24003 North Davidson II Evaluation of Solvent-Impacted Groundwater 20200603

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The existing building on the southeastern parcel was constructed in 1950 and was utilized as an
electrical appliance warehouse, a knit goods manufacturing facility, and a cork and insulation
warehouse in the 1950s. Subsequently, the building appears to have been occupied by various
warehouse facilities until the 1990s, when a previous owner renovated the building for use as an
event venue. The northern portion of the building was also utilized as a brewery in the 2010s.

The northwestern parcel was developed with a concrete plant and an automotive repair shop in the
early to mid-1950s. The concrete plant operated until the late 1950s, and the automotive repair
shop operated until at least the late 1960s. Additional buildings, including the existing warehouse,
were constructed on the northwestern parcel in the 1950s and 1960s. The buildings appear to have
been used as part of lumber company, automotive scrapyard, automotive repair, automotive body
shop, and warehouse operations. Between the 1970s and the early 2000s, several structures on the
northwestern parcel were razed.

During July 2019 Phase I Environmental Site Assessment (ESA) activities at the Site, H&H
identified several Recognized Environmental Conditions (RECs) in connection with historical uses
of the Site and historical uses/documented groundwater impacts on adjacent properties. In
addition, five monitoring wells were observed on-Site; however, groundwater data for the wells
were not available. Based on review of Mecklenburg County Land Use and Environmental
Services Agency (LUESA) online records, the monitoring wells were installed by Summit
Engineering in April 2016.

In August and November 2019, H&H performed sub-slab vapor and indoor air sampling as part
of due diligence activities. Analytical data indicated the presence of trichloroethene (TCE) in one
sub-slab vapor sample at a concentration above the North Carolina Department of Environmental
Quality (DEQ) Non-Residential Sub-Slab and Exterior Soil Gas Screening Level (SGSL). No
additional compounds were detected at concentrations above the Non-Residential SGSLs, and no
compounds were detected in indoor air samples at concentrations above the DEQ Residential or
Non-Residential Indoor Air Screening Levels (IASLs).

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H&H also conducted soil and groundwater sampling activities in March 2020 to further evaluate
environmental conditions at the Site and to address potential data gaps. Groundwater data
indicated the presence of the gasoline-related volatile organic compound (VOC) methyl tert-butyl
ether (MTBE) in monitoring well MW-3 and chromium in monitoring well MW-4 at
concentrations above the North Carolina 2L Groundwater Standards (2L Standards). The detected
MTBE concentration is below the DEQ Residential and Non-Residential Vapor Intrusion
Groundwater Screening Levels (GWSLs). Refer to Section 2.0 below for a detailed summary of
assessment data that is pertinent to this evaluation.

A Letter of Eligibility to participate in the Brownfields Program was issued by DEQ on
March 27, 2020, and a kick-off/data gap meeting was held with H&H, the PD, the PD’s legal
counsel, and DEQ Brownfields Program personnel on May 22, 2020. During the data gap meeting,
DEQ requested that H&H provide a formal evaluation of potential sources of groundwater impacts
on the Site. Based on the results of sub-slab vapor and indoor air sampling at the Site, the detection
of MTBE in groundwater at a concentration that is well below the GWSLs, the non-volatile nature
of chromium, and the anticipated groundwater use restriction for the Site, the focus of this
evaluation is TCE.

A summary of prior off-Site groundwater assessment at the nearby Applied Research Group, Inc.
(ARGI; 2221 N. Davidson Street) and Gibbs Electroplating (2229 N. Davidson Street) facilities
and on-Site groundwater and vapor intrusion assessment is provided below in Section 2.0. A
summary of on-Site observations during a Phase I ESA Site visit is provided in Appendix 3.0.

2.0 Data Evaluation

2.1 Off-Site Groundwater Assessment
H&H reviewed a Proposed Groundwater Monitoring Reduction Plan prepared by Groundwater &
Environmental Services of North Carolina, Inc. (GES) dated December 15, 2004. According to
the report, the former ARGI facility (approximately 150 ft south-southwest of the Site) was a
chromated copper arsenate (CCA) formulation plant, and the Gibbs Electroplating facility
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(adjacent to the south-southwest of the Site) performed electroplating and other metal finishing
operations. Groundwater analytical data indicate that releases of hazardous materials may have
occurred at both facilities. However, GES reported that the formulation of CCA did not require
the use of trichloroethene (TCE); therefore, GES attributed the chlorinated solvent impacts
identified at the ARGI property to former Gibbs Electroplating operations.

