26015_Sawmill Hollow Woody Debris and Soil Characterization WP_20230425

Geosyntec Consultants of NC, P.C.
161 South Lexington Avenue
Asheville, NC 28801
PH 828.374.8001
www.geosyntec.com

April 25, 2023
Attention: Bill Schmithorst
Division of Waste Management – Brownfields Program
North Carolina Department of Environmental Quality
217 W Jones Street
Raleigh, North Carolina 27699-1646
[e-mail]

Subject: Woody Debris and Soil Characterization Work Plan
Site: Sawmill Hollow Property
Sawmill Hollow Road, Burnsville, North Carolina 28714 BRS Project # 26015-22-100

Dear Mr. Schmithorst:
On behalf of Northwestern Housing Enterprises, Incorporated (Prospective Developer), Geosyntec
Consultants of NC, P.C. (Geosyntec) is pleased to submit the enclosed Woody Debris and Soil
Characterization Work Plan for the above-referenced property located in Burnsville, North
Carolina (herein referred to as the “Site” or “Subject Property”) for your review and approval.
Should you have questions regarding this submittal or need additional information, please do not
hesitate to contact Mike Burcham at [phone] or [e-mail].

Sincerely,

Mike Burcham, P.E. (NC, TX) Todd N. Creamer, P.G. (NC, CA, PA, WY)
Senior Engineer Senior Principal

cc. Ned Fowler, Northwestern Housing Enterprises, Incorporated

Prepared for
Northwestern Housing Enterprises, Incorporated
P.O. Box 1673
Boone, North Carolina 28607
WOODY DEBRIS AND SOIL
CHARACTERIZATION WORK PLAN

SAWMILL HOLLOW PROPERTY
SAWMILL HOLLOW ROAD
BURNSVILLE, NC
Brownfields Project Number: 26015-22-100

Prepared by

Geosyntec Consultants of NC, P.C. 161 South Lexington Avenue Asheville, North Carolina 28801
Project Number GN9110
April 2023
Revision 0
CERTIFICATION PAGE
WOODY DEBRIS AND SOIL CHARACTERIZATION WORK PLAN
SAWMILL HOLLOW
SAWMILL HOLLOW ROAD,BURNSVILLE,NORTH CAROLINA
BROWNFIELDS PROJECT NO.26015-22-100
Prepared by:
Michael S.Burcham,PE (NC,TX)
Senior Engineer
Reviewed by:
Todd N.Creamer,P.G.(NC,CA,PA,WY)
Senior Principal
PROFESSIONAL GEOLOGIST SIGNATURE
I,Michael S.Burcham,a Licensed Professional Engincer forGeosyntecConsultants of NC.P.C..
do certify that the information in this report is correct and accurate to the best of nny knowlcdge.
Geosyntec Consultants of NC,P.C.is licensed to practice engineering in North Carolina.
The certification number (Firm's License Number)is C-3500.
Geosyntec Consultants of NC,P.C,is licensed to practice geology in North Carolina.
The certification number (Firm's License Number)is C-295,H Ca
SEAL
050312
NEER.BURCHAAELs.
Michael S.Burcham
Senior Engineer
North Carolina P.E.License No.0503 12
Expiration Date:December 3 1,2023
Geosyntec Consultants of NC,P.C.
2501 Blue Ridge Road Suite 430
Raleigh,NC 27607
Teiephone:[phone]

GN9110/CAR230081 i April 2023
TABLE OF CONTENTS
1. INTRODUCTION .................................................................................................................. 1
1.1 Site Description and History ..........................................................................................1
1.2 Site Redevelopment Plans..............................................................................................2
1.3 Work Plan Objectives ....................................................................................................2
2. SCOPE OF WORK ................................................................................................................. 2
3. SAMPLING METHODOLOGY ............................................................................................ 3
3.1 Health and Safety Planning and Utility Clearing ...........................................................3
3.2 Material Composition Evaluation ..................................................................................4
3.3 Boring Advancement and Sampling ..............................................................................5
3.4 Decontamination ............................................................................................................6
3.5 Boring Locating .............................................................................................................6
3.6 Boring Abandonment .....................................................................................................6
4. LABORATORY ANALYSIS AND REPORTING ............................................................... 6
4.1 Laboratory Analysis .......................................................................................................6
4.2 Laboratory Certifications ...............................................................................................6
4.3 Laboratory Reporting Limits .........................................................................................7
5. QUALITY ASSURANCE AND QUALITY CONTROL ....................................................... 7
5.1 Field and Laboratory Procedure QA/QC .......................................................................7
5.2 Chain of Custody QA/QC ..............................................................................................7
6. INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT ........................................ 8
7. REPORTING ........................................................................................................................... 8
8. REFERENCES ........................................................................................................................ 9

