HomeMy WebLinkAbout24035_Fmr TA Sherrill_Final Grade Sampling Work Plan_20231102Work Plan for Final Grade Soil Sampling
Former TA Sherrill Construction Co Brownfields Site ■ Charlotte, North Carolina
November 2, 2023 ■ Terracon Project No. 71197854
Facilities | Environmental | Geotechnical | Materials 2
Table of Contents
1.0 INTRODUCTION ........................................................................... 4
2.0 SCOPE OF WORK ......................................................................... 5
2.1 Proposed Sample Locations/Depths ....................................................... 5
2.2 Sampling Methodology ......................................................................... 5
2.3 Laboratory Analyses ............................................................................ 6
2.4 Quality Assurance/Quality Control ......................................................... 6
2.5 Investigation Derived Waste ................................................................. 6
3.0 REPORTING................................................................................. 7
Work Plan for Final Grade Soil Sampling
Former TA Sherrill Construction Co Brownfields Site ■ Charlotte, North Carolina
November 2, 2023 ■ Terracon Project No. 71197854
Facilities | Environmental | Geotechnical | Materials 3
Attachments
Attachment 1 Plan Approval Signature Page
Attachment 2 Work Plan and Report Checklist
List of Tables
Table 1 Proposed Sample and Analysis Plan
List of Figures
Figure 1 Topographic Map
Figure 2 Proposed Final Grade Soil Sample Locations
List of Appendices
Appendix A Prior Site Assessment Tables and Figures
Work Plan for Final Grade Soil Sampling
Former TA Sherrill Construction Co Brownfields Site ■ Charlotte, North Carolina
November 2, 2023 ■ Terracon Project No. 71197854
Facilities | Environmental | Geotechnical | Materials 4
1.0 INTRODUCTION
The Former TA Sherrill Construction Co. Brownfields project is located at 2006 North
Brevard Street in Charlotte, Mecklenburg County, North Carolina (Figure 1) and
consists of an approximate 2.909-acre parcel (Parcel ID 08304612). The site was
previously occupied by the TA Sherrill Construction Company starting in the late-1970s,
during which time five underground storage tanks (USTs) were operated on the
property. The USTs were removed from the ground in 1992, at which time a petroleum
release was assigned (Incident No. 16865). Approximately 500 cubic yards of impacted
soil were excavated and disposed off-site and a No Further Action (NFA) letter was
issued for the release incident. Piggyback Service Company, a trucking/distribution firm,
occupied the site from the early-2000s until late 2020 and utilized the property for truck
maintenance and storage.
Terracon conducted subsurface sampling activities at the site in February and March
2020 consisting of the collection of 25 soil samples, three groundwater samples, and
four soil vapor samples. Low-level poly-aromatic hydrocarbon (PAH), lead, arsenic, and
hexavalent chromium impacts were identified within soils at the site. Numerous
petroleum compounds were detected above their 2L Standards within groundwater near
a former on-site UST system. Tetrachloroethylene (PCE) was also detected in
groundwater above its 2L Standard in the northern portion of the site. The source of the
PCE is unknown but is believed to have likely migrated from an off-site source based on
the apparent lack of on-site sources in soils near the detection. Numerous volatile
organic compounds (VOCs) were detected in soil vapor at the site; however, none of the
identified concentrations were detected above their Residential Soil Gas Screening Levels
(SGSLs). Figures and tables documenting prior investigation results at the site are
included in Appendix A.
MCP Optimist Park, LLC (Prospective Developer [PD]), applied for entry to the North
Carolina Brownfields Redevelopment Section (BRS) and was granted eligibility into the
BRS on August 24, 2020. Based on the above-described activities, Terracon developed
an Environmental Management Plan (EMP) outlining soil management measures for the
PD to implement during the proposed redevelopment of the site into a multi-family
apartment building. The EMP was approved by the BRS on November 5, 2020. The EMP
requires that final grade soil sampling be conducted at the site to evaluate future risk to
site occupants from shallow soils remaining uncapped after construction activities have
been completed, and land use restriction “f” in the Notice of Brownfields Property dated
January 12, 2022 requires the collection of final grade soil samples prior to use of the
areas of the site where physical redevelopment occurred pursuant to the EMP. At present
time, the exterior site redevelopment work has been completed, with interior finishing of
the building remaining. Terracon has developed this Work Plan to complete the required
final grade sampling required by the EMP and the Notice of Brownfields Property.
Work Plan for Final Grade Soil Sampling
Former TA Sherrill Construction Co Brownfields Site ■ Charlotte, North Carolina
November 2, 2023 ■ Terracon Project No. 71197854
Facilities | Environmental | Geotechnical | Materials 5
2.0 SCOPE OF WORK
2.1 Proposed Sample Locations/Depths
The redevelopment activities at the site included the construction of an approximate
325-unit multi-family apartment building and the associated parking garage. Portions of
the site remaining uncapped are limited to relatively minor areas landscaping
surrounding the hardscape. Terracon proposes to collect two composite soil samples
(CS-01 and CS-02) from the shallow soils (0 to 2 feet bls) within the landscaped areas
at the site. CS-01 and CS-02 will be composited from four or five aliquot locations (CS-
01A through CS-01D and CS-02A through CS-02E, respectively), as shown on Figure 2.
Please note that the individual aliquot locations may be adjusted in the field based on
the location of subsurface utilities identified during public and private utility locating
(utilizing ground-penetrating radar) conducted prior to ground disturbing activities
and/or other site constraints observed (e.g. slopes, vegetation, etc.). Samples will be
analyzed for the standard BRS suite of analytes (volatile organic compounds [VOCs],
semi-volatile organic compounds [SVOCs], Resource Conservation and Recovery Act
[RCRA] Metals, and hexavalent chromium), as summarized in Section 2.3 and Table 1.
2.2 Sampling Methodology
Soil sampling will be conducted in accordance with the sampling procedures outlined in
the NCDEQ Inactive Hazardous Site Branch’s (IHSB) Guidelines for Assessment and
Cleanup of Contaminated Sites (September 2022). Soil type, relative moisture content,
and other lithologic characteristics will be documented in the field. Each soil sample will
be composited from four aliquot locations by advancing a decontaminated hand auger to
approximately 2-feet bls at each location.
The soils from each location and sample depth (0 to 2 feet) will be divided equally with
one-half placed in a sealed plastic bag on ice within a cooler and the other half placed in
a sealed plastic bag that will be allowed to volatilize for approximately 5 to 10 minutes.
