HomeMy WebLinkAbout24036 - Soil Gas Assessment Work Plan_E Cama Street
Via Email
April 30, 2021
NCDEQ – Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, NC 27699-1646
Attn: Ms. Carolyn Minnich
Re: Soil Gas Assessment Work Plan
East Cama Street
235 E. Cama Street
Charlotte, Mecklenburg County
Brownfields Project No. 24036-20-060
H&H Project No. BOU-016
Dear Carolyn:
On behalf of Boulevard at 235 E Cama, LLC, enclosed please find a copy of the Soil Gas
Assessment Work Plan prepared for the above referenced Site in Charlotte, Mecklenburg
County. As discussed, the Brownfields property is planned for redevelopment with residential
townhomes and the soil gas sampling activities described in the Work Plan are proposed to
establish baseline concentrations for compounds that may pose a potential vapor intrusion risk
into the proposed buildings.
If you have any questions or comments, please do not hesitate to contact me.
Sincerely,
Hart & Hickman, PC
Alexis McKenzie, EI Ralph McGee, PG
Project Engineer Project Manager
Enclosures
cc: Mr. Michael Bender, Boulevard Real Estate Advisors (via email)
Mr. Chris Branch, Boulevard Real Estate Advisors (via email)
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Soil Gas Assessment Work Plan
East Cama Street
235 E. Cama Street
Charlotte, North Carolina
Brownfields Project No. 24036-20-060
H&H Job No. BOU-016
Table of Contents
1.0 Introduction .............................................................................................................................1
1.1 Background ............................................................................................................................1
1.2 Previous Environmental Assessments ...................................................................................2
1.3 Brownfields Eligibility ..........................................................................................................4
2.0 Brownfields Assessment Activities ........................................................................................5
2.1 Soil Gas Sampling Activities .................................................................................................5
2.2 Quality Assurance – Quality Control ....................................................................................7
2.3 Investigation Derived Waste .................................................................................................8
2.4 Reporting ...............................................................................................................................9
List of Tables
Table 1 Summary of Soil Sample Analytical Data
Table 2 Summary of Groundwater Sample Analytical Data
Table 3 Sample Summary Table
List of Figures
Figure 1 Site Location Map
Figure 2 Site Map
Figure 3 Proposed Sample Location Map
List of Appendices
Appendix A Proposed Redevelopment Layout
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Soil Gas Assessment Work Plan
East Cama Street
235 E. Cama Street
Charlotte, North Carolina
Brownfields Project No. 24036-20-060
H&H Job No. BOU-016
1.0 Introduction
On behalf of Boulevard at 235 E Cama, LLC (Prospective Developer or PD), Hart & Hickman,
PC (H&H) has prepared this Work Plan to conduct soil gas assessment activities at the East
Cama Street Brownfields property (Brownfields Project No. 24036-20-060) located at 235 E.
Cama Street in Charlotte, Mecklenburg County, North Carolina (Site). A Site location map is
provided as Figure 1.
The Site consists of one approximately 0.56-acre parcel of land (Mecklenburg County Parcel ID
No. 14902301) that is developed with one approximately 2,100 square feet (sq ft) warehouse
building and one storage shed. The eastern portion of the Site including the storage shed
building was most recently occupied by an air conditioning repair business for storage of parts
and equipment, but is no longer occupied. The Site building is currently used as office and
storage space by the Site owner. The Site and surrounding area are depicted in Figure 2.
1.1 Background
The Site was developed with the current warehouse building in 1964 and used for automotive
repair operations until the late 1970s. In 1979, the Site was owned by Appling Builders and was
purchased in 1984 by the current owner for use as a construction materials supply company. In
recent years, the Site building has been used for band rehearsal and small-scale mechanical
repair projects. The eastern portion of the Site is currently unoccupied, but has been leased to
multiple tenants over the last approximately ten years including a tree removal company, an
automobile painting and repair businesses, and an air conditioning repair business.
