DRC-2012-001823 - 0901a06880304889

QRC^201E-001B23
RIO Aigom Mining LLC
August 29, 2012
Certified mail
Return Receipt (7010 1870 0000 3702 9672)
Mr. Rusty Lundberg, Director
Division of Radiation Control
Utah Departnnent of Environmental Quality
195 North 1950 West
PO Box 144850
Salt Lake City, UT 84114-4850
Re- License un 900481
Groundwater Stability Monitoring Report - l^* Half 2012
Dear Mr. Lundberg,
Please find attached Rio Algom Mining LLC's groundwater stability
monitoring report for the above referenced license for the l^^ half of 2012.
Two monitor wells had a status of Out of Compliance during the first half
of 2012 The two wells were Monitor Wells RL-1 and EF-8; both wells continued
to have reported uranium values that exceeded their respective target
action limits. The two monitor wells are being sampled monthly for uranium
analysis
If you have any questions or need additional information, please call
me at 505-287-8851 ext 15
Sincerely,
Chuck Wentz
Radiation Safety Officer
Environmental Department Supervisor
Attachment* As stated
cc P Goble (DRC)
DOE-GJO
PO Box218, Grants, NM USA 87020 - Tel [phone] - Fax [phone]

1

RIO ALGOM MINING LLC-LISBON OPERATION
Semiannual Groundwater Monitoring Report
1st Half 2012

Introduction:

This report meets the requirements of DRC License # UT 1900481, Condition 53, and presents
the monitoring results of the groundwater sampling required by the Long Term Surveillance
Monitoring Plan (LTSP). This report discusses the results obtained for Monitor Wells EF-8 and
RL-1 during the 1s half of 2012. The two wells have a status of Out-of Compliance and were
sampled monthly during the 1st half of 2012. Groundwater samples taken from the two wells
indicate uranium values continue to exceed the Uranium Target Action levels presented in Table
1 of license condition 53 B Those values are 0.03 mg/L U for EF-8 and 42.1 mg/L U for RL-1.

This report contains the following elements:

A discussion and interpretation of the groundwater sampling results and concentration
trends, Uranium Compliance limits or Uranium Target Action levels as stated in Table 1,
license condition 53 B.

Appendix 1 contains analytical data, time versus concentration plots, depth to water with
time, and hydrographs for each of the monitoring wells.

Appendix 2 presents the field data sheets including the field parameter measurements.

Appendix 3 presents copies of the laboratory analytical reports for the 1st half of 2012.

Appendix 4 presents the groundwater contour maps.

Appendix 5 contains the sampling methodologies used to conduct the sampling.

2

Discussion

The data provided in this report represent sampling results from the 1st half of 2012.

Monitor Wells EF-8 and RL-1 are two of the seven Trend Wells at the Lisbon mine site, as shown
in Table 1.

Table 1

Monitoring Well Network

Well Identification (s) Purpose
EF-3A, OWUT-9 POC wells (Point of Compliance)
MW-13, MW-5 Monitor background water quality
RL-4, RL-5, RL-6 POE wells (Point of Exposure)
EF-6, EF-8, ML-1, RL-1, RL-3, H-63,
LW-1 Trend wells

Trend wells EF-6, EF- 8, ML-1, RL-1, RL-3, H-63 and LW-1, located throughout the area to be
transferred to the Department of Energy, are used for validation of the transport model prediction
and trends. The constituent of concern for these wells is U-Nat as stated in Table 3 of license
condition 53 B. Table No. 2 shows the comparison of the uranium concentration found in monitor
wells EF-8 and RL-1 during the 1st half of 2012 with their corresponding Uranium Target Action
Levels.

Table 2

Uranium Concentrations – Trend Wells

Trend Well
Observed U-Nat
Concentration (mg/L)
Uranium Target Action
Levels (mg/L)

EF-8 (1-5-2012)
EF-8 (2-9-2012)
EF-8 (3-13-2012)
EF-8 (4-25-2012)
EF-8 (5-8-2012)
EF-8 (6-13-2012)

0.449
0.404
0.402
0.431
0.464
0.483

0.30
0.30
0.30
0.30
0.30
0.30

RL-1 (1-5-2012)
RL-1 (2-9-2012)
RL-1 (3-13-2012)
RL-1 (4-25-2012)
RL-1 (5-8-2012)
RL-1 (6-13-2012)

48.5
44.6
49.4
43.7
47.3
46.7

42.1
42.1
42.1
42.1
42.1
42.1

3

All uranium results presented in the above table represent an average of two sample results for
each date shown. The uranium results shown for Monitor Well EF-8, taken during the first half
of 2012, show an increasing trend in the uranium values. The results shown for Monitor Well RL-
1 for the first half of 2012 also show an increasing trend in uranium values. Monitor Wells RL-1
and EF-8 continue to exceed their respective Uranium Target Action Levels. As per License
Condition 53 C., both of these monitor wells continue to have an Out-of-Compliance status that
have triggered an ongoing Supplemental Site Assessment.

