OSHA's new publication, #4045 - Guidance on Returning to Work, provides general principles for updating restrictions originally put in place to slow the spread of the coronavirus. During each phase of the reopening process, employers should continue to focus on strategies for basic hygiene, social distancing, identification and isolation of sick employees, workplace controls and flexibility, and employee training.
The document is available here: https://www.osha.gov/Publications/OSHA4045.pdf
According to OSHA, non-essential businesses should reopen as state and local governments lift stay-at-home or shelter-in-place orders and follow public health recommendations from the Centers for Disease Control and Prevention and other federal requirements or guidelines. Employers should continue to consider ways to use workplace flexibility, such as remote work and alternative business operations, to provide goods and services to customers.
OSHA recommends that employers continually monitor federal, state, and local government guidelines for updated information about ongoing community transmission and mitigation measures, as well as for evolving guidance on disinfection and other best practices for worker protection.
Further COVID-19 safety and health guidance is available on the OSHA COVID-19 webpage. https://www.osha.gov/SLTC/covid-19/