6003_Mecklenburg_YorkRoad_MSWLF_GW_FID1680263_20220531

EHFt LISE QHLY: ❑Paper Report QElectronic Data - Email CD data loaded: Yes / No Doc/Event #:
NC DENR I IEnvironmental Monitoring
Division of Waste Management - Solid Waste Reporting Form
—CoNotice: This form and any information attached it are "Public Records" as defined in NC General Statute 132-1, As such, these documents are
available for inspection and examination by any person upon request (NC General Statute 132-6).
Instructions:
• Prepare one form for each individually monitored unit.
• Please type or print legibly.
Attach a notification table with values that attain or exceed INC 2L groundwater standards or NC 26 surface water standards. The notification
must include a preliminary analysis of the cause and significance of each value. (e.g. naturally occurring, off -site source, pre-existing
condition, etc.).
a notification table of any groundwater or surface water values that equal o exceed the reportinglimits-
Attach
Attach a notification table of any methane gas values that attain or exceed explosive gas levels. This includes any structures on or nearby the
facility (NCAC 13B .1629 (4)(a)(i).
• Send the original signed and sealed form, any tables, and Electronic Data Deliverable to: Compliance Unit, NCDENR-DWM, Solid Waste
Section, 1646 Mail Service Center, Raleigh, NC 27699-1646.
Solid Waste Monitarin Data Submittal Information
Name of entity submitting data (laboratory, consultant, facility owner):
Geosyntec Consultants of INC, P.C. —
Contact for questions about data formatting. Include data preparer's name, telephone number and E-mail address:
Name: Am Kenwell
E-mail: AKenwell@Geosyntec-com
Facility name'
City of Charlotte
Former York Road Landfill
Facility Address:
1525 West Tyvola Road
Charlotte, NC 28217
Phone: [phone]
Environmental Status: (Check all that apply)
Initial/Background Monitoring Q Detection Monitoring
of data submitted: (Check all that apply)
Groundwater monitoring data from monitoring wells Q
Groundwater monitoring data from private water supply wells
Leachate monitoring data
Riirl`Rnp water monitoring data
NC Landfill Rule: Actual sampling dates (e g.,
Facility Permit # (.0500'or .1600) October 20-24, 2006)
Groundwater: Mar 7-30 2022
Surface Water: Mar 30 2022
60-03 .0500 Landfill Gas: Jan 10-12 and
Apr 4-6 2022
Q Assessment Monitoring D Corrective Action
Methane gas monitoring data
Corrective action data (specify) —
Other(specify) —
Notification attached?
No. No groundwater or surface water standards were exceeded.
)( Yes. a notification of values exceeding a groundwater or surface water standard is attached. It includes a list of groundwater and surface water
monitoring points, dates, analytical values, NC 2L groundwater standard. NC 2B surface water standard or NC Solid Waste GWPS and
preliminary analysis of the cause and significance of any concentralion -
0 Yes, a notification of values exceeding an explosive methane gas limit is attached. It includes the methane monitoring points, dates, sample
values and explosive methane gas limits.
Certification
To the best of my knowledge, the information reported and statements made on this data submittal and attachments are true and correct.
Furthermore, I have attached complete notification of any sampling values meeting or exceeding groundwater standards or explosive gas
levels, and a preliminary analysis of the cause and significance of concentrations exceeding groundwater standards. I am aware that there
are significant penalties for making any false statement, representation, or certification including the possibility of a fine and imprisonment.
Amy Kenwell
Project Geologist [phone]
Facility Representative Name (Print) Title (Area Code) Telephone Number LM11aerrrrq
05/31/2021 Affix NC L1 VA$ P�efesologist Seal
Signatur Date
P ` 0
1300 South Mint Street Suite 300, Charlotte, NC, 28203 — ��L 7
Facility Representative Address
C-3500
NC PE Firm License Number (if applicable effective May 1, 2009)
Revised 612009

•
CHARLOTTE
Prepared for
City of Charlotte
General Services Department
600 East 4th Street
Charlotte, NC 28202
SEMI-ANNUAL MONITORING REPORT
FIRST HALF 2022
FORMER YORK ROAD LANDFILL
NC DEQ PERMIT NO. 60-03
CHARLOTTE, NORTH CAROLINA
Prepared by:
Geosyntec'�'
consultants
Geosyntec Consultants of NC, P.C.
1300 S. Mint St., Suite 300
Charlotte, NC 28203
Project Number: GC5699G
May 2022

Geosptec
consultants
Geosyntec Consultants of NC, P.C.
Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
TABLE OF CONTENTS
1. INTRODUCTION................................................................................................ 1
1.1
Site Description and History........................................................................ 1
1.2
Hydrogeologic Setting................................................................................. 2
1.3
Regulatory Authority................................................................................... 3
2. MONITORING ACTIVITIES AND FIELD METHODOLOGY ....................... 4
2.1
Groundwater Monitoring............................................................................. 4
2.2
Surface Water Monitoring........................................................................... 5
2.3
Water Supply Wells..................................................................................... 6
2.4
Methane Monitoring.................................................................................... 6
2.4.1 Routine Methane Monitoring Activities ......................................... 6
3. MONITORING RESULTS.................................................................................. 8
3.1
Groundwater................................................................................................
8
3.1.1 Potentiometric Surface Elevation and Groundwater Flow
Direction.........................................................................................
8
3.1.2 Groundwater Analytical Results ....................................................
8
3.2
Surface Water............................................................................................
12
3.3
Methane.....................................................................................................
13
3.3.1 Passive Methane Monitoring Points .............................................
13
3.3.2 Active Extraction Systems...........................................................
15
3.3.3 Methane Detection Systems.........................................................
17
3.3.4 Landfill Cap Inspection and Repairs ............................................
18
4. SUMMARY, CONCLUSIONS, AND RECOMMENDATIONS .....................
20
4.1
Groundwater..............................................................................................
20
4.2
Surface Water............................................................................................
20
4.3
Methane.....................................................................................................
20
4.4
Additional Activities..................................................................................
21
4.5
Future Work...............................................................................................
22
5. REFERENCES................................................................................................... 23
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Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
LIST OF TABLES
Table 1
Landfill Gas Sampling Schedule
Table 2
Groundwater and Surface Water Sampling Schedule
Table 3
Groundwater Well Construction Details
Table 4
Historical Groundwater Elevations
Table 5
March 2022 Detected Constituents in Groundwater
Table 6
Summary of Mann -Kendall Trend Analysis for VOCs
Table 7
March 2022 Detected Constituents in Surface Water
Table 8
Recent Methane Detections at Select Locations
Table 9
Landfill Gas and Vacuum Readings — Northeast Boundary
LIST OF FIGURES
Figure 1 Site Location Map
Figure 2 Groundwater and Surface Water Sampling Locations and Selected Site
Features
Figure 3A
Landfill Gas Monitoring Features and Structures (1 of 2)
Figure 3B
Landfill Gas Monitoring Features and Structures (2 of 2)
Figure 4
Potentiometric Surface Map (7 March 2022)
Figure 5
March 2022 2L Groundwater Exceedances
Figure 6
April 2022 North and Northeast Boundary Passive Landfill Gas
Monitoring Results
Figure 7
April 2022 Southern Boundaries Landfill Gas Monitoring Results
Figure 8
Clubhouse Venting System
Figure 9
April 2022 Landfill Gas Migration Control System Extraction Well
Monitoring Results
Figure 10
April 2022 Northeast Boundary Landfill Gas Migration Control System
Status
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Geosyntec Consultants of NC, P.C.
Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
LIST OF APPENDICES
Appendix A
Sampling Field Data Sheets
Appendix B
Laboratory Analytical Reports
Appendix C
Historical Groundwater & Surface Water Monitoring Data
Appendix D
Landfill Gas Monitoring Data (January through April 2022)
Appendix E
Historical Landfill Gas Monitoring Data
GC5699G/CAR220074 iv 05.2022

