NC0087858_Plan of Action_20020415

NPDES DOCUHENT SCANNING: COVER SHEET
NC0087858
Equipment and Supply site
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
--
Plan of Action
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
April 15, 2002
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Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
4507 Highway 74 West
Monroe, North Carolina
EPA ID No. NCD 986 194 421 \,
Prepared For:
Equipment & Supply, Inc.
4507 Highway 74 West
Monroe, North Carolina 28110
Prepared By:
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina 28112
and
Moore Engineering :and Associates
313 North Main Street, Suite 200
Monroe, North Carolina 28112
April 15, 2002

Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
4507 Highway 74 West
Monroe, North Carolina
EPA ID No. NCD 986 194 421
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina 28112
[phone] Phone and Fax
yJ
Richard L. Harmon, P.G.
//A4
Prepared For:
Equipment & Supply, Inc.
4507 Highway 74 West
Monroe, North Carolina 28110
Prepared By:
Moore Engineering and Associates
313 North Main Street, Suite 200
Monroe, North Carolina 28112
[phone]
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Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
4507 Highway 74. West
Monroe, North Carolina
EPA ID No. NCD 986 194 421
TABLE OF CONTENTS
Section Page
1.0 Introduction 1
2.0 Surrounding Property Usage 2
3.0 Hydrogeology 3
3.1 Regional Geology 3
3.2 Local Geology . 3
3.3 Site Hydrogeology 4
4.0 Site Conditions 5
4.1 Volatile Organic Compounds Source Evaluation 5
4.2 Contaminant Distribution in the Groundwater 7
5.0 Exposure Potential Assessment 7
5.1 Primary Compounds of Concern 7
5.2 Potential Receptors 9
6.0 Revised Selected Remedial Alternative 9
6.1 Proposed Schedule 10
7.0 References 11

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Table 1
Table 2
Table 3
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
4507Highway 74 West
Monroe, North Carolina
EPA ID No. NCD 986 194 421
TABLE OF CONTENTS (Continued)
LIST OF FIGURES
Site Location Map
Site Layout and Surrounding Property Usage Map
Shallow Potentiometric Map
Geologic Cross Section Location Map
Hydrogeologic Cross Section A -A'
Hydrogeologic Cross Section B-B'
Drainage Ditch Soil Samples Analytical Results
March 20, 1995 Soil Test Boring Locations & Analytical Results
Summary of Groundwater Analytical Results
Proposed Recovery Well Location Map
Proposed Recovery Well Schematic
Conceptual Groundwater Treatment System Schematic
LIST OF TABLES
Depth to Water Measurements, January 29, 2002
Analytical Results Summary, January 2002 Groundwater Sampling Event
Summary of Historical Groundwater Analytical Results, Monitor Well MW-1
LIST OF APPENDICES
Appendix A January 2002 Groundwater Analytical Results
ii

Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater Equipment & Supply,est Inc.
4507 Highway
Monroe, North Carolina
EPA ID No, NCD 986 194 421
1.0 Introduction
Carolina Department of Environment and Natural Resources t
In a January 16, 2002 letter, North P. , , these
Supply, Inc. provide additional information regarding 17, 20ed
(DENR) requested Equipment & fluid vapor recovery (AFVR), presented in the August On
00
remedial alternative, aggressive P Resolve Environmental Services, P.A. (Resolve).• •
Revised Corrective Action Plan prepared by retained Harmon Environmental to assist in revising
January 23, 2002, Equipment & Supply,Inc. '°'� tion Plan.
the August 17, 2000 Revised Corrective A
Equipment & Supply, inc. operates an aviation equipment manufacturing facility at 4507 Highway. Figure 1 presents the location of the facility depicted on an
Carolinapan a map of
,�, 74 West in Monroe, North Survey(USGS) 7.5 minute topographic quads gl
excerpt of the United States Geologict& Supply, inc. received correspondence from the
23, 1991, Equipment PP
the region. On Augusto
the facility had been inspected on August 6,1991. The correspondence reportedly
pm DENR indicating cited a potential release of metals -impacted process wastewater to the environment. The primary
area of concern was noted to be the discharge of wastewater from an electroplating room sump into
a small surface water ditch located on -site.
1 Inc. retained Aqua►terra, Inc. to
correspondence, Equipment & Supply, uac. to
As a result of this DENR P release. Between April 1992 and September 1994, Agom the
ra
� assess the nature of the reported analyses of 39 soil samples from conducted a site assessment which included the collection and -1 MW-2, MW-3, MW-3i
ditch and the installation of five monitor wells (MW_5 at the site. The locations of
base of the drainage
and five piezometers (PZ-1, PZ-2, PZ-3, PZ-4 and PZ-5)
MW-4)
these monitor wells are depicted on Figure 2.
removal of approximately 56 cubic yards of metals`
`� Aquaterra also oversaw the excavation and ortedl
• h in August and September 1992. This material was reportedly
impacted soil from the drainage ditch �
,., disposed of at the Laidlaw secured landfill in Pinewood, South Carolina.
. ,retained Resolve to assist with assessment and
In November 1994, Equipment & Supply, Inc. Resolve assisted Equipment & Supply, Inc. with
t.,, remediation of the site. Between 1994 and 2001, the drainage ditch.
remediating the remaining metals -impacted soil
Management Unit (HWMU), groundwater
Although not resulting from the Hazardous Waste Manag medicated the presence of volatile
+•�, Al ugh
samplingactivities associated.vvnththe assessment of the HWMU samples collected from monitor
organic
nicOCs primarily trichloroethene (TCE), in p ected Groundwater
organic compounds (VOCs), •
these results, Resolve submitted a Trichloroethene-Affected well MW-1 • Based on
Harmon Environmental
Revised Corrective Action Plan 1 615 Bruce Thomas Road
FM Volatile Organic Compounds Impacted Groundwater olin
1 Inc. Aprilrth1 a, ina
Equipment Supply, Monroe, Nrth Caroa
Monroe, North Carolina

,m Assessment Plan to the DENR in January 1995.
The activities outlined in the January 1995 Plan
p
were implemented immediately and a report entitled Trichloroethene Source Investigation, Soil
Quality Assessment was submitted
to the DENR by Resolve in July 1995. This report included a
and a soil assessment to determine the source of the VOCs. The
"'� summary of employee interviews TCE was previously used at
results of this investigation indicated that while a material containing be documented.
the Equipment & Supply, Inc. facility for a brief period, no release could
Subsequent to
In May 1996, Res
olve Sub
submitted a Groundwater Assessment Report to the DENR. advancement of two
of the Groundwater Assessment Report, Resolve oversaw the advancproperty
the submissiong and MW-9) on the Martin MariettaP P
OM
additional shallow water table monitor wells (MW-m complete the groundwater plume delineation (See
contiguous to the Equipment & Supply, Inc. site to c ve Action Plan in March 2000 to remediate the
,�„ Figure 2). Resolve also submitted a Revised Correcii
VOC impacted groundwater at the site.
oundwater samples from the fifteen
MR In January 2002, Harmon Environmental personnel collected gr u 1y, Inc. facility. The analytical
Equipment & S pp
monitor wells and piezometers on and around the Equipthe analytical data associated with historicp
results associated with these groundwater samples andcompounds impacted groundwater
PM groundwater sampling events, indicate that the volatile organic
plume appears to be limited to the shallow groundwater in the vicinity of monitor wells MW-1, MW-
6 and MW-8.
111150
2.0 Surrounding Property Usage
Inc.is situated on a 43-acre
Equipment & Supply, tract located on the southwest side of U.S.North Carolina. This tract is owned by
Highway 74, within the City of Monroe, in Union County, Inc. The Equipment & Supply, Inc.
Mr. Andrew Adams, the president of Equipment & Supply, Equipment & Supply, Inc. began
facility occupies approximately 17-acres of the proPed�three out buildings have been utilized
operations at the site in 1971. The main facility metal arts for the aerospace industry.
exclusively to warehouse, restore and fabricate specialty P
The four buildings on the property include an approximately 38,000 square -foot office and
an approximately 10,800 square -foot concrete paneled warehouse building,
manufacturing facility, pp equipment
approximately 16,800 square -foot corrugated metal building comprised of two w house
an appro Y approximately 32,000 square -foot assembly buildings, the former plating building and an aPPand shipping and receiving driveways are
,., building. Lawn areas, employee and visitor parking lots, area is located southwest of the buildings.
located around these buildings. An exterior parts storage
The layout of the facility is presented in Figure
2.
A portion of the boundary
between the site and the Martin Marietta facility is defined by an unnamed
Stewarts Creek that drains toward the northeast through a culvert extending beneath he
tributary to dewatering operation
Highway 74. This unnamed tributary receives water from the on -going from the west toward
is subdued, generally sloping
Martin Marietta -rock quarry. The site topography the east to the point74.
where the unnamed tributary of Stewarts Creek crosses under Highway
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
2
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