After the volatilization period, the headspace of the second plastic bag (not placed on
ice) will be screened for volatile vapors using a photo-ionization detector (PID). A grab
sample for VOC analysis will be collected from the corresponding sealed plastic bag that
had been stored on ice from the location exhibiting the highest PID reading. For
composite sample collection, soils from the sealed plastic bags (placed on ice) from each
set of borings will be composited using a decontaminated stainless-steel bowl and spoon
via the sample homogenization procedures outlined in the U.S. Environmental Protection
Agency’s SESDPROC-300-R3 (June 11, 2020) guidance.
After sampling has been completed, the soil borings will be abandoned by returning the
excess soil cuttings to their respective borings in a “first-out, last-in” manner.
Work Plan for Final Grade Soil Sampling
Former TA Sherrill Construction Co Brownfields Site ■ Charlotte, North Carolina
November 2, 2023 ■ Terracon Project No. 71197854
Facilities | Environmental | Geotechnical | Materials 6
2.3 Laboratory Analyses
Based on BRS protocols, the soil samples will be analyzed for the following:
◼ VOCs via EPA Method 8260;
◼ SVOCs via EPA Method 8270;
◼ RCRA 8 Metals via EPA Methods 6010 and 7471; and
◼ Hexavalent chromium via EPA Method 7199.
The laboratory analyses will be completed by a North Carolina-certified laboratory.
2.4 Quality Assurance/Quality Control
In addition to the two grab (VOC) and composite samples (other analyses), Terracon will
collect sufficient soil volumes for the laboratory to complete the following samples for
quality assurance/quality control (QA/QC) purposes:
◼ One field/equipment blank (collected by rinsing deionized water over the bucket
of the hand auger and the mixing bowl and collecting the rinsate in laboratory-
supplied glassware; sample to be analyzed for VOCs only);
◼ One trip blank, analyzed for VOCs only;
◼ One blind duplicate sample analyzed for the full suite of analyses; and
◼ One matrix spike/matrix spike-duplicate sample analyzed for the full suite of
analyses.
The soil samples collected as part of this assessment will be containerized in laboratory-
provided glassware and stored on ice within a cooler(s) for shipment to the laboratory.
Chain of custody documentation summarizing the sample IDs, collection times, required
analyses, and sampling personnel will accompany the cooler(s) to the laboratory.
A Level II QA/QC package will be requested from the laboratory, whose reporting and
method detection limits will meet applicable screening criteria to the extent
technologically feasible. The analytical report will include the use of J-flags for estimated
concentrations.
2.5 Investigation Derived Waste
A minor quantity of soil cuttings and decontamination fluids (approximately 2 to 3
gallons) will be generated as part of the final grade soil sampling activities. Soil cuttings
will be returned to their respective boreholes in a ”first-out, last-in” fashion. The
decontamination fluids will be spread within the vegetated areas of the site in
accordance with 15A NCAC 2T regulations.
Work Plan for Final Grade Soil Sampling
Former TA Sherrill Construction Co Brownfields Site ■ Charlotte, North Carolina
November 2, 2023 ■ Terracon Project No. 71197854
Facilities | Environmental | Geotechnical | Materials 7
3.0 REPORTING
Upon completion of the soil sampling activities and receipt of the laboratory analytical
results, a report will be prepared that will include the following items:
◼ A Title Page consistent with BRS requirements (Site Name, Consulting Firm
Licensing information, PG/PE signature and seal, etc.);
◼ Documentation of field activities;
◼ Site plan showing pertinent site features and sample locations;
◼ Soil boring logs;
◼ Laboratory results and chain(s) of custody;
◼ Data evaluation, including comparison of tabulated soil data to applicable
regulatory standards (e.g. NCDEQ PSRGs) and modeling of risk to future site
occupants using the NCDEQ Risk Calculator; and
◼ Recommendations concerning further action, if necessary.
The report will be completed in a format suitable for submittal to the BRS. Work
associated with this scope of services will be performed under the direction of a Licensed
Geologist (PG) or Professional Engineer (PE) registered in the State of North Carolina.
The final report will be signed and sealed by the PG or PE.
ATTACHMENTS
Work Plan and Report Checklist
Version 3 March 2023
Minimum Requirements Checklist
Site Assessment Work Plans and Reports
NCDEQ Brownfields Redevelopment Section– March 2023
Instructional Page
All references to Prospective Developers include follow-on owners who may be conducting
work in accordance with the Brownfields Property Management Branch.
To increase predictability and most efficiently assess Brownfields Properties and the redevelopment
timing requirements of Prospective Developers or follow-on owners, the Brownfields
Redevelopment Section has standardized the format for Site Assessments. This format has been
generated in the form of a checklist to allow for ease in submission by the prospective developer’s
consultant and for the Brownfields Redevelopment Section’s completeness review. This checklist
outlines the minimum requirements and submittal format under the Brownfields Redevelopment
Section for Assessment Requirements and Reporting. All Assessment Work Plans and Report
submissions to the Brownfields Redevelopment Section must include this completed checklist in the
outlined format.
These requirements allow DEQ to reduce review time for the Assessment Work Plan and Report
and increase process predictability for prospective developers. This checklist will also provide
reliable data for risk-based decisions and further expedite the project timeline. Any divergence from
these requirements will lengthen the process of assessing risks on the site, may necessitate
reprioritization of a project manager’s queue towards projects that meet these requirements.
Therefore, delaying production of the brownfields agreement and/or environmental management
plan. Any alterations to the checklist on a site-specific basis must be reviewed and approved by the
Section prior to implementation. However, in order to respect the schedule of all projects in house
and keep the Section’s entire project pipeline moving, we strongly recommend against seeking
changes to the checklist.
Based on a review of environmental and risk data from our project inventory, please note
there are some new points of emphasis that are included herein:
1. For ALL residential reuses; sub-slab vapor assessment (full list EPA TO-15) is required,
regardless if existing structures will be removed. If no structures or slabs exist on the
Brownfields Property, exterior soil gas assessment is required within all proposed structure
footprints.
2. ALL properties require groundwater data (VOCs, SVOCs and RCRA Metals) from a
minimum of three sample locations, depth to groundwater and a resulting potentiometric
map.
3. Soil shall be assessed based on areas of concern and redevelopment plans and across the
depth interval of the cut/grading.
