### 1 Question s for Keystone

– 6/17/2014

D ata provided on 5/16/2014

1. We identified a couple discrepancies between the RL and dilution factor values reported in the analytical spreadsheet , when compared to the RL and dilution factor values cited in the lab report for total mercury (see Table 1 ). Please con f 

### irm which RL and dilution factor is correct for these data samples. The RLs for these two samples are reported as identical in the two laboratory reports; however, the laboratory reports have a 500

- fold di fference in the reported dilution factor.

Table 1 . Dilution Factor Discrepancies between Analytical Spreadsheet and Lab Reports for Mercury

Date Units Amount MDL RL (from Spreadsheet) RL

(from

Lab Report ) DF (from

Spreadsheet) DF

(from

Lab Report ) Sample Point

6

- Jan

- 14 mg/L 0.52 0.0005 0.001 0.1 5 500 FGD Influent (SP

- 1)

13

- Jan

- 14 mg/L 0.505 0.0005 0.001 0.1 5 1 FGD Influent (SP

- 1)



### Original data submitted on 2/21/ 20 14:

2. 

### Two separate lab reports were provided for FGD influent mercury results associated with samples collected on 4/10/2012. The laboratory report provided in NRG Energy’s original submission includes a FGD influent mercury result of 0.0013 mg/L, which is not included in the analytical data table; and the laboratory report provided in the additional data submission on 5/16/14 includes a mercury result of 650 ug/L, which is included in the analytical data table. The data

table also includes a FGD influent mercu ry result of 0.66 mg/L for 4/10/2012. Please provide a laboratory report verifying this result. Additionally, please explain why 0.0013 mg/L is not included in the analytical data table.

3. We identified several discrepancies between the dilution factor (DF) value s reported in the analytical spreadsheet compared to the cited dilution factor s in the lab report s for the mercury

results (see Table 2 ) . Please confirm which dilution factor is correct for these data samples.

Table 2

. Di lution Factor Discrepanc ies between Analytical Spreadsheet and Lab Reports for Mercury

Date Non

Detect
Indicator Units Amount MDL RL D F (from Spreadsheet) D F (from

Lab Report ) Sample Point

03

- Jan

- 12 D mg/L 0.54 0.05 0.1 1 500 FGD Influent (SP

- 1)

10

- Jan

- 12 D mg/L 0.49 0.05 0.1 1 500 FGD Influent (SP

- 1)

17

- Jan

- 12 D mg/L 0.66 0.05 0.1 1 500 FGD Influent (SP

- 1)

24

- Jan

- 12 D mg/L 0.15 0.05 0.1 1 500 FGD Influent (SP

- 1)

31

- Jan

- 12 D mg/L 0.57 0.05 0.1 1 500 FGD Influent (SP

- 1)

### 2

Table 2

. Di lution Factor Discrepanc ies between Analytical Spreadsheet and Lab Reports for Mercury

Date Non

Detect
Indicator Units Amount MDL RL D F (from Spreadsheet) D F (from

Lab Report ) Sample Point

07

- Feb

- 12 D mg/L 0.69 0.05 0.1 1 500 FGD Influent (SP

- 1)

14

- Feb

- 12 D mg/L 0.17 0.05 0.1 1 500 FGD Influent (SP

- 1)

21

- Feb

- 12 D mg/L 0.33 0.05 0.1 1 500 FGD Influent (SP

- 1)

28

- Feb

- 12 D mg/L 0.66 0.05 0.1 1 500 FGD Influent (SP

- 1)

06

- Mar

- 12 D mg/L 0.38 0.05 0.1 1 500 FGD Influent (SP

- 1)

13

- Mar

- 12 D mg/L 0.6 0.05 0.1 1 500 FGD Influent (SP

- 1)

20

- Mar

- 12 D mg/L 0.66 0.05 0.1 1 500 FGD Influent (SP

- 1)

27

- Mar

- 12 D mg/L 0.49 0.05 0.1 1 500 FGD Influent (SP

- 1)

03

- Apr

- 12 D mg/L 0.16 0.05 0.1 1 500 FGD Influent (SP

- 1)

10

- Apr

- 12 D μg/L 650 50 100 1 500 FGD Influent (SP

- 1)

17

- Apr

- 12 ND mg/L 0.05 0.1 1 500 FGD Influent (SP

- 1)

25

- Apr

- 12 D mg/L 0.89 0.05 0.1 1 500 FGD Influent (SP

- 1)

01

- May

- 12 D mg/L 0.95 0.05 0.1 1 500 FGD Influent (SP

- 1)

08

- May

- 12 D mg/L 0.4 0.05 0.1 1 500 FGD Influent (SP

- 1)

15

- May

- 12 D mg/L 0.25 0.05 0.1 1 500 FGD Influent (SP

- 1)

23

- May

- 12 D mg/L 0.64 0.05 0.1 1 500 FGD Influent (SP

- 1)

29

- May

- 12 D mg/L 0.82 0.05 0.1 1 500 FGD Influent (SP

- 1)

