What materials should assessors use to ensure they are not cross-contaminating during testing?

To prevent cross-contamination during testing, assessors should use new sponges, wipes, or sampling materials for each test. This practice is essential because it eliminates the risk of transferring lead particles or residues from one site to another, which could compromise the accuracy of the assessment. Using new materials ensures that each test is conducted under the same conditions and provides reliable results.

Using recycled or previously used materials carries the risk of contamination, as those materials might retain lead residues from past tests. Cloth wipes alone do not address the issue of contamination if reused or improperly cleaned. Therefore, starting each assessment with fresh, uncontaminated tools is a fundamental practice in lead paint risk assessment, ensuring the integrity of the findings and the safety of those involved in the testing process.