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us EPA RECORDS CENTER REGION 5
^ ARCADIS
Settlement Confidential - FOIA Exempt
407110
Proposed Scope for Focused Cleanup of Plainwell No. 2 Dam Area April 13,2009
Background Settlement Confidential - FOIA Exempt
KRSG, USEPA, MDEQ, and Natural Resource Trustee met 10/07/08 to review KRSG's proposed Next Steps for Cleanup and Restoration of the Kalamazoo River - Included scope for cleanup of Plainwell No. 2 Dam Area
Conceptual Design Report for Bank Removal and Restoration -Plainwell No. 2 Dam Area (CDR) submitted to USEPA 11/04/08
A meeting was held 12/04/08 to discuss Agencies' review of the CDR
Additional data from MDEQ forwarded to KRSG on 12/29/08
A planned January 2009 meeting to complete scope discussions was canceled by Millennium Holdings, LLC
ARCADIS reconnoitered Island 2 side channel area in February 2009
This updated proposed scope for jointly funded cleanup agreement with USEPA was modified in response to Agency comments on the initial proposal, and additional information from MDEQ
^ A R C A D I S
Summary of Scope Adjustments from Conceptual Design Report
Settlement Confidential - FOIA Exempt
Information from MDEQ was incorporated to generate updated cumulative mass removal basis for targeting bank segments
- New bank segments included near the Dam, Island 2 side channel - PCB mass removal increased to 92% of available inventory - Bank removal increased to 53% of total length
0.9-acre floodplain area near mouth of oxbow with 44 (J) mg/kg PCB in the surface soil (0 to 0.5-foot interval) included
Remaining floodplain and bank soil PCB concentrations average 2.3 mg/kg with a median of 1.3 mg/kg
0.9-acre sediment area on west side of oxbow included down to midpoint between sediment samples P2RT7-7 and P2RT8-7
Removal of toe-of-bank sediments in specific areas
- To be determined in design based on individual transect information - Allowed for using 1.5 ft^ cross-sectional excavation along length of
removed bank
^ ARCADIS
Proposed Removal Areas Settlement Confidential - FOIA Exempt
SOIL SAMPLE LOCATION TOPOGRAPHY/BATHYMETRY CONTOUR - 0.5 FT INTERVAL
MAXIMUM PCB RESULT (ppm): [~ [ SHORELINE (APPROXIMATE)
1 BANKAND SEDIMENT REMOVAL AREA
SEDIMENT REMOVAL AREA
ADDITIONAL BANKAND SEDIMENT REMOVAL AREA BASED ON MDEQ DATA !
^ ^ ADDITIONAL SEDIMENT REMOVAL AREA
FLOODPLAIN REMOVALAREA
l a ARCADIS
Settlement Confidential - FOIA Exempt
Removal Scope: Proposed Bank Soil PCB Mass Removal
100
90
80
c
•o
> o E
(0 (0 10
ffi O a. .1 S. 3 E 3
o
70
60
50
40
30
20
10
" " ^ i i i i l m m ^ ^ ^ ^ ^ ^ ^ W ^
. . - • " - ,
1 1
^ * 1 • Cumulative PCB Mass
^ , ^ - Propose(J Removal
• 1
« 1 • '
• 1
• 1 • 1
• 1
^
1 1 ] 1 — ' 1 1
0.0 0.5 1.0 1.5 2.0 2.5
Cumulative Length Removed (miles)
3.0 3.5
(SI ARCADIS
Settlement Confidential - FOIA Exempt
Removal Scope: Proposed Bank Soil PCB Mass Removal
100
90
- ^ 80
a>
? o E & tn
ffi O Q.
