23018_Corey Transmission - Brownfields Assessment Work Plan Addendum

BROWNFIELDS ASSESSMENT WORK PLAN
ADDENDUM 1.0
REVISION 1.0

COREY TRANSMISSION
511 & 527 WEST TREMONT AVENUE
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT ID. 23018-19-060

ECS PROJECT NO. 49-8458-A

PREPARED FOR
TAC TREMONT, LLC

August 2, 2019
Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
1

TABLE OF CONTENTS

1.0 PROJECT INFORMATION ............................................................................................................ 2
2.0 SCOPE OF WORK ........................................................................................................................ 4
3.0 SAMPLING METHODOLOGY & LABORATORY ANALYSIS ............................................................ 5
4.0 REPORTING ................................................................................................................................ 8

TABLES

Table 1 Proposed Sample Locations and Analyses

FIGURES

Figure 1 Site Topographic Map
Figure 2 Site Location Map
Figure 3 Proposed Soil Sample Location Map
Figure 4 Proposed Soil Gas Sample Location Map
Figure 5 Proposed Building Layout Map

APPENDICES

Appendix A Target Analyte List from Pace Analytical Services, LLC for EPA Method TO-15

Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
2
1.0 PROJECT INFORMATION

The site is currently comprised of one approximate 5.58-acre parcel identified as Mecklenburg Parcel ID
No. 11906101 located at 511 & 527 West Tremont Avenue in Charlotte, Mecklenburg County, North
Carolina and owned by Gene & Greg LLC (Figure 1 & 2). The site is currently developed with an
approximate 17,500-square foot building constructed in 1981 and an approximate 3,600-square foot
building that was constructed in 1988. Previous assessment activities include Phase I and II Environmental
Site Assessments (ESAs) completed by Salem Environmental in June and July of 2006, a Phase I ESA
completed by Enviro Scan in October 2014, a Phase I ESA completed by Summit Engineering, Inc. in
November 2015, and an Environmental Assessment and Phase I ESA completed by ECS in October 2017,
and January, 2019. The Environmental Assessment completed by ECS in October 2017 included the
collection of soil, groundwater, and soil gas samples at the site. The following recognized environmental
conditions (RECs) were identified in the previous Phase I ESAs:

• ECS considered the current and historical use of the subject property as an automotive repair
facility to be a REC of the subject property. The results from the previous environmental reports
completed at the subject property in 2006 and 2017, which identified soil, groundwater, and soil
gas impacts at concentrations that exceed the applicable standards is considered to be a REC of
the subject property.
• Based on the documented contamination and distance from the subject property and inferred
groundwater flow direction, the following facilities were considered to be RECs of the subject
property: Steve Lit, Inc., Powers Site, Beach Property, and Adams Property.
o Steve Lit, Inc., 421 West Tremont Avenue - Located on the east adjacent property and
topographically upgradient from the site. According to a 1998 Limited Site Assessment,
this facility had 2,000-gallon gasoline underground storage tank (UST) that was removed
in September 1997. Soil samples and one groundwater sample were collected in the
vicinity of the former UST. Groundwater was encountered at a depth of 10 feet below
grade. Soil sample concentrations were below detectable limits. The petroleum
hydrocarbons associated with gasoline and diesel were also below the detectable limit.
Tetrachloroethene (which is also known as perchloroethylene or PCE) was detected at 1
ug/L and naphthalene at 600 ug/L, which exceeds their respective NCDEQ 2L
Groundwater Quality Standards. This incident received a letter of No Further Action (NFA)
with a Notice of Residual Petroleum in September 1998 for the UST Section of the Division
of Waste Management (DWM). The NFA indicates that PCE was detected in monitoring
well MW-1 and will be assessed by the Division of Water Quality.
o Adams Property, 510 West Tremont Avenue - Located on the north adjacent property
and topographically upgradient from the site. According to the online North Carolina
Department of Environmental Quality (NCDEQ) Brownfields Map Viewer, this facility is
listed as "active-eligible" brownfields property. According to the 2017
brownfield application submittal, known contaminants in the groundwater/surface water
at this facility include naphthalene, lead, and manganese. It was noted that chlorinated
solvents are possible due to trace levels for nearby properties.
Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
3
o Powers Site, 436 West Tremont Avenue - Located on the north adjacent property and
topographically upgradient from the site. According to NCDEQ, this facility is listed as
active eligible North Carolina Brownfields Project as of July 6, 2017. No additional
information was available for this listing.
o Beacham Property, 420 West Tremont Avenue - Located approximately 200 feet
northeast and topographically upgradient from the site. According to the database and
information provided by the EDR report, naphthalene and low levels of PCE were
discovered in two temporary monitoring wells during a UST investigation involving one
6,000-gallon and one 1,000-gallon gasoline UST that were removed prior to 1980. The
petroleum release received a NFA with a Notice of Residual Petroleum, which disallows
the use of groundwater at this facility. Naphthalene detections in groundwater samples
collected were above the North Carolina DWM Non-Residential Vapor Intrusion Screening
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. It should be
noted that ECS submitted a work plan dated July 22, 2019 which outlined steps to construct and sample
five monitoring wells at the site and partially addressed the Request for Additional Assessment Letter
(RAA letter) prepared by the North Carolina Brownfields Program (NCBP) on July 18, 2019. 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 addendum to address remaining points in the RAA letter:

