In recent years, debris and human remains have been discovered in various spots around Lower Manhattan.
In the past few weeks, the Office of the Chief Medical Examiner has been sifting through 590 cubic yards of construction debris from around the World Trade Center collected as recently as 2011.
Close to 100 pieces of potential human remains have been found since the new sifting operation began.
The medical examiner will now try to identify these remains using DNA. About 60 percent of the more than 2,700 victims have had remains identified.
Some victim's family members are hopeful that this new pile of construction debris will contain the match they still wait for.
"It'll be difficult. All the emotions, all the thoughts come rushing back to you. It would be a relief to know that these sacred remains are no longer sitting in a landfill somewhere," said Michael Burke who lost his brother, Fire Department Captain William Burke, Jr.
Yet not all family members are anxiously waiting for the phone to ring.
"I really didn't want to find anything out, anything after a certain point in time because it would only be rehashing things all over again." said Paulette Hasson who lost her son Joseph, an employ of the firm Cantor Fitzgerald. "He's in a good place I'm sure and some day I'll see him and I just feel like this is not something that I want to deal with right now. I don't feel that it will do anything for me if they find a bone fragment."
The total number of victims whose remains have been identified stands at 1,635, according to the Medical Examiner's office.