Based on the information provided above, H&H performed further file review regarding the Gibbs
Electroplating facility. According to a September 2000 memorandum prepared by Keith Snavely
of the DEQ Inactive Hazardous Sites Branch (IHSB), Gibbs Electroplating was added to the
Inactive Hazardous Sites Inventory after DEQ determined that Gibbs Electroplating was the most
likely source of hexavalent chromium- and chlorinated solvent-related groundwater impacts at the
ARGI property. Based on our review of DEQ records, it does not appear that environmental
assessment or remediation activities have been performed at the former Gibbs Electroplating
property.

The December 2004 GES report indicates that MW-7, MW-11, and MW-19 are the three closest
monitoring wells to the former Gibbs Electroplating property and are located approximately 60 to
75 ft north-northwest and downgradient of the facility. In April 2004, TCE was detected in wells
MW-7, MW-11, and MW-19 at concentrations of 980 µg/L, 7,800 µg/L, and 5,400 µg/L,
respectively, which exceed the 2L Standard of 3.0 µg/L. April 2004 TCE detections in select off-
Site monitoring wells are depicted on Figure 3.

Based on groundwater elevation data presented on Figure 4 of the GES report, groundwater flow
at the likely source property (former Gibbs Electroplating) is predominantly to the northwest
towards MW-7, MW-11, MW-19, and the subject Site.

Copies of the December 2004 GES report and the September 2000 DEQ memorandum are
provided in Appendix A.

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2.2 On-Site Groundwater and Sub-Slab Vapor Assessment

Groundwater
On March 5 and 6, 2020, H&H collected samples from five monitoring wells (MW-1 through
MW-5) that were installed at the Site in April 2016 by Summit Engineering. Laboratory analytical
results indicate that TCE was detected in samples MW-3 (110 µg/L) and MW-4 (669 µg/L) at
concentrations above the 2L Standard of 3.0 µg/L. The sample with the highest detection of TCE
(MW-4) is located approximately 120 ft north and downgradient of the former Gibbs
Electroplating property. TCE was not detected above the laboratory method detection limits
(MDLs) in the furthest downgradient samples (MW-1 and MW-2); therefore, there does not appear
to be a source of TCE in the central or northern portions of the Site. TCE was also not detected
above the MDL in the furthest upgradient sample (MW-5); therefore, it does not appear that TCE
has migrated in groundwater from properties across N. Davidson Street. PCE, the parent
compound of TCE, was not detected above the MDLs in samples MW-1 through MW-5.
Groundwater analytical data for samples MW-1 through MW-5 is presented in Table 1. March
2020 TCE data for on-Site monitoring wells are depicted on Figure 3.

Based on groundwater elevation data collected for on-Site monitoring wells in March 2020,
groundwater flow at the Site is predominantly to the northwest and northeast towards Little Sugar
Creek and an unnamed tributary of Little Sugar Creek, respectively. On-Site groundwater
elevation data indicate that groundwater from the Gibbs Electroplating property is likely migrating
onto the Site and beneath a portion of the building at 2315 N. Davidson Street. A groundwater
elevation contour map is provided as Figure 4.

No groundwater samples have been collected within the Site building at 2315 N. Davidson Street,
which is upgradient of the on-Site TCE-impacted groundwater. However, sub-slab vapor sampling
was performed within the building as part of due diligence activities and is summarized below.

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Sub-Slab Vapor
In August 2019, H&H collected sub-slab vapor samples SS-1 through SS-4 within the building at
2315 N. Davidson Street, and samples SS-5 and SS-6 were collected within the building at 421 E.
26th Street.

TCE (91,000 μg/m3) was detected in sub-slab vapor sample SS-1 (west-central portion of 2315 N.
Davidson Street building) at a concentration above the Non-Residential SGSL of 180 μg/m3. TCE
(27 μg/m3) was detected in sub-slab vapor sample SS-2 (south-central portion of 2315 N. Davidson
Street building) above the Residential SGSL of 14 μg/m3. PCE (860 μg/m3) was also detected in
sample SS-1 above the Residential SGSL of 280 μg/m3. No volatile organic compounds (VOCs)
were detected above the Residential or Non-Residential SGSLs in sub-slab vapor samples
collected in the northern or eastern portions of the building at 2315 N. Davidson Street or in
samples collected at 421 E. 26th Street. Sub-slab vapor data are summarized in Table 2, and sub-
slab PCE and TCE data are depicted on Figure 5.

