23056 Affordable Custom Iron Work Plan 20200120

BROWNFIELDS ASSESSMENT WORK PLAN
REVISION 1.0

AFFORDABLE CUSTOM IRON
3804 SOUTH BOULEVARD
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT ID. 23056-19-060
ECS PROJECT NO. 49-10479

PREPARED FOR

CC LOSO STATION, LLC
227 WEST TRADE STREET, SUITE 1000
CHARLOTTE, NORTH CAROLINA 28202

JANUARY 20, 2020
Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
0

TABLE OF CONTENTS

1.0 INTRODUCTION ........................................................................................................... 1
2.0 SCOPE OF WORK .......................................................................................................... 4
3.0 SAMPLING METHODOLOGY ......................................................................................... 5
4.0 LABORATORY ANALYSES .............................................................................................. 9
5.0 QUALITY ASURANCE/QUALITY CONTROL ..................................................................... 9
6.0 INVESTIGATION DERIVED WASTE ............................................................................... 10
7.0 REPORTING................................................................................................................ 11

TABLE

Table 1 Proposed Sample Locations and Analyses

FIGURES

Figure 1 Site Topographic Map
Figure 2 Site Location Map
Figure 3 Proposed Sample Location Map

APPENDICES

Appendix A Survey Plat showing Location of Brownfields Property
Appendix B Request for Additional Assessment – December 19, 2019
Appendix C Target Analyte List from Pace Analytical Services, LLC - EPA Methods 8260 and 8270
Appendix D Target Analyte List from Pace Analytical Services, LLC - EPA Method TO-15

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
1
1.0 INTRODUCTION

The Brownfields Property lies within Mecklenburg County Parcel ID No 14901239 and is identified as
Parcel 2A in the survey plat included as Appendix A. The Brownfields Property is approximately 3.872
acres in size. Mecklenburg County Parcel ID No 14901239 is approximately 8.6 acres in size. Figure 1 is a
site topographic map. Figure 2 is a site location map.

The Brownfields property was historically the site of residences, commercial/warehouse buildings, a drive-
in theater, and a commercial shopping center until some time before 2006. At one time the property was
used by a company called Affordable Custom Iron, with historical operations that appeared to include a
spray paint booth and an incinerator. After 2006 the main shopping center/commercial buildings were
no longer present. In 2009, a parking lot was developed, and no buildings remained on the property by
2012.

Redevelopment activities are currently occurring at the Brownfields property. An asphalt parking lot has
been removed and grading activities are occurring at the time this work plan was prepared. Mecklenburg
County Parcel ID No 14901239 was owned by Scaleybark Partners, LLC prior to December 20, 2019 when
ownership was transferred to CC LoSo Station, LLC.

ECS previously performed a Phase I Environmental Site Assessment (Phase I ESA) for this site in May 2019
(ECS Project No. 49-9324). The finding of the Phase I ESA are summarized I a report dated May 22, 2019.
In the Phase I ESA Report, ECS identified the following recognized environmental condition (REC)
described below:

City of Charlotte- Scaleybark Site, 3610 South Boulevard and Clanton Road - Located at the subject
property. ECS reviewed information from the online North Carolina Department of Environmental Quality
(NCDEQ) Laserfiche database for this incident (Facility ID NONCD0002805). According to a Site Closure
Request Report completed by S&ME and dated September 6, 2007, there were spill locations identified
at abandoned facilities. The report indicated that there was a motor oil spillage from parked vehicles and
pails of waste oil, as well as suspected spillage and over-spray from an ornamental iron spray paint booth.
According to the report, this incident occurred in two locations which are described as Detail A and Detail
B below. ECS notes these areas have been redeveloped since 2007. The report noted that prior to
redevelopment, the City undertook a voluntary cleanup of known areas of soil contamination. The
remediation consisted of the removal and off-site disposal of contaminated soils from areas of the
property identified during a Phase II ESA. Several excavations were performed at Detail A and B (further
discussed below).

Detail A Location: This location consists of a larger tract of land that included a portion of the
subject property, as well as the north adjoining property. The building, which was formerly located
on the north adjoining property, was formerly occupied by Consolidated Steel Building (101
Clanton Road), a structural steel fabricator and constructor. The report noted that the source of
the soil contamination was spills/leaks of motor oil from parked vehicles and small storage
containers. This location had impacts of Oil and Grease (O&G) and Total Petroleum Hydrocarbons-
Diesel Range Organics (TPH-DRO) above the North Carolina Department of Environmental Quality
(NCDEQ) Action Levels of 250 milligrams per kilogram (mg/Kg) for O&G and 40 mg/Kg for TPH-
Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
2
DRO, respectively. Soil excavations occurred in June and July of 2007. The impacted soils were
transported to an off-site treatment facility. Approximately 325 tons of impacted soils were
removed. Post-remediation samples collected at the bottom of the excavations indicated that the
contaminant levels of soil remaining in place did not exceed the NCDEQ action level for O&G or
TPH-DRO. S&ME recommended that no further soil remediation appeared to be necessary at the
Consolidated Steel site.

On September 24, 2007, the NCDEQ issued a No Further Action (NFA) letter indicating they had
reviewed the September 2007 Site Closure Report and that the soil contamination does not equal
or exceed the TPH action level for semi-volatile organics or O&G for this incident (Incident 91007).

Detail B Location: This location was formerly located at the subject property and was identified as
3610 South Boulevard. The former onsite building was occupied with Affordable Custom Iron,
which was an ornamental iron fabricator. Two locations at this former facility were found to have
contaminants exceeding remediation goals. The report noted that the cleanup criteria used were
the lesser of the NCDEQ Inactive Hazardous Sites Branch (IHSB) Health-Based Remediation Goals
(RG) or the NCDEQ Soil-to-Groundwater Maximum Soil Contaminant Concentrations (MSCCs).
The contaminants included benzene, carbon tetrachloride, and arsenic at location TP-1 and
benzo(a)pyrene and dibenzo(a,h)anthracene at location SS-3.

Soil excavations reportedly occurred in June and July of 2007. The impacted soils were
transported to an off-site treatment facility. Approximately 76 tons of impacted soils were
removed. Post-remediation samples collected at the bottom of the excavations indicated that
the organic contaminant concentrations of the soil remaining in place did not exceed their
respective NCDEQ IHSB Health-Based RG or the MSCCs. In addition, the report noted that arsenic
concentrations did not exceed the NCDEQ IHSB Health-Based RG and the toxicity characteristic
leachate procedure leachable arsenic level (TCLP Arsenic) did not exceed the NCDEQ IHSB soil
limits considered protective of groundwater. S&ME recommended that no further soil
remediation appeared to be necessary at the Affordable Custom Iron site.

On September 24, 2007, the NCDEQ indicated in an NFA letter that they had reviewed the
September 2007 Site Closure Report and that the soil contamination does not exceed the soil-to-
groundwater MSCCs. The NCDEQ noted that the NFA only applies to this incident (Incident 91008)
and the non-petroleum contamination found in form of carbon tetrachloride and arsenic was
being referred to the Inactive Hazardous Site Branch (IHSB).

