HomeMy WebLinkAbout10036_South End Transit_Ornamental Awnings Phase II Report FINAL-OCR
DELIVERING SUSTAINABLE SOLUTIONS IN A MORE COMPETITIVE WORLD
Phase II Environmental Site Assessment
Ornamental Awnings Property
2303 Dunavant Street
Charlotte, North Carolina
December 2006
ERM NC, PC
8000 Corporate Center Drive
Suite 200
Charlotte, North Carolina 28226
www.erm.com
Cherokee Investment Partners
Phase II Environmental Site Assessment
Ornamental Awnings Property
2303 Dunavant Street
Charlotte, Mecklenburg County,
North Carolina
December 2006
Project No. 55685
________________________________
Alan Martin, P.G.
Project Manager
_________________________________
Thomas M. Wilson, P.G.
Principal-In-Charge
ERM NC, PC
8000 Corporate Center Drive
Suite 200
Charlotte, North Carolina 28226
(704) 541-8345
(702) 541-8416 (fax)
http://www.erm.com
ERM NC, PC i ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
TABLE OF CONTENTS
1.0 INTRODUCTION 1
1.1 BACKGROUND 1
2.0 PHASE II ASSESSMENT ACTIVITIES 2
3.0 ASSESSMENT RESULTS 4
4.0 SUMMARY AND CONCLUSIONS 6
LIST OF FIGURES
Figure 1 Topographic Site Location Map
Figure 2 Site Layout Map
Figure 3 Soil Sample Results Map
Figure 4 Groundwater Sample Results Map
LIST OF TABLES
Table 1 Monitor Well Construction
Table 2 Soil Sample Analytical Results
Table 3 Groundwater Sample Analytical Results
LIST OF APPENDICES
APPENDIX A: Soil Boring Logs
APPENDIX B: Laboratory Analytical Data Sheets
ERM NC, PC 1 ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
1.0 INTRODUCTION
On October 16 through 20, 2006, ERM NC, PC (ERM) performed a Phase II
Environmental Site Assessment (ESA) on behalf of Cherokee Investment
Partners at the Ornamental Awnings property (hereafter referred to as “the
subject site“ or “the subject property”) located at 2303 Dunavant Street, in
Charlotte, Mecklenburg County, North Carolina. The purpose of the
Phase II site investigation was to investigate potential areas of concern
identified during a previous Phase I ESA of the site conducted by ERM in
November 2005, as discussed below.
1.1 BACKGROUND
A Phase I ESA was conducted by ERM at the subject property in
November 2005. As indicated in the Phase I report, an awning
manufacturing company operated at the subject property from the early
1980s through 2006. Previous land use at the site consisted of farmland,
wooded areas and two single-family residences. The location of the
subject property is presented on Figure 1. Figure 2 presents the current
site layout. The Phase I ESA identified the following potential
environmental concern:
• Three sets of railroad spurs previously bisected the eastern portion of
the subject property. These rail spurs served multiple parcels in the
vicinity of Dunavant, Hawkins and Distribution Streets although the
contents of the previous rail cars traveling over these spurs are
unknown. It is possible that undocumented leaks or spills from tanker
cars that traversed or were temporarily staged on the subject property
may have affected soil or groundwater quality on the site.
• Two 55-gallon drums and approximately ten 5-gallon buckets were
staged along the northern property. The content of these containers is
unknown. The containers were reportedly left onsite by the previous
site tenant in the early 1980s. No staining or distressed vegetation was
observed in the vicinity of these containers.
• Several properties within a ¼ mile radius of the subject site were listed
in the database search as sites with documented groundwater or soil
contamination. The topography and suspected regional shallow
groundwater flow direction indicates contamination from these sites
should migrate away from the subject site, however, there is potential
for off-site contamination to adversely impact the subject site.
ERM NC, PC 2 ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
2.0 PHASE II ASSESSMENT ACTIVITIES
On October 16, 2006, ERM supervised the installation of two direct push
(Geoprobe®) soil borings. Both of the direct push soil borings were
converted to temporary monitor wells for purposes of collecting
groundwater samples and identifying the depth to the water table. Two
soil samples (OA-SB-1 and OA-SB-2) and two groundwater samples (OA-
GW-1 and OA-GW-2) were collected and submitted for laboratory
analysis.
