Indoor Chemical & Pollutant Source Control - EQc5 Intent To minimize building occupant exposure to potentially hazardous particulates and chemical pollutants Requirements Design to minimize and control the entry of pollutants into buildings and later cross-contamination of regularly occupied areas by employing permanent entryway systems to capture dirt and particulates entering the building at high volume exterior entrances, AND: Sufficiently exhaust each space where hazardous gases or chemicals may be present or used (e.g., garages, housekeeping and laundry areas, copying and printing rooms) to create negative pressure with respect to adjacent spaces when the doors to the room are closed. For each of these spaces, provide self-closing doors and deck-to-deck partitions or a hard-lid ceiling. The exhaust rate must be at least 9.2 m3/hr/m2 (0.50 cfm per sq.ft) with no air recirculation. The pressure differential with the surrounding spaces must be at least 5 Pascals (Pa) (0.02 in.wc) on average and 1 Pa (0.004 in.wc) at a minimum when the doors to the rooms are closed In mechanically ventilated buildings, install new air filtration media in regularly occupied areas prior to occupancy; these filters must provide a minimum efficiency reporting value (MERV) of 13 or higher. Filtration should be applied to process both return and outside air that is delivered as supply air Provide containment drains (i.e. a closed container for storage for off-site disposal in a regulatory compliant storage area, preferably outside the building) for appropriate disposal of hazardous liquid wastes in places where water and chemical concentrate mixing occurs (e.g., housekeeping, janitorial and science laboratories) The intent and requirements described on this webpage are paraphrased from the copyrighted works of the USGBC "LEED 2009 for New Construction and Major Renovations Rating System November 2008", and, the CAGBC "LEED Rating System & Addendum for New Construction and Major Renovations LEED Canada-NC version 1.0 December 2004", and are presented here strictly for informational purposes and are not intended to supplant or be used in place of the original copyrighted works.