3606_HardinUnitIIMSWLF_December2022GWMR_FID1830539_20240221

SECOND SEMI-ANNUAL 2022
APPENDIX I GROUNDWATER,FRENCH DRAIN, SURFACE WATER & LEACHATE MONITORING
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA

Prepared for:

Mr. Dan Ziehm, PE
Gaston County Public Works
P.O. Box 1578
Gastonia, North Carolina 28053

November 3, 2023

Prepared by:
____________________________
Ross Klingman, P.G.
Senior Geologist

SECOND SEMI-ANNUAL 2022
APPENDIX I GROUNDWATER,FRENCH DRAIN, SURFACE WATER & LEACHATE MONITORING
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA

TABLE OF CONTENTS

1.0 Introduction 1

2.0 Background Information 4

3.0 Groundwater, French Drain, Surface Water and Leachate Monitoring Activities 11

4.0 Site Hydrogeology 13

4.1 Shallow Groundwater Flow Direction and Rate 13

5.0 Groundwater, French Drain, Surface Water and Leachate Analytical Results 14

6.0 Statistical Groundwater Evaluation Activities 16

6.1 Statistical Groundwater Evaluation Methods 16
6.2 Statistical Groundwater Evaluation Results 17

7.0 Conclusions 18

8.0 Recommendations 20

9.0 References 21

LIST OF FIGURES

1. Site Location Map
2. Site Layout Map
3. Shallow Groundwater Flow Direction Map
4. Groundwater & Surface Water Analytical Results

SECOND SEMI-ANNUAL 2022
APPENDIX I GROUNDWATER,FRENCH DRAIN, SURFACE WATER & LEACHATE MONITORING
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA

TABLE OF CONTENTS (continued)

LIST OF TABLES

1. Groundwater Gauging Data
2. Field Parameter Data
3. Hydrogeologic Data
4. Appendix I Groundwater and French Drain Analytical Results
5. Appendix I Surface Water Analytical Results
6. Leachate Analytical Results
7. Historical Groundwater Analytical Results, MW-1
8. Historical Groundwater Analytical Results, MW-23
9. Historical Groundwater Analytical Results, MW-24
10. Historical Groundwater Analytical Results, MW-25
11. Historical Groundwater Analytical Results, MW-26
12. Historical Groundwater Analytical Results, MW-27
13. Historical Groundwater Analytical Results, MW-28
14. Historical Groundwater Analytical Results, MW-29
15. Historical Groundwater Analytical Results, MW-30
16. Historical Groundwater Analytical Results, MW-31
17. Statistical Evaluation of Historical Groundwater Monitoring Data

APPENDICES

A. NCSWS Memorandums – PFAS Monitoring – March 13, 2023 and July 17, 2023
B. Laboratory Data Sheets

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SECOND SEMI-ANNUAL 2022
APPENDIX I GROUNDWATER,FRENCH DRAIN, SURFACE WATER & LEACHATE MONITORING
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
1.0 INTRODUCTION

Buxton Environmental, Inc. (BEI) respectfully submits the methods and results of the second semi-annual 2022
Appendix I groundwater, French drain, surface water and leachate Detection Monitoring activities conducted at
the Gaston County Unit II Phase 1 & 2 Lined Municipal Solid Waste (MSW) Subtitle D Landfill - Hardin Site
(Permit No.: 3606) located at 3155 Philadelphia Church Road in Dallas, North Carolina. These activities were
conducted to monitor water quality and hydrogeologic characteristics at the site. A site location map and site
layout map are provided in Figures 1 and 2, respectively.

The groundwater monitoring activities were conducted in general accordance with current North Carolina
Department of Environmental Quality, Division of Waste Management-Solid Waste Section (NCSWS)
Detection Monitoring Program Rules for lined MSW landfills (15A NCAC 13B .1632 and .1633); the NCSWS
groundwater and surface water sampling guidelines dated April 2008; the NCSWS letter dated August 8, 2016
requesting Assessment Monitoring or an Alternate Source Demonstration be conducted for Appendix I
inorganic constituent (metals) exceedances above North Carolina Groundwater Protection Standards (NCGPSs)
for lined MSW landfills; the NCSWS letter dated September 9, 2016 concerning 14-day notification following a
groundwater constituent exceedance of NCGPSs for the first-time; a March 23, 2017 memorandum from the
NCSWS concerning routine up-keep and maintenance issues at monitoring wells; and a May 29, 2018
memorandum from the NCSWS requiring the analysis of 1,4-dioxane by EPA Method 8260 volatile organic
compounds (VOCs) or EPA Method 8270 (semi-VOCs) utilizing the select ion monitoring (SIM) procedure
after July 1, 2018, the discontinuation of Solid Waste Section Limits (SWSLs, minimum laboratory detection
limits) and opting for EPA approved analytical methods sufficiently sensitive to quantify the presence of
constituents at or below applicable standards. According to NCSWS rules dated April 1, 2011, the statistical
evaluation of historical groundwater data at municipal solid waste landfills is now optional and statistically
significant increases in target constituents no longer warrant assessment.

The NCGPSs are generally defined by the NCSWS as the most protective of the Federal Maximum
Contaminant Level for Drinking Water (MCL), the North Carolina 2L Groundwater Quality Standards (2L
NCGQSs), or NCGPSs established by the NCSWS (generally obtained from interim established 2L NCGQSs).
The NCGPS and 2L NCGQS for non-naturally occurring constituents with no established standard is the
practical quantitation limit (PQL). For naturally occurring constituents (i.e. metals), the NCGPS and the 2L
NCGQS are the naturally occurring background concentrations. For clarity purposes, the NCGPSs and 2L
NCGQSs are essentially synonymous with each other. According to the NCGPSs and 2L NCGQSs, non-
quantified J-flagged laboratory data (estimated qualified data) which are detected less than the quantifiable
PQL, limit of quantitation (LOQ) or reporting limit (RL) (all synonyms), and above the method detection limit
(MDL) (lowest non-quantified limits of the laboratory instrumentation) are not considered exceedances of
NCGPSs or 2L NCGQSs. The NCGPSs in this report have been updated to reflect current standards issued by
the NCSWS on April 11, 2022.

A drainage swale by-pass was constructed around the east and south sides of the Unit II Phase 1 & 2 lined
MSW landfill, in order to divert stormwater run-off gathered at the scale house and maintenance building area
from discharging into the drainage swale and passing through the Unit III lined MSW landfill area (Figure 2).
The drainage swale by-pass was completed for operation in December 2021. The Unit III landfill will be
constructed over the upper portion of the drainage swale and will occupy the space between the existing Unit I
Phase 1 & 2 lined MSW landfill to the west and the Unit II Phase 1 & 2 lined MSW landfill to the east. The
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drainage swale storm water by-pass in conjunction with the construction of the Unit III lined MSW landfill over
the drainage swale are expected to greatly improve surface water and groundwater quality at the site by limiting
surface water discharge and improving groundwater hydrogeologic conditions that are expected to limit
contaminants-of concern (CoC) plume migration (including reduced groundwater recharge and hydraulic
gradients, thereby, slowing the rate of plume transport) along this former drainage area conduit.

On October 26, 2022, Mr. Ervin Lane with the NCSWS approved our request to abandon the seven (7) monitor
wells located within the footprint of the Unit III lined MSW landfill expansion area (Unit I Phase 1 & 2 MSW
landfill wells MW-32, MW-33, MW-34 and MW-35 located on the west side of the drainage swale; and Unit II
Phase 1 & 2 landfill wells MW-28, MW-29 and MW-30 located on the east side of the drainage swale), in order
to commence with the construction of the Unit III French drain located along the upper portion of the on-site
drainage swale. A copy of the April 4, 2023 Monitor Well Abandonment by Over-Drilling Report for: MW-28,
MW-29, MW-30, MW-32, MW-33, MW-34 & MW-35 report was submitted to the NCSWS.

From January to May 2023, Shamrock completed clearing and preliminary grading of the Unit III lined MSW
landfill area; 2) demolition of the former upper lined landfill storm water pond (upper LLO-2); 3) construction
of the Unit III lined landfill French drain FD-III along the entire length of the main drainage swale; and 4)
construction of the new Unit III storm water basin (with was equipped with an overflow dam with boulder/rock
spill-way; drainage riser pipe and side effluent pipe equipped with a boulder/rock cascade flowing toward the
drainage swale; and surface water skimmer). Based on weekly observations by BEI during these construction
activities, the Unit III French drain was installed by excavating a trench in sections starting at the head-waters
along the entire length of the drainage swale down to just below the base elevation of the drainage swale and
along the center-line of the drainage swale, which was below the entire length of the to-be constructed Unit III
lined MSW landfill expansion and Unit III storm water pond, and day-lighted at the toe of the Unit III storm
water pond dam directly into the drainage swale. If rock outcrop obstructions were encountered during
excavation of the trench, the French drain trench was excavated around the edge of the rock feature maintaining
the correct drainage depth and slope. The French drain FD-III was constructed by installing: a layer of geo-
textile fabric at the base and along the length of the drainage swale excavation trench, perforated 8-inch
diameter HDPE pipe was coupled together in sections, the pipe was encapsulated by with a permeable gravel
pack, capped with geo-textile fabric, and finally backfilled to landfill base grade with clean fill dirt. The upper
French drain FD-1, which was installed along the upper side drainage feature beneath the Unit II Phase 2 lined
landfill, was extended and connected into French drain FD-III. Based on recent semi-annual groundwater
monitoring activities, effluent flow from FD-1 is estimated to be less than 0.5 gal/min. The lower French drain
FD-2, which was installed along the lower side drainage feature beneath the Unit II Phase 1 lined landfill, was
extended as a separate pipe beneath the Unit III storm water pond, which day-lighted at the toe of the Unit III
storm water pond dam directly into the drainage swale. Based on routine semi-annual groundwater monitoring
activities at the site, French drain FD-2 has been dry since 2014.

On March 13, 2023, the NCSWS issued a memorandum requiring per- and polyfluoroalkyl substances (PFAS)
analyses during groundwater, surface water and leachate monitoring conducted after July 1, 2023 at all landfills
regulated under 15A NCAC 13B Rules: 0601 and .0602 (all other landfills not regulated under .0531-0546 and
.1600 rules); .0544 and .0545 (C&D landfills); and .1623, and .1630 - .1637 (Subtitle D lined MSW landfills).
According to the memo, PFAS include a group of manufactured compounds used in aerospace, automotive,
textiles, electronics, food packaging, stain-repellent products, non-stick products and firefighting foams that do
not breakdown in the environment and bioaccumulate in humans and animals through soil and drinking water
and are linked to adverse health effects. On July 20, 2023, Mr. Perry Sugg (NCSWS - Environmental
Compliance Branch Head), clarified that PFAS monitoring was also required at old closed MSW landfills that
fall under old NCSWS Rule .0500 that defaults to North Carolina 2L groundwater monitoring rules. Water
samples should be analyzed by EPA (Draft) Method 1633 (PFAS) by a Department of Defense (DOD)
accredited laboratory. The March 13, 2023 memorandum from the NCSWS regarding PFAS monitoring
requirements is provided in Appendix A.
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On July 17, 2023, the NCSWS issued a memorandum clarifying PFAS monitoring requirements at solid waste
sanitary landfills. The letter addresses landfill types that should comply; monitoring frequency (minimum of
two (2) consecutive sample events, after which the data will be evaluated for future continued monitoring
requirements); sampling methodology (including sampling practices and precautions to avoid equipment cross-
contamination); analytical method and laboratories (EPA (Draft) Method 1633 for up to 40 PFAS compounds
by a DOD accredited laboratory); monitoring locations (groundwater wells, surface water locations, underdrains
(French drains) and leachate); and reporting (routine report preparation and submittal, along with electronic
deliverable data (EDD) requirements in the EQUIS format). The July 17, 2023 memorandum from the NCSWS
clarifying PFAS monitoring requirements is provided in Appendix A.

A summary of background information, and the methods, results, conclusions and recommendations of this
investigation are outlined below.
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2.0 BACKGROUND INFORMATION

The Gaston County Landfill - Hardin Site consists of approximately 426 acres and is located on the north
central side of Gaston County, approximately 1.5 miles south of the Lincoln County line (Figure 1). The
landfill site has been in operation since approximately 1985. The subject facility presently contains four landfill
areas, which include a closed construction and demolition (C&D) landfill; a closed unlined MSW landfill with
inactive C&D landfill on-top; an active MSW Subtitle D lined landfill (Unit I); and an additional active MSW
Subtitle D lined landfill (Unit II Phases 1 & 2) (subject landfill) (Figure 2). The Unit II Phase 2 lined MSW
landfill lateral expansion, which is located to the immediate north and adjoins the Unit II Phase 1 landfill,
received the Permit-to-Operate from the NCSWS on May 5, 2017. The combined Unit II Phase 1 and Phase 2
MSW landfills are monitored as a single landfill unit for required groundwater, surface water and leachate
quality monitoring purposes. In addition, planning and preparation for the new Unit III lined MSW Subtitle D
landfill expansion is underway, which will tie into the Unit I landfill to the west and the Unit II landfill to the
east, and span across the drainage swale.

The Unit II Phase 1 landfill is approximately 23.5 acres and is located on the southeast corner of the Gaston
County Landfill site. The initial portion of the Unit II Phase 1 landfill (Cells 1A and 1B) was constructed
during the fall of 2008 and began receiving waste during the summer of 2009. Cells 1C and 2A were
constructed during the spring of 2010 and began receiving waste in the summer of 2010. Cell 2B was
constructed in 2012 and began receiving waste in 2013. The final Cell 2C was constructed in 2014 and was
permitted to receive waste in January 2015. The Unit II Phase 1 lined landfill is equipped with an impermeable
geosynthetic under-liner and a leachate collection system. Up until mid-2013, leachate from the Unit II Phase 1
landfill was pumped to the leachate sump located adjacent to Unit I, then was either re-circulated over MSW at
the Unit I landfill; or was pumped to on-site aboveground storage tanks (ASTs), pretreated on-site and disposed
via truck hauling at the off-site City of Gastonia Long Creek Waste Water Treatment Plant. The leachate at
Unit II Phase 1 (along with leachate at Unit II Phase 2) is currently pumped into the new High Shoals
interconnect sewer line that flows to the off-site City of Gastonia Long Creek Waste Water Treatment Plant.

Background groundwater sampling activities were conducted at the Unit II Phase 1 lined landfill in general
accordance with the Proposed Water Quality Monitoring Plan outlined in the Design Hydrogeologic Report-
Revision 1, Proposed Lined Subtitle D Municipal Solid Waste Landfill, Unit II Phase I dated September 14,
2007, which was prepared by BEI. According to this report, a total of six shallow monitor wells (MW-1, MW-
23, MW-24, MW-25, MW-26 and MW-27) were required to monitor groundwater quality at the site. Monitor
well MW-1 is also used to monitor groundwater quality at the closed unlined landfill and Unit I lined landfill.
According to NCSWS rules, four independent groundwater sampling events are required at the monitor wells
prior to the issuance of the Permit-to-Operate. From October 30, 2008 through March 9, 2009, BEI conducted
monitor well installation, hydrogeologic parameter assessment and four Appendix I (VOCs and metals) baseline
groundwater monitoring events at the subject site. Groundwater samples collected at monitor wells MW-1,
MW-23, MW-24, MW-25, MW-26 and MW-27 indicated the presence of metals above NCGPSs. A statistical
groundwater evaluation indicated that monitor wells MW-23, MW-24 and MW-27 indicated the presence of
metals above background concentrations. The metal affected groundwater detected at the site appeared to be
the result of naturally occurring conditions. Sampling activities at the French drain location FD-2 and surface
water sample locations US-1 and DS-1 (located along the drainage ditch that intersects the water table on the
southwestern side of the site) began during the second semi-annual 2009 sampling event. No sampling was able
to be conducted at the original French drain location FD-1 during the sole operation of the Unit II Phase 1
landfill (has since been extended beneath Unit II Phase 2), due to dry conditions.

In 2003 and 2011, Gaston County purchased approximately 45 acres from the drainage ditch to the South Fork
Catawba River on the southwest side of the site. In April 2009, Gaston County purchased 34.16 acres on the
northeast side of the landfill. In September 2013, Gaston County purchased the McGee property (14.36 acres)
to the immediate northeast of the landfill. This additional property serves as excellent landfill buffer.
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Historical Appendix I groundwater samples collected at MW-1, MW-23, MW-24, MW-25, MW-26 and MW-
27 only indicated the presence of metals above NCGPSs, through the second semi-annual 2015 monitoring
event. According to current NCSWS rules, an Assessment Monitoring Program is required to be initiated if one
or more Appendix I constituent is detected above NCGPSs in monitor wells located at the relevant point of
compliance. Assessment Monitoring is not required if an alternate source demonstration can be made.
However, during the first semi-annual 2016 sampling event, groundwater sample MW-24 indicated the
presence of 1.5 ug/l vinyl chloride, which was above the NCGPS for the first-time. On June 13, 2016, BEI
contacted Mr. Ervin Lane with the NCSWS to discuss the detection of vinyl chloride above the NCGPS at
monitor well MW-24. During the conversation, Mr. Lane agreed that Appendix I Detection Monitoring could
continue to be conducted at the site, and that the vinyl chloride concentrations at monitor well MW-24 should
be monitored over time to determine if additional assessment is warranted. The groundwater sample collected
at MW-24 during the second semi-annual 2016 event indicated the presence of 2.4 ug/l vinyl chloride, which
was above the NCGPS for the second-time. Groundwater samples collected at monitor well have not indicated
the presence of vinyl chloride above the NCGPS since the second semi-annual 2016 event.

Numerous landfill gas extraction wells were installed at the Unit II Phase 1 lined landfill in late 2015 and early
2016. The extracted landfill gas is utilized to fuel an adjacent electricity generation plant located to the
northeast across Philadelphia Church Road.

The NCSWS requested in an August 8, 2016 letter that an Assessment Monitoring Program or an Alternate
Source Demonstration be established/conducted within 90 days (as stipulated in NCSWS Rule 15A NCAC 13B
.1633), due to the presence of Appendix I inorganic constituents exceedances (metals) above NCGPSs at the
Gaston County Unit II Phase 1 lined landfill. On October 27, 2016, BEI submitted an extension request to the
NCSWS to assess/evaluate Appendix I inorganic constituents (metals) at the site. The Assessment Monitoring
Program / Alternate Source Demonstration Investigation Report was proposed to be completed and submitted to
the NCSWS on or by December 29, 2017. The NCSWS approved the extension request in a November 8, 2016
letter. On January 4, 2018, BEI obtained approval from Mr. Lane with the NCSWS to have the Assessment
Monitoring Program / Alternate Source Demonstration Investigation Report completed by March 30, 2018. All
field data and efforts to reduce sampling related turbidity associated with this assessment have been
collected/completed (most of this information has been/will be submitted to the NCSWS in routine semi-annual
groundwater monitoring reports). The Assessment Monitoring or an Alternate Source Demonstration Report is
in the final stage of completion.

From September 16 through November 11, 2016, BEI conducted re-development activities at existing Unit II
Phase 1 monitor wells MW-1, MW-24, MW-25, MW-26 and MW-27, in order to attempt to reduce/limit
potential sampling related groundwater turbidity as part of the initial Appendix I inorganic constituent (metals)
assessment. The monitor well re-development activities were conducted by swashing/surging and pumping a
stainless-steel Proactive Mega-Typhoon pump (connected to a flow rate controller) across the screened portion
of the well until discharge water was relatively free of sediment. Low-purge groundwater sampling has been
conducted with a stainless-steel Proactive® Mega-Typhoon pump at the Unit II MSW landfill since the second-
semi-annual 2016 event (December 2016), in order to attempt to reduce/limit potential sampling related
groundwater turbidity. According the 2008 NCSWS groundwater and surface water sampling guidelines, the
exterior pump housing must be constructed of stainless-steel, and the interior pump and moving parts in contact
with water must be constructed of stainless-steel or Teflon. Groundwater sampling at the site was previously
(prior to December 2016) conducted with disposable Teflon bailers attached to new nylon rope. The effects of
re-development and altered sampling technique (from bailer to low-purge sampling) will be further
discussed/documented in the Appendix I inorganic constituent (metals) Assessment Monitoring Program /
Alternate Source Demonstration Investigation Report.

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A Design Hydrogeologic Report, Proposed Lined Subtitle D Municipal Solid Waste Landfill Expansion - Unit II
Phase 2, which was prepared by BEI on June 30, 2016, was submitted to the NCSWS by HDR. During these
activities, thirteen (13) shallow depth stand-alone soil borings/piezometers; two (2) nested shallow and
intermediate or deep depth soil boring/piezometer pairs; four (4) soil borings; and two (2) rock cores were
advanced to supplement historical on-site hydrogeologic information. The initial Water Quality Monitoring
Plan for Unit II Phase 2 (subsequently revised in an October 17, 2016 update plan) was also provided in the
Design Hydrogeologic Report.

The Design Hydrogeologic Report portion of the Permit-to-Construct Unit II Phase 2 was approved by the
NCSWS in a September 29, 2016 letter. The September 29, 2016 response letter requested that a Water Quality
Monitoring Plan (update) be prepared for the combined Unit II Phase 1 (existing) and Phase 2 (lateral
expansion) MSW landfill, since they will be monitored as a single landfill unit.

The Unit II Phase 2 lined landfill is 11.14 acres and is located to the immediate north and adjoins the Unit II
Phase 1 lined landfill. The Unit II Phase 2 landfill was constructed from the fall of 2016 through the spring of
2017 and is equipped with an impermeable geosynthetic under-liner and a leachate collection system.
Compliance monitor well MW-23, which was located in the footprint of Unit II Phase 2, was appropriately
abandoned prior to construction in October 2016. The leachate at Unit II Phase 2 is pumped into the High
Shoals interconnect sewer line that flows to the off-site City of Gastonia Long Creek Waste Water Treatment
Plant. The Permit-to-Operate the Unit II Phase 2 MSW landfill expansion was issued by the NCSWS on May
5, 2017 and the first waste was placed on May 16, 2017.

The October 17, 2016 Water Quality Monitoring Plan Update indicates that groundwater quality monitoring
will be conducted at a total of nine (9) compliance monitor wells, which will comprise the groundwater
monitoring system for the combined Unit II Phase 1 and Phase 2 lined MSW landfill (Figure 2). These monitor
wells include one (1) existing upgradient background compliance monitor well MW-1 (which is located
approximately 250 feet to the east and upgradient of the Unit II landfill along Philadelphia Church Road, and is
utilized as a background monitor well for other Gaston County Landfill units); four (4) existing
downgradient/sidegradient shallow groundwater compliance monitor wells including MW-24, MW-25, MW-26
and MW-27; and four (4) new downgradient/sidegradient shallow groundwater compliance monitor wells
including MW-28, MW-29, MW-30 and MW-31. Groundwater purging and sampling at the monitor wells
were to be conducted with low flow sampling techniques specified in the NCSWS Solid Waste Section
Guidelines for Groundwater, Soil and Surface Water Sampling dated April 2008. The Water Quality
Monitoring Plan Update indicates that French drain water sampling also be conducted at the effluent discharge
pipes for French drains FD-1 (extended beneath the new Unit II Phase 2 landfill) and FD-2 (Figure 2). A
minimum of four initial background groundwater monitoring events were to be conducted at existing
background monitor well MW-1 and the four new compliance wells MW-28, MW-29, MW-30 and MW-31, as
part of the Detection Monitoring Program. A minimum of one background sampling event was to be conducted
at French Drain FD-1 during the fourth background monitoring event. The four initial background monitoring
events were to be conducted during separate evenly spaced events following well installation and prior to
issuance of the Permit-to-Operate.

From February 6 through March 13, 2017, BEI conducted monitor well installation, hydrogeologic parameter
assessment, and the four initial background Appendix I groundwater monitoring events at the Unit II Phase 2
lined landfill expansion. New downgradient/sidegradient compliance monitor wells including MW-28, MW-29,
MW-30 and MW-31 were installed, and hydraulic conductivity estimates were determined. On February 8,
2017, February 16, 2017, February 24, 2017 and March 13, 2017 Buxton Environmental, Inc. conducted the
four initial background Appendix I groundwater monitoring events at monitor wells MW-1, MW-28, MW-29,
MW-30 and MW-31. The findings of this assessment are presented in the June 26, 2017 Monitor Well
Installation and Four Initial Background Monitoring Activities report prepared by BEI, which was submitted to
the NCSWS.
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From February 7 through 20, 2017, the monitor well heads at MW-26 and MW-27 were lowered by 15.5 and
15.25 vertical feet, respectively, due to soil borrow and re-grading activities to the immediate south of the Unit
II Phase 1 landfill. These activities were conducted with the oversight of Mr. Ross Klingman, P.G. with BEI.
The newly established well heads were completed at grade with a new concrete pad, steel stand-up cover, well
tag and lock by Innovative Environmental Technologies, Inc. The new vertical ground surface and top-of-
casing elevations were surveyed by Bateman Civil Survey Company.

