Thank you, Mr. Chair, for the question. I'll try to answer briefly.
When a pollution source is identified, it doesn't necessarily mean sampling will be required. For example, if there is a failure in a waste-water treatment system and our modelling indicates that the risk is great, we may immediately advise DFO that there is a risk and an emergency closure is required. It's not automatic that a source of pollution equals sampling; that process is determined based on the risk.
For sampling times, we have 30 hours from the time we take a sample to get it to the lab and analyze it within 24 hours, and we get the data after that.