Cylindrical double-wall tanks from Assmann Corporation eliminate chemical spills without the expense of lined concrete containment. Assmann’s molding process provides uniform walls with a heavier-top sidewall and dome for excellent chemical and corrosion resistance, while the primary inner tank and a secondary locked-on outer containment ensures against chemical spills. Constructed of molded high-density crosslinked polyethylene or FDA compliant linear polyethylene, the double-wall tanks provide an outer shell containment that equals 120% of primary tank capacities. The dome on the inner tank interlocks with the outer tanks’ sidewall, sealing the secondary containment area and preventing debris from entering. The portable tanks provide a small footprint and are available in sizes ranging from 20 to 8,850 US gallons.