The direct push soil borings and temporary monitor wells were installed
by Probe Technology, Inc. of Concord, North Carolina, using direct push,
or Geoprobe® drilling and sampling equipment. The direct push
sampling method uses a small truck or all terrain vehicle mounted
hydraulic jack mechanism to drive a 2-inch diameter hollow steel probe
(macro-core) with a polyethylene soil-sampling sleeve into the ground to
the desired depth prior to sampling. Using the macro-core sampler, soil
samples were collected continuously until the target soil sampling depth
was reached or refusal was met. All downhole sampling equipment was
cleaned via a high-temperature/high-pressure water wash (steam cleaner)
before and between each boring.
Soils were logged in the field by an ERM geologist and screened for the
presence of volatile organic compounds (VOCs) via a photo-ionization
detector (PID) and the headspace field screening method. Soil boring logs
and field screening data and can be referenced in Appendix A. Soil
samples intervals for laboratory analyses were chosen based on PID
readings, visual and olfactory observations and the suspected depth of the
potential concern.
Soil boring OA-SB-1 was advanced along the western boundary of the
subject property to assess potential impacts to soil and groundwater from
neighboring properties to the south and west. A soil sample was collected
at approximately 13 feet below ground surface. A second soil boring (OA-
SB-2) was advanced adjacent to several 55-gallon drums of unidentified
chemicals which have remained on the subject property for over 20 years.
A soil sample was collected from 2 to 4 feet below ground surface. In
general, the shallow soils at the site were comprised of clayey silts grading
to fine sandy silts at depth.
Soil samples were placed in laboratory-supplied sample containers and
then placed in a cooler with ice for storage and delivery to Prism
Laboratories of Charlotte, North Carolina for analyses. Soil samples
collected from the site were analyzed for: volatile organic compounds
ERM NC, PC 3 ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
(VOCs) by Method 8260 and Metals by EPA Methods 6010B and 7471.
ERM and Prism Laboratories adhered to appropriate chain-of-custody
procedures.
Following the completion of soil sample collection, temporary monitor
wells were installed in the OA-SB-1 and OA-SB-2 borings. The temporary
monitor wells were installed at depths of 19 feet below ground surface in
boring OA-SB-1 and 13.6 feet at OA-SB-2. These depths represent where
the direct push probe encountered saturated soil for groundwater
sampling.
Each temporary monitor well was installed with 1-inch diameter PVC well
screen and riser, filter sand and bentonite seal in general accordance with
North Carolina Well Construction Standards (15A NCAC 2C). Each well
was fitted with locking, expandable well caps. Following construction, all
new monitor wells were developed by purging a minimum of five well
bore volumes from the well utilizing a combination of a new, disposable
bailer and previously decontaminated peristaltic pump. After
development, all monitor wells were sampled using low-flow sampling
methods to minimize turbidity present in the samples and to minimize the
volume of groundwater potentially requiring special handling and
disposal procedures. Prior to purging and sampling, depth-to-
groundwater data were recorded for each monitor well. Monitor well
construction details and groundwater elevation data are presented in
Table 1.
The depth-to-groundwater ranged from 4.8 feet below ground surface in
OA-GW-1 to 3.9 feet in OA-GW-2. Based on these depth-to-ground water
measurements and local land surface topography, the groundwater flow
direction beneath the subject property appears to be to the west toward
Dunavant Street.
Groundwater samples were collected from each temporary monitor well
and analyzed for VOCs by Method 8260B and Metals by Methods 6010B
and 7471. Samples collected from each temporary well were labeled with
an identification of GW, i.e., the sample collected and labeled OA-GW-1 is
the groundwater from the boring labeled OA-SB-1.
