Carbon Sequestration - 6 of 15
Carbon Sequestration FAQs - 15 Found
The minimum requirements for inclusion in the assessment included the following:
- The rock layer had to be below 3,000 feet, the level at which pressure is sufficient to keep CO2 in its liquid state.
- The rock layer had to have an impermeable seal to prevent the CO2 from escaping.
The rock layer could not be in an area of groundwater with less than 10,000 milligrams per liter of dissolved solids. Water sources such as those are considered protected freshwater by the U.S. Environmental Protection Agency. Under the terms of the 2007 Energy Independence and Security Act, which required USGS to follow EPA guidelines, fresh sources of groundwater could not be included in the assessment.