Section 2: Individual LEED Credit Reviews
LEED Credit EQ-5:
pressure and segregated exhaust for all janitor's
closets/housekeeping areas is also a P100
Indoor Chemical &
requirement1. While not specifically included in
P100, provisions for sinks in all janitor's closets,
Pollutant Source Control
and appropriate drainage for concentrated
chemicals in other specialized spaces (e.g., in
laboratories), are also standard expectations in
Intent
GSA projects.
Avoid exposure of building occupants to
Basis for Cost Assumption
potentially hazardous chemicals that adversely
impact air quality.
For the Courthouse model, the credit provisions
are assumed to be GSA standards, requiring no
Requirement
additional costs. In the Office Building model, a
Design to minimize pollutant cross-
cost premium is defined to install a permanent
contamination of regularly occupied areas:
entryway system (grille or grate) into an existing
vestibule or lobby space. It is assumed that some
Employ permanent entry way systems
of the older GSA buildings do not include these
(grills, grates, etc.) to capture dirt,
systems. The other credit provisions are assumed
particulates, etc. from entering the building
to be met as GSA standards for the modernization.
at all high volume entryways.
Where chemical use occurs (including
Summary of First Cost Impacts
housekeeping areas and copying/printing
rooms), provide segregated areas with deck
to deck partitions with separate outside
Courthouse (New Construction, 262,000 GSF)
exhaust at a rate of at least 0.50 cubic feet
per minute per square foot, no air re-
No identified cost premiums.
circulation and maintaining a negative
pressure of at least 7 PA (0.03 inches of
Office Building (Modernization, 306,600 GSF)
water gauge).
Provide drains plumbed for appropriate
Total Credit Cost.......................................... ,199
disposal of liquid waste in spaces where
Cost Impact ($/GSF) ..........................
||content||
.01/GSFwater and chemical concentrate mixing
Cost Impact (%), Min. Facade .................... 0.01%
occurs.
Cost Impact (%), Full Facade......................0.01%
(1 point)
Additional Considerations
Cost Impact = 2 or 3
None identified.
1
2
3
4
5
Synergistic Credits
GSA
No
Low
Moderate
High
Standard
premium,
premium
premium
premium
None identified (with construction cost impacts).
(no cost)
psble svgs
(<50K)
(50-150K)
(>150K)
Practical Applications
Although P100 doers not specify a pressure differential
1
for these rooms, the 7 PA threshold defined for the
A number of the requirements for this credit are
credit is considered readily achievable. Pressure testing
consistent with GSA standards. The use of
for these spaces would typically be performed by the
permanent walk-off mats, for instance, is
TAB contractor or Commissioning Agent using a
specifically called for in P100. Providing negative
manometer.
GSA LEED COST STUDY
145
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