HomeMy WebLinkAbout22074_Gathing Motor_ MACTEC Phase I ESA 20070531Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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TABLE OF CONTENTS
EXECUTIVE SUMMARY .......................................................................................................... iii
1.0 GENERAL INFORMATION...............................................................................................1
2.0 SITE HISTORY AND SOURCE CHARACTERISTICS..................................................3
3.0 RISK CHARACTERIZATION...........................................................................................5
4.0 RECEPTOR INFORMATION............................................................................................8
4.1 WATER-SUPPLY WELLS..............................................................................................8
4.2 PUBLIC WATER SUPPLIES...........................................................................................8
4.3 SURFACE WATER.........................................................................................................8
4.4 WELLHEAD PROTECTION AREAS...............................................................................8
4.5 DEEP AQUIFERS IN THE COASTAL PLAIN REGION....................................................9
4.6 SUBSURFACE STRUCTURES .........................................................................................9
4.7 AREA LAND USE...........................................................................................................9
4.8 PROPERTY OWNERS AND OCCUPANTS.......................................................................9
5.0 GEOLOGY AND HYDROGEOLOGY ............................................................................11
5.1 TOPOGRAPHIC CONDITIONS.....................................................................................11
5.2 GEOLOGY...................................................................................................................11
5.2.1 Site Geology.......................................................................................................11
5.2.2 Regional Geology...............................................................................................11
6.0 SOIL SAMPLING RESULTS............................................................................................13
6.1 SOIL SAMPLING .........................................................................................................13
6.2 LABORATORY TEST RESULTS...................................................................................13
7.0 GROUNDWATER SAMPLING RESULTS.....................................................................15
7.1 GROUNDWATER SAMPLING ......................................................................................15
7.2 LABORATORY TEST RESULTS...................................................................................15
8.0 CONCLUSIONS AND RECOMMENDATIONS ............................................................17
9.0 REFERENCES....................................................................................................................18
TABLES
Table 2.1 – UST Information
Table 2.2 – Tank Closure Soil Analytical Summary
Table 4.1 – Owners of Properties Contiguous to Subject Site
Table 6.1 – Soil Analytical Data
Table 7.1 – Monitoring Well Installation Data
Table 7.2 – Groundwater Analytical Summary
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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FIGURES
Figure 1 – Site Vicinity Map
Figure 2 – Site Plan
Figure 3 – Aerial Photograph
Figure 4 – Well Survey Map
Figure 5 – Mecklenburg County Zoning Map
APPENDICES
Appendix A – Well Construction Records and Boring Logs
Appendix B – Field Methods
Appendix C – Laboratory Test Reports and Chain of Custody Records
Appendix D – Water Well Survey Forms
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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EXECUTIVE SUMMARY
The subject site is located at 1216, 1220, and 1222 South Tryon Street in Charlotte, North Carolina.
New Tryon, LLC engaged MACTEC Engineering and Consulting, Inc. (MACTEC) to conduct a
Phase I Limited Site Assessment (LSA) at the site. MACTEC completed a UST Closure
Assessment Report in February 2007. The results from that assessment identified total petroleum
hydrocarbons (TPH) in soil samples collected beneath two of four removed USTs (Tank 3 – Used
Oil and Tank 4 - Oil/Water Separator) that exceeded the regulatory action level established by the
North Carolina Department of Environment and Natural Resources (NCDENR).
On April 10, 2007, MACTEC installed two monitoring wells to check for the presence of
groundwater contamination at the site. Monitoring well MW-Tank3 was installed to a depth of 26
feet below ground surface (bgs) and monitoring well MW-OWS was installed at a depth of 26 feet
bgs. Soil samples were collected from the boring advanced at the MW-OWS location analyzed for
petroleum hydrocarbons. During soil cleanup activities in January 2007, MACTEC collected soil
sample “T-3 Bottom” from the base of the excavation (15 feet) for former Tank 3. Since the soil
remediation effort involved excavation of soil to a depth within five feet of the groundwater, no
additional soil samples were collected as part of the LSA. On April 18, 2007, MACTEC collected
groundwater samples from the monitoring wells for analysis.
Based on the results of our assessment activities, we offer the following conclusions:
• Concentrations of petroleum hydrocarbons identified in the soil samples did not
exceed the Residential or Industrial/Commercial MSCCs.
