Mold in a residential unit: which sequence reflects the correct handling steps?

• A. Notify the tenant only after remediation is complete.
• B. Hire remediation professionals without addressing water intrusion.
• C. Identify the cause after remediation is complete.
• D. Identify the cause (water intrusion); contain the affected area; notify the tenant; hire licensed remediation professionals; fix water intrusion; verify clearance.

Answer: (D)

When mold appears in a residential unit, the priority is to stop spread, fix the moisture source, and confirm the space is safe again. Start by identifying the cause of the mold, which is usually water intrusion or excess moisture. Next, contain the affected area so spores don’t migrate to other rooms or surfaces and so occupants aren’t exposed. Communicate with the tenant about what’s found and what steps will be taken to protect health and safety. Hire licensed remediation professionals to perform the cleanup using proper containment, PPE, and equipment. Then address and repair the water intrusion or moisture source to prevent recurrence. Finally, verify clearance to ensure the space is free of mold and safe for reoccupancy, often through a combination of inspection and, if required, post-remediation testing. Skipping any of these steps can lead to ongoing mold exposure, recontamination, or unresolved moisture issues.