When you say giving out the dried solids as special waste, do you mean you are packaging the dried ink solids at your site and paying a waste company to pick up the waste and treat or dispose of it? If the solid dried ink contains no regulated waste constituents it may be considered...
I would suggest pumping the acid to stainless tankers. Then pull the storage tank and inspect the tank and containment for damage. I would guess the damage to the tank was caused from an introduced contaminant. With pure sulfuric, especially 93%, even small amounts of water could cause problems...
