WI0500499_Appendix A_20101217

ARCAD1S
1st Performance
Monitoring Report for
the ERD Pilot Test
Appendix A - ER Survey
Test Results
mallinckrodt performance monitoring report_final.docx

ARCADIS
MEMO
To:
Don Malone
Joe Quinnan
From:
Alan Pinnix
Boyce Clark
Date:
17 December 2010
Copies:
ARCADIS Project No.:
NC107014.0005
Subject:
Geophysical Study Update, Mallinckrodt Raleigh Pharmaceutical Plant, Raleigh,
North Carolina.
The purpose of this memorandum is to provide an update of new results for a
geophysical survey conducted on November 5 and 6, 2010 at the above referenced
facility. This memorandum is a supplement to the Two -Dimensional Resistivity and
Magnetic Geophysical Investigation (ARCADIS July 2010) report that discussed the
results of an initial geophysical survey conducted at the Site during the week of May
24, 2010.
Background
In May 2010, three 2-dimensional electrical resistivity surveys and a single
magnetometry survey were conducted at the above referenced site. The primary
objective of the initial survey was to identify the location, depth, and/or orientation of
the subsurface geological feature(s) that are causing the unique migration patterns
for the Site constituents dissolved in groundwater. The original proposed
geophysical surveys included both a magnetometry survey and an electrical
resistivity survey. However, the magnetometry survey was conducted first to attempt
to confirm whether a diabase dike could be present. Following the determination that
diabase was not present at the site, magnetometry surveys were not conducted on
the other two lines.
G:\ENV\Mallinckrodt (Groundwater)\NC107014.0005 (Hi -Res Characterization) \ER Survey Results \December 2010\December 2010 Geophysics Memo.docx
ARCADIS G&M of North Carolina, Inc.
801 Corporate Center Drive
Suite 300
Raleigh
North Carolina 27607
Tel [phone]
Fax [phone]
ARCADIS GSM of North Carolina, Inc.
NC Engineering License # C-1869
NC Surveying License # C-1869
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ARCAD1S
Three resistivity survey lines were conducted at the Site along transects to the long
and narrow dissolved -phase groundwater plume to evaluate the potential for and to
determine the location of subsurface geological conditions that are creating a
preferential migration pathway below the Site.
Based on the results of this work, ARCADIS determined that several large
preferential migration pathways exist below the Site. These pathways were generally
located orientated north to south, exist at approximately 30 to 50 feet below land
surface (ft bls) and align with areas containing groundwater impacted with 1,2-
dichloroethane; 1,2-dichloropropane; aniline, nitrobenzene, and other constituents.
Based upon the confirmation of north to south trending preferential pathways a
second supplemental geophysical survey was conducted in November 2010. This
survey was conducted to determine if the linear features extended further north
beneath the main manufacturing area and also south of Durant Road. The results of
this investigation are presented in the following sections.
Resistivity Survey
The second resistivity survey was conducted the week of November 1, 2010. The
Site layout, location of monitoring wells, and all geophysical survey lines for the
property are shown on Figure 1.
Two additional geophysical transects (Lines 4 and 5) totaling approximately 1,290
linear feet were completed at the Site during this event. Line 4 was oriented east -
west north of the main manufacturing area (Figure 1). The line originated south of
the Raw Waste Surge Tank and north of the Sludge Holding Pond. The line then
extended east to the south of the MASL tank #1, crossed under the railroad spur and
then extended the width of the former B.Q. Pond prior to terminating at an asphalt
road that leads to Building 15. This orientation represented the greatest potential for
getting a continuous line of data across the site due to site limitations (roads,
buildings, piping, rail spur, etc).
Line 5 extended west to east in the large wooded tract south of Durant Road. The
line was started approximately 300 feet west of the intermittent stream to cross the
area historically exhibiting impacted groundwater. To the east of the stream, the line
was extended another 250 feet east in the direction of Capital Boulevard (Figure 1).
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ARCAD1S
Electrical Resistivity Technique
The electrical resistivity method involves the measurement of the apparent resistivity
of subsurface soils and rock as a function of depth and/or position. The resistivity of
soils and rock is a complex function of porosity, permeability, ionic content of the
pore fluids, and degree of clay mineralization.
During a resistivity survey, current is injected into the earth through a pair of current
electrodes and the potential difference (voltage) is measured between one or more
pairs of potential electrodes. The current and potential electrodes are generally
arranged in a linear fashion with the geometry of the current and potential electrodes
being referred to as an array. Common arrays include the Schlumberger array
(normal and inverse), and the dipole -dipole array. Similar to the initial event, both the
dipole -dipole and inverse Schlumberger arrays were used in this study.
The resistivity equipment used during this investigation consisted of an Advanced
Geosciences, Inc. (Austin, Texas), SuperStingT" R8/IP memory earth resistivity
system with a 112-electrode switch box, electrode cables with a 3-meter connector
spacing, and stainless steel electrodes.
Upon completion of data acquisition, initial and terminal electrode locations for each
