MO-28858_48068_CA_O_20230705_FS

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
www.excelengr.com
Excel Civil & Environmental Associates, PLLC
625 Huntsman Court
Gastonia, North Carolina 28054
NC License No. P-0129
Telephone: [phone]
Facsimile: [phone]
Internet: www.excelengr.com

July 5, 2023

Mr. Dan Bowser
NCDEQ / DWM / UST Section Mooresville Regional Office 610 East Center Ave, Suite 301
Mooresville, North Carolina 28115
Re: Feasibility Study Sam’s Mart 74 9810 University City Boulevard
Charlotte, North Carolina
Land Use: COMMERCIAL
MO-28858_48068_CA_20230705_Feasibility Study EXCEL Project No. 2021126

Dear Mr. Bowser:
On behalf of Sam’s Mart LLC, Incorporated, Excel Civil & Environmental Associates, PLLC (Excel) respectfully submits for your review and approval this Feasibility Study for the above-referenced facility.

If you have any questions, please contact the undersigned.
Sincerely yours,
EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
Aaron C. Long, P.E.
Principal Engineer

p.c. Adnan Jazairi / Sam’s Mart, Inc. / Matthews, NC

FEASIBILITY STUDY

SAM’S MART 74
9810 UNIVERSITY CITY BOULEVARD
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA
NCDEQ INCIDENT NO. 48068
MO-28858_48068_CA_20230705_FEASIBILITY STUDY

NCDEQ FACILITY ID NO. 00-0-0000035588 EXCEL PROJECT NO. 2021126

LATITUDE = 35.308160 / LONGITUDE = (-) 80.719680

Date Submitted
July 5, 2023

Prepared for
Mr. Adnan Jazairi
Chief Operating Officer Sam’s Mart, Inc. 7935 Council Place, Suite 200
Matthews, North Carolina 28105

Prepared by
Excel Civil & Environmental Associates, PLLC 625 Huntsman Court Gastonia, North Carolina 28054
NC License No. P-0129

www.excelengr.com
Aaron C. Long, P.E.
Principal Engineer
Feasibility Study NCDEQ No. 00-0-0000035588
Sam’s Mart 74 Excel No. 2021126
Charlotte, North Carolina Page No. i

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
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TABLE OF CONTENTS

SECTION NO. PAGE NO.
TABLE OF CONTENTS ……………………………………………………………………………………. i

1.0 EXECUTIVE SUMMARY ……………………………………………………………………………. 1

2.0 BACKGROUND INFORMATION.……………………………………………………………………. 1
2.1 AREA OF INVESTIGATION.………………………………………………………………….. 1
2.2 RECEPTOR SURVEY.……………………………………………………………………….. 2
2.3 PREVIOUS INVESTIGATIONS.………………………………………………………………. 3

3.0 GEOLOGIC FRAMEWORK.………………………………………………………………………… 4
3.1 REGIONAL GEOLOGY.……………………………………………………………………… 4
3.2 SITE GEOLOGY.…………………………………………………………………………….. 4

4.0 HYDROGEOLOGICAL INVESTIGATION……………………………………………………………. 4

5.0 FIELD ACTIVITIES.…………………………………………………………………………………. 5

6.0 Proposed Corrective Action ………………………………………………………………... 5
6.1 AST Environmental…..…………………………………………………………………..….. 5
6.2 Evonik …………....…………………………………………………………………………… 6
6.3 Tersus Environmental.....…………………………………………………………………….6

7.0 LIMITATIONS……………………………………………………………………………………….. 7

8.0 REFERENCES…………………………………………………………………………………….... 8

LIST OF TABLES
TABLE 1 – LIQUID LEVEL DATA
TABLE 2 – SOIL SUMMARY DATA
TABLE 3 – GROUNDWATER SUMMARY DATA
TABLE 4 – GROUNDWATER PARAMETERS SUMMARY

LIST OF FIGURES
FIGURE 1 – SITE VICINITY MAP
FIGURE 2 – SITE PLAN
FIGURE 3 – GROUNDWATER CONTOUR MAP
FIGURE 4 – SOIL CONSTITUENTS MAP
FIGURE 5 – GROUNDWATER CONSTITUENTS MAP
FIGURE 6 – BENZENE GW CONSTITUENTS MAP
FIGURE 7 – TBA GW CONSTITUENTS MAP
FIGURE 8 – PROPOSED INJECTION WELL LOCATIONS MAP

LIST OF APPENDICES
APPENDIX A – PHYSICAL CHARACTERISTICS OF THE COCS
APPENDIX B – BIOREMEDIATION PROPOSALS
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1.0 EXECUTIVE SUMMARY

The property is occupied by Sam’s Mart #74, an inactive convenience store and former gasoline
station. The property consists of a one-story structure on the western side of the property and
associated parking and concrete areas with grass and vegetation on the eastern side of the
property. Based on the NCDEQ Registered Tank Database, three USTs including one 15,000-
gallon gasoline UST, one 12,000-gallon gasoline UST, and one 12,000-gallon diesel UST are
located on the property. The database indicates that the USTs were installed in November
1997 and are temporarily closed. The associated gasoline and diesel dispensers have been
removed from the property.

The subject property is located on the southern side of University City Boulevard and is
bounded by Old Concord Road to the south, located inside the incorporated city limits of
Charlotte, North Carolina (refer to Figure 1). The subject property consists of one approximately
triangularly parcel of land with an area of approximately 1.101-acres. The property is currently
an inactive gas station and convenience store. The City of Charlotte has designated this
property as zoned B-1 General Business. University City Boulevard bounds the property to the
north and tracks in an approximate east-west direction and Old Concord Road bounds the
property to the south and tracks in an approximate east-west direction. The surrounding
properties consist of commercial and residential properties with a railroad line to the south and
residential development beyond.

During a Phase II assessment, on May 10 & 11, 2021, H&H submitted a total of seventeen soil
samples from borings SB-1 through SB-17 for laboratory analysis. Concentrations of TPH DRO
(ranging from 0.23 mg/kg to 485 mg/kg) and/or TPH GRO (ranging from 113 mg/kg to 1,366
mg/kg) were detected in soil samples collected from borings SB-1 through SB-3, SB-5, SB-6,
SB-10 and SB-15. The DRO and GRO concentrations exceed the NC DEQ Action Levels of
100 mg/kg and 50 mg/kg, respectively, in soil samples SB-3 (5-7 ft) and SB-5 (5-7 ft). The
GRO concentrations detected in soil samples SB-1 (5-7 ft) and SB-2 (7-9 ft) also exceed the NC
DEQ Action level.

Upon completion of soil sampling activities soil borings SB-1, SB-8, SB-14, and SB-15 were
converted into temporary monitoring wells TMW-1, TMW-2, TMW-3, and TMW-4, respectively.
Concentrations of target petroleum VOCs and PAHs were detected in the groundwater samples
collected from wells TMW-1 through TMW-4 above their respective 2L Standards.
Concentrations of benzene ranging from 38.5 ug/l to 18,300 ug/L detected in each monitoring
well were compared to the 2L Standard of 1 mg/L. Concentrations of benzene (18,300 ug/L) and
methyl tert-butyl ether (MTBE) (319,000 ug/L) detected in TMW-1 (refer to Figure 2).

2.0 BACKGROUND INFORMATION

During Limited Site Assessment activities conducted by Excel in December of 2021, soil and
groundwater samples collected were found to contain benzene exceeding Soil-to-Water MSCCs
and various constituents exceeding the NCAC 2L Standards, respectively. In addition, the
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groundwater sample collected from MW-1 was found to exceed the NCDEQ Gross
Contamination Levels (GCLs) for benzene.

During Risk Assessment activities conducted by Excel in July and August 2022, groundwater
quality samples collected from monitoring well MW-1 indicated concentrations of benzene and
MTBE exceeding the Gross Contamination Levels (GCLs). The laboratory results for the
groundwater quality sample collected from monitoring well MW-3 indicated concentrations of
MTBE and Tert-Butyl alcohol exceeding the Gross Contamination Levels (GCLs) (refer to Table
3 and Figure 4).

Following completion of an access agreement with the NCDOT, Excel mobilized a track
mounted drill rig to the site on January 30, 2023, for the installation of one two-inch diameter
Type II monitoring well (MW-5) to complete delineation to Gross Contamination Levels (GCLs).
Laboratory analytical data collected from MW-5 indicated all analytical data below the applicable
GCLs. Excel recommended the completion of a Corrective Action Feasibility Study for the site to
evaluate an in-situ injection in the vicinity of MW-1 and MW-3.
Based on previous reports and agency correspondence, the site is classified as “Intermediate” risk by the NCDEQ due to the levels of groundwater contamination exceeding Gross
Contamination Levels (GCLs). The goal of corrective action at the property is to reduce constituent levels at the property to below the Gross Contamination Levels (GCLs). Excel proposes reducing the benzene, TBA and historical MTBE concentrations in the vicinity of MW-
1 and MW-3 below GCLs by means of an in-situ chemical oxidation and bioremediation injection.

2.1 AREA OF INVESTIGATION

The subject site is located in the Piedmont Physiographic Province. Rocks are, for the
most part, metamorphosed and deeply weathered. The 1985 USGS Geologic Map of
North Carolina indicates underlying formations in this area as the Charlotte and Milton
Belts of the Piedmont Physiographic Province consisting of a biotite gneiss and schists.
The majority of the site is covered by impervious surfaces such as asphalt and concrete.
The general topography of the site is developed to slope to the north with site-specific
surface drainage expected to towards University City Boulevard.

2.2 RECEPTOR SURVEY

As part of the Limited Site Assessment, Excel conducted a receptor survey by vehicular
reconnaissance, a Request for Water Supply Information Questionnaires and a review
of the Mecklenburg County website.

As a result of the survey, Excel did not identify any active potable wells within 1,500 feet
of the subject property. The site is not located in a designated wellhead protection area.
According to the USGS Topographical Map for this area and vehicle reconnaissance,
the nearest surface water body, an unnamed tributary of Mallard Creek, is located
approximately 700 feet to the northwest of the subject property.
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2.3 PREVIOUS INVESTIGATIONS

During a Phase II assessment, on May 10 & 11, 2021, H&H submitted a total of
seventeen soil samples from borings SB-1 through SB-17 for laboratory analysis.
Concentrations of TPH DRO (ranging from 0.23 mg/kg to 485 mg/kg) and/or TPH GRO
(ranging from 113 mg/kg to 1,366 mg/kg) were detected in soil samples collected from
borings SB-1 through SB-3, SB-5, SB-6, SB-10 and SB-15. The DRO and GRO
concentrations exceed the NC DEQ Action Levels of 100 mg/kg and 50 mg/kg,
respectively, in soil samples SB-3 (5-7 ft) and SB-5 (5-7 ft). The GRO concentrations
detected in soil samples SB-1 (5-7 ft) and SB-2 (7-9 ft) also exceed the NC DEQ Action
level.