Work Plan and Report Checklist
Version 3 March 2023
Environmental Site Assessment
Work Plan Checklist
Reviewed and checked by (Name): _______________________________________
Title Page
The title page should include the following information. Letter style reports are acceptable, as long as this
information is somewhere on the first page.
☒ Title of Work Plan
☒ Brownfields Project Name (not the development name)
☒ Brownfields Project Number
☒ Date (updated with each revision)
☒ Revision Number
☒ Firm PE/PG License Number
☒ Individual PE/PG seal & signature
Section 1 – Introduction
☒ Provide the site location, address, and acreage.
☒ Provide a BRIEF summary of the history of the property and its history in the Section. For example:
reiterate RECs from a Phase I ESA, indicate if the scope of work was negotiated during a Data Gap
Meeting, etc.
☒ Briefly list and describe the data gaps the assessment is attempting to fill
☒ Indicate if the assessment data is for the use of any other DEQ programs in addition to the Brownfields
Redevelopment Section (i.e. the site is a regulated UST, IHSB, etc. property)
Section 2 – Scope of Work
☒ Provide a general description of proposed scope of work covered in this plan (i.e. 2 new monitoring
wells, 6 groundwater samples, 5 exterior soil gas sampling points and 6 soil borings)
☒ Discuss samples to be collected by media and source area/location. Generally, the reasoning for the
sample locations selected.
☒ Describe depths of samples to be collected (Reference Table 1) or how that decision will be made in
the field, if needed.
☒ State for what each sample will be analyzed (briefly). Reference Table 1.
Note: For all residential reuses, sub slab vapor is required, if no slabs exist, exterior soil gas is required
within all proposed footprints.
Section 3 – Sampling Methodology
☒ Reference the guidance documents you intend to use. IHSB, EPA SESD, VI Guidance, Well
Construction Rules (NCAC 2C). Note deviations or methodology planned that is not covered by
such guidance (e.g., multi-increment sampling, passive air samplers, mobile labs, Hapsite,
simultaneous indoor/outdoor radon, high-volume sub-slab vapor testing, PFAS sampling).
☒ Describe what will be installed (soil boring, temporary well, permanent well, sub-slab vapor, exterior soil
gas, etc.). Include construction details.
☒ Discuss installation methodology (Hand Auger, DPT, etc.)
Discuss Equilibration Times
Work Plan and Report Checklist
Version 3 March 2023
• Monitoring wells (equilibration time prior to development and equilibration post well
development should be 24 hours, per EPA standard protocols).
• Vapor:
a. Sub slab vapor with minimally invasive points (e.g. Vapor Pins): Manufacturer’s
guidelines generally suggest 20 minutes may be sufficient with an airtight cap installed; or
b. Sub slab vapor points (other than minimally invasive points) or exterior soil gas points:
at least 24 hours (to be purged at installation and at time of sampling with an air-tight cap
in place in the interim).
☒ Discuss sample collection procedures. Include the following, at a minimum:
• Equipment to be used
• Purging methods and volumes
• Stabilization parameters for groundwater sampling
• Field screening methods
• Leak check procedures for sub-slab vapor and exterior soil gas samples (Note this is
required)
• Discuss how and when vacuum readings will be collected (for summa cans)
• Submission of the samples to the laboratory within 48 hours of collection and/or written
documentation of temperature maintenance if the situation requires extension beyond 48
hours prior to lab submittal
☒ Discuss sample point abandonment
Section 4 – Laboratory Analyses
☒ Discuss the proposed analyses (include method number, preparation method, if there are concerns
with short hold times, etc).
☒ Discuss any proposed limitations on the contaminants of concern, if any, and the reason for such
limitation (sufficient previous data, indoor air interferences, etc).
☒ Discuss laboratory certifications. Please note, NC does not certify labs for air samples. Please specify
what certification the proposed air lab holds.
☒ Indicate that the Reporting Limits/Method Detection Limits will meet applicable screening criteria
(to the extent feasible). Include reporting of J-Flags to meet criteria. – Discussed in QA/QC
section
☒ Indicate what Level QA/QC will be reported by the laboratory. Level II QA/QC is typically
acceptable. – Discussed in QA/QC section
Section 5 – QA/QC
☒ Specify the duplicate sample frequency. Minimum requirement: 1 duplicate per 20 samples, per
media, per method.
☒ Discuss Trip Blank. 1 Trip Blank per cooler/shipment of groundwater VOC analyses is required.
☒ Discuss how the lab will have sufficient sample volume for MS/MSD analyses.
☒ Discuss chain of custody and shipping.
Section 6 – Investigation Derived Waste (IDW) Management
☒ Discuss what IDW will be generated and how it is proposed to be managed. Management
recommendations should be in accordance with 15A NCAC 02T.1503 and 15A NCAC 02H. 0106.
Generally, if the Brownfields Property has not previously been assessed, then all IDW must be
containerized and characterized prior to management. Previous assessment data that indicate no
Work Plan and Report Checklist
Version 3 March 2023
Hazardous Waste (listed or characteristic) is likely to be encountered in the area of proposed
assessment will be required before thin spreading of IDW on-site is permitted.
Section 7 – Reporting
This section should discuss the components of the assessment report which will be prepared as a result of
the above sample collection. At a minimum, the report shall include:
☒ Title Page that is consistent with the requirements listed above.
☒ Reporting/summary of site work conducted for all sections outlined above in this checklist;
☒ Summary of findings and possible recommendations;
☒ All applicable tables and figures (shall include at a minimum the items below)
☒ Tables for tabulated analytical data per media sampled and analyzed, compared against
applicable screening levels, sample depths and depth to groundwater;
☒ Figure depicting actual sample locations collected, with each media depicted in the legend,
graphic scale and north arrow; and
☐ Groundwater potentiometric map, with graphic scale and north arrow. – Not Applicable to
this Scope of Work
☒ Appendices shall include (as applicable):
☒ Copies of field notes
☒ Boring logs for all soil borings, newly constructed monitoring wells, and exterior soil gas
locations
☐ Well construction and abandonment records – Not Applicable to this Scope of Work
Work Plan Approval Signature Page (see Attachment 1). The Consultant shall complete and
submit the Approval Signature Page with the work plan submittal for DEQ signature.
