"LOS ANGELES — The utility whose leaking natural gas well has driven thousands of Los Angeles residents from their homes acknowledged that it understated the number of times airborne levels of the cancer-causing chemical benzene have spiked during the crisis.

Southern California Gas Co. had been saying on its website and in emails to The Associated Press that just two air samples over the past three months showed elevated concentrations of the compound. But after the AP inquired about discrepancies in the data, SoCalGas admitted higher-than-normal readings had been found at least 14 times.

SoCalGas spokeswoman Kristine Lloyd said Thursday that it was "an oversight" that was being corrected. The utility continued to assert that the leak has posed no long-term risk to the public.

Public health officials have likewise said they do not expect any long-term health problems. But some outside experts insist the data is too thin to say that with any certainty. For one thing, it is unclear whether the benzene fumes persisted long enough to exceed state exposure limits."

Brian Melley and Ellen Knickmeyer report for the Associated Press January 15, 2016. [2]