Upon completion of soil sampling activities soil borings SB-1, SB-8, SB-14, and SB-15
were converted into temporary monitoring wells TMW-1, TMW-2, TMW-3, and TMW-4,
respectively. Concentrations of target petroleum VOCs and PAHs were detected in the
groundwater samples collected from wells TMW-1 through TMW-4 above their
respective 2L Standards. Concentrations of benzene ranging from 38.5 ug/l to 18,300
ug/L detected in each monitoring well were compared to the 2L Standard of 1 mg/L.
Concentrations of benzene (18,300 ug/L) and methyl tert-butyl ether (MTBE) (319,000
ug/L) detected in TMW-1(refer to Figure 2).

During Limited Site Assessment activities conducted by Excel in December of 2021, soil
and groundwater samples collected were found to contain benzene exceeding Soil-to-
Water MSCCs and various constituents exceeding the NCAC 2L Standards,
respectively. In addition, the groundwater sample collected from MW-1 was found the
exceed the NCDEQ Gross Contamination Levels (GCLs) for benzene.

During Risk Assessment activities conducted by Excel in July and August 2022,
groundwater quality samples collected from monitoring well MW-1 indicated
concentrations of benzene and MTBE exceeding the Gross Contamination Levels
(GCLs). The laboratory results for the groundwater quality sample collected from
monitoring well MW-3 indicated concentrations of MTBE and Tert-Butyl alcohol
exceeding the Gross Contamination Levels (GCLs) (refer to Table 3 and Figure 4).

Following completion of an access agreement with the NCDOT, Excel mobilized a track
mounted drill rig to the site on January 30, 2023, for the installation of one two-inch
diameter Type II monitoring well (MW-5) to complete delineation to Gross Contamination
Levels (GCLs). Laboratory analytical data collected from MW-5 indicated all analytical
data below the applicable GCLs. Excel recommended the completion of a Corrective
Action Feasibility Study for the site to evaluate an in-situ injection in the vicinity of MW-1
and MW-3.

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3.0 GEOLOGIC FRAMEWORK

3.1 REGIONAL GEOLOGY
The subject site is located in the Piedmont Physiographic Province. Rocks are, for the
most part, metamorphosed and deeply weathered. The 1985 USGS Geologic Map of North Carolina indicates underlying formations in this area of the Piedmont Physiographic Province consisting of a biotite gneiss and schists.

3.2 SITE GEOLOGY

During site assessment activities, a tan silty clay was observed from twelve inches below
the ground surface to a depth of approximately eighteen feet below ground surface
(fbgs) and a tan weathered rock was observed from eighteen feet below ground surface
to a depth of approximately thirty-three feet with rock observed from thirty three to the
termination depth of approximately thirty five-fbgl.

The type of soils observed at the drilling location appear to be consistent with the
surficial sediments common for this area. During groundwater sampling activities
conducted on July and August, 2022, groundwater was measured to be range from an
approximate depth of twelve to fourteen feet as shown on Figure 2.

4.0 HYDROGEOLOGICAL INVESTIGATION

One rising-head slug test was performed at the site (MW-2) to estimate the aquifer properties at
the site. The tests were conducted by submersing a PVC bailer in the water column, allowing
the water level to return to equilibrium, removing the filled bailer (known volume), and
measuring the water level as it returns to the equilibrium point. The water level changes were
measured as a function of time using an electronic water-level meter.

Subsequently, the data from the tests was analyzed using AQTESOLV (Hydrosolve, 1998) by
the Bouwer and Rice Slug Test Method (1976). The average value of hydraulic conductivity (K)
estimated by this program was 0.03852 ft/day (MW-2). The data tables and the response curves
area are included in Appendix C. Using the formula T = KY, where Y is the difference between
the water table and the impermeable bottom. Based on the well construction logs and the depth
to rock, the saturated thickness Y was assumed to be 10 feet and T was estimated to be 0.3852
ft2/day.

Assuming an effective porosity (n) of 0.40 (for silty sand), the rate of ground water movement
was computed using the following equation: V=K dh
n dl Where, V = velocity (ft/day)
K = hydraulic conductivity (0.03852 ft/day)
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n = effective porosity [assumed to be 0.4, (40)%)] dh = hydraulic gradient (approximately 0.0064 ft/ft) (MW-2 to MW-3)
dl
Using the above equation, the groundwater flow across the contaminated area is estimated to
be approximately 0.000616 ft/day or 0.225 ft/year. As such, the lateral migration of dissolved
petroleum contaminants appear to be impeded by the local geological/hydrogeological
conditions.

5.0 FIELD ACTIVITIES

On June 5, 2023, Excel obtained groundwater samples from monitoring wells MW-1 through
MW-5 and VW-1. Laboratory analytical data indicated that overall dissolved phase hydrocarbon
constituents continue to occur at the site. During the sampling event, no free product was observed in any of the monitoring wells sampled. It is Excel’s standard operating procedure not to gauge monitoring wells with an oil-water interface probe prior to sampling if said well has not historically shown free product. During the sampling event, static water levels were collected with an electric water level indicator. The depth of water measured in MW-1 and MW-3 were measured to be eight feet below grade surface at during the June 2023 sampling event.
The results of the laboratory analysis indicated that the ground water quality sample collected
from monitoring well MW-1 was found to exceed Gross Contamination Levels (GCLs) for
benzene. The ground water quality sample collected from monitoring well MW-3 was found to
exceed Gross Contamination Levels (GCLs) for Tert-Butyl Alcohol (TBA). Historically, both MW-
1 and MW-3 have exceeded NCDEQ GCLs for MTBE.
6.0 PROPOSED CORRECTIVE ACTION
Based on previous reports and agency correspondence, the site is classified as “Intermediate” risk by the NCDEQ due to the levels of groundwater contamination exceeding Gross Contamination Levels (GCLs). Additionally, the land use classification is classified as “Commercial”. The goal of corrective action at the property is to reduce constituent levels at the property to below the Gross Contamination Levels (GCLs).
In order to reduce the constituent of concern levels at the location of monitoring well MW-1 and MW-3 and to outline a feasible alternative for remediation of groundwater impacted by
petroleum hydrocarbon compounds at the site, Excel contacted three companies in order to obtain an alternate strategy utilizing bioremediation for the site. Excel provided information to each company regarding site hydrology and geology and acquired three proposed remediation
strategies. The remediation strategies for each company are summarized below:
6.1 AST Environmental Inc.
After reviewing the historical site information, AST Environmental proposes the
installation of 8 locations that will be sampled via dual tube geoprobe tooling to an approximate termination depth of 25’ bgs (or refusal). Soil samples will be collected every 1’-2’ vertically and sent to the RPI lab in Golden, CO for analysis via method 8260.
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There is no charge for the laboratory analysis. Once the data is received, AST will revise the injection plan to reflect the total mass observed and at targeted vertical
intervals identified during the drilling. Once this is accomplished, they recommend utilizing 29,550 pounds of BOS 200 for a total of 40,230 gallons into the formation.
6.2 Evonik Evonik recommended three different applications for potential use on the property. Excel believes injection wells will be necessary due to the tight nature of the formation. Therefore, only one option will be discussed below. Evonik recommends utilizing Klozur SP and sodium hydroxide. Peroxy recommends a total of 17 injection locations spaced at approximately 16 feet on center for a total proposed injection 23,528 pounds of Klozur SP for a total volume of 81,000 gallons at a 3.4% target concentration by weight.
6.3 Tersus Environmental

Tersus Environmental proposes an in-situ chemical oxidation bioremediation via injection wells to address the contamination at the site. They assumed two plumes with a total area of 10,800 square feet. They recommended utilizing 8,250 pounds of
Nutrisulfate® Liquid. Nutrisulfate® stimulates biodegradation by providing a soluble, readily available electron acceptor solution. In the presence of elevated sulfate, anaerobic groundwater bacteria use BTEX, MTBE and other petroleum hydrocarbons for
carbon and energy while mineralizing the hydrocarbons to carbon dioxide and water. Sulfate addition enhances natural conditions and reduces the carbon footprint when compared to conventional remediation. Tersus approach is the most economical between the three proposals. Excel recommends utilizing this approach utilizing seven injection wells to a total depth of 20 fbgl. The total depth of each injection well should be 20 feet with 15 feet of slotted well screen and 5 feet of well casing. Refer to the attached Figure 4 for proposed injection well location. Excel also recommends a
pilot injection point be completed for each proposal to evaluate the viability of each method. To view each proposal in its entirety and the related cost of each, refer to Appendix B.

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7.0 LIMITATIONS

This report is based on a limited number of soil and groundwater samples and chemical
analyses. The conclusions presented in this report are based only on the observations made
during this investigation and data provided by others. Subsurface conditions may vary
significantly with time, particularly with respect to groundwater elevations and quality.
Conclusions and recommendations set forth herein are applicable only to the facts and
conditions described at the time of this report.

In performing its professional services, Excel uses that degree of care and skill exercised under
similar circumstances by members of the environmental profession practicing in the same or
similar locality under similar conditions. The standard of care shall be judged exclusively as of
the time these services are rendered and not according to later standards. Excel makes no
express or implied warranty beyond its conformance to this standard. Excel shall not be
responsible for conditions or consequences arising from relevant facts that were concealed,
withheld or not fully disclosed for this report. Excel believes that all information contained in this
report is factual, but no guarantee is made or implied.

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8.0 REFERENCES

Driscoll, “Groundwater and Wells”, 2nd edition, (St. Paul, Minnesota, Johnson Division).

R. Perry and C. Chilton, “Chemical Engineer's Handbook”, 5th edition, (New York: McGraw Hill,
Inc. 1973).

“Guidelines for Assessment and Corrective Action for UST Releases” completed by the UST
Section of the NCDEQ, Division of Waste Management dated December 1, 2013 and any
applicable amendments.

“Limited Site Assessment”, Sam’s Mart 74, completed by ECEA, dated February 11, 2022.

“Phase II Investigation” Parcel 25, completed by Hart & Hickman, dated July 29, 2021.

“Risk Assessment Report”, Sam’s Mart 74, completed by ECEA, dated September 12, 2022.