LIST OF TABLES

Table 1 Sampling and Analysis Plan
LIST OF FIGURES

Figure 1 Site Location Map
Figure 2 Test Pitting Results
LIST OF APPENDICES

Appendix A Test Pitting Photographic Log

GN9110/CAR230081 1 April 2023
1. INTRODUCTION
Geosyntec Consultants of NC, P.C. (Geosyntec) on behalf of Northwestern Housing Enterprises,
Incorporated (“NHE”) is submitting this Woody Debris and Soil Characterization Work Plan
(Work Plan) to the North Carolina Department of Environmental Quality (NCDEQ) Brownfields
Redevelopment Section (BRS) for the Sawmill Hollow Brownfields Property (“Site”). The Site is
the 3.86-acre parcel at the intersection of Sawmill Hollow Road and US Highway 19E in
Burnsville, North Carolina identified under Yancey County Parcel Number 083003244675000
(referred to herein as the “Site”) shown on Figure 1. A Letter of Eligibility (LOE) was received
for the property on November 10, 2022, indicating that the Site was eligible for entry into the BRS
and for the eventual finalization of a Brownfields Agreement (BFA). At the time of the submittal
of this Work Plan a BFA has not been finalized.
This Work Plan presents a scope of work to characterize woody debris and soil present on Site so
that the materials can be managed in accordance with a forthcoming Environmental Management
Plan (EMP), including export of the material off Site.
1.1 Site Description and History
A detailed Site history is included in the Supplemental Assessment Report (Geosyntec, 2022),
which includes descriptions of the historical on-Site operations (sawmilling and woody waste
processing). The Site is currently vacant.
The Supplemental Assessment Report (Geosyntec, 2022) also includes results from the
supplemental soil and soil gas assessment completed in September 2022. Results of the assessment
indicated that
• unacceptable risk calculated from historical groundwater data can be managed with
institutional controls;
• no unacceptable risk is posed to residents, non-residential workers, nor construction
workers by Site soils;
• no unacceptable risk is posed to residents and non-residential workers by the groundwater
to indoor air vapor intrusion (VI) pathway;
• no unacceptable risk is posed to residents and non-residential workers by the soil gas to
indoor air VI pathway;
• buried woody debris was present in the central portion of the Site; and
• methane was detected in soil gas monitored at select soil gas probes (methane monitoring
results are summarized are Figure 2).

GN9110/CAR230081 2 April 2023

Following submittal of the Supplemental Assessment Report (Geosyntec, 2022), Geosyntec
discussed the results and the Site’s path forward with the BRS. Following the discussions, the BRS
requested that preliminary investigations be completed with respect to the extent and nature of
woody debris observed on Site during the supplemental assessment. Geosyntec conducted test
pitting on Site on March 7, 2023, and the test pitting was documented in a photographic log
provided in Appendix A. Geosyntec identified the approximate boundaries of a woody debris pile
(appearing to be comprised of mulched wood; Photograph 19 of Appendix A) and a buried woody
debris mound (appearing to be comprised of mulched wood and Site soils; Photographs 7 and 12
of Appendix A) as shown in Figure 2. The areas with stockpiled and buried woody debris
generally correspond to areas where Geosyntec measured methane in soil gas greater than 1.25
percent by volume. This has prompted NHE’s plan to remove the woody debris from the Site prior
to redevelopment.
1.2 Site Redevelopment Plans
NHE intends to redevelop the Site under the BRS into a rental community including 27 affordable
small rental homes, a community building with amenities, and a playground. Each home will be
approximately 450 to 650 square feet and will be part of a single rental entity; homes will not be
sold individually. The redevelopment is funded in part by Dogwood Health Trust to supply
affordable housing options for those currently housed in pre-1975 mobile homes.
1.3 Work Plan Objectives
The objective of this Work Plan is to outline the means and methods for sampling and
characterizing material (i.e., woody debris, soil, or some combination of the two) located at the
Site to support material export. This Work Plan is intended to support the redevelopment process
and will be referenced in the forthcoming EMP. This Work Plan is being submitted before the
EMP to expedite the sampling and characterization of known on-Site piles/mounds of material
containing woody debris, but may be used to guide future soil and/or woody debris export as
needed in connection with implementation of the EMP.
This Work Plan was prepared in general accordance with the Minimum Requirements Checklist
for Site Assessment Work Plans and Reports (NCDEQ, 2022a)
2. SCOPE OF WORK
The scope of work includes characterizing woody debris and soil for potential export from the Site.
The presence of piles of woody debris and soils have been well documented at the Site, but the
volume of these piles have not been calculated. Given this, and that this Work Plan is planned to
be referenced throughout the redevelopment process as needed, this Work Plan provides a generic
approach to material characterization that can be tailored to the specific material that will be

