Explanation
1. BACKGROUND
This ordinance authorizes the Director of Public Utilities to enter into a construction contract with Claypool Electric Inc. for the Southerly Waste Water Treatment Plant (SWWTP) Power System Upgrades and Safety Improvements project, CIP #650357-100101, in an amount up to $16,418,654.00; and to encumber funds with the Department of Public Service for prevailing wage services in an amount up to $2,000.00, for a total expenditure of up to $16,420,654.
The latest Power Study at Southerly Water Reclamation Plant noted several instances where the withstand rating, or total instantaneous current carrying capacity of the electrical equipment, was exceeded by the calculated available short circuit current. In addition, there were several locations where the system’s protective devices could not be selectively coordinated, and the calculated arc flash levels exceeded the personal protective equipment category of 2 that the City would prefer not exceed.
This project will provide improvements that include two new Low Voltage (14.4kV-480V) Unit Substations, two new 480V Motor Control Centers, Distribution Panels, and Circuit Breakers scattered throughout the entirety of the Southerly Water Reclamation Plants distribution system. Improvements will reorganize the plant distribution system in key areas to ensure selective coordination throughout the facility and replace critical aging gear such as the CPA Unit Substation which is responsible for all Primary Clarifiers. Primary Clarifiers play a crucial role in the wastewater treatment by separating solids from liquids, which is essential for preparing wastewater for biological treatment. The project will enhance the overall efficiency of the treatment process. Improvements will also include arc flash maintenance switches where appropriate to provide the safest possible working environment for plant staff. Areas with electrical improvements in this project are as follows:
1. East and Far Eas...
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