RALEIGH — The N.C. Division of Waste Management will be drilling to begin below-ground tests Monday in Wake Forest where contaminated water has been detected in 14 residential wells.

The water tests have shown high levels of chemicals, but the additional testing is to determine if the chemicals have also contaminated vapors near the houses.

The Environmental Protection Agency, Division of Waste Management and Wake County Environmental Services sampled more than 100 residential wells in the Stony Hill area. Fourteen, all located on Stony Hill Road, had contaminants such as included trichloroethylene (TCE), perchloroethylene (PCE) above federal drinking water standards.

The homes were provided with bottled water immediately when the contaminated water was detected in their wells in July and August.

The EPA is funding water line extensions to supply the impacted homes with clean water. The two homes with the highest TCE levels were connected to community water lines on Oct. 11. Seven more homes will be connected during the week of Oct. 15. The other impacted residents will be connected to another water system early next year.

Results from next week’s testing are expected within two-to-three weeks after the sampling.