From December 26 through 29, 2017 (initial unfiltered and filtered groundwater sampling), and on February 21,
2018 (verification groundwater sampling at MW-1), BEI conducted the second semi-annual 2017 Appendix I
groundwater, surface water, leachate and French drain monitoring event at the subject site. These activities are
presented in the Second Semi-Annual 2017, Appendix I Groundwater, Surface Water, Leachate & French Drain
Monitoring report dated February 26, 2018, which was submitted to the NCSWS. During these activities,
unfiltered groundwater samples were collected at the nine shallow monitor wells including MW-1, MW-24,
MW-25, MW-26, MW-27, MW-28, MW-29, MW-30 and MW-31 utilizing low-purge sampling methodology
with a stainless-steel Proactive® Mega-Typhoon pump, in order to attempt to reduce/limit potential sampling
related turbidity as part of the Assessment Monitoring / Alternate Source Demonstration investigation for the
metals exceedances, and in accordance with the October 17, 2016 Water Quality Monitoring Plan Update, Unit
II Phase 1 & 2 Lined Subtitle D MSW Landfill. In addition, duplicate filtered samples were collected with the
stainless-steel Proactive® Mega-Typhoon pump and a Proactive GoProTM 0.45 micron in-line filter at each
monitor well (MW-1-F, MW-24-F, MW-25-F, MW-26-F, MW-27-F, MW-28-F, MW-29-F, MW-30-F and
MW-31-F), in order to further reduce sample turbidity as part of the metals investigation. The unfiltered
groundwater samples were analyzed for Appendix I or II VOCs by EPA Method 8260B and Appendix I or II
metals by EPA Method 6020B. Filtered groundwater samples (MW-1-F, MW-24-F, MW-25-F, MW-26-F,
MW-27-F, MW-28-F, MW-29-F, MW-30-F and MW-31-F) were only analyzed for Appendix I metals. The
groundwater samples collected from December 26 through 29, 2017 at monitor wells MW-1, MW-24 (including
filtered sample MW-24-F), MW-27, MW-28, MW-30 and MW-31 indicated the presence Appendix I metals
above NCGPSs. Groundwater sample MW-1 indicated the presence of 39 ug/l chromium and 18B ug/l
vanadium (B-flag indicates that the constituent was also detected in the method blank). Groundwater sample
MW-1 also indicated the presence of 19 ug/l nickel, which was elevated above historical pre-pump data, but not
above the NCGPS of 100 ug/l. Groundwater sample MW-24 indicated the presence of 11 ug/l cobalt and 8.7
ug/l vanadium; and filtered groundwater sample MW-24-F indicated the presence of 10 ug/l cobalt.
Groundwater sample MW-27 indicated the presence of 19 ug/l vanadium. Groundwater sample MW-28
indicated the presence of 5.3 ug/l vanadium. Groundwater sample MW-30 indicated the presence of 13 ug/l
vanadium. Groundwater sample MW-31 indicated the presence of 8 ug/l vanadium (first-time exceedance of
NCGPS). Unfiltered groundwater samples collected at monitor wells MW-25, MW-26 and MW-29 did not
indicate Appendix I metals above NCGPSs; and filtered duplicate groundwater samples MW-1-F, MW-25-F,
MW-26-F, MW-27-F, MW-28-F, MW-29-F, MW-30-F and MW-31-F did not indicate Appendix I metals
above NCGPSs. On February 21, 2018, groundwater verification sampling was conducted at background
monitor well MW-1, due to elevated chromium and nickel concentrations observed in unfiltered groundwater
samples collected at MW-1, and other unfiltered and filtered groundwater samples at on-site wells (particularly
MW-3A located at the Unit I lined MSW landfill), which were collected with a stainless-steel Proactive®
Mega-Typhoon pump during the second semi-annual 2017 event (December 2017). Low-purge groundwater
sampling was been conducted with a stainless-steel Proactive® Mega-Typhoon pump at the Unit I and II MSW
landfills from the second-semi-annual 2016 event (December 2016) through the second semi-annual 2017 event
(December 2017), in order to attempt to reduce/limit potential sampling related groundwater turbidity.
According the 2008 NCSWS groundwater and surface water sampling guidelines, the exterior pump housing
must be constructed of stainless-steel, and the interior pump and moving parts in contact with water must be
constructed of stainless-steel or Teflon. Groundwater sampling at the site was previously (prior to December
2016) conducted with disposable Teflon bailers attached to new nylon rope. Elevated chromium and nickel
levels were observed at background monitor well MW-1 during the four baseline background sampling events
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for the new Unit II Phase 2 MSW landfill (February through March 2017, utilized stainless-steel Proactive®
Mega-Typhoon pump). Lower than normal water levels and/or slow groundwater recharge at MW-1 (and other
on-site wells) resulted in more turbid groundwater conditions than usual during the second semi-annual 2017
sampling event (December 2017). Enviro-Equipment, Inc. (where the pump was purchased) was contacted to
determine the material used for construction of the pump, and was indicated to be 303 grade stainless-steel,
based on their conversation with Proactive Environmental Products, LLC (Proactive). According to the Penn
Stainless Products, Inc. website, 303 stainless-steel contains 18% chromium and 8% nickel for their improved
machinability and non-corrosive properties. The verification groundwater samples MW-1-B (bailer) and MW-
1-P (bailer sample recycled through stainless-steel pump), which were collected on February 21, 2018 from
background monitor well MW-1, indicated the presence Appendix I metals above NCGPSs. Groundwater
sample MW-1-B (bailer) indicated the presence of 88 ug/l chromium, 27 ug/l cobalt, 34 ug/l lead, 0.66 ug/l
thallium and 97 ug/l vanadium. Groundwater sample MW-1-B also indicated the presence of 39 ug/l nickel,
which was elevated above historical pre-pump data, but not above the NCGPS of 100 ug/l. Groundwater
sample MW-1-P indicated the presence of 350 ug/l chromium (3.98 times MW-1-B), 32 ug/l cobalt, 190 ug/l
nickel (4.87 times MW-1-B), 31 ug/l lead, 0.61 ug/l thallium and 99 ug/l vanadium. Based on these findings,
turbid groundwater conditions; coupled with abrasion of the body or moving parts (i.e. impeller) of the 303
grade stainless-steel construction of the Proactive® Mega-Typhoon pump appear to have resulted in elevated
chromium and nickel contamination related to the use of the pump during sampling at MW-1. A review of
historical groundwater analytical results (prior to this second semi-annual 2017 event) for Unit II monitor wells
MW-1, MW-24, MW-25, MW-26, MW-27, MW-28, MW-29, MW-30 and MW-31 was conducted to determine
if any elevated concentrations of chromium or nickel had been detected during use of the stainless-steel
Proactive® Mega-Typhoon pump (use began in December 2016). During this review, elevated chromium
concentrations (above the NCGPS) and elevated nickel concentrations (above historical pre-pump data but not
above NCGPSs) were detected at monitor well MW-1 on February 24, 2017 and March 13, 2017. Elevated
chromium concentrations were detected above the NCGPS at monitor well MW-28 on February 16, 2017 and
July 2017. These elevated chromium and nickel concentrations could potentially be the result of contamination
caused by the use of the stainless-steel Proactive® Mega-Typhoon pump. No other obvious evidence of
potential pump related chromium or nickel contamination was observed at any of the remaining Unit II Phase 1
and 2 monitor wells from December 2016 (second semi-annual 2016) through July 2017 (first semi-annual
2017). Future groundwater sampling at the site was recommended to be conducted with non-metallic down-
hole sampling devices, in order to remove the potential for field introduced metals contamination.

In October 2018, Mr. Ross Klingman, P.G. with BEI conducted routine up-keep and maintenance at on-site
monitor wells, in order to comply with the March 23, 2017 memorandum from the NCSWS. During these
activities, repairs and up-keep were made at the following monitor wells: MW-1 (dirt and vegetation were
removed from the cracked original concrete pad, a new concrete veneer was installed over the original cracked
concrete pad, and a well construction tag was placed on the stand-up cover); MW-24 (dirt and vegetation were
removed from the concrete pad and a well construction tag was placed on the stand-up cover); MW-25 (a new
concrete pad was installed at grade around the stand-up cover); MW-26 (dirt and vegetation were removed from
the concrete pad); MW-27 (the well construction tag was glued to the stand-up cover); MW-28 (dirt and
vegetation were removed from the concrete pad); MW-29 (dirt and vegetation were removed from the concrete
pad); MW-30 (dirt and vegetation were removed from the concrete pad); and MW-31 (dirt and vegetation were
removed from the concrete pad). During the well maintenance activities, the latitude and longitude at each
groundwater monitor well were obtained with the “My GPS Coordinates” software, and well construction
information was obtained from the well tags, which are presented in Table 1.

The Monitored Natural Attenuation (MNA) Sampling Event (Annual 2019); & MNA Corrective Action
Evaluation Report (CAER) (Second 5-Year Report) report was prepared on February 14, 2020 by BEI for the
immediately adjacent C&D landfill over the closed unlined MSW landfill located immediately adjacent and
upgradient of the Unit I Phase 1 lined MSW landfill. The primary purpose of the CAER was to demonstrate the
effectiveness of MNA to remediate CoCs affected groundwater at the site. As part of the assessment, an
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evaluation of pertinent contaminants-of-concern (CoCs) related to the closed unlined MSW landfill was
conducted. Based on this evaluation, the following CoCs were identified: VOCs (benzene, 1,1-dichloroethane,
1,2-dichloroethane, cis-1,2-dichloroethene, methylene chloride, tetrachloroethene, trichloroethene, vinyl
chloride; new VOC 1,4-dioxane; and pesticides (aldrin and beta-BHC). Metal detections above NCGPSs were
also evaluated to determine if they should be considered CoCs. This evaluation utilized historical statistical
groundwater analyses conducted at downgradient compliance wells MW-2, MW-6, MW-7, MW-8, MW-9,
MW-10/10A, MW-19 and MW-21 during the first semi-annual 2019 monitor event at the closed unlined
landfill. Metals are naturally occurring in both soil and groundwater. Concentrations of these metals are
affected by turbidity, natural variability, geology, geographic location, hydrologic cycle (including acid rain);
and ever-changing landfill operations including landfill construction and infrastructure (roads, storm water
control systems, landfill slopes, vegetative cover; and subsurface landfill gas, leachate and sewer piping).
During landfill construction and normal operation (both inside and outside the waste boundary), native soil
horizons are disturbed and/or removed, which result in the soil and groundwater systems inability to naturally
buffer themselves through normal physical, chemical and biologic processes, often results in exacerbated
acidification (decreased pH) of the natural hydrogeologic system (especially in the naturally acidic soil of the
North Carolina Piedmont), resulting in the mobilization/desorption of metals from their natural state. In
addition, disturbance of the land during normal landfill operation results in turbid surface water run-off and
disturbance of the subsurface, resulting in turbidity (muddying) of the groundwater system. Identifying the
metals which were both detected: above NCGPSs at downgradient compliance wells and statistically above
background monitor well MW-1; were utilized to determine a list of metals that could potentially be associated
with a release from the closed unlined landfill. The only metals that were detected at statistically significant
concentrations above background levels at MW-1 and were also above NCGPSs at selected compliance wells
were barium, beryllium, cadmium, cobalt, lead and thallium. Background monitor well MW-1 has historically
indicated the presence of all of these metals at/or above NCGPSs, with the exception of barium. Each of these
metals are naturally occurring at background monitor well MW-1 at varying concentrations, and are often
associated with turbid compliance well samples at the site. Due to the complexity of potential source (within
landfill waste boundary) and non-point sources (all activities outside of the waste boundary), it is difficult to
positively determine if the metals exceedances encountered at compliance groundwater monitor well are
associated with a contaminant release from the closed unlined MSW landfill, or are due to Alternate Sources
including both natural and/or disturbed site conditions. Therefore, metals are recommended to continue to be
excluded from CoC list at the present time. These complex issues regarding naturally occurring metals will also
be addressed in the upcoming Alternate Source Demonstration assessment of Appendix I metals exceedances
above NCGPSs at the Unit II Phase 1 & 2 lined MSW landfill.

BEI recommended in the March 9, 2020 Second Semi-Annual 2019 Appendix I Groundwater, Surface Water,
Leachate & French Drain Monitoring report that the analysis of 1,4-dioxane (by EPA SIM) be discontinued
during routine monitoring at upgradient background monitor well MW-1; downgradient monitor wells MW-24,
MW-25, MW-26, MW-27, MW-28, MW-29, MW-30 and MW-31; and surface water samples US-1 and DS-1,
in accordance with the new NCSWS policy that allows 1,4-dioxane (SIM) to be eliminated/reduced from the
sampling protocol following two (2) consecutive events with below MDL results. Groundwater samples
collected at these wells have not indicated the presence of 1,4-dioxane (SIM or non-SIM) above the MDL
during all three (3) historical sampling events (second semi-annual 2018, first semi-annual 2019 and second
semi-annual 2019). However, these groundwater and surface water samples would continue to be analyzed for
1,4-dioxane (non-SIM) during the routine Appendix I VOC analysis (EPA Method 8260D; MDL = 13ug/l and
PQL = 50 ug/l), for continued monitoring purposes. French drain samples FD-1 and FD-2 will be analyzed for
1,4-dioxane (by EPA SIM) on a semi-annual basis until they have been analyzed for a minimum of two events
(have only been analyzed for 1,4-dioxane (SIM) one-time each due to periodic dry conditions). Leachate
samples LEACHATE-UNIT II PH 1 and LEACHATE-UNIT II PH 2 would continue to be analyzed for 1,4-
dioxane (by EPA SIM) on a semi-annual basis, in accordance with the NCSWS policy.

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BEI recommended in the September 21, 2020 First Semi-Annual 2020 Appendix I Groundwater, Surface Water,
Leachate & French Drain Monitoring report that the analysis of 1,4-dioxane (by EPA SIM) continue to be
discontinued during routine semi-annual monitoring at downgradient monitor wells MW-24, MW-25, MW-26,
MW-27, MW-28, MW-29, MW-30 and MW-31, in accordance with the new NCSWS policy regarding 1,4-
dioxane (SIM). In addition, the analysis of 1,4-dioxane (by EPA SIM) was recommended to be discontinued
during routine semi-annual monitoring at French drain locations FD-1 and FD-2, since 1,4-dioxane (SIM) has
not been detected above the MDL for two (2) consecutive events. However, these groundwater and French
drain samples will continue to be analyzed for 1,4-dioxane (non-SIM) as part of the standard Appendix I VOC
analysis for continued monitoring purposes. Leachate samples LEACHATE-UNIT II PH 1 and LEACHATE-
UNIT II PH 2 (as required by the NCSWS), monitor well MW-1 (for background monitoring purposes), and
surface water samples US-1 and DS-1 (to monitor 1,4-dioxane affected groundwater detected at several closed
unlined MSW landfill with C&D landfill on-top monitor wells) will continue to be analyzed for 1,4-dioxane (by
EPA SIM) on a semi-annual basis.

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3.0 GROUNDWATER, FRENCH DRAIN, SURFACE WATER AND LEACHATE
MONITORING ACTIVITIES

On December 29 and 30, 2022, BEI conducted the second semi-annual 2022 Appendix I groundwater, French
drain, surface water and leachate monitoring event at the subject site. Groundwater monitoring activities were
conducted at six (6) shallow monitor wells including MW-1, MW-24, MW-25, MW-26, MW-27 and MW-31.
Groundwater monitoring was not conducted at monitor wells MW-28, MW-29 and MW-30, since the NCSWS
approved them to be abandoned on October 26, 2022 prior to anticipated construction of the Unit III lined
MSW landfill expansion. Monitor well MW-1 is an upgradient background well, and the remaining wells are
side/downgradient compliance wells. French drain water sample FD-1 was collected from the effluent French
drain pipe located beneath the Unit II Phase 2 MSW landfill. No samples were collected from French drain FD-
2 located beneath the Unit II Phase 1 MSW landfill, due to dry conditions. Surface water monitoring was
conducted at two locations including US-1 and DS-1, which are located along a drainage ditch to the west of the
Unit II Phase 1 lined landfill. Leachate sample LEACHATE-UNIT II PH 1 was collected from the Unit II
Phase 1 MSW landfill leachate pump station; and leachate sample LEACHATE-UNIT II PH 2 was collected
from the leachate sump at the Unit II Phase 2 MSW landfill.

Prior to conducting groundwater sampling activities, water levels were obtained from on-site monitor wells to
the nearest 0.01 foot with a depth-to-water electrode. Groundwater gauging data for the lined Unit I landfill is
provided in Table 1.

Following the gauging activities, each monitor well was purged of three well bore volumes of water or until
dryness with a disposable Teflon bailer attached to new nylon rope. The groundwater samples were collected
with a disposable Teflon bailer attached to new nylon rope. Field parameters including pH, conductivity and
temperature were collected following purging at each well with a calibrated HANNA-GroLine meter and
turbidity was measured with an AMTAST-AMT27 meter. Field parameter data is provided in Table 2.

French drain sample FD-1 was grab sample collected from the Unit II Phase 1 landfill French drain effluent
pipe. Surface water samples US-1 and DS-1 were grab samples from the drainage ditch. Leachate sample
LEACHATE-UNIT II PH 1 was a grab sample collected from the associated leachate sump spigot, and
LEACHATE-UNIT II PH 2 was a grab sample collected with a Teflon bailer attached to new nylon rope from
the associated leachate sump. Field parameters including pH, conductivity and temperature were collected at
the surface water sampling locations, leachate sample locations and French drain with a calibrated HANNA-
GroLine meter. Field parameter data is provided in Table 2.

The groundwater, French drain, surface water and leachate samples were analyzed for Appendix I VOCs by
EPA Method 8260D (plus 1,4-dioxane (non-SIM)) and Appendix I metals by EPA Method 6020B. The
groundwater sample collected at background monitor well MW-1, surface water samples US-1 and DS-1, and
LEACHATE-UNIT II PH 1 and LEACHATE-UNIT II PH 2 were also analyzed for 1,4-dioxane by EPA
Method 8260D (SIM) to achieve the 3 ug/l LOQ/PQL/RL requirement. Leachate samples were also analyzed
biological oxygen demand (BOD) by EPA Method SM 5210B-2011, chemical oxygen demand (COD) by EPA
Method SM 5220D-2011, nitrate by EPA Method 353.2, orthophosphate by EPA Method 365.1 and sulfate by
EPA Method 300.0. For quality control purposes, an equipment blank was analyzed for Appendix I VOCs (plus
1,4-dioxane (non-SIM)) by EPA Method 8260D. The equipment blank was prepared in the field by pouring
laboratory supplied de-ionized water through a decontaminated Teflon bailer into the sample containers. The
samples were analyzed by Pace Analytical Services, LLC (North Carolina License # 329) in West Columbia,
South Carolina. The samples were collected in general accordance with NCSWS protocol, immediately poured
into laboratory supplied containers, appropriately labeled (with sample identification, sample depth, date and
time), placed in a cooler with wet ice, transferred to the laboratory with chain-of-custody documentation.

Page | 12

During the groundwater sampling activities, BEI conducted a routine up-keep and maintenance inspection at
on-site monitor wells, in order to comply with the March 23, 2017 memorandum from the NCSWS. The
monitor wells were locked, appeared to be in good condition, and in compliance with NCSWS standards.
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4.0 SITE HYDROGEOLOGY

4.1 Shallow Groundwater Flow Direction and Rate

Based on groundwater levels obtained during the second semi-annual 2022 event, shallow groundwater flow at
the Unit II Phase 1 lined MSW landfill is to the west northwest, and is to the west southwest at the Unit II Phase
2 lined MSW landfill toward the drainage swale located to the immediate west. A shallow groundwater flow
direction map is provided in Figure 3. The shallow groundwater horizontal hydraulic gradient, flow direction,
hydraulic conductivity and average linear groundwater velocity data are provided in Table 3.

The horizontal hydraulic gradient observed between shallow monitor wells MW-1 and MW-24 was 0.043 feet
per feet (ft/ft).

Average linear groundwater velocities in the immediate area of shallow on-site monitor wells were determined
using the following equation developed by Darcy (1856) (as described in Fetter (1988)).:

Vx = K/ne x dh/dl

Where: Vx = average linear groundwater velocity (ft/day)
K = hydraulic conductivity at respective well (ft/day)
ne = effective porosity ((0.23) average effective porosity determined for
saprolite and PWR during the Design Hydrogeologic Report for Unit II Phase 1 landfill)
dh/dl = hydraulic gradient (ft/ft) in the vicinity of the respective well

The average linear groundwater velocity for the shallow aquifer ranged from 0.04 ft/day (14.60 ft/year) at
monitor well MW-25 to approximately 1.58 ft/day (576.70 ft/year) at former monitor well MW-29.

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5.0 GROUNDWATER, FRENCH DRAIN, SURFACE WATER, LEACHATE AND FRENCH DRAIN
ANALYTICAL RESULTS

The second semi-annual 2022 groundwater and French drain analytical results are presented in Table 4; the
surface water analytical results are presented in Table 5; and the leachate analytical results are presented in
Table 6. The groundwater and surface water analytical results are illustrated in Figure 4. Historical
groundwater analytical results for monitor wells MW-1, MW-23, MW-24, MW-25, MW-26, MW-27, MW-28
(abandoned), MW-29 (abandoned), MW-30 (abandoned) and MW-31 are presented in Tables 7 through 16,
respectively. Laboratory data sheets are presented in Appendix B. A summary of the groundwater, surface
water, leachate, French drain and quality control analytical results are provided below.

Groundwater Analytical Results

Groundwater samples collected at monitor wells MW-24 and MW-25 indicated Appendix I metals above
NCGPSs, which are summarized below. Groundwater samples collected at downgradient monitor well MW-24
indicated the presence of 49 ug/l cobalt. Groundwater samples collected at monitor well MW-25 indicated 3.4
ug/l cadmium. Groundwater samples collected at remaining monitor wells including MW-1, MW-26, MW-27
and MW-31 did not indicate Appendix I VOCs or metals above NCGPSs.

None of the groundwater samples indicated the presence of 1,4-dioxane (non-SIM; or SIM at MW-1) above the
MDL during the second semi-annual 2022 monitoring event.

No first-time exceedances of target constituents were detected above NCGPSs in any of the groundwater
samples during the second semi-annual 2022 event, therefore, a 14-Day Notification of Groundwater Protection
Standards Exceedance form is not required to be submitted to the NCSWS.

French Drain Analytical Results

French drain sample FD-1 indicate the presence of 10 ug/l cobalt above the NCGPS. In addition, FD-1
indicated the presence of 0.53J ug/l benzene, which was below the NCGPS. A J-flag indicates an estimated
result (<PQL, LOQ or RL and >=MDL).

French drain sample FD-1 did not indicate the presence of 1,4-dioxane (non-SIM) above the MDL during the
second semi-annual 2022 event.

Surface Water Analytical Results

Surface water samples US-1 and DS-1 did not indicate the presence of target Appendix I VOC, 1,4-dioxane
(non-SIM or SIM) or metal constituents above the lowest of: established North Carolina Surface Water and
Wetland Standards (15A NCAC 02B) (Redbook, May 1, 2007)(NC2BRB); North Carolina 15A NCAC 02B
Water Quality Standards for Surface Water (June 10, 2019) (NC2B); or North Carolina In-Steam Target Values
for Surface Water (NCTSW) for the South Fork Catawba River (Class WS-IV waters); or EPA National
Recommended Water Quality Criteria for Aquatic Life and Human Health (EPAWQC), which are collectively
referred to in this report as North Carolina Surface Water and Wetland Standards (NCSWWSs).

Surface water samples US-1 and DS-1 did not indicate the presence of 1,4-dioxane (non-SIM or SIM) above the
MDL during the second semi-annual 2022 monitoring event.
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Leachate Analytical Results

Leachate sample LEACHATE-UNIT II PH 1 indicated the presence of 75 ug/l acetone, 12 ug/l benzene, 140
ug/l 2-butanone, 0.55J ug/l chlorobenzene, 5.9 ug/l 1,4-dichlorobenzene, 0.65J ug/l 1,1-dichloroethane, 1.1 ug/l
1,2-dichloroethane, 1.1 ug/l cis-1,2-dichloroethene, 0.49J ug/l 1,2-dichloropropane, 23 ug/l ethylbenzene, 5.3 JL
ug/l 2-hexanone, 4.7J ug/l 4-methyl-2-pentanone, 3 ug/l styrene, 19 ug/l toluene, 1.3 ug/l vinyl chloride, 59 ug/l
xylenes, 35 ug/l 1,4-dioxane (SIM), 7.3J ug/l antimony, 28 ug/l arsenic, 1,100 ug/l barium, 24J ug/l chromium,
16J ug/l cobalt, 42 ug/l nickel, 34 ug/l vanadium, 220L ug/l nitrate, 38,000 ug/l BOD, 590,000 ug/l COD and
4,700 ug/l sulfate. An L-flag indicates that laboratory control sample (LCS)/laboratory control sample duplicate
(LCSD) failure, therefore, the result is estimated.

Leachate sample LEACHATE-UNIT II PH 2 indicated the presence of 350S ug/l acetone, 15 ug/l benzene, 720
ug/l 2-butanone, 0.91J ug/l chlorobenzene, 10 ug/l 1,4-dichlorobenzene, 0.96J ug/l 1,1-dichloroethane, 3.8 ug/l
1,2-dichloroethane, 10 ug/l cis-1,2-dichloroethene, 0.8J ug/l trans-1,2-dichloroethene, 2 ug/l 1,2-
dichloropropane, 56 ug/l ethylbenzene, 9.7JL ug/l 2-hexanone, 140 ug/l 4-methyl-2-pentanone, 2 ug/l
methylene chloride, 13 ug/l styrene, 180 ug/l toluene, 0.8J ug/l trichloroethene, 5.7 ug/l vinyl chloride, 160 ug/l
xylenes, 26 ug/l 1,4-dioxane (SIM), 15 ug/l arsenic, 760 ug/l barium, 21J ug/l chromium, 10J ug/l cobalt, 34
ug/l nickel, 21J ug/l vanadium, 19J ug/l zinc, 190L ug/l nitrate, 99,000 ug/l BOD, 710,000 ug/l COD and 22,000
ug/l sulfate. An S-flag indicates a matrix spike/matrix spike duplicate failure, therefore, the result is estimated.