• The results of the groundwater analysis identified 1,2-dichloroethane at
concentrations exceeding the NC 2L standards for MW-Tank 3 and MW-OWS. The
concentrations of 1,2-dichloroethane were less than ten times the NC 2L Standards
and less than the GCL. Furthermore, VPH aromatics were identified in excess of the
NC 2L Standard in well MW-Tank 3. North Carolina General Statues - Chapter
143-B requires that the owner or responsible party prepare a “Notice of Residual
Petroleum” (NRP) to be recorded by the Register of Deeds office. The NRP would
restrict the use of groundwater at the site.
• The site is located in a light commercial and residential district. The properties within a
1,000-foot radius of the site are connected to municipal water.
Based on these findings, MACTEC requests that a Notice of No Further Action be issued by
NCDENR for this incident, contingent upon the completion of the NRP.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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1.0 GENERAL INFORMATION
The subject site is located at 1222 South Tryon Street in Charlotte, North Carolina. MACTEC
performed UST closure activities for one fuel oil Underground Storage Tank (UST), one gasoline
UST, one used oil UST, and an oil/water separator in December 2006 and January 2007. The
report was prepared to address Tanks 3 and 4 only. The closure report indicated that a
concentration of TPH, DRO was identified in soil samples collected from beneath the used oil UST
(Tank 3) at 760 parts per million and from beneath the oil/water separator (Tank 4) at 110 parts per
million. The North Carolina Department of Environment and Natural Resources (NCDENR)
requires that a Limited Site Assessment be performed under these circumstances.
Information regarding site ownership, facility information, project contacts, UST details, and
characteristics of the site is presented below.
1.1 Ownership of UST
Gathings Motor Company (no longer in business)
No address or telephone number available.
1.2 Facility Information
Facility ID#: N/A
Incident #: Not Available
Current Owner: New Tryon, LLC
Care of Insite Properties, LLC
4521 Sharon Road, Suite 100
Charlotte, North Carolina 28211
Latitude & Longitude
Of Release: N 35.21930°, W 80.85400°
1.3 Contacts
Primary Contact: Mr. Tony Pizzo
Insite Properties, LLC
4521 Sharon Road, Suite 100
Charlotte, North Carolina 28211
(704) 344-8086
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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Primary Consultant: Mr. Robert C. Foster, P.G.
MACTEC Engineering and Consulting, Inc.
2801 Yorkmont Road, Suite 100
Charlotte, North Carolina 28208
(704) 357-5530
Laboratory: Shealy Environmental Services, Inc.
106 Vantage Point Drive
West Columbia, South Carolina 29172
(803) 791-9700
North Carolina Certification No. 329
1.4 Release Information
Date release discovered: January 2007
Estimated quantity of release: Unknown
Source of release: One used oil UST and one oil/water separator
Size and contents of UST system from which release occurred: One 550-gallon used oil
UST (Tank 3) and one approximately 1,000-gallon oil/water separator (Tank 4).
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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3.0 RISK CHARACTERIZATION
The following sections are reproduced from the Limited Site Assessment Report format (Appendix
B), pages B-18 through B-20 of the Guidelines.
LIMITED SITE ASSESSMENT RISK CLASSIFICATION AND LAND USE FORM
Part I – Groundwater/Surface Water/Vapor Impacts
High Risk
1. Has the discharge or release contaminated any water supply well including any
used for non-drinking purposes?
NO.
2. Is a water supply well used for drinking water located within 1000 feet of the
source area of the discharge or release?
NO.
3. Is a water supply well used for any purpose (e.g. irrigation, washing cars, industrial
cooling water, filling swimming pools) located within 250 feet of the source area
of the release or discharge?
NO.
4. Does the groundwater within 500 feet of the source area of the discharge or release
have the potential for future use in that there is no other source of water supply
other than the groundwater?
NO.
5. Do vapors from the discharge or release pose a threat of explosion because of
accumulation of the vapors in a confined space or pose any other serious threat to
public health, public safety or the environment.
NO.
6. Are there any other factors that would cause the discharge or release to pose an
imminent danger to public health, public safety, or the environment?
NO.
Intermediate Risk
7. (a) Is a surface water body located within 500 feet of the source area of the
discharge-release?
NO.
(b) If yes, does the maximum groundwater contaminant concentration exceed the
surface water quality standards and criteria found in 15A NCAC 2B.0200 by a
factor of 10?
Not applicable.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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Is the source area of the discharge or release located with a designated wellhead
protection area as defined in 42 USC 300h(e)?
Not applicable.
8. Is the release located in the Coastal Plain Physiographic region as designated on a
map entitled “Geology of North Carolina” published by the Department in 1985?
NO.
