NEW WINDSOR — A property where electronic components used to be manufactured on Walsh Avenue has been added to the state’s Superfund list of inactive hazardous waste sites, according to the state Department of Environmental Conservation.

The site at 251 Walsh Ave. is about 1,000 feet south of Quassaick Creek, and water draining from the site runs downhill toward the creek. The creek flows into the Hudson River, about two miles to the east.

The site was used to manufacture electronic components from the 1940s to the 1970s, by a company the DEC did not identify.

Among the chemicals that are still in the groundwater and soil vapor are several used in the degreasing of metal and others suspected of causing cancer. Lead also is present on the site.

The chemicals were stored in a shed at the rear of the property, which is no longer there, and its exact location is unknown, the DEC said.

In addition to groundwater contamination, there also is a possibility vapor from the soil could enter the building, the DEC said.

The only current tenant is Chosin Few Leathernecks, a 501(c)(3) nonprofit that assists Marines and their families.

Andy Devlin, the president of the organization, said they were not previously aware of the situation, and he wasn’t sure his members would want to stay.

“I’m just blown away they are even allowed to have anyone in there,” Devlin said,

The site is currently owned by the AWMB Estates Limited Liability Company, and managed for them by Colonial Property Management.

Attempts to reach the owners through the property management company were unsuccessful Thursday.

A voluntary cleanup of the site was considered in 1997, but the owner at the time did not complete the required work, the DEC said.

Before further action can be taken, more investigation is needed to define the nature and extent of on- and off-site contamination, the DEC said.