Work Plan and Report Checklist
Version 3 March 2023
Attachments
☒ Attachment 1 – Work Plan Approval Signature Page
☒ Table 1 – Proposed Sample Locations and Analyses on a Summary Table that includes:
☒ Sample ID
☒ Sample Objective
☒ Proposed Depth(s)
☒ Analytical Method(s)
☒ QA/QC Samples
☐ Background Samples – Not applicable
☒ Figure 1 – Site Location Map
☒ Site location on a topographic map base
☒ Graphic scale and north arrow
☒ Figure 2 – Site Map should include the following – Applicable Items Below Included
☒ Buildings
☐ Historical sample locations
☐ RECs or other areas of concern
☒ Proposed sample locations
☒ Sample identification labels
☐ Background samples
☐ QA/QC samples
☒ Graphic scale and north arrow
☐ High quality aerial suggested as the base map
☐ Figure 3 – Site Potentiometric Map that includes the following - Not Applicable to this Scope of Work
☐ Buildings
☐ Groundwater sample identification labels
☐ Arrow noting direction of groundwater flow
☐ Graphic scale and north arrow
☐ Figure 4 – Site Plume Maps (groundwater, soil vapor, etc.) – Not Applicable
☐ Figure 5 – Proposed Development (if available) – Not Applicable to this Scope of Work
☐ Overlay of historical and proposed sample locations
☐ Graphic scale and north arrow
☒ Appendix – Summary of Historical Analytical Data (if needed) – to include tables and figures only.
TABLES
Collection
Method
VOCs - 8260*SVOCs - 8270RCRA 8 Metals - 6020Hexavalent Chromium - 7199Hand AugerCS-01 CS-01A through
CS-01D 2 X X X X X
CS-02 CS-02A through
CS-02E 2 X X X X X
DUP-01 TBD in Field 2 X X X X X
MS/MSD-01 TBD in Field 2 X X X X X
EB-01 NA NA X
TB-01 NA NA X
Abbreviations:
* Denotes grab sample collection from individual boring location demonstrating the highest photo-ionization detector reading;
remaining analyses to be performed on composite samples obtained via homogenization of soils from each boring location
via decontaminated stainless steel bowl and spoon
Boring locations are shown on the accompanying Figure 2.
VOCs - volatile organic compounds
SVOCs - semi-volatile organic compounds
RCRA 8 Metals - Resource Conservation and Recovery Act Metals
bls - below land surface
TBD - To Be Determined
QA/QC - Quality Assurance/Quality Control
EB - Equipment Blank
TB - Trip Blank
AQUEOUS QA/QC SAMPLES
SOIL SAMPLES - TO EVALUATE EXPOSURE RISK FROM SHALLOW SOILS
Analysis
Sample ID Boring IDs Boring Depth
(feet bls)
Table 1
Proposed Sample and Analysis Plan
Final Grade Soil Sampling
Former TA Sherrill Construction Company
2000 North Brevard Street, Charlotte, North Carolina
Terracon Project No. 71197854
FIGURES
TOPOGRAPHIC MAP
Former TA Sherrill Construction Co
NCBP ID# 24035-20-060
2008 N. Brevard Street
Charlotte, North Carolina
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: DERITA, NC (1/1/1993) and CHARLOTTE EAST, NC (1/1/1988).
2701 Westport Road
Charlotte, NC 28208-3608
71197854
Project Manager:
Drawn by:
Checked by:
Approved by:
WOF
MNM
MNM
1”=2,000’
71197854.1
Oct. 2023
Project No.
Scale:
File Name:
Date:1
WOF Figure
APPROXIMATE
SITE BOUNDARY
2
Figure
2701 Westport Road
Charlotte, NC
Proposed Final Grade Soil Sample Locations
Drawn by:
Checked by:
Approved by:
WOF
Project No.
File Name:
Date:
Scale:
71197854
WOF
Oct. 2023MNM
Fig. 2MNM
Former TA Sherrill Construction Co.
Brownfields ID No. 24035-20-060
2000 North Brevard Street
Charlotte, NC
AS SHOWN
Project Manager:
CS-01A
CS-01B
CS-01CCS-01D
CS-02A
CS-02B CS-02C CS-02D
-Proposed Soil Boring/Aliquot
LEGEND
CS-02E
APPENDIX A
Sample Location Map FIGURENO.
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@A
@A
NC Center for Geographic Information & Analysis
Legend
@A SLSI Soil Boring / Temporary Monitoring Well
&>SLSI Soil Borings
@A Historic Soil Boring / Temporary Monitoring Well
#*Historic Soil Vapor Sample
&>Historic Soil SampleSite BoundaryTax Parcels
Former TA Sherill Construction CompanyNC Brownfields Site No. 24035-20-060 2000 - 2008 North Brevard Street2701 Westport Road Charlotte, North Carolina 28208 Charlotte, Mecklenburg County, North CarolinaPhone: (704) 509-1777 Fax: (704) 509-1888
³
0 100 20050Feet
PM:
Drawn By:
Checked By:
Approved By:
WOF
WOF
CLC
CLC
Project No:
Scale:
Filename:
Date:June 2020
1 inch = 100 feet
71197854
2
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2
3
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d
S
t
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tNorth Brevard StreetCharlotte Light RailWarp + WeftApartments
Sumter PackagingCorporation
SB-06
SB-14
SB-08
SB-18 SB-09SB-10
SB-11
SB-13
SB-12
SB-15 / TW-03
SB-16
SB-17
SB-19
TW-04 SB-20SB-21
SB-22 SB-23
SV-04
SV-03
SV-01
SV-02
SB-01
SB-02
SB-03
SB-04
SB-05
SB-07 / TW-02
Table 1
Summary of Historical Soil Analytical Results
February 2020 LSI
Villa Heights Site
2000-2028 North Brevard Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71187854
Sample ID:SB-1 SB-2 SB-3 SB-4 SB-5 SB-6 SB-7
Sample Date:2/3/2020 2/3/2020 2/3/2020 2/3/2020 2/3/2020 2/3/2020 2/3/2020
Location/Area:
Near
Geotechnical
Boring B-8
Western corner
of the building
Western
corner of the
building
Near covered
service area
Near covered
service area
Up-gradient of
the fill
materials
Down-gradient
