23088_Electrical App_GW WP-Approval 20200522

May 22, 2020

Sent Via E-Mail

Robert C. Foster
Wood Environmental & Infrastructure Solutions, Inc.
2801 Yorkmont Road, Suite 100
Charlotte, North Carolina 28208
[e-mail]

Subject: Work Plan for Groundwater Sampling Approval
Electrical Apparatus & Machine Company
308 West Carson Boulevard, 1115 & 1127 South Mint Street, 308 West Palmer Street
Charlotte, Mecklenburg County
Brownfields Project Number 23088-19-060

Dear Mr. Foster,
The Department of Environmental Quality (DEQ) Brownfields Program received the Work Plan
for Goundwater Sampling and Analysis dated May 21, 2020 for the above referenced
Brownfields Property. DEQ Brownfields reviewed this document and approves the work plan.

Please be advised that this approval from DEQ Brownfields does not waive any applicable
requirement to obtain any necessary permits, licenses or certifications which may be required from
other state or local entities. If you have questions about this correspondence or require additional
information, please feel free to contact me by phone at 704/661-0330 or by email at
[e-mail]

Sincerely,

Carolyn Mininch
Brownfields Project Manager

ec: Fish, Jason [e-mail]
Franchina, David A. [e-mail]
Wood Environment & Infrastructure Solutions, Inc.
2801 Yorkmont Road, Suite 100
Charlotte, North Carolina 28208
Licensures: NC Engineering F-1253, Geology C-247
T: 704-357-8600
www.woodplc.com

‘Wood’ is a trading name for John Wood Group PLC and its subsidiaries

May 21, 2020

Ms. Carolyn Minnich, Brownfields Project Manager
North Carolina Department of Environmental Quality
Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Subject: Work Plan for Groundwater Sampling and Analysis
Electrical Apparatus & Machine Company
308 W. Palmer Street, 308 W. Carson Boulevard and 1115
and 1127 S. Mint Street
Charlotte, North Carolina
Brownfields Project Number 23088-19-060
Wood Project No: 6228-19-0534
Dear Ms. Minnich:
Wood Environment & Infrastructure Solutions, Inc. (Wood) is pleased to submit this Work Plan
outlining activities proposed for the above-referenced site. Included in this Work Plan is an
outline of our understanding of the project information, our proposed scope of services and
schedule.
PROJECT INFORMATION
The entire site consists of one tax parcel (Tax ID 073-064-26) totaling 2.264 acres (Figure 1).
The site is located in a mixed use area within the Gold District section of South End near uptown
Charlotte, North Carolina. Golden Nugget Associates, LLC, an entity of Spectrum Development
Company, LLC (Spectrum) plans to redevelop the subject property. In 2019, Wood completed a
Phase I Environmental Assessment (ESA) for the subject parcels. The assessment revealed
evidence of recognized environmental conditions (RECs) in connection with the site including the
following.
Work Plan for Groundwater Sampling and Analysis May 21, 2020
Wood Project: 6228-19-0534
2

 Occupation of the site by owners/tenants involved in industrial activities such as
cleaning, textile manufacturing, printing, and a machine shop is considered to be a REC;
 The identified automotive facilities on the upgradient or cross gradient properties
located at 309 and 321 West Palmer Street and 1201 South Mint Street have the
potential to negatively affect the site;
 The documentation of non-compliance and enforcement actions at the Electrical
Apparatus portion of the site is considered a REC.

Subsequently, Wood performed sampling and analysis of soil, soil-gas and groundwater at 308
W. Palmer Street and 308 W. Carson Boulevard. The second phase of assessment included
sampling and analysis of soil, soil-gas and groundwater at the parcels associated with addresses
1115 and 1127 S. Mint Street and 308 W. Carson Boulevard. The results of the sampling and
analysis are summarized as follows:
 The metals concentrations identified in the soil samples are within the range of
“naturally-occurring” metals for soils according to published literature. Hexavalent
chromium was identified in sample SB-5 at a concentration that slightly exceeded the
Residential Preliminary Soil Remediation Goals (PSRGs).

