MO-9324_40784_CA_ROD_20230814

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

CORRECTIVE ACTION PLAN
RECORD OF DECISION

PERTH MINI MART
818 PERTH ROAD
TROUTMAN, IREDELL COUNTY, NORTH CAROLINA

Latitude: 35.684542° N Longitude: -80.895851° W

Release Information:
Date Release Discovered: November 30, 2017 (Lab Confirmed)
Estimated Release Quantity: Unknown
Release Cause/Source: Gasoline Underground Storage Tank System
Previous USTs (release source): 2, 6,000-gallon gas, 1, 4,000-gallon gas, 1, 2,000-gallon non-
ethanol gas (formerly held diesel)
Current (not leaking) USTs: 2, 12,000-gallon gas (compartmentalized)
Current (not leaking) AST: 1,2,000-gallon diesel
NCDEQ-DWM UST Release Incident Number: 40784
Risk Ranking Classification: High 392D
Land-Use Classification: Residential
Facility ID: 00-0-0000024524

Property Owner & UST Owner/Operator:

Madhukunj, LLC
135 Corona Circle
Mooresville, NC 28117

Terraquest Project No. 08217

August 14, 2023

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 i Troutman, Iredell County, NC
EXECUTIVE SUMMARY

On behalf of the responsible party (RP), Madhunkunj, LLC, and as requested by the North Carolina
Department of Environmental Quality’s Division of Waste Management’s Underground Storage
Tank Section (NCDEQ-DWM-UST), Terraquest Environmental Consultants, P.C. presents this
Corrective Action Plan Record of Decision (CAP ROD) for the release incident at the Perth Mini Mart
property located in Troutman, Iredell County, North Carolina. This work is related to a release from
a previous gasoline UST system. This ROD presents corrective actions that have been agreed upon
by the RP, the NCDWM-UST, and the environmental consultant, Terraquest.

Key information:
The subject release incident was discovered by lab confirmation on November 30, 2017 and
originated from gasoline USTs including 2, 6,000-gallon, 1, 4,000-gallon, and 1, 2,000-gallon tanks.
The volume of the release incident is unknown. Remedial efforts performed to date include the
excavation of 95 tons of contaminated soil following tank closure and multiple Mobile Multi-Phase
Extraction (MMPE) events. Municipal water is not available to all residents in the area who have
water supply wells.

Conceptual site model:
Prior assessment has revealed the presence of 5,893 pounds of soil contaminated above the Soil-
to-Groundwater Maximum Soil Contaminant Concentrations (STG MSCCs), 37,984 pounds of free
product, and 419.5 pounds of dissolved-phase groundwater contamination at concentrations above
the Gross Contamination Levels (GCLs). Free-phase product has been noted at thicknesses
exceeding 7 feet. Groundwater flow is directed to the south/southwest toward water supply wells.
Slug testing results indicate a hydraulic conductivity that ranges from 0.176 to 0.427 feet per day
and yields a groundwater seepage velocity of 16.35 feet per year. The presence of nineteen sole
source water supply wells located within 1,000 feet of the release area causes the High Risk ranking
of this site. Contaminant fate and transport modeling has shown that contamination will impact
downgradient water supply wells unless treated.

Remedial strategy:
Terraquest recommends SVE and air sparging as active treatment methods for the removal of free
product and GCL violations. Both methods proved practical during pilot testing. Terraquest roughly
estimates that 3-4 years of operating an SVE and air sparge remediation system followed by a year
of monitored natural attenuation could allow closure of this site in 2028 at a cost of $505,000.
Treatment progress would be tracked by gauging of free product, collection of SVE exhaust stack air
samples, and semi-annual sampling of the monitoring well network.

Remediation system design:
The remediation system will consist of ten soil vapor extraction (SVE) wells and seven air sparge
wells, each with an anticipated twenty-foot radius of influence. The wells will be placed across the
extent of free product and will extend from the UST basin downgradient to the south-southwest

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 ii Troutman, Iredell County, NC
where the treatment equipment pad will be placed, near the onsite aboveground storage tanks
(ASTs).

Both equipment and installation bids were sent to the following vendors: Piedmont Industrial
Services, Inc., Petroleum Resources and Development, Inc., Product Recovery Management, Inc.
(PRM), South Atlantic Environmental Drilling and Construction Co. Inc. (SAEDACCO), Soil &
Groundwater Remediation Services, LLC, Zava Industrial, Inc. PRM was the winning equipment
bidder with a price of $121,967.25 and S&G Remediation Services LLC was the installation bid winner
with a price of $52,095. Terraquest estimates a cost of $496,909.75 for the treatment of
contamination through project closure. The costs included are: installation of wells, purchase and
installation of an SVE and air sparge system, operation and monitoring costs, Notice of Residual
Petroleum, Public Notice, and well abandonment.

Terraquest anticipates roughly thirteen months from submittal of this ROD until the system is
activated. That timeline includes, one month for the NCDWM-UST to review the ROD and respond,
one month for all parties to meet and sign the ROD, one month for re-bidding of system equipment
and installation costs, one week for pre-approval of the system costs and supervised installation, six
months for construction of the system, three months for installation, inspection approval, utility
construction and activation, and one month to schedule system startup. The target active
remediation milestones that have been modeled to represent plume stability and receptor
protection will be the Gross Contamination Levels.

Free product measurements will be collected in conjunction with groundwater sampling events to
analyze if the projected remedial rate of product removal in the first year is on target. Product
measurements and groundwater sampling will be conducted quarterly for the first year and semi-
annually thereafter. Groundwater samples will be submitted for VOC analysis per method 6200B.
Contaminant mass can be calculated, and the treatment rates compared against the proposed
timeline to assess effectiveness.

Proposed monitored natural attenuation (MNA) phase:
MNA is not proposed as the primary means of treatment. However, throughout treatment and for
a one-year period following removal of free product and GCL violations, Terraquest proposes to
sample the 22-monitoring well network for VOCs via method 6200B. Samples will be collected
quarterly during the first year of operation and then semi-annually until product and GCL violations
are gone. A year of quarterly sampling would then follow to ensure that there are no contamination
rebounds across different seasons. Each sampling event has an estimated cost of $5,382.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 iii Troutman, Iredell County, NC
TABLE OF CONTENTS

EXECUTIVE SUMMARY ................................................................................................................... i
1.0 INTRODUCTION ................................................................................................................. 1
2.0 UPDATE OF SITE HISTORY AND SOURCE CHARACTERIZATION .......................................... 1
2.1 UST Owner .................................................................................................................... 1
2.2 Tank and Release Information ....................................................................................... 1
2.3 Receptor Information .................................................................................................... 4
2.4 Regional Geology and Hydrogeology ............................................................................. 5
2.5 Site Geology and Hydrogeology .................................................................................... 7
3.0 UPDDATE OF SITE ASSESSMENT INFORMATION ............................................................. 13
3.1 Soil Assessment ........................................................................................................... 13
3.2 Groundwater Assessment ........................................................................................... 14
3.2.1 Monitoring Well Network ........................................................................................ 14
3.2.2 Groundwater Sampling............................................................................................ 14
3.2.3 Groundwater Analytical Results .............................................................................. 15
3.3 Free Product Assessment and Recovery ...................................................................... 16
4.0 OBJECTIVES FOR CORRECTIVE ACTION AT THE SITE ........................................................ 24
5.0 REMEDIAL ACTION IMPLEMENTATION ........................................................................... 26
5.1 Basis for Selection of the Specific Design .................................................................... 26
5.2 Remedial System Design ............................................................................................. 27
5.3 Bidding ........................................................................................................................ 27
5.4 Remediation System Schedule .................................................................................... 28
5.5 Active Remediation Progress Milestones (Monitoring) ............................................... 29
5.6 Remedial system operation and maintenance plan .................................................... 29
5.7 Anticipated costs ......................................................................................................... 30
6.0 PUBLIC NOTICE ................................................................................................................ 30
7.0 LIMITATIONS ................................................................................................................... 30
REFERENCES ................................................................................................................................ 31
CERTIFICATION ............................................................................................................................ 32

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 iv Troutman, Iredell County, NC
TABLE OF CONTENTS (continued)

TABLES

1. Site History (UST/AST System Information)
2. Surrounding Property Owner Information
3. Water Supply Well Information
4. Monitoring Well Construction Information
5. Historical Summary of Groundwater Sampling Results
6. Bioscreen Modeling Inputs and Notes
7. Corrective Action Plan Costs

FIGURES

1. Site Location Map
2. Site Vicinity Map
3. Site Layout Map
4. Potentiometric Surface Map (1/18/23)
5. Groundwater Analytical Results Map
6. SVE and Air Sparge Layout

APPENDICES

A. NORR
B. Historical Groundwater Elevation Data
C. Remedial Bid Specifications and Bid Documentation
D. Public Notice
ENVIRONMENTAL ACRONYMS

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 v Troutman, Iredell County, NC
2L Standard Groundwater Standards Title 15A NCAC 2L
0.0202(g)
2B Standard Surface Water Standards Title 15A NCAC 2B
AFVR Aggressive Fluid-Vapor Recovery
AST Aboveground Storage Tank
BGL Below Ground Level
BTEX Benzene, toluene, ethylbenzene, xylenes
C&D Construction and Demolition
CAP Corrective Action Plan
CAPR Corrective Action Performance Report
CADR Corrective Action Design Report
CSA Comprehensive Site Assessment
DPE Dual-phase Extraction
EPA Environmental Protection Agency
ePATA Electronic Pre-Approval Task Authorization
EPH Extractable Petroleum Hydrocarbons
ESA Environmental Site Assessment
GCL Gross Contamination Level
LEL Lower Explosive Limit
LSA Limited Site Assessment
IPE di-Isopropyl Ether
ISCO In-situ Chemical Oxidation
MADEP Massachusetts Department of Environmental
Protection
MDL Method Detection Limit
MNA Monitored Natural Attenuation
MMPE Mobile Multi Phase Extraction
MSCC Maximum Soil Contaminant
Concentration
MSL Mean Sea Level
MSW Municipal Solid Waste
MTBE Methyl tertiary-Butyl Ether
NC North Carolina
NCAC NC Administrative Code
NCDENR NC Department of Environment and Natural
Resources
NCDEQ NC Department of Environmental
Quality
NCDOT NC Department of Transportation
NCDWM-SW NC Division of Waste Management’s Solid
Waste Section
NCDWM-UST NC Division of Waste Management’s UST
Section
NCDWQ NC Division of Water Quality
NFA No Further Action
NORR Notice of Regulatory Requirements
NORP Notice of Residual Petroleum
NOV Notice of Violation
NPDES National Pollutant Discharge
Elimination System
OVM Organic Vapor Meter
PID Photoionization Detector
PLC Programmable Logic Controller
POE Point of Entry (water treatment system)
POTW Publicly Owned Treatment Works
RBCA Risk Based Corrective Action
RDL Reporting Detection Limit
RP Responsible Party
SCFM Standard Cubic Feet per Minute
SVE Soil Vapor Extraction
STF Leaking UST State Trust Fund
STG Soil to Groundwater
TA Task Authorization
TCC Target Cleanup Concentrations
Terraquest Terraquest Environmental Consultants,
P.C.
TPH Total Petroleum Hydrocarbon
UST Underground Storage Tank
VOA Volatile Organic Analysis
VOC Volatile Organic Compound
VPH Volatile Petroleum Hydrocarbons
XP Explosion Proof

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 1 Troutman, Iredell County, NC
1.0 INTRODUCTION

On behalf of Madhukunj, LLC, Terraquest Environmental Consultants, P.C. has prepared this
Corrective Action Plan Record of Decision (CAP ROD) for the release incident at the Perth Mini
Mart facility located at 818 Perth Road, Troutman, Iredell County, NC. This work was requested
by the NCDWM-UST in a Notice of Regulatory Requirements (NORR) dated June 1, 2023 and costs
were pre-approved on ePATA 40784-024.

The site location and surrounding cultural features are depicted in Figure 1. The site vicinity is
depicted in Figure 2. The site layout and monitoring well network are depicted in Figure 3.
Appendix A contains the NC Division of Waste Management’s Underground Storage Tank
Section’s (NCDWM-UST) NORR requesting this CAP ROD and approval of a deadline extension
request.

2.0 UPDATE OF SITE HISTORY AND SOURCE CHARACTERIZATION

2.1 UST Owner:
The USTs are owned by Madhukunj, LLC.

2.2 Tank and Release Information:
According to the NC UST Database Records, two 6,000-gallon gasoline, one 4,000-gallon gasoline,
and one 2,000-gallon diesel USTs were installed at the site on March 4, 1980. Note that the
2,000-gallon diesel UST was converted to non-ethanol gasoline in 2018. A 2,000-gallon diesel
AST is also present onsite. The installation date of that tank is unknown. All USTs were closed
via excavation and removal in February 2019 as previously reported. Following closure, two new
12,000-gallon, gasoline, compartmentalized USTs were installed. A site history of the USTs and
AST on the property is included as Table 1. Previous tank locations are shown on Figure 3.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 2 Troutman, Iredell County, NC
In 2017, the UST owner noted inventory record discrepancies based upon ATG reading for UST
T3, the 4,000-gallon gasoline tank. In response, the UST owner submitted an UST-17A UST
Suspected Release 24-Hour Notice Form. The date and nature of the release is unknown but
inventory records show a shortage of approximately 300-400 gallons. Based on the lab results
of soil samples from beneath the other two gas USTs in the T3 basin, a release occurred from
those tanks also.

Terraquest is not aware of any AST release incidents.

The site and several properties in the area are commercial in nature with the remaining majority
used as residential as shown here:
SITE

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 3 Troutman, Iredell County, NC
The closest residence is located approximately 330 feet north of the release area. There are no
places of public assembly within 1,500 feet. Land use in the vicinity of the site is highway business
and residential. The site and properties to the east are zoned Highway Business (HB). Most of
the remaining properties are zoned Residential (RS). Zoning classifications of the site and
surrounding properties are depicted on Figure 2 and below as taken from Iredell County’s GIS
online system at https://iredell.connectgis.com.

Initial abatement of the release included the removal of fuel from the T3 UST and placing it in
temporary closure. All tanks were subsequently closed via removal.

Environmental assessment activities were previously detailed in a Site Check Report, LSA Report,
CSA Report, CAP Feasibility Study, and Corrective Action Design Report sent to the NCDWM-UST.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 4 Troutman, Iredell County, NC
2.3 Receptor Information

As part of the LSA and to determine the risk classification of the site, Terraquest personnel
previously performed a reconnaissance of properties within a 1,500-foot radius of the source
area. The reconnaissance effort consisted of obtaining tax department and local zoning
information on properties and conducting door-to-door visits of certain properties within 1,500
feet of the source area, in addition to collecting other pertinent information from the appropriate
local and state officials.

Terraquest personnel inspected all properties within 1,500 feet of the site and attempted to
contact all the property owners within 1,000 feet in person. Property owners within a 500 -foot
radius were questioned, if available, as to the source of their water and if any water supply wells
were located on their property. If owners/occupants were not home, a survey form was left at
their residence or forwarded to the property owners through the mail. In all cases, Terraquest
also conducted a visual survey of the property. Table 2 lists the names and addresses of
surrounding property owners. Note that the PIN Numbers presented in Table 2 correspond with
those shown in Figure 2.

Terraquest contacted the Town of Troutman’s Public Works Department to inquire about the
Town’s water supply system. Terraquest was put into contact with West Consultants, PLLC, who
maintains and operates the municipal supply system. Todd Poteet of West Consultants, PLLC,
verified water lines are available along Perth Rd. and Autumn Leaf Rd.; however, not along
Weddington Ln. Furthermore, since the subject area is not located within the jurisdictional
boundary of the Town of Troutman, property owners are not required to connect to the
municipal water supply system. Most are not interested in doing so as they would be annexed
into Troutman and its associated taxes.

Through the reconnaissance efforts, a total of thirty-three water supply wells were identified
within 1,500 feet or the source area. Of those identified wells, nineteen are sole source water

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 5 Troutman, Iredell County, NC
supply wells located within 1,000 feet. One additional active water supply well is located on the
site within 250 feet of the source area. That well is used to fill minnow tanks at the store. Water
supply well information is listed in Table 3. Supply well locations are depicted on Figure 2.

As part of the reconnaissance effort, Terraquest also searched for any surface water bodies
within a 500-foot radius of the site. An unnamed tributary of Big Branch originates off the
western property boundary of the site and is located within 500 feet of the source area. The NC
Division of Water Quality (DWQ) classifies Big Branch as a Water Supply-IV “Waters used as
sources of water supply for drinking, culinary, or food processing purposes.” The unnamed
tributary of Big Branch is depicted on Figure 2.

2.4 Regional Geology and Hydrogeology

The site is in the Piedmont Physiographic Region of North Carolina. According to the Geologic
Map of North Carolina (Brown, et al, 1985), the site is in the Charlotte Belt and is underlain by
mafic metavolcanic bedrock lithologies. On a regional scale, the Piedmont is characterized by
land with moderate relief and some areas of low relief hills and valleys.

Groundwater in the region is part of the Catawba River Basin. Regionally, groundwater flows to
the southwest and feeds into Big Branch Creek and ultimately Lake Norman. Big Branch Creek is
listed as a Water Supply IV surface water body at https://deq.nc.gov/about/divisions/water-
resources/planning/classification-standards/classifications#DWRPrimaryClassification which
classifies surface water bodies with a WSIV classification as “sources of water supply for drinking,
culinary, or food processing.”

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 6 Troutman, Iredell County, NC
The site’s location in reference to nearby water bodies as provided by the NCDEQ at
https://ncdenr.maps.arcgis.com/apps/webappviewer/index.html?id=6e125ad7628f494694e25
9c80dd64265 follows:

SITE
SITE

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 7 Troutman, Iredell County, NC
2.5 Site Geology and Hydrogeology

ENCOUNTERED LITHOLOGY
The following lithologies were encountered at the site during the installation of soil borings and
the monitoring well network:

0 – 63’ BGL SILT (CL)
Mostly soft to medium-stiff (generally increasing consolidation with depth),
micaceous, red to brown to tan, with trace clay and characteristics of saprolite in
areas.

63-70’ BGL SAPROLITE
Mostly tan/brown heavily-weathered rock.

The drilling locations of the monitoring wells used to describe the lithology are depicted on Figure
3. Geologic cross sections of the site are based upon the soil boring logs are as follows:

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 8 Troutman, Iredell County, NC

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 9 Troutman, Iredell County, NC

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 10 Troutman, Iredell County, NC
Depth-to-water measurements have been collected from the monitoring wells during various
stages of the assessment to estimate the direction of groundwater flow. Groundwater elevation
measurements were reduced to a common datum by surveying the relative elevation of the top
of the casing for each monitoring well. The water table elevation data as measured on January
18, 2023 was used to create a potentiometric surface map which illustrates the interpreted
direction and gradient of groundwater flow that is generally to the south/southwest as shown on
Figure 4. Recent groundwater elevation data and monitoring well construction information is
provided in Table 4. Historical groundwater elevation data is provided in Appendix B.

The groundwater elevation measurements from April 30, 2019 reveal that the hydraulic head
within the shallow phreatic aquifer ranged from a relative value of 66.61 at monitoring well MW5
to 67.91 at MW4. In conjunction with other site measurements, the results indicate flow in the
phreatic aquifer in a south/southwest direction under an average hydraulic gradient of
approximately 0.02.

Water level data from the Type III monitoring well (MW11) and the interpreted groundwater
elevation in the phreatic aquifer in the vicinity of the Type III well (based on MW5) were used to
determine if a vertical head gradient existed in the phreatic aquifer. The vertical head gradient
was calculated using the following equation and groundwater elevation data collected on April
30, 2019: Vg =�ℎ𝑝𝑝ℎ𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟− ℎ𝑀𝑀𝑀𝑀11�𝐷𝐷

where:

Vg = Vertical head gradient
Hphreatic = Water elevation in the shallow aquifer = 66.61’
HMW= Water elevation in deep well MW11 = 66.85’
D = The difference in elevation between the shallow water table and the
middle of the well screen in MW11 = (66.61 – 29.3) = 37.31’

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 11 Troutman, Iredell County, NC
Vertical head gradient:
𝑉𝑉𝑔𝑔=66.61 −66.8537.31

= -0.0064

The head gradient suggests a value very near zero indicating that it is transition zone between a
recharge and discharge area. This seems reasonable as the site is located near Lake Norman
where local groundwater and surface water discharge.

To provide preliminary estimates of hydraulic conductivity (K) and groundwater flow velocity (v)
for the phreatic aquifer, Terraquest personnel performed slug tests on monitoring wells MW3,
MW5, and MW7 on December 3, 2018 as part of the CSA.

The preliminary hydraulic conductivity estimates range from 0.176 to 0.427 feet per day. Using
an average hydraulic conductivity value of 0.336 feet/day, an average groundwater seepage
velocity was determined to be 16.35 feet per year. An effective porosity of 15 percent was
chosen based on published values of effective porosity for silt with the value skewed toward silty
sands based on a silt range of 3-19 percent and a silty sand range of fine to silty sand of 10-28
percent (Sanders, 1998). An average hydraulic gradient as measured on December 3, 2018 across
the site was used.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 12 Troutman, Iredell County, NC
2.6 Local Topography
The local topography is characterized by gently rolling, well rounded hills and long low ridges with
a few hundred feet of elevation difference between the hills and valleys. The majority of the
surrounding 1,000 feet of the site is mapped at approximately 800-900 feet above sea level. Local
topography is depicted in Figure 1.

2.7 Land Cover/Surface Drainage
The release area is currently overlain by asphalt as shown below. The property slopes to the
west, southwest behind the store where there are grass/gravel areas that precipitation can
infiltrate the ground.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 13 Troutman, Iredell County, NC
3.0 UPDDATE OF SITE ASSESSMENT INFORMATION

3.1 Soil Assessment

Through the 2017 Site Check, 2018 LSA, the 2019 UST closure, the 2019 over-excavation, and the
CSA, a total of fifty-seven samples were collected to delineate the extent of soil contamination.