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consultants
Geosyntec Consultants of NC, P.C.
Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
1. INTRODUCTION
On behalf of the City of Charlotte, Geosyntec Consultants of NC, P.C. (Geosyntec) has
prepared this Semi -Annual Monitoring Report, First Half 2022 for the City of Charlotte's
former York Road Landfill. This report presents the results through April 2022 of
groundwater, surface water, and methane monitoring conducted at the former landfill
since the previous Semi -Annual Monitoring Report (Geosyntec, 2021) was submitted in
November 2021.
1.1 Site Description and History
The former York Road Landfill (herein referred to as the "Site") is an approximately 400-
acre site located along West Tyvola Road and South Tryon Street (Highway 49) in
Charlotte, Mecklenburg County, North Carolina (Figure 1). The Site was operated as an
unlined municipal solid waste landfill from 1968 to 1986, with the last expansion
occurring in 1983 (under North Carolina Department of Environmental Quality
[NCDEQ] Facility Permit Number 60-03). The landfill waste placement area consisted
of a total of approximately 168 acres, which was divided into six cells referred to as
Landfill Areas A through F, as shown in Figure 2. The precise locations of waste
placement boundaries are uncertain and have been estimated based on historical drawings
by others and electromagnetic mapping. The former landfill was developed with the
construction of West Tyvola Road, a golf course, and a recreational park following
closure in 1986. Today, the Site is utilized by the Harry L. Jones, Sr. Golf Course
(formerly Renaissance Park Golf Course) and Renaissance Park, which includes
recreational facilities for softball, volleyball, skateboarding, walking, hiking, biking, dog
exercise, and disc golf.
In July 2016, the soccer and softball athletic fields at Renaissance Park were closed to the
public to alleviate continuous field maintenance efforts and potential safety issues caused
by effects of the former landfill. Select facilities associated with the softball and soccer
fields located on waste have been demolished in order to alleviate maintenance issues and
risks associated with the landfill (e.g., methane accumulation). Demolition activities
were completed by May 2019 and portions of the park where demolition occurred have
since been utilized as passive park spaces (e.g. open fields and a dog park) as well as
volleyball courts. Two of the softball fields located outside of the expected waste
boundary re -opened in 2020. Volleyball courts were constructed within a portion of a
former baseball field located outside of the of the expected waste boundary in the fall of
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Geosyntec Consultants of NC, P.C.
Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
2020 and a dog park was constructed over former waste in summer 2020. A skateboard
park was constructed outside of the anticipated waste boundary and was opened during
the first half of 2021. Other Site facilities outside of the demolition area including the
golf course, bike trails, and disc golf courses remain in operation.
In May 2020, a shallow channel was constructed between a former soccer field and
baseball field to improve surface water drainage conditions within a passive park space.
Three storm drains where landfill gas measurements have historically been collected were
covered during the channel construction effort (SD-14, SD-15, and SD-16) and two other
storm drains (SD-21 and SD-22) were covered during an additional grading effort
completed in the vicinity of the concession stand in the spring of 2020 by Mecklenburg
County Parks and Recreation. An additional storm drain located within the dog park (SD-
23) was covered beneath synthetic turf matting in 2021 and was subsequently buried
beneath gravel fill material between January and April 2022. One storm drain (SD -A)
was uncovered and added to the routine monitoring schedule following the removal of a
structure adjacent to a former soccer field in 2019. Storm drains SD-16 and SD-14 have
since been partially exposed by erosion and were monitored for landfill gas during the
July and October 2021 landfill gas monitoring efforts, respectively. Although storm drain
SD-14 was observed in fall 2021, this monitoring location could not be found in January
or April 2022 and is suspected to have since been covered by collapsed soil and
vegetation. The landfill gas sampling schedule (Table 1) has been altered to reflect these
changes.
1.2 Hydrozeoloiic Setting
The Site is located within the Charlotte Belt of the Piedmont Physiographic Province.
The topography of the Piedmont Province is generally characterized by gently rolling
hills ranging in elevation from approximately 300 to 1,200 feet (ft) above mean sea level
(MSL), and the Site elevation ranges from approximately 580 to 680 ft above MSL.
Geologically, the province is comprised primarily of crystalline metamorphic rocks
(schists and gneiss, and to a lesser extent, phyllite and slate) of Precambrian to Paleozoic
age. These units are often highly deformed with multiple fracture and foliation planes,
which promote anisotropic groundwater flow. The occurrence and movement of
groundwater at the Site is typical of the Piedmont formation, and generally occurs within
two hydrogeologic units. A shallow hydrogeologic unit typically occurs within the soils
and saprolite (weathered residuum which mantles bedrock). A deeper hydrogeologic unit
is generally associated with secondary porosity (fractures or open spaces) within the
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Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
crystalline bedrock. A transition zone of fractured bedrock occurs between saprolite and
bedrock and is generally referred to as partially weathered rock (PWR).
Groundwater flow in the shallow hydrogeologic unit is controlled by local topographic
features, where recharge occurs in upland areas and discharge occurs in drainage features
such as streams, rivers, or lakes. Recharge to the shallow hydrogeologic unit is primarily
the result of infiltrating precipitation. Groundwater flow in the deeper water -bearing zone
is controlled by the distribution and degree of interconnection of openings in the rock.
1.3 Regulatory Authority
The York Road Landfill was closed under the 10 North Carolina Administrative Code
(NCAC) 1 OG, Section .0500 rules as referenced in the 21 August 1987 closure letter from
the North Carolina Department of Human Resources, Division of Health Services. These
regulations were transferred and recodified into title 15A NCAC 13B Section .0500,
effective April 1990.
Water quality and landfill gas monitoring at the Former York Road Landfill is conducted
pursuant to the Water Quality and Landfill Gas Monitoring Plan ("Monitoring Plan";
Geosyntec, 2017), which was approved by the NCDEQ in a 7 March 2017 letter. The
Landfill Gas Sampling Schedule from this Monitoring Plan, presented in Table 1, has
been revised to remove demolished light poles and score boards as well as remaining
large light poles which are not located on waste, where methane has not been observed
historically. Table 1 was modified in May 2022 to remove storm drains which are no
longer exposed and accessible for sampling following construction activities. The
Groundwater and Surface Water Sampling Schedule from the Monitoring Plan, presented
in Table 2, is conducted semi-annually, typically in March and September.
As stated in the Monitoring Plan, the 15A NCAC 13B Section .0500 rules and closure
letter for the Site do not specify landfill gas monitoring requirements. Therefore, landfill
gas monitoring is regularly conducted in general accordance with the Monitoring Plan,
which was developed to provide reasonable protection to public health and the
environment. Landfill gas monitoring is conducted on a quarterly basis (typically in
January, April, July, and October).
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Geosyntec Consultants of NC, P.C.
Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
2. MONITORING ACTIVITIES AND FIELD METHODOLOGY
The following sections describe the field methodology for groundwater, surface water,
and methane monitoring conducted during the current reporting period.
2.1 Groundwater Monitoring
Groundwater monitoring was conducted pursuant to procedures in the Monitoring Plan.
The current monitoring network includes twenty-three (23) groundwater wells (21
monitoring wells and 2 water supply wells), with sixteen (16) groundwater wells included
in the sampling network pursuant to the Monitoring Plan (the remaining seven [7]
groundwater wells are used for water level measurements only). Wells are screened
across one or more of the three hydrogeologic units at the Site (saprolite, PWR, and
bedrock). Monitoring well construction details are listed in Table 3, and locations are
depicted in Figure 2. A schedule for sample collection and associated laboratory analyses
conducted for each well under the Monitoring Plan is listed in Table 2. Iron
and manganese are monitored in groundwater on an annual basis, typically in the
fall. While these analyses were not requested for the April 2022 data, the lab reported
iron and manganese concentrations, and therefore they are presented herein.
Groundwater sampling activities conducted during this reporting period were performed
from 7 March through 30 March 2022 by Hanley Environmental, PLLC (Hanley
Environmental) of Charlotte, NC. Groundwater level measurements from groundwater
wells that are part of the monitoring network were collected during a single day (on 7
March 2022) in order to evaluate the potentiometric surface and groundwater flow
direction at the time of measurement.
Sampling of the Site wells was performed with dual -membrane passive diffusion bags
(PDBs) capable of sampling for both volatile organic compound (VOC) and metals
analysis. PDB sampling was conducted in two mobilizations. During the first
mobilization to the Site on 7 March 2022, PDBs were deployed in each well at the
approximate midpoint of the screened interval, or the midpoint of the water column if the
screen was not fully submerged. Prior to deployment, each PDB was filled with
laboratory -grade deionized water. PDBs were hung using a decontaminated stainless -
steel weight and stainless -steel wire or disposable, inert cord. The PDBs were allowed
to equilibrate within the wells for at least 21 days, providing time for constituents within
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Former Pork Road Landfill, Charlotte, North Carolina
May 2022
the wells to diffuse across the PDB membranes, and to allow for vertical equilibration of
constituents within the PDBs.
During a second mobilization on 30 March 2022, the water level and PDB depths were
measured prior to sampling to confirm PDB placement. PDB samplers were recovered
by pulling them up with the wire or cord. The bags were then pierced with a disposable,
small -diameter discharge tube and water was transferred to the laboratory -provided
sample containers.
After sampling, groundwater parameters (temperature, pH, and specific conductance)
were measured with a daily -calibrated multimeter from remaining water in the PDBs, or
from bailed water if insufficient volume was available in the PDBs. Samples were
transported to the laboratory on ice, under chain -of -custody. Non -dedicated sampling
equipment was decontaminated in accordance with procedures described in the
Monitoring Plan. Field quality assurance/quality control (QA/QC) samples including a
field (rinsate) blank, a trip blank, and a field duplicate (from parent sample DDW-03)
were analyzed. Field data sheets for groundwater sampling efforts are included in
Appendix A.
2.2 Surface Water Monitoring
Surface water monitoring was conducted pursuant to procedures described in the
Monitoring Plan. The surface water monitoring system consists of six sample locations
(listed in Table 2 and depicted on Figure 2) on the three streams that cross the Site: Sugar
Creek (SC), and two unnamed tributaries referred to as the north tributary (NT), and the
