City of Lathrop Water Supply Wells Arsenic Reduction Facilities

City of Lathrop Water Supply Wells Arsenic Reduction Facilities

The project is necessitated by recent updated arsenic regulations adopted by the US Environmental Protection Agency. Certain existing water supply wells in the Lathrop system exceed the standards established by the EPA regulations. The proposed project would divert water from City wells 6, 7, 8, 9, and 10 via new pipelines to a new centralized arsenic treatment plant. Treated water would be reintroduced to the City water system. The project involves the construction of approximately 2.3 miles of 12 to 24 inch pipeline along existing paved and unpaved roads, and industrial and agricultural lands adjacent to the Union Pacific Railroad. The proposed treatment plant would be located on an existing industrial site adjacent to and south of Louise Avenue and would occupy an approximately 3-acre area. The treatment plant would involve raw water blending; coagulation of arsenic using ferric chloride and sodium hypochlorite as well as sulfuric acid, if required. Treated water would be filtered, mixed and returned to the City water system. Solids will be subject to evaluation as part of the backwash system; solids will be subject to testing and will be disposed to an approved waste facility. The project would be constructed, owned and operated by the City of Lathrop Public Works Department.

Lathrop

San Joaquin