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Nearby surrounding properties include an automotive repair shop across E. Cama Street to the
north, auto repair facilities located adjacent to the east, and residential and commercial use to the
south and west. A piped stream is located near the southern Site boundary that flows northwest
toward Irwin Creek.
1.2 Previous Environmental Assessments
Operations at the Site historically included an automotive repair shop from 1964 through 1979
and automotive painting and repair operations in the eastern portion of the Site for a short time in
recent decades. The Site warehouse building has historically been serviced by an on-Site septic
system. In addition to on-Site operations, nearby surrounding properties located topographically
upgradient of the Site have historically been occupied with light industrial facilities and auto
repair shops since at least the 1960s. Results of Phase I Environmental Site Assessment (ESA)
activities completed by H&H in April 2020 identified the potential for impact from historical
on-Site and nearby off-Site operations as an environmental concern in connection with the Site.
H&H completed Phase II ESA soil and groundwater sampling activities at the Site in May 2020
to evaluate the potential for impact from undocumented on-Site and nearby off-Site releases.
Previous assessment activities are documented in a Phase I and II ESA report prepared by H&H
dated July 2, 2020.
The Phase II ESA activities included collection of four (4) soil samples and three (3)
groundwater samples for laboratory analysis. Soil samples selected for laboratory analysis were
collected adjacent to the former automotive repair building (SB-1), within the septic drain field
(SB-2), adjacent to the septic tank (SB-3), and adjacent to the storage shed in the eastern portion
of the Site (SB-4). Groundwater samples were collected in the northeastern and topographically
upgradient portion of the Site to evaluate the potential migration of impacts onto the Site from
nearby off-Site properties (TMW-1), west and topographically downgradient of the Site building
(TMW-2), and in the southwestern and topographically downgradient portion of the Site
(TMW-3). The May 2020 soil and groundwater sample locations are shown in Figure 2.
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Soil sample laboratory analytical results indicate that no volatile organic compounds (VOCs),
semi-VOCs (SVOCs), or metals were detected at concentrations exceeding the North Carolina
Department of Environmental Quality (DEQ) Inactive Hazardous Sites Branch (IHSB)
Preliminary Soil Remediation Goals (PSRGs) near the former automotive repair building,
storage shed, or in connection with the septic tank and associated drain field. For ease of
reference, a tabular summary of the Phase II ESA soil sample laboratory analytical results is
provided as Table 1.
Laboratory analytical results for the groundwater sample collected in the upgradient portion of
the Site (TMW-1) indicated that several VOCs were detected at concentrations above the
laboratory method detection limits. A low level (1.9 microgram per liter {µg/L}) of
tetrachloroethene (PCE) was detected at a concentration above the DEQ 2L Groundwater Quality
Standard (2L Standard) of 0.7 µg/L, but below the DEQ Division of Waste Management (DWM)
Residential Vapor Intrusion Groundwater Screening Level (GWSL) of 12 µg/L. No other
compounds were detected at concentrations above the 2L Standards in the upgradient
groundwater sample. Permanent groundwater monitoring well MW-1 was subsequently installed
adjacent to the TMW-1 sample location on May 19, 2020 and groundwater samples were
collected for laboratory analysis to confirm the presence of PCE at concentrations above the 2L
Standard in the upgradient portion of the Site. Laboratory analytical results for the groundwater
sample collected from MW-1 indicate that PCE (4.3 µg/L) was detected at a concentration above
the 2L Standard and confirm the presence of impacts that are attributable to an unknown nearby
off-Site source.
Groundwater sample laboratory analytical results did not identify the presence of VOCs or
SVOCs at concentrations exceeding the DEQ 2L Standards or DEQ DWM Vapor Intrusion
GWSLs in downgradient groundwater samples TMW-2 and TMW-3. A low concentration of
lead (17.4 µg/L) was detected in the groundwater sample collected downgradient of the Site
building (TMW-2) at a concentration slightly above the 2L Standard of 15 µg/L. No other
compounds were detected at concentrations above the 2L Standards in downgradient
groundwater samples collected at the Site. A tabular summary of the groundwater sample
laboratory analytical results is provided as Table 2.
