The Cleared Unit That Wasn't Clear
You are hired by a landlord to perform a clearance examination after a window-replacement job in a 1958 duplex unit. The contractor says he 'wiped everything down' and the unit looks clean. You are doing single-surface wipe sampling per the applicable clearance protocol. You collect sill wipes in the two bedrooms and the kitchen, plus one floor wipe in the living room. All results come back below the applicable clearance thresholds, and you are about to sign the clearance report. The tenant mentions in passing that her toddler 'eats off the window ledge in the hallway' and that she has seen paint chips on the hallway floor since the work. You did not sample the hallway because the contractor told you the work area was limited to the two bedrooms and kitchen.
1. What is the central judgment error in this scenario, and what should you do before signing?
Read the worked answer
The error is accepting the contractor's definition of the work area rather than determining the actual scope of dust-generating activity yourself. Clearance is only valid for the area actually disturbed; if the hallway was part of the work or was contaminated by it, the clearance is incomplete regardless of passing numbers elsewhere.
Before signing:
- Interview the tenant and contractor about the full extent of work and traffic paths.
- Visually inspect the hallway, especially window components and floor, for dust and chips.
- Extend sampling to the hallway (sills, trough, floor as the protocol requires) and re-evaluate.
- Document the discrepancy between the stated work area and observed conditions.
A clearance report that omits an affected area is misleading even if every number passes.
2. The tenant's statement about paint chips and a toddler is a hazard-communication trigger. What must you do with that information, and how does it interact with your clearance decision?
Read the worked answer
Visible paint chips and a child with pica-like behavior are a potential exposure pathway, not a cosmetic complaint. You must:
- Record the observation in the field notes and report.
- Treat visible chips as a failure of visual clearance in that area until removed and re-cleaned.
- Advise the client of the child's risk and the need to control access to the area until re-cleaning and re-clearance.
- Avoid giving medical advice; refer the family to a healthcare provider and to the appropriate childhood lead screening program.
Clearance is a pass/fail judgment on the whole unit, so a failing visual in the hallway overrides passing wipes in other rooms.