A truck carrying cuttings from a Pennsylvania fracking site was quarantined at a hazardous-waste landfill and sent back after its contents triggered a radiation alarm showing the load was emitting 96 microrem of radiation per hour; the landfill rejects waste with levels above 10 microrems. The radioactive material from a site in the Marcellus Shale formation was radium 226, a common contaminant from the decay of uranium-238 that tends to accumulate in bone and can ge ... Read more »