water withdrawal pumping station;
coagulation; filtration system; disinfection system; and distribution pumping station.
Phase A
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-2
The first Phase of the augmentation system will have a capacity of 1.125 MGD
AADF. The augmentation site will be located in Central Winds Park as shown in
Figure 2-1 and will consist of the following components:
1. Surface water withdrawal pumping station. The pumping station will be
designed to withdraw 1.125 MGD AADF from Lake Jesup. The suction
piping can be laid horizontally into the Lake. Measures should be
provided to prevent clogging by fish, algae growth, etc. of the suction/inlet
pipe.
2. The surface water shall be filtered to meet reuse requirements as
specified by the Florida Department of Environmental Protection.
3. The disinfection system must meet high-level disinfection criteria as
required by FDEP. We believe this can be met by the wet wells and
storage system.
Phase A would have a capacity of 1.125 MGD AADF and is estimated to cost
approximately $2,646,420, as detailed in Table 5-2.
Table 5-2. Treatment Facility Costs
ITEM Total Cost
Mobilization/Site work (5%) $100,000
Low Service Supply Pump (3 $75,000
oumos)
Coaaulation Chemical Feed $50,000
Filtration $250,000
Wetwells / Tanks $200,000
Disinfection System $50,000
Artesian Well Pump Station $75,000
Artesian Suooly Line $171,000
Electrical/Control Build ing $30,000
SCADA $25,000
Electrical $105,000
Storaae - 2.0 MG $750,000
Distribution Pump Station (3 $150,000
can Dum os)
Residual Backwash Pump $75,000
Station
Continaencv (10%) $200,000
DesiQn/Survey (7%) $140,420
Leaa 1/ Ad ministrative/etc.( 5%) $100,000
Construction Administration $100,000
(5%)
TOTAL $2.646,420
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-3
Phase B
Phase B should be constructed as a duplicate parallel facility to Phase A, as shown
in Figure 4-2. Several items do not require duplication. The costs are estimated to
be $1,610,400 and are shown in Table 5-3 with no increase due to inflation.
Table 5-3. Treatment Facili Costs
Total Cost
$61,000
$50,000
$250,000
$15,000
$55,000
$750,000
$100,000
$122,000
$85,400
$61,000
$61 ,000
$1,610,400
5.2 Distribution System Expansion
Table 5-4 lists the proposed expansion Phases and the projected demand of each
Phase. The following analysis assumes that connection will not be mandatory and
80% of the connections will be made and reclaimed water will actually be used at
the projected rate. The cost of constructing additional distribution systems is based
on an average of $2500 per connection and includes piping, restoration and services
and meters.
Table 5-4. Distribution System Expansion Phases
~., . ".-" ,-,'--. . ..- .. .
Year Phase Potential Percent Connections Peak Average Cumulative
Connec- Connected Demand Demand Demand
tions (MGD) (MGD) (MGD)
Existinq 2.400 1.800 1.800
2008 1 1024 80 819 0.737 0.491 2.291
2010 2 1001 80 800 0.720 0.480 2.771
2012 3 1029 80 823 0.741 0.494 3.265
2014 4 1021 80 817 0.735 0.490 3.755
2016 5 1029 80 823 0.741 0.494 4.249
2018 6 946 80 757 0.681 0.454 4.703
2020 7 622 80 498 0.448 0.299 5.000
TOTAL 6672 5338 5.660 4.530 5.000
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-4
Phase A of the augmentation treatment plant will last through the end Phase 3
(WRF flow 2.3 MGD and augmentation flow of 1.125 MGD equals 3.425 MGD) of
the distribution system expansion. In 2012, Phase B of the augmentation facilities
would be constructed.
Phase 1
This Phase will be constructed to meet the demand created by 1024 residential lots.
The total demand is estimated to be an average of 491,520 gallons per day. Table
5-5 lists the developments included in this Phase and the seasonal demands.
In coordination of the construction of Phase 1 of the distribution system, Phase A of
the Lake Jesup Augmentation Facility should be constructed.