Ms. Erika Frey, REM contacted Mr. David Ramey with the NCDEQ-Division of Waste Management on May
15, 2019. According to Mr. Ramey, he was not aware of more recent reports than the records dated 2007.
He indicated that he spoke with Mr. David Wolfe with the City of Charlotte Engineering and Property
Management in 2012/2013 and indicated that Mr. Wolfe said that the City of Charlotte did not intend to
perform additional assessment for Charlotte-Scaleybark Site (NONCD0002805). Mr. Ramey recommended
contacting the NCDEQ Underground storage tank (UST) Section for UST records associated with this site.
Ms. Frey contacted Mr. Dan Bowser with the NCDEQ on May 16, 2019 for information pertaining to USTs.
Mr. Bowser indicated that Incidents 91007 and 91008 occurred at the property. ECS considers the leaking
above-ground storage tank (LAST) incidents (incident numbers 91007 and 91008) to be historical
Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
3
recognized environmental conditions (HRECs) of the subject property. Although the LAST Incidents
(incident numbers 91007 and 91008) have received NFA status, the NFA associated with Incident 91008
(Affordable Custom Iron) noted that the non-petroleum contamination (carbon tetrachloride and arsenic)
was being referred to the IHSB. Based on interviews and record review, ECS did not identify regulatory
closure documents for the non-petroleum contamination. Based on this information, ECS considers the
SHWS listing to be a REC of the subject property.

Draper Aden Associates performed passive soil gas monitoring at the Brownfields Property in August and
September 2019 which is summarized in a report titled Soil Gas Assessment Report dated October 10,
2019. During this assessment, Draper Aden Associates emplaced passive soil gas samples at 37 locations
across the Brownfields Property on August 21 and 22, 2019 and retrieved these samples on September 6,
2019. The samples were analyzed for VOCs. One exceedance above IHSB vapor intrusion screening levels
(VISLs) for residential exposure scenarios was noted. The exceedance was for naphthalene which was
detected in a sample near the location of the former Affordable Custom Iron facility. Draper Aden
Associates input a maximum detection concentration scenario of the VOCs into NCDEQ risk calculator and
noted that the calculated risk did not exceed acceptable risk levels.

The purpose of this work plan is to address data gaps in the previous assessment activities and create a
baseline for the Brownfields redevelopment by conducting additional sampling activities. The proposed
work is intended to address the Request for Additional Assessment (RAA) which was submitted by the
North Carolina Brownfields Program (NCBP) on December 19, 2019 by email. The RAA is included as
Appendix B. After the RAA was issued, ECS and the NCBP had discussions regarding the necessity of the
number of soil gas sampling points indicated in the RAA. On January 8, 2020, the NCBP indicated by
telephone that the number of soil gas sampling points could be reduced from seven to four and that the
three sampling points not near the proposed courtyard shown on a figure included with the RAA need not
be sampled. This work plan is intended for use by the NCBP and no other agencies. ECS intends to
implement the assessment activities which are included in this work plan to address the following points
in the RAA:

• The construction and sampling of 3 shallow monitoring wells in the areas indicated in the figure
submitted by NCBP with the RAA. A copy of this figure is included with correspondence in
Appendix B.
• The advancement and sampling of 8 shallow soil borings in the areas indicated in the figure
submitted by NCBP with the RAA. Samples are to be collected over the interval of 3 to 5 feet
below ground surface (bgs).
• The advancement and sampling of 2 deeper soil borings in the area proximal to former soil
excavation TP-1 as indicated in a figure submitted by NCBP with the RAA. Samples are to be
collected from grade to 10 feet and are to be screened with a calibrated photoionization detector
(PID). The interval with the highest PID reading is to be submitted for laboratory analyses.
• The construction and sampling of 4 soil gas points in the areas near the courtyard as indicated in
the figure submitted by NCBP with the RAA.
• Preparation of a Brownfields Assessment Report which includes the items outlined in the RAA
letter.

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
4
The contact information for the property owner, environmental consultant, and the North Carolina
Brownfields Program (NCBP) is as follows:

Owner and Developer’s Representative:
Mr. Michael Tubridy
CC LoSo Station, LLC
227 West Trade Street, Suite 1000
Charlotte, NC 28202
Phone: [phone]
[e-mail]

Site Environmental Representative:
Mr. Joseph P. Nestor, P.G., P.E
ECS Southeast, LLP
1812 Center Park Drive, Suite D
Charlotte, North Carolina 28217
Phone: [phone]
[e-mail]

NCDEQ Brownfields Program (NCBP) Contact:
Mr. Bill Schmithorst, Brownfields Project Manager
Phone: [phone]
[e-mail]

2.0 SCOPE OF WORK

Prior to the initiation of the drilling and sampling activities, ECS will contact North Carolina 811 and a qualified
private utility locate to minimize the potential for utility conflicts with the proposed drilling locations. Mr. Bill
Schmithorst, the NCBP Project Manager, will be provided a minimum of a 48-hour notice prior to
initiation of field assessment activities.

GROUNDWATER SAMPLING
In general accordance with RAA, ECS proposes to construct and sample three permanent monitoring wells
at the Brownfields Property. The proposed locations of these monitoring wells are shown in Figure 3. ECS
anticipates that the water table will be encountered in saprolite at depths of less than 30 feet bgs and
each well will be completed to a depth of 25 to 35 feet bgs based upon its knowledge of the Brownfields
Property and surrounding area. Following completion of well construction, the relative horizontal position
and elevation of the top of casing for each monitoring well will be determined by a licensed North Carolina
Surveyor.

Groundwater samples will be collected by low flow sampling techniques. Samples will be analyzed for
volatile organic compounds (VOCs), semi-volatile organic compound (SVOCs), and metals regulated by the
Resource Conservation and Recovery Act (RCRA metals). Additional details are summarized in Table 1.

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
5

SOIL SAMPLING
In general accordance with RAA, ECS proposes to collect ten soil samples at the Brownfields Property.
Eight of the samples will be collected from a depth of 3 to 5 feet bgs. Two of the samples will be collected
over a 2-foot interval between grade and 10 feet bgs and will be selected on the basis of field observations
which indicate or suggest the greatest potential for impact, i.e. observed PID field screening
concentrations or visual staining. The locations of the proposed soil sample locations are shown in Figure
3.

Soil samples will be collected by direct push technology (DPT). Samples will be analyzed for VOCs, SVOCs,
RCRA metals, and hexavalent chromium. Additional details are summarized in Table 1.

The soil boring locations will be marked with flagging or stakes. The relative horizontal position and
surface elevation of each soil sample location will be determined by a licensed North Carolina Surveyor
following completion of sampling.

SOIL GAS SAMPLING
In general accordance with RAA, ECS proposes to collect 4 soil gas samples at the Brownfields Property.
As indicated previously, following discussion with the NCBP, it was agreed that soil gas monitoring points
not near the proposed courtyard would not be required as originally requested. Samples will be collected
from soil gas points installed on borings excavated to a depth of 7 feet below ground surface (bgs) with a
6-inch gas probe set at the bottom of each boring. The locations of the proposed soil gas sample locations
are shown in Figure 3. Following completion of construction of the soil gas points, the relative horizontal
position and surface elevation of each soil gas sample location will be determined by a licensed North
Carolina Surveyor.

Soil gas samples will be analyzed for VOCs. Additional details are summarized in Table 1.

3.0 SAMPLING METHODOLOGY

The soil and soil gas sampling will be conducted in general accordance with the NCDEQ-Division of Waste
Management (DWM) IHSB Program’s Guidelines for Assessment and Cleanup (Revised October 2015).

GROUNDWATER SAMPLING
In general accordance with RAA, ECS proposes to construct and sample three permanent monitoring wells
at the subject property. The locations of these proposed monitoring wells are shown in Figure 3.