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PROJECT INFORMATION
Facility Name: Sam’s Mart No. 74
Facility Address: 9810 University City Boulevard Charlotte, North Carolina
NCDEQ UST Number: 00-0-0000035588
NCDEQ Incident Manger: Daniel Bowser, MRO, UST Section
Site Risk / Priority Rank: Intermediate
Reason for Risk Classification: Groundwater constituents exceeding GCLs; no wells
reported in receptor area
Land Use Category: Commercial
CONTACT INFORMATION
Responsible Party: Sam’s Mart, Inc. 7935 Council Place, #200 Matthews, North Carolina 28105
Phone: [phone]
Current Property Owner: SAM'S INVESTMENTS III LLC 7935 Council Place, #200 Matthews, North Carolina 28105
Consultant: Excel Civil & Environmental Associates, PLLC 625 Huntsman Court Gastonia, North Carolina 28054
License No. P-0129
Consultant Contact: Aaron C. Long, P.E.
Principal Engineer
Phone: [phone] Email: [e-mail]
Analytical Laboratory: Pace National
12065 Lebanon Road Mt. Juliet, TN 37122 Phone: [phone]
Certification No. ENV375/DW21704/BIO041
RELEASE INFORMATION
Date Discovered: May 2021
Estimated Quantity of Release: Unknown
Source of Release: Dispensers and/or UST Product Lines
UST(s) Size & Contents: (1) 15,000-gallon gasoline UST, (1) 12,000-gallon gasoline UST, and (1) 12,000-gallon diesel UST

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LIST OF TABLES

TABLE 1 – LIQUID LEVEL DATA

TABLE 2A – SOIL SUMMARY DATA (LSA)

TABLE 2B – SOIL SUMMARY DATA (RAR)

TABLE 3 – GROUNDWATER SUMMARY DATA

TABLE 4 – GROUNDWATER PARAMETERS SUMMARY

Table 1 - Liquid Level DataSam's Mart 749810 University City Boulevard, Charlotte, North CarolinaNCDEQ Incident 48068Excel Project No. 2021126WELL NUMBERDATE INSTALLEDWELL DEPTH (ft)SCREEN INTERVAL (ft)TOC (ft)DATE MEASUREDDTW (ft) WTE (ft)MW-130-Nov-21 15 5-15 100.00 8.35 91.65MW-230-Jun-22 19 9-19 102.38 10.15 92.23MW-325-Jul-22 24 14-24 99.74 8.35 91.39MW-45-Aug-22 22 12-22 99.83 9.02 90.81MW-530-Jan-23 22 17-22 97.53 6.68 90.85VW-130-Jun-22 35 30-35 99.93 5.33 --NOTES:Data provided in feet unless otherwise notedDTW - Depth to WaterWTE - Water Table Elevation TOC elevation for MW-1 set to datum of 100'5-Jun-23
Table 2A - Soil Summary Data - LSASam's Mart 749810 University City Boulevard, Charlotte, North CarolinaNCDEQ Incident 48068Excel Project No. 20211265 ft10 ftDATE SAMPLEDPID READING7921,957------EPH C9 - C18 Aliphatics< 2.61 3.14 J -- -- --EPH C19 - C36 Aliphatics2.74 B J 2.83 B J -- 31,000810,000EPH C11 - C22 Aromatics3.2 B J 2.97 B J -- -- --VPH C5 - C8 Aliphatics3.52 J 6.19 B J68 93924,528VPH C9 - C12 Aliphatics< 2.36 < 3.09 -- -- --VPH C9 - C10 Aromatics2.78 J 4.55 J -- -- --TOTAL C9 - C18 AliphaticsBDL 3.14 J540 1,50040,000TOTAL C9 - C22 Aromatics5.98 J 7.52 J31 46912,264BENZENE0.00569 J0.0013 J0.005618164TOLUENE< 0.0147 < 0.002424.31,20032,000ETHYLBENZENE0.00841 J 0.00274 J4.91,56040,000XYLENES0.0394 J 0.01444.63,12981,760MTBE< 0.00396 0.0510.0913503,100NAPHTHALENE< 0.0551 0.0145 J0.163138,176ISOPROPYLBENZENE0.01 B J 0.00218 B J1.71,56440,880n-PROPYLBENZENE0.0117 J 0.00576 J1.762616,3501,2,4-TRIMETHYLBENZENE0.0931 0.03988.578220,4401,3,5-TRIMETHYLBENZENE0.028 J 0.01428.578220,440NAPHTHALENE< 0.0101 < 0.01060.163138,176PYRENE< 0.0079 < 0.0081927046912,2642-METHYLNAPHTHALENE0.00641 J < 0.005463.6631,635NOTES:Data in mg/kgMADEP - Massachussetts Dept. of Environmental ProtectionFBGL - Feet Below Grade LevelEPH - Extractable Petroleum HydrocarbonsVOC - Volatile Organic CompoundVPH - Volatile Petroleum HydrocarbonsSVOC - Semi-Volatile Organic CompoundBold data represents constituents above Soil-to-Water MSCCs (Maximum Soil Contaminant Concentrations)Highlighted data represent constituents above Residential Soil Cleanup Levels Italicized data represent constituents above Industrial / Commercial Soil Cleanup LevelsJ - Reported value is an estimateB - The same analyte was found in the associated blankResidential Soil Cleanup LevelsIndustrial / Commercial Soil Cleanup Levels30-Nov-21SVOCsMADEPVOCsSAMPLE LOCATIONSoil-to-Water MSCCsMW-1
5 ft10 ft5 ft10 ft5 ft10 ft5 ft10 ft5 ft10 ftDATE SAMPLEDPID READING456.0 1,8900.00.00.00.30.00.01,211 1,418--TPH GRO2.24 B J816 Q< 0.854 < 0.788 < 0.821 < 0.952 < 0.746 < 0.773 4.8629350TPH DRO< 0.873104< 0.983 < 0.932 < 0.960 < 1.04 < 0.9 < 0.927 < 8.815.6100NOTES:Data in mg/kgBold data represents constituents above NCDEQ Action LevelsFBGL - Feet Below Grade LevelB- Same analyte is found in associated blankTPH - Total Petroleum HydrocarbonsJ- ID of analyte is acceptable, reported value is estimateGRO - Gasoline Range OrganicsQ - Sample analyzed past holding timeDRO - Diesel Range OrganicsSAMPLE LOCATIONNCDEQ Action LevelsTable 2B - Soil Summary Data - TPH GRO & DRO9810 University City Boulevard, Charlotte, North CarolinaNCDEQ Incident 48068 Excel Project 2021126Sam's Mart 7428-Jun-2230-Jun-225-Aug-22VW-1MW-2MW-3MW-4MW-530-Jan-23
Table 3 - Groundwater Summary DataSam's Mart 749810 University City Boulevard, Charlotte, North Carolina NCDEQ Incident 48068 Excel Project No. 2021126SAMPLE LOCATIONDATE SAMPLED 2-Dec-21 9-Aug-22 5-Jun-23 9-Aug-22 5-Jun-23 9-Aug-22 5-Jun-23EPH C9 - C18 Aliphatics58.7 J < 33.3 NA < 33.3NA< 33.3NA -- --EPH C19 - C36 Aliphatics110 B J 86.8 J NA < 33.3 NA < 33.3NA10,000 --EPH C11 - C22 Aromatics611 406 NA < 33.3 NA 34.5 JNA -- --VPH C5 - C8 Aliphatics44,600 46,400NA < 33.3NA15,500NA400 --VPH C9 - C12 Aliphatics35,300 21,500 NA < 33.3 NA < 833NA -- --VPH C9 - C10 Aromatics6,920 6,800 NA < 33.3NA< 833NA -- --TOTAL C9 - C18 Aliphatics35,358.7 21,500NA BDL NA BDL NA700 --TOTAL C9 - C22 Aromatics7,531 7,206NA BDL NA 34.5 J NA200 --BENZENE 10,300 12,700 10,900< 0.0941 < 0.094113.6 J < 47.1 1 5,000TOLUENE 8,330 5,400 6,080< 0.278 < 0.278 < 6.95 < 139600 260,000ETHYLBENZENE 3,870 3,050 2,550< 0.137 < 0.137 < 3.43 < 68.5600 84,500TOTAL XYLENES 13,670 11,900 10,880< 0.604 < 0.604 < 15.05 < 302500 85,500MTBE 14,500 23,300 15,3000.332 J < 0.10130,200 7,010 20 20,000NAPHTHALENE 525 512 J 263 J< 1< 1< 25< 500 6 6,000N-PROPYLBENZENE556302255< 0.0993 < 0.0993 < 2.48 < 49.770 30,0001,2,4-TRIMETHYLBENZENE2,870 2,330 2,170< 0.322 < 0.322 < 8.05 < 161400 28,5001,3,5-TRIMETHYLBENZENE795605531< 0.104 < 0.104 < 2.60 < 52400 25,000DI-ISOPROPYL ETHER236472337< 0.105 < 0.105827335 J 70 70,000sec-BUTYLBENZENE21.3 < 25.0 < 25 < 0.125 < 0.125 < 3.13 < 62.570 8,500n-BUTYLBENZENE20.1 < 31.4 < 31.4 < 0.157 < 0.157 < 3.93< 78.5 70 6,9002-BUTANONE (MEK)54.7 J < 238 < 238 < 1.19 < 1.19 < 29.8 < 5954,000 4,000,000STYRENE44.8 51.3 J < 23.6 < 0.118 < 0.118 < 2.95 < 5970 70,000ISOPROPYLBENZENE199122 J 109 J< 0.105 < 0.105 7.66 J < 52.570 25,000p-ISOPROPYLTOLUENE9.0 J32.1 J 33 J< 0.120 < 0.120 < 3< 60 25 11,700ETHYLENE DIBROMIDE (EDB) by 504.1< 0.00547 J4 NANA < 0.00547 NA < 0.00547 NA0.02 50t-AMYL ALCOHOL (TAA)NA5,440 J 2,110 J< 4.90 < 4.904,270 < 2,450 40 40,000TERT-BUTYL ALCOHOL (TBA)NA< 812 < 812 < 4.06 < 4.0629,200 15,200 10 10,000TERT-AMYL METHYL ETHER (TAME)NA1,400 1,020< 0.195 < 0.195698137 J 128 128,000NAPHTHALENE254214NA 0.906 J NA < 0.159 NA6 6,000PHENOL3735.2NA< 4.33NA< 4.33NA30 30,0002,4-DIMETHYLPHENOL121< 0.0636 NA < 0.0636 NA < 0.0636 NA100 100,000DIETHYL PHTHALATE2.26 J 0.411 J NA < 0.287 NA < 0.287 NA6,000 --PHENANTHRENE0.165 J < 0.112 NA < 0.112 NA 0.117 J NA200 550DI-N-BUTYL PHTHALATE< 0.453 < 0.453 NA < 0.453 NA < 0.453 NA700 --MetalsLEAD95.13.12 JNA3.41 JNA27.7 JNA15 15,000NOTES:Data in ug/lMTBE - Methyl Tert Butyl EtherMADEP - Massachusetts Dept. of Environmental ProtectionJ - Reported value is an estimateEPH - Extractable Petroleum HydrocarbonsJ4- batch QC outside established QC range for accuracyVPH - Volatile Petroleum HydrocarbonsB - The same analyte was found in the associated blankVOC - Volatile Organic CompoundNA - Not AnalyzedSVOC - Semi-Volatile Organic CompoundBDL - Below Detect Level Bold data represents constituents above NCAC 2L Standards Add'tl Results 8/9/22 Sampling: MW-3 - ETBE 6.72 J ug/lHighlighted data represent constituents above GCL Standards VOCsMADEPSVOCsNCAC 2L GCLMW-3MW-2MW-1
Table 3 - Groundwater Summary Data ContinuedSam's Mart 749810 University City Boulevard, Charlotte, North Carolina NCDEQ Incident 48068 Excel Project No. 2021126SAMPLE LOCATIONDATE SAMPLED 9-Aug-22 5-Jun-23 31-Jan-23 5-Jun-23 25-Jul-22 5-Jun-23EPH C9 - C18 Aliphatics< 33.3 NA 157 NA < 33.3NA -- --EPH C19 - C36 Aliphatics33.8 JNA252NA118 BNA10,000 --EPH C11 - C22 Aromatics< 33.3 NA 674 NA 35.0 BJ NA -- --VPH C5 - C8 Aliphatics< 33.3NA3,020NA262 BNA400 --VPH C9 - C12 Aliphatics< 33.3NA9,320NA 33.9 BJ NA -- --VPH C9 - C10 Aromatics< 33.3 NA 8,480 NA <33.3 NA -- --TOTAL C9 - C18 AliphaticsBDL NA9,477NA 33.9 NA700 --TOTAL C9 - C22 AromaticsBDL NA9,154NA 35 NA200 --BENZENE< 0.0941 < 0.094110.7 < 4.71 19.4< 0.9411 5,000TOLUENE< 0.278 < 0.278 <13.9 < 13.9 1.17 < 2.78600 260,000ETHYLBENZENE< 0.137 < 0.137705< 6.85 0.174 J < 1.37600 84,500TOTAL XYLENES< 0.604 < 0.6042,281< 30.2 1.257 J < 6.04500 85,500MTBE< 0.101 < 0.1011,230 553 331 219 20 20,000NAPHTHALENE< 1< 1175 J < 50< 1< 10 6 6,000N-PROPYLBENZENE< 0.0993 < 0.0993433< 4.97 < 0.0993 < 0.99370 30,0001,2,4-TRIMETHYLBENZENE< 0.322 < 0.3222,72017.7 J < 0.322 < 3.22400 28,5001,3,5-TRIMETHYLBENZENE< 0.104 < 0.1047405.61 J < 0.104 < 1.04400 25,000DI-ISOPROPYL ETHER< 0.105 < 0.10572.750.211.3 5.58 J70 70,000sec-BUTYLBENZENE< 0.125 < 0.125 29.8 J < 6.25 < 0.125 < 1.2570 8,500n-BUTYLBENZENE< 0.157 < 0.157 43.1 J < 7.85 < 0.157 < 1.5770 6,9002-BUTANONE (MEK)< 1.19 < 1.19 < 59.5 < 59.5 < 1.19 < 11.94,000 4,000,000STYRENE< 0.118 < 0.118 < 5.9 < 5.9 < 0.118 < 1.1870 70,000ISOPROPYLBENZENE< 0.105 < 0.105104< 5.25 0.147 J < 1.0570 25,000p-ISOPROPYLTOLUENE< 0.120 < 0.120 13.6 J< 6 < 0.120 < 1.2025 11,700ETHYLENE DIBROMIDE (EDB) by 504.1< 0.00547 NA <0.00541 NA < 0.00547 J4 NA0.02 50t-AMYL ALCOHOL (TAA)< 4.90 < 4.90 < 245< 24533.8 J< 49 40 40,000TERT-BUTYL ALCOHOL (TBA)< 4.06 < 4.06 < 203 < 203 58.6 < 40.6 10 10,000TERT-AMYL METHYL ETHER (TAME)< 0.195 < 0.195 37.6 J 16.8 J179.79 J128 128,000NAPHTHALENE< 0.159 NA108NA 0.267 J NA6 6,000PHENOL< 4.33NA<4.33NA< 4.33NA30 30,0002,4-DIMETHYLPHENOL< 0.0636 NA <0.0636 NA < 0.0636 NA100 100,000DIETHYL PHTHALATE0.376 J NA <0.287 NA < 0.287 NA6,000 --PHENANTHRENE< 0.112 NA0.457 J NA 0.143 J NA200 550DI-N-BUTYL PHTHALATE< 0.453 NA <0.453 NA 0.729 J NA700 --MetalsLEAD< 2.99NA21.2NA7.89NA15 15,000NOTES:Data in ug/lMTBE - Methyl Tert Butyl EtherMADEP - Massachusetts Dept. of Environmental ProtectionJ - Reported value is an estimateEPH - Extractable Petroleum HydrocarbonsJ4- batch QC outside established QC range for accuracyVPH - Volatile Petroleum HydrocarbonsB - The same analyte was found in the associated blankVOC - Volatile Organic CompoundNA - Not AnalyzedSVOC - Semi-Volatile Organic CompoundBDL - Below Detect Level Bold data represents constituents above NCAC 2L Standards Add'tl Results 8/9/22 Sampling: MW-3 - ETBE 6.72 J ug/lHighlighted data represent constituents above GCL Standards SVOCsMW-5VW-1MW-4NCAC 2L GCLMADEPVOCs
Electrical
Conductivity ORP
(µS/cm)
MW-1 7.62 0.599 267 8.24 21.65
MW-2 7.61 0.643 167 5.60 20.57
MW-3 6.98 1.050 258 6.44 20.80
MW-4 7.72 0.313 209 6.43 20.48
MW-5 7.33 0.798 171 4.72 20.36
VW-1 8.56 0.423 137 6.64 20.34
Notes:SU Standard units
µS/cm Microsiemens per centimeter
ppm Parts per million
0C Degrees Celsius
NS Not sampled, (Dry, Not Located, Destroyed, etc…)
MW Monitoring Well
6/5/23
TABLE 4
FIELD MEASUREMENTS OF THE GROUNDWATER SAMPLES
Sam's Mart No. 74
9810 University City Blvd, Charlotte, North Carolina
Excel Project No. 2021126
Well
Identification
Sampling
Date
pH
(su)
Temperature
(0C)
Disolved
Oxygen
(ppm)

