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<br />0f721 <br /> <br />Division: Air Pollution Control Division <br />James K. Lents, Director <br /> <br />INTERVENTION STRATEGIES: <br /> <br />1 Carbon monoxide intervention strategy - In Denver there is estimated 420.000 person/days exposure to levels of carbon monoxide that exceeds 8-hours <br />federal primary health standards of 9.0 ppt. 1b.ls pollutant Is emitted from automobile usage. automobile characteristics. open burning. residential <br />space heating, snd unique meteorological characteristics. Contributing factors which Impact on the direct causes oJ: population exposure to <br />excessive levels of carbon monoxide which are technically and real1stica11y luterv~ble include: (1) level of control of stationary sources; (2) <br />fuel usage as production rate; (3) automobile speed and numbers. (4) autOJlOtlve emissions control technology; and (5) ability to forecast pollution <br />episodes. If these causes are each addressed through available' technology J then exposure of carbon isonoxide will decline from 42OJOOO <br />person/exposure days to 210,000 person/exposure days in Denver and in a sillUar porportion in such areas as Ft. Co11iusJ GreeleYJ and Colorado <br />Springs by June 30, 1985. <br /> <br />2 Ozone exposure intervention strategy - In the Denver area on days when ozone exceeds federa1 standards au area of 270 sq. mi. is affected. Althouab <br />ozone is not directly emitted froll any source automobile operation characteristlcsJ automobile usageJ major aud .inor sources of oxides of nitrogen <br />and volatile organic compounds emit pollutants that react to fora ozone in the 8taospbere. Contributing factors wb1ch impact on the direct causes <br />of population exposure to excessive levels of ozone which are technically and realistically Intervenable include: (1) leve1 of control on <br />stationary sources; (2) fuel usage as production rate; (J) automobile speed and numbers; and (4) automotIve emission control technology. If each of <br />these causes are addressed through available technology, then exposure to ozone will decline froa 270 sq. at. to (est.. ,not available at this tlae) <br />sq mi. by June 30, 1985. <br /> <br />3. Sulfur dioxide (Sl>2) and nitrogen dioxide (N0;2> exposure intervention strategy - Throughout the state of Colorado there are no areas that <br />currently exceed federal primary health or secondary welfare standards for S~ aad H02.. Sources of sulfur dioxide and nitrogen dioxide in the <br />atmosphere are major and tlliDor stationary sourcesJ automobile engine cOllbustlon ebaracteristicsJ and automobile usage patterns. Contributing <br />factors which impact on the direct causes of population exposure to excessive levels of sulfur and Bitrogen dioxide which are technically and <br />realistically intervenable include: (I) level of control on stationary sources; (2) fuel usage or production rate; (3) vehicular speed and nu.bera; <br />and (4) automotive eDdssion control technology. It eacb of tbese causes are addressed through available teclmology then exposure to unhealthful <br />atmospheric levels of these pollutant will be maintained at zero through June 30. 1985. <br /> <br />4. Lead (Ph) exposure intervent:lon strategy - 'l'broughout Colorado there are no areas that currently exceed federal health standards. Sources ~f lead <br />in the atmosphere include Ill8jor and minor stationary sources. automobile engine combustion, and automobile usage patterns. Contrlbut1na factors <br />which impact on the direct causes of population exposure to excessive levels of lead (Pb) which are tecbn1ca1ly and realistically intervenable <br />include: (I) level of control on stationary sources; (2) fuel usage or production rate: (3) vehicular speed and numbers; (4) fleet distribution; (5) <br />availability of leaded fuel; and (6) fuel switching rate. If these causes are addressed through available technology the exposure to unhealthful <br />levels of lead will be maintained at zero through June 30, 19850 <br /> <br />5. particulate matter exposure intervention strategy - There are several areas in Colorado that have ablosphere levels of particulate 'that exceeds <br />federal health standards. In Denver an area of approximately 75 sq. miles exceeds annual primary health standards. '!'be causes of particulate <br />emissions are major and minor stationary sourcea. residential space heatingJ open burn1naJ fugit:lve eatssions frOll various sources, automobile <br />travel, and automobile engine combustion characteristics. Cont.r:lbutlng .factors which impact on the direct causes of population exposure to <br />excessive levels of particulate matter which are techn1cal1y and realistically lntervenable include: (1) level of cont.rol on stationary sources; (2) <br />fuel usage on production rate; (3) vehicular speed and numbers (4) vehicular type (diesel or gasoline powered); and (5) engine ea1ssion control <br />technology. <br /> <br />-42- <br /> <br />- <br /> <br />- <br /> <br />-'-.. <br /> <br />--- <br /> <br />- <br /> <br />- -.".>.~,._-" <br /> <br />-..... .-..-:. <br />, . ._,,- ,." . . ~. -' .' ,,'. -, <br />