Reference Guide. When to Use LEED for Existing Buildings: Operations & Maintenance LEED for Existing Buildings: O&M was designed to certify the sustainability of ongoing operations of existing commercial and institutional buildings. All such buildings, as defined by standard building codes, are eligible for certification under LEED for Existing LEED 2009 for Existing Buildings: Operations and Maintenance SS Credit 8: Light Pollution Reduction Describe the circumstances limiting the project team's ability to provide the submittals required in this form. eLibrary > USGBC LEED Reference Guide for Green Building Design and Construction 2009. Expand All USGBC LEED Reference Guide for Green Building Design and Construction - Updated 201006, 2009. Cover. Preface. Preface from USGBC. Building Reuse-Maintain Existing Walls, Floors, and Roof. Addenda LEED Reference Guide for Green Building Design and Construction February 2, 2011 For the documents titled: LEED Reference Guide for Green Building Design and Construction, 2009 Edition (first edition) Note: This document contains addenda to the reference guide listed above and will be published on a quarterly basis beginning in April 2010. • Extend the life cycle of existing building stock *Assessment based example given in the LEED Reference Guide for Building Design and Construction LEED Green Building Leadership LEED V3 (2009) What LEED aims to achieve) 1 product rating - LEED Reference Guide for Building Design and Construction BD+C v4 - Great Study. $49.00. 2009 Edition by See more like this. LEED for Existing Buildings: The LEED standards are maintained by the U.S. Green Building Council (USGBC), a nonprofit, non-governmental, membership-based organization. While participation in LEED is voluntary, the program owes some of its growth to municipal and state ordinances that have mandated it for public buildings and have offered incentives for private buildings. to GSA's Green Building Certificati