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3.0 Hydrogeology
3.1 Regional Geology
The Equipment & Supply,Inc. site is located within the Carolina Slate Belt of the Piedmont
Ph siogmP hic Province. The Carolina Slate Belt consists of low-grade metamorphosed volcanic and
y
sedimentary rocks situated in the east -central portion of the Piedmont Province of North Carolina.
Coastal Plain sediments overlap the Carolina Slate Belt to the east. The Charlotte Belt, which
consists of higher -grade metamorphic and igneous rocks, borders the Carolina Slate Belt to the west.
The Carolina Slate Belt consists primarily of laminated and non -laminated metamorphosed peltic
rocks. Rock color typically varies from bluish -grey when fresh to brown and reddish -orange when
weathered. When present, laminated bedding planes are typically well developed and exhibit
beddingplane cleavage. Igneous intrusions are most common as dikes with general mineralogy of
voids. The metagabbro is
,WR plagioclase, clinopyroxene, and chlorite with biotite and quartz filling and mineralogy.a me
generally xenoblastic, but abundant sericite and epidote obscure structure
Quartz veins are present throughout the Carolina Slate Belt. These veins (i.e. dikes and sills) are
typically intruded into fractures in the country rock. Large muscovite flakes are commonly seen
rock at the time
along these intrusions, possibly indicating recrystalization of the country
intrusion. The quartz is usually milky in appearance (Randazzo, 1972).
The Gold Hill Shear Zone is a major structural feature present along the western boundary of the
Carolina Slate Belt. The Gold Hill Shear Zone is thought to be a thrust fault generally trending
approximately north 15 degrees east and extending southward from near the town of Southmont in
Davidson County, North Carolina to the eastern edge of Indian Trail in Union County, North
Carolina. Previous investigations by others indicated the rocks along the western margin of the shear
zones are characterized by higher ranking metamorphism, including the occurrence of slate and
phyllite. Local fault planes, quartz veins and minor joints are also commonly associated with this
Y
major shear zone trend (Randazzo, 1972; The Geologic Map of North Carolina, 1985).
AIM
3.2 Local Geology
Boring logs were prepared in conjunction with the advancement of the eleven monitor wells and five
piezometers at the Equipment & Supply, Inc. facility. These logs were prepared by Aquaterra
theand
Resolve personnel during the advancement of the monitor wells and piezometers. Based
on boring logs, the lithology underlying the Equipment & Supply, Inc. facility appears to be relatively
uniform. In general, approximately 6-inches of top soil was present across a majority of the site.
Underlying the top soil was a yellowish to orangish brown, clayey silt to silty, clay material
apparently
weathered in -place from the underlying parent rock. This clayey silt horizon ranged in
Underlying this saprolite material was
thickness from less than one foot to 10.5-feet across the site. UnThe contact between the partially
a layer of greenish -grey partially weathered phyllite rock. from approximately 2-feet
weathered rock and the underlying phyllite was observed to range in depth
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
3
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

H■R
AMR
Min
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below grade in the vicinity of monitor well MW-9 to greater than 25-feet below grade in the vicinity
h luteparent rock on -site has been described as a dense, dry, green
of monitor well. MW-3 • The P Y P
to grey argiliite or phyllite.
3.3 Site Hydrogeology
& Supply,Inc. facility is typical of the composite weathered
The aquifer underlying the Equipment
within the Piedmont of North Carolina. The aquifer is unconfined,
fractured rock aquifers common the water table surface
underphreatic, or water table conditions. Under these conditions,
existing low -permeable layers between
equilibrium with atmospheric pressure and isnot confined groundwater at
is in eqThe average depth to
the surface of the water table and the surface of the ground.the January 2002 groundwater sampling
the Equipment & Supply, Inc. site, as measured during
event, was approximately 5.8-feet below the ground surface.
icall recharged by direct infiltration from
Groundwater under water table conditions is tYP geologic media to its ultimate discharge
precipitation. The water flows through the pore space
uon the rface intersects the surface of the ground. As a
in topographic low regions where the water table etric surface expressed by water table aquifers
result of these typical flow patterns, the potentsom
typically appears as a subdued replica of the topography.
A summary of the water levels collected from the monitor well and piezometer network between
u 31 2002 is presented in Table 1. Figure 3 presents a potentiometn9
January 29, 2002 and January
surfacec
based on the water level measurements collected between Janow
map of the water table component of groundwater
and January 31, 2002. This map indicates the shallow horizontal component of hydraulic gradient
The shallow horizontal
is generally to the southeast across the shefoot (ft/ft) in the vicinity of monitor well MW -1 to 0.02
was calculated to range from 0.005 feet per
ft/ft in the vicinity of monitor well MW-8.
2002 groundwater
vertical component of hydraulic gradient was calculated from the Jan y 2002 Vround and
The P
elevation data as 0.005 ft/f t downward in the vicinity of monitor well cluster
0.
019 ft/ft downward in the vicinity of monitor well MW-3/MW 3i.
A plan view of two transects
(A -A' and B-B') across the site is presented as Figure 4. The
associated geologic cross-sectionsalong A A' .and B-B' are presented in Figure 5 and Figure 6,
respectively. These cross -sections
- ections illustrate the horizontal and vertical components of the hydraulic
gradient as calculated for these transect lines.
• (slug)tests
terrapersonnel conducted single well hydraulic conductivity
In September 1994, Aqua 3MW-4 and psezometer PZ-4. Based on these tests,
on monitor wells MW-1 � MW-2, MW"3 � �- i ' onion of the aquifer to be
Aquaterra concluded the average hydraulic conductivity in the shallow
value appears to be high
q ftld This average hydraulic conductivity on the order of 1.34 feet per day ( ) • tests conducted by Harmon Environmental
relative to the results of constant discharge (pump) Su 1 ,Inc. facility. Typical hydraulic
personnel at other sites in the vicinity of the Equipment & pp Y
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
4
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

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M
conductivity values associated with pump tests conducted in this portion of Union County ranged
from 0.2 ft/d to 0.6 ft/d.
Pump tests are generally considered to be a more accurate method of evaluating aquifer
characteristics. As a result, Harmon Environmental has calculated the groundwater flow at the site
based on an estimated hydraulic conductivity of 0.4 ft/d as suggested by Resolve in the August 17,
2000 Revised Corrective Action Plan.
Based on the following estimated values, the shallow horizontal component of groundwater flow
can be estimated using the equation:
Vh=K *dh/dl
ne
Where Vh = the horizontal component of groundwater flow velocity in feet per day (ft/d)
Kh = the horizontal component of hydraulic conductivity in feet per day (ft/d)
0.4 ft/d (8/17/00 Revised CAP, Resolve)
dh/dl= the shallow horizontal component of gradient in feet per foot (ft/ft)
0.005 ft/ft to 0.02 ft/ft (1/29/02 to 1/31/02 data)
= estimated effective porosity
10% (8.18.00 Revised CAP, Resolve)
Based on the above assumed values the horizontal component of the groundwater flow velocity at
the Equipment & Supply, Inc. facility is estimated to range from 0.02 ft/d (7.3 ft/year) in the vicinity
of monitor well MW-1 to 0.8 ft/d (292 ft/year) in the vicinity of monitor well MW-8.
4.0 Site Conditions
A November 1994 groundwater sampling event unexpectedly indicated the presence of VOCs in the
groundwater sample collected from monitor well MW-1. As a result of these findings, assessment
activities designed to evaluate the source and extent of potentially VOC-impacted soils and
groundwater was initiated at the site. These activities are summarized in the following sections of
this report.
4.1 Volatile Organic Compounds Source Evaluation
As indicated in the Closure Plan for RCRA Regulated Sump, Discharge Pipe and Surface Water
Ditch report prepared by Resolve in January 1995, Resolve collected seven shallow soil samples
from the center line of the surface water drainage ditch and in the vicinity of the PVC discharge pipe.
No VOCs were detected in these samples. The drainage ditch sample locations and associated
analytical results originally presented in the January 1995 report are summarized in Figure 7.
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
5
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