Quality Control Analytical Results

The equipment blank indicated the presence of 2.1 ug/l methylene chloride, which appears to be due to
laboratory contamination.
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6.0 STATISTICAL GROUNDWATER EVALUATION ACTIVITIES

BEI conducted statistical groundwater evaluation activities to determine if groundwater constituents historically
detected in unfiltered samples at side/downgradient compliance wells MW-24, MW-25, MW-26, MW-27 and
MW-31 indicated a significant increase above groundwater constituents detected at the upgradient background
well MW-1. Statistical evaluation was not conducted at abandoned monitor wells MW-23, MW-28, MW-29
and MW-30.

J-flagged groundwater constituents were not statistically evaluated during the assessment, since the data is
estimated. B-flagged groundwater data (detected in method blank) was utilized in the statistics.

The following sections outline the methods and results of the statistical groundwater evaluation.

6.1 Statistical Groundwater Evaluation Methods

The statistical groundwater evaluation was conducted using computer software entitled A Ground Water
Information Tracking System with Statistical Analysis Capability, GRITS/STAT v4.2 dated November 1992.
The GRITS/STAT program was developed by the U.S. Environmental Protection Agency (EPA) for the
statistical evaluation of groundwater quality data at RCRA, CERCLA and other regulated facilities.

In order to determine the most appropriate statistical method to evaluate the groundwater data, a Shipiro-Wilk
Test was first conducted to determine the normality of the data. The groundwater data primarily showed
evidence of having a non-normal distribution. Based on the distribution and percentage of detected target
constituents at the site, the Kruskal-Wallis Test was selected to evaluate the historical groundwater data.
Summaries of the selected methods are outlined below.

Kruskal-Wallis Test (Nonparametric Analyses of Variance)

The Kruskal Wallis Test is a nonparametric analyses of variance (ANOVA), which is utilized to test the
hypothesis that all background and compliance wells possess the same median concentration of a groundwater
constituent. If the hypothesis of equal medians is rejected, then GRITS/STAT performs additional calculations
to determine which compliance wells indicate statistical evidence of groundwater contamination.

The Kruskal-Wallis Test is recommended to be conducted on groundwater data which is non-normally
distributed and possess a percentage of non-detects of less than 50. The majority of constituents at the site have
non-detects of less than 50%. This method requires a minimum of two compliance wells and one background
well, and a minimum of four sampling events.

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6.2 Statistical Groundwater Evaluation Results

The results of the statistical groundwater evaluation utilizing the Kruskal-Wallis Test are presented in Table 17.
The supporting statistical evaluation data is maintained on-file with Buxton Environmental, Inc. A summary of
the statistical evaluation results is provided below.

Monitor Well MW-24

The Kruskal-Wallis Test indicated that historical groundwater samples collected at monitor well MW-24
indicated barium, cobalt and lead at levels statistically above background concentrations.

Monitor Well MW-25

The Kruskal-Wallis Test indicated that historical groundwater samples collected at monitor well MW-25
indicated barium at levels statistically above background concentrations.

Monitor Well MW-26

The Kruskal-Wallis Test indicated that historical groundwater samples collected at monitor well MW-26 did not
indicate statistically significant concentrations of target constituents above background levels.

Monitor Well MW-27

The Kruskal-Wallis Test indicated that historical groundwater samples collected at monitor well MW-27
indicated barium at levels statistically above background concentrations.

Monitor Well MW-31

The Kruskal-Wallis Test indicated that historical groundwater samples collected at monitor well MW-31
indicated barium at levels statistically above background concentrations.

No other statistically significant groundwater constituents were identified at the site.

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7.0 CONCLUSIONS

On December 29 and 30, 2022, BEI conducted the second semi-annual 2022 Appendix I groundwater, French
drain, surface water and leachate Detection Monitoring event at the Gaston County Unit II Phase 1 & Phase 2
Lined MSW Subtitle D Landfill - Hardin Site (Permit No.: 3606) located at 3155 Philadelphia Church Road in
Dallas, North Carolina. Groundwater monitoring activities were conducted at six (6) shallow monitor wells
including MW-1, MW-24, MW-25, MW-26, MW-27 and MW-31. Groundwater monitoring was not conducted
at monitor wells MW-28, MW-29 and MW-30, since the NCSWS approved them to be abandoned on October
26, 2022 prior to anticipated construction of the Unit III lined MSW landfill expansion. French drain water
sample FD-1 was collected from the effluent French drain pipe located beneath the Unit II Phase 2 MSW
landfill. No samples were collected from French drain FD-2 located beneath the Unit II Phase 1 MSW landfill,
due to dry conditions. Surface water monitoring was conducted at two locations including US-1 and DS-1,
which are located along a drainage ditch to the west of the Unit II Phase 1 lined landfill. Leachate sample
LEACHATE-UNIT II PH 1 was collected from the Unit II Phase 1 MSW landfill leachate pump station; and
leachate sample LEACHATE-UNIT II PH 2 was collected from the leachate sump at the Unit II Phase 2 MSW
landfill. A summary of the findings of this investigation is provided below.

• From January to May 2023, Shamrock completed clearing and preliminary grading of the Unit III lined
MSW landfill area; 2) demolition of the former upper lined landfill storm water pond (upper LLO-2); 3)
construction of the Unit III lined landfill French drain FD-III along the entire length of the main
drainage swale; and 4) construction of the new Unit III storm water basin (with was equipped with an
overflow dam with boulder/rock spill-way; drainage riser pipe and side effluent pipe equipped with a
boulder/rock cascade flowing toward the drainage swale; and surface water skimmer). Based on weekly
observations by BEI during these construction activities, the Unit III French drain was installed by
excavating a trench in sections starting at the head-waters along the entire length of the drainage swale
down to just below the base elevation of the drainage swale and along the center-line of the drainage
swale, which was below the entire length of the to-be constructed Unit III lined MSW landfill expansion
and Unit III storm water pond, and day-lighted at the toe of the Unit III storm water pond dam directly
into the drainage swale. If rock outcrop obstructions were encountered during excavation of the trench,
the French drain trench was excavated around the edge of the rock feature maintaining the correct
drainage depth and slope. The French drain FD-III was constructed by installing: a layer of geo-textile
fabric at the base and along the length of the drainage swale excavation trench, perforated 8-inch
diameter HDPE pipe was coupled together in sections, the pipe was encapsulated by with a permeable
gravel pack, capped with geo-textile fabric, and finally backfilled to landfill base grade with clean fill
dirt. The upper French drain FD-1, which was installed along the upper side drainage feature beneath
the Unit II Phase 2 lined landfill, was extended and connected into French drain FD-III. Based on recent
semi-annual groundwater monitoring activities, effluent flow from FD-1 is estimated to be less than 0.5
gal/min. The lower French drain FD-2, which was installed along the lower side drainage feature
beneath the Unit II Phase 1 lined landfill, was extended as a separate pipe beneath the Unit III storm
water pond, which day-lighted at the toe of the Unit III storm water pond dam directly into the drainage
swale. Based on routine semi-annual groundwater monitoring activities at the site, French drain FD-2
has been dry since 2014.

• On March 13, 2023, the NCSWS issued a memorandum requiring PFAS analyses during groundwater,
surface water and leachate monitoring conducted after July 1, 2023 at all landfills regulated under 15A
NCAC 13B Rules: 0601 and .0602 (all other landfills not regulated under .0531-0546 and .1600 rules);
.0544 and .0545 (C&D landfills); and .1623, and .1630 - .1637 (Subtitle D lined MSW landfills).
According to the memo, PFAS include a group of manufactured compounds used in aerospace,
automotive, textiles, electronics, food packaging, stain-repellent products, non-stick products and
firefighting foams that do not breakdown in the environment and bioaccumulate in humans and animals
through soil and drinking water and are linked to adverse health effects. On July 20, 2023, Mr. Perry
Page | 19

Sugg (NCSWS - Environmental Compliance Branch Head), clarified that PFAS monitoring was also
required at old closed MSW landfills that fall under old NCSWS Rule .0500 that defaults to North
Carolina 2L groundwater monitoring rules. Water samples should be analyzed by EPA (Draft) Method
1633 (PFAS) by a DOD accredited laboratory.

• On July 17, 2023, the NCSWS issued a memorandum clarifying PFAS monitoring requirements at solid
waste sanitary landfills. The letter addresses landfill types that should comply; monitoring frequency
(minimum of two (2) consecutive sample events, after which the data will be evaluated for future
continued monitoring requirements); sampling methodology (including sampling practices and
precautions to avoid equipment cross-contamination); analytical method and laboratories (EPA (Draft)
Method 1633 for up to 40 PFAS compounds by a DOD accredited laboratory); monitoring locations
(groundwater wells, surface water locations, underdrains (French drains) and leachate); and reporting
(routine report preparation and submittal, along with EDD requirements in the EQUIS format).

• During the groundwater sampling activities, BEI conducted a routine up-keep and maintenance
inspection at on-site monitor wells, in order to comply with the March 23, 2017 memorandum from the
NCSWS. The monitor wells were locked, appeared to be in good condition, and in compliance with
NCSWS standards.

• Shallow groundwater flow at the Unit II Phase 1 lined MSW landfill is to the northwest, and is to the
west southwest at the Unit II Phase 2 lined MSW landfill toward the drainage swale located to the
immediate west. The horizontal hydraulic gradient observed between shallow monitor wells MW-1 and
MW-24 was 0.043 feet per feet (ft/ft). The average linear groundwater velocity for the shallow aquifer
ranged from 0.04 ft/day (14.60 ft/year) at monitor well MW-25 to approximately 1.58 ft/day (576.70
ft/year) at former monitor well MW-29.

• Groundwater samples collected at monitor wells MW-24 and MW-25 indicated Appendix I metals
above NCGPSs, which are summarized below. Groundwater samples collected at downgradient monitor
well MW-24 indicated the presence of 49 ug/l cobalt. Groundwater samples collected at monitor well
MW-25 indicated 3.4 ug/l cadmium. Groundwater samples collected at remaining monitor wells
including MW-1, MW-26, MW-27 and MW-31 did not indicate Appendix I VOCs or metals above
NCGPSs. None of the groundwater samples indicated the presence of 1,4-dioxane (non-SIM; or SIM at
MW-1) above the MDL. No first-time exceedances of target constituents were detected above NCGPSs
in any of the groundwater samples during the second semi-annual 2022 event, therefore, a 14-Day
Notification of Groundwater Protection Standards Exceedance form is not required to be submitted to
the NCSWS.

• French drain sample FD-1 indicate the presence of 10 ug/l cobalt above the NCGPS. In addition, FD-1
indicated the presence of 0.53J ug/l benzene, which was below the NCGPS. French drain sample FD-1
did not indicate the presence of 1,4-dioxane (non-SIM) above the MDL.

• Surface water samples US-1 and DS-1 did not indicate the presence of target Appendix I VOC, 1,4-
dioxane or metal constituents above established NCSWWSs. Surface water samples US-1 and DS-1 did
not indicate the presence of 1,4-dioxane (non-SIM or SIM) above the MDL.

• Leachate samples LEACHATE-UNIT II PH 1 and LEACHATE-UNIT II PH 2 indicated numerous
Appendix I VOCs, 1,4-dioxane (SIM) and metal constituents.
Page | 20

8.0 RECOMMENDATIONS

Based on the findings of this assessment, Buxton Environmental, Inc. makes the following recommendations.

• Semi-annual Appendix I groundwater, French drain, surface water and leachate Detection Monitoring
should continue to be conducted at the Gaston County Unit II Phase 1 and Phase 2 Lined MSW Subtitle
D Landfill in general accordance with NCSWS Rules and memorandums, recent discussions with the
NCSWS concerning Appendix I metal and VOC exceedances, and established analytical parameter
monitoring requirements/schedules. The next monitoring event is anticipated to be conducted in
September 2023, and will include the new PFAS analytical requirement (EPA Method 1633). French
drain monitoring will be discontinued at the newly combined FD-III/FD-1 effluent pipe until the initial
four (4) background/baseline groundwater monitoring events are conducted for the Unit III lined MSW
landfill.

• The Assessment Monitoring Program / Alternate Source Demonstration Investigation Report for the
metals exceedances at the Unit II Phase 1 & 2 lined MSW landfill is in the final stage of completion and
will be submitted NCSWS.

• Future groundwater sampling at the site should continue to be conducted with non-metallic down-hole
sampling devices, in order to remove the possibility for field introduced metals contamination.

• A copy of this report should be forwarded to the NCSWS for their review.

Page | 21

9.0 REFERENCES

Buxton Environmental, Inc., Design Hydrogeologic Report- Revision 1, Proposed Lined Subtitle D
Municipal Solid Waste Landfill, Unit II Phase I , September 14, 2007.

Buxton Environmental, Inc., Design Hydrogeologic Report, Proposed Lined Subtitle D Municipal
Solid Waste Landfill Expansion - Unit II Phase 2, June 30, 2016.

Buxton Environmental, Inc. Water Quality Monitoring Plan Update, Unit II Phase 1 & 2 Lined Subtitle D
MSW Landfill, October 17, 2016.

Fetter, C.W., 1988, Applied Hydrogeology, Second Edition.

GRITS/STAT v4.2, November 1992, A Ground Water Information Tracking System with Statistical
Analysis Capability.

Resolve Environmental Services, P.A., First Semi-Annual 1998 Appendix II Groundwater
Monitoring, Gaston County Sanitary Landfill, June 11, 1998.

FIGURES

TABLES
Well ID Latitude Longitude Drilling Install TD TD Screen Screen Sand Bentonite Grout Ground TOC DTW DTW
(degrees)(degrees)Company Date BTOC BGS Length Depth BGS BGS BGS BGS Elevation Elevation BTOC Elevation
(ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft)
MW-1 35.383615 -81.170086 Law Eng.1-6-87 64.7 62 20 42-62 40-62 38-40 0-38 801.48 803.48 57.80 745.68
MW-24 35.382806 -81.174687 SAEDACCO 10-31-08 23.40 20.5 15 5.5-20.5 4-20.5 2-4 0-2 --701.04 14.75 686.29
MW-25 35.381475 -81.175661 SAEDACCO 10-30-08 38.35 38 15 23-38 21-38 18-21 0-18 --704.00 30.48 673.52
MW-26 35.381017 -81.174183 SAEDACCO 10-30-08 22.60 19.5 15 4.5-19.5 2.5-19.5 0.5-2 0-0.5 714.77 717.75 12.15 705.60
MW-27 35.381103 -81.171844 SAEDACCO 10-31-08 29.20 26 15 11-26 9-26 7-9 0-7 741.65 744.44 13.70 730.74
MW-28 35.383863 -81.174185 EDPS 1-26-17 60.50 58 15 43-58 41-58 39-41 0-39 725.50 728.00 ----
MW-29 35.384715 -81.173209 EDPS 1-27-17 24.60 22 15 7-22 4-22 2-4 0-2 716.70 719.30 ----
MW-30 35.385716 -81.172482 Summit Eng.1-30-17 30.98 28 15 13-28 11-28 9-11 0-9 735.12 738.10 ----
MW-31 35.387010 -81.171894 Summit Eng.1-30-17 51.00 48 15 33-48 31-48 29-31 0-29 766.80 769.40 37.85 731.55
Notes:
The well heads at MW-26 and MW-27 were lowered and re-established from February 7-20, 2017.
Depth to water measurements obtained December 29 and 30, 2022 to the nearest 0.01 foot
with a depth to water meter.
TD=total depth;BTOC=below top of casing;TOC=top of casing;DTW=depth to water;ft=feet
Latitude and longitude determined from HDR base maps for the subject site.
"--" = no data
Monitor wells MW-28, MW-29 & MW-30 were approved to be abandoned by the NCSWS on October 26, 2022, therfore, were not monitored. The abandonment
by overdrilling was conducted from November 14, 2022 to January 13, 2023 prior to construction of Unit III MSW landfill.
rk:table:gastonunitIIgauge.1222
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
TABLE 1
GROUNDWATER GAUGING DATA
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
TABLE 2
FIELD PARAMETER DATA
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
Sample ID Sample pH Conductivity Temperature Turbidity
Method (SU)(uS/cm)(Celsius)(NTU)
MW-1 bailer 5.95 190 16.8 7.75
MW-24 bailer 6.21 210 15.4 8.60
MW-25 bailer 5.59 80 14.4 9.35
MW-26 bailer 5.69 170 15.8 11.36
MW-27 bailer 5.58 60 17.4 7.65
MW-28 NT NT NT NT NT
MW-29 NT NT NT NT NT
MW-30 NT NT NT NT NT
MW-31 bailer 5.18 80 16.5 7.37
FD-1 grab 6.44 760 17.7 25.50
FD-2 dry dry dry dry dry
US-1 grab 6.30 110 6.3 --
DS-1 grab 5.75 120 10.5 --
LEACHATE-UNIT II PH 1 grab 6.75 6,000+19.0 --
LEACHATE-UNIT II PH 2 grab 6.50 6,000+20.8 --
Notes:
Field parameters collected December 29-30, 2022 by Buxton Environmental, Inc. utilizing a calibrated HANNA GroLine or
and an AMTAST-AMT27 turbidity meter.
Field parameters at monitor wells collected after purging a minimum of 3 well volumes of water or until dryness with a Teflon bailer and nylon string.
Leachate and surface water field parameters collected immediately prior to sampling.
SU = standard units
uS/cm = microsiemens per centimeter
NTU = nephelometric turbidity units
Monitor wells MW-28, MW-29 & MW-30 were approved to be abandoned by the NCSWS on October 26, 2022, therfore, were not monitored.
The abandonment by overdrilling was conducted from November 14, 2022 to January 13, 2023 prior to construction of Unit III MSW landfill.
"--" = not tested
rk:table:gastonunitIIgauge.1222
Well ID Lithologic Groundwater Hydraulic Hydraulic Average Hydraulic Gradient Average Linear Average Linear
Unit Flow Conductivity Conductivity Effective Porosity (feet/feet)Groundwater Velocity Groundwater Velocity
Screened Direction (cm/sec)(ft/day) (unitless)(feet/day)(feet/year
MW-1 Saprolite/PWR/Bedrock S 87o W 2.39 x 10-4 0.68 0.23 0.044 0.13 47.45
MW-24 Saprolite S 69o W 1.36 x 10-4 0.39 0.23 0.040 0.07 25.55
MW-25 Saprolite/PWR N 67o W 7.54 x 10-5 0.21 0.23 0.045 0.04 14.60
MW-26 Saprolite N 60o W 1.32 x 10-4 0.37 0.23 0.056 0.09 32.85
MW-27 Saprolite/PWR N 72o W 1.98 x 10-4 0.56 0.23 0.043 0.10 36.50
MW-31 Saprolite S 30o W 3.54 x 10-4 0.91 0.23 0.044 0.17 62.05
Notes:
Hydraulic gradient and groundwater flow direction data obtained from the Shallow Groundwater Flow
Direction Map (Figure 3).
Hydraulic conductivity values at MW-23, MW-24, MW-25, MW-26, MW-27 obtained from
rising head slug tests conducted by Buxton Environmental, Inc. on May 8, 2007 and November 13, 2008.
Hydraulic conductivity value at MW-1 obtained from Resolve "First Semi-Annual 1998 Appendix II
Groundwater Monitoring" report dated June 11, 1998
Hydraulic conductivity at MW-31 obtained with aquifer pumping test and Theis-Confined Aquifer method, test conducted by
Buxton Environmental, Inc. on February 6, 2017.
See report text for average linear groundwater velocity equation.
Groundwater seepage velocities assume an average 23% effective porosity, as determined for the saprolite and partially
weathered bedrock (PWR) during Design Hydrogeologic investigation at Unit II Phase I lined landfill.
* = estimated effective porosity based on percent and width of fractures encountered during drilling, and assuming
the fractures are sediment filled.
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
TABLE 3
HYDROGEOLOGIC DATA
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
TABLE 4
APPENDIX I GROUNDWATER AND FRENCH DRAIN ANALYTICAL RESULTS
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
Well ID Appendix I VOCs (EPA 8260D)EPA 8260D (SIM) Appendix I Metals (EPA 6020B)
Acetone Benzene 1,4-Dioxane cis-1,2-DCE 1,4-Dioxane As Ba Be Cd Cr Co Cu Ni Pb Tl Zn
LOQ 20 1 50 1 3 2 5 0.4 0.5 5 5 5 5 1 0.5 10
MDL 5 0.4 13 0.4 1 1.3 1.3 0.15 0.13 1.3 1.3 1.3 1.3 0.25 0.15 2.5
Groundwater
MW-1 BDL BDL BDL BDL BDL BDL 12 BDL BDL BDL BDL BDL BDL BDL BDL BDL
MW-24 15J BDL BDL 0.43J NT BDL 120 0.19J 0.24J BDL 49 3.1J 2.7J BDL 0.26J 4.2J
MW-25 BDL BDL BDL BDL NT BDL 34 0.27J 3.4 BDL BDL 1.3J BDL 0.36J BDL 4.2J
MW-26 BDL BDL BDL BDL NT BDL 86 0.24J 0.19J 3.9J BDL 1.9J BDL 0.32J BDL 5.9J
MW-27 BDL BDL BDL BDL NT BDL 56 0.44 BDL BDL BDL BDL BDL 0.41J BDL 2.7J
MW-31 BDL BDL BDL BDL NT BDL 200 0.47 0.3J BDL BDL 2.4J BDL BDL 0.15J 3.7J

French Drain
FD-1 BDL 0.53J BDL BDL NT 2.8 200 BDL BDL 1.4J 10 3.7J 2.7J 0.83J BDL 6J
FD-2 NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*NT*
NCGPS 6,000 1 3 70 3 10 700 4 2 10 1 1,000 100 15 2 1,000
Notes:
Groundwater & French drain water samples were collected December 29 & 30, 2022 & were analyzed for Appendix I volatile organic compounds (VOCs)
(+ 1,4-dioxane (non-SIM)) by EPA Method 8260D; & Appendix I metals by EPA 6020B. Groundwater sample MW-1 also analyzed for 1,4-Dioxane by EPA Method
8260D (select ion monitoring (SIM)).
Analyses by Pace Analytical Services, LLC (NC Certification No.: 329) in W. Columbia, SC.
DCE = dichloroethene; Ba = barium; Be = beryllium; Cr = chromium; Cu = copper; Co = Cobalt; Pb = lead;
Ni = nickel; Tl = Thallium; Sb = antimony; Se = selenium; V = vanadium; Zn = zincNCGPS=North Carolina Groundwater Protection Standard (April 11, 2022)
BDL = Below Detection Limit; NT = not tested; NT* = not tested due to dry conditions (FD-2)
Bold and shade denotes above established NCGPS or NCSWWS (J-flagged data not considered)
LOQ = limit of quantitation (aka: report limit (RL) or practical quantitation limit (PQL)) is the lowest quantitation limit attainable by the EPA method
MDL = method detection limit is the lowest qualified limit (estimated result) attainable by the EPA method
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <LOQ or PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality Standards
(primary standard used to establish NCGPS's) dated April 1, 2022, J-flagged groundwater data exceeding the standard does not constitute an exceedance).
L = laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) failure
Sample ID EPA 8260D (SIM) Appendix I Metals (EPA 6020B)
Acetone 1,4-Dioxane 1,4-Dioxane Ba Cu Pb
LOQ 20 50 3 5 5 1
MDL 2 13 1 1.3 1.3 0.25
Surface Water
US-1 5JL BDL BDL 33 1.5J BDL
DS-1 BDL BDL BDL 37 BDL 0.44J
NCSWWS 3,100(NCTSW)0.35(NCTSW)0.35(NCTSW)1,000(NC2BRB)1,300(EPAWQC)25(NC2BRB)
Notes:
Surface water samples were collected on December 29 & 30, 2022 and were analyzed for Appendix I volatile organic compounds (VOCs) (plus 1,4-dioxane) by
EPA Method 8260D; 1,4-Dioxane by EPA Method 8260D (select ion monitoring (SIM)); and Appendix I metals by EPA 6020B.
Analyses by Pace Analytical Services, LLC (NC Certification No.: 329) in W. Columbia, SC. Surface water samples were grab samples.
Ba = barium; Be = beryllium; Cr = chromium; Cu = copper; Ni = nickel; Pb = lead; V = vanadium; Zn = zinc
NCSWWS = lowest of: established North Carolina Surface Water and Wetland Standards (15A NCAC 02B) (Redbook, May 1, 2007)(NC2BRB);
North Carolina 15A NCAC 02B Water Quality Standards for Surface Water (June 10, 2019) (NC2B); or North Carolina In-Steam Target Values
for Surface Water (NCTSW) for South Fork of Catawba River (Class WS-IV Water); or EPA National Recommended Water Quality Criteria
for Aquatic Life and Human Health (EPAWQC). Criteria.
BDL = Below Detection Limit; NA = not applicable
Bold and shade denotes above established NCSWWS (J-flagged data not considered)
LOQ = limit of quantitation (aka: report limit (RL) or practical quantitation limit (PQL)) is the lowest quantitation limit attainable by the EPA method
MDL = method detection limit is the lowest qualified limit (estimated result) attainable by the EPA method
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <LOQ or PQL and >=MDL
L = laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) failure
TABLE 5
APPENDIX I SURFACE WATER ANALYTICAL RESULTS
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
Appendix I VOCs (EPA 8260D)
Sample ID.LEACHATE-UNIT II PH 1 LEACHATE-UNIT II PH 2
Appendix I VOCs (EPA 8260D)
Acetone 75 350S
Benzene 12 15
2-Butanone 140 720
Chlorobenzene 0.55J 0.91J
1,4-Dichlorobenzene 5.9 10
1,1-Dichloroethane 0.65J 0.96J
1,2-Dichloroethane 1.1 3.8
cis-1,2-Dichloroethene 1.1 10
trans-1,2-Dichloroethene BDL 0.8J
1,2-Dichloropropane 0.49J 2
1,4-Dioxane BDL BDL
Ethylbenzene 23 56
2-Hexanone 5.3JL 9.7JL
4-Methyl-2-Pentanone 4.7J 140
Methylene Chloride BDL 2
Styrene 3 13
Toluene 19 180
Trichloroethene BDL 0.8J
Vinyl Chloride 1.3 5.7
Xylenes 59 160