ECS proposes to advance borings for the proposed monitoring wells using hollow-stem augers. Schedule
40, 2-inch diameter, PVC casing and screen will be placed through the augers at each well. The augers will
be decontaminated using a pressure washer and municipal water prior to use at each drilling location.
ECS anticipates using 10 to 15 feet of 0.10-inch slot screen for each well. The well screen for each well
will be set to intersect the apparent water table at the time of drilling. ECS anticipates that the water
table will be encountered at depths of less than 30 feet bgs and auger refusal will be greater than 40 feet
bgs. As augers are extracted, filter sand will be emplaced through the augers, and around the well screen
and approximately 1 foot above the well screen at each well. A bentonite seal (approximately 1-2 feet
Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
6
thick) will be emplaced above the sand and hydrated. After allowing bentonite to hydrate, the remaining
annular space at each well will be filled with grout consisting of 95 percent minimum Portland cement.
Each monitoring well will be completed within an 8-inch diameter bolt-down manhole set flush to grade
within a 2-foot by 2-foot concrete pad. The monitoring wells will be developed by pumping for up to 90
minutes each for the removal of fines and particulate matter. A minimum of five well volumes will be
removed from each well during development or until the water produced appears relatively free of
sediment and particulate matter or it runs dry.

The relative elevations and horizontal position of the top of each well casing will be determined by a North
Carolina licensed surveyor. The survey data will be presented in tabular form. ECS will subsequently
calculate the groundwater elevation by subtracting the measured depths to water at each well from their
respective surveyed tops of casing. ECS will use the calculated groundwater elevation data to infer the
groundwater flow direction across the subject property.

After allowing the monitoring wells to stabilize at least 24 hours after construction, ECS will measure water
level in each well and collect groundwater samples. Water level measurements will be collected using an
electronic water level indicator accurate to 0.01 feet. The monitoring wells will be sampled using low-
flow sampling techniques in general conformance with USEPA guidelines (Revised September 19, 2017)
and water quality measurements will be collected/recorded. ECS will maintain drawdown in each well to
less than 0.3 feet during sampling. Water quality measurements will be made using a flow-through cell
at intervals approximately 3 to 5 minutes apart. Parameters to be measured include turbidity,
temperature, specific conductance, pH, oxidation-reduction potential, and dissolved oxygen.
Groundwater samples will be collected when each well has stabilized. Stabilization will be considered
achieved when three consecutive readings are within the limits shown below:

• Turbidity (10% for values greater than 5 nephelometric turbidity units (NTUs); if three turbidity
values are less than 5 NTU, consider the values as stabilized).
• Dissolved Oxygen (10% for values greater than 0.5 mg/L, if three dissolved
oxygen values are less than 0.5 mg/L, consider the values as stabilized).
• Specific Conductance (5%).
• Temperature (3%).
• pH (± 0.2 standard pH unit).
• Oxidation/Reduction Potential (±10 millivolts)

Groundwater samples from these wells will be analyzed for VOCs, SVOCs and total RCRA metals, and
dissolved RCRA metals. Comparison of the concentrations of total versus dissolved RCRA metals will
provide information as to whether the concentrations of total RCRA metals may be biased high as the
result of sediment or particulate matter in samples. Table 1 indicates the proposed groundwater sample
location designation, analysis and sample type.

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
7
One duplicate groundwater sample and one equipment blank sample will be collected and submitted for
laboratory analysis of VOCs, SVOCs, and total and dissolved RCRA metals. One trip blank sample will
accompany soil sample containers from laboratory, to the field, and back to the laboratory and will be
analyzed for VOCS. The attached Table 1 indicates the proposed soil sample location designation, analysis
and sample type.

SOIL SAMPLING
A total of ten soil samples will be collected by advancing soil borings using a direct push technology (DPT)
track mounted drill rig.

Eight soil borings will be advanced to a total depth of 5 feet bgs at the locations shown in Figure 3. Prior
to advancing each boring, the down-hole equipment will be decontaminated utilizing a pressure washer
and municipal water locations. The soil borings will be advanced using DPT by hydraulically driving a five-
foot long, 1.5-inch diameter soil sampling probe into the soil to a depth of 5 feet bgs. Soils will be collected
from each of the soil boring locations using a soil sampling probe lined with a dedicated disposable clear
liner. A 5-foot long soil sampling probe will be driven in 5-foot increments and the clear liner will fill with
soil. The probe will be extracted after driving the probe to 5 feet bgs and the liner will be removed from
the probe and cut open to expose the soil. ECS will visually classify the soil collected from each boring and
will screen the soil for relative levels of volatile organic vapors using a PID. ECS will select a representative
sample from each of these borings over the interval 3 to 5 feet bgs for chemical analyses.

Two soil borings will be advance to a total depth of 10 feet bgs at the locations shown in Figure 3. Prior
to advancing each boring, the down-hole equipment will be decontaminated utilizing a pressure washer
and municipal water. The soil borings will be advanced using DPT by hydraulically driving five-foot long,
1.5-inch diameter soil sampling probes into the soil in two 5-foot increments. Soils will be collected from
each of the soil boring locations using a soil sampling probe lined with a dedicated disposable clear liner.
Each soil sampling probe will be outfitted with a clear liner which will fill with soil as it is driven into the
subsurface. The probes will be extracted and the liners will be removed from the probes and cut open to
expose the soil. ECS will visually classify the soil collected from each boring and will screen the soil for
relative levels of volatile organic vapors using PID. ECS will select a sample from each of these borings
over the interval that exhibits the greatest potential for impacts based PID readings. If elevated PID
readings are not noted, ECS will then use visual and/or olfactory observations to determine the interval
with the greatest potential for impacts. If PID reading and visual and/or olfactory observations do not
indicate impacts, ECS will collect a sample from 8 to 10 feet bgs.

Soil samples will be analyzed for VOCs, SVOCs, RCRA metals, and hexavalent chromium. One duplicate
sample will be collected and analyzed for VOCs, SVOCs, RCRA metals, and hexavalent chromium by. One
trip blank sample will accompany soil sample containers from laboratory, to the field, and back to the
laboratory and will be analyzed for VOCS. Table 1 indicates the proposed soil sample location designation,
analysis and sample type.

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
8
SOIL GAS SAMPLING
In general accordance with the RAA, ECS proposes to collect four soil gas samples at the locations shown
in Figure 3.

ECS proposes to collect samples from permanent soil gas sample points. Each soil gas sample point will
be constructed by excavating a 1.5- to 3-inch diameter boring using a DPT drill rig or hand auger to a depth
of 7 feet bgs. A stainless-steel vapor implant will be placed in the bottom of each boring. Nylaflow or
Teflon® tubing will be connected to vapor implant and routed above grade at each sample point. Clean
quartz filter sand will be placed around and approximately 6 inches above the vapor implant at each
sample point. A 1-foot (minimum) bentonite seal will be placed above the filter sand and hydrated and
the remaining annular space will be grouted to near-grade at each sample point. A bolt-down manhole
will be provided at each sample point and will be set within a 1.5-foot by 1.5 foot concrete pad.

After allowing at least 30 minutes for the bentonite seal to hydrate, the seal will be leak tested using
helium gas, a gas shroud, and a helium detector as recommended in NCDEQ-DWM Vapor Intrusion
Guidance (Alexander, March 2018). Helium will be released into the shroud and the helium concentration
inside the shroud will be monitored. When the helium concentration is approximately 30 percent, a soil
gas sample will be collected and measured with a helium detector. If the concentration of measured
helium concentration is less than 10 percent of the helium concentration inside the shroud, the seal on
the soil gas probe will be considered to be tight and not leaking. If the test results are not acceptable, ECS
will take steps to achieve a better seal and repeat the test until the results are acceptable.