9. Do the levels of groundwater contamination for any contaminant exceed the gross
contamination levels (GCL) established (Table 7) by the Department.
NO.
Part II - Land Use
Property Containing Source Area of Release
1. Does the property contain one or more primary or secondary residences
(permanent or temporary)?
NO.
2. Does the property contain a school, daycare center, hospital, playground, park,
recreation area, church, nursing home, or other place of public assembly?
NO.
3. Does the property contain a commercial or industrial enterprise, an inactive
commercial or industrial enterprise, or is the land undeveloped?
Yes. The property was historically developed as an automotive sales and
service facility. A car wash and finishing business currently operates on the
property.
4. Do children visit the property?
NO.
5. Is the access to the property reliably restricted consistent with its use (e.g. fences,
security personnel or both)?
YES.
6. (a) Do pavement, buildings, or other structures cap the contaminated soil?
YES. The contaminated area is covered with asphaltic-pavement as it is used
as a parking lot.
(b) If yes, what mechanisms are in place or can be put into place to ensure that the
contaminated soil will remain capped in the foreseeable future?
This land will continue to be used as a parking lot.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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7. What is the zoning status of the property?
Industrial I-2 and Mixed Use Transit Oriented Development TOD-M.
8. Is the use of the property likely to change in the next 20 years?
YES.
Part III – Land Use
Property Surrounding Source Area of Release
The questions below pertain to the area within 1500 feet of the source area of the release.
1. What is the distance from the source area of the release to the nearest primary or
secondary residence?
The nearest residences (Summit South End Square) were observed at the
adjacent property to the southeast across South Tryon Street. The apartment
complex is approximately 140 feet from the source area of the release.
2. What is the distance from the source area of the release to the nearest school,
daycare center, hospital, playground, park, recreation area, church, nursing home,
or other place of public assembly?
The adjacent properties to the northeast are multi-tenant law and medical
office buildings. A church is located approximately 600 feet northwest from
the site.
3. What is the zoning status of the properties in the surrounding area?
Surrounding properties are zoned Industrial, Mixed Use Development
District, and Mixed Use Transit Oriented Development. See Figure 4 for
zoning in the area.
4. Briefly characterize the use and activities of the land in the surrounding area.
The adjacent properties are office buildings and residential. The properties to
the northeast were occupied by Carolina Hematology and Oncology
Associates and law offices, to the southeast (across South Tryon Street) by
Camden South End apartment and parking complex (1211 South Tryon
Street), to the southwest by a office buildings and retail properties, and to the
northwest by a warehouse.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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4.0 RECEPTOR INFORMATION
Potential receptors considered, as part of the LSA, included identification of water-supply wells,
public water supplies, surface waters, wellhead protection areas, subsurface structures, land use,
and property owners and occupants. The following sections provide our results of the receptor
investigation.
4.1 Water-Supply Wells
The Mecklenburg County Department of Health, Environmental Health Division, did not identify
water supply wells within a 1,000-foot radius of the site. MACTEC personnel did not observe
water supply wells within a 1,000-foot radius of the site during an area reconnaissance. MACTEC
observed water-meter vaults along the streets within the required radius.
Results of a well survey of properties within 500 feet of the source area of the release did not
identify drinking water supply wells. Five wells used for industrial cooling water (for thermal heat
pumps) are operated by Simpson’s Lighting at 1112 South Boulevard. These wells are more than
500 feet southeast of the source area.
A well survey map is included as Figure 4.
4.2 Public Water Supplies
The site and surrounding facilities within a 1,500-foot radius are provided public water by the City
of Charlotte. Charlotte obtains its municipal water from Mountain Island Lake.
4.3 Surface Water
MACTEC did not identify a surface water body within a 1,500 feet radius of the site.
4.4 Wellhead Protection Areas
The site is not in a wellhead protection area.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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4.5 Deep Aquifers in the Coastal Plain Region
The subject site is not located in the Atlantic Coastal Plain Physiographic Province of North Carolina.
4.6 Subsurface Structures
Basements are not present at the subject site.
4.7 Area Land Use
The area within a 1,500-foot radius of the site consists of commercial and residential properties.
The zoning for the site and surrounding properties is shown on Figure 5.
4.8 Property Owners and Occupants
Contiguous property owners to the subject site are shown on Figure 3. The address of each owner is
listed in Table 4.1.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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Table 4.1 Owners Of Contiguous Properties
PARCEL NUMBER LAND OWNER AND ADDRESS PROPERTY ADDRESS
073-07-308
Roswell Apartments, LLC
PO Box 36509
Charlotte, NC 28236
1208 South Tryon Street
073-07-309
1100 South Tryon Group I LLC and
Investor LLC
3325 Healy Drive
Winston-Salem, NC 27103
1100 South Tryon Street
123-03-101
Summit Properties
PO Box 638
Addison, TX 75001
1205 South Tryon Street
073-07-210
Ratcliffe Louis G. Inc.