4.
As indicated in the Trichloroethene Source Investigation, Soil Quality Assessment, prepared by
Resolve on July 6, 1995, prior to continuing soil assessment and remediation activities, Smith,
Helms, Mulli
ss and Moore, L.L.P. representatives interviewed past and present Equipment &
Supply,
Inc. personnel to determine potential source areas for the VOCs detected in the groundwater
These interviews established that Equipment & Supply, Inc. purchased one 55-gallon drum
containing TCE in the mid-1980's after receiving a work order for approximately 700
materialg
J
hydraulic jacks. An employee that had formerly used TCE while working for another comp a
Yed
suggested that use of this material to clean the jacks prior to painting. The drum was forBuilding.oThe
cleanthe 'jacks.
adjacent to the Duke Power transformer immediately northwest of the former Plating
contents of the drum were transferred into smaller open top containers as needed to the open
After the jacks were assembled, Equipment & Supply, Inc. personnel dipped them into one, a
topped containers and then stored them on racks or a cart to air dry. All employeesexcept
former employee that had been laid -off, said that the cleaning operation was performed in Equipmenntt
Assembly Building No. 1 (see Figure Z)., Equipment Assembly Building No. 1 is a m
prefabricated building constructed on a concrete floor slab.
No employee (past or present) recalled using the TCE containing material for purposes other than
cleaning the jacks. Also, an employee who had responsibility for the plating facility affirmativelyr
stated that TCE containing material was never used in the plating operation or to prepare parts
plating. . None of the employees interviewed recalled if spent or virgin TCE containing material
remained after the hydraulic jack project was completed, but, the interviewed employees commented
that this material evaporated very quickly. No one interviewed was aware of any spills of releases
of TCE containing material at the facility.
As discussed in the August 17, 2000 Revised Corrective Action Plan, based on the results of these
interviews, on March 20,1995,14 soil test borings were advanced at the Equipment & Supply, Inc
facility by McCall Brothers, Inc. under the oversight of Resolve personnel (Figure 8). The borings
were advanced to depths ranging from seven to nine feet. As advanced, soil samples were collected
from each boring on 2.5-foot intervals from the surface of the ground to each respective boring
terminus and field screened for the presence of VOCs with a flame ionizing organic vapor deter
r
(FID). Based on the field screening results, selected soil samples were prepared of laboratory
analysis.
TCE was detected in the soil sample collected from the boring SB-2 at a depth interval of 0 to 2 feet
below grade at a concentration of 7 micrograms per kilogram (p.g/kg). Additionally, 550 IIg/kg of
carbon disulfide was detected in the soil sample collected from boring SB-12 at a depth of 3 to 5 feet
below grade. No targeted VOCs were detected in the remaining soil samples collected during the
March 1995 investigation.
As indicate
d in the August 17, 2000, Revised Corrective Action Plan, prepared by Resolve, there is
no discernable on -site source area for the VOCs detected in the groundwater samples collected from
monitor well MW-1.
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
6
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
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4.2 Contaminant Distribution in the Groundwater
A summary of the analytical results associated with the January 2002 groundwater sampling event
are presented in Table 2 and on Figure 9. As indicated by these data, the VOC impacted
groundwater is primarily limited to the shallow groundwater in the vicinity of monitor wells MW-1,
MW-6 and MW-8.
The northwestern (up gradient) extent of the impacted groundwater appears to have been defined by
groundwater sample analytical data associated with monitor well MW-7. The southeastern (down
gradient) extent of the plume appears to have been defined the groundwater sample analytical data
associated with monitor well MW-9 and the southwestern and northeastern (side gradient) sides of
the plume appear to have been defined by the analytical data associated with groundwater samples
collected from piezometer PZ-1 and monitor well MW-5.
The vertical extent of the VOC impacted groundwater appears to have been defined by the analytical
results associated with groundwater samples collected from monitor well MW-1A.
5.0 Exposure Potential Assessment
5.1 Primary Compounds of Concern
As indicated on Table 3, the analytical results associated with groundwater samples collected from
monitor well MW-1 have routinely indicated the presence of various VOCs. The prim
compounds detected in groundwater samples collected from the monitor wells associated with
Equipment & Supply, Inc. site are discussed below.
Trichloroethene
fart TCE is a clear, colorless liquid with a chloroform like odor commonly used in dry cleaning and as
an industrial solvent for degreasing and drying metals and electronic parts. TCE is a common
extraction solvent for oils, waxes, fats, and is used for removing caffeine from coffee. TCE is also
used as a refrigerant and heat exchange liquid, and to dilute paints and adhesives.
The Occupational Health and Safety Administration (OSHA) has defined TCE as carcinogenic and
established a time weighted exposure limit of 50 parts per million (ppm) for inhalation. Common
symptoms associated with exposure to TCE include headaches, vertigo, nausea, eye irritation
and
dermatitis.
The North Carolina Groundwater Quality Standard for TCE, as established in North Carolina
Administrative Code, Title 15A, Subchapter 2L (15A NCAC 2L), is 2.8 ug/l.
Common aerobic and anaerobic microorganisms readily degrade TCE via a sequential
dehalo genation process into cis-1,2-dichloroethene, andtrans-1,2-dichloroethene and vinyl chloride.
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
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Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

01114
e
fail
conditions,CO CI' and H2O are the principal degradation product. Under anerobic
Under aerobic 2, ens de de TCE to chloroethane, methane,
conditions, nonmethanogenic ferrnenters and methano�
1,1-dichloroethene, 1,2-dichloroethene and vinyl chloride.
1, 2-Dichloroethene (total)
total (1,2-DCE) is an analytical value for the combination of cis-1,2-
12-Dichloroethene (total)
trans-l2-dichloroethene. 1,2-DCE is typically a colorless liquid or gas with an
dichloroethene and � ingredient in
ether like odor commonly used as a solvent for fats and phenols. 1,2-DCE is also an
perfumes, and a co
mmon low temperature solvent for sensitive substances such as caffeine. Both
cis-1,2-DCE and trans-1,2-DCE are common degradation products of TCE.
2 DCE of 200 ppm
has defined a time weighted average exposure limit by inhalation for 1, , - dangerous to
OSHA
ei t hour eriod, with a concentration of 4,000 ppm defined as immediately �gerous t s
over an eight P
•L . Common symptoms of exposure include irritated eyes and central
life and health(ID H)
system depression.
The North Carolina Groundwater Quality Standard for 1,2-DCE as established in 15A NCAC 2L is.
70 4g/1.
nditions 1,2-DCE is known to biodegrade into vinyl chloride. Carbon monoxide,
Under anaerobic co formac acid and hydrochloric acid are reported byproducts of this degradation.
1,1-Dichloroethene
1,1-Dichloroethene (,1-1 is typically a clear, colorless liquid with a mild sweet odor resembling
DCE )
chloroform. 1,1-
DCE is used in the production of synthetic fibers, adhesives, and resins and is a
common degradation product of TCE.
mover
OSHA has defined a time weighted average exposure limit by inhalation for 1,1-DCE ofpII
eight hour period. Common symptoms of exposure include irritated eyes and central
an gh
system depression.
The North Carolina Groundwater Quality Standard for 1,1-DCE as established in 15A NCAC 2L
is 7.0 ug/1.
Under anaerobic conditions,1,1-DCE is known to degrade into, vinyl chloride.
Vinyl Chloride
Vinyl chloride is typicallya colorless liquified compressed gas with a faint sweet odor commonly
used to manufatture polyvinyl inyl chloride and adhesives for plastics, and to extract solvents. Vinyl
chloride is a common degradation product of TCE, 1,1-DCE and 1,2-DOE.
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
8
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

• OSHA has defined vinyl chloride as a hazardous material with an established time weighted
exposure limit by inhalation of 1 ppm over an 8 hour period. Common symptoms associated with
exposure to vinyl chloride include weak abdominal pain, gastrointestinal bleeding and pallor
▪ cyanosis of the extremities.
The North Carolina Groundwater Quality Standard for vinyl chloride as established in 15A NCAC
2L is 0.015 , tg/l.
Under both anaerobic and aerobic conditions, vinyl chloride has been shown to degrade to CO2, cr,
�, and H2O. This degradation is reportedly enhanced by the presence of nutrients including methane,
methanol, ammonium, phosphate and phenol.
5.2 Potential Receptors
f•► To evaluate the risks associated with these VOCs in the groundwater at the site, Harmon
Environmental reviewed potential receptors both on -site and on surrounding properties. The three
primary routes of exposure to the VOCs of concern include dermal contact, ingestion and inhalation.
0114 As indicated in Section 4.2 of this Plan, the VOCs detected on -site appear to be limited to the
shallow groundwater. Based on the depth of the impacted groundwater at the site, exposure to this
material during routine on -site activities is not a concern.
The City of Monroe provides potable water for this area of Union County. During previous
assessment activities, Resolve personnel documented the presence of a water supply well at the
residence located across Highway 74 from the Equipment & Supply, Inc. site. As indicated in the
August 17, 2000 Revised Corrective Action Plan prepared by Resolve, the use of this well is
unknown. Monitor well MW-2 and piezometer PZ-3 are located between the VOC plume and this
observed water supply well. Historical analytical data associated with groundwater samples
collected from these points indicate the plume has not migrated in this direction.
Surface water in the vicinity of the Equipment & Supply, Inc. facility consists of the unnamed
tributary to Stewarts Creek and a retention pond associated with the Martin Marietta quarry
dewatering activities. Both of these surface water features are located south of the Equipment &
Supply, Inc. facility. Based on the excerpt from a USGS topographic map of the region presented
as Figure 1, the water level in the pond is approximately 20 feet above the ground level in the
vicinity of the plume. The hydraulic gradient inferred by this elevation difference would impede
migration of the VOCs from the vicinity of the plume to the pond.
6.0 Revised Selected Remedial Alternative
To reduce the potential for further off -site migration of the VOC-impacted groundwater and to
initiate remediation of the plume, Harmon Environmental proposes to construct a groundwater
recovery and treatment system at the site. The VOC-impacted groundwater will be recovered via
a series of recovery wells and treated by air stripping technology then discharged to the unnamed
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
9
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