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LIST OF FIGURES

FIGURE 1 – SITE VICINITY MAP

FIGURE 2 – SITE PLAN

FIGURE 3 – GROUNDWATER CONTOUR MAP

FIGURE 4 – SOIL CONSTITUENTS MAP

FIGURE 5 – GROUNDWATER CONSTITUENTS MAP

FIGURE 6 – BENZENE GW CONSTITUENTS MAP

FIGURE 7 – TBA GW CONSTITUENTS MAP

FIGURE 8 – PROPOSED INJECTION WELL LOCATIONS MAP

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC 625 HUNTSMAN COURT GASTONIA, NC 28054 Figure 1 - Topographic Map Excel No. 2021126  N Source: USGS Harrisburg 2016
--
40 0 ---40
GRAPHIC BAR SCALE 1" = 40'
--
0
80 120
II 11 II 11 II 11 ii ii II ii II 11 1u1 s
LEGEND
Property Line (Approximate)
Roadway Centerline (Approximate)
Approximate UST Locations
Dispenser Pump Locations
Monitor Well Location
fi Hart & Hickman Temp Monitoring Well
'tl&HTMW-#
"@... Light Pole LP
+-
NOTES
Product Lines
Landscaping / Vegetation
Structure
Direction Arrow
Map not exact for sampling location
references only
Map adapted from Hart & Hickman Site Plan dated 7-9-2021., titled NCDOT Parcel 25.
Structure locations are approximate
UST -Underground Storage Tank
Excel CYv1l & Environmental Associates,, PLLC
625 HUNTSMAN COURT, GASTONIA, NC 28054
PREPARED FOR: SAM'S MART, INC
PHONE : [phone]
MAP TITLE:
PROJECT NO. :
2021126
SAM'S MART NO. 74 9810 & 9816 UNIVERSITY CITY BOULEVARD-CHARLOTTE NC
FIGURE 2 -- SITE PLAN FEASIBILITY STUDY
DRAWN BY : BJPJ APPROX. SCALE : DATE : 02/11/2022
REVSD BY : ACL 1" = 40' DATE: 2/21/2023
40 0 ---40
GRAPHIC BAR SCALE 1" = 40'
80
---=--=--=--=--=---=---=---=---=---=--=-=---=---=---=-7----------"'
0
120
I '-
___ j ____ _)
--
II 11 II 11 II 11 II 11 II 11 II 11 1u1 s LEGEND
[80.68'] • LP
NOTES
Property Line (Approximate)
Roadway Centerline (Approximate)
Approximate UST Locations
Dispenser Pump Locations
Monitor Well Location
Hart & Hickman Temp Monitoring Well
Approximate water table contour
Water Table Elevation
Light Pole
Product Lines
Landscaping / Vegetation
Structure
Direction Arrow
Map prepared from data collected on 6/5/23 MW-5 not used in creation of coutours Map not exact for sampling location
references only
Map adapted from Hart & Hickman
Site Plan dated 7-9-2021., titled NCDOT Parcel 25.
Structure locations are approximate
UST -Underground Storage Tank
Excel CYv1l & Environmental Associates,, PLLC
625 HUNTSMAN COURT, GASTONIA, NC 28054 PHONE : [phone]
PREPARED FOR: SAM'S MART, INC SAM'S MART NO. 74
MAP TITLE:
PROJECT NO. :
2021126
9810 &9816 UNIVERSITY CITY BOULEVARD-CHARLOTTE NC
FIGURE 3 --GROUNDWATER COUNTOUR MAPFEASIBILITY STUDY
DRAWN BY : BJPJ APPROX. SCALE : DATE : 06/19/2023
REVSD BY : ACL 1" = 40'
< 0.137
< 0.604
< 0.101
< 1
/ BWN INVESTMEN
_____ ,, PB 24167 PG 611
10,900
6,080
< 6.04
40 0
0
0
40 80 120
GRAPHIC BAR SCALE
1" = 40'
II 11 II 11 II 11 II 11 II 11 II 11 LJI
0
LEGEND
Property Line (Approximate)
Roadway Centerline (Approximate)
Approximate UST Locations
Dispenser Pump Locations
Monitor Well Location
� Hart & Hickman Temp Monitoring Well
ifi&HTMW-#
'@... Light Pole LP
Product Lines
Landscaping / Vegetation
Structure
NOTES
Map not exact for sampling location references only
Map adapted from Hart & Hickman
Site Plan dated 7-9-2021., titled NCDOT Parcel 25.
Structure locations are approximate
UST -Underground Storage Tank
Data provided in ug/I
Data from samples collected on 6-5-2023.
Data in orange exceeds NCDEQ GCLs
Benzene
Toluene
Ethyl benzene
Total Xylenes Constituents Shown MTBE
Napthalene
Tert-Amyl Alcohol (TAA)
Tert-butyl Alcohol (TBA)
Excel Civil & Environmental Associate� PLLC
625 HUNTSMAN COURT, GASTONIA, NC 28054 PHONE: [phone]
PREPARED FOR: SAM'S MART, INC.
MAP TITLE:
PROJECT NO. :
2021126
SAM'S MART NO. 74 9810& 9816 UNIVERSITY CITY BOULEVARD-CHARLOTTE NC
FIGURE 5 --GROUNDWATER CONSITUENTS MAP FEASIBILITY STUDY
DRAWN BY : BJPJ APPROX. SCALE : DATE : 06/19/2023
REVSD BY : ACL 1" = 40'
40 0 40
GRAPHIC BAR SCALE 1" = 40'
--=---=----=---=---=---=---=---=--=--=--=--=---=---=--=--=--=--=--=-=-7--------"---,
---=------
0
0
80 120
I ' ___ _j ____ _)
II 11 II 11 II 11 II 11 II 11 II 11 LJI
LEGEND
L__J
Property Line (Approximate)
Roadway Centerline (Approximate)
Approximate UST Locations
Dispenser Pump Locations
Monitor Well Location
_)B Hart & Hickman Temp Monitoring Well
+i&�TMW-#
'@... Light Pole LP
-
NOTES
Product Lines
Landscaping / Vegetation
Structure
Direction Arrow
Benzene Constituent of concern
Benzene lsoconcentration Line
Map not exact for sampling location & for reference only.
Map adapted from Hart & Hickman Site Plan Site Plan dated 7-9-2021., titled NCDOT Parcel 25. Data provided in ug/I
Data from samples collected on 6/5/2023. Data in orange exceeds NCDEQ GCLs Structure locations are approximate UST -Underground Storage Tank
Excel Civil & Environmental Associate� PLLC
625 HUNTSMAN COURT, GASTONIA, NC 28054 PHONE: [phone]
PREPARED FOR: SAM'S MART, INC.
MAP TITLE:
PROJECT NO. :
2021126
SAM'S MART NO. 74 9810& 9816 UNIVERSITY CITY BOULEVARD-CHARLOTTE NC
FIGURE 6 --BENZENE CONSTITUENTS MAP FEASIBILITY STUDY
DRAWN BY : BJPJ APPROX. SCALE : DATE : 06/19/2023
REVSD BY : ACL 1" = 40'
LP
! /
U'
I --
LP - �.,, BWN INVESTMENTS LLC PB 24167 PG 611
40 0 ---40
GRAPHIC BAR SCALE 1" = 40'
80
---=--=--=--=--=---=---=---=---=---=--=-=---=---=---=-7----------"'
0
0
120
I '-
___ j ____ _)
--
II 11 II 11 II 11 II 11 II 11 II 11 1u1 LEGEND
Property Line (Approximate) s
Roadway Centerline (Approximate)
Approximate UST Locations
Dispenser Pump Locations
Monitor Well Location
� Hart & Hickman Temp Monitoring Well
f'.i&HTMW-#
'@._ Light Pole LP
oO
�
20,000
NOTES
Product Lines
Landscaping / Vegetation
Structure
Direction Arrow
MTBE Constituent of concern
Map not exact for sampling location references only
Map adapted from Hart & Hickman Site Plan dated 7-9-2021., titled NCDOT Parcel 25.
Structure locations are approximate
UST -Underground Storage Tank
Data provided in ug/I
Data from samples collected on 6/5/2023.
Data in orange exceeds NCDEQ GCLs
Excel CYv1l & Environmental Associates,, PLLC
625 HUNTSMAN COURT, GASTONIA, NC 28054 PHONE : [phone]
PREPARED FOR: SAM'S MART, INC SAM'S MART NO. 74
MAP TITLE:
PROJECT NO. :
2021126
9810 &9816 UNIVERSITY CITY BOULEVARD-CHARLOTTE NC
FIGURE 7 -- TBA GROUNDWATER CONSTITUENTS MAP FEASIBILITY STUDY
DRAWN BY : BJPJ APPROX. SCALE : DATE : 06/19/2023
REVSD BY : ACL 1" = 40'

