Methane levels at a multimillion-dollar Otay Ranch housing project dropped by more than 50 percent during a recent six-month period, according to a new report, but the source of the gas has yet to be found.
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Methane levels at a multimillion-dollar Otay Ranch housing project dropped by more than 50 percent during a recent six-month period, according to a new report, but the source of the gas has yet to be found.
