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i <br /> dusts to accumulate. These items e.g., papers, folders, boxes anal e it difficult for custodial <br /> staff to clean. Items should be relocated and/or be cleaned periodically to avoid excessive dust <br /> build up. In addition, these materials can accumulate on flat surfaces .g., desktops, shelving � <br /> and carpets) in occupied areas and subsequently be re-aerosolized causing further irritation. <br /> number of air diffusers, ea aust retum vents and personal fans were observed with <br /> accumulated dust debris(Pictures 6 and 27). If exhaust vents are not functioning, bael draffing <br /> can occur, which can re-aerosolize accumulated dust particles. lie-activated supply vents and <br /> fans can also aerosolize dust accumulated on vents/fan blades. Several rooms had various <br /> objects hung from the ceiling tile system (Picture 28). Building occupants should refrain from <br /> hanging objects to prevent damage to the ceiling tile system. Damaged/di slodged ceiling tiles <br /> can provide a pathway for the movement of drafts, dusts and particulate natter between rooms <br /> and floors. <br /> The majority f floor surfaces in the school are covered by wall to wall carpeting, which <br /> in most cases appears to be original to the building — 15 years old). Several occupants had <br /> carpet cleaning complaints. The Institute ofInspection, Cleaning and Restoration Certification <br /> (11CRC), recommends that carpeting be cleaned annually or semi-annually in soiled high traffic <br /> areas) IICRC, 2005). Since the average lifespan of a carpet in a school environment is <br /> approximately eleven years (Bishop, 2002), consideration should be given to planning for the <br /> installation of new flooring as funds become available. <br /> Finally, the MMHS uses a work order format to generate maintenance requests. Due to <br /> the amount of issues raised by occupants and conditions observed by M PH IAQ staff during <br /> the assessment e.g., water-damaged/missing ceiling tiles), it appears that occupants are either <br /> 1 <br />