After leak testing the sample train will be purged of approximately 3 tubing volumes at a rate of 200
milliliters per minute or less using a syringe or other appropriate device. The tubing will then be connected
to a pre-evacuated and pre-cleaned Summa canister for sampling. ECS will utilize either 1- or 6 liter
Summa canisters which will be batch certified by laboratory. ECS will check and note the vacuum on each
Summa Canister before initiating the sampling procedure. ECS will terminate the sampling procedure at
each sampling point while vacuum is still present in the canister. ESC anticipates terminating sampling
when vacuum decreases below 8 inches of mercury (in-Hg) and before it decreases below 5 in-Hg. ECS
will note the vacuum for each canister at the end of the sampling procedure.

ECS will collect a duplicate soil gas sample at one of the soil gas sampling points. The duplicate sample
will be collected through a sampling tee. The sample will be submitted to the laboratory without
indicating from which sample point it was collected.

The soil gas samples and one duplicate soil gas sample will be analyzed for VOCs. Table 1 indicates the
proposed soil sample location designation, analysis and sample type.
Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
9
Deviation from Approved Plan
This work plan is intended to be dynamic and to be adapted to specific and actual site conditions.
Accordingly, should such conditions warrant a change either by addition, deletion or modification of a
procedure, such may be accomplished with agreement between CC LoSo Station, LLC’s representative and
ECS after consultation with, and subject to approval by the NCBP. Such changes will comply with
applicable local, State, and Federal rules and regulations. A written amendment shall be prepared and
submitted to NCBP for approval (the use of e-mail correspondence shall suffice for approval, followed by
a hard copy or electronic copy provided on Disk or similar media) prior to implementation. Amendments
must have the approval of the NCBP prior to implementation of each amendment.

4.0 LABORATORY ANALYSES
ECS anticipates utilizing Pace Analytical Services, LLC (Pace) for laboratory services. Pace is certified by
North Carolina to perform wastewater and groundwater analyses and drinking water analyses. Pace holds
certificate No. 12 from NCDEQ-DWM for wastewater and groundwater analyses. North Carolina does not
certify laboratories for soil gas/air analyses. ECS will request that soil gas samples by analyzed following
standards established under the National Environmental Laboratory Accreditation Conference
(NELAC) Program which is administered by The NELAC Institute (TNI). ECS understands Pace is a member
of the TNI.

Groundwater samples will be analyzed for VOCs, SVOCs and total RCRA metals, and dissolved RCRA
metals. VOCs will be analyzed using EPA Method 8260. SVOCs will be analyzed using EPA Method 8270.
Total RCRA metals and dissolved RCRA will be analyzed using EPA Method 6020/7470. Table 1 indicates
the proposed groundwater sample location designation, analysis and sample type.

Soil samples will be analyzed for VOCs by EPA Method 8260, SVOCs by EPA Method 8270, RCRA metals by
EPA Method 6020/7471, and hexavalent chromium by EPA Method 7199. Table 1 indicates the proposed
soil sample location designation, analysis and sample type.

Soil gas samples will be analyzed for VOCs by EPA Method TO-15. Table 1 indicates the proposed soil
sample location designation, analysis and sample type.

5.0 QUALITY ASSURANCE/QUALITY CONTROL

Soil and soil gas samples will be maintained under a chain-of-custody protocol and a Level II QA/QC
package will be requested of the North Carolina certified laboratory. ECS anticipates utilizing Pace for
laboratory services. Pace is certified by North Carolina to perform wastewater and groundwater analyses
and drinking water analyses. Pace holds certificate No. 12 from NCDEQ-DWM for wastewater and
groundwater analyses. North Carolina does not certify laboratories for soil gas/air analyses. ECS will
request that soil gas samples by analyzed following standards established under the NELAC Program which
is administered by The NELAC Institute (TNI). ECS understands Pace is a member of the TNI.

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
10
ECS will request that laboratory reports include a summary of detections. ECS will request that the
method detection limits (MDL) and J-flags (estimated concentrations between the method detection
limits and the laboratory reporting limit) be included in laboratory reports.

ECS will analyze groundwater samples for dissolved RCRA metals in addition to total RCRA metals. Total
RCRA metals and dissolved RCRA metals will be analyzed by EPA Method 6020/7470. Samples to be
analyzed for dissolved RCRA metals will be filtered in the field using new disposable 0.45 micron filters.
Comparison of the concentrations of total versus dissolved RCRA metals will provide information as to
whether the concentrations of total RCRA metals may be biased high as the result of sediment or
particulate matter in samples.

One duplicate groundwater sample and one equipment blank sample will be collected and submitted for
laboratory analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, total RCRA metals, and
dissolved RCRA metals by EPA Method 6020/7470. One trip blank sample will accompany soil sample
containers from laboratory, to the field, and back to the laboratory and will be analyzed for VOCS by EPA
Method 8260. Attached as Appendix C are target analyte lists from Pace for EPA Methods 8260 and 8270.

One duplicate soil sample will be collected and analyzed for VOCs by EPA Method 8260, SVOCs by EPA
Method 8270, RCRA metals by EPA Method 6020/7471, and hexavalent chromium by EPA Method 7199.
One trip blank sample will accompany soil sample containers from laboratory, to the field, and back to the
laboratory and will be analyzed for VOCS by EPA Method 8260.

One duplicate soil gas sample will be collected and submitted for laboratory analysis by EPA Method TO-
15. Attached as Appendix D is the target analyte list from Pace for EPA Method TO-15.
6.0 INVESITGATION DERIVED WASTE MANAGEMENT

Investigative derived waste (IDW) generated from the construction, development, and sampling of
monitoring wells (i.e., soil cuttings, development water, and purge water) will managed in general
accordance with NCDEQ-DWM-IHSB Program’s Guidelines for Assessment and Cleanup (Revised October
2015). IDW will be placed onsite in the vicinity of the monitoring well location, unless impacts are
apparent based on field observations (i.e. visual and/or olfactory senses or elevated PID readings), in
which case these materials will be containerized. If these materials are is containerized, additional waste
characterization will be proposed and detailed in a separate work plan.

IDW generated from the soil borings (ie., soil cuttings) will be thinly spread onsite in the vicinity of the
boring location, unless impacted soil is apparent based on field observations (i.e. visual and/or olfactory
senses or elevated PID readings). If soil cuttings appear to be impacted, the soil cuttings will be
containerized. If soil cuttings are is containerized, additional waste characterization will be proposed and
detailed in a separate work plan.

Brownfields Assessment Work Plan
Affordable Custom Iron
3804 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID. 23056-19-060
January 20, 2020
11
7.0 REPORTING

At the completion of the environmental assessment activities, ECS will prepare a written report
documenting the field activities for the activities outlined in this work plan. The report will summarize
sampling procedures, sample locations, laboratory procedures and results, conclusions, and
recommendations for submission and approval by the NCBP. Boring logs, well construction records, well
development forms, groundwater sampling forms, soil gas sampling forms, and field data will be included
in the report. The report will include applicable summary tables with comparisons against applicable
screening levels, and figures depicting the sample locations, media sampled, and a potentiometric surface
map. The report will include the ECS corporate engineering and geology license numbers and the seal and
signature of a North Carolina licensed engineer or geologist.

