9209_Wake_NorthWake_Unlined_MSWLF_CAPAddendum_FID1323637_20190701

North Wake Unlined Landfill
Facility Permit No. 9209-MSWLF-1984
Corrective Action Plan
Addendum
Wake County
Prepared July 2019
WAKE
COUNTY
NORTH CAROLI NA

Table of Contents
Section1 Introduction.....................................................................................................1-1
1.1 Site Background........................................................................................................................................................1-1
1.2 Site Geology and Hydrogeology..........................................................................................................................1-2
1.2.1 Site Geology...................................................................................................................................................1-2
1.2.2 Site Hydrogeology.......................................................................................................................................1-3
1.3 Contaminant Distribution.....................................................................................................................................1-4
1.3.1 Groundwater Quality.................................................................................................................................1-4
1.3.2 Surface Water Quality...............................................................................................................................1-5
1.4 Site Conceptual Model............................................................................................................................................1-5
Section 2 Contaminant Characterization..........................................................................
2-1
2.1 Contaminants of Concern......................................................................................................................................
2-1
2.2 Contaminant Source Confirmation....................................................................................................................
2-1
2.3 Source Control Measures.......................................................................................................................................
2-1
2.3.1 Capping............................................................................................................................................................
2-1
2.3.2 Gas Recovery System.................................................................................................................................
2-1
2.3.3 Air Sparging...................................................................................................................................................
2-2
2.4 Groundwater End Use.............................................................................................................................................
2-2
2.5 Sensitive Receptor Pathways - Risks...............................................................................................................
2-2
2.6 Exposure Pathways - Risks..................................................................................................................................
2-2
2.7 Background Concentrations.................................................................................................................................
2-3
2.8 Exceedances of Groundwater Quality Standards........................................................................................
2-3
2.9 Exceedances of Surface Water Quality Standards......................................................................................
2-3
2.10 Media of Concern....................................................................................................................................................
2-3
Section 3 Selected Remedy and Technical Approach........................................................ 3-1
3.1 Selected Remedy....................................................................................................................................................... 3-1
3.2 Technical Approach................................................................................................................................................. 3-1
3.2.1 Injection Well Installation....................................................................................................................... 3-2
3.2.2 pH Buffering Verification......................................................................................................................... 3-3
3.2.3 Injection System..........................................................................................................................................3-3
3.2.4 EAB Injection................................................................................................................................................3-4
3.2.5 Injection Procedures.................................................................................................................................. 3-5
3.3 Performance................................................................................................................................................................ 3-5
3.4 Reliability..................................................................................................................................................................... 3-6
3.5 Ease of Implementation......................................................................................................................................... 3-6
3.6 Safety, Cross -Media Impacts, Control of Exposure to Residual Contamination, and Community
Factors............................................................................................................................................................. 3-6
3.7 Time............................................................................................................................................................................. 3-6
3.8 Costs............................................................................................................................................................................. 3-6
3.9 Ability to Meet the Corrective Action Measure Objectives..................................................................... 3-7
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Remediation Plan
Section 4 Evaluation of Effectiveness and Report Submittals ............................................ 4-1
4.1 Physical and Chemical Changes in Aquifer Conditions.............................................................................4-1
4.2 Physical and Chemical Changes in Plume Characteristics.......................................................................4-1
4.3 Refining the Site Conceptual Model..................................................................................................................4-1
4.4 Post -Injection Monitoring.....................................................................................................................................4-1
4.4 Report Submittals.....................................................................................................................................................4-1
Section 5 Contingency Plan.............................................................................................. 5-1
Section 6 Schedule and Maintenance............................................................................... 6-1
6.1 Timeline........................................................................................................................................................................ 6-1
6.2 Operation and Maintenance.................................................................................................................................6-1
6.3 Safeguard Measures and Site Security.............................................................................................................6-1
6.4 Modifications to the Approved Corrective Action Plan Addendum....................................................6-1
Section 7 Completion of Corrective Action....................................................................... 7-1
List of Figures
Figure 1-1 Site Location Map
Figure 1-2 Site Map
Figure 1-3 Potentiometric Surface Map
Figure 1-4 Total Volatile Organic Compounds Isocontour Map
Figure 1-5 MW-5R - Total Volatile Organic Compounds Trend
Figure 1-6 MW-34 - Total Volatile Organic Compounds Trend
Figure 1-7 MW-34d - Total Volatile Organic Compounds Trend
Figure 2-1 Conceptual Site Model
Figure 3-1 Injection Well Location Map
List of Tables
Table 1-1 Monitoring Well Construction and Groundwater Elevation Data
Table 1-2 Groundwater Analytical Summary
Table 1-3 Monitored Natural Attenuation Summary
Table 3-1 Injection Cost Estimate
Appendices
Appendix A Health and Safety Plan
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Section 1
Introduction
This Corrective Action Plan (CAP) Addendum has been prepared by CDM Smith Inc. (CDM Smith),
on behalf of Wake County, for the North Wake Unlined Landfill (Site), Facility Permit Number
9209-MSWLF-1984. The CAP Addendum is in accordance with Wake County's approval on April
25, 2019, of an amendment to the Basic Services Agreement with CDM Smith to provide in situ
groundwater corrective action at the Site.
1.1 Site Background
The Site is a closed, unlined municipal solid waste landfill (unlined landfill) that was used by
Wake County and is located at 9209 Deponie Drive in Raleigh, Wake County, North Carolina. The
property also consists of the closed Subtitle D and C&D landfills. The Site is located north of the
Subtitle D landfill and is surrounded by a chain -link fence with locking gates. Abbotts Creek and
an unnamed tributary of Abbotts Creek border the Site to the north and south, respectively.
Residential homes are located to the north and west, with wooded areas and grassed fields to the
east. A Site location map is shown on Figure 1-1.
The approved groundwater monitoring network at the Site includes the following wells and
surface water locations: MW-11 (shallow background well), -11d (deep background well), -5R, -6,
-6d, -7, -8, -8d, -9, -10, -10d, -22, -23, -23d, -24, -28, -28d, -29d, -30, -31, -31d, -32, -33, -34, -34d,
-35, -36, -36d, TB-1a, TB-1a deep and surface water sampling locations: SW-2, -3, -7, and -8.
Groundwater monitoring wells and surface water locations are shown on Figure 1-2, with the
exception of the background monitoring wells and SW-2. MW-11, -11d, and SW-2 are shown on
Figure 1-1.
A permanent soil gas migration system consisting of 78 gas extraction wells was installed along
the western, northern, and eastern perimeter of the Site in November 2003 due to landfill gas
migration beyond the limits of waste. Continued monitoring and adjustments have resulted in
successful control of gas migration around the perimeter of the landfill.
In May 2008, the North Carolina Department of Environmental Quality (NCDEQ) - Solid Waste
Section (SWS) expressed concern that volatile organic compounds (VOCs) may be migrating
beyond the Site property boundary based on detections above the 15A NCAC 02L .0202 (NC 2L)
Standards in monitoring well MW-9. At the request of the SWS, additional groundwater
assessment wells MW-36 and -36d were installed downgradient of MW-9. Subsequent sampling
determined that several VOCs were exceeding the NC 2L Standards.
In 2009, CDM Smith, on behalf of Wake County, submitted a Groundwater Corrective Action
Permit Modification and CAP for the Site to the SWS in accordance with the North Carolina Solid
Waste Management Rule 15 NCAC 13B .1636. Monitored Natural Attenuation (MNA) and
institutional controls paired with in situ remediation by air sparging was selected as the remedy
to address VOCs in groundwater in the vicinity of groundwater monitoring wells MW-6, -6d, -9,
-36, and -36d at the Site. As part of the CAP, a contingency plan of enhanced anaerobic
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Section 1
bioremediation (EAB) would be used if the air sparging system was ineffective or as an
alternative to air sparging. Since implementation, the air sparging system has been effective in
reducing the detected VOCs in the vicinity of MW-6, -6d, -9, -36, and -36d.
The air sparging system was installed in October 2011 and consists of 15 shallow wells screened
across saturated saprolite and partially weathered rock and 14 wells screened in the shallow
fractured bedrock. In addition to the air sparging wells, the system also consists of an air
compressor and control panel that are housed in a secured on -site control building.
Concentrations of VOCs in the area of wells MW-5R, -34, and -34d exceed the NC 2L Standards
beyond the Site property line. Because these wells are located more than 900 feet away from the
air sparging system, expansion of the air sparging system into this area would not be feasible.
Corrective action in this area of the Site to reduce total VOC concentrations in groundwater will
be accomplished with the following:
■ In situ EAB by adding substrates such as sodium lactate and emulsified vegetable oil
(EVO) upgradient of MW-SR, -34, and -34d within the surficial aquifer;
■ Geochemical evaluation of the subsurface to determine if pH buffering is necessary to
support the EAB in order to enhance the already reducing conditions and provide a
source of carbon and energy to the existing groundwater microbial community;
■ A follow-up injection of EVO; and
■ Bioaugmentation, if necessary.
1.2 Site Geology and Hydrogeology
1.2.1 Site Geology
The Site is located in the Piedmont Physiographic Province, which is characterized by gentle to
steep, hilly terrain with small quantities of alluvium. Saprolitic soils are common in the Piedmont
Province and are characterized by bright colors, preserved structures, and can contain an
abundance of clay minerals (Gair, 1989). A transition zone is typically found between the
saprolite and bedrock and generally consists of highly weathered bedrock.
According to the North Carolina Geologic Map (Brown and Parker, 1985), the Site is located
within the Raleigh Belt, which is characterized by large areas of plutonic, metavolcanics,
metamorphic rocks, and very few sediments. The age of the Raleigh Belt is estimated to range
from 500 to 196 million years old, and sediment deposits range from 63 to 2 million years old.
According to the geologic map, the Raleigh Gneiss underlies the Site.
Site geology is based on previous well installation activities and the landfill gas migration system.
The subsurface geology at the Site is highly variable. Generally, the Site is covered by 4 to 6 inches
of detritus, topsoil, and root mat. Underlying the topsoil is a layer of reddish -brown silty clay. This
silty clay is typically encountered at a depth of 7 to 17 feet below ground surface (bgs). The silty
clay is underlain by a light brown, fine-grained sandy silt saprolite with varying amounts of mica.
Occasionally, zones of silty sand saprolite as pegmatite or granite are encountered below the silty
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Section 1
clay. Generally, the saprolite grades into partially weathered rock to the top of bedrock. The depth
to bedrock ranges from 15 to greater than 65 feet bgs.
In some areas, a 4-to -6-inch cover of topsoil and root mat is underlain by a light to medium
brown sandy silt alluvial deposit. This overburden varies from 5 to 15 feet thick. Below the
alluvial layer is a light brown sandy silt saprolite with varying amounts of mica.
Cuttings obtained when drilling bedrock monitoring wells revealed bedrock that varied from
schistose to granitic. Generally, the bedrock was highly weathered and fractured for the first 20 to
30 feet below auger refusal.
1.2.2 Site Hydrogeology
Groundwater in the vicinity of the Site occurs in the saprolite horizon and within the fractures of
the crystalline bedrock. The transition zone beneath the saprolite is generally the zone in which
most lateral groundwater flow takes place (Daniel, 1987). This zone has the permeability of the
crystalline material enhanced by shrink and swell cracking caused by the hydration of mineral
grains. Weathering of grains in the transition zone is much less than in the saprolite, where
formation of clay minerals by weathering often inhibits groundwater flow. Groundwater flow and
the depth of the water table in the transition zone generally mirrors, and is largely controlled by,
surface topography. The depth of the water table in the Piedmont tends to vary seasonally in
response to precipitation and the growing season. From mid -April through October, vegetation
intercepts much of the infiltrating precipitation before it reaches the water table, and
evapotranspiration rates are increased. Generally, the water table will rise and fall with the
seasons (i.e. highest in the spring and lowest in the fall).
The monitoring wells installed around the Site are generally completed to depths corresponding
with the top of rock and are considered representative of the saprolite/transition zone within the
surficial aquifer. Several monitoring wells were also installed in the deeper bedrock aquifer.
Figure 1-3 provides a groundwater potentiometric surface map in the saprolite/transition zone
based on groundwater elevations obtained during the April 2019 sampling event. Well
construction details and groundwater elevation data are provided in Table 1-1. The
potentiometric contours indicate an easterly groundwater flow direction with localized flow
towards Abbotts Creek and the unnamed tributary of Abbotts Creek to the north and south,
coincident with the Site topography prior to landfill activities. The small perennial streams to the
north and south appear to act as groundwater discharge features. Abbotts Creek continues to
flow east where it eventually discharges into the Neuse River.
It is probable that groundwater elevations beneath the unlined landfill are higher than those
indicated by Figure 1-3 because of a mounding effect that occurs beneath unlined landfills. As a
result, radial groundwater flow away from the Site has likely occurred. Typically, such radial flow
patterns dissipate within relatively short distances, beyond which the groundwater assumed a
more typical flow direction. Additionally, the installation of an impermeable cap in 1997 has
likely caused a reduction in the mounding of groundwater beneath the landfill.
In situ slug tests were performed on monitoring wells MW-5, -6, -7, -8, -9, -10, -22, -23, and -24 to
measure transmissivity and horizontal hydraulic conductivity based on an assumed surficial
aquifer thickness of 25 feet. Horizontal hydraulic conductivity ranges from 17.56 feet/day
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Section 1
(ft/day) (3.73x10-3 centimeters/second (cm/sec)) in MW-36 to 0.07 ft/day (2.47x10-5 cm/sec) in
MW-22.
1.3 Contaminant Distribution
1.3.1 Groundwater Quality
Groundwater characterization at the Site includes semi-annual groundwater sampling from
MW-11, -11d, -5R, -6, -6d, -7, -8, -8d, -9, -10, -10d, -22, -23, -23d, -24, -30, -31, -31d, -32, -35, -36,
-36d, TB-1a, and TB-1a deep, and annual groundwater sampling for MW-28, -28d, -33, -34, and,
-34d. All groundwater samples are analyzed for North Carolina Appendix I VOCs plus
dichlorodifluoromethane and 1,4-dioxane (introduced to the sampling program in the fall of
2018), and Appendix I metals plus mercury. Samples from monitoring wells MW-5R, -6, -8, -9, -10,
-11, and -36 are also analyzed for MNA parameters (i.e. biochemical oxygen demand, chemical
oxygen demand (COD), alkalinity, nitrate, chloride, sulfate, sulfide, total organic carbon, carbon
dioxide, methane, ethane, ethene, ferrous iron, volatile fatty acids, dissolved hydrogen, and field
measurements of pH, temperature, conductivity, oxidation reduction potential (ORP) and
dissolved oxygen (DO)) per the CAP. A summary of all detected and estimated concentrations
from the March 2011 through the April 2019 sampling events is provided in Table 1-2. MNA
parameters are presented in Table 1-3. An isocontour map for total VOCs from the April 2019
sampling event is shown on Figure 1-4.
Monitoring wells MW-SR, -6, -6d, -8, -9, -10, -10d, -22, -23, -24, -34, -34d, -35, -36, and TB-1a have
had detections of VOCs above the NC 2L Standards. Since the implementation of the air sparging
system, concentrations of VOCs in MW-6, -6d, -9, -36, and -36d have decreased. Detected
concentrations of MNA parameters have varied from event to event, but occurrences of key
parameters from certain wells are fairly consistent. In general, it appears that based on the
concentrations of geochemical parameters and the VOC concentrations for select monitoring
wells, the following evidence indicates that one or more mechanisms of natural attenuation
and/or reductive dichlorination may be occurring at the Site:
■ VOC concentrations in groundwater continue to decline;
■ The ratio of parent to daughter compounds continues to decrease over time;
■ Nitrate, ferrous iron, sulfate, and carbon dioxide continue to be detected at concentrations
favoring reductive dechlorination; and
■ Concentrations of cis- 1,2-dichloroethene continue to be greater than dichloroethene
isomers trans 1,2-dichloroethene and 1,1-dichloroethene.
There have been recent and historic detections of chloroform in monitoring wells MW-6d, -24,
-31d, and TB-1a deep. These detections are attributed to a release from a municipal water line in
the Falls River development and are not related to a release from the unlined landfill.
Since April 2006, there have been detections of benzene, 1,4-dichlorobenzene, 1,1-
dichloroethane, methylene chloride, tetrachloroethene, trichloroethene, and vinyl chloride in the
area of MW-SR, -34, and -34d that exceed the NC 2L Standards beyond the landfill property line.
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Section 1
These wells are located more than 900-feet away from the air sparging system. Figures 1-5
through -7 show historic VOC trends for MW-SR, -34, and -34d, respectively.
There have been numerous Appendix I metal and mercury detections in all monitoring wells
across the Site. Antimony, beryllium, cadmium, chromium, cobalt, lead, mercury, thallium, and
vanadium have been detected above their respective NC 2L or Interim Maximum Allowable
Concentration (IMAC) Standards. As part of an ongoing Alternate Source Demonstration (ASD) for
the Site, filtered samples are collected from monitoring wells with elevated turbidity (i.e. greater
than 10 Nephelometric Turbidity Units). These samples are collected to demonstrate that select
metals exceeding the NC 2L or IMAC Standards are naturally occurring and not related to a
release from the landfill. Total metals that exceed the NC 2L or IMAC Standards are analyzed for
dissolved metals to determine if turbidity is a contributing factor to total reported metals.
Dissolved metal sample results are provided in Table 1-2. Based on qualitative and quantitative
evaluation of current and historic groundwater sampling data, the NC 2L or IMAC Standard metal
exceedances are determined to be indicative of naturally occurring background concentrations as
opposed to a release from the landfill.
1.3.2 Surface Water Quality
Surface water samples SW-2, -3, -7, and -8 are analyzed semi-annually for North Carolina
Appendix I VOCs plus dichlorodifluoromethane and 1,4-dioxane, and Appendix I metals plus
mercury. There have never been detections of VOCs above the 15A NCAC 02B (NC 213) or North
Carolina Protective Value Surface Water Quality Standards for Class C Waters at any surface
water location. Several metals including barium, chromium, copper, lead, silver, vanadium, and
zinc have been detected above the NC 2B Standards but are attributed to naturally occurring
conditions. A summary of the detected and estimated concentrations from the March 2011
through the April 2019 sampling events is provided in Table 1-2.
1.4 Site Conceptual Model
Except for chloroform, all available data and historical investigations at the Site confirm that the
unlined landfill is the source of VOCs observed in groundwater. Groundwater flows in an easterly
direction consistent with the Site topography. The surficial aquifer discharges to Abbotts Creek
and the unnamed tributary of Abbotts Creek to the north and south, respectively, and ultimately
to the Neuse River to the east. Surface water data shows that VOCs are not present above
applicable standards.
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Section 2
Contaminant Characterization
Characterization activities at the Site have focused on delineating the horizontal and vertical
extents of metals and VOCs in groundwater and surface water. The groundwater and surface
water results are compared to the NC 2L Standards and NC 2B Standards, respectively. The
characterization results and mitigation efforts to date are summarized below.
2.1 Contaminants of Concern
Contaminants of concern are compounds that pose a threat to human health and the environment
based on concentrations above regulatory limits. In general, the occurrences of VOCs above NC 2L
Standards have been decreasing since beginning sampling activities, as shown in Table 1-2.
However, there have been VOC detections above the NC 2L Standards in monitoring wells
MW-5R, -34, and -34d beyond the property line on the eastern side of the Site. The following
VOCs in groundwater are the contaminants of concern based on NC 2L Standard exceedances:
benzene, 1,4-dichlorobenzene, 1,1-dichloroethane, methylene chloride, tetrachloroethene,
trichloroethene, and vinyl chloride.
As described in Section 1.3.1, the metal detections above the NC 2L and IMAC Standards are being
evaluated through an ongoing ASD. Based on qualitative and quantitative evaluation of current
and historic groundwater sampling data, the NC 2L or IMAC Standard metal exceedances are
determined to be indicative of naturally occurring background concentrations as opposed to a
release from the landfill. Metals are therefore not listed in the contaminants of concern for the
Site.
2.2 Contaminant Source Confirmation
With the exception of chloroform, all available data and historical investigations at the Site
confirm that the unlined landfill is the source of groundwater contamination.
2.3 Source Control Measures
Source control is currently accomplished by capping, landfill gas recovery, and air sparging.
2.3.1 Capping
Capping is performed to reduce infiltration of precipitation, thereby reducing leachate generation
which may impact groundwater. In addition, capping enhances landfill gas recovery. A low
permeability cap was installed in late 1997 as part of the landfill closure.
2.3.2 Gas Recovery System
The generation of landfill gas within a capped, unvented landfill may speed up groundwater
migration by increasing the pressure inside the landfill. Gas recovery, either active (removed by a
vacuum), or passive (vented to the air) reduces pressure by allowing gas to escape. Gas recovery
also removes VOC contaminant mass from the source material. The Site currently uses an active
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Section 2
soil gas recovery system within the waste limits, in addition to the perimeter gas system designed
to recover and mitigate soil gas migration beyond the limits of waste. The active recovery system
was installed in November 1997.
2.3.3 Air Sparging
Air sparging reduces low-level VOC concentrations in groundwater by facilitating volatilization.
The air sparging system was installed in October 2011 and was operational by August 2012. The
air sparging system consists of 15 shallow wells screened across saturated saprolite and partially
weathered rock and 14 wells screened in the shallow fractured bedrock. In addition to the air
sparging wells, the system also consists of an air compressor and control panel that are housed in
a secured on -Site control building. Routine inspections are performed on the system and a Field
Inspection Log completed during each inspection is kept on file at the Site.
2.4 Groundwater End Use
There are no groundwater users within 1,000 feet of the Site. The surficial aquifer discharges
locally to Abbotts Creek and the tributary of Abbotts Creek to the north and south, respectively.
All adjacent property owners are serviced by the City of Raleigh water supply.
2.5 Sensitive Receptor Pathways — Risks
Potential exposure pathways for the Site include the following:
■ Uptake of contaminated groundwater through plants; and
■ Plant and animal exposure to groundwater discharging to surface water.
Uptake of groundwater by plants is minimal as groundwater is generally greater than 10 feet bgs.
In areas near the streams where groundwater levels are less than 5 feet bgs, plant uptake would
pose minimal risk to animals by reduction of contaminant levels through phytoremediation. The
surficial aquifer discharges locally to Abbotts Creek and the tributary of Abbotts Creek to the
north and south, respectively. As discussed in Section 1.3.2, surface water sampling indicates that
contamination is not present.
2.6 Exposure Pathways — Risks
A conceptual Site exposure model is provided on Figure 2-1. Potential exposure pathways for the
Site include:
■ Direct human contact with waste;
■ Human exposure to contaminated surficial groundwater;
■ Human/ecological exposure to contaminated groundwater discharging to surface water;
■ Human exposure to landfill gas vapors migrating in soil or surficial groundwater; and
■ Human exposure to groundwater in deep aquifers.
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Section 2
Site access controls (i.e. fences and gates) and the landfill cap prevents direct human contact with
buried waste by onsite workers and offsite residents. Therefore, exposure through this pathway
is controlled.
The depth to surficial groundwater at the Site is typically greater than 10 feet bgs and averages
greater than 25 feet bgs. As there are no groundwater users at or adjacent to the Site, exposure of
onsite or offsite workers and the public to potentially contaminated groundwater is not likely.
The surficial aquifer discharges locally to Abbotts Creek and the tributary of Abbotts Creek to the
north and south, respectively. As discussed previously, historic surface water sampling indicates
that contamination is not present in surface water.
All potable water adjacent to the Site is provided by the City of Raleigh. Direct contact with
potentially impacted extracted groundwater from either surficial or bedrock aquifers is not likely
in the adjacent residential area.
The permanent gas migration control system around the inside perimeter of the Site controls the
migration of soil gas and reduces the likelihood of exposure to vapors migrating in the soil or
surficial groundwater. Historical groundwater data indicates that the gas migration control
system has been effective in reducing VOC contaminant mass from impacted groundwater. In
addition, the low permeability cap on the landfill reduces the potential exposure to landfill gas
migrating in the soil.
2.7 Background Concentrations
Monitoring wells MW-11 and -11d serve as the background monitoring wells for the Site, as well
as the Subtitle D and C&D landfills. There have been detections of chromium, cobalt, thallium, and
vanadium in the background wells above the NC 2L or IMAC Standards. Historically, arsenic,
beryllium, cadmium, lead, and mercury have also been detected above the NC 2L or IMAC
Standards. No VOCs have been detected in either background well above the standards.
2.8 Exceedances of Groundwater Quality Standards
Benzene, 1,1-dichloroethane, 1,4-dichlorobenzene, methylene chloride, tetrachloroethene,
trichloroethene, and vinyl chloride are routinely detected VOCs in groundwater that exceed their
respective NC 2L Standards. Historically, 1,2-dichloroethane, 1,1-dichloroethene, and cis-1,2-
dichloroethene have also been detected above the NC 2L Standards in some of the monitoring
wells.
2.9 Exceedances of Surface Water Quality Standards
Surface water contamination has not been identified. However, chloromethane, 1,1-
dichloroethane, and methylene chloride have been detected as estimated concentrations below
their respective NC 2B Standards. In addition, estimated metal concentrations are consistent with
background and naturally occurring groundwater concentrations at the Site.
2.10 Media of Concern
Groundwater is the media of concern.
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Section 3
Selected Remedy and Technical Approach
3.1 Selected Remedy
An in situ EAB "biobarrier" injection system was selected as the remedy for the Site based on its
ability to meet a number of criteria and the following objectives:
■ Performance - Long-term and short-term effectiveness and protectiveness of the potential
remedy, along with the degree of certainty that the remedy will prove successful;
■ Reliability - The effectiveness of the remedy in controlling the source to reduce further
releases;
■ Implementation - Ease or difficulty of implementing a potential remedy;
■ Time/Costs - Practical capability of the owner or operator, including a consideration of the
technical and economic capability; and
■ Safety, Cross -Media Impacts, Control of Exposure to Residual Contamination, and
Community Factors - The degree to which community concerns are addressed.
A biobarrier is an in situ biological treatment that involves injecting nutrients, and if necessary,
microorganisms to promote microbial degradation of constituents and/or pH buffering agents.
The agents are injected to create a vertical "biobarrier" that treats groundwater as it passes
through the barrier. Conventional small diameter wells are used for the injections. In addition to
the vertical barrier, the treatment zone will extend downgradient to some extent as the dissolved
bioremediation agent migrates with groundwater.
The substrates proposed for the biobarrier include sodium lactate and EVO. The sodium lactate
injection is intended to create reducing conditions that will favor and support biological
dechlorination of VOCs to non -toxic end products, including ethene and ethane. Biodegradation
can be sustained for as long as sufficient concentrations of substrate remain in the groundwater.
For this reason, EVO will be utilized in a second injection because it is a slow -release substrate,
and therefore should release organic carbon into the groundwater for three to five years,
depending on Site conditions.
A geochemical evaluation of the subsurface to determine if pH buffering by sodium bicarbonate is
necessary to support the EAB will also be performed. The substrate additions will enhance the
already reducing conditions and will provide a source of carbon and energy to the existing
groundwater microbial community. In addition, the microbial population may be augmented.
3.2 Technical Approach
Groundwater quality at MW-SR, MW-34, and MW-34d is assumed to represent the conditions that
will undergo treatment by the EAB. Historical data from these three wells shows that 1,4-
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Section 3
dichlorobenzene, 1,1-dichloroethane, methylene chloride, tetrachloroethene, and trichloroethene
are the VOCs that should be targeted by the treatment because of their frequency of detection
being greater than 25 percent and number of exceedances of the applicable standards.
All of these VOCs can be degraded using EAR Tetrachloroethene and trichloroethene are
degraded by the bacteria dehalococcoides spp. (DHC) according to a well -established pathway
under anaerobic conditions that produces the intermediate breakdown of cis-1,2-dichloroethene
and vinyl chloride before ultimately degrading to ethene and carbon dioxide. Test methods are
currently available for DHC analysis, however, the DHC population is not expected to be
detectable during the treatment because the VOC concentrations are too low to sustain detectable
DHC populations. 1,4-Dichlorobenzene, 1,1-dichloroethane, and methylene chloride also degrade
under anaerobic conditions but do not rely on DHC.
The biobarrier design includes estimating the biobarrier width, which is related to the time
required to treat the VOCs. Based on the different degradation mechanisms and known
degradation rates, CDM Smith anticipates that 1,1-dichloroethane will take the longest time to be
treated and it has a half-life of approximately 2 years. The resulting treatment time is expected to
be approximately 8 months.
The aquifer flow parameters under the influence of the biobarrier must be used to estimate the
biobarrier width that will provide a 1,1-dichloroethane treatment period of 8 months. CDM Smith
applied hydraulic conductivity and effective porosity values that were derived by discarding the
highest and lowest values and taking the average. The resulting hydraulic conductivity was 2.8
ft/day and the effective porosity was 15 percent. CDM Smith assumed a total porosity of 35
percent. The hydraulic gradient of 0.01 ft/ft was derived from MW-5R to -34. The aquifer
thickness in the vicinity of the proposed biobarrier is 27 ft, resulting in a transmissivity of 566
gallons per day per foot.
These parameters result in a groundwater seepage velocity of approximately 70 ft/year.
However, the VOCs will migrate at a slower rate as they are retarded by the greatly increased
organic carbon content from the EVO. CDM Smith conservatively assumed that 25 percent of the
organic carbon from the EVO would be available to retard the VOC migration. Based on this
assumption, the retarded 1,1-dichloroethane seepage velocity would be approximately 48 ft/year
and a biobarrier width of 32 feet would provide 8 months of treatment. The remainder of the
VOCs have degradation rates an order of magnitude lower than 1,1-dichloroethane and should be
sufficiently treated by this biobarrier width.
3.2.1 Injection Well Installation
CDM Smith will install eight injection wells (NWIW-1 through -8), spaced approximately 20-feet
apart, using hollow -stem auger drilling techniques through the partially weathered rock to the
refusal depth (an anticipated depth of 40 feet bgs). This will result in a proposed biobarrier
measuring 160 feet long and the injection will be designed create a biobarrier width of
approximately 30 feet. At each injection well location, a 2-inch diameter, Schedule 40 polyvinyl
chloride (PVC) well will be installed to the top of bedrock. The wells will be constructed with 15-
to 25-feet of 0.010-inch machine slotted screen. A sand pack will be installed to 2 feet above the
screen. A 2-foot thick bentonite seal will be installed on top of the sand pack. The well screen
3-2 Smith

