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1. Aboutplants · 1789642045 · focus · HN ↗

   Underground Natural Gas storage is handled the exact same way interestingly enough

   <a href="https:&#x2F;&#x2F;www.phmsa.dot.gov&#x2F;technical-resources&#x2F;pipeline&#x2F;underground-natural-gas-storage&#x2F;fact-sheet-underground-natural-gas" rel="nofollow">https:&#x2F;&#x2F;www.phmsa.dot.gov&#x2F;technical-resources&#x2F;pipeline&#x2F;under...

   1. adolph · 1789664233 · focus · HN ↗

      In the S&amp;P article linked by another comment, there is an interesting note about storing other materials:

        The [Early Storage Reserve] caverns at the Bryan Mound site were originally used by Dow Chemical to store magnesium. 
      

      <a href="https:&#x2F;&#x2F;www.spglobal.com&#x2F;energy&#x2F;en&#x2F;news-research&#x2F;blog&#x2F;crude-oil&#x2F;061516-a-rare-tour-of-the-strategic-petroleum-reserve" rel="nofollow">https:&#x2F;&#x2F;www.spglobal.com&#x2F;energy&#x2F;en&#x2F;news-research&#x2F;blog&#x2F;crude-...

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