After thousands were affected in the colossal natural gas leak at Porter Ranch, Evaluair is opening its services to families affected by the public nuisance created by Southern California Gas Company. Sen. Barbara Boxer visited Porter Ranch and called for an independent air study to be done. Media reports that the leak is "the most significant public nuisance" Southern California has experienced. SoCalGas pleaded not guilty to misdemeanor charges involving reporting of the leak to authorities and discharging contaminants into the air. Specifically, Southern California Gas Co. is fighting a state rule requiring it to report how much methane and other chemicals were released. SoCalGas's depository, 115 defunct oil wells were used as an underground warehouse to hold 80 billion cubic feet of natural gas, the undisputed source of the leak.