1,4-Dioxane (EPA 8260D SIM)35 26
Appendix I Metals (EPA 6020B)
Antimony 7.3J BDL
Arsenic 28 15
Barium 1,100 760
Chromium 24J 21J
Cobalt 16J 10J
Nickel 42 34
Vanadium 34 21J
Zinc BDL 19J
Additional Parameters
Nitrate 220L 190L
BOD 38,000 99,000
COD 590,000 710,000
Orthophosphate BDL BDL
Sulfate 4,700 22,000
Notes:Leachate samples collected on December 30, 2022 by Buxton Environmental, Inc. and analyzed for above listed parameters by Pace Analytical Services, LLC.J = estimated result <PQL or LOQ and >=MDLB = detected in method blank1=G:G lower than valid range; H = analyzed out of EPA holding time; S = matrix spike/matrix spike duplicate failuredata presented in micrograms per liter (ug/l)only detected constituents are presented
L = laboratory control sample (LCS)/laboratory control sample duplicate (LCSD) failure
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
TABLE 6
LEACHATE ANALYTICAL RESULTS
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 LINED SUBTITLE D LANDFILL - HARDIN SITE
Constituent Sampling Dates NC
(ug/1)11/93 2/94 5/94 11/94 5/95 9/95 3/96 9/96 3/97 9/97 4/98 6/98 7/98 7/98 8/98 9/98 3/99 10/99 5/99 9/99 3/00 5/00 12/00 4/01 10/01 3/02 4/02 10/02 4/03 10/03 4/04 10/04 4/05 11/05 5/06 11/06 5/07 11/07 GPS
Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6,000CBBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL50
CD BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700
CM BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3
1,4-DCB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 61,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT 3AntimonyBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL.25BJ 1ArsenicBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL10BariumBDLBDL100BDL129209.5 BDL 315 320 260 200 26 BDL BDL BDL 130 BDL BDL 92 BDL BDL 25 86 BDL 44 46 66 46 40 79 37 170 66 160 100 62 9.6 13 700
Beryllium BDL BDL BDL BDL BDL BDL BDL BDL 2 4 2 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3 3.3B BDL BDL .045BJ 4
Cadmium BDL BDL BDL BDL BDL 0.32 BDL BDL 1 BDL BDL BDL BDL BDL 4 BDL BDL BDL BDL 3 4 BDL BDL BDL BDL 1.2 BDL 1.2 BDL BDL BDL BDL BDL BDL BDL 3.3 0.26 0.33 2
Cobalt BDL BDL 160 BDL BDL BDL BDL BDL 6 15 15 BDL 12 BDL 11 BDL BDL BDL BDL BDL 10 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.11J .27BJ 1CopperBDLBDLBDLBDL2644.3 BDL 46.0 25 55 42 3.0 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 14 BDL BDL BDL BDL BDL BDL 17 11 33 BDL 28 16 11 0.46J 1.4B 1,000ChromiumBDLBDLBDLBDL1829.9 BDL 38.1 10 27 46 3 21 BDL 18 13 BDL BDL BDL 12 15 BDL 9 BDL BDL 6.5 7 6.5 BDL BDL BDL 15 BDL 18 12 5.2 0.8J 1.1J 10LeadBDLBDLBDLBDLBDL23BDL25.9 18 32 26 BDL 15 BDL 12 17 16 BDL BDL 11 18 BDL 7 BDL BDL BDL 5 BDL BDL 5.2 BDL 18 BDL 18 10 BDL 0.18J .079J 15
Mercury*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT BDL NT 0.58 NT BDL BDL NT NT BDL BDL BDL BDL NT BDL NT NT BDL NT NT NT BDL NT NT NT BDL 1
Nickel BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.3J 0.42J 100
Selenium BDL BDL BDL BDL BDL BDL BDL 7.32 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20SilverBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL0.078J .16BJ 20ThalliumBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL13BDLBDL15BDLBDLBDL2VanadiumBDLBDLBDLBDL59.6 88.1 BDL 120 80 31 180 BDL 65 BDL 55 BDL 40 BDL BDL BDL 52 BDL 35 BDL BDL 17 27 17 BDL BDL 12 71 14 67 43 26 BDL BDL 7
Zinc 10 30 20 30 128 137.6 BDL 209 100 20 170 21 110 BDL 91 BDL BDL BDL 130 89 100 BDL 43 BDL 25 30 36 30 BDL 42 38 92 28 100 59 40 7.2BJ 7.8J 1,000
bis (2-E) P*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT 1.1BJ 3
DEP*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL 6,000Di-n-Butyl P*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT 5.5 NT NT NT BDL NT NT NT 1.3J 700Endosulfan II*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL 42EA*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL 23&4 MP*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL 40
Aldrin*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL 0.002
beta-BHC*NT NT NT NT BDL NT NT NT BDL NT BDL NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL 0.019
Sulfide *NT NT NT NT BDL NT NT NT BDL NT 1,000 NT NT NT NT NT NT NT BDL NT NT BDL NT BDL NT NT NT NT NT 1,800 NT NT NT BDL NT NT NT 1,300 NS
Constituent NC(ug/1)6/08 11/08 12/08 2/09 3/09 6/09 11/09 4/10 11/10 5/11 12/11 5/12 12/12 5/13 12/13 5/14 12/14 5/15 12/15 5/16 12/16 2/17 2/17 2/17 3/17 7/17 12/17 2/18 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22 12/22 GPS
Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6.9BJ BDL BDL BDL BDL BDL 2.4J BDL BDL BDL BDL BDL BDL NT 2.2J BDL 2.4J BDL BDL BDL BDL BDL BDL BDL 6,000CBBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL0.2J BDL BDL BDL BDL BDL BDL BDL BDL NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 50CDBDLBDLBDL0.33J BDL BDL 0.4BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700CMBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL0.71J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3
1,4-DCB BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.36J BDL BDL BDL BDL BDL BDL BDL BDL NT BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6
1,4-Dioxane NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL BDL BDL BDL BDL BDL BDL 3
Antimony 0.39J .82BJ 1.4 1.7 .49J BDL 1.6 0.41J 1.9 BDL 0.22J BDL BDL 0.17J BDL BDL 0.14J 0.19J BDL 0.18J 0.44J .51BJ .35BJ 0.85J 1J BDL 1.1J 0.51J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1
Arsenic 0.34J BDL BDL BDL .56BJ 0.36J 0.3J BDL 0.27J BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.35J 0.36J BDL .35J 0.5J BDL BDL BDL BDL BDL BDL 1.2 BDL BDL 2 BDL BDL BDL BDL BDL 10Barium18B1113B2217B274114359.3 7.8 13 16 27B 9.6 14 14B 21 13 21 18 19 19 30 21 14 41 240 14 15 17 13 61 36 33 37 11 12 700Beryllium0.11BJ .069J 0.04BJ 0.17J .042J 0.15J 0.31J .032J 0.2J BDL BDL 0.061J BDL 0.19J BDL BDL BDL BDL BDL BDL BDL 0.13J BDL 0.22J BDL BDL 0.29J 2.3 BDL BDL BDL BDL 0.27J BDL BDL BDL BDL BDL 4Cadmium0.34 0.26 1.9 0.34 0.16 0.21 0.56 0.29 1.30 .073J 0.17 0.092J 0.16 1.50 0.23 .092J 0.45 0.62 0.38 0.36 0.42 0.16 0.14 BDL BDL BDL 0.53 1.6 0.35J 0.65J BDL BDL 0.49J BDL 0.34J 0.88 0.22J BDL 2
Cobalt 0.18BJ 0.16J 0.16BJ0.91BJ .35BJ 1.1J 1.8J 0.12J 2.5J .068J .083J 0.41J .097J 1.2J 0.16J 0.1J 0.073J 1.2J 1.9J 0.9J 0.85J 0.75J 0.96J 2.4J 2.9J BDL 4.7J 27 BDL 3.6 BDL BDL 13 BDL 5.5 2.3J BDL BDL 1
Copper 0.74J 0.84J 1.6 3.8 1.6B 3.8 6 0.45BJ 6.9 BDL 0.57J 1.5 .87BJ 4B 1.2B .65BJ 1.5 3.1 1.3 1.4 1.4 1.5 1.8 4.7J 7.1 1.3J 11 48 2.1J 3.1J BDL BDL 5.8 BDL 3.8J 3.1J 3.1J BDL 1,000
Chromium 0.59J 0.38J 0.96J 0.52J BDL 1.8 3.5J 0.55J 4.1J 1.9BJ 0.36J 0.52J .48J 2J 0.54J BDL 0.84J 1.9J 0.72J 0.78J 2.6J 5.1 3.4J 47 180 7.5 39 88 1.8J 1 2.1J BDL 5.3 BDL BDL BDL BDL BDL 10Lead0.19BJ 0.3J 0.75J 1.6 0.69J 2.4 3.7 0.16J 3.5 0.07J 0.14J 1.2 0.25J 2.3B 0.11J 0.16J 0.32BJ 1.3 0.6J 0.76J 0.91J 1.1B 1.1 3.7 1.4 0.5J 5.2 34 0.67J 0.75J 0.4J BDL 3.4 0.54J 2.1 0.71J BDL BDL 15Mercury*0.1 NT NT NT NT NT BDL NT NT NT .06BJ NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT NT BDL NT NT NT BDL BDL NT 1Nickel0.32J 0.34J 0.45J 1.1J 0.41J 0.48J 1.8J BDL 2.8J BDL BDL 0.63J 0.48BJ 1.4J 0.51J BDL 0.47J 1.3J 0.81J 0.65J 2.9J 1.5J 1.2J 29 100 4.2J 19 38 2J 1.5J BDL BDL 2.4J BDL BDL BDL BDL BDL 100
Selenium 0.33J 0.26J BDL BDL BDL BDL 0.35J BDL BDL0.54BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.6J BDL BDL BDL BDL BDL BDL 20
Silver 0.33J 0.05J 0.94J 0.15J .085BJ .029J .35BJ .076J 0.03J BDL .054BJ .071J BDL .067J BDL .21BJ 0.012J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Thallium 0.11BJ BDL BDL BDL BDL BDL 0.13J BDL BDL BDL BDL BDL BDL .077J BDL BDL BDL BDL BDL BDL BDL .09BJ BDL BDL BDL BDL 0.13J 0.66 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2Vanadium2.7J 2.4J 2.7J 7.2 5.1B 10 15B 2.4J 14 1.9J 2.2J 3.6J BDL 4J BDL 2.9J 2BJ 5.3 3.4J 4.8BJ 6.2B 3.9J 4.1J 12 6.8 3.2J 18B 97 3.1J 3.8 BDL BDL 18 BDL 14 6.8 BDL BDL 7Zinc4.8J 4.8J 10 15 5.6BJ 14 23 1.9J 22 BDL 2.2BJ 10B 5.1BJ 17B 7.5J 7.3J 7.5J 10 6.8J 76B 8.1J 5BJ 5.9J 15 7.6J 3.6J 19 130 3.8J 6.4J 5.4BJ BDL 15 BDL 5.7J 5.9J BDL BDL 1,000bis (2-E) P*BDL NT NT NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT 0.63J NT NT NT NT NT NT NT BDL NT NT NT NT BDL NT NT NT BDL BDL NT 3
DEP*BDL NT NT NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT NT 0.46J NT NT NT NT BDL NT NT NT BDL BDL NT 6,000
Di-n-Butyl P*BDL NT NT NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT NT 0.69J NT NT NT BDL BDL NT 700
Endosulfan II*BDL NT NT NT NT NT NT NT NT NT .0028J NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT NT BDL NT NT NT BDL BDL NT 42EA*BDL NT NT NT NT NT NT NT NT NT .005JP NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT NT BDL NT NT NT BDL BDL NT 23&4 MP*BDL NT NT NT NT NT NT NT NT NT BDL NT NT BDL BDL NT NT NT BDL NT NT NT NT NT NT NT BDL NT NT NT NT BDL NT NT NT BDL BDL NT 40Aldrin*BDL NT NT NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT BDL BDL BDL NT NT NT NT NT BDL BDL NT BDL NT BDL BDL BDL NT BDL NT BDL NT 0.002beta-BHC*BDL NT NT NT NT NT NT NT NT NT BDL NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT NT BDL NT BDL NT BDL BDL BDL NT BDL NT BDL NT 0.019
Sulfide *800J NT NT NT NT NT NT NT NT NT 9,100 NT NT NT BDL NT NT NT BDL NT NT NT NT NT NT BDL BDL NT BDL NT BDL BDL BDL NT BDL NT BDL NT NSNotes:Only historical groundwater constituents detected are presented.Reference associated groundwater monitoring report for analytical methods and detection limits. BDL = below detection limit; NT = not testedbis (2-E) P = bis (2-Ethylhexyl) Phthalate; CB = chlorobenzene; CD = carbon disulfide; CM = chloromethane; DCB = dichlorobenzene; DEP = diethylphthalate; EA = endrin aldehyde; MP = methylphenol; P = Phthalate* = denotes Appendix II constituent, remaining constituents are Appendix INCGPS = North Carolina Groundwater Protection Standard; NS = no standard; bold and shade denotes above established NCGPS; data presented in micrograms per liter (ug/l); B = detected in method blankJ = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality Standards (primary standard used to establish
NCGPS's) dated April 1, 2022, J-flagged groundwater data exceeding the standard does not constitute an exceedance. P = The RPD between two GC columns exceeds 40% (results suspect)
Groundwater Appendix I metals results for MW-1-B (collected 2/21/18) were selected to represent/replace MW-1 background data (collected 12/27/17) the second semi-annual 2017 event.
Sampling Dates
PERMIT NO.: 36063155 PHILADELPHIA CHURCH ROADDALLAS, NORTH CAROLINA
TABLE 7HISTORICAL GROUNDWATER ANALYTICAL RESULTSMW-1GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
TABLE 8
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-23
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
Constituent (ug/1)Sampling Date NCGPS
11/08 12/08 2/09 3/09 11/10 5/11 12/11 5/12 12/12 5/13 11/13 5/14 12/14 5/15 12/15 5/16
Appendix I VOCs
Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7.2BJ BDL BDL BDL BDL BDL 6,000
Carbon Disulfide BDL BDL BDL BDL 0.19BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700
4-Methyl-2-Pentanone BDL 0.41BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100
Appendix I Metals
Antimony 0.2BJ BDL 0.17J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1
Arsenic BDL 0.43J 0.66J 0.69BJ BDL 0.47J 1.1 BDL 0.59J BDL BDL 0.36J 0.46J BDL BDL BDL 10
Barium 28 27 110B 51B 42 240 68 58 67 61B 95 75 100B 100 58 55 700
Beryllium 0.54 0.64 1.8 0.92 1.2 3.6 1.6 1.7 1.6 1.5 1.8 1.9 2.4 2.9 1.4 1.6 4
Cadmium BDL 0.12 0.43 BDL 0.68 0.51 1.1 0.33 1.1 0.81 1.4 0.88 1.7 1.8 0.51 1.4 2
Chromium BDL 0.64J 6.8 0.78J BDL 17B 2.4J 1.2J 1.2J 0.59J 2.4J BDL 1.5J 4.5J 0.72J 0.73J 10
Cobalt 0.78J 0.21J 4.2BJ 1.4BJ 0.67J 8.3 1.9J 1.3J 1J 1J 1.8J 1.1J 1.8J 2.5J 1.4J 1.2J 1
Copper 1.1 0.79J 12 3.6B 2.5 23 5.7 2.9 3B 2.6B 4.7B 1.7B 6.1B 5.6 1.7 3.9 1,000
Lead 0.38J 0.12J 9.2 2.9 1.2 22 3.9 1.8 0.89J 2.2B 3.7 1.3 3.8B 3.6 0.87J 1.9 15
Nickel 0.74J BDL 4.1J 0.96J 0.71J 4.8J 1.4J 1.5J 2.3BJ 0.62J 1.4J 0.48J 1.2J 3.3J 0.83J 0.76J 100
Silver BDL BDL 0.083J 0.025BJ BDL 0.098J BDL 0.19J BDL BDL BDL 0.067BJ 0.4BJ 0.66J BDL BDL 20
Selenium BDL 0.63J 0.63J BDL 0.37J 0.33BJ BDL BDL BDL BDL BDL BDL 0.26J BDL BDL BDL 20
Thallium BDL BDL 0.49J 0.11J BDL 1 0.13J 0.096J BDL BDL 0.13J BDL 0.14J 0.15J 0.098J 0.1J 0.2
Vanadium BDL BDL 29 10B 3.2J 62 11 5.8 3.9J BDL 8.8 3.4J 8 10 1.6J 5.5B 0.3Zinc163BJ7522B1212028B24B15B11B563151762013B1,000
Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
BDL = below detection limit
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPSs) dated April 1, 2013, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
MW-23 was abandoned in accordance with NC Well Construction and Abandonment standards in October 2016, prior to construction of the Unit II Phase 2 MSW landfill.
TABLE 9HISTORICAL GROUNDWATER ANALYTICAL RESULTSMW-24GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITEPERMIT NO.: 36063155 PHILADELPHIA CHURCH ROADDALLAS, NORTH CAROLINA
Constituent (ug/1)Sampling Date NCGPS
11/08 12/08 2/09 3/09 11/09 4/10 11/10 5/11 12/11 5/12 12/12 5/13 11/13 5/14 12/14 5/15 12/15 5/16 12/16 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22 12/22
Appendix I VOCs
Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 11BJ BDL BDL BDL 4.3J 4.5J BDL BDL 2.6J 3.2J 27 8.4J BDL BDL BDL BDL BDL BDL 15J 6,000
Benzene BDL BDL BDL BDL BDL BDL 0.35J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.77J 0.59J 0.93J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1
Carbon Disulfide BDL BDL BDL BDL BDL BDL 0.21BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.4 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700
Chloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.9J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3,000
1,2-DCA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.41J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4
cis-1,2-DCA BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.55J 0.5J 0.83J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 70
4-M-2-P BDL 0.46BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100
Toluene BDL BDL BDL 0.36J BDL BDL 0.21J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.36J 14 BDL BDL 0.6J BDL BDL BDL BDL 600
Vinyl Chloride BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.55J 1.5 2.4 BDL 0.62J BDL BDL BDL 0.55J BDL BDL BDL BDL BDL BDL 0.03
1,4-Dioxane (SIM)NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3
Appendix I Metals
Antimony BDL 0.39J BDL BDL 1.6 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.27J BDL BDL BDL 0.25J BDL BDL BDL BDL BDL BDL BDL BDL 1
Arsenic BDL 0.44J 0.5J 0.81BJ 2.8 0.43J 3.5 BDL 0.8J BDL 2.3 BDL BDL BDL 1.5 BDL 0.52J 0.74J 1.1B 1.3J 1.6J BDL 0.89J 2 BDL BDL BDL BDL BDL BDL BDL 10
Barium 140 150 120B 220B 140 120 310 110 160 230 98 160B 230 120 230B 240 260 210 120B 110 130 180 120 150 230 100 100 130 170 170 120 700
Beryllium 0.65 0.7 0.45 1.4 0.87 0.32J 2.4 0.16J 0.34J 0.97 0.4 0.44 0.65 0.38J 0.63 0.54 0.79 0.61 0.45B 0.48 0.61 0.49 0.36J 1.4 0.32J 0.33J 0.35J 0.33J 0.4 0.56 0.19J 4
Cadmium 0.13 0.15 0.17 0.16 0.63 0.66 1.7 0.51 0.55 0.88 0.55 0.37 1.9 0.28 0.45 0.87 16 1.3 0.32 BDL 0.26J 1.6 0.29J 0.62 BDL 0.34J 0.32J BDL 0.52 0.61 0.24J 2
Chromium 2J 3.2J BDL 5.4 5 1J 19 BDL 0.68J 4.3J 6 2.5J 0.8J 1.4J 1.8J 1.8J 1.1J 2.2J 2.8J 2.5J 8.7 1.4J 1.5J 9.7 BDL BDL 1.7J BDL BDL BDL BDL 10
Cobalt 3.4J 3J 2.7BJ 4.9BJ 3.3J 5.5 7.3 3.1J 5.5 6.1 28 6.6 10 6.3 16 12 8.9 13 26 20 11 7.7 5.7 15 15 11 12 9.2 15 11 49 1
Copper 3.5 3.8 2.3 9B 1.5 1.1B 11 BDL 3.1 15 7.2B 7.4B 8.4B 8B 7.7B 6.5 15 5.8 3.2B 2J 4.8 1.8J 3.6J 13 BDL BDL 3.1J BDL BDL 2.5J 3.1J 1,000
Lead 4.3 4 1.7 9.8 4.4 0.77J 18 0.2J 1.1 6.3 3.5 2.5B 1.1 1.7 2.7B 1.9 2 3.6 2.8B 1.4 5 1.5 1.6J 11 BDL 0.52J 1.9 0.32J 0.65J 1.6 BDL 15
Nickel 1.4J 1.5J 1.1J 3.2J 3.1J 0.64J 3.2J 0.33J 0.77J 3.1J 5.4B 1.6J 1.8J 1.3J 2.4J 2.2J 1.5J 2.2J 4.1J 2.9J 4.4J 1.5J 3.5 5.5 1.8J 1.7J 1.9J 1.3J 2.4 1.6J 2.7J 100
Silver 0.025J BDL 0.058J 0.097BJ 0.57BJ 0.14J 1.2 0.67J 0.039BJ 0.52J 0.012J 0.12J 0.039J 0.06BJ 0.19BJ 0.35J BDL 0.36J BDL BDL BDL BDL0.097J BDL BDL BDL BDL BDL BDL BDL BDL 20
Selenium BDL 0.68J 0.5J BDL 0.25J 0.43J 0.74J 0.72BJ BDL 0.4J BDL 0.33J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Thallium 0.15J 0.15J 0.081J 0.34J 0.18J 0.11J 0.37J BDL BDL 0.31J 0.079J 0.21J 0.23J 0.19J 0.26J 0.23J 0.3J 0.3J 0.12J 0.15J 0.2J 0.22J 0.25J 0.38J 0.46J 0.24J 0.28J 0.24J 0.3J 0.38J 0.26J 2
Vanadium 6.2 8 4.2J 20 9.3 1.8J 33 BDL 3.2J 13 6.4 1.8J 3.9J 4J 7.9 3.3J 3.5J 8.1B 8.2 4.4J 8.7 4.2J 2.3 23 BDL BDL 6.8 3.4J 4.3J 8.7 BDL 7
Zinc 19 24B 13 54B 8.8J 7.2J 45 6.9J 11B 45B 18B 17B 120 49 97 23 67 14B 17 8.4J 21 8.3J 11 40B 4.8J 4.4J 7.5J BDL 6.7J 27B 4.2J 1,000
Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals.
Reference associated groundwater monitoring report for analytical methods and detection limits.
DCA = dichloroethane; 4-M-2P = 4-methyl-2-pentanone
BDL = below detection limit
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPS's) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 10
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-25
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITEPERMIT NO.: 36063155 PHILADELPHIA CHURCH ROADDALLAS, NORTH CAROLINAConstituent (ug/1)NCGPS
11/08 12/08 2/09 3/09 11/09 4/10 11/10 5/11 12/11 5/12 12/12 5/13 11/13 5/14 12/14 5/15 12/15 5/16 12/16 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22 12/22
Appendix I VOCs Acetone BDL 13 0.33J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.7J BDL BDL BDL 2J 32 2.6J BDL BDL BDL BDL BDL BDL BDL 6,000BenzeneBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL0.48J BDL BDL BDL BDL BDL BDL BDL BDL BDL 1Carbon Disulfide BDL BDL 0.16J BDL BDL BDL 0.19BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.3 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700
CT BDL 0.33J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.3
Chloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3,000
1,1-DCA BDL BDL BDL BDL BDL BDL BDL BDL 0.15J 0.2J 0.43J 0.71J 0.61J 0.48J 0.6J 0.47J 0.47J 0.35J 0.42J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6
1,2-DCA BDL BDL 0.16J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.97J BDL BDL BDL 0.78J 0.41J 0.4J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.4
1,1-DCE BDL BDL BDL BDL BDL BDL BDL BDL 1.2J BDL 0.81J 0.86J 1.2 1.2 1.1 0.26J 0.68J 0.75J 0.5J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 7cis-1,2-DCE BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.17J 0.19J 0.24J 0.4J 0.46J 0.35J 0.26J 0.44J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 704-M-2-P BDL 0.44BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100MCBDLBDLBDLBDLBDLBDLBDLBDLBDLBDLBDL0.38J BDL BDL 0.58J 0.33J BDL BDL 0.46J 0.47J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 5TetrachloroetheneBDLBDLBDLBDLBDLBDLBDLBDL0.18J 0.3J 0.5J 0.83J 0.66J 0.41J 0.62J 0.52J 0.48J 0.42J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.7
1,1,1-TCA BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.46J 0.5J 0.67J 0.51J BDL 0.26J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 200
Trichloroethene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.29J 0.43J 0.31J 0.24J 0.35J 0.36J 0.25J 0.16J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 3
TCFM BDL BDL BDL BDL BDL BDL BDL 0.33J BDL 0.81J 0.67J 1 0.68J 0.33J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2,000
Vinyl Chloride BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.54J 0.7J BDL 0.58J BDL 0.51J 0.5J 0.65J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.03
1,4-Dioxane (SIM)NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3
Appendix I Metals
Antimony BDL 0.17J BDL BDL 0.18J BDL BDL BDL 0.15J BDL BDL BDL BDL BDL BDL BDL BDL 0.2J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1
Arsenic BDL BDL BDL 0.74BJ BDL BDL BDL BDL 0.74BJ BDL BDL BDL BDL 0.54J 3.5 BDL BDL BDL BDL BDL BDL BDL 0.77J BDL BDL BDL BDL BDL BDL BDL BDL 10
Barium 22 27 27B 30B 23 31 26 30B 37 42 51 57B 58 62 59B 59 51 52 71B 59 49 59 46 47 30 15 67 38 S 24 38 34 700
Beryllium 0.07J 0.08J 0.12J 0.11J 0.05J 0.14J 0.03J 0.063J0.071J 0.092J BDL 0.089J 0.16J 0.19J BDL 0.17J 0.12J 0.22J0.32BJ0.17J BDL BDL 0.22J 0.44 0.25J BDL 0.29J 0.34J BDL 0.23J 0.27J 4
Cadmium 0.069J 0.14 0.24 0.11 1.1 0.36 2.2 0.23 0.59 0.52 0.88 0.34 0.78 0.66 0.39J 0.74 0.72 0.37 0.11 BDL BDL 0.43J0.33J BDL BDL BDL BDL 0.25J 0.14J BDL 3.4 2Chromium0.35J 1.3J 1.8J BDL 0.43J 1.6J BDL BDL BDL BDL 0.81J 0.43J 1.4J 0.7J BDL 0.66J BDL BDL 2.3J 2.7J BDL BDL 1J BDL 1.7J BDL 3.8J 1.4J BDL BDL BDL 10Cobalt0.38J 0.45J 0.48BJ0.41BJ 0.14J 0.54J 0.17J 0.25J 0.097J 0.078J0.14J 0.074J 0.32J 1.7J BDL BDL BDL 0.42J 0.87J BDL BDL 2.3J 4.3 2.2J BDL BDL 2.8J BDL BDL BDL BDL 1Copper0.95J 2.6 1.7 0.78BJ 0.37J 2.5B 0.93J BDL 0.84J 0.9J 1.3B 1.9B 1.7B 16B 4.9BJ 1 0.6J 1.9B 2B 0.94J BDL 2.9J 0.68J BDL 1.3J BDL 4.6J 1.4J BDL BDL 1.3J 1,000Lead0.24J 0.44J 0.56J 0.43J 0.25J 0.72J 0.15J BDL 0.074J 0.072J0.12J 0.18BJ 0.15J 0.7J 0.31BJ0.46J BDL 0.24J 1.1B BDL BDL BDL 0.47J 0.32J 1 BDL 3 1.1 0.36J 0.57J 0.36J 15
Nickel 0.56J 0.81J 0.51J 0.38J BDL 0.79J 0.31J BDL BDL 0.32J 1.3BJ BDL 0.85J 0.92J BDL 0.74J 0.74J BDL 2.3J BDL BDL BDL 2.8J BDL BDL BDL 2.3J BDL BDL BDL BDL 100
Selenium BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.54J BDL BDL BDL 0.26J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Silver BDL BDL 0.05J .053BJ0.55BJ0.15J BDL 0.032J0.04BJ 0.16J BDL BDL BDL .022BJ.085BJ0.32J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Thallium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.2J BDL BDL BDL BDL 2Vanadium2.4J 3.4J 4.8J 4.5BJ 2J 4.8J 1.7J 2.3J 2.5J 1.7J 1.8J BDL 2J 5.2 BDL 2.2J 1.6J 3.4BJ 9.2 2.2J 2.5J 2.9J BDL BDL 4.6J BDL 14 6.4 3.3J BDL BDL 7Zinc6J9.8BJ 11 6.8BJ 3.9J 10 4.4J BDL 5.2J 5.8J 8.8BJ 6.1BJ 35 30 28J 7.2J 14 15B 27 4.5J 3.9J 8J 8.2J 6.5BJ 7J BDL 27 7.5J 4.5J 4BJ 4.2J 1,000
Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
CT = carbon tetrachloride; DCA = dichloroethane; DCE = dichloroethene; MC = methylene chlorode; TCA = trichloroethane; M-P = methyl - pentanone; TCFM = trichlorofluouromethane; BDL = below detection limit
NCGPS = North Carolina Groundwater Protection Standard; bold and shade denotes above NCGPS; data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPS's) dated April 1, 2022, J-flagged groundwater data exceeding the standard does not constitute an exceedance).
Sampling Date
TABLE 11
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-26
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITEPERMIT NO.: 36063155 PHILADELPHIA CHURCH ROADDALLAS, NORTH CAROLINA
Constituent (ug/1)Sampling Date NCGPS
11/08 12/08 2/09 3/09 11/09 4/10 11/10 5/11 12/11 5/12 12/12 5/13 11/13 5/14 12/14 5/15 12/15 5/16 12/16 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22 12/22
Appendix I VOCs
Acetone BDL 14 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6.7BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 6,000
Carbon Disulfide BDL BDL 0.16J BDL BDL BDL 0.24BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700
4-M-2-P BDL 0.44BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100
1,4-Dioxane (SIM)NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3
Appendix I Metals
Antimony BDL BDL BDL BDL 1.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.64J BDL BDL BDL 1
Arsenic BDL BDL BDL 0.74BJ BDL BDL BDL BDL 1.1B BDL BDL BDL BDL 0.37J 2.6J BDL BDL BDL BDL BDL BDL BDL 0.28J BDL BDL BDL BDL BDL BDL BDL BDL 10
Barium 140 37 23B 31B 42 39 41 20B 51 17 20 23B 40 19 17B 23 23 13 26B 10 13 19 22 16 29 28 25 64 61 41 86 700
Beryllium 2.5 0.33J 0.083J 0.17J 0.27J 0.25J 0.41 0.12J 0.3J 0.13J BDL 0.16J 0.2J 0.15J BDL 0.32J 0.18J 0.19J 0.56BBDL 0.15J0.24J 0.18J 0.18J 0.2J 0.2J 0.18J 0.31J 0.29J 0.16J 0.24J 4
Cadmium 0.55 0.11 0.075J 0.089J 0.3 0.17 1.5 0.082J 0.8 0.41 1.4 0.2 0.45 0.8 1.3 0.43 0.55 0.24 0.098JBDL BDL 0.27J 0.29J 0.26J 0.65 0.2J BDL 0.68 2.1 0.13J 0.19J 2
Chromium 11 3.1J BDL BDL 1.6J 1.7J 1.9J BDL 2.8J 0.84J 2J 1.6J 2J 0.67J 3.1J 2.2J 2J 0.85J 2.9J BDL 1.4J 1.9J 4.5 2.2J BDL BDL 1.3J 3J BDL BDL 3.9J 10
Cobalt 8.3 1.6J 0.44BJ0.78BJ 1.1J 0.77J 1.2J 0.26J 1.5J 0.22J 0.5J 0.58J 4.1J 0.62J 0.43J 1.1J 0.7J 0.29J 1.1J BDL BDL 1.9J 0.46J BDL BDL 2.4J BDL BDL BDL BDL BDL 1
Copper 9 2 0.66J 0.97BJ 3.1 1B 2.8 BDL 2.2 0.72J 3B 1.5B 4.2B 1.3B 1.2BJ 2.4 1.8 1B 1.9B BDL 0.75J 2.2J 1.1J BDL BDL 1.3J BDL BDL BDL BDL 1.9J 1,000
Lead 17 2.5 0.51J 0.95J 1.3 1.1 2.1 0.3J 1.5 0.34J 0.59J 1B 0.92J 0.56J 0.6BJ 1.3 0.75J 0.86J 2.3B 0.36J 0.56J0.81J 0.55J 0.61J 0.4J BDL 0.54J BDL 0.38J BDL 0.32J 15
Nickel 5.4 1.3J 0.5J 0.5J 1.1J 0.65J 1.1J BDL 1.5J 0.41J 1.1BJ 0.66J 1.1J 0.57J BDL 1.1J 1J 0.67J 1.8J BDL BDL BDL 2.1J BDL BDL BDL BDL BDL BDL BDL BDL 100
Selenium BDL BDL BDL BDL BDL BDL BDL 0.44BJ BDL BDL BDL BDL BDL 0.3J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Silver 0.1J BDL BDL .055BJ0.16BJ0.024J BDL BDL BDL 0.13J BDL BDL0.012J BDL 0.24BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Thallium 0.2J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2
Vanadium 38 8.9 3.4J 4.8BJ 6.9 4.6J 6.3 2.9J 9.9 2.7J 3.9J BDL 7 3.6J BDL 4.9J 5 4.4BJ 11 3.1J 3.1J 3.5J 2.4 3.1J BDL BDL 2.8J BDL BDL BDL BDL 7
Zinc 78 19B 7.2J 11B 17 10 18 2.8J 23 6.2J 11B 8.7BJ 30 11 12J 13 13 8.5BJ 18 3.5J 5J 10 18 9.2BJ 4.4J 3.3J 5.5J 3.9J 5.7J 4.1BJ 5.9J 1,000

Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
M-P = methyl-pentanone; BDL = below detection limit
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPS's) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 12HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-27GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 36063155 PHILADELPHIA CHURCH ROADDALLAS, NORTH CAROLINA
Constituent (ug/1)Sampling Date NCGPS
11/08 12/08 2/09 3/09 5/13 11/13 5/14 12/14 5/15 12/15 5/16 12/16 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22 12/22
Appendix I VOCs
Acetone BDL BDL BDL BDL BDL BDL BDL BDL BDL 2.3J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 5.1JL BDL 6,000
Carbon Disulfide BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.65J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 700
4-Methyl-2-Pentanone BDL 0.42BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 100
1,4-Dioxane (SIM)NT NT NT NT NT NT NT NT NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3
Appendix I Metals
Antimony BDL BDL BDL BDL 0.12J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.5J BDL BDL BDL BDL 1
Arsenic 1.5J BDL 0.32J 0.45BJ BDL BDL BDL 2.5J BDL BDL BDL BDL BDL BDL BDL 0.21J BDL BDL BDL BDL BDL BDL BDL BDL 10
Barium 780 46 62B 88B 150B 53 68 76B 84 87 55 110B 110 170 31 19 54 45 24 27 27 31 63 56 700
Beryllium 4.8 0.078J 0.36J 0.49 1.2 0.34J 0.66 0.47J 0.84 0.86 0.56 0.63B 0.53 1.3 0.26J 1.8J 0.67 0.39J 0.22J 0.28J 0.27J 0.21J 0.44 0.44 4
Cadmium 3.2 0.093J 0.2 0.12 0.37 0.4 0.51 0.6 3.4 BDL 0.15 0.092J BDL BDL BDL 0.71J 0.14J 0.27J BDL 0.29J 0.4J BDL 0.13J BDL 2
Chromium 50 1.2J 7 4.5J 7.3 1.5J 1.8J 4.2J 4.1J 4.2J 2.1J 4.3J 1.7J 7.2 3.1J 1.9J 7.1 2.7J BDL 1.6J BDL BDL BDL BDL 10
Cobalt 28 1 1BJ 2.3BJ 2.7J 0.57J 0.71J 1.1J 1.5J 1.9J 0.77J 1.2J BDL 2.4J BDL 0.23J 1.3J BDL BDL BDL BDL BDL BDL BDL 1
Copper 42 1.3 1.2 3.9B 6.1B 1.5B 1.6B 2.9BJ 1.4 2.7B 2.5B 3.1B 1.5J 2.9 1.4J 0.89J 3.3J BDL BDL BDL BDL BDL BDL BDL 1,000
Lead 50 0.52J 0.69J 2.9 5.7B 0.84J 1.3 1.7BJ 2.8 3.3J 1.2 2.4B 1 6.3 0.87J 0.38J 2.8 0.91J BDL 0.58J BDL BDL 0.34J 0.41J 15
Nickel 20 2.4J 1.3J 2.4J 2.7J 0.79J 0.82 BDL 1.6J 1.7J 0.87J 2.6J BDL 2.8J BDL 55 1.5 BDL BDL BDL BDL BDL BDL BDL 100
Silver 0.14J BDL 0.023J 0.52BJ 0.011J BDL BDL 0.1BJ 1.1 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Selenium BDL BDL 1.3 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 20
Thallium 3.3 BDL BDL 0.2J 0.4J BDL 0.082J BDL 0.17J BDL 0.12J 0.19J BDL 0.32J BDL BDL 0.18J BDL BDL BDL BDL BDL BDL BDL 2
Vanadium 150 2.4J 4J 13B 17 3.1J 5.7 BDL 10 12 5.7B 13 3.9J 19 2.7J BDL 8.8 2.6J BDL BDL BDL BDL BDL BDL 7
Zinc 440 9.8BJ 10 33B 51B 31 34 43J 25 46J 21B 42 9.5J 49 7.5J 15 25B 7.6J BDL 6.2J BDL BDL 3.6BJ 2.7J 1,000

Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
BDL = below detection limit
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPSdata presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPSs) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 13
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-28
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
MW-28 Sampling Date NCGPS
Constituents (ug/1)2/8/17 2/16/17 2/24/17 3/13/17 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22
Appendix I VOCs
Acetone 3.3J BDL BDL BDL BDL BDL 2.1J BDL BDL BDL BDL BDL BDL BDL 5.4JL 6,000
Benzene BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.41J BDL 0.89J 1
1,2-Dichloroethane BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.49J 0.4
cis-1,2-Dichloroethene BDL BDL BDL BDL BDL BDL BDL 0.27J BDL BDL 0.57J 0.51J 0.64J 0.68J 1.2 70
1,4-Dioxane (SIM)NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT 3
Appendix I Metals
Antimony 0.72BJ 0.72BJ 0.56J 0.65J BDL BDL BDL 0.19J BDL BDL BDL BDL BDL BDL BDL 1
Arsenic 0.94 1.4 BDL BDL BDL BDL BDL 0.32J BDL BDL BDL BDL BDL BDL BDL 10
Barium 24 35 18 22 27 18 12 13 8 9.6 9.9 12 16 19 23 700
Beryllium 0.15J 0.23J BDL 0.19J 0.22J 0.19J BDL 0.082J BDL BDL BDL 0.16J BDL 0.17J BDL 4
Cadmium 0.074J 0.067J BDL BDL BDL BDL BDL 0.46J 0.15J 0.45J BDL 0.22J 0.38J 0.21J 1.7 2
Chromium 4.2J 33 5.8 5 14 7.5 1.6J 0.71J BDL BDL BDL BDL BDL BDL BDL 10
Cobalt 0.6J 2.2J BDL BDL 1J 0.67J BDL 0.2J BDL BDL BDL BDL BDL BDL BDL 1
Copper 5.2 11 4J 5.1 6.3 4.1J 1.8J 1.7J BDL 1.3J BDL 1.3J 1.8J 2J 1.5J 1,000
Lead 3.5B 6.8 2.3 3.3 4.2 2.7 0.66J 0.37J 0.53J BDL BDL 0.4J 0.38J 0.64J BDL 15
Nickel 1.3J 7.3 4J 4.4J 7.2 4.1J BDL 3.5 BDL BDL BDL BDL BDL BDL BDL 100
Thallium 0.088BJ 0.19J BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 2
Vanadium 6.6 14 5 7.6 8 5.3 BDL BDL BDL BDL BDL BDL BDL BDL BDL 7
Zinc 13B 34 13 17 16 10 6.8J 15 6.2BJ 4.3J 3.5J 6.3J 8.3J 8.6J 5.9BJ 1,000

Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
BDL = below detection limit; NA = not applicable
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPSs) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 14
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-29
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
MW-29 Sampling Date NCGPS
Constituents (ug/1)2/8/17 2/16/17 2/24/17 3/13/17 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22
Appendix I VOCs
Acetone 3.7J BDL BDL BDL BDL BDL 3.9J BDL 2J BDL BDL BDL BDL BDL BDL 6,000
1,4-Dioxane (SIM)NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT 3
Appendix I Metals
Antimony 0.19BJ 0.25BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.78J BDL BDL BDL 1
Arsenic BDL 0.5J BDL BDL BDL BDL 1.4J 0.36J BDL BDL BDL BDL BDL BDL BDL 10
Barium 29 30 29 32 38 42 62 79 50 68 52 75 54 55 61 700
Beryllium 0.17J 0.18J 0.2J 0.2J 0.2J 0.27J 0.7 0.75J 0.35J 0.84 0.22J 0.97 0.34J 0.29J 0.36J 4
Cadmium BDL 0.05J BDL BDL BDL BDL 0.26J BDL BDL 0.14J 0.14J BDL 0.93 BDL 0.16J 2
Chromium BDL BDL BDL BDL BDL BDL 2.4J 0.58J 1.4J BDL BDL BDL BDL BDL BDL 2
Cobalt BDL 0.4J BDL BDL BDL BDL BDL 1.4 BDL BDL BDL BDL BDL BDL BDL 1
Copper 0.25J 0.36J BDL BDL BDL 0.72J 3.6J 0.66J BDL 1.3J BDL 1.4J BDL BDL BDL 1,000
Lead 0.24BJ 0.26J BDL 0.33J 0.51J 0.38J 4.5 0.18J 0.47J 0.83J BDL 0.69J BDL BDL BDL 15
Nickel BDL BDL BDL BDL BDL BDL BDL 2J BDL BDL BDL BDL BDL BDL BDL 100
Thallium BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 0.15J BDL BDL 2
Vanadium BDL BDL BDL BDL BDL 2.8J 6 BDL BDL BDL BDL BDL BDL BDL BDL 7
Zinc 2.2BJ 2J BDL BDL 3J 6.2J 13 6J 5.7BJ 4.9J 2.7J 6.2J BDL 2.6J 3.1BJ 1,000

Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
BDL = below detection limit; NA = not applicable
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPSs) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 15
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-30
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
MW-30 Sampling Date NCGPS
Constituents (ug/1)2/8/17 2/16/17 2/24/17 3/13/17 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22
Appendix I VOCs
Acetone BDL BDL BDL BDL BDL BDL 2.4J BDL BDL BDL BDL BDL BDL BDL BDL 6,000
1,4-Dioxane (SIM)NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT 3
Appendix I Metals
Antimony 0.17BJ 0.21BJ BDL BDL BDL BDL BDL BDL BDL BDL 0.5J BDL BDL BDL BDL 1
Arsenic 0.26J BDL BDL BDL BDL BDL BDL 0.22J BDL BDL BDL BDL BDL BDL BDL 10
Barium 66 63 62 69 95 120 110 65 58 70 61 66 69 77 71 700
Beryllium 0.41 0.36J 0.37J 0.38J 1.1 1.2 0.6 0.43J 0.43 0.56 0.45 0.59 0.42 0.5 0.44 4
Cadmium 0.048J 0.061J BDL BDL BDL BDL BDL 0.45J BDL BDL 0.23J BDL BDL 0.2J BDL 2
Chromium 0.84J BDL 1.9J BDL 3J 2.8J 3.7J 0.82J 1.5J 1.3J BDL BDL BDL BDL BDL 10
Cobalt 1J 0.53J BDL BDL 2J 2.5J 3.2J 0.4J BDL BDL BDL BDL BDL BDL BDL 1
Copper 0.47J 0.35J BDL 0.78J 2.6J 2.5J 3.6J 0.78J BDL BDL BDL BDL BDL BDL BDL 1,000
Lead 1.3B 0.45J 0.27J 0.95J 8.4 11 6.6 0.87J BDL 2.2 BDL 0.4J BDL 1.4 BDL 15
Nickel 1J BDL BDL 1.3J 1.5J 1.5J 2J 1.7J BDL BDL 0.34J BDL BDL BDL BDL 100
Thallium BDL BDL BDL BDL 0.18J 0.2J 0.26J BDL BDL BDL BDL BDL BDL BDL BDL 2
Vanadium 2.2J BDL BDL 2.2J 11 13 17 0.54J BDL 3.3J BDL BDL BDL BDL BDL 7Zinc13B6.5J 7.2J 9.3J 26 34 BDL 13 9.6BJ 11 5.7J 6.4J 6.2J 9.7J 6.6BJ 1,000

Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
BDL = below detection limit; NA = not applicable
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPSs) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 16
HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-31
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMIT NO.: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA
MW-31 Sampling Date NCGPS
Constituents (ug/1)2/8/17 2/16/17 2/24/17 3/13/17 7/17 12/17 6/18 12/18 6/19 12/19 8/20 12/20 8/21 12/21 8/22 12/22
Appendix I VOCs BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL NA
1,4-Dioxane (SIM)NT NT NT NT NT NT NT BDL BDL BDL NT NT NT NT NT NT 3
Appendix I Metals
Antimony 0.31BJ BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL 1
Arsenic BDL 0.4J BDL BDL BDL BDL BDL 3.6 BDL BDL BDL BDL BDL BDL BDL BDL 10
Barium 250 240 240 230 220 280 220 620 240 230 200 230 240 250 230 200 700
Beryllium 0.45 0.46 0.45 0.52 0.37J 0.89 0.48 2.5 0.69 0.46 0.37J 0.69 0.53 0.48 0.51 0.47 4
Cadmium 0.079J 0.069J BDL BDL BDL BDL 0.28J 0.1J BDL BDL BDL 0.15J 0.16J 0.61 0.17J 0.3J 2
Chromium 1.9J 2J 4.2J BDL BDL 4.7J 2.5J 15 2.8J BDL BDL 1.4J BDL BDL BDL BDL 10
Cobalt 2.3J 1.6J 1.6J 1.1J 0.7J 1.4J 1.3J 5.6 BDL BDL BDL BDL BDL BDL BDL BDL 1
Copper 0.48J 0.71J 0.98J 0.68J 0.77J 5.1 4.7J 44 3.4J 1.4J BDL 2.3J BDL BDL BDL 2.4J 1,000
Lead 0.57BJ 0.75J 0.92J 0.63J 0.71J 7.7 3.9 25 3.1 1.3 BDL 2.5 BDL 1.2 BDL BDL 15
Nickel 2.3J 1.4J 2.1J 1.9J BDL 2.6J BDL 5.2 BDL BDL BDL BDL BDL BDL BDL BDL 100
Selenium BDL BDL BDL BDL BDL BDL BDL 3.9J BDL BDL BDL BDL BDL BDL BDL BDL 20
Thallium 0.29BJ 0.18J 0.21J 0.24J 0.19J 0.28J 0.28J 0.77J 0.26J 0.2J 0.17J 0.23J 0.22J 0.21J 0.18J 0.15J 2
Vanadium BDL 1.7J 2.4J BDL BDL 8 7.3 38 4.5J BDL BDL 3.7J BDL BDL BDL BDL 7Zinc12B11129.8J 8.9J 24 24 79 22B 10 7.4J 16 4J 11 3.9BJ 3.7J 1,000

Notes:
Groundwater samples collected on above listed dates and analyzed for Appendix I VOCs and metals by
Shealy Environmental Services, Inc.
Reference associated groundwater monitoring report for analytical methods and detection limits.
BDL = below detection limit; NA = not applicable
NCGPS = North Carolina Groundwater Protection Standard
bold and shade denotes above NCGPS
data presented in micrograms per liter (ug/l)
B = detected in method blank
J = estimated result <PQL and >=MDL (According to NCAC Title 15A Subchapter 2L North Carolina Groundwater Quality
Standards (primary standard used to establish NCGPSs) dated April 1, 2022, J-flagged groundwater data exceeding the
standard does not constitute an exceedance).
TABLE 17
STATISTICAL EVALUATION OF HISTORICAL GROUNDWATER MONITORING DATA
SECOND SEMI-ANNUAL 2022
GASTON COUNTY UNIT II PHASE 1 & 2 LINED SUBTITLE D LANDFILL - HARDIN SITE
PERMITNO: 3606
3155 PHILADELPHIA CHURCH ROAD
DALLAS, NORTH CAROLINA

Monitor Well ID Kruskal-Wallis Test (ANOVA)
MW-24 Barium, Cobalt, Lead
MW-25 Barium
MW-26 No Statistical Significance
MW-27 Barium
MW-31 Barium
Notes:
Statistical evaluation activities were conducted utilizing Grits/Stat v4.2
These activities were conducted to determine if historical groundwater constituents detected at
downgradient compliance wells MW-24, MW-25, MW-26, MW-27, MW-28, MW-29, MW-30 and MW-31
were statistically above groundwater data collected at upgradient background well MW-1 (utilized historical data
and MW-1-B collected on February 21, 2017 for the second semi-annual 2017 event).
ANOVA = analyses of variance
Monitor wells MW-28, MW-29 & MW-30 were approved to be abandoned by the NCSWS on October 26, 2022, therfore, were not monitored.
The abandonment by overdrilling was conducted from November 14, 2022 to January 13, 2023 prior to construction of Unit III MSW landfill.
rk:table:GastonUnitIIStat.1222

APPENDIX A
NCSWS Memorandums – PFAS Monitoring – March 13, 2023 and July 17, 2023