Section 3
depth shall be selected such that the bentonite seal is below the water table. The boreholes will
be grouted to land surface using neat cement emplaced by the tremie pipe method. The wells will
be completed with above -grade protective covers and a 2-foot by 2-foot concrete pad. The top of
the injection well casing will be fitted with PVC 2-inch diameter female National Pipe Threads
attached using a solvent weld for future injection purposes. Injection well locations are shown on
Figure 3-1.
Following a minimum time of 24 hours after grout installation, the injection wells will be
developed. Development will consist of pumping approximately 1.5 gallons per linear foot of
screen. Development will continue should the development water remain excessively turbid.
A short-term injection test will be performed on each injection well and will consist of injecting
potable water under the pressure of gravity for a period of approximately 30 minutes to finalize
the injection design flow rates and pressures. If the flow rate is lower than the design rate of 2
gallons per minute, or the injection pressure exceeds the design pressure, it will need to be
determined whether a contingency well(s) is required, whether revised injection volumes may be
necessary, or additional field time is needed based on injection performance.
All drill cuttings will be spread on the ground surface and all development water will be
discharged to the ground adjacent to the well. Following installation, the wells will be surveyed to
State Plane coordinates. No injection wells will be installed until approval by the SWS and an
Underground Injection Control permit is obtained from the NCDEQ - Division of Water
Resources.
3.2.2 pH Buffering Verification
During the injection well installation, CDM Smith will collect soil and groundwater geochemical
data to evaluate the pH buffering requirements, if necessary. Four soil samples and two
groundwater samples will be collected and tested for pH control purposes. These results will be
used to assess the sodium bicarbonate dosing requirements. The analyses will be completed by
CDM Smith's Denver laboratory and will include measurements of pH and the sodium
bicarbonate buffering capacity.
3.2.3 Injection System
The EAB injection system will consist of a potable water supply, a portable tank for sodium
bicarbonate addition and mixing, an inline chemical feed pump, the substrate (i.e. sodium lactate
and EVO) tank, a well injection manifold, injection distribution hoses, and injection wellheads.
The injection system will be constructed to be watertight with solvent welds for PVC fittings and
thread sealant on all threaded connections.
It is assumed that a sufficient quantity of potable water flow can be obtained from an existing
spigot or valve adjacent the Site on the property. Temporary piping and/or hoses will be used to
transfer the potable water from the supply to a portable 18,000-gallon tank. The water in the tank
will be mixed with sodium bicarbonate for pH control. Batch process mixing will be completed by
recirculating the solution through the tank using a high -volume pump. A submersible pump
powered by a portable generator will be placed into the tank to supply the sodium bicarbonate
solution to the substrate mixing system.
Smith 3-3

Section 3
The substrate mixing system will be portable and staged at the center of the EAB system. The
substrate mixing system will consist of a 275-gallon substrate reservoir and chemical feed pump.
Pressure gauges will be located upstream and downstream of the chemical feed pump. The
chemical feed pump will be set to deliver the substrate at the predetermined volumetric target
donor product percentages. A totalizing flow meter, flow control valve, and pressure gauge will be
supplied for each injection well connection on the manifold.
The injection solution will be piped from the injection manifold to the injection wellheads using a
5/8-inch diameter hose. During injection, the flow control valve will be used to adjust the
individual well injection rates. Injection pressures will be monitored at the manifold and at the
wellhead with the flow rates and pressure reducing valve adjusted to ensure that the design
injection pressures are not exceeded at the injection wellheads.
The injection wellhead assembly will consist of a connection for the delivery hose, shutoff valve, a
pressure gauge for monitoring injection pressure, and an air vent valve. The vent valve is open as
the injection in initiated, and once the wellhead assembly is full of solution, the valve is closed. Air
in the headspace of the wellhead assembly can stop the flow of fluids into the injection well.
3.2.4 EAB Injection
The preliminary injection design will be performed as a phased approach and is based on CDM
Smith's experience with bioremediation and best professional judgement using the current
available data. The design may be adjusted and further detailed based on the pH buffer
investigation results and evaluation of the VOC levels and dechlorinating microbe populations
after the initial sodium lactate injection. However, CDM Smith does not expect the final design to
change significantly from this preliminary design. The sequence of events to initiate treatment
within the EAB is listed below.
1. Inject immediate -release sodium lactate and sodium bicarbonate bioremediation solution.
2. Evaluate if bioaugmentation is necessary.
3. Inject slow -release EVO and sodium bicarbonate bioremediation solution following step 2
results.
4. Repeat step 3 as needed in the future under separate Amendments to maintain treatment.
The design for the initial injection in step 1 is intended to prime the groundwater geochemical
conditions for bioaugmentation. This injection will utilize an immediately bioavailable substrate,
WilClear Plus® sodium lactate formulation (WilClear Plus@). Sodium bicarbonate at
approximately 1.8 percent will be injected to buffer pH, if needed, along with the WilClear Plus®
and potable water. The initial injection design is summarized below.
Initial Injection Design
■ Total Volume:
■ WilClear Plus®:
■ Sodium Bicarbonate:
7,570 gallons per well, 60,560 gallons total
1,320 gallons total, 2.3 percent by volume
6,250 pounds,1.4 percent by weight
3-4
Smith

Section 3
Approximately one month after the sodium lactate injection, groundwater samples will be
collected from one injection well and from monitoring well MW-SR and analyzed for VOCs and
dechlorinating microbe abundance and diversity. Based on observed VOC levels and microbial
population, a determination of bioaugmentation will be made. Bioaugmentation, if necessary, will
be conducted during the EVO injection.
Following the bioaugmentation evaluation sampling, a full-scale EVO injection will be completed.
This injection will utilize a slow release substrate, 98 percent Lact0il® EVO formulation
(Lact0il®). Sodium bicarbonate will be injected to buffer pH, if needed, along with the Lact0il®
and potable water. The EVO injection is summarized below.
First EVO Injection Design
■ Total Volume: 8,365 gallons per well, 66,920 gallons total
■ Lact0il®: 2,115 gallons total, 3.6 percent by volume
■ Sodium Bicarbonate: 6,250 pounds, 1.4 percent by weight
All injections will be followed by a clean water flush to prevent well fouling. The water flush will
consist of approximately 25 gallons of potable water. CDM Smith estimates that injection
pressure should remain below 10 pounds per square inch (psi) to prevent soil rupturing. To be
conservative, a limit of 8.5 psi will be used as the maximum injection pressure. CDM Smith
assumes that minimal pressure will develop at the planned injection flow rate of approximately 2
gallons per minute per well.
3.2.5 Injection Procedures
The water supply lines, the injection system, and injection wells will be monitored during the all
injections for pressure, flow, and leaks. Corrective measures will be taken if leaks or injection
solution surfacing are discovered. Data collection during the injections will be recorded regularly.
The injection data that will be recorded to document the injections includes: daily volume for the
total system, daily volume for each individual well, volume and pressure at each individual well at
approximate 2-hour intervals, volume of flush water following injection completion at each
individual well, volume of substrate reservoir at approximate 2-hour intervals, and pressure at
the chemical feed pressure gauges.
3.3 Performance
EAB is effective for chlorinated VOCs. However, supporting DHC growth may require pH buffering
and bioaugmentation to be effective at the Site. A geochemical evaluation of the subsurface will be
used to determine if pH buffering is necessary.
Because the treated groundwater will continue to migrate, this technology should result in
improved conditions at the boundary and beyond within a reasonable timeframe. Performance of
EAB is considered moderate to high based on the hydrogeology of the Site and the relatively low-
level contamination. Performance of this remedy will be regularly monitored quarterly for a
period of one year following EVO injection through water quality and analytical data from
monitoring wells MW-SR, -34, and -34d. Following the fourth quarterly sampling event, sampling
will return to semi-annually.
Smith 3-5

Section 3
3.4 Reliability
EVO is a slow -release substrate and therefore should release organic carbon into the
groundwater for three to five years, depending on Site conditions. Based on CDM Smith's
experience with this technology, and the success at the Wake County Closed Feltonsville Landfill,
EAB has a moderate to high level of reliability for the Site.
3.5 Ease of Implementation
EAB is considered moderate to implement due to well installation, construction, and equipment
installation requirements.
3.6 Safety, Cross -Media Impacts, Control of Exposure to
Residual Contamination, and Community Factors
No safety, cross -media impacts, or exposure control concerns are expected for the selected
remedy. Site access controls prevents direct human contact with injection wells, which will be
below ground with above -grade protective covers. As there are no groundwater users at or
adjacent to the Site, exposure of onsite or offsite workers and the public to potentially
contaminated groundwater is not likely. Additionally, an injection test will be performed on each
injection well to make sure that the injection pressure does not exceed the design pressure. If the
injection pressure exceeds the design pressure, contingency wells will be installed or injection
volumes will be revised.
3.7 Time
Installation of the EAB system and the sodium lactate injection are anticipated to occur in the first
half of the Fiscal Year 2020 (fall of 2019). The second injection of EVO is anticipated to occur in
the second half of the Fiscal Year 2020 (spring of 2020). Quarterly sampling events will
commence 2 months after the EVO injection is complete and will continue for one year. Section
6.1 provides a timeline of events.
3.8 Costs
The estimated cost to perform EAB at the Site based on a time and materials basis is not to exceed
$229,236. Costs for CDM Smith subcontracted work (i.e. drilling, surveying, and the specialty
analytical laboratory) and injection materials (i.e. sodium bicarbonate, sodium lactate, and EVO)
are provided at a cost plus a 10 percent mark-up per the approved Billing Rate Schedule. A cost
breakdown for anticipated man hours, supplies, materials, other direct costs, and contractor costs
is provided in Table 3-1. The cost estimate includes the following assumptions:
■ No additional studies will be required for design or permitting;
■ The EAB injection meets the "permitted by rule" requirements and will only require a
"Notice of Intent;"
■ Potable water source of sufficient flow and volume is available at the Site and no water
hauling will be required;
CDM
3-6 Smith

Section 3
■ Bioaugmentation will not be needed;
■ Based on the assumed Site conditions, EVO will provide a carbon source for three to five
years following injection;
■ Four post -injection sampling events will be completed quarterly. Two events will be part
of the routine semi-annual sampling; and
■ Analytical costs, with the exception of microbial analysis and pH buffering capacity, will
be direct billed to Wake County from their contracted laboratory.
Documentation of financial assurance requirements was provided in the approved North Carolina
Solid Waste Permit Modification Application (CDM Smith, September 2018).
3.9 Ability to Meet the Corrective Action Measure Objectives
This remedy is protective of human health and the environment due to the institutional controls
already in place and the fact that all monitoring wells will continue to be monitored semi-
annually. Conditions are favorable for natural attenuation and will be supplemented in the area of
MW-5R, -34, and -34d with EAB to reduce contaminant concentrations.
EAB will not control the source of VOC contamination but should prevent the migration of
contamination beyond the landfill perimeter. The existing landfill cap reduces the amount of
leachate generated and the gas recovery system decreases the rate of plume migration and
reduces the amount of VOCs in the waste.
Smith 3-7

Section 4
Evaluation of Effectiveness and Report Submittals
4.1 Physical and Chemical Changes in Aquifer Conditions
EAB injection into the aquifer should not produce any physical or chemical changes in aquifer
conditions.
4.2 Physical and Chemical Changes in Plume Characteristics
EAB should serve to eliminate the chlorinated solvent plume downgradient of the system by
creating a biobarrier that treats groundwater as it passes through the barrier.
4.3 Refining the Site Conceptual Model
The Site conceptual model will be refined as necessary based on the quarterly and semi-annual
sampling events conducted after installation of the EAB.
4.4 Post -Injection Monitoring
Required semi-annual monitoring will continue for all wells at the Site. Additional monitoring will
be completed to assess the EAB performance by quarterly sampling of monitoring wells MW-SR,
-34, and -34d and will commence two months after the EVO injection. Following the fourth
quarterly post -injection sampling event, sampling will return to semi-annually. During each
quarterly post -injection sampling event, the following analyses will be performed for MW-5R, -34,
and -34d:
In Situ
Measurements
HACH Analyses
Laboratory Analyses
ORP
Nitrate
Dissolved Gasses (i.e. ethane, ethene, and methane)
DO
Sulfate
COD
Turbidity
Ferrous Iron
VOCs
Total Iron
Sodium
Carbon Dioxide
Total Dissolved Solids
Alkalinity
Metabolic Acids (i.e. acetic acid, butyric acid, lactic
acid, propionic acid, and pyruvic acid)
Additionally, groundwater samples will be collected from one injection well and MW-5R and will
be analyzed for VOCs and DHC bacteria one month after sodium lactate injection, prior to the EVO
injection.
4.4 Report Submittals
Following completion of the sodium lactate and EVO injection and collection of the fourth
quarterly sampling to monitor the injection, CDM Smith will prepare an injection report for the
SWS and Wake County. The report will discuss the injection implementation, sampling results,
and a determination if additional bioaugmentation is necessary.
Smith 4-1

Section 5
Contingency Plan
If the approved CAP Addendum does not appear to be effectively reducing the groundwater
contamination concentrations at the Site, then the contingency plan will need to be implemented.
Increasing concentration of VOCs in monitoring wells MW-SR, -34, and -34d will trigger initiation
of the contingency plan.
The contingency plan for the Site will consist of the existing institutional controls, gas recovery
and landfill cap, the air sparging system, and bioaugmentation. If it is determined that the EAB is
not effectively remediating VOC in groundwater, bioaugmentation will be used. Wake County will
submit an amendment to the CAP Addendum to the SWS within 90 days that will include a
detailed work plan of the bioaugmentation.
Smith 5-1

Section 6
Schedule and Maintenance
6.1 Timeline
The installation of the EAB system and the sodium lactate injection are anticipated to occur in the
first half of the Fiscal Year 2020, following the approval of the CAP Addendum by the SWS. The
second injection of EVO is anticipated to occur in the second half of the Fiscal Year 2020.
Quarterly sampling events will commence 2 months after the EVO injection event is completed.
The injection report will be submitted 90 days after the fourth post -injection event sampling.
Anticipated completion dates are as follows:
Fiscal Year Task
Injection well installation
pH buffering verification
System installation and startup
2020 EAB injection #1 (sodium lactate)
Pre-EVO injection sampling
EAB injection #2 (EVO)
Quarterly sampling event #1*
Quarterly sampling event #2
Quarterly sampling event #3*
2021 Quarterly sampling event #4
Anticipated Completion Date
August 2019
September 2019
October 2019
October 2019
November 2019
March 2020
May 2020
July 2020
September/October 2020
December 2020
Reporting March 2021
* Quarterly sampling events #1 and #3 will be completed as part of the routine semi-annual monitoring program.
6.2 Operation and Maintenance
EAB is assumed to provide a carbon source for three to five years following injection. Additional
injections as needed will be completed under separate amendments to maintain treatment.
6.3 Safeguard Measures and Site Security
Site access controls including fences and locking gates limit unauthorized people from being on
the premises. All injection wells will have above -grade protective locking well head covers. An
approved health and safety plan, as shown in Appendix A, will be following during remedy
implementation.
6.4 Modifications to the Approved Corrective Action Plan
Addendum
As stated in the SWS guidelines, any requests for modifications of the approved CAP Addendum
and the implementation schedule must be submitted in writing to the SWS. Modifications must be
approved by the SWS.
Smith 6-1

Section 7
Completion of Corrective Action
As conditions at the Site appear to be favorable for EAB, it is anticipated that a continued decline
in contaminant trends will be seen over time. The MNA sampling will continue, in accordance
with SWS rule .1637, until concentrations of the contaminants of concern, or any additional VOCs,
are below their respective NC 2L Standards in the downgradient compliance wells and the
bedrock wells in the MW-SR, -34, and -34d area.
It is anticipated that EAB will be effective at decreasing the VOC concentrations below the NC 2L
Standards within 2 to 5 years. After 4 semi-annual sampling events with VOC concentrations
between the NC 2L Standards, Wake County will consider the corrective action complete and will
submit documentation to that affect. The detection monitoring program will be implemented
immediately after SWS approval of the termination of the corrective action program.
Smith 7-1

