City of Sandusky Water Treatment Plant Rehabilitation Project
Mosser started the Ferrous Chloride System Rehabilitation project at the City of Sandusky Water Treatment Plant in September, 2020. Serving as the general contractor, Mosser has worked with the City of Sandusky since the preconstruction phase to navigate unique design plans to keep the project on schedule.
The following are a sequence of items the team has accomplished since the project kickoff:
November 2020
The team completed the installation of all buried cold water, hot water, and hot water recirculation lines. The lines span from the primary pump building to the sludge building. The schedule allowed for backfill and asphalt repaving prior to the asphalt plants closing down for winter. The team also installed the new FRP stairs, platforms, and grating in the containment structure.
January 2021
In January, the existing concrete equipment pad in the basement of the Aeration Control Building was extended. This allowed installation of the new larger dual ferrous chloride metering pump skid. Mosser’s subcontractors completed the feed panel build and roughed-in a majority of the new conduit and wiring.
February 2021
Mosser tied the aeration control building's existing ferrous chloride piping into the new underground buried double containment piping. This tie in allows staff to apply a more accurate dose of ferrous chloride earlier in the treatment process. The plant will run more efficiently and meet levels required by the United States Environmental Protection Agency (EPA). Mosser also received and set the two new 8,700 gallon ferrous chloride storage tanks within the containment structure.
There were a few obstacles throughout the duration of the project. For example, the team planned to tap into an existing domestic cold water line that was shown on the drawings, but the line did not actually exist. Mosser was able to pull cold water from the Primary Pump and utilize a trench that was already dug in order to install a domestic hot water line. Mosser overcame this obstacle because it was caught early enough to make the necessary adjustments without jeopardizing the project schedule.
The City of Sandusky awarded Mosser additional upkeep items, including installing a buried gas line and repairing an air line that had been leaking for a number of years. By already being onsite, Mosser was able to complete these additional projects at the owner’s request while saving them money by eliminating mobilization costs.
The team is on schedule to complete the remainder of the work by April 2021.
November 2020
The team completed the installation of all buried cold water, hot water, and hot water recirculation lines. The lines span from the primary pump building to the sludge building. The schedule allowed for backfill and asphalt repaving prior to the asphalt plants closing down for winter. The team also installed the new FRP stairs, platforms, and grating in the containment structure.
December 2020
A PVC drainage line was installed from the new containment structure to the scum building. The team installed a majority of the new ferrous chloride process piping throughout the scum building. All sidewalks throughout the site were poured during this time.
January 2021
In January, the existing concrete equipment pad in the basement of the Aeration Control Building was extended. This allowed installation of the new larger dual ferrous chloride metering pump skid. Mosser’s subcontractors completed the feed panel build and roughed-in a majority of the new conduit and wiring.
February 2021
Mosser tied the aeration control building's existing ferrous chloride piping into the new underground buried double containment piping. This tie in allows staff to apply a more accurate dose of ferrous chloride earlier in the treatment process. The plant will run more efficiently and meet levels required by the United States Environmental Protection Agency (EPA). Mosser also received and set the two new 8,700 gallon ferrous chloride storage tanks within the containment structure.
For the remainder of the month, the team will complete all of the process piping in the containment structure and tie the new ferrous chloride storage tanks into the treatment system. The ferrous chloride metering pump skids will also be installed. Electricians will complete final wiring connections, install heat trace on all exposed exterior tempered water piping, and install new level sensors on the storage tanks. The experienced plumbing subcontractor will finish insulating all of the new water lines. The skilled integration/controls subcontractor will complete all integration of the new instrumentation and relay the new signals into the plant’s existing SCADA system.
In the spring, the painting subcontractor will complete all of the required painting of the new process piping. Mosser will then wrap up the project by completing final site grading, seeding, and any remaining details.
There were a few obstacles throughout the duration of the project. For example, the team planned to tap into an existing domestic cold water line that was shown on the drawings, but the line did not actually exist. Mosser was able to pull cold water from the Primary Pump and utilize a trench that was already dug in order to install a domestic hot water line. Mosser overcame this obstacle because it was caught early enough to make the necessary adjustments without jeopardizing the project schedule.
The City of Sandusky awarded Mosser additional upkeep items, including installing a buried gas line and repairing an air line that had been leaking for a number of years. By already being onsite, Mosser was able to complete these additional projects at the owner’s request while saving them money by eliminating mobilization costs.
The team is on schedule to complete the remainder of the work by April 2021.