APPENDIX B
Laboratory Data Sheets
The electronic signature above is the equivalent of a handwritten signature.
This report shall not be reproduced,except in its entirety,without the written approval of Pace Analytical Services,LLC.
Pace Analytical Services,LLC (formerly Shealy Environmental Services,Inc.)
106 Vantage Point Drive West Columbia,SC 29172
Tel:[phone] Fax:[phone] www.pacelabs.com
Report of Analysis
Buxton Environmental
PO Box 11550
Charlotte,NC 28220
Attention:Ross Klingman
Project Name:Gaston Co Unit II MSW Landfill-Hardin Site
Project Number:3606
Lot Number:XL31002
Date Completed:01/12/2023
Revision Date:09/20/2023
09/25/2023 5:52 PM
Approved and released by:
Project Manager II:Cathy S.Dover
Page 1 of 104
PACE ANALYTICAL SERVICES,LLC
SC DHEC No:32010001 NELAC No:E87653 NC DENR No:329 NC Field Parameters No:5639
Pace Analytical Services,LLC (formerly Shealy Environmetal Services,Inc.)
106 Vantage Point Drive West Columbia,SC 29172 [phone] Fax [phone] www.pacelabs.com
Case Narrative
Buxton Environmental
Lot Number:XL31002
Report Revision:Per client,this report has been revised to update the element list for samples
MW-12 (XL31002-012),MW-13 (XL31002-013)and MW-14 (XL31002-014).They were inadvertently
reported as same list as the metals on the other COC/sample received and now are reported with
only RCRA metals (minus Hg).This report supersedes and replaces any prior reports issued
under this lot number.
This Report of Analysis contains the analytical result(s)for the sample(s)listed on the Sample Summary
following this Case Narrative.The sample receiving date is documented in the header information
associated with each sample.
All results listed in this report relate only to the samples that are contained within this report.Where
sampling is conducted by the client,results relate to the accuracy of the information provided,and as the
samples are received.
Sample receipt,sample analysis,and data review have been performed in accordance with the most
current approved The NELAC Institute (TNI)standards,the Pace Analytical Services,LLC ("Pace")
Laboratory Quality Manual,standard operating procedures (SOPs),and Pace policies.Any exceptions to
the TNI standards,the Laboratory Quality Manual,SOPs or policies are qualified on the results page or
discussed below.
Pace is a TNI accredited laboratory;however,the following analyses are currently not listed on our TNI
scope of accreditation:Drinking Water:VOC (excluding BTEX,MTBE,Naphthalene,&1,2-
dichloroethane)EPA 524.2,E.coli and Total coliforms SM 9223 B-2004,Solid Chemical Material:TOC
Walkley-Black,Biological Tissue:All,Non-Potable Water:SGT-HEM EPA 1664B,Silica EPA 200.7,
Boron,Calcium,Silicon,Strontium EPA 200.8,Bicarbonate,Carbonate,and Hydroxide Alkalinity SM 2320
B-2011,SM 9221 C E-2006 &SM 9222D-2006,Strontium SW-846 6010D,VOC SM 6200 B-2011,Fecal
Coliform Colilert-18.
VOA 8260D
Insufficient sample volume was provided to perform matrix spike/matrix spike duplicate (MS/MSD)for
analytical batch 64266.An LCS/LCSD was run in lieu of an MS/MSD.Associated samples:
XL31002-001 (MW-1)(Run 1)(Analysis Batch 64266)
XL31002-002 (MW-24)(Run 1)(Analysis Batch 64266)
XL31002-003 (MW-25)(Run 1)(Analysis Batch 64266)
XL31002-004 (MW-26)(Run 1)(Analysis Batch 64266)
XL31002-005 (MW-27)(Run 1)(Analysis Batch 64266)
XL31002-006 (MW-31)(Run 1)(Analysis Batch 64266)
XL31002-007 (US-1)(Run 1)(Analysis Batch 64266)
XL31002-008 (DS-1)(Run 1)(Analysis Batch 64266)
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 64266)
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 64266)
XL31002-011 (Equipment Blank)(Run 1)(Analysis Batch 64266)
XL31002-012 (MW-12)(Run 1)(Analysis Batch 64266)
XL31002-013 (MW-13)(Run 1)(Analysis Batch 64266)
XL31002-014 (MW-14)(Run 1)(Analysis Batch 64266)
Page 2 of 104
PACE ANALYTICAL SERVICES,LLC
SC DHEC No:32010001 NELAC No:E87653 NC DENR No:329 NC Field Parameters No:5639
Pace Analytical Services,LLC (formerly Shealy Environmetal Services,Inc.)
106 Vantage Point Drive West Columbia,SC 29172 [phone] Fax [phone] www.pacelabs.com
The following samples was received with an air bubble in the sample vials:XL31002-009 and XL31002-
010.
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 64266)
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 64266)
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 64266)
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 64266)
The initial calibration verification (ICV)associated with samples XL31002-001,XL31002-002,XL31002-
003,XL31002-004,XL31002-005,XL31002-006,XL31002-007,XL31002-008,XL31002-009,XL31002-
010,XL31002-011,XL31002-012,XL31002-013,and XL31002-014 exceeded control criteria for analyte:
2-hexanone (133%).The data has been reported.
The initial calibration verification (ICV)associated with samples XL31002-001,XL31002-003,XL31002-
004,XL31002-005,XL31002-006,XL31002-007,XL31002-008,XL31002-011,XL31002-012,XL31002-
013,XL31002-014 exceeded control criteria for analytes:Acetone (123%).The data has been reported.
XL31002-001 (MW-1)(Run 1)(Analysis Batch 64266)
XL31002-003 (MW-25)(Run 1)(Analysis Batch 64266)
XL31002-004 (MW-26)(Run 1)(Analysis Batch 64266)
XL31002-005 (MW-27)(Run 1)(Analysis Batch 64266)
XL31002-006 (MW-31)(Run 1)(Analysis Batch 64266)
XL31002-007 (US-1)(Run 1)(Analysis Batch 64266)
XL31002-008 (DS-1)(Run 1)(Analysis Batch 64266)
XL31002-011 (Equipment Blank)(Run 1)(Analysis Batch 64266)
XL31002-012 (MW-12)(Run 1)(Analysis Batch 64266)
XL31002-013 (MW-13)(Run 1)(Analysis Batch 64266)
XL31002-014 (MW-14)(Run 1)(Analysis Batch 64266)
The laboratory control sample (LCS)and laboratory control sample duplicate (LCSD)for analytical batch
64266 exceeded acceptance criteria for the following analytes:Acetone,2-butanone,1,4-dioxane and 2-
hexanone.These analytes were biased high and were not detected in the associated samples,or below
the LOQ:XL31002-001,XL31002-002,XL31002-003,XL31002-004,XL31002-005,XL31002-006,
XL31002-007,XL31002-008,XL31002-009,XL31002-010,XL31002-011,XL31002-012,XL31002-013,
and XL31002-014.The RPD for trans-1,4-Dichloro-2-butene was >20%.
XL31002-001 (MW-1)(Run 1)(Analysis Batch 64266)
XL31002-002 (MW-24)(Run 1)(Analysis Batch 64266)
XL31002-003 (MW-25)(Run 1)(Analysis Batch 64266)
XL31002-004 (MW-26)(Run 1)(Analysis Batch 64266)
XL31002-005 (MW-27)(Run 1)(Analysis Batch 64266)
XL31002-006 (MW-31)(Run 1)(Analysis Batch 64266)
XL31002-007 (US-1)(Run 1)(Analysis Batch 64266)
XL31002-008 (DS-1)(Run 1)(Analysis Batch 64266)
XL31002-011 (Equipment Blank)(Run 1)(Analysis Batch 64266)
XL31002-012 (MW-12)(Run 1)(Analysis Batch 64266)
XL31002-013 (MW-13)(Run 1)(Analysis Batch 64266)
XL31002-014 (MW-14)(Run 1)(Analysis Batch 64266)
Page 3 of 104
PACE ANALYTICAL SERVICES,LLC
SC DHEC No:32010001 NELAC No:E87653 NC DENR No:329 NC Field Parameters No:5639
Pace Analytical Services,LLC (formerly Shealy Environmetal Services,Inc.)
106 Vantage Point Drive West Columbia,SC 29172 [phone] Fax [phone] www.pacelabs.com
Insufficient sample volume was provided to perform matrix spike/matrix spike duplicate (MS/MSD)for
analytical batch 64265.An LCS/LCSD was run in lieu of an MS/MSD.Associated sample:XL31002-015
(FD-1)(Run 1)(Analysis Batch 64265)
Sample XL31002-009 (Leachate-Unit 2 ph1)had a pH of 5 when pH was taken at analysis time.
The LCS/LCSD RPD for 1,4-dioxane in batch 64265 was >20%,but spike recovery was in control limits.
The MS/MSD for batch 64266 and parent sample XL31002-010 (Leachate-Unit 2 ph2),recovered outside
the lower control limit for Acetone.The associated LCS passed acceptance criteria.
The continuing calibration verification (CCV)associated with analytical batch 64265 recovered outside
acceptance criteria,low biased,for Vinyl acetate (-25%).An LOQ standard was analyzed,and the target
analyte was detected.Since the associated sample,XL31002-015 was non-detect,no corrective action
was taken.
XL31002-015 (FD-1)(Run 1)(Analysis Batch 64265)Full list VOCs (with total and separate xylenes,total
ICP Metals 6020B
The following samples were diluted due to the nature of the sample matrix:XL31002-009 and XL31002-
010.The LOQ has been elevated to reflect the dilution.
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 64284)(Prep Batch 63980)ICP-MS Metals
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 64284)(Prep Batch 63980)ICP-MS Metals
Nitrate 353.2
The following samples:XL31002-009 and XL31002-010 (Leachate-Unit 2 ph2)were associated with
analytical batch 63954 that had a LCS that recovered outside XL31002-009 (Leachate-Unit 2 ph1)of
acceptable range,samples were scheduled for a reanalysis.The reanalysis of the samples was
performed outside of the analytical holding time,but this analysis confirmed the original results within 20%
RPD.The original analysis has been reported.
Orthophosphate 365.1
According to the method,orthophosphate samples must be filtered within 15 minutes of collection.No
information was provided stating that the samples in this batch were filtered to meet this requirement.
Therefore,the samples were filtered during sample preparation prior to analysis.Data has been
reported.Associated samples:
XL31002-009 (Leachate-Unit 2 ph1)and XL31002-010 (Leachate-Unit 2 ph2)
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 63953)Orthophosphate
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 63953)Orthophosphate
The limit of quantitation (LOQ)check standard for orthophosphate analytical batch 63953 did not recover
within recovery criteria.The affected samples XL31002-009 and XL31009-010 should be considered
biased high.The samples were reanalyzed and results confirmed.The original in holding time analysis
has been reported.
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 63953)Orthophosphate
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 63953)Orthophosphate
Page 4 of 104
PACE ANALYTICAL SERVICES,LLC
SC DHEC No:32010001 NELAC No:E87653 NC DENR No:329 NC Field Parameters No:5639
Pace Analytical Services,LLC (formerly Shealy Environmetal Services,Inc.)
106 Vantage Point Drive West Columbia,SC 29172 [phone] Fax [phone] www.pacelabs.com
The MS/MSD for batch 63953 and parent sample XL31002-010 (Leachate-Unit 2 ph2),recovered outside
the lower control limit.The associated LCS passed acceptance criteria.The MS/MSD RPD was >20%.
BOD
For samples XL31002-009 and XL31002-010,QC bottles 1,2 and 4-10 for BOD_63955 were recorded
with initial DO values below the criteria minimum of 8.56 mg/L for setup procedure.
XL31002-009 (Leachate-Unit 2 ph1)(Run 1)(Analysis Batch 63955)BOD,5 day
XL31002-010 (Leachate-Unit 2 ph2)(Run 1)(Analysis Batch 63955)BOD,5 day
If you have any questions regarding this report,please contact the Pace Project Manager listed on the
cover page.
Page 5 of 104
PACE ANALYTICAL SERVICES, LLC
Sample Summary
Buxton Environmental
Lot Number: XL31002

Project Name: Gaston Co Unit II MSW Landfill-Hardin Site
Project Number: 3606
Sample Number Sample ID Matrix Date Sampled Date Received
001 12/29/2022 1430MW-1 Aqueous 12/31/2022
002 12/30/2022 1100MW-24 Aqueous 12/31/2022
003 12/30/2022 1000MW-25 Aqueous 12/31/2022
004 12/29/2022 1600MW-26 Aqueous 12/31/2022
005 12/29/2022 1530MW-27 Aqueous 12/31/2022
006 12/29/2022 1500MW-31 Aqueous 12/31/2022
007 12/29/2022 1145US-1 Aqueous 12/31/2022
008 12/30/2022 1330DS-1 Aqueous 12/31/2022
009 12/30/2022 1030Leachate-Unit 2 ph1 Aqueous 12/31/2022
010 12/30/2022 1115Leachate-Unit 2 ph2 Aqueous 12/31/2022
011 12/30/2022 1535Equipment Blank Aqueous 12/31/2022
012 12/29/2022 1215MW-12 Aqueous 12/31/2022
013 12/29/2022 1330MW-13 Aqueous 12/31/2022
014 12/29/2022 1245MW-14 Aqueous 12/31/2022
015 12/30/2022 1145FD-1 Aqueous 12/31/2022
(15 samples)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 6 of 104
PACE ANALYTICAL SERVICES, LLC
Detection Summary
Buxton Environmental
Lot Number: XL31002

