MANASOTA & PEACE RIVER BBDs Meeting Notebook 10-21-09.docx

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North Port - Water ASR - Phase V
Project Type Cooperative Funding
AOR(s)
Water Supply
Basin(s) Manasota
Cooperator(s)
Project Manager KELLEY, MIKE
Task Manager(s)
Status Ongoing
City of North Port, City of North Port - Public Utilities
Description
This project consists of an Aquifer Storage and Recovery (ASR) Program in the City of North Port to create an
alternative water supply by treating excess wet season flows from Myakkahatchee Creek and storing it in the
mineralized Floridan aquifer. The location is downtown North Port at the water treatment plant. The goal of the project
is to develop a 1.5 million gallon per day dry season supply. FY2008 funding is for Phase V of the project which is for
the installation and testing of a degasification system and for the injection and recovery of treated water, cycle test 4.
Longer duration cycle tests will follow. These cycle tests should determine the effectiveness of removing dissolved
oxygen from injected water on arsenic mobilization in the aquifer and recovered water. Phase V will finish this project.
Benefits
The goal of this ASR project is to develop a 1.5 million gallons per day (mgd) dry season supply (equivalent to an
annual average of 410,000 mgd). ASR is an effective method of optimizing the supply of water available from the
Myakkahatchee Creek. Combined with the City's allocation from the Peace River/Manasota Regional Water Supply
Authority (PR/MRWSA), this ASR project has the potential to enable the City of North Port to meet its needs until
approximately 2014.
Costs
The FY2010 funding request for $60,000 is to continue FDEP required sampling and testing of water quality in the
monitor wells through 2009 and 2010 while this project is on stand by. This project will continue when we have
favorable, recovery water quality results from the cycle testing at the Bradenton ASR site. The estimated total cost to
conduct Phase V of the project is $619,000 and will be shared by the Manasota Basin Board and the City of North Port
on a 50/50 cost-share basis ($309,500 each). The Basin's contribution will be provided as follows: $75,000 previously
approved in the Basin's FY2007 budget; $126,000 that is in the FY2008 budget; and the remaining $108,500 is in the
FY2009 and future budget years. Funding for FY2009 is combined with approved funding for FY2008 to expand Phase
V of the project to monitor and finish cycle test 4, and run additional longer cycle tests at the City's ASR site. The total
cost of the project is approximately $2,000,000 including prior phases I-IV and funding through FY2010. The Manasota
Basin Board and the City of North Port each contributed about $1,000,000.
Additional Information
Phase I determined ASR was the most effective method of optimizing the supply of water available from North Port
Utility's only local source, the Myakkahatchee Creek. The objective of Phase I was to determine the feasibility of ASR
at the North Port water treatment facility, and compare its merits and disadvantages with those of other forms of water
storage, primarily aboveground facilities. During Phase II, the City's consultant designed the ASR well system and
acquired construction and water use permits from the FDEP and the District. They also applied for a Class V injection
well permit from the FDEP. Phase III included construction and testing of the ASR well and monitor wells, and project
report writing. Phase III was initiated July 2001 and is complete. Line item adjustments have been made to Phase III to
change the focus of this ASR project from treated raw water to fully treated potable water ASR. Cycle tests one and
two were included in Phase III. Phase IV of the City's pilot ASR Program includes engineering services, hydrogeologic
field work, data collection and analysis, laboratory analytical services and completion report to accommodate the third
cycle test as required by the FDEP UIC permit for the project. The third cycle test was not included, as it was not
anticipated to be required by the FDEP at the time the Phase III agreement was finalized. The Phase III agreement is
being extended to 12/31/2005 to allow sufficient time to complete all activities related to finalization of the second cycle
test. Completion of the cycle test was hampered for a couple of reasons. First, the start of the injection portion of the
test was delayed due to a lack of water when the city was providing emergency water supplies to the PR/MRWSA
after Hurricane Charley hit the area in August 2004. The second major reason was the fact that the recovery portion of
the test was halted prematurely when the recovered water, which was directly discharged into Myakkahatchee Creek,
exceeded the standard for arsenic concentration of 50 micrograms/liter (ug/L). The DEP was contacted and the
second cycle test is considered complete. A third cycle test began 8/2/2005 and injected a million gallons per day of
treated water for 75 days which was to remain in storage 30 days. Recovery is delayed due to the construction of a lift
station to pump recovered water to the wastewater treatment plant because initial recovered water is anticipated to
exceed the 50 ug/L arsenic limit. When recovered water quality is below 50 ug/L arsenic the discharge will be to
Myakkahatchee Creek. The recovered water during Cycle Test 3 was all discharged into the sanitary sewer system.
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