The bottom line on this whole scenario lies with whoever approved it when it first started.
What did they approve? use of the buildings?, use of the area?, what was the approval criteria? - were drainage and seepage considered? Was emergency containment considered? what emergency plans are in place?, Is there adequate fire suppression systems in place?, are they working to ISO environmental standards? What are the procedures for receiving and documenting incoming materials? What is the procedure for segregation of materials?, What are the procedures for final disposal?, records for final disposal?, who approves the final disposal?
Someone initially gave the approval for this company to operate, they are the ones that need to be held accountable.