GN9110/CAR230081 3 April 2023

exported. Furthermore, as described in Section 1.3, the forthcoming EMP will reference this Work
Plan when addressing material export.
When woody debris or soil is identified for export, the location and volume of the material will be
documented and communicated to the BRS. The portion of the material that will be sampled for
export will be delineated and marked with stakes, marking flags, or equivalent materials. The
delineated area will be documented in the field.
The material sampling frequency and export options will be based on material composition, which
will be evaluated prior to and during sampling (Section 3.2). Material composition will be used to
initially identify the frequency of sampling as follows:
• One sample will be collected per every 500 cubic yards (CY) for materials identified as
woody debris that does not contain soil.
• One sample will be collected per every 1,000 CY for materials identified as woody debris
that contain soil.
• One sample will be collected per every 1,000 CY for materials identified as soil.
The sampling frequency may need to be adjusted based on the land use (i.e., residential,
commercial, industrial) for the proposed export Site. BRS approval of the sampling frequency will
be obtained prior to the start of work.
Soil or woody debris samples will be collected using either a hand auger or an excavation bucket
(Section 3.3). Visual inspections of material will be performed during boring advancement and
sample collection to evaluate composition. Soil and woody debris samples will be collected as
shown in Table 1 and as described in Section 3.3.
A description of field methods and sampling techniques is presented in the following sections, as
well as laboratory analyses, associated quality assurance and quality control (QA/QC) measures,
investigation-derived waste (IDW) management procedures, and associated reporting.
3. SAMPLING METHODOLOGY
3.1 Health and Safety Planning and Utility Clearing
Prior to the start of work, Geosyntec will prepare a Site-specific Health and Safety Task Hazard
Analysis in general accordance with the Occupation Safety and Health Administration (OSHA)
rules (29 CFR 1910.120).
A private utility location service will be used prior to the start of work for the excavation of
materials not currently stockpiled.

GN9110/CAR230081 4 April 2023

3.2 Material Composition Evaluation
As described in Section 2, sampling frequency for export material will be based on material
composition. To evaluate whether soil is present in woody debris being characterized for export,
Geosyntec will use professional judgement and observations/information from: (i) previously
completed investigations; (ii) future Site redevelopment activities; and/or (iii) boring advancement
(Section 3.3).
For the purpose of this Work Plan, woody debris will be defined and characterized as organic
material/particles which contain wood debris in the consistency of dust, chips, shards, and mulch
(Photograph 19 of Appendix A). For the purpose of this Work Plan, soil will be defined as
inorganic particles from the mechanical and/or chemical weathering of rock. Geosyntec will use
professional judgement and the following criteria to decide whether the material being evaluated
is woody debris or is a mixture of woody debris and soil:
• Material Setting: If evaluating materials at grade, the characteristics of the material setting
will be evaluated. Does the material appear to have been disturbed and/or placed at its
current location? Or does the material appear to have more natural features (e.g., heavily
vegetated)?
o If material containing woody debris is identified below soils and was used as
subsurface fill on Site, it will be considered woody debris that contains soil for the
purpose of characterization and export.
• Material Composition: Based on visual observation, is a non-de minimis amount of soil
mixed into the woody debris or does the material appear to wholly consist of processed and
decomposing plant material that is free of soil?
o For reference, during supplemental assessment and test pitting Site soils have been
identified to have the characteristics listed below.
 Color: Site soils are typically a dark brown (topsoil) and reddish brown to
yellowish red (subsoil, Photograph 10 of Appendix A).
 Grain size: Site soils range from silty sand (topsoil) to sandy clay, silty clay,
and sandy silt (subsoil).
 Additional observations: Site soils have been observed to have rocks
ranging from 2 to 6 inches (Photograph 23 of Appendix A) as well as
fragments of quartz ranging from 0.25 to 2 inches.
o There is a possibility that these characteristics are not representative of all soil
present on Site. Therefore, professional judgement will be used when visually
evaluating the export material to decide whether a non-de minimis amount of
non-Site soil is present as well.