The area of STG MSCC violation is generally centered on the UST basin with a smaller area around
the northern dispenser island. The volume of contamination is a sum of these two areas. With
an average depth to water of 31 feet in monitoring wells near the UST basin in April 2019, the
calculated tonnage at the site includes 1,220 tons near the basin and 15 tons at the northern
dispenser area. The area is shown here:

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 14 Troutman, Iredell County, NC
Note that Terraquest had discussions with the NCDWM-UST in 2019 prior to and during the UST
closure regarding further excavation of contaminated soil as it was exposed and readily available
to dig out. Ultimately, the Trust Fund did not authorize additional excavation. The RP chose to
dig out an additional 94.66 tons in the southwest direction from the UST basin as it extended
away in the direction where over six feet of product has been gauged. The limits of excavation
in the sloping direction of product flow were all still above the STG MSCCs including some
material that could have been excavated that was above the Residential MSCCs. Again,
Terraquest’s request to dig this material out was denied.

3.2 Groundwater Assessment

3.2.1 Monitoring Well Network

Throughout various phases of assessment, a total of twenty-two monitoring wells have been
installed to delineate groundwater quality. Those wells include twenty-one Type II wells and one
Type III telescoping deep well. The well locations are shown on Figure 3, their construction is
detailed on Table 4.

3.2.2 Groundwater Sampling

The latest groundwater monitoring includes sampling of monitoring wells MW1-17 on January
18, 2023, monitoring wells MW18, 19, and 20 on March 29, 2023, monitoring wells MW21 and
MW22 on May 2, 2023, and water supply wells WSW1, 2, 4, and 5 in July 2023. Monitoring wells
MW2, 3, MW15, 16, and 17 contained free product in January and were not sampled.

Prior to sampling, Terraquest field personnel purged at least three well volumes of water from
each well using a new disposable bailer that was then used to retrieve a representative sample.
Upon collection, samples were placed on ice pending transit to an NC-certified laboratory for

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 15 Troutman, Iredell County, NC
analysis. All wells were sampled for 6200B targeting VOCs found in the subject contaminant,
gasoline.

3.2.3 Groundwater Analytical Results

The analytical results of the sampling events reveal an oval-shaped plume that extends from
upgradient of the UST basin to downgradient past the furthest monitoring well MW21. The 2L
Standard violation plume, applicable to this High Risk site, measures 275 feet long by 110 feet
across at the widest point and covers an area of 20,800 square feet. The GCL violation plume
covers an area of 4,300 square feet and free product is estimated to cover an area of 1,000 square
feet. Figure 5 shows the extents of contamination that are also summarized in Table 5 along with
historical results. Historical free product thicknesses are summarized in Appendix B.

Further details of the results follow:
Free product (January 2023): MW2 (4.43’), MW3 (0.3’), MW15 (0.35’), MW16 (4.78’),
MW17(meter malfunction – product in bailer),
Free product (July 2023 pre MMPE): MW2 (0.69’), MW3 (0.33’), MW15 (0.05’), MW16 (2.44’),
MW17 (0.07’),
>GCL: MW5, MW6,
> 2L Standards: MW1, MW4, MW8, MW10-13,
<2L Standards: MW7, MW9, MW14, WSW1, WSW2, WSW4.

The vertical extent of groundwater contamination was estimated based upon the concentrations
noted in the Type III (MW11) groundwater monitoring well. Petroleum-type compounds were
reported above the 2L Groundwater Standards in the deep well that is screened from 65-70 feet
BGL. The estimated vertical extent of 2L Standard violations in groundwater is approximately 80
feet BGL.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 16 Troutman, Iredell County, NC
3.3 Free Product Assessment and Recovery

Discovery:
Prior to developing monitoring wells MW2 – MW4 on June 19, 2018, monitoring wells were
visually checked for the presence of free product with a bailer prior to their development. At
that time, free product was observed in monitoring well MW2. Product was subsequently
discovered in monitoring well MW2 on May 9, 2022, MW15 on September 23, 2021, MW16 on
September 23, 2020, and in monitoring well MW17 on March 22, 2021. Historical groundwater
elevations and product thicknesses are detailed in Appendix B.

MW16 7/10/23 before MMPE:

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 17 Troutman, Iredell County, NC
Initial recovery:
Initial MMPE events were conducted for this release incident as authorized on ePATAs 40784-
002 and on 40784-007. Both five-day events focused on free product removal from the sole well
that it has been gauged in, MW2. MMPE services was provided by Zava Industrial, Inc. for the
October 22-26, 2018 event and by EarthX, Inc. for the April 22-26, 2019 event. The October 2018
event was successful in removing 4,041 gallons of liquid and the April 2019 event recovered 3,461
gallons. The October event reported emissions of 56.86 gallons and the April 2019 event had
64.23 gallons reported.

Free product delineation:
Following a high-resolution study conducted in June 2020, additional monitoring wells MW15,
MW16, and MW17 were installed by an NC-licensed driller on September 22-23, 2020 at
previously selected locations validated by the high-res data. Their locations around MW2 are
shown on the enclosed Figure 3. Table 4 shows well construction details. The screen intervals
were extended above the water table on all three wells to capture the product at shallower
depths as is typical well construction policy.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 18 Troutman, Iredell County, NC
The high-resolution study identified higher concentrations within the analyzed area as follows:

MW2

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 19 Troutman, Iredell County, NC
Product locations and water table fluctuations:
As apparent from water table fluctuations and data from the high resolution study, several areas
of free product are present vertically at the site. Greater product thicknesses were noted when
the water table is lower. The majority of free-phase product is located 30 to 40 feet BGL.
Supporting information is as follows:

Date
MW2 Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
6/25/2018 6.25 61.95
10/22/2018 7.05 62.60
12/3/2018 5.63 63.68
4/22/2019 4.11 66.83
7/24/2019 2.85 67.06
9/23/2020 4.12 67.11
3/22/2021 3.08 69.56
0
1
2
3
4
5
6
7
8
60.00 62.00 64.00 66.00 68.00 70.00
MW2 Free Product Thickness (feet)

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 20 Troutman, Iredell County, NC
Free product evaluation:
On September 23, 2020, Terraquest personnel used a disposable bailer to remove product from
monitoring well MW2 and subsequently record the rate of its return as requested by the
NCDWM-UST. Personnel bailed product from an initial thickness of 4.12 feet at static conditions
to a thickness of 0.25 feet that repeatedly showed up through several bails. As product was
bailed from the well, it was temporarily placed into a 5-gallon bucket at the well. When that
bucket filled, the contents were transferred to a transport can during which time the well would
fill back up with 6-8" of product. Complete removal of the product was not possible. In total,
over six gallons of product were removed through the efforts and later disposed of offsite in an
environmentally-sound manner. In summary, those efforts amount to a six-gallon recovery via
hand bailing in half an hour. Following the half-hour of bailing, the rate of return was recorded
for two hours following the bailing as detailed in tabular and graphical form:

Time
Top of
Casing
Elevation
(feet)
Depth to
Product from
Top of Casing
(feet)
Depth to
Water from
Top of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation (feet)Comments
Type II Groundwater Monitoring Well
9:15:00 AM 97.83 28.58 32.70 4.12 68.14
9:45:00 AM 97.83 29.83 30.08 0.25 67.93
9:50:00 AM 97.83 29.69 30.00 0.31 68.06
9:55:00 AM 97.83 29.65 30.00 0.35 68.09
10:00:00 AM 97.83 29.66 30.05 0.39 68.06
10:05:00 AM 97.83 29.63 30.02 0.39 68.09
10:10:00 AM 97.83 29.60 29.97 0.37 68.13
10:15:00 AM 97.83 29.58 29.95 0.37 68.15
10:20:00 AM 97.83 29.55 29.94 0.39 68.17
10:25:00 AM 97.83 29.55 29.94 0.39 68.17
10:30:00 AM 97.83 29.55 29.95 0.40 68.17
10:35:00 AM 97.83 29.55 29.94 0.39 68.17
10:40:00 AM 97.83 29.55 29.95 0.40 68.17
10:45:00 AM 97.83 29.55 29.95 0.40 68.17
10:50:00 AM 97.83 29.55 29.94 0.39 68.17
10:55:00 AM 97.83 29.54 29.95 0.41 68.18
11:00:00 AM 97.83 29.54 29.95 0.41 68.18
11:05:00 AM 97.83 29.53 29.94 0.41 68.19
11:10:00 AM 97.83 29.52 29.94 0.42 68.20
11:15:00 AM 97.83 29.52 29.93 0.41 68.20
11:20:00 AM 97.83 29.51 29.93 0.42 68.21
11:25:00 AM 97.83 29.50 29.92 0.42 68.22
11:30:00 AM 97.83 29.50 29.92 0.42 68.22
11:35:00 AM 97.83 29.50 29.92 0.42 68.22
11:40:00 AM 97.83 29.49 29.92 0.43 68.22
11:45:00 AM 97.83 29.48 29.91 0.43 68.23
11:50:00 AM 97.83 29.48 29.90 0.42 68.24
11:55:00 AM 97.83 29.48 29.90 0.42 68.24
12:00:00 PM 97.83 29.48 29.90 0.42 68.24
Product removed from well with disposable bailer for half an hour. Could not remove product to a thickness less than 3". Removed product was placed into a 5-gallon bucket. When that
bucket was transferred to a transport can, the well would fill back up with 6-8" of product. Complete removal of the product was not possible.
0.23
0.28
0.33
0.38
0.43
0.48
9:45:00 AM9:50:00 AM9:55:00 AM10:00:00 AM10:05:00 AM10:10:00 AM10:15:00 AM10:20:00 AM10:25:00 AM10:30:00 AM10:35:00 AM10:40:00 AM10:45:00 AM10:50:00 AM10:55:00 AM11:00:00 AM11:05:00 AM11:10:00 AM11:15:00 AM11:20:00 AM11:25:00 AM11:30:00 AM11:35:00 AM11:40:00 AM11:45:00 AM11:50:00 AM11:55:00 AM12:00:00 PMFree Product Thickness (feet)
Free Product Thickness (feet)

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 21 Troutman, Iredell County, NC
Additional recovery efforts:
On April 10, 2023, Terraquest supervised the start of an MMPE event to recover free product.
Vacuum services were provided by EarthX, Inc. The event began on Monday, April 10, 2023 and
lasted through Friday, April 14, 2023. Vacuum was applied to monitoring wells MW2, MW3,
MW15, MW16, and MW17 throughout the event. A total of 7,155 gallons of a mix of free product
and contaminated groundwater were recovered through the event. An additional 27.29 gallons
was emitted through the exhaust stack.

On July 10, 2023, Terraquest supervised the start of an MMPE event to recover free product.
Vacuum services were provided by EarthX, Inc. The event began on Monday, July 10, 2023 and
lasted through Friday, July 14, 2023. Due to the excessive outdoor temperatures, the unit shut
off several times and overall recovery was lower than previous events have been. Vacuum was
applied to monitoring wells MW2, MW3, MW15, MW16, and MW17 throughout the event. A
total of 1,000 gallons of a mix of free product and contaminated groundwater were recovered
through the event. An additional 19.68 gallons was emitted through the exhaust stack.

As noted in Table 5, no free product was gauged in monitoring wells at the conclusion of the
event. Historically, free product has equilibrated and presented itself in the wells at some time
following vacuum events.

3.4 Contaminant Fate and Transport Modeling

Terraquest performed contaminant fate and transport modeling to determine the true risk of
groundwater contamination. That included consideration of the free product and dissolved-
phase GCL violations onsite, aquifer characteristics, and the presence of an active, sole-source
water supply well located 595 feet downgradient. The risk is determined to be high under current
conditions, however, additional modeling conducted with the removal of free product and GCL
violations indicates the well will not likely be impacted and the risk of the release incident at that
point would be Low Risk.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 22 Troutman, Iredell County, NC
Bioscreen version 1.4 is a Microsoft Excel-based screening model that simulates remediation
through natural attenuation. This modeling software was chosen as:

1. Relatively simple groundwater flow conditions are present in terms of the
horizontal travel of the contaminant plume that mocks groundwater flow direction. The
site geology has been logged as a fairly homogenous silt although the presence of clay
and consolidation does vary but only slightly.

2. There is not a strong vertical gradient so ignoring that component is reasonable.
The modeling will show that even without consideration of the vertical gradient, the
advancing plume will not reach the sensitive receptor horizontally.

3. More sophisticated computer models would require additional assessment that is
outside the scope of trust fund reimbursement. If those models were run with the
current data, the number of assumptions made would reduce the accuracy to that of the
2D modeling efforts of Bioscreen.

Chosen as the point to model against, water supply well WSW10 is the closest downgradient
active receptor. It is located 595 feet downgradient at 105 Spicewood Circle. A baseline case
was simulated using a seepage velocity of 16 feet/year, no retardation, and a conservative first-
order decay coefficient of 0.35. The source concentration was set near saturation levels (150
mg/L) due to the large presence of free product. That free product and associated overlying soil
contamination was considered when choosing a soluble mass of 28,415655 kg. The simulation
time was run out to 50 years.

As part of the model calibration and modeling effort, it is necessary to alter various model inputs
within reasonable ranges to determine the sensitivity of the model to those changes.
Understanding the sensitivity of the inputs to change is very critical for uncertain parameters.
Inputs were varied for Runs 002 – 012 to determine model sensitivity to the inputs. Once a

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 23 Troutman, Iredell County, NC
calibrated model was chosen, Runs 013 and 014 were conducted with reduced contaminant
concentrations to model conditions following remediation to concentrations below GCL values.
Run 013 was conducted using a contaminant concentration that represents a bulk VOC number
while run 014 is representative of benzene present at the GCL concentration. As benzene is the
lone GCL concentration in wells outside of the product plume and has the strictest (lowest) GCL
value, this is reasonable. Table 6 provices a summary of the results.

Chosen model inputs:
After analyzing the effect on model runs as the different inputs were altered, Terraquest chooses
Run 012 as the most probable scenario. This choice involves a 15 ft/year seepage velocity, a 1
retardation, a 0.35 first-order decay coefficient, a 50-foot contaminant thickness, and a 28,415
kg soluble mass. As shown on the attached Bioscreen Modeling Inputs and BIOSCREEN
MODELING INPUTS AND NOTES table, “The large amount of product provides an ongoing
secondary source that will feed migration for a very long time. …..groundwater contamination
will arrive at downgradient water supply wells and continue to contaminate them for a long time
without further treatment.”

Models conducted with data representing removal of product and GCL violations:
Benzene is the lone GCL violation in the dissolved-phase plume at this site. It also has the strictest
(lowest) GCL value. Having previously determined that the release incident is from gasoline, a
VOC, and not from an SVOC, it is reasonable to model benzene as a representing compound of
what will migrate toward the sensitive receptor. Run 014 was conducted using a 5 mg/L
concentration as the C source as that is the benzene GCL. Once treatment at this site removes
all GCL violations, it does not appear likely that the downgradient water supply well will become
impacted.

Modeling conclusions:
The subject release incident has had free-phase petroleum product at thicknesses as great as
seven (7) feet. That thickness has been reduced via MMPE events to around five (5) feet and is

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 24 Troutman, Iredell County, NC
present in multiple wells downgradient of the UST system. The depth to water is thirty (30) feet
below ground level, indicating that there is a large amount of contaminated soil above it to
provide that much product. Excavation was halted by the NCDWM-UST so that contaminant
mass largely remains in place. The release incident was detected by the UST system's ATG system
in 2017. With the passing of five years and the data obtained from product gauging and
monitoring well sampling, some basic migration trending is possible. The large amount of
product provides an ongoing secondary source that will feed migration for a very long time. The
characteristics discerned from soil lithology study during well installation and aquifer slug testing
analysis provide good inputs to run this model. As shown in the model results above,
groundwater contamination will arrive at downgradient water supply wells and continue to
contaminate them for a long time without further treatment. However, once treatment at this
site removes all GCL violations, it does not appear likely that the downgradient water supply well
will become impacted.

4.0 OBJECTIVES FOR CORRECTIVE ACTION AT THE SITE

This Corrective Action Plan Record of Decision was requested by the NCDWM-UST’s Mooresville
Regional Office in an NORR dated June 1, 2023. Appendix A contains a copy of the NORR and an
approval correspondence to Terraquest’ s request for a deadline extension request.

CAP Purpose and Objective:
The purpose and objective of this CAP is to remove free product and reduce the dissolved-phase
groundwater contamination on the subject property with active treatment, thus preventing
further offsite migration and better protecting against contamination of the downgradient water
supply wells. The offsite (downgradient) portion of the plume will be treated through monitored
natural attenuation.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 25 Troutman, Iredell County, NC
Contaminant Extent:
The STG MSCC extent covers two areas. Contamination around the former USTs measures 42
feet by 40 feet and the contamination near the norther dispenser island measures 18 feet by 8
feet. The 2L Standard violation plume, applicable to this High Risk site, measures 275 feet long
by 110 feet across at the widest point and covers an area of 20,800 square feet. The GCL violation
plume covers an area of 4,300 square feet and free product is estimated to cover an area of 1,000
square feet.

Contaminant Mass:
Soil contaminant mass:
Based on a known mass of contaminated soil and known mass of smear zone, a mass of
contaminant can be estimated using the known contaminant/mass values from
laboratory results. Using an average contamination value of 2,325 mg/kg from
assessment results and the previously stated 1,220 tons + 15 tons = 1,270 tons of
contaminated soil/smear zone, the following calculations yield a soil contamination mass
of 5,893 pounds.

2,325 mg/kg x (1,270 tons x (907.185 kg / 1 US ton)) =
2,325 mg/kg x (1,152,125 kg) = 2,678,690,625 mg of contamination
2,678,690,625 mg / 1,000,000 mg/kg = 2,679 kg
2,679 kg x 2.2 pounds/kg = 5,893 pounds

Free-phase product mass:
1,000 ft2 x 0.7-foot average product thickness = 700 ft3 x 7.48 gal/ft3 x 6.25 lbs/gal =
32,725 pounds

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 26 Troutman, Iredell County, NC
Dissolved-phase contaminant mass (GCL violation):
4,300 ft2 x (10 feet beyond bottom of 50 foot wells – DTW 32’ = 60-32=28) = 120,400 ft3
x 28.3 L/ft3 = 3,407,320 L of GCL water. Average GCL violation wells on 1/2023 = 41,302
ug/L. 3,407,320 L of GCL water x 41,302 ug/L x 2.20462e-9 ug/lbs =310 pounds.

Contaminant Standards:
The soil cleanup standards for this High Risk site are the STG MSCCs. The groundwater cleanup
standards for this site are the 2L Standards.

Contamination Migration and Impact:
The possibility of contaminating downgradient sensitive receptors and the establishment of
alternate cleanup standards was investigated by Terraquest through computer modeling. As
noted through modeling efforts, groundwater contamination will arrive at downgradient water
supply wells and continue to contaminate them for a long time without active treatment.
Modeling also concludes that once treatment at this site removes all GCL violations, it does not
appear likely that the downgradient water supply well will become impacted.

5.0 REMEDIAL ACTION IMPLEMENTATION

5.1 Basis for Selection of the Specific Design
A Corrective Action Plan Feasibility Study was submitted to and approved by the NCDWM-UST
for this release incident. That Study recommended SVE and air sparging as active treatment
methods as both methods proved practical during pilot testing. Other methods considered
include excavation, MMPE, passive and active product bailers, natural attenuation, in-situ
blending/injection, pump and treat, and dual-phase extraction. Those methods were discounted
either due to cost, the large presence of product, or lack of protection to sensitive receptors.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 27 Troutman, Iredell County, NC
5.2 Remedial System Design
The design of the SVE and air sparge systems are detailed in the Bid Specification Documents
contained in Appendix C. The primary system components include an SVE regenerative blower
equal to or better than a GAST R7100A-3 connected to a vapor processing unit of similar or better
quality as a FALCO 300 unit. Air sparging will be accomplished with a rotary screw-type
compressor of equal or better quality as an Ingersoll Rand UP6 10 HP 125 cfm (2080V 3PH).

Flow and pressure considerations for the SVE equipment are based on vacuum requirements
from pilot testing that showed vacuum up to 54 inches of water with associated vacuum air flow
of 20 cfm. Allowing for heterogeneities in the soil matrix and adding flow from ten total wells,
overall performance of the selected blower is 65 inches of water and 200 cfm air flow. The
necessary pressure and flow of the air sparge system is based on pilot testing and includes air
flow of 4 cfm for each of seven (7) wells for a total air demand of 28 cfm. The associated pressure
from pilot testing was 17 psi and an additional 50% is requested to allow for deviations (26psi).

SVE and air sparge trenching was laid out in a sensible straight-line pattern to reduce trenching
and associated costs. The returning vacuum pipe and hose conduits will arrive at a concrete pad
that the SVE and air sparge equipment will be bolted to. A fence and roof will be constructed
over the equipment pad for security and to reduce heat and weather exposure. Further details
are provided in the bid documents in Appendix C. CAP layout details are shown on Figure 6.

5.3 Bidding
Bids were sent to the following vendors in July 2022:
1. Piedmont Industrial Services
2. PRD, Inc.
3. Product Recovery Management, Inc.
4. S&G Remediation Services LLC
5. South Atlantic Environmental Drilling and Construction Company, Inc.
6. Zava Industrial, Inc.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 28 Troutman, Iredell County, NC
Bids were returned from five of the six vendors. PRD, Inc. declined to bid. The returned bids
are provided in Appendix C. The returned bid amounts were as follows:

Equipment

$138,775 Piedmont Industrial Services
NO BID PRD, Inc.
$121,967.25 Product Recovery Management, Inc.
$129,500 S&G Remediation Services LLC
$122,000 South Atlantic Environmental Drilling and Construction Company, Inc.
$144,462 Zava Industrial, Inc.