Table 1-1
Monitoring Well Construction Summary and Groundwater Elevations
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
Depth Depths
Facility Permit Monitoring Completion Screened Total Number Well Code Date Lattitude Longitude Lithology (feet below Screen Filter Seal Diameter TOC Depth to Groundwater
I I I TOC) Casing I In terval Interval Interval (inches) Eleva Groundwater Elevation
9209-MSWLF-1984 MW-5R 1/30/2004 35.91192 78.57159 Regolith 27.5 10.0-25.0 8.0-25.0 6.0-8.0 2 225.28 13.85 211.43
9209-MSWLF-1984
MW-6
March-94
35.91423
78.57122
Regolith
22.0
10.0-20.0
8.0-20.0
6.0-8.0
2
219.80
11.89
207.91
9209-MSWLF-1984
MW-6d
5/1/2001
35.91423
78.57122
Bedrock
65.0
0-45.0
52.0-62.0
50.0-62.0
48.0-50.0
2
218.61
12.49
206.12
9209-MSWLF-1984
MW-7
March-94
35.91098
78.57436
Regolith
21.5
--
9.0-19.0
7.0-19.0
5.0-7.0
2
234.15
12.03
222.12
9209-MSWLF-1984
MW-8
March-94
35.91078
78.57266
Regolith
21.5
--
9.0-19.0
7.0-19.0
5.0-7.0
2
226.38
11.24
215.14
9209-MSWLF-1984
MW-8d
5/3/2001
35.91078
78.57266
Bedrock
45.0
0-30.0
37.0-42.0
35.0-42.0
29.0-35.0
2
226.16
12.08
214.08
9209-MSWLF-1984
MW-9
March-94
35.91484
78.57273
Regolith
44.0
32.0-42.0
30.0-42.0
28.0-30.0
2
1 242.69
29.54
213.15
9209-MSWLF-1984
MW-10
4/1/1998
35.91499
78.57494
Bedrock
55.5
43.0-53.0
41.0-53.0
39.0-41.0
2
274.76
42.37
232.39
9209-MSWLF-1984
MW-10d
5/1/2001
35.91499
78.57494
Bedrock
93.0
80.0-90.0
78.0-92.0
75.0-78.0
2
274.54
46.84
227.70
9209-MSWLF-1984
MW-11
Oct 1995
35.90574
78.58251
Regolith
57
39.0 - 54.0
37.0-54.0
35.0-37.0
2
343.63
42.99
300.64
9209-MSWLF-1984
MW-11d
Oct1995
35.90578
78.58248
Bedrock
72
64.0-69.0
62.0-69.0
60.0-62.0
2
343.27
43.17
300.10
9209-MSWLF-1984
MW-22
June-97
35.91596
78.57453
Regolith
39.0
27.0-37.0
25.0-37.0
23.0-25.0
2
254.62
33.63
220.99
9209-MSWLF-1984
MW-23
June-97
35.91373
78.57540
Regolith
50.0
38.0-48.0
36.0-48.0
34.0-36.0
2
274.83
44.82
230.01
9209-MSWLF-1984
MW-23d
4/27/1998
35.91373
78.57540
Bedrock
91.0
0-43.0
78.0-88.0
76.0-88.0
74.0-76.0
2
274.89
44.96
229.93
9209-MSWLF-1984
MW-24
June-97
35.91232
78.57546
Regolith
47.5
--
35.0-45.0
33.0-45.0
31.0-33.0
2
266.64
44.65
221.99
9209-MSWLF-1984
MW-28
4/9/1998
35.91644
78.57439
Regolith
30.0
--
20.0-30.0
18.0-30.0
16.0-18.0
2
237.89
17.34
220.55
9209-MSWLF-1984
MW-28d
4/22/1998
35.91644
78.57439
Bedrock
51.0
0-28.0
41.0-51.0
39.0-51.0
37.0-39.0
2
238.44
17.35
221.09
9209-MSWLF-1984
MW-29d
4/22/1998
35.91472
78.57572
Bedrock
52.0
0-40.5
47.0-52.0
45.0-52.0
43.0-45.0
2
275.06
41.27
233.79
9209-MSWLF-1984
MW-30
4/14/1998
35.91374
78.57596
Regolith
55.0
--
40.0-55.0
38.0-55.0
36.0-38.0
2
282.32
50.48
231.84
9209-MSWLF-1984
MW-31
4/2/1998
35.91231
78.57595
Regolith
35.5
--
25.5-35.5
23.0-35.5
21.0-23.0
2
261.67
31.41
230.26
9209-MSWLF-1984
MW-31d
4/23/1998
35.91231
78.57595
Bedrock
66.0
0-51.0
56.0-66.0
54.0-66.0
52.0-54.0
2
260.92
30.97
229.95
9209-MSWLF-1984
MW-32
4/3/1998
35.91142
78.57564
Regolith
26.0
--
13.0-23.0
11.0-23.0
9.0-11.0
2
242.99
14.69
228.30
9209-MSWLF-1984
TB-1a
4/7/1998
35.91188
78.57595
Regolith
30.0
--
20.0-30.0
17.5-30.0
14.0-17.5
2
255.05
26.88
228.17
9209-MSWLF-1984
TB-1a deep
5/7/2001
35.91188
78.57595
Bedrock
62.0
0-23.0
52.0-62.0
50.0-62.0
47.0-50.0
2
256.01
1 29.22
226.79
9209-MSWLF-1984
MW-33
7/22/1998
35.91077
78.57169
Regolith
28.0
--
10.0-25.0
8.0-25.0
6.0-8.0
2
222.01
10.44
211.57
9209-MSWLF-1984
MW-34
7/23/1998
35.91192
78.57116
Regolith
28.0
--
15.0-25.0
13.0-25.0
11.013.0
2
221.96
11.61
210.35
9209-MSWLF-1984
MW-34d
7/23/1998
35.91192
78.57116
Bedrock
58.0
0-38.0
45.0-55.0
43.0-55.0
41.0-43.0
2
222.16
12.12
210.04
9209-MSWLF-1984
MW-35
7/23/1998
35.91322
78.57052
Regolith
28.0
--
10.0-25.0
8.0-25.0
6.0-8.0
2
223.48
15.11
208.37
9209-MSWLF-1984
MW-36
11/25/2008
35.91491
78.57193
Regolith
40.0
--
25.0-40.0
23.0-40.0
21.0-23.0
2
237.40
26.20
211.20
9209-MSWLF-1984
MW-36cl
1 11/25/2008
35.91491
78.57193
Bedrock
55.0
0-45.0
50.0-55.0
48.0-55.0
45.0-48.0
2
1 237.68
26.48
211.20
Notes:
1. TOC - Top of Casing
2. bgs - Below Ground Surface
3. Latitude and Longitude Coordinates - World Geodetic System 1983
Smith Page 1 of 1 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-11
1-Nov-11
80.7J
1.91
6.33113
2.14JB
3.61J
19.6
MW-11
25-Apr-12
65.3.1
2.37J
3.23J
12.1
MW-11
23-Oct-12
80.6J
1.421
3.66J
5.32J
19.7
MW-11
17-Apr-13
901
0.2J
2J
2.1
8J
1J
11
91
20B
MW-11
16-Oct-13
100
0.1J
0.2J
2J
1J
4J
0.51
0.91
5J
15B
MW-11
16-Apr-14
170
0.5J
0.2J
4J
6.1
18
1
1
0.081
40
50B
MW-11
12-Nov-14
901
0.2J
0.2J
2J
2.1
8J
1J
11
0.051
7J
24
MW-11
30-Apr-15
100
0.2J
2J
3.1
101
11
2J
0.061
12J
27
MW-11
15-Oct-15
110
0.3J
0.1J
1
3.1
11
11
0.041
2J
0.051
13JB
27
MW-11
21-Apr-16
0.5J
130
0.3J
1
4.1
16
2J
2J
0.1JB
18J
32
MW-11
1-Sep-16
90J
0.28.1
0.541
2.4.1
2.6.1
8.3J
1.3J
1.6J
111
20
MW-11
20-Apr-17
61J
1.2J
1.5J
11
MW-11
22-Sep-17
45J
2.4.1
1.8J
3.7J
6.31
MW-11
13-Apr-18
61J
2.3.1
2.0J
0.27J
12
MW-11
25-Oct-18
71J
2.2.1
3.9J
0.50J
5.1J
66
MW-11 (dissolved)
25-Oct-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-11
26-Feb-19
57J
2.0J
1.4J
10
MW-11
25-Apr-19
120
0.30J
3.8.1
3.3J
20
2.2J
1.8J
17J
28
MW-11 (dissolved)
25-Apr-19
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-11d
2-Nov-11
45.5.1
2.18.1
4.14JB
2.45J
5.861
MW-11d
26-Apr-12
0.2471
44.2.1
3.04J
9.68JB
3.31J
2.05J
4.621
MW-11d
24-Oct-12
43.7.1
0.3751
2.40J
2.53J
5.101
MW-11d
18-Apr-13
0.4J
50J
0.11
216
0.21
11
0.6J
4.113
MW-11d
17-Oct-13
0.61
0.61
50J
0.31
11
0.2J
11
0.02J
0.6J
2J
2.113
MW-11d
17-Apr-14
300
2.1
0.2J
15
13
56
11
91
0.2J
99
88
MW-11d
13-Nov-14
150
0.7J
0.1J
51
4J
18
4J
1
0.07J
37
35
MW-11d
29-Apr-15
0.6J
0.51
60J
0.1J
0.11
2J
0.6J
1
0.6J
0.91
5J
8.1
MW-11d
15-Oct-15
0.4J
901
0.3.1
0.11
1
2J
91
2J
0.05J
2J
14JB
16
MW-11d
21-Apr-16
0.31
60J
2J
03.1
4J
0.5J
2J
12
MW-11d
1-Sep-16
0.436J
45J
0.076J
1.2.1
2.1J
0.25J
0.75J
2.7J
9.2JB
MW-11d
20-Apr-17
48J
2.2.1
2.2J
2.2J
5.01
MW-11d
22-Sep-17
45J
2.8.1
1.6J
3.3J
5.11
MW-11d
12-Apr-18
43J
5.8.1
2.8J
4.4.1
MW-11d
23-Oct-18
46J
25
13J
4.2.1
MW-11d
25-Feb-19
46J
7.0J
3.4J
3.6.1
MW-11d (dup)
25-Feb-19
45J
9.9.1
4.9J
4.0.1
MW-11d
25-Apr-19
46J
5.0J
2.2J
2.81
MW-5R
31-Oct-11
123
3.28J
2.17.1
5.83.113
1.13J
0.152.1
8.331
MW-5R
24-Apr-12
0.411J
97.3.1
2.79.1
2.47J
0.170J
4.28.1
MW-5R
22-Oct-12
99.3.1
1.82.1
3.61J
0.114.1
23.9
MW-5R
17-Apr-13
80J
0.08J
2J
0.3.1
1
0.1J
5.113
MW-5R
16-Oct-13
90J
0.05J
11
0.5.1
0.4J
1
0.1J
5.113
MW-5R
16-Apr-14
801
0.3.1
0.3.1
0.2J
0.5J
1J
0.2J
2J
5.113
MW-5R
12-Nov-14
801
2J
0.2J
2J
0.3J
6.113
MW-5R
30-Apr-15
70J
0.1J
0.8.1
0.1J
11
0.1J
4.1
MW-5R
15-Oct-15
110
0.2J
7J
0.8J
2J
0.6J
0.04J
4J
0.1J
6.1
MW-5R
21-Apr-16
60J
0.07J
11
0.2J
0.4J
11
0.1JB
2.1
MW-5R
14-Sep-16
79J
0.063J
1.71
0.45J6
0.046JB
2.4J
0.080J
1.1J
5.3JB
MW-5R
20-Apr-17
71J
1.5J
MW-5R
20-Sep-17
430
13
1.7J
1.4J
5.8.1
MW-5R
11-Apr-18
76J
1.4J
1.5J
2.6.1
MW-5R
24-Oct-18
84J
2.1J
3.3.1
MW-5R
22-Apr-19
68J
0.23J
C Mti1 Page 1 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-6
1-Nov-11
0.229J
3.98.1
454
6.351
65.7
4.04JB
18.2J13
2.55J
4.11J
5.36J
MW-6
24-Apr-12
0.244J
182
3.491
54.9
8.45J
2.18.1
0.134J
117
MW-6
22-Oct-12
258
0.148J
1.591
80.4
15.1J
MW-6
17-Apr-13
100J
0.051
1.6
35
4J
0.17J
6J
0.3J
9.113
MW-6
16-Oct-13
90J
0.041
0.3J
34
2J
0.02J
5J
2.1
0.2J
3J
5.113
MW-6 (dup)
16-Oct-13
901
0.2J
0.61
35
2J
0.04J
6J
2.1
0.2J
3J
MW-6
16-Apr-14
0.2J
60J
0.101
0.8J
11
18
1
0.21
4J
0.3J
2J
8.113
MW-6 (dup)
16-Apr-14
60J
0.071
0.7J
11
18
2J
0.21
4J
OX
3J
8.113
MW-6
12-Nov-14
0.8J
310
49
11
0.02J
15J
2.1
0.1J
2.113
MW-6
30-Apr-15
70J
0.061
0.1J
25
11
0.08J
4J
0.1J
3.1
MW-6
14-Oct-15
230
0.2J
32
4J
0.03J
13J
2.1
0.3J
MW-6
20-Apr-16
70J
0.04J
8J
0.51
0.03J
1
1.1
0.08J
MW-6 (dup)
20-Apr-16
70J
0.31
7J
0.6J
0.03J
1
1.1
0.07J
MW-6
14-Sep-16
0.19J6
0.29J
210
0.131
19
2.1JB
0.032JB
9.3J
1.1J
0.084J
1.2.1
6.0113
MW-6
20-Apr-17
120
2.5J
8.3J
0.98J
0.40
4.2J
MW-6 (dup)
20-Apr-17
130
2.6J
8.2J
1.OJ
0.41
4.8J
21
MW-6
21-Sep-17
160
5.3J
2.2J
7.6J
MW-6
12-Apr-18
130
0.14J
7.9J
4.6J
MW-6
24-Oct-18
240
0.13J
1.31
18
1.51
6.9J
MW-6
22-Apr-19
120
0.17.1
0.13J
19
0.171
4.5J
MW-6d
2-Nov-11
2.63J
100
5.421
1.26J
6.46.113
4.68J
3.98J
13.1
MW-6d
26-Apr-12
1.591
72J
5.681
7.24JB
2.37J
2.61J
4J
6.97J
MW-6d (dup)
26-Apr-12
1.22J
66J
5.531
6.45.113
2.10J
2.20J
3.78J
5.88.1
MW-6d
23-Oct-12
1.21J
2.84.1
71.1.1
0.407J
4.831
2.83J
2.11J
3.591
6.02J
MW-6d
18-Apr-13
3.1J
80J
0.1J
0.5.1
4J
0.9.1
1
0.4J
2J
8.113
MW-6d (dup)
18-Apr-13
2.8J
70J
0.091
0.4J
4J
0.8J
1
0.4J
2J
6.113
MW-6d
17-Oct-13
6.9
80J
0.1J
0.5.1
4J
1J
4J
0.6J
0.03J
1
3.1
7.113
MW-6d
17-Apr-14
1.2J
60J
0.11
0.1J
4J
1.0J
2J
0.3J
2J
6.1
7.113
MW-6d
12-Nov-14
1.2J
60J
0.1J
0.2J
1
11
2J
0.3J
2J
4.113
MW-6d
30-Apr-15
1.7J
0.6.1
50J
0.081
0.1J
4J
0.9.1
2J
0.2J
2J
3.1
4.1
MW-6d (dup)
30-Apr-15
2.1J
80J
0.051
0.2J
4J
0.9.1
2J
0.3J
0.05J
2J
3.1
6.113
MW-6d
15-Oct-15
1.1J
60J
0.1J
0.2J
4J
0.6J
2J
0.4J
0.04J
1
2.113
6.1
MW-6d
20-Apr-16
0.4J
50J
0.071
0.1J
4J
0.6J
2J
1
4.1
MW-6d
12-Sep-16
1.0J
65J
0.21.1
4.41
0.85J
6.6JB
1.7J
2.4J
0.34J
4.71
15
MW-6d
20-Apr-17
51J
2.61
2.4J
1.6J
2.61
9.1J
MW-6d
22-Sep-17
0.66J
33J
4.21
3.1J
4.11
6.3.1
MW-6d
13-Apr-18
1.0J
41J
3.81
1.4J
7.6.1
MW-6d
24-Oct-18
31J
7.91
2.4J
3.51
MW-6d
23-Apr-19
57J
0.151
8.21
5.3J
0.51J
2.9J
8.21
6.5J
MW-7
2-Nov-11
67.11
0.38J
14.9
31.6
21.26
13.4J
1.17J
3.27.1
9.741
44.8
MW-7
26-Apr-12
50.31
0.805J
13.3
27.1
10.76
4.04J
10.91
3.63.1
7.241
13.9
MW-7
22-Oct-12
80.71
29.6
30.8
37.4
6.69J
11.5J
2.02J
0.152.1
24.21
24.1
MW-7
16-Apr-13
801
0.51
0.6J
35
27
61
91
0.18.1
13J
2.1
0.2J
24J
25B
MW-7
16-Oct-13
60J
0.11
0.6J
51
37
11
11
0.04J
12J
3.1
12J
11B
MW-7
16-Apr-14
50J
0.21
1.1
10J
46
19
3J
0.04J
17J
3.1
0.09J
23J
40B
MW-7
11-Nov-14
0.51
70J
0.41
0.7J
23
26
45
7J
0.28
13J
2.1
0.2J
5.1
22
MW-7
30-Apr-15
60J
0.11
0.91
51
48
11
2J
0.04J
17J
0.08J
33
MW-7
14-Oct-15
40J
0.11
0.4J
7J
30
10
2J
0.02J
10J
1.1
0.05J
31
MW-7
20-Apr-16
40J
0.061
1.0
2J
52
7J
2J
0.03J
17J
2.1
11
MW-7
13-Sep-16
0.24J
44J
1.6
1.41
41
5.5JB
1.1J
12J
4.OJ
13
MW-7
18-Apr-17
34J
0.131
0.83J
6.11
31
30
16
0.037J
9.2J
8.1J
7.4J
MW-7
18-Sep-17
0.52J
27J
23
1.11
6.8J
MW-7
11-Apr-18
41J
1.5
3.71
32
7.6J
1.11
111
5.7J
29
MW-7 (dissolved)
11-Apr-18
NA
NA
NA
NA
NA
NA
31
NA
NA
NA
NA
NA
NA
NA
NA
MW-7
25-Oct-18
52J
1.3
3.31
34
22
8.6J
10J
8.6J
30
MW-7 (dissolved)
25-Oct-18
NA
NA
NA
NA
NA
NA
37
NA
NA
NA
NA
NA
NA
NA
NA
MW-7
24-Apr-19
35J
1
1 17
1
1
1
1 6.4J
12
C Mti1 Page 2 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-8
MW-8
MW-8
MW-8
MW-8
MW-8
M W-8
MW-8
MW-8
MW-8
MW-8
MW-8
MW-8
M W-8
MW-8
MW-8
MW-8 (dup)
31-Oct-11
24-Apr-12
22-Oct-12
17-Apr-13
16-Oct-13
16-Apr-14
12-Nov-14
30-Apr-15
15-Oct-15
21-Apr-16
14-Sep-16
20-Apr-17
18-Sep-17
12-Apr-18
24-Oct-18
22-Apr-19
22-Apr-19
0.9371
0.8J
56.51
41.31
41.81
50J
50J
50J
50J
80J
80J
70J
65J
61J
73J
65J
71J
110
110
0.1461
0.081
0.11
0.071
0.11
0.081
0.4041
0.2J
0.11
0.11
0.131
0.14J
7.421
1.211
1.201
2J
2J
11
0.61
4J
2J
0.81
1.3J
1J
2J
11
0.4J
2J
2J
2J
1.9J
0.851
4.2J
2.7J
9.4J
9.5J
4.53JB
2J
0.1
0.2716
0.2J
0.03J
0.04J
0.02J
0.11J
4.95113
3.19J
2.76J
4J
4J
5J
5J
7J
6J
6J
6.6J
4.9J
4.6J
5.2J
5.01
8.2J
8.11
0.05JB
5.18J
1.83J
1.97J
5J
2.9J
1.81
3.OJ
2.6J
2.5J
7.321
515
916
107
5.113
14
61
61
8.5JB
4.71
5.71
4.51
7.01
120
5.61
MW-8d
2-Nov-11
0.7241
25.01
1.05
5.02J
5.02JB
2.00J
4.22J
7.281
MW-8d
26-Apr-12
1.63J
34.51
11B
2.82J
4.15J
7.521
MW-8d
24-Oct-12
1.59J
30.61
0.4831
5.461
3.21J
4.79J
9.991
MW-8d
18-Apr-13
0.61
20J
4J
0.31
11
0.2J
11
0.061
216
MW-8d
17-Oct-13
40J
0.21
0.31
6J
1J
6J
iJ
0.03J
2J
7J
MW-8d
17-Apr-14
0.91
20J
0.11
4J
0.41
2J
0.1
0.8J
7J
5J13
MW-8d
12-Nov-14
1.OJ
20J
4J
0.31
2J
0.1
0.91
216
MW-8d
30-Apr-15
2.5J
0.6.1
20J
0.11
1
0.4J
11
0.4J
11
2J
41
MW-8d
15-Oct-15
0.21
20J
1
0.061
0.051
0.5J
1JB
MW-8d
21-Apr-16
20J
3J
0.5J
MW-8d
14-Sep-16
16J
1.71
0.6016
0.047JB
0.72J
4.8J
2.016
MW-8d
20-Apr-17
191
2.61
4.1
4.OJ
3.11
MW-8d
18-Sep-17
16J
2.91
3.3J
MW-8d (dup)
18-Sep-17
17J
3.21
2.8J
MW-8d
12-Apr-18
17J
3.51
MW-8d
23-Oct-18
18J
6.51
2.2J
4.4J
MW-8d (dup)
23-Oct-18
17J
6.31
2.OJ
4.5J
MW-8d
23-Apr-19
17J
4.OJ
3.9J
MW-9
i-Nov-11
209
0.4251
14.9
6.79.1
8.8316
6.37J
4.11JB
0.982J
4.521
0.1641
6.88J
69.2
MW-9 (dup)
i-Nov-11
191
0.2561
10.4
5.81.1
5.3216
3.99J
3.0816
0.874J
3.661
0.1271
3.26J
50.1
MW-9
25-Apr-12
176
0.2201
5.68J
4.811
2.721
13.5
MW-9
23-Oct-12
5.17.1
210
0.7111
4.13
19.7
6.961
17.1
27.2
3.41J
7.49J
0.521J
30.2
141
MW-9
17-Apr-13
160
0.316
2
3J
4.1
4J
4J
4J
0.3J
81
27B
MW-9
16-Oct-13
120
0.21
1.1
2J
0.41
2J
iJ
2J
0.21
6J
16B
MW-9
16-Apr-14
130
0.41
1.3
4J
0.81
5J
4J
3J
0.31
16J
36B
MW-9
12-Nov-14
120
0.31
0.4J
4J
0.61
4J
3J
2J
0.21
17
MW-9 (dup)
12-Nov-14
140
0.51
0.4J
6J
1J
6J
6J
2J
0.31
4J
28
MW-9
29-Apr-15
0.7J
901
0.11
0.31
2J
0.11
11
0.81
0.81
0.21
31
8J
MW-9
15-Oct-15
160
0.71
0.21
91
11
6J
7J
0.071
11
0.3J
11JB
31
MW-9
20-Apr-16
150
0.21
2J
0.21
11
0.7J
0.91
0.11
3J
MW-9
13-Sep-16
100
0.151
0.121
1.71
1.316
1.OJ
1.2J
0.161
11JB
9.4J
MW-9
19-Apr-17
130
2.11
1.OJ
0.52J
7.4J
4.6J
MW-9
21-Sep-17
160
1.4
0.371
13
1.91
11
15
2.1J
0.40J
34
49
MW-9 (dissolved)
21-Sep-17
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
111
NA
MW-9
11-Apr-18
130
0.161
3.21
0.61J
3.OJ
0.20J
5.5J
4.5J
MW-9 (dissolved)
11-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
5.6J
NA
MW-9
25-Oct-18
891
2.11
0.151
111
MW-9
25-Aor-19
150
1.1
2.31
0.39J
2.4J
7.1J
6.9J
C Mti1 Page 3 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-10
31-Oct-11
28.1.1
1.72J
1.611
3.56J13
3.00J
1.94J
12.8
MW-10
25-Apr-12
34.7.1
0.320J
0.438J
1.79J
2.041
4.81J
2.64J
0.538
2.25J
21.7
MW-10
23-Oct-12
31.1.1
0.302J
0.965J
2.071
2.51J
2.57J
0.910
2.07J
16.5
MW-10
17-Apr-13
30J
0.3JB
0.4J
0.4J
2.1
2,113
11
0.43
1
0.06J
14B
MW-10
16-Oct-13
30J
0.3.1
0.2J
0.4J
2.1
2J
11
0.29
1
0.05J
4J
9.113
MW-10
16-Apr-14
30J
0.3.1
0.2J
2.1
11
0.5J
0.05J
3J
4J
38B
MW-10
12-Nov-14
30J
0.3.1
2.1
0.03J
1
9.113
MW-10
29-Apr-15
0.2J
40J
0.3.1
0.1J
3.1
2J
11
0.101
5J
0.05J
10
MW-10
14-Oct-15
30J
0.3.1
0.2J
2.1
0.8J
0.4J
0.08J
1
27
MW-10
20-Apr-16
30J
0.3.1
0.1J
41
0.6J
0.1
0.03J
5J
1.1
0.05J
4.1
MW-10
13-Sep-16
0.47J
31J
0.36.1
0.19.1
3.81
2.OJB
1.2J
0.14J
4.8J
3.6J
280
MW-10
19-Apr-17
27J
0.32.1
2.91
0.93J
0.38J
0.064J
3.4J
17
MW-10
22-Sep-17
17J
0.18.1
1.31
2.2J
0.30J
2.1
2.1J
8.9.1
MW-10
11-Apr-18
20J
0.32.1
0.87.1
1.9.1
2.41
1.1
0.55J
0.27
2.5J
51
MW-10
25-Oct-18
24J
0.16.1
0.72.1
2.31
0.57J
0.39
2.7J
7.4J
77
MW-10 (dissolved)
25-Oct-18
NA
NA
NA
NA
NA
NA
2.61
NA
NA
NA
NA
NA
NA
NA
NA
MW-10
25-Apr-19
25J
1.7.1
2.71
0.4SJ
S.11
2.5.1
MW-10d
2-Nov-11
3.81.1
2.10J
3.18JB
4.14.1
MW-10d
26-Apr-12
0.232J
4.36.1
3.50J
3.47JB
4.57J
MW-10d
24-Oct-12
3.11.1
MW-10d
18-Apr-13
4.113
1.113
0.07J
0.7J
iJ
MW-10d
16-Oct-13
0.3J
3.113
0.2J
11
0.05J
0.7J
0.6J
MW-10d
17-Apr-14
2J
0.4.1
0.6J
4J
3.113
MW-10d
12-Nov-14
1
0.5.1
0.04J
0.4J
MW-10d
30-Apr-15
0.8J
0.5.1
1
0.3.1
0.3.1
0.05J
0.6J
4.1
MW-10d
15-Oct-15
0.5J
5J
0.07J
0.8.1
0.08J
11
0.2J
0.07J
0.6J
5.1
MW-10d
21-Apr-16
0.3J
5J
0.2.1
2J
1J
2J
6.1
MW-10d
14-Sep-16
2.5.1
0.67.113
0.15J
3.3J
5.5JB
MW-10d
19-Apr-17
2.5.1
0.14J
0.70J
MW-10d
18-Sep-17
4.1J
0.35.1
1.4.1
3.1J
0.32J
6.9.1
MW-10d
11-Apr-18
0.60J
3.7.1
0.60J
1.8.1
2.1J
0.34J
14
MW-10d
25-Oct-18
2.5.1
MW-10d
25-Apr-19
2.8.1
3.0.1
MW-22
1-Nov-11
41.2.1 7.96 4.25J 46.7 5.241B 17.2.113 2.87.1 3.22J 43.9
MW-22
25-Apr-12