• The advancement and sampling of 4 to 5 shallow soil borings in each of five distinct areas on the
site as indicated in figure from the RAA letter for a total of 20 to 25 boring borings. A copy of
figure from the RAA letter is attached.
• The construction and sampling of a minimum of eight permanent soil gas sampling points as
described in the RAA letter.
• Completion of a Brownfields Receptor Survey.
• Preparation of a Brownfields Assessment Report which includes the items outlined in the RAA
letter.

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. Tyson Reilly
TAC Tremont, LLC
511 & 527 West Tremont Avenue
Charlotte, North Carolina 28217
Phone: [phone]
[e-mail]

Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
4
Site Environmental Representative:
Mr. Chris Orrell, P.G.
ECS Southeast, LLP
1812 Center Park Drive, Suite D
Charlotte, North Carolina 28217
Phone: [phone]
[e-mail]

NCDEQ Brownfields Program (NCBP) Contact:
Mr. Cody Cannon, Brownfields Project Manager
Phone: [phone]
[e-mail]
Mr. Cody Cannon, the NCBP Project Manager, will be notified (5) days prior to starting the field work.

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.

SOIL SAMPLING
The objective of this work plan addendum with respect to soil sampling is to advance and sample 4 to 5
shallow soil borings in each of five subsections on the site as shown in Figure 3 for a total of 20 to 25
borings.

Soil samples over the 0- to 2-foot interval from each boring in each subsection will be composited into a
single sample for analyses for semi-volatile organic compounds (SVOCs) by EPA Method 8270 and metals
regulated under the Resource Conservation and Recovery Act (RCRA metals) by EPA Method 6020. In
addition, an aliquot of each composite sample will be held pending results of the analyses for RCRA metals.
These aliquots may be analyzed for hexavalent chromium by EPA Method 7199 at a later time if deemed
appropriate by NCBP. Two grab samples will be collected from two soil borings in each subsection and
will be analyzed for volatile organic compounds (VOCs) by EPA Method 8260. The grab samples will be
selected on the basis of highest evidence of apparent impacts based upon filed screening with
photoionization detector (PID) and visual and olfactory observations.

SOIL GAS SAMPLING
The objective of this work plan addendum with respect to soil gas sampling is to complete a minimum of
eight permanent soil gas sampling points and collect samples from these points.

Soil gas samples will be analyzed for VOCs by EPA Method TO-15 and methane using a field instrument.

Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
5
BROWNFIELDS RECEPTOR SURVEY
• ECS will perform a receptor survey that includes the items outlined in the RAA letter. The survey
will be completed on forms provided by the NCBP. This survey will include the identification of
nearby property owners, a reconnaissance of the area, and a search of government databases.

