On Wednesday, Merck reported a spill of 1,521 gallons of diesel oil in the northern Alabama town of Lake Okeechobee.
The company said the spill occurred on the Okeekah River and had no immediate impact on the water supply.
The spill has been attributed to a pipeline break in the nearby communities of Shiloh, Tarrant and Pinehurst.
Merck has said it will investigate the cause of the spill.
The news comes just weeks after the release of the results of an investigation by a state agency that concluded that Merck had violated the federal Clean Water Act by leaking diesel and dispersing other pollutants into the air.
The state Department of Environmental Quality said the pipeline had been approved by a federal judge for transporting fuel oil and other fuel products.
EPA administrator Scott Pruitt told reporters at the time that the agency had determined that Merks conduct had violated federal environmental laws.
EPA officials said Merck’s actions had been “significant” and that the spill had affected more than 400 acres of property.
Mercks chief executive officer Brian Merck said Wednesday the spill was caused by a break in a pipeline that led to a leak of fuel oil.
The leak was discovered on Thursday, and the company has not determined what caused it, he said.
“The pipeline has been inspected and we’ve been cooperating with the regulators,” Merck told reporters.
Merks Chief Executive Officer Brian Merks said the company would conduct a thorough investigation of the leak.
Merk said he had no idea why the company had to conduct a spill investigation and that he and his team would take “immediate action” to address the problem.
Merchons own subsidiary, Marathon Oil, also reported a large spill in the same area.
Marathon Oil said Thursday that the amount of diesel and other heavy oil released by the leak was 1,000 barrels.
A pipeline rupture in the area on Friday could also have caused a spill, but there is no immediate indication that the pipeline broke.
A spokesperson for Marathon Oil declined to comment.
Merke’s comments come just weeks before the release in the federal courts of an independent investigation by the EPA that found that Mercks conduct had broken federal environmental rules.
The federal judge, who issued a decision late Wednesday that Merk violated federal laws, said that Merkes conduct had endangered the health and safety of people downstream, including those who were working to treat and treat people downstream from the pipeline.
Merkes chief executive Officer Brian Marke, who has called the pipeline spill a “massive environmental disaster,” said Thursday he was “devastated” that the investigation had been released so early.
Merkel said Thursday in a statement that the company will cooperate fully with the EPA investigation.
He said that the EPA’s investigation was “an honest and thorough effort to understand how the company could have done this” and “not blame the company for what happened.”
EPA officials have said that after the spill, the company temporarily shut down the pipeline and the state has taken steps to clean up contaminated areas.
The EPA said that in response to the spill Merck was “conducting a review of how we can better protect the environment and the people downstream,” including working with local governments to address any issues.