Laserfiche WebLink
1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />CRAPTERFOUR Environme~a~ consequences <br />Parachute Site <br />TABLE 4.5-4 <br />SUMMARY OF PARACHUTE CUMULATIVE <br />AIR QUALITY STANDARDS ANALYSIS <br />..::.::::.::::::::.::::::::.::::::.::- ::: :.:::::: :::-::.:'PM.-...,:<:: '::!:;?Pikl' ::.:: ::::?::'I!tt):.:;. ,.; CD.:::;::';':'' ,''::"fro' <br />PallataatdParainteter:.!:;; ':: :Z~>ltour;...; ::.::"Agana :::::::: :::::Artn..tial: `::: .:'::;1~Hotuc;.:'.:::: ::::::::S=Hovx...::;.: <br /> <br />Maximum Modeled 20.6 5.6 11.9 1 954 608 <br />Cumulative Concentration <br />Ambient Background 39 l0 10.0 1,144 1,144 <br />Concentration <br />Total Concentration 59.6 15.6 21.9 3,098 1,752 <br />CAAQS/NAAQS 150° ~0 100 40,000 10,000 <br />Concentration <br />Percent of Applicable 39.7 31.2 21.9 7.7 17.5 <br />CAAQS/NAAQS <br />° The "highest-second-high" design concentration from the model has been compazed to the 24-hour PM~o <br />standard, even though the 99'" percentile format of the standard could allow for the use of the "highest-fourth- <br />high" concentration. <br />Source: RTP 1998b <br />Comparison to the PSD Class I Increments <br />Piceance and Parachute Sites <br />Prevention of Significant Deterioration establishes increments for National Parks and Wildemess <br />Areas referred to as Class I areas. The Class I increment is the maximum level of additional <br />degradation [hat is allowed to occur within the Class I area. The established increment, and the <br />value established to represent significant impacts for NOZ and PMto are presented below: <br /> <br /> <br /> <br /> <br />:....:... <br />'Pall.atatit!#!ar iaefer' ': <br />R ;. :;:::.::.::;:-:.:::;::.' <br /> <br />2d-ItDDI`..... ` :::::::::..:.:::..:..:::.: <br /> <br />Anneal.... :::::::.::......;..,::.-. <br /> <br />::::::. DaI...:::::;: <br /> <br />....Ann <br /> ,,t <br />PSD Class I Increment Concentration 8 4 2.5 <br />PSD Significant Impact Level 5 1 1 <br />New Source Review (NSR) proposed 0.3 :2 0.1 <br />Significance level <br />The neazest Class I area to the Yankee Gulch Project is the Flat Tops Wilderness Area (67 kmt40 <br />mi.), managed by the USFS. At a meeting held on November 10, 1998 with representatives of <br />the USFS to discuss the Class I issues and impact analysis procedures, the following items were <br />decided: <br />Meteorology and Air Quality 4-25 <br />