GN9110/CAR230081 5 April 2023

Prior to advancing borings for export characterization, Geosyntec will communicate to the BRS
the material composition and the proposed sampling frequency for the material.
During boring advancement, sampling frequency will be adjusted if the material composition
deviates from what was previously observed. The absence or presence of soil during boring
advancement will be documented and provided to the BRS with the laboratory analytical results
(Section 7).
3.3 Boring Advancement and Sampling
Once material composition has been evaluated and a sampling frequency selected, Geosyntec will
partition the export material on Site into multiple characterization areas, with each characterization
area being no larger than the minimum volume for characterization (500 or 1,000 CY). The
material volume will be estimated using the geometry of the sampling area and the methods
outlined in the North Carolina Underground Tank Section’s Guidelines for Sampling (NCDEQ,
2022b), as applicable. Geosyntec will then advance borings to collect and analyze material samples
for the analyses indicated in Table 1.
Geosyntec will use hand augers when feasible to collect borings. However, conditions may not
allow the use of hand augers at each boring location; therefore, an excavator bucket may be used.
Should the excavator bucket be used, either a hand auger or stainless steel hand spade will be used
to collect material from the bucket for screening/sampling. It is not anticipated that a drill rig will
be used to collect samples for material export characterization.
Geosyntec will complete three borings within each characterization area. Material will be screened
at least once every 1 foot using a Photoionization Detector (PID) for evidence of total volatile
organic compounds (VOCs) and to identify sampling locations using the method described below.
Material will also be classified according to the Unified Soil Classification System (USCS). Field
screening results will be included in boring logs that will be included in the relevant report
documentation (Section 7).
One discrete grab sample will be collected for VOC analysis from the boring within each
characterization area with the highest field screening results using laboratory supplied grab sample
equipment (i.e., Terra Core® or equivalent). The discrete grab sample will be collected directly
from the sampling device (e.g., open-faced hand auger, excavator bucket) upon identification of
an elevated PID reading (this may result in the collection of multiple grab samples, but only the
sample with the highest PID reading will be analyzed). The discrete grab sample will not be
collected from composited material. Also, if woody debris is being sampled, larger pieces of
woody debris will not be included in the sample, per the laboratory’s requirement.

GN9110/CAR230081 6 April 2023

Remaining material from the three borings collected within each characterization area will be
homogenized in a decontaminated stainless-steel bowl (or equivalent) and placed into
laboratory-supplied bottle wares.
Bottle wares will be labeled with a sample ID as described in Table 1; sample date and time will
also be documented on the bottle wares. The bottle wares will be placed on ice and submitted to a
certified laboratory (Section 4.2) for analysis following chain-of-custody procedures (Section 5.2).
3.4 Decontamination
Disposable equipment will be used as practical. However, as needed, equipment will be
decontaminated using an initial water rinse followed by cleaning with Alconox® (or equivalent)
and final rinse of distilled water.
3.5 Boring Locating
The approximate volume and dimensions of material being characterized for export will be
documented, and a sketch or figure of the approximate locations of the characterization areas and
borings will be generated and provided to the BRS with the analytical data (Section 7).
3.6 Boring Abandonment
For samples collected from stockpiled material, boring abandonment will not be required. For
samples collected from Site features such as the woody debris pile, borings will be abandoned by
placing material back into the boreholes.
4. LABORATORY ANALYSIS AND REPORTING
4.1 Laboratory Analysis
Collected samples will be placed in laboratory-provided sample containers with sufficient volume
and submitted to a North Carolina-certified environmental laboratory under chain-of-custody
procedures (Section 5.2) for the analyses described in Table 1.
4.2 Laboratory Certifications
Samples will be submitted to a North Carolina National Environmental Laboratory Program
(NELAP)-certified laboratory, accredited in the State of North Carolina by the NCDEQ Division
of Water Quality and the North Carolina Department of Health.