south tributary (ST). Sample locations generally correspond to one upstream location
and one downstream location from each stream. Laboratory analyses conducted for each
surface water sample location are listed in Table 2.
Surface water monitoring during the current reporting period was conducted on 30 March
2022 by Hanley Environmental. Samples were collected from locations where flow was
occurring (where possible) and from locations away from the stream bank to minimize
disturbance to the stream bed. Samples were placed in laboratory -provided sample
containers and transported to the laboratory on ice, under chain -of -custody. Field
measurements of pH, specific conductance, and temperature were recorded for each
sample at the time of collection. Field data sheets for surface sampling efforts are
included in Appendix A.
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Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
2.3 Water Supply Wells
Pursuant to the sampling schedule in the Monitoring Plan (presented in Table 2), annual
sampling of water supply wells WSW-2 and WSW-3 was not carried out during the
March 2022 sampling effort. These wells are located adjacent to 6431 and 6505 South
Tryon Street, respectively. Sampling of these water supply wells is scheduled to be
conducted in September 2022, if possible. Notably, the sample access spigot for the
WSW-3 residence location was inoperable in September 2021 due to a removed pump in
the water supply well. Geosyntec was informed in November 2021 that the property
containing the WSW-2 and WSW-3 supply wells is currently vacant and was listed for
sale by the property owner in the fall 2021. These properties do not appear to have been
sold as of May 2022 based on information obtained from property ownership records
available online at the Mecklenburg County Polaris 3G webpage and other publicly
available online property listings. If the current or future property owner(s) elect to
discontinue use of and/or abandon the water supply wells, the sampling schedule may be
adjusted accordingly.
2.4 Methane Monitoring
2.4.1 Routine Methane Monitoring Activities
Methane monitoring was carried out pursuant to the Monitoring Plan. Methane
monitoring activities include quarterly measurement of landfill gas concentrations at
methane probes, active extraction systems, and other points where methane could
accumulate such as storm drains. Table 1 lists locations at which quarterly methane
monitoring is conducted. Passive structures and Site features that are part of the methane
monitoring program are depicted in Figures 3A and 3B. In addition to methane
monitoring, methane alarm systems and active extraction systems are periodically
inspected and maintained. Quarterly methane monitoring events during this reporting
period were carried out by Geosyntec from 10 through 12 January and 4 through 6 April
2022.
Annual inspection and maintenance of the three methane detection systems (located in
the golf course clubhouse, golf course maintenance building, and softball field concession
building) was conducted by Lefler Electronics, Inc. (LEI Systems) on 6 April 2022.
These systems consist of 36 Macurco GD-2A detectors connected to control panels and
audible alarms which notify authorities and occupants in the event of methane detection.
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Geosyntec Consultants of NC, P.C.
Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
Inspection forms are included in Appendix A. Additionally, stand-alone, plug-in First
Alert Model GCOICN methane detectors are located in the John Crosland School, the
maintenance building of Leatherman Golf (located across South Tryon Street from the
landfill), and Harry L. Jones Senior Golf Course chemical storage building. Operation of
these detectors was confirmed by visual inspection during quarterly monitoring events.
Operation of the two active extraction systems (clubhouse and northeast boundary landfill
gas migration control system) and the condition of the currently inactive extraction
system (northeast boundary trench system) were observed by Geosyntec during quarterly
monitoring events. Effluent methane concentrations, blower vacuum, air flow rates, and
blower operating hours were recorded.
Visual inspection of the landfill cap was conducted pursuant to the Monitoring Plan
during quarterly monitoring events in January and April 2022. The purpose of the visual
inspections is to identify areas of concern such as significant settlement, formation of
subsurface voids, locations of methane venting, odors, distressed vegetation, or exposed
waste.
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Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
3. MONITORING RESULTS
The following sections describe the results of groundwater, surface water, and methane
monitoring conducted during the current reporting period.
3.1 Groundwater
3.1.1 Potentiometric Surface Elevation and Groundwater Flow Direction
Static groundwater elevations measured on 7 March 2022 and historical groundwater
elevations are listed in Table 4. Figure 4 displays a potentiometric surface map and
inferred groundwater flow direction for the Site. Groundwater within the saprolite and
shallow bedrock aquifer generally flows toward the southwest, following the surface
topography toward Sugar Creek. The potentiometric gradient is approximately 0.013 ft/ft
across the Site. The flow direction observed on 7 March 2022 was generally consistent
with historical observations at the Site.
Water level measurements were observed within two feet of historical water level
averages at 18 well locations. Notably higher than average water levels were observed at
DMW-02, DMW-02A, and DMW-08 located along the South Tryon Street area. March
2022 water levels at these wells were several feet above historic averages and DMW-02A
was 31.17 feet above average. The average water table elevation at DMW-02A began to
rise in September 2018, likely as a result of the construction of a multi -family residential
complex approximately 400 ft south of this well. The complex includes a man-made
pond which may be locally raising the water table. Recent increases in water table
elevations at DMW-02 and DMW-08 may be a result of the proximity to the residential
complex.
3.1.2 Groundwater Analytical Results
A summary of detected constituents and field parameters (pH, specific conductance, and
temperature) from monitoring well samples collected during the March 2022
groundwater sampling event is included in Table 5 and laboratory analytical reports are
included in Appendix B.
Low levels of some VOCs and metals were detected in samples collected from Site
monitoring wells in March 2022. Select compounds were detected in several wells at
concentrations above the Title 15A NCAC, Subchapter 2L Standards (2L Standards).
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Semi -Annual Monitoring Report — First Half 2022
Former Pork Road Landfill, Charlotte, North Carolina
May 2022
One or more VOCs exceeded their 2L Standard in 7 of the 14 groundwater monitoring
wells sampled, and one or more metals were detected above their 2L Standards in 8 of
the 14 monitoring wells sampled for metals analyses. Figure 5 displays a map with
exceedances of the 2L Standards shown for each well. The March 2022 analytical results
reveal the following:
• 1, 1 -Dichloroethane (1,1-DCA) was detected above its 2L Standard of 6
micrograms per liter (µg/L) in three wells: DDW-01 at 8.0 µg/L, DDW-01A at
7.7 µg/L, and DDW-02 at 9.2 µg/L.
• 1,2-Dichloropropane was detected above its 2L Standard of 0.6 µg/L in four wells:
DDW-01 at 1.1 µg/L, DDW-01A at 1.3 µg/L, DDW-03 at 2.3 µg/L (1.7 µg/L in
the duplicate), and DMW-06 at 2.1 µg/L.
• 1,4-Dichlorobenzene was detected above its 2L Standard of 6 µg/L in one well:
DDW-03 and the corresponding duplicate sample at 7.2 µg/L and 6.6 µg/L,
respectively.
• Benzene was detected above its 2L Standard of 1 µg/L in one well: DDW-03A at
5.2 µg/L.
• Trichloroethene (TCE) was detected above its 2L Standard of 3 µg/L in four wells:
DDW-01 at 5.8 µg/L, DDW-01A at 7.4 µg/L, and DMW-06 at 3.7 µg/L.
• Tetrachloroethene (PCE) was detected above its 2L Standard of 0.7 µg/L in one
well: DDW-01 at 6.0 µg/L.
• Vinyl chloride was detected above its 2L Standard of 0.03 µg/L in three wells:
DDW-0IA at 2.4 µg/L, DDW-03 at 2.5 µg/L and 2.8 µg/L in the duplicate sample,
and DMW-06 at 3.5 µg/L.
• Barium was detected above its 2L Standard of 700 µg/L in one well: DMW-02A
at 1,120 µg/L.
• Cadmium was detected above its 2L Standard of 2 µg/L in one well: DMW-01 at
20.2 µg/L.
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• Iron was detected above its 2L Standard of 300 µg/L in six wells, DDW-01 at 456
µg/L, DMW-01 at 4,680 µg/L, DMW-02 at 2,910 µg/L, DMW-05 at 12,800 µg/L,
DMW-08 at 2,570 µg/L, and YRW-1OC at 105,000 µg/L.
• Manganese was detected above its 2L Standard of 50 µg/L in seven wells,
DDW-01 at 102 µg/L, DMW-01 at 804 µg/L, DMW-02 at 789 µg/L, DMW-05 at
2,530 µg/L, DMW-06 at 205 µg/L, DMW-08 at 53 µg/L, and YRW-10C at 1,600
µg/L.
Historic groundwater analytical data are included in Appendix C.
A statistical analysis of the monitoring well VOC data was performed to identify
groundwater quality trends. The Mann -Kendall non -parametric test was performed on
performance monitoring wells for each VOC with a concentration above the 2L Standard
in March 2022, and where less than half of data points in the data set were non -detect.
The Mann -Kendall test was utilized to evaluate whether the concentration of each VOC
exhibits a statistically significant increasing or decreasing trend at a given confidence
interval; for this evaluation, a confidence interval of 95% was applied. EarthScience
Information Systems' Esdat Version 5.1 software was used to perform the trend analysis.
United States Environmental Protection Agency (USEPA) guidance on statistical
analyses for groundwater data has indicated that a concentration value lower than any of
the detected measurements should be assigned when an analytical result is "non -detect"
(USEPA, 2009). Therefore, zero values were assigned to non -detects in this analysis.
Table 6 presents the results of the trend analysis for VOCs. This analysis was performed
on data collected since March 2008, which were readily available in the Site's database.
The results of the Mann -Kendall trend analysis are summarized as follows:
• Eight (8) decreasing VOC concentration trends are considered statistically
significant at 95% confidence: PCE at DDW-01; 1,1-DCA at DDW-02; 1,2-
dichloropropane, 1,4-dichlorobenze, and vinyl chloride at DDW-03; and 1,2-
dichloropropane, TCE, and vinyl chloride at DMW-06.
• Four (4) increasing VOC concentration trends are considered statistically
significant at 95% confidence: WE at DDW-01; and 1,1-DCA, TCE, and vinyl
chloride at DDW-OIA.
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• There was one (1) instance where a VOC concentration trend was found to have
no statistical significance at a 95% confidence interval for analyzed data: TCE at
DDW-O lA
Mann -Kendall trend analyses were conducted for six (6) VOC compounds across five (5)
of the Site well locations (DDW-01, DDW-OIA, DDW-02, DDW-03, and DMW-06).
Trend analyses were not conducted for compounds where concentrations were above the
2L Standard in March 2022 and more than half of data points in the historical data series
were non -detect: 1,2-dichloropropane at DDW-01 and DDW-OIA and benzene at DDW-
03A. These series were excluded from the analysis as the Mann -Kendall is not considered
appropriate in evaluating trends when more than half of data points are non -detect.
Decreasing concentration trends for all but six (6) of the VOCs analyzed provides
statistical evidence of the overall improvement to the groundwater quality for VOCs at
the Site as a result of natural attenuation processes.
Six (6) VOC compounds and five (5) metal compounds decreased to below the 2L
Standard at wells which had an exceedance in September 2021. Instances where VOCs
decreased below respective 2L Standards in March 2022 include: benzene at DDW-OIA
and DMW-02B, and DMW-01; vinyl chloride at DMW-01 and DMW-02B; and 1,2-
