2016-08-08_PERMIT FILE - C1981019A ‎(14)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 8/8/2016
• Doc Name: Performance Standards
• Section_Exhibit Name: Volume 15 Rule 4
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
1. Upper Collom Gulch (UCG) represents the water quality conditions in Collom Gulch upstream of the Collom
Lite mining area. No impact on flow or water quality at UCG is anticipated.
2. Lower Collom Gulch (LCG) represents the conditions in Collom Gulch downstream of mining impacts. No
impact on flow or water quality at UCG is anticipated.
3. Lower Little Collom Gulch (LLCG) represents the conditions in Little Collom Gulch downstream of all
mining disturbances. Because Little Collom Gulch is ephemeral, and the mining area extends nearly to the
headwaters, no upstream monitoring location can be established.
4. West Fork of Jubb Creek (WFJC) represents conditions in the Jubb Creek watershed adjacent to the mining
disturbance.
5. Confluence of Jubb Creek (CJC) represents the aggregate water quality in the Jubb Creek basin, downstream
of potential mining impact areas.
6. Lower Taylor Creek (LTC) represents the water quality conditions of Taylor Creek directly downstream of
the South Taylor mining area and immediately prior to the confluence with Wilson Creek and immediately
downstream of the Gossard Loadout.
7. Lower West Fork Good Spring Creek (LWFGSC) represents this tributary after potential impacts caused by
South Taylor mining.
8. East Fork Good Spring Creek (EFGSC) represents the upstream, undisturbed background condition of the
East Fork Good Spring Creek.
9. Upper West Fork Good Spring Creek (UWFGSC) represents the upstream, undisturbed background
condition of the West Fork Good Spring Creek.
10. New Upper Good Spring Creek (NUGSC) represents the water quality of Good Spring Creek downstream of
the confluence of the east and west forks of the creek and downstream of the South Taylor mining area.
11. Lower Good Spring Creek (LGSC) represents the water quality downstream of the South Taylor and existing
mining areas.
Ouarterly Surface Water Field Parameters
Temperature Flow I pH I Conductivity
Ouarterly Surface Water Laboratory Parameters
pH
Upper West
Total Dissolved
Total Suspended Solids
Surface
Fork Good
Quarterly
Flow from Parshall
Flow from Parshall Flume.
Water
Spring Creek
Sodium (Na+)
Flume. See List Below
See List Below
Iron - Total
UWFGSC 9
Manganese (Mn)
Selenium (Se)TDZinc
TD
(Zn)
Phosphorus (P)
New Upper
See List Below. Flow
See List Below. Flow
Surface
Good Spring
estimated by combining
estimated by combining
Water
Creek
Quarterly
measurements taken from
measurements taken from
NUGSC)10
= Total
LWFGSC & EFGSC.
LWFGSC & EFGSC.
Surface
Lower Good
Flow from Parshall
Flow from Parshall
Water
Spring Creek
Quarterly
Flume. See List Below
Flume.See List Below
LGSC
1. Upper Collom Gulch (UCG) represents the water quality conditions in Collom Gulch upstream of the Collom
Lite mining area. No impact on flow or water quality at UCG is anticipated.
2. Lower Collom Gulch (LCG) represents the conditions in Collom Gulch downstream of mining impacts. No
impact on flow or water quality at UCG is anticipated.
3. Lower Little Collom Gulch (LLCG) represents the conditions in Little Collom Gulch downstream of all
mining disturbances. Because Little Collom Gulch is ephemeral, and the mining area extends nearly to the
headwaters, no upstream monitoring location can be established.
4. West Fork of Jubb Creek (WFJC) represents conditions in the Jubb Creek watershed adjacent to the mining
disturbance.
5. Confluence of Jubb Creek (CJC) represents the aggregate water quality in the Jubb Creek basin, downstream
of potential mining impact areas.
6. Lower Taylor Creek (LTC) represents the water quality conditions of Taylor Creek directly downstream of
the South Taylor mining area and immediately prior to the confluence with Wilson Creek and immediately
downstream of the Gossard Loadout.
7. Lower West Fork Good Spring Creek (LWFGSC) represents this tributary after potential impacts caused by
South Taylor mining.
8. East Fork Good Spring Creek (EFGSC) represents the upstream, undisturbed background condition of the
East Fork Good Spring Creek.
9. Upper West Fork Good Spring Creek (UWFGSC) represents the upstream, undisturbed background
condition of the West Fork Good Spring Creek.
10. New Upper Good Spring Creek (NUGSC) represents the water quality of Good Spring Creek downstream of
the confluence of the east and west forks of the creek and downstream of the South Taylor mining area.
11. Lower Good Spring Creek (LGSC) represents the water quality downstream of the South Taylor and existing
mining areas.
Ouarterly Surface Water Field Parameters
Temperature Flow I pH I Conductivity
Ouarterly Surface Water Laboratory Parameters
pH
Conductivity @ 25°C
Total Dissolved
Total Suspended Solids
Solids
Calcium (Ca+)
Magnesium (Mg+)
Ammonia (NH3)
Nitrate -Nitrite
Sodium (Na+)
Sulfate (SO4)
Arsenic (As)
Iron - Total
Mercury (Hg)
Manganese (Mn)
Selenium (Se)TDZinc
TD
(Zn)
Phosphorus (P)
Lead (Pb)'FDBicarbonate
HCO3)D
D =
Dissolved
TD = Total Dissolved
T
= Total
TR = Total Recoverable
Collom — Rule 4, Page 8 Revision Date: 4/18/16
Revision No.: PR -04