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State admits Roane Central testing error

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Water in compliance with TDEC regulations

By Cindy Simpson

Roane Central Utility Board thought it was in noncompliance for a byproduct of disinfection of drinking water in the last quarter of 2016, but further review has shown it was not in violation.

Blaming it at first on an August sample, the total trihalomethanes was calculated at .082 milligrams per liter, which exceeds the maximum contaminant level of .080 milligrams per liter set for this parameter.

TDEC has noted they miscalculated, however.

In an email from a Tennessee Department of Environment and Conservation official, environmental specialist Wayne Muirhead said his calculations did not include the February 2016 samples.

“After correcting the Excel LRAA calculations, the fourth quarter LRAA samples are below 80 ppb at both monitoring sites and Roane Central U.D. was in compliance with the Stage 2 DBP Rule

for the 4th quarter,” Muirhead wrote to manager Bob Creswell.

Creswell said that they had taken two samples in August and one had been contaminated.

Instead of factoring in February’s tests, the calculations that showed they were in error included both August’s samples and Novembers but omitted those taken in February.

Muirhead apologized for the error in the email to Creswell and said he would be sending a letter rescinding the violation that had been mailed out in a letter dated Jan. 24.

Trihalomethanes are a byproduct of disinfection from chlorine or other disinfectants used in water to minimize the risk of microbial life in drinking water.

Creswell said he was told even at the maximum allowed a person would have to consume around 2 liters of water a day for 70 years to experience health problems.