4

Appendix 1

The following data is provided for each of the 2 monitor wells.

Analytical Data
Time Versus Concentration Plots
Depth to Water and Hydrographs versus Time.

5

MONITOR WELL EF-8

DEPTH
TO WATER

WATER ELEVATION pH HCO3 Cl SO4 TDS As Mo Se U-Nat
DATE (feet) (MSL) (s.u.) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
24-Jan-90 56.73 6516 7.62 256 170 246 934
15-May-
90 59.15 6514 7.38 266 159 205 778
25-Jul-90 64.32 6509 7.24 263 162 188 922
10-Oct-90 67.08 6506 7.36 292 184 249 980
14-Feb-91 69.34 6504 7.52 275 175 222 876
25-Apr-91 70.71 6502 7.49 277 171 228 908
24-Jul-91 72.84 6500 7.46 304 187 277 1100
26-Dec-91 75.68 6497 7.5 342 191 379 1178
13-Feb-92 73.94 6499 7.51 360 180 358 1204
27-Apr-92 75.7 6497 7.52 315 201 296 1064
06-Aug-92 74.18 6499 7.6 278 174 235 906
04-Nov-92 74.06 6499 7.51 278 180 241 850
07-Mar-93 74.02 6499 7.45 285 175 238 880
14-Jun-93 72.54 6500 7.25 288 185 290 896
01-Jun-94 77.62 6495
01-Dec-94 79.06 6494
01-May-
95 80.34 6493
01-Oct-95 86.44 6487
01-Jun-96 87.94 6485
01-Oct-96 87.92 6485
01-May-
97 90.44 6483
01-Dec-97 94.06 6479
01-May-
98 92.3 6481
22-Jul-98 93 6480 7.22 556 570 196 1176 0.025 0.007 0.008 0.069
01-Dec-98 96.18 6477
01-Apr-99 92.46 6481
25-Apr-00 94.15 6479 7.49 230 34 102 728 0.031 0 0.004 0.021
01-May-
00 94.82 6478
01-Dec-00 96.95 6476
01-Mar-01 98.68 6474
01-Mar-01 104.68 6468
01-Oct-01 104.25 6469
11-Mar-03 107.07 6466 7.36 224 61 158 672 0.0281 0.0098 0.001 0.02
08-May-
03 107.68 6465 7.41 217 66 159 244 0.0284 0.0083 0.007 0.016
30-Jun-04 110.25 6463 6.93 254 339

0.03 0.009 0.07 0.025
16-Sep-04 111.45 6462 7.55 256 79

0.03 0.008 0.008 0.024
17-Dec-04 108.82 6464 7.57 268 101

0.0273 0.007 0.007 0.024

6

MONITOR WELL EF-8 (Cont)

DEPTH TO WATER

WATER ELEVATION pH HCO3 Cl SO4 TDS As Mo Se U-Nat
DATE (feet) (MSL) (s.u.) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
3-Mar-05 106.96 6466 7.74 264 203

