Final answer:
Option C) Periodically flushing sinks and floor drains with clean water is not an effective wastewater control strategy because it doesn't remove contaminants, just dilutes them, which is not a proper prevention method.
Step-by-step explanation:
The correct answer to the question, which is about a factory's control system to prevent the release of wastewater that does not meet discharge standards, is C) Periodically flushing sinks and floor drains with a large volume of clean water to ensure pollutants are sufficiently diluted. This option is not a part of an effective control system because dilution does not actually remove the contaminants; instead, it only reduces their concentration, potentially spreading pollution rather than preventing it. Control measures should involve preventing pollutants from entering the water, treating wastewater to remove contaminants, and analytical monitoring to ensure compliance with standards before discharge.
Effective strategies include A) Establishing a preventive maintenance program for the pretreatment system to ensure it operates efficiently, B) Specifying which substances may be disposed of within the factory to avoid introducing harmful substances into the water, and D) Performing chemical analysis of the water before discharge to ensure that it meets environmental standards. These approaches align with wastewater treatment and environmental protection policies such as those established by the Clean Water Act, which sets water quality standards and regulates pollution.