July 25, 2012 - Toho Water Authority

CATEGORY:
Attachment(s):
Consent
None
APPROVAL FOR THE COLLECTION SYSTEM INFLOW ABATEMENT PROGRAM –
POINCIANA LAKE MARION WATER RECLAMATION FACILITY
Explanation: Inflow and Infiltration (I/I) is defined as rain and groundwater infiltration into the
gravity sewer system. I/I consumes hydraulic capacity in the collection system and treatment
capacity at the plants. A program to reduce excessive I/I will ensure that the designed
capacity of the collection system and reclamation facilities is available to transport and treat
wastewater.
An inflow abatement program was initiated in Poinciana’s Cypress West Water Reclamation
Facility’s (WRF) service area to reduce excessive inflow. The effectiveness of this program
has been validated by eight months of operating data showing that it has reduced the inflow of
rainwater into the collection system and reduced the impact inflow has on the Cypress West
WRF.
This project will address the rainwater inflow issues in the Lake Marion WRF service area by
applying the same techniques used for Cypress West WRF. An analysis was performed to
correlate the pump run times for all lift stations in the Lake Marion WRF service area to rainfall
levels. This analysis identified 16 lift station basins with evidence of I/I problems. This project
will address these areas by:
1. smoke testing over 318,879 feet of gravity sewer to identify the sources of inflow;
2. sealing 1,428 manhole chimneys to prevent the inflow of rainwater between the cone,
height adjustment rings and frame;
3. installing inflow dishes in 1,428 manholes to prevent inflow between the manhole cover and
frame;
4. replace all missing or damaged sewer cleanout caps (estimated to be 50% of all cleanouts
or 2,290).
A bid specification for this construction project was advertised on DemandStar and bids were
opened on June 26, 2012. Three bid packages were received and evaluated; USSI, LLC was
selected as the lowest qualified bidder with a bid of $594,526.47. The received bids are listed
below.
Bidder Name
Total Bid Value
USSI, LLC $594,526.47
GML Coatings, LLC $746,305.52
VacVision Environmental, LLC $850,173.80
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