OPTION 1 — Flush-Out

• After construction ends, prior to occupancy and with all interior finishes installed, perform a building flushout 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%.

• 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 EQ 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.

• 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 Reference Guide.
• Demonstrate that the contaminant maximum concentrations listed below are not exceeded.
  

  Contaminan	Maximum Concentration
  Formaldehyde	50 parts per billion
  Particulates (PM10)	50 micrograms per cubic meter
  Total Volatile Organic Compounds (TVOC)	500 mircrograms per cubic meter
  *4-Phenylcyclohexene (4-PCH)	6.5 micrograms per cubic meter
  Carbon Monoxide (CO)	9 parts per millions 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 daily start time and operated at the minimum outside
  air flow rate for the occupied mode throughout the duration of the air testing.
  2) The building shall have all interior finishes installed, including but not limited to millwork, doors, paint,
  carpet and acoustic tiles. Non-fixed furnishings such as workstations and partitions are encouraged, but
  not required, to be in place for the testing.
  3) The number of sampling locations will vary depending upon the size of the building and number of ventilation
  systems. For each portion of the building served by a separate ventilation system, the number of
  sampling points shall not be less than one per 25,000 sq.ft., or for each contiguous floor area, whichever
  is larger, and include areas with the least ventilation and greatest presumed source strength.
  4) Air samples shall be collected between 3 feet and 6 feet from the floor to represent the breathing zone of
  occupants, and over a minimum 4-hour period.