TABLES
TABLE 1: PROPOSED SAMPLE LOCATIONS & ANALYSES
AFFORDABLE CUSTOM IRON
3804 SOUTH BOULEVARD
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT NUMBER: 23056‐19‐060
ECS PROJECT NO. 10479
VOCs SVOCs
RCRA METALS
(TOTAL)
RCRA METALS
(DISSOLVED)
Groundwater Samples
MW‐1 8260 8270 6020/7470 6020/7470
MW‐2 8260 8270 6020/7470 6020/7470
MW‐3 8260 8270 6020/7470 6020/7470
MW DUPLICATE 8260 8270 6020/7470 6020/7470
EQUIPMENT BLANK 8260 8270 6020/7470 6020/7470
TRIP BLANK 8260 NA NA NA
VOCs SVOCs RCRA METALS HEXAVALENT
CHROMIUM
SB‐13 to 5 8260 8270 6020/7471 7199
SB‐23 to 5 8260 8270 6020/7471 7199
SB‐33 to 5 8260 8270 6020/7471 7199
SB‐43 to 5 8260 8270 6020/7471 7199
SB‐53 to 5 8260 8270 6020/7471 7199
SB‐63 to 5 8260 8270 6020/7471 7199
SB‐73 to 5 8260 8270 6020/7471 7199
SB‐83 to 5 8260 8270 6020/7471 7199
SB‐9To Be Determined 8260 8270 6020/7471 7199
SB‐10 To Be Determined 8260 8270 6020/7471 7199
GRAB DUPLICATE To Be Determined 8260 8270 6020/7471 7199
TRIP BLANK N/A 8260 NA NA NA
SG‐1
SG‐2
SG‐3
SG‐4
SG DUPLICATE
Notes:
VOCs = Volatile Organic Compounds
SVOCs = Semi‐Volatile Organic Compounds
RCRA = Resource Conservation & Recovery Act
NA = Not Analyzed
N/A = Not Applicable
The soil gas duplicate will be collected with the use of a sampling tee.
TO‐15
Sample Media
Soil Samples
Sample Media
Laboratory Analysis & Analytical Method
Sample Media
TO‐15
TO‐15
TO‐15
Laboratory Analysis & Analytical Method
DEPTH OF SAMPLE
FEET BELOW GRADE
Laboratory Analysis & Analytical Method
VOCs
TO‐15
Soil Gas Samples

FIGURES
FIGURE 1SITE TOPOGRAPHIC MAP
Affordable Custom IronNorth Carolina Brownfields No. 23056-19-060
CC LoSo Station
3804 South Boulevard
Charlotte, Mecklenburg County, North CarolinaECS Project Number 49:10479
SOURCE:USGS Topographic MapCharlotte East & West North Carolina Quadrangle2016
Scale1-inch = 2,000 feet
1’2,000’1,000’
SITE
FIGURE 2SITE LOCATION MAP
Affordable Custom IronNorth Carolina Brownfields No. 23056-19-060
CC LoSo Station
3804 South Boulevard
Charlotte, Mecklenburg County, North CarolinaECS Project Number 49:10479
SOURCE:Mecklenburg County Polaris GIS December 23, 2019
SITE
Approximate Boundary of Brownfields Property
FIGURE 3SAMPLE LOCATION MAP
Affordable Custom IronNorth Carolina Brownfields No. 23056-19-060
CC LoSo Station
3804 South Boulevard
Charlotte, Mecklenburg County, North CarolinaECS Project Number 49:10479
SOURCE:
Soil Gas Assessment Report
October 10, 2019
Prepared by:
Draper Aden Associates
SG-1
SG-1
SG-3
SG-2
SG-4
SB-1 SB-2
SB-3
SB-4SB-5
SB-6 SB-7
SB-8
SB-10
MW-1
MW-2
MW-3
Approximate Area of Excavation Reported in S&ME
2007 Closure Report
SB-1 Soil Sampling Point from Boring Advanced to 5 Feet
Below Grade with Sample Collected from 3 to 5 Feet
Below Grade
SB-9 Soil Sampling Point from Boring Advanced to 10 Feet Below Grade with Sample Collected from 2-Foot Interval Selected on the Basis of Filed Screening
MW-1 Monitoring Well
SB-9

APPENDICES

APPENDIX A

APPENDIX B
1
Joseph Patrick Nestor
From:Schmithorst, William L <[e-mail]>
Sent:Thursday, December 19, 2019 3:44 PM
To:Tubridy, Michael
Cc:Peterson, Ashley; Franchina, David A.; Matthew H. McDuffie, P.G.; Joseph Patrick Nestor;
Wahl, Tracy
Subject:Affordable Custom Iron (aka LoSo Station) Request for Additional Brownfields
Assessment BF#23056-19-060
Attachments:Affordable Custom Iron Proposed Samples 23056-19-060.pdf
Dear Mr. Tubridy,

The North Carolina Department of Environmental Quality (NCDEQ) Brownfields Program has reviewed the
environmental reports submitted to the Program. Based on the information submitted, the NCDEQ is requesting the
following additional environmental sampling for brownfields assessment purposes. Note that the approximate sampling
locations are provided in the following figure. The requested samples include the following environmental media:
groundwater, soil and soil gas.

Requested Sampling:

Groundwater Samples
Collect three shallow groundwater samples from three groundwater monitoring wells at the approximate locations
shown in the attached figure. Samples are to be submitted to a laboratory for analysis of volatile organic compounds
(EPA Method 8260), semi-volatile compounds (EPA Method 8270), and RCRA metals (EPA Methods 6020/7471).

Soil Samples
Collect 10 soil samples from the approximate locations shown in the attached figure.
• Soil samples are to be collected from a depth of 3-5 feet below ground surface, with the exception of the two
soil samples located adjacent to excavation area TP-1.
• The two soil borings adjacent to former excavation location TP-1 are to be advanced to a depth of 10 feet below
ground surface. Continuous soil samples are to be collected and screened for volatile organic vapors using a
calibrated photoionization detector. The soil sample from each boring indicating the greatest potential for
impacts from volatile compounds are to be collected for laboratory analysis.
• All soil samples are to be analyzed for volatile organic compounds (EPA Method 8260), semi-volatile compounds
(EPA Method 8270), and RCRA metals plus hexavalent chromium (EPA Methods 6020/7471/7199).
• Note that soil samples may be co-located with groundwater/soil gas sample locations where applicable.

Soil Gas Samples
Collect seven soil gas samples at the approximate locations shown in the attached figure. Soil gas samples are to be
submitted to a laboratory for the analysis of volatile organic compound by EPA Method TO-15.

Please submit a work plan detailing the proposed sampling activities for NCDEQ approval prior to collecting the samples.
Note that if any of the proposed sample locations are affected by site earth moving activities, the locations and/or
sample depths may need to be modified. Please contact me if you have any questions.

