2012-10-01_REVISION - M1977305 ‎(16)‎

• Permit No: M1977305
• IBM Index Class Name: REVISION
• Doc Date: 10/1/2012
• Doc Name: EPP Submittal- Part 2, Ex. Q to QA/QC Summary.
• From: Cotter Corp.
• To: DRMS
• Type & Sequence: AM1
• Media Type: D
• Archive: No

Constituent
SPLP
Laboratory
results
Federal
MCL
Federal
Secondary
Standards
Colorado
Standards for
Groundwater
Colorado
Agriculture
Guidelines
Fluoride
0.2 mg /I
2.0 mg /I
4.0 mg /I
2 mg /I
Sulfate
14 mg /I
250 mg/I
250 mg /I
TDS
114 mg /I
500 mg/I
pH
9.92
Aluminum
4.5 mg /I
0.05 -0.2
mg /I
5 mg /I
Arsenic
0.002 mg /I
0.010 mg /I
0.01 mg /I
0.1 mg /I
Molybdenum
ND
0.035 mg /I
Selenium
ND
0.050 mg /I
0.05 mg /I
Uranium
0.0014 mg /I
0.030 mg /I
0.03 mg /I
Vanadium
0.04 mg /I
0.1 mg /I
Zinc
0.03 mg /I
2 mg /I
Gross Alpha
5.0 pCi /I
15 pCi /I
15 pCi /I
Radium 226
0.72 pCi /I
5 pCi /I
(14) Geochemical Data and Analysis
This section discusses the results of the SPLP tests to measure the concentration of
uranium - related constituents leaching from waste rock stockpiles. Once mining resumes
at LP -21, representative ore samples will be submitted for SPLP testing and the results
reported to the DRMS. Besides uranium and vanadium, there are several constituents
that are commonly associated with these types of mineral deposits. These constituents
include arsenic, molybdenum, selenium, and at some sites radium. While most of these
constituents occur naturally in the environment, their association with mining operations
and potential for migration in the environment is examined.
Analytical results from the SPLP tests are compared with the appropriate federal and
state water quality regulations and guidelines. These regulations include the Safe
Drinking Water Act, National Secondary Drinking Water Standards (not federally
enforceable), State of Colorado Basic Standards for Groundwater (5 CCR 1002 -41), and
Colorado Agricultural Standards.
14.1 Results of SPLP Tests
Laboratory SPLP results for chemical constituents of interest are presented in Table 3
along with applicable water quality standards and guidelines.
Table 3: Constituents of Concern from the LP -21 Waste Rock Stockpile
The only constituent above federal or state standards or guidelines is aluminum that
exceeds Federal Secondary Standards. The main environmental issue concerning
aluminum is potential toxicity to aquatic organisms. The EPA guidelines are for the pH
O'Connor Design Group Inc.
U- 19