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<br /> <br /> <br />c . " ' .. <br />,~'--~~,-""","-,---,.,--, <br /> <br /> <br /> <br />vc.ZT <br /> <br />Division: Air Pollution Control Divisiou <br />James M. Lents) Director <br /> <br />H. HAZARDOUS ANU TOXIC AIR POLLUTANT EXPOSURE <br /> <br />'rtte Colorado Air Pollution Control Division makes a distinction between hazardous and toxic air pollutants. A hazardous air pollutant: is <br />defined as causing an increase in mortality or au increase in serious irreversible or incapacitating illness. Toxic air pollutants are <br />distinguished by the fact that while sbort-tera bursts may have i..edlate deleterious effects, reaoval of the offending substance will allow <br />for a reversal of tbose effects. <br /> <br />Section 112 of the Clean Air Act directs the EPA to list and establish e1l1ss1ons standards for hazardous air pollutants. So far, standards <br />have been developed for arsenic, asbestos, benzene, beryilium, mercury, radioauc1ides) and v1nyl chloride. <br /> <br />'Jhe special concern for carcinogenic air pollutants has been heightened by the increasing awareness of the importance of environmental factora <br />in the development of cancer ~ Because of the magnitude of the cancer- problem in the U..S.) even a aaall direct relationship to aJ:rborne <br />pollutants can have a significant effect on the population. Cancer indUCing exposures to small amounts of airborne carcinogens aay not appear <br />for 10 to 40 years. <br /> <br />In addition to concern over the direct effects of toxic air pollutants. a ~ber of indirect adverse consequences can resulte from ac.ospber1e <br />transformation and removal ~f air pollutants from the atmosphere to other media. For example, a uUlIber of chlorinated organics are transfor.ed <br />by photochemical reactions into phosgene. Other halogenated organic chea1cals may deplete stratospheric ozone, posing an increased risk of <br />skin cancer. <br /> <br />Colorado regulates hazardous pollutants under Co_ission Regulation Noo 8. Presently. standards have heen adopted for asbestos) berylliua. <br />mercury, and vinyl chloride. Policy has also been established for dealing with hazardous and toxic pollutants during the perDdt process.. <br /> <br />-26- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />.. <br /> <br />- <br /> <br />.. <br />