Project Name: Gaston Co Unit II MSW Landfill-Hardin Site
Project Number: 3606
Sample Sample ID Matrix Parameter Method Result Q Units Page
001 MW-1 Aqueous Barium 6020B 12 ug/L 13
002 MW-24 Aqueous Acetone 8260D 15 J ug/L 14
002 MW-24 Aqueous cis-1,2-Dichloroethene 8260D 0.43 J ug/L 14
002 MW-24 Aqueous Barium 6020B 120 ug/L 16
002 MW-24 Aqueous Beryllium 6020B 0.19 J ug/L 16
002 MW-24 Aqueous Cadmium 6020B 0.24 J ug/L 16
002 MW-24 Aqueous Cobalt 6020B 49 ug/L 16
002 MW-24 Aqueous Copper 6020B 3.1 J ug/L 16
002 MW-24 Aqueous Nickel 6020B 2.7 J ug/L 16
002 MW-24 Aqueous Thallium 6020B 0.26 J ug/L 16
002 MW-24 Aqueous Zinc 6020B 4.2 J ug/L 16
003 MW-25 Aqueous Barium 6020B 34 ug/L 19
003 MW-25 Aqueous Beryllium 6020B 0.27 J ug/L 19
003 MW-25 Aqueous Cadmium 6020B 3.4 ug/L 19
003 MW-25 Aqueous Copper 6020B 1.3 J ug/L 19
003 MW-25 Aqueous Lead 6020B 0.36 J ug/L 19
003 MW-25 Aqueous Zinc 6020B 4.2 J ug/L 19
004 MW-26 Aqueous Barium 6020B 86 ug/L 22
004 MW-26 Aqueous Beryllium 6020B 0.24 J ug/L 22
004 MW-26 Aqueous Cadmium 6020B 0.19 J ug/L 22
004 MW-26 Aqueous Chromium 6020B 3.9 J ug/L 22
004 MW-26 Aqueous Copper 6020B 1.9 J ug/L 22
004 MW-26 Aqueous Lead 6020B 0.32 J ug/L 22
004 MW-26 Aqueous Zinc 6020B 5.9 J ug/L 22
005 MW-27 Aqueous Barium 6020B 56 ug/L 25
005 MW-27 Aqueous Beryllium 6020B 0.44 ug/L 25
005 MW-27 Aqueous Lead 6020B 0.41 J ug/L 25
005 MW-27 Aqueous Zinc 6020B 2.7 J ug/L 25
006 MW-31 Aqueous Barium 6020B 200 ug/L 28
006 MW-31 Aqueous Beryllium 6020B 0.47 ug/L 28
006 MW-31 Aqueous Cadmium 6020B 0.30 J ug/L 28
006 MW-31 Aqueous Copper 6020B 2.4 J ug/L 28
006 MW-31 Aqueous Thallium 6020B 0.15 J ug/L 28
006 MW-31 Aqueous Zinc 6020B 3.7 J ug/L 28
007 US-1 Aqueous Acetone 8260D 5.0 JL ug/L 29
007 US-1 Aqueous Barium 6020B 33 ug/L 32
007 US-1 Aqueous Copper 6020B 1.5 J ug/L 32
008 DS-1 Aqueous Barium 6020B 37 ug/L 36
008 DS-1 Aqueous Lead 6020B 0.44 J ug/L 36
009 Leachate-Unit 2 ph1 Aqueous BOD, 5 day SM 5210B-38 mg/L 37
009 Leachate-Unit 2 ph1 Aqueous COD SM 5220D-590 mg/L 37
009 Leachate-Unit 2 ph1 Aqueous Nitrate - N 353.2 0.22 L mg/L 37
009 Leachate-Unit 2 ph1 Aqueous Sulfate 300.0 4.7 mg/L 37
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 7 of 104
Detection Summary (Continued)
Lot Number: XL31002
Sample Sample ID Matrix Parameter Method Result Q Units Page
009 Leachate-Unit 2 ph1 Aqueous Acetone 8260D 75 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous Benzene 8260D 12 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 2-Butanone (MEK)8260D 140 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous Chlorobenzene 8260D 0.55 J ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 1,4-Dichlorobenzene 8260D 5.9 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 1,1-Dichloroethane 8260D 0.65 J ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 1,2-Dichloroethane 8260D 1.1 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous cis-1,2-Dichloroethene 8260D 1.1 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 1,2-Dichloropropane 8260D 0.49 J ug/L 38
009 Leachate-Unit 2 ph1 Aqueous Ethylbenzene 8260D 23 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 2-Hexanone 8260D 5.3 JL ug/L 38
009 Leachate-Unit 2 ph1 Aqueous 4-Methyl-2-pentanone 8260D 4.7 J ug/L 38
009 Leachate-Unit 2 ph1 Aqueous Styrene 8260D 3.0 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous Toluene 8260D 19 ug/L 38
009 Leachate-Unit 2 ph1 Aqueous Vinyl chloride 8260D 1.3 ug/L 39
009 Leachate-Unit 2 ph1 Aqueous Xylenes (total)8260D 59 ug/L 39
009 Leachate-Unit 2 ph1 Aqueous 1,4-Dioxane 8260D (SIM)35 ug/L 40
009 Leachate-Unit 2 ph1 Aqueous Antimony 6020B 7.3 J ug/L 41
009 Leachate-Unit 2 ph1 Aqueous Arsenic 6020B 28 ug/L 41
009 Leachate-Unit 2 ph1 Aqueous Barium 6020B 1100 ug/L 41
009 Leachate-Unit 2 ph1 Aqueous Chromium 6020B 24 J ug/L 41
009 Leachate-Unit 2 ph1 Aqueous Cobalt 6020B 16 J ug/L 41
009 Leachate-Unit 2 ph1 Aqueous Nickel 6020B 42 ug/L 41
009 Leachate-Unit 2 ph1 Aqueous Vanadium 6020B 34 ug/L 41
010 Leachate-Unit 2 ph2 Aqueous BOD, 5 day SM 5210B-99 mg/L 42
010 Leachate-Unit 2 ph2 Aqueous COD SM 5220D-710 mg/L 42
010 Leachate-Unit 2 ph2 Aqueous Nitrate - N 353.2 0.19 L mg/L 42
010 Leachate-Unit 2 ph2 Aqueous Sulfate 300.0 22 mg/L 42
010 Leachate-Unit 2 ph2 Aqueous Acetone 8260D 350 S ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Benzene 8260D 15 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 2-Butanone (MEK)8260D 720 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Chlorobenzene 8260D 0.91 J ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 1,4-Dichlorobenzene 8260D 10 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 1,1-Dichloroethane 8260D 0.96 J ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 1,2-Dichloroethane 8260D 3.8 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous cis-1,2-Dichloroethene 8260D 10 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous trans-1,2-Dichloroethene 8260D 0.80 J ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 1,2-Dichloropropane 8260D 2.0 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Ethylbenzene 8260D 56 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 2-Hexanone 8260D 9.7 JL ug/L 43
010 Leachate-Unit 2 ph2 Aqueous 4-Methyl-2-pentanone 8260D 140 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Methylene chloride 8260D 2.0 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Styrene 8260D 13 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Toluene 8260D 180 ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Trichloroethene 8260D 0.80 J ug/L 43
010 Leachate-Unit 2 ph2 Aqueous Vinyl chloride 8260D 5.7 ug/L 44
010 Leachate-Unit 2 ph2 Aqueous Xylenes (total)8260D 160 ug/L 44
010 Leachate-Unit 2 ph2 Aqueous 1,4-Dioxane 8260D (SIM)26 ug/L 45
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 8 of 104
Detection Summary (Continued)
Lot Number: XL31002
Sample Sample ID Matrix Parameter Method Result Q Units Page
010 Leachate-Unit 2 ph2 Aqueous Arsenic 6020B 15 ug/L 46
010 Leachate-Unit 2 ph2 Aqueous Barium 6020B 760 ug/L 46
010 Leachate-Unit 2 ph2 Aqueous Chromium 6020B 21 J ug/L 46
010 Leachate-Unit 2 ph2 Aqueous Cobalt 6020B 10 J ug/L 46
010 Leachate-Unit 2 ph2 Aqueous Nickel 6020B 34 ug/L 46
010 Leachate-Unit 2 ph2 Aqueous Vanadium 6020B 21 J ug/L 46
010 Leachate-Unit 2 ph2 Aqueous Zinc 6020B 19 J ug/L 46
011 Equipment Blank Aqueous Methylene chloride 8260D 2.1 ug/L 47
012 MW-12 Aqueous Barium 6020B 70 ug/L 51
013 MW-13 Aqueous Acetone 8260D 5.0 JL ug/L 52
013 MW-13 Aqueous Barium 6020B 64 ug/L 54
013 MW-13 Aqueous Cadmium 6020B 0.19 J ug/L 54
013 MW-13 Aqueous Chromium 6020B 3.9 J ug/L 54
013 MW-13 Aqueous Lead 6020B 3.5 ug/L 54
013 MW-13 Aqueous Selenium 6020B 1.4 J ug/L 54
014 MW-14 Aqueous Barium 6020B 150 ug/L 57
015 FD-1 Aqueous Benzene 8260D 0.53 J ug/L 58
015 FD-1 Aqueous Arsenic 6020B 2.8 ug/L 60
015 FD-1 Aqueous Barium 6020B 200 ug/L 60
015 FD-1 Aqueous Chromium 6020B 1.4 J ug/L 60
015 FD-1 Aqueous Cobalt 6020B 10 ug/L 60
015 FD-1 Aqueous Copper 6020B 3.7 J ug/L 60
015 FD-1 Aqueous Lead 6020B 0.83 J ug/L 60
015 FD-1 Aqueous Nickel 6020B 2.7 J ug/L 60
015 FD-1 Aqueous Zinc 6020B 6.0 J ug/L 60
(116 detections)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 9 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-1
XL31002-001
12/29/2022 1430
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0316 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 10 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-1
XL31002-001
12/29/2022 1430
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0316 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 106 70-130
1,2-Dichloroethane-d4 109 70-130
Toluene-d8 110 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 11 of 104
Volatile Organic Compounds by GC/MS (SIM)
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-1
XL31002-001
12/29/2022 1430
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D (SIM)1 01/05/2023 1251 BLM 64214
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,4-Dioxane 123-91-1 8260D (SIM)ND 1ug/L1.03.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,2-Dichloroethane-d4 92 40-170
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 12 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-1
XL31002-001
12/29/2022 1430
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0131 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 12 1ug/L1.35.0
Beryllium 7440-41-7 6020B ND 1ug/L0.150.40
Cadmium 7440-43-9 6020B ND 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B ND 1ug/L1.35.0
Lead 7439-92-1 6020B ND 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B ND 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 13 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-24
XL31002-002
12/30/2022 1100
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0340 JMM2 64266
2 5030B 8260D 1 01/09/2023 1707 CDA 64454
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D 15 J 2ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D 0.43 J 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 14 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-24
XL31002-002
12/30/2022 1100
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0340 JMM2 64266
2 5030B 8260D 1 01/09/2023 1707 CDA 64454
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceAcceptanceRun 2Run 1
Surrogate Q % Recovery Limits % Recovery LimitsQ
Bromofluorobenzene 108 70-130 112 70-130
1,2-Dichloroethane-d4 110 70-130 104 70-130
Toluene-d8 112 70-130 108 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 15 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-24
XL31002-002
12/30/2022 1100
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0142 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 120 1ug/L1.35.0
Beryllium 7440-41-7 6020B 0.19 J 1ug/L0.150.40
Cadmium 7440-43-9 6020B 0.24 J 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B 49 1ug/L1.35.0
Copper 7440-50-8 6020B 3.1 J 1ug/L1.35.0
Lead 7439-92-1 6020B ND 1ug/L0.251.0
Nickel 7440-02-0 6020B 2.7 J 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B 0.26 J 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B 4.2 J 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 16 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-25
XL31002-003
12/30/2022 1000
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0405 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 17 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-25
XL31002-003
12/30/2022 1000
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0405 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 106 70-130
1,2-Dichloroethane-d4 109 70-130
Toluene-d8 110 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 18 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-25
XL31002-003
12/30/2022 1000
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0255 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 34 1ug/L1.35.0
Beryllium 7440-41-7 6020B 0.27 J 1ug/L0.150.40
Cadmium 7440-43-9 6020B 3.4 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B 1.3 J 1ug/L1.35.0
Lead 7439-92-1 6020B 0.36 J 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B 4.2 J 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 19 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-26
XL31002-004
12/29/2022 1600
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0430 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 20 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-26
XL31002-004
12/29/2022 1600
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0430 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 108 70-130
1,2-Dichloroethane-d4 109 70-130
Toluene-d8 111 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 21 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-26
XL31002-004
12/29/2022 1600
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0305 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 86 1ug/L1.35.0
Beryllium 7440-41-7 6020B 0.24 J 1ug/L0.150.40
Cadmium 7440-43-9 6020B 0.19 J 1ug/L0.130.50
Chromium 7440-47-3 6020B 3.9 J 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B 1.9 J 1ug/L1.35.0
Lead 7439-92-1 6020B 0.32 J 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B 5.9 J 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 22 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-27
XL31002-005
12/29/2022 1530
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0455 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 23 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-27
XL31002-005
12/29/2022 1530
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0455 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 108 70-130
1,2-Dichloroethane-d4 110 70-130
Toluene-d8 111 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 24 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-27
XL31002-005
12/29/2022 1530
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0316 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 56 1ug/L1.35.0
Beryllium 7440-41-7 6020B 0.44 1ug/L0.150.40
Cadmium 7440-43-9 6020B ND 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B ND 1ug/L1.35.0
Lead 7439-92-1 6020B 0.41 J 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B 2.7 J 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 25 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-31
XL31002-006
12/29/2022 1500
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0520 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 26 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-31
XL31002-006
12/29/2022 1500
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0520 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 106 70-130
1,2-Dichloroethane-d4 111 70-130
Toluene-d8 110 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 27 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
MW-31
XL31002-006
12/29/2022 1500
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0326 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 200 1ug/L1.35.0
Beryllium 7440-41-7 6020B 0.47 1ug/L0.150.40
Cadmium 7440-43-9 6020B 0.30 J 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B 2.4 J 1ug/L1.35.0
Lead 7439-92-1 6020B ND 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B 0.15 J 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B 3.7 J 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 28 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
US-1
XL31002-007
12/29/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0544 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D 5.0 JL 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 29 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
US-1
XL31002-007
12/29/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0544 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 104 70-130
1,2-Dichloroethane-d4 108 70-130
Toluene-d8 110 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 30 of 104
Volatile Organic Compounds by GC/MS (SIM)
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
US-1
XL31002-007
12/29/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D (SIM)1 01/05/2023 1315 BLM 64214
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,4-Dioxane 123-91-1 8260D (SIM)ND 1ug/L1.03.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,2-Dichloroethane-d4 92 40-170
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 31 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
US-1
XL31002-007
12/29/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0337 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 33 1ug/L1.35.0
Beryllium 7440-41-7 6020B ND 1ug/L0.150.40
Cadmium 7440-43-9 6020B ND 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B 1.5 J 1ug/L1.35.0
Lead 7439-92-1 6020B ND 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B ND 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 32 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
DS-1
XL31002-008
12/30/2022 1330
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0609 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 33 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
DS-1
XL31002-008
12/30/2022 1330
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0609 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 107 70-130
1,2-Dichloroethane-d4 108 70-130
Toluene-d8 112 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 34 of 104
Volatile Organic Compounds by GC/MS (SIM)
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
DS-1
XL31002-008
12/30/2022 1330
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D (SIM)1 01/05/2023 1340 BLM 64214
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,4-Dioxane 123-91-1 8260D (SIM)ND 1ug/L1.03.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,2-Dichloroethane-d4 93 40-170
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 35 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
DS-1
XL31002-008
12/30/2022 1330
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0347 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B ND 1ug/L1.32.0
Barium 7440-39-3 6020B 37 1ug/L1.35.0
Beryllium 7440-41-7 6020B ND 1ug/L0.150.40
Cadmium 7440-43-9 6020B ND 1ug/L0.130.50
Chromium 7440-47-3 6020B ND 1ug/L1.35.0
Cobalt 7440-48-4 6020B ND 1ug/L1.35.0
Copper 7440-50-8 6020B ND 1ug/L1.35.0
Lead 7439-92-1 6020B 0.44 J 1ug/L0.251.0
Nickel 7440-02-0 6020B ND 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B ND 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 36 of 104
Inorganic non-metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph1
XL31002-009
12/30/2022 1030
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 (BOD, 5 day) SM 5210B-2011 1 01/05/2023 1529 CLL 12/31/2022 1530 63955
1 (COD) SM 5220D-2011 10 01/04/2023 1631 CLL2 64090
1 (Nitrate - N) 353.2 1 12/31/2022 1511 MSG 63954
1 (Orthophospha) 365.1 1 12/31/2022 1432 MSG 63953
1 (Sulfate) 300.0 1 01/04/2023 2158 SJL 64177
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
BOD, 5 day SM 5210B-2011 38 1mg/L0.182.0
COD SM 5220D-2011 590 1mg/L200200
Nitrate - N 353.2 0.22 L 1mg/L0.0100.020
Orthophosphate 365.1 ND 1mg/L0.0500.050
Sulfate 300.0 4.7 1mg/L0.251.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 37 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph1
XL31002-009
12/30/2022 1030
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0747 JMM2 64266
2 5030B 8260D 1 01/09/2023 1730 CDA 64454
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D 75 2ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D 12 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D 140 2ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D 0.55 J 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D 5.9 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D 0.65 J 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D 1.1 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D 1.1 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D 0.49 J 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D 23 1ug/L0.401.0
2-Hexanone 591-78-6 8260D 5.3 JL 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D 4.7 J 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D 3.0 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D 19 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 38 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph1
XL31002-009
12/30/2022 1030
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0747 JMM2 64266
2 5030B 8260D 1 01/09/2023 1730 CDA 64454
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D 1.3 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D 59 1ug/L0.401.0
AcceptanceAcceptanceRun 2Run 1
Surrogate Q % Recovery Limits % Recovery LimitsQ
Bromofluorobenzene 108 70-130 102 70-130
1,2-Dichloroethane-d4 105 70-130 101 70-130
Toluene-d8 113 70-130 107 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 39 of 104
Volatile Organic Compounds by GC/MS (SIM)
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph1
XL31002-009
12/30/2022 1030
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D (SIM)1 01/05/2023 1404 BLM 64214
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,4-Dioxane 123-91-1 8260D (SIM)35 1ug/L1.03.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,2-Dichloroethane-d4 91 40-170
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 40 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph1
XL31002-009
12/30/2022 1030
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 5 01/05/2023 0439 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B 7.3 J 1ug/L2.510
Arsenic 7440-38-2 6020B 28 1ug/L6.310
Barium 7440-39-3 6020B 1100 1ug/L6.325
Beryllium 7440-41-7 6020B ND 1ug/L0.752.0
Cadmium 7440-43-9 6020B ND 1ug/L0.632.5
Chromium 7440-47-3 6020B 24 J 1ug/L6.325
Cobalt 7440-48-4 6020B 16 J 1ug/L6.325
Copper 7440-50-8 6020B ND 1ug/L6.325
Lead 7439-92-1 6020B ND 1ug/L1.35.0
Nickel 7440-02-0 6020B 42 1ug/L6.325
Selenium 7782-49-2 6020B ND 1ug/L6.325
Silver 7440-22-4 6020B ND 1ug/L1.35.0
Thallium 7440-28-0 6020B ND 1ug/L0.752.5
Vanadium 7440-62-2 6020B 34 1ug/L1325
Zinc 7440-66-6 6020B ND 1ug/L1350
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 41 of 104
Inorganic non-metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph2
XL31002-010
12/30/2022 1115
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 (BOD, 5 day) SM 5210B-2011 1 01/05/2023 1532 CLL 12/31/2022 1533 63955
1 (COD) SM 5220D-2011 10 01/04/2023 1631 CLL2 64090
1 (Nitrate - N) 353.2 1 12/31/2022 1516 MSG 63954
1 (Orthophospha) 365.1 1 12/31/2022 1432 MSG 63953
1 (Sulfate) 300.0 1 01/04/2023 2217 SJL 64177
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
BOD, 5 day SM 5210B-2011 99 1mg/L0.182.0
COD SM 5220D-2011 710 1mg/L200200
Nitrate - N 353.2 0.19 L 1mg/L0.0100.020
Orthophosphate 365.1 ND S 1mg/L0.0500.050
Sulfate 300.0 22 1mg/L0.251.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 42 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph2
XL31002-010
12/30/2022 1115
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0812 JMM2 64266
2 5030B 8260D 10 01/09/2023 1839 CDA 64454
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D 350 S 2ug/L50200
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D 15 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D 720 2ug/L20100
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D 0.91 J 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D 10 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D 0.96 J 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D 3.8 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D 10 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D 0.80 J 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D 2.0 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D 56 1ug/L0.401.0
2-Hexanone 591-78-6 8260D 9.7 JL 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D 140 1ug/L2.010
Methylene chloride 75-09-2 8260D 2.0 1ug/L0.401.0
Styrene 100-42-5 8260D 13 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D 180 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D 0.80 J 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 43 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph2
XL31002-010
12/30/2022 1115
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0812 JMM2 64266
2 5030B 8260D 10 01/09/2023 1839 CDA 64454
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D 5.7 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D 160 1ug/L0.401.0
AcceptanceAcceptanceRun 2Run 1
Surrogate Q % Recovery Limits % Recovery LimitsQ
Bromofluorobenzene 107 70-130 107 70-130
1,2-Dichloroethane-d4 105 70-130 101 70-130
Toluene-d8 110 70-130 111 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 44 of 104
Volatile Organic Compounds by GC/MS (SIM)
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph2
XL31002-010
12/30/2022 1115
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D (SIM)1 01/05/2023 1428 BLM 64214
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,4-Dioxane 123-91-1 8260D (SIM)26 1ug/L1.03.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
1,2-Dichloroethane-d4 93 40-170
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 45 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Leachate-Unit 2 ph2
XL31002-010
12/30/2022 1115
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 5 01/05/2023 0450 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L2.510
Arsenic 7440-38-2 6020B 15 1ug/L6.310
Barium 7440-39-3 6020B 760 1ug/L6.325
Beryllium 7440-41-7 6020B ND 1ug/L0.752.0
Cadmium 7440-43-9 6020B ND 1ug/L0.632.5
Chromium 7440-47-3 6020B 21 J 1ug/L6.325
Cobalt 7440-48-4 6020B 10 J 1ug/L6.325
Copper 7440-50-8 6020B ND 1ug/L6.325
Lead 7439-92-1 6020B ND 1ug/L1.35.0
Nickel 7440-02-0 6020B 34 1ug/L6.325
Selenium 7782-49-2 6020B ND 1ug/L6.325
Silver 7440-22-4 6020B ND 1ug/L1.35.0
Thallium 7440-28-0 6020B ND 1ug/L0.752.5
Vanadium 7440-62-2 6020B 21 J 1ug/L1325
Zinc 7440-66-6 6020B 19 J 1ug/L1350
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 46 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Equipment Blank
XL31002-011
12/30/2022 1535
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0136 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND L 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D ND 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND L 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND L 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND L 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D 2.1 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
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Page 47 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
Equipment Blank
XL31002-011
12/30/2022 1535
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0136 JMM2 64266
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 109 70-130
1,2-Dichloroethane-d4 109 70-130
Toluene-d8 113 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
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Page 48 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
FD-1
XL31002-015
12/30/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0919 JMM2 64265
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Acetone 67-64-1 8260D ND 1ug/L5.020
Acrylonitrile 107-13-1 8260D ND 1ug/L0.8020
Benzene 71-43-2 8260D 0.53 J 1ug/L0.401.0
Bromochloromethane 74-97-5 8260D ND 1ug/L0.401.0
Bromodichloromethane 75-27-4 8260D ND 1ug/L0.401.0
Bromoform 75-25-2 8260D ND 1ug/L0.401.0
Bromomethane (Methyl bromide)74-83-9 8260D ND 1ug/L0.402.0
2-Butanone (MEK)78-93-3 8260D ND 1ug/L2.010
Carbon disulfide 75-15-0 8260D ND 1ug/L0.401.0
Carbon tetrachloride 56-23-5 8260D ND 1ug/L0.401.0
Chlorobenzene 108-90-7 8260D ND 1ug/L0.401.0
Chloroethane 75-00-3 8260D ND 1ug/L0.402.0
Chloroform 67-66-3 8260D ND 1ug/L0.401.0
Chloromethane (Methyl chloride)74-87-3 8260D ND 1ug/L0.501.0
1,2-Dibromo-3-chloropropane (DBCP)96-12-8 8260D ND 1ug/L0.401.0
Dibromochloromethane 124-48-1 8260D ND 1ug/L0.401.0
1,2-Dibromoethane (EDB)106-93-4 8260D ND 1ug/L0.401.0
Dibromomethane (Methylene bromide)74-95-3 8260D ND 1ug/L0.401.0
trans-1,4-Dichloro-2-butene 110-57-6 8260D ND 1ug/L0.502.0
1,2-Dichlorobenzene 95-50-1 8260D ND 1ug/L0.401.0
1,4-Dichlorobenzene 106-46-7 8260D ND 1ug/L0.401.0
1,1-Dichloroethane 75-34-3 8260D ND 1ug/L0.401.0
1,2-Dichloroethane 107-06-2 8260D ND 1ug/L0.401.0
1,1-Dichloroethene 75-35-4 8260D ND 1ug/L0.401.0
cis-1,2-Dichloroethene 156-59-2 8260D ND 1ug/L0.401.0
trans-1,2-Dichloroethene 156-60-5 8260D ND 1ug/L0.401.0
1,2-Dichloropropane 78-87-5 8260D ND 1ug/L0.401.0
cis-1,3-Dichloropropene 10061-01-5 8260D ND 1ug/L0.401.0
trans-1,3-Dichloropropene 10061-02-6 8260D ND 1ug/L0.401.0
1,4-Dioxane 123-91-1 8260D ND 1ug/L1350
Ethylbenzene 100-41-4 8260D ND 1ug/L0.401.0
2-Hexanone 591-78-6 8260D ND 1ug/L2.010
Methyl iodide (Iodomethane)74-88-4 8260D ND 1ug/L0.405.0
4-Methyl-2-pentanone 108-10-1 8260D ND 1ug/L2.010
Methylene chloride 75-09-2 8260D ND 1ug/L0.401.0
Styrene 100-42-5 8260D ND 1ug/L0.411.0
1,1,1,2-Tetrachloroethane 630-20-6 8260D ND 1ug/L0.401.0
1,1,2,2-Tetrachloroethane 79-34-5 8260D ND 1ug/L0.401.0
Tetrachloroethene 127-18-4 8260D ND 1ug/L0.401.0
Toluene 108-88-3 8260D ND 1ug/L0.401.0
1,1,1-Trichloroethane 71-55-6 8260D ND 1ug/L0.401.0
1,1,2-Trichloroethane 79-00-5 8260D ND 1ug/L0.401.0
Trichloroethene 79-01-6 8260D ND 1ug/L0.401.0
Trichlorofluoromethane 75-69-4 8260D ND 1ug/L0.401.0
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
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Page 58 of 104
Volatile Organic Compounds by GC/MS
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
FD-1
XL31002-015
12/30/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 5030B 8260D 1 01/06/2023 0919 JMM2 64265
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
1,2,3-Trichloropropane 96-18-4 8260D ND 1ug/L0.401.0
Vinyl acetate 108-05-4 8260D ND 1ug/L1.25.0
