ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS...

19
D-87 PZ-110-SS PZ-111-KS PZ-111-SD PZ-112-AS PZ-104-KS PZ-104-SD PZ-104-SS PZ-109-SS D-14 D-83 I-62 PZ-101-SS PZ-200-SS PZ-207-AS PZ-102R-SS PZ-102-SS B B' A' A AREA 2 AREA 1 PROPERTY BOUNDARY MW-102 S-61 D-6 I-11 S-10 D-12 LCS-3C LCS-1D LCS-6B PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NORTHWEST A SOUTHEAST A' 450 400 350 300 450 400 350 300 ELEVATION ABOVE MEAN SEA LEVEL (feet) BEND IN SECTION Closed Demolition Landfill Site Access Road North Quarry Portion of the Bridgeton Landfill Area 2 Area 1 PL PL Property Boundary ONSITE WORKERS Direct Contact Ingestion Inhalalation Radiation OFFSITE WORKERS Inhalation WINDBLOWN DUST AND RADON RADON EMISSIONS DISSOLVED PHASE TRANSPORT IN GROUNDWATER LEACHING TO GROUNDWATER DISSOLVED PHASE TRANSPORT IN GROUNDWATER SURFACE WATER RUNOFF TRANSPORT WINDBLOWN DUST AND RADON ONSITE WORKERS Direct Contact Ingestion Inhalalation Radiation SURFACE WATER RUNOFF TRANSPORT RADON EMISSIONS RIM Clay Alluvium St. Louis Fm Loess Loess ? St. Louis Fm Solid Waste Solid Waste Fill RIM RIM RIM Solid Waste Solid Waste RIM RIM Alluvium LEACHING TO GROUNDWATER EMSI Engineering Management Support, Inc. GEOLOGIC LEGEND Solid Waste Clay Loess Alluvium St Louis Fm Limestone Salem Fm Limestone Keokuk Fm Limestone Warsaw Fm LEGEND Geostatisical Estimate of Radiologically Impacted Material (RIM) September 2013 Alluvial Groundwater Elevation Taken at Well September 2013 St Louis Fm Groundwater Elevation Taken at Well September 2013 Alluvial Groundwater Elevation at Cross Section Intersection September 2013 St Louis Fm Groundwater Elevation at Cross Section Intersection 150 0 75 HORIZONTAL SCALE IN FEET VERTICAL EXAGGERATION 5X M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-1-Section Pathways.dwg 6/9/17 Cross Section Index September 2013 Leachate Groundwater Elevation Taken at Well Potential Contaminant Migration and Exposure Pathways Figure 7-1 West Lake Landfill OU-1 RI Addendum Possible Exposure Pathway Possible Migration Pathway Notes: These cross-sections were developed to display groundwater conditions beneath the site , and only reflect the RIM occurrences along these sections. Please see the cross-sections in Appendix M for more detailed portrayals of the RIM occurrences in Areas 1 and 2. Ground surface from Aerial Topography provided by Cooper Aerial Surveys Co. and is dated December 2, 2016

Transcript of ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS...

Page 1: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

D-87

PZ-110-SS

PZ-111-KS

PZ-111-SD

PZ-112-AS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-109-SS

D-14

D-83

I-62

PZ-101-SS

PZ-200-SS

PZ-207-AS

PZ-102R-SS

PZ-102-SS

B

B'

A'

A

AREA 2

AREA 1

PROPERTY

BOUNDARY

MW-102

S-61

D-6

I-11

S-10

D-12

LCS-3C

LCS-1D

LCS-6B

P

L

P

L

P

L

PL

PL

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

PL

PL

PL

PL

PL

P

L

P

L

P

LP

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

P

L

?

?

?

?

?

?

?

??

?

?

?

?

?

?

?

?

?

NORTHWEST

A

SOUTHEAST

A'

450

400

350

300

450

400

350

300

EL

EV

AT

IO

N A

BO

VE

ME

AN

S

EA

L

EV

EL

(fe

et)

BEND IN

SECTION

Closed

Demolition

Landfill

Site A

ccess R

oad

North Quarry

Portion of the

Bridgeton Landfill

Area 2 Area 1

PL

PL

Property B

oundary

ONSITE WORKERS

Direct Contact

Ingestion

Inhalalation

Radiation

OFFSITE WORKERS

Inhalation

WINDBLOWN

DUST AND

RADON

RADON

EMISSIONS

DISSOLVED

PHASE

TRANSPORT IN

GROUNDWATER

LEACHING TO

GROUNDWATER

DISSOLVED

PHASE

TRANSPORT IN

GROUNDWATER

SURFACE WATER

RUNOFF TRANSPORT

WINDBLOWN

DUST AND

RADON

ONSITE WORKERS

Direct Contact

Ingestion

Inhalalation

Radiation

SURFACE WATER

RUNOFF TRANSPORT

RADON EMISSIONS

RIM

Clay

Alluvium

St. Louis Fm

Loess

Loess ?

