Attach. 12, 2015-12 SCE&G Wateree Semi-Annual Settlement Report -- Relevant Pages

SOUTH CAROLINA ELECTRIC & GAS
R<>WE r FUR Livrnr<;
WAT E R E E STATION
SEMI-ANNUAL STATUS REPORT
JULY — DECEMBER 2015
January 2016

Semi -Annual Status Report
SCE&G Wateree Station
The purpose of this document is to present a status report for the six-month reporting
period of July 1, 2015 through December 31, 2015 in accordance with the August 17,
2012, Settlement Agreement and Release ("Agreement") between the Catawba
Riverkeeper Foundation, Inc. ("Riverkeeper") and South Carolina Electric & Gas
Company ("SCE&G")
2 ASH REMOVED
During the six-month reporting period of July 1, 2015 through December 31, 2015,
approximately 131,088 dry tons of ash were removed from Pond 1.
3 RESULTS OF GROUNDWATER SAMPLING
During the six-month reporting period of July 1, 2015 through December 31, 2015,
groundwater sampling for wells monitored pursuant to the Mixing Zone Consent
Agreement was performed, with the results presented in the following report:
Semi -Annual Water Quality Monitoring Report: October 2015 Monitoring,
SCE&G, Wateree Station, Eastover, South Carolina
The above report has been submitted to SCDHEC. A copy of the report is attached.
4 ACTIVITIES PERFORMED
During the six-month reporting period of July 1, 2015 through December 31, 2015, the
following activities were performed in furtherance of the Undertakings described in
Paragraph 1 of the Agreement:
A. Paragraph 1.2: SCE&G continued to remove ash from Pond 1 for sale, recycling
or placement in a Class 3 landfill. From January 1, 2012 to present (December
31, 2015), the cumulative net reduction of ash in Pond 1 is approximately
876,021 dry tons. SCE&G has achieved a net reduction of ash in Pond 1 of at
least 240,000 tons from January 1, 2012 to January 1, 2015 as required in
Paragraph 1.2 of the Agreement.
July — December, 2015 Page 1 of 2

Semi -Annual Status Report
SCE&G Wateree Station
B. Paragraph 1.5: On December 5, 2015, the emergency ash sluice pipe for Unit #1
was removed by being capped and abandoned in place. Plans are underway for
removal of the emergency sluice pipe for Unit #2 in the same manner, which will
prevent the deposit of any coal ash into the Ponds and satisfy all requirements of
Paragraph 1.5 of the Agreement.
C. Paragraph 1.7: The final permit to construct a new synthetically lined wastewater
pond to replace Pond 1 was issued by SCDHEC on October 16, 2015 (Permit
Number: 19945 -IW). SCE&G issued a notice to proceed for the construction of
the new wastewater pond on November 9, 2015.
July — December, 2015 Page 2 of 2

Table 1
Historical Summary of Constituent Concentrations in Groundwater
Wateree Station
South Carolina Electric & Gas Company
Eastover, Richland County, South Carolina
Well ID
Event -T
Sample Date Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
MW -1
MZCL
50
5
100
50
2,000
1501 4/17/01 <5 <1 <10 <5
2
2501
11/13/01 <5
<1
<10
<5
1.3
1502
4/23/02 <5
<1
<10
<5
2.22
2502
10/23/02 <5
<1
<10
<5
3.88
1503
4/15/03 <5
<1
<10
<5
0.86
2503
10/20/03 <5
<1
<10
<5
2.68
1SO4
3/9/04 <5
<1
<10
<5
1.1
2SO4
9/30/04 <5
<1
<10
<5
1.7
1505
4/13/05 <5
<1
<10
6
3.05
2505
10/18/05 <5
<1
<10
5
5.01
1506
3/15/06 5
<1
23
7
1.35
2506
10/16/06 <5
<1
<10
<5
1.2
1507
4/30/07 <5
<1
<10
<5
0.69
2507
10/16/07 <5
<1
12
<5
8.9
1508
4/16/08 <5
<1
<10
<5
1.4
2508
10/22/08 21.3
<1
80.3
67.5
0.56
2508 (Resample)
11/6/08 <5.0*
NS
NS
NS
NS
1509
4/21/09 19
<1
93
40
11.36
1509 (Resample)
5/7/09 24*
<1*
86.0*
34.0*
NS
2509
11/5/09 <5
<1
<10
<5
136.9
MW -1A
1510
4/20/10 <5
<1
<10
<5
0.75
2510
10/19/10 <5
<1
<10
5.5
<0.50
1511
4/12/11 <5
<1
<5
<5
<0.50
2511 2511 (Resample)
11/1/11 9.3
<1
<5
<5
<0.50
2511 (Resample)
11/22/11 <5*
NS
NS
NS
NS
1512
5/15/12 <5
<1
<5
<5
<0.50
2512
11/6/12 <5
<1
<5
<5
<0.50
1513
5/13/13 <5
<1
<5
<5
<0.50
2513
10/21/13 <5
<1
<5
<5
0.7
1514
4/28/14 <5
<1
<5
<5
0.9
2514
10/14/14 <5
<1
<5
<5
<0.5
1515
4/14/15 <5
<1
<5
<5
<0.5
2515
10/13/15 <5
<0.1
<0.5
1.6
<0.5
Page 1 of 9

