Entry Type ID Date Applicable Rating System Primary Credit Inquiry (LIs) Ruling (LIs) Related Addenda/LIs Related Resources Campus Applicable Internationally Applicable Country Applicability Reference Guide (Addenda) Page (Addenda) Location (Addenda) Description of Change (Addenda) "LEED Interpretation" "10071" "2006-01-20" "New Construction, Commercial Interiors" "MRc2.1-2.2 - Construction waste management" "Our project scope includes the tenant improvement of a 39,000 SF office space. The space was previously occupied by another tenant. Much of the existing interior construction and finishes were saved, though some were demolished. During the construction of our project, all construction waste was sorted and sent for recycling. Throughout the span of the five month project, over 92 tons of refuse was produced, 84.5 tons of which, or 93% was sent to recycling. Our efforts fell just short of the 95% recycling threshold set by the LEED-NC system (per CIR dated 1/11/2005) for this credit to be considered for and exceptional performance ID credit. Though challenging, achieving a recycling threshold of 95% on LEEDNC projects is extremely plausible especially in the Bay Area which has excellent recycling programs. It is also reasonable to achieve as this LEED-NC credit would most plausibly consider the recycling of demolition if it is not a greenfield site. Demolition under the LEED-NC system would likely include heavy core and shell materials such as concrete, steel and wood and skin materials such as CMU, glass and metals. All these materials are recyclable. In terms of our tenant improvement project, the waste produced includes construction scrap, construction packaging and demolished interiors of the previous building condition. Demolition that was recycled includes drywall, metals (mostly steel studs), and glass. The project scope did not include the demolition of more weighty core and shell materials such as concrete and steel. Skin systems such as glass and aluminum also were not demolished on this project. If the project scope also included the demolition of heavy core and shell materials such as concrete and steel, our recycling threshold would have been easily pushed from 93% to above the 95% threshold set by the LEED-NC CIR. Though this project did not meet the 95% recycling performance threshold set by the LEED-NC CIR, we ask that the threshold be lowered to the neighborhood of 90% in the LEED-CI system. Given the recyclability of most interiors in addition to construction scrap, we believe it is unreasonably difficult to achieve a recycling rate of 95% in the CI system as most interior projects will not include the demolition of Core and Shell which likely will skew the recycling percentage to above 95%." "The threshold for exemplary performance related to construction waste management will remain at 95% materials diversion from the landfill. The MR TAG considers this threshold reasonable for both LEED-NC and LEED-CI." "None" "None" "LEED Interpretation" "10265" "2013-01-01" "New Construction, Core and Shell, Schools - New Construction, Healthcare, Data centers - New Construction, Hospitality - New Construction, Retail - Commercial Interiors" "MRc2.1-2.2 - Construction waste management" "Is a campus-like approach for MRc2 acceptable for two LEED-NC v2009 registered projects each pursuing one-off certification? Space is limited on the urban site for recycling dumpsters, therefore the best approach for CWM may mean that waste and recycling for all LEED registered projects will need to be aggregated and tracked together. AGMBC Master Site / Campus is not utilized, yet we propose using the AGMBC precedent for MRc2 documentation. We propose to track together all demolition, construction waste/diverted, & land clearing material for the project and then apply a weighted average based on GSF to each LEED project. " "The applicant has requested to use a weighted average approach for Materials and Resources Credit 2 Construction Waste Management for several buildings that are pursuing one-off LEED Certification under LEED BD&C. Yes, the project may utilize a weighted approach based on gross floor area to determine the total construction waste for each building pursuing certification. For each LEED BD&C Building, the project team will be required to identify the materials that are diverted from disposal and provide calculations documenting the diversion rate. Each building must meet the required threshold for waste diversion in order to earn the credit. In addition, the Construction Waste Management (CWM) Plan must outline goals for diversion for each building, not just as an aggregate across all projects. Note that if the waste is comingled and sorted offsite, the project may follow the requirements outlined in LEED Interpretation 3000 for determining and documenting the diversion rate. This ruling addresses only projects pursing