问 What is being dumped into the drainage system?
答 Concrete bags and large dense clay mud

问 Where is the substance being dumped?
答 Storm Sewer

问 Do you know the responsible party that's dumping?
答 Yes

问 If yes, give name and any contact information.
答 The contractors who recently erected the connecting and neighboring buildings. Their debris is covering or clogging the drain. Their neglect is the violation

问 Is the dumping still in progress?
答 No