of the fill
materials
PID (ppm):0.2 3.3 0.2 0.2 0.9 1.1 72.6
Sample Interval (ft
bgs):5-10 5-10 0-5 5-10 5-10 5-10 5-10
Acetone 25 12,000 140,000 0.025J 0.040J 0.041J 0.040J 0.041J 0.021J 0.050J
p-Isopropyltoluene 1.24 NE NE ND ND ND ND ND ND 0.011
Naphthalene 0.39 4.1 18 0.00035J 0.00072J ND ND ND ND ND
Styrene 1.5 1,200 7,300 ND ND ND ND ND 0.00058J ND
1,2,4-Trimethylbenzene 12 63 370 ND 0.00040J ND ND ND ND ND
Acenaphthene 16 720 9000 ND 0.25 ND ND ND ND ND
Aniline 0.042 88 400 0.65 ND ND ND ND ND ND
Anthracene 1,300 3,600 45,000 ND 0.57 ND ND ND ND ND
Benzo(a)anthracene 0.35 1.1 21 ND 1.2 0.26 ND 0.30 ND 0.26
Benzo(a)pyrene 0.12 0.11 2.1 ND 1.1 0.34 ND 0.33 ND 0.26
Benzo(b)fluoranthene 1.2 1.1 21 ND 1.3 0.37 ND 0.37 ND 0.32
Benzo(g,h,i)perylene 15,600 NE NE ND 0.94 0.28 ND 0.24 ND 0.23
Benzo(k)fluoranthene 12 11 210 ND 0.46 0.15J ND ND ND ND
Carbazole 0.74 NE NE ND 0.20J ND ND ND ND ND
Chrysene 36 110 2,100 ND 1.1 0.27 ND 0.29 ND 0.27
Dibenz(a,h)anthracene 0.38 0.11 2.1 ND 0.22 ND ND ND ND ND
Fluoranthene 670 480 6,000 ND 2.6 0.27 ND 0.49 ND 0.56
Fluorene 110 480 6,000 ND 0.29 ND ND ND ND ND
Indeno(1,2,3-cd)pyrene 3.9 1.1 21 ND 0.99 0.29 ND 0.29 ND 0.26
Phenanthrene 134 NE NE ND 2.1 ND ND 0.30 ND 0.44
Pyrene 440 360 4,500 ND 2.8 0.45 ND 0.68 ND 0.64
Arsenic 5.8 0.68 3 1.0 2.0 2.4 0.63 2.0 0.52 4.0
Chromium (Total)NE NE NE 23 39 40 45 40 11 43
Chromium VI 3.8 0.31 6.5 ND ND ND ND ND ND ND
Lead 400 400 800 8.3 45 61 15 84 0.77J 600
Mercury 1.0 1.6 23 0.036 0.039 0.032J 0.019J 0.12 ND 0.085
Selenium 2.1 78 1,200 0.4J 0.36J ND 0.18J 0.25J 0.28J 0.67J
Silver 3.4 78 1,200 0.024J 0.047J 0.060J 0.028J 0.085J ND 0.14
Barium 580 3,100 47,000 42 90 150 63 110 30 190
Cadmium 3.0 7.5 110 0.11J 0.24J 0.64 0.099J 0.28J 0.044J 1.2
Notes:
Results are shown in milligrams per kilogram (mg/kg).
ft bgs - Feet Below Ground Surface
ppm - parts per million
Only compounds detected within one or more sample are shown.
ND - Not Detected above Method Detection Limit
NS - Not Established
Detections are indicated in bold.
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
PSRG - NCDEQ Inactive Hazardous Sites Branch Preliminary Soil Remediation Goals (Dec. 2018)
Shaded cells indicate the detected concentrations exceed the regulatory threshold of the corresponding color.
RCRA Metals by EPA Method 6020 (Chromium VI by Method 7196A)
Analyte Residential PSRGs Non-Residential
PSRGs
Volatile Organic Compounds by EPA Method 8260
Semi-Volatile Organic Compounds by EPA Method 8270
PoG PSRG
Table 2
Summary of Historical Groundwater Analytical Results
February 2020 LSI
Villa Heights Site
2000-2028 North Brevard Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71187854
Sample ID:TW-2
Sample Date:2/3/2020
Location/Area:
Down-gradient
of the fill
materials
Depth to Water
(DTW):9.60 ft
Anthracene 2,000 0.097J
Benzo(a)pyrene 0.005 0.014J
Benzo(b)fluoroanthene 0.05 0.022J
Di-n-butylphthalate 700 3.0J
Diethylphthalate 6,000 0.30J
Chromium (Total)10 6.1
Lead 15 34
Barium 700 240
Cadmium 2 0.14J
Notes:
All results are shown in micrograms per liter (µg/L).
Only detected compounds are shown.
Detections are indicated in bold.
J - Estimated concentration between method detection limit and reporting limit.
Total chromium is assumed to consist exclusively of trivalent chromium based on lack
of hexavalent chromium detections within on-site soils.
Concentrations highlighted in yellow exceed their respective NCDEQ 2L groundwater standard.
Analyte
NCDEQ 2L
Groundwater
Standard
Semi-Volatile Organic Compounds by EPA Method 8270
RCRA Metals by EPA Method 6020 (Chromium IV by Method 7196A)
Table 3
Summary of Historical Soil Vapor Analytical Results
February 2020 LSI
Villa Heights Site
2000-2028 North Brevard Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71187854
Sample ID:SV-01 SV-02 SV-03 SV-04
Sample Date:02/03/20 02/03/20 02/03/20 02/03/20
Sample Depth:4.5-5 4.5-5 4.5-5 4.5-5
220,000 2,700,000 26 120 21 160
Benzene 120 1,600 2.1 4.2 1.1 3.3
1,3-Butadiene 14 180 3.4 <0.32 <0.32 <0.32
2-Butanone (MEK)35,000 440,000 3.8J 17J 3.7J 23J
Carbon Disulfide 4,900 61,000 <0.43 22 2.3J 11
Chloroform 41 530 0.94J <0.36 4.3 <0.36
Dichlorodifluoromethane (Freon 12)700 8,800 <0.43 <0.43 14 29
cis-1,2-Dichlorothylene NE NE <0.32 67 <0.32 1.3
trans-1,2-Dichloroethylene NE NE <0.32 1.4 <0.32 <0.32
1,2-Dichloro-1,2,2-tetrafluroroethane (Freon 114)NE NE <0.79 <0.79 77 49
Ethanol NE NE 20 32 9.8J 17
Ethylbenzene 370 4,900 7.6 120 2.1 8.7
Heptane 2,800 35,000 3.3 46 8.7 12
Hexane 4,900 61,000 16J 21J <1.2 26J
Methyl tert-Butyl Ether (MTBE)3,600 47,000 <0.36 2.4 <0.36 <0.36
Methylene Chloride 4,200 1,800,000 1.0J <0.84 0.97J 1.5J
Naphthalene 21 260 <0.80 <0.80 1.0 16
Propene NE NE 31 72 <0.64 160
Styrene 7,000 88,000 <0.53 16 4.4 <0.53
Tetrachloroethylene 280 3,500 5.5 26 14 <0.75
Toluene 35,000 440,000 49 23 3.5 7.2
Trichloroethylene 14 180 <0.43 6.1 <0.43 <0.43
Trichlorofluoromethane (Freon 11)NE NE 5.8 <0.85 68 <0.85
1,3,5-Trimethylbenzene 420 5,300 <0.62 1.5 <0.62 3.2
m&p-xylene 700 8,800 29 16 8.0 15
o-Xylene 700 8,800 8.6 4.3 4.4 25
Notes:
Concentrations are reported in micrograms per cubic meter (μg/m3) unless otherwise noted.
