August 1982 Data Set - Maine...36 35 34 33 32 31 30 29 28 River Mile 0 6.2 5.9 5.5 4.5 5.2 4.8 1.1...

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Figure 21 - Calibration of Upper Androscoggin River PO4-P Uptake Rate

August 1982 Data Set

0

5

10

15

20

25

30

35

40

45

50

VirginiaBridge

Dixfield Canton Riley Dam LivermoreFalls

TwinBridges

Sample Location

PO

4-P

(pp

b) Data Low

Data Ave

Data High

Model w/p-uptake = .25

Model wo/P-Uptake

August 1982 Data Set

0

5

10

15

20

25

30

35

40

45

50

Berlin Gorham Gilead Virginia Bridge Dixfield Canton Riley Dam Livermore Falls Twin Bridges

Data Low

Data Ave

Data High

Model w/p-uptake = .50

Model wo/P-Uptake

Androscoggin River Modeling Report - May 2002DEPLW2001-11

Page 41

Figure 22TSS Calibration Summer 1989

Kr = .10 /day

0

2

4

6

8

10

12

14

25456585105125

River Mile

TS

S (p

pm

)

Model

Data High

Data Ave

Data Low

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 48

Figure 23

Origin of Sediment Oxygen Demand in Gulf Island PondBy Source

0

0.5

1

1.5

2

2.5

3

3.5

41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26

River Mile

SO

D (

gm

/m^

2-d

ay)

NPS/Background Point Source Unknown PS Incremental Potential*

*The increment SOD would increase with point sources discharging licensed flow and TSS at actual TP concentrations.

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 49

Figure 24Origin of Sediment Oxygen Demand in Gulf Island Pond

By Pollutant Parameters

0

0.5

1

1.5

2

2.5

3

41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26

River Mile

SO

D (

gm

/m^

2-d

ay)

UnknownAlgaeNon-Algal TSS

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 50

Figure 25Sediment Oxygen Demand Used in Model Prediction Runs

0

0.5

1

1.5

2

2.5

3

3.5

2628303234363840

River Mile

SO

D (

gm

/m^

2-d

ay)

PS=0

Mills=0

PS TP = 40%

PS TP = 67%

PS=Actual

PS=License

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 51

Figure 26 - Diurnal Dissolved Oxygen Vs Chlorophyll A Regression

0

0.5

1

1.5

2

2.5

3

0 10 20 30 40 50 60

Chlorophyll a (ppb)

DIu

rnal D

O R

ang

e (pp

m)

Adj Diurnal Data

Regression

Diurnal DO Range (due to chl a) = 0.03 x (Chl a) +0.22

Adj Diurnal Data = Monitor diurnal DO data adjusted so that the daily minimum occurs in the early AM and the daily maximum occurs in PM.

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 60

L. Narrows

07

GIPOP

3.5

7.1

37

7 7 6.9

Assumed position of thermocline

Nez

insc

ot R

iver

39

7.2

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

4041

7.2

10.1

10

7

6.6

6.2 11.6

10

30

20

7.2

6.7

6.8 8.8 8.5 8.1

9.19.5

9.2 8.6

38 33 32 31

5.2

8.9

8.2

8.4

7.9

8.1

7.16.8

8.1

River Mile36 35 34 2730 29

8

28

8.6

9.6

7.7 7.7

8.1 8 7.8

7.8

6.6

50 Dep

th (

ft)40

70

60

Figure 27 - Model Prediction of Minimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 0a - Point Sources at Zero Discharge with GIPOP

The entire volume of Gulf Island Pond meets minimum Class C dissolved oxygen criteria (5 ppm).

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 62

Model non-attainment segment with predicted dissolved oxygen (ppm)

7

L. Narrows

0

Assumed position of thermocline

Figure 28 - Model Prediction of 30-Day Average Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 0a - Point Sources at Zero Discharge with GIPOP

1% of the volume of Gulf Island Pond does not meet the monthly mean Class C dissolved oxygen criteria (6.5 ppm).