_2 3 E 3
o
70
60
50
40
30
20
10
• mmmmm ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ H
*
. • •
, . - * • • •
«• «• Ti *^ *
o o o o o o o o o o o oo 0 0 o
1 1
• •
•
• •
• •
• • • •
• •
• • • •
• • •
• •
•
• ^ •
•
• • 1 • •
1
•
•
• •
• • •
- " ' u 1 1
1
•
•
•
o • n • o
1 Cumulative PCB Mass (removecj)
- Proposecj Removal Cumulative PCB Mass (not removed) Depth-weighted PCB Concentration Removed Depth-weighted PCB Concentrations Not Removed Maximum PCB Concentration Removed Maximum PCB Concentration Not Removed
1 1 1 1 1
1 1 1 . ^ P2BS-35 1 o
• • • 1 8^ P2BS-26
100
90
80
70
60
50
40
30
20
10
"3) E
I 0)
u c o o ffi o Q.
0.0 0.5
^ ^ o u ^ t s
1.0 1.5 2.0 2.5
Cumulative Length Removed (miles)
3.0 3.5
Scope Summary Settlement Confidential - FOIA Exempt
Parameter
^ ^ _ Bank Length
I ^ H Bank Area
• Bank Soil Volume
Extent of Removal
2.1 miles
7.1 acres S
11,200 cy
Floodplain Area
Floodplain Volume
Sediment Volume
TOTAL VOLUME
0.9 acres
780 cy
2,290 cy
14,270 cy
(SI ARCADIS
TSCA Disposal Requirements Settlement Confidential - FOIA Exempt
App l ica t ion of Fox River Protocol - Depth-weighted average PCB concentration to 30 inches or depth of
removal - Evaluated on basis of removal segments - Combined results from samples collected by ARCADIS and MDEQ
when both present in a removal segment
No mater ia ls require TSCA d isposa l - Five removal segments contained either sediment or soils with
maximum PCB concentration > 50 mg/kg PCB - Depth-weighted average PCB concentrations over removal depths
in these five removal segments range from 34.6 to 42.5 mg/kg
m ARCADIS
Settlement Confidential - FOIA Exempt
Removal Segments with Max PCB > 50 mg/kg LEGEND:
<i»S0IL SAMPLE LOCATION (MAXIMUM PCB RESULT (ppm):
< 1 1 -<5 5-<15 15-<25 25 - < 50 >50
SEDIMENT SAMPLE LOCATION MAXIMUM PCB RESULT (ppm):
TOPOGRAPHY/BATHYMETRY CONTOUR - 0 6 FT INTERVAL I I SHORELINE (APPROXIMATE)
• • BANKAND SEDIMENT REMOVALAREA
J H i SEDIMENT REMOVALAREA
m i POTENTIAL ADDITIONAL BANKAND SEDIMENT REMOVALAREA BASED ON MDEQ DATA
• • FLOODPLAIN REMOVALAREA
POTENTIAL TSCAAREA
dARCADIS
Settlement Confidential - FOIA Exempt
TSCA Disposal Evaluation According to Fox River Protocol • • • • • 1
Locat ion
P2FP-053
P2RT-6-2
P2BN-23
P2BN-24
P2BN-26
^^HR-
^ • » . •
• • • m MDEQ
Sample ID
N/A
N/A
PSD-36 and PSD-37
PSD-36 and PSD-37
PSL-40
"1
^ ^ ^ ^ H
Removal Depth
12 inches
18 inches
12 inches
12 inches
24 inches
^
Sample Interval Top (in)
0 6
12 0 2 6
12 18 24 0 6
12 14
0 6
12 20
0
6
8
12
19
Bot tom (in)
6 12 24 2 6 12 18 24 27 6
12 14 21 6 12 20 24
6
8
12
19
23
PiPliPPi'''''
