HomeMy WebLinkAbout18036_Hendrick Durham Auto Mall_Ltd Phase II ESA_Parcel 2_2014.11.06
LIMITED PHASE II ENVIRONMENTAL
SITE ASSESSMENT REPORT
PARCEL 2 – DURHAM GATEWAY CENTER
409 SOUTH ROXBORO STREET
DURHAM, NORTH CAROLINA
MID-ATLANTIC ASSOCIATES JOB NO. 000R2618.01
Prepared For:
Mr. Mike Underwood
Woodfield Acquisitions, LLC
11425 Horseman’s Trail
Raleigh, NC 27613
Prepared By:
Mid-Atlantic Associates, Inc.
409 Rogers View Court
Raleigh, North Carolina 27610
November 6, 2014
TABLE OF CONTENTS
1.0 INTRODUCTION ..................................................................................................... 1
2.0 SUMMARY OF SAMPLING ACTIVITIES ................................................................ 1
2.1 Soil Sampling Activities ......................................................................................... 1
2.2 Groundwater Sampling Activities .......................................................................... 2
3.0 SUMMARY OF LABORATORY TEST RESULTS ................................................... 3
4.0 CONCLUSIONS AND RECOMMENDATIONS ....................................................... 3
DRAWINGS
Drawing 1 Topographic Site Map
Drawing 2 Soil Boring and Monitoring Well Location Map
Drawing 3 Estimated Water Table Elevation Map – October 25, 2014
TABLE
Table 1 Soil Sample Field Screening Results and Monitoring Well Details
Table 2 Soil Sampling Test Results
Table 3 Groundwater Sampling Test Results
Table 4 Temporary Monitoring Well and Groundwater Elevations
APPENDICES
Appendix A Soil Boring Logs
Appendix B Laboratory Analytical Reports and Chain-of-Custody Records
1.0 INTRODUCTION
In accordance with proposal No. P14R-7009R, dated October 15, 2014, Mid-Atlantic
Associates, Inc. (Mid-Atlantic) has prepared this Limited Phase II Environmental Site
Assessment Report for the property located at 409 South Roxboro Street in Durham,
North Carolina (Drawing 1). This work was conducted based on the initial findings of a
Phase I Environmental Site Assessment (Mid-Atlantic’s Phase I Environmental Site
Assessment Report dated November 7, 2014), which identified recognized
environmental conditions (RECs) associated with the current and historical use of the
subject site as an automotive sales and service facility with multiple petroleum
aboveground storage tanks (ASTs), the documented releases at the northern and
eastern adjacent properties and the current and/or historical industrial/commercial
operations on the southeastern adjacent property. Additionally, interview information
obtained during Mid-Atlantic’s Phase I assessment indicated that a considerable
amount of fill material, from an unknown source(s), was utilized during the
redevelopment of the subject site approximately 20 years ago. The objective of our
scope of services was to evaluate if the conditions noted above had adversely-impacted
the site.
2.0 SUMMARY OF SAMPLING ACTIVITIES
2.1 Soil Sampling Activities
On October 24, 2014, Mid-Atlantic mobilized to the site to oversee the advancement of
five soil borings (SB-1 through SB-5) and installation of five temporary groundwater
monitoring wells (TMW-1 through TMW-5). Soil boring and temporary well installation
services were provided by Quantex, Inc. of Raleigh, North Carolina.
Soil borings SB-1 and SB-2 were placed on the northern border and northeastern portion
of the subject site, respectively, to assess if off-site documented releases had potentially
migrated on to the subject site. Soil boring SB-2 was also located in the approximate
former location of Durham Hosiery Mills No. 2 identified on historical Sanborn fire
insurance maps from 1907, 1913 and 1937 reviewed during Mid-Atlantic’s Phase I
assessment. SB-4 was placed adjacent to a covered area on the eastern exterior of the
on-site building that contained multiple petroleum ASTs. SB-5 was located adjacent to an
on-site 3,000 gallon gasoline AST. SB-3 was originally designated for the interior of the
automobile maintenance facility. It was relocated to the exterior of the facility, along the
southern property boundary, after Mid-Atlantic and Quantex personnel determined that
air-rotary drilling was needed due to shallow bedrock.
