He can contact the federal Occupational Safety and Health Administration (OSHA) on a confidential basis and hope that this leads to inspection and enforcement to the benefit of the workers. The main number for complaints is 1-800-321-OSHA (6742). OSHA has a regional office in Andover, (978) 837-4460.
If your husband wants to brainstorm alternative scenarios that would result in his no longer being employed there, he should talk to an employment lawyer. You can find a referral through the Mass. Employment Lawyers Association, http://www.massnela.org/directory.htm.
Massachusetts Coalition For Occupational Safety And Health
1532B Dorchester Avenue | Dorchester, MA 02122 | (617) 825-SAFE (7233] | firstname.lastname@example.org
Disclaimer: This site exists to provide information only. It is not legal advice. Answering your question does not create an attorney-client relationship. I am a Massachusetts lawyer. Any information provided on this site does not, except as explicitly stated, imply familiarity with laws or procedures peculiar to your state which may differ from those where I practice.