Built in the 1940s, the pipeline transports a form of natural gas that is an oily liquid, which is refined into fuel. Rodger Hunt, the owner of Power Run Oil, the Redondo Beach company that owns the line, did not return a phone call Tuesday. County officials said the liquid was not flammable, and its slight capacity to explode was quickly abated. The leak was one block outside of Gardena, in an unincorporated county area. The oily substance formed a pool about 12-feet wide last week, but remained close to the curb and did not affect traffic, said officials from Health Hazardous Materials Division of Los Angeles County Fire Department. Officials initially believed it was an oil leak, but eventually discovered it was natural gas from the same pipe that leaked about six months ago in that area, said a Health HazMat specialist, who asked not to be identified. “It was simmering like boiling water from the pressure,” the official said. “It came through as floating bubbles, but it dissipated. What remained was the condensate residue, the oily stuff.” Mike Duran of Gardena’s Public Works Department said the city helped with the cleanup by providing sand to soak up the liquid. An outside company later vacuumed it up. The leak seeped into soil surrounding the pipe and nearby storm drains, but did not reach the Dominguez Channel, said Greg Remick, spokesman for the state Office of Emergency Services. “There was no threat indicated to drinking water,” Remick said, adding that local agencies were able to contain and resolve the problem. County agencies oversaw companies that steam-cleaned the storm drains and removed contaminated soil under the street. There will be no long-term environmental effects from the leak, according to initial reports. On Tuesday, an area near Denker Avenue and El Segundo Boulevard was still blocked off. The street will not be repaired while the pipeline’s owner seeks county permits to stop using it altogether, a Health HazMat official said. Los Angeles County Public Works Road Maintenance officials will manage the street repair. [email protected] Staff writer Kristin S. Agostoni contributed to this article.160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! By Sandy Mazza STAFF WRITER A week after an underground pipeline leaked oil on a street near Gardena, officials are seeking permission to shut down the line. The pipe closed Sept. 11, prompting a large cleanup that lasted four days. It was the second time this year there was a leak at the location on El Segundo Boulevard.