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Known toxins show up in several wells near Lydall in Rochester

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ROCHESTER - The state Department of Environmental Services said recent test results of a residential well near Lydall Performance Chemicals, Inc., showed elevated concentrations of perfluorooctanoic acid, a known carcinogen; and perfluorooctane sulfonate, associated with chronic kidney disease.

A Friday press release noted the department began testing residential wells near Lydall after results of a groundwater well not used for drinking water and three samples from lagoons and/or effluent from the facility, obtained during a permit renewal inspection, showed elevated levels of PFCs.

As a result the company is now providing bottled water to one residence. The state is also offering to do tests for other nearby wells.

The New Hampshire Ambient Groundwater Quality Standard (AGQS) is 70 parts per trillion (ppt) for PFOA, PFOS, and for PFOA and PFOS combined.

The test results for the impacted property showed 88 ppt of PFOA and 140 ppt of PFOS, a combined 228 ppt.

Samples collected from the Lydall facility exhibited a combined concentration (PFOA and PFOS) of 443 ppt to 860 ppt.

Test results of nine additional drinking water and monitoring wells in the area exhibited combined concentrations of 2.6 ppt to 24 ppt, which are below the standard.

Perfluorooctanoic acid is used in the manufacture of Teflon, while perfluorooctane sulfonate is used in stain repellant materials.

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