10.2.5c_-_2012_-_Combined_Sect_2.pdf

Sept 2011 Figure 2-1

U.S. ARMY CORPS

OF ENGINEERS

FEASIBILITY STUDY

USACE-FUSRAP

DuPont Chamber Works Deepwater, New Jersey

Location of AOCs 1 and 2, the Central Drainage Ditch, and

Historical Lagoon A (Basin Complex) q

Former Building 708

Elevator Shaft

Former Building 845

(including 101 & 102)

Loading Dock (Uranium Oxide Area)

Wooden Trough

Historic

CDD

Present

CDD

Note: Aerial Photo taken in September 2005

0 120 24060 Feet

Former Extent of Basin

AOC Location

AOC 1

AOC 2

Historic CDD

Present CDD

Historic Lagoon Area

Present Culvert

Buildings 845 and 708

Cabrera Services, Inc 1106 N. Charles St Suite 300 Baltimore, MD 21201

Sept 2011 Figure 2-2

OF ENGINEERS

Land Use Areas

FEASIBILITY STUDY

USACE-FUSRAP

DuPont Chambers Works Deepwater, New Jersey q

0 600 1,200300 Feet

Notes:

1. Source: New Jesery Department of Environmental Protection

2. Aerial Photo taken in September 2005

Land Use Barren Land

Forest Urban

Water

Wetland

OU1

AOC 1

AOC 2

OU3

AOC 6

Cabrera Services, Inc 1106 N. Charles St

Sept 2011 Figure 2-3

U.S. ARMY CORPS

OF ENGINEERS

q

Total Uranium Concentrations in Soil and Concrete Samples for AOC 1

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 40 8020 Feet

Notes:

1. The highest uranium concentration above 14 pCi/g (investigative screening value) is shown at each sample location.

2. Aerial Photo taken in September 2005

1BH026

78 (0.75')

1BH027

86 (0.75')

1BH001

50 (0.75')

1BH002

127 (0.75')

1BH003

41 (0.75')

1BH009

579 (0.75')

1-SB-04

46 (1.5')

1-SB-03

15 (0.5') 1TP024

363 (0.475')

1BH016

94 (0.75')

1BH022

28 (0.25')

1BH014

27 (0.75')

1-MW-17B

46 (5.25')1BH018

149 (1')

1BH029

62 (1')

1-CPT-06B

18 (1.5')

1-SB-01

414 (2.5') 1TP023

121 (1.25')

1-SB-05

545 (3.5')

1-MW-08A

270 (4.25')

1TP022

652 (1.25')

1-SB-02

15 (1.5')

1TP001

15 (1.75')

1TP017

24 (1.25')

1TP004

7 (1.75')

1TP007

133 (1.75')

1BH034

677 (0.75')

1BH010

23 (0.375')

1BH025

15 (1')

1TP025

Elevator Shaft 177 (1')

1BH015

7 (0.25')

1BH023

8 (2.1')

1BH017

6 (13.5')

1BH024

5 (0.75')

1BH021

4 (0.75')1BH020

2 (14.25')1-MW-22A

3 (3.25')

1BH019

5 (5.5')

1BH012

5 (0.5')

1BH013

6 (7')

1BH007

4 (14.25')

1BH008

8 (7.25')

1BH004

14 (0.75')

1BH005

10 (4.25')

1-MW-07B

5 (8.5')

1-MW-06A

6 (2.5')

1BH028

4 (0.75')

1BH006

7 (6')

1BH033

3 (2.75')

1TP018

27600 (1.75')

1BH011

6 (0.75')

1-MW-21B

2 (4.25')

Total Uranium Concentrations in pCi/g and (depth in feet) below ground surface

> 158

76 - 158

14 - 75

< 3

3 - 13

Sample Station Location and ID Former Drainage Ditch Location Former Building Current Drainage Ditch Location

1BH021

1BH036

99043 (0.5')

1TP013

11 (1.25')