Regards,
2

=======================================================
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APPENDIX C
Monday, December 23, 2019 2:03:22 PM
Profile Number 9070
Line
Acode Cmp List Cmp Analyte PQL Units
Sig
Item FigMDLCAS No.ID ID
Profile List
Line Item 8Client92-ECS
PASI Charlotte Laboratory
8 8260D WLL 8260D WLL acet Acetone ug/L E256.1767-64-1 76605 76601
benz Benzene ug/L E10.1571-43-2 76605 76601
brob Bromobenzene ug/L E10.22108-86-1 76605 76601
bcoo Bromochloromethane ug/L E10.34374-97-5 76605 76601
brod Bromodichloromethane ug/L E10.25675-27-4 76605 76601
brof Bromoform ug/L E10.61775-25-2 76605 76601
broe Bromomethane ug/L E20.6274-83-9 76605 76601
2but 2-Butanone (MEK)ug/L E53.3378-93-3 76605 76601
cate Carbon tetrachloride ug/L E10.22456-23-5 76605 76601
chlb Chlorobenzene ug/L E10.233108-90-7 76605 76601
choe Chloroethane ug/L E10.4975-00-3 76605 76601
chof Chloroform ug/L E52.3467-66-3 76605 76601
chom Chloromethane ug/L E10.38974-87-3 76605 76601
2clb 2-Chlorotoluene ug/L E10.20395-49-8 76605 76601
4clb 4-Chlorotoluene ug/L E10.204106-43-4 76605 76601
12dc 1,2-Dibromo-3-chloropropane ug/L E50.25796-12-8 76605 76601
dibm Dibromochloromethane ug/L E10.413124-48-1 76605 76601
12do 1,2-Dibromoethane (EDB)ug/L E10.258106-93-4 76605 76601
dimm Dibromomethane ug/L E10.45974-95-3 76605 76601
12db 1,2-Dichlorobenzene ug/L E10.29195-50-1 76605 76601
13dc 1,3-Dichlorobenzene ug/L E10.217541-73-1 76605 76601
14db 1,4-Dichlorobenzene ug/L E10.258106-46-7 76605 76601
difm Dichlorodifluoromethane ug/L E10.22675-71-8 76605 76601
11da 1,1-Dichloroethane ug/L E10.26875-34-3 76605 76601
12de 1,2-Dichloroethane ug/L E10.336107-06-2 76605 76601
11dd 1,1-Dichloroethene ug/L E10.24575-35-4 76605 76601
c12d cis-1,2-Dichloroethene ug/L E10.291156-59-2 76605 76601
t12d trans-1,2-Dichloroethene ug/L E10.254156-60-5 76605 76601
12dp 1,2-Dichloropropane ug/L E10.18778-87-5 76605 76601
13dp 1,3-Dichloropropane ug/L E10.158142-28-9 76605 76601
22dp 2,2-Dichloropropane ug/L E10.27594-20-7 76605 76601
11dp 1,1-Dichloropropene ug/L E10.213563-58-6 76605 76601
c13d cis-1,3-Dichloropropene ug/L E10.29610061-01-5 76605 76601
t13d trans-1,3-Dichloropropene ug/L E10.30910061-02-6 76605 76601
diie Diisopropyl ether ug/L E10.218108-20-3 76605 76601
eben Ethylbenzene ug/L E10.256100-41-4 76605 76601
h13b Hexachloro-1,3-butadiene ug/L E10.43887-68-3 76605 76601
2hex 2-Hexanone ug/L E50.568591-78-6 76605 76601
pcpi p-Isopropyltoluene ug/L E10.21299-87-6 76605 76601
mech Methylene Chloride ug/L E53.6975-09-2 76605 76601
mibk 4-Methyl-2-pentanone (MIBK)ug/L E54.53108-10-1 76605 76601
metb Methyl-tert-butyl ether ug/L E10.2751634-04-4 76605 76601
naph Naphthalene ug/L E10.35291-20-3 76605 76601
styr Styrene ug/L E10.267100-42-5 76605 76601
11tc 1,1,1,2-Tetrachloroethane ug/L E10.34630-20-6 76605 76601
11te 1,1,2,2-Tetrachloroethane ug/L E10.22279-34-5 76605 76601
tece Tetrachloroethene ug/L E10.162127-18-4 76605 76601
Page 1 of 3
Monday, December 23, 2019 2:03:24 PM
Profile Number 9070
Line
Acode Cmp List Cmp Analyte PQL Units
Sig
Item FigMDLCAS No.ID ID
Profile List
Line Item 8Client92-ECS
PASI Charlotte Laboratory
8 8260D WLL 8260D WLL tolu Toluene ug/L E10.244108-88-3 76605 76601
12tb 1,2,3-Trichlorobenzene ug/L E10.34487-61-6 76605 76601
12b4 1,2,4-Trichlorobenzene ug/L E10.218120-82-1 76605 76601
11t1 1,1,1-Trichloroethane ug/L E10.17571-55-6 76605 76601
11t2 1,1,2-Trichloroethane ug/L E10.23679-00-5 76605 76601
trce Trichloroethene ug/L E10.2279-01-6 76605 76601
trcf Trichlorofluoromethane ug/L E10.31175-69-4 76605 76601
12tp 1,2,3-Trichloropropane ug/L E10.34796-18-4 76605 76601
vace Vinyl acetate ug/L E21.45108-05-4 76605 76601
vcrd Vinyl chloride ug/L E10.24275-01-4 76605 76601
txyl Xylene (Total)ug/L E10.631330-20-7 76605 76601
mpxy m&p-Xylene ug/L E20.41179601-23-1 76605 76601
oxyl o-Xylene ug/L E10.2295-47-6 76605 76601
8270E RV 8270E WRVE acp1 Acenaphthene ug/L E101.6183-32-9 87101 76813
acp2 Acenaphthylene ug/L E101.64208-96-8 87101 76813
anil Aniline ug/L E101.8662-53-3 87101 76813
anth Anthracene ug/L E101.71120-12-7 87101 76813
beza Benzo(a)anthracene ug/L E101.7756-55-3 87101 76813
bezp Benzo(a)pyrene ug/L E102.150-32-8 87101 76813
bezf Benzo(b)fluoranthene ug/L E101.94205-99-2 87101 76813