05

- Jun

- 12 D mg/L 0.64 0.05 0.1 1 500 FGD Influent (SP

- 1)

12

- Jun

- 12 D mg/L 0.73 0.05 0.1 1 500 FGD Influent (SP

- 1)

20

- Jun

- 12 D mg/L 0.54 0.05 0.1 1 500 FGD Influent (SP

- 1)

26

- Jun

- 12 D mg/L 0.14 0.05 0.1 1 500 FGD Influent (SP

- 1)

03

- Jul

- 12 D mg/L 0.745 0.05 0.1 1 500 FGD Influent (SP

- 1)

10

- Jul

- 12 D mg/L 0.89 0.05 0.1 1 500 FGD Influent (SP

- 1)

17

- Jul

- 12 D mg/L 0.66 0.05 0.1 1 500 FGD Influent (SP

- 1)

24

- Jul

- 12 D mg/L 0.835 0.05 0.1 1 500 FGD Influent (SP

- 1)

31

- Jul

- 12 D mg/L 0.362 0.05 0.1 1 500 FGD Influent (SP

- 1)

07

- Aug

- 12 D mg/L 0.114 0.05 0.1 1 500 FGD Influent (SP

- 1)

14

- Aug

- 12 D mg/L 0.59 0.05 0.1 1 500 FGD Influent (SP

- 1)

21

- Aug

- 12 D mg/L 0.264 0.05 0.1 1 500 FGD Influent (SP

- 1)

28

- Aug

- 12 D mg/L 0.535 0.05 0.1 1 500 FGD Influent (SP

- 1)

28

- Aug

- 12 ND mg/L 0.001 1 5 Outfall 101 (SP

- 2)

05

- Sep

- 12 D mg/L 0.67 0.05 0.1 1 500 FGD Influent (SP

- 1)

11

- Sep

- 12 D mg/L 0.465 0.05 0.1 1 500 FGD Influent (SP

- 1)

18

- Sep

- 12 ND mg/L 0.05 0.1 1 500 FGD Influent (SP

- 1)

24

- Oct

- 12 D mg/L 0.418 0.05 0.1 1 500 FGD Influent (SP

- 1)

30

- Oct

- 12 D mg/L 0.79 0.05 0.1 1 500 FGD Influent (SP

- 1)

### 3

Table 2

. Di lution Factor Discrepanc ies between Analytical Spreadsheet and Lab Reports for Mercury

Date Non

Detect
Indicator Units Amount MDL RL D F (from Spreadsheet) D F (from

Lab Report ) Sample Point

07

- Nov

- 12 D mg/L 0.77 0.05 0.1 1 500 FGD Influent (SP

- 1)

12

- Nov

- 12 D mg/L 0.364 0.05 0.1 1 500 FGD Influent (SP

- 1)

19

- Nov

- 12 D mg/L 0.481 0.05 0.1 1 500 FGD Influent (SP

- 1)

26

- Nov

- 12 D mg/L 0.109 0.05 0.1 1 500 FGD Influent (SP

- 1)

03

- Dec

- 12 D mg/L 0.308 0.05 0.1 1 500 FGD Influent (SP

- 1)

05

- Dec

- 12 D mg/L 0.242 0.05 0.1 1 500 FGD Influent (SP

- 1)

12

- Dec

- 12 D mg/L 0.333 0.05 0.1 1 500 FGD Influent (SP

- 1)

17

- Dec

- 12 D mg/L 0.308 0.05 0.1 1 500 FGD Influent (SP

- 1)

26

- Dec

- 12 D mg/L 0.585 0.05 0.1 1 500 FGD Influent (SP

- 1)

02

- Jan

- 13 ND mg/L 0.05 0.1 1 500 FGD Influent (SP

- 1)

07

- Jan

- 13 D mg/L 0.43 0.05 0.1 1 500 FGD Influent (SP

- 1)

14

- Jan

- 13 D mg/L 0.615 0.05 0.1 1 500 FGD Influent (SP

- 1)

21

- Jan

- 13 ND mg/L 0.05 0.1 1 500 FGD Influent (SP

- 1)

29

- Jan

- 13 D mg/L 0.705 0.05 0.1 1 500 FGD Influent (SP

- 1)

05

- Feb

- 13 D mg/L 0.54 0.05 0.1 1 500 FGD Influent (SP

- 1)

11

- Feb

- 13 D mg/L 0.178 0.05 0.1 1 500 FGD Influent (SP

- 1)

18

- Feb

- 13 D mg/L 0.191 0.05 0.1 1 500 FGD Influent (SP

- 1)

25

- Feb

- 13 D mg/L 0.545 0.05 0.1 1 500 FGD Influent (SP

- 1)

04

- Mar

- 13 D mg/L 0.375 0.05 0.1 1 500 FGD Influent (SP

- 1)

11

- Mar

- 13 D mg/L 0.625 0.05 0.1 1 500 FGD Influent (SP

- 1)

19

- Mar

- 13 D mg/L 0.63 0.05 0.1 1 500 FGD Influent (SP

- 1)