3.0 SAMPLING METHODOLOGY & LABORATORY ANALYSIS

The soil and soil gas sampling will be conducted in general accordance with the North Carolina Department
of Environmental Quality - Division of Waste Management’s (NCDEQ-DWM) Inactive Hazardous Site
Program’s Guidelines for Assessment and Cleanup (Revised October 2015).

SOIL SAMPLING

The NCBP provided a map with the RAA letter which divided the site into five subsections. NCBP also
plotted five proposed sample locations within each subsection. ECS intends to collect soil samples as
outlined in the RAA letter. ECS proposes to utilize a Geoprobe® drill rig to collect continuous soil samples
at four to five of the proposed soil boring locations for each subsection. ECS will attempt to collect
samples from five locations in each subsection; however, site conditions may limit the number which may
be collected due subsurface obstructions, etc. Samples will be collected from grade to 2 feet below
ground surface (bgs) (or refusal) where there is no pavement and from immediately below the pavement
to 2 feet bgs (or refusal) where there is pavement. It should be noted that rock outcroppings were noted
at the surface of the land in the southern portions of the site. Shallow bedrock may preclude advancing
sampling tools to a depth of 2 feet bgs in some of the proposed sampling locations. Figure 3 shows the
proposed sample locations.

Samples from each subsection will be composited into a single sample and will be analyzed for SVOCs by
EPA Method 8270, and RCRA metals by EPA Method 6020. In addition, an aliquot of each composite
sample will be held pending results of the analyses for RCRA metals. These aliquots may be analyzed for
hexavalent chromium by EPA Method 7199 at a later time if deemed appropriate by NCBP. Two grab
samples will be collected from two soil borings in each subsection and will be analyzed for VOCs by EPA
Method 8260. The grab samples will be selected on the basis of highest evidence of apparent impacts
based upon field screening with photoionization detector (PID) and visual and olfactory observations. One
duplicate composite sample will be collected and analyzed for SVOCs by EPA Method 8270, and RCRA
metals by EPA Method 6020. Another duplicate soil sample will be submitted, if soil samples are
submitted for hexavalent chromium analyses by EPA Method 7199. One duplicate grab sample will be
collected and analyzed for VOCs by EPA Method 8260. One trip blank will be analyzed for VOCs by EPA
Method 8260. ECS anticipates utilizing Pace Analytical Services, LLC (Pace) for the indicated analyses. The
attached Table 1 indicates the proposed soil sample location designation, analysis and sample type.

Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
6
SOIL GAS SAMPLING
In general accordance with RAA letter, ECS proposes to collect eight soil gas samples in the vicinity of the
preliminary proposed buildings as indicated on Figure 4. ECS will contact NCBP before constructing soil
gas sampling points to obtain its concurrence on the locations of such points. It should be noted that the
RAA letters indicates that the soil gas samples should be sub-slab soil gas samples; however, after
telephone discussions with NCBP personnel, ECS understands that NCBP did not intend to specify that
samples be sub-slab soil gas samples.

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 Geoprobe® drill rig or hand auger
to a depth of 5 feet bgs. The locations of the proposed sample points will be roughly evenly spaced
between proposed buildings. 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.

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 20 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 individually 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. ECS 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. The Summa
canisters will be submitted to a North Carolina certified laboratory for analyses for VOCs by EPA Method
TO-15. North Carolina does not certify laboratories for analyses of air/soil gas samples. ECS will request
that the laboratory analyze the samples for the most current and applicable standards from the National
Environmental Laboratory Accreditation Conference (NELAC) Program. ECS anticipates submitting the
samples to Pace for the indicated analyses. One duplicate soil gas sample will be collected and submitted
for laboratory analysis by EPA Method TO-15. The attached Table 1 indicates the proposed soil gas sample
location designation, analysis and sample type. Attached as Appendix A are target analyte lists from Pace
including EPA Method TO-15.
Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
7

ECS will extract and measure methane gas concentration from each of the proposed soil gas sampling
points. Measurements will be taken at least 24 hours after completion of the proposed sampling points.
ECS will utilize a Landtec GEM™ 5000 Landfill Gas Analyzer and Extraction Monitor (or similar instrument)
for extracting and measuring methane concentrations. Calibration of the meter will be performed in
accordance with the GEM™ 5000 Operation Manual prior to use. In addition, bump tests will be
performed at the beginning and end of each day the instrument is used to verify meter calibration and
accuracy. The bump test will be performed by briefly exposing the unit to a known concentration of
methane gas (typically 50 percent). The meter reading will be compared to the actual quantity of gas as
stated on the test cylinder. Bump test readings within a range of ±3% (per specified instrument accuracy
range at full scale) of the actual test gas concentration will be considered acceptable.