GN9110/CAR230081 7 April 2023

4.3 Laboratory Reporting Limits
Laboratory reporting limits (RLs) and method detection limits (MDLs) used for methods indicated
in Table 1 will, to the extent feasible, meet respective NCDEQ Division of Waste Management
(DWM), IHSB protection of groundwater or residential PSRG, whichever is lowest (NCDEQ,
2023b).
Concentrations detected between the RL and MDL will be reported as estimated values and
flagged in the laboratory analytical report with a “J” qualified. Level II Quality Assurance
(QA)/Quality Control (QC) will be reported by the laboratory in the analytical report deliverable.
5. QUALITY ASSURANCE AND QUALITY CONTROL
5.1 Field and Laboratory Procedure QA/QC
As indicated in Table 1, at least one blind duplicate sample will be collected per 20 samples
collected and submitted for laboratory analysis, per method. QA/QC will also include one trip
blank for VOC analysis by USEPA Method 8260 per cooler containing VOC samples.
Confirmation of sample temperature will also be measured at the laboratory via infrared
thermometer for each cooler containing samples.
The lab will be provided sufficient sample volume for Matrix Spike/Matrix Spike Duplicate
(MS/MSD) analysis.
5.2 Chain of Custody QA/QC
Geosyntec will initiate chain of custodies for samples in the field documenting sample collection
information including but not limited to
• the sample collector’s name;
• project information and location;
• Geosyntec project manager contact information;
• sample ID;
• date and time of sample collection;
• type of analysis; and
• type and number of containers and associated preservative, if applicable.
Samples will remain in the custody of Geosyntec until they are ready for shipment. Geosyntec will
relinquish the samples and chain of custodies (noting date and time of relinquishment) to the

GN9110/CAR230081 8 April 2023

laboratory courier (or use a custody seal during sample shipment) who will sign the chain of
custody as receiver (noting date and time again). Geosyntec will retain a copy of the chain of
custodies signed by the courier. If a standard shipping service (e.g., FedEx) is used to transport
samples instead of a courier, the shipping service will not sign the chains of custody as receiver.
Samples and the chain of custodies will be sealed in an appropriate shipping container/box and
sent to the address of the selected laboratory.
A representative from the selected laboratory’s sample receiving will sign respective chains of
custody verifying receipt of the samples by each respective laboratory location. A copy of fully
executed chains of custody will be provided in the final laboratory analytical report deliverable.
6. INVESTIGATION DERIVED WASTE (IDW) MANAGEMENT
The volume of IDW generated during any export material sampling event is anticipated to be small
and is related to the collection of samples from a Site that has been partially characterized;
therefore, IDW will not be drummed/containerized for off-Site disposal unless field screening and
observations indicate a potential for impacts.
Solid IDW will be placed back into the open boreholes. Liquid IDW generated will be poured onto
the surface where the samples were collected.
7. REPORTING
Upon receipt of laboratory results, Geosyntec will communicate the results to the BRS.
Geosyntec will provide an e-mail summarizing: (i) the scope of work executed; (ii) sample
laboratory analytical results; (iii) conclusions regarding material use; and (iv) if selected by the
time of submittal, the proposed export location. Attached to the email will be tabulated sample
results that are compared to PSRGs and figures/sketches depicting the location of actual sample
locations. If detected compounds are greater than PSRGs, analytical results will also be evaluated
using the most up-to-date version of the NCDEQ Risk Calculator (NCDEQ, 2023a), and the
NCDEQ Risk Calculator results will be provided. Geosyntec will also provide laboratory
analytical reports.
BRS approval shall be obtained prior to exporting the sampled material.
These activities and results will be formally documented on an annual basis in the annual
Redevelopment Summary Report. The Redevelopment Summary Report will include Geosyntec’s
Corporate Professional Engineer (PE)/Professional Geology (PG) License Numbers and will be
sealed and signed by the licensed PE or PG who oversaw the work.

