ATS_Mfg_Env_Addendum_to_Phase_II_Inv

Professional Service Industries, Inc. ● 5021-A West W.T. Harris Boulevard, Charlotte, NC 28269 ● Phone [phone] ● Fax [phone]

October 14, 2014

Ms. Carolyn Minnich
NCDENR - Brownfields Program 217 West Jones Street
Raleigh, NC 27603
Re: Environmental Addendum to Phase II Level II Investigation
Proposed Taco Bell #310581
2125 North Chester Street Lot 2 of Brownfields Project Number # 10063-06-036 Gastonia, North Carolina 28052
PSI Project Number 0457595
Dear Ms. Minnich:
PSI has completed Preliminary Geotechnical Subsurface Drilling and Limited
Environmental Sampling at the proposed Taco Bell Site #310581 located in Gastonia,
North Carolina. The assessment was performed in general accordance with the work plan dated August 28, 2014 approved by you on September 5, 2014 with your revisions. The revisions included: “1) Groundwater/purge water must be containerized until after
analytical results are reviewed. 2) If stained or odorous soils are found during drilling
activities, they cannot be spread on-site next to the boring. They must be containerized
until analytical results are reviewed.”
Project Background

PSI had previously mobilized to the site on August 19, 2014 to supervise a Geophysical
Survey of the property. Several anomalies were identified and interpreted as grade
changes and/or leftover debris from a former building. No USTs, vaults, or other large structures were identified at the subject property.

Assessment Activities

In accordance with the approved Taco Bell workplan, soil samples were collected and analyzed in the field using soil headspace analysis with a photo-ionization detector
(PID) instrument from nine (9) borings performed at the referenced property. Please
refer to the attached “Site Vicinity Map” (Figure 1) for the approximate site location, and
the attached “Boring Location Diagram” (Figure 2) for the approximate location of the
borings. The PID used was calibrated the day preceding the field activities. A background reading for the PID instrument was found to range between 0.0 and 0.1
parts per million (ppm). This background reading was established by observing the PID
Proposed Taco Bell Site #310581 - Gastonia, NC October 14, 2014 PSI Project No.0457595
Page 2
readings in ambient air. This result is recorded; however, it is not subtracted from the PID readings of the soil sample intervals.

PID soil headspace readings ranged from 0.0 to 2.6 ppm. Based on olfactory
observations (sight and smell), no staining or odors indicative of petroleum products or hazardous substances were noted in any of the borings. Please refer to Table 1 for a summary of the PID readings. Based on olfactory observations and the PID readings
being less than 10 ppm, the soil was not containerized.

In accordance with the approved Taco Bell work plan, since PID readings were <25 ppm, one confirmatory soil sample was collected from soil boring B-2 (within the proposed building pad) and submitted for laboratory analysis. Soil sample B-2, SS-2
was collected at a depth of 3.5 to 5 feet below ground surface (bgs) and analyzed for
Volatile Organic Compounds (VOCs) by EPA Method 8260 and Semi-Volatile Organic
Compounds (SVOCs) by EPA Method 8270.
Groundwater was encountered at approximately 19-feet bgs during the field drilling.
One confirmatory groundwater sample was collected directly through the hollow-stem
augers from soil boring B-2 and submitted for laboratory analysis. Therefore, there was
no purge water generated while collected the groundwater sample. Water sample B-2,
WS-1 was collected and analyzed for VOCs by EPA Method 8260 and SVOCs by EPA Method 8270.

Laboratory Results

Laboratory analytical results of soil sample B-2, SS-2 indicated that levels of VOCs and SVOCs were below laboratory detection limits. Please refer to Table 2 for a summary of
the laboratory analytical results for soil.

Laboratory analytical results of water sample B-2, WS-1 indicated that levels of
chloroform, 1,1-dichloroethene, and 1,1,2-trichlorotrifluoroethane were above laboratory detection limits, but below the 15A North Carolina Administrative Code (NCAC) 02L
.0202 Groundwater Quality Standards. All reported SVOC constituents were below
laboratory detection limits. Please refer to Table 3 for a summary of the laboratory
analytical results for groundwater.
Proposed Taco Bell Site #310581 - Gastonia, NC October 14, 2014 PSI Project No.0457595
Page 3
If you have any questions, please feel free to contact me.

Respectfully submitted,
Professional Service Industries, Inc.