Only detected compounds are shown.
Concentrations detected above the laboratory reporting limit are shown in bold.
NS - no standard
DWM - North Carolina Department of Environmental Quality, Division of Waste Management
SGSL - DWM Sub-slab and Exterior Soil Gas Screening Level, updated February 2018.
Concentrations highlighted in yellow exceed their respective residential SGSL.
Residential
Screening Levels
SGSL
Non-
Residential
Screening
Levels SGSL
Analyte
Acetone
EPA Method TO-15
Table 4
Summary of Soil Analytical Results
Supplemental LSI
Villa Heights Site
2000-2028 N. Brevard Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71197854
Sample ID:SB-08 SB-09 SB-10 SB-11 SB-12 SB-13 DUP (SB-13)SB-14 SB-15
PID (ppm):0.6 1.5 6.3 0.3 1.2 2.3 2.3 6.3 0.2
Sample Interval (ft
bgs):0 - 2 0 - 2 0 - 2 0 - 2 0 - 2 0 - 2 0 - 2 0 - 2 0 - 2
Acetone 0.022 J 0.026 J 0.024 J 0.017 J <0.0095 0.023 J 0.017 J 0.024 J 0.012 J 25 12,000 140,000
n-Butylbenzene <0.00050 <0.00051 <0.00057 <0.00059 <0.00056 <0.00052 <0.00067 <0.00061 <0.00038 4.5 78 12,000
sec-Butylbenzene <0.00080 <0.00081 <0.00090 <0.00095 <0.00090 <0.00083 <0.0011 <0.00097 <0.00061 4.1 1,600 23,000
1,4-Dichlorobenzene <0.00080 <0.00081 <0.00090 <0.00095 <0.00090 <0.00083 <0.0011 <0.00097 <0.00061 0.39 380 2,000
Ethylbenzene <0.00060 <0.00061 <0.00068 <0.00071 <0.00068 <0.00062 <0.00080 <0.00073 <0.00046 13 6.1 27
Isopropylbenzene (cumene)<0.00060 <0.00061 <0.00068 <0.00071 <0.00068 <0.00062 <0.00080 <0.00073 <0.00046 2.3 410 2,100
p-Isopropyltoluene <0.00050 <0.00051 <0.00057 <0.00059 <0.00056 <0.00052 <0.00067 <0.00061 <0.00038 1.24 NE NE
Naphthalene <0.00040 <0.00041 <0.00045 <0.00047 <0.00045 <0.00041 <0.00053 <0.00049 <0.00030 0.39 4.1 18
n-Propylbenzene <0.00060 <0.00061 <0.00068 <0.00071 <0.00068 <0.00062 <0.00080 <0.00073 <0.00046 2.6 780 5,100
Toluene 0.00086 J <0.00061 0.0033 <0.00071 <0.00068 <0.00062 <0.00080 <0.00073 <0.00046 8.3 990 9,700
1,2,4-Trimethylbenzene <0.00030 <0.00030 <0.00034 <0.00036 <0.00034 <0.00031 <0.00040 <0.00036 <0.00023 12 63 370
1,3,5-Trimethylbenzene <0.00050 <0.00051 <0.00057 <0.00059 <0.00056 <0.00052 <0.00067 <0.00061 <0.00038 11 56 320
o-Xylene <0.00060 <0.00061 <0.00068 <0.00071 <0.00068 <0.00062 <0.00080 <0.00073 <0.00046 9.8 140 590
m&p-Xylene <0.0010 <0.0010 <0.0011 <0.0012 <0.0011 <0.0010 <0.0013 <0.0012 <0.00076 9.8 120 500
Acenaphthene <0.11 <0.11 <0.12 <0.12 <0.11 <0.11 0.38 <0.11 <0.10 16 720 9000
Anthracene <0.11 <0.11 <0.12 <0.12 <0.11 <0.11 1.2 <0.11 <0.10 1,300 3,600 45,000
Benzo(a)anthracene 0.18 J 0.34 0.17 J 0.47 0.15 J <0.13 2.2 <0.13 <0.12 0.35 1.1 21
Benzo(a)pyrene 0.23 0.40 0.21 J 0.43 0.15 J <0.13 1.8 <0.13 <0.12 0.12 0.11 2.1
Benzo(b)fluoranthene 0.31 0.56 0.26 0.66 0.23 <0.13 2.4 0.14 J <0.12 1.2 1.1 21
Benzo(g,h,i)perylene 0.18 J 0.27 <0.14 0.20 J <0.12 <0.12 0.72 <0.12 <0.11 15,600 NE NE
Benzo(k)fluoranthene <0.13 0.17 J <0.15 0.22 J <0.13 <0.13 0.93 <0.13 <0.12 12 11 210
Bis(2-ethylhexyl)phthalate 0.14 J <0.12 <0.14 1.2 <0.12 <0.12 <0.13 <0.12 <0.11 14 39 160
Carbazole <0.11 <0.11 <0.12 <0.12 <0.11 <0.11 0.54 <0.11 <0.10 0.74 NE NE
Chrysene 0.2 J 0.34 0.16 J 0.44 0.15 J <0.13 1.9 <0.13 <0.12 36 110 2,100
Dibenz(a,h)anthracene <0.12 <0.12 <0.14 <0.13 <0.12 <0.12 0.21 J <0.12 <0.11 0.38 0.11 2.1
Dibenzofuran <0.15 <0.15 <0.16 <0.16 <0.15 <0.15 0.34 J <0.14 <0.14 10 15 210
Fluoranthene 0.30 0.62 0.28 0.92 0.34 0.15 J 5 0.2 <0.11 670 480 6,000
Fluorene <0.15 <0.15 <0.16 <0.16 <0.15 <0.15 0.63 <0.14 <0.14 110 480 6,000
Indeno(1,2,3-cd)pyrene 0.18 J 0.3 <0.16 0.25 <0.15 <0.15 0.85 <0.14 <0.14 3.9 1.1 21
1-Methylnaphthalene <0.11 <0.11 <0.12 <0.12 <0.11 <0.11 <0.11 <0.11 <0.10 0.11 18 73
2-Methylnaphthalene <0.13 <0.14 <0.15 <0.15 <0.13 <0.13 <0.14 <0.13 <0.12 3.1 48 600
Naphthalene <0.13 <0.14 <0.15 <0.15 <0.13 <0.13 0.22 <0.13 <0.12 0.39 4.1 18
Phenanthrene 0.17 J 0.31 0.13 J 0.3 0.18J <0.11 4.7 0.12 J <0.10 134 NE NE
