Lesson Learned Statement:Security companies that operate indoor firing ranges must ensure the ventilation system is operational during firearms training activities and that routine clean up of lead dust occurs.
Discussion:Airborne lead monitoring was conducted during semiannual Firearms Qualification for Security Police Officers. Results of the airborne lead monitoring showed airborne lead exposure levels above the Occupational Safety and Health Administration (OSHA) action level of 30 ug/m3.
Analysis:The indoor firing range ventilation system was not in operation during the training/monitoring period that the OSHA action level was exceeded. Procedures were not followed to ensure the ventilation system was operating during firearms training activities. Additional airborne lead monitoring was conducted with the ventilation system in operation. These results were lower than the previous levels, but still above the OSHA action level. Further action was taken to determine other contributing factors. A surface contamination assessment of the indoor firing range floor was conducted to determine lead dust levels. Results indicated a buildup of lead dust contamination due to lack of routine clean up. Procedures were not followed to ensure routine floor cleaning was performed to prevent lead dust accumulation. The indoor firing range floor was cleaned using a HEPA vacuum and additional surface swipe sampling as conducted afterward. Results of these samples showed a reduction of the lead dust accumulation on the floor. However, additional clean up with a more efficient HEPA vacuum should reduce this level even more. The floor of the indoor range is constructed of plywood which is a porous, difficult to clean material. The floor should also be sealed with polyurethane or epoxy coating to provide a smooth, easily cleanable surface. After the clean up, additional airborne lead monitoring was performed. Results showed airborne lead exposure levels below the OSHA action level.
Recommended Actions:Ensure the ventilation system is in operation during firearms training on an indoor firing range. All personnel must be informed of the importance of using the ventilation system during firearms training. Ensure routine clean up occurs to prevent the accumulation of lead dust in indoor firing ranges.
Lori A. Plummer
Validator:Deloy Martinez, Jr.
Contact:Deloy Martinez, Jr. (702) 295-6804
Name Of Authorized Derivative Classifier:Leo Price
Name Of Reviewing Official:Leo Price
Priority Descriptor:Blue / Information
Keywords:lead exposure, firearms training, indoor firing range
References:29 CFR 1910.1025, Lead; DOE Standard 1091-96, Firearms Safety
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DOE Function / Work Categories:Conduct of Operations - Work Planning
Occupational Safety & Health - General
ISM Category:Develop / Implement Controls
Hazard:Personal Injury / Exposure - Toxic Material
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