ALL IMPINGED ORGANISMS (excludes tadpole and corbicula and turtle)

StartDate SumOfTotal Batch Count % of total

08-Nov-05 1 1%

22-Nov-05 1 1%

05-Dec-05 0 0%

19-Dec-05 0 0%

09-Jan-06 1 1%

30-Jan-06 0 0%

13-Feb-06 1 1%

27-Feb-06 3 3%

13-Mar-06 4 4%

27-Mar-06 10 11%

10-Apr-06 3 3%

24-Apr-06 5 5%

08-May-06 5 5%

22-May-06 1 1%

05-Jun-06 3 3%

19-Jun-06 6 6%

10-Jul-06 6 6%

24-Jul-06 11 12%

07-Aug-06 10 11%

21-Aug-06 3 3%

11-Sep-06 0 0%

25-Sep-06 4 4%

10-Oct-06 0 0%

23-Oct-06 17 18%

0

2

4

6

8

10

12

14

16

18

N

u

m

b

er of org

a

nis

m

s

14

95 Start Date

11/8/2005

11/22/2005

12/5/2005

12/19/2005

1/9/2006

1/30/2006

2/13/2006

2/27/2006

3/13/2006

3/27/2006

4/10/2006

4/24/2006

5/8/2006

5/22/2006

6/5/2006

1

7

0

2

4

6

8

10

12

14

Alabama shadthreadfin shad

N

u

m

b

er of e

v

e

nts (n

=

2

4)
6/19/2006

7/10/2006

7/24/2006

8/7/2006

8/21/2006

9/11/2006

9/25/2006

10/10/2006

10/23/2006
NUMBER OF ORGANISMS IMPINGED PER EVENT

FREQUENCY OF SPECIES OCCURRENCE

1 1

13

3

5

1 1

3

1 1

threadfin shadcommon carpweed shinerchannel catfishflathead catfish redbreast sunfishgreen sunfishdollar sunfishlargemouth bassGulf darter blackbanded darter

FREQUENCY OF SPECIES OCCURRENCE

StartDate Day Night

08-Nov-05 1 0

22-Nov-05 1 0

0 0

0 0

09-Jan-06 1 0

0 0

13-Feb-06 0 1

27-Feb-06 0 3

13-Mar-06 2 2

27-Mar-06 3 7

10-Apr-06 2 1

24-Apr-06 2 3

08-May-06 0 5

22-May-06 1 0

05-Jun-06 1 2

19-Jun-06 3 3

10-Jul-06 5 1

24-Jul-06 8 3

07-Aug-06 3 7

21-Aug-06 2 1

0 0

25-Sep-06 1 3

0 0

23-Oct-06 3 14

95

t-Test: Paired Two Sample for Means

Night Day

Mean 2.333333 1.625

Variance 10.66667 3.63587

Observations 24 24

Pearson Correlation 0.349079

Hypothesized Mean Difference 0

df 23

t Stat 1.099839

P(T<=t) one-tail 0.141391

t Critical one-tail 1.713872

P(T<=t) two-tail 0.282781

t Critical two-tail 2.068658

12

blackbanded dartercrayfish
ALL IMPINGED ORGANISMS (excludes tadpole and corbicula)