ECS will connect the gas analyzer to the tubing at each sample point to purge and measure extracted
methane gas. ECS will observe the readings on the face of the instrument and record the highest percent
methane and percent of lower explosive limit reading. ECS estimates that purging of tubing will take
approximately one-half to one minute. Table 1 indicates the proposed methane sample location
designation, analysis and sample type.

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 TAC Tremont, 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.
QA/QC

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 and certificate No. 37417 for drinking water. 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)
which is administered by The NELAC Institute (TNI). ECS understands Pace is a member of the TNI.

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. The
sampling activities will be conducted in general accordance with Science and Ecosystem Support Division
Brownfields Assessment Work Plan
Addendum 1.0 (Revision 1.0)
Corey Transmission
511 & 527 West Tremont Avenue
Charlotte, Mecklenburg County, North Carolina
Brownfields Project ID: 23018-19-060
ECS Project No. 49-8458-A
August 2, 2019
8
(SESD) guidelines.

One duplicate grab soil sample will be collected and analyzed for VOCs by EPA Method 8260. One trip
blank will accompany soil sample containers and will be analyzed for VOCs by EPA Method 8260. One
duplicate soil gas sample will be collected and analyzed for VOCs by EPA Method TO-15.

Waste Disposal

Investigative derived waste (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.

4.0 REPORTING

At the completion of the environmental assessment activities, ECS will prepare a written report
documenting the field activities for the activities outlined in the work plan dated July 22, 2019 and this
work plan addendum. 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, and groundwater sampling soil gas
sampling forms, field data and the Brownfields receptor survey will be included in the report. The report
will include applicable 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
License Number and an individual PE/PG seal and signature.

TABLES
TABLE 1: PROPOSED SAMPLE LOCATIONS & ANALYSIS
COREY TRANSMISSION
511 & 527 WEST TREMONT AVENUE
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT NUMBER: 23018-19-060
ECS PROJECT NO. 8458-A
VOCs SVOCs RCRA METALS HEXAVALENT
CHROMIUM*
COMPOSITE SUBSECTION A NS 8270 6020 7199
COMPOSITE SUBSECTION B NS 8270 6020 7199
COMPOSITE SUBSECTION C NS 8270 6020 7199
COMPOSITE SUBSECTION D NS 8270 6020 7199
COMPOSITE SUBSECTION E NS 8270 6020 7199
SUBSECTION A / GRAB-1 8260 NS NS NS
SUBSECTION A / GRAB-2 8260 NS NS NS
SUBSECTION B / GRAB-1 8260 NS NS NS
SUBSECTION B / GRAB-2 8260 NS NS NS
SUBSECTION C / GRAB-1 8260 NS NS NS
SUBSECTION C / GRAB-2 8260 NS NS NS
SUBSECTION D / GRAB-1 8260 NS NS NS
SUBSECTION D / GRAB-2 8260 NS NS NS
COMPOSITE DUPLICATE NS 8270 6020 7199
GRAB DUPLICATE 8260 NS NS NS
TRIP BLANK 8260 NS NS NS
SG-1
SG-2
SG-3
SG-4
SG-5
SG-6
SG-7
SG-8
SG DUPLICATE
Notes:
VOCs = Volatile Organic Compounds
SVOCs = Semi-Volatile Organic Compounds
RCRA = Resource Conservation & Recovery Act
NS = Not Sampled
FIELD INSTRUMENT
TO-15
TO-15
TO-15
TO-15
TO-15
FIELD INSTRUMENT
FIELD INSTRUMENT
FIELD INSTRUMENT
FIELD INSTRUMENT
FIELD INSTRUMENT
* An aliquot of each composite sample will be held and may be submitted and analyzed for
hexavalent chroimum depending upon results for RCRA metals.
TO-15
TO-15
Sample Media
Soil Samples
Sample Media
Soil Gas Samples
Laboratory Analysis & Analytical Method
Laboratory Analysis & Analytical Method
VOCs METHANE
TO-15
TO-15
FIELD INSTRUMENT
FIELD INSTRUMENT
FIELD INSTRUMENT