61.5.1 0.224J 4.78 4.77J 63.8 14J 2.56.1 0.162.1 33.1 18.4
MW-22
23-Oct-12
34.7.1 8.27 2.28.1 44.7 16.8J 4.02J 19.2
MW-22
17-Apr-13
70J 0.11 4 0.9J 76 1.113 0.7J 15J 0.06J 12B
MW-22
16-Oct-13
50J 0.1J 3.5 11 25 11 11 101 3J 8.113
MW-22
16-Apr-14
50J 0.1J 2.5 0.91 43 11 11 14J 4J 14B
MW-22
12-Nov-14
40J 0.1J 2.5 1 17 2J 2J 101 9.1
MW-22
30-Apr-15
50J 1.5 0.61 31 0.7J 0.6J 101 9.1
MW-22
15-Oct-15
801 0.7J 3.4 91 29 5J 91 0.05J 13J 4.1 0.2J 14JB 56
MW-22
20-Apr-16
40J 0.071 1.3 18 0.5J 0.1 7J 6.1
MW-22
13-Sep-16
82J 0.821 3.1 12 38 6.9JB 11 14J 3.1J 0.20J 181 47
MW-22
19-Apr-17
45J 0.261 2.8 1.91 18 2.6J 1.6J 6.5J 0.93.1 6.4J 13
M W-22
18-Sep-17
Not Sampled (4)
M W-22
13-Apr-18
Not Sampled (4)
MW-22
23-Oct-18
Not Sampled (4)
MW-22
23-Apr-19
Not Sampled (4)
Smith Page 4 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-23
26-Apr-12
42.71
6.68.1
1.63J
10.413
7.07J
4.20J
12.5J
17.5
MW-23
24-Oct-12
38.91
5.76.1
1.83J
8.02J
4.12J
3.92J
13.3J
18.5
MW-23
18-Apr-13
0.2J
240
1.8
0.1J
30
15
56
30
0.06J
28J
11
106
147
MW-23
16-Oct-13
30J
0.2J
0.1J
1
0.7J
4J
2J
0.02J
2J
5J
616
MW-23
16-Apr-14
50J
0.3.1
0.2J
7J
2J
10
5J
4J
0.1J
16J
25B
MW-23
12-Nov-14
50J
0.4J
7J
2J
12
6J
0.02J
5J
0.11
12J
19
MW-23
30-Apr-15
0.4J
50J
0.3.1
7J
2J
13
6J
0.03J
6J
0.11
15J
26
MW-23
15-Oct-15
110
1.1
20
7J
34
18
0.06J
16J
0.51
39
69
MW-23 (dup)
15-Oct-15
170
1.6
32
11
51
30
0.12J
25J
0.81
60
112
MW-23
20-Apr-16
40J
0.3.1
5J
11
91
5J
4J
0.11
91
21
MW-23
13-Sep-16
54J
0.59.1
0.083J
8.9.1
3.3J
15B
7.7J
6.9J
0.22J
23J
39
MW-23
19-Apr-17
26J
0.19J
3.3.1
4.5J
2.1.1
2.4J
6.5J
7.2.1
MW-23
20-Sep-17
110
1.5
0.14J
19
6.6J
33
17
16J
0.48J
59
67
MW-23 (dissolved)
20-Sep-17
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
3.3J
NA
MW-23
11-Apr-18
85J
0.86.1
0.22.1
12
4.4J
21
11
14J
0.28J
30
44
MW-23 (dissolved)
11-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-23
25-Oct-18
51J
0.261
0.621
9.2.1
3.1J
12
5.6J
8.3J
0.19J
21J
45
MW-23 (dissolved)
25-Oct-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-23
25-Apr-19
42J
0.191
5.6.1
1.8J
8.0J
4.6J
4.2J
13J
30
MW-23 (dissolved)
25-Apr-19
I NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-23d
25-Apr-12
0.754J
35J
0.746.1
4.03J
16.86
3.32J
4.05J
6.65.1
MW-23d
23-Oct-12
0.552J
33.2.1
0.644.1
4.73.1
4.38J
4.48J
8.66.1
MW-23d
18-Apr-13
2.6J
40J
1.5
3.113
0.3J
4J
0.4J
iJ
12B
MW-23d
17-Oct-13
1.7J
40J
0.05J
0.7J
2J
0.3.1
1
0.3J
0.02J
1J
31
3.113
MW-23d
17-Apr-14
1.3J
30J
0.3.1
2J
0.3.1
2J
0.3J
iJ
6J
8.113
MW-23d
13-Nov-14
1.1J
40J
0.2J
2J
0.3.1
2J
0.3J
0.8J
2J
6.1
MW-23d
29-Apr-15
1.6J
40J
0.2J
2J
0.3.1
2J
0.3J
0.91
2J
6.1
MW-23d
15-Oct-15
3.6J
40J
0.04J
0.5.1
1
0.4J
4J
0.6J
0.05J
1J
2JB
13
MW-23d
20-Apr-16
1.31
40J
0.2J
1
0.3.1
2J
0.2J
4J
7.1
MW-23d
13-Sep-16
1.2J
37J
0.23.1
2.3.1
0.26.1
2.5JB
0.48J
2.5J
6.11
13
MW-23d (dup)
13-Sep-16
0.97J
36J
0.22.1
1.9.1
2.2JB
0.36J
2.2J
5.7J
10
MW-23d
19-Apr-17
0.53J
34J
0.24.1
2.0J
4.9J
1.4J
3.7J
6.9.1
MW-23d
21-Sep-17
34J
2.7.1
3.8J
3.5J
5.8.1
MW-23d
10-Apr-18
38J
5.2.1
2.4J
0.32J
1.81
2.6J
3.4.1
MW-23d (dup)
10-Apr-18
36J
4.8.1
2.3J
1.7J
3.1J
MW-23d
23-Oct-18
36J
14
7.0J
4.0J
MW-23d
23-Apr-19
41J
2.2.1
3.9J
MW-24
26-Apr-12
57.6.1
0.281J
7.54.1
7.09J6
9.80J
3.35J
1.82J 0.1901 8.38J
58.7
MW-24
23-Oct-12
35.9.1
2.10J
2.50J
4.01J
0.1201 5.34J
28.3
MW-24
17-Apr-13
120
1.4.1
0.1J
91
2.1
11
17
0.24
5J
0.5J 17J
128
MW-24
16-Oct-13
60J
0.6.1
0.1J
4J
0.91
5J
7J
0.09J
2J
0.2J 81
46
MW-24
16-Apr-14
120
1.1
6J
2.1
91
14
0.17J
4J
0.4J 22J
120
MW-24
12-Nov-14
130
1.5
81
2.1
11
17
0.21
5J
0.6J 14J
117
MW-24
29-Apr-15
801
0.8.1
4J
1.1
7J
91
0.12J
3J
0.3J 101
69
MW-24
14-Oct-15
240
2.5
0.2J
12
4.1
18
29
0.43
7J
0.91 34
182
MW-24
20-Apr-16
170
1.8
101
3J
13
22
0.21
6J
0.7J 23J
140
MW-24
13-Sep-16
34J
0.37.1
0.086J
1.4.1
0.55.1
2.3JB
3.6J
1.5J
0.12.1 7.5J
31
MW-24
19-Apr-17
66J
0.77.1
3.8.1
0.98.1
5.0J
7.9J
0.086J
2.5J
0.24J 9.1J
56
MW-24
20-Sep-17
51J
0.76.1
3.9.1
0.71.1
4.6J
5.8J
2.4J
0.19.1 7.5J
47
MW-24 (dissolved)
20-Sep-17
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA NA 3.6J
NA
MW-24
11-Apr-18
62J
0.75.1
4.8.1
5.0J
7.1J
2.6J
0.22J 6.9J
49
MW-24 (dissolved)
11-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA NA
NA
MW-24
23-Oct-18
Not Sampled
(4)
MW-24
24-Apr-19
Not Sampled
(4)
C Mti1 Page 5 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-28
26-Apr-12
67.71
14.2
3.90J
2.81113
5.18J
5.84.1
0.229.1
20.7J
69.8
MW-28
18-Apr-13
60J
0.3.1
10
3J
1J
1J
4J
0.2J
101
34B
MW-28
17-Apr-14
170
1.5
41
14
Si
7J
0.02J
20J
1.01
53
159
MW-28
30-Apr-15
80J
0.5.1
16
5J
2J
2J
0.02J
7J
0.4J
22J
62
MW-28
21-Apr-16
20J
4.1
0.061
9.1
MW-28
20-Apr-17
29J
0.18.1
3.9.1
0.30J
1.3J
6.1J
11
MW-28
13-Apr-18
55J
0.41.1
11
2.7J
1.3J
5.1J
0.161
15J
22
MW-28 (dissolved)
13-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2.6J
NA
MW-28
25-Apr-19
56J
0.17.1
8.9.1
2.6J
1.2J
4.4J
0.15J
15J
37
MW-28 (dissolved)
25-Apr-19
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-28d
26-Apr-12
1.46J
28.71
10.1
1.34J
13.36
4.99J
9.42J
4.73J
106
MW-28d
18-Apr-13
0.31
916
216
0.11
0.91
0.91
416
MW-28d
17-Apr-14
0.41
1.1
6J
4J
0.4J
3J
1.01
51
6J
10B
MW-28d
30-Apr-15
0.21
101
2J
0.091
0.6J
0.91
71
MW-28d
21-Apr-16
91
2J
0.8J
91
91
MW-28d
20-Apr-17
8.11
1.3.1
0.68J
3.3J
5.91
MW-28d
13-Apr-18
5.81
1.9.1
6.91
MW-28d
25-Apr-19
7.11
2.0J
1.51
1.51
3.3J
9.91
MW-28d (dissolved)
25-Apr-19
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-29d
18-Mar-11
0.3911
3.08J
54.81
9.57.1
16.2
4.09J
4.15J
7.4J
15.5
MW-29d
1-Nov-11
42.71
6.46.1
1.21J
12.46
2.70J
4.25J
17.2
MW-29d
26-Apr-12
0.3171
41.51
6.48.1
8.73JB
3.94J
1.97J
3.72J
23.2
MW-29d
24-Oct-12
38.01
4.87.1
6.36J
2.48J
4.36J
7.641
MW-29d
18-Apr-13
40J
0.08J
4J
0.4J
51
0.3J
11
0.051
316
MW-29d
17-Oct-13
40J
0.1J
4J
0.21
1
11
MW-29d
17-Apr-14
40J
0.08J
1
0.21
1
0.8J
5J
25B
MW-29d
13-Nov-14
40J
0.07J
1
0.51
4J
0.3J
2J
21
MW-29d
29-Apr-15
0.21
0.5J
40J
0.1J
4J
0.31
4J
0.3J
11
13
MW-29d
15-Oct-15
0.21
40J
0.1J
4J
0.31
4J
0.6J
0.04J
1J
81
MW-29d
21-Apr-16
0.6J
40J
4J
0.31
51
0.2J
11
61
MW-29d
12-Sep-16
0.381
39J
2.7.1
3.1JB
0.25J
0.901
4.8J
22
MW-29d
19-Apr-17
36J
2.7.1
1.91
2.3J
13
MW-29d
22-Sep-17
35J
3.9.1
2.8J
5.9J
MW-29d
12-Apr-18
34J
3.7.1
1.3J
5.4J
MW-29d
24-Oct-18
34J
3.2.1
3.3J
2.71
MW-29d
25-Apr-19
38J
3.3.1
MW-30
1-Nov-11
147 0.302J 47.5 8.80J 69.86 3.90J 22.216 3.511 0.1961 44 60.8
MW-30
25-Apr-12
169 0.7731 58 9.94J 73.9 9.17J 22.7J 2.151 0.360J 51.7 54.7
MW-30
23-Oct-12
197 57.5 11.3 80.2 9.44.1 26.3 0.359J 54.4 62.6
MW-30
17-Apr-13
450 2.8 0.11 124 24 155 17 0.041 56 11 146 141
MW-30
16-Oct-13
220 1.4 49 91 63 6.1 0.031 21J 0.3J 50 40
MW-30
16-Apr-14
220 1.4 66 11 78 7.1 0.021 26J 0.51 73 71
MW-30
12-Nov-14
500 3.0 0.21 148 24 169 19 0.07J 59 21 1.11 154 148
MW-30
29-Apr-15
180 1.2 59 91 67 6.1 23J 0.4J 48 53
MW-30
15-Oct-15
0.4J 60J 1.2 0.71 48 11 12 2J 0.051 10J 0.061 63 44
MW-30
21-Apr-16
150 0.81 46 71 54 5J 0.021 18J 0.31B 29 38
MW-30
14-Sep-16
0.1716 50J 0.361 0.0531 8.81 1.61 11B 0.95J 4.5J 111 18B
MW-30
20-Apr-17
79J 0.561 25 3.1J 28 2.2J 8.7J 0.14J 191 22
MW-30
22-Sep-17
Not Sampled (4)
M W-30
12-Apr-18
Not Sampledl4l
MW-30
24-Oct-18
Not Sampled (4)
MW-30
25-Aor-19
Not Samoled (4)
C Mti1 Page 6 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-31
1-Nov-11
84.2J
0.151J
33.3
2.57J
23.91B
7.27J
13.7JB
2.66J
0.129J
26.2
57.9
MW-31
25-Apr-12
33.4J
0.122J
13.1
6.71J
3.56J
5.401
0.904J
9.25.1
33.1
MW-31
23-Oct-12
35.7J
14
6.52J
3.76J
5.09J
9.26.1
53.6
MW-31
17-Apr-13
70J
0.4J
24
11
14
7J
0.03J
8J
0.051
181
29B
MW-31
16-Oct-13
30J
0.11
11
0.4J
5J
2J
5J
5J
13B
MW-31
16-Apr-14
901
0.5J
0.2J
32
2J
18
10
0.07J
8J
0.07J
35
70
MW-31
12-Nov-14
0.5J
110
0.7J
41
2J
26
14
0.08J
11J
0.11
37
29
MW-31
29-Apr-15
50J
0.2J
14
0.6J
7J
4J
0.03J
3J
13J
14
MW-31
14-Oct-15
0.5J
120
0.6J
38
21
24
13
0.111
91
0.08J
37
37
MW-31
21-Apr-16
0.6J
70J
0.5J
30
2J
17
12
0.14J
5J
0.07JB
26
17
MW-31
13-Sep-16
29J
0.23J
13
0.64J
5.61B
3.4J
2.0J
12J
12
MW-31
19-Apr-17
28J
8.3J
3.9J
1.81
2.6J
0.22J
5.2J
12
M W-31
21-Sep-17
Not Sampled(4)
M W-31
12-Apr-18
Not Sampled(4)
M W-31
24-Oct-18
Not Sampled(4)
M W-31
24-Apr-19
Not Sampled(4)
MW-31d
31-Oct-11
1.21.1
21.2J
13.4
34.21B
4.99JB
10.2J
69.6
MW-31d
24-Apr-12
1.681
17.1J
6.79J
26.5
0.944J
7.62J
12.6
MW-31d
22-Oct-12
7.20J
19.3J
8.24J
1.82J
7.99J
43.5
MW-31d
16-Apr-13
0.5J
20J
6J
0.08J
0.8JB
1J
6J
21B
MW-31d
15-Oct-13
0.81
20J
6J
0.06J
11
0.81
5J
16B
MW-31d
15-Apr-14
0.7J
20J
5J
0.091
0.81
0.91
91
24B
MW-31d
11-Nov-14
0.5J
20J
6J
0.08J
0.8J
0.7J
2J
7J
MW-31d
28-Apr-15
1.1J
20J
6J
0.07J
0.9J
0.8J
5J
24
MW-31d
13-Oct-15
1.2J
20J
0.3J
6J
0.05J
1
0.2J
0.04J
1J
4J
30
MW-31d
21-Apr-16
20J
4J
0.7J
0.91
2J
5J
MW-31d
13-Sep-16
0.59J
18J
0.14J
5.3J
1.5JB
1.2J
7.2J
56
MW-31d
19-Apr-17
18J
5.4J
2.6J
6.6J
53
MW-31d
18-Sep-17
191
4.4J
1.0J
7.8J
2.6J
MW-31d
13-Apr-18
0.51J
18J
5.3J
4.6J
25
MW-31d (dissolved)
13-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
4.3J
NA
MW-31d
24-Oct-18
21J
6.6J
0.28J
1.8J
9.91
4.0J
MW-31d
24-Apr-19
21J
4.2J
7.8J
MW-32
1-Nov-11
5.75J
14.21
3.41J
1.47J
10.06
3.39J
2.96.1
27.7
MW-32
25-Apr-12
0.393J
3.37J
15.41
0.261J
1.92J
2.34J
8.49J
1.96J
5.71.1
6.22J
MW-32
23-Oct-12
30J
6.71J
3.30J
27.2
5.04J
11.8.1
13.1
MW-32
17-Apr-13
30J
0.3J
5J
3J
22
0.51
51
91
81B
MW-32
16-Oct-13
70J
0.6J
0.3J
11
6J
50
0.91
101
0.11
32
25
MW-32
16-Apr-14
20J
0.3J
2J
21
81
0.2J
2J
71
10B
MW-32
12-Nov-14
50J
0.5J
11
51
37
0.91
91
0.11
151
18
MW-32
29-Apr-15
0.6J
140
1.6
0.11
27
18
131
1
24J
0.3J
77
58
MW-32
14-Oct-15
170
1.4
0.11
29
18
135
2J
0.04J
25J
0.3J
91
53
MW-32
21-Apr-16
40J
0.5J
6J
51
28
0.51
6J
0.08JB
17J
18
MW-32
13-Sep-16
40J
0.63J
0.20J
8.5J
5.61
27B
0.75J
7.2J
0.0861
18J
19
MW-32
20-Apr-17
11J
0.30J
1.6J
0.90J
5.1J
1.4J
2.7J
3.51
MW-32
22-Sep-17
0.661
14J
0.17J
1.6J
1.1
1.1
4.01
MW-32
13-Apr-18
8.5J
0.30J
1.5J
2.71
MW-32
25-Oct-18
13J
0.26J
3.1J
1.8J
1.6J
2.51
MW-32 (dissolved)
25-Oct-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-32
25-Apr-19
26J
0.33J
0.30J
2.6J
11
9.5J
5.01
4.7.1
27
MW-32 (dissolved)
I 25-Apr-19
I NA
I NA
NA
I NA
NA
I NA
NA
I NA
I NA
NA
NA
I NA
NA
C Mti1 Page 7 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
TB-1a
1-Nov-11
126
5.39
19.1
11.5
99.31B
19.01
40.5
91.8
TB-1a
25-Apr-12
0.269J
190
1.5
29
22
158
7.33J
0.348
27.9J
0.186J
61.3
89.4
TB-1a
23-Oct-12
85.4J
0.584J
11.3
14.8
59.6
2.35J
13.1
25
48.2
TB-1a
17-Apr-13
40J
0.06J
0.3J
5J
91
24
0.91
0.11
6J
91
11B
TB-1a
16-Oct-13
60J
0.08J
0.3J
6J
10
35
11
0.12J
91
14J
14B
TB-1a
16-Apr-14
101
1.2
0.7J
51
1
0.1
0.13J
3J
5J
16B
TB-1a
12-Nov-14
80J
0.2J
2.7
101
91
54
2J
0.34
12J
0.08J
191
41
TB-1a
29-Apr-15
0.6J
30J
0.06J
1.9
4J
51
18
11
0.22
6J
6J
17
TB-1a
15-Oct-15
70J
0.1J
2.5
8J
11
40
2J
0.22
13J
17JB
45
TB-1a
21-Apr-16
501
0.7J
6J
6J
33
11
0.22
7J
0.06JB
6J
18
TB-1a
14-Sep-16
0.17JB
99J
0.23J
1.7
12
11
72B
3.5J
0.72B
15J
0.111
29
49B
TB-1a
20-Apr-17
17J
0.37J
1.0J
3.6J
0.050J
1.9J
5.1.1
5.5J
TB-1a
22-Sep-17
Not Sampled(4)
TB-1a
12-Apr-18
Not Sampled(4)
TB-1a
24-Oct-18
Not Sampled(4)
TB-1a
24-Apr-19
Not Sampled(4)
TB -la deep
31-Oct-11
0.865J
14.2J
22.9
4.52JB
6.60JB
1.13J
7.66J
13.2
TB -la deep
24-Apr-12
0.928J
15.51
15
11.5
3.87J
1.23J
6.58.1
8.41J
TB -la deep
23-Oct-12
18.0J
14.9
6.85J
8.29J
6.51.1
10.4
TB -la deep
16-Apr-13
2.3J
20J
0.2J
12
0.91
81
0.51
51
2J
16B
TB -la deep
15-Oct-13
2.2J
20J
0.11
6J
11
6J
51
4J
3J
9JB
TB -la deep
15-Apr-14
2.1J
20J
0.11
7J
0.81
51
0.4J
1
81
17B
TB -la deep
11-Nov-14
2.9J
30J
0.11
7J
11
51
O.51
4J
18
TB-1a deep
28-Apr-15
2.4J
30J
0.11
7J
0.8J
4J
0.4J
51
2J
12
TB-1a deep
14-Oct-15
10J
4J
0.04J
1J
TB-1a deep
20-Apr-16
0.4J
20J
4J
0.7J
2J
0.2J
3J
6J
TB-1a deep
13-Sep-16
0.66J
22J
0.070J
3.1J
0.46J
1.7JB
0.26J
3.2J
6.4J
12
TB-1a deep
19-Apr-17
0.74J
25J
3.2J
3.0J
3.1
3.9J
13
TB-1a deep
22-Sep-17
0.76J
151
3.4J
3.4J
6.8J
TB-1a deep
13-Apr-18
2.1J
13J
3.1J
1.4J
0.28J
13
TB-1a deep
24-Oct-18
13J
5.2J
1.6J
6.5.1
TB-1a deep
24-Apr-19
13J
1
1 29
1
1
1 151
3.9.1
MW-33
25-Apr-12
112
0.208J
44.4
15.1
37
6.44J
20.2J
0.917J
72.1
102
MW-33
17-Apr-13
70J
0.3J
17
5J
13
2J
7J
34
33
MW-33
15-Apr-14
40J
51
0.6J
1J
2J
81
91B
MW-33
29-Apr-15
50J
0.07J
7J
11
3J
0.4J
1
81
15
MW-33
21-Apr-16
0.5J
1001
0.1J
17
4J
12
2J
7J
21J
35
MW-33
20-Apr-17
29J
5.11
1.5J
5.9.1
7.4J
MW-33
13-Apr-18
28J
5.3J
3.3.1
6.3J
MW-33
24-Apr-19
59J
4.3J
1.6J
1.7J
4.0.1
4.8J
MW-34
26-Apr-12
0.261J
184
1.27
25.4
4.771
23.86
8.1
0.255
13.2J
37.4
53.7
MW-34
17-Apr-13
560
5
0.3J
75
17
90
21
0.45
49J
0.3J
239
282
MW-34
15-Apr-14
110
0.31
0.2J
3J
11
0.81
0.25
2J
3.1
16B
MW-34
29-Apr-15
220
1.5
0.2J
24
51
24
5J
0.33
15J
0.11
47
76
MW-34
21-Apr-16
150
0.51
91
21
5J
0.8J
0.17J
5J
0.08JB
2.1
32
MW-34
20-Apr-17
84J
0.291
4.4J
1.4J
0.25
2.0J
1.5.1
13
MW-34
13-Apr-18
130
0.631
8.6J
1.81
6.8J
1.2J
1.1
5.2J
7.1.1
21
MW-34 (dissolved)
13-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-34
25-Apr-19
170
0.621
0.21J
14
2.51
10
1.9J
0.30
6.9J
14J
30
MW-34 (dissolved)
I 25-Apr-19
I NA
I NA
NA
NA
NA
NA
I NA
I NA
I NA
I NA
NA
I NA
NA
C Mti1 Page 8 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-34d
MW-34d
MW-34d
MW-34d
MW-34d
MW-34d
MW-34d
MW-34d
MW-34d
16-Mar-11
25-Apr-12
16-Apr-13
15-Apr-14
28-Apr-15
21-Apr-16
20-Apr-17
11-Apr-18
23-Apr-19
0.351J
0.575J
0.6J
0.4J
0.8J
0.51
33.2.1
32.5.1
20J
20J
20J
180
20J
20J
21J
0.1J
0.1J
0.1J
0.8J
0.14J
0.15.1
0.3.1
0.2J
0.3.1
0.1J
9.87.1
8.02J
4J
4J
5J
15
6.4.1
12
6.5.1
0.11
0.091
0.08J
3J
8.59J
5.86,113
1,113
2J
11
12
1
2.06J
2.66J
0.6J
0.5J
0.5J
2J
0.05J
0.191
0.073J
1 0.46
0.7J
0.5J
81
0.946J
1.1
0.209J
0.1JB
1.83J
1.57J
4J
12J
2.OJ
11.2
7.83.1
2.113
11B
6.1
35
3.0.1
MW-35
25-Apr-12
51.31
0.6161
3.96J
2.36J
5.67J
3.10J
11.31
17.8
MW-35
17-Apr-13
60J
0.8.1
0.1J
51
21
7J
2J
4J
16J
12B
MW-35
16-Apr-14
60J
1.01
0.31
6J
31
8J
2J
4J
22J
26B
MW-35
29-Apr-15
70J
1.0
0.1J
7J
41
91
2J
0.02J
51
0.06J
22J
20
MW-35
20-Apr-16
50J
0.71
4J
21
5J
1J
3J
111
12
MW-35
20-Apr-17
38J
0.39.1
2.3.1
6.51
2.4J
5.OJ
3.7J
3.9J
66
MW-35
13-Apr-18
29J
0.281
0.241
1.51
3.31
0.48J
32
MW-35
24-Apr-19
38J
0.41.1
2.1J
1.61
1.6J
0.38J
1.1
3.1J
14
MW-36
1-Nov-11
74.61
12.1
3.63J
14.713
7.15113
14.8J
31.8
MW-36
25-Apr-12
64.7.1
7.90J
2.611
9.44J
4.33J
12.5J
12.1
MW-36
23-Oct-12
216
68.8
18.8
84
8.62J
29.3J
0.420J
91.7
72
MW-36 (dup)
23-Oct-12
73.7.1
11.6
3.491
13.4
6.09J
0.121J
16.8J
18.4
MW-36
17-Apr-13
50J
0.11
6J
21
6J
0.5J
4J
81
12B
MW-36
16-Oct-13
0.61
60J
0.2J
71
21
8J
0.6J
4J
0.051
101
4.113
MW-36
16-Apr-14
901
0.31
19
51
23
2J
91
0.11
33
32B
MW-36
12-Nov-14
130
0.6J
32
91
39
1
15J
0.3J
40
46
MW-36
30-Apr-15
0.61
100J
0.31
24
71
27
2J
0.021
11J
0.2J
29
27
MW-36
15-Oct-15
130
0.7J
38
10
46
3J
0.05J
16J
0.3J
37
41
MW-36
20-Apr-16
70J
0.31
13
31
15
11
6J
0.11
111
17
MW-36
13-Sep-16
62J
0.24.1
0.047J
11
3.OJ
10B
0.88J
5.1
0.0881
14J
16
MW-36
20-Apr-17
40J
2.8J
2.9J
1.8J
4.41
11
MW-36
22-Sep-17
70J
0.32.1
16
3.3J
18
1.1
6.6J
20J
16
MW-36 (dissolved)
22-Sep-17
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
4.91
NA
MW-36
13-Apr-18
54J
0.29.1
5.41
3.1
0.75J
1.8J
3.2J
4.0.1
MW-36 (dissolved)
13-Apr-18
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-36
25-Oct-18
80J
0.20J
27
4.8J
20
1.6J
12J
25
25
MW-36 (dissolved)
25-Oct-18
NA
NA
NA
NA
NA
2.31
NA
NA
NA
NA
NA
NA
NA
NA
MW-36
25-Apr-19
180
0.33J
57
11
55
4.1
181
0.31J
55
59
C Mti1 Page 9 of 19 Corrective Action Plan Addendum