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1.3 Brownfields Eligibility
To address environmental concerns, the PD entered the Site into the DEQ Brownfields Program
in July 2020, and DEQ issued a Letter of Eligibility on August 27, 2020. The PD plans to raze
the Site for construction of three residential townhome buildings and associated access roads and
parking areas. A conceptual redevelopment plan depicting the proposed townhome building
layout is included in Appendix A.
Based upon recent discussions with DEQ Brownfields, baseline soil gas data is needed to
evaluate the type of vapor intrusion mitigation system needed for the future townhome buildings.
Therefore, this Work Plan has been prepared to address DEQ requests for vapor intrusion
assessment at the Site. The proposed soil gas sampling activities are described in the following
sections.
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2.0 Brownfields Assessment Activities
The proposed assessment activities will be performed in general accordance with the DEQ IHSB
Guidelines for Assessment and Cleanup (Guidelines) dated January 2020, the DEQ DWM Vapor
Intrusion Guidance (VI Guidance) dated March 2018, and 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.
Prior to conducting field activities, H&H will contact North Carolina 811, the public utility
locator, to mark subsurface utilities located on the Site. H&H will also contract with a private
utility locator to screen proposed sample locations for subgrade utilities that may not be marked
by the public locator. Additionally, boring locations will be hand cleared to approximately 5 feet
(ft) below the ground surface (bgs) prior to use of mechanical drilling equipment to further
screen the boring locations for the presence of subsurface utilities.
2.1 Soil Gas Sampling Activities
H&H proposes to collect nine (9) soil gas samples across the Site to evaluate the potential
presence of compounds at concentrations that may pose a potential risk for structural vapor
intrusion into the proposed buildings. The proposed soil gas sample locations are shown in
Figure 3 and have been chosen to provide adequate coverage for the likely townhome building
layout shown in the conceptual plan (Appendix A).
H&H will team with a qualified drilling contractor to advance soil borings at each proposed
sample location for installation of temporary soil gas monitoring points. Soil borings will be
advanced to a minimum depth of 5 ft bgs and a minimum of 5 ft above the water table utilizing a
decontaminated stainless steel hand auger and/or a track-mounted drill rig capable of using direct
push technology (DPT) drilling techniques. Continuous soil samples will be collected from the
center of the hand auger bucket or from acetate lined DPT macrocore sleeves at each boring.
The soil samples will be logged for lithological description, observed for obvious evidence of
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staining and odors, and field screened for the presence of organic vapors using a calibrated
photoionization detector (PID).
An approximate 6-inch stainless steel vapor implant screen attached to Teflon® sample tubing
will then be placed at the base of each borehole. The annular space around the vapor implant
screen will be filled with filter sand to a depth of approximately 6-inches above the vapor screen.
Following installation of the sand, hydrated bentonite will be installed in the boring from the top
of the sand to near the ground surface. The monitoring points will be allowed to equilibrate for
approximately 24 hours following installation.
After the sampling points have equilibrated, the Teflon® sample tubing at each sample location
will be connected to a laboratory supplied batch certified 1-liter or 3-liter stainless steel Summa
sample canister connected to an in-line flow controller with a vacuum gauge using a brass nut
and ferrule assembly to form an air-tight seal. The flow controller will be pre-set by the
laboratory to regulate the vapor intake rate to approximately 100 milliliters per minute. H&H
will request that the laboratory provide flow controller calibration information, if available.
Prior to collection of the soil gas samples, a leak check will be conducted by constructing a
shroud around the sample train (sample point, sample tubing, and connections to the flow
controller and Summa sample canister) at each sampling location and flooding the air within the
shroud with helium gas. Helium concentrations inside the shroud will be measured using a
calibrated helium gas detector and maintained at concentrations of approximately 15% to 30%
for the duration of the leak check. Using a syringe and three-way valve, the Teflon® sample
tubing, sand filter pack, and vapor implant screen will be purged of a minimum of three volumes.
