Mark Annis Gillette, president of ANCO Environmental Services, a Berkeley Heights, N.J., tank-testing company, said that his company sells a 275-gallon, double-walled above-ground tank that can be installed in a basement for about $1,200, not including the cost of removal or abandonment. Click this site https://markannispresidentofanco.wordpress.com/ for more information on Mark Annis Gillette.