Oil and gas giant Exxon Mobil, which has enjoyed the support of Republican lawmakers for decades, is now facing new scrutiny after the Environmental Protection Agency said it could take action against its use of the chemical bromoembryonic antigen (BSE) in its products.

The agency said it was looking at “potential BSE contamination” in its oil spill response and other materials.

The EPA said it’s also looking into potential BSE-related contamination in products from three other companies, including BP, Exxon Mobil and Chevron.

The company, which owns or operates more than 200 companies worldwide, is one of the biggest and most profitable companies in the United States. 

Exxon Mobil is one a number of major companies that use BSE to produce certain chemicals in their products.

According to EPA data, BP, Chevron, and Exxon Mobil are the three largest BSE manufacturers.

Exxon Mobil’s use of BSE in its well treatment, oil recovery, and production processes was revealed in March 2015 when the Environmental Working Group (EWG) found the company using BSE.

In an earlier Environmental Protection Department report, the EPA said Exxon Mobil used BSE, which is found in oils such as kerosene, in well treatments and oil recovery processes in 2013.

The same chemical was also found in oil in the aftermath of Hurricane Sandy in 2012, but was never tested for contamination by the agency.

EPA said BSE was not tested for BSE as a “conventional crude oil solvent.”

ExxonMobil was the second largest Bse producer in 2016, according to EPA.

However, the Environmental Health Agency (EPA) said in April 2018 that BSE has “significant” health and safety concerns and that it should not be used in commercial operations.

The EHRA said it has reviewed and approved several products from ExxonMobil that were using Bse, including one product that contained bromobenzene.

The products also contained other chemicals such as hydrochloric acid and propylene glycol, and it’s possible that some products contain BSE that could be dangerous, the agency said.

The new findings come as Exxon Mobil is under scrutiny from federal regulators over the use of a BSE chemical that is used in the drilling process.

The Environmental Protection Protection Agency (EPPA) in June 2018 determined that a Bse chemical in Exxon Mobil equipment was not safe for use in hydraulic fracturing operations, and said that “the product should not have been approved.”

EPA said the chemical, known as benzene, is used to dissolve rock to release oil from wells.

At the time, EPA said that Exxon Mobil had not responded to the request for information and the agency could not provide the agency with the chemical.

EPA said it had not received a request from the EPA to investigate Bse contamination of Exxon Mobil products.

In a letter to Exxon Mobil dated September 18, 2018, EPRIA Commissioner Deborah Cox said the company had not provided a response to its request.

On September 25, 2018 EPRISA Commissioner Mark Hartl, a Republican, wrote to the EPA asking that the agency investigate the BSE problem.

The letter noted that the company has a history of using BSC as a solvent in its equipment, and also said that in 2015, it was the largest BSC manufacturer in the U.S. The companies’ use of benzene is a “significant threat to public health and the environment,” Hartl wrote.

According to EPRESA, there are two types of benzone compounds, benzene sulfonate and benzene bisulfonate.

The second compound is found only in some petroleum products, including the kerosane used in ExxonMobil’s well treatment process.

The benzone compound used in well treatment is the most toxic type, according the EPREA.

While the EPA’s report found that ExxonMobil used benzene in well processing and production, it did not identify the chemicals in its production process. 

BP has said it does not use BSC in any of its well treatments, and that the chemical is not used in any well treatment.

The BP statement said the benzone has been found in natural gas wells and is used as a surfactant.

Exposure to benzene can cause skin irritation, respiratory problems, and a skin cancer risk.

It is also known to cause birth defects, among other problems.