St. Louis Fm

Solid Waste

Solid Waste

Fill

RIM

RIM

RIM

Solid Waste

Solid Waste

RIM

RIM

Alluvium

LEACHING

TO GROUNDWATER

EMSI Engineering Management Support, Inc.

GEOLOGIC LEGEND

Solid

Waste

Clay

Loess

Alluvium

St Louis Fm

Limestone

Salem Fm

Limestone

Keokuk Fm

Limestone

Warsaw Fm

LEGEND

Geostatisical Estimate

of Radiologically

Impacted Material (RIM)

September 2013 Alluvial Groundwater

Elevation Taken at Well

September 2013 St Louis Fm

Groundwater Elevation Taken at Well

September 2013 Alluvial Groundwater

Elevation at Cross Section Intersection

September 2013 St Louis Fm Groundwater

Elevation at Cross Section Intersection

1500 75

HORIZONTAL SCALE IN FEET

VERTICAL EXAGGERATION 5X

M:\clients\E

MS

I\w

estlake\2017\R

I-A

ddendum

-edits\S

ection-7\F

IG

-7-1-S

ection P

athw

ays.dw

g 6/9/17

Cross Section Index

September 2013 Leachate Groundwater

Elevation Taken at Well

Potential Contaminant

Migration and Exposure Pathways

Figure 7-1

West Lake Landfill OU-1 RI Addendum

Possible Exposure Pathway

Possible Migration Pathway

Notes: These cross-sections were developed to display groundwater conditions beneath the site, and only reflect the RIM occurrences along these sections.

Please see the cross-sections in Appendix M for more detailed portrayals of the RIM occurrences in Areas 1 and 2.

Ground surface from Aerial Topography provided by Cooper Aerial Surveys Co. and is dated December 2, 2016

Page 2: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

B

U

F

F

E

R

Z

O

N

E

ASPHALT

PLANT

STORMWATER

RETENTION

BASIN

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

D-6

D-81

D-83

D-85

I-62

I-66

I-67

I-68

I-73

LR-100

LR-103

LR-104

LR-105

MW-102

MW-104

PZ-205-AS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS PZ-305-AI

S-53

S-84

S-8

S-61

I-65

D-13

PZ-114-AS

I-11

S-10

D-12

D-93

I-9

S-82

D-87

PZ-112-AS

S-5

PZ-207-AS

PZ-113-AD

PZ-113-AS

MW-103

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SD

PZ-101-SS

PZ-102-SS

PZ-103-SS

PZ-105-SS

PZ-107-SS

PZ-110-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-SS

PZ-206-SS

PZ-115-SS

PZ-113-SS

PZ-208-SS

PZ-102R-SS

PZ-210-SS

PZ-210-SD

MW-1204

PZ-116-SS

PZ-106-SD

PZ-106-SS

PZ-104-SS

PZ-104-SD

PZ-100-SD

I-4

D-3

PZ-111-SD

D-14

PZ-109-SS

PZ-211-SS

PZ-100-SS

PZ-104-KS

PZ-106-KS

PZ-100-KS

PZ-111-KS

LOT 2A2

EMSI Engineering Management Support, Inc.