Using a GeoProbe “macrocore” sampling device and direct push technology (DPT),
continuous soil samples were scanned for the presence of volatile organic compounds
(VOCs) using a toxic vapor analyzer (TVA), which utilizes a flame ionization detector
(FID). Mid-Atlantic did not observe elevated FID readings from the soil samples scanned
Limited Phase II Environmental Site Assessment Report November 6, 2014
Parcel 2 – Durham Gateway Center Page 2
Durham, North Carolina
from all soil boring locations (Table 1). In general, the lithology at the site consisted of fine
sandy clays and clayey silts. Rocks and debris were noted in the fill material from boring
SB-2 which was installed at the former Durham Hosiery Mills No. 2. Fill material
consisting of sandy clays was identified in all borings. Auger refusal, due to the presence
of bedrock, was encountered at 13 feet at SB-1, 19 feet SB-2, seven feet at SB-3 and two
feet at SB-4 and SB-5. Soil boring logs are provided in Appendix A.
Soil samples were collected in laboratory-supplied containers, packed into an ice-filled
cooler and transported under chain-of-custody from the subject site to Prism Laboratories,
Inc. (Prism) in Charlotte, North Carolina by Prism’s courier. The soil samples were
analyzed for volatile organic compounds (VOCs) according to EPA Method 8260 and
semi-volatile organic compounds (SVOCs) according to EPA Method 8270.
2.2 Groundwater Sampling Activities
On October 24 and 25, 2014, Quantex, Inc., under Mid-Atlantic’s supervision,
constructed five temporary monitoring wells in soil borings SB-1 through SB-5, as
shown on Drawing 2. Monitoring wells TMW-1 and TMW-2 were installed using DPT.
Air-rotary drilling was utilized to install TMW-3, TMW-4 and TMW-5 after DPT auger
refusal was encountered at shallow depths due to the likely presence of bedrock.
TMW-2 was constructed using 1-inch diameter Schedule 40 PVC casing. TMW-1,
TMW-3, TMW-4 and TMW-5 were constructed using 2-inch diameter Schedule 40 PVC
casing to obtain the sufficient amount of groundwater necessary to perform the
designated laboratory analyses.
The temporary wells were installed such that the well screen intersected the water table
at the time of construction. Following installation, the top of casing elevations for each
well were surveyed relative to an assumed site-specific datum of 100 feet. Groundwater
was encountered at TMW-1, TMW-2 and TMW-4 at an average approximate depth of 8.5
feet below land surface. Groundwater was observed at an approximate depth of 12.5 feet
below land surface at TMW-3 and 33 feet below land surface at TMW-5.
Using the survey elevations and water level measurements obtained from each well
(Table 4), an estimated groundwater elevation contour map was prepared for the site and
is provided as Drawing 3. Note that the water table elevation for TMW-5 was not used to
develop the groundwater elevation contour map as it appeared the water level had not
stabilized. As shown, the estimated groundwater flow direction at the site was determined
to be to the west/southwest, towards Third Fork Creek. The estimated shallow
groundwater flow direction is consistent with the slope of the area topography.
Limited Phase II Environmental Site Assessment Report November 6, 2014
Parcel 2 – Durham Gateway Center Page 3
Durham, North Carolina
Upon completion, each monitoring well was purged with a peristaltic pump and
dedicated tubing until groundwater cleared of sedimentation. The groundwater samples
were collected using a peristaltic pump and new, dedicated polyethylene tubing, packed
into an ice-filled cooler and transported under chain-of-custody from the subject site to
Prism by Prism’s courier. Groundwater samples were analyzed for VOCs according to
EPA Method 6200B and semi-volatile organic compounds (SVOCs), including base
neutrals and acid extractables, according to EPA Method 625. Upon completion of
sampling activities, the wells were abandoned by removing the well casing from the
subsurface and filling their borings with bentonite chips. Holes in the on-site parking areas
created by sampling activities at SB-4/TMW-4 and SB-5/TMW-5 were patched with
concrete.
