July 25, 2012 - Toho Water Authority

Major Project Summaries 07.25.12
Project Project Status Progress from Cost Schedule
Name Description Previous Report Estimate
DB
Harmony WTP
Miex
Installation
Project
DB
the existing Santaire package plant currently
utilized as a digester including removal of
failing interior walls and inefficient diffuser
heads. The project also includes the
relocation of blowers from Cypress West
WRF that are not in use. The digester is used
as a treatment train when one of the two
Sequencing Batch Reactors (each SBR is
rated for 75% of the 0.84 MGD plant
capacity) is offline for maintenance or repairs
as the plant is near capacity and one SBR
cannot sustain plant flow for extended
periods.
Design Engineer: CH2MHill
Contractor: To Be Determined
This project will install a magnetic ion
exchange system (MIEX) to remove
Dissolved Organic Compounds (DOC) from
the groundwater. The project is necessary to
meet an FDEP Consent Order to reduce
Disinfection By-Products (DBPs) in the
finished water. DBPs, which are formed
when DOCs react with free chlorine, are
regulated under the Safe Drinking Water Act.
As an added benefit, the MIEX system will
remove H 2 S; improve smell, taste, and color;
and reduce chlorine demand.
existing Sanitaire Plant will
was to be rehabilitated to
operate as a Sequencing
Batch Reactor (SBR);
however, the anticipated cost
is higher than expected so
the digester will be rehabbed
as is.
Design is underway.
On June 13, 2012 the Board
of Supervisors approved an
addendum with CH2M Hill for
the design, permitting,
bidding and construction
administration services for
the Miex system installation.
On June 15, 2012 the Board
approved staff to proceed
with the design and
installation of a 300 GPM
MIEX unit.
June, 2012 and reviewed by
operations and engineering
staff. Minor revisions are
required and will be complete
by the end of July. The
project will be bid to CMARs
currently under contract with
Toho.
Negotiations are underway
with Orica (manufacturer of
MIEX) for the Owner Direct
Purchase (ODP) of the MIEX
Water Treatment System,
which is a long lead item
(approximately 28 - 32 weeks
for design and fabrication).
The ODP is necessary to
ensure the consent order
schedule is met.
Engineer’s Estimated
Cost of Construction:
$1,300,000
subcontractors bidding
in August. A 6-month
construction period is
estimated.
Design to be complete
by the end of
November 2012, with
construction beginning
in January 2013. The
project is anticipated to
be complete by the
FDEP Consent Order
deadline of April 2013.
South
Bermuda WRF
Central
Electrical
Building
Engineer: AECOM.
CMAR: Wharton-Smith.
This project will provide a centralized and
reliable backup power supply to serve the
entire South Bermuda Water Reclamation
Facility (SBWRF). The existing power backup
system at SBWRF consists of remote
generators dedicated to individual plant
processes. Some of the existing generators
do not have sufficient capacity to supply
power as the processes have been
expanded during previous projects. SBWRF
is a public access reuse facility; therefore
FDEP requires Class 1 reliability for the
electrical system. Class 1 reliability requires
that no single fault or power failure would
disrupt operation of multiple motor control
The central electrical building
and generator work is
substantially complete. The
system is currently in service.
Installation of the lab electric
feeder is 20% complete.
3
The open cut portion of the
electrical conduit is 50%
complete. The directional
bore portion of the conduit
installation is 30% complete.
Once the entire conduit is
installed and the equipment is
delivered, the conductor wires
will be pulled, and the
electrical equipment will be
installed. A 4 week delay is
expected for delivery of the
electrical equipment, due to
product availability and
manufacture lead times.
$462,486
(Engineering Design
& Construction Phase
Services Cost)
$87,660 (CMAR
Preconstruction
Services)
$1,323,333 (Owner
Direct Purchase of
Generators, Fuel
Tanks, Switchgear,
etc.)
$40,175 (Permitting
Fees, by Toho)
Construction
August 2011.
initiated
Substantial Completion
issued June 2012.
Final Completion
(including lab electrical
feeder) scheduled for
September 2012.