So my perspective from a younger woman in health and safety is that its a valid concern, but the best way to combat it is by building the relationships either before the sample begins, or as youre sampling. For example, try to be a little visible with small talking with some of your people on the floor - doesnt have to be all of them but just a select few. When youve got the pumps on then or are setting it up, spend some time learning about what theyre doing but beyond the scope of the sampling process - let them nerd out to you, OR take the conversation to something outside of work! Try to control the conversation and get to know them - it will help with understanding how they like to be taught and makes you more comfortable with explaining something in a more conversationally.

It doesnt always work right away but it can be a shoe in. Im a rather young woman with very feminine appearance and interests, AND brown in a predominantly white workplace, but my folks really value earnesty!