OSHA officers can conduct unannounced inspections of workplaces to ensure compliance with health and safety standards. It is important for employers to always be prepared for inspections by designating representatives to greet the inspector, guide them, and provide any requested documents. When an inspection occurs, employers should verify the inspector's credentials, accompany them during walk-throughs, correct any identified violations immediately, and have a closing meeting to discuss findings. Fines for violations can be significant, ranging from $1,000-$500,000 depending on the type and severity of the violation. Employers should cooperate with inspectors and address any issues to avoid penalties.