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 63

Model non-attainment segment with predicted dissolved oxygen (ppm)

7.4

70

60

7

50 Dep

th (

ft)40

8.4

28

9

9.9

8.2 8.2

8.5 8.3 8.2

8.4

River Mile36 35 34 2730 29

5.6

9.2

8.6

8.8

8.2

8.5

7.57.2

8.5

38 33 32 31

7.7

7

7.3 9.3 9 8.6

9.49.8

9.6 8.9

10

30

20

10.4

10.3

7.4

7

6.6 11.8

39

7.7

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

4041

7.8

Nez

insc

ot R

iver

7.6

GIPOP

3.5

7.7

37

7.6 7.5 7.5

L. Narrows

07

3.5

7.1

37

7 7 6.9

Assumed position of thermocline

Nez

insc

ot R

iver

39

7.2

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

4041

7.2

5.3

6.7

6.9

6.8

6.3 6.3

10

30

20

7.2

2.6

6.9 6.9 6.8 6.8

6.46.5

5.9 6

38 33 32 31

2.3

5.5

5.8

5.3

4.8

5.3

4.63.5

4.4

River Mile36 35 34 2730 29

5.7

28

4.5

5.1

6.8 6.5

6.5 6.3 6.1

6.8

2.2

50 Dep

th (

ft)40

70

60

Figure 29 - Model Prediction of Minimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 0b - Point Sources at Zero Discharge without GIPOP

10% of the volume of Gulf Island Pond does not meet minimum Class C dissolved oxygen criteria (5 ppm).

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 64

Model non-attainment segment with predicted dissolved oxygen (ppm)

7

L. Narrows

0

Assumed position of thermocline

Figure 30 - Model Prediction of 30-Day Average Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 0b - Point Sources at Zero Discharge without GIPOP

29% of the volume of Gulf Island Pond does not meet the monthly mean Class C dissolved oxygen criteria (6.5 ppm).

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 65

Model non-attainment segment with predicted dissolved oxygen (ppm)

7.4

70

60

2.6

50 Dep

th (

ft)40

6.1

28

4.9

5.5

7.3 7.1

6.9 6.8 6.5

7.4

River Mile36 35 34 2730 29

2.7

6

6.2

5.7

5.2

5.7

53.9

4.8

38 33 32 31

7.7

3.1

7.4 7.4 7.4 7.3

6.97

6.3 6.5

10

30

20

5.8

7.1

7.4

7.2

6.8 6.7

39

7.7

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

4041

7.8

Nez

insc

ot R

iver

7.6

3.5

7.7

37

7.6 7.5 7.5

L. Narrows

04.8

GIPOP

3.5

4.8

37

4.8 4.8 5

Assumed position of thermocline

Nez

insc

ot R

iver

39

4.8

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

4041

4.8

4.9

7.4

4.6

3.9

2.7 8

10

30

20

4.8

0

5.1 7.6 7.3 6.7

66.6

4.9 4.5

38 33 32 31

0

3.9

3.7

3

1.9

2.7

1.20

1.7

River Mile36 35 34 2730 29

3.3

28

2.5

4.1

6 5.5

5.4 4.7 4.1

6.2

0

50 Dep

th (

ft)40

70

60

Figure 31 - Model Prediction of Mimimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 1a - Current Licensed Loading of Point Sources with GIPOP

55% of the volume of Gulf Island Pond does not meet minimum Class C dissolved oxygen criteria (5 ppm).

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 66

Model non-attainment segment with predicted dissolved oxygen (ppm)

4.7

L. Narrows

0

Assumed position of thermocline

Figure 32 - Model Prediction of 30-Day Average Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 1a - Current Licensed Loading of Point Sources with GIPOP

72% of the volume of Gulf Island Pond does not meet the monthly mean Class C dissolved oxygen criteria (6.5 ppm).