Table 1-2a
Detected Groundwater Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
Notes:
1. All units are in micrograms per liter (parts per billion).
2. * - Interim Maximum Allowable Concentration (IMAC)
3. dup - Duplicate Sample
4. (4) - Monitoring wells MW-22, -24, -30, -31, and TB -la were not sampled during the April 2019 sampling events due to insufficient volumes of water in the wells.
5. J - Indicates the analytical result is an estimated concentration between the method detection limit and the limit of quantitation.
6. B - The analyte concentration detected in the method blank was greater than the method detection limit.
7. Monitoring wells MW-28, -28d, -33, -34, -34d, and -35 are sampled yearly during the spring event.
8. Dissolved metal samples were collected to evaluate the influence of turbidity on total metal concentrations as part of an ongoing Alternate Source Demonstration.
9. NA - Not Analyzed
Concentration exceeds the 15A NCAC 02L .0202 (North Carolina 2L) or IMAC Standard.
Indicates the result is below the detection limit.
C Mti1 Page 10 of 19 Corrective Action Plan Addendum

Table 1-2b
Detected Groundwater Constituents - Volatile and Semi -Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-11
1-Nav-11
MW-11
25-Apr-12
MW-I1
23-0ct-12
MW-11
17-Apr-13
MW-I1
16-0ct-13
MW-11
16-Apr-14
MW-I1
12-Nov-14
MW-11
30-Apr-15
0.54J
MW-I1
15-0ct-15
0.28JB
MW-11
21-Apr-16
MW-I1
I-Sep-16
MW-11
20-Apr-17
MW-I1
22-Sep-17
MW-11
13-Apr-18 211
MW-I1
25-0ct-18
MW-11
25-Apr-19
MW-Ild
2-Nov-I1
MW-Ild
26-Apr-12
MW-Ild
24-Oct-12
MW-Ild
18-Apr-13
MW-lld
17-Oct-13
MW-Ild
17-Apr-14
MW-lld
13-Nov-14
MW-Ild
29-Apr-15
MW-lld
15-Oct-15
0.24JB
MW-Ild
21-Apr-16
1.31
0.711
MW-lld
1-Sep-16
MW-Ild
20-Apr-17
MW-lld
22-Sep-17
MW-Ild
12-Ap118
MW-lld
23-Oct-18
MW-Ild
25-Apr-19
MW-SR
31-0c[-11
MW-SR
24-Apr-12
MW-5R
22-Oct-12
0.67)
MW-5R
17-Apr-13
0.22)
MW-5R
16-Oct-13
MW-SR
16-Apr-14
MW-SR
12-Nov-14
MW-SR
30-Apr-15
MW-SR
15-Oct-15
0.49)
0.34JB
MW-SR
21-Apr-16
MW-SR
14-Sep-I6
MW-SR
20-Apr-17
MW-SR
20-Sep-17
5.01
3.4
1.11
0.611
0.721
4.8
MW-5R
11-Apr-IS
MW-5R
24-0ct-18
0.411
MW-5R
22-Apr-19
0.75
0.54
2.5
0.51
52
1
1
0.54
MW-6
1-Nov-11
1.11
1.7
I.OI
0.951
MW-6
24-Apr-12
0.7J
0.51
0.51
0.42J
0.56)
MW-6
22-0ct-12
4.61
1.]1
1.3
2.51
0.581
1.4
MW-6
17-Apr-13
0.79)
1.71
0.43J
MW-6
16-Oct-13
0.48J
3.01
0.601
0.57J
MW-6(dup(
16-Oct-13
8.2J
0.54)
3.OJ
0.55J
0.54J
MW-6
16-Apr-14
0.52J
0.971
MW-6(dup(
16-Apr-14
0.50)
I.OJ
MW-6
12-Nov-14
1.1
a251
1.21
1.3
0.801
MW-6
30-Apr-15
0.48J
0.60)
1.21
MW-6
14-Oct-15
0.621
2.31
0.501
MW-6
20-Apr-16
0.45)
0.52J
3.OJ
MW-6(dup(
20-Apr-I6
0.38J
0.581
MW-6
14-Sep-16
0.83)
1.51
MW-6
20-Apr-17
0.82J
0.981
MW-6(dup(
20-Apr-17
0.90)
1.21
MW-6
21-Sep-17
0.83J
2.81
0.611
0.56J
MW-6
12-Ap1I8
0.691
0.84J
MW-6
24-0ct-18
0.61
1.3
2.2
0.56
26
0.47J
MW-6
22-Apr-19
4.9
MW-6d
2-Nov-11
0.721
1.5)
3.M
0.43)
MW-6d
26-Apr-12
0.61J
0.53J
2.31
0.40J
0.42J
MW-6d(dup(
26-Apr-12
0.58J
2.31
043J
MW-6d
23-Oct-12
0.77J
1.1)
3.01
0.54J
0.48J
0.53J
0.52J
MW-6d
18-Apr-13
0.521
2.31
0.481
0.31
0.391
MW-6d (dup(
18-Apr-13
0.58J
2.41
0.47J
0.39J
0.44J
0.36J
MW-6d
17-Oct-13
0.75J
1.8)
3.31
0.65J
0.53J
MW-6d
17-Apr-14
0.42J
0.93J
0.28J
MW-6d
12-Nov-14
0.51J
1.51
0.381
MW-6d
30-Apr-IS
0.30J
0.50J
0.871
1.518
0.22J
MW-6d (dup(
36Apr-15
0.401
0.831
1.518
MW-6d
15-Oct-15
0.35J
0.37J
0.821
0.251E
MW-6d
20-Apr-16
0.51J
2.OJ
0.351E
MW-6d
I2-Sep-16
0.41J
I.OJ
MW-6d
20-Apr-17
0.511
0.43J
1.51
0.51J
1.6J
MW-6d
22-Sep-17
0.601
0.71J
1.9J
0.49J
MW-6d
13-Apr-18
0.8IJ
MW-6d
24-Oct-18
0.99
MW-6d
23-Apr-19
0.97
MW-7
2-Nov-Il
7.6J
1.6
1.4
MW-7
26-Apr-12
120
0.661
0.791
0.49J
MW-7
22-Oct-12
15
0.75J
1.4
0.93
MW-7
16-Apr-13
0.661
0.15J
1.2
1.21
MW-7
16-Oct-13
0.811
0.40J
1.5
MW-7
16-Apr-14
0.611
0.521
1.2
0.3D
MW-7
lI-Nov-14
0.701
0.57J
0.561
1.2
0.32J
0.801
MW-7
36Apr-15
0.691
2.7
2.81
0.511
0.59J
1.51E
0.851
MW-7
14-Oct-15
0.521
0.691
1.1
MW-7
20-Apr-16
0.83J
0.521
2.2
0.46J
1.61
1.5
MW-7
13-Sep-16
1.31
1.6
0.42)
0.41J
0.60J
MW-7
1&Apr-17
0.74J
1.11
1.4
MW-7
18-Sep-17
0.551
0.941
0.731
MW-7
11-Apr-18
0.561
0.51)
MW-7
25-Oct-18
0.66
MW-7
24-A r-19
0.48J
1.0
smith
DM Page 11 of 19 Corrective Action Plan Addendum

Table 1-2b
Detected Groundwater Constituents - Volatile and Semi -Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-8
31-Oct-11
0.66J
14
LIU
MW-8
24-Apr-12
0.751
23
MW-8
22-0ct-12
0.471
0.40J
1.11
25 0.651
0.41J
MW-8
17-Apr-13
0.511
0.231 0.53)
0.771
35 0.321
0.471
MW-8
16-Oct-13
0.481
0.17J 0.47)
0.62J
37
MW-8
16-Apr-14
0.47J
0.67)
0.581
39
0.401
MW-8
12-Nov-14
0.501
0.1, 0.54)
0.64J
48 0.321
MW-8
30-Apr-15
0.94J
0.351 1.1
0.94J
98 1.61B
0.291
0.64J
0.401
MW-8
15-Oct-15
0.561
0.27J 1.0
0.55J
64 0.441B
0.54J
MW-8
21-Apr-16
0.701
0.361 1.4
0.74J
0.251
0.451
MW-8
14-Sep-16
0.531
1.2
0.71J
61
0.]1
MW-8
20-Apr17
0.49J
0.50J
0.571
MW-8
I8-Sep-17
01.
541
0.44J
21
05
MW8
12-Ap
62J
1
0.431
4
0.411
1.8
W8
1
24-Oct-18
0.56
1.6
33
MW-8
22-Apr9
8.3
MW-8 du
22-A r19
MW-8d
2-Nov-I1
MW-8d
26-Apr-12
0.421
MW-8d
24-Oct-12
0.511
MW-8d
18-Apr-13
0.36J
MW-8d
17-Oct-13
0.431
MW-8d
17-Apr-14
MW-8d
12-Nov-14
MW-8d
30-Apr-15
0.38J
MW-8d
15-0ct-15
0.44J
MW-8d
21-Apr-I6
0.60J
MW-8d
14-Sep-16
0.481
MW-8d
20-Apr-17
0.501
MW-8d
IB-Sep-17
MW-8d (dup)
18-Sep-17
MW-8d
12-Apr-I8
MW-Sd
23-Oct-18
MW-8d (dup)
23-Oct-18
MW-8d
23-A r-19
MW-9
1-Nov-I1
5.9
11
11
12
MW-9(dup)
1-Nov-I1
6.1J
1.31
19
10
12
10
MW-9
25-Apr-12
1.8
9.8
15
0.681
0.54J
0.471
19
MW-9
23-Oct-12
2.01
3.31
9 MW-
17-Apr-13
1.31
2.11
MW-9
16-Oct-13
2.01
4.21
MW-9
16-Apr-14
0.371
0.25)
2.81
6.4
0.361
MW-9
12-Nov-14
2.31
0.251
5.3
MW-9 (dup)
12-Nov-14
2.11
4.61
MW-9
29-Apr-15
2.L
5.9
MW-9
15-Oct-15
0.421
2.91
8.6
0.25J
0.28JB
MW-9
20-Apr-I6
0.291
2.51
0.271
5.7
1.0
MW-9
13-SeD-16
2.71
8.6
MW-9
19-Apr-1]
2.31
7.2
MW-9
21-SeD-17
1.81
6.2
MW-9
11-Apr-IB
8.L
1.6J
3A1
MW-9
25-Oct-18
0.63
2.1
2.11
MW-9
25-Apr-19
2.1
2.7
4.7
12
0.421
5.2
MW-10
31-Oct-11
3.2
1.41
0.901
4.91
42
2.9
2.6
1.3
MW-10
25-Apr-12
101
2.23
1
3.21
44
2.9
2.1
1.4
MW-10
23-Oct-12
3.3
1.81
1.3
5.3
52
0.41J
2.3
2.6
3.1
MW-10
17-Apr-13
3.2
0.231
2.3
0.231
39
0.211
0.261
4.]
6.1
0. 181
MW-10
16-Oct-13
1.1
0.171
2.4
4.01
23
2.1
3.1
0.761
MW-10
16-Apr-14
1.4
0.681
2.0
2.91
24
2.6
2.1
0.161
MW-10
12-Nov-14
1.5
1.01
2.4
4.61
0.241
39
0.27J
30
12
3.9
MW-10
29-Apr-15
2.6
0.291
2.6
2.41
29
2.5
3.]
1.5
MW-10
14-Oct-15
1.2
0.36J
4.4
3.4J
0.34J
29
0.21J
3.0
3.3
MW-10
20-Apr-I6
2.9
2.4
1.71
0.311
18
0.371B
2.2
3A
2.0
0.231
MW-10
13-SeD-16
2.9
4.5
2.71
25
1.6
1.3
MW-10
19-Apr-17
1.5
0.501
0.56J
3.51
0.501
22
0.561
4.1
1.9
MW-10
22-SIP-17
0.951
4.6
2.6J
0.42J
7.1
1.0
3.4
MW-10
11-Apr-IB
1.
0.491
2.91
1.71
3A1
0.581
1.6
Li,_
MW-10
25-Oct-18
0.75
4.0
1.9
4.1
0.69
1.7
0.85
MW-10
25-Apr-19
2.31
1.]
0.89
8.0
0.93
0.6]
MW-IOd
2-Nov-I1
2.2J
0.921
MW-10d
16-Apr-12
0.701
2.21
0.61
0.52)
0.501
MW-IOd
24-Oct-12
0.55J
2.3J
0.47J
0.64J
0.671
0.45J
MW-10d
18-Apr-13
21
0.621
0.57)
0.64)
0.361
MW-IOd
16-Oct-13
1.81
0.56J
0.57J
MW-10d
17-Apr-14
I
0.541
0.421
MW-IOd
12-Nov-14
2.01
0.68J
0.25J
0.24J
MW-10d
30-Apr-15
0.561
0.451
1.71
0.561
1.91B
0.61)
MW-IOd
15-Oct-15
0.46J
1.4J
0.45J
0.551B
0.421
0.381
MW-10d
21-Apr-16
0.51J
1.41
0.391
0.39)
MW-IOd
14-Sep-16
1.51
0.491
MW-Ild
19-Apr-1]
0.591
1.31
0.451
0.471
MW-IOd
18-Sep-17
I.L
MW-10d
11-Apr IB
0.48N1
1.21
0.411
0.421
MW-IOd
25-Oct-18
1.2
0.451
MW-10d
25-Apr-19
0.98
MW-22
1-Nov-I1
MW-22
25-Apr-12
MW-22
23-Oct-12
MW-22
17-Apr-13
MW-22
16-Oct-13
MW-22
16-Apr-14
MW-22
12-Nov-14
5.91
MW-22
30-Apr-15
0.431
MW-22
15-Oct-15
MW-22
20-Apr-I6
0.801
MW-22
13-Sep-16
MW-22
19-Apr-17
Not sampled" "
MW-22
13-Apr-18
Not sampled"°1
MW-22
23-Oct-18
Not sampled":�
MW-22
23-Apr-19
Not sa -pled
Smith Page 12 of 19 Corrective Action Plan Addendum

Table 1-2b
Detected Groundwater Constituents - Volatile and Semi -Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-23
2-Nov-I1
MW-23
23-Apr-12
MW-23
24-0ct-12
1AW-23
18-Apr-13
MW-23
16-0ct-13
MW-23
16-Apr-14
MW-23
12-Nov-14
MW-23
30-Apr-15
MW-23
15-Oct-15
MW-23(dup)
15-0ct-15
MW-23
20-Apr-16
0.721
MW-23
13-Sep-16
MW-23
19-Ap117
MW-23
11-Apr-18
MW-23
25-0ct-18
MW-23
25-Apr-19
MW-231
25-Apr-12
MW-23d
23-Oct-12
MW-23d
18-Apr-13
MW-23d
17-Oct-13
MW-23d
17-Apr-14
MW-23d
13-Nov-14
MW-23d
29-Apr-IS
MW-23d
15-Oct-15
MW-23d
20-Apr-I6
0.611
MW-23d
13-Sep-16
MW-23d (dup)
13-Sep-I6
MW-23d
19-Apr-17
0.44J
MW-23d
21-Sep-17
3.4J
MW-23d
10-Apr-I8
MW-23d (dup)
10-Apr-I8
MW-23d
23-Oct-18
MW-23d
23-A r-19
MW-24
2-Nov-I1
8.9
MW-24
26-Apr-12
7.3
MW-24
23-Oct-12
8
MW-24
17-Apr-13
8.7
MW-24
16-Oct-13
7.9
MW-24
16-Apr-14
6.2
MW-24
12-Nov-14
5.9
MW-24
29-Apr-15
6.0
MW-24
14-Oct-15
4.91
MW-24
20-Apr-I6
4.71
0.46J
MW-24
13-Sep-16
3.SJ
MW-24
19-Apr-1]
4.3J
MW-24
20-Sep-17
3.6J
MW-24
11-Apr-I8
3.21
MW-24
23-Oct-18
Not sampled
MW-24
24-Apr-19
Not sampled141
MW-28
18-Apr-13
0.58J
MW-28
17-Apr-14
0.3M
MW-28
30-Apr-IS
MW-28
21-Apr-I6
MW-28
20-Apr-17
MW-28
13-Apr-IB
0.541
MW-28
25-Apr-19
MW-28d
26-Apr-12
19J
MW28d
18-Apr-13
Z28d
17-Apr-14
MW-28d
30-Apr-IS
0.29J
MW-28d
21-Apr-I6
MW-28d
10-Apr-17
MW-28d
13-Apr-IB
MW-28d
25-Apr-19
MW-29d
1-Nov-11
MW-29d
26-Apr-12
MW-29d
24-0ct-12
MW-29d
18-Apr-13
MW-29d
17-0ct-13
MW-29d
17-Apr-14
28.5
MW-29d
13-Nov-14
0.23)
4.611
MW-29d
29-Apr-15
6.7J
MW-29d
15-Oct-15
0.2918
0.25)
MW-29d
21-Apr-16
MW-29d
12-Sep-16
MW-29d
19-Apr-17
MW-29d
22-Sep-1]
MW-29d
12-Apr-IS
0.57J
MW-29d
24-Oct-18
0.41J
MW-29d
25-Apr-19
MW-30
1-Nov-11
MW-30
25-Apr-12
MW-30
23-0ct-12
MW-30
17-Apr-13
MW-30
16-0ct-13
MW-30
16-Apr-14
MW-30
12-Nov-14
MW-30
29-Apr-15
MW-30
15-Oct-15
MW-30
21-Apr-16
MW-30
14-Sep-16
MW-30
20-Apr-17
MW-30
22-Sep-1]
Not sampled
MW-30
12-Apr-18
Not sampled�41
MW-30
24-0ct-18
Not sampled:�
MW-30
25-Feb-19
Not sampled
Smith Page 13 of 19 Corrective Action Plan Addendum

