You may also be able to get permission from your water or sewerage company to discharge it into the foul sewer.
If a spill enters the sewer, you must tell your water and sewerage company immediately.
You must get permission from your water and sewerage company before you discharge to their drainage system.
You must get a trade effluent consent from your water and sewerage company.
For discharges to the foul sewer you must have permission from your water and sewerage company.
For sewerage companies, it's more like public relations, spin control.
If your water and sewerage company refuses consent you can appeal against that decision.
Before using flocculent, contact your water and sewerage company to make sure that you can still discharge to the sewer.
Contact your local water and sewerage company about disposing of these materials to the foul sewer.
If contaminated water enters a sewer, tell your water and sewerage company immediately.