North Plumas Lake Water Treatment Plant

North Plumas Lake Water Treatment Plant

Construction and operation of a 12 mgd water treatment plant to provide treated water to urban land uses developing within the approved Plumas Lake Specific Plan area. The current water treatment plant receives water from Wells #29 and #30 and treats the well to remove manganese. The treated water is stored in a 2 million gallon (MG) reservoir and pumped into the water system as needed. Well #29 and #30 alternatively operate to maintain a water level in the reservoir. The reservoir inlet is submerged. Based on the methane sample results, it appears it may be possible to lower methane below its saturation level by making modifications to the reservoir inlet. The reservoir could be configured so that water would enter the reservoir, hit a splash plate, and fall onto the reservoir water level. A blower could be cut into the roof over the reservoir inlet to blow air over the reservoir inlet and splashing water. This process of aeration could remove methane to below its saturation level. The critical factors in removing methane through this process are the distance the water falls from the inlet to the reservoir level and wind velocity over the splashing water. Aeration modeling was performed based on the highest levels of methane in the water (well #30) and using different water fall distances and wind velocities.

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