Risk depends on the operation
NOM-005-STPS-1998 applies to Mexican workplaces where dangerous chemicals are handled, transported or stored. The official catalogue continues to list this edition as current. Its age does not justify ignoring it, but historical references need to be coordinated with later standards relevant to the hazard and activity.
The foundation is an updated study of potential risks. It considers the process, physical and toxicological properties, hazardous activities, areas and exposed people. Chemical storage organisation requires understanding how a release or contact could occur, not simply maintaining a list of products purchased.
Procedures and a specific programme
Employers must maintain handling, transport and storage procedures, identify containers and prepare a specific safety and hygiene programme. It brings together hazard information, housekeeping, quantities intended for production, personal protection and emergency response arrangements.
For example, moving from a small package to a tank can change exposure, spill potential and necessary controls. Reusing the former procedure without assessing the transfer omits the operation that has changed. Process and substance modifications need to trigger review of the risk study and arrangements.
Material preparation for incidents
The study determines needs for containment, showers and eyewash, hygiene and emergency care. The standard addresses trained first-aid personnel and resources appropriate to the hazards. Equipment without access, maintenance or prepared people does not ensure an effective response.
Selection of equipment and response methods depends on the particular product. Spill neutralisation should not be improvised, and one universal method should not be applied to incompatible substances. Workplace instructions need to specify when to restrict access and activate specialist assistance.
Authorisations and evidence
Hazardous activities requiring authorisation must be identified in writing. The authorisation connects the task, person, location, timing and responsible people with the applicable safe procedure. It is not an open approval for unrelated future interventions.
Training, risk communication, relevant medical surveillance and documented maintenance are also required. The standard does not replace specific rules on chemical exposure, hazard communication or confined spaces. Checking these interfaces prevents obsolete editions cited in the original text from being treated as the current requirements for a new operation.
