2012-10-01_REVISION - M1977284 ‎(9)‎

• Permit No: M1977284
• IBM Index Class Name: REVISION
• Doc Date: 10/1/2012
• Doc Name: AM-01 APPLICATION
• From: COTTER
• To: DRMS
• Type & Sequence: AM1
• Email Name: DMC
• Email Name: GRM
• Media Type: D
• Archive: No

Acid -Base Accounting Results
MJ WRP
JD- 8 -ROPC1
JD- 8 -ROPC2
AVERAGE ORE
Acid Potential (AGP) (t/kt)
4
4
7
5.5
Neutralization Potential (ANP) (t/kt)
53
61
71
66
Net Neutralizing Potential (NNP) (t/kt)
49
56
64
60
ANP /AGP ratio
13.3
15.3
10.1
12.7
Sulfur, HCl Extractable ( %)
0.18
0.04
0.08
0.06
Sulfur, HNO3 Extractable ( %)
0.13
0.10
0.13
0.115
Sulfur, Hot Water Extractable ( %)
0.37
0.68
0.64
0.66
Sulfur, Residual ( %)
<0.01
<0.01
<0.01
0.01
Sulfur, Total ( %)
0.69
0.82
0.86
0.84
Mineral Joe Mine Environmental Protection Plan 9
with NNP values between 0 and 20 and ANP /AGP ratios between 3 and 1 are indeterminate. Samples with
negative NNP values and ANP /AGP ratios below 1 are potentially acid generating (EPA, 1994).
The results of the ABA tests indicate that waste rock from the Mineral Joe Mine has a net neutralizing
(NNP) capacity of 49 t CaCO3/kt and an ANP /AGP ratio of 13.3 (Table 5). Based on these results, the
potential for material in the waste rock pile to generate acidic drainage is low.
The results of the ABA tests indicate that ore from the nearby JD -8 Mine has an average net neutralizing
(NNP) capacity of 66 t CaCO and an average ANP /AGP ratio of 12.7 (Table 5). The NNP of the tested
samples ranged from 56 to 64 t CaCO3 /kt while the ANP /AGP ratios ranged from 10.1 to 15.3. Based on
these surrogate results, the potential for material in the temporary ore storage pile at the Mineral Joe Mine
to generate acidic drainage is low.
The results of the February 2012 geochemical sampling of waste rock from the Mineral Joe Mine and the
December 2010 geochemical sampling of ore from the nearby JD -8 Mine indicate that no materials
classified as acid - forming exist on site.
Table 5. Acid -Base Accounting (ABA) Results for Representative Composite Samples
from the Mineral Joe Mine Waste Rock Pile and JD -8 Mine Ore Pile
5.3.3.3 Whole Rock Elemental Analysis and SPLP Testing Results
Geochemical testing performed on the composited samples also included whole rock elemental analysis
and synthetic precipitation leaching procedure (SPLP) testing.
Samples for whole rock elemental analysis were prepared using the cone - and - quarter method to generate
106- to 205 -gram splits (Table 4) from the Mineral Joe Mine waste rock. The split samples were crushed
in their entirety by Energy Laboratories and grab sample was taken from the pulverized blended sample for
the analytical split.
The samples were analyzed for 23 elements by inductively coupled plasma atomic emission spectrometry
(ICP -AES) and mass spectrometry (ICP -MS). An initial nitric acid (HNO and hydrogen peroxide (H
digestion (EPA method 3050B) was used to prepare samples for ICP -MS (EPA method 6020). ICP -AES
analysis (EPA method 6010B) required the addition of hydrochloric acid (HC1) to the initial digestate (EPA
method 3050B -M). EPA method 7471A, an aqua regia digestion with cold vapor atomic absorption
spectrometry was used for mercury. Sulfur species were determined using the Sobek Modified method.
Analytical results and laboratory reports for whole rock elemental analyses are presented in Table 6.
Elemental data indicate that the waste rock from the Mineral Joe Mine and ore from the nearby JD -8 Mine
are enriched in arsenic, cadmium, lead, molybdenum, selenium, uranium, and vanadium compared to world
shale averages and world sandstone averages (Rose et al., 1979). The ore and waste rock are deficient in
aluminum, barium, boron, chromium, copper, lithium, nickel, and iron compared to world shale averages
and deficient in aluminum, barium, boron, chromium, lithium, and iron compared to world shale averages
compared to world sandstone averages (Table 6). The ore and waste rock are enriched in arsenic,
4148B.120927 Whetstone Associates •