Pyrene 0.28 0.48 0.25 0.58 0.21 J <0.13 3.5 0.14 J <0.12 440 360 4,500
Arsenic 5.2 2.7 3.7 1.8 1.7 1.8 1.9 1.6 1.1 5.8 0.68 3
Chromium (Total)43 61 36 35 47 53 52 40 21 NE NE NE
Chromium VI 0.18 J 0.37 J 0.20 J <0.13 <0.23 0.85 <0.12 0.17 J <0.11 3.8 0.31 6.5
Lead 81 85 43 55 66 35 30 46 24 400 400 800
Mercury 0.032 0.15 0.068 0.079 0.11 0.11 0.12 0.098 0.022 J 1.0 1.6 23
Silver 1.1 0.18 0.14 0.11 0.1 0.095 0.10 J 0.11 0.082 J 3.4 78 1,200
Barium 120 130 110 140 90 60 58 120 130 580 3,100 47,000
Cadmium 0.54 0.89 0.14 J 0.089 J <0.055 <0.057 <0.060 <0.055 <0.053 3.0 7.5 110
Notes:
All samples collected on March 12, 2020
Results are shown in milligrams per kilogram (mg/kg).
ft bgs - Feet Below Ground Surface
ppm - parts per million
Only compounds detected within one or more sample are shown.
NA - Not Analyzed
NE - Not Established
Detections are indicated in bold.
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
PSRG - NCDEQ Inactive Hazardous Sites Branch Preliminary Soil Remediation Goals (Dec. 2019)
Shaded cells indicate the detected concentrations exceed the regulatory threshold of the corresponding color.
Residential
PSRGs
Non-Residential
PSRGs
Volatile Organic Compounds by EPA Method 8260
Semi-Volatile Organic Compounds by EPA Method 8270
PoG PSRG
RCRA Metals by EPA Method 6020 (Chromium VI by Method 7196A)
Table 4
Summary of Soil Analytical Results
Supplemental LSI
Villa Heights Site
2000-2028 N. Brevard Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71197854
Sample ID:SB-16 SB-17 SB-18 SB-19 SB-20 SB-21 SB-22 SB-23 SB-24
Sample Date:
PID (ppm):4.4 1.9 3.4 0.2 6.5 2.6 4.7 4.7 1,701
Sample Interval (ft
bgs):0 - 2 0 - 2 0 - 2 0 - 2 5 - 10 2 - 4 5 - 8 5 - 8 12 - 13
Acetone 0.017 J 0.013 J <0.0061 0.023 J NA NA NA NA <0.70 25 12,000 140,000
n-Butylbenzene <0.00043 <0.00054 <0.00036 <0.00048 NA NA NA NA 0.79 4.5 78 12,000
sec-Butylbenzene <0.00069 <0.00086 <0.00058 <0.00076 NA NA NA NA 0.36 4.1 1,600 23,000
1,4-Dichlorobenzene <0.00069 <0.00086 <0.00058 <0.00076 NA NA NA NA 0.14 J 0.39 380 2,000
Ethylbenzene <0.00052 <0.00064 <0.00043 <0.00057 NA NA NA NA 0.68 13 6.1 27
Isopropylbenzene (cumene)<0.00052 <0.00064 <0.00043 <0.00057 NA NA NA NA 0.44 2.3 410 2,100
p-Isopropyltoluene <0.00043 <0.00054 <0.00036 <0.00048 NA NA NA NA 0.37 1.24 NE NE
Naphthalene <0.00034 <0.00043 <0.00029 <0.00038 NA NA NA NA 1.9 0.39 4.1 18
n-Propylbenzene <0.00052 <0.00064 <0.00043 <0.00057 NA NA NA NA 1.1 2.6 780 5,100
Toluene 0.0023 <0.00064 <0.00043 <0.00057 NA NA NA NA 0.13 J 8.3 990 9,700
1,2,4-Trimethylbenzene <0.00026 <0.00032 <0.00022 <0.00029 NA NA NA NA 7.4 12 63 370
1,3,5-Trimethylbenzene <0.00043 <0.00054 <0.00036 <0.00048 NA NA NA NA 2.5 11 56 320
o-Xylene <0.00052 <0.00064 <0.00043 <0.00057 NA NA NA NA 0.065 J 9.8 140 590
m&p-Xylene <0.00086 <0.0011 <0.00072 <0.00095 NA NA NA NA 2.7 9.8 120 500
Semi-Volatile Organic Compounds by EPA Method 8270
Acenaphthene <0.099 <0.11 <0.090 <0.11 NA NA NA NA <0.12 16 720 9000
Anthracene <0.099 <0.11 <0.090 <0.11 NA NA NA NA <0.12 1,300 3,600 45,000
Benzo(a)anthracene <0.12 <0.14 <0.11 0.35 NA NA NA NA <0.14 0.35 1.1 21
Benzo(a)pyrene <0.12 <0.14 <0.11 0.33 NA NA NA NA <0.14 0.12 0.11 2.1
Benzo(b)fluoranthene <0.12 <0.14 <0.11 0.48 NA NA NA NA <0.14 1.2 1.1 21
Benzo(g,h,i)perylene <0.11 <0.13 <0.10 0.19 J NA NA NA NA <0.13 15,600 NE NE
Benzo(k)fluoranthene <0.12 <0.14 <0.11 0.21 J NA NA NA NA <0.14 12 11 210
Bis(2-ethylhexyl)phthalate <0.11 <0.13 <0.10 <0.12 NA NA NA NA <0.13 14 39 160
Carbazole <0.099 <0.11 <0.090 <0.11 NA NA NA NA <0.12 0.74 NE NE
Chrysene <0.12 <0.14 <0.11 0.37 NA NA NA NA <0.14 36 110 2,100
Dibenz(a,h)anthracene <0.11 <0.13 <0.10 <0.12 NA NA NA NA <0.13 0.38 0.11 2.1
Dibenzofuran <0.13 <0.15 <0.12 <0.15 NA NA NA NA <0.16 10 15 210
Fluoranthene 0.11 J <0.13 <0.10 0.99 NA NA NA NA <0.13 670 480 6,000
Fluorene <0.13 <0.15 <0.12 <0.15 NA NA NA NA <0.16 110 480 6,000