1TP014

5 (1.75')

1BH035

104 (0.75')1TP015

14 (1.75')

Cabrera Services, Inc 1106 N. Charles St

8 11

4 U

3 U

3 U

1 U

2 U

3 J

0 U

5 U

5 U

1 U

3 U

2 U

9.5

2 U

2 J

4 U

2 J

1 U

2 J

-5 U

3 U

27600

16584

13700

2BH038 2BH027

2BH008

1BH0351BH034

1BH033 1BH0111BH010

1BH005

1BH002

3-SB-30

2-SB-10

2-SB-09

1-SB-02

1-SB-01

2-MW-25C

1-MW-08A

1-MW-07B

1-MW-06A

2BH018

DE

PT

H (F

EE

T)

580 FEET

FORMER BUILDING 708 FORMER BUILDING 845

A A'

A

A'

VERTICAL EXAGGERATION = 8X

SC - CLAYEY SAND

CL - SANDY CLAY

CL - SANDY CLAY

GP - GRAVEL

SP - SAND

SW - SAND

MH - SILT

SP - SAND

SW - SAND

SP - SAND

GW - GRAVEL

SM - SILTY SAND

ML - SANDY SILT

CH - CLAY

GROUND SURFACE2BH008 2SB09

2SB10

2BH018

2BH38

2MW25C

2BH027 1MW07B 1BH002

1MW06A

1BH005 1BH010

1SB01 1BH034

1BH033

1MW08A

1BH035

1SB02 1BH011 3SB30

p

SW - SAND

SM - SILTY SAND

Former Loading Dock

2MW03B

2MW02A 2MW05B

3SB01

FORMER CDD

NOW IN DRAINS

1BH036

Sept 2011

U.S. ARMY CORPS

OF ENGINEERS

OU 1 Cross Section (A - A')

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

Figure 2-4

Sample Results

Soil Classification

Cross Section (A - A') Soil Boring Boring (Not used for Lithology)

!( Soil Boring Sample Location #* Test Pit Sample Location

!( Uranium Total > 14.0 pCi/g !( Uranium Total < 14.0 pCi/g

Sample Result (pCi/g) Drainage Ditch Former Building

GW - Gravel (Well Graded) GP - Gravel (Poorly Graded) SW - Sand (Well Graded) SP - Sand (Poorly Graded) SM - Silty Sand SC - Clayey Sand ML - Sandy Silt CL - Sandy Clay MH - Silt CH - Clay (High Plasticity)

Cabrera Services, Inc 1106 N. Charles St

4 U

3 U

3 U

1 U

2 U

3 J

0 U

5 U

5 U

-5 U

3 U

27600

2BH038 2BH027

2BH008

1BH0351BH034

1BH033 1BH0111BH010

1BH005

1BH002

3-SB-30

2-SB-10

2-SB-09

1-SB-02

1-SB-01

2-MW-25C

1-MW-08A

1-MW-07B

1-MW-06A

2BH018

DE

PT

H (F

EE

T)

312 FEET

FORMER BUILDING 845

A'

A

A'

VERTICAL EXAGGERATION = 8X

SC - CLAYEY SAND

CL - SANDY CLAY

SP - SAND

GW - GRAVELSM - SILTY SAND

ML - SANDY SILT

CH - CLAY

GROUND SURFACE 1MW07B

1BH0021MW06A

1BH005 1BH010

1SB01 1BH034

1BH033

1MW08A 1BH035 1SB02

1BH011 3SB30

p

0 200 400100 Feet

Cross Section (A - A') Soil Boring Boring (Not used for Lithology)

!( Soil Boring Sample Location #* Test Pit Sample Location

Sample Results !( Uranium Total > 14.0 pCi/g !( Uranium Total < 14.0 pCi/g

Sample Result (pCi/g) Drainage Ditch Former Building

Soil Classification GW - Gravel (Well Graded) GP - Gravel (Poorly Graded) SW - Sand (Well Graded) SP - Sand (Poorly Graded) SM - Silty Sand SC - Clayey Sand ML - Sandy Silt CL - Sandy Clay MH - Silt CH - Clay (High Plasticity)