2019 West Sugar Creek Road
Charlotte, NC 28262
1300 & 1304 South Tryon Street
073-07-211
Beaty Investments Inc. (Trust) and
Katherine B. Canfield
6610 Old Plank Road
Charlotte, NC 28216
115 Winnifred Street
073-27-101
LLC Boulevard at Church and Bland
715 North Church Street, Suite 110
Charlotte, NC 28202
1303 South Church Street
073-27-107
Roman Catholic Diocese
PO Box 36776
Charlotte, NC 28236
1123 South Church Street
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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5.0 GEOLOGY AND HYDROGEOLOGY
The following sections describe the regional geologic conditions and the methods employed to obtain
physical data that support our discussion of the local geologic and environmental conditions.
5.1 Topographic Conditions
Based on the Charlotte East Topographic Quadrangle (Figure 1), the site is situated on a local
topographic high at approximately 750 feet above mean sea level. Based on our interpretation of
the topographic map and on-site observations, the topography in the vicinity of the site slopes to
the northwest and west.
5.2 Geology
5.2.1 Site Geology
The following interpretation of the site geology was developed based on data obtained from well
boring MW-Tank 3 and MW-OWS. The locations of the wells are shown on Figure 2.
MACTEC personnel examined soil samples during the probing and drilling performed at the site. The
ground surface was covered with asphalt. Fill material was encountered to a depth of approximately 15
feet for well boring MW-Tank 3 and 8 feet for well boring MW-OWS. Based on MACTEC’s soil
boring data, reddish brown sandy silt with pink inclusions was encountered at about 8 feet below
ground surface to the termination depth of the borings at 26 feet.
Groundwater was measured at a depth of approximately 20 feet below land surface on April 10, 2007.
A copy of the boring log, including the well construction record for the monitoring well is provided in
Appendix A.
5.2.2 Regional Geology
The site is located within the Charlotte Belt of the Piedmont Physiographic Province consisting
generally of low rounded hills and long rolling northeast to southwest trending ridges with incised
creek channels. Based on a review of the Geologic Map of North Carolina (1985), the site is
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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underlain by rocks consisting of metamorphosed volcanic rocks. No major geologic features are
documented in published literature in the site area.
Surface and subsurface drainage patterns within the Piedmont typically indicate the direction
contaminants would be transported by surface water or groundwater. The direction and movement of
groundwater through soil is dependant on soil type and the presence of relict structures and textures of
the underlying rock. Fractures, faults, folds and foliation planes affect the migration of groundwater in
rock.
Groundwater recharge within the Piedmont region generally occurs on upland areas. The residual soils
and saprolite act as an infiltration medium and reservoir for water to seep into the fractures and joints of
the underlying rock. Discharge from the system occurs at surface water features such as streams and
lakes or at the base of slopes.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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6.0 SOIL SAMPLING RESULTS
6.1 Soil Sampling
MACTEC previously excavated soil during UST closure activities to a depth of approximately 15
feet below ground surface for Tank 3. Since groundwater depth is within five feet of the closure
soil sample (T-3 Bottom collected at 15 feet), MACTEC did not collect additional soil samples as
part of the limited site assessment. On April 10, 2007, MACTEC advanced one soil boring at the
former location of Tank 4 as shown on Figure 2. In the boring, fill material was encountered to a
depth of approximately 8 feet. Reddish brown sandy silt with pink inclusions was encountered at about
8 feet below ground surface to the termination depth of the borings at 26 feet. MACTEC personnel
retained three soil samples from this boring. Soil samples were retained at depth intervals of 8 to
10 feet, 13 to 15 feet, and 18 to 20 feet. These samples were placed in laboratory-supplied jars for
delivery under chain-of-custody to Shealy Environmental Services, Inc. in West Columbia, South
Carolina. The soil samples were analyzed for volatile organic compounds (EPA Method
8260B/8270C), total lead and chromium (EPA Method 6010B), and volatile and semi-volatile
petroleum hydrocarbons (MADEP VPH and EPH). A detailed description of field methods is
presented in Appendix B.