Well ID
Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
MW-2
MZCL
50
5
100
50
2,000
1501 4/17/01 <5 <1 <10 <5
66.9
2501
11/13/01
<5
<1
<10
<5
57.7
1502
4/23/02
<5
<1
<10
<5
52.6
2502
10/23/02
<5
<1
<10
<5
60.3
1503
4/15/03
<5
<1
<10
<5
52.4
2503
10/20/03
<5
<1
<10
<5
54.39
1SO4
3/9/04
<5
<1
<10
<5
52
2SO4
9/30/04
<5
<1
<10
<5
45.8
1505
4/13/05
<5
<1
<10
<5
45.9
2505
10/18/05
<5
<1
<10
<5
44.6
1506
3/15/06
<5
<1
<10
<5
39.56
2506
10/16/06
<5
<1
<10
<5
35.9
1507
4/30/07
<5
<1
<10
<5
32.2
2507
10/16/07
<5
<1
<10
<5
34
1508
4/16/08
<5
<1
<10
<5
38.3
2508
10/22/08
<5
<1
<10
8.4
33.7
1509
4/21/09
<5
<1
<10
8.4
37.7
2509
11/5/09
<5
<1
<10
<5
31.4
1510
4/20/10
<5
<1
<10
<5
35.8
2510
10/19/10
<5
<1
<10
<5
27.9
1511
4/12/11
<5
<1
<5
<5
33.6
2511
11/1/11
<5
<1
<5
<5
34
1512
5/15/12
<5
<1
<5
<5
34.6
2512
11/6/12
5.1
<1
<5
<5
40.7
1513
5/13/13
<5
<1
<5
<5
44.6
2513
10/21/13
<5
<1
<5
<5
40.4
1514
4/28/14
<5
<1
<5
<5
28.8
2514
10/14/14
<5
<1
<5
<5
45.2
1515
4/15/15
<5
<1
<5
<5
44.5
Page 2 of 9

Well ID Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
2515
10/13/15
2
<0.1
<0.5
<0.5
52.76
MW -3 MZCL
1501
4/17/01
3,000
165
5
<1
100
<10
50
<5
2,000
73.4
2501
11/13/01
231
<1
<10
<5
57.8
1502
4/23/02
<1
<10
<5
64.1
2502
10/23/02
186
<1
<10
<5
57.2
1503
4/15/03
284
<1
<10
<5
63.9
2503
10/20/03
193
<1
<10
<5
56.76
1SO4
3/9/04
432.7
<1
<10
<5
38.8
2SO4
9/30/04
198
<1
<10
22.4
44.8
1505
4/13/05
377
<1
13
6
40.1
2505
10/18/05
201
<1
<10
<5
52.3
1506
3/15/06
305
<1
<10
<5
42.35
2506
10/16/06
209
<1
<10
<5
45.1
1507
4/30/07
232
<1
<10
<5
43.8
2507
10/16/07
179
<1
<10
<5
38.1
1508
4/16/08
402
<1
<10
<5
47.2
2508
10/22/08
189
<1
<10
<5
40.98
2508
11/6/08
208*
NS
NS
NS
NS
1509
4/21/09
294
<1
<10
<5
35.8
1509 (Resample)
5/7/09
143*
<1*
<10*
<5*
NS
2509
11/5/09
162
<1
<10
<5
29.6
1510
4/20/10
485
<1
<10
<5
36.6
2510
10/19/10
144
<1
<10
<5
28.1
1511
4/12/11
176
1.3
<5
<5
63
2511
11/1/11
202
<1
<5
<5
46.7
1512
5/15/12
164
<1
<5
<5
58.8
2512
11/6/12
162
<1
<5
<5
41.9
1513
5/13/13
103
<1
<5
<5
70.5
2513
10/21/13
153
<1
<5
<5
86.4
1514
4/28/14
82.8
1.2
<5
<5
44.6
2514
10/14/14
122
<1
<5
<5
59.1
1515
4/15/15
52.5
<1
<5
<5
15.6
Page 3 of 9

