The images also show funnels. But, there is a difference in the funnel design from that shown previously. This design difference may allow for the funnel to be viewed as an appropriate container closure.
- Exhibit A is a funnel with a stop-cock valve. When the blue knob is perpendicular to the valve, it is closed. When it is parallel (straight up-and-down), it is open. If the lab is not actively filling the bottle, the stop-cock must be closed. If it is open, ask lab staff why as it may be off-gassing. If it is off-gassing, determine how long that will take and advise them to close the container. Caps that vent are commercially available. Otherwise, close the valve, verbally remind lab staff to keep the valve closed, and cite this checklist item.
- Exhibit B shows funnel-cap assemblies that have a snap lock, red top. Some also have stop-cock valves. For the funnel to be considered an adequate closure, the snap lock top must be securely fastened or the stop-cock valve securely shut. If not, then this checklist item should be cited and the lab staff informed of the situation with instruction to close the container promptly.
The bottom line is that the lid must prevent the waste from spilling if the container is tipped over.