0.0254 0.0074 0.0065 0.0215
22-Jun-05 105.74 6467 7.37 277 205

0.03 0.008 0.008 0.025
29-Sep-05 104.81 6468 7.12 222 97 240 720 0.0129 0.0078 0.008 0.0247
9-Nov-05 102.46 6471 7.42 275 97 274 684 0.03 0.007 0.008 0.03
23-Mar-06 100.6 6472 7.36 255 94 282 784 0.03 0.008 0.008 0.03
25-Sep-06 99.05 6474 7.2 267 103 241 742 0.0218 0.0078 0.006 0.0254
14-Dec-06 96.48 6477 7.41 262 97 239 748 0.028 0.0081 0.007 0.026
20-Mar-07 92.95 6480 7.66 229 95 237 722 0.025 ND 0.008 0.0305
11-Jun-07 92.2 6481 7.56 232 102 225 730 0.027 ND 0.008 0.0567
20-Aug-07 90.91 6482 7.26 242 96 236 758 0.026 ND 0.008 0.0563
25-Oct-07 89.35 6484 7.68 269 89 235 736 0.03 ND 0.008 0.0353
6-Jun-08 87.71 6485 7.71 257 101 247 772 0.031 ND 0.008 0.0631
15-Oct-08 83.99 6489 7.58 268 108 246 798 0.03 ND 0.009 0.0768
25-Mar-09 82.39 6491 7.71 283 116 249 813 0.034 ND 0.009 0.105
12-Aug-09 82.20 6491 7.50 283 121 262 835 0.031 ND 0.008 0.122
28-Apr-10 78.12 6495 7.49 313 139 294 892 0.032 ND 0.009 0.183
25-Aug-10 76.5 6497 7.31 335 152 312 1040 0.033 ND 0.01 0.222
26-May-
11 74.51 6498 7.5 336 162 351 1130 0.038 ND 0.012 0.332
31-Aug-11 73.64 6499 8.08

0.329
19-Oct-11 73.36 6500 7.88 312 170 375 1120 0.035 ND 0.009 0.427 *
10-Nov-11 73.44 6500 7.84

0.480
8-Dec-11 73.08 6500 7.98

0.356 *
5-Jan-12 75.28 6498 7.84

0.449 *
9-Feb-12 75.25 6498 7.95

0.404 *
13-Mar-12 74.94 6498 7.67

0.402 *
25-Apr-12 74.77 6498 7.68

0.431 *
8-May-12 74.69 6498 7.76

0.464 *
13-Jun-12 74.39 6499 7.59

0.485 *
* Uranium values are the average of two samples

7

0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 Jan-12 Jan-13
Co
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)

TIME
Time Versus Concentration
Well EF-8
Uranium Trend
0
20
40
60
80
100
120
F
E
E
T

TIME
Depth to Water
Well EF-8

8

6450
6460
6470
6480
6490
6500
6510
6520
6530
6540
6550
6560
6570
6580
F
E
E
T

TIME
Water Elevation
Well EF-8

9

MONITOR WELL RL-1

DEPTH
TO WATER

WATER ELEVATION pH HCO3 Cl SO4 TDS As Mo Se U-Nat
DATE (feet) (MSL) (s.u.) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
31-Mar-03 116.19 6535 7.1 1111 603 3617 7392 0.005 8.02 0.077 37.1
31-Mar-03 116.19 6535 7.1 1111 603 3621 7506 0.0043 8.23 0.075 38.0
31-Mar-03 116.19 6535 7.1 1114 613 3468 7284 0.0023 7.05 0.05 31.4
16-Apr-03 115.21 6536 7.17 1279

8104 0.0028 9.59 0.055 37.3
16-Apr-03 115.21 6536 7.17 1279

8104 0.004 10.1 0.078 40.2
10-May-03 115 6536 7.29 995 725 3712 7272 0.0039 9 0.067 33.4
1-Oct-03 115.15 6536 7.04 1030 651 3706 8224 0.0029 8.45 0.058 36.7
19-Nov-03 115.37 6536 6.99 1030 576 3842 7652

