Chrys,
Unfortunately I do not believe they will include this because the detailed studies that were done to add this screening did not include radon, only smoking. That is why the specific ages and pack years are included as those are the only ones that showed decrease in mortality.
One option might be to try to add something about radon levels in the research area to get some new data which could justify adding radon to future screenings.
This Task Force is extremely data driven and without data on specific interventions, they will not recommend.