GENERAL32617

• Permit No: C1981020
• IBM Index Class Name: General Documents
• Doc Date: 9/7/1982
• Doc Name: PROPOSED DECISION AND FINDINGS OF COMPLIANCE
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

-14-
2) F1 ow measurerrents will be taken quarterly from site SW-1 and water
samples will be taken quarterly from sites SW-1, SW-4, and a new
monitoring site required in the Munger Canyon permit to be established
along East Salt Creek.
3) The water samples will be chemically analyzed for the parameters
specified below:
pH
Specific Conductance
Temperature (field)
Dissolved Oxygen (field)
Total Suspended Solids
Total Dissolved Solids
Total Combustible Solids
Total Hardness
Sodium Absorption
Ratio
Bicarbonate (HC03)
Magnesium (Mg+2)
Sodium (Na )
Sulfate (504)
Aluminum (A1)
Arsenic (AS)
Boron (B)
Cadmium (Cd)
Copper (Cu)
Iron (Fe)
bead (Pb)
Manganese (Mn)
Mercury (Hg)
Molybdenum (MO)
Selenium (Se)
4) The results of all monitoring will be submitted to the regulatory
authority within 30 days of data collection and analysis.
The operation is in compliance with the requirements of this section.
Sediment and Runoff Control
Information dealing with sediment and runoff control is presented in Sections
2.2.7, 2.3.I, 2.3.4, 2.3.5 of Volume I and Appendix A7 of Volume V of the permit
application. This information has been reviewed by the Division for compliance
with the Rules and Regulations and the resulting analysis is presented below.
The proposed pond at the mine bench is designed to hold a volume of runoff and
sediment of .95 acre-feet. This capacity allows for the storage of runoff
resulting from the 10-year, 24-hour storm event (.24 acre-feet), as we 11 as
storage of the sediment produced from the disturbance over a two-year period
(.2 acre-feet). The Division requires that a marker be installed in the pond
to indicate the 60o sediment storage Ievel (approximately the .12 acre-foot
sediment storage volume).
The collector ditch into the pond will be stable under the flow from the 10-year,
24-hour storm event. The emergency spillway is designed to convey flow from
the 25-year, 24-hour event without eroding. The design of the pond as presented
in the application does not include provisions for a dewatering device to
dewater the pond down to the maximum sediment storage level. This dewatering
device is required by the Division in the stipulation which follows.
The proposed sediment pond for the waste disposal pile is designed for a total
capacity of .185 acre-feet. This will allow for the detention of the volurre
of runoff fmm the IO-year, 24-hour event (.12 acre-feet) in addition to a
three-year accumulation of sediment from the disposal pile (.062 acre-feet).
A marker indicating the 60o sediment storage level must also be installed at
this pond.