Th ickness
(in) 6 6
12 2 4 6 6 6 3 6 6 2 7 6 6 8 4
6
2
4
7
4
ARCADIS PCB
(mg/kg) 13J 60 J 0.92 43.4 100 22.6
0.086
0.086 0.054 0.88 0.27 0.27
ND (0.064 U) 1.1
0.46 J 0.13
ND (0.082 U)
7.6 J
8.4 J
8.4 J
45
45
MDEQ PCB
(mg/kg)
80 66 66
80 66
47
47
73
73
^
^^^^^^HBBHB
Average PCB
(mg/kg
41 33 33
0.032 41 33
0.13 0.041
27
28
41
59
45
Non-TSCA | Not included In calculation 1 JKKtKK^
PiiPPi"''' Depth-
Weighted PCB
36.5
34.6
36.9
37.1
42.5
•
TSCA Determinat ion
Non-TSCA
Non-TSCA
Non-TSCA
Non-TSCA
Non-TSCA
• • ^ • • • • 1
l i ^ ^ ^ ^ l
^ 1 J ^ ^ H
i9f ARCADIS 10
^ ARCADIS
Estimated Planning and Removal Action Schedule
Settlement Confidential - FOIA Exempt
Plainwell No. 2 Dam Area
Administrative Process Meeting w ith USEPA and MDEQ to finalize scope Preparation of Work Plan for AOC Working Meeting to finalize Scope Finalization of Work Plan for AOC Obtain Access Agreements Finalization of AOC Document Preparation of USEPA Action Memo Public Meeting to Describe Project Scope and Schedule
Design Process Prepare Draft Design Documents Review of Draft Design by Agencies/Tmstees Prepare Final Design Documents Review of Final Design by USEPA and working meetings if needed USEPA Approval of Remdial Action Design
Implementation Mobilization/Staging/Access/Clearing Year 1 Removal Actions Year 2 Removal Actions
2009-01 2009-02 2009 - 03 2009-04 2010-01 2010-02 2010-03 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
^ 4/13
t
^
l a ARCADIS 12
u^/5-of i^^:\ <a ARCADIS c J CAL ^^^^ ef
Proposed Scope for Focused Cleanup of Plainwell No. 2 Dam Area April 13,2009
Settlement Confidential - FOIA Exempt
Background Settlement Confidential - FOIA Exempt
KRSG, USEPA, MDEQ, and Natural Resource Trustee met 10/07/08 to review KRSG's proposed Next Steps for Cleanup and Restoration of the Kalamazoo River - Included scope for cleanup of Plainwell No. 2 Dam Area
Conceptual Design Report for Bank Removal and Restoration -Plainwell No. 2 Dam Area (CDR) submitted to USEPA 11/04/08
A meeting was held 12/04/08 to discuss Agencies' review of the CDR
Additional data from MDEQ forwarded to KRSG on 12/29/08
A planned January 2009 meeting to complete scope discussions was canceled by Millennium Holdings, LLC
ARCADIS reconnoitered Island 2 side channel area in February 2009
This updated proposed scope for jointly funded cleanup agreement with USEPA was modified in response to Agency comments on the initial proposal, and additional information from MDEQ
(SI ARCADIS
Summary of Scope Adjustments from Conceptual Design Report
Settlement Confidential - FOIA Exempt