Table 1-2b
Detected Groundwater Constituents - Volatile and Semi -Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-31
1 7- 77,- 7- 1 - 1 77
1-Nov-I1 2.1J
MW-31
25-Apr-12 1.31
MW-31
23-Oct-12 2.0J
MW-31
17-Apr-13 1.4J
MW-31
16-0ct-13 1.4J
MW-31
16-Apr-14 1.61
MW-31
12-Nov-14 1.01
MW-31
29-Apr-15 1.61
MW-31
14-0ct-15 0.82J
MW-31
21-Apr-16 2.11
MW-31
3-Sep-,6 0.761
MW-31
19-Apr-17 0.41J
MW-31
21-Sep-11
Not sampled '
MW-31
12-Apr-18
Not sampled
MW-31
24-0ct-18
Not sampled141
MW-31
24-Apr-19
Not sampled 141
MW-31d
31-Oct-11
23
MW-31d
24-Apr-12
23
MW-31d
22-Oct-12
22
MW-31d
16-Apr-13
21
MW-i1
15-Oct-li
17
MW-31d
15-Apr-14
17
MW-31d
11-Nov-14
17
MW-31d
28-Apr-15
16
MW-31d
13-Oct-15
12
MW-31d
21-Apr-16
13
MW-31d
13-Sep-I6
10
MW-31d
19-Aprv17
13
MW-31d
18-Sep-"
12
MW-31d
13-Apr 18
9.2
MW-31d
24-Oct-18
9.4
MW-31d
24-Apr-19
6.8
MW-32
1-Nov 11
MW-32
25-Apr-12
MW-32
23-Oct-12
MW-32
17-Apr-13
MW-32
16-Oct-13
MW-32
16-Apr-14
MW-32
12-Nov-14
MW-32
29-Ap,15
0.411
MW-32
14-Oct-15
MW-32
21-Apr-16
MW-32
13-Sep-I6
MW-32
20-Apr-17
MW-32
22-Sep-17
MW-32
13-Apr-I8
MW-32
25-0ct-18
MW-32
25-Apr-19
T
1-Nov-11
1.61
TB-B-la la
25-Apr-12
0.91
TB -la
23-Oc[-12
0.74J
TB -la
17-Apr-13
0.701
TB -la
16-0ct-13
0.351
TB -la
16-Apr-14
0.451 0.321
TB -la
12-Nov-14
0.601
TB -la
29-Ap,15
1.51
TB -la
15-Oct-15
0.451
0.2718
TB -la
21-Apr-16
TB -la
14-Sep-I6
0.65J
TB -la
20-Apr-17
0.42J
TB -la
22-Sep-17
Not sampled
TB -la
12-Apr-I8
Not sampled°,
TB -la
24-Oc[-18
Not sampled(°)
TB -la
24-Apr-19
Not sam led°,
TB -la deep
31-Oc[-11
31
TB -la deep
24Apr-12
23
TB -la deep
23-Oc[-12
22
TB -la deep
16-Apr-13
20
TB -la deep
15-Oct-13
16
TB -la deep
15-Apr-14
13
TB -la deep
11-Nov-14
10
TB -la deep
28-Ap,15
8.9
0.42J
TB -la deep
14-Oct-15
4.91
TB -la deep
20-Apr-16
2.61
0.41J
TB -la deep
13-1ep-16
2.61
TB -la deep
9-Apr-17
2.71
1.41
TB -la deep
22-1ep-17
1.91
TB -la deep
13-Apr-IS
1.31
TB -la deep
24-Oct-11
0.85
TB -la deep
24-Apr-19
0.56
MW-33
17-Apr-13
MW-33
15-Apr-14
MW-33
29-Apr-15
MW-33
21-Apr-16
MW-33
21-Apr-17
MW-33
13-Apr-IS
MW-33
24-Apr-19
MW-34
17-Mar-11
0.891
10
11
11
2.2
3.4
MW-34
21-Apr-12
0.601
0.621
0.601
1.2
1.81
14
9
7.6
2.2
3.3
0.921
MW-34
17-Apr-13
0.561
0.601
0.521
1.1
1.81
13
9.1
%
7.6
2.1
2.6
0.701
0.191
MW-34
15-Apr-14
0.501
0.99J
0.4D
1.0
1.41
14
4.11
1.0
22
0.591
MW-34
29-Apr-I5
0.85J
0.35J
0.51J
0.65J
1.5
1.71
18
0.34J
10
7.2
1.3
3.0
0.641
1.71
MW-34
21-Apr-16
0.7]1
0.711
1.9
2.01
17
0.301
11
64
2.3
1.01
MW-34
20-Apr-17
0.751
0.651
1.4
2.61
13
0.51J
12
9.3
2.4
2.9
1.2
MW-34
13-Apr-18
0.11
0.441
2.11
8.2
12
9.7
1.8
2.1
0.771
MW-34
25-Apr-19
0.65
0.56
1.4
12
8.2
7.1
1.4
3.0
0.79
Smith Page 14 of 19 Corrective Action Plan Addendum

Table 1-2b
Detected Groundwater Constituents - Volatile and Semi -Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-34d
21-Apr-12
0.771
0.931
MW-34d
16-Apr-13
0.8.31
MW-34d
15-Apr-14
0461 09913
.
2I.2.71J1
..9
02..91611 0.581
0.76J
0.75J
MW34d
28-4r15
0.421 0.651 0.701 341
3J
0.671
0.3812
MW-334
21-Apr-16 0.791
0
6.1 2.3
1.1
MW 4
pr-17
0.49J 1.0) 3.1
2.91
0,780.72J
0.85J
0.59J
M
11-Apr-18
1
1.41
571
MW-34
3
23r-1
Ap
2.0
1W4d
0.80 0.451
0.52
MW-35
25-Apr-12
MW-35
17-4r-13
0.531
MW-35
16-Apr-14
0.25J
MW-35
29-Apr-15
0.44J
0.621
0.271
MW-35
20-Apr-16
0.881
0.391
0.41J
MW-35
20.Apr-17
1.61
0.6'
0.611
L2
MW-35
13-Apr-IS
2.21
1.01
0.961
0.81
MW-35
24-Apr-19
0.55
0,54
0.56
MW-36
1-Nov-I1
0.86)
8.9
4.31
1.1
MW-36
25-Apr-12
5.5
3.3J
0.74J
MW-36
23-Oct-12
5
2.91
0.66J
MW-36(dup)
23-Oct-12
5.4
2.81
0.67J
MW-36
18-Apr-13
0.18J
3.71
2.31
0.42J
MW-36
16-Oct-13
3.&1
2.5J
MW-36
16-Apr-14
3.11
2.11
0.261
0.37J
MW-36
12-Nov-14
3.51
2.5J
MW-36
30-Apr-IS
0.461
2.81
2.31
0.23J
MW-36
15-Oct-15
2.41
2.1J
0.37JB
0.25J
MW-36
20-Apr-I6
1.81
2.11
MW-36
13-Sep-16
4.51
4.3J
MW-36
20.Apr-17
2.41
2.61
MW-36
22-Sep-17
2.41
3.1J
MW-36
13-Apr-I8
3.2J
1.61
2.11
MW-36
25-Oct-18
1.8
3.2
MW-36
25-A r-19
1.4
2.8
MW-36d (dup)
18-Mar-11
1.21
8.9
5.1
1.1
1.
1.7
MW-36d
2-Nov-11
1.41
9.2
4.01
0.89J
1.0
1.4
MW-36d
26-Apr-12
0.53)
1.41
8
4.01
0.861
1.3
MW-36d
24-Oct-12
0.45J
0.56J
1.31
7.6
3.81
0.58J
0.68J
1.3
MW-36d
18-Apr-13
0.251
7.1
4.01
0.54J
0.73)
1
MW-36d
17-Oct-13
0.261
0.63J
1.71
7.9
5.5
0.631
1.1
MW-36d
17-Apr-14
5.7
4.61
0.681
0.87J
MW-36d
13-Nov-14
0.541
OM
0.66J
0.531
6.4
5.5
0.72J
7.9
MW-36d
29-Apr-15
0.75)
0.54J
6.7
6.5
2.1J
0.64J
0.87J
MW-36d
15-0ct-15
0.371
4.81
4.71
0.62J
0.33J
0.691
MW-36d
20-Apr-16
0.67)
3.91
0.251
4.9J
0.56JB
0.40J
MW-36d
14-Sep-16
0.691
5.5
5.8
0.541
0.501
0.631
MW-36d
20.Apr-17
0.621
5.4
5.9
0.431
0.591
0.631
MW-36d
21-Sep-17
1.21
1.31
MW-36d
13-Apr-18
3.21
3.01
MW-36d
25-Oct-18
3.1
2.6
0.451
MW-36d
24API-19
0.471
3.2
4.2
Notes.
1. All units are in micrograms per liter (parts per billion).
2. • - Interim Maximum Allowable Concentration (IMAC(
3. INS - Not Sampled; NE - Standard Not Established; cup - Duplicate Sample
4. 141- Monitoring wells MW-22, -24, -30, -31, and TB -la were not sampled during the April 2019 sampling event due to insufficient volumes of water in the wells.
te 5.1- Indicates he analytical result is an estimated concentration betwen ethe method detection limit and the limit of q.antitati,n.
6. B - The analyze concentration detected in the method blank was greater than the method detection limit.
1. H - The analyte was out of holding time.
8. Monitoring wells M W-28, -28d, -33, -34, -34d, and -35 are sampled yearly during the spring event.
Concentration exceeds the 15A NCAC 02L .0202 (North Carolina 2L) or MAC Standard
- Indicates the result is belowthe detection limits.
smith
DM Page 15 of 19 Corrective Action Plan Addendum

Table 1-2c
Detected Surface Water Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
SW-2
1-Nov-11
77.1J
9.49J
5.46J
14.1B
4.12J
5.20BJ
2.35J
22.0J
25.7
SW-2
26-Apr-12
33.6J
1.95J
2.03J
SW-2
24-Oct-12
35J
SW-2
18-Apr-13
40J
0.5BJ
0.1J
1J
2BJ
SW-2
17-Oct-13
0.5J
40J
0.11
11
SW-2
16-Apr-14
0.7J
40J
0.8J
0.2J
3J
0.4J
0.6J
5J
10BJ
SW-2
12-Nov-14
40J
0.4J
0.06J
0.7J
2BJ
SW-2
29-Apr-15
40J
0.6J
0.2J
1J
4J
SW-2
15-Oct-15
30J
0.2J
0.5J
0.7J
0.5J
0.07J
SW-2
21-Apr-16
0.6J
40J
0.6J
0.7J
SW-2
14-Sep-16
37J
1.1JB
0.15J
2.2J
4.9JB
SW-2
20-Apr-17
130
0.901
5.01
SW-2
21-Sep-17
35J
0.26J
1.6J
1.7J
6.1J
SW-2
13-Apr-18
36J
1.4J
2.6J
SW-2
24-Oct-18
34J
2.9J
SW-2
24-Apr-19
33J
1.3J
4.1J
SW-3
1-Nov-11
33.4J
2.11J
5.21JB
2.22BJ
4.06J
6.46J
SW-3
26-Apr-12
29.35J
1.63J
2.37J
3.87J
4.22J
SW-3
24-Oct-12
31.3J
1.69J
SW-3
18-Apr-13
60J
0.11
3BJ
4J
4J
1J
2J
2J
10BJ
SW-3
15-Oct-13
30J
26
0.2J
1J
0.8J
SW-3
15-Apr-14
0.91
20J
0.04J
2J
1.0J
7J
1J
11
91
12B
SW-3
11-Nov-14
30J
0.3J
0.05J
0.4J
0.8J
SW-3
29-Apr-15
0.6J
30J
0.3J
0.1J
0.5J
SW-3
14-Oct-15
40J
0.04J
11
0.91
11
0.51
2J
3J
SW-3
21-Apr-16
30J
0.5J
0.1J
0.5J
SW-3
12-Sep-16
0.26J
49J
1.3J
3.1J
2.9JB
1.11
1.11
6.9J
12
SW-3
20-Apr-17
40J
1.7J
0.43J
3.3J
4.7J
SW-3
20-Sep-17
30J
0.26J
1.2J
1.5J
6.9J
SW-3
13-Apr-18
31J
1.3J
SW-3
24-Oct-18
32J
3.11
SW-3
24-Apr-19
33J
�m lti1 Page 16 of 19 Corrective Action Plan Addendum

Table 1-2c
Detected Surface Water Constituents - Metals
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
Notes:
1. All units are in micrograms per liter (parts per billion).
2. (2) - A Standard for total chromium has not been established. The value provided is for chromium (III).
3. NS - No Standard
4. * - North Carolina Protective Value
S. J - Indicates the analytical result is an estimated concentration between the method detection limit and the limit of quantitation.
6. B - The analyte concentration detected in the method blank was greater than the method detection limit.
Concentration exceeds the North Carolina 15A NCAC 02B or Protective Value Freshwater Aquatic Life Standard for Class C Waters -
September 2017
Indicates the result is below the detection limit.
�m lti1 Page 17 of 19 Corrective Action Plan Addendum

Table 1-2d
Detected Surface Water Constituents - Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
smith Page 18 of 19 Corrective Action Plan Addendum

Table 1-2d
Detected Surface Water Constituents - Volatile Organic Compounds
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
Notes:
1. All units are in micrograms per liter (parts per billion).
2. NS - No Standard
3. * - North Carolina Protective Value
4. J - Indicates the analytical result is an estimated concentration between the method
detection limit and the limit of quantitation.
5. B - Analyte found in the associated method blank as well as in the sample.
Concentration exceeds the North Carolina 15A NCAC 02B or
Protective Value Freshwater Aquatic Life Standard for Class C
Waters - September 2017
Indicates the result is below the detection limit.
smith Page 19 of 19 Corrective Action Plan Addendum

Table 1-3
Geochemical Data
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
o
MW-5R 16-Mar-11 141.9 5.94 1.89 <2 <10 1.60 <2 <2 3.8JB 0.53J 0.92J 250D 8.3J <0.1 164 <0.05 <0.5 <0.5 <0.5 <0.5 <0.5 2.7
MW-5R 31-Oct-11 156.8 5.71 0.75 <2 <10 3.88 <2 <3 2.7JB 12.0 1.4 110D 3.9J <0.1 335 D 0.140 0.51 <0.07 0.111 <0.07 <0.07 1.9
MW-5R 24-Apr-12 192.5 5.72 1.48 <2 <10 <0.43 <0.2 <0.54 2.2J 10.0 1.1 110 3.4J <0.01 321D <0.046 <0.04 <0.24 <0.87 <0.62 <0.048 <0.057 <0.061 2.4
MW-5R 22-Oct-12 96.1 6.20 2.22 <2 13 1.64 <0.2 <0.54 3.1JB 4.3J 1.4 190 5J <0.01 375D <0.046 <0.031 <0.031 <0.078 <0.095 <0.052 <0.063 <0.01 9.1
MW-5R 17-Apr-13 110.1 6.46 0.73 <4 <16 0.31J <0.061 <0.069 1.4 9.07 1.4 135 2.11 <0.4 180 0* <0.5 <1 <0.5 <0.5 <0.25 0.38J
MW-5R 16-Oct-13 132.5 6.08 1.88 <4 <16 2.3 <0.061 <0.069 1.70 9.90 1.1 184 2.98 <0.4 210B 0.2* <0.5 <1 <0.5 <0.5 <0.25 0.82
MW-5R 16-Apr-14 139.7 5.48 3.09 (1) <16 <1.3 <0.61 <0.069 1.4 9.35 0.7J 11.5 1.3 <0.4 180 0* <0.5 <1 <0.5 <0.5 <0.25 1.2
MW-5R 12-Nov-14 -116.7 6.74 1.41 (1) <16 1.1J <0.61 <0.069 2.1 6.25 <0.09 211 2.9B 0.4JB 130 0* <0.5 <1 <0.5 <0.5 <0.25 11
MW-5R 30-Apr-15 14.4 5.39 2.41 <2 <16 <0.30 <0.61 <0.069 1.6 8.00 0.9J 62.1 1.5 <0.4 120 0* <0.5 <1 <0.5 <0.5 <0.25 2.8
MW-5R 15-Oct-15 156.1 6.38 2.12 <2.0 <16 1.9 <0.061 <0.069 2.8 0.137 1.0 272 9.5 0.5J 110 0* <0.50 <1.0 <0.50 <0.50 <0.020 2.4
MW-5R 21-Apr-16 116.7 5.54 1.36 <2.0 <16 <0.30 <0.061 <0.069 1.6 3.65 0.9J 39.1 1.1 <0.4 110 0.5* <0.50 <1.0 <0.50 <0.50 <0.020 14.0
MW-5R 14-Sep-16 109.2 5.88 1.99 <2.0 <10 4.2J <10 <10 2.6 1.8 0.561 220 3.4B <3.0 430 0.5* <0.30 <0.10 <0.20 <0.20 <0.30 <0.30 <0.30 3.9
MW-5R 20-Apr-17 94.2 6.29 1.30 <2.0 <10 3.6 <10 <10 2.6 1.6 1.1 200 1.1 <1.0 350 0* <1.0 <1.0 <2.0 <2.0 <1.0 <1.0 <1.0 1.6
MW-5R 20-Sep-17 -29.0 6.60 2.58 <2.0 55 4,300D <10 <10 220D 0.23 0.67 350 11D <2.5 990 5.0* <0.30 <0.10 <0.20 <0.20 <0.30 <0.30 0.26 3.0
MW-5R 11-Apr-18 40.9 5.90 1.56 <2.0 <10 <10 <10 <10 2.5 3.6 0.96J 100E 2.2 <1.0 130 0* <.0.10 <0.10 <0.20 <0.20 <0.10 <0.10 <0.10 2.7
MW-5R 24-Oct-18 52.8 6.33 0.24 <2.0 <20 11B <10 <10 4.6 0.064 1.6 260 2.6 <1.0 300 0* <0.10 <0.10 <0.20 <0.20 <0.10 <0.10 <0.10 4.6
MW-5R 22-Apr-19 179.2 4.83 2.27 <2.0 <20 <10 <10 <10 1.8 5.1 <1.0 <20 0.54J <1.0 71 0* <0.10 <0.10 <0.20 <0.20 <0.10 <0.10 <0.10 <1.0
MW-6
16-Mar-11
25.3
5.89
2.48
<2
75
899
<2
<2
140BD
0.0291
14
SOOD
6.3J
<0.1
349D
0.77
<0.5
<0.5
<0.5
18
<0.5
2.2
MW-6
1-Nov-11
10.6
6.09
1.34
<2
94
4,600
<2
<3
170BD
0.053J
22
600D
12J
<0.1
820D
1.50
<0.07
8.7
<0.14
34
<0.07
1.9
MW-6
24-Apr-12
168.6
5.85
2.14
<2
32
5,660D
<0.2
<0.54
97
0.251
4.4
190D
3.5J
<0.01
549D
<0.046
<0.04
<0.24
<0.87
<0.62
0.56
1.7
<0.061
2.6
MW-6
22-Oct-12
-134.6
6.34
4.33
<2
100
732D
<0.2
<0.54
160BD
<0.025
21
430D
11J
0.029
725D
3.6
<0.031
<0.031
<0.078
26
<0.052
30
<0.01
5.9
MW-6
17-Apr-13
-158.3
6.25
0.91
<4
<16
16
<0.061
<0.069
54.4
0.181
3.5
105
2.82
<0.4
110
1.4*
<0.5
<1
<0.5
<0.5
<0.25
0.76
MW-6
16-Oct-13
12.9
6.32
1.81
<4
40
45
<0.061
<0.069
93
0.16J
5.2
136
2.63
<0.4
98B
5.4*
<0.5
<1
<0.5
<0.5
<0.25
0.93
MW-6
16-Apr-14
43.1
5.99
1.81
(1)
<16
51
<0.061
<0.069
40.3
0.42
1.6
40.2
1.5
<0.4
69
0.5*
<0.5
<1
<0.5
<0.5
<0.25
1.3
MW-6
12-Nov-14
-121.4
6.81
0.87
(1)
74
1,400
<0.061
<0.069
184
0.09J
14.4
607
47.3
<0.4
180
1.5*
<0.5
<1
<0.5
<0.5
<0.25
7.3
MW-6
30-Apr-15
-52.3
6.05
2.01
<2
<16
23
<0.061
<0.069
50.9
0.161
2.6
192
5.9
<0.4
95
0.5*
<0.5
<1
<0.5
<0.5
<0.25
2.5
MW-6
14-Oct-15
58.9
6.68
2.39
<2.0
60
0.62J
<0.061
<0.069
208
0.017
14.7
422
19.7
0.4 UX
87
0*
2.1
<1.0
<0.50
<0.50
<0.020
2.4
MW-6
20-Apr-16
38.7
6.53
1.53
<2.0
<12
0.32J
<0.061
<0.069
58.5
0.37
2.3
164
4.1
<0.4
62
1.5*
<0.50
<3.0
<0.50
<0.50
0.151
12
MW-6
14-Sep-16
11.0
6.42
1.40
<2.0
44
3.7J
<10
<10
210D
0.037
11
390
13D
<1.0
470
1.5*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
3.8
MW-6
20-Apr-17
119.3
6.70
2.16
<2.0
22
4.2J
<10
<10
110
0.46
6.4
250
11
<1.0
350
0*
<1.0
<1.0
<2.0
<2.0
<1.0
<1.0
<1.0
22
MW-6
21-Sep-17
-59.0
7.54
2.87
<2.0
31
<10
<10
<10
140
0.069
10
430
19
<1.0
520
2.0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
3.4
MW-6
12-Apr-18
13.0
6.34
1.74
<2.0
15
140
<10
<10
<10
1.5
5.1
140B
5.5
<1.0
150
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
3.6
MW-6
24-Oct-18
49.6
6.64
0.60
3.6
37
1,900B
<10
<10
I
160
<0.020
12
590
20
<1.0
1
590
1.0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
10
MW-6
22-Apr-19
100.4
6.12
0.51
5.3
<20
1,800
<10
<10
74
1.5
2.8
220
4.1
<1.0
450
1.0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
<1.0
MW-8
16-Mar-11
208.4
5.49
1.28
<2
<10
600
<2
<2
9.5B
0.121
<1
68
2.81
<0.1
148
<0.05
<0.5
<0.5
<0.5
<0.5
<0.5
2.2
MW-8
31-Oct-11
138.1
5.61
0.65
<2
11
1,750
<2
<3
7.8B
0.121
0.84J
68
2.5J
<0.1
273D
0.130
0.99
<0.07
<0.14
0.33
<0.07
1.7
MW-8
24-Apr-12
161.7
5.64
1.67
<2
<10
1,870D
<0.2
<0.54
12
0.19J
0.95J
74
2.6J
<0.01
324D
<0.046
<0.04
<0.24
<0.87
<0.62
<0.048
<0.057
<0.061
2.0
MW-8
22-Oct-12
128.4
5.86
2.11
<2
<10
477D
<0.2
<0.54
14B
0.321
0.820J
77
3.1J
<0.01
323D
<0.046
<0.031
<0.031
<0.078
1.1
<0.052
<0.063
O.OIJ
9.8
MW-8
17-Apr-13
96.8
6.23
0.48
<4
<16
520
0.14J
O.1J
16.9
0.21
1.4
86.8
1.49
<0.4
180
0.9*
<0.5
<1
<0.5
<0.5
<0.25
0.72
MW-8
16-Oct-13
146.8
5.79
1.74
<4
<16
430
0.11J
<0.069
19.7
0.181
1.5
86.8
1.57
<0.4
200B
0.8*
<0.5
<1
<0.5
<0.5
<0.25
0.85
MW-8
16-Apr-14
122.9
5.79
0.19
(1)
<16
180
<0.60
<0.069
23.7
0.18J
1.3
87.7
1.7
<0.4
230
0*
<0.5
<1
<0.5
<0.5
<0.25
1.4
MW-8
12-Nov-14
-84.6
6.09
0.79
(1)
20
320
0.13J
0.17J
29.4
0.121
1.5
95.5
2.2B
0.4JB
160
0*
<0.5
<1
<0.5
<0.5
<0.25
17
MW-8
30-Apr-15
22.5
5.62
1.85
<2
17J
160
<0.061
0.11J
44.0
0.11J
2.8
132
2.5
<0.4
180
0*
<0.5
<1
<0.5
<0.5
<0.25
4.1
MW-8
15-Oct-15
113.1
5.93
1.63
<2.0
17J
150
<0.061
<0.069
44.9
0.0071
2.3
114
4.2
0.5J
130
0*
0.68J
<1.0
<0.50
<0.50
<0.020
2.0
MW-8
21-Apr-16
81.5
5.99
1.86
<2.0
<12
110
<0.061
<0.069
39.6
<0.04
2.6
123
2.4
<0.4
150
0*
<0.50
<1.0
<0.50
<0.50
<0.020
15
MW-8
14-Sep-16
116.9
5.75
1.77
<2.0
6.7J
640
<10
<10
45
0.021
1.9
120
2.3B
<1.0
370
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
3.8
MW-8
20-Apr-17
113.7
5.97
1.25
<2.0
8.3J
180
<10
<10
37
0.069
1.8
110
0.98J
<1.0
300
0*
<1.0
<1.0
<2.0
<2.0
<1.0
<1.0
<1.0
1.6
MW-8
20-Sep-17
154.0
6.41
1.78
<2.0
9.3
150
<10
<10
44
0.055
2.4
120
1.5
<1.0
320
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
4.4
MW-8
12-Apr-18
25.6
5.79
1.21
2.2
<10
150
<10
<10
45
0.035
2.2
140B
1.2
<1.0
150
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
2.8
MW-8
24-Oct-18
68.9
5.87
0.10
<2.0
<20
200E
<10
<10
49
<0.020
2.8
130
2.2
<1.0
180
0.5*
<0.10
<0.10
<0.20
1 <0.20
<0.10
<0.10
<0.10
3.4
MW-8
22-Apr-19
55.7
5.94
1.29
<4.0
<20
350
<10
<10
78
0.042
5.1
170
1.6
<1.0
770
1.0*
<0.10
0.10
<0.20
1 <0.20
<0.10
<0.10
<0.10
<1.0
MW-9
17-Mar-11
2.4
5.78
2.29
3
68
438
2.27
<2
18B
0.11
5.8
220D
2.7J
<0.1
231D
7.7
<0.5
<0.5
<0.5
1.8
<0.5
MW-9
1-Nov-11
6.3
5.95
1.94
<2
53
1,080
<2
<3
15B
0.0751
4.4
210D
2.9J
<0.1
414D
1.3
0.86
<0.07
<0.14
1.5
<0.07
MW-9
25-Apr-12
94.8
5.95
3.11
5.4
34
2,810D
<0.2
1.59J
18
0.079J
6.1
250D
2.8J
<0.01
503D
7.8
<0.04
<0.24
<0.87
<0.62
<0.048
1.7
<0.061
MW-9
23-Oct-12
83.4
6.72
8.77
<2
61
5.47
<0.2
<0.54
17B
<0.025
3.2
120
8.8J
<0.01
16.6
<0.230
<0.031
<0.031
<0.078
<0.095
<0.052
0.840
0.017
MW-9
17-Apr-13
91.3
6.88
6.84
3.1
22
8.5
<0.061
<0.069
17.1
<0.03
3.5
130
7.42
<0.4
10
2.1*
<0.5
<1
<0.5
<0.5
<0.25
MW-9
16-Oct-13
165.7
6.88
7.89
<4
28
0.53J
<0.061
<0.069
20.4
0.171
2.9
117
5.60
<0.4
27B
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-9
16-Apr-14
160.2
6.44
3.69
(1)
17J
17
<0.061
<0.069
18.5
0.15J
3.1
127
4.8
<0.4
39
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-9
12-Nov-14
33.5
6.80
5.67
(1)
30
1.8
<0.061
<0.069
22.7
0.101
<0.09
136
3.9B
0.4JB
28
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-9
29-Apr-15
20.6
6.57
9.69
2.8
17J
2.9
<0.061
<0.069
19.2
<0.03
3.8
156
3.6
<0.4
27
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-9
15-Oct-15
132.2
6.65
4.66
6.5
<16
<0.30
<0.061
<0.069
25.4
0.040
2.0
171
5.4
<0.4
53
0*
<0.50
<1.0
<0.50
<0.50
<0.020
MW-9
20-Apr-15
75.9
6.81
5.40
<2.0
<12
7.8
<0.061
<0.069
18.2
0.05J
1.7
182
3.4
<0.4
46
0*
<0.50
<1.0
<0.50
<0.50
<0.020
MW-9
13-Sep-16
151.7
6.72
7.15
<4.0
8.OJ
-
-
-
25
0.052
1.6
200
3.8
<3.0
-
1.0*
-
-
-
-
-
MW-9
19-Apr-17
130.8
6.93
7.28
<2.0
<10
6.181
<10
<10
24
0.00961
1.8
210
2.1
<1.0
240
1.0*
<1.0
<1.0
<2.0
<2.0
<1.0
<1.0
<1.0
MW-9
21-Sep-17
140.0
7.57
6.01
<2.0
<10
<10
<10
<10
24
0.056
1.9
200
2.8
<1.0
220
1.0*
<0.30
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-9
11-Apr-18
41.4
6.79
7.50
<2.0
<10
<10
<10
<10
23
0.080
1.8
190B
2.2
<1.0
180
1.5*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-9
25-Oct-18
51.1
7.07
8.83
2.6
<20
6.96J
<10
<10
22
<0.020
2.2
210
2.5
1.5
190
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-9
25-Apr-19
102.7
6.46
1.63
<2.0
<20
1,500
<10
<10
11
<0.020
3.7
270
1.4
<1.0
680
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
Smith Page 1 of 2 Corrective Action Plan Addendum

