This one-hour session will review updates to EPA's fact sheet Using Qualified Data to Document an Observed Release and Observed Contamination and changes to how certain types of qualified data can be used in Hazard Ranking System (HRS) evaluations. This session is designed for Environmental professionals that conduct HRS evaluations as part of EPA site assessment in evaluating sites for the National Priorities List (NPL). To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/HRS-Qualified-Data_092823/