Top Guard Truncated Domes for FDOT E7J96 in Treasure Island (Pinellas County) June 22, 2015 Posted by on June 22, 2015June 6, 2017 Top Guard yellow detectable warnings installed +/-805 sq.ft. along Gulf Blvd in Treasure Island (Pinellas County). FDOT contract E7J96. Ajax as prime.