The City of Exeter (City) operates a small, community drinking water system located in the disadvantaged community of Exeter in Tulare County, California. The system has 3,298 service connections, an average demand of approximately 1,738 acre-feet per year, six active wells, three inactive wells, and one active 100,000-gallon storage tank. The City is seeking to address the following issues:
• The City’s existing water storage capacity is insufficient during peak demand periods. Additional water storage and pumping facilities will be required to satisfy peak demands and future growth.
• Several wells are abandoned. The City would like to explore the possibility of rehabilitating abandoned wells to restore production capacity.
• The capacities of the existing wells have been declining over the years. The City wishes to conduct pump testing to determine the current capacities of each well.
• Elevated haloacetic acid, trihalomethane, and coliform levels have been occasionally observed throughout the distribution system. The City wishes to evaluate and design infrastructure improvements for mitigating exceedances.
• The City’s existing water system controls infrastructure is aging and requires extensive upgrades to facilitate long-term operation of water supply infrastructure.
• Several critical wells do not have auxiliary power to maintain production in the event of a power and/or engine failure of the existing well motors.
To address these issues, the following project components work will require planning and design:
• Increasing the water storage capacity from 100,000 to 500,000 gallons through design of a new storage tank and booster pump station.
• Increasing water supply capacity through potential rehabilitation of abandoned and active wells.
• Mitigation of occasional coliform, trihalomethanes, and haloacetic acid exceedances through evaluation and design of infrastructure improvements.
• Design of a new SCADA system with updated radio telemetry equipment to serve six (6) or more wells and associated storage tanks.
• Design of auxiliary/emergency power to four (4) existing wells.