BACK TO CATEGORIES Photo ID: 1431 (Click photo to view original size.) Category: Silica Hazard: An employee performing manual abrasive blasting with sand was overexposed to silica and was wearing an air purifying ¼ mask respirator, which is not sufficient protection. Also, no respiratory protection program had been implemented, including an exposure evaluation, medical evaluation, fit testing, and training. Standard Violated: 1910.94(a)(5)(ii)(b), 1910.94(a)(5)(iv), 1910.1000(c) Corrective Action: Aluminum oxide was substituted as a blasting agent. The employer conducted an exposure assessment and implemented a respiratory protection respiratory protection program. Description: The photo depicts an employee who was overexposed to silica during manual abrasive blasting with sand and was not provided sufficient respiratory protection.