line as well as electrode locations in areas with significant topographic changes were
marked with flags and general elevation changes recorded. These data can be used
to establish elevation changes along the transects so that the geophysical data could
be corrected for terrain during processing. The terrain change along the transects
was minimal for Line 4 so no topographic correction was needed. Terrain correction
was made for Line 5.
Resistivity data were stored in the internal memory of the SuperSting R8/IP and
downloaded to a laptop computer upon completion of each survey. Field data files
were assigned a name that included Line name and array type. Preliminary
modeling of the field data was conducted in the field in order to optimize the
subsequent data collection.
Survey Line 4 — Electrical Resistivity Results
The inverted resistivity model for data collected along Survey Line 4 is presented on
Figure 5. A quality assurance check of the dataset indicated high quality data for the
eastern section of the line. Between the 0 mark and approximately 300 feet data
were collected; however, the data was dropped out during data processing due to
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ARCAD1S
apparent interferences most likely related to the existing MASL tank area and
lagoons. As this location represented the greatest likelihood for success in the
northern manufacturing area, a second line was not attempted. Between the 300 foot
mark and the 750 foot eastern end of the line, high quality data were obtained.
Processing of the data indicated a single large conductive feature at the approximate
600 foot mark of the line. This line is close to the location of former recovery well
RW-1. The geologic feature (Labeled 4A) was located at approximately 30 to 50
feet bls. This feature is consistent with both the depth and orientation (north to
south) of suspected conductive features seen in other transects.
The location of anomaly 4A is in consistent alignment with historic groundwater maps
depicting constituents of concern in this portion of the site trending north to south.
Survey Line 5 — Electrical Resistivity Results
The inverted resistivity model for data collected along Survey Line 5 is presented on
Figure 6. A quality assurance check of the dataset indicated high quality data for the
majority of the line. The data removal was uniform throughout the dataset except for
the area approximately 320 feet down the line, which corresponds with the crossing
of an intermittent stream channel. The primary geologic features apparent in the
pseudosection are three highly conductive areas (labeled 5-A through 5-C), located
from 30 to 50 feet bls. All three conductive features are consistent with the response
of material with higher water saturation than the surrounding material. The large
feature labeled as 5-C may appear larger than it actually is due to interference
(saturated soils) from the intermittent stream channel. The location and depths of
these features line up exceptionally well with features in the other survey lines. In
particular, the features match up well with survey line 2 located north of Durant Road
(Figure 7).
Conclusions
The resistivity results of all five lines completed to date are consistent with the current
conceptual site model that a fault, fracture, or more likely a linear, heterogenic,
partially weathered zone is trending north -south through the Site. The large
conductive feature present in all five pseudosections is approximately the same size
and depth on each line. The conductive features are presented in plan view on
Figure 7 and labeled.
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ARCAD1S
The results obtained from this geophysical survey correlate well with historic
groundwater data and the prior resistivity survey conducted in May 2010. These
results further strengthen the conceptual model for the site and suggest these
features likely play a significant role in controlling the groundwater flow direction at
the site. Additional investigations are planned in early 2011 to evaluate and compare
the hydraulic properties of the aquifer within and outside of the geologic feature
including:
• Installation of soil borings within and adjacent to the primary geologic feature
within resistivity survey Line 3 (Figure 1) to evaluate soil types grain size
variances, and distribution of chemical constituents.
• Conversion of two of the borings within the primary geologic feature into
multi -purpose monitor wells.
• Hydraulic testing within the two new wells, and other select wells within the
geologic feature.
• Single -well tracer testing using fluorescein dye to evaluate groundwater flux
within and outside of the geologic feature.
An underground injection control (UIC) permit application was submitted to the North
Carolina Department of Environment and Natural Resources (NCDENR) on
December 9, 2010. ARCADIS anticipates NCDENR requiring at least 60 days to
review and approve the permit application. Therefore, the tracer testing likely will be
conducted February 2011. This schedule is dependent on NCDENR's review and
approval of the document. In the mean time, ARCADIS is planning to install the soil
borings and multi -purpose wells at the Site during the week of January 10, 2011.
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0
125
ARCAD1S
250
U:\ projects \Mallinckrodt\ArcMap\FIGURE01_v2.mxd
500
Feet
Resistivity Survey Line Locations
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
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PROJECT MANAGER DEPARTMENT MANAGER
Don Malone
DATE
12.13.2010
PROJECT NUMBER
NC107014.0005.00200
DRAWN
JWC
FIGURE NUMBER
1
Utrojects Mallinckrodt \ Output \ FINAL FIGURES \FIGURE01_v2.pdf