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 67

Model non-attainment segment with predicted dissolved oxygen (ppm)

5.8

70

60

0

50 Dep

th (

ft)40

4.6

28

3.7

5.3

7.1 6.6

6.4 5.8 5.2

7.4

River Mile36 35 34 2730 29

0

5.2

5

4.3

3.2

4

2.40.6

2.9

38 33 32 31

6

0

6.3 8.7 8.5 7.9

7.17.6

6.1 5.8

10

30

20

6.1

8.4

5.6

5

3.9 9

39

6

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

4041

6

Nez

insc

ot R

iver

6

GIPOP

3.5

6

37

6 6 6.2

L. Narrows

0

Assumed position of thermocline

9.8

35' attainment

50' non-attain.

7.2 7.1 6.6

monitor 99-00

5' attainment

20' attainment

70' non-attain. anaerobic

5.6

2.1

4.2

6.1

5.9

5.4

4.5

Dep

th (

ft)40

6.5

70

0.5

50

60

8.2 7.89

27

7 6.7

6.9 6.4

7.2

6

River Mile36 35 34 33 32 31 30 29 28

0

6.2

5.9

5.5

4.5

5.2

4.8

1.13.6

6.3 8.7 8.3 7.7

41

5.8

10

30

40

20

65.8

3839

5.8

11% of the volume of Gulf Island Pond does not meet minimum Class C dissolved oxygen criteria (5 ppm).

Nez

insc

ot R

iver

6

GIPOP

U. Narrows

3.5

5.9

37

5.9

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 68

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

6.2

Figure 33 - Model Prediction of Mimimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 2a - Point Sources at Actual Discharge Levels with GIPOP

35' attainment

50' non-attain.

monitor 99-00

5' attainment

20' attainment

70' non-attain.

L. Narrows

0

Assumed position of thermocline

Nez

insc

ot R

iver

6.9 9.2 8.5 8

GIPOP

3.5

6.8 6.9 7.1 7.2 9.5

10.4

20% of the volume of Gulf Island Pond does not meet monthly average Class C dissolved oxygen criteria of 6.5 ppm

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

20

6.7

3839

6.7 6.8

3741

6.7

10

30

Dep

th (

ft)

40

40

0.7

7.1

6.8

6.4

5.4

6.1

2.14.63.1

River Mile36 35 34 33 32 31 30 29 28 27

7.8 7.6

7.6 7.1

7.4

6.8

Figure 34 - Model Prediction of 30-Day Dissolved Oxygen Non-Attainment in Gulf Island Pond

5.3

9.6 8.9 8.4

5.2

Run 2a - Point Sources at Actual Discharge Levels with GIPOP

6.4

1.5

50

60

7.3

5.8

70' non-attain. anaerobic

monitor 99-00

35' attainment DO = 6.6

20' attainment DO = 7.2

5' attainment DO = 8.0

50' non-attain. DO = 5.8

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 69

8 7.86.6

6.2

Model non-attainment segment with predicted dissolved oxygen (ppm)

6.8

70

70' non-attain.

monitor 99-00

35' attainment

20' attainment

5' attainment DO

50' non-attain. DO

L. Narrows

0

Assumed position of thermoclineAndroscoggin R

iver Modeling R

eport - May 2002 - P

age 70

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

6.1

Figure 35 - Model Prediction of Mimimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 3a - Point Sources BOD/TSS at Actual Discharge Levels & Point Source TP at 2/3 Current Levels with GIPOP

7% of the volume of Gulf Island Pond does not meet minimum Class C dissolved oxygen criteria (5 ppm).

Nez

insc

ot R

iver

6

GIPOP

U. Narrows

3.5

5.9

37

5.9 65.8

3839

5.8

41

5.8

10

30

40

20

6.2 8.4 8 7.4

0.7

6.5

6.2

5.9

5

5.6

5.4

24.2

River Mile36 35 34 33 32 31 30 29 28 27

7 6.7

6.9 6.5

7.1

6.28.2 7.88.9

70

1.6

50

60

Dep

th (

ft)40

6.9

6

5.9

5.4

4.6 9.95.8

2.9

4.8

7.6 7.3 6.8

L. Narrows

0

Assumed position of thermocline

10.5 8.3 8 7.5 6.8

3.9

5.7

6.7

6.6

6.1

5.4

Dep

th (

ft)40

7.7

70

2.5

50

60

8.9 8.59.5

27

7.8 7.5

7.6 7.2

7.9

6.9

River Mile36 35 34 33 32 31 30 29 28

1.7

7.4

7

6.8

5.8

6.4

6.3

35.1

7.1 9.3 8.9 8.3

41

6.7

10

30

40

20

6.96.7

3839

6.7

15% of the volume of Gulf Island Pond does not meet the monthly mean Class C dissolved oxygen criteria (6.5 ppm).