Sub-slab vapor data indicate that the source of TCE and PCE vapors beneath the Site buildings is
likely solvent-impacted groundwater that has migrated across E. 26th Street from the former Gibbs
Electroplating property. The low-level PCE and/or TCE detections in samples SS-3, SS-5, and
SS-6 and the lack of PCE or TCE detections in sample SS-4 do not indicate an obvious on-Site
source within the buildings.

3.0 Phase I ESA Site Reconnaissance

To evaluate potential sources or releases of hazardous materials at the Site, H&H performed a Site
visit as part of Phase I ESA activities in July 2019. During Site reconnaissance, H&H observed
de minimis quantities of primarily paints, cleaning products, and other building maintenance-
related chemicals in the buildings. No obvious evidence of bulk chemical storage or use of
chlorinated solvents was observed. Several floor drains were observed in the building at 2315 N.
Davidson Street; however, the drains appear to have been installed for use by a former event venue
and a former brewery. No obvious evidence of industrial floor drains, sumps, or pits was observed,
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and none were reported to exist by the former Site owner. H&H did not observe staining or other
obvious evidence of a release of hazardous materials during our reconnaissance of the Site.

4.0 Summary and Conclusions
Based on the direction of groundwater flow at the Site and adjacent properties, prior groundwater
analytical data for the Site and properties to the south-southwest of the Site, prior sub-slab vapor
data for the Site, and observations during a Phase I ESA Site visit, it appears that chlorinated
solvent-related groundwater and sub-slab vapor impacts at the Site are related to one or more
sources located south-southwest of the Site (across E. 26th Street). As such, no on-Site source
assessment is warranted to evaluate chlorinated solvents in soil or groundwater. Furthermore, deed
restrictions that are anticipated in the pending Brownfields Agreement will protect future users of
the Site from exposure to on-Site contaminants.

Please contact me if you have any questions or require additional information.
Sincerely,
Hart & Hickman, PC

