The project involves the addition of a small orthophosphate storage tank and chemical feed pump to add orthophosphate to the drinking water supply at several well sites. The chemical feed pump and small storage tank sit within the existing well facilities, generally on an existing concrete slab.
The City will begin utilizing treated Sacramento River water as primary water supply in June 2016. The new water supply naturally has a lower PH and higher oxygen content which would increase corrosion potential in the older water distribution mains. Orthophosphate is a corrosion inhibitor which will prevent corrosion of the older water mains. Orthophosphate is a drinking water additive for corrosion control and is widely used in drinking water systems. Existing wells serve as a backup to the surface water supply and orthophosphate would need to be added at these wells to inhibit corrosion.
This is to advise that the City of Woodland has determined that the project is exempt from the California Environmental Quality Act.
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