Former Loading Dock

3SB01

FORMER CDD

NOW IN DRAINS

1BH036

Sept 2011

U.S. ARMY CORPS

OF ENGINEERS

AOC 1 View of Cross Section A - A'

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

Figure 2-5

Cabrera Services, Inc 1106 N. Charles St

Sept 2011 Figure 2-6

U.S. ARMY CORPS

OF ENGINEERS

q

Total Uranium Concentrations in Soil Samples for AOC 2

FEASIBILITY STUDY

USACE- FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 70 14035 Feet

Notes:

1. The highest uranium concentration above 14 pCi/g (investigative screening value) is shown at each sample location.

2. Aerial Photo taken in September 2005

2BH010

159 (1.25')2-MW-01B

78 (0')

2-SB-06

309 (2.5')

2-MW-20A

220 (1.25')

2BH020

132 (1')

2BH042

385 (0.75')

2-SB-07

800 (1.5')

2BH027

142 (1')

2BH043

238 (.25')

2BH026

23 (4.25')2BH025

34 (2.75')

2-MW-05B

377 (4.5')

2-SB-09

366(.5')

2-SB-10

13700 (2.5')

2-MW-03B

7760 (2.5')

2BH041

2 (5.75')

2BH040

3 (5.75')

2BH039

8 (1.25')

2BH037

9 (5.75')

2BH035

3 (6.25')

2BH034

5 (5.75')

2BH036

10 (5.75')

2-MW-24A

1 (6.75')

2BH032

7 (8.62')

2BH030

7 (5.75')

2BH029

4 (2.75')2BH028

3 (1.25')

2BH021

7 (1.75')

2BH022

4 (5.75')

2BH023

3 (2.5')

2BH024

2 (6.15')

2BH031

4 (9.35')

2-MW-26A

1 (9.25')

2BH017

2 (1.75')

2BH016

5 (12.75')

2BH015

5 (8.4')

2BH014

6 (5.75')2BH013

2 (1.25')

2-MW-16B

3 (6.5')

2BH012

4 (1.25')

2BH005

5 (13.25')

2BH006

3 (13.25')

2BH007

3 (5.75')

2BH008

2 (5.75') 2BH009

9 (2.75')

2-MW-19A

3 (6.25')

2BH011

5 (0.75')2-MW-23B

4 (2.25')

2-MW-04B

5 (8.25')

2-MW-15A

7 (2.5')

2BH002

4 (1.25')

2BH003

4 (5.75')

2BH004

12 (0.75')

2BH001

5 (1.25')

2-SB-08

3 (0.5')

2-MW-02A

2180 (6.5')

2BH018

4832 (3.25')

2BH038

16548 (2.75')

2BH033

3 (10.25')

2-MW-25C

803 (5.5')

2-MW-12A

10 (4.5')

2BH019

2 (6.2')

Total Uranium Concentrations in pCi/g and (depth in feet) below ground surface

> 158

76 - 158

14 - 75

< 3 3 - 13

Sample Station Location and ID Former Drainage Ditch Location Former Buildings 845 and 708

Current Drainage Ditch Location

2BH026

Cabrera Services, Inc 1106 N. Charles St

!( 6

5 U

1 U

3 U

2 U

9.5

2 U

2 J

4 U

2 J

1 U

2 J

-5 U

4010 16584

13700

2BH038 2BH027

2BH008

1BH0351BH034

1BH033 1BH0111BH010

1BH005

1BH002

3-SB-30

2-SB-10

2-SB-09

1-SB-02

1-SB-01

2-MW-25C

1-MW-08A

1-MW-07B

1-MW-06A

2BH018

DE

PT

H (F

EE

T)

295 FEET

FORMER BUILDING 708

A

A'