Table 5-5. Phase 1 - Capacity Data (80% Connected)
SUBDIVISION Total Average Dry Wet Average Dry Wet
NAME Lots Flow! Season Season Flow Season Season
Unit Flow! Flow! (gpd) Flow Flow
(g pd) Unit Unit (gpd) (gpd)
(gpd) (gpd)
Arbor Glen (Tusc. 38 600 900 300 22,800 34,200 11 ,400
Parcel 90)
Carrington Woods 76 600 900 300 45,600 68,400 22,800
Chestnut Estates 49 600 900 300 29,400 44,100 14,700
Davenport Glen 70 600 900 300 42,000 63,000 21,000
Glen Eagle 257 600 900 300 154,200 231 ,300 77,100
Highlands Sec. 3 26 600 900 300 15,600 23,400 7,800
Highlands Section 58 600 900 300 34,800 52,200 17 ,400
7-8
North Orlando 155 600 900 300 93,000 139,500 46,500
Terrace Sec 3-5
Oak Forest Unit 4 75 600 900 300 45,000 67,500 22,500
Oak Forest Unit 5 94 600 900 300 56,400 84,600 28,200
Tuskawilla Unit 87 600 900 300 52,200 78,300 26,100
12!12A
Tuskawilla Unit 39 600 900 300 23,400 35,100 11 ,700
13
Total 1024 614,400 921,600 307,200
80% factor 819 491 ,520 737,280 245,760
The cost of this Phase is estimated to be $2,047,500.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-5
Phase 2
This Phase will be constructed to meet the demand created by 800 residential lots.
The total demand is estimated to be an average of 480,000 gallons per day. Table
5-6 lists the developments included in this Phase and the seasonal demands.
Table 5-6 Phase 2 - Capacity Data '(80% Connected)
SUBDIVISION Total Average Dry Wet Average Dry Wet
NAME Units Flow! Season Season Flow Season Season
Unit Flow! Flow! (gpd) Flow Flow
(gpd) Unit Unit (gpd) (gpd)
(apd) (a pd)
Chelsea Woods - 135 600 900 300 81,000 121,500 40,500
South
Highlands 131 600 900 300 78,600 117,900 39,300
Sections 4-5
North Orlando 151 95 600 900 300 57,000 85,500 28,500
Addition
North Orlando 123 600 900 300 73,800 110,700 36,900
Terrace Sec 8-9
Unit 2
Oak Forest Unit 3 114 600 900 300 68,400 102,600 34,200
Oak Forest Unit 8 131 600 900 300 78,600 117,900 39,300
Tuscawilla Unit 72 600 900 300 43,200 64,800 21,600
11 A/11 B
Tuscawilla Unit 8 78 600 900 300 46,800 70,200 23,400
Wildwood - East 122 600 900 300 73,200 109,800 36,600
Total 1001 600,600 900,900 300.300
80% factor 800 480,000 720,000 240,000
The infrastructure cost of this Phase is estimated to be $2.000.000.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-6
Phase 3
This Phase will be constructed to meet the demand created by 823 residential lots.
The total demand is estimated to be an average of 617,400 gallons per day. Table
5-7 lists the developments included in this Phase and the seasonal demands.
Table 5-7 Phase 3 - Capacity Data (80% Connected)
SUBDIVISIONS Total Average Dry Wet Average Dry Wet
Units Flow! Season Season Flow Season Season
Unit Flow! Flow! (gpd) Flow Flow
(g pd) Unit Unit (gpd) (g pd)
(aDd) (aDd)
Bear Creek Estates 67 600 900 300 40,200 60,300 20,100
Foxmoor Unit 1 81 600 900 300 48,600 72,900 24,300
Highlands Section 1 117 600 900 300 70,200 105,300 35,100
North Orlando 113 600 900 300 67,800 101,700 33,900
North Orlando 74 44,400 66,600 22,200
Terraces Unit 3
North Orlando 48 600 900 300 28,800 43,200 14,400
Terraces Unit 6
Oak Forest Unit 6 154 600 900 300 92,400 138,600 46,200
Oak Forest Unit 7 93 600 900 300 55,800 83,700 27,900
Tuscawilla Unit 11 28 600 900 300 16,800 25,200 8,400
Tuscawilla Unit 6 90 600 900 300 54,000 81,000 27,00
Tuscawilla Unit 88 600 900 300 52,800 79,200 26,400
9!9A
Tuscawilla Unit 9B 76 600 900 300 45,600 68,400 22,800
Total 1029 617,400 926,100 308,700
80% factor 823 493,920 740,880 246,960
The infrastructure cost of this Phase is estimated to be $2,057,500.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-7
Phase 4
This Phase will be constructed to meet the demand created by 817 residential lots.
The total demand is estimated to be an average of 490,080 gallons per day. Table
5-8 lists the developments included in this Phase and the seasonal demands.
In coordination of the construction of Phase 4, construction of Phase B of the Lake
Jesup Augmentation Facility is necessary and construction will start during the prior
year.