Well ID Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
2515
10/12/15
2.9
<0.1
<0.5
<0.5
<0.5
MWA MZCL
1501
4/17/01
3,000
8.1
5
<1
100
<10
50
<5
2,000
4.6
2501
11/13/01
<5
<1
<10
<5
4.4
1502
4/23/02
8.8
<1
<10
<5
4.8
2502
10/23/02
<5
<1
<10
<5
4.1
1503
4/15/03
12.3
<1
<10
<5
5.5
2503
10/20/03
<5
<1
<10
<5
2.91
1SO4
3/9/04
7.6
3.4
<10
<5
2.2
2SO4
9/30/04
7.9
2.2
<10
<5
12.6
1505
4/13/05
<5
<1
<10
<5
3.39
2505
10/18/05
15.1
3.4
<10
<5
6.3
1506
3/15/06
<5
2.2
<10
<5
3.96
2506
10/16/06
<5
<1
<10
<5
4.3
1507
4/30/07
<5
<1
<10
<5
<0.50
2507
10/16/07
<5
<1
<10
<5
<0.50
1508
4/16/08
<5
1.1
<10
<5
<0.5
2508
10/22/08
<5
<1
<10
<5
<0.5
1509
4/21/09
<5
<1
<10
<5
7.02
2509
11/5/09
<5
<1
<10
<5
<0.5
1510
4/20/10
<5
3.2
<10
<5
10.4
2510
10/19/10
<5
<1
<10
<5
<0.5
1511
4/12/11
<5
<1
<5
<5
<0.5
2511
11/1/11
<5
<1
<5
<5
3
1512
5/15/12
<5
1.9
<5
<5
8.7
2512
11/6/12
<5
1.5
<5
<5
<0.5
1513
5/13/13
<5
1.5
<5
<5
1.05
2513
10/21/13
<5
<1
<5
<5
0.9
1514
4/28/14
<5
3.6
<5
<5
6.1
2514
10/14/14
<5
3.7
<5
<5
0.96
1515
4/15/15
<5
<1
<5
<5
1.4
Page 4 of 9

Well ID
Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
2515
10/12/15
2
<0.1
0.5
<0.5
0.71
MW -5
MZCL
50
15
100
50
2,000
1501 4/17/01 <5 2.2 <10 <5
0.7
2501
11/13/01
<5
<1
<10
<5
34.6
1502
4/23/02
5
4.2
18.5
8.5
1.93
2502
10/23/02
<5
<1
<10
<5
2.71
1503
4/15/03
15.4
<1
<10
<5
<0.5
2503
10/20/03
<5
<1
<10
<5
<0.5
1SO4
3/9/04
8
3.1
<10
<5
<0.5
2SO4
9/30/04
7.3
5.8
<10
<5
4
1505
4/13/05
10
<1
15
8
<0.5
2505
10/18/05
5.2
5.4
<10
<5
<0.5
1506
3/15/06
<5
5.5
<10
<5
<0.5
2506
10/16/06
<5
<1
<10
<5
<0.5
1507
4/30/07
<5
<1
<10
<5
<0.50
2507
10/16/07
<5
1.14
<10
<5
<0.50
1508
4/16/08
<5
1.9
<10
<5
<0.5
2508
10/22/08
<5
1.4
<10
6.6
<0.5
1509
4/21/09
<5
<1
<10
<5
<0.5
2509
11/5/09
<5
<1
<10
<5
<0.5
1510
4/20/10
<5
3.4
<10
<5
<0.5
2510
10/19/10
<5
<1
<10
<5
<0.5
1511
4/12/11
6.1
<1
<5
<5
<0.5
2511
11/1/11
9.1
<1
<5
6.1
4
2S11 (Resample)
12/2/11
<5*
NS
NS
NS
NS
1512
5/15/12
<5
3.4
<5
7
13.4
2512
11/6/12
<5
2.9
<5
8.8
37.8
1513
5/13/13
5.7
<1
9.5
7.2
<0.5
2513
10/21/13
<5
1.1
<5
6.4
0.9
1514
4/28/14
<5
3.5
5.7
<5
0.9
2514
10/13/14
<5
<1
<5
6.2
<0.5
1515
4/14/15
<5
2.9
<5
<5
<0.5
2515
10/12/15
4.4
<0.1
<0.5
<0.5
<0.5
Page 5 of 9

