A study of copper corrosion control strategies
- Progressive Consulting Engineers, Inc., Minneapolis, MN (United States)
- Brainerd Public Utilities, MN (United States)
In compliance with the Lead and Copper Rule of the 1986 Safe Drinking Water Act, Brainerd Public Utilities tested the first drawn water from 60 sampling sites within the city. Ninety percent of these site samples contained elevated copper levels in excess of the 1.3 mg/L (1,300 ppb) action level established by the EPA standard. The samples, however, did not exceed the 0.015 mg/L (15 ppb) action level for lead. A water quality study evaluated the various options for copper corrosion control using a test stand for approximately five months starting in May 1993. The study evaluated the effectiveness of applying various chemicals for the control of copper corrosion. Chemicals tested included sodium hydroxide (NaOH) (for pH adjustment); sodium silicate; ortho/polyphosphate (Calgon C-4). The study also examined the possibility of reducing the level of dissolved oxygen in the water during aeration as a means of reducing the level of copper corrosion.
- OSTI ID:
- 37364
- Journal Information:
- Public Works, Journal Name: Public Works Journal Issue: 11 Vol. 125; ISSN PUWOAH; ISSN 0033-3840
- Country of Publication:
- United States
- Language:
- English
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