Indeno(1,2,3-cd)pyrene <0.13 <0.15 <0.12 0.23 NA NA NA NA <0.16 3.9 1.1 21
1-Methylnaphthalene <0.099 <0.11 <0.090 <0.11 NA NA NA NA 0.14 J 0.11 18 73
2-Methylnaphthalene <0.12 <0.14 <0.11 <0.13 NA NA NA NA 0.18 J 3.1 48 600
Naphthalene <0.12 <0.14 <0.11 <0.13 NA NA NA NA <0.14 0.39 4.1 18
Phenanthrene <0.099 <0.11 <0.090 0.58 NA NA NA NA <0.12 134 NE NE
Pyrene <0.12 <0.14 <0.11 0.63 NA NA NA NA <0.14 440 360 4,500
RCRA Metals by EPA Method 6020 (Chromium VI by Method 7196A)
Arsenic 1.7 0.91 0.46 0.84 NA NA NA NA 1.3 5.8 0.68 3
Chromium (Total)33 68 26 31 NA NA NA NA 52 NE NE NE
Chromium VI 1.2 <0.24 <0.099 <0.23 NA NA NA NA 0.19 J 3.8 0.31 6.5
Lead 50 26 5.8 46 63 63 48 64 9 400 400 800
Mercury 0.021 J 0.051 0.01 J 0.034 NA NA NA NA 0.016 J 1.0 1.6 23
Silver 0.076 J 0.088 J 0.044 J 0.069 J NA NA NA NA 0.062 J 3.4 78 1,200
Barium 150 120 68 140 NA NA NA NA 220 580 3,100 47,000
Cadmium 0.44 <0.059 <0.047 0.057 J NA NA NA NA <0.061 3.0 7.5 110
Notes:
All samples collected on March 12, 2020
Results are shown in milligrams per kilogram (mg/kg).
ft bgs - Feet Below Ground Surface
ppm - parts per million
Only compounds detected within one or more sample are shown.
NA - Not Analyzed
NE - Not Established
Detections are indicated in bold.
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
PSRG - NCDEQ Inactive Hazardous Sites Branch Preliminary Soil Remediation Goals (Dec. 2019)
PoG - Protection of Groundwater
Shaded cells indicate the detected concentrations exceed the regulatory threshold of the corresponding color.
Volatile Organic Compounds by EPA Method 8260
PoG PSRG Residential
PSRGs
Non-Residential
PSRGs
Table 5
Summary of Groundwater Analytical Results
Supplemental LSI
Villa Heights Site
2000-2028 N. Brevard Street
Charlotte, Mecklenburg County, North Carolina
Terracon Project No. 71187854
Sample ID:TW-3 TW-4
Sample Date:3/12/2020 3/12/2020
Depth to
Water (DTW):15.0 13.9
Acetone 5.4 J <190 6,000 450,000 19,000,000
Benzene <0.18 340 1 16 69
n-Butylbenzene <0.21 74 70 NE NE
sec-Butylbenzene <0.16 25 J 70 NE NE
Chloroform 0.27 J <8.5 70 8.1 36
cis-1,2-Dichloroethylene 0.66 J <6.5 60 NE NE
Ethylbenzene <0.13 3,300 600 35 150
Isopropylbenzene (Cumene)<0.17 180 70 180 750
p-Isopropyltoluene (p-Cymene)<0.20 77 25 NE NE
Naphthalene <0.31 750 6 35 150
n-Propylbenzene <0.13 410 70 490 2,000
Tetrachloroethylene 7.2 <9.0 0.7 12 48
Toluene <0.14 31 J 600 3,800 16,000
1,2,4-Trimethylbenzene <0.18 3,400 400 50 210
1,3,5-Trimethylbenzene <0.14 870 400 35 150
m+p Xylene <0.30 11,000 500 71 300
o-Xylene <0.17 250 500 98 410
Acenaphthene <0.034 0.34 80 NE NE
Acenaphthylene <0.036 0.1 J 200 NE NE
Anthracene <0.033 0.052 J 2,000 NE NE
Carbazole <0.29 1.1 J 2 NE NE
Dibenzofuran <0.27 0.36 J 28 NE NE
2,4-Dimethylphenol <0.81 18 100 NE NE
Fluorene <0.035 0.61 J 300 NE NE
1-Methylnaphthalene <0.29 46 1 NE NE
2-Methylnaphthalene <0.063 87 30 NE NE
Naphthalene <0.26 460 6 35 NE
Phenanthrene <0.031 0.6 200 NE NE
Arsenic <0.64 1.7 10 NE NE
Barium 34 58 700 NE NE
Chromium 2 1.2 10 NE NE
Lead 0.46 J 0.51 400 NE NE
Notes:
Samples were collected on March 12, 2020.
All results are shown in micrograms per liter (µg/L).
Only compounds detected in one or more sample are shown.
Detections are indicated in bold.
J - Estimated concentration between method detection limit and reporting limit.
NE - Not established
Concentrations highlighted in yellow exceed their respective NCDEQ 2L groundwater standard.
Concentrations highlighted in orange or red exceed their respective NCDEQ VI-GWSL, but not their 2L Standard.
In the event a concentration exceeds both its 2L standard and VI-GWSL, the compound is also given in red text.
VI-GWSL - Vapor Intrusion Groundwater Screening Level (February 2018)
NCDEQ
Residential VI-GWSL
NCDEQ
Non-Residential
VI-GWSL
NCDEQ 2L
Groundwater
Standard
Analyte
Semi-Volatile Organic Compounds by EPA Method 8270
Volatile Organic Compounds by EPA Method 8260
RCRA Metals by EPA Method 6020