2 September 2018 Barrel Disposal Posted on September 2, 2018 by Durgan 2 September 2018 Barrel disposal.2 September 2018 Barrel disposal My US 50 gallon water barrels (5) need replacing,since they have rusted in spots and are leaking. No disposal facility will take them unless flattened. I use a reciprocating saw and cut off both ends and make a longitudinal cut to allow for flattening.