Information from MDEQ was incorporated to generate updated cumulative mass removal basis for targeting bank segments
- New bank segments included near the Dam, Island 2 side channel - PCB mass removal increased to 92% of available inventory - Bank removal increased to 53% of total length
0.9-acre floodplain area near mouth of oxbow with 44 (J) mg/kg PCB in the surface soil (0 to 0.5-foot interval) included
Remaining floodplain and bank soil PCB concentrations average 2.3 mg/kg with a median of 1.3 mg/kg
0.9-acre sediment area on west side of oxbow included down to midpoint between sediment samples P2RT7-7 and P2RT8-7
Removal of toe-of-bank sediments in specific areas
- To be determined in design based on individual transect information - Allowed for using 1.5 ft^ cross-sectional excavation along length of
removed bank
(SI ARCADIS
Settlement Confidential - FOIA Exempt
Proposed Removal Areas ^
• • • " . ' ^
p
ILA"^*" LtGENu SEDIMENT SAMPLE LOCATION MAXIMUM PCB RESULT (ppm):
O © ©
O 1 m \ •
SfRUCTtjSEJI^B
^
1
1 P
1 '
< i
1 -<5
5 -<15
15-<25
25-<50
.>50
SOIL SAMPLE LOCATION MAXIMUM PCB RESULT (ppm):
D < 1
B 1 -<5
E 5 - < 1 5
D 15-<25
a 25 - < 50
• >50
1 K~ OBLsTRUCTURE
• > \ ^ f ".s-i '
Hl^,
TOPOGRAPHY/BATHYMETRY CONTOUR - 0.5 FT INTERVAL
SHORELINE (APPROXIMATE)
BANKAND SEDIMENT REMOVALAREA
SEDIMENT REMOVAL AREA
$ § 5 ADDITIONAL BANKAND SEDIMENT REMOVAL AREA BASED ON MDEO DATA j
5 $ $ ADDITIONAL SEDIMENT REMOVALAREA
FLOODPLAIN REMOVALAREA
I
Settlement Confidential - FOIA Exempt
Removal Scope: Proposed Bank Soil PCB Mass Removal
100
90
80
c u 0)
•D 0) > o E 0)
QC (A (A ra
CQ O D . 0)
3
E 3
o
70
60
50
40
30
20
10
^ ^ . ^ 0/ L ^ ^ ^ ^ ^ • • • • • t 4*7 / i**'
1 1
^ * 1 • Cumulative PCB Mass
^ , ^— - Proposed Rennoval
• 1
* 1
• 1 • 1
• 1 • 1
•
«.
^ J
0.0 0.5 1.0 1.5 2.0 2.5
Cumulative Length Removed (miles)
3.0 3.5
(3i ARCADIS
Removal Scope: Proposed Bank Soil PCB Mass Removal
Settlement Confidential - FOIA Exempt
100
90
^ 80 C
s 0)
0) > o E
in tn a
QQ U Q. 0)
_>
Si 3 E 3
o
70
60
50
40
30
20
10
1 o O o o o o o o o o o oo 0 0 0 1 • o o ^ " "
z x-¥»* <M 1
A
^ *
, . • - * • • •
<• • • 1 1 1
• •
•
• •
•
• •
• « •
• • •
•
• •
• •
•
• •
• •
•
• ^ •
•
• • •
- •
• • 1 • •
•
•
• •
• • •
1
• 1
1
•
•
1 • Cumulative PCB Mass (removed)
• ^ - Proposed Removal o Cumulative PCB Mass (not removed) • Depth-weighted PCB Concentration Removed D Depth-weighted PCB Concentrations Not Removed • Maximum PCB Concentration Removed o Maximum PCB Concentration Not Removed
1
1 P2BS-35 1 o
• • • 1 8^ P2BS-26
100
90
80
70
60
50
40
30
20
10
O)
E
CO k. *^ c 0) u c o o ffi o Q.
