Figure 1.Layout of Mill Sewer System Showing Sample Locations

PM 4 & 5

PM 1 & 2

PRIMARYCLARIFIERS

GROUNDWOOD

B PULPMILL

WOODROOM

RINGDEBARKER

OTIS MILLSEWER

BARSCREEN

RECAUST

PCC PLANT

B EVAPS A EVAPS

LANDFILL

WATERTREATMENT

GENERAL SEWER

TORIVER

ACID SEWER

CENTRAL SEWER

ACID SEWER

3

9

8

7

10

13

18145

PM 3 &Coating

Prep.

17 15

CENTRAL SEWER

RiverWater

2

6

LAGOONSECONDARYCLARIFIERS

1

Caustic SewerAcid Sewer

A PULPMILL

12 11

16

Table 1.Sample Location and Flow Measurement Identification

SAMPLE FLOWNumber Description Measured Estimated

1 Final mill effluent – Composite Sample X2 Raw water intake – Grab Sample X3 Raw water waste – Grab Sample X

5* Otis waste water – Composite Sample X6 Mill sewer after bar screen – Composite Sample X7 Effluent of paper machines 1 plus 2 – Composite

SampleX

8 Effluent of paper machine 3 plus coating prep. –Composite Sample

X

9 Effluent of paper machines 4 plus 5 – Composite X10 Groundwood mill effluent - Composite Sample X11 Caustic sewer of A pulp mill - Composite Sample X12 General sewer of A pulp mill – Composite Sample X13 Acid sewer – Grab Sample X14 Caustic sewer of B pulp mill – Grab Sample X15 Evaporators effluent of A pulp mill – Grab Sample X16 Evaporators effluent of B pulp mill – Grab Sample X17 6th effect evaporator plus surface condenser effluent

of B pulp mill – Grab SampleX

18 General sewer of B pulp mill – Composite Sample X*Sample four (4) is non-existent

Table 2.XL-2 Sewer Survey (2001)

INTERNATIONAL PAPER COMPANY, ANDROSCOGGIN MILLSample Point ISCO Sampler

PresentFlow

MeasurementDevice

Available

Color,pH1

Toxicity2 TSS, VSS, Ash,Conductivity, BOD

(filtered/ unfiltered),COD

(filtered/unfiltered)2

Comments3

PM 1 & 2 (near main lab) ü xx ü xx ü xx ü xx PM 1 & 2 General Sewer (insideparshall flume house)

ü xx ü xx ü xx Flow meter requires calibration.Sampler not presently at site.

PM 1 & 2 Caustic Sewer(inside parshall flume house)

ü xx ü xx ü xx Flow meter requires calibration.Sampler not presently at site.

PM 3 & Coating Prep ü xx ü xx ü xx ü xx ü xx PM 4 & 5 ü xx ü xx ü xx ü xx A Pulp Mill General Sewer(inside parshall flume house)

ü xx ü xx ü xx ü xx Flow meter requires calibration.

A Pulp Mill Caustic Sewer(inside parshall flume house)

ü xx ü xx ü xx ü xx Flow meter requires calibration.Sampler not presently at site.

B Pulp Mill General Sewer ü xx ü xx ü xx ü xx B Pulp Mill Caustic Sewer ü xx ü xx grab sample Groundwood ü xx ü xx ü xx ü xx Evaporators ü xx ü xx grab sample Acid Sewer ü xx ü xx ü xx Acid sewer sample point now

available at waste treatment. Otis ü xx ü xx ü xx ü xx Water Treatment ü xx ü xx ü xx grab sample Total Mill (Bar Screen) ü xx ü xx ü xx ü xx ü xx Mill Effluent ü xx ü xx ü xx ü xx

NOTES:1) pH and color to be completed by International Paper2) Toxicity, TSS, VSS, ash, conductivity, BOD, COD to be completed by external laboratory3) In all cases listed, John will follow-up and get flow meters calibrated. Travis will follow-up and have ISCO samplers, or other means of sampling, available for the survey.4) Digital photos to be taken of all sewer samples5) 3, 24 hour composite samples to be taken at each location with an ISCO composite sampler6) 3 grab samples, taken each day of the survey at approximately 7:00am, will be taken at locations with no ISCO sampler7) Mill production rates to be recorded by Travis Flagg during the survey

Table 3.Average Daily Emissions (lbs/Day) for Measured Quantities

Flow Rate BOD COD BOD COD Susp. Diss. Est. TotalLocation (gpm)