 The concentrations of Tetrachloroethylene (PCE) identified in soil-gas samples SG-1 and
SG-2 and the concentrations of 1,3-butadiene in soil-gas samples SG-1, SG-3 and SG-4
exceeded their respective NCDEQ Residential Soil-Gas Vapor Intrusion Screening Levels
(VISL). Therefore, the data suggests that there is potential for vapor intrusion into
structures, particularly in the area of the Electrical Apparatus and Machine Company.

 Most notably, carbon tetrachloride was identified in two groundwater samples (MW-1
and MW-2). Carbon tetrachloride is a chlorinated organic solvent. It was formerly widely
used in fire extinguishers, as a precursor to refrigerants and as a cleaning agent, but has
since been phased out because of toxicity and safety concerns. The historic groundwater
analytical results are shown on Table 1.
Demolition of the existing structures is presently underway. Three monitoring wells (MW-1, MW-
2 and MW-3) remain at the property. These wells were installed by Wood in 2019. It is likely that
the monitoring wells will be lost or destroyed during demolition. Therefore, the North Carolina
Department of Environmental Quality (NCDEQ), Division of Waste Management (DWM),
Brownfields Program (BFP), requested that additional groundwater samples be collected from
the wells prior to abandonment of the wells by a driller licensed in the State of North Carolina.
The purpose of the resampling is to verify consistent data relative to the initial sampling event
(July 2019). The proposed assessment activities will be performed in general accordance with the
most recent Inactive Hazardous Sites Branch (IHSB) Program Guidelines for Assessment and
Work Plan for Groundwater Sampling and Analysis May 21, 2020
Wood Project: 6228-19-0534
3

Cleanup dated January 2020
(https://files.nc.gov/ncdeq/Waste%20Management/DWM/SF/IHS/guidance/IHSB_RemediationG
uidance012720.pdf) and the most recent versions of the U.S. Environmental Protection Agency
(EPA) Region IV Science and Ecosystem Support Division (SESD) Field Branches Quality System
and Technical Procedures guidance.
PROPOSED SCOPE OF WORK
Task 1 – Groundwater Sampling and Analysis
Wood proposes the collection of groundwater samples from existing monitoring wells MW-1,
MW-2 and MW-3 (Figure 2). Wood will collect a sample of groundwater from each well using
low-flow purging techniques, to the extent possible, in general accordance with the
Environmental Protection Agency (EPA) Region IV Science and Ecosystem Support Division
(SESD) Field Branches Quality System and Technical Procedures guidance. During purging,
groundwater field parameters will be collected using an YSI ProPlus water quality meter with
commercially-manufactured flow cell and an HFS MicroTPI turbidity meter. Groundwater field
parameters to be collected through the flow cell include pH, specific conductivity, dissolved
oxygen, temperature and oxidation reduction potential. Turbidity measurements will be
collected prior to the groundwater entering the flow cell. When the parameter readings have
stabilized to within 10 percent, groundwater samples will be collected. The collected
groundwater samples will be placed in laboratory-provided containers. The groundwater
samples will be labeled with a unique ID and placed in an ice-filled sample cooler and delivered
by courier to a laboratory certified in the State of North Carolina for analysis. The samples will be
maintained under chain-of-custody protocol. The groundwater samples will be submitted for
laboratory analysis of volatile organic compounds (VOCs) by EPA Method 8260D, semi-volatile
organic compounds (SVOCs) by EPA Method 8270E, RCRA Metals (total) by EPA Method
6020B/7470A. One field duplicate QA/QC sample is proposed for VOCs, SVOCs and RCRA
Metals (total), as well as a trip blank for VOCs analysis.
Development/purge water generated during these activities will be spread on the ground
surface at the property.
Following completion of the groundwater sampling event, Wood will retain a driller licensed in
the State of North Carolina to abandon the monitoring wells at the property. The driller will
abandon the wells in accordance with Mecklenburg County Well Abandonment regulations and
Work Plan for Groundwater Sampling and Analysis May 21, 2020
Wood Project: 6228-19-0534
4