Nez

insc

ot R

iver

6.8

GIPOP

U. Narrows

3.5

6.8

37

6.8

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 71

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

7

Figure 36 - Model Prediction of 30-Day Average Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 3a - Point Sources BOD/TSS at Actual Discharge Levels & Point Source TP at 2/3 Current Levels with GIPOP

L. Narrows

0

Assumed position of thermocline

10 8 7.5 7 6.2

4

5.6

5.9

5.8

5.4

4.7

Dep

th (

ft)40

7.4

70

3.1

50

60

8.2 7.88.9

27

7 6.8

7 6.7

7.1

6.4

River Mile36 35 34 33 32 31 30 29 28

1.9

6.9

6.5

6.3

5.6

6

6.2

44.8

6 8.1 7.8 7.4

41

5.8

10

30

40

20

5.95.8

3839

5.8

6% of the volume of Gulf Island Pond does not meet minimum Class C dissolved oxygen criteria (5 ppm).

Nez

insc

ot R

iver

5.9

GIPOP

U. Narrows

3.5

5.9

37

5.9

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 72

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

6

Figure 37 - Model Prediction of Mimimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 4a - Point Sources BOD/TSS at Actual Discharge Levels & Point Source TP at 40% Current Levels with GIPOP

L. Narrows

0

Assumed position of thermoclineAndroscoggin R

iver Modeling R

eport - May 2002 - P

age 73

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

6.8

Figure 38 - Model Prediction of 30-Day Average Dissolved Oxygen Non-Attainment in Gulf Island Pond Run 4a - Point Sources BOD/TSS at Actual Discharge Levels & Point Source TP at 40% Current Levels with GIPOP

9% of the volume of Gulf Island Pond does not meet the monthly mean Class C dissolved oxygen criteria (6.5 ppm).

Nez

insc

ot R

iver

6.8

GIPOP

U. Narrows

3.5

6.7

37

6.7 6.86.7

3839

6.7

41

6.7

10

30

40

20

6.7 8.8 8.5 8.1

2.9

7.7

7.3

7.2

6.5

6.9

7.1

55.7

River Mile36 35 34 33 32 31 30 29 28 27

7.7 7.5

7.6 7.4

7.8

7.18.8 8.59.4

70

4

50

60

Dep

th (

ft)40

8.1

6.6

6.5

6.1

5.4 10.67

5

6.5

8.7 8.2 7.7

L. Narrows

0

Assumed position of thermocline

For 10%, 25%, and 50% of actual BOD and TSS discharge levels, respectively ; 1%, 2%, and 4% of the volume of Gulf Island Pond does not meet minimum Class C dissolved oxygen criteria (5 ppm).

5 / 4.6 / 3.8

4.3

5.4 / 5

3.5 / 3.1 2.3

6.1 / 5.8 5.2

70

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 74

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

6.9 / 6.8 / 6.5

Figure 39 - Model Prediction of Mimimum Dissolved Oxygen Non-Attainment in Gulf Island Pond Runs 5a,b,c - Point Sources BOD/TSS at 10% / 25% / 50% of Actual Discharge Levels & Point Source TP at 40% Current Levels with GIPOP