A

A'

VERTICAL EXAGGERATION = 8X

SC - CLAYEY SAND

CL - SANDY CLAY

CL - SANDY CLAY

GP - GRAVEL

SP - SAND

SW - SAND

MH - SILT

SP - SAND

SP - SAND

SM - SILTY SAND

ML - SANDY SILT

GROUND SURFACE

2BH008 2SB09

2SB10

2BH018

2BH38

2MW25C

2BH027

p 0 200 400100

Feet

SW - SAND

Cross Section (A - A') Soil Boring Boring (Not used for Lithology)

!( Soil Boring Sample Location #* Test Pit Sample Location

Sample Results !( Uranium Total > 14.0 pCi/g !( Uranium Total < 14.0 pCi/g

Sample Result (pCi/g) Drainage Ditch Former Building

Soil Classification GW - Gravel (Well Graded) GP - Gravel (Poorly Graded) SW - Sand (Well Graded) SP - Sand (Poorly Graded) SM - Silty Sand SC - Clayey Sand ML - Sandy Silt CL - Sandy Clay MH - Silt CH - Clay (High Plasticity)

Former Loading Dock 2MW03B

2MW02A 2MW05B

FORMER CDD

NOW IN DRAINS

Sept 2011

U.S. ARMY CORPS

OF ENGINEERS

AOC 2 View of Cross Section A - A'

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

Figure 2-7

Cabrera Services, Inc 1106 N. Charles St

Sept 2011 Figure 2-8

OF ENGINEERS

q

Total Uranium Concentrations in Soil Samples for AOC 6

FEASIBILITY STUDY

USACE- FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 90 18045 Feet

Notes:

1.The highest uranium concentration above 14 pCi/g (investigative screening value) is shown at each sample location.

2. Aerial Photo taken in September 2005

6-CPT-37

153 (8.5')

6-SB-20

101 (6.5')

6-SB-22

72 (10.5')

6-SB-19

71 (6.5')

6-CPT-25

1 (5.5')

6-SB-21

1 (11')

6-SB-18

63 (3')

6-SB-17A

53 (4')

6-SB-17

106 (2.5')

6-SB-12

32 (0.5')

6-SB-02

26 (2.5')

6-SB-08

16 (2')

6-SB-06

35 (2')

6-SB-11

30 (1.5')

6-SB-03

386 (3')

6-SB-35

57 (0.5')

6-SB-34

35 (0.5')

6-SB-04

3910 (1.5')

6-SB-38

3740 (0.5')

6-SB-36

151 (2.5')

6-CPT-62A

1280 (1')

6-CPT-21

69 (2.5')

6-SB-41

4 (5.5') 6-SB-40

5 (0.5')

6-SB-18A

2 (6.5')

6-MW-06B

3 (19.25')

6-MW-07B

1 (16.75')

6-MW-01B

0 (7')

6-SB-13

2 (6.5') 6-SB-31

53 (3')

6-SB-14

10 (6')

6-SB-15

2 (11')

6-SB-32

2 (0.5')

6-SB-05

4 (2.5')

6-SB-33

10 (0.5')

6-SB-16

1 (11')

6-MW-02B

0 (8.5')

6-SB-10

2 (7.5')

6-SB-09

4 (10.5')

6-MW-03B

1 (7.5')

6-SB-07

2 (2')

6-MW-04B

3 (7.25')

6-SB-01

2 (8')

6-MW-05B

1 (8.25')

6-CPT-45

6 (3')

6-CPT-54

2 (11.5')

6-CPT-05

-2 (9')

6-SB-37

124 (1.5')

6-SB-39

11 (0.5')

