Final answer:
Proper disposal of liquid waste into the sanitary sewer typically involves meeting regulatory criteria, which can include dilution, half-life restrictions, quantity limitations, and record-keeping, but specific requirements vary by jurisdiction.
Step-by-step explanation:
The proper disposal of liquid waste into the sanitary sewer addresses a number of requirements, which vary depending on the type of waste. Typically, regulations require that hazardous materials, including radioactive substances, be handled with care to prevent environmental contamination and ensure public safety. When it comes to radioactive liquid waste, it often must meet certain criteria such as dilution, half-life restrictions, quantity limitations, and record-keeping. However, the four options provided (A, B, C, and D) do not fit universally accepted standards, as regulations can vary widely depending on the jurisdiction and the specific nature of the waste being disposed of. Therefore, it is essential to consult local regulations and guidelines provided by agencies such as the Environmental Protection Agency (EPA) or equivalent entities in other countries to determine the appropriate requirements for disposal.
Option D states that a logbook must be kept with date, isotope, and activity. Record-keeping is generally a standard practice required by regulatory bodies for tracking and ensuring compliance with the appropriate disposal procedures for hazardous materials. While options A, B, and C could be relevant under certain conditions, they are not universally applicable without additional context or reference to specific regulations that might mandate such requirements.