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
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LIST OF APPENDICES

APPENDIX A – PHYSICAL CHARACTERISTICS OF THE COCS

APPENDIX B – BIOREMEDIATION PROPOSALS

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
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APPENDIX A

PHYSICAL CHARACTERISTICS OF THE COCS

EXCEL CIVIL & ENVIRONMENTAL ASSOCIATES, PLLC
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APPENDIX B

BIOREMEDIATION PROPOSALS
Client Name ECEA - Sam's Mart
Project Location Charlotte, NC
Area A Area B
MW-1 MW-3
Site Information Predominate Geology of Treatment Zone
Treatment Zone Area (ft^2)3,600 1,500 5,100
Contamination Depth Start (ft bgs)8.0 8.0
Contamination Depth End (ft bgs)16.0 25.0
Treatment Volume (yd^3)1,066.7 944.4 2,011
Triangular Grid Spacing (ft)5.0 5.0
Number of Injection Points - Design 144 60 204
Injection Interval Distance (ft)1.5 1.5
Number of Injection Intervals per Point - Design 6.5 12.0
Total Number of Injection Intervals 936 720 1,656
Effective Porosity 40%40%
Pore Volume (L)326,246 288,864
Soil Density (lb/ft^3)135 135
Speciated COC Design Calculations Contaminant of Concern Benzene TBA
Design Basis Soil (mg/kg) or Groundwater (mg/L)Groundwater Groundwater
Design Concentration 10.900 15.200
Design Endpoint 5.000 10.000
Contaminant of Concern Mass Loading (lb/ft^3)2.72E-04 3.79E-04
BOS 200 per Injection Interval - Design (lb)20 15
BOS 200 Slurry Volume per Interval (gal)15 15
Average BOS 200 per Injection Point (lb)130 180
BOS 200 Total (lb)18,720 10,800 29,550
TPH Design Calculations TPH Groundwater Concentration (mg/L)0 0
TPH Soil Concentration (mg/kg)0 0
TPH Mass (lb)
BOS 200 Total Demand (lb) 0
Design Basis Select Speciated or TPH Speciated Speciated
Design BOS 200 Total per Area (lb)18,720 10,800 29,550
Trap & Treat Bacteria Calculations Bacteria Concentrate (gal)37 22 60
Kinetic Design Additives Supplemental Gypsum per Interval - Design (lb)15 5
Total Supplemental Gypsum (lb)14,040 3,600 17,650
Supplemental Magnesium Sulfate per Interval - Design (lb)15.0 8.0
Total Supplemental Magnesium Sulfate (lb)14,040 5,760 19,800
Food Grade Starch per Interval (lb)7.5 8
Total Food Grade Starch (lb)7,020 5,760 12,800
Yeast Extract per Interval (lb)0.20 0.42
Total Yeast Extract (lb)186 305 495
Slurry and Water Volumes Slurry Volume per Interval (gal)20 30
Estimated Water Volume (gal)18,720 21,600 40,320
Totals
6/29/2023
Client Name ECEA - Sam's Mart
Project Location Charlotte, NC
Summary BOS 200 Total (lb)29,550
BOS 200 Unit Price ($/lb, per RPI website)$6.00
Bacteria Concentrate (gal)60
Bacteria Concentrate Price ($/gal, per RPI website)$115
Supplemental Gypsum Total (lb)17,650
Gypsum Unit Price ($/lb)$0.50 `
Magnesium Sulfate Total (lb)19,800
Magnesium Sulfate Unit Price ($/lb)$0.65
Starch Total (lb)12,800
Starch Unit Price ($/lb)$1.20
Yeast Extract Total (lb)55
Yeast Extract Unit Price ($/lb)$13.50
Estimated Shipping and Tax ($/lb)$0.35
Total Material Price ($)$232,340
Number of Field Days to Complete 16
Mobilization ($)$2,000
Total Installation Price ($)$110,800
Estimated RDC Price ($)$13,500
Total Estimated Price ($)$356,640
6/29/2023
ASSUMPTIONS
AST has made the following assumptions regarding this approach: 1. Pricing for products and services is valid for 180 days from the date of this proposal.
2. AST will support ECEA in preparing the UIC permit. 3. Pricing of the BOS 200® is based on the quantities outlined above. Should any of the Proposed Injection Areas be removed from this design, pricing of the BOS 200® must be
adjusted to conform to the pricing structure shown at: http://www.trapandtreat.com/products/quantity-pricing/ 4. There will be adequate water onsite (25-gpm service) to prepare the BOS materials for injection. The water service within 200’ of all injection locations and fire hoses can be placed and remain in-place for the duration of the injection. Shuttling of water is not required. The water will be provided at no cost to AST. Hydrant permits and fees will be
provided by others. 5. The site stratigraphy allows for pushing up to 250 linear feet of 2.25” Geoprobe® rods per day and injection of up to 500 lbs. of BOS 200® per day. 6. Work is performed during standard work week and hours (Monday-Saturday 7am-6pm) 7. Asphalt/concrete penetrations will be patched with like materials. 8. All utilities and underground appurtenances will be located prior to AST arriving on site. AST has not included any provisions to perform subsurface utility clearance (such as hand auger boreholes or contracted utility location services). Hand augering and/or other invasive utility clearances such as air knife will be performed at a minimum of 72-hours prior to mobilization of AST Injection Staff and this service is not included or priced in this proposal. This can be provided by AST for an additional cost. AST will not be responsible
for repairs to mis-marked or unmarked buried utilities and other appurtenances. 9. Investigated derived waste will be drummed and staged on site for disposal by others. 10. Boring logs will be prepared by others during the injection effort.
11. The total depth throughout the area identified in the injection design will be accessible via direct push utilizing a Geoprobe® 7000 series rig. 12. Traffic control will be provided by others if required.
13. The project is non-union and will not require prevailing wages. 14. After hours security will be provided by others at no cost to AST, if deemed necessary.
15. ECEA will provide a dumpster for general refuse such as empty paper bags, pallets and other non-hazardous waste. 16. Cold Weather Protocol a. All injection work is to be performed with overnight temperatures above 32 degrees F. If injections are to be performed with overnight lows below 32 degrees F, the installation price will be subject to an additional 25% charge to account for loss
time for additional shutdown/startup time for the injection system. b. Injection work in temperatures below 20 degrees F is a health and safety concern for the injection crew. If temperatures are not above 20 degrees F by 10 a.m., no injection work will be performed that day. A daily stand by rate will be charged for days lost due to cold weather.
Payment terms are full payment of product and shipping costs upon arrival. Payment of injection services is not to exceed 60 calendar days from date of invoice. Interest will accrue at a monthly rate of 1.5% for all outstanding balances including interest. The interest rate will be prorated for
partial months.