ERM NC, PC 4 ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
3.0 ASSESSMENT RESULTS
Soil analytical results are summarized in Table 2 and groundwater
analytical results are summarized in Table 3. Sample locations and
analytical results are illustrated in Figures 3 and 4 for soil and groundwater,
respectively. Soil boring logs including field screening values are
presented in Appendix A. The laboratory analytical data reports are
presented in Appendix B. For comparison purposes, the soil results are
compared to the North Carolina Department of Environment and Natural
Resources (NCDENR) Division of Water Quality – Aquifer Protection
Section’s Soil-to-Groundwater Cleanup Levels or Division of Waste
Management – Superfund Section Inactive Hazardous Sites Branch
Remediation Goal (IHSB RG) levels. ERM also compared the metals
concentrations in soils to the common range of naturally occurring metals in
soils, as published in EPA’s Hazardous Waste Land Treatment, SW-874, Table
6.46, dated April 1983. Also presented for comparison purposes are
naturally occurring concentrations of common metals in the eastern United
States as reported by the United States Geological Survey (USGS). These
values are shown in Table 2 of this report, as applicable. Groundwater
analytical results are compared to the North Carolina Groundwater
Standards (NC 15A NCAC 2L 0.0202(g)) which are identified in Table 3.
Soils
Soil samples (OA-SB-1 and OA-SB-2) were submitted to the laboratory for
VOC and metals analyses. No detectable concentrations of VOCs were
reported in either of the soil samples. Low concentrations of metals were
detected in both soil samples. Chromium (total) was detected in the OA-
SB-2 soil sample at 28 milligrams per kilogram (mg/kg) which is slightly
above the NCDENR Aquifer Protection Section’s Cleanup Level of 27
mg/kg for this naturally occurring mineral. No potential source of
chromium has been identified in this area and the concentration detected
in the OA-SB-2 soil is within the range of naturally occurring
concentrations in Piedmont soils. No other metals were detected at levels
above the applicable Clean-Up Levels.
Groundwater
The groundwater levels in temporary monitor wells OA-GW-1 and OA-
GW-2 were approximately 5.1 feet and 4.7 feet below ground surface,
respectively. Groundwater samples collected from the temporary wells
were submitted to the laboratory for VOC and metals analyses.
Trichloroethene (TCE) was detected in the OA-GW-1 groundwater sample
at 5.1 micrograms per liter (µg/L) and in the OA-GW-2 groundwater
ERM NC, PC 5 ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
sample at 44 µg/L. The North Carolina Groundwater Standard for
trichloroethene is 2.8 µg/L. Other VOCs detected in the OA-GW-1 and
OA-GW-2 groundwater samples did not exceed the applicable North
Carolina Groundwater Standards. Low concentrations of barium, lead
and selenium were detected in the groundwater samples in concentrations
below the applicable North Carolina Groundwater Standards. No
potential source of the trichloroethylene has been identified in this area.
As noted above, no VOCs were detected in soil samples collected from the
subject property.
4.0 SUMMARY AND CONCLUSIONS
On October 16-20, 2006, ERM conducted a Phase II ESA to evaluate
subsurface conditions at the Ornamental Awnings property located at
2303 Dunavant Street, Charlotte, Mecklenburg County, North Carolina. A
summary of the findings of the Phase II ESA is provided below.
Two soil samples were collected via direct push methods to evaluate soil
quality at the subject property. Chromium was detected in one sample at
28 mg/kg which slightly exceeds the NCDENR Aquifer Protection
Section’s Cleanup Level of 27 mg/kg. No potential source of chromium
has been identified in this area and the detected concentration is within
the range of naturally occurring concentrations of chromium in Piedmont
soils. No additional investigation or remediation of the chromium
detected in the soil in this area is warranted. No other metals or VOCs
were identified in excess of the NCDENR Aquifer Protection Section’s
Cleanup Levels.
Two groundwater samples were collected from temporary monitor wells
installed at the soil boring locations. Groundwater flow direction appears
to be to the west/southwest. Trichloroethene was detected in both
samples in excess of the North Carolina Groundwater Standard. The
maximum concentration of trichloroethene detected is 44 µg/L. The
North Carolina Groundwater Standard for trichloroethene is 2.8 µg/L.
No potential source of the trichloroethene in the groundwater has been
identified in this area. No VOCs were detected in the soil sample at this
location. Additionally, the Phase I ESA did not identify any known
sources of TCE contamination on the immediately adjacent properties. No
other VOCs or metals were detected in the groundwater samples in excess
of the North Carolina Groundwater Standards.