dichloropropane at DMW-01. Instances where detected metals decreased to below 2L
Standards in March 2022 include: cadmium at DMW-02, DMW-02A, and DMW-08; and
iron and manganese at DMW-A. Notably, cadmium was not detected at DMW-02 and
DMW-02A in March 2022 following anomalous first-time detections and exceedances at
these locations in September 2021. Vinyl chloride at DMW-02B was also not detected in
March 2022 following a similar first-time detection in September 2021. Vinyl chloride
as well as 1,2-dichloropropane have only been detected during the fall sampling events
at DMW-01 since September 2019. Iron was reported below the 2L Standard (300 µg/L)
at DMW-A (246 µg/L) for the first time since March 2008 and manganese was reported
at below the 2L Standard (50 µg/L) at this location (41 µg/L) for the first time since
March 2011 (other than low concentrations of both metals from a PDB in 2016).
Five (5) VOC compounds and no metal compounds increased above respective 2L
Standards since the September 2021 sampling event. The VOC compounds which
showed increases above respective 2L Standards compared to concentrations in
September 2021 included: 1,2-dichloropropane at DDW-01 and DDW-OIA; 1,1-DCA at
DDW-OIA; and 1,4-dichlorobenzene at DDW-03. Notably, these occurrences of 1,2-
dichloropropane (1.1 µg/L at DDW-01 and 1.3 µg/L at DDW-OIA) and 1,1-DCA (7.7
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µg/L at DDW-0IA) represent the highest observed concentrations of these compounds at
the respective sampling locations during the historical monitoring period. The exceedance
of 1,4-dichlorobenze at DDW-03 (7.2 µg/L) also represents the highest concentration
observed for this VOC at this location since April 2009. Other VOC concentrations which
increased above the 2L Standard in March 2022 were within historical ranges.
The historical presence of chlorinated daughter products of PCE (TCE, cis-1,2-DCE, and
vinyl chloride) in wells may indicate that some reductive dechlorination has occurred in
Site groundwater, which can occur naturally under favorable (generally anaerobic)
conditions. These biodegradation processes, in combination with other natural processes
including sorption, dilution, and chemical degradation, contribute to natural attenuation
of VOCs in groundwater and reductions in concentrations over time.
Field parameter measurements were generally consistent with historical ranges. pH
values were measured within a range of 5.6 to 9.0, with the exception of DMW-02A,
which had a pH value of 12.9. The pH at DMW-02A has typically been higher than
other wells, which is potentially attributable to cement grout used in well construction.
Specific conductance ranged from 73 to 1,550 micro Siemens per centimeter (µS/cm),
with the exception of DMW-02A (5,086 µS/cm) which has also exhibited high specific
conductance historically.
3.2 Surface Water
A summary of detected constituents and field parameters (pH, specific conductance, and
temperature) from samples collected during the March 2022 surface water sampling event
is included in Table 7, and laboratory analytical reports are included in Appendix B.
Surface water samples were collected from five locations (NT-1, SC-1, SC-2, ST-1, and
ST-3) in March 2022 (Figure 2). Barium was detected at all surface water sampling
locations during the current reporting period. Barium concentrations ranged from 23.3
µg/L (SC-1) to 75.4 µg/L (ST-1) and were below the Title 15A NCAC Subchapter 2B
Water Supply Standard (2B Standard) of 1,000 µg/L for barium. These concentrations
are consistent with historically reported barium concentrations at these locations in a
dataset extending back to March 2008. No VOCs and no other metals were detected in
surface water samples during the March 2022 sampling event.
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Field parameter results were generally consistent with historical ranges at each of the
surface water sampling locations. pH ranged from 6.8 (NT-2) to 8.8 (ST-3) and specific
conductance ranged from 155 µS/cm (NT-2) to 407 µS/cm (ST-1).
3.3 Methane
Results of methane monitoring at locations with detections above 0.1 % methane from
January 2021 through April 2022 are summarized in Table 8, and landfill gas monitoring
results from January through April 2022 at monitored locations are included in Appendix
D. Historical landfill gas data from January 2012 through April 2022 is included in
Appendix E. The following sections discuss these results.
3.3.1 Passive Methane Monitoring Points
Passive methane probe monitoring results from the most recent quarterly monitoring
event (April 2022) are displayed in Figure 6 (northeast and northern boundaries) and
Figure 7 (South Tryon Street and Sugar Creek boundaries). Methane concentrations at
select on -Site subsurface monitoring probes equaled or exceeded the LEL of 5% along
the northeast boundary, the northern boundary, the South Tryon Street boundary, and at
one off -Site monitoring probe at the Leatherman Golf maintenance shop (P-4) during the
January and April 2022 monitoring events.
Methane was not detected in probes along Sugar Creek on the western boundary. With
the exception of the Leatherman Golf maintenance shop probe (P-4), no LEL exceedances
were observed in off -Site probes during this reporting period.
Historically, LEL exceedances have been observed in multiple off -Site probes located
across South Tryon Street (P-1 through P-4) since 2011. Exceedances at P-4 have been
observed intermittently since October 2012, where higher concentrations have generally
been observed during the fall and winter monitoring periods and lower concentrations
have typically been reported during the spring and summer monitoring periods.
Methane was detected above the LEL at two on -Site locations at the northern boundary,
probes 43 and 44, in April 2022. Methane was observed within historical concentrations
at probes 43 and 44 at 8.2% and 10.0%, respectively. The on -Site northern boundary
probes are located approximately 300 ft from the expected waste boundary and methane
concentrations tend to fluctuate between approximately 35% and 0%. Possible causes of
methane in the northern boundary probes could include: i) an isolated area of waste in the
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vicinity of the probes; ii) a migration pathway through the subsurface; iii) migration
through a preferential conduit (e.g., storm drain). These probes are located approximately
450 ft from the northern property boundary. In addition, the north tributary likely serves
as a hydraulic barrier for landfill gas as the water table elevation near this waterway has
been measured between 0.5 ft and 2.5 ft below ground surface.
Occasional elevated concentrations of methane at select off -Site probes near the northeast
boundary prior to 2019 indicated off -Site migration of methane above the LEL may have
occurred historically in the subsurface. A supplemental landfill gas migration control
system was constructed along the northeast boundary and began operating in September
2017. The older trench collection system and the supplemental landfill gas collection
system operated simultaneously for approximately two years. In order to evaluate the
effectiveness of the supplemental well -point landfill gas migration control system as a
stand-alone mitigation measure, the older trench system at the northeast boundary was
shut off on 2 October 2019. No off -Site methane detections were observed above 0.2%
near the northeast boundary for one year following trench system shut off other than
during a period of frequent unauthorized well -point system shut -downs. Methane has not
been detected in off -Site probes near the northeast boundary since April 2021 when these
shut -downs ceased. This suggests the well -point landfill gas migration control system
has worked effectively without the trench system.
Table 9 presents landfill gas concentrations and vacuum measurements from select
probes near the northeast boundary during the reporting period. Probe pairs VMP-06,
VMP-07, and VMP-08 (shallow and deep) can be used to interpret vacuum influence at
different locations along a common cross section between the Landfill Area D and off -
Site probe S-7, where methane has occasionally been detected. Methane has not recently
been detected above 0.1 % in passive off -Site probes near the S-7 transect but was detected
at 10.3% in S-7 in January 2021. This concentration decreased to 1.1% in February 2021
and has been measured at 0.0% during subsequent monitoring events since March 2021.
Methane was not detected above 25% of the LEL inside structures including buildings
and storm drains monitored during this period. As light poles and scoreboards have been
either demolished or removed from the monitoring plan, no LEL exceedances were
observed in the subsurface in the vicinity of light poles or scoreboards during this
reporting period.
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3.3.2 Active Extraction Systems
3.3.Z1 Golf Clubhouse System
The Harry L. Jones Sr. golf clubhouse venting system utilizes a five -horsepower Rotron
regenerative blower to extract methane from the clubhouse sub -slab gravel base using a
combination of 31 horizontal, open-ended, PVC pipes grouped together into seven
manifolds and eight vertical extraction points installed just below the building floor slab.
In addition, nine vertical passive air infiltration vents are situated at regular intervals
along the northern and southern sides of the clubhouse. These perforated pipes allow
atmospheric air to be pulled into the subsurface to minimize pulling additional methane
into the building from nearby landfill areas. The ability to pull in ambient air lessens the
magnitude of the vacuum being applied to the surrounding soils and adds clean dilution
air. The clubhouse venting system layout is shown in Figure 8.
The clubhouse active extraction system operated approximately 99.9% of the time since
the system was assessed between the October 2021 and January 2022 monitoring events
and it operated approximately 99.7% of the time between the January and May 2022
monitoring events. The clubhouse system was shut down on 4 May 2022 for
approximately two hours due to the system moisture separator and piping being
overloaded by water from heavy rainfall. Water was removed from the moisture separator
and system piping by Geosyntec on 4 May 2022. Enviro-Equipment replaced the drain
line between the moisture knockout tank and blower intake on 2 September 2021 to
improve drainage and deter related system shutdowns in during future heavy rainfall
events and the 4 May 2022 storm caused the only blower system overload occurrence
since the system drainage was improved. Geosyntec observed evidence of clogged and
overflowing gutters in the vicinity of select golf clubhouse probes (SCV-2, SCV-3, and
SCV-4) during the 4 May 2022 visit, which may have contributed to water encroachment
in the clubhouse system piping. The clubhouse staff confirmed that water has been
observed overtopping the gutters in this area and indicated that efforts to clear and
maintain the gutters are anticipated in the near future.
Methane was not detected above the LEL of 5% in any of the active clubhouse system
probes (SCV-1 through SCV-7) in January 2022 but an LEL exceedance was observed in
one probe in April 2022 (SCV-1 at 5.5%). Methane concentrations in April 2022 were
similar to those previously reported in March 2021, and highest methane concentrations
have generally been observed at the clubhouse probes during the spring monitoring events
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in recent years indicating potential seasonal influences on methane migration near these
probes.
3.3.Z2 Northeast Boundary Well -Point Landfill Gas Migration Control System
The northeast boundary landfill gas migration control system was designed to extract
from perimeter control (PC) wells screened at depths between the bottom of the trench
(approximately 17 ft bgs) and the water table (approximately 30 to 40 ft bgs).
The landfill gas migration control system consists of 26 active PC wells placed in a line
along the northeast boundary connected to a blower system through buried laterals and a
