Reduced pressure in the pipe may allow contaminated water from the soil, from storage, or from other sources to be drawn up into the system.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: Reduced pressure in the pipe may allow contaminated water from the soil, from storage, or from other sources to be drawn up into the system. ### Response: .