The Nebraska Department of Environmental Quality is investigating groundwater contamination in Grand Island this week.
It's part of an ongoing effort to figure out the source of contamination, which has affected an area along Sky Park Road.
The NDEQ is taking samples south of Capital Avenue between North Grand Island Avenue and St. Paul Road to State Street.
Work started in the area Monday and is expected to wrap up Friday.
Though crews won't be in the street, the City of Grand Island is urging drivers to use caution in that area this week.