IICRC Applied Microbial Remediation Technician (AMRT) Practice Exam 2025 - Free AMRT Practice Questions and Study Guide

Effluent extraction is the most effective method for addressing sewage in crawlspaces because it directly removes the contaminated water and waste material. This method involves using specialized pumps and equipment to safely extract sewage and prevent further spread of contaminants. The key aspect of effluent extraction is its ability to not only remove liquid waste but also reduce the potential for hazardous material to linger in the environment, which is crucial in preventing health risks associated with sewage exposure.

While enzyme treatment, aeration, and limited soil removal can play roles in remediation, they do not directly address the immediate need to remove sewage. Enzyme treatment involves the application of biological agents to break down organic matter, but it is not effective on its own without the prior removal of the sewage. Aeration can help with drying and reducing odors but does not solve the contamination problem. Limited soil removal may address some issues but is not comprehensive enough to handle the entire sewage scenario, especially in preventing further contamination or health risks.

Therefore, effluent extraction stands out as the safest and most effective approach for resolving sewage in crawlspaces, as it addresses both the removal of the hazardous material and the subsequent mitigation of associated risks.