Installation

$82,998.13 Piedmont Industrial Services
NO BID PRD, Inc.
$85,962.10 Product Recovery Management, Inc.
$52,095 S&G Remediation Services LLC
$169,900 South Atlantic Environmental Drilling and Construction Company, Inc.
$90,740 Zava Industrial, Inc.

5.4 Remediation System Implementation Schedule
Following submittal of this ROD, the following schedule is anticipated:

• one month is anticipated for the NCDWM-UST to review the ROD and respond,
• one month is anticipated for all parties to meet and sign the ROD,
• one month is anticipated for rebidding of system equipment and installation costs,
• one week is anticipated for pre-approval of the system costs and supervised installation,
• six months are anticipated for construction of the system,
• three months are anticipated for installation, inspection approval, utility construction
and activation,
• one month is anticipated to schedule system startup.

Thirteen months and one week are anticipated until the treatment system will be turned on.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 29 Troutman, Iredell County, NC
Following system activation, Terraquest expects the majority of free product will be removed
within the first year of system operation with another year to get it down to small pockets and
water-table fluctuation trapped areas. The surrounding dissolved-phase contaminant plume will
be reduced during these first several years of operation and another year or two will likely be
needed to get concentrations below the GCLs to suspend system operation and monitor natural
attenuation. Following a year of monitored natural attenuation, it may be possible to reduce the
risk ranking of this site and move toward closure.

In total, it will take thirteen months and two weeks to activate the system, 3-4 years of operation
to remove the bulk of the contamination, and another year to monitor natural attenuation and
close the incident. Without any alterations or delays to this schedule, a Notice of No Further
Action could be release in October 2029. While it is possible that this could be accomplished
quicker, experience has shown that it will most likely take longer.

5.5 Active Remediation Progress Milestones (Monitoring)
Free product measurements will be collected in conjunction with groundwater sampling events
to analyze if the projected remedial rate of product removal in the first year is on target. Product
measurements and groundwater sampling will be conducted quarterly for the first year and semi-
annually thereafter. Groundwater samples will be submitted for VOC analysis per method 6200B.
Contaminant mass can be calculated, and the treatment rates compared against the proposed
timeline to assess effectiveness.

5.6 Remedial system operation and maintenance plan:
System operation and maintenance per manufacturer’s specifications will be made to the extent
possible within the eight hours per month allowed by the NCLUST Trust Fund. (3 hours SVE, 3
hours air sparge, 2 hours free product removal)

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 30 Troutman, Iredell County, NC
5.7 Anticipated costs

The estimated costs for the treatment of contamination through project closure total
$496,909.75. The costs included are: installation of wells, purchase and installation of an SVE
and air sparge system (based on year-old bids), operation and monitoring costs, Notice of
Residual Petroleum, Public Notice, and well abandonment. Costs are detailed in Table 7.

6.0 PUBLIC NOTICE

Copies of public notice of the proposed corrective action are provided in Appendix D as required.

7.0 LIMITATIONS

This report is limited to the investigation of dissolved petroleum hydrocarbons, such as gasoline,
in groundwater and does not imply that other unforeseen adverse impacts to the environment
are not present at or around the Perth Mini Mart property located in Troutman, Iredell County,
North Carolina. In addition, subsurface heterogeneities not identified during this study may
influence the migration of groundwater or contaminants in unpredicted ways. The limited
amount of sampling and testing conducted during this study cannot practically reveal all
subsurface heterogeneities. Furthermore, the subsurface conditions, particularly groundwater
flow, elevations, and water quality may very through time. The opinions and conclusions arrived
at in this report are in accordance with North Carolina Department of Environmental Quality
regulations and guidelines and industry-accepted geologic and hydrogeologic practices at this
time and location. No warranty is implied or intended.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 31 Troutman, Iredell County, NC
REFERENCES

Brown, et al., 1985. Geologic Map of North Carolina, North Carolina. Department of Natural
Resources and Community Development, 1:500,000 scale.

Sanders, Laura L. 1998. A Manual of Field Hydrogeology. Upper Saddle River, New Jersey: Prentice
Hall Inc.: 196.

CAP Record of Decision Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 818 Perth Road
Date: August 14, 2023 32 Troutman, Iredell County, NC
CERTIFICATION

1 Enter the date the Corrective Action Plan was due. 9/1/2023 Will this Corrective Action Plan
Feasibility Study be submitted after the established due date?
YES NO X
2 Was any recommended information from the above template missing from this report? YES NO X
(IF the answer to question #1 or# 2 is “YES”, please replace this note with additional information in this cell to explain what was missing and why.)
3 Are there any known or suspected factors that could prohibit risk reclassification and the use of
monitored natural attenuation to risk-based cleanup standards following the completion of two
years of active remediation under the proposed strategy?
YES NO X
(IF the answer to question #3 is “YES”, please replace this note with a short description of the possible reason(s), and outline proposed remedies. Greater detail should be provided in the report text above.)
4 Does any potential continuing source for the known contamination onsite remain (e.g., an existing,
operating system onsite where a leaking component directly responsible for the discovered release
has not been found and repaired/replaced, etc.)?
YES NO X
5 Does any known or suspected source zone soil contamination or free product remain outside of the
assessed area that could inhibit the effectiveness of the proposed strategy?
YES NO X
6 Since release discovery, has there been any unexpected increase in contaminant mass sufficient to
suggest a potential new release from a separate onsite or offsite source?
YES NO X
(IF the answer to any question from #4 - #6 is “YES”, replace this note with a short description of any recommended actions to address, assess, or clean up any
other known, suspected, or potential source. Greater detail should be provided in the report text above.) 6 Certification:
I, Michael J. Brown, a Licensed Geologist and I, John S. Haselow, a Licensed Engineer in the State of North
Carolina for TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. do certify that the information contained in
this report is correct and accurate to the best of my knowledge. All work was performed under my direct
supervision. My seal and signature are affixed below. Additional seals and/or signatures are also listed.

Terraquest Environmental Consultants, P.C. is licensed to practice geology and engineering in North Carolina.
The geology certification number of the corporation is C-291. The engineering certification number of the
corporation is C-4634. Engineering is practiced out of the Cary, NC office.

TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C.

Ryan D. Kerins Michael J. Brown, P.G. John Haselow, PhD, PE
Project Manager President Senior Engineer
Ronald H. Taraban
Wayne Randolph
Brad C. Newton, Hydrogeologist

