Cooling Tower Blowdown Treated to Reach New NPDES Permit Levels
A utilities company in Texas discharged their cooling tower blowdown to a surface water source. New NPDES permit levels were enacted and the discharge now contained copper levels in excess of the new limit. The copper is believed to have come from the makeup water source as well as leaching from the cooling system. The new permit requirements called for a substantially lower limit of 53 ppb copper.
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