StartDate SumOfTotal Weight % of total

08-Nov-05 7 1%

22-Nov-05 8 1%

05-Dec-05 0 0%

19-Dec-05 0 0%

09-Jan-06 7 1%

30-Jan-06 0 0%

13-Feb-06 0 0%

27-Feb-06 8 1%

13-Mar-06 11.3 1%

27-Mar-06 79.1 8%

10-Apr-06 15 1%

24-Apr-06 60 6%

08-May-06 47 5%

22-May-06 4 0%

05-Jun-06 226.3 22%

19-Jun-06 26.5 3%

10-Jul-06 159.1 15%

24-Jul-06 119 11%

07-Aug-06 114 11%

21-Aug-06 12 1%

11-Sep-06 0%

25-Sep-06 15 1%

10-Oct-06 0%

23-Oct-06 123.3 12% 0%

5%

10%

15%

20%

25%

1041.6

StartDate SumOfTotal Weight

11/8/2005 7

11/22/2005 8

1/9/2006 7

2/13/2006 0

2/27/2006 8

3/13/2006 11.3

3/27/2006 79.1

4/10/2006 15

4/24/2006 60

5/8/2006 47

5/22/2006 4

6/5/2006 226.3

6/19/2006 26.5

7/10/2006 159.1

7/24/2006 119

8/7/2006 114
8/21/2006 12

9/25/2006 15

10/23/2006 123.3
Biomass by date
relative Abund

Page 1

Alabama shad

threadfin shad

common carp

weed shiner

channel catfish

flathead catfish

redbreast sunfish

green sunfish

dollar sunfish

largemouth bass

Gulf darter

blackbanded darter

crayfish
NUMBER IMP BY SPE BY EVNT

Page 1

Alabama shad

common carp

channel catfish

redbreast sunfish

dollar sunfish

Gulf darter

crayfish

0

2

4

6

8

10

12

11/8/2

0

0

5

11/2

2/2

0

0

5

12/5/2

0

0

5

12/19/2

0

0

5

1/9/2

0

0

6

1/3

0/2

0

0

6

2/13/2

0

0

6

2/2

7/2

0

0

6

3/13/2

0

0

6

3/2

7/2

0

0

6

4/10/2

0

0

6

4/2

4/2

0

0

6

5/8/2

0

0

6

5/2

2/2

0

0

6

6/5/2

0

0

6

6/19/2

0

0

6

7/10/2

0

0

6

7/2

4/2

0

0

6

8/7/2

0

0

6

8/21/2

0

0

6

9/11/2

0

0

6

9/2

5/2

0

0

6

10/10/2

0

0

6

10/2

3/2

0

0

6

N

u

m

b

er of fis

h im

pin

g

e

d

Alabama shad

threadfin shad

common carp

weed shiner

channel catfish

flathead catfish

redbreast sunfish

green sunfish

dollar sunfish

largemouth bass

Gulf darter

blackbanded darter

crayfish
Sort SpeciesName 11/8/2005

########

12/5/2005

########

1/9/2006

#N/A #N/A Alabama shad

66 Dorosoma petenense threadfin shad 1

68 Cyprinus carpio common carp

68 Notropis texanus weed shiner

81 Ictalurus punctatus channel catfish

81 Pylodictis olivaris flathead catfish 1

131 Lepomis auritus redbreast sunfish

131 Lepomis cyanellus green sunfish

131 Lepomis marginatus dollar sunfish

131 Micropterus salmoides largemouth bass

132 Etheostoma swaini Gulf darter

132 Percina nigrofasciata blackbanded darter

999 Crayfish, unidentified crayfish 1

SUM 1 1 0 0 1

Winter Spr Sum

Abun. 5 28 39

% 5.3 29.5 41.1

No. taxa 4 7 9

38664 threadfin shad 28 Alabama shad1

38678 channel catfish 24 threadfin shad7

38691 crayfish 14 common carp1

38705 Alabama shad 7 weed shiner 1

38726 redbreast sunfish 6 channel catfish13

38747 largemouth bass 5 flathead catfish3

38761 weed shiner 3 redbreast sunfish 5

38775 flathead catfish 3 green sunfish 1

38789 common carp 1 dollar sunfish 1

38803 green sunfish 1 largemouth bass 3

38817 dollar sunfish 1 Gulf darter 1

38831 Gulf darter 1 blackbanded darter 1

38845 blackbanded darter 1 crayfish 12

38859

38873

38887

38908

38922

38936

38950

38971

38985

39000

39013
1/9/2006

1/30/20062/13/20062/27/20063/13/20063/27/20064/10/20064/24/20065/8/20065/22/20066/5/20066/19/20067/10/20067/24/2006