Bo Cappleman, PG Due Diligence Manager
cc: Mr. Paul Kardous, Mill District Partners LLC (via email) Mr. Chris Walker, Alexander Ricks PLLC (via email)
Attachments:
Table 1 – Summary of Groundwater Analytical Results Table 2 – Summary of Sub-Slab Analytical Data Figure 1 – Site Location Map
Figure 2 – Site Map
Figure 3 – Groundwater Sample Locations and TCE Detections Figure 4 – Groundwater Elevation Contour Map Figure 5 – Sub-Slab Vapor Concentrations Map Appendix A – Proposed Groundwater Monitoring Reduction Plan (December 15, 2004)
DEQ IHSB Memorandum (September 12, 2000)
Table 1
Summary of Groundwater Analytical Results
North Davidson II Brownfields Property
2351 N. Davidson Street and 421 E. 26th Street
Charlotte, North Carolina
H&H Job No. PAM-003
Sample ID MW-1 MW-2 MW-DUP-1 MW-3 MW-4 MW-5
Date 3/5/2020 3/5/2020 3/5/2020 3/6/2020
Area of Potential Concern Former Lumber
Shed
Former Junkyard
Area
Former Auto Repair
Shop
Upgradient Portion
of Site
VOCs (8260D)
Chloroform <2.3 <2.3 <2.3 <11.7 <11.7 3.0J 70 8.1 36<0.29 <0.29 <0.29 2.2J <1.5 <0.29 70 NS NS<0.22 <0.22 <0.22 12.8 <1.1 <0.22 70 1,400 5,900
<0.28 <0.28 <0.28 636 <1.4 <0.28 20 4,500 20,000
<0.22 <0.22 <0.22 110 669 <0.22 3.0 1.0 4.4
SVOCs (8270E)------
RCRA Metals (6020B, 7470A)
0.395J 0.631J <0.250 0.403J 0.901J <0.250 10 ----
NA <0.250 <0.250 <0.250 NA NA 10 ----
92.0 77.0 22.4 28.9 35.3 78.6 700 ----
NA 22.5 22.5 29.6 NA NA 700 ----
<0.160 <0.160 <0.160 0.424J <0.160 <0.160 2.0 ----
NA <0.160 <0.160 <0.160 NA NA 2.0 ----
1.15J 17.8 1.01J 13.5 394 2.35 10 ----
NA 0.689J 0.738J 1.01J NA NA 10 ----
0.970J 2.02 0.482J 1.01J 0.745J 1.21J 15 ----
NA <0.240 0.284J <0.240 NA NA 15 ----
<0.380 <0.380 <0.380 0.415J 1.33J <0.380 20 ----
NA <0.380 <0.380 <0.380 NA NA 20 ----
<0.310 <0.310 <0.310 <0.310 <0.310 <0.310 20 ----
NA <0.310 <0.310 <0.310 NA NA 20 ----
<0.0490 <0.0490 <0.0490 <0.0490 <0.0490 <0.0490 1.0 0.18 0.75
NA <0.0490 <0.0490 <0.0490 NA NA 1.0 0.18 0.75
Notes:
1) North Carolina Department of Environmental Quality (DEQ) 15A NCAC 02L.0202 Groundwater Standards (2L Standards) (April 2013)
2) NC DEQ Division of Waste Management (DWM) Residential Vapor Intrusion Groundwater Screening Levels (GWSLs) (February 2018)
3) NC DEQ DWM Non-Residential Vapor Intrusion GWSLs (February 2018)
With the exception of metals, only constituents detected in at least one sample are shown.Concentrations are reported in micrograms per liter (µg/L).
Compound concentrations are reported to the laboratory method detection limits
Laboratory analytical methods are shown in parentheses.Bold concentrations exceed the DEQ 2L Standard.Underlined concentrations exceed the DEQ 2L Standard and the Non-Residential GWSL.
VOCs = volatile organic compounds; SVOCs = semi-volatile organic compounds, RCRA = Resource Conservation and Recovery Act
NA = not analyzed; NS = not specified; -- = not applicable
J = estimated value between the laboratory method detection limit and the laboratory reporting limit
All Below Laboratory Method Detection Limits
NC 2L
Groundwater
Standards (1)
Residential
GWSL(2)
Non-Residential
GWSL(3)
3/6/2020
Former Junkyard Area
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Table 1
Hart & Hickman, PC
Table 2
Summary of Sub-Slab Vapor Analytical Data
North Davidson II Brownfields Property
2315 N. Davidson Street and 421 E. 26th Street
Charlotte, North Carolina
H&H Job No. PAM-003