bep2 Benzo(g,h,i)perylene ug/L E101.44191-24-2 87101 76813
bef2 Benzo(k)fluoranthene ug/L E101.94207-08-9 87101 76813
beac Benzoic Acid ug/L E504365-85-0 87101 76813
beal Benzyl alcohol ug/L E202.56100-51-6 87101 76813
4bpp 4-Bromophenylphenyl ether ug/L E101.59101-55-3 87101 76813
bbzp Butylbenzylphthalate ug/L E101.6585-68-7 87101 76813
4c3m 4-Chloro-3-methylphenol ug/L E102.859-50-7 87101 76813
4cha 4-Chloroaniline ug/L E202.76106-47-8 87101 76813
bis0 bis(2-Chloroethoxy)methane ug/L E101.8111-91-1 87101 76813
bis1 bis(2-Chloroethyl) ether ug/L E101.83111-44-4 87101 76813
2cna 2-Chloronaphthalene ug/L E101.4791-58-7 87101 76813
2cph 2-Chlorophenol ug/L E101.1895-57-8 87101 76813
4cph 4-Chlorophenylphenyl ether ug/L E101.637005-72-3 87101 76813
chry Chrysene ug/L E101.66218-01-9 87101 76813
diba Dibenz(a,h)anthracene ug/L E101.6253-70-3 87101 76813
dibz Dibenzofuran ug/L E101.52132-64-9 87101 76813
12db 1,2-Dichlorobenzene ug/L E101.3195-50-1 87101 76813
13dc 1,3-Dichlorobenzene ug/L E101.47541-73-1 87101 76813
14db 1,4-Dichlorobenzene ug/L E102.1106-46-7 87101 76813
33db 3,3'-Dichlorobenzidine ug/L E203.0491-94-1 87101 76813
24dc 2,4-Dichlorophenol ug/L E101.36120-83-2 87101 76813
dpht Diethylphthalate ug/L E102.4484-66-2 87101 76813
24dm 2,4-Dimethylphenol ug/L E101.45105-67-9 87101 76813
dipt Dimethylphthalate ug/L E101.6131-11-3 87101 76813
dnbp Di-n-butylphthalate ug/L E101.8584-74-2 87101 76813
46dp 4,6-Dinitro-2-methylphenol ug/L E2015.2534-52-1 87101 76813
24dp 2,4-Dinitrophenol ug/L E5040.551-28-5 87101 76813
Page 2 of 3
Monday, December 23, 2019 2:03:25 PM
Profile Number 9070
Line
Acode Cmp List Cmp Analyte PQL Units
Sig
Item FigMDLCAS No.ID ID
Profile List
Line Item 8Client92-ECS
PASI Charlotte Laboratory
8 8270E RV 8270E WRVE 24dt 2,4-Dinitrotoluene ug/L E101.23121-14-2 87101 76813
26dt 2,6-Dinitrotoluene ug/L E101.44606-20-2 87101 76813
dnop Di-n-octylphthalate ug/L E101.77117-84-0 87101 76813
bis4 bis(2-Ethylhexyl)phthalate ug/L E62.11117-81-7 87101 76813
flut Fluoranthene ug/L E101.69206-44-0 87101 76813
fluo Fluorene ug/L E101.6186-73-7 87101 76813
h13b Hexachloro-1,3-butadiene ug/L E101.9987-68-3 87101 76813
hecb Hexachlorobenzene ug/L E101.66118-74-1 87101 76813
hecc Hexachlorocyclopentadiene ug/L E101.6877-47-4 87101 76813
hece Hexachloroethane ug/L E101.9667-72-1 87101 76813
inde Indeno(1,2,3-cd)pyrene ug/L E101.56193-39-5 87101 76813
iso1 Isophorone ug/L E101.5778-59-1 87101 76813
1mpe 1-Methylnaphthalene ug/L E101.4490-12-0 87101 76813
2myp 2-Methylnaphthalene ug/L E101.3991-57-6 87101 76813
2mph 2-Methylphenol(o-Cresol)ug/L E101.2395-48-7 87101 76813
34mp 3&4-Methylphenol(m&p Cresol)ug/L E101.1915831-10-4 87101 76813
naph Naphthalene ug/L E101.4591-20-3 87101 76813
2nnl 2-Nitroaniline ug/L E204.1988-74-4 87101 76813
3nin 3-Nitroaniline ug/L E202.3199-09-2 87101 76813
4nin 4-Nitroaniline ug/L E202.17100-01-6 87101 76813
nitb Nitrobenzene ug/L E102.1198-95-3 87101 76813
2nph 2-Nitrophenol ug/L E101.4288-75-5 87101 76813
4nph 4-Nitrophenol ug/L E503.48100-02-7 87101 76813
nndm N-Nitrosodimethylamine ug/L E101.2262-75-9 87101 76813
nidp N-Nitroso-di-n-propylamine ug/L E102.22621-64-7 87101 76813
nndp N-Nitrosodiphenylamine ug/L E101.7286-30-6 87101 76813
22ox 2,2'-Oxybis(1-chloropropane)ug/L E102.85108-60-1 87101 76813
ptcf Pentachlorophenol ug/L E202.2287-86-5 87101 76813
phth Phenanthrene ug/L E101.7485-01-8 87101 76813
phol Phenol ug/L E100.915108-95-2 87101 76813
pyre Pyrene ug/L E102.09129-00-0 87101 76813
12b4 1,2,4-Trichlorobenzene ug/L E101.5120-82-1 87101 76813
24t5 2,4,5-Trichlorophenol ug/L E101.3995-95-4 87101 76813
24c6 2,4,6-Trichlorophenol ug/L E101.5288-06-2 87101 76813
*Signficant Figures:
Numeric Value -
E (EPA) -
M (Metals) -
O (Organics) -
The actual number of significant figures
Numbers less than 10 have 2 significant figures and numbers greater than or equal to 10 have 3 significant figures
Numbers less than 100 have 2 significant figures and numbers greater than or equal to 100 have 3 significant figures
Numbers less than 1 have 1 significant figure, numbers less than 100 but not less than 1 have 2 significant figures, and numbers
greater than or equal to 100 have 3 significant figures.
*The MDLs listed are not instrument specific.
Page 3 of 3