011011
• Creek through a National Pollution Discharge Elimination System (NPDES)
tributary of Stewarts �
permitted outfall.
. wells at the Equipment &
Harmon Environmental proposes to construct two groundwater recovery recovery ewill be
Supply, inc. facility at the approximate locations depicted on Figure 10. The n of 75 feet
PP Y�
6-inch diameter wells screened from the surface of the water table to a termination depthtwo foot by
deepeach. These two wells will be completed flush with the surface of the ground
two foot steel vaults and hinged lids for access (Figure 11).
with four -inch diameter QED Hammerhead® Pumps, or
Each recovery well will be equipped e uivalen to transfer groundwater from the well to the treatment system through
double walled
q �
subgrade piping or tubing.
The recovered groundwater will be delivered to an influent tank located within the containment dike
thegroundwater treatment system. From the influent tank, the recovered groundwatere
,�,, surrounding nor to discharge
will be transferred to the air stripping unit for treatment then to the effluent tank p of the proposed
via the proposed NPDES permitted outfall. Figure 12 presents a general schemata P P
P P
0.4 treatment system configuration.
MIA
fug
6.1 Proposed Schedule
Following approval of this Revise
d Corrective Action Plan by the DENR, required permits will be
obtained prior to g constructin the system. The permitting process is anticipated to require
approximately 90 days.
permits, construction will be initiated.. Construction of the system is
Upon receipt of the required
re uire 30 to 60 days, depending on contractor availability. Following completion of
anticipated toq will include a pump test
the construction activities, system start-up will begin. The system start-up
sp test, Harmon
of the aquifer during the first two.weeks of operation. During this
and inspect the system.
Environmental personnel will routinely visit the site to measure wmateris functioning properly, site and
Once it has been determined that the recovery and treatment
system
s ,s approved Sampling an,aA,nalysis
system monitoring will be initiated in accordance with the facility' pP
Plan.
After a period of two years, the effectiveness of the system will be evaluated.
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
10
Harmon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 1 S, 2002

ROM
COL
MIL
7.0 References
Semiprini, Lewis., Insitu Bioremediation of Chlorinated Solvents, Department of Civil Engineering,
Oregon State University, Corallis, Oregon. Presented in the Environmental Health Perspectives
Supplement Biodegradation. Volume 103. Supplement 5. June 1995. National Institutes of Health.
National Institute of Environmental Sciences.
Zinder, Stephen H. and Gossetts, J. M., Reductive Dechlorination of Tetrachloroethene by a High
Rate Anaerobic Microbial Consortium, Department of Microbiology and Civil Environmental
Engineering, Cornell University, Ithaca, New York. Presented in the Environmental Health
Perspectives Supplements. Biodegradation. Volume 103. Supplement 5. June 1995. National
Institutes of Health. National Institute of Environmental Health Sciences.
Montgomery, John H., Groundwater Chemicals Field Guide. Selected Pages. Lewis Publishers
1991.
Resolve Environmental Services, P.A., Groundwater Assessment Report of the Equipment & Supply,
Inc. , Monroe, North Carolina. May 1996.
Resolve. Environmental Services, P.A., Trichloroethene Source Investigation, Soil Quality
Assessment, Equipment & Supply, Inc., 4507 Highway 74 West, Monroe, North Carolina., July 6,
1995.
Resolve Environmental Services, P.A., Revised Corrective Action Plan, VOC-Impacted
Groundwater, Equipment & Supply, Inc., Monroe, North Carolina., August 17, 2000.
Aquaterra, Inc., Site Characterization Report, Equipment & Supply, Inc. Site, Monroe, North
Carolina, February 18, 1994.
Aquaterra, Inc., Groundwater Sampling Plan, Equipment & Supply, Inc. Site, Monroe, North
Carolina, February 18, 1994.
North Carolina Geologic Survey, Geologic Map of North Carolina; 1985
Randazzo, F., Petrography and Stratigraphy of Carolina Slate Belt, Union County, North Carolina,
1972
Revised Corrective Action Plan
Volatile Organic Compounds Impacted Groundwater
Equipment & Supply, Inc.
Monroe, North Carolina
11
Hannon Environmental
615 Bruce Thomas Road
Monroe, North Carolina
April 15, 2002

Figures

SOURCE: MAPTECH.COM
0
2000
4000
HARMON ENVIRONMENTAL
615 BRUCE THOMAS .ROAD
MONROE. NORTH CAROLINA 28112
[phone] PHONE & FAX
FIGURE 1.�
SITE LOCATION MAP
EQUIPMENT & SUPPLY, INC.
4507 HIGHWAY 74 WEST
MONROE, NORTH CAROLINA
9M0"OOl 10-60£

ANDREW J. ADAMS
(UNDEVELOPED)
RESIDENTIAL
COMMERCIAL
(USED CAR SALES)
SWEET UNION
FLEA MARKET
Pz-s p
HIGHWAY 74
IF
WATER DRAINAGE DITCH
PZ-4p
EQUIPMENT
ASSEMBLY
BUILDING ko.1
BORON CLAY PRODUCTS
PZ-1 p
PAWING /
ROOM
FORMER
PLATING
BUILDING
PZ-2 p
APPROXIMATE LOCATION OF
FORMER SUMP
1
MW-8
• TAW-8
/ MW-9
EQUIPMENT
ASSEMBLY
BUILDING No.2
MARTIN MARIETTA
AGGREGATES
LEGEND
P� 4 PIEZOMETER LOCATION
• MONITOR WELL LOCATION
MW-2
,
APPROXIMATE LOCATION OF
SURFACE WATER DRAINAGE
APPROXIMATE LOCATION OF
FORMER SUMP
9 0
BASE MAP PROVIDED BY AQUATERRA REPORT DATED SEPTEMBER 29. 1994 AS REVISED BY RESOLVE ENVIRONMENTAL. SERVICES, P.A. APPROXIMATE SCALE IN FEET
W'sns-nIC.APnr..9 nw
tW'J
rimmn
N Ca�.a�V
4 .4a
• 0z
�o V] o
rn
--1 --1 --{ --1 ---E ..I -..E 1 E - d

PZ- A
(94.41)
EQUIPMENT
BUILDING No.1
4 01� (9
A
NOTES:
POTENTIOMETRIC CONTOURS PRESENTED GROUNDWATER ELEVATIONSCALCULATED
BASED
S ED
ON INTERPOLATION BETWEEN
MEASURED IN THE MONITOR WELL NETWORK BETWEEN JANUARY 29. 2002
AND JANUARY 31. 2002 BY HARMON ENVIRONMENTAL PERSONNEL.
THE ELEVATIONS PRESENTED HEREIN ARE BASED ON AN ARBITRARY ON -SITE DATUM.
/,
1.
A(94)( 15)/
0 •
• 0 (EAR
(93 87� EQUIPMASS£MBLLYYr
PMNMNG BUILDING No.2
ROOM /•
.
FORMER
!PLATING
BUILDING
BASE MAP PROVIDED BY AQUATERRA REPORT DATED SEPTEMBER 29. 1994 AS REVISED BY RESOLVE ENV ROM ENTAL SERVICES. P.A.
LEGEND
PZ-4
PIEZOLIETER LOCATION
MONITOR WELL LOCATION
MW-2— APPROXIMATE LOCATION OF
SURFACE WATER DRAINAGE
GENERALIZED SHALLOW
HORIZONTAL GROUNDWATER FLOW
(92.48) RELATIVE
GROED GROUNDWWEEN ATER
ELEVATION
MAND 1/31/02 BY HARMON ENVIRONMENTAL
PERSONNEL.
RELATIVE GROUNDWATER
ELEVATION CONTOUR
APPROXIMATE SCALE IN FEET
n9-n1CAPRR3 nW
Z 5 a' 8
43
Z §oU1
0R5
1m
u�
(10
Z CEIZ
O
21 v
E 1 1 1 1 1 1 E 1 1 E E E 1 E E 1 [

309-01 CAPF1C4 DWG
PZ-5
ii1
OFFICES
HIGHWAY 74
HIGHWAY 74
MANUFACTURING
BUILDING
A
PZ-4
SOURCE: REVISED CORRECTIVE ACTION PLAN. RESOLVE. AUGUST 17. 2000
COMMERCIAL
(USED CAR SALES)1
PZ-3
BUILDING
MW-4
WARE-
HOUSE
EQUIPMENT
ASSEMBLY I.
BUILDING
No. 1
FORMER
.PLATING
MW-ice
MW-3 PZ-2
MW-5
P�1/
PAINTING /
ROOM
MW-8
EQUIPMENT
ASSEMBLY
BUILDING No.2
MW-9
6•
LEGEND
Q PIEZOMETER LOCATION
PZ-4
O MONITOR WELL LOCATION
MW-2
' APPROXIMATE LOCATION OF
SURFACE WATER DRAINAGE
A A' GEOLOGIC CROSS-SECTION UNE
2 0
APPROXIMATE
SCALE IN FEET
E E [ E E E E E E E E E E E [ E

309-01CAPFIG5.DWG
100
90
BO
70
80
50
40
30
20
10
0
NOTES:
THE VERTICAL EQUAL POTENTIAL. CONTOURS PRESENTED HEREIN WERE CALCULATED
ON BETWEEN THE RELAINE GROUNDWATER ELE
MEASURED INTHEMONITOR WELL NETWORK BETWEEN JANUARY 20, 2002VNS
AND JANUARY 31, 2002 BY HARMON ENVIRONMENTAL PERSONNEL.
TILE ELEVATIONS PRESENTED HEREIN ARE BASED ON AN ARBITRARY ON -SITE DATUM.
THE GEOLOGIC CONTACTS PRESENTED HEREIN ARE BASED ON
INTERPOLATION BETWEEN THE BORING LOGS ASSOCIATED WITH THE
MONITOR WELLS DEPICTED ON THIS FIGURE. THESE CONTACTS MAY BE SHARP
FOROR ONLY THEAL AND IMMEDIATEENC VICINITY CONSIDERED F THE MONITOR ACCURATE
WELLS.
0 50
APPROXIMATE SCALE IN FEET
.111= j1
h.fin^.fir
e.:.Ap a
100
90
BO
70
BO
50
40
30
20
10
0
YELLOWISH TO ORANGISH BROWN CLAYEY SILT TO SILTY CLAY
GREENISH GREY PARRAIIY WEATHERED PHYLLITE
DENSE GREEN TO GREY ARGILL.TTE OR PHYLLITE
APPROXIMATE MONITOR WELL SCREEN INTERVAL
— PREDICTED GEOLOGIC CONTACT
94.19 RELATIVE GROUNDWATER ELEVATION AS MEASURED
ON JANUARY 29 - 31, 2002 BY HARMON ENVIRONMENTAL PERSONNEL.
VERTICAL GROUNDWATER EQUAL POTENTIAL UNE CALCULATED
BASED ON JANUARY 2002 GROUNDWATER ELEVATION MEASUREMENTS.
TWO DIMENSIONAL GROUNDWATER FLOW VECTOR CALCULATED
BASED ON JANUARY 2002 GROUNDWATER ELEVATION MEASUREMENTS.
94.0 RELATIVE ELEVATION OF GROUNDWATER EQUAL POTENTIAL CONTOUR
CALCULATED FROM THE JANUARY 2002 GROUNDWATER ELEVATIONS.
WATER TABLE ELEVATION BASED ON JANUARY 29 TO 31, 2002 DATA
N
[ 1 1

