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In a statement, Tracy said he has met with state and local public health officials about the accidental introduction of a solution containing sodium nitrate into the hot water system at McKinley School on Oct. 31.
The school was closed to students on Tuesday and Wednesday after the water problem was discovered.
About one gallon of the sodium nitrite solution — diluted to about 40 percent to 50 percent — was introduced into the school’s hot water system, he said. The sodium nitrite was further diluted by the many gallons of water contained in the hot water system.
Based on an assessment by the Aquarion Water Co., it is likely there was no “intermixing” between the hot and cold water systems.
The school’s drinking fountains are served exclusively by the cold water system, so it is very unlikely that anyone would have ingested any sodium nitrate during the 90-minute period between the introduction of the contaminant into the hot water system and the action to shut down the school’s water supply, Tracy said.
If anyone did drink hot water during that period, they would probably have experienced gastrointestinal symptoms immediately, he said.
"Anyone who believes they may have ingested hot water at the school on Monday afternoon and is experiencing gastrointestinal distress should consult their doctor. I am advised that, even in such cases, there would be no long term or chronic effects," he said.
If anyone was exposed to the contaminant through hand washing, Dr. Gary Ginsberg, toxicologist at the Connecticut Department of Public Health, said the potential risk would be for immediate skin and/or eye irritation. Again, there would be no long-term or chronic effects.
Bottom line, according to the Connecticut Department of Public Health: “Based on the likelihood that there was no oral ingestion or substantial dermal exposure to nitrite in the affected hot water supply, to our knowledge, students and staff did not receive an exposure of public health concern … Going forward, we do not expect any further health consequences from this contamination event.”
Tracy said he will make a decision regarding the reopening of McKinley School late Wednesday afternoon after receiving the results of the water testing conducted by an independent laboratory.
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