The oil rig leak is not underwater , energy company Total says . Total deployed the rig in the North Sea after the leak Sunday . Experts are unsure whether leak will stop on its own , or if it is needed . A union representing workers on the rig warned Wednesday that there was an `` urgent need '' to stop the leak . ` Initial fears of an explosion may be unfounded , an oceanographer says .
The oil rig leak is not underwater , energy company Total says . Total deployed the rig in the North Sea after the leak Sunday . Experts are unsure whether leak will stop on its own , or if it is needed . Initial fears of an explosion may be unfounded , an oceanographer says .