![eTool : Lead: Secondary Lead Smelter - Engineering Controls - Local Exhaust Ventilation Diagrams - Controls for Lead Tapping and Molding | Occupational Safety and Health Administration eTool : Lead: Secondary Lead Smelter - Engineering Controls - Local Exhaust Ventilation Diagrams - Controls for Lead Tapping and Molding | Occupational Safety and Health Administration](https://www.osha.gov/sites/default/files/inline-images/ingot_casting.gif)
eTool : Lead: Secondary Lead Smelter - Engineering Controls - Local Exhaust Ventilation Diagrams - Controls for Lead Tapping and Molding | Occupational Safety and Health Administration
![Figure 2.2 from Development of local exhaust ventilation (LEV) system performance test method and guideline for sustainable maintenance | Semantic Scholar Figure 2.2 from Development of local exhaust ventilation (LEV) system performance test method and guideline for sustainable maintenance | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/8087141368891cf604044cbc660b3dff41c94fe6/25-Figure2.2-1.png)
Figure 2.2 from Development of local exhaust ventilation (LEV) system performance test method and guideline for sustainable maintenance | Semantic Scholar
![ANSI/ASSP Z9.2-2018: Fundamentals Governing the Design and Operation of Local Exhaust Ventilation (LEV) Systems - ANSI Blog ANSI/ASSP Z9.2-2018: Fundamentals Governing the Design and Operation of Local Exhaust Ventilation (LEV) Systems - ANSI Blog](https://blog.ansi.org/wp-content/uploads/2018/08/Large-Ducting-Pipes-in-Factory.jpg)