The dangers of propane are that it is heavier than air. If a tank leaks propane the vapors will hang in the lowest portion of the tunnel. Some tunnels actually are lower in the center. Gas fumes actually escape easier than propane. This is especially true of the older tunnels. Most newer tunnels are designed slightly higher in the center so vapors flow away and do not pool.
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2017 Gemini 23TR Ford chassis w/ power stroke 3.2
DW, Daughter and 2 dogs, Sofie (black lab/boxer) and Phoebe (schnoodle)
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