GN9110/CAR230081 9 April 2023

8. REFERENCES
Geosyntec, 2022. Supplemental Assessment Report. December 2022
NCDEQ, 2022a. Minimum Requirements Checklist of Site Assessment Work Plans and Reports.
February 2022
NCDEQ, 2022b. Guidelines for Sampling. March 2022
NCDEQ, 2023a. DEQ Risk Calculator. January 2023
NCDEQ, 2023b. Preliminary Soil Remediation Goals Table. January 2023

TABLE
Grab
VOCs RCRA 8 Metals Cr(VI)SVOCs
Soil Sampling Total Samples per Characterization Area Excluding QA/QC 3 1 1 1 1
WD-XX-01
WD-XX-02
WD-XX-03
SB-XX-01
SB-XX-02
SB-XX-03
Notes:
2. Maximum depth is to be determined at the time of sampling based on the size and orientation of the material being sampled.
Acronyms:
BLS: below land surface Cr(VI): chromium VI analyzed by EPA Method 7199
CY: cubic yards RCRA 8 metals: Resource Conservation and Recovery Act metals analyzed by EPA Method 6010 and 7471
EPA: Environmental Protection Agency SVOCs: semi-volatile organic compounds analyzed by EPA Method 8270
ft: feet VOCs: volatile organic compounds analyzed by EPA Method 8260
4. Sample ID will include the soil boring ID (grab sample) or characterization area ID (composite sample) along with the date in YYYYMMDD format.
1. Soil boring ID will be identified by material composition ("WD" for woody debris or "SB" for Site soils and soils with woody debris) followed by the characterization area ID identified here as "XX" and a unique borehole number.
Table 1
Sampling and Analysis Plan
Sawmill Village - Burnsville, North Carolina
Metals and SVOCs: Composite
of samples collected in each
characterization area
(1 duplicate)
VOCs: Highest PID Reading for
each characterization area
analyzed
(1 duplicate, 1 trip blank)
Woody Debris
Sample Material Soil Boring ID1 Sample Frequency Sample Objective
Maximum Boring
Depth
(ft BLS)2
Sample Method
Collection and Analytical Method
Composite
3. One quality assurance/quality control (QA/QC) blind duplicate soil sample will be collected per 20 samples collected per method. A trip blank will be included in each cooler containing soil VOC samples.
Three borings in one characterization area. Each
characterization area is equal to 500 CY 1
Woody Debris with Soil
or
Soil
1 11 1
To Be Determined
To Be DeterminedThree borings in one characterization area. Each
characterization area is equal to 1,000 CY
1 per 500 CY
1 per 1,000 CY
1 11
1 of 1

