mold remediation guidelines

Mold Remediation and Removal Guidelines

Remediators should perform remediation in compliance with the Institute of Inspection Cleaning and Restoration Certification (IICRC) mold removal guidelines, The State Department of Health & Mental Hygiene Bureau of Environmental & Occupational Disease Epidemiology guidelines or in compliance with EPA mold removal guidelines for schools and commercial buildings. HVAC remediation work should be done in compliance with NADCA recommendations. The remediator should follow any applicable recommendations that the indoor environmental professional included below.

Vacating the Premises

Vacating people from the adjacent spaces is usually only necessary for a large/widespread problem but is also recommended for individuals with reduced immune systems, elderly, infants, recent surgery patients, people with chronic inflammatory lung disease or individuals with respiratory health concerns.

Personal Protective Equipment

(PPE) Full-face respirators are to be worn. Gloves are to be worn to remove all infected building materials. Disposable Tyvek coveralls covering both the head and shoes shall be worn.

Containment of Each of the Contaminated Areas

Complete isolation of the work area using plastic (6 mil poly) sheeting sealed with tape. If a containment area blocks the only entrance, vacating the property is usually recommended during remediation. If the problem is widespread and the entire property needs remediation, no containment is necessary. This area should be large enough to house any contaminated materials Sealing with plastic sheeting (6 mil poly) all ventilation, ducts/grills, fixtures and other openings.

 Negative Pressure

Use an exhaust fan with a HEPA filter to generate negative pressurization (ventilating to the outdoors). Use the appropriately sized unit for the space. The air exchange rate must be six times per hour.

 HEPA Vacuum

Any area that is in the same area of contaminated materials should be HEPA vacuumed, starting at highest point and working down to the floor. Any area that is contained should be completely HEPA-Vac’d. This should be done before AND after removing contaminated materials. If the entire property is contaminated, the entire property needs to be HEPA-Vac’d.

Apply Antimicrobial

Apply antimicrobial to visible fungal growth prior to removal of material. Wait 10 minutes before removing the material. This provides sufficient time for the antimicrobial to paralyze microbial agents and reduces the dust generated because the material is wetted. This should be done before and after removing contaminated materials.

Removal and Discarding of Contaminated Materials

Remove infected drywall, insulation and building material least twelve inches past any visual mold. All debris should be double bagged in 3 mil contractor bags twisted, goose necked and sealed with duct tape. The sealed bags are to be wiped clean with the appropriate disinfectant in the containment before transport to the disposal area. There are no special requirements for the disposal of moldy material. Moldy materials that are bagged can be disposed of with other general waste. All contaminated materials should be wrapped in plastic and sealed with tape before being taken out of the containment area through the unaffected areas for disposal. Sometimes building material, furniture, flooring, etc. cannot be evaluated until it has been jarred from its location. For cases like this, the mold remediation company hired should be trusted to give an honest evaluation.

Restoring a Damaged Item

If an item such as kitchen cabinets, clothing, furniture, etc. were water damaged you should have a yes/no answer to whether or not your item can be restored. How this needs to be done is dependent upon the item in question. Wood may require sanding, clothes a simple rinse in the wash, etc. Some items like cabinets may appear to be salvageable, but after they are removed the damage is worse than anticipated. Trust the mold professional you hire for advice on whether or not something can be restored.

Final Cleaning

After the contaminated material has been removed, the contained area is to be HEPA vacuumed again. If any visual mold is seen on studs HEPA sand affected area. In the event that an item cannot be restored it must be replaced, even if it is building material. The contained area is to be wiped down with a biocide and/or detergent solution. The contained area is to be HEPA vacuumed again.


 Air Scrubber(s)

Multiple air scrubbers should be used for properties with a widespread problem and no containment area. How many should be a decision trusted in the hands of the mold remediation company hired. An Air Scrubber should be placed in each containment area for 48-72 hours.

Air Duct Cleaning

Every mold remediation should be completed with a thorough cleaning of the HVAC system and air ducts. Sanitize/Disinfect air handler coils. Sanitize/Disinfect all duct work.                                                                                                           

Final Inspections

Prior to containment removal and re-occupancy of the space a certified mold inspector should do a visual inspection and air sampling. Air sample should be taken both within the containment and in an adjacent area to ensure spores have not spread to other areas. After passing post remediation testing you may choose to apply a sealant around studs. Containment removal and re-occupancy shall occur when space passes appropriate verification testing.

Containment Used During Reconstruction

After the work area has passed clearance testing, the enclosure can be used to contain the dust generated by sheetrock sanding and taping activities. This is done to reduce the clean up when reconstruction is complete.

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