David Pettit, an air quality attorney for Natural Resources Defense Council, said concerns over air pollution from the winter gas could arise if California experiences an October heat wave.
"But right now, I don't have any great concerns about it, based on average temperatures in the past in October," he said.
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Jason Dearen can be reached at http://www.twitter.com/JHDearen . Associated Press writers Christopher Weber in Los Angeles and Juliet Williams in Sacramento, and Business Writer Marcy Gordon in Washington contributed to this report.
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