NORTH

5000 250

SCALE IN FEET

Area 1 Alluvial Wells

OU-1 Area Boundary

Area 2 Alluvial Wells

LEGEND

Alluvial Wells

Area 1 Bedrock Wells

MW-103

PZ-115-SS

D-93

1-67

Bedrock WellsPZ-106-SS

Well Groups Used for Evaluation

of Radium Results

West Lake Landfill OU-1 RI Addendum

Figure 7-2

Building/Structure

Paved Road

Unpaved Road

Fence

X X X

Landfill Operation Area

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-2-Well-Groups.dwg 6/1/17

Page 3: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

B

U

F

F

E

R

Z

O

N

E

MW-1204

PZ-100-KS

PZ-100-SD

PZ-100-SS

PZ-101-SS

PZ-102R-SS

PZ-102-SS

PZ-103-SS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-105-SS

PZ-106-KS

PZ-106-SD

PZ-106-SS

PZ-107-SS

PZ-109-SS

PZ-115-SS

PZ-116-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-SS

PZ-206-SS

PZ-208-SS

E

D

G

E

O

F

A

L

L

U

V

I

U

M

STORMWATER

RETENTION

BASIN

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SD

PZ-210-SS

PZ-210-SD

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

REPUBLIC

SERVICES

AREA

OFFICE

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

ASPHALT

PLANT

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

REFUSE

COLLECTION

VEHICLE PARKING

AND REPAIR

D-12

D-13

D-14

D-3

D-6

D-81

D-83

D-85

D-87

D-93

I-11

I-4

I-62

I-65

I-66

I-67

I-68

I-73

I-9

LR-100

LR-103

LR-104

LR-105

MW-102

MW-103

MW-104

PZ-112-AS

PZ-113-AD

PZ-113-AS

PZ-114-AS

PZ-205-AS

PZ-207-AS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS

PZ-305-AI

S-10

S-5

S-53

S-84

S-8

S-82

S-61

PZ-113-SS

PZ-111-SD

PZ-110-SS

PZ-111-KS

PZ-211-SS

LOT 2A2

NORTH

5000 250

SCALE IN FEET

NOTES:

1. Horizontal Coordinates Based on State Plane Missouri East Zone NAD 27

2. Elevations Based on U.S.G.S. Datum.

3. Existing Grade Contours are from the Aerial Survey Completed by

the Sanborn Mapping Company on July 20, 2011.

4. Base Map Prepared by Aquaterra Environmental Solutions, Inc.

Paved Road

Unpaved Road

OU-1 Area Boundary

Alluvial Intermediate Well

St. Louis Formation Well

Salem Formation Well

Keokuk Formation Well

I or AI:

SS:

SD:

KS:

Alluvial Shallow WellS or AS:

Undifferentiated LR or MW:

WELL FORMATION DESIGNATIONS

Alluvial Deep WellD or AD:

LEGEND

Combined Total Radium-226 + 228

in Groundwater,

August 2012 Through February 2014

RADIUM EXPLANATION

Total Radium greater than the Maximum

Contaminant Level of 5 pCi/L for combined

Radium-226 and Radium-228

(all sampling dates)

Total Radium greater than the Maximum

Contaminant Level of 5 pCi/L for combined

Radium-226 and Radium-228

(at least one sampling date but not all sampling dates)

EMSI Engineering Management Support, Inc.

Total Radium less than the Maximum

Contaminant Level of 5 pCi/L for combined

Radium-226 and Radium-228

(all sampling dates)

West Lake Landfill OU-1 RI Addendum

Figure 7-3

Building

Index Contour

Fence

X X X

Landfill Boundary

OU-2 Area Boundary

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-3-Com-Tot-RAD-226-228-PYG.dwg 6/1/17

Page 4: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

B

U

F

F

E

R

Z

O

N

E

D-12

D-13

D-14

D-3

D-6

D-81

D-83

D-85

D-87

D-93

I-11

I-4

I-62

I-65

I-66

I-67

I-68

I-73

I-9

LR-100

LR-103

LR-104

LR-105

MW-102

MW-103

MW-104

MW-1204

PZ-100-KS

PZ-100-SD

PZ-100-SS

PZ-101-SS

PZ-102R-SS

PZ-102-SS

PZ-103-SS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-105-SS

PZ-106-KS

PZ-106-SD

PZ-106-SS

PZ-107-SS

PZ-109-SS

PZ-110-SS

PZ-111-KS

PZ-111-SD

PZ-112-AS

PZ-113-AD

PZ-113-AS

PZ-113-SS

PZ-114-AS

PZ-115-SS

PZ-116-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-AS

PZ-205-SS

PZ-206-SS

PZ-207-AS

PZ-208-SS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS

PZ-305-AI

S-10

S-5

S-53

S-84

S-8

S-82

S-61

E

D

G

E

O

F

A

L

L

U

V

I

U

M

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SS

PZ-211-SD

PZ-210-SS

PZ-210-SD

B

U

F

F

E

R

Z

O

N

E

STORMWATER

RETENTION

BASIN

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

REPUBLIC

SERVICES

AREA

OFFICE

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

ASPHALT

PLANT

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

REFUSE

COLLECTION

VEHICLE PARKING

AND REPAIR

LOT 2A2

NORTH

5000 250

SCALE IN FEET

NOTES:

1. Horizontal Coordinates Based on State Plane Missouri East Zone NAD 27

2. Elevations Based on U.S.G.S. Datum.

3. Existing Grade Contours are from the Aerial Survey Completed by

the Sanborn Mapping Company on July 20, 2011.

