Storage
Oil and chemical waste must be stored in closed containers on a stable and impermeable base without any possibility for discharge into the sewer system. The storage site must be protected against precipitation and fitted with gradients, hollows or edging, so the "basin" can contain the total volume of the container in case of leakage or spills.
Municipalities are the relevant authority in connection with storage of waste, and they should be contacted if you have any questions.