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DocuSign Envelope ID:6A1278D6-4287-4002-98A9-C69C8C1D313E <br /> Indoor Environmental Air Quality Assessment <br /> materials. In order to fully inspect the water damaged areas and determine <br /> the full extent of the moisture issues,removal of additional building <br /> materials may be necessary. <br /> • It is possible that no additional signs of suspect microbial growth are <br /> observed outside of the known areas of wetness/growth but a thorough <br /> intrusive inspection by the remediation contractor will help determine the <br /> condition. <br /> ■ Standard remediation quality controls such as air filtration devices(AFDs),negative <br /> pressure, and containment should be used. The remediation contractor should follow <br /> any additional cleaning standards pertaining to this situation, as set forth by the <br /> IICRC S520 and other industry cleaning standards. <br /> o Step 3: Cleaning of Condition 2 and Condition 3 areas: <br /> ■ Condition 2 non-porous/semi-porous building materials and contents can typically be <br /> cleaned. Condition 3 porous building materials and contents generally are not <br /> restorable. <br /> ■ Condition 3 semi-porous contents should first be examined for unrestorable water <br /> damage or mold damage prior to determining if they can be remediated. <br /> ■ Structural materials that are significantly contaminated but cannot be removed(such <br /> as wooden wall framing)must be thoroughly cleaned using HEPA-vacuuming and <br /> anti-microbial wiping as indicated in the"Protocol References"listed below. <br /> • In some situations,the remediator may recommend encapsulating building <br /> materials with anti-microbial paint,which should only be performed after <br /> the remediation is complete and a passing PRV clearance test is achieved <br /> (see Step 4). <br /> ■ A licensed and/or certified HVAC contractor should be engaged to repair and/or <br /> clean the entire HVAC unit(s)that service this building. This may or may not be the <br /> remediation contractor. A National Air Duct Cleaning Association(NADCA) <br /> certified firm should be engaged to clean the entire HVAC system and ductwork. If <br /> the ductwork is insulated on the inside,it cannot be cleaned and will have to be <br /> replaced. <br /> • To continue to determine the effectiveness of the dehumidification of the <br /> HVAC system,the HVAC unit should be inspected by a professional HVAC <br /> contractor. Humidity levels should remain below 60%. <br /> ■ Any porous possessions with visible suspect microbial growth(Condition 3) should <br /> be replaced if possible. All other possessions and contents should be cleaned. Air <br /> scrubbing, antimicrobial fogging/wiping, and cleaning of the building materials, <br /> possessions and hard surfaces should be performed. <br /> ■ Non-porous and semi-porous Condition 2 contents within the building should be <br /> thoroughly cleaned using HEPA-vacuuming and anti-microbial wiping as indicated <br /> in the"Protocol References"listed below. The interior of the rooms should be <br /> thoroughly cleaned using HEPA-vacuuming and anti-microbial wiping to remove <br /> fungal growth, dust, and potential settled fungal spores. The affected areas should <br /> also be fogged by an antimicrobial. <br /> • These activities should occur under engineering controls such as air <br /> scrubbing,pressurization, and containment. See more in in the"Protocol <br /> References"listed below. <br /> Environmental Solutions Group • 7 Maple Leaf Drive,Ste 104, Greensboro, NC 27410 • 336-373-1538 5 <br /> www.Go-ESG.com <br />