4. Base Map Prepared by Aquaterra Environmental Solutions, Inc.

Alluvial Intermediate Well

St. Louis Formation Well

Salem Formation Well

Keokuk Formation Well

I or AI:

SS:

SD:

KS:

Alluvial Shallow WellS or AS:

Undifferentiated LR or MW:

WELL FORMATION DESIGNATIONS

Alluvial Deep WellD or AD:

RADIUM EXPLANATION

Dissolved Radium greater than the Maximum

Contaminant Level of 5 pCi/L for combined

Radium-226 and Radium-228

(all sampling dates)

Combined Dissolved Radium-226 + 228

in Groundwater,

August 2012 Through February 2014

Dissolved Radium less than the Maximum

Contaminant Level of 5 pCi/L for combined

Radium-226 and Radium-228

(all sampling dates)

Dissolved Radium greater than the Maximum

Contaminant Level of 5 pCi/L for combined

Radium-226 and Radium-228

(at least one sampling date but not all sampling dates)

EMSI Engineering Management Support, Inc.

West Lake Landfill OU-1 RI Addendum

Figure 7-4

Paved Road

Unpaved Road

OU-1 Area Boundary

LEGEND

Building

Index Contour

Fence

X X X

Landfill Boundary

OU-2 Area Boundary

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-4-Com-Dis-RAD-226-228-PYG.dwg 6/1/17

Page 5: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well D-3 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-5

R² = 0.3395

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Activ

ity (p

Ci/L

)Well D-3 Radium-226 Total

R² = 0.2814

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Activ

ity (p

Ci/L

)

Well D-3 Radium-226 Dissolved

R² = 0.4654

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

Activ

ity (p

Ci/L

)

Well D-3 Radium-228 Total

R² = 0.1913

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

Activ

ity (p

Ci/L

)

Well D-3 Radium-228 Dissolved

Page 6: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well I-4 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-6

R² = 0.0459

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)Well I-4 Radium-226 Total

R² = 0.0556

0.0

2.0

4.0

6.0

8.0

10.0

12.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-4 Radium-228 Total

R² = 0.0743

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Activ

ity (p

Ci/L

)

Well I-4 Radium-226 Dissolved

R² = 0.2271

0.0

2.0

4.0

6.0

8.0

10.0

12.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-4 Radium-228 Dissolved

Page 7: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well S-5 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-7

R² = 0.0027

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)Well S-5 Radium-226 Total

R² = 0.2831

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well S-5 Radium-226 Dissolved

0.0

2.0

4.0

6.0

8.0

10.0

12.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well S-5 Radium-228 Total

R² = 0.0798

0.0

2.0

4.0

6.0

8.0

10.0

12.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well S-5 Radium-228 Dissolved

Page 8: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well I-68 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-8

R² = 0.3718

0.00.51.01.52.02.53.03.54.04.55.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)Well I-68 Radium-226 Total

R² = 0.4382

0.00.51.01.52.02.53.03.54.04.55.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-68 Radium-226 Dissolved

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-68 Radium-228 Total

R² = 0.1254

0.0

1.0

2.0

3.0

4.0

5.0

6.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-68 Radium-228 Dissolved

Page 9: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well D-6 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-9

R² = 0.1728

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well D-6 Radium-226 Dissolved

R² = 0.3669

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0Ac

tivity

(pCi

/L)

Well D-6 Radium-226 Total

R² = 0.0002

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well D-6 Radium-228 Total

R² = 0.1143

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity )p

Ci/L

)

Well D-6 Radium-228 Dissolved

Page 10: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well D-93 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-10

R² = 0.383

0.00.51.01.52.02.53.03.54.04.55.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)Well D-93 Radium-226 Total

R² = 0.5769

0.00.51.01.52.02.53.03.54.04.55.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

CI/L

)

Well D-93 Radium-226 Dissolved

R² = 0.0468

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well D-93 Radium - 228 Total

R² = 0.3072

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well D-93 Radium-228 Dissolved

Page 11: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well I-9 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-11

R² = 0.3535

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5Ja

n-96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)Well I-9 Radium-226 Total

R² = 0.0527

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-9 Radium-226 Dissolved

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-9 Radium-228 Total

R² = 0.0458

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well I-9 Radium-228 Dissolved