Well ID
Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
MW -6
MZCL
50
5
100
50
2,000
2501 11/13/01 <5 <1 <10 <5
48.4
1502
4/23/02
<5
<1
<10
<5
47.9
2502
10/23/02
<5
<1
<10
<5
39.5
1503
4/15/03
<5
<1
<10
<5
32.4
2503
10/20/03
<5
<1
<10
<5
44.92
1SO4
3/9/04
<5
2.8
<10
<5
2.9
2SO4
9/30/04
<5
<1
<10
<5
32.1
1505
4/13/05
<5
<1
<10
<5
29.6
2505
10/18/05
<5
<1
<10
<5
35.9
1506
3/15/06
<5
<1
<10
<5
34.22
2506
10/16/06
<5
<1
<10
<5
30.4
1507
4/30/07
<5
<1
<10
<5
<0.50
2507
10/16/07
<5
<1
187
11.6
<0.50
1508
4/16/08
6.4
<1
<10
<5
30
2508
10/22/08
<5
<1
29.6
<5
24.5
1509
4/21/09
<5
<1
<10
<5
<0.5
2509
11/5/09
<5
<1
<10
<5
22.5
1510
4/20/10
<5
3.4
<10
<5
1.56
2510
10/19/10
<5
3.7
<10
<5
5.33
1511
4/12/11
<5
1.2
<5
<5
29.9
2511
11/1/11
<5
1.2
<5
<5
29.4
1512
5/16/12
6.7
<1
7.3
<5
35
2512
11/6/12
<5
<1
<5
<5
37.2
1513
5/13/13
5
<1
<5
<5
31.2
2513
10/21/13
<5
<1
<5
<5
34.8
1514
4/28/14
<5
<1
<5
<5
26
2514
10/13/14
<5
<1
<5
<5
26.2
1515
4/14/15
<5
<1
<5
<5
30.8
Page 6 of 9

Well ID
Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
2515
10/12/15
0.8
<0.1
<0.5
<0.5
29.52
MW-8
MZCL
50
15
100
50
2,000
1501 4/17/01 15.1 1 <10 <5
226.8
2501
11/13/01
<5
<1
<10
<5
91.6
1502
4/23/02
7.8
<1
<10
5
158.5
2502
10/23/02
<5
<1
<10
<5
243
1503
4/15/03
<5
4.4
<10
<5
441.3
2503
10/20/03
19.8
3.4
<10
<5
164.9
1SO4
3/9/04
<5
3.9
<10
<5
99.2
2SO4
9/30/04
<5
<1
<10
<5
247.1
1505
4/13/05
<5
<1
<10
<5
290
2505
10/18/05
<5
<1
<10
<5
314
1506
3/15/06
<5
2.8
<10
<5
207.8
2506
10/16/06
<5
<1
<10
<5
170
1507
4/30/07
6
<1
<10
<5
73
2507
10/16/07
<5
<1
<10
<5
13
1508
4/16/08
<5
<1
<10
<5
15.1
2508
10/22/08
<5
<1
<10
<5
3.2
1509
4/21/09
<5
<1
<10
<5
37.1
2509
11/5/09
<5
<1
<10
<5
37.8
1510
4/20/10
<5
3.1
<10
<5
12.08
2510
10/19/10
<5
3.1
<10
<5
1.11
1511
4/12/11
<5
<1
6.5
<5
66.3
2511
11/1/11
<10
2.2
<10
<10
115
1512
5/16/12
<50
<10
<50
<50
195
2512
11/6/12
10.7
2.8
<10
<10
198
1513
5/13/13
<5
<1
5
10.6
129.9
2513
10/21/13
<5
<1
<5
5.6
125
1514
4/28/14
<5
2
<5
<5
119
2514
10/13/14
<5
<1
<5
<5
77.4
1515
4/14/15
<5
<1
<5
5
63.8
2515
10/12/15
1.7
<0.1
2
0.62
49.4
Page 7 of 9