FIGURES
FIGURE 1SITE TOPOGRAPHIC MAP
511 and 527 West Tremont AvenueCharlotte, Mecklenburg County, North Carolina
ECS Project Number 49:8458-A
SOURCE:USGS Topographic MapCharlotte East & West North Carolina Quadrangle2016
Scale
1-inch = 2,000 feet
SITE
1’2,000’1,000’
FIGURE 2SITE LOCATION MAP
511 and 527 West Tremont AvenueCharlotte, Mecklenburg County, North Carolina
ECS Project Number 49:8458-A
SOURCE:
ECS PHASE I ENVIRONMENTAL SITE ASSESSMENT
REOPORT
JUNE 2017
SCALE AS SHOWN
FIGURE 3PROPOSED SOIL SAMPLE LOCATION MAP
511 and 527 West Tremont AvenueCharlotte, Mecklenburg County, North Carolina
ECS Project Number 49:8458-A
SOURCE:
GOOGLE EARTH, DATED 2017
SCALE:
AS SHOWN
PROPOSED SOIL SAMPLE LOCATION
APPROXIMATE SITE BOUNDARY
LEGEND
SUBSECTION A
SUBSECTION D
SUBSECTION C
SUBSECTION B
SUBSECTION E
FIGURE 4PROPOSED SOIL GAS SAMPLE LOCATION MAP
511 and 527 West Tremont AvenueCharlotte, Mecklenburg County, North Carolina
ECS Project Number 49:8458-A
SOURCE:
GOOGLE EARTH, DATED 2017
SCALE:
AS SHOWN
PROPOSED SOIL GAS SAMPLE LOCATION
APPROXIMATE SITE BOUNDARY
LEGEND
SG-1
SG-8
SG-7
SG-6
SG-5
SG-4
SG-3
SG-2
FIGURE 5PROPOSED BUILDING LAYOUT MAP
511 and 527 West Tremont AvenueCharlotte, Mecklenburg County, North Carolina
ECS Project Number 49:8458-A
SOURCE:
TAC TREMONT, LLC
SCALE:
AS SHOWN