Page 12: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

LegendResult plus 2 Sigma Note: Early non-detect results with elevated MDAs not shown.Radium Result Linear regression trend lineResult minus 2 Sigma R2 - linear regression line correlation coefficient

Well S-82 Radium ResultsWest Lake Landfill OU-1 RI Addendum

Engineering Management Support, Inc.EMSI

Figure 7-12

R² = 0.1534

0.00.51.01.52.02.53.03.54.04.5

Activ

ity (p

Ci/L

)Well S-82 Radium-226 Total

R² = 0.1397

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

Activ

ity (p

CI/L

)

Well S-82 Radium-226 Dissolved

R² = 0.1052

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well S-82 Radium-228 Total

R² = 0.1557

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

Jan-

96

Jan-

97

Jan-

98

Jan-

99

Jan-

00

Jan-

01

Jan-

02

Jan-

03

Jan-

04

Jan-

05

Jan-

06

Jan-

07

Jan-

08

Jan-

09

Jan-

10

Jan-

11

Jan-

12

Jan-

13

Jan-

14

Activ

ity (p

Ci/L

)

Well S-82 Radium-228 Dissolved

Page 13: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

B

U

F

F

E

R

Z

O

N

E

MW-1204

PZ-100-KS

PZ-100-SD

PZ-100-SS

PZ-101-SS

PZ-102R-SS

PZ-102-SS

PZ-103-SS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-105-SS

PZ-106-KS

PZ-106-SD

PZ-106-SS

PZ-107-SS

PZ-109-SS

PZ-115-SS

PZ-116-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-SS

PZ-206-SS

PZ-208-SS

E

D

G

E

O

F

A

L

L

U

V

I

U

M

STORMWATER

RETENTION

BASIN

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SD

PZ-210-SS

PZ-210-SD

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

REPUBLIC

SERVICES

AREA

OFFICE

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

ASPHALT

PLANT

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

REFUSE

COLLECTION

VEHICLE PARKING

AND REPAIR

D-12

D-13

D-14

D-3

D-6

D-81

D-83

D-85

D-87

D-93

I-11

I-4

I-62

I-65

I-66

I-67

I-68

I-73

I-9

LR-100

LR-103

LR-104

LR-105

MW-102

MW-103

MW-104

PZ-112-AS

PZ-113-AD

PZ-113-AS

PZ-114-AS

PZ-205-AS

PZ-207-AS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS

PZ-305-AI

S-10

S-5

S-53

S-84

S-8

S-82

S-61

PZ-113-SS

PZ-111-SD

PZ-110-SS

PZ-111-KS

PZ-211-SS

LOT 2A2

NORTH

5000 250

SCALE IN FEET

NOTES:

1. Horizontal Coordinates Based on State Plane Missouri East Zone NAD 27

2. Elevations Based on U.S.G.S. Datum.

3. Existing Grade Contours are from the Aerial Survey Completed by

the Sanborn Mapping Company on July 20, 2011.

4. Base Map Prepared by Aquaterra Environmental Solutions, Inc.

Paved Road

Unpaved Road

OU-1 Area Boundary

Alluvial Intermediate Well

St. Louis Formation Well

Salem Formation Well

Keokuk Formation Well

I or AI:

SS:

SD:

KS:

Alluvial Shallow WellS or AS:

Undifferentiated LR or MW:

WELL FORMATION DESIGNATIONS

Alluvial Deep WellD or AD:

LEGEND

Combined Total Thorium-230 + 232

in Groundwater,

August 2012 Through February 2014

URANIUM EXPLANATION

Total Thorium-230 + 232 less than15 pCi/L

[the Gross Alpha MCL]

(all sampling dates)

Total Thorium-230 + 232 less than15 pCi/L

[the Gross Alpha MCL]

(at least one sampling date but not all sampling dates)

EMSI Engineering Management Support, Inc.