Table 5-8 Phase 4 - Capacity Data (80% Connected)
SUBDIVISIONS Total Average Dry Wet Average Dry Wet
Units Flowl Season Season Flow Season Season
Unit Flowl Flowl (g pd) Flow Flow
(gpd) Unit Unit (gpd) (gpd)
h~pd) (gpd)
Arrowhead Unit 1 6 600 900 300 3,600 5,400 900
(Northern Way
Bentley Green/Club 66 600 900 300 39,600 59,400 19,800
Chestnut Ridge 52 600 900 300 31,200 46,800 15,600
Fairway Oaks 72 600 900 300 43,200 64,800 21,600
Foxmoor East 35 600 900 300 21,000 31,500 10,500
Foxmoor Units 2-3 190 600 900 300 114,000 171,000 57,000
Jackson Circle 10 600 900 300 6,000 9,000 3,000
Oak Forest Units 163 600 900 300 97,800 146,700 48,900
2/2A2B
St Johns Landing 31 600 900 300 18,600 27,900 9,300
The Reserve at 92 600 900 300 55,200 82,900 27,600
Tuscawilla Ph 1-2
Tuscawilla Trace 24 600 900 300 14,400 21,600 7,200
Tuscawilla Unit 7 79 600 900 300 47,400 71,100 23,700
Walden Terrace 63 600 900 300 37,800 56,700 18,900
Winter Springs 138 600 900 300 82,800 124,200 41 ,400
Unit 4 - East
Total 1021 612,600 918,900 305,400
80% factor 817 490,080 735,120 244,320
The infrastructure cost of this Phase is estimated to be $2.042.500.
City of Winter Sorinas - Reclaimed Water Auamentation StudY
Paae No. 5-8
Phase 5
This Phase will be constructed to meet the demand created by 823 residential lots.
The total demand is estimated to be an average of 479,520 gallons per day. Table
5-9 lists the developments included in this Phase and the seasonal demands.
Table 5-9 Phase 5 - Capacity Data (80% Connected)
SUBDIVISIONS Total Average Dry Wet Average Dry Wet
Units Flow! Season Season Flow Season Season
Unit Flow! Flow! (gpd) Flow Flow
(gpd) Unit Unit (g pd) (gpd)
(gpd) (gpd)
North Orlando 2na 165 600 900 300 81,000 148,500 49,500
Addition
North Orlando 291 600 900 300 174,600 261,900 87,300
Ranches 8-10
Oak Forest Unit 1 114 600 900 300 68,400 102,600 34,200
Wicklow Greens 48 600 900 300 28,800 43,200 14,400
Winter Springs 383 600 900 300 229,800 344,700 114,900
Unit 4 - West
Woodstream 28 600 900 300 16,800 25,200 8,400
Total 1029 599,400 926,100 308,700
80% factor 823 479,520 740,880 246,960
The infrastructure cost of this Phase is estimated to be $2.057.500.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-9
Phase 6
This Phase will be constructed to meet the demand created by an estimated 80% of
the 757 residential lots. The total demand is estimated to be an average of 195,200
gallons per day. Table 5-10 lists the developments included in this Phase and the
seasonal demands.
Table 5-10 Phase 6 - Capacity Data (80% Connected)
SUBDIVISIONS Total Average Dry Wet Average Dry Wet
Units Flow! Season Season Flow Season Season
Unit Flow! Flow! (g pd) Flow Flow
(g pd) Unit Unit (gpd) (gpd)
(g pd) (gpd)
Mt Greenwood 73 600 900 300 43,800 65,700 21,900
Unit 1
Mt Greenwood 150 600 900 300 93,600 140,400 46,800
Unit 5
North Orlando 218 600 900 300 130,800 196,200 65,400
4th Addition
North Orlando 22 600 900 300 13,200 19,800 6,600
Ranches Sec 1
(Bahama)
North Orlando 221 600 900 300 132,600 198,900 66,300
Ranches Sec
2!2A
North Orlando 60 600 900 300 36,000 54,000 18,000
Ranches Sec 3-
5
Winter Springs 202 600 900 300 121,200 181,800 60,600
Units 2-3
Total 946 571,200 856,800 285,600
80% factor 757 456,960 685,440 228,480
The infrastructure cost of this Phase is estimated to be $1,892,500.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-10
Phase 7
This Phase will be constructed to meet the demand created by 498 residential lots.
The total demand is estimated to be an average of 298,560 gallons per day. Table
5-11 lists the developments included in this Phase and the seasonal demands.