Table 1-3
Geochemical Data
Semi -Annual Sampling Event Summary
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
MW-10
Ox
17-Mar-11 119.7 5.29 3.18
<2
<10
2,000
<2 <2
4.316
0.039J
2.7
130
2.4J
<0.1
399D
0.26
<0.5
<0.5
o
<0.5 <0.5 <0.5
MW-10
31-Oct-11 120.1 5.41 2.12
<2
15
9,630
<2 <3
3.616
<0.1
1.1
130
2.4J
<0.1
777D
0.47
0.99
<0.07
0.12J 0.22 <0.07
MW-10
25-Apr-12 127.9 5.41 2.62
<2
10
10,3001)
<0.2 <0.54
3.5J
<0.025
3.3
120
3.1J
<0.01
832D
0.17
0.26
<0.24
0.59 0.17 <0.048 <0.057 <0.061
MW-10
23-Oct-12 99.2 5.68 2.94
<2
28
8,2201)
<0.2 <0.54
3.716
<0.025
3.6
120
2.4J
<0.01
646D
0.083
0.087
<0.031
<0.078 <0.095 <0.052 <0.063 0.01E
MW-10
17-Apr-13 113.9 6.08 2.93
<4
<16
920
<0.061 <0.069
2.71
<0.03
1.5
132
0.75
<0.4
370
1.4*
<0.5
<1
<0.5 <0.5 <0.25
MW-10
16-Oct-13 84.8 5.65 4.05
<4
19J
3,100
<0.061 <0.069
2.74
<0.03
0.91
117
0.73
<0.4
300B
1.8*
<0.5
<1
<0.5 <0.5 <0.25
MW-10
16-Apr-14 68.9 5.71 3.11
(1)
<16
3,200
<0.061 <0.069
3.4
<0.03
2.3
129
0.7J
<0.4
400
1.5*
<0.5
<1
<0.5 <0.5 <0.25
MW-10
12-Nov-14 10.9 5.84 1.81
(1)
27
3,900
0.0941 0.111
3.0
<0.03
2.5
147
LAB
<0.4
360
2.0*
<0.5
<1
<0.5 <0.5 <0.25
MW-10
29-Apr-15 30.6 5.56 2.82
3.1
<16
1,300
<0.061 <0.069
3.4
<0.03
3.0
184
0.9J
<0.4
320
2.0*
<0.5
<1
<0.5 <0.5 <0.25
MW-10
14-Oct-15 89.3 5.74 2.44
5.6
<16
1,200
<0.061 <0.069
3.3
<0.002
1.0
140
<1.8
<0.4
250
1.5*
0.67J
<1.0
<0.050 <0.50 <0.020
MW-10
20-Apr-16 30.9 5.79 2.34
6.5
16J
1,200
<0.061 <0.069
3.4
<0.04
1.6
128
<0.06
<0.4
200
1.0*
0.57J
<1.0
<0.20 <0.50 <0.020
MW-10
13-Sep-16 28.2 5.44 1.61
4.3
30
-
- -
3.6
0.024
<1.0
160
<1.0
<1.0
-
4.5*
-
-
- - -
MW-10
19-Apr-17 125.9 5.74 3.39
8.3
<10
4,800B
<10 <10
3.6
0.014J
1.2
160
<1.0
<1.0
720
3.0*
<1.0
<1.0
<2.0 <2.0 <1.0 <1.0 <1.0
MW-10
22-Sep-17 118.0 6.20 1.90
<2.0
<10
1,100
<10 <10
3.0
0.017
1.9
110
<1.0
<1.0
440
3.0*
<0.10
<0.10
<0.20 <0.20 <0.10 <0.10 <0.10
MW-10
11-Apr-18 44.1 5.60 0.71
<2.0
9.4J
750
<10 <10
3.0
0.089
0.9
88B
0.431
<1.0
140
2.5*
<0.10
<0.10
<0.20 <0.20 <0.10 <0.10 <0.10
MW-10
25-Oct-18 74.0 5.61 3.64
5.5
<20
3,200
<10 <10
3.2
<0.020
1.3
120
<1.0
<1.0
450
3.5*
<0.10
<0.10
<0.20 <0.20 <0.10 <0.10 <0.10
MW-10
25-Apr-19 7.9 5.47 0.39
5.1, 1
<20
4,2001)
<10 <10
3.9
<0.020
2.9
130
<1.0
<1.0
1,300
3.0*
0.34
<0.10
<0.20 <0.20 <0.10 <0.10 <0.10
MW-11
17-Mar-11
211.2
5.21
8.02
<2
17
0.52J
<2
<2
5B
0.6J
0.53J
32
2.11
<0.1
67.6
<0.05
<0.5
<0.5
<0.5
<0.5
<0.5
MW-11
1-Nov-11
161.6
5.62
5.89
3.20
<10
<1
<2
<3
4.11E
0.71J
0.35J
25
2.2J
<0.1
164
<0.05
0.8
<0.07
0.0771
0.16
<0.07
MW-11
25-Apr-12
112.2
5.47
6.22
<2
<10
<0.43
<0.2
<0.54
3.11
0.086J
0.76J
22
1.71
<0.01
161D
<0.046
<0.04
<0.24
<0.87
0.13J
<0.048
<0.057
<0.061
MW-11
23-Oct-12
237.1
5.82
7.22
<2
13
<0.43
<0.2
<0.54
3.71E
0.150J
1.5
27
2.1J
<0.01
147D
<0.046
<0.031
<0.031
<0.078
<0.095
<0.052
<0.063
<0.01
MW-11
17-Apr-13
102.3
5.94
5.73
<4
<16
<0.30
<0.061
<0.069
2.62
0.23
1.1
33.1
0.69
<0.4
100
0.8*
<0.5
<1
<0.5
<0.5
<0.25
MW-11
16-Oct-13
211.6
5.49
7.84
<4
<16
<0.30
<0.061
<0.069
3.16
0.26
0.7J
34.8
0.66
<0.4
82B
0.4*
<0.5
<1
<0.5
<0.5
<0.25
MW-11
16-Apr-14
198.8
5.62
5.63
(1)
34
0.59
<0.061
<0.069
3.4
0.36
0.5J
38.9
0.71
<0.4
110
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-11
12-Nov-14
116.3
5.80
4.68
(1)
57
<0.30
<0.061
<0.069
4.1
0.46
0.81
36.4
0.918
0.518
82
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-11
30-Apr-15
20.1
5.52
7.18
<2
<16
<0.30
<0.061
<0.069
3.9
0.43
0.9J
35.8
0.916
<0.4
82
0*
<0.5
<3
<0.5
<0.5
<0.25
MW-11
15-Oct-15
196.8
5.91
5.70
<2.0
<16
<0.30
<0.061
<0.069
3.6
0.480
0.3J
34.9
<1.8
<0.4
66
0*
<0.50
<1.0
<0.50
<0.50
<0.020
MW-11
21-Apr-16
135.3
5.72
5.75
<2.0
<12
<0.30
<0.061
<0.069
4.0
0.53
0.5J
33.9
0.71
0.516
75
1.5*
<0.50
<1.0
<0.50
<0.50
<0.020
MW-11
1-Sep-16
149.9
5.56
6.49
15
<10
-
-
-
5.1
0.81
<1.0
42
<3.0
<3.0
-
1.5*
-
-
-
-
-
MW-11
20-Apr-17
142.3
5.87
4.82
<2.0
<10
2.7.1
<10
<10
4.8
0.89
<1.0
36
<1.0
<1.0
150.0
0.5*
<1.0
<1.0
<2.0
<2.0
<1.0
<1.0
<1.0
MW-11
22-Sep-17
244.0
6.39
4.55
<2.0
<10
<10
<10
<10
5.2
0.88
<1.0
47
<1.0
<1.0
130
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-11
13-Apr-18
46.3
5.71
5.74
<2.0
<10
<10
<10
<10
5.4
0.89
<1.0
46B
0.27.1
<1.0
75
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-11
25-Oct-18
44.6
6.02
5.97
<2.0
<20
2.58J
<10
<10
I
5.9
0.95
<1.0
46
<1.0
I <1.0
82
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-11
25-Apr-19
87.8
5.91
5.941
3.4,1
<20
<10
<10
<10
5.8
0.94
1.9
49
<1.0
<1.0
170
0*
<0.10
<0.30
<0.20
<0.20
<0.30
<0.30
<0.30
MW-36
17-Mar-11
99.4
5.45
2.36
<2
38
44
<2
<2
7.2B
0.671
1.5
84
4.61
<0.1
140
<0.25
<0.5
<0.5
<0.5
<0.5
<0.5
MW-36
1-Nov-11
129.6
5.66
1.96
<2
36
618
<2
<3
6.46
0.51J
0.81
62
4.4J
<0.1
242D
0.052
0.99
<0.07
<0.14
0.21
<0.07
MW-36
25-Apr-12
122.2
5.71
2.84
5.2
29
186D
<0.2
<0.54
5.9
0.5J
1.1
60
3.9J
<0.01
336D
<0.046
<0.04
<0.24
<0.87
0.0731
<0.048
<0.057
<0.061
MW-36
23-Oct-12
139.1
5.92
8.39
<2
<10
39.6
<0.2
<0.54
6B
0.490J
1.7
67
3.9J
<0.01
196D
<0.046
<0.031
<0.031
<0.078
<0.095
<0.052
<0.063
<0.01
MW-36
17-Apr-13
118.1
6.05
2.44
12
<16
6.4
<0.061
<0.069
5.59
0.59
1.1
66.3
2.19
<0.4
98
0.8*
<0.5
<1
<0.5
<0.5
<0.25
MW-36
16-Oct-13
188.5
5.82
3.89
<4
38
9.8
<0.061
<0.069
5.50
0.73
1.1
59.2
2.19
<0.4
81B
1.5*
<0.5
<1
<0.5
<0.5
<0.25
MW-36
16-Apr-14
165.3
5.76
3.08
(1)
71
17
<0.061
<0.069
5.8
0.86
0.6J
55.6
2.3
<0.4
110
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-36
12-Nov-14
96.2
5.76
2.23
(1)
37
25
<0.061
<0.069
5.8
0.98
<0.09
55.3
2.68
<0.4
83
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-36
30-Apr-15
1.6
5.69
3.15
4.10
<16
3.6
<0.061
<0.069
5.8
0.89
1.4
58.4
2.3
<0.4
81
0*
<0.5
<1
<0.5
<0.5
<0.25
MW-36
15-Oct-15
167.8
5.97
3.78
<2.0
33
2.5
<0.061
<0.069
5.5
0.704
1.2
59.3
3.0
0.4J
72
0*
<0.50
<1.0
<0.50
<0.50
<0.020
MW-36
20-Apr-16
125.4
5.80
2.49
<2.0
<12
2.5
<0.061
<0.069
5.9
0.60
1.0
53.7
2.3
<0.4
76
2.0*
<0.50
<1.0
<0.50
<0.50
<0.020
MW-36
13-Sep-16
176.6
5.13
2.15
<2.0
<10
-
-
-
6.7
0.81
<1.0
55
2.5
<1.0
-
0.5*
-
-
-
-
-
MW-36
20-Apr-17
143.0
5.79
1.77
<2.0
<10
5.01
<10
<10
6.9
0.79
0.701
51
1.3
<1.0
190.0
2.0*
<1.0
<1.0
<2.0
<2.0
<1.0
<1.0
<1.0
MW-36
22-Sep-17
143.0
6.00
1.95
<2.0
<10
2.9
<10
<10
7.3
0.66
0.78
63
2.4
<1.0
220.0
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-36
13-Apr-18
45.2
5.81
1.35
<2.0
<10
<10
<10
<10
6.9
0.66
0.831
58B
3.3
<1.0
71.0
0*
<0.10
<0.10
<0.20
<0.20
<0.10
<0.10
<0.10
MW-36
25-Oct-18
98.4
5.53
0.86
<2.0
20
3.9BJ
<10
<10
7.8
0.64
1.5
60
1.8
<1.0
190
0*
10.10
<0.10
<0.20
<0.20
<0.30
<0.30
<0.30
MW-36
25-Apr-19
123.4
5.77
0.94
<2.0
<20
<30
<10
<10
8.9
0.62
1.0
61
2.3
<1.0
280
0*
<0.10
<0.10
<0.20
<0.20
10.10
10.10
<0.10
Notes:
1. All units are in milligrams per liter ((mg/L) parts per million), unless otherwise noted.
2. pg/L- micrograms per liter (parts per billion)
3. CaCO3 - Calcium Carbonate
4. MW-11 is a background well for the North Wake Unlined Landfill.
S. * - Field analysis performed using a HACH kit.
6. J - Indicates the analytical result is an estimated concentration between the method detection limit and the limit of quantitation.
7. B - The analyte concentration detected in the method blank was greater than the method detection limit.
8. D -Analyzed at dilution.
9. UX -The compound was analyzed for, but not detected. 1 mL HNO3 was added to MW-6 for metals upon receipt to get the pH to <2.
10. (1) - BOD was measured following dilution and did not meet the oxygen depletion criterion of at least 2 mg/L. The elevated BOD concentrations are a result of laboratory error and were not used to evaluate natural attem
the April and November 2014 sampling events.
11. 1- The average BOD for MW-9, -10, -36, and -11 is lower than the valid range
12. (-) Samples not collected and analyzed for the fall 2016 sampling event.
�- Blank cells indicate no data collected.
Smith Page 2 of 2 Corrective Action Plan Addendum

Table 3-2
Estimated Corrective Measures Costs
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
Phase I Tasks (Pre -Injection) I Phase 2 (Injection) I Phase 3 Tasks (Post -Injection)
Approved
Task 1-1a
Task 1-2
Task 1-3
Task 2-1
Task 2-2
Task 2-3
Task 2-4a
Task 2-4b
Task 3-1
Task 3-2
Task 3-3
Injection
Labor
planning/CAP
Injection
Technical
Design
Lactate
EVO Injection
Groundwater
Initial
LABOR
Rate
Addendum
Permit
Memo
Well Install
Verification
System Startup
Injection Event
Event
Sampling
Reporting
Meetings
Total
Principal/Associate
$ 200
2
0
0
0
0
0
0
0
0
0
8
10
Technical Review
$ 220
12
2
4
0
16
4
4
4
4
4
12
66
Project Manager
$ 180
20
4
8
2
8
8
10
10
4
20
12
106
Professional)))
$ 120
0
8
0
0
0
8
4
4
0
10
0
34
Professional))
$ 115
4
8
8
0
0
16
10
10
10
20
4
90
Professional)
$ 100
32
24
8
24
16
48
40
40
20
40
4
296
Professional)
$ 90
8
8
4
0
16
48
60
60
40
16
4
264
Sr. Project Admin.
$ 125
2
0
2
0
0
1
0
0
2
2
0
9
Project Admin
$ 90
2
0
2
0
2
2
1
1
2
2
0
14
Clerical/Administration
$ 75
0
4
4
2
0
2
0
0
0
8
0
20
TOTAL HOURS
82
58
40
28
58
137
129
129
82
122
44
909
TOTAL DOLLARS
$11,450
$6,460
$5,130
$2,910
$8,180
$14,695
$13,800
$13,800
$8,780
$14,450
$7,620
$107,275
ODCs
Car Mileage
$0
$0
$0
$50
$100
$0
$100
$100
$50
$0
$400
$800
Car/Truck Rental
$90/day
$0
$0
$0
$0
$0
$810
$900
$900
$0
$0
$0
$2,610
Airfare
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
Meals/Hotel
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$250
$250
Copying
$50
$50
$50
$0
$0
$0
$0
$0
$0
$100
$0
$250
Survey Equipment
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
FedEx
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
Water and hauling*
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
Misc. Materials & Equip.
$0
$0
$0
$250
$100
$2,240
$7,775
$7,775
$2,000
$0
$0
$20,140
.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
TOTAL ODCs
$50
$50
$50
$300
$200
$3,050
$8,775
$8,775
$2,050
$100
$650
$24,050
OPs
Analytical Laboratory
$0
$0
$0
$0
$3,000
$0
$0
$0
$1,800
$0
$0
$4,800
Survey
$0
$0
$0
$1,500
$0
$0
$0
$0
$0
$0
$0
$1,500
Driller/Injection Wells
$0
$0
$0
$20,760
$0
$0
$0
$0
$0
$0
$0
$20,760
Injection Materials (includes shipping)
................................................................................................................................
$0
.......................................................................................................................................................................................................................................................................................................................................................................................................................................
$0
$0
$0
$0
................$0 ..................
$23,075
$38,875
$0
$0
$0
$61,950
SUBTOTAL OPs
$0
$0
$0..................
$22,260
$3,000
$0
$23,075
$38,875
$1,800
$0
$0
$89,010
MARKUP
10%
$0
$0
$0
$2,226
$300.00
$0
$2,307.50
$3,888
$180
$0
$0
$8,901
TOTAL OPs
$0
$0
$0
$24,486
$3,300
$0
$25,383
$42,763
$1,980
$0
$0
$97,911
SUMMARY
LABOR
$11,450
$6,460
$5,130
$2,910
$8,180
$14,695
$13,800
$13,800
$8,780
$14,450
$7,620
$107,275
ODCs
$50
$50
$50
$300
$200
$3,050
$8,775
$8,775
$2,050
$100
$650
$24,050
OPs
$0
$0
$0
$24,486
$3,300
$0
$25,383
$42,763
$1,980
$0
$0
$97,911
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
TOTALS
$11,500
$6,510
$5,180
$27,696
$11,680
$17,745
$47,958
$65,338
$12,810
$14,550
$8,270
$229,236
Total Phase I Labor $23,040
Total Phase I CDC $150
Total Phase I OP $0
$23,190
Notes:
1. EVO - Emulsified Vegetable Oil
2. ODCs - Other Direct Costs
3. * - Assumes water will be available onsite and no hauling will be required.
Total Phase II Labor $53,385 Total Phase III Labor $30,850
Total Phase II CDC $21,100 Total Phase III CDC $2,800
Total Phase II OP $95,931 Total Phase III OP $1,980
$170,416 $35,630
Smith
Corrective Action Plan Addendum

W i �p,43 i + ••
r S•••G •. to 0M1g66o r_ y
ye
�` Unlined sae,
1XIst _ Landfill
' b 1
E ,,. 1 - Gate
b py Lr 'r�� y • t
r -a-
Unnamed Tributary of •••"••••. '
SW-2 Abbotts Creek 1
Gate
Subtitle D
C&D Landfill
La dfill
LEGEND
j Groundwater Monitoring
Well
Surface Water Sample s
_ --- - Location
Stream
Fence •`
MW 11Dlf MW-11 (approximate location)
kb1infSourc ebruary zovTAe f a e County, Noah Carolina One neap--

Figure 1-5
MW-5R - Total Volatile Organic Compounds Concentration Trend
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
100
I
80
T
r-
O
60
Q
ca
Q. 50
c
O
to
40
a�
U
i
O
v 30
on
10
I:zr
1:T
u1
Ln
to
l0
n
r-
00
00
0)
Ol
O
O
r-I
r-I
N
N
fM
ro
Ln
Ln
l0
l0
00
00
01
O
O
O
O
OL
O
O
O
O
O
O
O
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
r-I
}�.
C
U
C
Q
U
Q
u
a
u
a
u
Q
u
a
u
Q
U
Q
U
a
u
Q
U
U
Q
U
Q
U
Q
U
U
Q
U
Q
U
Q
a
o
a
o
Q
o
Q
o
a
o
Q
o
Q
o
a
o
Q
o
Q
o
a
o
a
o
Q
o
a
o
a
o
a
Date
Smith Corrective Action Plan Addendum

M
50
F
O 40
r;
CL
ca
Q. 30
10
FOR
Figure 1-6
MW-34 - Total Volatile Organic Compounds Concentration Trend
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
L }�.L }J L }J L U L }�.L }�.L U L U U L ++ L +L }U L
Q� U Q U Q U Q U Q U Q U Q U Cl U Q U Q U Q U Q U Q U Q U Q U Q U Q U Q U Q
a o a o a o Q o a o a o a o Q o Q o Q o a o a o Q o Q o Q o a o a o a o Q
Date
Smith Corrective Action Plan Addendum

Figure 1-7
MW-34d - Total Volatile Organic Compounds Concentration Trend
North Wake Unlined Landfill - Permit Number 9209-MSWLF-1984
45
40
35
c
2 30
L
Q
v, 25
++
L
Q.
20
L
v
U
15
U
10
5
a
M M M M O O r-I -i N N M M lzt IzI- V1 M lD lD I, n M M M M O O -- -i N N M M -t V1 M lD lD r- n M w M
Ql Cl 1l T O O O O O O O O O O O O O O O O O O O O -- -- -- -- -- --
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y L L L L L L L L L L L L L L L L L L L L L L
Q U Q U Q U Q U Q U Q U Q l„) Q U Q U Q U Q (J Q l„) Q l„) Q U Q (..) Q U Q (J Q lJ Q U Q U Q U Q
Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q O Q
Date
CDM
Smith Corrective Action Plan Addendum

