CX-006972: Categorical Exclusion Determination

285-H Cooling Tower Basin Well Water Makeup Supply BypassCX(s) Applied: B1.5Date: 09/16/2011Location(s): Aiken, South CarolinaOffice(s): Environmental Management, National Energy Technology Laboratory

Office of NEPA Policy and Compliance

September 16, 2011
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285-H Cooling Tower Basin Well Water Makeup Supply Bypass
CX(s) Applied: B1.5
Date: 09/16/2011
Location(s): Aiken, South Carolina
Office(s): Environmental Management, National Energy Technology Laboratory

Install bypass on makeup well water supply to cooling tower 285-11H per M-MT-H-07595. The location of the work is outdoors in the vicinity of, and adjacent to the 285-H basin and the 285-11H tower. This modification will not change the chemical or physical parameters of the water entering the 285-11H basin, nor will it change the ultimate destination of flush water or basin overflow. The only consequential change will be the chemical characteristics of the 285-H overflow. Due to the new bypass entering the western end of 285-11H, the makeup water will be mixed better than before, resulting in a pH near 7 by the time it overflows the south end of 285-H. The result will be greater pH stability of this water as it overflows to the H-12 Outfall.