FIGURES
R:\N\Northwestern Housing Enterprises\Sawmill Village\7.0 GIS\MXDs\Supplemental Report\Figure 1 Site Location Map.mxd 4/11/2023 3:45:37 PM NC
0 1,000
Feet
³Sawmill Hollow Road
Burnsville, North Carolina
Site Location Map
Figure
1
Asheville, NC April 2023
Legend
Notes:
1. Base map from USGS National Topogrpahpic Map, 7.5'
Burnsville, NC.
2. Parcel Boundary Data from Yancey County GIS.
Site Location
Site Location
>
>
>
>
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
"")
"")
"")
"")
"")
"")
")
")
"")
"")Sawmill Hollow RoadUS Highway 19E
F air H aven D riv eSegment 4
Segment 5
Segment 3
Segment 2
Segment 1
TP-07
TP-12
TP-10
TP-03
TP-09
TP-11
TP-06
TP-08
TP-05
TP-01
SB-06
SB-07
SB-05
SB-04
SB-03
SB-02
SB-01
SB-08
SB-09
SB-10
SG-04
SG-05
SG-03
SG-02
SG-01
SG-08
SG-06
SG-07
SG-09
SG-10
VP-3
VP-4
VP-2
VP-5
R:\N\Northwestern Housing Enterprises\Sawmill Village\7.0 GIS\MXDs\Supplemental Report\Figure 2 Test Pitting Results.mxd 4/11/2023 3:37:42 PM
Sawmill Hollow Road
Burnsville, North Carolina
Test Pitting Results
0 50
Feet
³Figure
2
Asheville, NC April 2023
Legend
Site Boundary
Former Building
Proposed Community Center
Proposed Housing Unit
Proposed Road
Sampling Segments
Perimeter of Observed Mulch Pile
Approximate Extent of Buried
Woody Debris
"")Test Pit with Woody Debris
")Test Pit without Woody Debris
!(Soil Boring Location
!(Soil Gas Sample Location
>Historical Soil Vapor ProbeNotes:
1. Parcel boundary from Yancey County GIS.
2. Methane screening results and initial pressure measurements collected using GEM 5000 ladfill gas meter.
3. Initial pressure measurements collected using a Dwyer Series 475-3-FM manometer prior to purging. Methane screening results collected
using a GEM 5000 landfill gas meter.
4. Static Pressure results are reported in inches of water ("H2O).
5. Basemap from Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS
User Community.
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-01 0.0 0.0
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-02 0.0 0.0
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-03 0.0 0.0
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-04 0.0 1.3
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-05 0.0 5.1
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-06 0.0 1.2
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-07 0.0 0.3
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-08 0.0 0.0
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-09 0.0 0.4
Sample
Location
Static Pressure
("H2O)
Methane
(% volume)
SG-10 0.0 0.0

