About 20 gallons of hydraulic oil were released in the water because of an incident at the South Timbalier 300A platform, according to a filing with the National Response Center dated Sept. 21.
A turbine shut because of a low oil level, which alerted operators, the filing showed. There was a turbine oil cooler leak, according to the filing.
“This was an isolated leak and has been stopped,” Kelly op de Weegh, a Shell spokeswoman, said in an e-mail that described the release as lube oil. “We are investigating the cause.”
Companies in the U.S. must notify the response center if they release hazardous substances in excess of reportable quantities, according to the Comprehensive Environmental Response, Compensation and Liability Act, commonly known as Superfund.
To contact the reporter on this story: Edward Klump in Houston at firstname.lastname@example.org
To contact the editor responsible for this story: Susan Warren at email@example.com