header pipe. The system began operation in September 2017.
The northeast boundary landfill gas migration control system utilizes a skid -mounted
Roots 59 positive displacement blower, operating with three phase 230/460 V power and
capable of a maximum of 15 inches of mercury vacuum. This blower removes methane
vapors from an approximately 1,000 ft transect with 26 PC wells, each installed to total
depths between 30 and 40 ft bgs.
The northeast boundary landfill gas migration control system was observed to be
operating during both the January and April 2022 landfill gas monitoring events and ran
approximately 99.8% of the time between these monitoring events based on readings
from the system's hour meter. A protective chain -link fence was installed around the
northeast boundary landfill gas migration control system blower shed and exterior
electrical panel in July 2021 following 16 instances of system shutdowns by unknown
parties between September 2020 and March 2021. No additional shutdowns from park
visitors were observed between July 2021 and May 2022.
Methane monitoring results from active and inactive systems on the northeast boundary
from the most recent monitoring event (April 2022) are displayed in Figure 9. This figure
shows that no methane detections were observed within the inactive trench system in
April 2022, while the well -point landfill gas migration control system was operational.
Figure 10 displays the applied well vacuum and flow at each well -point, along with the
methane and carbon dioxide concentrations observed on 4 April 2022. The sum of PC
well flow measurements indicates the total system air flow rate was approximately 569
standard cubic feet per minute (scfm) during the April 2022 monitoring event, and
wellhead vacuum levels ranged from approximately 42.7 inches of water (PC-23) to 46.0
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inches of water (PC-03, PC-04, and PC-05) at active wells. Flow measurements at PC-
18 (0.0 scfm) and PC-20 (7.8 scfm) in April 2022 were excluded due to presumed
erroneous flow values caused by turbid flow conditions. Methane concentrations in the
PC wells ranged from 0.0% (at several wells) to 15.8% (PC-1).
3.3.3 Methane Detection Systems
Methane detectors were confirmed to be active (by observation of a green status indicator
light) by Geosyntec during quarterly landfill gas monitoring events. The results of
inspection and maintenance of the three methane detection systems (golf course
clubhouse, golf course maintenance building, and softball field concession building)
conducted by LEI Systems (LEI) on 6 April 2022 showed that these systems were
functioning properly. The next annual inspection of these systems is scheduled for April
2023.
No alarms were reported from the plug-in methane detectors located within the
Leatherman maintenance building, golf course chemical storage building, and the John
Crosland School. No other methane alarms occurred at the golf course clubhouse, the
golf course maintenance shop, or the softball field concession stand during this reporting
period. The most recent alarm at the softball field concession stand occurred on 15
October 2021 and was triggered due to vandals damaging the methane sensors which
were repaired on 4 November 2021. Methane alarms have been triggered at the golf
course maintenance building in the past due to aerosols or volatile chemicals being used
within close proximity of methane sensors in the building, with the most recent aerosol
alarm having occurred on 18 September 2021.
Non -critical (non -methane) alarms were observed at methane detection systems in the
softball field concession stand, golf course clubhouse, and/or golf course maintenance
building during the monitoring period. These alarms were generally fire trouble or late -
to -test alarms, likely due to temporary system outages. Non -critical alarms were resolved
remotely when possible.
3.3.4 Landfill Cap Inspection and Repairs
Visual inspections of the landfill cap were completed by Geosyntec during quarterly
monitoring in January and April 2022. Since the demolition of the light poles and
scoreboards in November 2018, the landfill cap was observed to be generally intact. No
methane was detected above the LEL in subsurface cracks or voids during the January
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and April 2022 monitoring event inspections. An orange substance (suspected to be a
fungus) was observed protruding from a mound at the golf course adjacent to the
pavement near Hole 7 in July 2021 but had reduced in size by October 2021. Continued
observation of the orange substance in January and April 2022 indicated that it remained
present. No associated odor or methane was observed in the vicinity during either of
these monitoring events.
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4. SUMMARY, CONCLUSIONS, AND RECOMMENDATIONS
The following sections summarize findings conclusions, and future recommendations
based on data collected during this reporting period, and historical data collected at the
Site.
4.1 Groundwater
• Water level measurements were within approximately 2 ft of historical water level
averages at respective well locations in March 2022 with the exception of DMW-
02, DMW-02A, and DMW-08 which have been influenced by construction of a
man-made pond approximately 400 ft south of the DMW-02 well nest.
Groundwater flow at the Site was generally consistent with historical
observations, with a primary flow direction to the southwest toward Sugar Creek.
• Relatively low levels of VOCs were present in Site groundwater during
monitoring conducted in March 2022. One or more VOCs exceeded their 2L
Standard in 7 of the 14 monitoring wells sampled. VOCs exceeding the 2L
Standard in at least one Site well were 1,1-DCA, 1,2-dichloropropane, 1,4-
dichlorobenze, benzene, TCE, PCE, and vinyl chloride.
• A trend analysis of groundwater VOC data since 2008 indicated that decreasing
trends are present for 8 of 13 VOC constituent trends analyzed. These trends
provide evidence that natural attenuation processes are reducing groundwater
VOC concentrations at the Site.
• Instances where VOC concentrations increased to exceed the 2L Standard at well
locations in March 2022 compared to September 2021 included: 1,2-
dichloropropane at DDW-01 and DDW-01A; 1,1-DCA at DDW-01A; and 1,4-
dichlorobenzene at DDW-03. Notably, historical highest concentrations were
observed for 1,2-dichloropropane at DDW-01 (1.1 µg/L) and at DDW-01A (1.3
µg/L), for 1,1-DCA at DDW-01A (7.7 µg/L), and for 1,4-dichlorobenze at DDW-
03 since April 2008 (7.2 µg/L) during the March 2022 monitoring event.
• Low levels of metals were present in Site groundwater during monitoring
conducted in March 2022. One or more metals were detected above their 2L
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Standard in 8 of the 14 monitoring wells sampled. Metals exceeding the 2L
Standard in at least one Site well included barium, cadmium, iron, and manganese.
• No metals increased in concentration to above the 2L Standard since the
September 2021 sampling event. Notably, cadmium was not detected at DMW-
02 and DMW-02A in March 2022 following anomalous first-time detections and
exceedances at these locations in September 2021. Iron was reported below the
2L Standard (300 µg/L) at DMW-A (246 µg/L) for the first time since March
2008 and manganese was reported at below the 2L Standard (50 µg/L) at this
location (41 µg/L) for the first time since March 2011 (other than low
concentrations of both metals from a PDB in 2016).
4.2 Surface Water
• Barium was detected at the six sampled surface water locations at concentrations
below the 2B Standard. No VOCs were detected in surface water samples
collected in March 2022.
4.3 Methane
• One methane concentration in an off -Site subsurface monitoring probe near the
South Tryon Street boundary (P-4) exceeded the LEL during the routine
monitoring events in January and April 2022. Exceedances at this probe, which is
located at the Leatherman Golf maintenance shop, have been observed
intermittently since October 2012, where higher concentrations have generally
been observed during the fall and winter monitoring periods and lower
concentrations have typically been noted during the spring and summer
monitoring periods. The January 2022 methane exceedance (22.4%) was similar
to the October 2021 concentration (23.6%) and the April 2022 exceedance
(15.6%) was similar to prior concentrations reported at P-4 historically.
• No methane concentration LEL exceedances occurred at off -Site monitoring
probes near the northeast boundary in January or April 2022. Exceedances were
last observed at select probes outside the John Crosland School in April 2021 (BP-
6 and S-5), likely due to intermittent shutdowns of the landfill gas migration
control system during that period, but no methane was observed in these probes
by May 2021.
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• Methane was not detected above 25% of the LEL in monitored structures during
the reporting period. Methane was not detected above the LEL in the subsurface
in cracks and/or voids.
• Methane concentrations at select subsurface monitoring probes exceeded the LEL
at on -Site locations along the South Tryon Street boundary, the northern
boundary, the northeast boundary, and at one probe outside of the golf clubhouse
(SCV-1). Methane was not detected in probes along Sugar Creek.
• The trench system blower at the northeast boundary remained shut off during the
reporting period. The trench system was shut off in October 2019 to assess the
potential for landfill gas mitigation without the operation of the trench blower
system (while the wellpoint landfill gas migration system continued to operate).
The trench system blower remains off as of May 2022 because continued
monitoring suggests that methane gas migration is successfully controlled without
the operation of the trench collection system.
• No methane alarms occurred during this reporting period.
• The methane mitigation system at the golf course clubhouse shutdown for
approximately two hours on 4 May 2022 due to overload conditions from
rainwater in the system piping. The system was restored to operation the same
day.
• Non -critical (non -methane) alarms were observed at methane detection systems
in the softball field concession stand, golf course clubhouse, and/or golf course
maintenance building during the monitoring period. These alarms were generally
fire trouble or late -to -test alarms, likely due to temporary system outages.
4.4 Additional Activities
The following additional activities took place during this reporting period:
• Routine maintenance at the northeast boundary blower system and clubhouse
blower system, including oil changes.
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4.5 Future Work
• Continued landfill gas monitoring and groundwater/surface water monitoring as
described in the monitoring plan. The next anticipated quarterly landfill gas
monitoring event will occur in July 2022 and the next groundwater and surface
water monitoring event will occur in September 2022.
• Off -Site LFG monitoring location P-4, located across South Tryon Street from the
Site, will continue to be monitored following the LEL exceedances observed since
July 2020.
• Geosyntec was informed in November 2021 that the property containing the
WSW-2 and WSW-3 supply wells is currently vacant and for sale by the property
owner. Based on available public information, the property does not appear to
have been sold as of May 2022. If the current or future property owner(s) elect to
discontinue use of and/or abandon the water supply wells, Geosyntec may
recommend that these wells be removed from the sampling program.
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5. REFERENCES
Geosyntec, 2017, Water Quality and Landfill Gas Monitoring Plan, Former York Road
Landfill NCDEQ Permit No. 60-03.
Geosyntec, 2021, Semi -Annual Monitoring Report, Second Half 2021, Former York Road
Landfill, NCDENR Permit No. 60-03.
USEPA, 2009, Statistical Analysis of Groundwater Monitoring Data at RCRA
Facilities, Unified Guidance.
GC5699G/CAR220074 23 05.2022

