From the looks of progress, this will not happen. At 4:10pm, Saturday, August 22 dust is waifting through the air in the building, while our teachers are rushing to prepare their classrooms for the children. There is dust everywhere and sawing, hammering, nailing, moving is going on as I type this email - please download the pictures, taken just minutes ago to see a sample of the existing conditions.
Ventilate when needed. Some construction activities can release large amounts of VOCs into the school, and if the school is already enclosed with walls, windows, and doors, outdoor air can no longer easily flow through the building and remove the VOCs. In addition to affecting the health of the construction workers, these VOCs can also be adsorbed onto other building materials and be re-released into the air later when the school is occupied by children and staff. During certain construction activities, temporary ventilation systems should be installed to quickly remove the gases.
Ventilation is generally needed when "wet" building materials are in use, when using materials that give off an odor, or when using materials that carry a manufacturer’s warning regarding the need for ventilation. Odors from building materials are the result of chemicals being released from the materials into the air, so if there is an odor present, it is safest to provide ventilation that will quickly remove those odors from the building. Examples of potentially problematic construction activities include painting (even with no- or low-VOC paints), spreading of floor adhesives, and use of large amounts of caulk, sealants, and cleaning agents. Additionally, the installation of large amounts of building materials, such as carpet or vinyl-based flooring products and composite wood cabinets and shelves, can require extra ventilation if the material has not been carefully selected or aired-out before being unrolled or unpackaged within the school.
During installation of carpet, paints, furnishings, and other VOC-emitting products, provide supplemental (spot) ventilation for at least 72 hours after work is completed. It is important that an exhaust fan be used to pull the polluted air out of the building, not to push outdoor air into the building. Simply opening windows or doors is not enough to effectively exhaust contaminants in most cases. The fan should be placed in a window or exterior door as close to the work area as possible, and any openings in the window or door around the fan be temporarily sealed with plastic or cardboard. Then open a window or exterior door at the opposite end of the room or building, so that fresher outdoor air will flow across the work area and sweep polluted air out through the exhaust fan. The size of exhaust fan needed will increase as the size of the room increases, and as the amount of gases being released into the air increases. The fan should provide about 5 air changes per hour (5 ACH). Divide the volume of the room in cubic feet by 12 to get the minimum amount of cubic feet per minute (CFM) that the fan must be able to exhaust. For example, a classroom with a volume of 9000 cubic feet (1000 square feet of floor area with 9 foot ceilings) divided by 12 results in a fan of 750 CFM. A 21 inch box fan may be sufficient for a single classroom if the materials are not too strong a source of gases, but would certainly not be sufficient for a wing or a whole school. As a rule of thumb, there may be enough airflow if odors do not spread out of the immediate area where the work is being performed, of if dust or smoke released into the air can be seen to be drawn towards the exhaust fan. As long as the odors or air pollutants are present, the temporary exhaust ventilation must continue to be operated, even during nights and weekends if necessary. Ventilation should continue for a minimum of 24 hours after completion, or until there are no longer any noticeable odors. "