25

- Mar

- 13 D mg/L 0.109 0.05 0.1 1 500 FGD Influent (SP

- 1)

01

- Apr

- 13 D mg/L 0.52 0.05 0.1 1 500 FGD Influent (SP

- 1)

09

- Apr

- 13 D mg/L 0.585 0.05 0.1 1 500 FGD Influent (SP

- 1)

15

- Apr

- 13 D mg/L 0.26 0.05 0.1 1 500 FGD Influent (SP

- 1)

22

- Apr

- 13 D mg/L 0.351 0.05 0.1 1 500 FGD Influent (SP

- 1)

29

- Apr

- 13 D mg/L 0.408 0.05 0.1 1 500 FGD Influent (SP

- 1)

06

- May

- 13 D mg/L 0.153 0.05 0.1 1 500 FGD Influent (SP

- 1)

13

- May

- 13 D mg/L 0.835 0.05 0.1 1 500 FGD Influent (SP

- 1)

20

- May

- 13 D mg/L 0.9 0.05 0.1 1 500 FGD Influent (SP

- 1)

28

- May

- 13 D mg/L 0.203 0.05 0.1 1 500 FGD Influent (SP

- 1)

03

- Jun

- 13 D mg/L 0.75 0.05 0.1 1 500 FGD Influent (SP

- 1)

10

- Jun

- 13 D mg/L 0.278 0.05 0.1 1 500 FGD Influent (SP

- 1)

22

- Jun

- 13 D mg/L 0.78 0.05 0.1 1 500 FGD Influent (SP

- 1)

26

- Jun

- 13 D mg/L 0.178 0.05 0.1 1 500 FGD Influent (SP

- 1)

01

- Jul

- 13 D mg/L 0.925 0.05 0.1 1 500 FGD Influent (SP

- 1)

### 4

Table 2

. Di lution Factor Discrepanc ies between Analytical Spreadsheet and Lab Reports for Mercury

Date Non

Detect
Indicator Units Amount MDL RL D F (from Spreadsheet) D F (from

Lab Report ) Sample Point

08

- Jul

- 13 D mg/L 0.77 0.05 0.1 1 500 FGD Influent (SP

- 1)

15

- Jul

- 13 D mg/L 0.79 0.05 0.1 1 500 FGD Influent (SP

- 1)

22

- Jul

- 13 D mg/L 0.31 0.05 0.1 1 500 FGD Influent (SP

- 1)

29

- Jul

- 13 D mg/L 0.85 0.05 0.1 1 500 FGD Influent (SP

- 1)

05

- Aug

- 13 ND mg/L 0.05 0.1 1 500 FGD Influent (SP

- 1)

12

- Aug

- 13 D mg/L 0.625 0.05 0.1 1 500 FGD Influent (SP

- 1)

19

- Aug

- 13 D mg/L 0.153 0.05 0.1 1 500 FGD Influent (SP

- 1)

26

- Aug

- 13 D mg/L 0.93 0.05 0.1 1 500 FGD Influent (SP

- 1)

03

- Sep

- 13 D mg/L 0.945 0.05 0.1 1 500 FGD Influent (SP

- 1)

09

- Sep

- 13 D mg/L 0.431 0.05 0.1 1 500 FGD Influent (SP

- 1)

16

- Sep

- 13 D mg/L 0.432 0.05 0.1 1 500 FGD Influent (SP

- 1)

23

- Sep

- 13 D mg/L 0.56 0.05 0.1 1 500 FGD Influent (SP

- 1)

30

- Sep

- 13 D mg/L 0.214 0.05 0.1 1 500 FGD Influent (SP

- 1)

07

- Oct

- 13 D mg/L 0.436 0.05 0.1 1 500 FGD Influent (SP

- 1)

14

- Oct

- 13 D mg/L 0.327 0.05 0.1 1 500 FGD Influent (SP

- 1)

21

- Oct

- 13 D mg/L 0.334 0.05 0.1 1 500 FGD Influent (SP

- 1)

28

- Oct

- 13 D mg/L 0.117 0.05 0.1 1 500 FGD Influent (SP

- 1)

04

- Nov

- 13 D mg/L 0.106 0.05 0.1 1 500 FGD Influent (SP

- 1)

11

- Nov

- 13 D mg/L 0.414 0.05 0.1 1 500 FGD Influent (SP

- 1)

18

- Nov

- 13 D mg/L 0.52 0.05 0.1 1 500 FGD Influent (SP

- 1)

25

- Nov

- 13 D mg/L 0.59 0.05 0.1 1 500 FGD Influent (SP

- 1)

02

- Dec

- 13 D mg/L 0.65 0.05 0.1 1 500 FGD Influent (SP

- 1)

09

- Dec

- 13 D mg/L 0.288 0.05 0.1 1 500 FGD Influent (SP

- 1)

16

- Dec

- 13 D mg/L 0.735 0.05 0.1 1 500 FGD Influent (SP

- 1)

23

- Dec

- 13 D mg/L 0.126 0.05 0.1 1 500 FGD Influent (SP

- 1)