Mark R. McCagg Bryan M. Lucas
Project Scientist Principal Consultant Enclosures
cc: Mr. Bruce Nicholson – NCDENR Brownfields Program (via email only, w/encls)
Mr. David Bohanon – Yum Brands (via email only, w/encls) Ms. Julie Reese – Yum Brands (via email only, w/encls)
Mr. Billy N. Mitchell – PSI, Inc. – (via email only, w/encls)
Attachments:
Figure 1 - Site Vicinity Map
Figure 2 - Boring Location Diagram Table 1 – PID Readings
Table 2 – Soil Analytical Results
Table 3 – Groundwater Analytical Results Laboratory Results with Chains of Custody and Chromatograms

ATTACHMENTS
Proposed Taco Bell #310581
2125 North Chester Street
Gastonia, North Carolina 28052
PSI Project No.
0457595
N
Approximate Scale:
Site Vicinity Map
Figure
1Not to Scale
Source: Google Earth
Approximate Site Location

Base drawing, “Site Sketch”, prepared by Mark D McCluggage AIA, CCS and dated September 9, 2014.

North
Project Name: FIGURE 2
BORING LOCATION DIAGRAM Proposed Taco Bell #310581 2125 North Chester Street
Gastonia, North Carolina 28052

Project No.: Date:
0457595 October 2014

B-5
B-2
B-6
B-4
B-3
Approximate Soil Test Boring Location Not to Scale
B-1
B-5
B-1 (47”)
B-7 B-8
B-9
TABLE 1:PID READINGS
PROJECT NAME:Proposed Taco Bell #310581
SITE ADDRESS:2125 North Chester Street, Gastonia, North Carolina
PSI PROJECT NO:0457595
Date:9/19/2014
SAMPLE
LOCATION
SAMPLE
DEPTH
(FT BGS)
OVA-PID
RESPONSE
(PPM)
EVIDENT ODOR OR
STAINING LAB SAMPLE SAMPLE DATE
B-1, SS1 1 - 2.5 0.1 None NA NA
B-1, SS2 3.5 - 5 0.0 None NA NA
B-1, SS3 6 - 7.5 0.2 None NA NA
B-1, SS4 8.5 - 10 0.1 None NA NA
B-1, SS5 13.5 - 15 0.1 None NA NA
B-1, SS6 18.5 - 20 WET None NA NA
B-2, SS1 1 - 2.5 0.0 None NA NA
B-2, SS2 3.5 - 5 0.0 None YES 9/19/2014
B-2, SS3 6 - 7.5 0.0 None NA NA
B-2, SS4 8.5 - 10 0.1 None NA NA
B-2, SS5 13.5 - 15 0.2 None NA NA
B-2, SS6 18.5 - 20 0.1 None NA NA
B-3, SS1 1 - 2.5 2.6 None NA NA
B-3, SS2 3.5 - 5 0.2 None NA NA
B-3, SS3 6 - 7.5 0.1 None NA NA
B-3, SS4 8.5 - 10 0.0 None NA NA
B-3, SS5 13.5 - 15 0.3 None NA NA
B-3, SS6 18.5 - 20 0.4 None NA NA
B-4, SS1 1 - 2.5 0.1 None NA NA
B-4, SS2 3.5 - 5 0.2 None NA NA
B-4, SS3 6 - 7.5 0.2 None NA NA
B-4, SS4 8.5 - 10 0.0 None NA NA
B-5, SS1 1 - 2.5 0.1 None NA NA
B-5, SS2 3.5 - 5 0.2 None NA NA
B-5, SS3 6 - 7.5 0.2 None NA NA
B-5, SS4 8.5 - 10 0.0 None NA NA
B-6, SS1 1 - 2.5 0.1 None NA NA
B-6, SS2 3.5 - 5 0.3 None NA NA
B-6, SS3 6 - 7.5 0.1 None NA NA
B-6, SS4 8.5 - 10 0.2 None NA NA
B-7, SS1 1 - 2.5 0.1 None NA NA
B-7, SS2 3.5 - 5 0.0 None NA NA
B-7, SS3 6 - 7.5 0.2 None NA NA
B-7, SS4 8.5 - 10 0.1 None NA NA
B-8, SS1 1 - 2.5 0.1 None NA NA
B-8, SS2 3.5 - 5 0.2 None NA NA
B-8, SS3 6 - 7.5 0.2 None NA NA
B-8, SS4 8.5 - 10 0.1 None NA NA
B-9, SS1 1 - 2.5 0.0 None NA NA
B-9, SS2 3.5 - 5 0.1 None NA NA
B-9, SS3 6 - 7.5 0.0 None NA NA
B-9, SS4 8.5 - 10 0.2 None NA NA
Notes: 1)PID = Photo-Ionization Detector
2)FT BGS = Feet below ground surface
3)PPM = Parts per million
4)NA = Not Applicable
PROJECT NAME:Proposed Taco Bell #310581
SITE ADDRESS:2125 North Chester Street, Gastonia, North Carolina
PSI PROJECT NO:457595
VOC
8260B
SVOC
8270D
Sample ID Date Collected
(mm/dd/yy)Location Sample Depth
(ft. BGS)
B-2, SS-2 9/19/2014 Proposed Building Footprint 3.5' to 5'BDL BDL
N/A N/A
N/A N/A
N/A N/A
1) ft. BGS = feet below ground surface
3) NCDENR = North Carolina Department of Environment and Natural Resources
4)IHSB = Inactive Hazardous Sites Branch
5) PSRG = Preliminary Soil Remediation Goals
Contaminant of Concern
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Table 2: Soil Analytical Results
Analytical Method
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NCDENR-IHSB Section Preliminary Residential PSRG (September 2014)
NCDENR-IHSB Section Protection of Groundwater PSRG (September 2014)
Notes:
2) BDL = Below Detection Limit
NCDENR-IHSB Section Preliminary Industrial PSRG (September 2014)
6) N/A = Not Applicable due to results below laboratory detection limits