TABLES

Table 1
Date: 8/9/23 Facility ID No: 0-0024524
Capacity
UST Product (Gallons)Release Discovered
T1 Gasoline 6,000 3/4/80 2/25/19 Yes
T2 Gasoline 6,000 3/4/80 2/25/19 Yes
T3 Gasoline 4,000 3/4/80 2/25/19 Yes
T4 Non-ethanol gasoline*2,000 3/4/80 2/19/19 No
AST1 Diesel 2,000 unknown Active No
T5**Gasoline 12,000 2/27/19 Active No
T6**Gasoline 12,000 2/27/19 Active No
Notes:
1. Information obtained from the North Carolina UST Database Records and field observations.
2. * Tank T4 held diesel fuel until its conversion to non-ethanol gasoline in 2018.
3. ** Tanks are compartmentalized.
4. Tanks T1-T4 were of single-walled steel construction. T5 and T6 are double-walled fiberglass.
Active USTs/AST
SITE HISTORY (UST/AST SYSTEM INFORMATION)
Incident Name: Perth Mini Mart Incident No. 40784
Date Installed Date Closed
Closed USTs
Table 2
Date: 8/9/23 Facility ID: 0-0024524Tax Parcel Number
(PIN Number)Property Owner Property Owner Address Property Address
Pennell, Gary & Sherry PO Box 712 131 Weddington Lane
Troutman, NC 28166 Troutman, NC 28166
Tsitouris, Steve & Michael 569 Autumn Leaf Road 569 Autumn Leaf Road
Troutman, NC 28166 Troutman, NC 28166
Geiger, Lee and Katie 782 Perth Road 782 Perth Road
Troutman, NC 28166 Troutman, NC 28166
TCJ Development, LLC PO Box 3395 803 Perth Road
Mooresville, NC 28117 Troutman, NC 28166
Thompson, Wayne PO Box 236 858 Perth Road
et al Claremont, NC 28610 Troutman, NC 28166
Madhukunj, LLC 135 Corona Circle 818 Perth Road
Mooresville, NC 28115 Troutman, NC 28166
Notes:
1. Information gathered from field interviews and Iredell County Geographic Information System.
2. Last 4 digits of MAP ID numbers correspond with those displayed on Figure 2.
SURROUNDING PROPERTY OWNERS
Incident Name: Perth Mini Mart Incident No.: 40784
SITE
4730-63-9494
4730-69-9930
4730-79-2000
4730-79-2777
4730-79-4555
4731-50-7091
Table 3
Date: 8/9/23 Facility ID: 0-0024524
Well Depth Type Casing Depth Screen Interval Distance from Source
Well ID No. Well Owner/Address Well Address Well Use (feet BGS)of Well (feet BGS)(feet BGS)Area of Release (feet)
Madhukunj, LLC
WSW1 135 Corona Circle 818 Perth Road Active 170 Drilled 95 95-170 107
Mooresville, NC 28115 Troutman, NC 28166 (minnow tank in store)
Tsitouris, Steve & Michael
WSW2 569 Autumn Leaf Road 569 Autumn Leaf Road Secondary Source uknown Drilled uknown uknown 447
Troutman, NC 28166 Troutman, NC 28166
TCJ Development
WSW3 PO Box 3395 562 Autumn Leaf Road Inactive uknown Drilled uknown uknown 464
Mooresville, NC 28117 Troutman, NC 28166
Pennell, Gary & Sherry
WSW4 PO Box 712 117 Weddington Lane Sole Source unknown Drilled uknown uknown 384
Troutman, NC 28166 Troutman, NC 28166
Upright, Renny & Debbie
WSW5 547 Autumn Leaf Road 547 Autumn Leaf Road Sole Source uknown Drilled uknown uknown 614
Troutman, NC 28166 Troutman, NC 28166
TCJ Development
WSW6 PO Box 3395 795 Perth Road Sole Source uknown Drilled uknown uknown 541
Mooresville, NC 28117 Troutman, NC 28166
Grant, Nancy & Jeffrey
WSW7 782 Perth Road 782 Perth Road Sole Source uknown Drilled uknown uknown 582
Troutman, NC 28166 Troutman, NC 28166
Pennell, Gary & Sherry
WSW8 PO Box 712 131 Weddington Lane Sole Source 90 Drilled unknown unknown 534
Troutman, NC 28166 Troutman, NC 28166
Thompson, K. Wayne
WSW9 PO Box 886 858 Perth Road Sole Source 300 Drilled unknown unknown 679
Troutman, NC 28166 Troutman, NC 28166
Thompson, Tommy
WSW10 855 Perth Road 105 Spicewood Circle Sole Source unknown Drilled unknown unknown 595
Troutman, NC 28166 Troutman, NC 28166
Geiger, Lee
WSW11 533 Autumn Leaf Road 533 Autumn Leaf Road Sole Source unknown Drilled unknown unknown 923
Troutman, NC 28166 Troutman, NC 28166
TCJ Development
WSW12 PO Box 3395 532 Autumn Leaf Road Sole Source unknown Drilled unknown unknown 1000
Mooresville, NC 28117 Troutman, NC 28166
Brown, Gertrude P Heirs
WSW13 9117 J Ruth Street 785 Perth Road Sole Source unknown Drilled unknown unknown 1148
Mount Pleasant, NC 28124 Troutman, NC 28166
Weber, Glenn & Rozelle
WSW14 765 Perth Road 765 Perth Road Sole Source unknown Drilled unknown unknown 1267
Troutman, NC 28166 Troutman, NC 28166
Weber, Glenn & Rozelle
WSW15 765 Perth Road 765 Perth Road Inactive unknown Bored unknown unknown 1192
Troutman, NC 28166 Troutman, NC 28166
Cowan, Hugh
WSW16 755 Perth Road 755 Perth Road Sole Source unknown Drilled unknown unknown 1322
Troutman, NC 28166 Troutman, NC 28166 2-inch
Cowan, Hugh
WSW17 755 Perth Road 755 Perth Road Inactive unknown Bored unknown unknown 1313
Troutman, NC 28166 Troutman, NC 28166
Weber, Glenn & Rozelle
WSW18 765 Perth Road 106 Weddington Lane Inactive unknown Drilled unknown unknown 1098
Troutman, NC 28166 Troutman, NC 28166 2-inch
Wagner, Betty etal
WSW19 2795 Westonridge Dr.129 Weddington Lane Sole Source unknown Drilled unknown unknown 659
Cincinnati, OH 45239 Troutman, NC 28166
Wagner, Betty & Michael
WSW20 PO Box 464 120 Weddington Lane Sole Source unknown Drilled unknown unknown 916
Troutman, NC 28166 Troutman, NC 28166
Guentner, Gregory & Julie
WSW21 397 Isle of Pines Road 146 Weddington Lane Sole Source unknown Drilled unknown unknown 833
Mooresville, NC 28115 Troutman, NC 28166 2-inch
Coffey, Robert & Rebecca
WSW22 PO Box 1094 165 Weddington Lane Sole Source unknown Drilled unknown unknown 826
Troutman, NC 28166 Troutman, NC 28166
American IRA, LLC
WSW23 242 Templeton Road 104 Spicewood Circle Sole Source unknown Drilled unknown unknown 814
Mooresville, NC 28117 Troutman, NC 28166
Haynes, Larry
WSW24 118 Spicewood Circle 118 Spicewood Circle Sole Source unknown Drilled unknown unknown 893
Troutman, NC 28166 Troutman, NC 28166
Neel, Henry
WSW25 PO Box 245 123 Spicewood Circle Sole Source unknown Drilled unknown unknown 731
Troutman, NC 28166 Troutman, NC 28166
Sherrill, Shirley
WSW26 PO Box 73 129 Spicewood Circle Sole Source unknown Drilled unknown unknown 780
Troutman, NC 28166 Troutman, NC 28166
Phelps, Gary
WSW27 147 Spicewood Circle 147 Spicewood Circle Sole Source unknown Drilled unknown unknown 830
Troutman, NC 28166 Troutman, NC 28166
Shoemaker, Nancy
WSW28 151 Spicewood Circle 151 Spicewood Circle Sole Source unknown Drilled unknown unknown 880
Troutman, NC 28166 Troutman, NC 28166
Davis, Shelly
WSW29 153 Spicewood Circle 153 Spicewood Circle Sole Source unknown Drilled unknown unknown 1,131
Troutman, NC 28166 Troutman, NC 28166
Gilleland, Marilyn
WSW30 294 Spicewood Circle 294 Spicewood Circle Sole Source unknown Drilled unknown unknown 1,019
Troutman, NC 28166 Troutman, NC 28166
Sparrow, Warner
WSW31 104 Nutmeg Lane 104 Nutmeg Lane Sole Source unknown Drilled unknown unknown 1,088
Troutman, NC 28166 Troutman, NC 28166
Wilcox, Robert
WSW32 138 Spicewood Circle 138 Spicewood Circle Sole Source unknown Drilled unknown unknown 1,050
Troutman, NC 28166 Troutman, NC 28166
Wittie, Richard
WSW33 171 Spicewood Circle 171 Spicewood Circle Sole Source unknown Drilled unknown unknown 1,475
Troutman, NC 28166 Troutman, NC 28166
Notes:
1. "BGS" = feet below ground surface, .
2. Information obtained from Terraquest field interviews & Iredell County GIS
3. Well ID numbers are displayed on Figure 2.
WATER SUPPLY WELL INFORMATION
Incident Name: Perth Mini Mart Incident No.: 40784
Table 4
Date: 8/9/23 Facility ID: 0-0024524
Well ID Date Installed
Date Water
Level
Measured
Screened Interval (x
to y feet BGS)
Bottom of Well
(feet BGS)
Top of
Casing
Elevation
(feet)
Depth to Water
from Top of
Casing (feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation (feet)Comments
MW1 1/16/18 1/18/23 30-50 50 98.78 32.76 0 66.02 Type II Groundwater Monitoring Well
MW2 6/18/18 1/18/23 30-50 50 97.83 35.63 4.43 65.44 Type II Groundwater Monitoring Well
MW3 6/18/18 1/18/23 30-50 50 98.54 33.1 0.3 65.66 Type II Groundwater Monitoring Well
MW4 6/19/18 1/18/23 30-50 50 99.68 33.13 0 66.55 Type II Groundwater Monitoring Well
MW5 11/26/18 1/18/23 30-50 50 96.31 31.25 0 65.06 Type II Groundwater Monitoring Well
MW6 11/26/18 1/18/23 30-50 50 97.53 32.44 0 65.09 Type II Groundwater Monitoring Well
MW7 11/26/18 1/18/23 30-50 50 99.37 33.05 0 66.32 Type II Groundwater Monitoring Well
MW8 11/27/18 1/18/23 30-50 50 98.72 33.27 0 65.45 Type II Groundwater Monitoring Well
MW9 11/27/18 1/18/23 30-40 40 89.72 23.96 0 65.76 Type II Groundwater Monitoring Well
MW10 11/28/18 1/18/23 30-40 40 90.75 25.30 0 65.45 Type II Groundwater Monitoring Well
MW11 11/28/18 1/18/23 OC: 55 IC: 65 65-70 70 96.80 31.96 0 64.84 Type III vertical delineation well
MW12 4/29/19 1/20/23 25-40 40 94.74 29.57 0 65.17 Type II Groundwater Monitoring Well
MW13 4/29/19 1/18/23 25-40 40 94.30 29.34 0 64.96 Type II Groundwater Monitoring Well
MW14 4/30/19 1/18/23 25-40 40 96.30 31.29 0 65.01 Type II Groundwater Monitoring Well
MW15 9/22/20 1/18/23 25-45 45 97.25 32.00 0.35 65.51 Type II Groundwater Monitoring Well
MW16 9/22/20 1/18/23 25-45 45 97.38 35.55 4.78 65.32 Type II Groundwater Monitoring Well
MW17 9/22/20 1/18/23 20-45 45 98.41 32.67 yes*65.74 Type II Groundwater Monitoring Well
AS1 11/16/21 -55-60 60 98.06 ---1"-diameter air sparge well
SVE1 11/16/21 -20-35 35 98.34 ---2"-diameter SVE well
SVE2 11/16/21 -20-35 35 97.96 ---2"-diameter SVE well
SVE3 11/16/21 -20-35 35 97.99 ---2"-diameter SVE well
Notes:
1. "BGS" = below ground surface
2. "-" information not available
3. The groundwater elevations for monitoring wells with free product was corrected as follows: [Top of Casing Elevation - Depth to Water] + [Free Product Thickness x 0.7305]
4. Note that data from monitoring wells MW9 and MW10 was collected on June 1, 2022 as vehicles were parked over those wells on May 9, 2022.
5. *Meter had trouble reading thickness of free product but its presence was confirmed with a bailer.
25
20
55
20
20
20
30
30
25
25
25
25
30
30
30
30
30
30
MONITORING WELL CONSTRUCTION INFORMATION
Incident Name: Peth Mini Mart Incident No.: 40784
Well Casing Depth (feet
BGS)
30
30
Page 1 of 2
6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B/6256200B6200BWell ID Date Collected
MW1 1/22/18 484 2,500 476 2,890 <4.22 17.5 222 <4.50 <82 <<<<<<<2.22 65.8 <<<<<<<<<75.0 62 <2.35 <32.8
12/3/18 2,400 11,700 1,280 8,550 53.7 31.2 624 < 0.180 <156 < 0.0670 < 56.0 2.47 61.6 2.64 49.2 1.86 < 70.4 10.9 < 0.124 << 0.160 < 0.180 << 0.0600 3.34 < 3.00 124 32.2 <94.4
9/23/20 1,900 7,610 978 5,090 76.8 70 649 <<110 << 25.8 << 54.3 < 8.73 < 55.3 < 8.39 886 <<<< 9.54 << 9.31 << 8.40 28,400 153 66/77.7 <88.8
5/9/22 380 309 78 273 < 0.220 2.68 37 < 0.230 <9.38 < 0.640 < 2.60 < 0.570 < 1.40 < 0.560 < 1.80 < 0.710 < 10.0 < 0.540 < 0.210 << 1.00 < 0.240 < 0.850 0.795 0.917 < 24.0 32.3 < 3.00 <8.23
1/18/23 728 1,170 71.6 1,040 < 2.20 7.22 112 << 1.90 32.1 << 26.0 <<<<<<<< 5.00 < 1.50 < 10.0 < 2.40 <<<< 240 37.4 < 30.0 < 7.60 < 6.90
MW2 6/25/18
10/22/18
vac on MW2 10/22-26/18
10/26/18
12/3/18
4/22/19
vac on MW2 4/22-26/19
4/26/19
4/30/19
vac on MW2 10/7-11/19
9/23/20
vac on MW2 3/22-26/21
5/9/22
1/18/23
vac on MW2 4/10-14/2023
4/10/23
4/14/23
vac on MW2 7/10-14/23
7/10/23
7/14/23
MW3 6/25/18 2,920 7,210 718 3,630 <33.8 <18.4 316 <36.0 <114 <<56.0 <<<<<17.8 258 <<<<<<<<<600 <19.6 <18.8 <<13.0
12/3/18 1,850 5,510 542 2,919 35.9 15.1 283 < 0.180 <92 < 0.0670 < 28.0 < 0.0880 46.8 1.94 42.1 1.87 44.9 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 2.51 < 3.00 29.5 16.3 <59.5
9/23/20 5,560 20,700 2060 11,060 78 64 1,220 <<338 <261 <194 < 17.5 < 111 < 16.8 1,460 <<<< 19.1 << 18.6 << 16.8 < 8,310 85 154/121 <180
5/9/22
1/18/23
vac on MW3 4/10-14/2023
4/10/23
4/14/23
vac on MW3 7/10-14/23
7/10/23
7/14/23
MW4 6/25/18 2,510 8,180 1,460 7,550 <16.9 <9.2 667 <18.0 <222 <646 <<<<< 8.9 423 <<<<<<<<<300 71 <9.4 <122
12/3/18 3,290 19,900 1,920 10,510 18.5 32.6 852 < 0.180 <260 1.67 < 56.0 < 0.0880 79.2 12.1 61.7 3.05 < 70.4 < 0.132 < 0.124 <8.06 < 0.180 << 0.0600 5.99 < 3.00 < 19.6 9.24 <162
9/23/20 1,190 3,880 552 3,139 < 3.95 8.6 407 <<132 <110 << 43.5 22.4 < 44.2 < 6.71 1,060 <<<16.4 << 7.45 << 6.72 < 3,320 51 11/6.32 <77.2
5/9/22 384 479 92.6 441 < 0.440 0.882 55.7 < 0.460 <22.1 < 1.28 29 < 1.14 < 2.80 < 1.12 < 3.60 < 1.42 85.8 < 1.08 < 1.00 <2.69 < 0.480 < 1.70 < 1.52 < 1.40 < 48.0 11 < 6.00 <15.2
1/18/23 1,920 1,620 430 2,330 < 2.20 14.3 217 << 1.90 87.1 <32.6 <<<<<<<< 5.00 < 1.50 < 10.0 < 2.40 <<<< 240 42.1 < 30.0 7.85 47.9
MW5 12/3/18 1,920 403 93 1,170 171 3.42 170 < 0.180 <84.7 < 0.0670 < 0.280 < 0.0880 23.7 < 0.0900 25.3 2.05 72.6 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 3.15 < 3.00 30.8 18.1 <35.3
9/23/20 8,220 8,880 931 4,390 41.8 29.5 503 <<153 << 25.8 <135 < 8.73 119 < 8.39 944 <<<< 9.54 << 9.31 << 8.40 < 4.150 29.8 39.8/32.4 <76.8
5/9/22 5,290 20,800 1,700 10,500 199 39 935 < 23.0 <254 < 64.0 474 < 57.0 < 140 < 56.0 < 180 < 71.0 < 1,000 < 54.0 < 50.0 << 100 < 24.0 < 85.0 < 76.0 < 70.0 < 2,400 68.5 < 300 <113
1/18/23 6,610 28,200 1,810 11,700 250 82.3 642 << 38.0 210 << 520 <<<<<<<< 100 < 30.0 < 200 < 48.0 <<<< 4800 < 106 < 600 < 152 < 138
MW6 12/3/18 1,070 824 205 1,069 6.34 3.5 140 < 0.180 <27.6 < 0.0670 < 0.280 < 0.0880 10.2 < 0.0900 6.74 1.03 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 9.02 52.8 <19.6
9/23/20 2,780 8,340 1,750 9,810 82.2 16.6 1,740 <<532 <178 <163 < 6.98 95 < 6.71 1,170 <<<< 7.63 << 7.45 <9 < 3,320 112 350/199 <278
5/9/22 5,440 5,810 580 2,590 41.6 32.4 285 < 11.5 <121 < 32.0 < 130 < 28.5 < 70.0 < 28.0 < 90.0 < 35.5 < 500 < 27.0 < 25.0 << 50.0 < 12.0 < 42.5 < 38.0 < 35.0 < 1,200 < 26.5 < 150 <37.5
1/18/23 9,050 14,100 1,370 7,170 58.8 72.3 842 << 19.0 341 << 260 <<<<<<<< 50.0 < 15.0 < 100 < 24.0 <<<< 2400 < 53.0 < 300 < 76.0 106
MW7 12/3/18 28.2 42.7 12.3 55.4 < 0.169 < 0.0920 3.35 < 0.180 <3.91 < 0.0670 14.2 < 0.0880 11.5 < 0.0900 11.5 < 0.0890 6.96 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 0.93 < 0.0940 <1.09
9/23/20 297 156 61.2 542.1 < 0.198 0.93 43.2 <<22.1 <38.6 <16.1 < 0.349 56.4 0.37 < 4.53 <<<0.54 << 0.372 <0.83 < 166 11.7 < 0.256/< 0.542 <12.4
5/9/22 1.87 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.230 << 0.560 < 0.640 < 2.60 < 0.570 < 1.40 < 0.560 < 1.80 < 0.710 < 10.0 < 0.540 < 0.500 << 1.00 < 0.240 < 0.850 < 0.760 < 0.700 < 24.0 < 0.530 < 3.00 << 0.690
1/18/23 0.407 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 << 0.190 < 0.560 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
MW8 12/3/18 202 88 45.8 206.3 < 0.169 0.97 24.2 < 0.180 <6.87 < 0.0670 < 0.280 < 0.0880 5.74 < 0.0900 3.79 < 0.0890 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 1.74 < 0.0940 <4.73
9/23/20 407 61.6 73.8 423 5.04 11.2 123 <<61.2 <20.5 <31.3 < 0.698 19.5 < 0.671 90.1 <<<1.46 << 0.745 <0.8 < 332 6.4 418/2.39 <11.9
5/9/22 2 < 0.500 < 0.500 2.02 0.887 1.68 < 0.820 < 0.230 <3.09 < 0.640 < 2.60 < 0.570 < 1.40 < 0.560 < 1.80 < 0.710 < 10.0 < 0.540 < 0.500 << 1.00 < 0.240 < 0.850 < 0.760 < 0.700 < 24.0 < 0.530 < 3.00 << 0.690
1/18/23 44.7 < 0.410 < 0.500 4.26 < 0.220 0.766 < 0.820 << 0.190 0.699 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
MW9 12/3/18 < 0.119 5.84 0.79 3.75 < 0.169 < 0.0920 < 0.103 < 0.180 << 0.0870 < 0.0670 < 0.280 < 0.0880 < 0.320 < 0.0900 < 0.253 < 0.0890 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 < 0.0980 < 0.0940 << 0.0650
9/23/20 < 0.388 < 0.366 < 0.355 < 0.359 < 0.198 < 0.359 0.34 <<< 0.352 << 1.03 << 2.17 < 0.349 < 2.21 < 0.336 < 4.53 <<<< 0.382 <1.77 << 0.336 < 166 < 0.363 < 0.256/< 0.542 << 0.307
6/1/22 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 <<< 0.560 << 2.60 << 1.40 < 0.560 < 1.80 < 0.710 < 10.0 <<<< 1.00 <<<< 0.700 < 24.0 < 0.530 < 3.00 << 0.690
1/18/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 << 0.190 < 0.560 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
MW10 12/3/18 < 0.119 2.46 0.75 3.51 < 0.169 < 0.0920 0.63 < 0.180 << 0.0870 < 0.0670 < 0.280 < 0.0880 < 0.320 < 0.0900 < 0.253 < 0.0890 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 < 0.0980 < 0.0940 << 0.0650
9/23/20 35.4 0.38 9.65 69 < 0.198 < 0.359 8.76 <<2.52 << 1.03 << 2.17 < 0.349 9.92 < 0.336 < 4.53 <<<0.78 <0.86 << 0.336 < 166 3.96 < 0.256/< 0.542 <1.55
6/1/22 17.1 < 0.410 1.73 23.1 < 0.220 0.419 2.7 <<0.561 << 2.60 << 1.40 < 0.560 < 1.80 < 0.710 < 10.0 <<<< 1.00 <<<< 0.700 < 24.0 2.02 < 3.00 << 0.690
1/18/23 1.34 < 0.410 < 0.500 1.7 < 0.220 < 0.200 < 0.820 << 0.190 < 0.560 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
NO PRODUCT
MMPE EVENT
Free Product (0.33')
NO PRODUCT
Free Product (0.69')
Free Product (0.28')
Free Product (0.3')
MMPE EVENT
Free Product (0.9')
Free Product (4.43')
MMPE EVENT
MMPE EVENT
Free Product (1.43')
Free Product (2.97')
Analytical Method
Incident Name: Perth Mini Mart Incident No.: 40784
Table 5 HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS
Contaminant of Concern
DichlorofluoromethaneMTBEIPEBenzeneTolueneEthylbenzeneTotal Xylenes1,3,5-Trimethylbenzene1,4-Dichlorobenzene2-Butanone (MEK)2-Chlorotoluene2-HexanoneNaphthalenen-Butylbenzenen-PropylbenzeneEthanol4-Chlorotoluene4-Methyl-2-pentanone (MIBK)4-IsopropyltolueneAcetoneBromobenzeneBromodichloromethaneDibromochloromethanen-ButylbenzeneSec-ButylbenzeneChlorobenzeneChloroformFree Product (4.11')
MMPE EVENT
Free Product (0.05')
Free Product (0.18')
Free Product (4.12')
MMPE EVENT
Free Product (3.69')
NO PRODUCT
MMPE EVENT 1,2,4-Trimethylbenzene1,2-Dibromoethane (EDB)1,2-DichloroethaneIsopropylbenzeneFree Product (6.25')
Free Product (7.05')
MMPE EVENT
NO PRODUCT
Free Product (5.63')
Page 2 of 2
6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B6200B/6256200B6200BWell ID Date Collected
Analytical Method
Incident Name: Perth Mini Mart Incident No.: 40784
Table 5 HISTORICAL SUMMARY OF GROUNDWATER SAMPLING RESULTS
Contaminant of Concern
DichlorofluoromethaneMTBEIPEBenzeneTolueneEthylbenzeneTotal Xylenes1,3,5-Trimethylbenzene1,4-Dichlorobenzene2-Butanone (MEK)2-Chlorotoluene2-HexanoneNaphthalenen-Butylbenzenen-PropylbenzeneEthanol4-Chlorotoluene4-Methyl-2-pentanone (MIBK)4-IsopropyltolueneAcetoneBromobenzeneBromodichloromethaneDibromochloromethanen-ButylbenzeneSec-ButylbenzeneChlorobenzeneChloroform1,2,4-Trimethylbenzene1,2-Dibromoethane (EDB)1,2-DichloroethaneIsopropylbenzeneMW11 12/3/18 1.73 3.22 0.61 3.19 < 0.169 < 0.0920 0.54 < 0.180 << 0.0870 < 0.0670 7.4 < 0.0880 < 0.320 < 0.0900 < 0.253 < 0.0890 27.8 < 0.132 3.02 <13.4 1.27 << 0.0600 < 0.0920 < 3.00 < 0.0980 < 0.0940 << 0.0650
9/23/20 10.9 < 0.366 < 0.355 28.89 < 0.198 < 0.359 3.88 <<< 0.352 << 1.03 << 2.17 < 0.349 < 2.21 < 0.336 < 4.53 <<<< 0.382 << 0.372 << 0.336 < 166 2.74 0.29/< 0.542 << 0.307
5/9/22 80.8 0.862 < 0.500 15.7 < 0.220 1.15 5.07 < 0.230 <1.01 < 0.640 < 2.60 < 0.570 < 1.40 < 0.560 < 1.80 < 0.710 < 10.0 < 0.540 < 0.500 << 1.00 < 0.240 < 0.850 < 0.760 < 0.700 < 24.0 4.51 < 3.00 << 0.690
1/18/23 251 < 0.820 < 1.00 19.4 0.818 2.39 5.34 << 0.380 < 1.12 << 5.20 <<<<<<<< 1.00 0.402 < 2.00 < 0.480 <<<< 48.0 10 < 6.00 < 1.52 < 1.38
MW12 4/30/19 < 0.119 < 0.0570 < 0.0920 < 0.122 3.48 < 0.0920 < 0.103 < 0.180 << 0.0870 < 0.0670 < 0.280 < 0.0880 < 0.320 < 0.0900 < 0.253 < 0.0890 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 < 0.0980 < 0.0940 << 0.0650
9/23/20 63.1 < 0.366 7.19 14.3 6.48 0.36 3.28 <<< 0.352 << 1.03 << 2.17 < 0.349 < 2.21 < 0.336 < 4.53 <<<< 0.382 << 0.372 << 0.336 < 166 0.37 0.27/ < 0.542 <0.61
5/9/22 369 1.54 < 0.500 71.9 6.03 1.1 12.7 < 0.230 << 0.560 < 0.640 < 2.60 < 0.570 < 1.40 < 0.560 < 1.80 < 0.710 < 10.0 < 0.540 < 0.500 << 1.00 < 0.240 < 0.850 < 0.760 < 0.700 < 24.0 1.52 < 3.00 <2.59
1/20/23 313 < 2.05 6.8 29.2 4.37 1.43 5.85 << 0.950 < 2.80 << 13.0 <<<<<<<< 2.50 < 0.750 < 5.00 < 1.20 <<<< 120 < 2.65 < 15.0 < 3.80 < 3.45
MW13 4/30/19 273 1.67 3.31 173.8 7.12 10.8 34.2 < 0.180 <2.42 < 0.0670 < 0.280 < 0.0880 < 0.320 < 0.0900 < 0.253 0.53 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 <1.9 0.65 < 3.00 11.3 6.57 <2.06
9/23/20 1.49 < 0.366 < 0.355 2.58 < 0.198 < 0.359 0.69 <<< 0.352 << 1.03 << 2.17 < 0.349 < 2.21 < 0.336 < 4.53 <<<< 0.382 << 0.372 << 0.336 < 166 < 0.363 < 0.256/< 0.542 << 0.307
5/9/22 427 8.67 11.3 247 9.72 4.28 31.9 < 0.460 <10.1 < 1.28 < 5.20 < 1.14 < 2.80 < 1.12 < 3.60 < 1.42 < 20.0 < 1.08 < 1.00 << 2.00 < 0.480 < 1.70 < 1.52 < 1.40 < 48.0 18 14.4 <61.1
1/18/23 504 5.29 5.17 151 9.01 5.94 18.8 << 0.950 11 << 13.0 <<<<<<<< 2.50 < 0.750 < 5.00 < 1.20 <<<< 120 22.8 < 15.0 < 3.80 < 3.45
MW14 4/30/19 < 0.119 < 0.0570 < 0.0920 < 0.122 < 0.169 < 0.0920 < 0.103 < 0.180 << 0.0870 < 0.0670 < 0.280 < 0.0880 < 0.320 < 0.0900 < 0.253 < 0.0890 < 0.352 < 0.132 < 0.124 << 0.160 < 0.180 << 0.0600 < 0.0920 < 3.00 < 0.0980 < 0.0940 << 0.0650
9/23/20 < 0.388 < 0.366 < 0.355 < 0.359 < 0.198 < 0.359 < 0.335 <<< 0.352 << 1.03 << 2.17 < 0.349 < 2.21 < 0.336 < 4.53 <<<< 0.382 << 0.372 << 0.336 < 166 < 0.363 < 0.256/< 0.542 << 0.307
5/9/22 0.794 0.414 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 < 0.230 << 0.560 < 0.640 < 2.60 < 0.570 < 1.40 < 0.560 < 1.80 < 0.710 < 10.0 < 0.540 < 0.500 << 1.00 < 0.240 < 0.850 < 0.760 < 0.700 < 24.0 < 0.530 < 3.00 << 0.690
1/18/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 <0.313 < 0.560 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
MW15 9/23/20 5,870 51,300 5,850 33,400 106 120 3,980 <<872 << 206 << 435 < 76.3 < 442 < 6.71 2,390 <<<< 76.3 << 74.5 << 67.2 < 33,200 598 490/335 <574
5/9/22 4,180 44,000 2,470 14,800 91.7 108 1,000 < 23.0 <227 < 64.0 288 < 57.0 < 140 < 56.0 < 180 < 71.0 < 1,000 < 54.0 < 50.0 << 100 < 24.0 < 85.0 < 76.0 < 70.0 23,200 145 < 300 <119
1/18/23
vac on MW15 4/10-14/2023
4/10/23
4/14/23
vac on MW15 7/10-14/23
7/10/23
7/14/23
MW16 9/23/20
vac on MW16 3/22-26/21
5/9/22
1/18/23
vac on MW16 4/10-14/2023
4/10/23
4/14/23
vac on MW16 7/10-14/23
7/10/23
7/14/23
MW17 9/23/20 5,540 41,700 4,190 24,380 504 300 2,770 <597 <1,000 << 109 < 17.5 < 111 < 16.8 1,860 <<<< 19.1 << 18.6 << 16.8 34,200 469 357/246 377
vac on MW17 3/22-26/21
5/9/22 6,920 49,400 3,480 20,900 352 216 1,360 < 46.0 312 < 128 761 < 114 < 280 < 112 < 360 < 142 < 2,000 < 108 < 100 << 200 < 48.0 < 170 < 152 < 140 80,300 220 < 600 175
1/18/23 Free product gauged in well - meter would not produce accurate reading
vac on MW17 4/10-14/2023
4/10/23
4/14/23
vac on MW17 7/10-14/23
7/10/23
7/14/23
MW18 3/29/23 13.2 < 0.410 < 0.500 < 1.60 2.38 0.212 J <<<<<<<<<<<<<<<<<<<<<<<<<
MW19 3/29/23 90.3 0.414 J < 0.500 12 4.91 3.68 1.7 <<<<<<<<<<<<<<<<<<<<1.37 <<<
MW21 5/2/23 22.5 < 0.900 < 0.500 2.71 J 1.86 0.998 J <<<<<<<<<<< 0.710 <<<<<<<<< 0.700 <<< 0.300 < 0.760 < 0.690
MW22 5/2/23 < 0.500 < 0.900 < 0.500 < 1.60 0.747 J < 0.200 <<<<<<<<<<< 0.710 <<<<<<<<< 0.700 <<< 0.300 < 0.760 < 0.690
MW20 3/29/23 179 4.12 23.8 220 3.65 7.99 24.6 <<4.95 <<<<<<0.82 J 30 <<<1.41 <<<1.23 <34.7 28.9 1.67 6.6
WSW1 1/18/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 << 0.190 < 0.560 << 2.60 <<<<<<<3.47 < 0.150 14.4 0.438 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
3/21/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 <<< 0.560 <<<<<<<<<4.15 <22.2 0.442 <<<<<<<<
7/10/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<5.79 <46.3 0.697 <<<<<<<<
WSW2 1/18/23 < 0.130 < 0.410 < 0.500 < 1.60 0.231 < 0.200 < 0.820 << 0.190 < 0.560 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
3/29/23 0.271 J < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<
7/10/23 < 0.500 < 0.900 < 0.500 < 1.60 0.234 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<
WSW4 1/18/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 << 0.190 < 0.560 << 2.60 <<<<<<<< 0.500 < 0.150 < 1.00 < 0.240 <<<< 24.0 < 0.530 < 3.00 < 0.760 < 0.690
3/21/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 <<< 0.560 <<<<<<<<<< 0.500 << 1.00 < 0.240 <<<<<<<<
7/10/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<
WSW5 3/21/23 < 0.130 < 0.410 < 0.500 < 1.60 < 0.220 < 0.200 < 0.820 <<< 0.560 <<<<<<<<<< 0.500 << 1.00 < 0.240 <<<<<<<<
7/12/23 < 0.500 < 0.900 < 0.500 < 1.60 < 0.220 < 0.200 <<<<<<<<<<<<<<<<<<<<<<<<<
1 600 600 500 20 70 400 0.02 0.4 400 6 4,000 100 40 24 100 25 6,000 NE 0.6 50 70 0.4 1,000 70 70 4,000 70 6 70 70
5,000 260,000 84,500 85,500 20,000 70,000 28,500 50 400 25,000 6,000 4,000,000 NE 40,000 7,500 100,000 11,700 6,000,000 NE NE 50,000 70,000 400 140,000 6,900 8,500 4,000,000 25,000 6,000 6,900 30,000
Notes:
1. All results in µg/L.
2. Bold denotes a compound detection
3. Shading denotes a 2L Standard violation
4. < - denotes less than sample detection limit
5. Italics indicates a GCL violation
6. NE - Not Established
7. "-" - indicates sample not tested per that method
Free Product (0.08')
MMPE EVENT
Free Product (0.07')
NO PRODUCT
Free Product (3.28')
MMPE EVENT
Free Product (2.44')
MMPE EVENT
Free Product (0.04')
NO PRODUCT
MMPE EVENT
Free Product (0.08')
Free Product (4.78')
MMPE EVENT
MMPE EVENT
Free Product (0.09')
Free Product (0.07')
MMPE EVENT
Free Product (0.05')
Free Product (0.35')
GCL
2L Standard
Free Product (0.52')
Free Product (0.05')
NO PRODUCT
MMPE EVENT
RUN v LP R λ L W T CSOURCE Z NAPL NOTES
EXISTING SITUATION - NO TREATMENT
001 16 180 1 0.35 595 100 50 150 50 28,415
002 30 180 1 0.35 595 100 50 150 50 28,415 Too fast downgradient migration.
003 .5 180 1 0.35 595 100 50 150 50 28,415 Hardly any source decay or downgradient travel.
004 16 180 2 0.35 595 100 50 150 50 28,415 Insufficient downgradient travel.
005 16 180 0.1 0.35 595 100 50 150 50 28,415 Too much downgradient travel.
006 16 180 1 1.5 595 100 50 150 50 28,415 Insufficient downgradient travel.
007 16 180 1 0.05 595 100 50 150 50 28,415 Too much downgradient travel without degradation.
008 16 180 1 0.35 595 100 50 1000 50 28,415 Too much downgradient.
009 16 180 1 0.35 595 100 50 1 50 28,415 Too little downgradient.
010 16 180 1 0.35 595 100 50 150 50 200,000 No source degradation.
011 16 180 1 0.35 595 100 50 150 50 10 Source gone too fast.
012 15 180 1 0.35 595 100 100 150 50 28,415 Run simulation -001 to 100 years to observe outcome with seepage velocity increased to 15 ft/yr to slightly slow down advancement. Appears reasonable.
012 15 180 1 0.35 595 100 10 150 50 28,415 0.007 mg/L at 357 feet downgradient. Source area = 148.126 mg/L
012 15 180 1 0.35 595 100 20 150 50 28,415 0.001 mg/L at 536 feet downgradient. Water supply well threatened. Source area = 146.276 mg/L
012 15 180 1 0.35 595 100 30 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 144.448 mg/L
012 15 180 1 0.35 595 100 40 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 142.644 mg/L
012 15 180 1 0.35 595 100 50 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 140.862 mg/L
012 15 180 1 0.35 595 100 60 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 139.102 mg/L
012 15 180 1 0.35 595 100 70 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 137.364 mg/L
012 15 180 1 0.35 595 100 80 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 135.648 mg/L
012 15 180 1 0.35 595 100 90 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 133.953 mg/L
012 15 180 1 0.35 595 100 100 150 50 28,415 0.001 mg/L at 595 feet downgradient. Water supply well impacted. Source area = 132.280 mg/L
The subject release incident has had free-phase petroleum product at thicknesses as great as seven (7) feet. That thickness has been reduced via
MMPE events to around five (5) feet and is present in multiple wells downgradient of the UST system. The depth to water is thirty (30) feet below
ground level, indicating that there is a large amount of contaminated soil above it to provide that much product. Excavation was halted by the
NCDWM-UST so that contaminant mass largely remains in place. The release incident was detected by the UST system's ATG system in 2017.
With the passing of five years and the data obtained from product gauging and monitoring well sampling, some basic migration trending is
possible. The large amount of product provides an ongoing secondary source that will feed migration for a very long time. The characteristics
discerned from soil lithology study during well installation and aquifer slug testing analysis provide good inputs to run this model. As shown in the
model results above, groundwater contamination will arrive at downgradient water supply wells and continue to contaminate them for a long
time without further treatment.
FOLLOWING TREATMENT THAT REMOVES FREE PRODUCT, GCL VIOLATIONS, AND THE MAJORITY OF STG MSCC SOIL VIOLATIONS:
013 15 180 1 0.35 595 100 50 10 50 500 Plume advances to 417 feet downgradient but never reaches the sensitive receptor (well) at 595 feet. In year 30 contamination begins to recede.
014 15 180 1 0.35 595 100 50 5 50 500
Benzene is the lone GCL violation in the dissolved-phase plume at this site. It also has the strictest (lowest) GCL value. Having previously
determined that the release incident is from gasoline, a VOC, and not from an SVOC, it is reasonable to model benzene as a representing
compound of what will migrate toward the sensitive receptor. Run 014 was conducted using a 5 mg/L concentration as the C source as that is the
benzene GCL. Once treatment at this site removes all GCL violations, it does not appear likely that the downgradient water supply well will
become impacted.
014 15 180 1 0.35 595 100 5 5 50 500 0.011 mg/L at 179 feet downgradient. Source area = 4.961 mg/L
014 15 180 1 0.35 595 100 10 5 50 500 0.002 mg/L at 298 feet downgradient. Plume advancing. Source decaying. Source area = 4.923 mg/L
014 15 180 1 0.35 595 100 15 5 50 500 0.001 mg/L at 595 feet downgradient. Plume advancing. Source decaying. Source area = 4.884 mg/L
014 15 180 1 0.35 595 100 20 5 50 500 0.001 mg/L at 595 feet downgradient. Plume advancing. Source decaying. Source area = 4.874 mg/L
014 15 180 1 0.35 595 100 25 5 50 500 0.001 mg/L at 348 feet downgradient. No further plume advancement. Plume receeding at 179 feet downgradient. Source area = 4.809 mg/L
014 15 180 1 0.35 595 100 30 5 50 500 0.001 mg/L at 348 feet downgradient. No further plume advancement. Plume receeding at 238 feet downgradient. Source area = 4.772 mg/L
014 15 180 1 0.35 595 100 35 5 50 500 0.001 mg/L at 348 feet downgradient. No further plume advancement. Plume receeding at 357 feet downgradient. Source area = 4.735 mg/L
014 15 180 1 0.35 595 100 40 5 50 500 0.001 mg/L at 348 feet downgradient. No further plume advancement. Plume receeding. Source area = 4.698 mg/L
014 15 180 1 0.35 595 100 45 5 50 500 0.001 mg/L at 348 feet downgradient. No further plume advancement. Plume receeding. Source area = 4.661 mg/L
014 15 180 1 0.35 595 100 50 5 50 500 0.001 mg/L at 348 feet downgradient. No further plume advancement. Plume receeding. Source area = 4.625 mg/L
v Seepage velocity (ft/yr)W Modeled area width (ft)
LP Length of plume (ft)T Simulation time (yr)
R Retardation factor (dimensionless)CSOURCE Source zone concentration (mg/l)
λ First-order decay coefficient (1/yr)Z Source zone thickness (ft)
L Modeled area length (ft)NAPL Soluble mass in NAPL , soil (kg)
Shading denotes deviations from baseline inputs
Once treatment at this site removes all GCL violations, it does not appear likely that the downgradient water
supply well will become impacted.
NOTES
TABLE 6 - BIOSCREEN MODELING INPUTS AND NOTES
Terraquest Environmental Consultants, P.C. - Incident Name: Perth Mini Mart Incident No. 40784
BASELINE ANALYSIS
SENSITIVITY ANALYSIS
PROJECTIONS
PROJECTIONS
Appears within reason (maybe slightly too fast). Contamination is present in 100' downgradient wells MW12&13 at 465 and 743ug/L…another 100 feet to have 26 ug/L at year 5 seems reasonable.
Used 2' product thickness across suspected area as an estimate. Product as thick as 4' measured but not continuously.
Contaminant migration is largely controlled by contaminant mass and seepage velocity. The below model conditions were evaluated to determine if impact to sensitive receptors would still occur if product and GCL
violations are removed. Modeling at Run 013 was conducted using a summed contaminant number. Individual contaminant compounds are evaluated below.
Table 7
Date: 8/14/23 Facility ID: 0-0024524
Total remedial costs to closure GRAND TOTAL =496,909.75$
Task Description Unit Rate Subtotal Comments
3.101 Drilling supervision 605 feet x 12.50$ =7,562.50$
3.112 1-inch well cost 360 feet x 40.00$ =14,400.00$ 6, 60' sparge wells
3.113 2-inch well cost 245 feet x 50.00$ =12,250.00$ 7, 35' SVE wells
3.118 Drilling supervision increase 605 feet x 5.00$ =3,025.00$
3.351 Well casing surveying 13 wells x 80.00$ =1,040.00$
3.397 MOBE increase 2 increases x 100.00$ =200.00$
3.398 Drill rig MOBE 2 MOBE x 350.00$ =700.00$
3.500 Drill crew per diem- Driller 1 8 days x 155.00$ =1,240.00$
3.500 Drill crew per diem- Driller 2 8 days x 155.00$ =1,240.00$
6.190 Letter report 1 letter x 500.00$ =500.00$
12.030 Drill supervision per diem 8 days x 155.00$ =1,240.00$
12.050 Consultant MOBE 2 MOBE x 250.00$ =500.00$
12.055 MOBE increase 2 increases x 50.00$ =100.00$
TOTAL =43,997.50$
7.065 SVE and air sparge system cost 1 cost x 121,967.25$ =121,967.25$
7.081 System installation supervision 32 hours x 93.00$ =2,976.00$ 3-week install: 8M,4F,4M,4F,4M,8F.
7.100 System installation cost 1 cost x 52,095.00$ =52,095.00$
12.050 Consultant MOBE 6 MOBE x 250.00$ =1,500.00$ 3-week install: Monday and Friday visits.
12.055 MOBE increse 6 increases x 50.00$ =300.00$
TOTAL =178,838.25$
4.031 Well sampling 22 wells x 110.00$ =2,420.00$ MW1-17. Product gauged at $50/well if present.
4.090 Cost for analytical 22 samples x 66.00$ =1,452.00$ 6200B
4.091 Sample shipping 1 fee x 85.00$ =85.00$
6.106 CAPR 1 report x 1,125.00$ =1,125.00$
12.050 Consultant MOBE 1 MOBE x 250.00$ =250.00$
12.055 MOBE increase 1 increase x 50.00$ 50.00$
per event =5,382.00$
Quarterly 1st year cost 21,528.00$
4 years of semi-annual 43,056.00$
TOTAL =64,584.00$
4.090 Lab cost 3 samples x 151.00$ =453.00$ EPA 18
4.091 Shipping cost 3 fees x 85.00$ =255.00$
6.106 CAPR 1 report x 1,125.00$ =1,125.00$
7.201 System O&M 24 hours x 93.00$ =2,232.00$ Monthly visits of 2 x 4 hrs for the quarter.
7.250 System parts 1 lump x 750.00$ =750.00$
7.260 Operating utilities 3 months x 2,000.00$ =6,000.00$ Estimated
12.050 Consultant MOBE 6 MOBE x 250.00$ =1,500.00$ O&M visits.
12.055 MOBE increase 6 MOBE increase x 50.00$ =300.00$ O&M visits.
quarterly =12,615.00$
yearly =50,460.00$
4 years =201,840.00$
3.398 Drill rig MOBE 1 MOBE x 350.00$ =350.00$
3.399 Well abandonment 1050 feet x 6.00$ =6,300.00$
6.082 Public notification 1 notice x 500.00$ =500.00$
6.174 NORP 1 NORP x 500.00$ =500.00$
TOTAL =7,650.00$
Units
Incident Name: Peth Mini Mart Incident No.: 40784
CORRECTIVE ACTION PLAN COSTS

