Our project is a new multi-family residential building that will be occupied in phases. We intend to conduct baseline IAQ testing, as outlined in option 2. Once a constructed portion of the building is tested and ready for occupancy, those spaces will be protected as discussed in the SMACNA Guidelines for Occupied Buildings and will be outlined in the Construction IAQ Management Plan. Prior to the occupancy of any unit, we will also pressurize the corridors to prevent IAQ contamination from traveling between units or entering from either the stairwell or elevator shafts. For the common areas, sampling points will be determined in accordance with Requirement #3. We intend to provide one sampling point in the lobby, one in the main gathering rooms on the first floor, and one on each corridor floor; as all of these spaces are smaller than 25,000 sq ft. We would like clarification in determining the number of sampling points for the residential units. Requirement #3 states that a separate sampling point is required for each ventilation system. The residential units are naturally ventilated, but each unit has a separate air handling unit. We would like to propose two alternative compliance paths for residential projects: 1. We will provide one sample point per 7 units, consistent with the progressive sampling methodology discussed under EQp2, option 3. 2. We will provide one sample point for each unit type. This methodology is based on credit ruling LEED-NC v2.1 dated 3/31/2003. Similar unit types will have similar selection and quantities of construction materials. Therefore one test per unit type will represent the IAQ of all similar unit types. Please confirm which alternative compliance path meets the credit intent. If neither is acceptable, please clarify how the IAQ testing option may be applied to residential projects.