Nez

insc

ot R

iver

6.8 / 6.7 / 6.56.9 / 6.8

6.5

3839

6.9 / 6.8 / 6.5

41

6.9 / 6.8 / 6.6

GIPOP

U. Narrows

3.5

6.9 / 6.8 / 6.5

37

6.9 / 6.7 / 6.5 6.8 / 6.7 / 6.5 6.8 / 6.7 / 6.4 8.9 / 8.7 / 8.5

9.8 / 9.7 / 9.4

10

30

40

20

7.5 / 7.2 / 6.6

8 / 7.8 / 7.4

8.4 / 8.3 / 8.1 8 / 7.8 / 7.6

8.1 / 7.8 / 7.4

9.2 / 9 / 8.7 8.8 / 8.6 / 8.2

River Mile36 35 34 33 32 31 30 29 28 27

7.5 / 7.4 7.2

7.4 / 7.2 7

7.8 / 7.6 / 7.37.5 / 7.3

7

7.7 / 7.5 / 7.3

7.3 / 7.1 6.7

6.9 / 6.8 / 6.5 6.4 / 6.2 / 5.9

60

4.7 / 4.3 / 3.6

50 Dep

th (

ft)40

8.7 / 8.4 / 86.8 / 6.6 6.4

8.6 / 8.4 / 85.8 / 5.6 / 5.3 11 / 11 / 10.6 9.3 / 9 / 8.6 7.3 / 7

6.6

7 / 6.6 66.9 / 6.6

6

7.3 / 7 6.4

7.6 / 7.3 6.9

7.6 / 7.3 6.8

L. Narrows

0

Assumed position of thermocline

9.6 / 9.4 / 9.1

9.1 / 8.9 / 8.67.2 / 7.1 6.9

9 / 8.8 / 8.6

6.3 / 6 / 5.5 6.2 / 5.9 5.4

6.7 / 6.5

6.1

6.2 / 6.1 / 5.9 11.4 / 11.2 / 11

60

Dep

th (

ft)40

5.4 / 5.1 / 4.6

50

9.5 / 9.4 / 9.2 9.1 / 9 / 8.810.1 / 10 / 9.77.3 7.2 / 7 6.8 / 6.6 / 6.5

27

8.1 / 8 7.8

8 / 7.9 7.7

8.2 / 8 / 7.88 / 7.8

7.6

8.2 / 8.1 / 8

7.8 / 7.6 7.4

River Mile36 35 34 33 32 31 30 29 28

7.5 / 7.3 6.9

7.8 / 7.6 7.2

8.2 / 8 / 7.6

8.5 / 8.3 / 87.8 / 7.6

7.3

7.6 / 7.4 7

8.6 / 8.4 / 8.1

8 / 7.9 7.6

8.1 / 7.9 7.6

7.3 / 7.2 / 7.1 9.3 / 9.2 / 9.1 9 / 8.8 / 8.7 8.5 / 8.4 / 8.3

41

7.5 / 7.4 / 7.3

10

30

40

20

7.5 / 7.4 7.2

3839

7.5 / 7.4 / 7.2

Nez

insc

ot R

iver

7.4 / 7.3 / 7.2

GIPOP

U. Narrows

3.5

7.5 / 7.4 / 7.2

37

7.4 / 7.3 / 7.2 7.4 / 7.3 / 7.1

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 75

Model non-attainment segment with predicted dissolved oxygen (ppm)

Deep HoleGIP4Turner BridgeTwin Bridges

7.4 / 7.3 / 7.2

Figure 40 - Model Prediction of 30-Day Average Dissolved Oxygen Non-Attainment in Gulf Island Pond Runs 5a,b,c - Point Sources BOD/TSS at 10% / 25% / 50% of Actual Discharge Levels & Point Source TP at 40% Current Levels with GIPOP

For 10%, 25%, and 50% of actual BOD and TSS discharge levels, respectively ; 4%, 4%, and 6% of the volume of Gulf Island Pond does not meet the monthly mean Class C dissolved oxygen criteria (6.5 ppm).