FIGURES

ONSULTANTS, P.C.CENVIRONMENTAL
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.

APPENDIX A

North Carolina Department of Environmental Quality | Division of Waste Management
Mooresville Regional Office | 610 East Center Avenue | Suite 301 | Mooresville, NC
28115 | [phone]

June 1, 2023
Madhukunh, LLC 135 Corona Circle Mooresville, North Carolina 28117 Attention: Ruchit Shah Re: Notice of Regulatory Requirements
15A NCAC 02L .0407 < Select CAP Rule by Risk >
Risk-based Assessment and Corrective Action
for Petroleum Underground Storage Tanks Perth Mini Mart
818 Perth Road, Troutman
Iredell County
Incident Number: 40784
Risk Classification: High
Ranking: H392D

Dear Mr. Shah: The Corrective Action Design received on October 31, 2022 has been reviewed by the UST Section,
Division of Waste Management, Mooresville Regional Office. The Corrective Action Design has been
reviewed and approved by the UST Section. Please proceed with the Record of Decision. The ROD must
be received by this office within 45 days of the date of this letter. The CAD states that the system is
expected to be operational within 14 months of CAD approval. Therefore, the system must be installed and
operational no later than August 31, 2024.
The review indicates that corrective action is necessary to remediate environmental contamination. Title
15A NCAC 02L .0407 (c) [High Risk] requires you to comply with the assessment and cleanup
requirements of Title 15A NCAC 2N .0707 and Title 15A NCAC 02L .0106(c) and 02L .0111(c).
In accordance with 15A NCAC 02L .0111(a), a Corrective Action Plan shall be submitted to this office in
accordance with a schedule established by the Division of Waste Management Director. Because this
incident is eligible (or potentially eligible) for access to the Commercial Leaking Petroleum
Underground Storage Tank Cleanup Fund (State Trust Fund), a Record of Decision in accordance
with the most recent version of the UST Section Corrective Action Guidelines, and the applicable State
Trust Fund Reasonable Rate Document must be submitted. The Section must approve the Corrective
Action Design prior to finalizing the Record of Decision.
Because a release or discharge has been confirmed, a Licensed Geologist or a Professional Engineer,
certified by the State of North Carolina, is required to prepare and certify all reports submitted to the
Department in accordance with 15A NCAC 02L .0103(e) and 02L .0111(e).
Page 2 of 2 40784 June 1, 2023

North Carolina Department of Environmental Quality | Division of Waste Management
< Right Click, Select 'Edit Footer', then Click to Select Applicable Regional Office >

The Department of Environmental Quality requires that all work not determined to be an emergency
response or associated with risk assessment (i.e., the Limited Site Assessment Report, per Title 15A NCAC
2L .0405) must be preapproved if State Trust Fund reimbursement is anticipated. To comply with this
requirement, a completed Preapproval/Claim Authorization Form, encompassing the required Record of
Decision task, must be received in this office within 14 days of the date of this letter. Upon completion of
the preapproved activities, you should submit your claim promptly. Reimbursement funds are budgeted
based on completed preapprovals. Delays in reimbursement or even denial due to exceeding the statute of
limitations on claiming eligible costs can result where claims are not submitted immediately following work
completion.
If you have any questions regarding trust fund eligibility or reimbursement from the Commercial Leaking
Petroleum Underground Storage Tank Cleanup Fund, please contact the UST Section Trust Fund Branch
at [phone]. If you have any questions regarding the actions that must be taken or the rules mentioned
in this letter, please contact me at the address or telephone number listed below.

Sincerely,

Brad C. Newton, P.G. Hydrogeologist
Mooresville Regional Office
UST Section, Division of Waste Management, NCDEQ
cc: Iredell County Health Department
Ryan Kerins - Terraquest

July 11, 2023 Madhukunj, LLC 135 Corona Circle Mooresville, North Carolina 28117
Attention: Ruchit Shah Re: Perth Mini Mart 818 Perth Road, Troutman
Iredell County Incident number: 40784 Risk Classification: High
Dear Mr. Shah: Your request for additional time for submitting the Record of Decision at the above referenced site has been reviewed by the Underground Storage Tank Section of the Division of Waste Management (the Division), Mooresville Regional Office.  Based on the information your consultant has provided with the request for an extension, the request is
hereby granted until September 1, 2023.  Failure to submit the ROD by the extended due date may result in a recommendation for the assessment of civil penalties beginning from the original due date.      If you have any questions regarding the actions that must be taken, or the rules mentioned in this letter, please contact me at the address or telephone number listed below for the Mooresville Regional Office.  Sincerely,

Brad C. Newton, P.G. Hydrogeologist Mooresville Regional Office
UST Section, Division of Waste Management, NCDEQ cc: Ryan Kerins - Terraquest (via e-mail) Iredell County Health Department

APPENDIX B

Well ID
Top of
Casing
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
MW1 98.78 38.60 0 60.18 36.43 0 62.35 35.74 0 63.04 34.59 0 64.19 31.50 0 67.28 31.25 0 67.53
MW2 97.83 ---40.45 6.25 61.95 40.38 7.05 62.60 38.26 5.63 63.68 34.00 4.11 66.83 30.90 0.18 67.06
MW3 98.54 ---36.28 0 62.26 35.59 0 62.95 34.62 0 63.92 31.47 0 67.07 31.30 0 67.24
MW4 99.68 ---37.02 0 62.66 36.3 0 63.38 35.11 0 64.57 ---31.77 0 67.91
MW5 96.31 ---------32.95 0 63.36 ---29.70 0 66.61
MW6 97.53 ---------34.23 0 63.30 ---29.89 0 67.64
MW7 99.37 ---------35.00 0 64.37 ---31.52 0 67.85
MW8 98.72 ---------35.19 0 63.53 ---31.79 0 66.93
MW9 89.72 ---------25.64 0 64.08 ---22.42 0 67.30
MW10 90.75 ---------26.95 0 63.80 ---23.80 0 66.95
MW11 96.80 ---------33.22 0 63.58 ---29.95 0 66.85
MW12 94.74 ---------------25.37 0 69.37
MW13 94.30 ---------------22.95 0 71.35
MW14 96.30 ---------------29.89 0 66.41
Average shallow DTW:38.60 36.58 35.88 32.70 31.49 28.47
Well ID
Top of
Casing
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
MW1 98.78 ---30.20 -68.58 ---------32.13 0 66.65
MW2 97.83 32.8 2.85 67.11 32.70 4.12 68.14 30.12 3.08 69.96 28.80 0 69.03 27.45 0 70.38 34.82 4.2 66.08
MW3 98.54 ---29.73 -68.81 ------------
MW4 99.68 ---30.50 -69.18 ------------
MW5 96.31 ---28.08 -68.23 ------------
MW6 97.53 ---29.05 -68.48 ------------
MW7 99.37 ---29.93 -69.44 ------------
MW8 98.72 ---29.82 -68.9 ------------
MW9 89.72 ---21.45 -68.27 ------------
MW10 90.75 ---22.76 -67.99 ------------
MW11 96.80 ---28.96 -67.84 ------------
MW12 94.74 ---26.73 -68.01 ------------
MW13 94.30 ---26.57 -67.73 ------------
MW14 96.30 ---27.84 -68.46 ------------
MW15 97.25 ---29.07 -68.18 27.3 0 69.95 27.59 0 69.66 27.00 0 70.25 34.05 3 65.39
MW16 97.38 ---29.15 0.05 68.26 29.58 2.85 69.881925 27.74 0 69.64 28.22 1.49 70.248445 34.82 4.82 66.08
MW17 98.41 ---30.05 -68.36 29.25 0.12 69.24766 28.59 0.1 69.89305 27.92 0.05 70.526525 32.05 0.05 66.40
AS1 98.06 ---------------31.72 0 66.34
Average shallow DTW:27.98 29.06 28.18 27.65 33.27
Well ID
Top of
Casing
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
MW1 98.78 32.35 0 66.43 32.76 0 66.02 ------------
MW2 97.83 34.63 3.69 65.90 35.63 4.43 65.44 ---34.47 2.97 65.53 32.91 1.43 65.96 32.22 0.69 66.11
MW3 98.54 32.45 0.28 66.29 33.10 0.3 65.66 ---32.90 0.9 66.30 31.86 0 66.68 32.27 0.33 66.51
MW4 99.68 32.76 0 66.92 33.13 0 66.55 ------------
MW5 96.31 30.55 0 65.76 31.25 0 65.06 ------------
MW6 97.53 31.64 0 65.89 32.44 0 65.09 ------------
MW7 99.37 32.39 0 66.98 33.05 0 66.32 ------------
MW8 98.72 32.44 0 66.28 33.27 0 65.45 ------------
MW9 89.72 23.85 0 65.87 23.96 0 65.76 ------------
MW10 90.75 25.17 0 65.58 25.3 0 65.45 ------------
MW11 96.80 29.15 0 67.65 31.96 0 64.84 ------------
MW12 94.74 29.24 0 65.50 29.57 0 65.17 ------------
MW13 94.30 28.85 0 65.45 29.34 0 64.96 ------------
MW14 96.30 30.40 0 65.90 31.29 0 65.01 ------------
MW15 97.25 31.30 0 65.95 32 0.35 65.505675 ---31 0.09 66.32 31.15 0.07 66.15 31.20 0.05 66.09
MW16 97.38 31.14 0.8 66.82 35.55 4.78 65.32179 ---34.28 3.28 65.50 31.59 0.52 66.17 33.23 2.44 65.93
MW17 98.41 32.25 0 66.16 32.67 0 65.74 ---31.9 0.04 66.54 32.01 0.077 66.46 32.17 0.07 66.29
MW18 93.78 ------28.75 0 65.03 ---------
MW19 92.63 ------27.6 0 65.03 ---------
MW20 92.68 ------27.1 0 65.58 ---------
SVE1 98.34 32.07 0.00 66.27 ---------------
Average shallow DTW:30.79 31.52 27.82 32.91 31.90 32.22
Well ID
Top of
Casing
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
Depth to
Water
from Top
of Casing
(feet)
Free
Product
Thickness
(feet)
Groundwater
Elevation
(feet)
MW1 98.78 ---
MW2 97.83 32.27 0 65.56
MW3 98.54 32.44 0 66.10
MW4 99.68 ---
MW5 96.31 ---
MW6 97.53 ---
MW7 99.37 ---
MW8 98.72 ---
MW9 89.72 ---
MW10 90.75 ---
MW11 96.80 ---
MW12 94.74 ---
MW13 94.30 ---
MW14 96.30 ---
MW15 97.25 31.80 0 65.45
MW16 97.38 32.00 0 65.38
MW17 98.41 32.35 0 66.06
MW18 93.78 ---
MW19 92.63 ---
MW20 92.68 ---
SVE1 98.34 ---
Average shallow DTW:32.17
Notes:
1. "BGS" = below ground surface
5/9/2022 1/18/2023 3/29/2023 4/10/23 BEFORE MMPE 4/14/23 AFTER MMPE 7/10/23 BEFORE MMPE
9/23/2021
4/30/2019
HISTORICAL GROUNDWATER ELEVATION DATA
Incident Name: Peth Mini Mart Incident No.: 40784
1/22/2018 6/25/2018 12/3/201810/22/2018 4/22/2019
7/24/2019 9/23/2020 3/22/2021 3/26/2021 4/21/2021
7/14/23 AFTER MMPE

APPENDIX C

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
i Troutman, Iredell County, North Carolina
BID SPECIFICATION
SOIL AND GROUNDWATER REMEDIATION SYSTEM - EQUIPMENT
PERTH MINI MART
7/6/22

Certification:

I, Michael J. Brown, a Licensed Geologist and I, John S. Haselow, a Licensed Engineer in the State
of North Carolina for TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. do certify that the
information contained in this report is correct and accurate to the best of my knowledge. All
work was performed under my direct supervision. My seal and signature are affixed below.
Additional seals and/or signatures are also listed.

Terraquest Environmental Consultants, P.C. is licensed to practice geology and engineering in
North Carolina. The geology certification number of the corporation is C-291. The engineering
certification number of the corporation is C-4634. Engineering is practiced out of the Cary, NC
office.

TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C.

