Hi Duchess of Toronto: Thanks so much for providing this information to Always Mom's post and our discussion board community. It looks like you have done some excellent research, and can provide lots of helpful information!
Here are some other helpful resources on:
Cleaning/Disinfecting: https://www.publichealthontario.ca/-/media/documents/ncov/factsheet-covid-19-environmental-cleaning.pdf?la=en
CDC Cleaning Guidelines (with suggestions for custodial staff): https://www.cdc.gov/coronavirus/2019-ncov/community/organizations/cleaning-disinfection.html
Hope this helps!