The 9/5/2006 allows projects to provide both IAQ testing and building flush-out in different construction phases. We intend to provide IAQ testing and building flush-out in different areas of the building within the same construction phase. Our project is a high school addition/renovation that will be occupied in phases. The first phase of construction is complete and those spaces were tested, prior to occupancy, based on the credit ruling dated 10/8/2002. The second phase of the project includes a pool and academic spaces. We are concerned that the chemicals used in the pool will adversely impact the testing results. We therefore propose flushing out that space, using the \'purge mode\' on the pool\'s mechanical unit. Based on the 9/8/2004 credit ruling, we will achieve 14,000 cu ft of outdoor air per square foot of floor space in less than 5 days. As the rest of the Phase 2 areas will not meet the flush-out criteria prior to the scheduled occupancy, we therefore intend to provide IAQ testing in the remaining portions of the building. Until both the IAQ testing and the flush-out is complete, we will prevent cross-contamination between areas. Protection measures will follow the SMACNA Guidelines for Occupied Buildings as outlined in the Construction IAQ Management Plan. Please confirm if the proposed compliance path meets the credit intent. If it is not acceptable, please clarify what changes are required in order to meet the credit requirements.
The applicant is requesting clarification regarding the implementation of flush-out procedures and IAQ testing during the same construction phase. As described, the proposed approach appears to satisfy the credit intent. The indoor air quality problems from construction activity in each space are either reduced from a flush-out or confirmed to be minimal from IAQ testing. Please note, however, that IAQ testing procedures for LEED-NC v2.2 are outlined in the LEED-NC v2.2 Reference Guide and are not identical to the testing procedure outlined in the 10/8/2002 CIR (applicable to LEED-NC v2.1). The reference guide has more stringent maximum concentration requirements and additional testing procedure guidelines. Also note, the air contaminants from swimming pool chemicals, such as chlorine, will not affect the concentration levels tested for this credit. Applicable Internationally.