3.0 SUMMARY OF LABORATORY TEST RESULTS
The laboratory analytical reports and chain-of-custody records for the samples collected at
the site are provided in Appendix B. As summarized in Table 2, no target compounds were
detected, using the specified laboratory test methods, in soil samples collected from the
subject site.
As summarized in Table 3, multiple chemical constituents were detected in groundwater
samples collected from TMW-1, TMW-3, TMW-4 and TMW-5. Constituents detected
included ethanol, methyl-tert-butyl ether (MTBE), acetone, methyl isobutyl ketone and 2-
butanone. Ethanol and MTBE are commonly associated with gasoline. Acetone is
commonly found in a number of applications and is also used as a solvent/paint thinner for
automotive repair/body work. It can also be a laboratory/field artifact. Methyl isobutyl
ketone and 2-butanone are common solvents and are used in a variety of manufacturing
processes and automotive repair. At this point we do not have a clear understanding as to
the likely source of the detected contaminants, however, they could be associated with
historical use of the site for automotive repair and/or could also be associated with off-site
sources. No groundwater samples exhibited concentrations of contaminants that
exceeded their respective NC Groundwater Quality Standards, the Division of Waste
Management Non-Residential Vapor Intrusion Screening Levels or Gross Contamination
Levels for Groundwater.
4.0 CONCLUSIONS AND RECOMMENDATIONS
Fill material from an unknown source(s) was previously used for the redevelopment of
the subject site. Soil samples collected from the subject site did not exhibit chemical
compounds at detectable levels for target analytes. Based on the historical urban use of
the subject site, the potential to encounter environmentally suspect features associated
with an urban infill site (oily soils, discarded heating oil tanks, etc.) during site
Limited Phase II Environmental Site Assessment Report November 6, 2014
Parcel 2 – Durham Gateway Center Page 4
Durham, North Carolina
redevelopment exists. However, available data suggests the potential for such impacts,
if present, to be low.
Based on the results of this investigation, groundwater contaminants are present
beneath the subject site at concentrations below regulatory standards.
The data presented in this report indicates that a release of contaminants has occurred.
The source(s) of the contaminants are unknown at this time but are likely attributed to
historical automotive repair and commercial use of the property and surrounding area.
Mid-Atlantic recommends reporting this release in accordance with North Carolina
Department of Environment and Natural Resources (NCDENR) requirements. It is our
understanding that this site may be entered into the NC Brownfields Program (NCBP). If
so, reporting requirements and additional assessment and corrective action, if needed,
to address the risks associated with known and potential environmental concerns would
be addressed under the NCBP.
DRAWINGS
TABLES
Sample ID Depth Below Land
Surface (ft)TVA Results (ppm) Technician Comment
0.0' - 5.0' -0.05
5.0' - 10.0' 0.77
10.0' - 13.0' 0.27
0.0' - 5.0' -0.07
5.0' - 10.0' 0.03
10.0' - 15.0' 0.02
15.0' - 19.0' -
0.0' - 5.0' 0.20
5.0' - 7.0' -
SB-4 / TMW-4 0.0' - 2.0' 3.16
Air-rotary drilling from 1.0' to 25.0' BLS. 2" PVC
Temporary Well Set at 25.0' BLS, Screened from
10.0' to 25.0' BLS.
SB-5 / TMW-5 0.0' - 1.0' 0.39
Air-rotary drilling from 2.0' to 40.0' BLS. 2" PVC
Temporary Well Set at 40.0' BLS, Screened from
20.0' to 40.0' BLS.
(ppm) - Parts per Million
TVA - Toxic Vapor Analyzer
SB-2 / TMW-2
SB-1 / TMW-1
SB-3 / TMW-3
1" PVC Temporary Well Set at 19.0' BLS,
Screened from 4.0' to 19.0' BLS.
2" PVC Temporary Well Set at 13.0' BLS,
Screened from 3.0' to 13.0' BLS.
Air-rotary drilling from 7.0' to 25.0' BLS. 2" PVC
Temporary Well Set at 25.0' BLS, Screened from
15.0' to 25.0' BLS.