32.2
25-Mar-04 115.1 6536 6.83 1018 331

0.0034 10.2 0.064 40.5
1-Jul-04 115.37 6536 7.01 1032 684

0.006 8.9 0.05 24.37
21-Sep-04 115.63 6535 8.44 801 578

0.003 6.8 0.06 29.54
15-Dec-04 115.62 6535 7.27 851 613

0.0023 8.17 0.045 32.5
3-Mar-05 116.23 6535 7.16 865 607

0.001 7.81 0 29.54
20-Jun-05 116.73 6534 7.61 812 560

0.003 7.4 0.06 33.97
30-Sep-05 117.27 6534 6.88 821 640 3890 7530 0.005 8.7 0.057 36.8
10-Nov-05 116.15 6535 7.01 1158 646 4269 8080 0.004 9.5 0.07 44.31
24-Mar-06 113.61 6537 7.14 912 646 4249 8110 0.004 10.4 0.07 44.31
29-Sep-06 117.15 6534 6.5 1030 664 4380 7940 0.002 6.87 0.047 29.1
14-Dec-06 116.96 6534 6.47 1010 639 4280 8100 0.003 6.99 0.051 29.8
19-Mar-07 115.33 6536 6.92 805 591 3460 6860 0.002 7.4 0.057 30.3
11-Jun-07 115.39 6536 7.08 376 641 3960 7740 0.003 8.7 0.067 39.1
20-Aug-07 115.37 6536 7.64 883 590 4080 7250 0.002 7 0.056 34.3
24-Oct-07 115.47 6536 7.26 1130 667 4300 8300 0.003 9.8 0.07 33.8
4-Jun-08 116.34 6535 7.25 1030 660 4510 8580 0.003 10.2 0.062 46.7
28-Oct-08 116.54 6534 7.24 1050 655 4240 8240 10.8 0.065 41.5
25-Mar-09 114.89 6536 7.38 1120 671 4390 8460 0.001 10.7 0.076 41.4
13-Aug-09 115.05 6536 7.22 1090 644 4250 8580 0.003 11.1 0.072 39.7
29-Apr-10 114.82 6536 7.24 1160 675 4410 8540 0.003 10.4 0.067 43.8
24-Aug-10 115.14 6536 7.08 1170 666 4410 8670 0.004 9.8 0.083 44.4
28-Oct-10 115.12 6536 7.08

40.8 *
* Uranium values from two samples were averaged.

10

MONITOR WELL RL-1 (CONT)

DEPTH
TO WATER

WATER ELEVATION pH HCO3 Cl SO4 TDS As Mo Se U-Nat
DATE (feet) (MSL) (s.u.) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
1-Mar-11 115.03 6536 7.48

44.7 *
23-May-11 114.83 6536 7.69 1150 668 4440 8440 0.003 10.7 0.073 44 *
31-Aug-11 114.84 6536 7.69

42.9 *
19-Oct-11 114.79 6536 8.84 1060 650 4410 8800 0.003 11 0.063 45.1 *
10-Nov-11 114.91 6536 7.33

42.2 *
8-Dec-11 114.85 6536 7.23

42.2 *
5-Jan-12 116.08 6535 7.38

48.5 *
9-Feb-12 116.18 6535 7.40

44.6 *
13-Mar-12 116.11 6535 7.45

49.4 *
25-Apr-12 116.13 6535 7.39

43.7 *
8-May-12 116.15 6535 7.49

47.3 *
13-Jun-12 116.02 6535 7.37

46.7 *
* Uranium values from two samples were averaged.

0
5
10
15
20
25
30
35
40
45
50
55
60
Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 Jan-12 Jan-13
Co
n
c
e
n
t
r
a
t
i
o
n

(
m
g
/
L
)

TIME
Time Versus Concentration
Well RL-1
Uranium Trend

11

80
90
100
110
120
130
140
150
160
Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 Jan-12 Jan-13
F
e
e
t

TIME
Depth to Water
Well RL-1
6490
6500
6510
6520
6530
6540
6550
Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 Jan-12 Jan-13
F
e
e
t

TIME
Elevation
Well RL-1

12

Appendix 2

Field Data Sheets (Including Summary Sheets)

Sample Collection Dates:

January 5, 2012
February 9, 2012
March 13, 2012
April 25, 2012
May 8, 2012
June 13, 2012

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Appendix 3

Laboratory Analytical Reports

Sample Collection Dates:

January 5, 2012
February 9, 2012
March 13, 2012
April 25, 2012
May 8, 2012
June 13, 2012

32

Analytical Report – January 5, 2012

33

34

35

36

37

38

Analytical Report – February 9, 2012

39

40

41

42

43

Analytical Report – March 13, 2012

44

45

46

47

48

Analytical Report – April 25, 2012

49

50

51

52

53

Analytical Report - May 8, 2012

54

55

56

57

58

Analytical Report – June 13, 2012

59

60

61

62

63

Appendix 4

Groundwater Contour Maps

64

6475
Rio Algom Mining LLC –Lisbon Operation
Utah License UT 1900481
Groundwater Elevation Map
1st Half 2012

65

.LTSM
Boundary
LW-1
Rio Algom Mining LLC –Lisbon Operation
Utah License UT 1900481
Uranium concentration contours (mg/L)
1st Half 2012
40

66

Appendix 5

Sampling Methodologies Used

RAML continues to use the ASTM Standard Practice for Low-Flow Purging and Sampling for
Wells (D 6771-02)

67

68

69

70

71

72

73