Facilities are deep cleaned following contact with a Confirmed Covid-19 employee or patient. To determine appropriate areas to be cleaned a Contact Trace needs to be conducted to determine parts of the facility to be cleaned. After a facility is closed it is normally ventilated for at least 24 hours prior to deep cleaning. Thorough cleaning may be required before high-level disinfection because inorganic and organic materials that remain on surfaces interfere with the efficacy of disinfectants. Removal of foreign material from objects is normally accomplished using water with detergents or enzymatic products. Fugitive dust may also be removed by HEPA vacuuming prior to disinfection.
Methods of disinfectant application are critical. Fogging disinfection is not recommended by EPA or CDC. Electrostatic disinfection leaves space between droplets and doesn't completely cover surfaces and may dry out prior to adequate contact time. Hand sprayers can apply too much disinfectant without complete coverage and may require extensive post application wiping. Disinfection with mist applicators provides complete coverage, extended contact time to kill virsus, and requires shorter application periods saving time and money.
Hard non-porous surfaces that are frequently touched are cleaned and disinfected with appropriate disinfectants and appropriate contact time compatible with each surface. Areas that are cleaned include: tabletops, desks, hardbacked chairs, doorknobs, handles, light switches, phones, keyboards, touch screens, electronics, toilets, faucets, sinks, remote controls, alarm keypads, classrooms, lecture halls, offices, showers, locker rooms, etc.
For soft (porous) surfaces such as carpeting, rugs, and drapes, visible contamination is cleaned with HEPA vacuums, carpet and upholstery cleaners. Curtains, clothing, towels, and linens are laundered using the warmest water possible (194oF) and then completely dried.
OSHA permissible exposure limits for chlorine or other disinfectants are monitored prior to allowing deconed areas to be reoccupied