Establish the incident and access record
Record when water was discovered, the apparent source if known, areas affected, and actions already taken. Arrange source control through appropriate personnel. Keep people away from suspected electrical, structural, or contamination hazards and follow the relevant emergency and professional instructions.
Coordinate the affected spaces
Identify tenants above, below, and beside the reported area, along with common spaces and building systems that may be involved. Arrange access through property management. Protect confidential records and customer information when collecting photographs or sharing reports.
Ask for a documented mitigation handoff
EPA guidance describes investigating the moisture source and using measurements to monitor drying. Ask the qualified mitigation provider for its findings, affected-material record, work performed, monitoring information, and unresolved conditions. A surface that looks dry is not a complete handover record.