Detailed description
Do you operate a facility that requires a permit under the Immission Control Act, for which you already have a permit under the Immission Control Act, and are you planning to make significant changes to this facility?
Significant changes are those that can cause adverse effects due to the change in location, condition or operation. If these are also significant for the approval requirements of facilities that require approval, you will need approval for them.
You also need a permit if the change or expansion of the operation of plants requiring a permit means that the performance limits or plant size specified in Annex 1 of the 4th BImSchV are reached. You must therefore have any significant changes to plants requiring a permit checked by the responsible authority.
If, in your opinion, the proposed change is not significant, you must notify the competent authority of the change.