10042_Southside_Prpty_Soil_Mgmt_Plan_Phase_I

Phase I Soil Management Plan
Carolina Metals Site

2208-2222 South Blvd.
Charlotte, North Carolina

Brownfields Project No. 10042-06-60

H&H Job No. SLS-001
November 19, 2012
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S:\AAA-Master Projects\Stiles - SLS\SLS-001 South Blvd\SMP\Soil Mgmt Plan Phase I.doc
Phase I Soil Management Plan
Carolina Metals Site
2208-2222 South Blvd.
Charlotte, North Carolina
H&H Job No. SLS-001

Table of Contents
Section Page
1.0 Introduction ................................................................................................................ 1 
2.0 Environmental Action Objectives ............................................................................ 2 
3.0 Previous Sampling Data ............................................................................................ 3 
4.0 Proposed Environmental Action .............................................................................. 4 
4.1 Procedures to Manage Shallow Soil Based Upon Known Data .............................. 4 
4.2 Procedures to Manage Soil if Unexpected Conditions Identified ............................ 4 

5.0 Plan for Additional Soil Characterization ............................................................... 8 

List of Tables

Table 1 Summary of Soil Analytical Data

List of Figures

Figure 1 Overall Grading Plan, Previous Sample Locations, and Proposed Soil
Borings
Figure 2 Phase I Soil Management Plan Excavation Areas

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Phase I Soil Management Plan
Carolina Metals Site
2208-2222 South Blvd.
Charlotte, North Carolina
H&H Job No. SLS-001

1.0 Introduction

Hart & Hickman, PC has prepared this Phase I Soil Management Plan (SMP) for the Carolina
Metals Brownfields site located at 2208-2222 South Blvd. in Charlotte (Brownfields Project ID
10042-06-60). The purpose of the SMP is to present measures to address soil that will be
excavated during redevelopment of the site.

The subject property is 4.16 acres in area and contains an approximate 16,000 sq ft commercial
building located in the northeastern portion of the site. Four other buildings were previously
located at the site but have been demolished, although their foundations remain. The site is
bordered to the west by the Charlotte light rail line with residences located beyond, to the south
by vacant land (which is a Brownfields site), to the north by the Atherton Lofts live/work
condominiums and a bank, and the east by South Blvd. with a Lowe’s Home Improvement
Center located beyond.

Environmental action objections for the SMP are presented in Section 2.0. A brief summary of
known site conditions including previous soil assessment information for the property is
provided in Section 3.0. Soil management considerations based upon the existing soil
assessment data is provided in Section 4.0, and proposed assessment activities to determine
management options for soil which has not been previously characterized through sampling and
which it is anticipated will be removed from the site is provided in Section 5.0.
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2.0 Environmental Action Objectives

The current redevelopment plans for the site include demolition of the existing structure and
foundations and construction of a large commercial building that will be used for retail purposes
by several tenants. The remainder of the property will primarily be paved access areas, although
there will be some landscape strips. A two-level subterranean parking structure will underlie the
commercial building, with 1.5 levels below ground that will be mechanically vented per code.

The grading plan calls for net export of approximately 38,800 cubic yards of soil from the site.
A grading plan with anticipated cut and fill depths and areas is provided as Figure 1. Cut areas
and depths are shown in red, and fill areas and depths are shown in green. Cut depths generally
range from 10 to 23 ft from current grade in the central and eastern portions of the site to less
than 1 to 3 ft below current grade in the northern portion of the site. Fill depths are primarily in
the west-central and southern portions of the site and range from less than 1 ft to approximately
11 ft from current grade.

Actions described in this SMP are intended to be protective of site construction/utility workers
and future site workers. Casual site visitors such as customers visiting the property are not
expected to be present at the site for a sufficient length of time that their exposure would be more
than that of a person working at the site. Exposure to contaminated groundwater was evaluated
as a potential exposure pathway, but was not deemed a likely exposure pathway because
previous sampling indicates that the elevation of groundwater should be below the excavation
grade of the development.
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3.0 Previous Sampling Data

H&H evaluated previous soil assessment data to evaluate what areas of the expected cut soils
have been previously sampled and to propose a plan to manage these soils. The results of the
previous assessment activities are summarized below.

In July 2000, 14 soil borings were advanced at the site. The locations of the soil borings, labeled
GP-4 through GP-15, GP-17, and GP-18 are indicated in Figure 1. Additional assessment was
conducted in 2006 at three previous sample locations to speciate chromium concentrations
detected in the 2000 sampling. Soil samples were collected at depths of 0-4 ft from all of the
borings for laboratory analysis except deeper samples were collected at depths of 4-8 ft at boring
locations GP-13 and GP-15.

