jagucki: we were glad when we found the oriskany sandstone. that provides a good potential target for us to do our experiment. and it's deep below ground surface. it's over a mile down. it's well contained. it's got thousands of feet of shale above it that form a very good containment layer. narrator: additional tests are done. well logging measures fluid levels that act as a proxy of porosity in the rock, indicating layers of porous sandstone and nonporous shale. and core samples are compared to previous examples taken over decades from ohio geological surveys lab. this data will provide the exact depth and characteristics of the rock layers. once these evaluations are complete the rock will be tested by injecting about two days' worth of plant co2 emissions and monitoring whether any of it is leaking up to the surface. if this technology proves feasible and economically viable, then carbon sequestration holds great promise as being part of the solution to continue to provide affordable energy without contributing to climate change. dr. gupta