Ryan D. Kerins Michael J. Brown, P.G. John Haselow, PhD, PE
Project Manager President Senior Engineer

I. INSTRUCTIONS TO BIDDERS

This bid package is for equipment, system assembly, delivery and startup assistance for a soil and
groundwater remediation system to treat petroleum contamination at the Perth Mini Mart
property located in Troutman, Iredell County, North Carolina. The site’s location is shown in the
attached Figure 1 and the site vicinity is depicted in Figure 2. Figure 3 displays a general site
layout. This bid document contains General Conditions, a Bid Form, Detail Specifications, and
Figures. Terraquest has prepared this document on behalf of Madhukunj, LLC.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
ii Troutman, Iredell County, North Carolina
Preparation of Bids

Bids shall be submitted on the Bid Form provided in Section III of this package and the bidder
must also provide a rough breakdown of costs on the enclosed Cost Breakdown table which is a
requirement of the NC Leaking UST Trust Fund. This cost breakdown is only meant to provide
justification for the lump sum price and will not be used for final payment. Final payment will be
based upon the bidder’s invoiced amounts up to the bid price unless amount modifications have
been made and approved by Terraquest. The bid may be rejected if it shows any kind of omission,
alteration of form, conditional bid or irregularities of any kind.

Bidders should immediately voice concern over mistakes, omissions, or inconsistencies in the bid
package or about items requiring clarification. If the bidder finds the specifications to be at
variance with any applicable law, ordinance, code, rule or regulation, those should also be
addressed promptly. Written addenda to clarify, correct, or change portions of the package may
be issued. Each addendum will be provided to all bidders. If a bidder performs work knowing it
to be contrary to such laws, ordinances, codes, rules or regulations and without giving notice, he
shall bear all costs arising therefrom.

The bid price shall cover all costs, including applicable state and local sales taxes, any shipping,
handling, and freight charges, and any subcontractor fees. The bid price shall be valid for a period
of 6 months from bid opening. The bid shall be a lump sum cost based on the job requirements
provided herein. Bid selection will be based upon the provided price and other criteria listed in
this document.

Bids are due as soon as possible and should be emailed to Ryan Kerins at
[e-mail]. Questions can also be directed to that email and will be provided
to Terraquest’s engineer as required for response.

Bid Evaluation

A purchase order will be awarded to the lowest responsible bidder as soon as practical given the
constraints of the regulatory process through the NCDWM-UST including the pre-approval
process, required meetings, and record of decision.

II. GENERAL CONDITIONS

Standards and Codes

The enclosures, plumbing, equipment integration, etc. shall meet all current, applicable
regulations and codes. These include, but are not limited to, North Carolina Building and
Plumbing Codes, National Electrical Code (NEC), National Fire Protection Association (NFPA)
standards, and other applicable local, state, and/or federal codes. The vendor shall be
responsible for providing equipment and assembly to meet applicable codes. Documentation

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
iii Troutman, Iredell County, North Carolina
detailing the third party certification of the system (entire system including control panel) must
be provided. The third party shall be a national-recognized testing laboratory recognized by the
US Department of Labor (see http://www.osha.gov/dts/otpca/nrtl/) and acceptable to Iredell
County and the Town of Troutman, NC. An engineer must seal the system enclosure drawings to
comply with all local building codes including any Appendix B building code forms.

Warranty and Performance Guarantee

Vendor shall warranty all equipment for a period of 1 year. The warranty period shall commence
upon successful completion of testing of the remediation system, after installation at the subject
site. Warranty shall cover all parts, workmanship, and labor. Vendor shall provide new
replacement parts, necessary installation labor, and all other associated costs at no charge.

Vendor shall also provide a performance guarantee of the remediation system. Performance
testing will be conducted after successful startup. All equipment components shall operate as
intended. The vendor shall repair or replace, at no cost, any and all equipment necessary to meet
the performance requirements.

Submittals and Schedule

The vendor shall be able to provide a completed system on-site within 60 days of receiving
approval to proceed.

Prior to delivery, the enclosure and entire equipment contents including the control panel shall
be third party certified. The third party shall be a national-recognized testing laboratory
recognized by the US Department of Labor and acceptable to Robeson County and the Town of
Parkton. The vendor should provide the electrical amp load and service size of the system to the
installation contractor.

Two sets of drawings and specifications are required, and the following items shall be included:

• for building inspection purposes - third party’s certification of the enclsoures; OR
plans sealed by a licensed architect or engineer;
• total electrical amp load, service size, and completed electrical section of Duke
Energy Progress load sheet for system (attached to this bid request).

Unless otherwise noted, the makes and models written in these specifications are intended to
denote quality and/or performance standards but do not restrict the bidder to those makes and
models. All primary components, if different from the makes and models provided herein, must
be approved. Failure to provide adequate information may result in disqualification. Equipment
that does not meet the intent and requirements of the bid specifications will be rejected and
must be substituted with acceptable equipment. Failure on the part of the bidder to provide
acceptable equipment will be grounds for disqualification and order cancellation.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
iv Troutman, Iredell County, North Carolina
Upon system delivery, the equipment vendor shall supply two comprehensive user’s manuals.

Those manual shall contain:

• copy of the third party’s certification of the system’s control panel,
• wiring diagrams of electrical components including ladder diagram of system
control system;
• manufacturers’ cut sheets for components of the system;
• summary sheet of serial numbers, model numbers, and replacement part
numbers.

The manuals shall contain all equipment specification sheets, manufacturers’ manuals, and
warranties. They shall provide written documentation for the operation and maintenance of the
remediation system. The manuals shall also list the serial numbers of all equipment and provide
part numbers for disposable items such as lubricants and filters that need to be changed
regularly.

Vendor shall be onsite during system delivery. Delivery of the system may be completed by a
third party, however, neither the engineer, Terraquest, nor the Owner are required to be onsite
during the unloading process. If personnel or equipment is required to unload the vendor’s
system, that cost will be paid by the vendor net 30 at cost plus 15% markup.

Insurance

Prior to working on the site under this bid, the successful bidder shall obtain the following
minimum coverages from an authorized North Carolina insurance carrier:

• Workmen’s Compensation - the vendor shall take out and maintain during this job
Workmen’s Compensation Insurance for all its personnel employed at the site of
construction. If any work is subcontracted, the vendor shall require the
subcontractor similarly to provide Workmen’s Compensation Insurance for the
subcontractor’s employees.

• Public Liability and Property Damage - (General Liability) - the vendor shall take
out and maintain during this job such public liability and property damage
insurance as shall protect him and any subcontractor performing work covered by
the bid, from claims or from damage or personal injury, including accidental death,
as well as from claims for property damage which may arise from operation under
this bid, whether such operations be by himself or by any subcontractor, or by
anyone directly or indirectly employed by either of them and the minimum
amounts for such insurance shall be as follows:

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
v Troutman, Iredell County, North Carolina
• Public Liability Insurance in an amount of no less than $100,000 for injuries,
including accidental death to any one person, and subject to the same limit to
each person, in an amount not less than $300,000 on account of one accident;

• Property Damage Insurance in an amount not less than $500,000. The coverages
as stated shall not be canceled or changed until ten days after written notice of
such termination or alteration has been received by Terraquest.

• A copy of vendor’s certificate of insurance for each of the above coverages shall
be provided upon request.

Equipment Vendor’s Subcontractors

The equipment vendor is and remains fully responsible for his own acts or omissions as well as
those of any subcontractor that said vendor may retain, hire, or purchase from. The vendor
agrees that no contractual relationship exists between vendor-subcontractors, the engineer,
Terraquest, or the Owner in regard to the contract, and those subcontractors act on this work as
an agent or employee of the equipment vendor. The equipment vendor agrees that the terms
of these contract documents shall apply equally to each subcontractor, and the equipment
vendor agrees to take such action as may be necessary to bind each subcontractor to these terms.

Payment

The bid price for equipment and system assembly will be payable within 10 days of receipt of
payment from the NC Leaking UST Trust Fund.

Note that payment will be withheld if the system components fail to meet the requirements
detailed in this bid specification including construction such that local building codes are fulfilled
and permits can be procured.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
vi Troutman, Iredell County, North Carolina
III. BID FORM

Soil and Groundwater Remediation System
Perth Mini Mart
818 Perth Road, Troutman, Iredell County, North Carolina
NCDWM-UST Incident No. 40784
Terraquest Environmental Consultants, P.C Project No. 08217

The undersigned has carefully examined the Bid Document and fully understands it.___(initial)

7.065 Lump Sum Price for Equipment: $____________________
(Includes: Assembly, Delivery, and NC Sales Tax)

Company Name: _________________________________________________________

Company Address: _________________________________________________________

_________________________________________________________

Company Phone: _________________________________________________________

Company Fax: _________________________________________________________

Signature and Date: ___________________________________ ___________________

CHECKLIST (PLEASE INTIAL EACH ITEM)
Each of the following has been included or addressed:

______COST BREAKDOWN SHEET ON COMPANY LETTERHEAD

______NC SALES TAX HAS BEEN INCLUDED IN THE ABOVE BID PRICE

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
viii Troutman, Iredell County, North Carolina
BID SPECIFICATION - EQUIPMENT - COST BREAKDOWN
Date: 6/14/22 Incident Name: Perth Mini Mart Incident No.: 40784
ITEM DESCRIPTION COST
SVE equipment enclosure with control panel, heating/cooling mechanisms/equipment. Includes
third party certification, labor to assemble prior to delivery. $_____________________
Soil vapor extraction system. Includes regen blower, moisture knockout drum, floats, electrical,
plumbing, header, pressure gauges, meters, and assembly labor. $_____________________
Air sparge system. Includes enclosed compressor, filters, regulators, meters, gauges, header, and
assembly labor. $_____________________
Electric vapor oxidizer and appurtenances $_____________________
Miscellaneous supplies not covered above. $_____________________
Taxes, shipping-handling and freight fees for parts, and system delivery. $_____________________
TOTAL SYSTEM COST $_____________________
In an effort to expedite the bid review, bidders are required to provide a breakdown of the lump sum cost. To make this as
easy as possible and to alleviate concerns over proprietary costs, this generic breakdown of costs was prepared. Based upon
your lump sum cost, please estimate costs as shown above. This is only meant to provide justification for the lump sum price
and will not be used for final payment. Final payment will be based upon your invoiced amounts up to the bid price unless
amount modifications have been made and approved by John Haselow.

Documentation detailing the third party certification of the system (entire system including control panel) must be provided. The
third party shall be a national-recognized testing laboratory recognized by the US Department of Labor (see
http://www.osha.gov/dts/otpca/nrtl/) and acceptable to Iredell County. Winning bidder’s engineer must seal the system building
drawings in order to comply with all local building codes including any Appendix B building code forms.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
1 Troutman, Iredell County, North Carolina
IV. DETAIL SPECIFICATIONS

The remediation system will remove free product and treat petroleum-contaminated soil and
groundwater. The goal of the treatment system is to remove free product and most petroleum-
type contaminants present in soil at concentrations in excess of the Soil-to-Groundwater
Maximum Soil Contaminant Concentrations and in groundwater at concentrations exceeding the
Gross Contamination Levels within two years. The remediation system will consist of a
regenerative vacuum blower, a rotary screw air compressor, an electric oxidizer for vapor
treatment, and appurtenances either self-contained or within an enclosure that will be placed
onsite and connected to piping and hosing to vent and sparge. Vent wells have also been placed
to recover sparge vapors from beneath nearby structures. For the SVE blower, Terraquest is
requesting it be housed in a metal enclosure. The SVE, with oxidizer, and air sparge systems will
be controlled by a single electrical panel mounted on the outside of the enclosure.

The following figures are included as part of this bid specification document and should be
reviewed by all bidders:

Figure 1 – Site Location Map Figure 4 – SVE and Air Sparge Layout
Figure 2 – Site Vicinity Map Figure 5 – Process and Instrumentation Diagram
Figure 3 – Site Layout Map

Soil vapor extraction (SVE) will occur at ten (10) wells and air sparging will occur through seven
(7) wells at the locations shown on Figures 4 and 5. All wells and trenching will be installed by
others and are not part of this bid request. Vacuum lines and compressed air hose, provided and
installed by others, will terminate where the equipment enclosures requested in this quote are
to be placed. This bid specification requests a price for the equipment necessary to deliver
vacuum and compressed air to the well network.

Power will be provided to the site by Duke Energy. Three-phase 120/208V power will be provided
to the site. Questions should be directed to Terry Helton, Duke Energy, 336-407-7883
[e-mail].

The detailed specifications are broken into the following sections:
A. Vacuum Package D. Enclosures and Accessories
B. Compressed Air Package E. Delivery, Installation, and Startup
C. Control System, Flow Meters/Pressure Gauges, Hose/Pipe

The Subcontractor shall have the remediation system including the control panel certified by a
national-recognized testing laboratory recognized by the US Department of Labor (see
http://www.osha.gov/dts/otpca/nrtl/) and acceptable to Iredell County and the Town of Troutman.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
2 Troutman, Iredell County, North Carolina
A. VACUUM PACKAGE

SVE:

Vacuum will be applied to the ten (10) SVE wells via a regenerative blower equal to or better than
an R7100A-3. The equipment is sized based on vacuum requirements from pilot testing that
showed vacuum up to 54 inches of water with associated vacuum air flow of 20 cfm. Allowing
for heterogeneities in the soil matrix and adding flow from ten total wells, overall performance
of the selected blower is 65 inches of water and 200 cfm air flow.

The SVE system should have the following as detailed on Figure 5:

• exhaust stack with valve for sampling,
• an exhaust muffler,
• automatic vacuum relief valve,
• fifty-five gallon moisture knockout tank with equipment necessary to release water when
full. This equipment should include a particulate air filter, a clear PVC sight tube with a
three float assembly that indicates on, off, and high level conditions. The on and off
functions should be integrated to start up/shut off the SVE blower with moisture
accumulation. Moisture accumulated in the knockout tank will be released onto the
ground surface via a hose or pipe leaving the tank. This tank should have mounting tabs
so that it can be bolted to the concrete pad outside of the equipment enclosure. Piping,
hose, and wiring from enclosure to tank should be provided.
• acoustically insulated; maximum full load noise level of blower at 5 feet from enclosure
shall not exceed 70 dB(A),
• to guard against nuisance noise, a VFD should control the blower and operate on a
remotely adjustable timer so the unit can throttle up or down providing sparge vapor
recovery at all times but significantly reduce noise as required,
• skid-mounted enclosure and equipment shall contain sufficient cooling to prevent
overheating in typical NC summers.

Vapor processing system:

Recovered soil vapors and air sparge emissions shall be processed through an electric catalytical-
tyle oxidizer prior to release into the atmosphere. Plumbing from the SVE unit to the oxidizer
should be provided and can be installed on site, BUT, it is vendors responsibility to do so. Not
the ground-work installers.

• volatile organic compounds (VOCs) from the SVE exhaust shall be treated by an oxidizer
prior to venting to the atmosphere,
• Treatment shall be designed to treat up to 300 cfm of air and shall be of similar or better
quality to a FALCO 300 unit,
• VOC destruction should be of 99% efficiency or better,

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
3 Troutman, Iredell County, North Carolina
• Unit should be electric (no propane/natural gas required) and should be three phase
120/208V as previously noted,
• Should have a fifteen (15) foot emissions stack with a vapor collection port at ~4-5’.

B. COMPRESSED AIR PACKAGE

Air Sparge:

The system will supply the necessary pressure and flow of compressed air to the network of air
sparging wells. Based on pilot testing, air flow will be 4 cfm for each of seven (7) wells for a total
air demand of 28 cfm. The associated pressure was 17 psi and an additional 50% is requested to
allow for deviations (26psi).

As the technology requires continuous duty and 28 cfm air flow, several compressor types can
be ruled out. Pancake and reciprocating compressors do not have the duty cycle for this job.
Rotary vane compressors typically do not have sufficient pressure to meet the requirements and
they are too noisy to use at this facility without a large effort toward noise reduction while
keeping the internal temperature down to prevent overheating. Dry piston pumps (similar to
Airtech) do not have the flow requirements at pressure sufficient to work for this job. With these
eliminations, a rotary screw appears to be one of the few options that is suited for the
specifications.

The air compressor provided shall be a rotary screw-type compressor of equal or better quality
as an Ingersoll Rand UP6 10 HP 125 cfm (2080V 3PH). The system shall include the following:

• should be a stand-alone unit with its own enclosure that has weather guards for colling
inlets and outlets,
• Ingersoll Rand UP6-10-125 compressor with three-phase motor. Capable of 28 scfm at
26 psi,
• continuous full flow operation 7 days/week, 24 hours/day at the rated capacity and
pressure,
• compressor should be configured to idle when not loading; compressor should not start
and stop for each loading event,
• compressor shall include the manufacturer-approved motor starter and motor shall be
thermally protected,
• unit shall come shipped with manufacturer-specified coolants and/or lubricants and
sufficient extra parts as coolant, coolant-particulate filter, and air particulate filters for
first six months of operation at continuous operation (all manufacturer’s recommended
maintenance fluids and parts for first six months of operation),
• unit shall come with an adjustable high-end and low-end pressure discharge switch,
• adjustable pressure relief valve for discharge air-line,
• manual brass ball valve for discharge air-line,

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
4 Troutman, Iredell County, North Carolina
• shall be acoustically insulated; maximum full load noise level of compressor at 5 feet from
enclosure shall not exceed 70 dB(A),
• operation hour meter,
• on-off switch,
• automatic restart function following power outages (an onsite manual restart of
compressor will not be required).

In addition to all equipment required for the normal operation of the compressor, the following
accessories should also be included:

• 80 gallon holding tank – installed beneath the air compressor (to allow ground clearance
of compressor for electric code requirements.),
• tank should be outdoor-rated,
• holding tank shall contain a brass ball-valve that can be used to throttle flow from the
tank,
• timer-driven automatic moisture knockout similar to Intech MCDV-25 from holding tank
(no float-driven or pressure-reduction auto knockouts),
• 5 micron general purpose pre-filter with manual drain similar to Wilkerson F28-06-SK00,
• 1 micron general purpose filter similar to Speedaire 4GNP9,
• 0.01 micron heavy duty oil coalescing filter with manual drain similar to Speedaire 4ZL54,
• regulator similar to Wilkerson R28-06-F000 with 0 – 200 psi pressure gauge which will
control header (described below).

The sparge and vent systems, including all components listed as accessories, shall be pre-piped,
fully-assembled and factory tested. The package shall include piping, valves, controls, and
internal wiring. The system shall require connection to power, piping, and hosing only for a
complete and operational system.

C. CONTROL SYSTEM, FLOW METERS/PRESSURE GAUGES, HOSE/PIPE

Control panel shall consist of NEMA 4 enclosure. It shall contain:

• breakers in the control panel for lights, fan, blower, compressor, solenoids, etc.,
• all HOA switches, run lights and alarm lights,
• all motor starters and contactors not incorporated in subpanels associated directly at
equipment (i.e. air compressor),
• an EOS Research, Ltd, ProControl programmable logic controller
(http://www.eosresearch.com/Site/Home.html) or equivalent with remote access and
reporting capability and ability to log up to 1,000 data points. A cellular data modem kit
modem kit with 3dBi antenna and ProControl firmware update should be provided. The
Subcontractor will coordinate with Ron Gehl of EOS Research, Ltd. (159 Walnut St,
Rochester, NH 033867 603-322-2099) to set up the wireless service for Terraquest.
Subcontractor should also purchase and provide to Terraquest the online software

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
5 Troutman, Iredell County, North Carolina
download required for operation from http://www.fabulatech.com/serial-port-
redirector.html. Subcontractor should pay EOS for first year of cellular service.
• switches and lights as tabled below:
Control Panel Switches and Indicators Item Switch Type Indicator Light Control Circuit on/off green SVE regen blower HOA green
Compressed air solenoid valve HOA green Motor Overload light only red Panel Lights Check push - Reset push red

The control panel enclosure for the remediation system shall be securely mounted on an outside
wall of the equipment structure or placed at an accessible level on framing with bolt down tabs
that can be secured to the concrete pad. The control panel shall consist of a key-locked dead-
front door (to provide security against vandals tampering with the controls) with an interior swing
door (to provide NEMA Type 4 protection to the controls). All breakers for the system shall be
included inside the interior swing door. All motor starters and overload devices will be placed
within the interior swing door with relay controls. It is understood that the compressor likely has
its own panel with such protection.

System control should be designed so that air sparging cannot occur unless SVE is active.

Flow/Pressure Gauges:
SVE system:
The regenerative blower should have a main trunk line that will branch out and split for each
individual wells as shown on Figure 5. Ball valves and vacuum gauges should be provided loose
that can be installed at each wellhead by the installation subcontractor. Those gauges should be
liquid-filled and of a 0-100 inches of water scale with a 2.5” face and a bottom-placed ¼” NPT
male connection.

Air injection and sparge:
Compressed air discharged by the air compressor shall be piped to a header with a pressure
regulator (similar to a Wilkerson R28-06-F000 with integrated pressure gauge) as shown on
Figure 5. The header should be shipped loose and can be mounted externally to fencing installed
by others near the air holding tank. Time, travel, and materials for said mounting should be
included. The header should be inside a secure padlocked-box or other structure to prevent
tampering with the gauges.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
6 Troutman, Iredell County, North Carolina
Each well shall receive its own dedicated 3/8” 200 psi air supply hose regulated by an adjustable
flow meter (similar to Dwyer RMC-121-SSV), with associated ball valve, and monitored with a
pressure gauge (liquid-filled 0-100 psi) as shown on Figure 5. Each flow meter and pressure gauge
shall be labeled as to what it services (AS1-7) in such a manner as to remain visible over time (i.e.
no permanent marker). Hose barbs should be placed on the back of each flow meter that the
installation subcontractor can connect their hosing from the well onto. The air sparge header
bank should be secured against unauthorized personnel adjusting the gauges either in a locked
box or some other type of prevention.

