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

K114
Bradenton - ASR Program
Project Type Cooperative Funding
AOR(s)
Water Supply
Basin(s) Manasota
Cooperator(s)
City of Bradenton
Project Manager ELLISON, DON
Task Manager(s)
Status Ongoing
Description
This project is to permit and construct up to three additional monitoring wells, and perform two additional cycle tests at
the City of Bradenton's Downtown aquifer storage and recovery (ASR) site. The project is a continuation of the City's
Downtown ASR project that is located at the High Service Pump Station (HSPS) in Downtown Bradenton and will
provide 1.5 mgd of potable water during the 100-day dry season. The wells will be constructed to address FDEP
monitoring requirements for sites mobilizing arsenic in the subsurface. These wells are estimated to be about 550 feet
deep and completed into the aquifer storage zone, and will be located within several hundred feet of the ASR well. The
wells are being required by the FDEP. Funding requested for the project includes engineering fees for the required
Area of Review analysis, an update to the Well Inventory, and additional storage zone monitoring wells required by
FDEP. Funding is also being requested to modify FDEP permit No.133098-074-UC/MN for construction of the
additional monitoring wells; for the design, bid, award, construction and testing of up to three additional monitoring
wells; and for the extension of Cycle Testing to include Cycles 7 and 8.
Benefits
This project is expected to provide 1.5 mgd potable supply during a typical 100 day dry season which is needed to help
the city provide a more reliable source of water during periods of low flow in Braden River. The information from this
project will also support the Districts efforts to find methods to minimize arsenic mobilization in the aquifer during ASR
activities.
Costs
The total cost for all prior and ongoing project work is $2,684,250 ($1,342,125 each) and is contained in two separate
contracts. The first contract was completed in October 2005 and covered the construction and testing of an ASR well
and monitoring well for a total amount of $1,625,000 ($812,500 each). The second contract was initiated in FY 2007
and covers the construction of up to three new monitoring wells and continuation of cycle testing through FY2010 for a
total amount of $1,059,250 ($529,625 each). With the allocation of $101,650 from the Water Protection Sustainability
Trust Fund Program, the City's and District's equal shares of the second contract have been reduced to $478,800
each. The District's budget as it appears below does not reflect the $655,000 that was funded in FY2000 and prior
years, nor the $529,625 that was transferred into the project in FY2006 from project L513, the City's reservoir ASR
site.
Additional Information
The existing ASR well (1.5 mgd injection/recovery capacity) and piping was constructed in 2003 with cooperative
funding from the District. The City has completed 6 cycle tests as required by Florida Department of Environmental
Protection (FDEP) permit No.133098-074-UC/MN. Cycle test results have identified arsenic mobilization in the
subsurface and further plans for cycle testing is on hold until a new approach to control the arsenic mobilization
problem within acceptable Drinking Water Standards is developed. Continuation of cycles tests 7 and 8 is on hold until
the City identifies an acceptable approach, the additional monitoring wells at this point are to identify the extent of
arsenic contamination in the aquifer. The City has one storage zone monitoring well offsite with arsenic exceeding the
Drinking Water Standard of 10 ppb.
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