Total Uranium Concentration in pCi/g and (depth in feet) below ground surface

> 158 76 - 158 14 - 75

< 3 3 - 13

Sample Station Location and ID

6-CPT-37

Cabrera Services, Inc 1106 N. Charles St

6MW07B

6CPT186CPT17

6CPT16

6MW04B

6CPT27

6CPT21

6CPT62

6CPT28

6CPT20

6SB086SB07

6SB09

6SB14 6SB31

6MW05B

6SB036SB13

6SB04

6SB02

6SB12

6SB01

6SB17A

6SB40

6SB37

6SB36 6SB38

6SB346SB41

6SB35

6SB17

2 U

4 U2 U

1 U

3 U

3 U

1 U

1 U

3 U

0 U1 U

2 U

1 U

0 U

1 U

-2 U

1 U

-3 U

151 3910

295 FEET

VERTICAL EXAGGERATION = 3X

CL - SANDY CLAY

SP - SAND

Legend Cross Section (B - B') Soil Boring

Sample Results !( Uranium Total > 14 pCi/g !( Uranium Total < 14 pCi/g

Sample Result !( CPT Location (No Sample)

Soil Classification GW - Gravel (Well Graded) GP - Gravel (Poorly Graded) SW - Sand (Well Graded) SP - Sand (Poorly Graded) SM - Silty Sand SC - Clayey Sand ML - Sandy Silt CL - Sandy Clay MH - Silt CH - Clay (High Plasticity)

ML - SILT

SM - SILTY SAND

SW - SAND

SW - SAND

SM - SILTY SAND

SP - SAND

B

B'

B

B' q

SP - SAND

DE

PT

H (F

EE

T)

Figure 2-9

U.S. ARMY CORPS

OF ENGINEERS

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

Sept 2011

AOC 6 Cross Section (B-B')

Cabrera Services, Inc 1106 N. Charles St

6MW07B

6CPT186CPT17 6MW04B

6CPT27

6CPT21

6CPT62

6CPT28

6CPT20

6SB086SB07

6SB09

6SB14 6SB31

6MW05B 6SB036SB13

6SB04

6SB02

6SB12

6SB01

6SB17A

6SB40

6SB37

6SB36 6SB38

6SB346SB41

6SB35

6SB17

6CPT62A

2 U

4 U2 U

1 U

3 U

3 U

1 U

1 U

3 U

0 U1 U

2 U

1 U

0 U

1 U

-2 U

1 U

-3 U

151 3910

6-SB-21

6-SB-03

6-SB-09

6-SB-17

6-SB-02

6-SB-12

6-SB-04B

6-SB-07

6-SB-01

6-MW-05B

6-MW-08

6-SB-40

6-SB-04

6-SB-34

6-SB-31

6-SB-14

6-CPT-16

6-CPT-17

6-CPT-18

6-SB-17A

6CPT62A

6-SB-03B

6CPT20

6CPT28

6-SB-36

6-SB-35

210 FEET

VERTICAL EXAGGERATION = 3X

SP - SAND

SW - SAND

SW - SAND

SM - SILTY SAND

SP - SAND

B'

B

B' q

SP - SAND

DE

PT

H (F

EE

T)

Sept 2011

U.S. ARMY CORPS

OF ENGINEERS

Detailed View of Cross Section B - B' in Area of East Road

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

Figure 2-10

Sample Results

Soil Classification

Cross Section (B - B') Soil Boring

!( Uranium Total > 14 pCi/g !( Uranium Total < 14 pCi/g

Sample Result (pCi/g) !( CPT Location (No Sample)

GW - Gravel (Well Graded) GP - Gravel (Poorly Graded) SW - Sand (Well Graded) SP - Sand (Poorly Graded) SM - Silty Sand SC - Clayey Sand ML - Sandy Silt CL - Sandy Clay MH - Silt CH - Clay (High Plasticity)