Total Thorium-230 + 232 less than15 pCi/L

[Less than the Gross Alpha MCL]

(all sampling dates)

West Lake Landfill OU-1 RI Addendum

Figure 7-13

Building

Index Contour

Fence

X X X

Landfill Boundary

OU-2 Area Boundary

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-13-Com-Tot-Thorium-PYG.dwg 6/9/17

Page 14: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

B

U

F

F

E

R

Z

O

N

E

MW-1204

PZ-100-KS

PZ-100-SD

PZ-100-SS

PZ-101-SS

PZ-102R-SS

PZ-102-SS

PZ-103-SS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-105-SS

PZ-106-KS

PZ-106-SD

PZ-106-SS

PZ-107-SS

PZ-109-SS

PZ-115-SS

PZ-116-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-SS

PZ-206-SS

PZ-208-SS

E

D

G

E

O

F

A

L

L

U

V

I

U

M

STORMWATER

RETENTION

BASIN

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SD

PZ-210-SS

PZ-210-SD

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

REPUBLIC

SERVICES

AREA

OFFICE

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

ASPHALT

PLANT

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

REFUSE

COLLECTION

VEHICLE PARKING

AND REPAIR

D-12

D-13

D-14

D-3

D-6

D-81

D-83

D-85

D-87

D-93

I-11

I-4

I-62

I-65

I-66

I-67

I-68

I-73

I-9

LR-100

LR-103

LR-104

LR-105

MW-102

MW-103

MW-104

PZ-112-AS

PZ-113-AD

PZ-113-AS

PZ-114-AS

PZ-205-AS

PZ-207-AS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS

PZ-305-AI

S-10

S-5

S-53

S-84

S-8

S-82

S-61

PZ-113-SS

PZ-111-SD

PZ-110-SS

PZ-111-KS

PZ-211-SS

LOT 2A2

NORTH

5000 250

SCALE IN FEET

NOTES:

1. Horizontal Coordinates Based on State Plane Missouri East Zone NAD 27

2. Elevations Based on U.S.G.S. Datum.

3. Existing Grade Contours are from the Aerial Survey Completed by

the Sanborn Mapping Company on July 20, 2011.

4. Base Map Prepared by Aquaterra Environmental Solutions, Inc.

Paved Road

Unpaved Road

OU-1 Area Boundary

Alluvial Intermediate Well

St. Louis Formation Well

Salem Formation Well

Keokuk Formation Well

I or AI:

SS:

SD:

KS:

Alluvial Shallow WellS or AS:

Undifferentiated LR or MW:

WELL FORMATION DESIGNATIONS

Alluvial Deep WellD or AD:

LEGEND

Combined Dissolved Thorium-230 + 232

in Groundwater,

August 2012 Through February 2014

URANIUM EXPLANATION

Dissolved Thorium-230 + 232 less than15 pCi/L

[the Gross Alpha MCL]

(all sampling dates)

Dissolved Thorium-230 + 232 less than15 pCi/L

[the Gross Alpha MCL]

(at least one sampling date but not all sampling dates)

EMSI Engineering Management Support, Inc.

Dissolved Thorium-230 + 232 less than15 pCi/L

[Less than the Gross Alpha MCL]

(all sampling dates)

West Lake Landfill OU-1 RI Addendum

Figure 7-14

Building

Index Contour

Fence

X X X

Landfill Boundary

OU-2 Area Boundary

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-14-Com-Dis-Thorium-PYG.dwg 6/9/17

Page 15: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

B

U

F

F

E

R

Z

O

N

E

MW-1204

PZ-100-KS

PZ-100-SD

PZ-100-SS

PZ-101-SS

PZ-102R-SS

PZ-102-SS

PZ-103-SS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-105-SS

PZ-106-KS

PZ-106-SD

PZ-106-SS

PZ-107-SS

PZ-109-SS

PZ-115-SS

PZ-116-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-SS

PZ-206-SS

PZ-208-SS

E

D

G

E

O

F

A

L

L

U

V

I

U

M

STORMWATER

RETENTION

BASIN

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SD

PZ-210-SS

PZ-210-SD

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

REPUBLIC

SERVICES

AREA

OFFICE

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

ASPHALT

PLANT

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

REFUSE

COLLECTION

VEHICLE PARKING

AND REPAIR

D-12

D-13

D-14

D-3

D-6

D-81

D-83

D-85

D-87

D-93

I-11

I-4

I-62

I-65

I-66

I-67

I-68

I-73

I-9

LR-100

LR-103

LR-104

LR-105

MW-102

MW-103

MW-104

PZ-112-AS

PZ-113-AD

PZ-113-AS

PZ-114-AS

PZ-205-AS

PZ-207-AS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS

PZ-305-AI

S-10

S-5

S-53

S-84

S-8

S-82

S-61

PZ-113-SS

PZ-111-SD

PZ-110-SS

PZ-111-KS

PZ-211-SS

LOT 2A2

NORTH

5000 250

SCALE IN FEET

NOTES:

1. Horizontal Coordinates Based on State Plane Missouri East Zone NAD 27

2. Elevations Based on U.S.G.S. Datum.

3. Existing Grade Contours are from the Aerial Survey Completed by

the Sanborn Mapping Company on July 20, 2011.

