FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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OCEAN OUTFALL CONDITION ASSESSMENT AND SCOPING STUDY, PROJECT NO. PS18-09
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a Professional Services Agreement with Carollo Engineers, Inc. to provide engineering services for the Ocean Outfall Condition Assessment and Scoping Study, Project No. PS18-09, for an amount not to exceed $2,744,000; and
B. Approve a contingency of $274,400 (10%).
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BACKGROUND
Secondary effluent from both Plant Nos. 1 and 2 is either reclaimed through the Groundwater Replenish System or pumped five miles out to the ocean through a 120-inch diameter undersea ocean outfall pipeline from Plant No. 2. This ocean outfall has been in operation for nearly fifty years since its commissioning in 1971, and is vital to the mission of the Orange County Sanitation District (Sanitation District.)
Recently, an Integrity Assessment Report for the ocean outfall was completed in order to meet requirements of the lease agreement with the California State Lands Commission. The report was based on historical construction and inspection records as well as other documentation collected during prior inspections. This report included recommendations for future repairs, monitoring, and studies. The report concluded that while the overall structural integrity of the outfall appears to be suitable for continued use, additional inspection of the metallic components and the ballast is needed to determine the remaining useful life of the outfall.
RELEVANT STANDARDS
* 24/7/365 treatment plant reliability
* Comply with environmental permit requirements
* Maintain a proactive asset management program
PROBLEM
A detailed assessment of the ocean outfall's condition is needed to ensure that the outfall remains a viable and reliable asset. However, performing an assessment of the outfall is extremely ...
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