Results of analysis of the samples are presented in Table 1. As indicated in Table 1, no
compound concentrations were detected above North Carolina Department of Environment and
Natural Resources (DENR) Residential or Industrial/Commercial Soil Remediation Goals
(SRGs) except for the 4-8 ft depth sample in GP-15 located in the western portion of the site. In
this sample, low concentrations of several polynuclear aromatic hydrocarbons (PAHs) were
detected above the SRGs.

Based upon the existing soil analytical data, shallow soil in the southern and western portions of
the site is not impacted above Residential SRGs, except for an isolated area near sample GP-15
in the west-central portion of the site.

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4.0 Proposed Environmental Action

4.1 Procedures to Manage Shallow Soil Based Upon Known Data

H&H has developed a Phase I SMP based upon the existing soil analytical data for the site. Soil
in the following areas will be managed as described below:

1. Cut soil in the area enclosed in dashed red lines on Figure 2 will be excavated to a depth
of 5 ft, and soil in the area enclosed in dashed purple lines on Figure 2 will be excavated
to a depth of 3 ft. Soil from both of these areas will be transported to the adjacent
Cherokee Southline Brownfields project located at 2300 and 2316 South Blvd (which is
located south of the Carolina Metals site) and used for fill. The proposed use of the
Cherokee Southline project is residential and we understand that a separate SMP has been
submitted for the Cherokee Southline site to include using fill from the subject site. The
volume of this soil is approximately 8,900 cubic yards as indicated in Figure 2.

2. Cut soil in the area of previous sample location GP-15 as depicted on Figure 1 will be
used for on-site fill either in the southern portion of the site or in the adjacent fill area to
the east of sample GP-15. Both of these areas will be covered with pavement after
completion of the site construction activities.

A sampling plan to evaluate other areas of excess cut soil at the site is included in Section 5.0
below.
4.2 Procedures to Manage Soil if Unexpected Conditions Identified

Although impacted soil is not expected to be encountered during excavation activities, if
unknown soil impacts are encountered, the procedures below will be implemented.

1. If obvious evidence of soil impact is encountered during grading and/or utility work (such
as unusual soil odors or soil staining), excavation will proceed only as far as needed to
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allow grading and/or construction of the utility to continue and/or only as far as needed to
allow alternate corrective measures described in this SMP to be taken. In addition, DENR
will be contacted within 48 hours to notify them of the unusual condition. Suspect
impacted soil will not be transported to the adjacent Cherokee Southline project site unless
it has been characterized and approval is granted by DENR and the Cherokee Southline
property owner.

2. Suspect impacted soil excavated during grading and/or utility construction may be placed
in fill areas which will be covered with impervious materials. If this is conducted, then
the location of such soil will be documented for future reference. Suspect impacted soil
may also be stockpiled and covered in a secure area. If such soil is to be transported off-
site, the soil will be sampled for laboratory analysis and results evaluated to determine the
appropriate off-site disposition of the stockpiled soil.

3. If excavation of obviously impacted soils occurs, sampling will be conducted for purposes
of recording areas of impacts remaining at the site, unless DENR agrees otherwise. It is
anticipated that confirmation samples will be collected from impacted fill material placed
on-site and at regular intervals along the base and the sidewalls of a given excavation.
The specific analyses to be performed will be dependent upon the expected type of soil
impact encountered and will be discussed with DENR prior to sample analysis.

4. If determined to be warranted, samples will also be used to determine the appropriate
measures for soil beyond the excavation limits required for grading and/or utility line
installation or removal. Such corrective measures are specified in the items below. In all
cases, areas of remaining obvious soil impact will be noted on project records.

5. For surface soil (i.e., soil less than 2 ft in depth below finished ground elevation) that is to
remain in place with compound concentrations above Commercial/Industrial SRGs and
background levels, corrective actions will provide for a barrier between future site
visitors/occupants/workers. The barrier may be a building, paving, hardscape surface, or
clean soil/landscaping of a 2 ft minimum thickness.

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6. For subsurface soil (soil that is greater than 2 ft in depth below finished ground elevation)
that is to remain in place with compound concentrations above Commercial/Industrial
SRGs and background levels, no corrective action will be performed, expect those
addressed in this SMP for potential future soil excavation activities.