A sample will then be collected from the sample tubing outside the shroud into a Tedlar bag and
analyzed using the helium gas detector to ensure that helium concentrations are less than 10% of
the helium concentrations measure within the shroud.
Following successful leak checks, the intake valves on the Summa® canisters will be fully
opened to begin collection of the soil gas samples. If 1 liter Summa canisters are used, then the
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samples will be collected over an approximate 10-minute period; if 3 liter Summa canisters are
used, then the samples will be collected over and approximate 30-minute period. Vacuum
readings on the Summa® canisters will be recorded prior to and following the sampling period to
ensure adequate sample volume was collected. A vacuum will be maintained within the
canisters at the conclusion of the sampling event.
After sample collection, the intake valve will be closed, and the regulator will be disconnected
from the canister. The starting and ending vacuum in each canister will be recorded on the chain of
custody and submitted to the laboratory along with the samples. The canisters will be placed in
laboratory supplied shipping containers, properly labeled, and shipped under standard chain of
custody protocols to a qualified laboratory for analysis of VOCs by EPA Method TO-15. A
sample summary table is provided as Table 3.
Following sampling activities, the soil gas monitoring point locations will be estimated using a
hand-held global positioning system (GPS) unit. The soil gas monitoring points will then be
abandoned and the ground surface will be repaired similar to pre-drilling conditions.
2.2 Quality Assurance – Quality Control
Non-dedicated equipment and tools will be decontaminated prior to use at each boring location
or following exposure to soil. To evaluate the reproducibility of the sample results, H&H will
collect a duplicate soil gas sample from one of the sample locations using a laboratory supplied
“T-sampler” which allows for collection of two samples from the same location simultaneously.
The duplicate soil gas sample will be submitted for analysis of VOCs by EPA Method TO-15.
As noted above, a vacuum will be maintained within the canisters at the conclusion of the
sampling event per laboratory standard operating procedures. In addition, Summa cannister
vacuum upon receipt from the laboratory will be compared to vacuum recorded at the laboratory
prior to shipment. If vacuum difference is greater than 10%, the Summa cannister will not be
used for collection of a soil gas sample at the Site.
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Laboratory QA/QC procedures will be employed to ensure appropriate sample handling and
analysis and to aid in the review and validation of the analytical data. QA/QC procedures will be
conducted in accordance with the method protocols and will include regular equipment
maintenance, equipment calibrations, and adherence to specific sample custody and data
management procedures. Samples will be analyzed in conjunction with appropriate blanks,
laboratory duplicates, continuing calibration standards, surrogate standards, and matrix spiking
standards in accordance with approved methodologies to monitor both instrument and analyst
performance. H&H will request that the laboratory include estimated concentrations for
compounds that are detected at levels above the laboratory method detection limit, but below the
laboratory reporting limit (J Flags). Additionally, H&H will request that the laboratory use
method detection limits that are below DEQ DWM Residential Vapor Intrusion Soil Gas
Screening Levels (SGSLs).
The laboratory analytical data report and QA package for each group of samples submitted to
and analyzed by the subcontracted laboratory will be provided in an appendix to the final report.
Laboratory QA data consistent with Level II documentation will be provided for this project.
A copy of the completed chain of custody record and shipping receipt will be appended to the
corresponding laboratory analytical report included with the final report.
2.3 Investigation Derived Waste
Investigation derived waste (IDW) generated during the proposed assessment activities will be
managed in general accordance with DEQ IHSB Guidelines. IDW generated during the
assessment activities will be thin spread on-Site. However, in the unlikely event significant
impacts are observed (i.e., elevated PID readings, free product, etc.) soil cuttings will be
containerized in 55-gallon drums and staged on-Site pending analytical results of a composite
IDW sample. Based on laboratory analytical results of IDW samples, the IDW will be properly
managed.
