New Jersey Lead Supervisor Practice Exam

The correct answer is 100 for the clearance test requirement for windowsills after lead work. This standard is established to ensure that surfaces where occupants may come into contact with lead dust, such as windowsills, are adequately cleaned and tested to protect public health, particularly for children who are more susceptible to lead exposure.

Following lead abatement or remediation work, a clearance test is performed to measure the amount of lead dust that remains on surfaces. The threshold of 100 micrograms per square foot (µg/ft²) for windowsills is guided by protocols intended to minimize the risk of lead poisoning. If lead dust levels exceed this standard, additional cleaning or remediation may be required.

This benchmark is part of adherence to stringent safety standards to ensure that the environment is safe for re-occupancy, especially in homes with young children or pregnant women. Compliance with these limits is an essential responsibility for lead supervisors and contractors involved in lead-safe practices.