ERM NC, PC 6 ORNAMENTAL AWNINGS PHASE II REPORT FINAL.DOC
Figures
Source: Charlotte East, NC 7.5 Minute Topographic Quadrangle; 1988; Contour Interval = 10 feet
Figure
ERM NC, PC
CHARLOTTE, NORTH CAROLINA
ORNAMENTAL AWNINGS (JGI of NC, LLC)
2303 DUNAVANT STREET
SITE LOCATION MAP
1
0 0.1 0.2 0.3 0.4 0.5 mi
SITE
Not To Scale
FIGURE
2ERM NC, PC
CHARLOTTE, NORTH CAROLINA
ORNAMENTAL AWNINGS (JGI of NC, LLC)
2303 DUNAVANT STREET
SITE LAYOUT MAP
LIGHT RAIL
CONSTRUCTION
FACILITY
BUILDING
PROPERTY
BOUNDARY
MURRAY
SUPPLY
COMPANYFLORAL
TRENDS
OSM
FURNITURE
55-GALLON
DRUMS
(UNKNOWN
CONTENTS)STORAGE
SHED
FORMER
RAILROAD
SPURS
GEORGIA-
CAROLINA
PRODUCTS
WELDERS SUPPLY
Not To Scale
FIGURE
ERM NC, PC 3CHARLOTTE, NORTH CAROLINA
SOIL SAMPLE LOCATIONS & RESULTS
ORNAMENTAL AWNINGS (JGI of NC, LLC)
2303 DUNAVANT STREET
LIGHT RAIL
CONSTRUCTION
FACILITY
BUILDING
PROPERTY
BOUNDARY
MURRAY
SUPPLY
COMPANY
FLORAL
TRENDS
FORMER
RAILROAD
SPURS
GEORGIA-
CAROLINA
PRODUCTS WELDERS
SUPPLY
OA-SB-1 (13') __ RG
VOCs
All Compounds
Metals
Arsenic
Barium
Cadmium
Chromium
Lead
Mercury
All other metals
ND
0.57 J
98
0.36 J
3.5
2.6
0.003 J
ND
NE
NE
848
NE
27
270
NE
NE
QTM-SB-1 (Depth in Feet) RG
Detected soil contaminant concentrations in mg/kg
with Regulatory Standards (Maximum Soil
Contaminant Concentrations). Concentrations
above regulatory standards shown in bold font.
Soil Sample Location
ND Not Detected
NE Not Established
OA-SB-2 (2') RG
VOCs
All Compounds
Metals
Arsenic
Barium
Cadmium
Chromium
Lead
Silver
Mercury
All other metals
ND
3.5
310
0.97
28
6.5
0.33 J
0.0055 J
ND
NE
NE
848
NE
27
270
NE
NE
NE
Not To Scale
FIGURE
ERM NC, PC 4CHARLOTTE, NORTH CAROLINA
GROUNDWATER SAMPLE LOCATIONS & RESULTS
ORNAMENTAL AWNINGS (JGI of NC, LLC)
2303 DUNAVANT STREET
LIGHT RAIL
CONSTRUCTION
FACILITY
BUILDING
PROPERTY
BOUNDARY
MURRAY
SUPPLY
COMPANY
FLORAL
TRENDS
FORMER
RAILROAD
SPURS
GEORGIA-
CAROLINA
PRODUCTS
WELDERS
SUPPLY
QTM-GW-1 Results Summary 2L STD
Detected groundwater contamninant concentrations in µg/L
with regulatory standards. Concentrations above regulatory
standards shown in bold font.
Groundwater Sample Location
ND Not Detected
NE Not Established
OA-GW-1 2L STD
VOCs
Methyl t-butyl ether
Chloroform
Trichloroethene
All other VOCs
Metals
Barium
Lead
All other metals
0.87 J
1.1
5.1
ND
52
2.0 J
ND
200
70
2.8
NE
2,000
15
NE
OA-GW-2 2L STD
VOCs
Methyl t-butyl ether
Chloroform
Trichloroethene
Trifluoromethane
cis-1,2 Dichloroethene
1,1-Dichloroethene
All other VOCs
Metals
Barium
Lead
Selenium
Mercury
All other metals
ND
0.76 J
44
10
1.4
0.91 J
ND
92
1.6 J
21
ND
ND
200
70
2.8
2,100
70
7
NE
2,000
15
50
1,050
NE
Tables
TA
B
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1
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23
0
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l
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(f
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)
Sc
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a
l
(f
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B
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S
)
Bo
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m
o
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l
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(f
e
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B
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S
)
Gr
o
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Su
r
f
a
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v
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(f
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)
To
p
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f
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s
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v
a
t
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(
f
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)
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(f
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)
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(f
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v
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(f
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Free Product
Th
i
c
k
n
e
s
s
(feet)Comments
OA
-
G
W
-
1
1
0
/
1
6
/
0
6
1
0
/
2
0
/
0
6
9
.
