2011-08-08_REVISION - M1977493 ‎(36)‎

• Permit No: M1977493
• IBM Index Class Name: REVISION
• Doc Date: 8/8/2011
• Doc Name: EPP- Water Quality Monitoring Plan.
• From: Climax Molybdenum
• To: DRMS
• Type & Sequence: TR18
• Media Type: D
• Archive: No

Analytical Parameter
Frequency
NPL (mg/L)
NPL Basis
Cadmium, dissolved
Quarterly
0.005
Table 1,
CBSG
Copper, dissolved
Quarterly
1.0
Table 2,
CBSG
Iron, dissolved
Quarterly
0.3
Table 2,
CBSG
Lead, dissolved
Quarterly
0.05
Table 1,
Analytical Parameter
Frequency
Cadmium, dissolved
Quarterly
Copper, dissolved
Quarterly
Iron, dissolved
Quarterly
Lead, dissolved
Quarterly
Manganese, dissolved
Quarterly
Molybdenum, dissolved
Quarterly
Zinc, dissolved
Quarterly
pH
Quarterly
Sulfate (SO4)
Quarterly
Total Dissolved Solids (TDS)
Quarterly
•
•
Water Quality Monitoring Plan Climax Molybdenum Company
Version: R1 Permit No. M- 1977 -493
NPLs for each parameter will be established, similar to the other POC wells, based upon a
review of the baseline data, with consideration of the CBSG as a guide.
In the event that ambient water quality data is considered for use in establishing NPLs for this
new well, an evaluation of the baseline dataset will be performed to assess its suitability for this
purpose. Although the resumption of mining operations is not expected to result in any
significant change in conditions upgradient of this location, especially during the baseline data
collection period, an upward trend in observed concentrations over the baseline period may
indicate a reason to evaluate potential contaminant sources and protection facilities in the lower
end of this Watershed and the appropriateness of this data to represent ambient baseline
conditions.
EPP — Appendix C
Table 4 -2 — EVMW -3 Analytical Parameter List
4.2.3 Tenmile Creek Watershed
The POC for the Tenmile Creek Watershed is GWM -2, a monitoring well located downgradient
of the permitted surface water discharge outfall. Although the CBSG for Domestic Use (Tables
1 and 2) may not be directly applicable to the groundwater in the Tenmile Creek Watershed,
they have been used as the basis for selecting numeric limits protective of groundwater.
Table 4 -3 lists the parameters to be measured and the applicable NPL. The methodology for
determining whether an analytical result exceeds the NPLs is discussed in Section 5.
Table 4 -3 — GWM -2 Numeric Protection Limits
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