On-site meeting participants are expected to conduct themselves in accordance with the Argonne's Code of Business Ethics and Conduct (https://www.anl.gov/argonne-code-of-business-ethics-and-conduct) as well as the ANL HEP Division code of conduct (see here).
You may report your concerns by contacting the hotline at +1 (877) 587-2449. More information can be found here.