0
0
1
1
-
2
1
2
1
8
6
.
4
8
8
6
.
7
8
4.
8
0
5
.
1
0
8
1
.
6
8
N
o
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e
1
"
P
V
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e
m
p
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r
y
m
o
n
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t
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w
e
l
l
OA
-
G
W
-
2
1
0
/
1
6
/
0
6
1
0
/
2
0
/
0
6
3
.
6
5
8
-
1
8
1
8
.
0
8
6
.
2
0
8
7
.
0
5
3.
8
5
4
.
7
0
8
2
.
3
5
N
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1
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p
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(f
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S
)
Arsenic
Barium
Cadmium
Chromium (Total)
Lead
Silver
OA
-
S
B
-
1
1
0
/
1
6
/
0
6
1
3
'
31
.
3
ND
0.
5
7
J
9
8
0
.
3
6
J
3
.
5
2
.
6
N
D
0
.
0
0
3
0
J
OA
-
S
B
-
2
1
0
/
1
6
0
6
2
'
<1
ND
3.
5
3
1
0
0
.
9
7
28
6.
5
0
.
3
3
J
0
.
0
0
5
5
J
NE
4
.
4
N
E
7.
4
2
4
,
0
0
0
/
3
0
4
0
0
7
8
4
.
6
NE
N
E
8
4
8
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2
7
2
7
0
N
E
N
E
NE
0
.
3
9
0
5
,
3
7
5
3
7
.
0
2
1
1
4
0
0
3
9
1
6
.
1
1
NE
1
.
5
9
6
6
,
5
7
7
4
5
1
4
4
8
8
0
0
5
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1
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1
.
6
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Barium
Appendix A
Soil Boring Logs
Stratigraphy Legend Abbreviations
Concrete/Gravel HA - Hand auger
silty CLAY GP - Geoprobe
clayey SILT TD - Total Depth of Boring
silty SAND BGS - Below Ground Surface
clayey SAND DTW- Depth to Water
Water table level Logged by:Thomas Fisher - ERM
Boring I.D.
Depth
Interval
(feet)
VOCs
(ppm)Gr
a
p
h
i
c
L
o
g
Sample Description
OA-SB-1 0-0.5 23.0 Concrete
10/16/2006 0.5-2 61.1 Gray silty CLAY
0-4' HA 2-5 66.9 Gray clayey SILT
4'-23' GP 5-12 52.9 Brown silty fine SAND with a trace of weathered manganese.
12-16 83.3 Tan silty fine to medium SAND.
113.0
124.0
Screen 16-23 97.1 White and tan silty SAND; saprolite
Interval 95.3 coarse grave layer at 18' (0.5" thick)
11' - 21'101.0 moist at 20'.
53.3
Boring terminated at 23' and the well was set at 21' BGS.
DTW = 5.10' BTOC on October 20,2006.
OA-SB-2 0-0.5 3.5 Concrete
10/16/2006 0.5-1 10.0 Orange clayey SAND
0-4' HA 1-4 18.9 Lt. orange clayey SILT
4'- 19.5' GP 4-14 24.3 Brown silty fine SAND
23.0
16.8 moist at 12'
17.8
Screen 14-19.5 16.6 White and Tan silty SAND; saprolite
Interval NR
8'-18' NR
Boring terminated at 19.5 and the well was set at 18 BGS.
DTW = 4.70' BTOC on October 20, 2006.
SOIL BORING LOGS - Ornamental Awnings, Charlotte, Mecklenburg County, North Carolina
Mo
n
i
t
o
r
W
e
l
l
Ornamental Awnings boring.xls:Boring Log Page 1 of 1 12/27/2006
Appendix B
Laboratory Analytical Data Sheets