provide a completed abandonment record (referencing the current Subsurface Investigation
Permit (SIP)) to Wood. Wood will forward the records to Mecklenburg County.
Task 2 – Reporting
Wood will prepare a written Groundwater Sampling and Analysis Report relative to the work
scope described in Task 1. This report will include a description of field activities, tabulated data
in comparison to applicable screening levels, and the laboratory data packet with applicable
Level II QA/QC documentation with “j flags” reported. A site plan with the well location,
locations of sample points, and concentration map(s) for contaminants detected above
applicable standards will be provided. Sample points may need to be included on the future
Brownfields plat. For this reason, the NCDEQ recommends location of sample locations using a
GPS device at the time of collection for use in preparation of the Brownfields plat. The report will
be signed and sealed by a geologist licensed in the State of North Carolina and submitted to the
BFP for their use.
CLOSING
Wood is available at your convenience to discuss the contents of this work plan or other aspects
of the project.
Sincerely,
Wood Environment & Infrastructure Solutions, Inc.

Andrew J. Frantz, R.E.M. Robert C. Foster, LG
Senior Scientist Associate Geologist
Registered, NC #1335

Enclosure

Cc: Mr. Jason Fish, Golden Nugget Associates, LLC, c/o Spectrum Development Company, LLC

Work Plan for Groundwater Sampling and Analysis May 21, 2020
Wood Project: 6228-19-0534

TABLE

Constituent TMW-1 MW-1 MW-2 MW-3NC 2L Standards/ IMACsResidential GWSLsNon-Residential GWSLsAcetone 8.5 J <50 <50 <50 6,000 4,500,000 19,000,000Benzene <1.0 <1.0 <1.0 <1.0 1 16 69Carbon Tetrachloride <5.00.87 J 0.95 J<5.0 0.3 4.1 18Chloroform 1.1 J 1.8 J 1.4 J 0.36 J 70 8.1 36Chloromethane <2.0 1.6 J <2.0 <2.0 3 52 2201,4-Dichlorobenzene 0.58 J <1.0 <1.0 <1.0 6 26 1101,1-Dichloroethane 0.70 J <1.0 <1.0 <1.0 6 76 3301,2-Dichloroethane <1.0 <1.0 <1.0 <1.0 0.4 22 98Ethylbenzene <1.0 <1.0 <1.0 <1.0 600 35 150Methyl tert-Butyl Ether (MTBE) 0.66 J <1.0 <1.0 <1.0 20 4,500 20,000Naphthalene <2.0 <2.0 <2.0 <2.0 6 35 150n-Propylbenzene <1.0 <1.0 <1.0 <1.0 70 490 2,000Tetrachloroethylene <1.0 <1.0 <1.0 <1.0 0.7 12 48Trichloroethylene <1.0 <1.0 <1.0 <1.0 3 1.0 4.4Toluene 0.38 J <1.0 <1.0 <1.0 600 3,800 16,0001,2,4-Trimethylbenzene <1.0 <1.0 <1.0 <1.0 400 50 2101,3,5-Trimethylbenzene <1.0 <1.0 <1.0 <1.0 400 35 150Xylenes, total 0.77 J <2.0 <2.0 <2.0 500 77 320Benzo(a)anthracene <0.059 <0.050 <0.050 <0.050 0.05 340 4,200Benzo(a)pyrene <0.12 <0.10 <0.10 <0.10 0.005 NSL NSLFluorene <1.2 <1.0 <1.0 <1.0 300 NSL NSL1-Methylnaphthalene <5.9 <5.0 <5.0 <5.0 1 NSL NSL2-Methylnaphthalene<1.2 <1.0 <1.0 <1.030 NSL NSLNaphthalene<1.2 <1.0 <1.0 <1.06 35 150Phenanthrene <0.059 <0.050 <0.050 0.041 J 200 NSL NSLPyrene <1.2 <1.0 <1.0 <1.0 200 NSL NSLNotes:Prepared By/Date: DRH 8/8/191. Concentrations shown in micrograms per liter (µg/L).Checked By/Date: RPD 8/8/192. Sample TMW-1 collected on June 7, 2019. Samples MW-1, MW-2 and MW-3 collected on July 29, 2019.3. Samples analyzed for VOCs, SVOCS and Metals via EPA Method 8260 and 8270, only detections above laboratory reporting limits are shown.4. NC 2L Standards = North Carolina Administrative Code, Title 15A, Subchapter 2L, Section .0202, Groundwater Quality Standards, dated April 2013.5. GWSLs = NCDEQ Division of Waste Management, Vapor Intrusion Groundwater Screening Levels, dated February 2018.6. Bold values exceeded NC 2L Standards.7. Shaded values exceeded Residential GWSLs.8. Underlined values exceeded Non-Residential GWSLs.9. NSL = No Standard Listed.10. J = Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.11. NA = Not Analyzed.12. IMACs = North Carolina Administrative Code, Title 15A, Subchapter 2L, Section 0.0202, Interim Maximum Allowable Concentrations, dated April 2018.Charlotte, North CarolinaTable 1: Summary of Detected Constituents in Groundwater Semi-Volatile Organic CompoundsVolatile Organic CompoundsWood Project: 6228-19-0534Electrical Apparatus & Machine CompanyBrownfield Project: 23088-19-060
Work Plan for Groundwater Sampling and Analysis May 21, 2020
Wood Project: 6228-19-0534

