That these minor details are left out of an Environmental assessment is criminal
Isn't there a map of where the gas wells Musk plans to use in Chapter 4? That looks a lot closer than 70 miles. I believe the statement is made in the PEA that a well which is "unproductive" or uneconomical for the gas industry is useful for SpaceX due to considerably different economics.
From the PEA (pg6, pdf pg 15):
The scoping comment period was open through January 22, 2021. A total of 321 comments were received between December 22, 2020 and January 26, 2021. Concerns raised by commenters about the project included the following:
⚫ Safety of launch operations given the proximity to nearby liquified natural gas facilities.....
Is there a liquid natural gas facility near SpaceX or are they talking about SpaceX's own proposed natural gas facilities? If there is a non-SpaceX facility nearby, perhaps they are also planning to pre-treat gas obtained from there as well? If Rocket fuel needs de-ethanized beyond typical "over the counter" gas, then a SpaceX plant is reasonable as purified methane presumably costs more than the standard mix.