The workers will not even be allowed on the site until further environmental studies are completed, due to the presence of arsenic.

"Now that they have determined that there is a certain level of risk access," Mandryk said, the site "is going to be limited to trained personnel.

Construction officials said the length of the delay will be determined by the amount of time it takes before construction workers can get back onto the site.

"It depends on...how long it takes them to work through the site and recover everything that was found," Lichten said."

Though the setback is worrying College officials, Lichten says he's excited about the artifacts.

"It's actually an interesting find," he added. "I just wish it wasn't something that stops the work."