Page 233 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

LEED Materials and Resour ces 207

Special Circumstances and Exemplary Performance (LEED 2009 MRc1.2)
The calculations are also summarized in Table 5.1.1 and will be further explained in
later sections as they relate to the other credits. Note that MRc2 (construction waste
management) may include the weight or volume of existing nonstructural interior items
which are to remain if and only if MRc1.2 is not applied for. Also, MRc1.2 is not
dependent on obtaining MRc1.1.
There is no EP point related to MRc1.2. It is the author’s opinion that this is so
because it is not very reasonable to encourage more than a 50 percent reuse of interior
surfaces as many are worn over time or may have been made from materials not
considered to be as sustainable as products encouraged in the USGBC rating system.

5.2 MR Credit Subcategory 2: Construction Waste Management
The construction waste management subcategory covers what is commonly called
construction and demolition (C&D) debris. In LEED 2.2, one point is awarded for MRc2.1
(50% diversion), and an additional one point can be awarded for MRc2.2 (75% diversion)
in addition to the one for MR credit 2.1. LEED 2009 has consolidated both into the single
MRc2 subcategory with similar varying points depending on compliance, one point for
50 percent and two points for 75 percent.

MR Credit 2: Construction Waste Management—Divert from
Disposal (LEED 2009)

USGBC Rating System MR Credit 2
LEED-NC 2.2 lists the Intent, Requirements, and Potential Technologies and Strategies
for this credit as follows, with notations for the LEED 2009 changes included:

Intent
Divert construction and demolition debris from disposal in landfills and incinerators.
Redirect recyclable recovered resources back to the manufacturing process. Redirect
reusable materials to appropriate sites.
Requirements
Recycle and/or salvage at least 50% (for one point and 75% for two points in LEED 2009) of
non-hazardous construction and demolition debris. Develop and implement a construction
waste management plan that, at a minimum, identifies the materials to be diverted from
disposal and whether the materials will be sorted on-site or commingled.
Excavated soil and land-clearing debris do not contribute to this credit. Calculations can
be done by weight or volume, but must be consistent throughout. (As noted in Table 5.0.0,
LEED 2.2 has a now modified MRc2.2 credit for diverting 95 percent.)
Potential Technologies and Strategies
Establish goals for diversion from disposal in landfills and incinerators and adopt a construction
waste management plan to achieve these goals. Consider recycling cardboard, metal, brick,
acoustical tile, concrete, plastic, clean wood, glass, gypsum wallboard, carpet and insulation.
Designate a specific area(s) on the construction site for segregated or commingled collection
of recyclable materials, and track recycling efforts throughout the construction process.
Identify construction haulers and recyclers to handle the designated materials. Note that
diversion may include donation of materials to charitable organizations and salvage of
materials on-site.