Cabrera Services, Inc 1106 N. Charles St

Sept 2011 Figure 2-11

EDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDED

EDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDEDED

U.S. ARMY CORPS

OF ENGINEERS

q

Average Uranium Concentrations in OU 1, "A" Aquifer

FEASIBILITY STUDY

USACE- FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 75 15037.5 Feet

1-MW-18A

1090.81

1-MW-10A

109.1

1-MW-06A

2.24

2-MW-20A

4.93

2-MW-15A

331.41

2-MW-02A

14026.56

2-MW-26A

1.98

2-MW-24A

0.36

1-MW-08A

26315.53

2-MW-19A

1.93

1-MW-21A

0.84

1-MW-22A

3.4 l

2-MW-12A

163.31

Cabrera Services, Inc 1106 N. Charles St Suite 300 Baltimore, MD 21201

Monitoring Well Location

Former Drainage Ditch Location Former Buildings 845 and 708

Current Drainage Ditch Location

Uranium Total results that exceed 30 micrograms per Liter (ug/L) l Average Groundwater Flow Direction

Temporary Well Locations, July 2007ED

3-SB-32

0.7

3-SB-30

0.4 Notes:

1. Uranium Total results are reported in micrograms per liter (ug/L)

2. Aerial Photo taken in September 2005

3. Additional borings and temporary wells used to delineate groundwater contamination.

4. Drainage ditches control and capture groundwater flow in A Aquifer.

Sept 2011 Figure 2-12

U.S. ARMY CORPS

OF ENGINEERS

q

Average Uranium Concentrations in OU 1, "B" Aquifer

FEASIBILITY STUDY

USACE- FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 75 15037.5 Feet

Notes:

1. Uranium Total results are reported in micrograms per liter (ug/L)

2. Well 2MW-25C is completed in the C Aquifer to evaluate vertical migration

3. Aerial Photo taken in September 2005

3-MW-14B

3.8

1-MW-17B

2.01

3-MW-13B

0.4

1-MW-11B

0.22

1-MW-09B

1.97

1-MW-07B

0.17

2-MW-25C

1.42

2-MW-23B

0.62

2-MW-01B

20.91

2-MW-04B

9.02

2-MW-16B

3.3

2-MW-05B

167.32

2-MW-03B

29559.6 l

Cabrera Services, Inc 1106 N. Charles St Suite 300 Baltimore, MD 21201 l

Monitoring Well Location

Former Drainage Ditch Location Former Buildings 845 and 708

Current Drainage Ditch Location

Uranium Total results that exceed 30 micrograms per liter (ug/L)

Average Groundwater Flow Direction

Sept 2011 Figure 2-13

&< I17-P01A

I17-M01A

H17-M02B

4-MW-07A

4-MW-06A

4-MW-05A

4-MW-02A

4-MW-01B

AOI 1

U.S. ARMY CORPS

OF ENGINEERS

q

Area of Interest (AOI) Well Locations (AOC4)

FEASIBLITY STUDY

USACE- FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 50 10025 Feet

Note: Aerial Photo taken in September 2005

4-GP-25

4-GP-24

4-GP-23

4-GP-15

4-GP-14

4-GP-04

4-GP-07

4-GP-08

4-GP-16

4-GP-01

4-GP-17

4-GP-18

4-GP-10

4-GP-02

4-GP-03

4-GP-12

4-GP-09

4-GP-06

4-GP-13

4-GP-21

Geoprobe groundwater sample location

Slurry Wall

Well Locations

Area of Interest (AOI) 1

A Aquifer B Aquifer

Cabrera Services, Inc 1106 N. Charles St

Sept 2011 Figure 2-14

U.S. ARMY CORPS

OF ENGINEERS

q

Average Uranium Concentrations in "B" Aquifer, AOC 6

FEASIBILITY STUDY

USACE- FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 25 5012.5 Feet

Notes:

1. Uranium Total results are reported in micrograms per liter (ug/L)

2. Aerial Photo taken in September 2005

3. 6MW07B is completed at the base of the B Aquifer for vertical delineation

6-MW-06B

5.28

6-MW-05B

0.59

6-MW-02B

0.41

6-MW-03B

1.816-MW-04B

1.58

6-MW-01B

266.87

6-MW-07B

1.27 l l Monitoring Well Location<

Uranium Total results that exceeds 30 micrograms per liter (ug/L)