< 0.137
< 0.604
< 0.101
< 1
/ BWN INVESTMEN
_____ ,, PB 24167 PG 611
10,900
6,080
< 6.04
40 0
0
0
40 80 120
GRAPHIC BAR SCALE
1" = 40'
II 11 II 11 II 11 II 11 II 11 II 11 LJI
0
LEGEND
Property Line (Approximate)
Roadway Centerline (Approximate)
Approximate UST Locations
Dispenser Pump Locations
Monitor Well Location
� Hart & Hickman Temp Monitoring Well
ifi&HTMW-#
'@... Light Pole LP
Product Lines
Landscaping / Vegetation
Structure
NOTES
Map not exact for sampling location references only
Map adapted from Hart & Hickman
Site Plan dated 7-9-2021., titled NCDOT Parcel 25.
Structure locations are approximate
UST -Underground Storage Tank
Data provided in ug/I
Data from samples collected on 6-5-2023.
Data in orange exceeds NCDEQ GCLs
Benzene
Toluene
Ethyl benzene
Total Xylenes Constituents Shown MTBE
Napthalene
Tert-Amyl Alcohol (TAA)
Tert-butyl Alcohol (TBA)
Excel Civil & Environmental Associate� PLLC
625 HUNTSMAN COURT, GASTONIA, NC 28054 PHONE: [phone]
PREPARED FOR: SAM'S MART, INC.
MAP TITLE:
PROJECT NO. :
2021126
SAM'S MART NO. 74 9810& 9816 UNIVERSITY CITY BOULEVARD-CHARLOTTE NC
FIGURE 4 --GROUNDWATER CONSITUENTS MAP FEASIBILITY STUDY
DRAWN BY : BJPJ APPROX. SCALE : DATE : 06/19/2023
REVSD BY : ACL 1" = 40'
27-Jun-2023
Total
56,000
Number of
Deliveries
N/A
Total:

Customer:ECEA
Proposal Number:25557
Contact:
25% NaOH
Prepared by:
Derek Macaulay
Charlotte, NC
Aaron Long
1-267-908-0668
[e-mail]
Site Location:
Cost in $USD
(FOB Origin)($USD / lb)
Unit RatePackaging TypeItem (lbs)
Quantity
Klozur® SP Demand Calculations and Cost Estimate
2) Price valid for 30 days from date at top of document. Terms: net 30 days. Prices are FOB Origin.
$61,197
1,488
Klozur® SP
55.1 lb bags (partial pallet)
1) Number of packages needed is rounded up to nearest whole unit.
Estimated
Cost Per Delivery4
N/AShipping Not Included
Not Included
$25,200
$33,7211.5355.1 lb bags 22,040
23,528 $35,997
1.53 $2,276
Totes
Klozur®
Activator(s)
4) If shipping not included, estimated freight rates available upon request. Freight rates provided are estimates only. Standard delivery time can vary from 1-3 weeks from time
of order, depending upon volume. Expedited transport can be arranged at extra cost.
5) Return Policy: Within 90 days of sale and following written approval by Evonik, products in their unopened containers, which by analysis meet the original specifications and
are in the same condition as they were shipped, will be accepted for return at invoiced price, less a 25% handling charge and return freight paid by buyer. Products that are
made to order or custom blended are non-returnable. Returned products that are not received back by Evonik in the same condition as they were shipped or that have been
stored outside, may be subject to a higher restocking fees or no refund at all.
6) All sales are per Evonik's Terms and Conditions.
7) All disclaimers within the standard proposal/demand calculator attachments apply to any and all estimates.
Taxes3
3) Any applicable taxes not included. Please provide a copy of your tax exempt certificate or resale tax number when placing your order. In accordance with the law, applicable state and local taxes will be applied at the time of invoicing if Evonik has not been presented with your fully executed tax exemption documentation.
0.45
1 of 6 6/27/2023#[confidential]
Value Unit
43 ft
100 ft
4,300 ft2
8 ft bgs
24 ft bgs
16 ft
68,800 ft3
35 %
180,107 USG
110 lbs/ft3
7,568,000 lb
100 %
3 g 25 percent
NaOH / kg soil
1 g Klozur / kg soil
Disclaimer:
calculated value
Soil Mass calculated value
Soil Oxidant Demand
Note
customer supplied
Treatment Zone Thickness customer supplied

SITE INFORMATION
default value
estimated value, it is recommend
that this be analytically determined
default value
calculated value
Klozur® SP is an environmental grade sodium persulfate which has been delivered safely and cost effectively to treat a wide variety of
common contaminants of concern with an unmatched combination of power and control. With proper activation, Klozur SP can generate
both oxidative and reductive pathways delivering the power to destroy the most recalcitrant of contaminants.
For more information on activated Klozur® SP, please contact your Evonik technical representative or www.klozur.com.
Target Area Width (perpendicular to
GW flow direction)
default value
customer supplied
customer supplied
* Fraction soil mass contacted may be less for sites with contact limitations such as fractured bedrock or those with low permeable materials.
The estimated dosage and recommended application methodology described in this document are based on the site information provided to Evonik, but
are not meant to constitute a guaranty of performance or a predictor of the speed at which a given site is remediated. Klozur® persulfate and activator
demand calculations do not take into account the kinetics, speed of the reaction, or ability to establish contact between the reagents and contamination in
the subsurface. These calculations represent the minimum anticipated amount needed to treat the contaminants of concern (COCs). As a result, these
calculations should be used as a general approximation for purposes of an initial economic assessment. Evonik recommends that oxidant demand and
treatability testing be performed to verify the quantities of oxidant needed.
Target Area Length (Parallel to GW
flow direction)
Ground Water Volume
Area of Treatment
Treatment Volume
Top of Treatment Zone
Base of Treatment Zone
Base Buffering Capacity
(Alkaline Activation only)
Fraction Soil Mass Contacted*
Soil Density
PROPOSAL ATTACHMENTS
PRODUCT OVERVIEW
customer supplied
customer supplied
Porosity
estimated value, it is recommend
that this be analytically determined
page 2 of 6 6/27/2023#[confidential]
GW Soil NAPL
(mg/L)(mg/kg)(lbs)
1.9 0.8 0.0
1.5 0.3 0.0
GW Soil NAPL
(mg/L)(mg/kg)(lbs)000
000
Klozur SP
Demand Safety Factor
267 3.0 lb7,568 3.0 lb
23,505 lb 1To be applied in
KLOZUR® PERSULFATE DEMAND
application
22,704Demand from SOD
The estimated mass of Klozur® SP accounts for target demand with the COCs, non-target demand associated with the soils (SOD) and a
safety factor applied to each. The safety factor is intended to account for potential variability in the COC and SOD estimates and any
other uncertainties associated with the application or site.
The demand from COCs was estimated using:
*Unless provided, sorbed concentrations were roughly estimated based on expected groundwater concentrations, foc and Koc values. For a more refined estimate, it is recommended that actual values be verified via direct sampling of the targeted treatment interval.
801Demand from COCs
Total Klozur® SP Demand:
The degradation ratio should be determined/verified in
a bench or field test
Klozur SP Demand
with Factor
*** Includes estimated contaminant mass in soil, groundwater, and NAPL (if provided) at the site with the remedial goals subtracted from the total mass onsite.
Remedial Goals and Target Mass Reductions:
Contaminant (lbs)
benzene
** Includes estimated contaminant mass in soil, groundwater, and NAPL (if provided) at the site.
TBA 4.5
Total COC Mass
Targeted***
Degradation Ratio
TBA 4.5
Total COC Mass**
benzene
The following are estimates of the contaminant concentration in soil and groundwater within the target area. The total COC mass was
calculated including estimated COC mass in groundwater, soil and NAPL, if present, within the targeted area.
Concentrations:
Contaminant 8.8 (lb)
CONTAMINANTS OF CONCERN* (COCs)
The target demand is determined by also accounting for remedial goals for each contaminant and represents the estimated mass reductions targeted for each contaminant.
8.8
page 3 of 6 6/27/2023#[confidential]
# of packages /
pallet
40
Unit Rate
($USD / lb)
1.53
1.53
55.1 lb bags
2,204
KLOZUR® SP PACKAGING OPTIONS AND PRICING
55.1 lb bags
1,488
Total Project Demand
55.1 lb bags (partial pallet)
22,040 $33,721
Estimate for :
$2,276
Klozur® SP can be delivered to your site in a variety of packages including in bags, or two sizes of super sacks for your handling convenience. Pricing below is exclusive of shipping and any applicable taxes.
lb Klozur® SP / pallet
1,488
$35,997
55.1 lb bags (partial pallet)
(FOB Origin)Packaging Type
Packaging Type # of packages
needed
400
27
(lbs)
Cost in $USDQuantity
page 4 of 6 6/27/2023#[confidential]
Units
25 % w/w
31,621
22,704
Totes 2,800
20
56,000
Alkaline activated persulfate is the most commonly used activation method. Alkaline demand is a funcation of the alkalinity needed to
neutralize generate HSO4- from persulfate decomposition plus the amount needed to raise ground water / soil to a pH > 10. Common
alkaline sources include 25% NaOH, hydrated lime, and Portland cement.
Sodium hydroxide is a highly soluble form of alkalinity that is commonly used for injection events with Klozur® SP. Evonik recommends
using 25% NaOH solutions as it has higher solubilities and minimal heat of dissolution issues.
Calculation for NaOH (high pH) demand:
Note: Only one type of activator is typically needed.
Klozur® activation chemistries are used to convert Klozur® SP into the highly reactive radicals. Choosing the right activator chemistry for your contaminants of concern is important in obtaining a successful site remediation. The choice of activator will be dependent upon the target contaminants, site lithology and hydrogeology, and other site conditions. While activator demand quantities for all methods are given, not all activation methods are recommended for your given contaminant or site conditions. Please consult with an Evonik technical representative for proper selection of activation chemistry.
Soil buffering amount lb Solution
Package Mass lb Solution
Number of Packages
** note: the addition of highly concentrated or crystalline NaOH to water is very exothermic. Add NaOH slowly to water, and allow for excess heat to dissipate.
*Evonik Industries AG is the owner or licensee under various patent applications relating to the use of activation chemistries
KLOZUR® ACTIVATION CHEMISTRIES
NaOH demand for HSO4 neutralization
Alkaline (High pH) Activation
NaOH Solution Concentration
Package Type
lb SolutionTotal NaOH demand
lb Solution
page 5 of 6 6/27/2023#[confidential]
1
23,528 lb
16 g/L
1.6
3.1 g/kg
17 locations
10.0 ft
6.5 ft
17 %
15.9 ft
81,000 gal
52 %
4,765 gal
35 g/L
3.4 % w/w
1,384 lb
3,294 Lbs Solution
Notes:
Design parameters should be considered approximations and suggestions. Site design engineers and contractors are
ultimately responsible for the field application and design.
Application rate by soil mass (dry weight)
Approximate Spacing between locations4
Radius of Influence
Design1
Below is an example injection scenario for the proposed mass Klozur® SP for this site. The suggested injection volumes may be altered
based on the site specific conditions.
Number of Injection Locations
Concentration in Total Pore Volume
Number of Applications
% w/w
Percentage of Effective Pore Volume
Klozur® SP Injection Concentration
1. Design radius of influence corresponds to the desired treatment radius from each injection location.
Values are based upon client supplied data and other assumed values. Changes in any of the input values will affect and alter other
values
2. Injection radius of influence corresponds to the distance from each injection point the injection volume would distribute assuming uniform (cylindrical) distribution in the effective pore volume.
3. Approximate percentage of overlap between the Design ROI from the various injection locations. Actually percent overlap will depend upon injection location layout.
4. Approximate distance between injection locations. Actual distance will depend upon site layout.
Klozur® SP
25% NaOH
Volume per Injection Location
Project Totals
Mass per Injection Location
Injection2
Injection Details
Injection Locations
Klozur® SP will be delivered as a dry powder, packaged in 55.1-lb (25 Kg) bags, and 2,204 lb (1,000 Kg) supersacks (1,102 lbs, or 500
Kg, supersacks are available as special order items). Klozur® SP is highly soluble in water and can be injected via fixed wells, open
boreholes or using direct push technology (DPT). Klozur® SP is typically batched at a concentration of between 50 to 450 g/L (5 to 35%) and Evonik recommends injecting at a concentration between 50 and 250 g/L, depending upon site design and conditions.
Effective treatment requires establishing contact between a sufficient amount of activated persulfate and the contaminant in the subsurface. A key element of establishing this contact in a source zone is the injection volume used to inject the activated persulfate reagents. Depending on the application method employed and site conditions, between 20% and 100% (with >50% typical) of the
effective porosity is normally targeted during Klozur® SP injection, with a higher percent pore fill normally targeted for sites with slow
groundwater velocities
Overlapping Design ROI3
Mass of Klozur® SP
Klozur SP Dosage Project Totals
INSTALLATION VIA INJECTION
Total Injection Volume
page 6 of 6 6/27/2023#[confidential]
Evonik Active Oxygens | KLOZUR® SP | March 2022 1/1
Product SheetKLOZUR® SP
Disclaimer This information and any recommendations, technical or otherwise, are presented in good faith and believed to be correct as of the date prepared. Recipients of this information and recommendations must make their own determination as to its suitability for their purposes. In no event shall Evonik assume liability for damages or losses of any kind or nature that result from the use of or reliance upon this information and recommendations. EVONIK EXPRESSLY DISCLAIMS ANY REPRESENTATIONS AND WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, AS TO THE ACCURACY, COMPLETENESS, NON-INFRINGEMENT, MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE (EVEN IF EVONIK IS AWARE OF SUCH PURPOSE) WITH RESPECT TO ANY INFORMATION AND RECOMMENDATIONS PROVIDED. Reference to any trade names used by other companies is neither a recommendation nor an endorsement of the corresponding product, and does not imply that similar products could not be used. Evonik reserves the right to make any changes to the information and/or recommendations at any time, without prior or subsequent notice.
EVONIK INDUSTRIES AG
Active Oxygens
[e-mail]/remediation
KLOZUR® SP is the oxidant of choice for in situ chemical
oxidation (ISCO), because of its proven ability to treat a
wide range of contaminants including chlorinated solvents,
petroleum and PAHs. Based upon an environmental grade of
sodium persulfate (SP), KLOZUR® SP is ideal for contaminated
source zones and hot spots that require rapid treatment.
When properly activated, KLOZUR® SP provides an unmatched
combination of oxidative power, versatility, and control that
can be delivered both safely and cost effectively. Successful
field applications of KLOZUR® activated persulfate have
been performed globally. These applications demonstrate the
ability of KLOZUR® activated persulfate to treat diverse
organic contaminants of concern including: chlorinated
ethenes (TCE, PCE, DCE and vinyl chloride), chlorinated
ethanes (TCA and DCA), chlorinated methanes (carbon
tetrachloride and methylene chloride), BTEX, MTBE,
polyaromatic hydrocarbons (PAHs), petroleum hydrocarbons
(TPHs, GRO, DRO), 1,4-dioxane and pesticides.
KEY BENEFITS
When used with Evonik’s patented activation methods,
KLOZUR® SP produces the powerful oxidative (SO4-•, OH•)
and reductive (O2-•) radicals creating a multi-radical attack
for the rapid destruction of recalcitrant compounds.
S₂O₈-2 + Activator → SO₄-•, OH•, O₂-•
Multiple activation options and methods of delivery provide
for a flexible and custom solution based on site conditions.
With a solubility limit of up to 40 wt%, KLOZUR® SP can be
applied as a fully soluble solution. KLOZUR® SP is a stable
oxidant given its high oxidation potential, with a typical
active lifetime in the subsurface of weeks to months,
providing an extended radius of influence. KLOZUR® SP is
safe to handle with Evonik’s recommended use guidelines
and does not generate heat or gas.
THE SOUND SCIENCE OF KLOZUR® ACTIVATED PERSULFATE
KLOZUR® activated persulfate has a long history of documented
success having been used at thousands of sites to remediate
contaminants of concern around the world. The field
application of KLOZUR® activated persulfate has been
scientifically validated in hundreds of independent peer-
reviewed journal articles and conference presentations.
APPLICATION METHODS
•Direct push injection
•Fixed well injection
•Soil blending
For more information and detailed case studies, please visit our website.
EXAMPLES OF CONTAMINANTS OF CONCERN
CHLORINATED SOLVENTSPCE, TCE, DCE, VC, TCA, DCA, methylene chloride, carbon tetrachloride, chlorobenzene
PETROLEUMTPH, BTEX, DRO, GRO
PAHscreosote, MGP residuals 1,4-dioxane, MTBE, TBA, energetics, chlorinated pesticides
THE FIELD PROVEN AND VERSATILE ISCO SOLUTION TO ADDRESS SOIL & GROUNDWATER CONTAMINATION
SAFETY DATA SHEET
Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 1 of 7
1. PRODUCT AND COMPANY IDENTIFICATION
Product Identifier
Product Name: Nutrisulfate® Liquid Synonyms: Sulfate-Enhanced Remediation Product, Epsom Salt, Magnesium Sulfate Heptahydrate Product Form: Mixture
Recommended use of the chemical and restrictions on use Recommended Use: Remediation of contaminated groundwater and soils. Restrictions on Use: Use as recommended by the label
Details of the supplier and of the safety data sheet
Supplier Tersus Environmental, LLC 1116 Colonial Club Rd Wake Forest, NC 27587 Phone: [phone] Email: [e-mail]