Hose/Pipe:

The appropriate piping/hosing and connectors shall be supplied to connect the regenerative
blower to the 2” PVC piping that will run to the wells and from the rotary screw compressor to
the associated header. Piping from the equipment enclosure to each SVE well will be provided
by the installation subcontractor. Hosing from each flow gauge to the air sparge wells will also
be provided by the install sub.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
7 Troutman, Iredell County, North Carolina
D. ENCLOSURE AND ACCESSORIES

Terraquest anticipates placement of the equipment as follows:

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
8 Troutman, Iredell County, North Carolina
Conceptual – not to scale
Equipment area

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
9 Troutman, Iredell County, North Carolina
As previously noted, Terraquest requests that an enclosure be provided to house the SVE
blower. The air sparge compressor should be contained within its manufactured enclosure.

Requirements of the SVE enclosure include:

• Shall have a size of 60 inches high, 36 inches wide, and be 72 inches in length,
• Metal structural framing and siding of 16 gauge thickness,
• Both long-sides of the enclosure should have hydraulic assist doors that swing open,
• Mounting tabs should be incorporated onto the structure to secure it to a concrete pad,
• Passive heat vents (slits) shall be incorporated,
• A louvered exhaust fan shall be incorporated into one of the short sides,
• The interior walls of the enclosure shall be covered in a sound deadening rubber foam,
• An ambient temperature switch should be incorporated into the system to prevent
overheating of the blower within the enclosure,
• “818” metal address label shall be bolted to outside of the enclosure in a direction facing
the street where they can be seen by emergency personnel,
• Thermostatically controlled XP exhaust fan (must be rated Class 1 Division 2),
• Documentation detailing the third party certification of the system as an entirety must be
provided. The third party shall be a national-recognized testing laboratory recognized by
the US Department of Labor and acceptable to Iredell County and the Town of Troutman.

Equipment Integration

• Interior equipment shall be pre-installed and secured,
• Interior electrical circuits shall be pre-installed. Wiring shall meet NEC standards,
• Control panel shall be wired for the intended functions,
• Interior plumbing shall be pre-installed and braced. Unless otherwise stated, all piping shall
consist of Type 1 Schedule 80 PVC or reinforced discharge hose,
• Exterior plumbing shall be provided, braced, and installed by equipment vendor onsite as
required.

Testing

• All equipment components shall be pre-tested at the factory and inspected for defects.

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
10 Troutman, Iredell County, North Carolina
E. Delivery, Installation, and Startup

Delivery

• All equipment shall be delivered to the site in Troutman, Iredell County, NC. The site
address is 818 Perth Road, Troutman, NC 28166. Delivery shall be coordinated with
Terraquest.

Installation

• The equipment vendor shall offload the SVE enclosure, oxidizer, and sparge compressor
at the site in accordance with Terraquest’s instructions. If unloading equipment is
required, the equipment vendor should provide such equipment. Equipment vendor
should not rely on installation ground work contractor for any assistance.
• Off-loading of equipment, including any necessary traffic control, at the site is equipment
vendor’s responsibility.
• Final pipe and hose connections will be provided by groundwork installation contractor.
• The main electrical service into the shed will be provided by others.

Startup

• Startup and Training: Vendor shall provide trained personnel for a minimum of 1 day (8
hours) for on-site startup assistance and operational training. An additional 8 hours of
offsite phone support is also required.

ONSULTANTS, P.C.CENVIRONMENTAL
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. i Troutman, Iredell County, North Carolina
BID SPECIFICATION
SOIL AND GROUNDWATER REMEDIATION SYSTEM - INSTALLATION
PERTH MINI MART
7/6/22

Certification:

I, Michael J. Brown, a Licensed Geologist and I, John S. Haselow, a Licensed Engineer in the State
of North Carolina for TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C. do certify that the
information contained in this report is correct and accurate to the best of my knowledge. All
work was performed under my direct supervision. My seal and signature are affixed below.
Additional seals and/or signatures are also listed.

Terraquest Environmental Consultants, P.C. is licensed to practice geology and engineering in
North Carolina. The geology certification number of the corporation is C-291. The engineering
certification number of the corporation is C-4634. Engineering is practiced out of the Cary, NC
office.

TERRAQUEST ENVIRONMENTAL CONSULTANTS, P.C.

Ryan D. Kerins Michael J. Brown, P.G. John Haselow, PhD, PE
Project Manager President Senior Engineer

I. INSTRUCTIONS TO BIDDERS

This bid package is for the installation of a soil and groundwater remediation system to treat
petroleum contamination at the Perth Mini Mart property located in Troutman, Iredell County,
North Carolina. The site’s location is shown in the attached Figure 1 and the site vicinity is
depicted in Figure 2. Figure 3 displays a general site layout. This bid document contains General
Conditions, a Bid Form, Detail Specifications, and Figures. Terraquest has prepared this
document on behalf of Madhukunj, LLC.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. ii Troutman, Iredell County, North Carolina
Within these bid documents, “Project Manager” and “Contractor” shall refer to Terraquest.
“Bidder” shall be any party responding to this bid request. “Subcontractor” shall be the
successful bidder which enters into an Agreement for Services with Terraquest. “Sublet
contractor” shall refer to any contractor or company retained by the Subcontractor to provide
special services to the project. “Equipment Vendor” shall refer to the party which will provide
the remediation system equipment (blower, compressor, controls, equipment enclosures, etc.).
The scope of work shall include but is not limited to construction of a concrete pad, trenching
from future equipment pad to wells, placement of piping and conduit in trenching, providing and
chasing hosing through conduit, connection of piping and hosing to wells, covering of trenching
and surface repair, supply and installation of a power pole, meter base, main disconnect,
electrical conduit, wire, and fittings into the equipment enclosure’s control panel, power
connection from meter to control panel provided by others, final connection of system piping
and hosing, and procurement of necessary local permits including zoning, building, electrical,
plumbing, etc. Remediation equipment will be supplied by others.

Preparation of Bids

Bids shall be submitted on the Bid Form provided in Section III of this package and the bidder
must also provide a rough breakdown of costs on the enclosed Cost Breakdown table. The Cost
Breakdown table is a requirement of the NC Leaking UST Trust Fund and must be received for
your bid to be considered. To make the process easier and to alleviate concerns over proprietary
costs, Terraquest has prepared this generic breakdown of costs that must be filled out by all
bidders. Based on the lump sum cost, bidders should estimate their rates, quantities, and costs
as shown in the cost breakdown sheet. This cost breakout is only meant to provide justification
for the lump sum price and will not be used for final payment. Final payment will be based upon
the bidder’s invoiced amounts up to the bid price unless amount modifications have been made
and approved by Terraquest. The bid may be rejected if it shows any kind of omission, alteration
of form, conditional bid or irregularities of any kind.

If a bidder finds mistakes, omissions, or inconsistencies in the bid package or needs clarification,
Terraquest should be promptly notified. If the bidder finds the specifications to be at variance
with any applicable law, ordinance, code, rule or regulation, he shall promptly notify Terraquest
in writing. Terraquest may issue written addenda to clarify, correct, or change portions of the
package. Each addendum will be provided to all bidders. If a bidder performs work knowing it to
be contrary to such laws, ordinances, codes, rules or regulations and without giving notice to
Terraquest, he shall bear all costs arising therefrom.

The bid shall be a lump sum cost based on the job requirements provided herein. The bid price
shall cover all costs, including applicable state and local sales taxes, any shipping, handling, and
freight charges, and any subcontractor fees. The bid price shall be valid for a period of six months
from bid opening. Note that CHANGE ORDERS WILL NOT BE PAID UNDER ANY CIRCUMSTANCES
FOR THE SPECIFIED SCOPE OF WORK. This is a requirement of the North Carolina Leaking
Underground Storage Tank Trust Fund and is non-negotiable. All work beyond the scope of work

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. iii Troutman, Iredell County, North Carolina
contained in this bid document must be approved by Terraquest and the North Carolina Division
of Waste Management-Underground Storage Tank Section (NCDWM-UST).

Bids are due as soon as possible and should be emailed to Ryan Kerins at
[e-mail]. Questions can also be directed to that email.
Bid Evaluation

A purchase order will be awarded to the lowest responsible bidder as soon as practical given the
constraints of the regulatory process through the NCDWM-UST including the pre-approval
process, required meetings, and record of decision.

II. GENERAL CONDITIONS

Standards and Codes

The Subcontractor shall be responsible for knowledge of all federal, state, and local laws,
regulations, and ordinances which may apply to or affect the scope of work or those persons
involved with or affected by the work. The Subcontractor will adhere to the 2012 North Carolina
Building Code and the 2017 National Electrical Code (NFPA 70) and any updates or newer
versions.

The construction shall meet the current North Carolina building codes, as required by Robeson
County and the Town of Parkton, and all applicable OSHA trenching and safety regulations. All
electrical components and wiring shall meet the current National Electrical Code (NEC). The
vendor shall be responsible for providing equipment and assembly to meet the applicable codes.
Schedule

Construction shall be completed within 20 calendar days of Subcontractor mobilization to the
site. “Completion” shall mean fulfillment of the Agreement for Services and this bid specification.
Failure to complete the installation within the stated time period will result in penalty in the form
of reduction in payment to the Subcontractor’s bid price. The reduction will be 1% of the bid
price for each day work continues after the required completion date. A day shall begin at 12:00
am (midnight) and end on the following midnight. In the event that unforeseen conditions or
occurrences are encountered by Subcontractor, which could alter the completion time, the
Subcontractor should immediately notify Terraquest. Neither party shall be responsible for
delays, failures, or omissions due to any cause beyond its control, and not due to its own
negligence and which cannot be overcome by the exercise of due diligence, including, but not
limited to, sickness, labor disturbances, riots, fires, earthquakes, acts of God, and other similar
causes.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. iv Troutman, Iredell County, North Carolina
Subletting

The Subcontractor may retain other contractors to provide specialized services (e.g. electrical
power base installation or concrete work) provided that contractor is fully qualified and licensed
as necessary to perform the work.

The Subcontractor is and remains fully responsible for his own acts or omissions as well as those
of any sublet contractor or of any employee of either. The Subcontractor agrees that no
contractual relationship exists between the sublet contractor and Terraquest or owner in regard
to the project, and the sublet contractor acts on this work as an agent or employee of the
Subcontractor. The Subcontractor agrees that the terms of these contract documents shall apply
equally to each sublet contractor, and the Subcontractor agrees to take such action as may be
necessary to bind each sublet contractor to these terms.

Insurance

Prior to working on the site under this bid, the Subcontractor shall have or obtain the following
minimum coverages from an authorized North Carolina insurance carrier.

• Workmen’s Compensation - the Subcontractor shall take out and maintain during this job
Workmen’s Compensation Insurance for all its personnel employed at the site of
construction. If any work is subcontracted, the Subcontractor shall require the contractor
similarly to provide Workmen’s Compensation Insurance for the contractor’s employees.

• General Liability and Property Damage - the Subcontractor shall take out and maintain during
this job such public liability and property damage insurance as shall protect him and any
contractor working for the Subcontractor, from claims or from damage or personal injury,
including accidental death, as well as from claims for property damage which may arise from
operation under this bid, whether such operations be by himself or by any contractor, or by
anyone directly or indirectly employed by either of them and the minimum amounts for such
insurance shall be as follows:

General Liability Insurance in an amount of no less than $500,000 for injuries, including
accidental death to any one person, and subject to the same limit to each person, in an
amount not less than $500,000 on account of one accident;

• The coverages as stated shall not be canceled or changed until ten days after written notice
of such termination or alteration has been sent to Terraquest.

Material and Equipment

Materials to be installed shall be new and of first quality. Used, damaged, or defective materials
will not be permitted.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. v Troutman, Iredell County, North Carolina
All construction materials specified herein, tools, and necessary equipment shall be supplied by
the Subcontractor. Remediation equipment will be supplied by an equipment vendor. (See
Detailed Specifications for further explanation.)

Work Conduct

The Subcontractor shall use standard and necessary safety procedures during construction. Hard
hats must be worn by all personnel working around overhead hazards, including backhoe
operations. Orange web fence shall be used to barricade open excavations overnight and while
work is not in progress. Cones, webbing, and all other necessary safety materials and equipment
shall be supplied by the Subcontractor. The Subcontractor shall exercise due caution while
working near buildings, underground utilities, and overhead power lines. NC One Call and local
utilities should be notified in sufficient advance time to allow for marking of utilities. Private,
onsite utilities should be marked by an independent contractor qualified to do so. As shown on
the pictures attached at the end of this bid package, there are significant utilities at this site that
should not be damaged.

Disposal of Construction Debris

Subcontractor shall be responsible for proper disposal of all construction rubble, unused clean
soils and backfill, material scraps, refuse, and waste. No disposal shall be permitted on the
subject property unless authorized by Terraquest. While clean soil can be backfilled into the
trenches following insertion of the SVE piping and air sparge conduit, any encountered
contaminated soil will need to be stockpiled onsite by the Subcontractor. A minimum of $300
needs to be incorporated into this bid to account for plastic, berming material, labor, etc. to cover
the stockpiled soil so that rain cannot wash contamination off of the stockpile onto other areas.
The Subcontractor is not responsible for offsite transport of contaminated soils or the
disposal/remedial costs associated with contaminated soils. Under no circumstances shall work
to further excavate, stockpile, or dispose of contaminated soil be conducted by the Subcontractor
without prior instruction from Terraquest.

The site shall be left in a clean and neat condition by the Subcontractor. All equipment, materials,
refuse, et cetera shall be removed from the premises before the project is deemed complete and
payment will be made.

Payment and Warranty

Payment terms are provided in the attached typical Agreement for Services that will be signed
between winning bidder and Terraquest. The Agreement states that payment will be made
within ten (10) days of Contractor’s receipt of payment from the North Carolina Leaking UST Trust
Fund and invoice and supporting documentation from Subcontractor.

The Subcontractor shall provide a one-year warranty on all materials, workmanship, and labor.
Any defects shall be repaired by the Subcontractor at no labor, material, parts, or shipping costs.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. vi Troutman, Iredell County, North Carolina
This warranty shall apply to all work performed by any other contractors retained by the
Subcontractor. The Agreement for Services further discusses the terms of the warranty.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. vii Troutman, Iredell County, North Carolina
III BID FORM

Installation of a Remediation System
Perth Mini Mart
818 Perth Road, Troutman, Iredell County, North Carolina
NCDWM-UST Incident No. 40784
Terraquest Environmental Consultants, P.C Project No. 08217

The undersigned has carefully examined the Bid Document and fully understands it.

7.100 Lump Sum Price for Installation (Includes NC Sales Tax): $____________

Company Name: _________________________________________________

Company Address: _________________________________________________

_________________________________________________

_________________________________________________

Company Phone: _________________________________________________

Company Fax: __________________________________________________

Signature and Date: ___________________________________ ___________

CHECKLIST (PLEASE INTIAL EACH ITEM)
Each of the following has been included or addressed:

______COST BREAKDOWN SHEET ON COMPANY LETTERHEAD

______NC SALES TAX HAS BEEN INCLUDED IN THE ABOVE BID PRICE

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. viii Troutman, Iredell County, North Carolina
BID SPECIFICATION - INSTALLATION WORK - COST BREAKDOWN FORM
Date: 7/6/22 Incident Name: Perth Mini Mart Incident No.: 40784
ITEM DESCRIPTION RATE COST
JOB TIME
Manhours _____________hours $_____________________________/hour $_____________________
Permit time _____________hours $_____________________________/hour $_____________________
JOB EQUIPMENT
Equipment MOBE/DEMOBE and all fuel costs $_____________________
cut saw ______________________days $_____________________________/day
backhoe/trackhoe ______________________days $_____________________________/day $_____________________
skid steer ______________________days $_____________________________/day $_____________________
dump truck ______________________days $_____________________________/day $_____________________
other equipment ______________________days $_____________________________/day $_____________________
other equipment ______________________days $_____________________________/day $_____________________
other equipment ______________________days $_____________________________/day $_____________________
JOB MATERIALS
Hose, pipe, fittings, expendable plumbing $_____________________
Trench repair asphalt areas (dyed concrete) $_____________________
Concrete pad $_____________________
Electrical pole and connection coordination $_____________________
Daily per diem $_____________________
Miscellaneous supplies not covered above $_____________________
Taxes, shipping and handling and freight fees $_____________________
TOTAL $_____________________
In an effort to expedite the bid review, bidders are required to provide a breakdown of the lump sum cost. To make this as easy as possible and to
alleviate concerns over proprietary costs, this generic breakdown of costs was prepared. Based upon your lump sum cost, please estimate rates,
quantities, and costs as shown above. This is only meant to provide justification for the lump sum price and will not be used for final payment. Final
payment will be based upon your invoiced amounts up to the bid price unless amount modifications have been made and approved by Terraquest.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 1 Troutman, Iredell County, North Carolina
IV. DETAIL SPECIFICATIONS

Project Overview

The responsible party has been directed to prepare a Corrective Action Design Report that
proposes the installation of a remediation system to treat petroleum-contaminated soil and
groundwater for the Perth Mini Mart release incident. This bid request involves the installation
work associated with implementation of that system. The goal of the treatment system is to
remove the majority of petroleum-type contaminants present in soil at concentrations in excess
of the Soil-to-Groundwater Maximum Soil Contaminant Concentrations and in groundwater at
concentrations exceeding the Gross Contamination Levels within two years. The remediation
system will treat free product and petroleum-contaminated soil via Soil Vapor Extraction (SVE)
and groundwater via air sparging. The remediation system, supplied by others, will include a
regenerative blower and a rotary-screw air compressor and appurtenances. The SVE blower will
arrive in a metal utility box enclosure with an exterior moisture knockout drum that will be bolted
to a poured concrete pad that will also support an associated vapor processing system (oxidizer)
and the compressor and holding tank and flow gauges and control panel that may be on metal
struts. The enclosure and flow gauge manifold will have connections for the SVE and air sparge
wells. Piping, conduit, hosing, and trenching are part of this bid request.

The following figures are included as part of this bid specification document and should be
reviewed by all bidders:

Figure 1 – Site Location Map
Figure 2 – Site Vicinity Map
Figure 3 – Site Layout Map
Figure 4 – Soil and Groundwater Remediation Layout
Figure 5 – Typical Trench Detail

Scope of Work Summary

A brief summary of the scope of work is provided here. Further details follow.

• Obtain necessary building, electrical, and plumbing permit(s) from Iredell County and the
Town of Troutman prior to construction. If needed, this includes the Schedule B of the
building permit with engineer seal as needed. Terraquest will provide equipment cut
sheets as needed.

• Pour a concrete pad sufficient to mount equipment in accordance with code. Terrquest
anticipates something similar to a 12’ x 20’ x 4” pad. Area should be graded and leveled
with stone as required prior to forming pad. Pad should have chamfered edges and a

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 2 Troutman, Iredell County, North Carolina
brush finish. Possible pad layout is shown on next page – final placement should be
coordinated between Terraquest, the equipment vendor, and the install vendor:

• Dig trenches to connect the equipment with the remedial wells.

• Trench for SVE piping and air sparge delivery via conduit and hose or HDPE. Supply and
place SVE piping and air sparge hose and conduit in trenches as noted on Figure 4.
Vacuum piping should be 2”-diameter Schedule 40 PVC or HDPE equivalent and air sparge
conduit should be Schedule 40 PVC also or direct bury HDPE with no conduit required. Air
sparge hose (3/8”-diameter 200 psi) should also be provided and chased through conduit
if HDPE is not used. Individual lines of HDPE piping for vacuum and pressure air delivery
is acceptable but must be placed in conduit if tractor trailer traffic present at site will
compromise HDPE integrity and air flow. Connect piping and hosing or HDPE to wellheads
and equipment enclosures. All fittings, tape, glue, etc. necessary to do so should be
provided.

• Replace trenched areas with black-dyed concrete.

• Provide and install a 20’-power pole and necessary appurtenances such as the meter base
and the main disconnect to provide separate power service to the equipment enclosures,
coordinate connection to the grid with the local power company (Duke Energy), and
coordinate inspection and approval with the local electrical/building inspector.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 3 Troutman, Iredell County, North Carolina

• Connect delivered equipment to power. Provide and install wiring from main disconnect
to control panel.

• Anchor enclosure, equipment, fencing, and roof to surface in accordance with local code.
Provide mounting hardware to do so. Follow any applicable regulations (i.e. tornado,
storm, hurricane requirements). Finalize piping/hose connections to the enclosure.
Provide support bracing and mounts for SVE exhaust from oxidizer that will be 15 feet
tall. Construct through/around roofing as decided in the field with Terraquest. Sweeps
should be provided to neatly surface the conduit and some form of weatherproofing must
be used to seal conduit against precipitation and animal entry.

• Install wood stockade fencing around the outside three sides of the 12’ x 20’ concrete
pad. Back side (northwest) will be made up of existing chain link fence. Fencing should
be outdoor rated, wooden, stockade style fencing. Treated 4 x 4 posts should be placed
as needed to support an overhead, lean-to style roof made of 5V10 galvanized steel roof
panels. Roofing should be supported and anchored with framing and fasteners as
required by code. Roof should cover concrete pad and keep sun off equipment and pad.

General Requirements

The Subcontractor will adhere to the latest North Carolina Building Code and National Electrical
Code.

Utilities at the site have not previously been professionally located or marked for this installation
specifically. Previous locations are shown in the pictures attached at the end of this report along
with a picture showing the layout of the underground product lines. The Subcontractor shall be
responsible for notifying North Carolina One Call (and professional utility locators if desired) and
also for field verification of utility locations prior to and during excavation. Any trenching in the
vicinity of active, underground utilities must be by hand. Subcontractor shall be responsible for
repair of utilities as well as other damages and costs arising from damage to utilities and/or
property.

Power will be provided to the site by Duke Energy. Three-phase 208V power will be provided to
the site. Questions should be directed to Terry Helton, Duke Energy, 336-407-7883
[e-mail].