(2) Raw Water - Grab 29028 6170 21305 5821 13155 4773 30152 34925 2328

(8) PM #3 & Coating Prep - Composite 3492 4565 74780 2591 6134 47346 21384 68730 6750(9) PM #4 & #5 - Composite 2065 5747 44715 629 4157 24941 5548 30489 18383(7) PM #1& #2 - Composite 5036 7574 54691 2100 5453 34313 24316 58629 929

Paper Mill Total 10592 17885 174185 5320 15743 106600 51248 157848 26062

(12) A Pulp Mill (general) - Composite 1836 3881 17911 3174 13831 759 23516 24274 16018(11) A Pulp Mill (caustic) - Composite 630 5789 23296 5748 22184 222 41918 42140 14162(18) B Pulp Mill (General)- Composite 223 2479 14885 481 2578 10347 2931 13278 5475(14) B Pulp Mill (caustic) - Grab 656 8998 18496 7014 16391 800 17943 18743 4025(13) Acid Sewer - Grab 2620 6431 24252 5769 21793 462 65568 66031 10245(15) A Evaporators - Grab 800 9051 16459 8422 12577 64 603 667 337(16) B Evaporators - Grab 494 937 2088 644 1320 38 164 202 258(17) B Evaporators 6th & SC - Grab 310 4998 7410 4066 6652 5 469 474 298

BL Cycle Total 7075 41627 122709 34674 96006 12659 152948 165607 50561

(10) Groundwood - Composite 274 551 2140 517 1153 4269 578 4847 798(5) Otis - Composite 2371 10842 30823 4698 9701 6486 10899 17385 618(3) River Waste - Grab 347 33 1421 15 85 3010 1546 4556 153

Others Total 2993 11427 34384 5231 10939 13765 13023 26788 1569

(6) Mill Sewer (Bar Screen) - Composite 25717 87774 313139 46001 143367 212988 311282 524270 133053Sum Paper Mill, BL Cycle, Others minus Acid Sewer and B Evaporators 18040 64508 307026 39456 100895 132562 151650 284213 67946(1) Mass Closure at Bar Screen (%) 29.9 26.5 2.0 14.2 29.6 37.8 51.3 45.8 48.9

Mill Effluent - Composite 29537 3672 73328 1895 55559 11491 367115 378606 89439

(mg/L)(X)[flow(gpm)]=(#/day)where x= 0.012032

Color

(#/Day)

Total Dissolved Solids

Table 4.Mass Balances For Combined Effluent at Bar Screen

VARIABLE MEASURED(1000 lbs/day)

CALCULATED(1000 lbs/day)

DIFFERENCE(%)

Total BOD 88 65 27Dissolved BOD(a) 46 39 14

Total COD 313 307 2

Dissolved COD(a) 143 101 30

Color 133 68 49

Total Suspended Solids (TSS) 213 133 38

Dissolved Solids 311 152 51

Estimated Total Solids 524 284 46

Flow (million gallons/day) 37 26 30

(a) Samples were filtered through a 0.8 micron filter.

Figure 2Percentage Flow by Area

Calculated Total Flow in Million Gallons/Day=29.75

Black Liquor Cycle 34%

Other 15%

Paper Mill 51%

Figure 3Total COD and BOD Mass Balances - Comparison of 2000 with 2001 Trial

101

392

88

313

110

436

65

307

0

50

100

150

200

250

300

350

400

450

500

Total BOD at Bar SCreen Total COD at Bar Screen

(100

0 P

ou

nd

s/D

ay)

2000 Bar Screen

2001 Bar Screen

2000 Sum of Sources

2001 Sum of Sources

2000 Bar

Screen

2000 Bar

Screen

2001 Bar

Screen

2001 Bar

Screen

2000 Sum of Sources

2000 Sum of Sources

2001 Sum of Sources

2001 Sum of Sources

Figure 42001 Efficiency of Waste Treatment Plant

96% 96%

78%

66%

38%

95%

3%

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Total BOD DissolvedBOD

Total COD DissolvedCOD

Color SuspendedSolids

DissolvedSolids

Eff

icie

ncy

(%

)

Table 5.Removal Efficiencies in Waste Water Treatment Plant

VARIABLE INFLUENT(1000 lbs/day)

EFFLUENT(1000 lbs/day)

REMOVALEFFICIENCY

(%)Total BOD 94 3.7 96

Dissolved BOD(a) 51.8 1.9 96

Total COD 337 73 78

Dissolved COD(a) 165 56 66

Color 143 89 38

Total Suspended Solids (TSS) 214 11.5 95

Dissolved Solids 377 367 2.6

Estimated Total Solids 590 379 36

Flow (million gallons/day) 40.8 42.5

(a) Samples were filtered through a 0.8 micron filter.