Sample IDSample LocationSample DateAnalytical MethodAcetoneBenzene2-Butanone (MEK)Carbon DisulfideChloroformCarbon TetrachlorideDichlorodifluoromethane (Freon 12)EthanolEthyl AcetateEthylbenzene4-EthyltolueneHeptaneHexaneIsopropanolMethylene ChlorideNaphthalenePropeneTetrachloroetheneTolueneTrichloroetheneTrichlorofluoromethane (Freon 11)1,2,4-Trimethylbenzene1,3,5-Trimethylbenzenem&p-Xyleneo-XyleneSS-1 8/8/2019 100 J <2.6 <9.2 <4.3 260 <4.1 <4.3 120 J <5.4 <5.0 <6.0 <4.8 <12 <6.0 <8.4 <8.0 <3.4 860 <3.9 91,000 <6.5 <6.3 <6.2 <10 <5.4
SS-2 8/8/2019 120 0.50 J 7.2 J <0.43 1.9 0.63 J 2.5 130 <0.54 <0.50 <0.60 <0.48 <1.2 5.4 J <0.84 0.86 J <0.34 19 0.89 27 2.0 J <0.63 <0.62 <1.0 <0.54
SS-3 220 0.33 J 5.7 J 4.3 J 1.3 <0.41 <0.43 130 <0.54 <0.50 <0.60 <0.48 <1.2 16 J <0.84 <0.80 <0.34 3.2 0.65 J <0.43 1.9 J <0.63 <0.62 <1.0 <0.54
DUP-2/SS-3 230 0.42 J 7.5 J 5.3 J <0.36 <0.41 2.3 110 <0.54 <0.50 <0.60 <0.48 <1.2 11 J <0.84 0.86 J <0.34 3.1 0.83 <0.43 1.9 J <0.63 <0.62 <1.0 <0.54
SS-4 8/8/2019 260 1.3 9.5 J 25 <0.36 <0.41 2.9 110 1.3 2.2 2.4 <0.48 <1.2 12 J 0.85 J 0.94 J 17 <0.75 3.2 <0.43 1.0 J 14 8.9 8.9 3.6
SS-5 8/8/2019 72 1.1 10 J 8.6 <0.36 <0.41 2.8 51 <0.54 0.94 <0.60 2.6 6.1 J 9.4 J <0.84 1.7 <0.34 7.4 4.2 1.2 3.2 J 2.6 1.4 3.4 1.5
SS-6 8/8/2019 56 0.87 6.9 J 20 <0.36 <0.41 2.7 51 <0.54 0.64 J <0.60 <0.48 <1.2 6.7 J <0.84 1.7 <0.34 8.4 3.4 6.1 2.7 J <0.63 <0.62 2.1 0.82 J
220,000 120 35,000 4,900 41 160 700 NS 490 370 NS 2,800 4,900 1,400 4,200 21 21,000 280 35,000 14 NS 420 420 700 700
2,700,000 1,600 440,000 61,000 530 2,000 8,800 NS 6,100 4,900 NS 35,000 61,000 18,000 53,000 260 260,000 3,500 440,000 180 NS 5,300 5,300 8,800 8,800
Notes:
1) North Carolina Department of Environment Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018)
2) North Carlolina DEQ DWM Non-Residential SGSLs (February 2018)
Bold values exceeds the NCDEQ DWM Residential SGSL.
Bold and Underlined value exceeds the NCDEQ DWM Residential and Non-Residential SGSL.
Compound concentrations are reported to the laboratory detection limits.
Compound concentrations are reported in micrograms per cubic meter (µg/m3).
J = estimated concentration between the laboratory method detection limit and the laboratory reporting limit
NS = Not Specified
DWM Residential SGSL (1)
DWM Non-Residential SGSL (2)
8/8/2019
TO-15
2315 N. Davidson Street
421 E. 26th Street
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Table 2
Hart & Hickman, PC
0 2000 4000
APPROXIMATE
SCALE IN FEETN
U.S.G.S. QUADRANGLE MAP
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
CHARLOTTE EAST, NORTH CAROLINA 1991
TITLE
PROJECT
SITE LOCATION MAP
NORTH DAVIDSON II BROWNFIELDS PROPERTY2315 N. DAVIDSON STREET & 421 E. 26TH STREETCHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE:
5-18-20 0
1PAM-003
SITE
LITTLE SUGAR CREEKREVISION NO. 0
JOB NO. PAM-003
DATE: 5-28-20
FIGURE NO. 2
NORTH DAVIDSON II BROWNFIELDS PROPERTY
2315 N. DAVIDSON STREET & 421 E. 26TH STREETCHARLOTTE, NORTH CAROLINA
SITE MAP
LEGEND
SITE PROPERTY BOUNDARY
FORMER RAIL SPUR
SURFACE WATER
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 GeologyLYNX
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NODA APPLIANCEWAREHOUSE
FIVE RINGSSTRENGTH &
CONDITIONING
FORMERLUMBERSHED
APPROXIMATELOCATION OFFORMER AUTOREPAIR SHOP
FORMERMUNDETCORKCORP.
FORMERLAWRENCEKNITTINGMILLS
VACANT SUITE /
FORMER BREWERY
N. B
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NOTES:
1. AERIAL IMAGERY OBTAINED FROM MECKLENBURGCOUNTY GIS (2019).
NODA SELF STORAGE
(FORMER U.S. TEXTILE CORP.)
(2401 N. DAVIDSON STREET)
YANDLE METAL SHOP
(2414 N. DAVIDSON STREET)
YANDLE METAL SHOP(FORMER GENERAL LATEX &
CHEMICAL CORP.)
(2414 N. DAVIDSON STREET)
COLLECTIVE APARTMENT COMPLEX(FORMER R.H. BOULIGNY, INC.)(2300 N. DAVIDSON STREET)
NODA BREWING COMPANY(FORMER GIBBS ELECTROPLATING)(2229 N. DAVIDSON STREET)
PERFORMANCE LOGISTICS(511 E. 25TH STREET)
WOODTECH INTERIORS, INC(2228 N. BREVARD STREET)
SUPERIOR STONE OF THESOUTHEAST(2310 N. BREVARD STREET)
FORMER APPLIEDRESEARCH GROUP(2221 N. DAVIDSON STREET)
RHINO MARKET & DELI ANDFREE RANGE BREWING(2320 N. DAVIDSON STREET)
VACANT OFFICES AND
WAREHOUSE / FORMER
WALKER MARTIN, INC.ELECTRICAL APPLIANCEWAREHOUSE
\\hhfs01\MasterFiles\AAA-Master Projects\PAMAKA - PAM\PAM-003 N. Davidson & E. 26th\Brownfields Letter - May 2020\Figures\Site Map_R2.dwg, FIG 2, 5/28/2020 4:50:17 PM, SVincent
MW-1
MW-4
MW-3
MW-2
MW-5
MW-10
MW-11
MW-7MW-19
MW-16LITTLE SUGAR CREEKREVISION NO. 0
JOB NO. PAM-003
DATE: 5-28-20
FIGURE NO. 3
GROUNDWATER SAMPLE LOCATIONS
AND TCE DETECTIONS
LEGEND
SITE PROPERTY BOUNDARY
FORMER RAIL SPUR
SURFACE WATER
MONITORING WELL
ABANDONED / NOT LOCATED MONITORINGWELL
GENERALIZED GROUNDWATER FLOW
DIRECTION
TCE CONCENTRATION (µg/L)
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 GeologyLYNX
LI
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R
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N. D
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FORMER GIBBS ELECTROPLATING(2229 N. DAVIDSON STREET)
FORMER APPLIEDRESEARCH GROUP(2221 N. DAVIDSON STREET)
N. B
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T
(110)
(110)
(ND)
(ND)
(3,300)
(669)
(7,800)
(980)(5,400)
(600)
(ND)
NOTES:
1. MONITORING WELLS MW-1 THROUGH MW-5 WERE
INSTALLED IN APRIL 2016 BY SUMMIT ENGINEERING ANDSAMPLED BY H&H IN MARCH 2020.
2. MONITORING WELLS MW-7, MW-10, MW-11, MW-16, ANDMW-19 WERE INSTALLED BY OTHERS DURINGASSESSMENT OF THE FORMER APPLIED RESEARCHGROUP, INC. SITE AT 2221 N. DAVIDSON STREET.
3. TRICHOLORETHENE (TCE) DATA FOR MW-7, MW-10, MW-11,MW-16, AND MW-19 ARE FOR SAMPLES COLLECTED INAPRIL 2004 AND WERE OBTAINED FROM A PROPOSEDGROUNDWATER MONITORING REDUCTION PLAN (PGMRP)PREPARED BY GROUNDWATER & ENVIRONMENTALSERVICES OF NORTH CAROLINA, INC. (GES) DATEDDECEMBER 15, 2004.
4. TCE CONCENTRATIONS ARE REPORTED IN MICROGRAMS
PER LITER (µg/L).
5. GROUNDWATER FLOW DIRECTION IS INFERRED FROMAREA TOPOGRAPHY AND PRIOR GROUNDWATERELEVATION DATA OBTAINED FROM THE DECEMBER 2004PGMRP REPORT PREPARED BY GES.
6. ND = NOT DETECTED
NORTH DAVIDSON II BROWNFIELDS PROPERTY
2315 N. DAVIDSON STREET & 421 E. 26TH STREETCHARLOTTE, NORTH CAROLINA
\\hhfs01\MasterFiles\AAA-Master Projects\PAMAKA - PAM\PAM-003 N. Davidson & E. 26th\Brownfields Letter - May 2020\Figures\Site Map_R2.dwg, FIG 3, 5/28/2020 4:51:28 PM, SVincent
REVISION NO. 0
JOB NO. PAM-003
DATE: 5-14-20
FIGURE NO. 4
NORTH DAVIDSON II BROWNFIELDS PROPERTY
2315 N. DAVIDSON STREET & 421 E. 26TH STREET
CHARLOTTE, NORTH CAROLINA
GROUNDWATER ELEVATION CONTOUR MAP
LEGEND
SITE PROPERTY BOUNDARY
FORMER RAIL SPUR
SURFACE WATER
GROUNDWATER MONITORING WELL
GROUNDWATER ELEVATION (FT)
GROUNDWATER ELEVATION CONTOUR
(FT) DASHING INDICATES
EXTRAPOLATED CONTOUR
INFERRED GROUNDWATER FLOW
DIRECTION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 GeologyLYNX LIGHT RAILN. DAVIDSON STREETE. 2
6
T
H