409 SOUTH ROXBORO STREET
DURHAM, NORTH CAROLINA
MID-ATLANTIC JOB NO. 000R2618.01
TABLE 1
PARCEL 2 - DURHAM GATEWAY CENTER
SOIL SAMPLE FIELD SCREENING RESULTS AND MONITORING WELL DETAILS
SB-1 SB-2 SB-3 SB-4 SB-57.5' - 10.0'5.0' - 7.5'5.0' - 7.0'0.0' - 2.0'0.0' - 2.0'10/24/2014 10/24/2014 10/24/2014 10/24/2014 10/24/2014Target Compounds ND ND ND ND ND NA NANATarget Compounds ND ND ND ND ND NA NANAmg/kg - Milligrams per KilogramMSCC - Maximum Soil Contaminant Concentration LevelND - Not Detected. No Target compounds were detected using the specified laboratory test methodNA - Not ApplicableSemi-Volatile Organic Compounds - EPA Method 8270Soil-to-Water MSCC Residential Soil MSCC Industrial / Commercial Soil MSCCCHEMICAL CONSTITUENTCONCENTRATION (mg/kg)Volatile Organic Compounds - EPA Method 8260TABLE 2SOIL SAMPLING TEST RESULTSPARCEL 2 - DURHAM GATEWAY CENTER409 SOUTH ROXBORO STREETDURHAM, NORTH CAROLINAMID-ATLANTIC JOB NO. R2618.01
TMW-1 TMW-2 TMW-3 TMW-4 TMW-510/27/2014 10/27/2014 10/27/2014 10/27/2014 10/27/2014Acetone< 1.5 < 1.5 62 90 260 E 6,000 6,000,000 19,000,000Ethanol250 < 42 < 42 < 42 < 42 4,000 4,000,000 NEMethyl Ethyl Ketone (2-Butanone) < 0.83 < 0.83 < 0.83 < 0.83 4.4 J 4,000 4,000,000 1,880,000Methyl Isobutyl Ketone < 0.048 < 0.048 < 0.048 < 0.048 0.92 J 100 100,000 466,000Methyl-tert-Butyl Ether 1.3 < 0.056 < 0.056 < 0.056 0.74 J 20 20,000 19,700Target Compounds ND ND ND ND ND NA NANAg/L - Micrograms per Liter(1) Groundwater Screening Level (GWSL)(2) Includes Base Neutrals and Acid ExtractablesJ - Detected below the laboratory reporting limit, but above the method detection limitE - Estimated concentration above the calibration range NE - Screening level Not EstablishedND - Not Detected. No Target compounds were detected using the specified laboratory test methodNA - Not ApplicableVolatile Organic Compounds - EPA Method 6200BSemi-Volatile Organic Compounds - EPA Method 625 (2)CONCENTRATION (µg/L)NC Groundwater Quality StandardsCHEMICAL CONSTITUENTGross Contamination Levels for GroundwaterDivision Of Waste Management Non-Residential Vapor Intrusion Screening Levels (GWSL)(1)TABLE 3GROUNDWATER SAMPLING TEST RESULTSPARCEL 2 - DURHAM GATEWAY CENTER409 SOUTH ROXBORO STREETDURHAM, NORTH CAROLINAMID-ATLANTIC JOB NO. R2618.01
TMW-1 TMW-2 TMW-3 TMW-4 TMW-510/25/2014 10/25/2014 10/25/2014 10/25/2014 10/25/2014TOC Elevation 101.66 118.45 98.36 99.83 100.56Depth to Groundwater 8.99 8.51 12.65 8.14 32.92Groundwater Elevation 92.67 109.94 85.71 91.69 67.64Measurements in feetTOC - Top Of CasingTABLE 4TEMPORARY MONITORING WELL AND GROUNDWATER ELEVATIONSPARCEL 2 - DURHAM GATEWAY CENTER409 SOUTH ROXBORO STREETDURHAM, NORTH CAROLINAMID-ATLANTIC JOB NO. R2618.01
APPENDIX A
SOIL BORING LOGS
APPENDIX B
LABORATORY ANALYTICAL REPORTS AND
CHAIN-OF-CUSTODY RECORDS