PERMFILE109661

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: LORENCITO CANYON MINE PERMIT REVISION
• Section_Exhibit Name: EXHIBIT 20 AIR EMISSIONS PERMIT
• Media Type: D
• Archive: No

• •Ab Prrndf.ladia®ailw lore~tmo Caaf GnOmD
Control of fugitive dust is accomplished by gravel on the roads and water the roads "as deeded"
on days when precipitation does not occur. These controls achieve a 50 petrxnt emissions
reduction for gravel roads, and a 25 percent emissions reduction for watering "as needed."
Daily Haul Ttvck Emissions
•
The annual emissions aze a function of the number of miles driven. Table 5 ntmman~rs the
calculation of haul truck mileage.
TABLE 5
LORENCTFO CANYON 11IINE
LORENCITO HAUL.TRUCS 11ffi.EAGE
(777C CATERPILLAR HAUL TRUCES - 85-TON COAL CAPACITY)
Mining Annual Average Average Miles/trip with Miles/trip Miles/day Miles
Operation Production Daily Trips/day full load - empty loaded /yeaz
(Tons) Production (tons/truck training returning to (empty)
(tons) capacity) operation to mining
oadout (miles) operation
Surface 780,000 3058.8 36 4.17 4.17 150.12 76,561.2
(150.12)
P-3 420,000 1647.1 20 4.17 4.17 83.4 42,534.0
(83.4)
R-1/R-2 324,000 1270.6 15 5.31 5.31 79.65 40,621.5
(79.65)
P-I/P-2 894,000 3505.9 42 3.04 3.04 127.68 65,116.8
(127.68)
Total 2,418,000 9482.4 113 Not 440.85 224,833.5
Applicable (440.85)
Loaded Haul Truck Daily Emissions
31.667 lb/VMT * 440.85 miles/day = 13960.40 ]bs/day (uncontrolled)
Controls: Gravel roads (50% efficiency) and watering "as needed" (25% efficiency)
Daily emissions = 13960.40 lbs. day * 0.25 =3490.10 Ibs/day (controlled)
Empty Haul Truck Daily Emissions
• 16.963 Ib/VMT * 440.85 miles/day = 7478.14 Ibs/day (uncontrolled)