4. Base Map Prepared by Aquaterra Environmental Solutions, Inc.

Paved Road

Unpaved Road

OU-1 Area Boundary

Alluvial Intermediate Well

St. Louis Formation Well

Salem Formation Well

Keokuk Formation Well

I or AI:

SS:

SD:

KS:

Alluvial Shallow WellS or AS:

Undifferentiated LR or MW:

WELL FORMATION DESIGNATIONS

Alluvial Deep WellD or AD:

LEGEND

Total Uranium

in Groundwater,

August 2012 Through February 2014

URANIUM EXPLANATION

Total Uranium greater than the Maximum

Contaminant Level of 30 µg/L

[converted to mass from Uranium-234, Uranium-235 and

Uranium-238 activities]

(all sampling dates)

Total Uranium greater than the Maximum

Contaminant Level of 30 µg/L

[converted to mass from Uranium-234, Uranium-235 and

Uranium-238 activities]

(at least one sampling date but not all sampling dates)

EMSI Engineering Management Support, Inc.

Total Uranium greater than the Maximum

Contaminant Level of 30 µg/L

[Less than converted to mass from Uranium-234, Uranium-235

and Uranium-238 activities]

(all sampling dates)

West Lake Landfill OU-1 RI Addendum

Figure 7-15

Building

Index Contour

Fence

X X X

Landfill Boundary

OU-2 Area Boundary

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-15-Com-Tot-Uranium-PYG.dwg 6/9/17

Page 16: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

B

U

F

F

E

R

Z

O

N

E

MW-1204

PZ-100-KS

PZ-100-SD

PZ-100-SS

PZ-101-SS

PZ-102R-SS

PZ-102-SS

PZ-103-SS

PZ-104-KS

PZ-104-SD

PZ-104-SS

PZ-105-SS

PZ-106-KS

PZ-106-SD

PZ-106-SS

PZ-107-SS

PZ-109-SS

PZ-115-SS

PZ-116-SS

PZ-200-SS

PZ-201A-SS

PZ-202-SS

PZ-203-SS

PZ-204A-SS

PZ-204-SS

PZ-205-SS

PZ-206-SS

PZ-208-SS

E

D

G

E

O

F

A

L

L

U

V

I

U

M

STORMWATER

RETENTION

BASIN

PZ-212-SD

PZ-212-SS

PZ-209-SD

PZ-209-SS

PZ-211-SD

PZ-210-SS

PZ-210-SD

OU-2

CLOSED

DEMOLITION

LANDFILL

OU-2

INACTIVE

SANITARY

LANDFILL

NORTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

REPUBLIC

SERVICES

AREA

OFFICE

SOUTH

QUARRY

PORTION

OF

BRIDGETON

LANDFILL

ASPHALT

PLANT

OU-2

ON-SITE

SOIL

BORROW

STOCKPILE

AREA

SITE

ACCESS

ROAD

AREA 2

AREA 1

REFUSE

COLLECTION

VEHICLE PARKING

AND REPAIR

D-12

D-13

D-14

D-3

D-6

D-81

D-83

D-85

D-87

D-93

I-11

I-4

I-62

I-65

I-66

I-67

I-68

I-73

I-9

LR-100

LR-103

LR-104

LR-105

MW-102

MW-103

MW-104

PZ-112-AS

PZ-113-AD

PZ-113-AS

PZ-114-AS

PZ-205-AS

PZ-207-AS

PZ-302-AI

PZ-302-AS

PZ-303-AS

PZ-304-AI

PZ-304-AS

PZ-305-AI

S-10

S-5

S-53

S-84

S-8

S-82

S-61

PZ-113-SS

PZ-111-SD

PZ-110-SS

PZ-111-KS

PZ-211-SS

LOT 2A2

NORTH

5000 250

SCALE IN FEET

NOTES:

1. Horizontal Coordinates Based on State Plane Missouri East Zone NAD 27

2. Elevations Based on U.S.G.S. Datum.

3. Existing Grade Contours are from the Aerial Survey Completed by

the Sanborn Mapping Company on July 20, 2011.