Figure 5Comparison of 2001 Average Total and Dissolved BOD

6.2

17.9

41.6

11.4

88

3.75.8 5.3

34.7

5.2

46

1.9

0

10

20

30

40

50

60

70

80

90

100

Raw Water Paper MillTotal

Black LiquorCycle

Other Area Mill Sewer(Bar Screen)

Mill Effluent

BO

D (

1000

Po

un

ds/

Day

)

Total BODDissolved BOD

Table 6.COD Removal Efficiencies Due to Sample Filtration

TOTALCOD

DISSOLVEDCOD

AREA DESCRIPTION

(1000 lbs/day)

COD REMOVALEFFICIENCY BYFILTRATION (%)

Total Paper Mill 174 15.7 91Total Black Liquor Cycle 123 96 22

Total Others 34.4 10.9 68

Figure 6Comparison of 2001 Average Total and Dissolved COD

21.3

174

123

34.4

313

73.3

13.2 15.7

96

10.9

143

55.6

0

50

100

150

200

250

300

350

Raw Water Paper MillTotal

BlackLiquorCycle

Other Area Mill Sewer(Bar

Screen)

Mill Effluent

Che

mic

al O

xyge

n D

eman

d,

(100

0 P

ou

nd

s p

er D

ay)

Total CODDissolved COD

Figure 72001 Total COD by Area

Other (10%)

Paper Mill (53%)

Black Liquor Cycle (37%)

Calculated Total COD = 331,000 lbs/day

Figure 82001 Dissolved COD by Area

Other (9%)Paper Mill

(13%)

Black Liquor Cycle (78%)

Dissolved COD = 123,000 Pounds per Day

Figure 92001 Average Black Liquor Cycle Total and Dissolved COD

17.9

23.3

14.9

18.5

24.3

16.5

2.1

7.4

13.8

22.2

2.6

16.4

21.8

12.6

1.3

6.6

0

5

10

15

20

25

30

A Pulp Mill(General)

A Pulp Mill(Caustic)

B Pulp Mill(General)

B Pulp Mill(Caustic)

Acid Sewer AEvaporators

BEvaporators

BEvaporators,

6th & SC

Ch

emic

al O

xyg

en D

eman

d

(100

0 P

ou

nd

s p

er D

ay)

Total COD

Filtered COD

Figure 102001 Dissolved COD of Black Liquor Cycle

A Pulp Mill Caustic (23%)

B Pulp Mill General (3%)

Acid Sewer (23%)

A Evaps. (13%)

A Pulp Mill General Minus B

Evaporators (13%)

B Evaporators6th & SC (7%)B Evaps (1%)

B Pulp Mill Caustic (17%)

Figure 112001 (Dissolved COD - Dissolved BOD)

7.3

3.5 3.5 3.4

10

16.4

2.2

9.4

16

4.2

0.7

2.6

0.6

5

0

2

4

6

8

10

12

14

16

18

Raw

Wat

er

PM

#3

& C

oat

ing

Pre

p.

PM

#4

& P

M #

5

PM

#1

& P

M #

2

A P

ulp

Mill

Gen

eral

A P

ulp

Mill

(Cau

stic

)

B P

ulp

Mill

(Gen

eral

)

B P

ulp

Mill

(Cau

stic

)

Aci

d S

ewer

A E

vap

ora

tors

B E

vap

ora

tors

B E

vap

ora

tors

6th

& S

C

Gro

un

dw

oo

d

Oti

s

Dis

solv

ed C

OD

- D

isso

lved

BO

D10

00 P

ou

nd

s p

er D

ay

Figure 122001 (Dissolved COD - Dissolved BOD) of Black Liquor Cycle as Percentage (%)

B Pulp Mill General (4%)

A Pulp Mill Caustic (27%)

A Pulp Mill General (16%)

B Pulp Mill Caustic (15%)

Acid Sewer (26%)

A Evaporators (7%)

B Evaps (1%)

B Evaps 6th & SC (4%)

(Dissolved COD - Dissolved BOD) of Black Liquor Cycle = 61.4 (1000 Pounds per Day)

Table 7.Contribution of the Different Areas of the Pulp Mill to (Dissolved COD-Dissolved BOD) Of The Total Black Liquor Cycle

AREA DESCRIPTION DISSOLVED COD –DISSOLVED BOD

(1000 lbs/day)

PERCENTAGEOF TOTAL BL

CYCLE (%)A Pulp Mill General Sewer

(excludes B Evaporators)10.0 16

A Pulp Mill Caustic Sewer 16.4 27

B Pulp Mill General Sewer 2.2 4

B Pulp Mill Caustic Sewer 9.4 15

Acid Sewer 16.0 26

A Evaporators 4.2 7

B Evaporators 0.68 1

6th and SC of B Evaporators 2.6 4

Black Liquor Cycle 61.38 100

Figure 13Color by Area

Paper Mill (33%)

Other (2%)

Total Color = 78.2 (1000 Pounds per Day)

Black Liquor Cycle (65%)

Figure 14Color by Department

2.3

6.5

19

0.9

15.8

14.2

5.5

4

10.2

0.3 0.3 0.3 0.8 0.6

0

2

4

6

8

10

12

14

16

18

20

Raw

Wat

er

PM

#3

& C

oat

ing

Pre

p.