APPENDIX D
Pace Analytical Services, LLCMethod Detection Limits and Reporting Limitsby EPA TO15DUPAnalyte CAS #MDL (ppbv) PRL (ppbv) MWMDL (ug/m3) PRL (ug/m3)Lower Upper RPD1,1,1‐Trichloroethane71‐55‐60.0558 0.2 133.4047 0.309 1.11 70 130 251,1,2,2‐Tetrachloroethane79‐34‐50.0443 0.1 167.8498 0.309 0.698 70 132 251,1,2‐Trichloroethane79‐00‐50.0436 0.1 133.4047 0.242 0.555 70 130 251,1,2‐Trichlorotrifluoroethane76‐13‐10.0724 0.2 187.3762 0.564 1.56 70 130 251,1‐Dichloroethane75‐34‐30.0546 0.2 98.9596 0.225 0.823 70 130 251,1‐Dichloroethene75‐35‐40.0679 0.2 96.9438 0.274 0.806 70 130 251,2,4‐Trichlorobenzene120‐82‐10.493 1 181.4487 3.72 7.54 56 130 251,2,4‐Trimethylbenzene95‐63‐60.0904 0.2 120.1938 0.452 0.999 70 134 251,2‐Dibromoethane106‐93‐40.0468 0.1 187.8616 0.366 0.781 70 130 251,2‐Dichlorobenzene95‐50‐10.0814 0.2 147.0036 0.498 1.22 70 132 251,2‐Dichloroethane107‐06‐20.0365 0.1 98.9596 0.150 0.411 70 130 251,2‐Dichloropropane78‐87‐50.0490 0.2 112.9864 0.230 0.939 70 130 251,3,5‐Trimethylbenzene108‐67‐80.0798 0.2 120.1938 0.399 0.999 70 132 251,3‐Butadiene106‐99‐00.0567 0.2 54.0914 0.128 0.450 65 130 251,3‐Dichlorobenzene541‐73‐10.0951 0.2 147.0036 0.581 1.22 70 137 251,4‐Dichlorobenzene106‐46‐70.164 0.5 147.0036 1.00 3.06 70 134 252‐Butanone (MEK)78‐93‐30.123 1 72.1057 0.369 3.00 70 130 252‐Hexanone591‐78‐60.179 1 100.1589 0.745 4.16 70 135 252‐Propanol67‐63‐00.279160.1 0.697 2.50 68 130 254‐Ethyltoluene622‐96‐80.114 0.5 120.1938 0.570 2.50 70 138 254‐Methyl‐2‐pentanone (MIBK)108‐10‐10.124 1 100.1602 0.518 4.16 70 131 25Acetone67‐64‐10.499 1 58.0798 1.21 2.41 67 130 25Benzene71‐43‐20.0471 0.1 78.1134 0.153 0.325 70 130 25Benzyl Chloride100‐44‐70.228 0.5 126.58 1.20 2.63 70 130 25Bromodichloromethane75‐27‐40.0537 0.2 163.8289 0.366 1.36 70 130 25Bromoform75‐25‐20.135 0.5 252.7309 1.42 5.25 70 132 25Bromomethane74‐83‐90.0575 0.2 94.9387 0.227 0.789 69 130 25Carbon Disulfide75‐15‐00.0692 0.2 76.131 0.219 0.633 56 137 25Carbon tetrachloride56‐23‐50.0671 0.2 153.823 0.429 1.28 66 131 25Chlorobenzene108‐90‐70.0588 0.2 112.5585 0.275 0.936 70 130 25Chloroethane75‐00‐30.09690.264.5145 0.260 0.536 70 130 25LCSLAB 11/5/18 LimitsPace Analytical Services, LLC1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 612-607-1700 www.pacelabs.com
Pace Analytical Services, LLCMethod Detection Limits and Reporting Limitsby EPA TO15DUPAnalyte CAS #MDL (ppbv) PRL (ppbv) MWMDL (ug/m3) PRL (ug/m3)Lower Upper RPDChloroform67‐66‐30.0395 0.1 119.3779 0.196 0.496 70 130 25Chloromethane74‐87‐30.0742 0.2 50.4877 0.156 0.420 66 130 25cis‐1,2‐Dichloroethene156‐59‐20.0543 0.2 96.9438 0.219 0.806 70 130 25cis‐1,3‐Dichloropropene10061‐01‐50.0659 0.2 110.9706 0.304 0.923 70 133 25Cyclohexane110‐82‐70.101 0.5 84.1608 0.353 1.75 68 132 25Dibromochloromethane124‐48‐10.0830 0.2 208.2799 0.719 1.73 70 130 25Dichlorodifluoromethane75‐71‐80.0584 0.2 120.9138 0.293 1.01 70 130 25Dichlorotetrafluoroethane76‐14‐20.0615 0.2 170.9216 0.437 1.42 70 130 25Ethanol64‐17‐50.424 1 46.07 0.812 1.92 68 133 25Ethyl Acetate141‐78‐60.0518 0.2 88.106 0.190 0.733 69 130 25Ethyl Benzene100‐41‐40.0690 0.2 106.167 0.305 0.883 67 131 25Hexachlorobutadiene87‐68‐30.181 0.5 260.762 1.967 5.42 66 137 25m&p‐Xylene106‐42‐30.1580.4106.167 0.699 1.77 70 132 25Methyl Tert Butyl Ether1634‐04‐40.181 1 88.1492 0.663 3.66 70 130 25Methylene chloride75‐09‐20.342 1 84.9328 1.207 3.53 65 130 25Naphthalene91‐20‐30.246 0.5 128.1732 1.31 2.66 56 130 25n‐Heptane142‐82‐50.0913 0.2 100.2034 0.380 0.833 65 130 25n‐Hexane110‐54‐30.0867 0.2 86.1766 0.311 0.716 66 130 25o‐Xylene95‐47‐60.0780 0.2 106.167 0.344 0.883 70 130 25Propylene115‐07‐10.0802 0.2 42.0804 0.140 0.350 67 130 25Styrene100‐42‐50.0794 0.2 104.1512 0.344 0.866 69 136 25Tetrachloroethene127‐18‐40.0455 0.1 165.834 0.314 0.689 70 130 25Tetrahydrofuran109‐99‐90.0870 0.2 72.1066 0.261 0.600 68 131 25Toluene108‐88‐30.0916 0.2 92.1402 0.351 0.766 70 130 25 trans‐1,2‐dichloroethene156‐60‐50.07060.296.9438 0.285 0.806 70 130 25trans‐1,3‐Dichloropropene10061‐02‐60.0953 0.2 110.9706 0.440 0.923 70 134 25Trichloroethene79‐01‐60.0464 0.1 131.3889 0.253 0.546 70 130 25Trichlorofluoromethane75‐69‐40.0641 0.2 137.3684 0.366 1.14 65 130 25Vinyl Acetate108‐05‐40.0754 0.2 86.0902 0.270 0.716 61 133 25Vinyl chloride75‐01‐40.0485 0.1 62.4987 0.126 0.260 70 130 25LCSLAB 11/5/18 LimitsPace Analytical Services, LLC1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 612-607-1700 www.pacelabs.com
Pace Analytical Services, LLCMethod Detection Limits and Reporting Limitsby EPA TO15EXTRA ANALYTES (available upon request at an additional cost)DUPAnalyteCAS #MDL (ppbv) PRL (ppbv) MWMDL (ug/m3) PRL (ug/m3)Lower Upper RPD1,2‐Dichloroethene (Total)540‐59‐00.0706 0.4 96.9438 0.285 1.61 70 130 251,2,3‐Trimethylbenzene526‐73‐80.0807 0.2 120.19 0.403 0.999 65 147 251,4‐Dioxane123‐91‐1 0.205 1 88.1051 0.751 3.66 70 138 252,2,4‐Trimethylpentane540‐84‐1 0.145 0.5 114.22 0.689 2.37 68 138 25Acrolein107‐02‐8 0.237 0.5 56.06 0.553 1.17 55 150 25Acrylonitrile107‐13‐1 0.145 0.5 53.06 0.320 1.10 64 136 25Allyl Chloride107‐05‐1 0.234 0.5 76.525 0.744 1.59 60 145 25Chlorodifluoromethane75‐45‐60.184 0.5 86.47 0.662 1.80 70 135 25Di‐isopropyl Ether108‐20‐30.0795 1 102.1748 0.338 4.25 70 133 25Ethyl Tert‐Butyl Ether637‐92‐30.175 1 102.1748 0.741 4.25 66 139 25Isopentane78‐78‐40.0997 0.5 72.15 0.299 1.50 70 130 25Isopropylbenzene98‐82‐80.0762 0.5 120.194 0.381 2.50 70 133 25Methyl Methacrylate80‐62‐60.0951 0.2 100.12 0.396 0.832 60 144 25Methylcyclohexane108‐87‐20.0950 0.5 98.186 0.388 2.04 70 130 25N‐Butylbenzene104‐51‐8 0.201 0.5 134.2206 1.12 2.79 65 150 25N‐Propylbenzene103‐65‐1 0.0805 0.5 120.1938 0.402 2.50 70 143 25p‐Isopropyltoluene99‐87‐60.0922 0.2 134.22 0.515 1.12 70 130 25Sec‐ Butylbenzene135‐98‐8 0.155 0.5 134.2206 0.866 2.79 69 148 25Tert Amyl Methyl Ether994‐05‐80.243 1 102.1748 1.03 4.25 68 137 25Tert Butyl Alcohol (TBA)75‐65‐0 0.326 1 74.12 1.00 3.08 67 130 25Tert‐Butyl Benzene98‐06‐60.0959 0.2 134.22 0.535 1.12 70 130 25Vinyl Bromide593‐60‐2 0.0810 0.2 106.95 0.360 0.889 68 130 25THC as Gas (C4‐C12)11.95 23.951.9 104 64 140 25Xylene (Total)1330‐20‐70.1583 0.6 106.17 0.699 2.65 70 136 25Surrogates1,4‐Dichlorobenzene‐d4 (S) 3855‐82‐130150Hexane‐d14 (S)21666‐38‐630 150Toluene‐d8 (S)2037‐26‐530 150Highlighted cells are calculated resultsLCSLAB 11/5/18 LimitsPace Analytical Services, LLC1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 612-607-1700 www.pacelabs.com