APPENDICES

APPENDIX A
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 70 135 251,1,2,2‐Tetrachloroethane79‐34‐50.0419 0.1 167.8498 0.292 0.698 70 146 251,1,2‐Trichloroethane79‐00‐50.0452 0.1 133.4047 0.250 0.555 70 135 251,1,2‐Trichlorotrifluoroethane76‐13‐10.0724 0.2 187.3762 0.564 1.56 63 139 251,1‐Dichloroethane75‐34‐30.0546 0.2 98.9596 0.225 0.823 70 134 251,1‐Dichloroethene75‐35‐40.0679 0.2 96.9438 0.274 0.806 70 137 251,2,4‐Trichlorobenzene120‐82‐10.493 1 181.4487 3.72 7.54 60 133 251,2,4‐Trimethylbenzene95‐63‐60.0904 0.2 120.1938 0.452 0.999 70 137 251,2‐Dibromoethane106‐93‐40.0468 0.1 187.8616 0.366 0.781 70 140 251,2‐Dichlorobenzene95‐50‐10.0814 0.2 147.0036 0.498 1.22 70 137 251,2‐Dichloroethane107‐06‐20.0365 0.1 98.9596 0.150 0.411 70 136 251,2‐Dichloropropane78‐87‐50.0490 0.2 112.9864 0.230 0.939 70 136 251,3,5‐Trimethylbenzene108‐67‐80.0798 0.2 120.1938 0.399 0.999 70 133 251,3‐Butadiene106‐99‐00.0567 0.2 54.0914 0.128 0.450 64 141 251,3‐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)78‐93‐3 0.123 1 72.1057 0.369 3.00 65 143 252‐Hexanone591‐78‐6 0.179 1 100.1589 0.745 4.16 60 148 252‐Propanol67‐63‐00.279 1 60.1 0.697 2.50 65 135 254‐Ethyltoluene622‐96‐80.114 0.5 120.1938 0.570 2.50 70 132 254‐Methyl‐2‐pentanone (MIBK)108‐10‐1 0.124 1 100.1602 0.518 4.16 70 135 25Acetone67‐64‐1 0.499 1 58.0798 1.21 2.41 59 132 25Benzene71‐43‐20.0471 0.1 78.1134 0.153 0.325 70 134 25Benzyl Chloride100‐44‐70.228 0.5 126.58 1.20 2.63 56 150 25Bromodichloromethane75‐27‐4 0.0537 0.2 163.8289 0.366 1.36 70 142 25Bromoform75‐25‐2 0.135 0.5 252.7309 1.42 5.25 69 150 25Bromomethane74‐83‐90.0575 0.2 94.9387 0.227 0.789 61 141 25Carbon Disulfide75‐15‐00.0692 0.2 76.131 0.219 0.633 66 134 25Carbon tetrachloride56‐23‐50.0671 0.2 153.823 0.429 1.28 60 145 25Chlorobenzene108‐90‐70.0588 0.2 112.5585 0.275 0.936 70 130 25Chloroethane75‐00‐30.0969 0.2 64.5145 0.260 0.536 65 143 25LCSKL 8/2/18Pace 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 #PRL (ppbv) MWMDL (ug/m3) PRL (ug/m3)Lower Upper RPDChloroform67‐66‐30.0395 0.1 119.3779 0.196 0.496 70 132 25Chloromethane74‐87‐30.0742 0.2 50.4877 0.156 0.420 58 140 25cis‐1,2‐Dichloroethene156‐59‐20.0543 0.2 96.9438 0.219 0.806 70 136 25cis‐1,3‐Dichloropropene10061‐01‐50.0659 0.2 110.9706 0.304 0.923 70 136 25Cyclohexane110‐82‐70.101 0.5 84.1608 0.353 1.75 70 133 25Dibromochloromethane124‐48‐10.0830 0.2 208.2799 0.719 1.73 68 149 25Dichlorodifluoromethane75‐71‐80.0584 0.2 120.9138 0.293 1.01 69 130 25Dichlorotetrafluoroethane76‐14‐20.0615 0.2 170.9216 0.437 1.42 68 130 25Ethanol64‐17‐50.424 1 46.07 0.812 1.92 65 146 25Ethyl Acetate141‐78‐6 0.0518 0.2 88.106 0.190 0.733 68 136 25Ethyl Benzene100‐41‐40.0690 0.2 106.167 0.305 0.883 70 133 25Hexachlorobutadiene87‐68‐30.181 0.5 260.762 1.967 5.42 59 140 25m&p‐Xylene106‐42‐30.158 0.4 106.167 0.699 1.77 70 133 25Methyl Tert Butyl