An investigation found that an independent waste hauler had previously taken drums of toxic liquid from one of the companies and deposited them at a former chicken farm, sometimes pouring out the contents.
Suatu penyelidikan mendapati bahwa pengangkut - limbah sewaan sebelumnya telah mengangkut drum - drum cairan beracun dari salah satu perusahaan dan menyimpannya di bekas peternakan ayam, kadang - kadang menuangkan isinya ke luar.