4.3 / 3.9 3.4

70

Figure 41Gulf Island Pond Predicted Chlorophyll a

0

2

4

6

8

10

12

14

16

18

20

2628303234363840

River Mile

Ch

l a (

pp

b)

All PS=0

Mills=0

PS=Lic

PS=Actual

PS TP 67%

PS TP = 40%

Algae Bloom ThresholdT

urne

r B

ridge

Upp

er N

arro

ws

Gul

f Is

land

dam

Low

er N

arro

ws

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 76

L. Narrows

0

70

3233

50

60

27 River Mile36

Measured non-attainment area

29 2835 34

Location of thermocline

Deep Hole

Dep

th (

ft)40

40

20

31 3041

10

30

GIP4Turner BridgeTwin Bridges U. Narrows

39 3738

Non-Attainment Volume = 10%

Hypolimnetic Volume < 1%

Figure 42 - Measured Non-Attainment of Minimum Dissolved Oxygen in Gulf Island PondJuly 6, 1999

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 77

Nez

insc

ot R

iver

GIPOP

L. Narrows

0

Nez

insc

ot R

iver

GIPOP

333839 37

Deep HoleGIP4Turner BridgeTwin Bridges U. Narrows

41

10

30

40

20

Dep

th (

ft)40

Measured non-attainment area

29

Location of thermocline

2830 27 River Mile36 3135 34 32

50

60

Androscoggin R

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eport - May 2002 - P

age 78

Non-Attainment Volume = 23%

Hypolimnetic Volume < 1%

Figure 43 Measured Monthly Average Non-Attainment of Dissolved Oxygen in Gulf Island Pond July 1999

70

Figure 44Component Analysis of Dissolved Oxygen Impact

At Various Depths from Lower Narrows to Gulf Island Dam

-8.00

-6.00

-4.00

-2.00

0.00

2.00

4.00

5' 15' 25' 35' 45' 55' 65'

Depth (ft)

Disso

lved O

xygen

Imp

act

GIPOP SOD Algae P-R PS CBOD* NPS CBOD

*GIPOP is instream aeration 5 miles up river .

Androscoggin R

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eport - May 2002 - P

age 81

Figure 45Component Analysis as % of Impact

Average Lower Narrows to Gulf Island Dam

-80.00%

-60.00%

-40.00%

-20.00%

0.00%

20.00%

40.00%

60.00%

80.00%

100.00%

5' 15' 25' 35' 45' 55' 65'

Depth (ft)

% o

f Imp

act

GIPOP

SOD

Algae P-R

PS CBOD*

NPS CBOD

*GIPOP is instream aeration 5 miles up river .

Androscoggin R

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eport - May 2002 - P

age 82

Figure 46 Source of Pollutants Entering Gulf Island Pond

Total Suspended Solids

Background and NPS64%

P&P America8%

Mead Paper Co.6%

International Paper Co.21%

Municipal WWTP's1%

Ultimate CBOD

Background and NPS15%

P&P America27%

Mead Paper Co.32%

International Paper Co.24%

Municipal WWTP's2%

Total Phosphorus

Background and NPS10%

P&P America Paper Co17%

Berlin, NH6%

Gorham, NH2%

Bethel, ME0%

Mead Paper Co25%

Rumford-Mexico, ME2%

International Paper Co35%

Livermore Falls, ME3%

Androscoggin River Modeling Report - May 2002Page 83

L. Narrows

028

6.3 / 6.7 / 7.1

5.4 / 5.9 / 6.4

7.7 / 8.2 / 8.7

30 2931

60

6.6 / 7.6 / 8.5 5.9 / 7 / 87.1 / 8.2 / 9.3

0.5 / 4.7 / 8.8

50

Figure 47 Sediment Oxygen Demand Sensitivity Analysis

4.5 / 5.4 / 6.3

4.2 / 6.3 8.4

Point Sources at Actual Discharge Levels with GIPOP at Full Capacity

4.8 / 7 / 9.1

River Mile

2.1 / 4.8 / 7.6

4.5 / 6.2 7.9

5.6 / 6.6 7.7

27

7 / 7.5/ 7.9

40

3941

5.8 / 5.8 / 5.9

Dep

th (

ft)

40

20

0 / 3.1 6.5

1.1 / 4.7 / 8.4

70

33 32

30

10

5.9 / 6.3 / 6.7

6.1 / 6.4 / 6.8

U. Narrows

8.5 / 8.7 / 8.9

6 / 6.4 / 6.7 6.2 / 6.5 / 6.9

Model predicted daily minimum dissolved oxygen (ppm) at 100% / 50% / 0% of SOD

6.7 / 7.3 7.9

7.2 / 7.7 / 8.2

3436 35

5.8 / 5.9 /6

38 37

5.9 / 6.2 / 6.4

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 85

GIPOP

The predicted dissolved oxygen in the deeper portions of Gulf Island Pond is very sensitive to changes in the sediment oxygen demand rate.