Figure 2-1
Conceptual Site Model
North Wake Unlined Landfill
Facility Permit Number 9209-MSWLF-1984
Potential Primary Secondary Secondary
Source Release Source Release
Mechanism Mechanism
Surficial
Groundwater
Unlined I I
Landfill Discharge
Bedrock
Groundwater
I Gas I
Migration
Exposure Pathway Incomplete
Exposure Pathway Complete
Exposure Potential Potential Receptors
Medium Exposure
Route Onsite Offsite Offsite/
Worker I Worker I Resident
Direct
Dermal
O
O
O
Contact with
Ingestion
O
O
O
Waste
Inhalation
O
O
O
Dermal
O
O
O
Groundwater
Ingestion
O
O
O
Inhalation
O
O
O
Surface H
Dermal
O
O
1 O
Water
Inhalation 1
O 1
O
1 O
Groundwater
Vapor
Dermal
O
O
O
Ingestion
O
O
O
Inhalation
O
O
O
Inhalation
Smith Corrective Action Plan Addendum

Appendix A
Site Health and Safety Plan

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CDM
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
Smith
PROJECT NAME North Wake Unlined Landfill
PROJECT# 6172-238209
REGION South
Corrective Action Plan Addendum
CLIENT ORGANIZATION
Wake County
SITE ADDRESS 9209 Deponie Drive
CLIENT CONTACT
Elliott Cornell
Raleigh, Wake County, North Carolina
CLIENT CONTACT PHONE #
919-856-6433
( ) AMENDMENT TO EXISTING APPROVED H&SP?
( ) H&SP AMENDMENT NUMBER?
() DATE OF PREVIOUS H&SP APPROVAL
OBJECTIVES OF FIELD WORK:
SITE TYPE: Check as many as applicable
(e.g. collect surface soil samples):
1. Injection well installation
Active ( ) Landfill
(X) Unknown
( )
2. pH buffering verification (soil and groundwater
Inactive (X) Uncontrolled
() Military
( )
sample collection)
3. Biobarrier system instsallation
Secure (X) Industrial
() Other (specify)
4. Biobarrier injection
Unsecure () Recovery
( )
5. Groundwater sampling
Enclosed space ( ) Well Field
( )
irementsdescribed in the CDM Smith Health and Safety Manual are incorporated in this
Eah
nd safety plan by reference.
PERSONNEL AND RESPONSIBILITIES
Company/
Current Training
Project or Site
Tasks
NAMES OF WORK CREW MEMBERS
Division Office
& Medical?
Responsibilities
On Site?
Mathew Colone
CDM Smith/ETO/RAL Level C
Project Manager
1-3-4
Tom Duffy
CDM Smith/ETO/ATL Level C
Project Technical Leader
3-4
Daniel Forbes
CDM Smith/ETO/RAL Level C
Senior Project Staff
3-4
Aaron Weispfenning
CDM Smith/ETO/RAL Level C
Site Health & Safety Coordinator
1-3-4
Patrick Kane
CDM Smith/ETO/RAL Level C
2nd Health & Safety Coordinator
1-2-3-4-5
Janelle Farley
CDM Smith/ETO/RAL Level C
Field Staff
1-2-34-5
Geologic Exploration (drilling subcontractor)
Geologic Expoloration
Subcontractor
1
BACKGROUND REVIEW: (X) Complete () Incomplete
Page-1 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use CAM
CDM Smith Health and Safety Program of CDM Smith and its subcontractors Smith
SITE MAP: Show Exclusion, Contamination Reduction, and Support Zones. Indicate Evacuation and Reassembly Points
Attached
Page-2 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
Smith
HISTORY: Summarize conditions that relate to hazard. Include citizen complaints, spills, previous investigations or agency actions, known injuries, etc.
In November 1996, Wake County began disposal of municipal solid waste in the North Wake Subtitle D Landfill. A low permeability cap was installed to close the North
Wake Unlined Landfill (Site). A methane gas recovery system was installed in the waste, and has been operational since November 1997. Due to landfill gas migration
beyond the limits of waste, a permanent landfill gas migration control system was installed along the western, northern, and eastern perimeter of the Site. The North Carolina
Department of Environmental Quality - Solid Waste Section (SWS) expressed concern in May 2008 that volatile organic compounds (VOCs) may be migrating beyond the Site
property boundary based on detections in well MW-9. As a result, MW-36 and -36d were installed downgradient of MW-9. Initial groundwater samples collected from MW-
36 and -36d had detections of VOCs above the 15A NCAC 02L .0202 Standards. In order to address groundwater contamination by select volatile organic compounds in the
vicinity of wells MW-6, -6d, -36, and -36d, the SWS approved a Corrective Action Plan that included monitored natural attenuation and institutional controls paired with in
situ remediation by air sparging. The air sparging system was installed in October 2011 and was operational in August 2012.
WASTE TYPES: (X) Liquid () Solid ( ) Sludge () Gas ( ) Unknown ( ) Other, specify:
WASTE CHARACTERISTICS: Check as many as applicable.
WORK ZONES:
(X) Corrosive (X) Flammable ()Radioactive
Exclusion Zone (EZ): The EZ will vary according to the location. Near the drill
(X) Toxic (X) Volatile () Reactive
rig this zone is 1.5 times the mast height.
() Inert Gas () Unknown
Contaminant Reduction Zone (CRZ): Upwind and at least 10 feet from the EZ.
Support Zone: Clean area will be upwind of the work area.
()Other:
HAZARDS OF CONCERN: Check as many as applicable.
FACILITY'S PAST AND PRESENT DISPOSAL METHODS
AND PRACTICES:
(X) Heat Stress CDMS Guideline (X) Noise CDMS Guideline
(X) Cold Stress CDMS Guideline (X) Inorganic Chemicals
() Explosive/Flammable (X) Organic Chemicals
() Oxygen Deficient () Motorized Traffic
Investigative derived waste from previous investigations has been disposed of
on Site by spreading soil cuttings from drilling activities and
()Radiological (X) Heavy Machinery
development/purge water over the ground surface. These practices will be
(X) Biological (X) Slips & Falls CDMS Guideline
continued during the work outlined in this plan.
() Other:
() Other:
This plan incorporates CDM Smith's procedure for: (Click on the relevant topics to download the hazard guideline. Delete irrelevant topics.)
Housekeeping Working Safely Around Geoprobes
Manual Material Handling Hazardous Waste Site Controls
Electrical Safety Working Safely Around Drill Rigs
Tools and Power Equipment
Hazardous Waste Site Decontamination
Page-3 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
Smith
DESCRIPTION AND FEATURES: Include principal operations and unusual features (containers, buildings, dikes, power lines, hillslopes, rivers, etc.)
The North Wake Solid Waste Facility is located at 9029 Deponie Drive in Raleigh, Wake County, North Carolina. The property consists of the closed Unlined,
Subtitle D, and C&D landfills. In addition, there is a recycling convenience center at the landfill entrance. The Unlined Landfill (Site) is located north of the
Subitle D landfill and is surrounded by a chain -link fence and locking gate. The Site is bordered by residential homes to the north and west. Mallinkrodt Inc.
is an industrial facility to the east that manufactures pharmaceuticals and is separated from the Site by wooded areas and grassed fields. Tributaries of the
Neuse River border the Site to the north and south, and flow east to the Neuse River. A gravel road surrounds the landfill area.
SURROUNDING POPULATION: (X) Residential (X) Industrial ( ) Commercial ( ) Rural ( ) Urban OTHER:
HAZARDOUS MATERIAL SUMMARY: Highlight or bold waste types and estimate amounts by category.
CHEMICALS:
SOLIDS:
SLUDGES:
SOLVENTS:
OILS:
OTHER:
Amount/Units:
Amount/Units:
Amount/Units:
Amount/Units:
Amount/Units:
Amount/Units:
Acids
Flyash
Paints
Ketones
Oily Wastes
Laboratory
Pickling Liquors
Mill or Mine Tailings
Pigments
Aromatics
Gasoline
Pharmaceutical
Caustics
Asbestos
Metals Sludges
Hydrocarbons
Diesel Oil
Hospital
Pesticides
Ferrous Smelter
POTW Sludge
Alcohols
Lubricants
Radiological
Dyes or Inks
Non -Ferrous Smelter
Distillation Bottoms
Halogenated (chloro,
Polynuclear Aromatics
Municipal
bromo)
Cyanides
Metals
Aluminum
Esters
PCBs
Construction
Phenols
Dioxins
Ethers
Heating Oil
Munitions
Halogens
Other - specify
Other - specify
Other - specify
Other - specify
Other - specify
Other - specify
Page-4 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM
This document is for the exclusive use
CDM Smith Health and Safety Program
of CDM Smith and its subcontractors
S_ Kim t h
HIGHEST
PEL/TLV
IDLH
Warning
PHOTO
KNOWN
OBSERVED
ppm or mg/m3
ppm or mg/m3
Concentration
SYMPTOMS & EFFECTS IONIZATION
CONTAMINANTS
CONCENTRATION
(specify)
(specify)
(in ppm)
OF ACUTE EXPOSURE
POTENTIAL
Eye & nose irritation, headache,
Benzene
GW
24 ppb
0.5 ppm
500 ppm
61 ppm
giddiness, nausea, fatigue
9.25
Nausea, stagger, slurred speech,
Chloromethane
GW
66 ppb
50 ppm
2,000 ppm
10 ppm
disturbed vision
11.28
Nose, eye irritation, skin blister,
1,4-Dichlorobenzene
GW
16.5 ppb
10 ppm
150 ppm
0.7 ppm
headaches, nausea, jaundice
9.1
1,1-Dichloroethane
GW
310 ppb
100 ppm
3,000 ppm
120 ppm
Skin irritation, drowsiness
11.1
Nervous system depression, irritated
1,2-Dichloroethane
GW
2.6 ppb
1 ppm
50 ppm
26 ppm
eyes, corneal opacity
11.05
cis-1,2-Dichloroethene
GW
100 ppb
200 ppm
1,000 ppm
1.1 ppm
Irritated eyes, CNS depression
10
Eye irritation, headache, nausea,
1,4-Dioxane
GW
26 ppb
20 ppm
500 ppm
12 ppm
drowsiness
9.13
Irritated eyes, nose, throat, flushed
Tetrachloroethene
GW
25 ppb
25 ppm
150 ppm
47 ppm
face & neck, dizziness
9.32
Weakness, tingling & numbness,
Methylene Chloride
GW
680 ppb
25 ppm
2,300 ppm
160 ppm
vertigo, nausea
11.35
Fatigue, confusion, euphoria,
Toluene
GW
1,000 ppb
50 ppm
500 ppm
1.7 ppm
dizziness, headache, tears
8.82
Vertigo, visual disturbance, headache,
Trichloroethene
GW
33 ppb
50 ppm
1,000 ppm
82 ppm
drowsiness
9.45
Vinyl Chloride
GW
41 ppb
1 ppm
Carc.
NA
Weakness, stomach pain, cancer
10
= Not Available
S = Soil
A = Air
NE = None Established
SW = Surface Water T = Tailings
GW = Ground Water SL = Sludge
U = Unknown Verify your access to an MSDS for each chemical
you will use at the site.
W = Waste TK = Tanks SD = Sediment
D = Drums L = Lagoons OFF = Off -Site
Page-5 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
OUM
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
Smith
SPECIFIC TASK DESCRIPTIONS
Disturbing the
TASK - SPECIFIC HAZARDS
HAZARD &
SCHEDULE
Waste?
Medium Hazard
1 Oversight of injection well installation.
Intrusive
Heat stress, heavy machinery, organic/inorganic chemicals,
slips, trips, and falls, biological hazards
Aug-19
pH buffering verification. This will include soil and
Heat stress, organic/inorganic chemicals, slips, trips, and
Low Hazard
2 groundwater sampling to evaluate pH buffering
Non -intrusive
falls, biological hazards
Se 19
p
requirements.
Oversight of biobarrier installation. This will include
Medium Hazard
installation of a potable water supply, a portable tank
Heat stress, cold stress, heavy machinery, organic/inorganic
3 for sodium bicarbonate mixing, an in -line chemical feed
Intrusive
chemicals, slips, trips, and falls, biological hazards
Oct-19
pump, the substrate tank, an injection well manifold,
injection distribution hoses, and injection wellheads.
Oversight of biobarrier injection. This will include an
Medium Hazard
4 immediate -release sodium lactate and sodium
Intrusive
Heat stress, cold stress, heavy machinery, organic/inorganic
bicarbonate solution and a slow -release emulsified
chemicals, slips, trips, and falls, biological hazards
Oct-19
vegetable oil and sodium bicarbonate solution.
Low Hazard
5 Quarterly groundwater sampling.
Non -intrusive
Heat stress, cold stress, organic/inorganic chemicals, slips,
Dec-19 through
trips, and falls, biological hazards
Oct-20
SPECIALIZED TRAINING REQUIRED:
SPECIAL MEDICAL SURVEILLANCE REQUIREMENTS:
OVERALL HAZARD EVALUATION: () High (X) Medium () Low () Unknown (Mere tasks have different hazards, evaluate each.)
JUSTIFICATION: Working around a drill rig can be dangerous. All work will be performed outdoors. Ticks, heat stress, and cold stress are hazards to be
aware of.
FIRE/EXPLOSION POTENTIAL: () High () Medium (X) Low () Unknown
Page-6 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
Smith
PROTECTIVE EQUIPMENT: Specify by task. Indicate type and/or material, as necessary. Group tasks if possible. Use copies of this sheet if needed.
BLOCK A
Respiratory: (X) Not needed Prot. Clothing: (X) Not needed
BLOCK B
Respiratory: () Not needed Prot. Clothing: () Not needed
( ) SCBA, Airline: ( ) Encapsulated Suit:
O e: neaps lated Suit:
( ) APR: ( ) Splash Suit
O ;pl uit
O Cartridge: ( ) Apron:
O
( ) Escape Mask: ( ) Tyvek Coverall or
O y overall or
()Other: () Saranex Coverall
o
() ar overall
O Cloth Coverall:
00 0 r
to rall:
y
Head and Eye: O Not needed O Hi -Visibility Vest
b
Head and Eye: O Not needed O Other:
(X) Safety Glasses: O Other:
o° c
U
O Safety Glasses:
Face Shield: Gloves: () Not needed
Q"
() Face Shield: Gloves: () Not needed
w
(X) Goggles: O Undergloves:
O Goggles: O Undergloves:
M o
c�
(X) Hard Hat: (X) Gloves:
O Other: O Overgloves:
M U
N a?
at: () Gloves:
Over
p"
Boots: O Not needed Other: specify below
_j a�t
PRubbe. ii)ather
(X) Steel -Toe ( ) Steel Shank (X) Tick Spray
j .�
Rubber OLeather OFlotation Device If Over Water
H a
-_` Flo L—on t� ce
( ) Overboots: (X) Hearing Protection
() Overboots: Latex () Hearing Protection
(X) Sun Screen
() Sun Screen
BLOCK C
Respiratory: () Not needed Prot. Clothing: () Not needed
BLOCK D
Respiratory: () Not needed Prot. Clothing: () Not needed
( ) SCBA, e: () Enc sulated Suit:
( ) APR: O . 1 Suit
() Ai () E capsulated Suit:
O ( ash Suit
O Cartrid )
O Escape overall
0
O n:
O ✓e Coverall
O
O Other: Coverall
Q
O ( ex Coverall
O verall:
°O w �
( Coverall:
Head and Eye: O Not needed O Other:
:8 •y
Head and Eye: O Not needed O Other:
o° U
OSafety Glasses:
° U
OSafety Glasses:
OFace Shield: Gloves: Not needed
^ Q ::�
O Face Shield: Gloves: O Not needed
() Goggles: () Undergloves:
U
() Goggles: () Undergloves:
�^
O Ha it: O Gloves:
Ot erglov
�' it
E
Tsar OGloves:
)th Over
v� a
Boots: of i i �c
v� a
ts. n y
OSte S p
rAw�
l �
H a
O Rubber-- O Leatne (f, ation v ver Water
H a
O NUUver (� Learner l rloatatio7 evrce
( ) Overboots: () Hearing Protection
() Overboots: () Hearing Protection
() Sun Screen
() Sun Screen
This health and safety plan form constitutes hazard analysis per 29 CFR 1910.132
Page-7 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CpMmi
CDM Smith Health
and Safety Program of CDM Smith and its subcontractors
Sit h
MONITORING EQUIPMENT:
Specify by task. Indicate type as necessary. Attach additional sheets if needed.
INSTRUMENT
TASK
ACTION GUIDELINES
COMMENTS
Combustible
0-10% LEL No explosion hazard
(X) Not Needed
Gas Indicator
1-2-3-4-5-6-7-8
10-25% LEL Potential explosion hazard; notify SHSC
>25% LEL Explosion hazard; interrupt task/evacuate
21.0% 02 Oxygen normal
<21.0% 02 Oxygen deficient; notify SHSC
<19.5% 02 Interrupt task/evacuate
Radiation
3 x Background: Notify HSM
(X) Not Needed
Survey Meter
1-2-3-4-5-6-7-8
>2mR/hr: Establish REZ
Photoionization
Specify:
0 to 1 ppm: Level D
() Not Needed
Detector
MiniRae3000
1 to 20 ppm: Level D, use detector tubes
eV Lamp
1-2-3-4
>20 ppm: Leave area, Call HSM
Type
Flame Ionization
Specify:
(X) Not Needed
Detector
1-2-3-4-5-6-7-8
Type
Single Gas
Specify:
(X) Not Needed
Type
1-2-3-4-5-6-7-8
Type
Respirable
Specify:
(X) Not Needed
Dust Monitor
If team observes visible concentrations of airborne dust or dry, windy conditions
Type
1-2-3-4-5
that stir dust up, team will leave the area.
Type
Other
Specify:
If team notices unusual odors or irritation of the eye or throat, they will leave the
(X) Not Needed
Type
1-2-34-5
Type
area.
Other
Specify:
(X) Not Needed
Type
1-2-34-5-6-7-8
Type
Page-8 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CDWI
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
Smith
DECONTAMINATION PROCEDURES
ATTACH SITE MAP INDICATING
EXCLUSION, DECONTAMINATION, & SUPPORT ZONES AS PAGE TWO
Personnel Decontamination
Sampling Equipment Decontamination
Heavy Equipment Decontamination
Summarize below or attach diagram;
Summarize below or attach diagram;
Summarize below or attach diagram,
Level D protective clothing removal will be
Reusable sampling equipment should be cleaned
Heavy machinery will be cleaned prior to use and after
done in the following manner:
in the following manner:
each operation.
1. Equipment drop
1. Gross mechanical removal of dirt
1. Wire brush to remove soil
2. Hard hat removal
2. Detergent -in -water wash
2. Clean with high-pressure steam
3. Boot cover removal (if applicable)
3. Tap water rinse
3. Water rinse
4. Glove removal
4. Deionized water rinse
4. Store in a non -contaminated area
5. Hand and face wash
5. Air dry
'Contractor will be responsible to decontaminate their
equipment
( ) Not Needed
( ) Not Needed
( ) Not Needed
Containment and Disposal Method
Containment and Disposal Method
Containment and Disposal Method
Investigative -derived waste will be spread over
the ground surface.
HAZARDOUS MATERIALS TO BE BROUGHT
ONSITE
Preservatives
Decontamination
Calibration
(X) Hydrochloric Acid ( ) Zinc Acetate
(X) Alconox TM ( ) Hexane
(X) 100 ppm isobutylene ( ) Hydrogen Sulfide
(X) Nitric Acid ( ) Ascorbic Acid
(X) Liquinox TM ( ) Isopropanol
( ) Methane ( ) Carbon Monoxide
( ) Sulfuric Acid ( ) Acetic Acid
( ) Acetone ( ) Nitric Acid
( ) Pentane (X) pH Standards
( ) Sodium Hydroxide ( ) Other:
( ) Methanol ( ) Other:
( ) Hydrogen (X) Conductivity Std
( ) Mineral Spirits
( ) Propane ( ) Other:
Page-9 HASP 6/5/2019

HEALTH AND SAFETY PLAN FORM This document is for the exclusive use
CDNI
Smith
CDM Smith Health and Safety Program of CDM Smith and its subcontractors
EMERGENCY CONTACTS
EMERGENCY CONTACTS NAME PHONE
Water Supply
Health and Safety Manager Joe Sabo 857 / 500 - 3636
EPA Release Report #: 800 / 424 - 8802
Project Manager Mathew Colone 919-522-1873
24 Hr. First Aid/Non-Emergency 1-800-3504511, Press 1
Site Safety Coordinator Aaron Weispfenning 919-787-5620
Medical Services
Client Contact Elliott Cornell 919-291-4669
Facility Management
Other (specify)
Other (specify)
Environmental Agency
CHEMTREC Emergency #: 800 / 424 - 9300
State Spill Number North Carolina [phone]
Fire Department 911
SAFETY NARRATIVE: Summarize below
Work will not be performed in thunderstorms or associated bad weather. Prior to purging
Police Department 911
wells or collecting water levels, field personnel will open well and let vent to release any
State Police 911
potential vapor that might have accumulated. CDM
Health Department Wake County 919-250-4516
Smith staff may rely on instruments operated by contractor personnel only upon HSM
Poison Control Center Nationwide 800 / 222 -1222
approval. SHSC will designate evacuation routs at the morning safety meeting.
Occupational Physician Dr. Fred Kohanna 800 / 350 - 4511
If team observes hazards for which they have not been prepared, they will withdraw from
For non -emergency medical services: 1.
the area and call the HSM. CDM Smith personnel will maintain a safe distance from
Call AllOne Health at 1.800.350.4511, PRESS 1, and tell them you are
drilling operations and observe health and safety guidelines for working around heavy
reporting an injury for CDM Smith. Supply requested information.
equipment and or/drill rigs.
2. Follow AllOne Health instructions (e.g., first aid, go to clinic, etc.).
3. After care, follow-up with AllOne at the 1-800 #.
MEDICAL EMERGENCY PHONE
Hospital Name: Duke Raleigh Hospital 919-954-3000
Hospital Address 3400 Wake Forest Road, Raleigh, NC 27609
Name of Contact at Hospital:
Name of 24-Hour Ambulance:
Route to Hospital:
1. Head southeast on Deponie Drive toward Durant Road (0.3 mi)
2. Turn left on Durant Road (1.6 mi)
3. Turn right on Capital Boulevard/US-1 S (6.3 mi)
4. Merge onto 1-440 W/US-1 S via the ramp to Sanford (1.1 mi)
5. Take exit 10 for Wake Forest Road (0.2 mi)
6. Turn right onto Wake Forest Road (0.3 mi)
7. Take the 2nd right onto Executive Drive
HEALTH AND SAFETY PLAN APPROVALS (H&S Mgr must sign each plan)
Prepared by Janelle Farley Date
Total Drive Time:18 minutes
HSM Signature Joe Sabo CSP 6/5/19
Distance to Hospital 9.8 miles
ON
Page-10 HASP 6/5/2019

Smith
HEALTH AND SAFETY PLAN SIGNATURE FORM
updated 9/22/15
All site personnel must sign this form indicating receipt of the H&SP. Keep this original on site. It becomes part of the
permanent project files. Send a copy to the health and safety manager (HSM).
SITE NAME/NUMBER: North Wake Unlined Landfill
DIVISION/LOCATION:
CERTIFICATION:
STH/ RAL
I understand, and agree to comply with, the provisions of the above referenced H&SP for work activities on this project. I
agree to report any injuries, illnesses or exposure incidents to the site health and safety coordinator (SHSC). I agree to
inform the SHSC about any prescription drugs or over-the-counter medication that may cause impairment that I take
within 24 hours of site work.
PRINTED NAME SIGNATURE DATE
Page-11 HASP 6/5/2019

ALINE.
SRII�1
AllOne Health's Firs[ AldMon-Emergency Services will
help when an injury occurs. Available 24!!.
CJ7811 a'itlRBs1
will be trensferretl a a metliul professional. ae preparetl
fo Provitle:
• Name/confect information/location
Supervisor/manager inbrmetbn
• Whelberyou ere with CAM Canstmciorslathar
CAM SmiN unit
• scnpfion f Injury &any releveni existing metlical
i emergeneiez, tlie18111or esaiztancel
AL�NE
For Job -Related First
Aid/Non-Emergency
Medical Services
�mith
i