That's a very good question.
When we do our analysis...and we do go out and verify certain sites, certainly higher-risk sites that we feel may approach Safety Code 6 limits. When we do our analysis, we take into account cumulative effects of other radio emitters in the area. Some of them we know about; baby monitors, typically, we wouldn't know about.
That is why we take a prudent approach, which is when it hits a certain level of Safety Code 6.... It depends on the situation, but for example, for, say, 20% of Safety Code 6, we actually go out and take measurements. Our calculations are very conservative and our measurements are always significantly lower.
And to the point--