The existing chlorination station at Manhattan Wellfield uses gaseous chlorine, and has limited water volume treatment capacity. The LA Dept of Water and Power is planning on upgrading to an on-site hypochlorite generation system. The new station will be designed to treat water volume up to 30 cubic ft per second, with a much lower concentration of chlorine. The building that will house the station will be similar in size to the existing Ammoniation Station, and be located as close to it as possible. The switch from gaseous chlorine to OSHG will benefit the surrounding community by eliminating the handling and use of gaseous chlorine.
Class 2 exemptions cover the replacement or reconstruction of existing structures and facilities where the new structure will be located on the same site as the structure replaced and will have substantially the same purpose and capacity as the structure replaced, including but not limited to: (c) Replacement or reconstruction of existing utility systems and/or facilities involving negligible or no expansion of capacity.