LEED Letter: USGBC & More Than 1200 Signatories Ask GSA to Continue to Use LEED Written by LEaD Blogger on July 25th, 2012. Leave a comment URL: https://new.usgbc.org/articles/letter-usgbc-x-signatories-ask-gsa-continue-use-leed/ Feature image: July 25, 2012 Acting Administrator Daniel Tangherlini U.S. General Services Administration One Constitution Square 1275 First Street, NE Washington, DC 20417 Dear Acting Administrator Tangherlini, read more