TABLES

Table 1
NE Boundary
Passive
MP-14
Q
MP-15
Q
MP-16
Q
MP-20
Q
MP-31
Q
MP-32
Q
EW-1
Q
EW-2
Q
EW-3
NE Boundary Inactive
Trench System
NE System
Q
SU-01
Q
SU-02
Q
SU-03R
Q
SU-05
Q
SU-06
Q
SU-07
Q
SU-08
Q
SU-09
Q
SU-10
Q
SU-11
NE Boundary LFG
Migration Control
System
Blower
Q
PC-01
Q
PC-02
Q
PC-03
Q
PC-04
Q
PC-05
Q
PC-06
Q
PC-07
Q
PC-08
Q
PC-09
Q
PC-10
Q
PC-11
Q
PC-12
Q
PC-13
Q
PC-14
Q
PC-15
Q
PC-16
Q
PC-17
Q
PC-18
Q
PC-19
Q
PC-20
Q
PC-21
Q
PC-22
Q
PC-23
Q
PC-24
Q
PC-25
Q
PC-26
Q
Landfill Gas Sampling Schedule
Former York Road Landfill
Charlotte, North Carolina
Baseball Field Light
Poles
BLP-01
Q
BLP-02
Q
BLP-03
Q
BLP-04
Q
BLP-05
Q
BLP-06
I Q
BLP-07
Q
BLP-08
Q
BLP-09
Q
BLP-10
Q
BLP-11
Q
BLP-12
A
BLP-13
A
BLP-14
A
BLP-15
A
BLP-16
A
BLP-17
A
BLP-18
A
BLP-19
A
BLP-20
A
BLP-21
Q
BLP-22
Q
BLP-23
Q
BLP-24
Q
BLP-25
Q
BLP-26
Q
BLP-27
Q
BLP-28
Q
BLP-29
Q
BLP-30
Soccer Light Poles
SLP-01
Q
SLP-02
Q
SLP-03
Q
SLP-04
Q
SLP-05
Q
SLP-06
Q
SLP-07
Q
SLP-08
Q
SLP-09
Q
SLP-10
Storm Drains
SD-01
Q
SD-02
Q
SD-03
Q
SD-04
Q
SD-05
Q
SD-06
Q
SD-07
Q
SD-08
Q
SD-09
Q
SD-10
Q
SD-11
Q
SD-12
Q
SD-13
Q
SD-14
Q
SD-15
Q
SD-16
Q
SD-17
Q
SD-18
Q
SD-19
Q
SD-20
Q
SD-21
Q
SD-22
Q
SD-23
Q
SD-24
Q
SD-25
Q
SD-26
Q
SD-27
Q
SD-28
Q
SD-29
Q
SD-30
Q
SD-31
Q
SD-32
Q
SD-33
Q
SD-34
Q
SD-35
Q
SD-36
Q
SD-37
Q
SD-38
Q
SD-39
Q
SD-40
Q
SD-41
Q
SD-42
Q
SD-43
Q
SD -A
Q
Maintenance Building
BP-9 Q
South Tryon Street
Corridor
02
Q
03
Q
04
Q
05
Q
06
Q
07
Q
10
Q
11
Q
21
Q
22
Q
23
Q
24
Q
25
Q
27
Q
28
Q
29
Q
30
Q
RW-B
Q
RW-C
Q
RW-D
Q
Baseball Field
Scoreboards
BSB-1
A
BSB-2
A
BSB-3
Q
BSB-4
Q
BSB-5
Tyvola Rd
Tunnel
NE Boundary Off -Site
BP-2
Q
BP-3
Q
BP-5
Q
BP-6
Q
BP-7
Q
BP-8
Q
S-1
Q
S-2
Q
S-3
Q
S-4
Q
S-5
Q
S-6
Q
S-7
Clubhouse Passive
CHFD-01
Q
CHFD-02
Q
CHFD-03
Q
CHFD-04
Q
CHFD-05
Clubhouse Active
CH System
Q
SCV-1
Q
SCV-2
Q
SCV-3
Q
SCV-4
Q
SCV-5
Q
SCV-6
Q
SCV-7
Leatherman Golf (Off -
Site)
LGFD-01
Q
LGFD-02
Q
P-1
Q
P-2
P-3
P-4
EU
Western Boundary
31
Q
DMW-05
Q
32
Q
33
Q
34
Q
35
Northern Boundary
40
Q
41
Q
42
Q
43
Q
44
Q
45
Q
46
Q
47
Notes:
A - Measure landfill gas annually
Q - Measure landfill gas quarterly
1. Monitoring points highlighted in orange were no longer included in routine monitoring following
demolition activities.
2. Monitoring points highlighted in green were added for routine monitoring following demolition or
construction activies.
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 2
Groundwater and Surface Water Sampling Schedule
Former York Road Landfill
Charlotte, North Carolina
Sample
Sample Type
VOCs
(EPA 8260)
RCRA
Metals
(EPA 6010 &
7470)(EPA
Total Iron &
Manganese
6010)
Field
parameters
Water
Level
Field Blank
Blank
S
S
A
Trip Blank
Blank
S
DDW-01
Ground Water
S
S
A
S
S
DDW-01A
Ground Water
S
S
S
S
DDW-02
Ground Water
S
S
S
S
DDW-03
Ground Water
S
S
S
S
DDW-03A
Ground Water
S
S
S
S
DDW-05
Ground Water
S
DDW-06
Ground Water
S
DMW-01
Ground Water
S
S
A
S
S
DMW-02
Ground Water
S
S
A
S
S
DMW-02A
Ground Water
S
S
S
S
DMW-02B
Ground Water
S
S
S
S
DMW-05
Ground Water
S
S
A
S
S
DMW-06
Ground Water
S
S
A
S
S
DMW-08
Ground Water
S
S
A
S
S
DMW-09
Ground Water
S
DMW-A
Ground Water
S
S
A
S
S
DMW-B
Ground Water
S
Duplicate
Ground Water
S
S
A
S
YRW-06A
Ground Water
S
YRW-07
Ground Water
S
YRW-10C
Ground Water
S
S
A
S
S
YRW-11B
Ground Water
S
NT-1
Surface Water
S
S
S
NT-2
Surface Water
S
S
S
SC-1
Surface Water
S
S
S
SC-2
Surface Water
S
S
S
ST-1
Surface Water
S
S
S
ST-3
Surface Water
S
S
S
WSW-2
Water Supply Well
A
A
WSW-3
Water Supply Well
A*
A*
Notes:
1. EPA - Environmental Protection Agency
2. RCRA - Resource Conservation and Recovery Act
3. VOCs - volatile organic compounds
4. S - Semi-annual frequency, A - Annual frequency (fall)
5. Field parameters include conductivity, pH, and temperature.
6. RCRA metals include arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver.
7. One trip blank should be included with every sample shipment.
8. * indicates that sample not collected due to inoperable well pump or spigot during most recent sampling event.
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 3
Groundwater Well Construction Details
Former York Road Landfill
Charlotte, North Carolina
Well ID
Well
Depth
(ft BTOC)
Lithology
TOC Elevation
(ft above
NGVD)
Ground
Elevation
above
N
NGVD)
Top of
Screened
Interval
(ft above
NGVD)
Bottom of
Screened
Interval
(ft above
NGVD)
Screened
Length
(ft)
DDW-01
60.0
Bedrock
585.49
583.25
538.25
523.25
15.0
DDW-OlA
100.0
Bedrock
585.06
583.30
493.30
483.30
10.0
DDW-02
55.0
PWR
587.96
585.53
545.53
530.53
15.0
DDW-03
61.0
PWR/Saprolite
585.59
582.69
537.69
522.69
15.0
DDW-03A
133.0
Bedrock
584.70
582.86
464.86
449.86
15.0
DDW-05
50.0
Bedrock
602.13
599.79
567.79
549.79
18.0
DDW-06
72.0
Bedrock/PWR
621.88
619.32
562.32
547.32
15.0
DMW-01
45.0
PWR
626.55
626.75
596.75
581.75
15.0
DMW-02
22.0
PWR/Saprolite
597.33
597.53
585.53
575.53
10.0
DMW-02A
47.0
Bedrock
595.51
593.54
558.54
546.54
12.0
DMW-02B
84.5
Bedrock
595.20
593.52
518.52
508.52
10.0
DMW-05
20.0
PWR/Saprolite
587.98
585.59
580.59
565.59
15.0
DMW-06
29.5
Saprolite
584.76
582.39
567.39
552.89
14.5
DMW-08
62.0
PWR
670.48
670.69
623.69
608.69
15.0
DMW-09
20.0
Saprolite
602.48
599.70
594.70
579.70
15.0
DMW-A
45.0
Saprolite
684.52
684.52
659.52
639.52
20.0
DMW-B
30.0
Saprolite
622.29
619.50
604.50
589.50
15.0
NEB-PZ-1
41.5
Saprolite
668.55
668.72
642.02
627.02
15.0
NEB-PZ-2
34.6
Saprolite
661.70
661.84
642.14
627.14
15.0
NEB-PZ-3
29.5
PWR
642.46
642.64
627.94
598.24
15.0
YRW-06A
27.9
Saprolite
587.63
585.11
567.11
557.11
10.0
YRW-07
23.1
Saprolite
624.80
622.93
604.93
599.93
5.0
YRW-08A
22.8
Saprolite
587.45
584.22
566.22
561.22
5.0
YRW-09A
26.5
Saprolite
586.11
582.86
560.86
555.86
5.0
YRW-IOC
16.5
Saprolite
1 589.37
582.39
570.39
1 565.39
1 5.0
YRW-11B
20.0
Saprolite
602.96
600.19
585.19
580.19
5.0
WSW-2
80.0
Details not known
WSW-3
100.0
Details not known
Notes:
1. PWR - Partially Weathered Rock; NGVD - National Geodetic Vertical Datum; BTOC - below top of casing
2. Well construction information derived from historical site -related monitoring reports prepared by HDR, with the
exception of NEB-PZ-1, -2, and -3. These piezometers were surveyed by GEL on 09 November 2015.
3. WSW-2 and WSW-3 well depths reported by well owner.
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 4
Historical Groundwater Elevations
Former York Road Landfill
Charlotte, North Carolina
Well ID
Mar-06
Se -06
Feb-07
Se -07
Mar-08
Se -08
Mar-09
Se -09
Mar-10
Se -10
Mar-11
Se -11
Mar-12
Se -12
Mar-13
Se -13
DDW-01
578.01
577.95
579.17
575.59
577.66
577.21
578.74
576.48
578.81
576.32
577.60
576.26
578.09
577.07
578.74
576.58
DDW-OlA
578.41
578.32
579.54
575.97
578.01
577.61
579.14
576.88
579.20
576.68
577.94
576.66
578.46
577.47
579.10
576.96
DDW-02
575.77
575.58
576.81
574.01
575.91
575.42
577.07
574.70
576.59
574.60
575.73
574.50
575.91
574.90
576.33
574.77
DDW-03
575.57
575.26
576.26
574.00
575.34
574.83
576.37
574.53
576.17
574.54
575.44
574.40
575.56
574.77
575.78
574.70
DDW-03A
580.34
579.70
581.05
578.75
579.95
579.32
580.87
579.42
581.70
579.66
580.03
579.39
580.57
580.04
580.86
580.20
DDW-05
597.88
597.25
598.39
595.84
597.68
596.59
598.15
596.10
597.83
594.73
597.60
595.25
597.24
596.28
597.83
595.95
DDW-06
592.35
591.77
592.89
591.44
591.38
591.70
591.77
592.07
593.45
591.84
591.29
590.71
591.43
590.74
591.07
591.04
DMW-01
592.25
591.30
594.27
590.91
590.81
590.42
591.14
591.00
595.44
592.05
590.52
590.29
590.92
590.36
590.38
590.95
DMW-02
585.14
584.15
584.84
583.33
584.19
583.43
585.04
583.87
585.48
583.87
584.05
583.29
584.41
584.11
584.69
584.17
DMW-02A
552.51
551.63
552.22
550.12
549.81
550.96
553.01
552.32
556.11
556.06
552.37
550.44
551.58
548.98
550.83
552.17
DMW-02B
590.03
589.85
590.89
589.50
592.95
589.30
590.23
589.54
590.64
589.28
589.72
589.10
589.63
589.28
589.77
589.52
DMW-05
575.87
575.63
578.24
573.50
576.78
574.96
578.94
574.08
577.49
573.95
576.10
574.17
576.50
574.67
577.48
574.39
DMW-06
574.94
574.59
575.55
573.44
574.76
574.23
575.76
573.96
575.47
573.97
574.88
573.83
574.87
574.13
575.09
574.07
DMW-08
614.08
615.03
614.28
613.76
612.36
611.35
610.82
610.85
611.32
612.09
611.13
610.65
610.59
610.80
610.69
610.86
DMW-09
597.82
597.40
598.55
596.04
597.96
596.78
598.25
596.27
597.97
594.95
597.85
595.45
597.47
596.49
598.02
596.17
DMW-A
645.90
645.70
646.32
645.56
644.15
643.77
643.60
670.98
644.95
644.94
643.19
642.92
642.97
642.68
642.32
643.31
DMW-B
592.51
591.90
593.05
591.61
591.46
591.11
591.79
592.29
593.60
592.09
591.41
590.85
591.56
590.84
591.15
591.23
YRW-06A
576.72
577.78
577.33
577.76
577.30
579.04
577.29
576.98
578.30
577.40
578.29
577.39
YRW-07
-
-
-
608.29
612.10
609.59
612.45
610.07
612.60
609.88
-
608.83
610.56
609.65
611.03
609.75
YRW-IOC
575.92
575.78
577.13
574.64
575.95
575.36
576.86
575.01
577.12
574.99
575.82
574.97
575.84
575.21
576.14
574.97
YRW-11B
-
-
595.71
597.99
598.09
598.36
598.36
1 598.12
594.66
-
595.52
1 597.29
596.28
598.08
596.02
Notes:
Groundwater elevations above are dispalyed in ft above National Geodetic Vertical Datum.
Data prior to 2015 were obtained from previous reports prepared by others.
Blank cells represent unavailable historical data or no reading taken.
Highest Period Reading
Lowest Period Reading
Bold values are suspected to be anomalous (Sep-09 at DMW-A)
CAR220074 Page 1 of 2 Geosyntec Consultants of NC, P.C.

