The U.S Green Building Council (USGBC) is soliciting input on the rating system during this second public comment period. LEED 2009 is a new version of the rating system that delivers against key environmental and human health impacts, and puts in place a transparent framework for weighting credits accordingly, based on the best available science.
The first public comment period for LEED 2009 ran May 19 to June 22, 2008, and received 5,800 comments. The second public comment period opened yesterday, August 19, and will be open through 5pmPT on September 2. The shorter time frame reflects the fact that only changes made in response to the first public comment period are now up for comment.
All technical comments from the first period that were within the scope of the proposed credit changes under LEED 2009 were reviewed by the LEED Technical Advisory Groups (TAGs) and are now reflected in tracked changes to the credit language. Even though a comment may have been made on only one rating system, it was applied across all rating systems to keep credits aligned where applicable. Technical comments that were outside of the LEED 2009 scope will be discussed as part of the next LEED development cycle, which will happen at regular intervals going forward.
Following is a sampling of the revisions most frequently suggested or most technically changed, by credit category. More are listed on the USGBC site.
Credit 2: Development Density & Community Connectivity – If the project is mixed use, it may be considered one of the ten basic services that are required to be located within ½ mile, as long as the service is open to the public.
Credit 4.3: Alternative Transportation: Low Emitting & Fuel Efficient Vehicles – The language that said one low-emitting/fuel-efficient vehicle must be provided per 8 people should have said 267 occupants.
Credit 1: Water Efficient Landscaping: Reduce by 50% – Groundwater language was moved from the Potential Technologies & Strategies to the Requirements section.
Energy & Atmosphere
Prerequisite 2 & Credit 1: Optimize Energy Performance – Additional ASHRAE Advanced Energy Design Guides are now included under the prescriptive path for compliance. Additional point thresholds have been added in EAc1.
Credit 5: Measurement & Verification (M&V) – Corrective action is now required if the results of the M&V plan indicate that energy savings are not being achieved.