Interstate is full service storage tank and tower maintenance contractor providing services across the country to storage tank builders and tank owners with Cleaning, Coating, Cell Phone Telecommunication Attachments, Demolition, Frost-Free Stainless Steel Vent Caps, FAA Lighting, Foundation Repairs, Inspections, Major and Minor Steel Repairs and Steel Replacements, Man-Ways, Overflow Pipes, Riser Pipes, Safety Equipment, where our cost-effective yearly maintenance program and coating system warranty still remains unmatched by our competition.