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2.4 Reporting
Following completion of the assessment activities and receipt of the analytical data, H&H will
document our findings in a Soil Gas Assessment Report. The report will include a description of
field activities, rationale for potential deviations from the Work Plan (if warranted), field
sampling forms including leak check data, a figure depicting sample locations, tabular
summaries of the data, laboratory analytical reports and chain of custody records, a discussion of
the data in comparison to regulatory screening levels, cumulative risk calculations for exterior
soil gas analysis (if warranted), and conclusions and recommendations concerning our activities.
The report will also include the firm geology and engineering license numbers and a licensed
professional seal and signature.
Tables
Table 1Summary of Soil Sample Analytical Data235 E. Cama StreetCharlotte, North CarolinaH&H Job No. BOU-016Sample TypeGrab Grab Grab GrabSample IDSB-1 SB-2 SB-3 SB-4Sample LocationFormer Auto Repair Building AreaWithin Septic Drain FieldAdjacent to Septic TankFormer Automotive Paint Shed AreaDepth (ft bgs)3-4 4-5 2-3 2-3Date5/4/2020 5/4/2020 5/4/2020 5/4/2020Range MeanUnitsVOCs (8260B)Acetone<0.2240.0104 J 0.0450 J 0.0361 J 25 12,000 140,000 -- --sec-Butylbenzene 0.627<0.0019 <0.0018 <0.00194.1 1,600 23,000 -- --tert-Butylbenzene 0.418<0.0015 <0.0014 <0.00154.1 1,600 23,000 -- --4-Methyl-2-pentanone 0.115 J<0.0033 <0.0031 <0.00340.45 7,000 30,000 -- --SVOCs (8270D)Fluoranthene<0.124 <0.122 <0.1280.288 J 670 48 6,000 -- --Phenanthrene<0.103 <0.102 <0.1060.256 J 134 NE NE -- --Pyrene<0.113 <0.111 <0.1160.200 J 440 360 4,500 -- --Metals (6020/7471)Arsenic 1.71 1.21 J<0.4941.35 5.80.68 3.0 1.0 - 18 4.8Barium 34.0 40.9 17.9 71.1 5803,100 47,000 50 - 1,000 356Cadmium<0.508 <0.496 <0.4750.781 J 3.014 200 1.0 - 10* 4.3Trivalent Chromium 24.2 19.8 10.0 24.7 360,00023,000 350,000 NS NSHexavalent Chromium 0.542 J<0.3120.407 J<0.3253.80.31 6.5 NS NSTotal Chromium 24.7 19.8 10.4 24.7 NENE NE 7.0 - 300 65Lead 8.05 51.4 3.44 185 270400 800 ND - 50 16Mercury 0.0520 0.0677<0.02110.487 1.02.3 9.7 0.03 - 0.52 0.121Selenium<1.26 <1.23 <1.18 <1.292.178 1,200 <0.1 - 0.8 0.42Silver<0.266 <0.260 <0.249 <0.2723.478 1,200 ND - 5.0 NSNotes:1) North Carolina Department of Environmental Quality (DEQ) Inactive Hazardous Sites Branch (IHSB) Preliminary Soil Remediation Goals (PSRGs) (December 2019)2) Range and mean values of background metals for North Carolina soils taken from Elements in North American Soils by Dragun and Chekiri, 2005. Background Cd and Ag concentrations were taken from Southeastern and Conterminous US soils.Soil concentrations are reported in milligrams per kilogram (mg/kg).Compound concentrations are reported to the laboratory method detection limits.Aside from metals, only those compounds detected in at least one sample are shown in the table above.Laboratory analytical methods are shown in parentheses.VOCs = volatile organic compounds; SVOCs = semi-volatile organic compounds; ft bgs= feet below ground surfaceNE = Not Established; ND = Not Detected; NS= Not Specified; -- = Not ApplicableJ = compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration. mg/kgResidential PSRGs (1)Industrial/ Commercial PSRGs (1)Regional Background Metals in Soil (2)Protection of Groundwater PSRGs (1)S:\AAA‐Master Projects\Boulevard Realty Estate Advisors (BOU)\BOU‐016 235 E Cama St\Ph II\Tables\235 E Cama (BOU‐016) Data Tables.xlsx7/1/2020Table 1 (Page 1 of 1)Hart & Hickman, PC