Table 4
Historical Groundwater Elevations
Former York Road Landfill
Charlotte, North Carolina
Well ID
Mar-14
Se -14
Mar-15
Se -15
Mar-16
Se -16
Mar-17
Se -17
Mar-18
Se -18
Mar-19
Se -19
Mar-20
Se -20
Mar-21
Se -21
Mar-22
DDW-01
578.79
576.77
578.69
575.19
578.00
575.98
577.83
576.49
578.19
576.10
579.09
577.36
579.01
577.03
579.24
576.84
577.61
DDW-OIA
579.16
577.17
578.75
575.54
578.36
576.34
578.17
576.86
578.50
576.44
579.45
577.72
579.34
577.43
579.58
577.21
578.01
DDW-02
576.52
574.80
576.31
573.73
576.02
574.22
575.57
574.53
575.61
574.00
576.57
575.20
576.47
575.06
576.63
574.92
575.46
DDW-03
576.16
574.73
575.93
573.74
575.79
574.21
575.28
574.40
575.08
573.67
575.73
574.61
575.60
574.57
575.83
574.49
574.93
DDW-03A
581.53
579.91
580.91
578.71
581.79
579.51
580.67
580.18
580.73
578.87
582.92
579.65
582.92
581.25r
581.66
581.75
DDW-05
598.21
597.19
598.74
595.03
597.88
596.02
597.83
596.63
597.91
595.62
598.35
596.45
597.98
595.62
595.73
596.33
DDW-06
591.85
591.10
591.15
590.01
592.95
590.98
591.16
591.22
590.74
590.40
593.69
592.11
592.99
592.20
591.51
591.44
DMW-01
591.25
591.35
591.14
591.25
595.21
594.59
591.86
594.01
594.59
589.78
595.20
592.05
594.93
593.39
594.43
593.80
DMW-02
585.30
584.33
584.88
583.36
585.58
584.21
584.46
584.42
584.62
582.35
586.82
583.67
586.50
584.50
590.28
590.37
DMW-02A
555.06
553.39
552.75
550.79
555.26
550.74
554.04
556.90
563.63
570.98
593.07
594.07
594.41
594.27
594.09
593.79
593.34
DMW-02B
590.34
589.58
590.16
589.04
590.55
589.51
589.72
589.66
589.87
581.75
592.20
582.18
589.85
584.86
589.42
587.94
589.37
DMW-05
577.38
574.38
577.13
573.30
576.34
573.81
575.74
574.08
576.10
573.60
577.33
574.93
577.65
574.60
577.54
574.26
575.33
DMW-06
575.46
574.08
575.26
573.17
575.07
573.65
574.63
573.75
574.44
573.15
574.91
573.90
574.72
573.83
574.83
573.66
574.13
DMW-08
610.68
612.02
611.77
611.50
612.51
613.45
612.62
612.44
611.89
611.77
612.81
614.45
614.24
622.88
617.51
617.07
615.93
DMW-09
598.36
597.42
598.88
595.25
598.01
596.24
598.06
596.85
598.14
595.81
598.48
596.67
598.11
595.86
597.94
595.98
596.66
DMW-A
642.92
643.98
643.33
642.60
644.28
644.15
642.87
643.08
642.26
642.42
644.71
645.91
645.92
647.11
647.07
646.84
645.18
DMW-B
591.99
591.27
591.29
590.17
593.23
591.19
591.34
591.43
590.89
590.58
593.94
592.35
593.23
592.46
593.46
591.74
591.64
YRW-06A
578.89
577.44
578.54
576.35
578.67
576.96
577.90
577.28
577.81
576.51
579.16
577.49
578.86
577.64
579.41
577.86
578.28
YRW-07
612.17
610.61
611.67
608.72
612.61
610.13
610.82
610.22
610.90
609.22
614.06
611.65
613.69
611.64
613.84
612.42
611.11
YRW-IOC
1 576.31
1 575.02
1 576.16
1 574.33
575.61
574.53
575.46
574.74
575.46
574.51
576.49
575.08
576.53
574.91
576.44
574.72
575.07
YRW-11B
1 598.59
1 597.35
1 598.84
1 595.09
598.19
596.06
597.97
596.67
598.09
1 595.63
598.97
596.46
598.31
595.52
1 598.22
595.61
597.43
Notes:
Groundwater elevations above are dispalyed in ft above National Geodetic Vertical Datum.
Data prior to 2015 were obtained from previous reports prepared by others.
Blank cells represent unavailable historical data or no reading taken.
Highest Period Reading
Lowest Period Reading
Bold values are suspected to be anomalous (Sep-09 at DMW-A)
CAR220074 Page 2 of 2 Geosyntec Consultants of NC, P.C.