Average Groundwater Flow Direction

Cabrera Services, Inc 1106 N. Charles St

Sept 2011 Figure 2-15

U.S. ARMY CORPS

OF ENGINEERS

q

Total Uranium Concentrations for Sediment and Surface

Water Samples in AOC 6 (OU 3)

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

0 25 5012.5 Feet

Notes:

1. Aerial Photo taken in September 2005

2. Bolded text represents exceedances above ISV and MCL

6-SD-08

Uranium Total - 1.65 pCi/g

6-SW-08

Uranium Total - 1.92 ug/L

6-SD-04

Uranium Total - 0.47 pCi/g

6-SW-04

Uranium Total - 0.4 ug/L

6-SD-06

Uranium Total - 0.67 pCi/g

6-SW-06

Uranium Total 0.36 ug/L

6-SD-05

Uranium Total - 0.31 pCi/g

6-SW-05

Uranium Total - 0.3 ug/L

6-SD-02

Uranium Total - 13 pCi/g

6-SW-02

Uranium Total - 265 ug/L

6-SD-12

Uranium Total - 3.97 pCi/g

6-SW-12

Uranium Total - 1.18 ug/L

6-SD-07

Uranium Total - 1.03 pCi/g

6-SW-07

Uranium Total - 1.14 ug/L

6-SD-09

Uranium Total - 0.81 pCi/g

6-SW-09

Uranium Total - 3.03 ug/L

6-SD-01

Uranium Total - 0 pCi/g

6-SW-01

Uranium Total - 0.37 ug/L

6-SD-13

Uranium Total - 0.3 pCi/g

6-SW-13

Uranium Total - 1.32 ug/L

6-SD-10

Uranium Total - 2.94 pCi/g

6-SW-10

Uranium Total - 1.75 ug/L

6-SD-11

Uranium Total - 18.4 pCi/g

6-SW-11

Uranium Total - 1.35 ug/L

6-SD-03

Uranium Total - 0.3 pCi/g

Sediment (SD) and Surface Water (SW) Sample Locations!>

Cabrera Services, Inc 1106 N. Charles St

Figure 2-16

OF ENGINEERS

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

Sept 2011

General Conceptual Site Model

Potential Sources

Contaminated Soil

Infiltration / Percolation Groundwater

Exposure Routes Potential Receptors1

Ingestion

Dermal

Surface Runoff

Surface Water Ingestion Dermal

Ingestion Dermal

Direct Contact

External Gamma

Primary Release Mechanism

Environmental Transport Medium

Sediment Ingestion

Inhalation

Dermal

Particulate / Gaseous Emission Air Inhalation

Complete Exposure Pathway

Incomplete Exposure Pathway

Hypothetical Residential Receptor

1 Potential receptors include industrial, construction, utility and maintenance workers

Cabrera Services, Inc 1106 N. Charles St

OF ENGINEERS

FEASIBILITY STUDY

USACE - FUSRAP

DuPont Chambers Works Deepwater, New Jersey

EU3A (AOC4)

(Historical Lagoon A)

Sept 2011 q

EU3B (AOC6)

(East Area)

Site Layout including Exposure Units (EU)

EU1 (AOC2)

(F Corral, Former Building 708)

EU1 (AOC1)

(Former Building 845)

EU2A (AOC3)

(Central Drainage Ditch) vOU3

EU2B (AOC5)

(Building J-26 Area)

Background Reference Area

0 750 1,500375 Feet

Note: Aerial Photo taken in September of 2005

Figure 2-17

Cabrera Services, Inc 1106 N. Charles St Suite 300 Baltimore, MD 21201

Background Reference Area

OU1

OU2

OU3

EU1 (AOC 1)

EU1 (AOC 2)

EU2A (AOC 3)

EU2B (AOC 5)

EU3A (AOC 4)

EU3B (AOC 6)