2008-05-29_PERMIT FILE - C1981019A ‎(4)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 5/29/2008
• Section_Exhibit Name: Rule 4 Performance Standards -ST
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
• 2. A-6 Well - Located in the Good Spring Creek alluvium, this site represents the condition up-gradient of
proposed and current mining activities.
3. North Good Spring Well - Located in the Good Spring Creek alluvium, this site represents the down-dip
condition below existing and proposed mining activities.
4. MT-95-02 - Located in the Taylor Creek alluvium, this site represents the down-dip condition below current
and proposed mining activities.
5. A-7 - Located in the West Fork of Good Spring Creek alluvium, this site represents a potential down-dip
condition below South Taylor mining activities.
6. A-8 - Located in the West Fork of Good Spring Creek alluvium, this site represents the condition up-gradient
of South Taylor mining activities.
uarterl Alluvial Ground Water Field Parameters
Temperature Water Level pH Electrical Conductivity
Ouarterlv Alluvial Ground Water Laboratorv Parameters.
pH Conductivity at
0 Total Dissolved Bicarbonate Calcium (Ca +2)
25
C Solids (HC03
Magnesium (Mg+2) Ammonia (NH3) Nitrate Phosphate (P04 Sodium (Na)
as P)
Sulfate (S04) Arsenic (As) Iron (Fe) Lead (Pb) Manganese (Mn)
Mercury (Hg) Selenium (Se) Zinc (Zn) Water Level
Prior to mining at Lower Wilson, the following three groundwater monitoring sites will be added to the
sampling schedule:
• 1. MW-95-01 - Located in the Wilson Creek alluvium, this site represents the upstream,
undisturbed background conditions of the alluvial aquifer.
2. MW-05-03 - Located in the Wilson Creek and unnamed drainage alluvium, this site
represents alluvial groundwater quality immediately downgradient from Lower Wilson.
3. MW-95-02 - Located in the Wilson Creek alluvium, this site represents the downgradient
conditions below Lower Wilson and the proposed haul road.
It is reasonable to expect potential future monitoring activities for the Lower Wilson locations to mirror
those for the existing operation as it pertains to frequency and specific parameters.
Groundwater. Fill Piezometers - The Streeter Draw piezometer and the Section 16 Fill piezometer will be
monitored annually for water levels. The West Pit Fill piezometer will be monitored quarterly for water
levels. After mining, two additional piezometers will be installed into the toes of East Taylor Fill and
West Taylor Fill as described in Exhibit 21 Item 1. These piezometers will be added to the monitoring
program.
4.05.14 - 4.05.18 Various Topics
These sections are addressed in the original permit and will not change with addition of the South
Taylor/Lower Wilson permit revision.
4.06 TOPSOIL
The topsoil removal, storage, and redistribution plan for the proposed disturbed area associated with the
. Lower Wilson and South Taylor mining areas will follow the procedures described in Section 4.06 of the
South Taylor/Lower Wilson - Rule 4, Page 19 Revision Date: 3/04/08
Revision No.: TR-70