Deep HoleGIP4Turner BridgeTwin Bridges

Nez

insc

ot R

iver

L. Narrows

0

GIPOP

The predicted model dissolved oxygen is less sensitive to reductions of mill BOD than reductions of sediment oxygen demand.

Deep HoleGIP4Turner BridgeTwin Bridges

Nez

insc

ot R

iver Model predicted minimum dissolved oxygen (ppm) at Licensed BOD (1.8xActual) / Actual

BOD Levels / 50% Actual BOD Levels / Zero Discharge8.5 / 8.7 / 8.9 9.4

20

37

5.2 / 5.9 / 6.4 7

39

U. Narrows

5.3 / 6 / 6.5 7.1 5.5 / 6.2 / 6.6 7.25 / 5.8/ 6.4

7.0

38

5.7 / 6.3 / 6.7 7.2

32 3141

4.9 / 5.8 / 6.4 / 7.1

10

30

Dep

th (

ft)

40

40

0 / 0 / 0.6 1.5

0 / 1.1 / 1.9 / 2.8

1 / 2.2 / 3 3.9

3.3 / 4.5 5.2 / 6

30 2936 35 34 33

4.6 / 5.6 6.2 / 6.9

3.7 / 4.8 / 5.6 6.4

River Mile27

6.6 / 7 7.3 / 7.6

6.5 / 7 /7.3 7.7

28

6.9 / 7.2 / 7.5 7.8

60

4.9 / 5.9 6.6 / 7.2

4.6 / 5.4 / 6 6.6

50

6.1 / 7.1 / 7.7 8.3

Figure 48 Paper Mill BOD Sensitivity Analysis

3.7 / 4.5 / 5 / 5.7

3 / 4.2/5.1 5.9

GIPOP at Full Capacity

6.3 / 6.9 / 7.3 7.8

0 /0 .5 / 1.4 / 2.3

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 86

7.4 / 7.7 / 8 8.4

70

5.3 / 6.1 / 6.6 7.2

5.2 / 5.9 / 6.4 7

L. Narrows

5.5 / 5.5 / 5.5

28

7.7 / 7 / 6.3 7.2 / 6.7 / 6.2

32 31

70

.5 / 0 / 0

60

Figure 49 GIPOP Sensitivity Analysis

4.5 / 4.5 / 4.5

4.2 / 2.6 1.3

Point Sources at Actual Discharge Levels

6.6 / 5.3 / 4.1

5.9 / 5.9 / 5.9

6 / 6 / 6

River Mile

5.6 / 4.5 3.4

5.9 / 4.7 3.6

7.1 / 5.4 / 3.8

27

6.7 / 6.2 5.6

0 / 0 / 0

1.1 / 0 / 02.2 / 0.8 0

4.5 / 3.1 1.9

4.8 / 3 / 1.5

7 / 6.6 / 6.1

30 2936 35 34 33

Twin Bridges

41

5.8 / 5.8 / 5.8

40

U. Narrows

6 / 6 / 6 6.2 / 6.2 / 6.25.8 / 5.8

5.8

38

6.3 / 6.3 / 6.3

Model predicted dissolved oxygen (ppm) at 100% / 50% / 0% capacity of GIPOP injection rate

37

5.9 / 5.9 / 5.9

39

Androscoggin R

iver Modeling R

eport - May 2002 - P

age 87

GIPOP

Deep HoleGIP4Turner Bridge

Nez

insc

ot R

iver

8.5 / 8.7 / 8.9 9.4