309 -01CAPFIGB.OWG
100
8o
60
. 40
20
0
n
NOTES:
THE VERTICAL EQUAL POTENTIAL CONTOURS PRESENTED HEREIN WERE CALCULATED
BASED ON MEASURED INTHE 1MONITORTION e WELL NETWORK BETWEEN JANUARY 29ETWEEN THE RELATIVE GROUNDWAIEFt . 2002
AND JANUARY 31. 2002 BY HARMON ENVIRONMENTAL PERSONNEL.
THE ELEVATIONS PRESENTED HEREIN ARE BASED ON AN ARBITRARY ON -SITE DATUM.
THE GEOLOGIC CONTACTS PRESENTED HEREIN ARE BASED ON
INTERPOLATION BETWEEN THE BORING LOGS ASSOCIATED WITH THE
OMONITOR WELLS R GRADATIONAL FIGURE.AREON CONSIIDEREDS BE REASONABLY ACCURATMAY E SHARP
FOR ONLY THE IMMEDIATE VICINITY OF THE MONITOR WELLS.
1O
APPROXIMATE SCALE IN FEET
1
L
1
B'
100
80
60
40
- 20
0
LEGEND
"11-:Ili
llif
tie
YELLOWISH TO ORANCISH BROWN CLAYEY SILT TO SILTY CLAY
GREENISH GREY PARTIALLY WEATHERED PHYLUM
DENSE GREEN TO GREY ARGIWTE OR P}MLITE
APPROXIMATE MONITOR WELL SCREEN INTERVAL
r PREDICTED GEOLOGIC CONTACT
•
95.42 RELATIVE GROUNDWATER ELEVATION AS MEASURED
ON JANUARY 29 - 31. 2002 BY HARMON ENVIRONMENTAL PERSONNEL
VERTICAL GROUNDWATER EQUAL POTENTIAL UNE CALCULATED
BASED ON JANUARY 2002 GROUNDWATER ELEVATION MEASUREMENTS.
�•- TWO DIMENSIONAL GROUNDWATER FLOW VECTOR CALCULATED
BASED ON JANUARY 2002 GROUNDWATER ELEVATION MEASUREMENTS.
94.0 REUTTE ELEVATION OF GROUNDWATER EQUAL POTENTIAL CONTOUR
CALCULATED FROM THE JANUARY 2002 GROUNDWATER ELEVATIONS.
WATER TABLE ELEVATION BASED ON JANUARY 29 TO 31. 2002 DATA
[ t 1 1 [ E t E
t
E 1 E
E [ t

s-8`
CADMIUM 0.5 mg/kg
CHROMIUM 0.8 mg/kg
0-4
CADMIUM 11.91 mg/kg
CHROMIUM 19.70 mg/kg
VOCe BDL
S-7
CADMIUM 1.2 mg/kg
CHROMIUM 17 mg/kg
NOTES
0-5
CADMIUM 3.31 mg/kg THE OIL SAMPLE YTICAL RESULTS
CHROMIUM 23.47 mg/DIM FIGURE FIGURE ARE RE
7 OF THE REVISED CAPPREPAREDED ON
VOCe a BY RESOLVE ENVIRONMENTAL SERVICES. P.A.
ON AUGUST 17, 2000.
THE SOIL SAMPLES WERE COLLECTED BY
RESOLVE PERSONNEL AND ANALYZED BY
HYDROLOGIC. INC. IN ACCORDANCE WITH
SW-848 METHOD 8240.
SOIL SAMPLES C-1 AND C-2 WERE
COLLECTED ON NOVEMBER 21, 1994.
HIGHWAY 74, �� SOIL SAMPLES S-1 THROUGH S-10 WERE
• .
COLLECTED ON NOVEMBER 18. 1994.
FOR COMPLETE ANALYTICAL REPORTS.
S-9 PLEASE REFER TO THE CLOSURE PLAN
PREPARED BY RESOLVE DATED JUNE 19, 1998.
D-3
CADMIUM 7.28 mg/kg
CHROMIUM 22.42 mg/kg
VQCe 13DL
HIGHWAY 74
S-6
CADMIUM 2.4 mg/kg
CHROMIUM 17 mg/kg
S-4
0-2
CADMIUM 104.33.mg/kg CHROMIUM 15 mg/kg
CHROMIUM 51.25 mg/kg
VOCe 1311
CADMIUM 16 mg/kg
S-2
CHROMIUM 0.5 mg/kkg
0-1
CADMIUM 2.83 mg/k
CHROMIUM 21.35 mg/k
VOCe •D
I I
.r .
S-5
CADMIUM 8.2 mg/kg
CHROMIUM 19 mg/kg
MW-3 0
MW-2
S-10
CADMIUM 0.2 mg/kg
CHROMIUM 12 mg/kg
S-3
CADMIUM 0.3 mg/kg
CHROMIUM 19 mg/kg
s-1
CADMIUM 0.9 mg/kg
CHROMIUM 15 mg/kg
MW-1
MW-1A
C-2
CADMIUM 5.17 mg/kg
CHROMIUM 32.61 mg/O
VOCs E8
7
C-1
CADMIUM 3.45 mg/kg
CHROMIUM 22.04 mg/kg
VOCe BBOOLL
MW-6 0
CADMIUM 0.5 mg/kg
CHROMIUM B mg/kg
PZ-2 A
/
BASE MAP PROVIDED BY AQUATERRA REPORT -DATED SEPTEMBER 29, 1994 AS REVISED BY RESOLVE ENVIRONMENTAL SERVICES, P.A.
LEGEND
PZ-4 PERIMETER LOCATION
0 MONITOR WELL LOCATION
MW-2
APPROXIMATE LOCATION OF
SURFACE WATER DRAINAGE
APPROXIMATE LOCATION OF
FORMER SUMP
mg/kg
BOL
MILLIGRAMS PER KILOGRAM
BELOW THE METHOD DETECTION LIMIT
1 0
APPROXIMATE SCALE IN FEET
3n4—n1 (APFtf:7 nWr
E 1 •1 1 E 1 I -1

t 1-
OFFICES
ASPHALT
PARKING
MANUFACTURING
BUILDING
LEGEND
SOIL BORING LOCATION
SB-13
SURFACE WATER DRAINAGE
BASE MAP PROVIDED BY AQUATERRA REPORT DATED
SEPTEMBER 29, 1994 AS REVISED BY RESOLVE
ENVIRONMENTAL SERVICES, P.A.
HARMON ENVIRONMENTAL
615 BRUCE THOMAS ROAD
MONROE, NORTH CAROLINA
[phone] PHONE & FAX
SB-9 (3-5')
TRICHLOROETHENE BDL
SB-10 (3-5')
TRICHLOROETHENE BDL
S8-11 (3-5')
TRICHLOROETHENE BDL
S8-12 (3-5')
TRICHLOROETHENE BDL
SB-` 8 (0-2')
TRICHLOROETHENE BDL
SB-7 (0-2')
TRICHLOROETHENE BDL
SB-5 (0-2')
TRICHLOROETHENE BDL
WAREHOUSE
EQUIPMENT
ASSEMBLY
BUILDING No.1
SB-2 (0-2')
TRICHLOROETHENE 0.007
NOTES:
SOIL SAMPLES COLLECTED
BY AQUATERRA, INC. ON
MARCH 20, 1995.
BDL - BELOW QUANTITION LIMITS
RESULTS PRESENTED IN MILLIGRAMS
PER KILOGRAM (mg/kg)
SAMPLES ANALYZED BY DEPICTED
METHODS BY IEA, INC. OF CARY
NORTH CAROLINA.
+SB-3 PAINTING
FORMER BOOTH
PLATING
BUILDING
EQUIPMENT
ASSEMBLY
BUILDING No.2 /
SB-14
LOWER 4-
SUMP
se-13 APPROXIMATE
LOCATION OF SEPTIC
TANK LEACH FIELDS
SATELLITE HAZARDOUS
-� WASTE ACCUMULATION AREA
/
O
/Qo2
// I
0
25
APPROXIMATE
SCALE IN FEET
FIGURE 8
MARCH 20, 1995 SOIL TEST BORING
LOCATIONS & ANALYTICAL RESULTS
EQUIPMENT & SUPPLY, INC.
4507 HIGHWAY 74 WEST
MONROE, NORTH CAROLINA
OMO'80I.JdV0 L 0-60C