Table 2Summary of Groundwater Sample Analytical Data235 E. Cama StreetCharlotte, North CarolinaH&H Job No. BOU-016Sample ID TMW-1 MW-1 TMW-2 TMW-3Date 5/4/2020 5/19/2020 5/4/2020 5/4/2020Sample Location Upgradient Upgradient Downgradient DowngradientUnitsVOCs (8260B)1,1-Dichloroethane0.79 J 0.84 J<0.27 <0.276 76 3301,1-Dichloroethene1.9 3.6<0.24 <0.24350 39 160cis-1,2-Dichloroethene0.65 J 0.66 J<0.29 <0.2970 NE NETetrachloroethene1.9 4.3<0.16 <0.160.7 12 48Trichloroethene<0.220.57 J<0.22 <0.22314.4Trichlorofluoromethane0.33 J 1.1<0.31 <0.312,000 NE NESVOCs (8270D)NAALL BDL ALL BDL ALL BDL -- -- --Metals (6020B/7470A)Arsenic<0.735 NA0.779 J<0.73510 -- --Barium38.1NA134 133700 -- --Cadmium<0.478 NA <0.478 <0.4782-- --Chromium (total)1.81 JNA6.67<1.4910 -- --Lead<2.49 NA17.4<2.4915 -- --Mercury<0.100 NA <0.100 <0.1001-- --Selenium<0.657 NA <0.657 <0.65720 -- --Silver<0.513 NA <0.513 <0.51320 -- --Notes:1) NC Department of Environmental Quality (DEQ) 15A North Carolina Administrative Code 02L.0202 Groundwater Quality Standard (2L Standard) revised April 2013.2) DEQ Division of Waste Management (DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs) (February 2018)TMW-2 and TMW-3 groundwater samples for semi-volatile organic compounds (SVOC) analysis were collected on May 19, 2020. MW-1 groundwater sample for SVOC analysis was collected on June 17, 2020.Compound concentrations are reported in micrograms per liter (μg/L).Compound concentrations are reported to the laboratory method detection limits.Only those compounds detected in at least one sample are shown in the table above.Laboratory analytical methods are shown in parenthesesBold indicates that the detected concentration exceeds the 2L Standard.VOCs = volatile organic compounds; NE = Not Established; NA = Not Analyzed; -- = Not ApplicableJ = compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration.2L Groundwater Standard (1)DWM Residential Vapor Intrusion GWSLs (2)DWM Non-Residential Vapor Intrusion GWSLs (2)µg/LS:\AAA‐Master Projects\Boulevard Realty Estate Advisors (BOU)\BOU‐016 235 E Cama St\Ph II\Tables\235 E Cama (BOU‐016) Data Tables.xlsx7/1/2020Table 2 (Page 1 of 1)Hart & Hickman, PC
Table 3Sample Summary TableEast Cama Street235 E. Cama StreetCharlotte, North Carolina H&H Project No. BOU-016SG-1 through SG-9 Soil Gas9 VOCs by EPA Method TO-15SG-DUP Soil Gas QA/QC1/day VOCs by EPA Method TO-15Notes:VI = vapor intrusion; VOCs = volatile organic compounds; QA/QC = Quality Assurance/ Quality Control; ft bgs = feet below the ground surface* = Soil gas monitoring point depths will be based on depth to groundwater Number of Samples AnalysisSample ObjectiveSample TypeApproximate Boring Depth (ft bgs)varies *varies *Evaluate potential VI risks Sample IDsApproximate Sample Depth (ft)M:\AAA-Master Projects\Boulevard Realty Estate Advisors (BOU)\BOU-016 235 E Cama St\Additional Brownfields Assessment\Sample Summary TableTable 1 (Page 1 of 1) Hart & Hickman, PC
Figures
SITE LOCATION MAP
EAST CAMA STREET
235 E. CAMA STREET
CHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE NO:
4-13-20 0
1BOU-016
0 2000 4000
APPROXIMATE
SCALE IN FEET
N
U.S.G.S. QUADRANGLE MAP
7.5 MINUTE SERIES (TOPOGRAPHIC)
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203
704.586.0007(p) 704.586.0373(f)
CHARLOTTE WEST, NORTH CAROLINA 1996
SITE
E.