PM

#4

& P

M #

5

PM

#1

& P

M #

2

A P

ulp

Mill

(Gen

eral

)

A P

ulp

Mill

(Cau

stic

)

B P

ulp

Mill

(Gen

eral

)

B P

ulp

Mill

(Cau

stic

)

Aci

d S

ewer

A E

vap

ora

tors

B E

vap

ora

tors

B E

vap

ora

tors

6th

& S

C

Gro

un

dw

oo

d

Oti

s

Co

lor

(1,0

00 P

ou

nd

s p

er D

ay)

Total Color = 80.7 Pounds per Day

Figure 15Percentages (%) of 2001 Color in Black Liquor Cycle

A Pulp Mill General (31%)

Acid Sewer (20%)

B Pulp Mill Caustic (8%)

A Pulp Mill Caustic (28%)B Pulp Mill

General (11%)

A Evaps. (0.7%)

B Evaps. (0.6%) B Evaps.

6th and SC

Table 8.Percentage Contributions to Black Liquor Cycle

AREA DESCRIPTION DissolvedCOD(%)

Dissolved COD -Dissolved BOD

(%)

Color

(%)

DissolvedSolids

(%)A Pulp Mill General

(excludes B evaps)13 16 31 15

B Pulp Mill General 3 4 11 2

A Pulp Mill Caustic 23 27 28 27B Pulp Mill Caustic 17 15 8 12Acid Sewer 23 26 20 43Bleach plant 63 68 55 82

A Evaporators 13 7 1 0.5B Evaporators

(includes 6th and SC)8 5 1 0.5

Black Liquor Cycle(1000 lbs/day)

96 61 51 153

Figure 16Ratio of Specific Conductance to Dissolved Solids Ratio

0.00

0.05

0.10

0.15

0.20

0.25

0.30

Raw

Wat

er

PM

#3

& C

oat

ing

Pre

p.

PM

#4

& P

M #

5

PM

#1

& P

M #

2

A P

ulp

Mil

l (G

ener

al)

A P

ulp

Mill

(C

aust

ic)

B P

ulp

Mil

l (G

ener

al)

B P

ulp

Mill

(C

aust

ic)

Aci

d S

ewer

A E

vap

ora

tors

B E

vap

ora

tors

B E

vap

ora

tors

6th

& S

C

Riv

er W

aste

Gro

un

dw

oo

d -

Co

mp

osi

te

Oti

s -

Co

mp

osi

te

Mil

l Sew

er (

Bar

Scr

een

)

Mil

l Eff

luen

t

SC

/DS

Rat

io (m

S*L

/cm

*mg

)100

Figure 17Dissolved Solids Versus Conductivity

y = 957.57xR2 = 0.9374

0

1000

2000

3000

4000

5000

6000

0 1 2 3 4 5 6

Specific Conductance (mS/cm)

Dis

solv

ed S

olid

s (m

g/li

ter)

Table 9(Dissolved COD - Dissolved BOD) and Specific Conductance

for the Black Liquor Cycle Effluent Streams

AREA DESCRIPTION Dissolved COD -Dissolved BOD

(mg/L)

SpecificConductance

(mS/cm)

Specific Conductance(Dis. COD-Dis. BOD)

(µµS*L/cm*mg)

A Pulp Mill (General) 482 0.911 0.19

B Pulp Mill (General) 783 0.914 0.12

A Pulp Mill (Caustic) 2169 5.010 0.23

B Pulp Mill (Caustic) 1188 2.367 0.20

Acid Sewer 508 3.170 0.62

A Evaporators 432 0.175 0.04

B Evaporators 114 0.032 0.03

B Evap, 6th + SC 693 0.252 0.04

Table 10.Summary of Toxicity Data

SAMPLEDATE

LOCATION A-NOEC LC-50

9/4/2001 Bar Screen 35% 47.5%

9/7/2001 No. 3 PM 100% >1009/4/2001 A Caustic Sewer <5% 4.7%

9/10/2001 Acid Sewer 25% 40%