PERMFILE44241

• Permit No: M2007044
• IBM Index Class Name: Permit File
• Doc Date: 11/13/2007
• Doc Name: Proposed air permit
• From: Energy Fuels Resources Corp.
• To: Air Pollution Control Division
• Media Type: D
• Archive: No

TABLE 4.1
ENERGY FUELS RESOURCES CORPORATION -WHIRLWIND MINE
WASTE DUMP EMISSIONS -CRITERIA POLLUTANTS
Emission Equations: E~<= EP * SAµa * k (summed over N periods)
u =0.1*u~,
+ + * )
u , = u ,o (u,/u,
u~,o = u~ * (In(10/0.005)4n(h/0.005))
Data: Hwo=
Anger _
He=
Anga =
Wwo =
SV =
k=
N=
u, _
u,/u, = 0.2
Where: E~<= uncontrolled particle emissions (grams/year)
EP=pile erosion potential (grams/mZ)
k =aerodynamic Particle Size Multiplier (dimensionless)
N =number of pile disturbances in one year (disturbances/yeaz)
u~ =fastest mile wind speed for the periods between disturbances (m/s)
u, =threshold velocity (m/s) found in AP-42, Table 13.2.5-2
u~,o =corrected fastest mile wind speed (m/s)
u,/u,= ratio of surface wind speed to approach wind speed (unitless)
u~, =surface wind speed distribution
u* =equivalent friction velocity (m/s)
h =anemometer height (m)
30 ft
3:1
Oft
1.5:1
400 ft
20 ft'/[on
0.5
1.0
250 disturbances/year
1.33 m/s
1.1
u* = varies m/s
h = 10.7 m
OD = 250 day/yr
OH = 16 hr/day
Daily Surface Area Disturbance
[specific volume of waste rock]
[particle size multiplier for PM,o, based on AP-42, Section 13.2.5]
[particle size multiplier for PM~o, based on AP-42, Section 13.2.5]
[piles will be disturbed once per operating day]
[assumed threshold friction velocity for scoria, AP-4
[varies for different regimes of the stockpile, based on
AP-42, Section 13.2.5]
[fastest mile (maximum 2-minute) wind speed at Grand Junction
Walker Field Airport, varies daily]
[anemometer height a[ Walker Field Airport]
[operating days per year]
[operating hours per day]
P L W t SA, SAr SAwn
Description
(tons)
(ft)
(R)
(ft)
Ita
ft~
R' m~
Waste Dump 550 95 400 0.25 320 37947 38267 3555