If You Are Wondering Who Has the Records: Official Sources and Record Holders
This resource is built from official federal sources, and each one is used only for what its own text says.
OSHA's Worker Rights and Protections page states that a worker has the right to "report an injury or illness, and get copies of your medical records," to "review records of work-related injuries and illnesses," and to "see results of tests taken to find workplace hazards." The same page offers tools to check an employer's OSHA inspection history and to view OSHA investigations and inspections, along with injury, illness and fatality data.
OSHA's Hazard Communication page states that "all employers with hazardous chemicals in their workplaces must have labels and safety data sheets for their exposed workers, and train them to handle the chemicals appropriately."
If you worked at a site that handled highly hazardous chemicals, a federal rule known as process safety management, or PSM, may also apply. PSM is the federal standard at 29 C.F.R. § 1910.119, and it exists for "preventing or minimizing the consequences of catastrophic releases of toxic, reactive, flammable, or explosive chemicals." For a contract worker, one part of it can be directly relevant: under 29 C.F.R. § 1910.119(h)(2), the host employer "shall maintain a contract employee injury and illness log related to the contractor's work in process areas." Where a worksite is covered by PSM, that log is one record a claim may ask about.
Who holds each record matters as much as what the record says. The incident report, JSAs, permits, daily logs and maintenance records are generally held by the employer or the operator, and they are not automatically handed to an injured worker or a family. Medical records are held by the treating doctors and hospitals. Photos, messages and pay stubs are often already in the worker's own hands. For a family, this often means three separate stacks of records with three separate keepers, and the records that bear most on what the company knew are usually the ones not at home. Which of those can be reached, and how, is one of the questions an attorney can help sort out.