but the rest f the 95% of them where they're not gonna go out to tit look athno. . no, t're not w well-regulated. some of tm are real babad. i've se chls come out he literally, the side. it looked like the mountain was bleeding. they had--it loke a plateau. they had the pad here, and they hlike,he barrier fence around it, and there was just, like, this red, nasty water just coming, just oozing out the side of the mountain, just the side of the hill. right. >> but a tox chemicals is not the only wonent in frack wastewater. critics argue it could contain far more dangerous substances. >> these shale deposits are rich in radium, radium 226. the l lel ofofradium in n the marcelis taes the safe disposal at, meaning that 'o tere's alsso--there's anecdotal evidene that these frac fluids will leach uranium out of these shale dedeposits. there's also r radon in these shale depeposits. so in addition to the fracking fluid, which we know is toxic, the frac flowback leaches radium out of le. e shae radium is carcinogenic, and that's something g 's being introduced to the surfac