Failing septic systems can cause hydraulic fractures and water contamination. In order to address this issue on South Kent Island (SKI) in Queen Anne’s County, sewer lines are being extended to replace aging septic systems. The $34 million project to connect 1,518 existing homes and eight commercial properties to Queen Anne’s County’s public sewer system. The project will be implemented in four phases over a 10-year period.
The County’s initiative to provide public sewer will overcome the site limitations of the region by segregating the sewage effluent from the high groundwater. The plan will also provide superior treatment of the effluent at the existing Kent Narrows / Stevensville / Grasonville (KNSG) wastewater treatment plant by eliminating pathogens as well as reducing nitrogen loads.
The Maryland Department of the Environment (MDE) estimates that 30,400 pounds per year of nitrogen are currently being discharged into the Chesapeake Bay from the SKI service area. After connection to the KN/S/G wastewater treatment, MDE estimates that 13,100 pounds per year of nitrogen will be discharged from the SKI service area. This is a reduction of 17,300 pounds per year of nitrogen, which far exceeds the nitrogen reduction from alternative on-site sewage disposal systems. This reduction in nitrogen loads will also help the County reach about 33 percent of its septic system goal for the Chesapeake Bay Watershed Implementation Plan.
Estimated project costs were reduced significantly through the use of the septic tank effluent pumping (STEP) system that limits transmission of effluent to greywater. This technology eliminated the need for intermediate pumping stations and minimized sources for inflow and infiltration.
The Queen Anne’s County Department of Public Works on Tuesday released a September progress report.
According to the report:
Contractor installed 19 tanks for the month. That brings the total tanks installed, as of 9-30-17, to 142. That equals about 23% of the contract amount paid to date with 21% of the contract time used. The contractor will be installing tanks on Utah next week. The contractor has indicated that they will be mobilizing an additional crew to start installing tanks. They will also be working on installing electrical disconnects on some of the sites that already have tanks installed. They will be contacting the homeowners of those sites before working on the outside electrical meters. County staff has received 588 easements to date. This is about 76% of all easements required.
Contractor installed about 1500 lf of pipe by the open cut method this month. They have also installed 10 clean-outs for the month and connected several drill shots to open-cut pipes. This equates to about 67% of the contract paid out with 41% of the contract time used. Contractor will finish installing pipe in phase “C” and move to phase “B” to finish connection there.
Contractor installed about 1050 lf of pipe by the open cut method this month. That makes about 76% of the contract paid out with 41% of the contract time used. This pipe is filling in some areas that were skipped over due to the extremely wet conditions at the time they were first there. It is also connecting some drill shots together. Contractor will continue filling in these gaps heading south along RT 8 from Baltimore.