C
A
M
A
S
T
R
E
E
T
720
73
0
SB-2
SB-3
SB-1
TMW-2
TMW-3
TMW-1/MW-1
SB-4
REVISION NO. 0
JOB NO. BOU-016
DATE: 4-22-21
FIGURE NO. 2
EAST CAMA STREET
235 E. CAMA STREET
CHARLOTTE, NORTH CAROLINA
SITE MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
UNNAMED TRIBUTARY OF IRWIN CREEK
ELEVATION CONTOUR (FT ABOVE MSL - 2 FT
CONTOUR)
SOIL BORING LOCATION
CO-LOCATED TEMPORARY AND PERMANENT
MONITORING WELL LOCATION
TEMPORARY GROUNDWATER MONITORING
WELL LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
NOTES:
1.BASEMAP IMAGERY AND LIDAR ELEVATION DATA
OBTAINED FROM MECKLENBURG COUNTY GIS
(2019).
2.SOIL BORING AND TEMPORARY MONITORING
WELLS INITIALLY ADVANCED BY H&H ON MAY 4,
2020.
3.PERMANENT MONITORING WELL ADVANCED BY
H&H ON MAY 19, 2020 AND ABANDONED ON JUNE
17, 2020.
730
720
73
0
SG-1
SG-2
SG-3
SG-5
SG-6
SG-7
SG-8
SG-9
SG-4
REVISION NO. 0
JOB NO. BOU-016
DATE: 4-22-21
FIGURE NO. 3
EAST CAMA STREET
235 E. CAMA STREET
CHARLOTTE, NORTH CAROLINA
PROPOSED SAMPLE LOCATION MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
UNNAMED TRIBUTARY OF IRWIN CREEK
ELEVATION CONTOUR (FT ABOVE MSL - 2 FT
CONTOUR)
PROPOSED SOIL GAS MONITORING POINT
LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
730
E.
C
A
M
A
S
T
R
E
E
T
Appendix A
Proposed Redevelopment Layout
EX CENTERLINEPROP.73' COMMERCIAL WIDE R/WPROP.73' COMMERCIAL WIDE R/WEX. 50' R/WEX. 60' R/WPROP. 8' SIDEWALKAND 8' PLANTINGEX CENTERLINEPROP.73'COMMERCIALWIDE R/WPROP.73'COMMERCIALWIDE R/W73'73'EX. 60' R/W8'8'PROP. 8' SIDEWALKAND 8' PLANTING STRIPPARKING (TYP.)7PROP. ROADBARRICADEHERIOT AVENUE50' PUBLIC R/W (NOT OPEN)M.B. 7, PG. 743E. CAMA
STREET
60'
PUBL
IC
R
/WM.B.
7
,
PG
.
7
4320'5'8'0322'30'2
5'
5'20'20'2
2
2
2
2
2
2
10
SCALE IN FEET
0 20 30
42'27'35'26'37'2
2
2
2
2
2
2
2
32
SPACES
15
HOMES
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
Trash
31'26'STUDY 1 15 Townhomes 04/01/2021