1999-08-23_HYDROLOGY - M1999051 - Laserfiche WebLink

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Unusual flow and pressure data will be alarmed at the operator station. All alarms will be investigated immediately. In the case of unexplained losses of solution pressure or changes in flow indicating a possible leak, the well will be shut in until the situation is understood and corrected. Injection and recovery flow will be sampled and assayed for bicarbonate, carbonate, salt, and specific gravity at least 5 days per week. In addition to the automatic well head injection and recovery monitoring instruments there will also be provided a sample point, a manual 5 percent accuracy pressure gage, and a standard Y2 inch male threaded pressure gage attachment point. 4.0 Wellfield Piping Injection and recovery pressure and flow rate at the plant will be automatically monitored and compared to the companion data at the well head(s). Alarms will automatically indicate changes in recovery and flow rate which could indicate potential leaks in the wellfield piping system. If the event proves to be a leak, the process will be shutdown until the leak is controlled and the cause corrected. In addition to the automatic alarms initiated by changes in recovery and flow rates, a series of surveillance cameras, with monitors in the operator control room, will be mounted to observe the wellfield piping system and the well heads to show substantive leaks. Because of the hot water in the system, steam from leaks is anticipated to be readily visible to the operators. 5.0 Secondary Containment Gravity drainage to a collection and recycle facility is provided for wellfield piping and the production well pads. The plant piping and vessels are within a concrete - curbed basin system to collect and recycle spills and ruptures. Outside the plant piping and vessel basin system, a stormwater basin system will generally provide an additional spill containment barrier before solutions could exit the plant site and contact topsoil or native plants.