Final answer:
FAWPSS drums are intended for storing potable drinking water only to avoid contamination and ensure water safety for consumption.
Step-by-step explanation:
FAWPSS drums are specifically designed for carrying potable drinking water. Therefore, the correct answer to what is authorized to be filled into FAWPSS drums is A) Potable drinking water only. Due to the potential contamination risks associated with other substances, it is crucial that these drums are not used for oils, lubricants, chemical solutions, or any other liquid substances that are not safe for consumption.
This ensures that the water remains safe to drink and is not contaminated by substances that could pose health risks. For instance, liquid-liquid solutions involving oil, such as those from oil spills, cannot mix with water due to their differing chemical compositions, which could lead to contamination if not managed properly. Moreover, wastewater from processes like hydraulic fracturing may contain harmful substances that make it unsuitable for storage in FAWPSS drums intended for potable water.