This Nov. 25, 2013 photo shows certified industrial hygienist Gary Siebenschuh, left, and assistant Courtney Van Stolk preparing to enter a house that was once used as a clandestine methamphetamine lab in Memphis, Tenn. The house was placed under quarantine after a Nov. 6 fire that police said was caused by a meth lab that exploded in the attic of the house. Siebenschuh and Van Stolk were hired by the homeowner to test the home for meth residue. (AP Photo/Adrian Sainz).