Contaminant Control has been called to clean up the asbestos at the World Trade Center as well as anthrax spores at the Capitol and the Hamilton Post Office in New Jersey.
"We have been moving mail around the clock for eight days and we are not done," said Mark Vestal, president of Contaminant Control. "The better you're protected, the better you're going to be."
It is not cheap for the workers to protect themselves. Equipment for one person can cost up to $700.
"Everybody wants to be safe. We want to be safe for our employees," Vestal said.
Contaminant Control workers can spend up to 30 minutes in a de-contamination line, washing down with a chlorine solution and a water hose. It is their first stop after handling material possibly tainted with anthrax.
"There's always that concern in the back of your mind, especially what we're dealing with -- the anthrax," said worker Brian Brinson.
Besides anthrax, Contaminant Control also helps clean up oil and diesel spills as well as other hazardous materials across the country.