| (8) Remediation of toxic contaminants. Procedures appropriate for toxic contaminants (lead, microbial, asbestos, hazardous chemical, etc.) should be utilized if such contaminants are expected or discovered during renovation and in some cases must be utilized under state and federal law. (9) Filters. Filters should be changed more frequently during contaminant-generating activities, and also replaced after work is completed. The highest possible MERV rated filters should be used during renovation and for a few days after to minimize exposure to renovation related particulates and dust. (10) HVAC equipment. Ensure that HVAC equipment is protected from damage and entry of contaminants. (11) Water-damage. Porous building supplies that become water-damaged should be discarded to avoid the potential for mold contamination. (12) Re-occupancy. All renovated areas should be thoroughly cleaned utilizing high-efficiency particulate air (HEPA) filtered vacuuming and adequately ventilated prior to re-occupancy. (c) HVAC system testing. For new construction and major remodeling, the HVAC systems in those areas should be tested and balanced by an independent certified contractor at the completion of construction or remodeling. (d) Commissioning of building. Building commissioning of new and/or renovated buildings should be provided by a trained and knowledgeable commissioning authority according to recognized national standards to assure proper operation of all building systems. (e) Design Documentation. Design documentation including the owner's project requirements (design intent), and basis of design should be retained for the life of the facility. As-built documents should be prepared during construction and retained at the facility. (f) Monitoring activities. Construction and renovation activities should be monitored by the owner's representative, facility IAQ coordinator, and commissioning authority. (g) Ventilation Protocols. Ventilation protocols should be developed to include proper area exhaust rates and pressurization requirements to be used during repairing and remodeling. During initial occupancy of a new area and during re-occupancy following repairs or renovations, the fresh air rate and the total air supply rate may need to be increased until any out gassing of the new material has decreased to a level that will not cause adverse heath effects to the occupants.