Table 5
March 2022 Detected Constituents in Groundwater
Former York Road Landfill
Charlotte, North Carolina
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n.�oaaa®��®®�aaaa�a®aaa
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a
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•
n.�m
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a
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Notes:
1. Only detected constituents above the EQL are shown.
2. Values exceeding the NC 21, standard an, displayed in bold and shaded gay.
3. Values an, not considered exceedances ifvalues are not above respective NC 2L Standards when rounded to the same
decimal precisions as the respective NC 2L Standards.
4. Blank table entries indicate that the constituent was either not sampled or not detected.
Ref to analytical reports for information on which analyses were performed.
5. GWP, NC 2L, and SW SL were obtained from NCDEQ Solid Waste Section on 4 May 2022.
(https.//deq.nc.gov/about/divisions/waste-management/program-guidance/solid-waste-smtionlmviro=mtal-monitoring).
Ml indicates the matrix spike recovery exceeded quality control limits
EQL - Estimated Quantitanon Limit
GWP - Groundwater Protection Limit
NC 21, - Title 15A of the North Carolina Administrative Code, Subchapter 21, Standards
SWSL - Solid Waste Section Limit for EQL
MCL - Maximum Contaminant Level (National Primary Drinking Water Regulations)
µg/L - Micrograms per liter
µS/cm - Microsiemens per centimeter
SU - Standard Units
°C - Degrees Celsius
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 6
Summary of Mann -Kendall Trend Analysis for VOCs
Former York Road Landfill
Charlotte, North Carolina
Well
Constituent
Mann -Kendall Trend
No. of Points
DDW-01
1, 1 -dichloroethane
No Trend
33
DDW-01
Tetrachloroethene
Down
33
DDW-01
Trichloroethene
Up
33
DDW-01A
1, 1 -dichloroethane
Up
29
DDW-01A
Trichloroethene
Up
29
DDW-01A
Vinyl chloride
Up
29
DDW-02
1, 1 -dichloroethane
Down
29
DDW-03
1,2-dichloropropane
Down
30
DDW-03
1,4-dichlorobenzene
Down
30
DDW-03
Vinyl chloride
Down
30
DMW-06
1,2-dichloropropane
Down
33
DMW-06
Trichloroethene
Down
33
DMW-06
Vinyl chloride
Down
33
No. Downward Trends:
8
No. Upward Trends:
4
No. No Trend:
1
Notes:
1. Trends are reported at 95% confidence interval.
2. Analysis was performed on volatile organic compound (VOC) constituents
with concentrations above the 2L Standard in March 2022.
3. Analysis included data collected since March 2008.
4. To avoid the effect of changing method detection limits, non -detects were
replaced by zero (USEPA Unified Guidance, March 2009).
5. Only datasets with greater than 50% detections were analyzed.
6. Trend analyses were implemented using the EarthScience Information
System Esdat Version 5.1.58.
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 7
March 2022 Detected Constituents in Surface Water
Former York Road Landfill
Charlotte, North Carolina
Location
NT-1
NT-2
SC-1
SC-2
ST-1
ST-3
Sample Date
3/30/2022
3/30/2022
3/30/2022
3/30/2022
3/30/2022
3/30/2022
Method
Constituent
Units
EQL
NC 2B
MCL
EPA 6010
Barium
µg/L
5
10008
2,000
43.2
42.7
23.3
26.0
75.4
37.1
Temp
°C
-
-
-
14.9
14.0
16.2
15.0
11.0
14.1
Field
pH (Field)
SU
-
-
-
7.03
6.81
7.48
8.09
7.27
8.77
Field Specific Conductance
1 µS/cm
I -
-
-
212
155
340
341
407
224
Notes:
1. Only detected constituents above the EQL are shown.
2. Values exceeding the NC 2B standard are displayed in bold and shaded gray.
3. Blank table entries indicate that the constituent was either not sampled or not detected. Refer to analytical reports for information on which analyses were performed.
4. NC 2B standards were obtained from NCDEQ Water Resoucres Planning Section(https://deq.nc.gov/nc-stdstable-09222017) on 4 May 2022.
EPA - United States Environmental Protection Agency
EQL - Estimated Quantitation Limit
MCL - Maximum Contaminant Level (National Primary Drinking Water Regulations)
NC 2B - Title 15A of the North Carolina Administrative Code, Subchapter 2B Standards
NCDEQ - North Carolina Department of Environmental Quality
a - Water supply standard
b - NC 2B standard for chronic exposure to freshwater aquatic life (updated on 1 November 2019) were obtained from the NCDEQ Water Resoucres Planning Section and are available online at:
https://deq.nc.gov/about/divisions/water-resources/planning/classification-standards/surface-water-standards.
µg/L - Micrograms per liter
µS/cm - Microsiemens per centimeter
SU - Standard Units
°C - Degrees Celsius
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 8
Recent Methane Detections at Select Locations
Former York Road Landfill
Charlotte, North Carolina
2021
2022
Jan
Feb
Mar
Apr
May
Jul
Oct
Jan
Apr
NE Boundary Passive
EW-2
EW-3
'
.'
�'
:' -
0.0%
:'
�:.
: 1'
:.'
2.2%
�'MP-20
0.0%
0.0%
MP-31
.�
0.0%
0.0%
TI ,�,MP-32
2.6%
0.0`%
0.6%
;1=
NE Boundary Active
NE Boundary Landfill Gas Migration Control
NESystem 2
2.2%
-
1.8%
-
1.1%
0.9%
1.1%
1.6%
PC-01
PC-02
' :'
0.0%
-
4.9%
1.2%
3.0%
1.2%
0.4%
0.0%
PC-03
1.7%
1.7%
-
0.8%
1.1%
0.2%
0.0%
PC-04
�'
-
2.0%
2.1%
3.4%
PC-05
0.0%
-
4.200
2.7%
1'
0.0%
PC-06
4.3%
-
•'
2.0%
2.5%
1.6%
0.0%
PC-07
11' ,
1
�'
0.0%
PC-08
0.3%
0.1%
0.24.2%%
0.8%
1.0%
0.0%
PC-09
3.0%
3.0%
1.7%
3.1%
2.3%
PC-10
3.0%
2.1%
2.4%
2.6%
2.4%
0.0%
PC-11
1.8%
1.7%
0.8%
1.1%
0.8%
0.1%
PC-12
2.2%
1.0%
1.2%
2.3%
2.0%
0.5%
PC-13
0.0%
0.0%
0.0%
0.8%
0.0%
0.0%
PC-14
PC-15
0.1%
0.0%
•'
RU.' ,
:'AV
4.6%
0.0%
0.0%
0.0%
PC-17
PC-18
1.6%
-
-
1.3%
-
0.6%
1.6%
2.7%
0.0%
PC-20
0.7%
-
-
0.2%
-
0.0%
0.0%
0.0%
0.0%
PC-21
0.4%
-
-
0.5%
-
0.5%
0.6%
0.3%
0.0%
PC-22
0.0%
-
-
0.0%
-
0.0%
0.6%
0.9%
0.0%
NE Boundary Offsite
BP-6
0.0%
0.0%
3.6% 1
0.0%
0.0%
0.0%
0.0%
0.0%
S-5
:'
3.2%
2.3%
0.0%
0.0%
0.0%
0.0%
0.0%
S-7
1
' i
1.1%
0.0% 0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
Northern Boundary
41
MWI
I
1 1.
-
0.3%
0.0%
0.0%
0.0%
42
1.2%
0.0%
0.0%
1.2%
43
-
:'
-
2.5%
0.0%
0.0%
44
0.0%
'' :'
0.0%
0.0%
0.0%
1 1'
Baseball Field Storm Drains
SD-20
0.0%
-
0.0%
-
0.3%
0.2%
0.0%
0.3%
SD-26
0.0%
-
0.0%
-
0.0%
0.2%
0.0%
0.0%
SD-29
0.0%
-
0.0%
-
0.2%
0.2%
0.0%
0.2%
SD-30
0.0%
-
0.0%
-
0.2%
0.0%
0.0%
0.0%
Baseball Fields Parking Lot
SD-03
0.0%
-
-
0.0%
-
0.3%
0.0%
0.0%
0.0%
SD-04
0.0%
-
-
0.0%
-
0.4%
0.0%
0.0%
0.0%
SD-05
0.0%
-
-
0.0%
-
0.1%
0.0%
0.0%
0.0%
SD-06
0.0%
-
-
0.0%
-
0.0%
0.0%
0.0%
0.0%
Soccer Field Storm Drains
SD-11
0.1% 0.0% - 0.0% 0.0%
0.3% 0.0%
Western Boundary
HWY 49 Boundary
5
0.0%
-
1.1%
-
0.0%
0.0%
0.0%
0.0%
6
0.0%
3.4%
0.0%
0.0%
0.0%
0.0%
10
11
21
22
23
1'
0.0%
:'
0.0%
4.4%
0.0%
0.0%
0.0%
0.6%
0.0%
24
1
0.4%
0.10%
2.40%
27
4
-
0.1%
0.0%
0.0%
0.0%
RW-B
0
' ''
-
0.0%
RW-C
-
1
-
1.6%
RW-D
0.0%
0.0%
-
0.0%
0.M
0.0%
Leatherman Golf (Offsite)
P-1
0.5%
-
0.0%
0.0%
0.00/o
0.0%
P-4
.'
- - :' --VIEW
TP-1
Clubhouse Active
3.7%
CH System
0.0%
0.0%
-
0.2%
0.0%
0.0%
0.5%
SCV-1
0.5%
-
1.7%
-
1.1%
0.2%
0.0%
SCV-3
0.0%
1.7%
0.1%
-
0.4%
0.0%
0.0%
1.3%
SCV-4
0.0%
-
0.6%
0.2%
-
0.4%
0.1%
0.1%
0.6%
SCV-5
0.3%
0.8%
0.3%
-
0.4%
0.2%
0.0%
0.6%
SCV-6
0.1%
-
1.0%
0.3%
-
0.6%
0.2%
0.1%
0.8%
Notes:
Locations are shown on the basis of methane measurements exceeding 0.1 % in 2021 through 2022.
Blank cells indicate unavailable historical data or no reading taken.
Detection below Lower Explosive Limit (LEL, < 5%)
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

Table 9
Landfill Gas and Vacuum Readings - Northeast Boundary
Former York Road Landfill
Charlotte, NC
mom
(iW")
-�11
N.-
1. —indicates mt measured.
2. in Hi0 indicates imhes of water.
3. Negative vacuum hWicates positive pressure.
CAR220074 Page 1 of 1 Geosyntec Consultants of NC, P.C.

FIGURES

2
N
L
s
c
a
0
Y
Q'
O
W
H
13
0
J
Q'
a
x
U
L�
0
U
/
U
/
L)
U
W
0
a
ONjt
v �<L
f� '1 LANDFILL AREA
LAN DFILL
19A ZEE 6 ) � \ ( 1980-1983
t 1
PROPERTY LINE'" .�,
60
�3.
CLUBHOUSE
E \ > RENAISSANCE �{ -
`{ \ r B i MAINTENANCE BUILDING . ��
LANDFILL AREA E A
l(t 1983-1984, C ' �-�t_
��'LANDFILL AREA B �� i •�' ,, �r �!
1974-1980 L�
LANDFILL AREA C�
1972-19763..-
�• LANDFILL AREA A
1968-1972
—
44/
ot � /- p o t
SCALE IN FEET
REFERENCES: SITE LOCATION MAP
1. PROPERTY LINES OBTAINED FROM MECKLENBURG FORMER YORK ROAD LANDFILL
COUNTY GIs. CHARLOTTE, NORTH CAROLINA
2. U.S.G.S. 7.5 MINUTE QUADRANGLE CHARLOTTE WEST, G20SyClteC
DATED 1993, PHOTOREVISED 1996.
consultants Figure:
3. APPROXIMATE WASTE BOUNDARY OBTAINED FROM EM G—n—C.—dwnl—f NC, P.C.
MAPPING PERFORMED BY GEO SOLUTIONS, LTD, 1
OBTAINED 23 OCT 2017 AND HISTORICAL DRAWINGS. CHARLOTTE, NC MAY 2022
Y

K:\_PROJECTS\C\CITY OF CHARLOTTEWORK ROAD LANDFILL\FIGURES\GC5699.04\2022-05 SPRING\GC5699F002.DWG (2 May 2022) mfabrizio

K:\_PROJECTS\C\CITY OF CHARLOTTE\YORK ROAD LANDFILL\FIGURES\GC5699.04\2022-05 SPRING\GC5699F003.DWG (12 May 2022) mfabrizio
TUNNEL
w
SD-31
i
SD-37
SD-33
REFERENCES
1.
AERIAL PHOTOGRAPHY OBTAINED FROM NC ONEMAP
LEGEND
GEOSPATIAL PORTAL WEB SITE, DATED 2019.
— — APPROXIMATE PROPERTY
2.
PROPERTY LINES OBTAINED FROM MECKLENBURG
COUNTY GIS.
BOUNDARY
3.
STREAM LOCATIONS FROM MECKLENBURG COUNTY
STREAM
GIS, NORTH CAROLINA OPEN MAPPING WEBSITE,
20141014, CREEKS AND STREAMS.
.=1 STORM DRAINS
MANHOLE
4.
LIGHT POLES, SCOREBOARDS, AND STORM DRAIN
LOCATIONS SD-10, SD-14, SD-15, SD-21, SD-22, AND
SD-23 WERE NO LONGER INCLUDED IN ROUTINE
MONITORING FOLLOWING DEMOLITION ACTIVITIES.
5.
STORM DRAIN LOCATION SD -A WAS ADDED TO
ROUTINE MONITORING FOLLOWING DEMOLITION
ACTIVITIES.
FIELD 2
FIELDS t`
(BASEBALL)
r.
SD-39
SD-32
RENAISSANCE
MAINTENANCE
BUILDING
O
fro
SD-38
I
LEATHERMAN
MAINTENANCE
BUILDING
0 500' 1000,
SCALE IN FEET
LANDFILL GAS
MONITORING FEATURES AND STRUCTURES
(1 of 2)
FORMER YORK ROAD LANDFILL
CHARLOTTE, NORTH CAROLINA
Geosynte&
consultants Figure
Geosyntec Consultants of NC, P.C. 3 A
CHARLOTTE, NC MAY 2022

K:\_PROJECTS\C\CITY OF CHARLOTTE\YORK ROAD LAN DFILL\FIGURES\GC5699.04\2022-05 SPRING\GC5699F003.DWG (12 May 2022) mfabrizio

K:\_PROJECTS\C\CITY OF CHARLOTTEWORK ROAD LANDFILL\FIGURES\GC5699.04\2022-05 SPRING\GC5699F004.DWG (2 May 2022) mfabrizio