Table 5-11. Phase 7 - Capacity Data (80% Connected)
. ~
SUBDIVISIONS Total Average Dry Wet Average Dry Wet
Units Flow! Season Season Flow Season Season
Unit Flow! Flow! (gpd) Flow Flow
(gpd) Unit Unit (gpd) (gpd)
(gpd) (gpd)
Dunmar 20 600 900 300 12,000 18,000 6,000
North Orlando 115 600 900 300 69,000 103,500 34,500
Ranches Sec
1!1N1 B
North Orlando 84 600 900 300 50,400 75,600 25,200
Ranches Sec 6-7
Parkstone 396 600 900 300 237,600 356,400 118,800
Tuscawilla Unit 5 7 600 900 300 4,200 6,300 2,100
Total 622 373,200 559,800 186,600
80% factor 498 298,560 447,840 149,280
The infrastructure cost of this Phase is estimated to be $1.245.000.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 5-11
Table 5-12 is a compilation of the data of Sections 3,4 and 5, showing the available
effluent, projected demand (ADF and Peak) and the augmentation required to meet
the demands. The projected demands for irrigation water includes an existing value
of 1.8 MGD AADF and 2.4 MGD dry season demand for existing residential
customers, the two golf courses and the Central Winds Park demands.
P' ,.... .".~ .~. .~ Table_.5:-:.12...~ugmentati~J.LN.e.e.d.s ....;.or. ""'..--__ ~.
Year Irrigation Lake Effluent Average Augmentation Peak Augmentation
Ending Phase Jesup Available Reclaim Needed Reclaim Needed
September Phase Needed (Average) Needed (Dry Season)
30
2005 2.32 1.8 N/A 2.4 N/A
2006 2.35 1.8 N/A 2.4 N/A
2007 A 2.37 1.8 N/A 2.4 N/A
2008 1 2.40 2.29 0 3.14 0.74
2009 2.43 2.29 0 3.14 0.71
2010 2 2.46 2.77 0.31 3.86 1.40
2011 2.49 2.77 0.28 3.86 1.37
2012 3 2.52 3.27 0.75 4.60 2.08
2013 B 2.55 3.27 0.72 4.60 2.05
2014 4 2.58 3.76 1.18 5.33 2.75
2015 2.61 3.76 1.15 5.33 2.72
2016 5 2.64 4.25 1.61 6.07 3.43
2017 2.68 4.25 1.57 6.07 3.39
2018 6 2.71 4.70 1.99 6.75 4.04
2019 2.74 4.70 1.96 6.75 4.01
2020 7 2.77 5.00 2.23 7.20 4.43
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 6-1
SECTION 6
PERMITTING
6.0 FDEP
The FDEP is responsible for permitting the use of the treated lake water as a
supplemental source for use within the reclaimed water system. FDEP will review
the process equipment and design and check for compliance with the provisions of
the Reclaim Water Rules. We must go through this process because we are
blending the lake water with reclaim water from two treatment facilities. FDEP will
be concerned with the water quality and that the supplemental water use will not
cause a violation of the wastewater permits.
6.1 SJRWMD
A Consumptive Use Permit is required from SJRWMD. They will evaluate the
proposed volume of water being withdrawn from the lake and determine the
acceptable amount by permit. They will also look at the secondary effects of
reducing the water flow in Lake Jesup and the effects of withdrawal during low
seasonal flows.
We recommend a preliminary meeting with SJRWMD to discuss this report and the
future plans of the City. We need to develop a dialogue with the District and have
both parties work toward a positive goal of reducing groundwater demand and
increasing lower quality water for irrigation. We also recommend involvement of the
public at a very early stage in this process.
City of Winter Sorinas - Reclaimed Water Auamentation Study
Paae No. 7-1
SECTION 7
CONCLUSIONS AND RECOMMENDATIONS
7.0 Conclusions and Recommendations
The project is feasible and would provide the City with a secondary source of water.
The project would reduce groundwater withdrawals, thereby providing good potable
groundwater in the future. We recommend that the City pursue the following:
1) Discussion with SJRWMD on the project and coordination with "The Friends
of Lake Jesup".
2) Proceed with an application of a Consumptive Use Permit.
3) Upon approval, proceed with pilot testing of the recommended treatment
options.
4) Proceed with a design with known data from pilot testing.
5) Proceed with design(s) to expand the reclaimed distribution system.
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PROPOSED SITE PLAN
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WINTER SPRINGS
REClAIMED AUGMENTATION STUDY
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FIGURE
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Dale: 00.13-2005
Job No.: W04111
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