Emergency officials have discovered another toxic gas leak in Norfolk County, Ont.

According to a news release, staff from the local Health Unit and Norfolk Fire and Rescue found the leak at a County-owned woodlot at 1925 Forestry Farm Road, northwest of the intersection of McDowall Road.

The county says a former gas well inside the forested area was leaking small amounts of Hydrogen Sulphide gas.

The gas — which is lethal and flammable at high concentrations and causes people to lose the ability to smell it — was also found at a natural gas well in an area between Silver Hill and Langton over the summer. Close to two dozen homes were evacuated as a result of that leak, but that order was lifted in mid-September.

Tests were conducted on the area near the Forestry Farm Road location, and found trace amounts of the gas at multiple locations – but readings were confined to a small area about 30 metres in diameter immediately adjacent to the well site, the county says.

"Sampling will continue over the next few days and staff, working closely with Provincial Ministry Officials, will meet early next week to discuss the most appropriate course of action," a news release from the county reads. "The public is being requested to avoid the area as a precautionary measure."

Emergency officials say they are "not immediately concerned" about exposure to residences or people travelling in the area.