6.2 Laboratory Test Results
Laboratory test reports and chain-of-custody forms are presented in Appendix C. The soil
sampling results are summarized in Table 6.1. This table also includes the applicable Maximum Soil
Contaminant Concentrations (MSCCs).
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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8.0 CONCLUSIONS AND RECOMMENDATIONS
Based on the results of our assessment activities, we offer the following conclusions:
• Concentrations of petroleum hydrocarbons identified in the soil samples did not
exceed the Residential or Industrial/Commercial MSCCs.
• The results of the groundwater analysis identified 1,2-dichloroethane at
concentrations exceeding the NC 2L standard from MW-Tank 3 and MW-OWS.
The concentrations of 1,2-Dichloroethane were less than ten times the NC 2L
Standards and less than the GCL. Furthermore, VPH aromatics were identified in
well MW-Tank 3 at a concentration that exceeded the NC 2L standard. North
Carolina General Statues - Chapter 143-B requires that the owner or responsible
party prepare a “Notice of Residual Petroleum” (NRP) to be recorded by the Register
of Deeds office. The NRP would restrict the use of groundwater at the site.
• The site is located in a light commercial and residential district. The properties within a
1,000-foot radius of the site are connected to municipal water.
Based on these findings, MACTEC requests that a Notice of No Further Action be issued by
NCDENR for this incident, contingent upon the completion of the NRP.
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
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9.0 REFERENCES
North Carolina Administrative Code, Title 15A, Chapter 2, Subchapter 2L, Classification and Water
Quality Standards Applicable to the Groundwaters of North Carolina; North Carolina Environmental
Management Commission, Raleigh, North Carolina, November 8, 1993.
State of North Carolina Department of Environment and Natural Resources, Division of Waste
Management, UST Section Guidelines for Assessment and Corrective Action, July 2001.
USGS 7.5-minute Topographic Map, Charlotte East, North Carolina Quadrangle, dated 1967 (photo-
revised 1988), published by the United States Geological Survey.
Geologic Map of North Carolina, dated 1985, compiled by the North Carolina Geological Survey.
MACTEC, Phase I Environmental Site Assessment, dated October 28, 2005.
MACTEC, Phase II Environmental Assessment Report, dated February 2, 2007.
MACTEC, UST Closure Report, dated February 5, 2007
Report of Phase I Limited Site Assessment May 31, 2007
1222 South Tryon Street
MACTEC Project 6228-06-3932
FIELD METHODS
Listed below are the standard field methods used during this project.
Soil Sampling and Well Installation
On April 10, 2007, soil samples were collected at selected intervals from beneath the former
excavation for the oil/water separator. MACTEC personnel collected the samples from the
sampling device using a new pair of disposable gloves.
The soil samples were placed in laboratory-prepared sample containers, marked with a unique
identifying number, placed on ice in a sample cooler, and delivered to Shealy Environmental
Services, Inc., a North Carolina certified laboratory, located in West Columbia, South Carolina for
analysis. The samples were maintained under chain-of-custody protocol.
On April 10, 2007 (see page 14), groundwater monitoring wells MW-Tank 3 and MW-OWS were
installed at the site. The borings were drilled using a hollow-stem auger drilling rig.
A Type II monitoring well was installed in each boring. The Type II well was constructed with 2-
inch diameter, Schedule 40 PVC flush-threaded casing and screen. The PVC screen and casing
were lowered into the open boreholes. A 10-foot length of slotted well screen with machined
0.010-inch slot widths and a threaded bottom plug was installed at the bottom of each well. A solid
section of PVC riser was placed above the screened interval and extended to a point equal with the
ground surface. The annular space around the well was filled with filter sand to approximately 2
feet above the top of the screen.
A seal of bentonite pellets was placed immediately above the sand pack. After hydrating the
bentonite pellets, a bentonite/neat cement mixture containing approximately 4% bentonite was
pumped down the borehole to fill the annular space from the bentonite seal to the ground surface.
The top of the well casing was equipped with a lockable, watertight well plug. A well construction
record is included in Appendix A.
Monitoring Well Groundwater Sampling
The monitoring well was developed by bailing an amount equal to 3.5 casing volumes of water
until the water’s turbidity was reduced and it was determined that the monitoring well was
functioning properly. Prior to sampling, the volume of water was measured. A MACTEC field
representative purged the well of additional water. Groundwater samples were collected using a
disposable polyethylene bailer.
The collected groundwater samples were placed in laboratory-prepared sample containers, marked
with a unique identifying number, preserved as required, placed on ice in a sample cooler, and
delivered to Shealy for analysis. The samples were maintained under chain-of-custody protocol.