A Dayton landfill has been barred from discharging waste into the city’s system since being linked to clogged lines and the use of prohibited chemicals that made cleanup crews “very ill,” records show.

The city of Dayton has taken that action against Stony Hollow Landfill while it determines whether — as records indicate — the South Gettysburg Avenue site’s waste blocked sewer lines and contained a “questionably toxic” chemical that resulted in 10 city workers seeking medical attention from “significant odors.”

Dayton Water Department Director Michael Powell said the city is awaiting lab results on the chemicals in question and would not comment on the extent of the workers’ illnesses.