Ether1634‐04‐4 0.181 1 88.1492 0.663 3.66 70 132 25Methylene chloride75‐09020.267 1 84.9328 0.944 3.53 67 132 25Naphthalene91‐20‐30.248 0.5 128.1732 1.32 2.66 55 136 25n‐Heptane142‐82‐50.0913 0.2 100.2034 0.380 0.833 64 136 25n‐Hexane110‐54‐30.0867 0.2 86.1766 0.311 0.716 70 130 25o‐Xylene95‐47‐60.0780 0.2 106.167 0.344 0.883 70 132 25Propylene115‐07‐1 0.0816 0.2 42.0804 0.143 0.350 37 150 25Styrene100‐42‐50.0794 0.2 104.1512 0.344 0.866 70 139 25Tetrachloroethene127‐18‐40.0455 0.1 165.834 0.314 0.689 70 133 25Tetrahydrofuran109‐99‐90.0870 0.2 72.1066 0.261 0.600 62 141 25Toluene108‐88‐30.0916 0.2 92.1402 0.351 0.766 70 130 25 trans‐1,2‐dichloroethene156‐60‐50.0706 0.2 96.9438 0.285 0.806 70 132 25trans‐1,3‐Dichloropropene10061‐02‐60.0953 0.2 110.9706 0.440 0.923 70 135 25Trichloroethene79‐01‐60.0470 0.1 131.3889 0.257 0.546 70 135 25Trichlorofluoromethane75‐69‐40.0641 0.2 137.3684 0.366 1.14 59 140 25Vinyl Acetate108‐05‐40.0754 0.2 86.0902 0.270 0.716 57 150 25Vinyl chloride75‐01‐40.0485 0.1 62.4987 0.126 0.260 70 141 25LCSKL 8/2/18Pace 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 #PRL (ppbv) MWMDL (ug/m3) PRL (ug/m3)Lower Upper RPD1,2,3‐Trimethylbenzene526‐73‐80.0807 0.2 120.19 0.403 0.999 69 150 251,4‐Dioxane 123‐91‐10.205 1 88.1051 0.751 3.66 70 145 252,2,4‐Trimethylpentane 540‐84‐10.145 0.5 114.22 0.689 2.37 70 140 25Acrolein 107‐02‐80.237 0.5 56.06 0.553 1.17 65 150 25Acrylonitrile 107‐13‐10.145 0.5 53.06 0.320 1.10 64 142 25Allyl Chloride 107‐05‐10.234 0.5 76.525 0.744 1.59 60 147 25Chlorodifluoromethane 75‐45‐6 0.184 0.5 86.47 0.662 1.80 68 142 25Di‐isopropyl Ether 108‐20‐3 0.0795 1 102.1748 0.338 4.25 70 136 25Ethyl Tert‐Butyl Ether 637‐92‐3 0.175 1 102.1748 0.741 4.25 70 136 25Isopentane 78‐78‐4 0.0997 0.5 72.15 0.299 1.50 44 150 25Isopropylbenzene98‐82‐8 0.0762 0.5 120.194 0.381 2.50 70 133 25Methyl Methacrylate 80‐62‐6 0.0951 0.2 100.12 0.396 0.832 47 150 25Methylcyclohexane 108‐87‐2 0.0950 0.5 98.186 0.388 2.04 70 137 25N‐Butylbenzene 104‐51‐80.201 0.5 134.2206 1.12 2.79 70 148 25N‐Propylbenzene 103‐65‐10.0805 0.5 120.1938 0.402 2.50 70 145 25p‐Isopropyltoluene 99‐87‐6 0.0922 0.2 134.22 0.515 1.12 70 143 25Sec‐ Butylbenzene 135‐98‐80.155 0.5 134.2206 0.866 2.79 70 142 25Tert Amyl Methyl Ether 994‐05‐8 0.243 1 102.1748 1.03 4.25 70 135 25Tert Butyl Alcohol (TBA) 75‐65‐00.326 1 74.12 1.00 3.08 63 143 25Tert‐Butyl Benzene 98‐06‐6 0.0959 0.2 134.22 0.535 1.12 70 142 25Vinyl Bromide 593‐60‐20.0810 0.2 106.95 0.360 0.889 70 140 25THC as Gas (C4‐C12)11.95 23.9 51.9 104 59 150 25Xylene (Total) 1330‐20‐7 0.1583 0.6 106.17 0.699 2.65 70 138 25Surrogates1,4‐Dichlorobenzene‐d4 (S) 3855‐82‐130 150Hexane‐d14 (S) 21666‐38‐6 30 150Toluene‐d8 (S) 2037‐26‐530 150Highlighted cells are calculated resultsLCSKL 8/2/18Pace Analytical Services, LLC1700 Elm Street SE, Suite 200 Minneapolis, MN 55414 612-607-1700 www.pacelabs.com