Emergency telephone number
For leak, fire, spill or accident emergencies, call: [phone] (Tersus Office Hours, 8:00 AM to 5:00 PM Eastern) [phone] (Tersus Outside office hours) [phone] (Chemtrec 24 Hour Service – Emergency Only) [phone] (Chemtrec Outside United States 24 Hour Service – Emergency Only)

2. HAZARD IDENTIFICATION
Classification of the substance or mixture This product is not considered hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200).
Label Elements
The product contains no substances which at their given concentration, are considered hazardous to health. Causes mild irritation to the eyes. No known adverse effects. Causes nausea, vomiting, abdominal cramps, and diarrhea. Spilled material can be slippery.
Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 2 of 7
3. COMPOSITION/INFORMATION ON INGREDIENTS

Chemical Formula Mixture
Hazardous Components
This product is not considered hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200). No known chronic hazards. Not listed by NTP, IARC or OSHA as a carcinogen.

Components
Chemical Name CAS Number Concentration (%)
Magnesium Sulfate Heptahydrate 10034-99-8 10 – 30 Nutrimens® Liquid, Yeast Fermentation Product Proprietary 0 - 5
Water 7732-18-5 Balance Synonyms are provided in Section 1. Occupational exposure limits, if available, are listed in Section 8.

4. FIRST AID MEASURES General Information In all cases of doubt, or when symptoms persist, seek medical attention. Never give anything by mouth to an unconscious person. Give psychological aid. Keep the victim calm, avoid physical strain. Take victim to a doctor if irritation persists. Remove affected person from source of contamination. Eye Contact Irrigate copiously with clean water for at least 15 minutes, holding the eyelids apart and seek medical attention. Skin Contact May cause an allergic skin reaction. Remove contaminated clothing. Wash skin thoroughly with soap and water or use a recognized skin cleanser. Inhalation If inhaled: remove person to fresh air. Seek medical attention if you feel unwell. Ingestion Rinse out mouth with water. Health injuries are not known or expected under normal use. Most important symptoms and effects, both acute and delayed
Information not available
Indication of any immediate medical attention and special treatment needed
If exposed or concerned, get medical advice and attention.

5. FIRE-FIGHTING MEASURES

Suitable Extinguishing
Media
Water. Water fog. Foam. Dry chemical powder. Carbon dioxide (CO2).
Specific Hazards Arising
from the chemical or
mixture
During fire, gases hazardous to health may be formed.
Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 3 of 7
Special Fire Fighting
Procedures
This material is non-combustible. Self-contained breathing apparatus
and full protective clothing must be worn in case of fire.

6. ACCIDENTAL RELEASE MEASURES
Personal Precautions Provide enough ventilation. Advice for emergency responders: protective equipment see Section 8. Wear protective clothing as described in Section 8 of this safety data sheet. Do not smoke or use open fire or other sources of ignition. Contact with walking surface may result in formation of slippery film/falling hazard.

Environmental Precautions Do not discharge into drains, sewers or watercourses or onto the ground. Inform the relevant authorities if this occurs. Spilled product should be removed immediately. Avoid contamination of waterways and (if large quantity) vegetation.
Methods for Containment
and Clean Up
Spilled product should be removed immediately. Avoid contamination of waterways and (if large quantity) vegetation. Absorb in non-combustible material, vermiculite, dry sand or earth and place into containers.

7. HANDLING AND STORAGE
Precautions for safe
handling
Avoid breathing dust. Promptly clean up spills.
Hygiene measures Handle in accordance with good industrial hygiene and safety procedures. Use good personal hygiene practices.
Conditions for safe storage,
including any
incompatibilities
Keep containers closed and protected from extremes of temperature and humidity during storage. Recommended storage conditions 68-

8. EXPOSRE CONTROL / PERSONAL PROTECTION

Control parameters Exposure guidelines, ingredients with workplace control parameters.

Name CAS-No OSHA ACGIH NIOSH Supplier
Magnesium Sulfate Heptahydrate
10034-99-8 No Established Limit No Established Limit No Established Limit No Established Limit
Yeast Fermentation Product Proprietary

Carcinogen Data

Name CAS-No OSHA NTP IARC
Magnesium Sulfate Heptahydrate
10034-99-8 Select Carcinogen: No Known: No; Suspected: No Group 1: No; Group 2a: No; Group 2b: No; Group 3: No; Group 4: No
Yeast Fermentation Product Proprietary
Select Carcinogen: No Known: No; Suspected: No Group 1: No; Group 2a: No; Group 2b: No; Group 3: No; Group 4: No

Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 4 of 7
Exposure Control
Protective equipment
Appropriate engineering
controls

Provide adequate ventilation. Where reasonably practicable this should
be achieved using local exhaust ventilation and good general extraction. If these are not enough to maintain concentrations of particulates and any vapor below occupational exposure limits suitable respiratory protection must be worn.
Eye/face protection

The following protection should be worn: Safety glasses with shields, chemical splash goggles or face shield.

Respiratory protection Confined spaces that held yeast fermentation product could potentially contain carbon dioxide gas. Use NIOSH/MSHA approved self-contained breathing apparatus or supplied respirator if oxygen content below 19%.
Use in accordance with 29 CFR 1901.134.
Hand protection

Neoprene. Vinyl, Rubber (natural, latex), Butyl rubber. Wear protective
gloves made of the following material: Chemical-resistant, impervious gloves complying with an approved standard should be worn if a risk assessment indicates skin contact is possible. Polyvinyl chloride (PVC). Manufactured/tested in accordance with EN 374, Avoid the following
conditions: Polyvinyl alcohol (PVA).