APPENDIX A

Test Pitting Photographic Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville, NC
A - 1 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 1
Date:06 March 2023
Direction:S
Comments:
Observing the Site from the north (Fair Haven
Drive in the foreground). Northern side of piles
of woody debris/topsoil material.
Photograph 2
Date:06 March 2023
Direction:N
Comments:
Photo taken in central portion of site. On right,
western side of mulch stockpile. On left, pile of
mix of wood debris/mulch and topsoil.
A - 2 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 3
Date:06 March 2023
Direction:N
Comments:
Southern side of mulch pile.
Photograph 4
Date:06 March 2023
Direction:N
Comments:
Photo taken on top of mulch pile. East side of
mulch pile on the left. Central portion of the
site. Based on TP-03, flat grade in central
portion is native soil (reddish brown sandy
clay).
A - 3 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 5
Date:06 March 2023
Direction:N
Comments:
Photo taken from pile of mix of topsoil and
mulch. Stockpile in background appears to be
tree branches and other large woody debris on
grade.
Photograph 6
Date:06 March 2023
Direction:NE
Comments:
Location TP-01 in northern portion of Site
between SG-04 and SG-05. On the northern
gentle slope of pile mixed with topsoil and
wood debris/mulch.
A - 4 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 7
Date:06 March 2023
Direction:NE
Comments:
Dark brown silty sand soil with organics
(topsoil) mixed with mulch encountered in top
2 feet (ft) of TP-01.
Photograph 8
Date:06 March 2023
Direction:NE
Comments:
Mulch encountered at 3-4 feet below ground
surface (ft bgs) in TP-01.
A - 5 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 9
Date:06 March 2023
Direction:SE
Comments:
TP-01 excavated to depth of 4-4.5 ft. Top 2 ft was
dark brown silty sand soil with organics (topsoil)
mixed with mulch. Mulch content increased at 3
ft. Mulch not encountered at 4.5 ft bgs. Water
infiltrated when excavating 3 to 4 ft.
Approximately 5 inches (in) of water ponded at
bottom of test pit. Interpreted as infiltrated
stormwater from recent rain event.
Photograph 10
Date:06 March 2023
Direction:N
Comments:
TP-03 excavated to depth of 1 ft. Observed
native soil which consists of reddish brown
sandy clay (low plasticity to non-plastic) with
quartz fragments (0.5 to 2 in).
A - 6 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 11
Date:06 March 2023
Direction:N
Comments:
TP-03 is located in the central portion south
and east of piles.
Photograph 12
Date:06 March 2023
Direction:S
Comments:
TP-05 excavated to depth of 4-5 ft. Top 2 ft
was dark reddish brown sandy silt with little
wood debris/mulch (~10%). At 2 ft, wood
debris/mulch content increases and by 4 ft it
was mulch/wood debris (greater than 90%).
Determined north/northwestern extent of mulch
stockpile with a layer of soil on top.
A - 7 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 13
Date:06 March 2023
Direction:N
Comments:
Wood debris mulch encountered at 4-5 ft bgs in
TP-05.
Photograph 14
Date:06 March 2023
Direction:N
Comments:
TP-06 excavated depth of 6 ft into northern
slope of mulch pile.
A - 8 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 15
Date:06 March 2023
Direction:W
Comments:
TP-06 excavated to depth of 6 ft on the
northern slope of mulch stockpile delineated on
figure. Mulch/wood debris encountered to
depth of 6 ft.
Photograph 16
Date:06 March 2023
Direction:N
Comments:
TP-07 excavated depth of 4 ft into eastern
slope of mulch pile.
A - 9 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 17
Date:06 March 2023
Direction:N
Comments:
TP-07 consisted of mostly mulch/wood debris.
Located on the eastern side of the mulch
stockpile delineated on figure.
Photograph 18
Date:06 March 2023
Direction:N
Comments:
TP-08 excavated a depth of 3 ft into southern
slope of mulch stockpile. Mostly mulch/wood
debris encountered with no native soil
observed.
A - 10 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 19
Date:06 March 2023
Direction:N
Comments:
Mulch/wood debris observed in TP-08.
Photograph 20
Date:06 March 2023
Direction:N
Comments:
TP-09 from 3-5 ft bgs observed mostly dark
brown mulch/wood debris (greater than 90%
mulch).
A - 11 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 21
Date:06 March 2023
Direction:N
Comments:
Top 1 ft of TP-09 was dark brown sandy silt
with organics (topsoil). From 1-3 ft bgs, mix of
topsoil and mulch (50%/50%). From 3-5 ft bgs,
dark brown mulch/wood debris.
Photograph 22
Date:06 March 2023
Direction:N
Comments:
Location of TP-09 on southern slope of pile
that is mixed with topsoil and mulch.
A - 12 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 23
Date:06 March 2023
Direction:SW
Comments:
TP-10 excavated to 4 ft bgs. The top 2 ft was
reddish brown silty-clayey sand (SM-SC) with
well-rounded cobbles (4 to 6 in). Deeper soil (2-4
ft bgs) contained some organics (e.g. sticks,
broken branches) and was darker in color.
However, the organic material was different in
consistency than what was observed in the woody
debris/mulch and topsoil piles.
Photograph 24
Date:06 March 2023
Direction:N
Comments:
TP-10 located on eastern slope of topographic
feature.
A - 13 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 25
Date:06 March 2023
Direction:N
Comments:
TP-11 excavated to 5 ft bgs. From 0-2 ft bgs,
dark brown sandy silt with organics and mulch
(topsoil, with 30% mulch). From 2-3 ft bgs,
mix of topsoil and mulch (60%/40%). From 3
to 5 ft bgs, dark brown mulch/wood debris.
Photograph 26
Date:06 March 2023
Direction:NW
Comments:
Mulch/wood debris observed in TP-11 from 3
to 5 ft bgs.
A - 14 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log
GEOSYNTEC CONSULTANTS
Photographic Record
Client:Northwestern Housing Enterprise Project Number:GN9110
Site Name:Sawmill Village Site Location:Burnsville , NC
Photograph 27
Date:06 March 2023
Direction:E
Comments:
Dark brown sandy silt with organics (topsoil)
in top 1 ft of TP-12. From 1 to 1.5 ft bgs, wood
debris/mulch encountered (60%).
Photograph 28
Date:06 March 2023
Direction:E
Comments:
TP-12 excavated to depth of 4 ft. Dark brown
sandy silt with organics (topsoil) in top foot
from 1 to 1.5 wood debris/mulch encountered
(60%). Dark brown mulch/wood debris with
minimal soil form 1.5 to bottom of test pit (4
ft).
A - 15 Apr-23GN9110, Burnsville, NC, 28714, (Sawmill Village) - Photo Log