MW-1
SW-846 METHOD 8260
1.1-DICHLOROETHENE 80 will
CIS-1,2-DICHLOROETHENE 8,800 ug/I
TRANS-1.2-DICHLOROETHENE 200 ug/I (J)
TETRACHLOROETHENE 14 ug/I
TOLUENE 19 ug/I
1.1.2-TRICHLOROETHANE 9.2 ug/I
TRICHLOROETHENE 24.000 ug/I
VINYL CHLORIDE 940 ug/I (J)
XYLENES (TOTAL) 12 ug/I
4
MW-2
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
PZ-5
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
PZ-3
SW-848 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
MW-7
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
PZ-4
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
HIGHWAY 74
•
OFFICES
MANUFACTURING
BUILDING
MW-3
SW-848 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
HIGHWAY
NE
EQUIPMENT
ASSEMBLY
BUILDING No.1
FORMER
PLATING
BUILDING
PAINTING
ROOM
,e
NOTES:
THE GROUNDWATER SAMPLES REPRESENTED BY THE DATA PRESENTED ON THIS FIGURE
WERE COLLECTED BY HARMON ENVIRONMENTAL PERSONNEL BETWEEN JANUARY 29. 2002
AND JANUARY 31. 2002 AND ANALYZED BY PRISM LABORATORIES. INC. OF CHARLOTTE. NORTH CAROUNA.
jar
APPROXIMATE SCALE IN FEET
MW-31
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
•
LWAREHOUSE
EQUIPMENT
ASSEMBLY
BUILDING No.2 ,
MW-1A
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
PZ-1
SW-848 METHOD 8280
NO TARGETED COMPOUNDS DETECTED
MW-4
SW-848 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
BASE MAP PROVIDED BY AQUATERRA REPORT DATED SEPTEMBER 29. 1994 AS REVISED BY RESOLVE ENVIRONMENTAL SERVICES, P.A.
PZ-2
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
MW-5
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
MW-8
SW-848 METHOD 8260
1,1-DICHLOROETHENE 5.1 ug/L
CIS-1,2-DICHLOROETHENE 430 ug/I (J)
TRANS-1.2-DICHLOROETHENE 11 ug/I
1,1,2-TRICHLOROETHANE 11 ug/I
TRICHLOROETHENE 15,000 ug/I
VINYL CHLORIDE 31 ug/I
MW-9
SW-846 METHOD 8260
NO TARGETED COMPOUNDS DETECTED
MW-6
SW-846 METHOD 8260
1,1-DICHLOROETHENE 5.1 ug/I
CIS-1.2-OICHLOROETHENE 510 ug/I
TRANS-1,2-DICHLOROETHENE 37 ug/I
TRICHLOROETHENE 430 ug/I
VINYL CHLORIDE 140 ug/I
LEGEND
PZA-4
O MONITOR WELL LOCATION
MW-2
will MICROGRAMS PER LITER
(J)
PIEZOMETER LOCATION
ESRMATED VALUE PROVIDED
BY THE ANALYZING LABORATORY
in4-nt CAPF7G9.nw(',
N
Z N "' V
WO 41
Z U
1
w oltg
z�x�z
0
0 Le,
• m c
1 -'_—I- —1 -1 1 •

441,4\4,
SURFACE WATER DRAINAGE DITCH
APPROXIMATE LOCATION OF
PROPOSED RECOVERY WELLS
0 MW-8
MW-8 /
a, MW-9
•
PZ-1 ' ' APPROXIMATE LOCATION OF
I . FORMER SUMP
I FORMER LPAINTING PLATING `
ASSEMBLEQUIPMENTY
PZ-4Q ROOM • BUILDING ko.2
// BUILDtNG
:r
I 4.-
1
L/,/.
- - 0-4 /,
EQU. PMENT
ASSEMBLY
BUILDING No.1
BASE MAP PROVIDED BY AQUATERRA REPORT DATED SEPTEMBER 29, 1994 AS REVISED BY RESOLVE ENVIRONMENTAL SERVICES. P.A.
LEGEND
P� 4
MW 2
PIEZOMETER LOCATION
MONITOR WELL LOCATION
APPROXIMATE LOCATION OF
SURFACE WATER DRAINAGE
APPROXIMATE LOCATION OF
FORMER SUMP
• APPROXIMATE LOCATION OF
PROPOSED RECOVERY WELLS
Q�0
APPROXIMATE SCALE IN FEET
1 9-n CAPFtrt n nwrt
1 1 ._. t 1 ,-- -1 ---I --I -. [ E 1 1 1

GROUND SURFACE
CONCRETE COLLAR
6-INCH DIAMETER SCHEDULE
40 PVC WELL CASING
LEAN GROUT
BENTONITE
MANUFACTURED WELL SCREEN
FILTER PACK
4
f
• •:
BOLT DOWN LID ON
2 FOOT BY 2 FOOT
STEEL VAULT
APPROXIMATE
DEPTH IN FEET
0
BASE OF CONCRETE
COLLAR
i . TOP OF BENTONI TE
SEAL
TOP OF SAND PACK
PROPOSED
TOP OF WELL SCREEN
INTERVAL
PROPOSED
BOTTOM OF WELL
SCREEN INTERVAL
75
2
4
5
7
HARMON ENVIRONMENTAL
615 BRUCE THOMAS ROAD
MONROE, NORTH CAROLINA 28112
[phone] PHONE & FAX
HARMON®INTERUNK-CAFE.COM
FIGURE 11
PROPOSED RECOVERY WELL SCHEMATIC
EQUIPMENT & SUPPLY, INC.
4507 HIGHWAY 74 WEST
MONROE, NORTH CAROLINA
i
era-rMIIae5ra=sae

1.
fan
CONCRETE PAD
MASONRY BLOCK
CONTAINMENT
DIKE
FLOW METER
AIR INTAKE MANIFOLD
1
VACUUM STRIPPING UNIT
U
BLOWER
MOTOR
BLOWER
TRANSFER
PUMP No. 2
ELECTRICAL PANEL
1,000 GALLON
EFFLUENT
STORAGE
TANK
-�-- CONTROL PANEL
TRANSFER FLOW
PUMP METER
NO. 3
1,000 GALLON
INFLUENT
STORAGE
:ANK
f
TRANSFER
PUMP
NO. 1
TO NPDES
PERMITTED
OUTFALL
0... AIR COMPRESSOR
FOR DRIVING
RECOVERY PUMPS
FROM RECOVERY WELL
HARMON ENVIRONMENTAL
615 BRUCE THOMAS ROAD
MONROE, NORTH CAROLINA 28112
[phone] PHONE & FAX
FIGURE 12
CONCEPTUAL GROUNDWATER TREATMENT
SYSTEM SCHEMATIC
EQUIPMENT & SUPPLY, INC.
4507 HIGHWAY 74 WEST
MONROE, NORTH CAROLINA
0M07 lDIJdV310-60£

Tables
n,

Fml
TABLE 1'
Depth to Water Measurements
Equipment & Supply, Inc.
Monroe, North Carolina
EPA ID No. NCD 986 194 421
Project No. 309-01
January 29, 2002
Well No.
Top of
Casing
Elevation .
Ground
Elevation
Top of
Screen
Elevation
Bottom of
Screen
Elevation .
Depth to
Groundwater
Level(fl)
Groundwater
Elevation
MW-1
100.67
98.8
78.8
68.8
5.25
95.42
MW-IA
99.26
99.7
9.7
-5.3
5.59
93.67
MW-2
98.61
96.7
79.7
69.7
3.64
94.97
MW-3
99.15
97.4
82.4
72.4
4.55
94.60
MW-3i
99.31
97.4
52.4
42.4
5.12
94.19
MW-4
113.77
111.8 •
46.8
36.8
18.65
.95.12
MW-5
99.42
99.4
77.6
67.6
4.04
95.38
MW-6
96.58
,
96.9
81.9
66.9
4.10
92.48
MW-7
99.55
99.9
86.9
71.9
3.16
96.39
MW-8
98.61
96.39
88.6
73.6
6.46
92.15
MW-9
96.71
93.69
86.7
76.7
3.99
92.72
84.1
8.25
93.87
PZ-1
102.12
100.1
94.1
PZ-2
97.95
95.6
90.1
80.1
5.99
91.96
PZ-3
104.78
102.7
92.2
82.2
9.15
95.63
PZ-4
106.21
106.5
92.5
82.5
12.20
94.01
PZ-5
108.08
105.4
95.4 _
85.4
13.67
94.41
_
Notes: All elevations presented in this table are relative to an arbitrary on -site benchmark
The well elevations and construction details presented for monitor wells MW-1, MW-2, MW 3, MW 3i,
MW-4 and for the five piezometers are based on elevations tables presented in the September 1994
Additional Groundwater Assessment Report prepared by Aquaterra, Inc.
Water levels collected on January 29, 2002 by Harmon personnel.