There are no toilet facilities available at the site. The Subcontractor should provide a portable
toilet during site construction.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 4 Troutman, Iredell County, North Carolina
Trenching, Conduits, and Hoses

The Subcontractor shall dig trenches to connect the equipment shed with the remedial wells in
the pattern shown on Figure 4 and 5. The pipe and hose shown in Figures 4 and 5, along with all
necessary fittings, should be supplied by Subcontractor. As previously noted, HDPE piping may
be substituted but must be inside conduit if it will not hold up to heavy traffic.

Note the following pipe and hose estimated requirements as listed on Figure 4:

PIPE AND HOSE LIST:
235 3/8" diameter 200 psi hose
405 2" diameter PVC
25 4" diameter PVC
80 6" diameter PVC

The actual required amount of hose will be supplied by the Subcontractor. The estimates
provided are rough approximations. All associated fittings, tape, glue, etc. should be provided.

In accordance with Figure 5, the pipe and conduit shall be bed in native material that has been
raked free of rocks. If native material is inappropriate, a clean sand should be provided.

Following drilling of the SVE and air sparge wells, each well will be finished with an 8”-diameter
manholes anchored in concrete (THIS IS HOW IT WILL EXIST WHEN YOU ARRIVE). The manholes,
concrete, etc., will need to be removed and disposed of offsite prior to accessing the wellheads
for connections.

Vacuum piping should be connected to each wellhead with fittings provided by Subcontractor.
Pressure gauges will be provided by the equipment vendor and should be installed by
Subcontractor. SVE wells will be finished with an 18”-diameter manhole similar to an Emco
Wheaton A0721-018 provided by Subcontractor.

Air sparge hoses should be chased through conduit and connected via a 90-degree elbow to the
wellhead so that the hose does not crimp. All hose and fittings should be supplied by
Subcontractor. The wellheads should be packed in sand and then covered and compacted with
native rubble-free material or additional fill and finished off with black-dyed concrete at the
surface. NO VAULTS ARE REQUIRED. Quality control testing should be accomplished prior to
covering the wellheads.

The subcontractor will load any contaminated soil from trenches into an onsite stockpile and
cover appropriately if it is encountered and they are directed to do so by Terraquest. If additional
fill material is required, Subcontractor shall provide a clean fill that is agreeable to compaction.
The final surface should be finished to pre-trench conditions. Any and all concrete, asphalt, seed,
straw, and gravel necessary to do so are the Subcontractor’s responsibility.

7/6/22 Prepared Bid Specification - INSTALLATION Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. 5 Troutman, Iredell County, North Carolina

All piping and hosing and associated connections must be fully sealed. Quality construction is
imperative in this regard. The remediation system will not operate properly if unions are not
properly constructed. Refer to pressure testing sections for detailed instructions on pressure
testing procedures and requirements.

Power Service

A suitable power pole with weather head should be provided and installed near the equipment
compound at a location advised by Terraquest in the field. The pole will include a meter base
and main disconnect. As allowed with the permitting process, once the equipment is in place,
the Subcontractor will provide and install wiring from the main disconnect to the building’s
control panel. All necessary fittings, wire, and other hardware will be provided by the
Subcontractor. Subcontractor will solely be responsible for securing the required permits and
provided the necessary licensed individuals.

Line Tightness Testing

The Subcontractor shall check the tightness of the vacuum piping and air supply hoses/HDPE
through pressure testing. The vacuum piping and air sparge hosing should be capped prior to
testing at each wellhead before the piping/hosing is subsequently connected to each wellhead.
Fittings necessary to do so are the Subcontractors responsibility and will not arrive from the
equipment vendor. While these fittings may be disposable it does not negate their necessity.
While the Subcontractor should test individual portions of the lines before backfilling trench
segments, the individual tests are not a substitute for a total system test which must be
performed. Compressed air should be supplied by the Subcontractor. The test consists of the
application of 20 psi to a piping/hose system that should be maintained with no loss whatsoever
for a period of 15 minutes.

If the test does not pass, then all valves and visible fittings shall be checked for closure/leaks and
the test repeated. Additional failures will require an assessment of the severity of failure and a
subsequent decision by the engineer to accept the system as is or require the leak(s) to be found
and corrected. The engineer reserves the sole right to make this decision based on test results
and system operating requirements.

Final Connections

The Subcontractor will be responsible for final connections of SVE piping and air supply hose (or
HDPE) to the equipment enclosures. The exact connections should be confirmed with the
equipment vendor prior to installation. Most likely, the SVE enclosure will arrive with 2”-
diameter PVC piping protruding from an exterior wall. The air sparge enclosure will have an
external header with 3/8”-diameter hose barb connections. Subcontractor shall securely connect
pipe/hose/HDPE with fittings and clamps they provide.
ONSULTANTS, P.C.CENVIRONMENTAL
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.
1
Ryan Kerins
From:Ryan Kerins
Sent:Wednesday, July 6, 2022 12:23 PM
To:[e-mail]
Subject:RFP Perth Mini Mart
Attachments:MO-9324_40784_CA-INSTALL BID SPEC-20220704.pdf; MO-9324_40784_CA-EQUIP BID
SPEC-20220704.pdf
Good afternoon. Terraquest is soliciting bids for equipment and installation of an environmental treatment
system at the Perth Mini Mart located in Troutman, Iredell County, NC. Please review the attached
documents and provide a bid as soon as you are able to.

Questions can be directed to this email.

Thank you,
Ryan Kerins
Terraquest
1
Ryan Kerins
From:Ryan Kerins
Sent:Wednesday, July 6, 2022 12:42 PM
To:[e-mail]
Subject:RFP Perth Mini Mart
Attachments:MO-9324_40784_CA-INSTALL BID SPEC-20220704.pdf; MO-9324_40784_CA-EQUIP BID
SPEC-20220704.pdf
Good afternoon. Terraquest is soliciting bids for equipment and installation of an environmental treatment
system at the Perth Mini Mart located in Troutman, Iredell County, NC. Please review the attached
documents and provide a bid as soon as you are able to.

Questions can be directed to this email.

Thank you,
Ryan Kerins
Terraquest

1
Ryan Kerins
From:Ryan Kerins
Sent:Wednesday, July 6, 2022 12:32 PM
To:[e-mail]
Subject:RFP Perth Mini Mart
Attachments:MO-9324_40784_CA-EQUIP BID SPEC-20220704.pdf; MO-9324_40784_CA-INSTALL BID
SPEC-20220704.pdf
Good afternoon. Terraquest is soliciting bids for equipment and installation of an environmental treatment
system at the Perth Mini Mart located in Troutman, Iredell County, NC. Please review the attached
documents and provide a bid as soon as you are able to.

Questions can be directed to this email.

Thank you,
Ryan Kerins
Terraquest

1
Ryan Kerins
From:Ryan Kerins
Sent:Wednesday, July 6, 2022 12:36 PM
To:[e-mail]
Subject:RFP Perth Mini Mart
Attachments:MO-9324_40784_CA-EQUIP BID SPEC-20220704.pdf; MO-9324_40784_CA-INSTALL BID
SPEC-20220704.pdf
Good afternoon. Terraquest is soliciting bids for equipment and installation of an environmental treatment
system at the Perth Mini Mart located in Troutman, Iredell County, NC. Please review the attached
documents and provide a bid as soon as you are able to.

Questions can be directed to this email.

Thank you,
Ryan Kerins
Terraquest

1
Ryan Kerins
From:Ryan Kerins
Sent:Wednesday, July 6, 2022 12:31 PM
To:[e-mail]
Subject:RFP Perth Mini Mart
Attachments:MO-9324_40784_CA-EQUIP BID SPEC-20220704.pdf; MO-9324_40784_CA-INSTALL BID
SPEC-20220704.pdf
Good afternoon. Terraquest is soliciting bids for equipment and installation of an environmental treatment
system at the Perth Mini Mart located in Troutman, Iredell County, NC. Please review the attached
documents and provide a bid as soon as you are able to.

Questions can be directed to this email.

Thank you,
Ryan Kerins
Terraquest

1
Ryan Kerins
From:Ryan Kerins
Sent:Wednesday, July 6, 2022 12:20 PM
To:Win Maynard
Subject:RFP Perth Mini Mart
Attachments:MO-9324_40784_CA-EQUIP BID SPEC-20220704.pdf; MO-9324_40784_CA-INSTALL BID
SPEC-20220704.pdf
Good afternoon.  Terraquest is soliciting bids for equipment and installation of an environmental treatment 
system at the Perth Mini Mart located in Troutman, Iredell County, NC.  Please review the attached 
documents and provide a bid as soon as you are able to.   

Questions can be directed to this email.   

Thank you, 
Ryan Kerins 
Terraquest 

August 1,
Mr. Ryan Terraques100 East RMebane, N
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III BID FORM
lnstallation of a Remediation System
Perth Mini Mart
818 Perth Road, Troutman, lredell County, North Carolina
NCDWM-UST lncident No. 40784
Terraquest Environmental Consultants, P.C Proiect No. 08217
The undersigned has carefully examined the Bid Document and fully under:tands it.
7|1ol Lump Sum Price for lnstallation {lncludes NC SalesTax}: S 52 ' 095 ' 00
Company Name:
Company Address:
S&G Remediation Serwices LLC
712 Old Little Rock Road
Charlotte, North Carolina 282L4
Company Phone:
Company Fax:
Signature and Date:
0a4J 7L3-87s5
CHECKLIST (PLEASE INTIAL EACH ITEM}
Each of ttre following has been included or addressed:
8-t-2022
h/-rot BREAKD'*N
'HEEToN
coMpANy LETTERHEAD
!4-"a toLEs rAx HAs BEEN tNctuDED tN THE ABovE BtD PRtcE
Tl6l22Prepared Bid Specification - INSIALLATION Madhukunj, LLC
Soil and Groundwater Remediation System *40784 Perth Mini Mart
By: Terraquest Environmental Consultants, P.C. vii Troutman, lredell County, North Carolina
a Remrdirtion
$errice$ uc
$oil and Gtuundruats Rsmedution
$nlemr std S€rtttoEq
BID SPECIFICATION . INSTALLATION WORK - COST BREAKDOWN FORM
Datei 716122 lncident Name: Perth Mini Mart lncident No.: 40784
JSBTIME , '
Manhours hours S /hour S
Permit time hours S /hour S
JOS.€QUIPMTNT
Equipment MOBE/DEMOBE and all fuel costs
cut saw
backhoe/trackhoe
skid steer
dump truck
other equipment
other equipment
other eouipment
days
_days s
5 s
days
days
days
davs
s dav S
s day S
dav S
s ldav S
Hose, pipe, fittings, expendable plumbing
Trench repair asphalt areas (dyed concrete)
Concrete pad
Electrical pole and connection coordination
s
$
s
s
Daily per diem
Miscellaneous supplies not covered above
Taxes. shiooine and handlins and freicht fees
5
s
s
TOTAL s
ln an ;ffort to exp€dite the bid review, bidders are required to provide a breakdown of the lump zum cost. To make this as easy as possible and to
alleyiate concerns over proprietary costs, this generic breakdown of costs was prepared. Based upon your lump sum cost, please estimate rates,
quantities, and costs as shown above. This is only meant to provide justification for the lump sum price and will not be used for final payment. Final
pavment will be based upon your invoiced amounts up to the bid price unless amount modmcations have been made and approved by Tenaqueqt.
III. BID FORM
Soil and Groundwater Remediation System
Perth Mini Mart
818 Perth Road, Troutman, lredell County, North Carolina
NCDWM-UST lncident No. 40784
Terraquest Environmental Consultants, P.C Project No. 08217
7L2 Al-d Little Rock Road
Charlot,te, North Carolina 282L4
company Phone: (704). 7t3-8756
signature and Date: I ' ii'A
CHECKLTST (PLEASE TNTTAL EACH |TEM)
Each of the following has been included or addressed:
D4 cosr BREAKDoWN SHEET oN coMpANy LETTERHEAD
b& ruc sALEs rAX HAs BEEN TNcLUDED rN THE ABovE BrD pRrcE
8-t-2422
716122 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System $40784 Perth Mini Mart
vi Troutman, lredell County, North Carolina
The undercigned has carefully examined the Bid Document and fully underctands it.P(miti"ry
7.065 Lump Sum Price for Equipment:
(lncludes: Assembly, Delivery and NC Sales Tax)
Company Name:
Company Address:
Company Fax:
S&G Remediation Services LLC
5 L29,500.00
t f! fr Remediation
TD*tt sewices rrc
Soil attd Gmund'ratc{ RsilEdiation
$yalenr snd S€niEB
BID SPECIFICATION . EQUIPMENT - COST BREAKDOWN
lncident Name: Perth Mini Mart lncident No.:40784
SVE equipment enclosure with control panel, heating/cooling mechanisms/equipment. lncludes
Soil vapor extraction system. lncludes regen blower, moisture knockout drum, floats, electrical,
Air sparge system. lncludes enclosed compressor, filters, regulators, meters, gauges, header, and
ln an effort to expedite the bid review, bidders are required to provide a breakdown of the lump sum cost. To make this as
easy as possible and to alleviate concerns over proprietary costs, this generic breakdown of costs was prepared. Based upon
your lump sum cost, please estimate costs as shown above. This is only meant to provide justification for the lump sum price
and will not be used for final payment. Final payment will be based upon your invoiced amounts up to the bid price unless
amount modifications have been made and approved by John Haselow.
Documentation detailing the third pafi certification of the system (entire system including control panel) must be provided. The
third party shall be a nationaFrecognized testing laboratory recognized by the US Department of Labor (see
http://www.osha.eov/dts/otpca/nrtl/l and acceptable to lredell County. Winning bidderrs engineer must sealthe system building
7/6122 Prepared Bid Specification - EQUIPMENT
Soil and Groundwater Remediation System
Madhukunj, LLC
#4078/- Perth MiniMart
Troutman, lredell County, North Carolinavllt

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
vi Troutman, Iredell County, North Carolina
III. BID FORM

Soil and Groundwater Remediation System
Perth Mini Mart
818 Perth Road, Troutman, Iredell County, North Carolina
NCDWM-UST Incident No. 40784
Terraquest Environmental Consultants, P.C Project No. 08217

The undersigned has carefully examined the Bid Document and fully understands it.___(initial)

7.065 Lump Sum Price for Equipment: $____________________
(Includes: Assembly, Delivery, and NC Sales Tax)

Company Name: _________________________________________________________

Company Address: _________________________________________________________

_________________________________________________________

Company Phone: _________________________________________________________

Company Fax: _________________________________________________________

Signature and Date: ___________________________________ ___________________

CHECKLIST (PLEASE INTIAL EACH ITEM)
Each of the following has been included or addressed:

______COST BREAKDOWN SHEET ON COMPANY LETTERHEAD

______NC SALES TAX HAS BEEN INCLUDED IN THE ABOVE BID PRICE

7/6/22 Prepared Bid Specification - EQUIPMENT Madhukunj, LLC
Soil and Groundwater Remediation System #40784 Perth Mini Mart
viii Troutman, Iredell County, North Carolina
BID SPECIFICATION - EQUIPMENT - COST BREAKDOWN
Date: 6/14/22 Incident Name: Perth Mini Mart Incident No.: 40784
ITEM DESCRIPTION COST
SVE equipment enclosure with control panel, heating/cooling mechanisms/equipment. Includes
third party certification, labor to assemble prior to delivery. $_____________________
Soil vapor extraction system. Includes regen blower, moisture knockout drum, floats, electrical,
plumbing, header, pressure gauges, meters, and assembly labor. $_____________________
Air sparge system. Includes enclosed compressor, filters, regulators, meters, gauges, header, and
assembly labor. $_____________________
Electric vapor oxidizer and appurtenances $_____________________
Miscellaneous supplies not covered above. $_____________________
Taxes, shipping-handling and freight fees for parts, and system delivery. $_____________________
TOTAL SYSTEM COST $_____________________
In an effort to expedite the bid review, bidders are required to provide a breakdown of the lump sum cost. To make this as
easy as possible and to alleviate concerns over proprietary costs, this generic breakdown of costs was prepared. Based upon
your lump sum cost, please estimate costs as shown above. This is only meant to provide justification for the lump sum price
and will not be used for final payment. Final payment will be based upon your invoiced amounts up to the bid price unless
amount modifications have been made and approved by John Haselow.

Documentation detailing the third party certification of the system (entire system including control panel) must be provided. The
third party shall be a national-recognized testing laboratory recognized by the US Department of Labor (see
http://www.osha.gov/dts/otpca/nrtl/) and acceptable to Iredell County. Winning bidder’s engineer must seal the system building
drawings in order to comply with all local building codes including any Appendix B building code forms.
Product Recovery Management, Inc.
200 20th Street
Butner, NC 27509, United States
Ph:919-957-8890 Fax. [phone]
www.prmfiltration.com
Product Recovery Management, Inc.
200 20th Street
Butner, NC 27509, United States
Ph:919-957-8890 Fax. [phone]
www.prmfiltration.com
BID SPECIFICATION - INSTALLATION WORK - COST BREAKDOWN FORM
Date: 7/6/22 Incident Name: Perth Mini Mart Incident No.: 40784
ITEM DESCRIPTION RATE COST
JOB TIME
Manhours 456 hours $75.00 /hour $34,200.00
Permit time 8 hours $90.00 /hour $720.00
JOB EQUIPMENT
Equipment MOBE/DEMOBE and all fuel costs $4920.00
cut saw 5 days $162.92 /day $849.58
backhoe/trackhoe 1 Month $5000.00 /Month $5000.00
skid steer 1 _Month 4000.00 /Month $ 4000.00
dump truck 1 Month $ 1500.00 /Month $1500.00
other equipment 1 Month $1500.00 /Month $1500.00
JOB MATERIALS
Hose, pipe, fittings, expendable plumbing $6959.71
Trench repair asphalt areas (dyed concrete) $3150.00
Concrete pad $2849.00
Electrical pole and connection coordination $ 2730.40
Daily per diem $7560.00
Miscellaneous supplies not covered above $ 4587.86
Taxes, shipping and handling and freight fees $5435.54
TOTAL $85962.10
Product Recovery Management, Inc.
200 20th Street
Butner, NC 27509, United States
Ph:919-957-8890 Fax. [phone]
www.prmfiltration.com
PRM’s Assumptions and Exceptions
○ Asphalt / concrete to be removed is estimated at 5” thick. Overages on average will
justify a change order approval.
○ It is anticipated that this site will be free of large rock and obstructions under the ground
surface. If rock or obstructions are encountered while excavated and cannot be easily
removed utilizing onsite equipment in a reasonable amount of time, PRM will provide a
change order in order to do so.
○ PRM will avoid all marked public and private utility lines and hand dig around lines
through the trenching zone. However if utilities are found and damaged that were not
located PRM is not responsible for damage or repair
○ PRM takes exception to the 20 calendar days for completion and requests that the
contract state 20 business days
○ PRM takes exception to the 1% reduction for work not completed within the 20 day time
period.

APPENDIX D

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

Iredell County Health Director
Jane Hinson
PO Box 788
Statesville, NC 28687 CERTIFIED MAIL ARTICLE NO.: 7021 0350 0000 1753 5902

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

Iredell County Manager
Beth Jones
P.O. Box 788
Statesville, NC 28687
CERTIFIED MAIL ARTICLE NO.: 7021 0950 0001 0474 9094

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

Gary & Sherry Pennell
PO Box 712
Troutman, NC 28166
CERTIFIED MAIL ARTICLE NO.: 7021 0950 0001 0474 9100

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

Lee & Katie Geiger
782 Perth Rd.
Troutman, NC 28166
CERTIFIED MAIL ARTICLE NO.: 7021 0950 0001 0474 8943

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

Steve & Michael Tsitouris
569 autumn Leaf Rd.
Troutman, NC 28166
CERTIFIED MAIL ARTICLE NO.: 7021 0950 0001 0474 8936

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

TCJ Development, LLC
PO Box 3395
Mooresville, NC 28117
CERTIFIED MAIL ARTICLE NO.: 7021 0950 0001 0474 8950

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures

100 East Ruffin Street, Mebane, North Carolina 27302
Telephone [phone] ·Facsimile [phone]
www.terraquestpc.com

August 24, 2022

Wayne Thompson
PO Box 886
Troutman, NC 28166
CERTIFIED MAIL ARTICLE NO.: 7021 0950 0001 0474 8967

Re: Public Notice
Perth Mini Mart
818 Perth Road
Troutman, Iredell County, North Carolina
NCDMW-UST Incident No. 40784
Terraquest Project No. 08217

To Whom It May Concern:

Pursuant to 15A NCAC 2L .0407 (which references 15A NCAC 2L .0114 via 15A NCAC 2L .0106),
responsible parties of High and Intermediate risk releases must provide a summary of the
Corrective Action Design Report to the local Health Director, the chief administration officer of
the political jurisdiction in which the contamination occurs, and the surrounding property
owners. On behalf of the responsible party, Terraquest Environmental Consultants, P.C. hereby
submits the enclosed executive summary and pertinent figures from the report for the petroleum
release incident at the Perth Mini Mart facility located in Troutman, Iredell County, NC.

If you have any questions regarding the report, please contact us at [phone]. Questions
may also be directed to the NCDWM UST Regional Supervisor, Ron Taraban at 704-235-2167.
Thank you.

Sincerely,

Terraquest Environmental Consultants, P.C.

Ryan D. Kerins
Project Manager

Enclosures
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ENVIRONMENTAL CONSULTANTS, P.C.
SOIL ANALYTICAL RESULTS MAP (CSA)
MADHUKUNJ, LLC
PERTH MINI MART818 PERTH ROAD
TROUTMAN, IREDELL COUNTY, NC
PROJECT NO: 08217
SCALE:1" = 30'
CHECKED BY: JRG/MJB
DRAWN BY:JTL/RDK
TROUTMAN, NC
FIGURE NO.5
DATE:6/18/19
ENVIRONMENTAL CONSULTANTS, P.C.
ENVIRONMENTAL CONSULTANTS, P.C.