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I MOK 106 PAGE o"4 BACKGROUND In July 1997, construction was completed on a wastewater transmission main to allow the Sea Oaks Wastewater Treatment Facility to be taken out of service. In January 1998, a connection between the North County and the Central Regional Wastewater Treatment Facilities was completed. The County is currently in the process of expanding the Central Regional Wastewater Treatment Facility. The connection between the two facilities was constructed to allow excess flow from North County, which now receives flow from the barrier island to be transferred to the Central Regional Facility, deferring the expansion of the North County Facility to approximately the year 2005. Increasing flow on the barrier island and in the North County service area has created a potential deficiency in capacity and delays in the construction of the Central Regional expansion has delayed the transfer of excess flow as planned. ANALYSIS Staff has evaluated two altematives to help solve the capacity issue. The following alternatives are being considered: 1. Temporarily restart the Sea Oaks Wastewater Treatment Facility for use as necessary. The estimated recommissioning costs are approximately $6,000, plus a permit fee of $3,000 for a total cost of $9,000. 2. Construct an additional clarifier at the North County Facility. The estimated costs are $600,000 - $800,000. Staff has concluded that to accommodate the upcoming season, Option No. 1 is the most expeditious alternative. Additional evaluation will be performed by staff in an ongoing manner to determine if the Sea Oaks restart will provide the needed interim capacity. The Sea Oaks Homeowners Association and management have been involved in the evaluation process and have no objection to the restart of the facility on a temporary basis. The Sea Oaks community will receive benefit of a reinstated reuse supply, reducing reliance on onsite water resources. The additional months of Sea Oaks operation dedicated to this capacity relief measure. It is those budgeted will be brought to the Board approval. RECOMMENDATION may result in operational costs expected that any costs above of County Commissioners for The staff of the Department of Utility Services asks that the Board of County Commissioners concur with the Sea Oaks Wastewater Treatment Facility start- up as presented and requests authorization to expend limited budgeted funds to achieve this objective. August 25, 1998 50