0.0 0.5
(SI ARCADIS
1.0 1.5 2.0 2.5
Cumulative Length Removed (miles)
3.0 3.5
Scope Summary Settlement Confidential - FOIA Exempt
Parameter
Bank Length
^ H Bank Area
Bank Soil Volume
Extent of Removal
2.1 miles
7.1 acres
11,200 cy
Floodplain Area
Floodplain Volume
Sediment Volume
TOTALVOLUME
0.9 acres
780 cy
2,290 cy
14,270 cy
0 ARCADIS
TSCA Disposal Requirements Settlement Confidential - FOIA Exempt
ppl ica t ion of Fox River Protocol - Depth-weighted average PCB concentra
removal - Evaluated on basis of removal segments - Combined results from samples collected by ARCA
when both present in a removal segment
' T h
J u ^ /z
/ , X
No mater ials require TSCA d isposa l - Five removal segments contained either sediment or soils with I maximum PCB concentration > 50 mg/kg PCB p Depth-weighted average PCB concentrations over removal depths I in these five removal segments range from 34.6 to 42.5 mg/kg
u
^ 7^X>:=*-,?-
fZ-Oc: ^k ctj^ / Ac'£
(Sk ARCADIS
Settlement Confidential - FOIA Exempt
Removal Segments with Max PCB > 50 mg/kg LEGEND: SOIL SAMPLE LOCATION MAXIMUM PCB RESULT (ppm):
< 1 % 1 - < 5
• 5-<15 15-<25
• 25 - < 50 • >50
' ve^^^^ l^^^^^^^H ^ STRUCTUREl^^^^^B^^^^H
SEDIMENT SAMPLE LOCATION MAXIMUM PCB RESULT (ppm):
• < 1 1 -<5
5-< 15 15-<25
25 - < 50
>50
I^BB ^^^^^^^^^^^^^^^^^^1
TOPOGRAPHY/BATHYMETRY CONTOUR - 0 5 FT INTERVAL
1 1 SHORELINE (APPROXIMATE)
• • BANKAND SEDIMENT REMOVALAREA m SEDIMENT REMOVALAREA
H POTENTIAL ADDITIONAL BANKAND SEDIMENT REMOVALAREA BASED ON MDEQ DATA m FLOODPLAIN REMOVALAREA
f ~ ~ l POTENTIAL TSCAAREA
HHUMHI^ IHUH ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^1
^ . i • < ,
aCHTiDIVERSiON TstraxTURE
- V
r//" '
(3l ARCADIS
y ^ [ •' m
lt^_Fr.Tn„r|;
Settlement Confidential - FOIA Exempt
TSCA Disposal Evaluation According to Fox River Protocol
-'rf'*^'..,?;:"t^
Locat ion
P2FP-053
P2RT-6-2
P2BN-23
P2BN-24
P2BN-26
^y;^ ^ ,-,:
• • • • • I MDEQ
Sample ID
N/A
N/A
PSD-36 and PSD-37
PSD-36 and PSD-37
PSL-40
" . .VI .., • '.„„
Removal Depth
12 inches
18 inches
12 inches
12 inches
24 inches
i
:. I ,;, . : - " . , • . . '
Sample Interval Top (In)
0 6
12 0 2 6
12 18 24 0 6 12 14 0 6
12 20
0
6
8
12
19
Bot tom
(in) 6 12 24 2 6 12 18 24 27 6 12 14 21 6
12 20 24
6
8
12
19
23
'wu>*. * "'-
Thickness
(in) 6 6
12 2 4 6 6
6 3 6 6 2 7 6 6 8 4
6
2
4
7
4
ARCADIS PCB
(mg/kg) 13J 60 J 0.92 43.4 100 22.6
0.086 0.086 0.054 0.88 0.27 0.27
ND (0.064 U) 1.1
0.46 J 0.13
ND (0.082 U)
7.6 J
8.4 J
8.4 J
45
45
MDEQ PCB
(mg/kg)
80 66 66
80 66
47
47
73
73
^ ^ ^ B ' m
,"«S';,.„\.:..:i..
Average PCB
(mg/kg
41 33 33
0.032 41 33
0.13 0.041
27
28
41
59
45
1 Non-TSCA | B > Not Included In calculatbn |
h ^ggjgj^g^
rii^lHiltoi Depth-
Weighted PCB
36.5
34.6
36.9
37.1
42.5
h
.. . , . t ) ' • " • ^ 1 * :'. . , ^
TSCA Determinat ion
Non-TSCA
Non-TSCA
Non-TSCA
Non-TSCA
Non-TSCA
^ / ' ^ - • ^ ' , -
• H H S H B
j ^ ^ ^ ^ ^ ^ ^ ^ ^ H
^ ^ ^ ^ M
( S I ARCADIS 10