7

2 5 3

1

3

1 1 5 2 3 2 1 1 1 2

1 1

1 1

1

1

1 1

1

1 2 1 1 1 1 1 1

0 1 3 4 10 3 5 5 1 3 6 6 11

fall

23

24.2

6
7/24/2006

8/7/20068/21/20069/11/20069/25/2006

################

Sum % of Total COUNT

7 7% 1

4 1 12 28 29% 7

1 1% 1

3 3% 1

1 2 2 24 25% 13

3 3% 3

1 1 2 6 6% 5

1 1% 1

1 1% 1

3 5 5% 3

1 1% 1

1 1 1% 1

1 1 2 14 15% 12

10 3 0 4 0 17 95 100%

95
Sort SpeciesName

11/8/2005

11/22/2005

1/9/2006

1/30/20062/13/20062/27/20063/13/2006

#N/A #N/A Alabama shad

66 Dorosoma petenense threadfin shad 7 7

68 Cyprinus carpio common carp

68 Notropis texanus weed shiner 6.1

81 Ictalurus punctatus channel catfish 1 5.2

81 Pylodictis olivaris flathead catfish 8

131 Lepomis auritus redbreast sunfish

131 Lepomis cyanellus green sunfish

131 Lepomis marginatus dollar sunfish

131 Micropterus salmoides largemouth bass

132 Etheostoma swaini Gulf darter

132 Percina nigrofasciata blackbanded darter

999 Crayfish, unidentified crayfish 7 0

SUM 7 8 7 0 0 8 11.3
2/27/2006

3/13/20063/27/20064/10/20064/24/2006

5/8/2006

5/22/2006

6/5/2006

6/19/20067/10/20067/24/2006

8/7/2006

8/21/20069/25/2006

10/23/2006

114

53.6 18.5 9 5 61.7

13.6

25.5 5 16 20 12.6 1 1.2 3 2 7 12

3.2 1

196.7 130 90 3 17.6

25

10

1 4.1 11

1

1

44 1 4 17 6 7 1 2 0 43

79.1 15 60 47 4 226.3 26.5 159.1 119 114 12 15 123.3
9/25/2006

10/23/2006

Sum % of Total

114 11%

161.8 16%

13.6 1%

6.1 1%

111.5 11%

12.2 1%

437.3 42%

25 2%

10 1%

16.1 2%

1 0%

1 0%

132 13%

1041.6 100%
GeoSyntec Consultants

Common Name

Number of 

organisms %

Biomass 

kg %

Number of 

organisms %

Alabama shad 7 7% 114.0 11%

blackbanded darter 1 1% 1.0 0%

channel catfish 24 25% 111.5 11%

common carp 1 1% 13.6 1%

crayfish 14 15% 132.0 13%

dollar sunfish 1 1% 10.0 1%

flathead catfish 3 3% 12.2 1%

green sunfish 1 1% 25.0 2%

Gulf darter 1 1% 1.0 0%

largemouth bass 5 5% 16.1 2%

redbreast sunfish 6 6% 437.3 42%

threadfin shad 28 29% 161.8 16%

weed shiner 3 3% 6.1 1%

TOTAL 95 1,042

TABLE xxx. NUMBER AND BIOMASS OF ORGANISMS COLLECTED DURING THE PLANT MITCHELL

 IMPINGEMENT STUDY, OCTOBER 2004-SEPTEMBER 2005

Impingement Study Community Study

GK3396/GA060020/EPA-HQ-OW-2008-0667-DRAFT-2712.xls Page 1 of 1
GeoSyntec Consultants

Common Name

Number of 

organisms %

Biomass 

kg %

Number of 

organisms 95% UCL **

channel catfish 12 41% 52.7 27% 365 917

crayfish 4 14% 51.0 26% 122 306

dollar sunfish 1 3% 10.0 5% 30 76

flathead catfish 1 3% 8.0 4% 30 76

threadfin shad 8 28% 67.6 35% 243 612

weed shiner 3 10% 6.1 3% 91 229

TOTAL 29 195 882 2,217

* Annual estimate based on assumption that plant operates at full capacity () 365 days per year.

** 95% UCL calculated using FLUCL tool; non-parametric Chebyshev UCL used.

TABLE xxx. NUMBER AND BIOMASS OF ORGANISMS COLLECTED DURING THE PLANT MITCHELL

 IMPINGEMENT STUDY, NOVEMBER 2005-APRIL 2006 (50% COMPLETE)

Impingement Study Annual Estimate *

GK3396/GA060020/EPA-HQ-OW-2008-0667-DRAFT-2712.xls Page 1 of 1
Species SpeciesName SORT Family SORT

Anguilla rostrata threadfin shad 66 Clupeidae 66

Myrophis punctatus weed shiner 68 Cyprinidae 68

Anchoa hepsetus flathead catfish 81 Ictaluridae 81

Anchoa mitchilli channel catfish 81 Ictaluridae 81

Opisthonema oglinum dollar sunfish 131 Centrarchidae 131

Brevoortia tyrannus tadpole 999 Not a fish 999

Notemigonus crysoleucas crayfish 999 Not a fish 999

Ameiurus nebulosus Corbicula 999 Not a fish 999

SpeciesName

Count

OfTot

alLen

gth

MinOfTotalLe

ngth MaxOfTotalLength

dollar sunfish 1 77 77.000

green sunfish 1 117 117.000

largemouth bass 5 43 88

redbreast sunfish 6 57 209.000

Alabama shad 7 116 133.000

threadfin shad 28 51 135.000

common carp 1 124 124

weed shiner 3 47 72.000

channel catfish 24 41 121.000

flathead catfish 3 48 107.000

blackbanded darter 1 55 55.000

Gulf darter 1 47 47.000

crayfish
Common Family Name

Herrings Dorosoma petenense

Carps and Minnows Notropis texanus

Catfishes Pylodictis olivaris

Catfishes Ictalurus punctatus

Sunfishes Lepomis marginatus

Tadpole, unidentified

Crayfish, unidentified

Corbicula fluminea

AvgOfTotalLength Family

77 Centrarchidae

117 Centrarchidae

62.4 Centrarchidae

130.3333333 Centrarchidae

123.5714286 Clupeidae

81.57142857 Clupeidae

124 Cyprinidae

60.66666667 Cyprinidae

73.45833333 Ictaluridae

77 Ictaluridae

55 Percidae

47 Percidae