PROJECT NAME:Proposed Taco Bell #310581
SITE ADDRESS:2125 North Chester Street, Gastonia, North Carolina
PSI PROJECT NO:457595
VOC
8260B
VOC
8260B
VOC
8260B
Sample ID Date Collected
(mm/dd/yy)Location Sample Depth
(ft. BGS)
B-2, WS-1 9/19/2014 Proposed Building Footprint 20'14 6.4 2.1
70 350 200,000
1) ft. BGS = feet below ground surface
3) NCAC = North Carolina Administrative Code
15A NCAC 02L .0202 Groundwater Standards (Effective April 1, 2013)
Notes:
2) Results reported in ug/L = micrograms per Liter
Table 3: Groundwater Analytical Results
Analytical Method
Contaminant of Concern
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Attachment AList of Analytes with QC Qualifiers
Sample Work Sample Run
Number Group Type Analyte ID Qualifier
________________ ___________ _______ ________________________________________ __________ __________
L723042-01 WG744648 SAMP Bis(2-chloroethyl)ether R2993588 J
WG744648 SAMP 4-Nitrophenol R2993588 J4
L723042-02 WG744271 SAMP Chloroethane R2993120 J4
WG744839 SAMP Benzidine R2993589 J3
WG744839 SAMP Bis(2-chloroethyl)ether R2993589 J
WG744839 SAMP 4,6-Dinitro-2-methylphenol R2993589 J3
WG744839 SAMP 2,4-Dinitrophenol R2993589 J3
WG744839 SAMP 4-Nitrophenol R2993589 J3
WG744839 SAMP Pentachlorophenol R2993589 J3
Page 10 of 33
Attachment BExplanation of QC Qualifier Codes
Qualifier Meaning
__________________ _______________________________________________________________________________
J (EPA) - Estimated value below the lowest calibration point. Confidence
correlates with concentration.
J3 The associated batch QC was outside the established quality control range
for precision.
J4 The associated batch QC was outside the established quality control range
for accuracy.
Qualifier Report Information
ESC utilizes sample and result qualifiers as set forth by the EPA Contract Laboratory Program and
as required by most certifying bodies including NELAC. In addition to the EPA qualifiers adopted
by ESC, we have implemented ESC qualifiers to provide more information pertaining to our analytical
results. Each qualifier is designated in the qualifier explanation as either EPA or ESC.
Data qualifiers are intended to provide the ESC client with more detailed information concerning
the potential bias of reported data. Because of the wide range of constituents and variety of
matrices incorporated by most EPA methods,it is common for some compounds to fall outside of
established ranges. These exceptions are evaluated and all reported data is valid and useable
"unless qualified as 'R' (Rejected)."
Definitions
Accuracy - The relationship of the observed value of a known sample to the
true value of a known sample. Represented by percent recovery and
relevant to samples such as: control samples, matrix spike recoveries,
surrogate recoveries, etc.
Precision - The agreement between a set of samples or between duplicate samples.
Relates to how close together the results are and is represented byRelative Percent Differrence.
Surrogate - Organic compounds that are similar in chemical composition, extraction,
and chromotography to analytes of interest. The surrogates are used to
determine the probable response of the group of analytes that are chem-
ically related to the surrogate compound. Surrogates are added to the
sample and carried through all stages of preparation and analyses.
TIC - Tentatively Identified Compound: Compounds detected in samples that are
not target compounds, internal standards, system monitoring compounds,
or surrogates.
Page 11 of 33
Summary of Remarks For Samples Printed
09/30/14 at 12:14:52
TSR Signing Reports: 350
R5 - Desired TAT
Use ASG and SEG on all waters and soils; Report all waters in ug/L; Paperless client, charge
for trip blanks.
Sample: L723042-01 Account: PSICNC Received: 09/20/14 09:00 Due Date: 09/26/14 00:00 RPT Date: 09/30/14 12:14
Sample: L723042-02 Account: PSICNC Received: 09/20/14 09:00 Due Date: 09/26/14 00:00 RPT Date: 09/30/14 12:14