Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
D&L Energy wants to conduct its own tests of the now-closed injection well in Mahoning County that has been linked to 13 earthquakes in the Youngstown area.
But the company needs state approval to conduct such tests, and the Ohio Department of Natural Resources has not yet approved such actions.
The state has imposed an indefinite moratorium on deep injection well drilling near the site.
The company wants to conduct its own independent analysis and seismic tests to prove that its injection well in Mahoning Township was not the cause of the earthquakes over the last 15 months.
It submitted a proposal to the state on Feb. 28 and is still awaiting a response.