4. Base Map Prepared by Aquaterra Environmental Solutions, Inc.

Paved Road

Unpaved Road

OU-1 Area Boundary

Alluvial Intermediate Well

St. Louis Formation Well

Salem Formation Well

Keokuk Formation Well

I or AI:

SS:

SD:

KS:

Alluvial Shallow WellS or AS:

Undifferentiated LR or MW:

WELL FORMATION DESIGNATIONS

Alluvial Deep WellD or AD:

LEGEND

Combined Dissolved Uranium 234 + 235 + 238

in Groundwater,

August 2012 Through February 2014

URANIUM EXPLANATION

Dissolved Uranium greater than the Maximum

Contaminant Level of 30 µg/L

[converted to mass from Uranium-234, Uranium-235 and

Uranium-238 activities]

(all sampling dates)

Dissolved Uranium greater than the Maximum

Contaminant Level of 30 µg/L

[converted to mass from Uranium-234, Uranium-235 and

Uranium-238 activities]

(at least one sampling date but not all sampling dates)

EMSI Engineering Management Support, Inc.

Dissolved Uranium greater than the Maximum

Contaminant Level of 30 µg/L

[Less than converted to mass from Uranium-234, Uranium-235

and Uranium-238 activities]

(all sampling dates)

West Lake Landfill OU-1 RI Addendum

Figure 7-16

Building

Index Contour

Fence

X X X

Landfill Boundary

OU-2 Area Boundary

M:\clients\EMSI\westlake\2017\RI-Addendum-edits\Section-7\FIG-7-16-Com-Dis-Uranium-PYG.dwg 6/9/17

Page 17: ONSITE WORKERS OFFSITE WORKERS Property Boundary · 2020. 11. 27. · PZ-302-AI PZ-302-AS PZ-303-AS PZ-304-AI PZ-304-AS PZ-305-AI S-10 S-5 S-53 S-84 S-8 S-82 S-61 PZ-113-SS PZ-111-SD

238

(4.51x10 y)

9

U

Th

(24.1d)

234

Pa

(1.17m)

234

m

U

234

5

(2.47x10 y)

Th

230

(8.0x10 y)

4

(1602y)

226

Ra

(3.823d)

Rn

222

218

Po

(3.05m)

(26.8m)

Pb

214

Bi

214

(19.7m)

(21y)

Pb

210

(164µs)

Po

214

(5.01d)

Bi

210

(stable)

206

(138.4d)

210

Po

Pb

238

(4.51x10 y)

9

U

Legend

Radionuclide

Half-Life

=

Note:

Analytical Results

Obtained for

Highlighted Radionuclides

Note:

Radionuclides produced in less than one percent

of the transformations of the parent are not shown.

Engineering Management Support, Inc.EMSI

Figure 7-17

Uranium-238

Radioactive Decay Series

West Lake Landfill OU-1 RI Addendum

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-7-17-U

238-D

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235

(7.1x9 y)

9

U

Th

(25.5h)

231

Pa

(3.25x10 y)

231

Th

227

(18.2d)

(11.43d)

223

Ra

(4.0s)

Rn

219

215

Po

(1.78ms)

(36.1m)

Pb

211

Bi

211

(215m)

(stable)

Pb

207

235

(7.1x9 y)

9

U

Legend

Radionuclide

Half-Life

=

Note:

Analytical Results

Obtained for

Highlighted Radionuclides

Note:

Radionuclides produced in less than one percent

of the transformations of the parent are not shown.

4

Ac

227

(21.6y)

(4.74m)

Tl

207

Engineering Management Support, Inc.EMSI

Figure 7-18

Uranium-235

Radioactive Decay Series

West Lake Landfill OU-1 RI Addendum

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IG

-7-18-U

235-D

ecay.dw

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232

(1.4x10 y)

10

Th

Ra

(6.7y)

228

Ac

(6.13h)

228

Th

228

(1.910y)

(3.64d)

224

Ra

(55s)

Rn

220

216

Po

(0.15s)

(10.64h)

Pb

212

Bi

212

(60.6m)

(stable)

208

232

(1.4x10 y)

10

Th

Legend

Radionuclide

Half-Life

=

Note:

Analytical Results

Obtained for

Highlighted Radionuclides

Note:

Radionuclides produced in less than one percent

of the transformations of the parent are not shown.

(3.1m)

Tl

208

Pb

(304ns)

212

Po

Engineering Management Support, Inc.EMSI

M:\clients\E

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I\w

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-edits\S

ection-7\F

IG

-7-19-T

232-D

ecay.dw

g 6/1/17

Figure 7-19

Thorium-232

Radioactive Decay Series

West Lake Landfill OU-1 RI Addendum