RIM
Table 2
Analytical Results Summary
January 2002 Groundwater Sampling Event
Equipment & Supply, Inc.
EPA ID No. NCD 986 194 421
Project No. 309-01
1,1,2-trichloroethane
trichloroethene
•°
ka w total xylenes
0
Constituent
o
°
c
.co
0
°
1
i
tt c
°otu
.4,
a
*TCAC 2L
tandard
7
70
70
0.7
1,000
Del.
Limit
2.8
0.015
200 (J) ,
14
19
9.2
24,000
940 (J)
1114W-1
60
8,800
1,4W-1 A
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
"►IW -2
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
MW-3
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
mil4W-3i
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
MW-4
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
4W-5
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
* �-6
n+Ta •'
5.1
510
37
<5.0
<5.0
<5.0
430
140
<5.0
<5.0
<5.0
<5.0
<10
<5.0
.iiW-7
<5.0
<5.0
<5.0
<5.0
_g
5.1
430 (J)
11
<5.0
<5.0
11
15,000
31
<5.0
f ,
MW-9
<5.0
<5.0
<5.0
�
<5.0
1
<5.0
<5.0
<5.0
<10
<5.0
`�
<5.0
<5.0
.<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0'Z-1
PZ-2
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<10
<5.0
mil
'Z-3
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
4
<10
<5.0
igZ-4
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5.0
<5. 0
<5.0
<5.0 _
<10
<10
<5.0
<5.0
'Z-5
<5.0
.,,.,..,
L__,T..�..,,_. r...A .,.,.,,a.,ta1 nercnnnel
and
Totes:
Groundwater samples collected between January 29, 2002 and January 31,
analyzed by Prism Laboratories, Inc.
For complete analytical reports please refer to Attachment A.
Det. Limit = Method Detection Limit
(J) = Estimated Value provided by Prism Laboratories, Inc.

J 1 - 1-- .1- 1--- ]--
1 I.-' 1... 11...
Table 3
Summary of Historical Groundwater Analytical Results
Monitor Well MW-1
Equipment & Supply, Inc.
Monroe, North Carolina
Prnis'ct Nn_ %E14_t11
Constituent (yg/1)
NCAC 2L
Standard
Sampling Date
11/3/94
3/29/95 _
7/12/95
9/25/95
3/27/96
3/17/97
9/23/97
12/17/97
3/26/98 ,
12/7/98
1/31/02
12,000
7,900
4,500
24,000
trichloroethene
2.8
10,150
4,000
2,500
2,000
3,900
3,470
5,000
1,1-dichloroethene
7.0
10.0
7.0
5.3
<100 •
<100
<5.0
<5
7
<5
<100
60
trans-1,2-dichloroethene
70.0
96.0
78.0
77
-... •; .
<' "; �(,..#�,•
44.5
95
120
cis-1,2-dichloroethene
' '
70.0
•,:,•'�� •�
�- �'' .. • i-
.r,�c: 'c
•i,
�;, •x.-• ••.•• •••:?
i.. 7 ',r
`•''y' �4.i'�-ttt..•.t •
-� �•
'I.y'�5
2 000
�
,hr� �:
{ ,
}�' ...: •� -Nr,.,
�: t.: �Yts•.�jt�,ts27ty!
fti•� ; -f �
fri .•.. , ..:..,.
•..LH'it. Ca :�.�.t..���
w���-WI- ;:
�««::- -. ..
•-: t�1.36,,:
.vLl��'•", ••ti'J,,f:-•1.ti.
2,100
510
.. .,�
890
8 800
'rti"�v..ti
-r;it'-
.�-• 1�.
•.tf�r•'� •�iu)•.
,1..
•.,<'+
��
.t
�'
vd v:'
:, ,•f♦
lit (`•.
`` �DiY'-<'sif:'>..•
•:�• .� F•.i•.� ..
.. 4.-
,,. ....,.,,CC��
i"q,1. ""igiS. , =..
r!•.t
.:. -y�••'`'
ar:
~:-�•.:•`- t.;Sc:-
.
_
�
•..i.
� ..y. :<.s.;,'
.'A`
->>,...,.
'�t '«.. ��:-.,
•J !. .�f �l.�
�i7i;•7:- !.
> `r.
-s , p::•, . '
• .s.',,{:.i:'; 4:
� i •• ...hfV'� ��•
� ��.✓ti. �.•
- t:%4.,.� ,, ,.,:
;{it. nh�*'ra_
1 800
460
•: ?i��. C.j•�ti . t.
-.1�-�•.. k�1.. Li'
..�;/•4
•��.,.•": �.'_
iL' ;. r'�-ti.:i.�..
y�.. ) t jy)
�Y. M.�.+�j,•�•p
. 3f R
-• :'. ,.;•F-:..
:�.ti
:
i. ^.• \!. (t. �..�•.;:
''�7i . Y:K rY ��l
- ;."'t
• � �'�i:: - �
�S � �... 4•
1. SY ��;�
.4 �lli." $%-:� ,•' '�'
..�.t•... _;:.;.:�
'Sj"
[�-
.�; {y �
i 4:2,, �1•` S:'
: >; .,5 •..
-!%•�,A+
. .f:••a
.e. � �.eit `i-Ai Li
!,.7., -_.a:f;l..r>t•,..
1,1,2-trichloroethane
.. ...
<5.0
<5.0
<5.0
<100
<100
<5.0
<5
<5
<5
<100
9.2
tetrachloroethene
0.7
<5.0
<5.0
<5.0
<100
<100
<10.0
<5
<5
<5
<100
14
, 4- 0.. Tp1.' .
toluene
1,000
10.0
, 7.0
<5.0
<100
<100
<5.0
<5
<5
<5
>:-'
19
vinyl chloride
0.015
<10
155
65
<200
<200
19.9
30
26
<10
<500
940 J
carbon disulfide
700
<5.0
<5.0
<5.0
<100
<100
<5.0
<50
<50
<50
',is <
<50
xylenes (total)
<5.0
<5.0"
_ <5.0
<100
_ <100
<5.0
_.:`ti:';'
<5
<5
<5
" '�:ti:t
�':'`.ti:
12
Notes: The groundwater samples collected betweenNovember 1994 and July 1995 were collected by Resolve Environmental Services, P.A. (Resolve) personnel and analyzed
by Hydrologic, Inc. of Frankfort, Kentucky in accordance with SW-846 Method 8240. The groundwater samples collected between September 1995 and March 1996
were collected by Resolve personnel and analyzed by IEA, Inc. of Cary, North Carolina in accordance with SW-846 Method 8240, The March 1996 groundwater
samples were collected by Resolve personnel and analyzed by Hydrologic, Inc. of Frankfort Kentucky in accordance with SW-846 Method 8240. The groundwater
samples collected between September 1997 and March 1998 were collected by Resolve personnel and analyzed by Prism Laboratories, Inc., of Charlotte, North
Carolina Hydrologic, Inc. of Frankfort Kentucky in accordance with SW-846 Method 8240. The groundwater samples collected in December 1998 were collected
by Resolve personnel and analyzed by Prism Laboratories, Inc., of Charlotte, North Carolina in accordance with EPA Method 601. The January 2002 samples were
collected by Harmon Environmental personnel and analyzed by Prism Laboratories, Inc. of Charlotte, North Carolina in accordance with SW-$46 Method 8260.
J = estimated value, due to compound concentration exceeding calibration limit of instrument.
µg/1= micrograms per liter
Only data associated with detected compounds are presented in this table. For complete January 2002 analytical reports, please refer to Appendix A. For the other sampling
events please refer to the appropriate semi-annual reports.

f:11
Appendix A
January 2002 Groundwater Analytical Results

Equipment & Supply
EEI Project No. 790C-NC
Appendix B
Soil Analysis Report
n
7

aia
gata Monroe, North Carolina 28112
Mgt
September 17, 2003
Mr. Glenn Hudson
Equipment & Supply, Inc.
4507 Highway 74 West
Monroe, North Carolina 28110
Harmon Environmental, PA.
615 Bruce Thomas Road Phone and Fax: [phone]
Harmon [e-mail]
Re: Evaluation of On -Site Soils and Bedrock for Potential
Subsurface Discharge of Treated Groundwater from
Proposed Reinediation System
Equipment & Supply, Highway 74 West, Monroe, North Carolina
Project 309-02
Dear Mr. Hudson:
To comply with the requirements oftheNational Pollution Discharge Elimination System (NPDES)
Permit Application, Harmon Environmental, PA respectfully submits this letter summarizing the
subsurface conditions at the references site. Based on the information presented in this evaluation,
the soil and bedrock underlying the Equipment & Supply, Inc. facility does not appear to be
conducive for subsurface disposal of the treated water generated from the proposed groundwater
remediation system. Figure 1 presents the location of the site is depicted on an excerpt of a United
"" States Geologic Survey (USGS) topographic map of the region.
As discussed in the April 15, 2002-Revised Corrective Action Plan, The Equipment & Supply, Inc.
1.1
site is located within the Carolina Slate Belt of the Piedmont Physiographic Province. The Carolina
Slate Belt consists of low-grade metamorphosed volcanic and sedimentary rocks situated in the east -
central portion of the Piedmont Province of North Carolina. Coastal Plain sediments overlap the
Carolina Slate Belt to the east. The Charlotte Belt, which consists of higher -grade metamorphic and
igneous rocks, borders the Carolina Slate Belt to the west.
The Carolina Slate, Belt consists primarily of laminated and non -laminated metamorphosed peltic
fan
rocks. Rock color typically varies from bluish- grey when fresh to brown and reddish -orange when
weathered. When present, laminated bedding planes are typically well developed and exhibit
bedding plane cleavage. Igneous intrusions are most common as dikes with general mineralogy of
plagioclase, clinopyroxene, and chlorite with biotite and quartz filling voids. The metagabbro is
p., generally xenoblastic, but abundant sericite and epidote obscure structure and mineralogy.
Quartz veins are present throughout the Carolina Slate Belt. These veins (i.e. dikes and sills) are
p.m typically intruded into fractures in the country rock. Large muscovite flakes are commonly seen
along these intrusions, possibly indicating recrystalization of the country rock at the time of
intrusion. The quartz is usually milky in appearance (Randao, 1972).

