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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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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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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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
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232-D
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Figure 7-19
Thorium-232
Radioactive Decay Series
West Lake Landfill OU-1 RI Addendum