0
0
60 -
4—
Q 120 -
0
180 -
240
Inverted Resistivity Pseudosection - Inverse Schlumberger / Dipole -Dipole Merged Array
Utility lines (water/steam)
10' deep
100' 200' 300' 400' 500' 600'
Iteration = 7 RMS = 5.39% L2 = 3.17 Electrode Spacing = 9.84 ft
700' 800' 900' 1000' 1095'
Ohm-m 100000
- 6700
- 445
- - 30
ARCAD1S
Magnetic Response and Electrical Resistivity Pseudosection
Survey Line 1
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
PROJECT MANAGER:
Don Malone
DEPT. MANAGER:
DATE:
07.20.2010
DRAWN BY:
SDR
PROJECT NUMBER:
NC107014.0005.00200
FIGURE NUMBER:
2

a)
0
Nano Tesla (nT)
0
0
50
100
150
200
2500
2000
1500
1000
500
0
-500
-1000
-1500
Inverted Resistivity Pseudosection - Inverse Schlumberger / Dipole -Dipole Merged Array
MWPP-17
100' 200'
Utility lines (water/steam) MWPP-16
0' deep
Chain Link FenceI
300'
Iteration = 8 RMS = 5.53% L2 = 3.26 Electrode Spacing = 9.84 ft
0
MWPP-8 MWPP-9
'Underground utility (gas)
500'
Magnetic Susceptibility Response - Vertical Gradient
600' 700' 800' 815'
100' 200' 300' 400' 500' 600' 700' 800' 815'
viererNseroriemormounnoloballioollaimilwironllern
Ohm-m
m- 100000
- 6700
- 45
- 30
2
ARCAD1S
Electrical Resistivity Pseudosection and Magnetic Susceptibility Response
Survey Line 2
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
PROJECT MANAGER:
Don Malone
DEPT. MANAGER:
DATE:
07.20.2010
DRAWN BY:
SDR
PROJECT NUMBER:
NC107014.0005.00200
FIGURE NUMBER:
3

4_
Inverted Resistivity Pseudosection - Inverse Schlumberger / Dipole -Dipole Merged Array
0 100' 200' 300' 400' 500' 600'
+18
0
33 -
83 -
a
a)
0
134 -
185
1
L3-A
Utility lines (water/steam)
0' deep
3=
700'
L3-
M W-Y
800' 815'
Iteration = 8 RMS = 3.04% L2 = 1.02 Electrode Spacing = 9.84 ft
0
Ohm-m
40000
MIL
- 4229
- 447
- 47
5
ARCAD1S
Magnetic Response and Electrical Resistivity Pseudosection
Survey Line 3
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
PROJECT MANAGER:
Don Malone
DEPT. MANAGER:
DATE:
07.20.2010
DRAWN BY:
SDR
PROJECT NUMBER:
NC107014.0005.00200
FIGURE NUMBER:
4

0
100'
Inverted Resistivity Pseudosection - Inverse Schlumberger / Dipole -Dipole Merged Array
200'
300'
Iteration = 6 RMS = 10.74% L2 = 11.70 Electrode Spacing = 9.84 ft
400'
500'
600'
700'
750'
Ohm-m
5000
- 595
- 71
- 8
ARCAD1S
Electrical Resistivity Pseudosection
Survey Line 4
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
PROJECT MANAGER:
Don Malone
DEPT.MANAGER:
DATE:
12.10.2010
DRAWN BY:
SDR
PROJECT NUMBER:
NC107014.0005.00200
FIGURE NUMBER:

0
0
Inverted Resistivity Pseudosection - Inverse Schlumberger / Dipole -Dipole Merged Array
100' 200' 300'
Intermittent Stream Channel
400' 500' 540'
21 -
43 -
a)
0
64 -
86
Iteration = 7 RMS = 5.79% L2 = 3.72 Electrode Spacing = 9.84 ft
J
Ohm-m
10000
- - 2060
- - 424
- - 87
18
ARCAD1S
Electrical Resistivity Pseudosection
Survey Line 5
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
PROJECT MANAGER:
Don Malone
DEPT.MANAGER:
DATE:
12.10.2010
DRAWN BY:
SDR
PROJECT NUMBER:
NC107014.0005.00200
FIGURE NUMBER:

0
125
ARCAD1S
250
U:\ projects \Mallinckrodt\ArcMap\FIGURE05_v2.mxd
500
Feet
Resistivity Survey Line Locations
MALLINCKRODT INC.
RALEIGH PHARMACEUTICAL PLANT
RALEIGH, NORTH CAROLINA
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PROJECT MANAGER DEPARTMENT MANAGER
Don Malone
DATE
12.15.2010
PROJECT NUMBER
NC107014.0005.00200
DRAWN
JWC
FIGURE NUMBER
1
Utrojects Mallinckrodt \ Output \FINAL FIGURES \FIGURE05_v2.pdf