Pi MI
Mr. Glenn Hudson
September 17, 2003
Page 2
The Gold Hill Shear Zone is a major structural feature present along the westt rn boundary of the
Carolina Slate Belt. The Gold Hill Shear Zone is thought to be a thrust fault generally trending
approximately north 15 degrees east and extending southward from near the town of Southmont in
Davidson County, North Carolina to the eastern edge of Indian Trail in Union County, North
Carolina. Previous investigations by others indicated the rocks along the western margin of the shear
0.4 zones are characterized by higher ranking metamorphism, including the occurrence of slate and
phyllite. Local fault planes, quartz veins and minor joints are also commonly associated with this
major shear zone trend (Randazzo, 1972; The Geologic Map of North Carolina, 1985).
Boring logs were prepared in conjunction with the advancement of the eleven monitor wells and five
piezometers at the Equipment & Supply, Inc..facility. These logs were prepared by Aquaterra and
Resolve personnel during the advancement of the monitor wells and piezometers. Based on the
boring logs, the lithology underlying the Equipment & Supply, Inc. facility appears to be relatively
uniform. In general, approximately 6 inches of top soil was present across a majority of the site.
0.4 Underlying the top soil was a yellowish to orangish brown, clayey silt to silty clay material
apparently weathered in -place from the underlying parent rock. This clayey silt horizon ranged in
thickness from less than one foot to 10.5 feet across the site. Underlying this saprolite material was
a layer of greenish -grey partially weathered phyllite rock. The contact between the partially
weathered rock and the underlying phyllite was observed to range in depth from approximately 2 feet
below grade in the vicinity of monitor well MW-9 to greater than 25 feet below grade in the vicinity
fanof monitor well MW-3. The phyllite parent rock on -site has been described as a dense, dry, green
to grey argillite or phyllite.
The Soil Survey of Union Counter, North Carolina prepared by the US Department of Agriculture
lists the soil underlying the Equipment & Supply facility as the Badin Urban Land Complex. The
surface layer of this soil is typically described as approximately 6 inches of reddish brown channery
silty clay. This surface material overlies an approximately 23 inch thick subsoil typically consisting
of red silty clay grading into a red channery silty clay loam with yellow and strong brown mottles.
�., The Soil survey indicates weathered fractured bedrock is typically encountered at depths of
approximately 29 inches below grade. This material is considered Severe by the US Department of
Agriculture for use in absorption fields based on the shallow depth to bedrock.
The aquifer underlying the Equipment & Supply, Inc. facility is typical of the composite weathered
fractured rock aquifers common within the Piedmont of North Carolina. The aquifer is unconfined,
existing under phreatic, or water table conditions. Under these conditions, the water table surface
is in equilibrium with the atmospheric pressure and is not confined by low -permeable layers between
the surface of the water table and the surface of the ground. The average depth to groundwater at
"'' the Equipment & Supply, Inc. site, as measured during the January 2002 groundwater sampling
event, was approximately 5.8 feet below the ground surface.
011

Mr. Glenn Hudson
September 17, 2003
Page 3
Groundwater under water table conditions is typically recharged by direct infiltration from
o, precipitation:. The water flows through the pore space on. the geologic media to its ultimate discharge
in topographic low regions where the water table surface inthsects the surface of the ground. As a
result of these typical flow patterns, the potentiometric surface expressed by water table aquifers
typically appears as a subdued replica of the topography.
Potentiometric maps generated from water levels collected historically from the site indicate the
shallow horizontal component of groundwater flow is generally to the southeast across the site. The
shallow horizontal component of hydraulic gradient was calculated to range from 0.005 feet per foot
(ft/ft) to 0.02 ft/ft.
In September 1994, Aquaterra, Inc. personnel conducted single well hydraulic conductivity (slug)
tests in on -site monitor wells and piezometer. Based on these tests, Aquaterra, Inc. concluded the
fir! average hydraulic conductivity in the shallow portion of the aquifer to be on the order of 1.34 feet
per day (ft/d). This average hydraulic conductivity value appears to be high relative to the results
of constant discharge (pump) tests conducted by Harmon Environmental, PA personnel at other sites
in the vicinity of the Equipment & Supply, Inc. facility. Typical hydraulic conductivity values
associated with pump tests conducted in this portion of Union County ranged from 0.2 ft/d to 0.6
Pal
ft/d.
Pump tests are generally considered to be a more accurate method of evaluating aquifer
characteristics. As a result, Harmon Environmental has calculated the groundwater flow at the site
based on an estimated hydraulic conductivity of 0.4 ft/d as suggested by Resolve in the August 17,
2000 Revised Corrective Action Plan.
Based on the following estimated values, the shallow horizontal component of groundwater flow
can be estimated using the equation:
VV = K * dh/dl
ne
Where Vh = the horizontal component of groundwater flow velocity in feet per day (ft/d)
Kh = the horizontal component of hydraulic conductivity in feet per day (ft/d)
0.4 ft/d (8/17/00 Revised CAP, Resolve)
dh/dl= the shallow horizontal component of gradient in feet per foot (ft/ft)
,., 0.005 ft/ft to 0.02 ft/ft (1/29/02 to 1/31/02 data)
ne = estimated effective porosity
10% (8/18/00 Revised CAP, Resolve)
Based on the above assumed values the horizontal component of the groundwater flow velocity at
the Equipment & Supply, Inc. facility is estimated to range from 0.02 ft/d (7.3 ft/year) to 0.8 ft/d
(292 ft/year).
AM

AIM
t
MEI
Mr. Glenn Hudson
September 17, 2003
Page 4
Based on the information presented in this evaluation, the soil and bedrock underlying the
Equipment & Supply, Inc. facility does not appear to be conducive for subsurface disposal of the
treated water generated from the proposed groundwater remediation system. As a result, Harmon
Environmental, PA recommends Equipment & Supply, Inc. pursue a surface water discharge fbr this
water.
Please call if you have any questions or require any additional information.
Sincerely,
Harmon Environmental, PA
SCAIL-440
Richard L. Harmon, P.G. "�':`. � 101
'F+ :f;President SEA '
Attachment = y ' �" ��E * d
S e�

References

References
Semiprini, Lewis., Insitu Bioremediation of Chlorinated Solvents, Department of Civil Engineering,
Oregon State University, Corallis, Oregon. Presented in the Environmental Health Perspectives
Supplement Biodegradation. Volume 103. Supplement 5. June 1995. National Institutes of Health:
National Institute of Environmental Sciences.
Zinder, Stephen H. and Gossetts, J. M., Reductive Dechlorination of Tetrachloroethene by a High
Rate Anaerobic Microbial Consortium, Department of Microbiology and Civil Environmental
Engineering, Cornell University, Ithaca, New York. Presented in the Environmental Health
t•, Perspectives Supplements. Biodegradation. Volume 103. Supplement 5. June 1995. National
Institutes of Health. National Institute of Environmental Health Sciences.
�► Montgomery, John H., Groundwater Chemicals Field Guide. Selected Pages. Lewis Publishers
1991.
forl
MIR
Resolve Environmental Services, P.A., Groundwater Assessment Report of the Equipment & Supply,
Inc. , Monroe, North Carolina. May 1996.
Resolve Environmental Services, P.A., Trichloroethene Source Investigation, Soil Quality
Assessment, Equipment & Supply, Inc., 4507 Highway 74 West, Monroe, North Carolina., July 6,
1995.
Resolve Environmental Services, P.A., Revised Corrective Action Plan, VOC-Impacted
Groundwater, Equipment & Supply, Inc., Monroe, North Carolina., August 17, 2000.
Aquaterra, Inc., Site Characterization Report, Equipment & Supply, Inc. Site, Monroe, North
Carolina, February 18, 1994.
Aquaterra, Inc., Groundwater Sampling Plan, Equipment & Supply, Inc. Site, Monroe, North
Carolina, February 18, 1994.
North Carolina Geologic Survey, Geologic Map of North Carolina, 1985
Randazzo, F., Petrography and Stratigraphy of Carolina Slate Belt, Union County, North Carolina,
1972
Harmon Environmental, Revised Corrective Action Plan, Equipment & Supply, Inc., April 15, 2002
US Department of Agriculture, Soil Survey of Union County, 1991

Figure
71
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SOURCE: MAPTECH.COM
_ • ••
•
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•
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a
-•
•
•
0
2000
4000
HARMON ENVIRONMENTAL, PA
615 BRUCE THOMAS ROAD
MONROE, NORTH CAROLINA 28112
[phone] PHONE & FAX
Harmon@ Interlink—cafe. cam
FIGURE 1
SITE LOCATION MAP
EQUIPMENT & SUPPLY, INC.
4507 HIGHWAY 74 WEST
MONROE, NORTH CAROLINA
SMO'001L0-60E