7. Contaminated soil above the DENR Commercial/Industrial SRGs can be moved to an
alternate on-site location provided the soil is placed under a barrier as described above.
Where requested by DENR, existing data or supplemental analyses will be used to
confirm the soil to be moved is not characteristically hazardous.

8. If water gathers in an open excavation, the accumulated run-off will be allowed to
evaporate, used for dust control, or disposed off-site. In the event that soil and/or water
within an excavation cannot be dried adequately for construction purposes using the
methods described above, the soil may be amended with clean soil, aggregate, drying
agents, and/or stabilizing agents to achieve the desired geotechnical qualities.
Amendment may be conducted inside or outside the excavation and the material replaced
into the excavation.

9. If soil from an impacted area is to be transported off-site, it will be profiled based on
existing site data and other analyses as may be required by the receiving locations, and
transported to an appropriate location. DENR will be notified of the disposition of
impacted soil from the site.

10. If a sub-grade feature or pit is encountered and does not require removal for geotechnical
or construction purposes, it will be filled with soil or suitable fill and construction will
proceed. Where appropriate, the bottom may be penetrated before back filling to prevent
fluid accumulation. If the pit has waste in it, the waste will be set aside in a secure area
and will be sampled and disposed off-site. If the pit must be removed and the observed
waste characteristics indicate the concrete may potentially be contaminated to a significant
degree, the concrete will either be placed on-site under an impervious surface and its
location documented, or it will be sampled and characterized for off-site waste disposal
purposes.
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11. If buried piping is encountered and must be removed to allow construction to proceed, the
contractor will inspect the pipe for fluids, collect and sample fluids where potential
contamination is suspected, and look for signs of a release using field methods.

12. In the event that impacts uniquely associated with an underground storage tank (UST)
release are found to be present on the subject site, they will be addressed as required by
DENR’s Brownfields and UST Sections.

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5.0 Plan for Additional Soil Characterization

H&H proposes to collect additional soil samples to characterize excess cut soil at the site which
has not been previously sampled. The sampling plan includes collection of deeper soil samples
in cut areas below those areas where previous shallow sampling was conducted, and collection of
shallow and deeper samples in cut areas where no previous sampling has been conducted.

Soil borings will be advanced with a direct push technology (DPT) rig. Soil samples will be
screened during collection with a photoionization detector (PID) and for evidence of odors or
staining. Based upon the field screening data, approximate 4 ft long samples will be collected
with the DPT for laboratory analysis from the depth intervals specified below. Soil samples
collected for laboratory analysis will be biased to those intervals with evidence of field impact, if
identified.

The locations of the proposed soil borings are indicated in Figure 1 and are described below:
 Soil borings A and B will be advanced in areas where shallow soils have been previously
assessed to a depth of 4 ft and cut depths are approximately 11 ft. Therefore, a soil
sample from each of these borings will be collected at a depth in the range of 6 to 10 ft
below current ground level.
 Soil borings C and E are located in areas where previous samples have not been collected
and where excavation depths up to approximately 23 ft below current grade are planned.
Two soil samples will be collected from these borings, one will be collected from a 4-ft
long interval in the range of 0-10 ft, and a second sample will be collected from a 4-ft
long interval in the range of 10-20 ft.
 Soil boring D is located in area where previous samples have not been collected and
where excavation depths are up to approximately 16 ft below current grade. Two soil
samples will be collected from this boring, one will be collected from a 4-ft long interval
in the range of 0-8 ft, and a second sample will be collected from a 4-ft long interval in
the range of 8-16 ft.
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The soil samples (total of eight) will be analyzed for the following:
 Volatile organic compounds (VOCs) by EPA Method 8260
 PAHs by EPA Method 8270
 The following metals: arsenic, cadmium, chromium, hexavalent chromium, lead, and
mercury.

Following completion of the soil assessment activities, H&H will prepare a Phase II SMP which
will present the results of the additional soil sampling and the proposed management of the
additional excess cut soil based upon the results of the soil sampling. Expected management
options are likely to include transfer of additional soil to the adjacent Southline Cherokee
Brownfields site, export to a third party fill site, and/or export to a permitted landfill.