Well ID
Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
MW-9
MZCL
50
15
100
50
2,000
1501 4/17/01 <5 5.8 <10 <5
1,040
2501
11/13/01
<5
<1
<10
<5
1,182
1502
4/23/02
<5
7.9
<10
5
1,044
2502
10/23/02
<5
<1
<10
<5
1,603
1503
4/15/03
7.7
8.8
<10
<5
775.6
2503
10/20/03
<5
<1
<10
<5
824.5
1SO4
3/9/04
<5
6.9
<10
<5
962
2SO4
9/30/04
<5
1
<10
<5
775.4
1505
4/13/05
<5
<1
<10
<5
963
2505
10/18/05
<5
4.5
<10
<5
916
1506
3/15/06
<5
<1
<10
<5
957
2506
10/16/06
<5
<1
<10
<5
861
1507
4/30/07
<5
<1
<10
<5
241
2507
10/16/07
<5
<1
<10
<5
1,200
1508
4/16/08
<5
2.4
<10
<5
9,330
2508
10/22/08
<5
2.4
<10
<5
1,247.30
1509
4/21/09
<5
<1
<10
<5
432
2509
11/5/09
<5
<1
<10
<5
1,017
1510
4/20/10
<5
<1
<10
<5
992
2510
10/19/10
<5
<1
<10
<5
1,045
1511
4/12/11
7.4
3.6
<5
8.8
900
2511
11/1/11
9.6
<1
<5
10
992
2511 (Resample)
12/2/11
<5*
<1*
NS
NS
NS
1512
5/15/12
<5
2.2
<5
13.4
978
2512
11/6/12
<5
8.2
<5
13.6
945
1513
5/13/13
<5
2.2
<5
13.9
710
2513
10/21/13
<5
3.4
<5
12
926
1514
4/28/14
<5
<1
<5
9.1
425
2514
10/13/14
<5
<1
<5
11.5
973
1515
4/14/15
<5
<1
<5
11.1
761
2515
10/13/15
3.9
0.5
0.6
<0.5
707.9
Page 8 of 9

Well ID
Event
Sample Date
Arsenic
Cadmium
Parameter
Chromium
Lead
Sulfate
MW-11
MZCL
3,000
5
100
50
2,000
1501 4/17/01 565 <1 <10 <5
59.2
2501
11/13/01
1,150
<1
<10
<5
60.3
1502
4/23/02
1,143
<1
<10
<5
63.8
2502
10/23/02
774
<1
<10
<5
68.2
1503
4/15/03
322
<1
<10
<5
57.7
2503
10/20/03
1,345
<1
<10
<5
63.9
1SO4
3/9/04
337
<1
19.2
7.9
54.3
2SO4
9/30/04
563
<1
18.7
9.7
40.7
1505
4/13/05
891
<1
73
39
53.9
2505
10/18/05
1,512
<1
31.4
13.7
54.2
1506
3/15/06
5,100
<1
40
14
36.82
1506 (Resample)
6/1/06
968*
NS
NS
NS
NS
2506
10/16/06
1,492
<1
<10
<5
68.2
1507
4/30/07
4,051
<1
10
7
27.5
1507 (Resample)
5/7/07
252*
NS
NS
NS
NS
2507
10/16/07
2,452
<1
<10
5.2
26.8
1508
4/16/08
310
<1
<10
<5
35.4
2508
10/22/08
2,149
<1
13.2
8
32.04
2508 (Resample)
11/6/08
424*
NS
NS
NS
NS
1509
4/21/09
567
<1
<10
<5
41.9
1509 (Resample)
5/7/09
932*
<1*
<10*
<5*
NS
2509
11/5/09
576
<1
<10
<5
27.6
1510
4/20/10
796
<1
31.7
10.9
60.8
2510
10/19/10
696
<1
<10
<5
55.7
1511
4/12/11
380
<1
8.7
<5
44.5
1511 (Resample)
6/15/11
1,100*
<1*
<5*
<5*
102.4*
2511
11/1/11
318
<1
<5
<5
107
1512
5/15/12
690
<1
<5
<5
85.8
2512
11/6/12
460
<1
<5
<5
43
1513
5/13/13
94.5
<1
<5
<5
24.7
2513
10/22/13
355
<1
<5
<5
42.4
1514
4/28/14
97
<1
<5
<5
25.9
2514
10/13/14
101
<1
<5
<5
22.2
1515
4/14/15
93.8
<1
<5
<5
15.5
2515
10/13/15
58.6
<0.1
1.8
0.61
19.35
MW-12
1515
4/14/15
<5.0
<1.0
<5.0
<5.0
24.6
2515
10/13/15
1.9
<0.1
0.5
<0.5
30.12
Notes:
1) All concentrations for total metals and are provided in micrograms per liter (µg/I).
2) Sulfate concentrations are provided in milligrams per liter (mg/L).
3) MZCL = Mixing Zone Contaminant Level.
4) MZCL for arsenic for wells MW -1A, MW -2, MW -5, MW -6, MW -8, and MW -9 is 50 ug/l.
5) MZCL for arsenic for wells MW -3, MW -4, and MW -11 is 3,000 ug/l.
6) MZCL for cadmium for wells MW -1, MW -2, MW -3, MW -4, MW -6, and MW -11 is 5.0 ug/I.
7) MZCL for cadmium for wells MW -5, MW -8, and MW -9 is 15.0 ug/I.
8) NS = Not analyzed.
9) Bold type indicates concentration above MZCL.
10) * = Results of resampling
Page 9 of 9