Other skin and body
protection

Wear appropriate clothing to prevent any possibility of skin contact.
Hygiene measures

Wash promptly if skin becomes contaminated. Wash hands at the end of
each work shift and before eating, smoking and using the toilet. When using do not eat, drink or smoke.
9. PHYSICAL AND CHEMICAL PROPERTIES

Information on basic physical and chemical properties
Appearance Tan to brown liquid Odor Fermented, yeasty aroma
Odor threshold Unknown pH 6-7
Melting point /Freezing Point Unknown Initial Boiling point and boiling point
range
Unknown
Flash Point Unknown
Evaporation rate Unknown Flammability (solid; gas) Will not burn
Upper/lower flammability or explosive limits Unknown
Vapor pressure Unknown Vapor density Unknown Specific gravity 1.25 – 1.35 Solubility (ies) Soluble Partition coefficient: n-octanol/water Unknown
Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 5 of 7
Initial Boiling point and boiling point range Unknown
Auto-ignition temperature Unknown Decomposition temperature Unknown Viscosity Unknown

10. STABILITY AND REACTIVITY

Reactivity Stable under normal conditions and use.
Chemical stability Material is stable under normal conditions.
Possibility of hazardous
reactions
No dangerous reaction known under conditions of normaluse.
Conditions to avoid Contact with incompatible materials.
Incompatible materials Strong oxidizing agents.
Hazardous decomposition
products

At very high temperatures, magnesium oxide, sulfur dioxide, and sulfur trioxide may be generated.

11. TOXICOLOGICAL INFORMATION

Acute Toxicity Data is not available.
Persistence and degradability There is no data available on the preparation itself.

Bioaccumulative potential
Not Measured
Mobility in soil No data available.

Results of PBT and vPvB assessment
This product contains no PBT/vPvB chemicals.
Other adverse effects No data available.

12. ECOLOGICAL INFORMATION

Chemical Fate Information Information Not Available
Biodegradability Readily degradable. Excess product in waterways may encourage eutrophication.

13. DISPOSAL CONSIDERATIONS
Waste Disposal Methods Waste material is not a hazardous waste. Dispose in accordance with federal, provincial and local regulations.

Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 6 of 7
14. TRANSPORTATION INFORMATION

U.S. (D.O.T.) Proper Shipping Name: Chemicals not otherwise indexed (NOI) nonhazardous. Hazard Class: Not applicable UN/NA: Not applicable Labels: Not applicable
Canada (T.D.G.) Proper Shipping Name: Chemicals not otherwise indexed (NOI) nonhazardous. Hazard Class: Not applicable UN/NA: Not applicable Labels Not applicable
IMDG Proper Shipping Name: Chemicals not otherwise indexed (NOI) nonhazardous.
Hazard Class: Not applicable UN/NA: Not applicable Labels: Not applicable

IATA Proper Shipping Name: Chemicals not otherwise indexed (NOI) nonhazardous.
Hazard Class: Not applicable UN/NA: Not applicable Labels: Not applicable

15. REGULATORY INFORMATION

TSCA No
WHMIS Classification D2B
US EPA Tier II Hazards Fire No
Sudden Release of Pressure No Reactive No
Immediate (Acute) Yes Delayed (Chronic) No

EPCRA 311/312 Chemicals and RQs
To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.

EPCRA 302 Extremely Hazardous To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.

EPCRA 313 Toxic Chemicals
To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.
Proposition 65 - Carcinogens (>0.0%) To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.

Proposition 65 - Developmental Toxins (>0.0%)
To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.
Proposition 65 - Female Repro Toxins (>0.0%)
Nutrisulfate® Liquid Revision Date: 4/19/2022 Version 1.2
Page 7 of 7
To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.
Proposition 65 - Male Repro Toxins (>0.0%) To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.
New Jersey RTK Substances (>1%)
To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.
Pennsylvania RTK Substances (>1%) To the best of our knowledge, there are no chemicals at levels which require reporting under this statute.
16. OTHER INFORMATION Components not precisely identified are proprietary or non-hazardous.
Disclaimer: The information contained in this Safety Data Sheet (SDS), as of the issue date, is believed to be true and correct. However, the accuracy or completeness of this information and any recommendations or suggestions are made without warranty, express or implied, or guarantee. Tersus Environmental, LLC urges each customer or recipient of this SDS to study it carefully and consult appropriate expertise, as necessary or appropriate, to become aware of and understand the data contained in this SDS and any hazards associated with the product. Regulatory requirements are subject to change and may differ between various locations. It is the buyer's/user's responsibility to ensure that his activities comply with all federal, state, provincial or local laws. Since we cannot control the application, use or processing of the product, we do not accept responsibility. Therefore, it is the buyer's/user's duty to determine the conditions necessary for the safe use of this product and assure that the intended use of the product will not infringe in any party’s intellectual property right. The information presented here pertains only to the product as shipped. All recommendations for the use of our products, whether given by us, orally or to be implied from data or lab tests results by us, are based on the current state of our knowledge at the time those recommendations are made. When additional information is obtained, these recommendations may be updated. They may also be influenced by circumstances outside our control. Notwithstanding, such recommendation the user is responsible that the product as supplied by us is suitable to the process or purpose he/she intends to use it. Due to the proliferation of sources for information such as manufacturer specific SDSs, we are not and cannot be responsible for SDSs obtained from any source other than ourselves. If you have obtained an SDS from another source or if you are not sure that the SDS you have is current, please contact us for the most current version.
919.453.5577 • [e-mail] • tersusenv.com Nutrisulfate is a Registered Trademark of Tersus Environmental, LLC Copyright © 2022 Tersus Environmental, LLC. All Rights Reserved.
End of Safety Data Sheet
Tersus Opportunity No. Q23-3971
Date:6/28/2023
Expiration Date:7/28/2023
Source Area
120 2.20 lbs./kg
90 7.48 gal/ft3
10,800 28.3 liters/ft3
15 119.8 g/L to lbs./gal
Soil Type Saprolites Clay
Porosity (n, %)40%
10%
16,200
121,184
458,732
100
16,200,000
Injection Minimum
Quantity Units Qty Units Subtotal Estimated
Freight
Estimated
Total
(USD)
Desired In Situ Sulfate Concentration (g/L)0.7
Nutrisulfate® Liquid (lbs.)6,656
$16,125.00
7.25%
$1,169.06
$17,294.06
Treatment Area (A, ft2)
Amendment Quantity and Ballpark Cost Estimate
Approach 1: MW-1 and MW-3 Areas - SEISB
Excel Environmental
Sam's Mart 74, 9810 University City Boulevard, Charlotte, NC
Treatment Location Specifications Conversion Factors
Length (ft)
Width (ft)
Shipped Mass Unit Cost
Sulfate Enhanced In Situ Bioremediation
Target Total Treatment Thickness (z, ft)
Effective Porosity (ne, %)
Total Pore Volume in Target Area (PV, ft3)
Total Pore Volume in Target Area (PV, gal)
Total Pore Volume in Target Area (PV, liters)
Soil Bulk Density (lbs/ft3)
Nutrisulfate® Liquid (lbs.)7,000 lbs. 3
Soil Mass, lbs.
Suggested Amendments
SUBTOTAL
Estimated minimum combined 2023 sales tax rate for Charlotte, North Carolina
Estimated Sales Tax
TOTAL
NOTES:
1. Payment Terms: Net 30 Days Upon Credit Approval in U.S. Dollars. Payment is not contingent on the Buyer’s ability to collect or obtain funds from any other party.
2. A copy of our Terms and Conditions of Sale is available at www.tersusenv.com/images/legal/terms.pdf and is incorporated as a part of this Quotation.
3. All price quotes are based on Net 30 Day payment terms upon credit approval, the acceptance of the Terms and Conditions of Sale, current rate schedules from our suppliers, and valid until the expiration date shown in this Quotation.
4. Freight estimates are good for 30 days pending carrier availability, and billed freight costs are based on carrier rate at the time of delivery. Liftgate, pallet jack, delivery appointments, and call before delivery are not included in freight estimate provided. These services may be available upon request
at an additional fee. Actual charges are calculated at the time of invoice.
5. The cost for the recycling/disposal of empty containers is not included in this estimate and will be the responsibility of the Buyer.
6 .Sales tax charges are estimated based on the delivery location provided. The actual sales tax rate is calculated at the time of invoice. Variations are due, but not limited to, county and or local sales tax rates.
HOW TO ORDER: If our quotation is acceptable, please indicate agreement by having an authorized representative sign in the space provided below and email an executed copy to [e-mail].
$16,125.00per Tote $14,625.00Totes8,250 lbs. $4,875 $1,500.00
Confidential 6/28/2023 tersusenv.com • 919.453.5577
Sam's Mart 74
9810 University City Blvd Charlotte,
North Carolina
Summary of Bioremediation Proposals
Excel Project No. 2021126
AST PeroxyChem Tersus
Environmental Pilot Test
2,000.00$ NA NA NA
232,340.00$ 61,197.00$ 16,135.00$ 1,613.50$
Total Bioremediation Material Price Option 2 NA 60,004.00$ NA NA
NA NA NA NA
NA NA NA NA
Included 5,500.00$ 2,500.00$ 1,700.00$
Included 5,000.00$ 2,000.00$ 500.00$
110,800.00$ NA NA NA
13,500.00$ NA NA NA
500.00$ 500.00$ 500.00$ 500.00$
NA NA NA NA
NA NA NA NA
359,140.00$ 72,197.00$ 21,135.00$ 4,313.50$
700.00$ 700.00$ 700.00$ 700.00$
NA 6,880.00$ 6,880.00$ 6,880.00$
NA 4,000.00$ 4,000.00$ 4,000.00$
NA 15,000.00$ 15,000.00$ NA
NA 30,000.00$ 25,000.00$ 5,500.00$
2,000.00$ 2,000.00$ 2,000.00$ 2,000.00$
625.00$ 625.00$ 625.00$ 625.00$
3,325.00$ 59,205.00$ 54,205.00$ 19,705.00$
362,465.00$ 131,402.00$ 75,340.00$ 24,018.50$
Estimated Drilling of Injection Points
Injection Costs
Misc. Services
Estimated Injection
Pilot Injection Point Installation
VENDOR
ITEM
Total Cost
Total
Estimated Drilling & Installation of Injection Points
Shipping Costs
Estimated Taxes
Excel Civil & Environmental Associates
GRAND TOTAL
Mob / Demob
Total Bioremediation Material
UIC Permit
Office & Reporting
Total
Pilot Testing
Bench Testing
Laboratory (SOD TOD NOD)
Groundwater Quality Sampling
Office & Reporting
Mobilization for Pilot Testing, Injection, Sampling