EPA Gives an Acceptable Limit on Radiation And it is a Low Limit
For more info, go to forum.solidsurfacealliance.org
This is one of the first stories we found on radiation levels in building materials, a story about floors being made with radioactive mine tailings.
The main point is that the EPA points out is that they would consider 10 to 14 uR/hr to be an acceptable level for cleaning up a high level radition area. In this case, the floor was around 800 to 1,000 uR/hr, about the same level of the Four Seasons granite slab we found and cut into samples for the scientists. We understand that Linda Kincade, a Certified Industrial Hygenist has also found a granite sample at 700 uR/hr, and of course the Tacoma slab that measured 1,030 uR/hr.
So it would seem that 10 to 14 uR/hr would also be the prefered level of a building material as well. There are some granite colors this low, but not a lot.
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