They have also been building a dam of hundreds of sand bags around the bomb site to pump water out in preparation for the delicate task of defusing the device.
Keynote has been conducting a public service study of how the major tax preparation sites, including the IRS site, are performing during their busiest season.
Operations ended at Oakley in December 2011 and since then the remaining buildings have been decommissioned in preparation for the eventual sale of the site for residential development.
Phoenix spent its first full day in the Martian arctic plains checking its instruments in preparation for an ambitious digging mission to study whether the site could have once been habitable.