We are providing these guidelines for cleaning and disinfecting common surfaces on project sites and offices to provide the safest possible work environment, protect people, and reduce the spread of the virus

  • The following cleaning and disinfecting protocol will serve as a guide for cleaning and disinfecting commonly touched surfaces, and shared areas. These areas include hoist, break/lunch areas, lunch tables, touch surfaces on a microwave, coffee machine, refrigerators, dishwashers, ice machines, and vending machines; turnstiles, handrails, buses for the transport of workers, doorknobs, mechanical (joysticks, controls, steering wheels) bathrooms, copy/fax machines, and all common areas.
    • Establish a formal procedure and responsibilities to accomplish and maintain these practices.
    • As every site is different, the project management staff should map out and specifically identify the target areas for cleaning at the specific project.
  • This cleaning and disinfection procedure is to be used for routine cleaning and disinfecting (this is NOT the protocol to follow when disinfecting for a known or suspended case of COVID-19). Cleaning and disinfecting should be performed on a regular basis to maintain routine cleaning of the above-mentioned areas. In the event of a suspected or confirmed case of COVID-19, a third-party environmental or specialty cleaning coordinator should be used.

Cleaning Solutions

  • Multi-surface cleaning products (Examples: Purell or Clorox Multi Surface Spray, etc.)
  • Soap and water

Disinfecting Solutions

  • Sodium hypochlorite (bleach) solution diluted with water
    • 5 tablespoons (1/3 cup) of bleach per gallon of water
    • 4 teaspoons bleach per quart of water

Required PPE for routine cleaning/disinfecting:

  • Nitrile gloves
  • N95 mask (minimum)
  • Safety Glasses
  • Optional routine cleaning protective clothing: Tyvek type coveralls or gowns
Note: The OSHA in a recent directive indicates that N95 (or equivalent) mask can be reused as long as it “maintains its structural and functional integrity and the filter material is not physically damaged or soiled”

Following cleaning procedure

  • After each stage of removing PPE, wash hands immediately with soap and water for at least 20 seconds.
  • Remove and dispose of gloves. Do not touch outside of gloves.
  • Remove N95 mask without touching outside or front. If it still maintains functionality, place it in a plastic bag for reuse and label who it belongs to. That person should maintain control over their own mask. Used masks should never be shared with another person.
  • Remove glasses and clean thoroughly with soap and water or alcohol-based wipe or cleaning solution.
  • Face goggle/face shield combo or full or half face respirator was worn, remove by loosening straps and do not touch the front of mask or face shield. Place in a designated receptacle for cleaning.
  • Discard all non-reusable PPE in trash receptacle.


  • Definitions
    • Competent Person- Contractor’s representative responsible for overseeing, clean up and disinfection activities
    • Final Quality Insurance Inspection- Inspection of the work area(s) to verify the thorough cleaning and application of disinfectant to high-touch surfaces.
  • Contractor Training:
    • Foreman and supervisory personnel shall have read and understood the general intent as well as specific recommendations of the guidance documents, cited herein, regarding proper/cleaning disinfection techniques.
  • Phasing and Sequence of Work:
    • Contractor/owner to shut down the supply and return air into the work area
    • Porous materials such as carpeting and cloth furniture shall be HEPA vacuumed.