What is the recommended method to determine Substrate Correction Values?

The recommended method for determining Substrate Correction Values involves taking three readings on bare substrates in multiple spots. This approach is essential because it allows inspectors to acquire a reliable representation of the lead concentration on different areas of the substrate, which is necessary for accurate assessment and analysis. Bare substrates can reflect the presence of lead more truly compared to painted surfaces, which may have additional layers or coatings affecting the readings.

By taking readings from various spots, the method not only enhances the accuracy of the data but also accounts for possible variations in lead levels across the surface being tested. This comprehensive method ensures that the calculated correction values are based on a thorough understanding of the substrate's condition, leading to more accurate results in lead assessments. This focus on bare substrates and multiple locations aligns with best practices in lead inspection and risk assessment, providing a solid foundation for evaluating lead hazards effectively.