Table 1Summary of Soil Analytical Data2208-2222 South Blvd.Charlotte, North CarolinaH&H Job No. SLS-001
S:\AAA-Master Projects\Stiles - SLS\SLS-001 South Blvd\SMP\Data Tables.xlsm11/19/2012
Table 1 (Page 1 of 1)Hart & Hickman, PC
Sample ID GP-4 GP-5 GP-6 GP-7 GP-8 GP-9 GP-10 GP-11 GP-12 GP-13 GP-14 GP-15
Depth (ft bgs)0-4 0-4 0-4 0-4 0-4 0-4 0-4 0-4 0-4 4-8 0-4 4-8 0-4 0-4 0-4 0-4 6-8 6-8
Sample Date 7/17/2000 7/18/2000 7/17/2000 7/19/2000 7/17/2000 7/17/2000 7/17/2000 7/17/2000 7/17/2000 7/18/2000 7/18/2000 7/18/2000 7/18/2000 3/11/2008 7/18/2000 3/11/2008 7/20/2006 3/11/2008Units(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)(mg/kg)
VOCs (8260B)
All ND All ND All ND All ND All ND All ND All ND All ND All ND All ND All ND All ND All ND NA All ND NA NA NA
SVOCs (8270C)NA NA NA NA
Fluoranthene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 <0.44 0.85 <0.43 <0.44 460 4,400
Phenanthrene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 0.80 0.49 <0.43 <0.44 NE NE
Pyrene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 <0.44 1.0 <0.43 <0.44 340 34,00Chrysene<0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 0.56 0.53 <0.43 <0.44 15 210
Fluorene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 0.63 <0.35 <0.43 <0.44 460 4,400Benzo(a)anthracene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 <0.44 0.49 <0.43 <0.44 0.15 2.1
Benzo(b)fluoranthene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 <0.44 0.56 <0.43 <0.44 0.15 2.1Benzo(a)pyrene <0.42 <0.45 <0.48 <0.47 <0.43 <0.44 <0.44 <0.48 <0.42 <0.44 <0.44 0.48 <0.43 <0.44 0.015 0.21
Metals (6010/7471A/7196)
Arsenic <0.32 <0.34 <0.37 <0.36 <0.33 <0.34 <0.34 <0.36 <0.32 <0.33 <0.33 <0.27 <0.33 NA <0.33 NA <0.130 NA 0.39 1.6
Barium 43 35 58 40 7.2 70 16 17 20 36 50 94 250 NA 190 NA NA NA 3,000 38,000Cadmium12.1 1.6 2.5 0.67 1.5 1.1 4 1.5 2.4 2.7 1.2 1.4 NA 1 NA NA NA 14 160
Total Chromium 4.1 16 25.0 37.0 29.0 2.2 18 23 13 41 40 17 47 124 90 59.8 44.5 11.8 NE NE
Hexavalent Chromium NA NA NA NA NA NA NA NA NA NA NA NA NA <2.56 NA <2.57 NA <2.41 0.29 6
Trivalent Chromium NA NA NA NA NA NA NA NA NA NA NA NA NA 124 NA 59.8 NA 11.8 24,000 100,000
Lead 14 12 14 10 2.3 2.2 4.1 12 7.3 10 14 28 1.5 NA 0.79 NA NA NA 400 800Mercury<0.025 <0.027 0.039 0.031 <0.026 0.046 0.034 0.034 0.036 0.28 0.29 0.078 <0.026 NA 0.036 NA NA NA 5 62
Selenium 1.1 2.2 1.8 2.7 <0.33 1.5 0.71 4 1.6 3 3 1.7 1.5 NA 0.99 NA NA NA 78 1,000Silver<0.13 <0.14 <0.15 <0.14 <0.13 <0.14 <0.14 <0.14 <0.13 <0.13 <0.13 <0.11 <0.13 NA <0.13 NA NA NA 78 1,000
Notes:Green highlighting indicates concentration exceeds Residential SRGOrange highlighting indicates concentration exceeds Commercial/Industrial SRGSoil Remediation Goals (SRGs) from North Carolina Department of Environment and Natural Resources (DENR) Inactive Hazardous Sites Branch (IHSB) Preliminary SRG Table dated July 2012. Only those organic compounds detected in at least one sample shown aboveVOCs = volatile organic compounds; SVOCs = semi-volatile organic compoundsNE = not established; NA = Not analyzed; ND = Not detectedmg/kg = milligrams per kilogram
DENR IHSB Residential Use SRG DENR IHSB Industrial Use SRG
Regulatory Screening Levels
GP-17/HA-1 GP-18/HA-2
Site Background Soil Sample
BG-2/HA-3
Figure 1
Notes:
1.Green numbers are
depth of fill
2.Red numbers are
cut thickness
3.EG = Existing Grade
4.SD = Sample Depth
5.ED = Excavation
Elevation
6.Proposed Additional
Soil Boring Location
A
B
C
D
E
GP-15 Area
Figure 2