Explanation
1. Background: This legislation authorizes the Director of Public Utilities to enter into an engineering agreement with Varo Engineers, Inc. for the Williams Rd/Castle Rd. Sanitary Pump Station Control Valve Upgrade Project. The City desires to replace the existing sanitary pump discharge control valves because the manufacture has discontinued all field support of the currently installed system. Newer technology installed at the City sewerage treatment plants has made the current system obsolete and the new systems are more reliable and easier to maintain and trouble shoot. The consultant shall prepare a report for the City containing cost estimates to replace these valves. Upon successful review of the report, the consultant will then prepare construction documents and plans to replace the discharge control valves at this station.
An ‘Arc Flash Hazard Analysis Study’ was performed by Lewellyn Technology of all City pump stations and it was found that this station has many arc flash hazards that may be corrected/reduced by installation of a faster acting fuse or other device(s) to reduce the arc flash hazard. The City wishes to reduce all ‘Dangerous!’ categories for this station to a category 2 rating and investigate the merits of reducing category 3 and 4 ratings to a category 2 rating level. The consultant shall confirm the results from this previous study and prepare a report for the City containing cost estimates to mitigate these rating categories. Upon successful review of the report, the consultant will then prepare construction documents and plans to reduce the ‘as authorized’ arc flash hazards at this station. At the conclusion of the construction improvements, the consultant shall provide an updated ‘Arc Flash Hazard Analysis’ for this station.
Currently the existing SCADA system at this station provides only monitored results from key flow levels and operational parameters back to the Sewer Maintenance Operations Center. The City...
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