BV council hears details of revised agreement with Carroll-Boone

Friday, October 6, 2017

The memorandum of understanding (MOU) between Berryville and the Carroll-Boone Water District is being updated to clarify the corrosion control practices in the district.

Brad Hammond, a consulting engineer with McGoodwin, Williams & Yates, gave an informal presentation on the new MOU to the Berryville City Council on Tuesday since only Mayor Tim McKinney and alderwoman Cindy George were able to attend.

Hammond said there were a few reasons the MOU was being revised.

“One reason is the last MOU was signed almost 20 years ago in 1998, and there are some housekeeping things we should update,” he said. “The main reason was to clarify the corrosion control practices in the district and make sure that portion was up to date with current regulations.”

According to TheWaterTreatments.com, corrosion is a natural process in which materials, usually metals, are gradually destroyed by chemicals or electrochemical reactions within their environment.

He said Carroll-Boone is currently in the bidding phase of making some improvements to enhance its chemical feed system to increase the pH of the water, which will help corrosion control and help all customer cities deal with lead.

Hammond said the Arkansas Department of Health (ADH) required the city of Harrison and Carroll-Boone to have an MOU regarding corrosion control to make sure there was a document in place that required corrosion control parameters.

“So we decided it made a lot of sense to go ahead and put that in a revised MOU,” he said, “and do all the housekeeping stuff that needed to happen to make the MOU up to date.”

Hammond provided the council with a revised MOU so the aldermen could track what changes were made.

He said the last line of page 15 of the MOU previously read “the district shall produce a treated water, which will neither corrode nor scale the transmission liner and distribution systems of the user cities under the normal range of domestic operating conditions.”

Scaling occurs when water has high levels of minerals in it, which can build up on surfaces, according to TheWaterTreatments.com. The site says light scaling can be considered beneficial because the inside surfaces of metal pipes become coated with harmless minerals that act as a barrier to corrosion.

“Neither corroding nor scaling is difficult to achieve,” Hammond said. “You have to do a little bit of one or the other. The real intent of that was to make sure the district provided the highest quality water that was the least corrosive practically to assist with any lead issues.”

He said that language was struck from the MOU, and a new paragraph has been added that says the district shall adjust the pH of the treated water for corrosion control purposes in accordance with Environmental Protection Agency (EPA) standards that govern corrosion control.

“Really what we mean is this is a way for the district to further improve the water quality,” Hammond said, “and further help corrosion within the system.”

McKinney said he and George would get the information to the other council members.

“If any of them have questions and you need to be here, then we will let you know,” he said. “I think it’s pretty clear, and we appreciate you coming here to explain it.”

The council’s next regular meeting is scheduled for 6 p.m. Tuesday, Oct. 17, at City Hall.

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