Los Angeles has set an air quality standard of 110 ppb for ozone, but frequently the ozone levels actually measured are much higher. The concentrations of ozone in Los Angeles has been measured at 441 ppb. Los Angeles sits at an altitude of 7400 ft where the atmospheric pressure is only 0.67 atm. Calculate the partial pressure (in atm) of ozone at 441 ppb if the atmospheric pressure is 0.67 atm.