FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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NEWPORT BEACH PUMP STATION PRESSURIZATION IMPROVEMENTS, PROJECT NO. 5-68
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Professional Design Services Agreement with Dudek to provide Engineering Services for Newport Beach Pump Station Pressurization Improvements, Project No. 5-68, for an amount not to exceed $542,988; and
B. Approve a contingency of $54,299 (10%).
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BACKGROUND
The Orange County Sanitation District (Sanitation District) operates seven pump stations in the City of Newport Beach which, together with the sewer trunk lines and force mains, convey flows to Plant No. 2. Air with significant concentrations of odorous, corrosive, and potentially hazardous gasses is also transported in the trunk lines. These pump stations were designed 15-50 years ago by different design consultants.
RELEVANT STANDARDS
* 12 or fewer odor complaints per year under normal operating conditions in the collections system
* Operate and maintain facilities to minimize impacts on surrounding communities, including odor, noise, and lighting
* Comply with Government Code Section 4526: Select the "best qualified firm" and "negotiate"
PROBLEM
The pump stations have inadequate venting, which can lead to the escape of odor and hazardous gasses. At the Lido Pump Station, the gasses contributed to equipment failure that led to a sewage spill. As an interim measure, staff has sealed all suspected leakage points, including bathroom facilities, but there is a continuing risk of gas leakage and hazardous gas buildup. In addition, more staff time is needed to monitor and address the buildup of hazardous gasses.
PROPOSED SOLUTION
Implement Newport Beach Pump Station Pressurization Improvements, Project No. 5-68, which will install a passive venting system at each pump station to relieve the buildup of pressure. T...
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