To obtain the BASE data on CD-ROM, please read, fill out and sign the Notification Prior to Use of Data form -  Building Assessment Survey and Evaluation Study - Notification Prior to Use of Data Form (PDF) (2 pp, 20 K) and fax, email or mail it to:

US EPA/Indoor Environments Division
BASE Workgroup
1200 Pennsylvania Avenue, N.W.
Mail Code 6609T
Washington, DC 20460

Email: Laureen Burton (burton.laureen@epa.gov)
FAX: (202) 343-2393

The data have undergone documented quality assurance procedures and all reasonable efforts have been made to ensure the validity of the data. However, anomalies may be discovered as analysis is made. 

For more detailed information on the BASE study see www.epa.gov/indoor-air-quality-iaq/building-assessment-survey-and-evaluation-study.