Page 298 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

LEED Indoor Envir onmental Quality 261

Requirements
Develop and implement an Indoor Air Quality (IAQ) Management Plan for the pre-
occupancy phase as follows (LEED 2009 adds that it is implemented after all finishes have
been installed and the building has been completely cleaned):
OPTION 1—Flush-Out
• (Option 1: Path 1 for LEED 2009) After construction ends, prior to occupancy and
with all interior finishes installed, install new filtration media and perform a building
flush-out by supplying a total air volume of 14,000 cu. ft. of outdoor air per sq. ft. of
floor area while maintaining an internal temperature of at least 60 degrees F and
relative humidity no higher than 60%.
OR
• (Option 1: Path 2 for LEED 2009) If occupancy is desired prior to completion of the flush-
out, the space may be occupied following delivery of a minimum of 3,500 cu. ft. of outdoor
air per sq. ft. of floor area to the space. Once a space is occupied, it shall be ventilated at a
minimum rate of 0.30 cfm/sq. ft. of outside air or the design minimum outside air rate
determined in IEQ Prerequisite 1, whichever is greater. During each day of the flush-out
period, ventilation shall begin a minimum of three hours prior to occupancy and continue
during occupancy. These conditions shall be maintained until a total of 14,000 cu. ft./sq. ft.
of outside air has been delivered to the space.
OR
OPTION 2—Air Testing
• Conduct baseline IAQ testing, after construction ends and prior to occupancy, using
testing protocols consistent with the United States Environmental Protection Agency
Compendium of Methods for the Determination of Air Pollutants in Indoor Air and
as additionally detailed in the 2009 Reference Guide.
• Demonstrate that the contaminant maximum concentrations listed ‘below’ are not
exceeded.
CONTAMINANT MAXIMUM CONCENTRATION
Formaldehyde 27 parts per billion (was 50 ppb in
LEED 2.2)
Particulates (PM10) 50 micrograms per cubic meter
Total Volatile Organic Compounds (TVOC) 500 micrograms per cubic meter
4-Phenylcyclohexene (4-PCH) ∗ 6.5 micrograms per cubic meter
Carbon Monoxide (CO) 9 parts per million and no greater
than 2 parts per million above
outdoor levels
∗ This test is only required if carpets and fabrics with styrene butadiene rubber (SBR) latex
backing material are installed as part of the base building systems.
• For each sampling point where the maximum concentration limits are exceeded
conduct additional flush-out with outside air and retest the specific parameter(s)
exceeded to indicate the requirements are achieved. Repeat procedure until all
requirements have been met. When retesting non-complying building areas, take
samples from the same locations as in the first test.
• The air sample testing shall be conducted as follows:
1) All measurements shall be conducted prior to occupancy, but during normal
occupied hours, and with the building ventilation system starting at the normal