FROM: James D. Herberg, General Manager
Originator: Lan C. Wiborg, Director of Environmental Services
SUBJECT:
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OCEAN MODELING SUPPORT PROJECT
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve Amendment extending the Agreement between the Orange County Sanitation District and Southern California Coastal Water Research Project regarding Ocean Outfall Plume Modeling, to provide physical and biogeochemical modeling of the Orange County Sanitation District's ocean discharge, at a cost not to exceed $135,000, for a total amount not to exceed $383,000;
B. Approve a contingency of 13,500 (10%); and
C. Approve an agreement performance period extension to December 31, 2024.
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BACKGROUND
Under its ocean discharge permit and the California Ocean Plan, Orange County Sanitation District (OC San) is required to conduct Strategic Process Studies (SPS) that address critical areas of interest to OC San and its regulators and the public. One example is the change in discharge effluent quality and quantity as a result of the final expansion of the Ground Water Replenishment System (GWRS). In November 2018, a professional services agreement was awarded to the Southern California Coastal Water Research Project (SCCWRP) to conduct high-resolution modeling of our discharge before and after GWRS. This work supports required monitoring under our existing permit and will provide insights to future monitoring needs under future permits.
The OC San agreement leveraged existing SCCWRP Ocean Acidification and Hypoxia (OAH) modeling work being conducted for the entire California coast. One of the initial conclusions of the OAH modeling effort was the need to better understand the time-based variability seen in modeling runs. After thorough internal discussions and consultation with SCCWRP staff, OC San staff concluded that it is essential to better understand the potential distribution of our effluent in the ocean...
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