Page 55 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers
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36 Cha pte r T w o
The total site area is the sum of all the independent areas:
A = LSNAT + WETNAT + LSMAN + WETMAN + BF + HS (2.0.2)
T
The development footprint (see SS Credit 1) is defined as the areas with hard or hardpacked
surfaces:
DF = BF + HS (2.0.3)
Open space, as defined in SS Credit 5.2, is the combination of all natural and landscaped
areas and low-sloped wet areas except for those considered to be hardscape:
OS = LSNAT + WETNAT + WETMANLS + LSMAN (2.0.4)
The previously developed area, as defined in SS Credit 5.1, is everything that is not
natural:
PD = A − LSNAT − WETNAT (2.0.5)
T
And the total roofed (TR) area is the planar projection of the roofed areas (BF) less the
roof equipment areas:
TR = BF − EQR (2.0.6)
Areas of natural ledge have not been specifically addressed, but if in the natural areas,
these would most likely be included in the open space and excluded from the previously
developed areas. If areas of natural ledge are in the developed areas, then they would
most likely be included in the hardscape summation. Each case would be subject to
interpretation.
Sustainable Sites Prerequisites
SS Prerequisite 1: Construction Activity Pollution Prevention
USGBC Rating System
This prerequisite is intended to control erosion and pollutant transport off-site during and
after construction to minimize their impact on the surrounding areas and on water and air
quality. LEED-NC 2.2 and LEED 2009 list the Intent, Requirements, and Potential
Technologies and Strategies (2.2) for this credit as follows:
Intent
Reduce pollution from construction activities by controlling soil erosion, waterway
sedimentation and airborne dust generation.
Requirements
Create and implement an Erosion and Sedimentation Control (ESC) Plan for all construction
activities associated with the project. The ESC Plan shall conform to the erosion and
sedimentation requirements of the EPA Construction General Permit OR local erosion and