FIGURES
Copyright:© 2013 National Geographic Society, i-cubed
PROJECT NO.:FIGURE NO.:
SITE TOPOElectrical Apparatus & Machine Company 308 West Carson Boulevard, 1115 & 1127 South Mint Street and 308 West Palmer Street Charlotte, North CarolinaBrownfields Project No.: 23088-19-060
6228-19-0534 1
0 1,000 2,000500
Feet
Site Boundary
Document Path: F:\AMEC_Projects\2020\Carsonandmint\MXD\Figure1.mxd User Name: leanna.muroski Date Saved: 4/30/2020 Checked By: RCF 4/30/2020
LEGEND
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720
S Mint StW Carso
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07306426
07306428
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07306429
PREPARED BY: LMMDATE: 7/30/2019 DATE: 7/30/2019CHECKED BY: RF PROJECT NO.:FIGURE NO.:
SAMPLE LOCATIONSCarson, Mint and Palmer Gold District Parcels 308 West Carson Boulevard, 1115 & 1127 South Mint Street and 308 West Palmer Street Charlotte, North Carolina
6228-19-0534
0 60 12030Feet
¯
1127
1115
308
308
073-064-02
!
P
A!
!Approximate Location of Soil Boring/Soil-Gas Sample (June 2019)
P Approximate Location of Soil Boring/Soil-Gas (June 2019)Sample/Temporary Monitoring Well
A! Approximate Location of "Background" Metals Soil Boring (June 2019)
SB-2/SG-2
SB-1/SG-1/TMW-1
SB-BG
Parcels Site Boundary
Contours (ft)
Service Layer Credits: Mecklenburg County GIS 2019
SG-3SB-3MW-3
SG-5SB-5MW-2
SG-4SB-4MW-1
SB-6
!Location of soil boring/soil-gas point/monitoring well (July 2019)
S Mint StW
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PREPARED BY: LMMDATE: 5/7/2020 DATE: 5/7/2020CHECKED BY: RF PROJECT NO.:FIGURE NO.:
GROUNDWATER CONTOUR MAP (MAY 7, 2020)Electrical Apparatus & Machine Company 308 West Carson Boulevard, 1115 & 1127 South Mint Street and 308 West Palmer Street Charlotte, North CarolinaBrownfields Project No.: 23088-19-060
6228-19-0534
0 70 14035
Feet
Service Layer Credits: Mecklenburg County GIS 2019
MW-3
715.43
MW-2
715.91
MW-1
716.71
716
716716.5
0
716.50Estimated groundwater flow direciton
Groundwater contour (feet)
Location of Monitoring Well
Groundwater elevation (feet)
relative to assumed top of casing elevation
(MW-1) of 730.00 feet above
mean sea level (amsl)
(715.43)
Site BoundaryParcels