LEED Certification under the BD&C Rating Systems and does not set any precedent or guidelines for projects pursuing certification under different LEED Rating Systems. Applicable internationally." "10292" "None" "X" "LEED Interpretation" "1685" "2007-02-06" "New Construction, Core and Shell, Schools - New Construction, Commercial Interiors" "MRc2.1 - Construction waste management - divert 50% from landfill" "This CIR asks for further clarification of the ruling dated 3/23/2004 that states ""Incineration cannot be used as an alternative method for diverting waste from the landfill for purposes of credit achievement."" Our recycling facility processes construction and demolition (C&D) debris into numerous commodities. One of these products is Wood Derived Fuel (WDF) which is sold to local paper mills to replace virgin wood, natural gas and oil. While the product is burned, it is not incinerated. The USEPA has recently provided a category for such materials and defined them as Biofuel: A gaseous, liquid, or solid fuel that contains an energy content derived from a biological source. WDF has an energy content value of 8,500 Btus per pound of fuel and is derived from the collection, sorting and processing of C&D waste. The LEED Reference Guide defines recycling as ""the collection, reprocessing, marketing and use of materials that are diverted or recovered from the solid waste stream."" Before accepting co-mingled C&D debris for processing, the recycler we use demands that we provide Asbestos Hazard Emergency Response Act (A.H.E.R.A.) documentation proving the C&D loads have been inspected and abated. In addition, they maintain on-site testing equipment to detect lead & asbestos (such as XRF for lead and a polarized light microscope for asbestos). C&D debris that passes these tests is then accepted and sent through an elaborate sorting system where commodities ranging from LDPE plastic to Steel are separated and sold. Wood represents the largest volume of material they accept and is processed into 4-different commodities including WDF, Colorized Mulch, Pulp Furnish and Alternate Daily Cover. Facilities that purchase WDF have boiler permits that meet the requirements of 40 CFR Part 63 of the USEPA National Emission Standards (http://www.epa.gov/epacfr40/chapt-I.info/). Prior to the development of recycled WDF, most C&D wood waste was land filled and lumber mill saw dust was used as WDF. As the market for recycled WDF has developed, its use has resulted in lumber mill wood waste residuals traditionally consumed as fuel to be up-cycled into particle board, pulp and MDF, which is currently the highest use of this resource. . When C&D wood waste is land filled, the anaerobic conditions present in a landfill result in wood waste generating large quantities of methane gas. Methane gas has a global warming potential that is 23 times more hazardous than CO2 (http://www.rmi.org/sitepages/pid1215.php, November 08, 2006), where as consuming WDF in a modern industrial boiler is considered carbon neutral. The CIR ruling dated 3/23/2004 specifically denies diversion credit for C&D debris delivered to a mass-burn incinerator that uses excess heat to generate electricity, (Waste to Energy, WTE). The CIR recognized that the primary function of a WTE incinerator is to reduce the volume of waste placed in a landfill. The incinerator accepts everything that could be delivered to the landfill and they charge as much or more than is typically charged for landfill disposal. In contrast, our permitted recycling facility creates a recycled content commodity that is sold for profit. They manufacture WDF from a portion of the C&D debris they receive and they sell the WDF to paper mills that operate USEPA permitted industrial boilers to produce the heat energy needed to manufacture and recycle paper. Use of this product as a commodity is consistent with the LEED Reference Guides definition of recycling and with CIR dated 5/17/2004 for the production of Alternative Daily Cover. Audit documentation, such as receipts of sale of WDF to USEPA permitted facilities, can provide evidence of material diversion as WDF. For these reasons, we believe producing Wood Derived Fuel (WDF) meets the intent of the credit and seek to gain a ruling as such from the USGBC materials TAG." "Based on the process description provided, Wood Derived Fuel (WDF) meets the intent of this credit. The WDF process described differs from incineration processes that are not allowed in this credit because the recycling facility provides a value-added process; it is a service that exists to sort and distribute materials appropriate to the highest end uses possible. In addition, the revenue generated by the WDF commodity helps to make this business successful and thus facilitates recycling of wood to other end uses as well as recycling of other materials. Applicable Internationally." "None" "None" "X"