S
T
R
E
E
T
JOR
D
A
N

P
L
A
C
E
N. BREVARD STREETNOTES:
1)MONITORING WELLS MW-1 THROUGH MW-5 WERE
INSTALLED IN APRIL 2016 BY SUMMIT ENGINEERING.
2)DEPTH TO GROUNDWATER MEASUREMENTS WERE
COLLECTED BY H&H ON MARCH 31, 2020.
3)ELEVATIONS WERE SURVEYED ON 3/31/2020 AND ARE
REFERENCED TO AN ARBITRARY DATUM OF 100.00 FT
AT MW-5 TOP OF CASING.
MW-5
MW-4
MW-3
MW-2
MW-1
85
87
89
83
81
79
878583817977
897781
(78.92)
(85.81)
(89.12)
(77.03)
(78.22)
(78.92)S:\AAA-Master Projects\PAMAKA - PAM\PAM-003 N. Davidson & E. 26th\Phase II ESA\March 2020 Assessment\Figures\Site Map_R1.dwg, 5/14/2020 2:25:25 PM, amckenzieLITTLE SUGAR CREEK
SS-5
SS-6
SS-1
SS-3
SS-4
SS-2
SS-2
PCE 19
TCE 27
REVISION NO. 0
JOB NO. PAM-003
DATE: 5-28-20
FIGURE NO. 5
SUB-SLAB VAPOR CONCENTRATIONS MAP
LEGEND
SITE PROPERTY BOUNDARY
FORMER RAIL SPUR
SURFACE WATER
SUB-SLAB VAPOR SAMPLELOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 GeologyLYNX LIGHT RAILN. DAVIDSON STREETE.

2
6
T
H

S
T
R
E
E
T
JOR
D
A
N

P
L
A
C
E
RHINO MARKET & DELI /FREE RANGE BREWING(2320 N. DAVIDSON STREET)N. BREVARD STREETSS-6
PCE 8.4
TCE 6.1
SS-5
PCE 7.4
TCE 1.2
SS-1
PCE 860
TCE 91,000
SS-2
PCE 19
TCE 27
SS-3
PCE 3.2
TCE <0.43
SS-4
PCE <0.75
TCE <0.43
NOTES:
1. SUB-SLAB SAMPLES SS-1 THROUGH SS-6COLLECTED ON 8/7/19.
2. BOLD VALUES EXCEED NORTH CAROLINADEPARTMENT OF ENVIROMENTAL QUALITY (DEQ)DIVISION OF WASTE MANAGEMENT (DWM)RESIDENTIAL SUB-SLAB AND EXTERIOR SOIL GASSCREENING LEVELS (SGSLs) (FEBRUARY 2018)
3.BOLD AND UNDERLINED VALUE EXCEEDS THE DEQDWM NON-RESIDENTIAL SGSLs
4. PCE = TETRACHLOROETHYLENETCE = TRICHLOROETHYLENE
5. CONCENTRATIONS REPORTED IN MICROGRAMS PERCUBIC METER (µg/m3).
CONCENTRATION(µg/m3)
CONSTITUENT
SAMPLE ID
NORTH DAVIDSON II BROWNFIELDS PROPERTY
2315 N. DAVIDSON STREET & 421 E. 26TH STREETCHARLOTTE, NORTH CAROLINA
\\hhfs01\MasterFiles\AAA-Master Projects\PAMAKA - PAM\PAM-003 N. Davidson & E. 26th\Brownfields Letter - May 2020\Figures\Site Map_R2.dwg, FIG 4, 5/28/2020 4:52:14 PM, SVincentLITTLE SUGAR CREEK

Appendix A
DEQ Regulatory Documents
• Proposed Groundwater Monitoring Reduction Plan (December 15, 2004)
• DEQ IHSB Memorandum (September 12, 2000)