By Liz Segrist lsegrist@scbiznews.com Published Oct. 20, 2014 From the Oct. 6 print issue of the Business Journal With the terminal renovation project about halfway completed at Charleston International Airport , construction crews have discovered more asbestos from the terminal’s construction in the 1980s and airport officials are trying to determine who is responsible. Recent test results confirmed that the mastic used as waterproofing in the exterior Concourse B stairwell walls has asbestos-containing material, Airports Director Sen. Paul Campbell said earlier this month.