Which method is utilized to determine lead-negative or lead-positive properties at a development-wide level?

The method that is utilized to determine lead-negative or lead-positive properties at a development-wide level is the 15% decision flow chart. This approach is particularly useful for assessing large areas or multiple properties and offers a systematic way to evaluate the presence of lead-based materials.

The 15% decision flow chart helps in making decisions based on a defined threshold, aiding inspectors in determining whether a property can be classified as lead-positive or lead-negative based on a specific percentage of lead presence in painted surfaces or other materials. This methodology allows for consistent and standardized assessments across a development, simplifying the process of identifying risk levels related to lead exposure.

This chart outlines a structured pathway for decision-making, which includes specific criteria and steps that can guide inspectors through the assessment process. Utilizing this method ensures that evaluations are not only thorough but also aligned with regulatory standards, promoting safety and compliance with environmental health guidelines.