Vinyl chloride 75-01-4 8260D ND 1ug/L0.401.0
Xylenes (total)1330-20-7 8260D ND 1ug/L0.401.0
AcceptanceRun 1
Surrogate Q % Recovery Limits
Bromofluorobenzene 89 70-130
1,2-Dichloroethane-d4 89 70-130
Toluene-d8 94 70-130
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
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Page 59 of 104
ICP-MS Metals
Description:Matrix:
Date Received:
Client:Laboratory ID:
Date Sampled:
Buxton Environmental
FD-1
XL31002-015
12/30/2022 1145
12/31/2022
Aqueous
Project Name: Gaston Co Unit II MSW
Project Number: 3606
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 3005A 6020B 1 01/05/2023 0532 BNW 01/03/2023 1530 63980
AnalyticalCAS
Parameter Number Method Result Q LOQ Units Run DL
Antimony 7440-36-0 6020B ND 1ug/L0.502.0
Arsenic 7440-38-2 6020B 2.8 1ug/L1.32.0
Barium 7440-39-3 6020B 200 1ug/L1.35.0
Beryllium 7440-41-7 6020B ND 1ug/L0.150.40
Cadmium 7440-43-9 6020B ND 1ug/L0.130.50
Chromium 7440-47-3 6020B 1.4 J 1ug/L1.35.0
Cobalt 7440-48-4 6020B 10 1ug/L1.35.0
Copper 7440-50-8 6020B 3.7 J 1ug/L1.35.0
Lead 7439-92-1 6020B 0.83 J 1ug/L0.251.0
Nickel 7440-02-0 6020B 2.7 J 1ug/L1.35.0
Selenium 7782-49-2 6020B ND 1ug/L1.35.0
Silver 7440-22-4 6020B ND 1ug/L0.251.0
Thallium 7440-28-0 6020B ND 1ug/L0.150.50
Vanadium 7440-62-2 6020B ND 1ug/L2.55.0
Zinc 7440-66-6 6020B 6.0 J 1ug/L2.510
J = Estimated result < LOQ and > DL_
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range
P = The RPD between two GC columns exceeds 40%ND = Not detected at or above the DL N = Recovery is out of criteria
H = Out of holding time
Q = Surrogate failure
L = LCS/LCSD failure
S = MS/MSD failure
DL = Detection Limit
W = Reported on wet weight basis
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Page 60 of 104
QC Summary
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Page 61 of 104
Inorganic non-metals - MB
Batch:
Sample ID:XQ63953-001
63953
Analytical Method:365.1
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Orthophosphate ND 12/31/2022 14320.050 0.050 mg/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 62 of 104
Inorganic non-metals - LCS
Batch:
Sample ID:XQ63953-002
63953
Analytical Method:365.1
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(mg/L)(mg/L)
Orthophosphate 0.24 12/31/2022 1432940.25 90-1101
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 63 of 104
Inorganic non-metals - MS
Batch:
Sample ID:XL31002-010MS
63953
Analytical Method:365.1
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
Limit
Sample
Amount
Dil(mg/L)(mg/L)(mg/L)
Orthophosphate 0.010 12/31/2022 1432N4.10.25 90-110ND1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 64 of 104
Inorganic non-metals - MSD
Batch:
Sample ID:XL31002-010MD
63953
Analytical Method:365.1
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
Limit
Sample
Amount
Dil(mg/L)(mg/L)(mg/L)
Orthophosphate 0.014 12/31/2022 1432N,+5.40.25 90-11029 20ND1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 65 of 104
Inorganic non-metals - MB
Batch:
Sample ID:XQ63954-001
63954
Analytical Method:353.2
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Nitrate - N ND 12/31/2022 15070.020 0.010 mg/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 66 of 104
Inorganic non-metals - LCS
Batch:
Sample ID:XQ63954-002
63954
Analytical Method:353.2
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(mg/L)(mg/L)
Nitrate - N 0.46 12/31/2022 1509N1160.40 90-1101
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 67 of 104
Inorganic non-metals - MS
Batch:
Sample ID:XL31002-009MS
63954
Analytical Method:353.2
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
Limit
Sample
Amount
Dil(mg/L)(mg/L)(mg/L)
Nitrate - N 0.64 12/31/2022 15121060.40 90-1100.22 1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 68 of 104
Inorganic non-metals - MSD
Batch:
Sample ID:XL31002-009MD
63954
Analytical Method:353.2
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
Limit
Sample
Amount
Dil(mg/L)(mg/L)(mg/L)
Nitrate - N 0.62 12/31/2022 1514980.40 90-1104.6 200.22 1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 69 of 104
Inorganic non-metals - BOD Blank and GGA
Batch:SCF:
SCF Range:
63955
0.6 - 1.0Analytical Method:SM 5210B-2011
Matrix:Aqueous
0.5
Sample ID
Result
Q Limit Analysis DateDeplAvg. Depl (mg/L)
Avg. Result
(mg/L)Prep Date
XQ63955-041 (Blank)01/05/2023 15170.2 12/31/2022 1511-0.01
XQ63955-141 (Blank)01/05/2023 15170.2 12/31/2022 15110.07
XQ63955-241 (Blank)01/05/2023 15170.20.03 12/31/2022 15110.02
XQ63955-035 (GGA)174 01/05/2023 1520167.5-228.5 12/31/2022 1518
XQ63955-135 (GGA)190.5 01/05/2023 1521167.5-228.5 12/31/2022 1518
XQ63955-235 (GGA)149.5 01/05/2023 15211167.5-228.5 12/31/2022 1518171.3
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 70 of 104
Inorganic non-metals - Duplicate
Batch:
Sample ID:XL31002-009DU
63955
Analytical Method:SM 5210B-2011
Matrix:Aqueous
Parameter
Result
Q Analysis Date% RPD
%RPD
Limit
Sample
Amount
Dil(mg/L)(mg/L)
BOD, 5 day 46 01/05/2023 15270.00 203846.18
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 71 of 104
Inorganic non-metals - MB
Batch:
Sample ID:YQ64090-001
64090
Analytical Method:SM 5220D-2011
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
COD ND 01/04/2023 16262020mg/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 72 of 104
Inorganic non-metals - LCS
Batch:
Sample ID:YQ64090-002
64090
Analytical Method:SM 5220D-2011
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(mg/L)(mg/L)
COD 410 01/04/2023 162610240095-1051
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
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Page 73 of 104
Inorganic non-metals - MB
Batch:
Sample ID:YQ64177-001
64177
Analytical Method:300.0
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Sulfate ND 01/04/2023 12111.0 0.25 mg/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
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Page 74 of 104
Inorganic non-metals - LCS
Batch:
Sample ID:YQ64177-002
64177
Analytical Method:300.0
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(mg/L)(mg/L)
Sulfate 20 01/04/2023 1249992090-1101
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 75 of 104
Volatile Organic Compounds by GC/MS (SIM) - MB
Batch:Prep Method:
Sample ID:YQ64214-001
64214 5030B
Analytical Method:8260D (SIM)
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
1,4-Dioxane ND 01/05/2023 11133.0 1.0 ug/L1
Surrogate Q % Rec
Acceptance
Limit
1,2-Dichloroethane-d4 93 40-170
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 76 of 104
Volatile Organic Compounds by GC/MS (SIM) - LCS
Batch:Prep Method:
Sample ID:YQ64214-002
64214 5030B
Analytical Method:8260D (SIM)
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
1,4-Dioxane 52 01/05/2023 10001045070-1301
Surrogate Q % Rec
Acceptance
Limit
1,2-Dichloroethane-d4 118 40-170
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 77 of 104
Volatile Organic Compounds by GC/MS (SIM) - MS
Batch:Prep Method:
Sample ID:XL31002-001MS
64214 5030B
Analytical Method:8260D (SIM)
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
Limit
Sample
Amount
Dil(ug/L)(ug/L)(ug/L)
1,4-Dioxane 44 01/05/2023 1958895070-130ND1
Surrogate Q % Rec
Acceptance
Limit
1,2-Dichloroethane-d4 98 40-170
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 78 of 104
Volatile Organic Compounds by GC/MS - MB
Batch:Prep Method:
Sample ID:YQ64265-001
64265 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Acetone ND 01/05/2023 2305205.0 ug/L1
Acrylonitrile ND 01/05/2023 2305200.80 ug/L1
Benzene ND 01/05/2023 23051.0 0.40 ug/L1
Bromochloromethane ND 01/05/2023 23051.0 0.40 ug/L1
Bromodichloromethane ND 01/05/2023 23051.0 0.40 ug/L1
Bromoform ND 01/05/2023 23051.0 0.40 ug/L1
Bromomethane (Methyl bromide)ND 01/05/2023 23052.0 0.40 ug/L1
2-Butanone (MEK)ND 01/05/2023 2305102.0 ug/L1
Carbon disulfide ND 01/05/2023 23051.0 0.40 ug/L1
Carbon tetrachloride ND 01/05/2023 23051.0 0.40 ug/L1
Chlorobenzene ND 01/05/2023 23051.0 0.40 ug/L1
Chloroethane ND 01/05/2023 23052.0 0.40 ug/L1
Chloroform ND 01/05/2023 23051.0 0.40 ug/L1
Chloromethane (Methyl chloride)ND 01/05/2023 23051.0 0.50 ug/L1
1,2-Dibromo-3-chloropropane (DBCP)ND 01/05/2023 23051.0 0.40 ug/L1
Dibromochloromethane ND 01/05/2023 23051.0 0.40 ug/L1
1,2-Dibromoethane (EDB)ND 01/05/2023 23051.0 0.40 ug/L1
Dibromomethane (Methylene bromide)ND 01/05/2023 23051.0 0.40 ug/L1
trans-1,4-Dichloro-2-butene ND 01/05/2023 23052.0 0.50 ug/L1
1,2-Dichlorobenzene ND 01/05/2023 23051.0 0.40 ug/L1
1,4-Dichlorobenzene ND 01/05/2023 23051.0 0.40 ug/L1
1,1-Dichloroethane ND 01/05/2023 23051.0 0.40 ug/L1
1,2-Dichloroethane ND 01/05/2023 23051.0 0.40 ug/L1
1,1-Dichloroethene ND 01/05/2023 23051.0 0.40 ug/L1
cis-1,2-Dichloroethene ND 01/05/2023 23051.0 0.40 ug/L1
trans-1,2-Dichloroethene ND 01/05/2023 23051.0 0.40 ug/L1
1,2-Dichloropropane ND 01/05/2023 23051.0 0.40 ug/L1
cis-1,3-Dichloropropene ND 01/05/2023 23051.0 0.40 ug/L1
trans-1,3-Dichloropropene ND 01/05/2023 23051.0 0.40 ug/L1
1,4-Dioxane ND 01/05/2023 23055013ug/L1
Ethylbenzene ND 01/05/2023 23051.0 0.40 ug/L1
2-Hexanone ND 01/05/2023 2305102.0 ug/L1
Methyl iodide (Iodomethane)ND 01/05/2023 23055.0 0.40 ug/L1
4-Methyl-2-pentanone ND 01/05/2023 2305102.0 ug/L1
Methylene chloride ND 01/05/2023 23051.0 0.40 ug/L1
Styrene ND 01/05/2023 23051.0 0.41 ug/L1
1,1,1,2-Tetrachloroethane ND 01/05/2023 23051.0 0.40 ug/L1
1,1,2,2-Tetrachloroethane ND 01/05/2023 23051.0 0.40 ug/L1
Tetrachloroethene ND 01/05/2023 23051.0 0.40 ug/L1
Toluene ND 01/05/2023 23051.0 0.40 ug/L1
1,1,1-Trichloroethane ND 01/05/2023 23051.0 0.40 ug/L1
1,1,2-Trichloroethane ND 01/05/2023 23051.0 0.40 ug/L1
Trichloroethene ND 01/05/2023 23051.0 0.40 ug/L1
Trichlorofluoromethane ND 01/05/2023 23051.0 0.40 ug/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 79 of 104
Volatile Organic Compounds by GC/MS - MB
Batch:Prep Method:
Sample ID:YQ64265-001
64265 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
1,2,3-Trichloropropane ND 01/05/2023 23051.0 0.40 ug/L1
Vinyl acetate ND 01/05/2023 23055.0 1.2 ug/L1
Vinyl chloride ND 01/05/2023 23051.0 0.40 ug/L1
Xylenes (total)ND 01/05/2023 23051.0 0.40 ug/L1
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 94 70-130
1,2-Dichloroethane-d4 95 70-130
Toluene-d8 96 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 80 of 104
Volatile Organic Compounds by GC/MS - LCS
Batch:Prep Method:
Sample ID:YQ64265-002
64265 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
Acetone 130 01/05/2023 215513010060-1401
Acrylonitrile 90 01/05/2023 21559010070-1301
Benzene 49 01/05/2023 2155995070-1301
Bromochloromethane 48 01/05/2023 2155965070-1301
Bromodichloromethane 49 01/05/2023 2155995070-1301
Bromoform 42 01/05/2023 2155845070-1301
Bromomethane (Methyl bromide)55 01/05/2023 21551105070-1301
2-Butanone (MEK)99 01/05/2023 21559910070-1301
Carbon disulfide 49 01/05/2023 2155995070-1301
Carbon tetrachloride 47 01/05/2023 2155935070-1301
Chlorobenzene 50 01/05/2023 21551005070-1301
Chloroethane 52 01/05/2023 21551055070-1301
Chloroform 44 01/05/2023 2155885070-1301
Chloromethane (Methyl chloride)56 01/05/2023 21551115060-1401
1,2-Dibromo-3-chloropropane (DBCP)48 01/05/2023 2155955070-1301
Dibromochloromethane 51 01/05/2023 21551015070-1301
1,2-Dibromoethane (EDB)51 01/05/2023 21551025070-1301
Dibromomethane (Methylene bromide)50 01/05/2023 21551005070-1301
trans-1,4-Dichloro-2-butene 41 01/05/2023 2155825070-1301
1,2-Dichlorobenzene 52 01/05/2023 21551045070-1301
1,4-Dichlorobenzene 50 01/05/2023 2155995070-1301
1,1-Dichloroethane 45 01/05/2023 2155905070-1301
1,2-Dichloroethane 50 01/05/2023 21551005070-1301
1,1-Dichloroethene 49 01/05/2023 2155985070-1301
cis-1,2-Dichloroethene 45 01/05/2023 2155905070-1301
trans-1,2-Dichloroethene 46 01/05/2023 2155925070-1301
1,2-Dichloropropane 48 01/05/2023 2155975070-1301
cis-1,3-Dichloropropene 51 01/05/2023 21551015070-1301
trans-1,3-Dichloropropene 51 01/05/2023 21551035070-1301
1,4-Dioxane 440 01/05/2023 21558750060-1401
Ethylbenzene 53 01/05/2023 21551065070-1301
2-Hexanone 100 01/05/2023 215510410070-1301
Methyl iodide (Iodomethane)52 01/05/2023 21551055070-1301
4-Methyl-2-pentanone 99 01/05/2023 21559910070-1301
Methylene chloride 47 01/05/2023 2155955070-1301
Styrene 50 01/05/2023 21551005070-1301
1,1,1,2-Tetrachloroethane 52 01/05/2023 21551045070-1301
1,1,2,2-Tetrachloroethane 49 01/05/2023 2155985070-1301
Tetrachloroethene 50 01/05/2023 21551015070-1301
Toluene 51 01/05/2023 21551025070-1301
1,1,1-Trichloroethane 48 01/05/2023 2155965070-1301
1,1,2-Trichloroethane 52 01/05/2023 21551045070-1301
Trichloroethene 52 01/05/2023 21551055070-1301
Trichlorofluoromethane 54 01/05/2023 21551095070-1301
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 81 of 104
Volatile Organic Compounds by GC/MS - LCS
Batch:Prep Method:
Sample ID:YQ64265-002
64265 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
1,2,3-Trichloropropane 48 01/05/2023 2155965070-1301
Vinyl acetate 38 01/05/2023 2155755060-1401
Vinyl chloride 52 01/05/2023 21551055070-1301
Xylenes (total)100 01/05/2023 215510110070-1301
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 94 70-130
1,2-Dichloroethane-d4 90 70-130
Toluene-d8 92 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 82 of 104
Volatile Organic Compounds by GC/MS - LCSD
Batch:Prep Method:
Sample ID:YQ64265-003
64265 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
LimitDil(ug/L)(ug/L)
Acetone 110 01/06/2023 013111310060-14014 201
Acrylonitrile 79 01/06/2023 01317910070-13013 201
Benzene 48 01/06/2023 0131975070-1301.9 201
Bromochloromethane 45 01/06/2023 0131895070-1307.3 201
Bromodichloromethane 48 01/06/2023 0131965070-1303.4 201
Bromoform 43 01/06/2023 0131855070-1301.9 201
Bromomethane (Methyl bromide)57 01/06/2023 01311145070-1303.8 201
2-Butanone (MEK)92 01/06/2023 01319210070-1307.6 201
Carbon disulfide 44 01/06/2023 0131895070-13011 201
Carbon tetrachloride 43 01/06/2023 0131875070-1307.4 201
Chlorobenzene 50 01/06/2023 0131995070-1300.69 201
Chloroethane 53 01/06/2023 01311055070-1300.26 201
Chloroform 42 01/06/2023 0131845070-1303.7 201
Chloromethane (Methyl chloride)58 01/06/2023 01311175060-1404.4 201
1,2-Dibromo-3-chloropropane (DBCP)47 01/06/2023 0131945070-1301.6 201
Dibromochloromethane 51 01/06/2023 01311015070-1300.16 201
1,2-Dibromoethane (EDB)51 01/06/2023 01311025070-1300.28 201
Dibromomethane (Methylene bromide)49 01/06/2023 0131975070-1303.4 201
trans-1,4-Dichloro-2-butene 41 01/06/2023 0131835070-1300.82 201
1,2-Dichlorobenzene 52 01/06/2023 01311045070-1300.062 201
1,4-Dichlorobenzene 49 01/06/2023 0131995070-1300.82 201
1,1-Dichloroethane 43 01/06/2023 0131865070-1304.5 201
1,2-Dichloroethane 48 01/06/2023 0131975070-1303.1 201
1,1-Dichloroethene 43 01/06/2023 0131865070-13014 201
cis-1,2-Dichloroethene 43 01/06/2023 0131875070-1304.1 201
trans-1,2-Dichloroethene 43 01/06/2023 0131865070-1306.8 201
1,2-Dichloropropane 47 01/06/2023 0131935070-1303.8 201
cis-1,3-Dichloropropene 49 01/06/2023 0131985070-1303.6 201
trans-1,3-Dichloropropene 51 01/06/2023 01311015070-1301.6 201
1,4-Dioxane 350 01/06/2023 0131+70500 60-14021 201
Ethylbenzene 52 01/06/2023 01311035070-1302.7 201
2-Hexanone 100 01/06/2023 013110310070-1300.53 201
Methyl iodide (Iodomethane)47 01/06/2023 0131955070-13010 201
4-Methyl-2-pentanone 93 01/06/2023 01319310070-1305.8 201
Methylene chloride 43 01/06/2023 0131855070-13010 201
Styrene 50 01/06/2023 01311005070-1300.15 201
1,1,1,2-Tetrachloroethane 51 01/06/2023 01311025070-1301.4 201
1,1,2,2-Tetrachloroethane 49 01/06/2023 0131975070-1300.48 201
Tetrachloroethene 49 01/06/2023 0131985070-1303.3 201
Toluene 50 01/06/2023 01311005070-1301.5 201
1,1,1-Trichloroethane 43 01/06/2023 0131855070-13012 201
1,1,2-Trichloroethane 52 01/06/2023 01311055070-1300.13 201
Trichloroethene 50 01/06/2023 01311005070-1304.4 201
Trichlorofluoromethane 51 01/06/2023 01311015070-1306.9 201
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 83 of 104
Volatile Organic Compounds by GC/MS - LCSD
Batch:Prep Method:
Sample ID:YQ64265-003
64265 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
LimitDil(ug/L)(ug/L)
1,2,3-Trichloropropane 49 01/06/2023 0131985070-1302.1 201
Vinyl acetate 37 01/06/2023 0131745060-1401.0 201
Vinyl chloride 53 01/06/2023 01311075070-1301.6 201
Xylenes (total)100 01/06/2023 013110110070-1300.29 201
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 93 70-130
1,2-Dichloroethane-d4 93 70-130
Toluene-d8 93 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 84 of 104
Volatile Organic Compounds by GC/MS - MB
Batch:Prep Method:
Sample ID:YQ64266-001
64266 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Acetone ND 01/06/2023 0022205.0 ug/L1
Acrylonitrile ND 01/06/2023 0022200.80 ug/L1
Benzene ND 01/06/2023 00221.0 0.40 ug/L1
Bromochloromethane ND 01/06/2023 00221.0 0.40 ug/L1
Bromodichloromethane ND 01/06/2023 00221.0 0.40 ug/L1
Bromoform ND 01/06/2023 00221.0 0.40 ug/L1
Bromomethane (Methyl bromide)ND 01/06/2023 00222.0 0.40 ug/L1
2-Butanone (MEK)ND 01/06/2023 0022102.0 ug/L1
Carbon disulfide ND 01/06/2023 00221.0 0.40 ug/L1
Carbon tetrachloride ND 01/06/2023 00221.0 0.40 ug/L1
Chlorobenzene ND 01/06/2023 00221.0 0.40 ug/L1
Chloroethane ND 01/06/2023 00222.0 0.40 ug/L1
Chloroform ND 01/06/2023 00221.0 0.40 ug/L1
Chloromethane (Methyl chloride)ND 01/06/2023 00221.0 0.50 ug/L1
1,2-Dibromo-3-chloropropane (DBCP)ND 01/06/2023 00221.0 0.40 ug/L1
Dibromochloromethane ND 01/06/2023 00221.0 0.40 ug/L1
1,2-Dibromoethane (EDB)ND 01/06/2023 00221.0 0.40 ug/L1
Dibromomethane (Methylene bromide)ND 01/06/2023 00221.0 0.40 ug/L1
trans-1,4-Dichloro-2-butene ND 01/06/2023 00222.0 0.50 ug/L1
1,2-Dichlorobenzene ND 01/06/2023 00221.0 0.40 ug/L1
1,4-Dichlorobenzene ND 01/06/2023 00221.0 0.40 ug/L1
1,1-Dichloroethane ND 01/06/2023 00221.0 0.40 ug/L1
1,2-Dichloroethane ND 01/06/2023 00221.0 0.40 ug/L1
1,1-Dichloroethene ND 01/06/2023 00221.0 0.40 ug/L1
cis-1,2-Dichloroethene ND 01/06/2023 00221.0 0.40 ug/L1
trans-1,2-Dichloroethene ND 01/06/2023 00221.0 0.40 ug/L1
1,2-Dichloropropane ND 01/06/2023 00221.0 0.40 ug/L1
cis-1,3-Dichloropropene ND 01/06/2023 00221.0 0.40 ug/L1
trans-1,3-Dichloropropene ND 01/06/2023 00221.0 0.40 ug/L1
1,4-Dioxane ND 01/06/2023 00225013ug/L1
Ethylbenzene ND 01/06/2023 00221.0 0.40 ug/L1
2-Hexanone ND 01/06/2023 0022102.0 ug/L1
Methyl iodide (Iodomethane)ND 01/06/2023 00225.0 0.40 ug/L1
4-Methyl-2-pentanone ND 01/06/2023 0022102.0 ug/L1
Methylene chloride ND 01/06/2023 00221.0 0.40 ug/L1
Styrene ND 01/06/2023 00221.0 0.41 ug/L1
1,1,1,2-Tetrachloroethane ND 01/06/2023 00221.0 0.40 ug/L1
1,1,2,2-Tetrachloroethane ND 01/06/2023 00221.0 0.40 ug/L1
Tetrachloroethene ND 01/06/2023 00221.0 0.40 ug/L1
Tetrahydrofuran ND 01/06/2023 00225.0 1.0 ug/L1
Toluene ND 01/06/2023 00221.0 0.40 ug/L1
1,1,1-Trichloroethane ND 01/06/2023 00221.0 0.40 ug/L1
1,1,2-Trichloroethane ND 01/06/2023 00221.0 0.40 ug/L1
Trichloroethene ND 01/06/2023 00221.0 0.40 ug/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 85 of 104
Volatile Organic Compounds by GC/MS - MB
Batch:Prep Method:
Sample ID:YQ64266-001
64266 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Trichlorofluoromethane ND 01/06/2023 00221.0 0.40 ug/L1
1,2,3-Trichloropropane ND 01/06/2023 00221.0 0.40 ug/L1
Vinyl acetate ND 01/06/2023 00225.0 1.2 ug/L1
Vinyl chloride ND 01/06/2023 00221.0 0.40 ug/L1
Xylenes (total)ND 01/06/2023 00221.0 0.40 ug/L1
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 105 70-130
1,2-Dichloroethane-d4 111 70-130
Toluene-d8 111 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 86 of 104
Volatile Organic Compounds by GC/MS - LCS
Batch:Prep Method:
Sample ID:YQ64266-002
64266 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
Acetone 190 01/05/2023 2141N18610060-1401
Acrylonitrile 99 01/05/2023 21419910070-1301
Benzene 46 01/05/2023 2141935070-1301
Bromochloromethane 46 01/05/2023 2141925070-1301
Bromodichloromethane 46 01/05/2023 2141915070-1301
Bromoform 44 01/05/2023 2141895070-1301
Bromomethane (Methyl bromide)53 01/05/2023 21411075070-1301
2-Butanone (MEK)140 01/05/2023 2141N13810070-1301
Carbon disulfide 49 01/05/2023 2141995070-1301
Carbon tetrachloride 46 01/05/2023 2141935070-1301
Chlorobenzene 48 01/05/2023 2141955070-1301
Chloroethane 48 01/05/2023 2141965070-1301
Chloroform 45 01/05/2023 2141915070-1301
Chloromethane (Methyl chloride)49 01/05/2023 2141985060-1401
1,2-Dibromo-3-chloropropane (DBCP)46 01/05/2023 2141935070-1301
Dibromochloromethane 45 01/05/2023 2141915070-1301
1,2-Dibromoethane (EDB)47 01/05/2023 2141955070-1301
Dibromomethane (Methylene bromide)49 01/05/2023 2141985070-1301
trans-1,4-Dichloro-2-butene 51 01/05/2023 21411015070-1301
1,2-Dichlorobenzene 50 01/05/2023 21411005070-1301
1,4-Dichlorobenzene 49 01/05/2023 2141995070-1301
1,1-Dichloroethane 49 01/05/2023 2141975070-1301
1,2-Dichloroethane 50 01/05/2023 21411005070-1301
1,1-Dichloroethene 45 01/05/2023 2141905070-1301
cis-1,2-Dichloroethene 48 01/05/2023 2141965070-1301
trans-1,2-Dichloroethene 48 01/05/2023 2141965070-1301
1,2-Dichloropropane 49 01/05/2023 2141985070-1301
cis-1,3-Dichloropropene 48 01/05/2023 2141965070-1301
trans-1,3-Dichloropropene 49 01/05/2023 2141975070-1301
1,4-Dioxane 870 01/05/2023 2141N17550060-1401
Ethylbenzene 49 01/05/2023 2141975070-1301
2-Hexanone 130 01/05/2023 2141N13410070-1301
Methyl iodide (Iodomethane)48 01/05/2023 2141975070-1301
4-Methyl-2-pentanone 100 01/05/2023 214110010070-1301
Methylene chloride 49 01/05/2023 2141985070-1301
Styrene 48 01/05/2023 2141965070-1301
1,1,1,2-Tetrachloroethane 47 01/05/2023 2141945070-1301
1,1,2,2-Tetrachloroethane 49 01/05/2023 2141985070-1301
Tetrachloroethene 46 01/05/2023 2141925070-1301
Tetrahydrofuran 55 01/05/2023 21411105070-1301
Toluene 48 01/05/2023 2141965070-1301
1,1,1-Trichloroethane 46 01/05/2023 2141915070-1301
1,1,2-Trichloroethane 48 01/05/2023 2141965070-1301
Trichloroethene 46 01/05/2023 2141915070-1301
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 87 of 104
Volatile Organic Compounds by GC/MS - LCS
Batch:Prep Method:
Sample ID:YQ64266-002
64266 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
Trichlorofluoromethane 52 01/05/2023 21411045070-1301
1,2,3-Trichloropropane 49 01/05/2023 2141995070-1301
Vinyl acetate 46 01/05/2023 2141915060-1401
Vinyl chloride 53 01/05/2023 21411065070-1301
Xylenes (total)94 01/05/2023 21419410070-1301
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 93 70-130
1,2-Dichloroethane-d4 90 70-130
Toluene-d8 94 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 88 of 104
Volatile Organic Compounds by GC/MS - LCSD
Batch:Prep Method:
Sample ID:YQ64266-003
64266 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
LimitDil(ug/L)(ug/L)
Acetone 170 01/06/2023 0047N17210060-1407.5 201
Acrylonitrile 100 01/06/2023 004710510070-1305.1 201
Benzene 48 01/06/2023 0047965070-1303.2 201
Bromochloromethane 48 01/06/2023 0047965070-1304.2 201
Bromodichloromethane 46 01/06/2023 0047935070-1301.7 201
Bromoform 44 01/06/2023 0047885070-1300.93 201
Bromomethane (Methyl bromide)55 01/06/2023 00471105070-1303.4 201
2-Butanone (MEK)140 01/06/2023 0047N13810070-1300.38 201
Carbon disulfide 50 01/06/2023 00471015070-1302.1 201
Carbon tetrachloride 49 01/06/2023 0047975070-1304.7 201
Chlorobenzene 48 01/06/2023 0047965070-1300.90 201
Chloroethane 48 01/06/2023 0047965070-1300.65 201
Chloroform 47 01/06/2023 0047945070-1304.1 201
Chloromethane (Methyl chloride)49 01/06/2023 0047995060-1400.20 201
1,2-Dibromo-3-chloropropane (DBCP)44 01/06/2023 0047885070-1305.9 201
Dibromochloromethane 46 01/06/2023 0047925070-1300.91 201
1,2-Dibromoethane (EDB)48 01/06/2023 0047955070-1300.44 201
Dibromomethane (Methylene bromide)50 01/06/2023 00471015070-1303.4 201
trans-1,4-Dichloro-2-butene 40 01/06/2023 0047+8050 70-13024 201
1,2-Dichlorobenzene 48 01/06/2023 0047975070-1303.9 201
1,4-Dichlorobenzene 47 01/06/2023 0047955070-1304.4 201
1,1-Dichloroethane 51 01/06/2023 00471015070-1303.9 201
1,2-Dichloroethane 52 01/06/2023 00471045070-1303.2 201
1,1-Dichloroethene 47 01/06/2023 0047935070-1303.8 201
cis-1,2-Dichloroethene 49 01/06/2023 0047995070-1302.7 201
trans-1,2-Dichloroethene 50 01/06/2023 0047995070-1303.0 201
1,2-Dichloropropane 50 01/06/2023 00471005070-1301.8 201
cis-1,3-Dichloropropene 49 01/06/2023 0047985070-1301.4 201
trans-1,3-Dichloropropene 47 01/06/2023 0047955070-1302.4 201
1,4-Dioxane 790 01/06/2023 0047N15750060-14011 201
Ethylbenzene 48 01/06/2023 0047965070-1300.77 201
2-Hexanone 130 01/06/2023 0047N13110070-1302.1 201
Methyl iodide (Iodomethane)50 01/06/2023 00471005070-1303.3 201
4-Methyl-2-pentanone 100 01/06/2023 004710010070-1300.49 201
Methylene chloride 51 01/06/2023 00471025070-1304.0 201
Styrene 48 01/06/2023 0047965070-1300.51 201
1,1,1,2-Tetrachloroethane 47 01/06/2023 0047955070-1300.59 201
1,1,2,2-Tetrachloroethane 48 01/06/2023 0047955070-1302.8 201
Tetrachloroethene 47 01/06/2023 0047935070-1301.8 201
Tetrahydrofuran 54 01/06/2023 00471075070-1302.8 201
Toluene 49 01/06/2023 0047975070-1300.93 201
1,1,1-Trichloroethane 48 01/06/2023 0047965070-1305.0 201
1,1,2-Trichloroethane 48 01/06/2023 0047975070-1300.44 201
Trichloroethene 47 01/06/2023 0047945070-1303.5 201
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 89 of 104
Volatile Organic Compounds by GC/MS - LCSD
Batch:Prep Method:
Sample ID:YQ64266-003
64266 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
LimitDil(ug/L)(ug/L)
Trichlorofluoromethane 52 01/06/2023 00471035070-1300.72 201
1,2,3-Trichloropropane 47 01/06/2023 0047945070-1305.6 201
Vinyl acetate 44 01/06/2023 0047875060-1404.9 201
Vinyl chloride 51 01/06/2023 00471025070-1303.0 201
Xylenes (total)93 01/06/2023 00479310070-1301.4 201
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 93 70-130
1,2-Dichloroethane-d4 93 70-130
Toluene-d8 93 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 90 of 104
Volatile Organic Compounds by GC/MS - MB
Batch:Prep Method:
Sample ID:YQ64454-001
64454 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Acetone ND 01/09/2023 1452205.0 ug/L1
2-Butanone (MEK)ND 01/09/2023 1452102.0 ug/L1
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 102 70-130
1,2-Dichloroethane-d4 102 70-130
Toluene-d8 107 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 91 of 104
Volatile Organic Compounds by GC/MS - LCS
Batch:Prep Method:
Sample ID:YQ64454-002
64454 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
Acetone 83 01/09/2023 13118310060-1401
2-Butanone (MEK)91 01/09/2023 13119110070-1301
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 104 70-130
1,2-Dichloroethane-d4 97 70-130
Toluene-d8 102 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 92 of 104
Volatile Organic Compounds by GC/MS - MS
Batch:Prep Method:
Sample ID:XL31002-010MS
64454 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
Limit
Sample
Amount
Dil(ug/L)(ug/L)(ug/L)
Acetone 700 01/09/2023 1903N35100060-14035010
2-Butanone (MEK)1400 01/09/2023 190373100070-13072010
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 110 70-130
1,2-Dichloroethane-d4 98 70-130
Toluene-d8 111 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 93 of 104
Volatile Organic Compounds by GC/MS - MSD
Batch:Prep Method:
Sample ID:XL31002-010MD
64454 5030B
Analytical Method:8260D
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
Limit
Sample
Amount
Dil(ug/L)(ug/L)(ug/L)
Acetone 700 01/09/2023 1926N35100060-1400.35 2035010
2-Butanone (MEK)1500 01/09/2023 192674100070-1300.64 2072010
Surrogate Q % Rec
Acceptance
Limit
Bromofluorobenzene 103 70-130
1,2-Dichloroethane-d4 95 70-130
Toluene-d8 106 70-130
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 94 of 104
ICP-MS Metals - MB
Batch:Prep Method:
Prep Date:
Sample ID:YQ63980-001
63980 3005A
01/03/2023 1530Analytical Method:6020B
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Antimony ND 01/05/2023 00182.0 0.50 ug/L1
Arsenic ND 01/05/2023 00182.0 1.3 ug/L1
Barium ND 01/05/2023 00185.0 1.3 ug/L1
Beryllium ND 01/05/2023 00180.40 0.15 ug/L1
Cadmium ND 01/05/2023 00180.50 0.13 ug/L1
Chromium ND 01/05/2023 00185.0 1.3 ug/L1
Cobalt ND 01/05/2023 00185.0 1.3 ug/L1
Copper ND 01/05/2023 00185.0 1.3 ug/L1
Lead ND 01/05/2023 00181.0 0.25 ug/L1
Nickel ND 01/05/2023 00185.0 1.3 ug/L1
Selenium ND 01/05/2023 00185.0 1.3 ug/L1
Silver ND 01/05/2023 00181.0 0.25 ug/L1
Thallium ND 01/05/2023 00180.50 0.15 ug/L1
Vanadium ND 01/05/2023 00185.0 2.5 ug/L1
Zinc ND 01/05/2023 0018102.5 ug/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 95 of 104
ICP-MS Metals - LCS
Batch:Prep Method:
Prep Date:
Sample ID:YQ63980-002
63980 3005A
01/03/2023 1530Analytical Method:6020B
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
Antimony 96 01/05/2023 00289610080-1201
Arsenic 92 01/05/2023 00289210080-1201
Barium 92 01/05/2023 00289210080-1201
Beryllium 94 01/05/2023 00289410080-1201
Cadmium 110 01/05/2023 002810510080-1201
Chromium 98 01/05/2023 00289810080-1201
Cobalt 100 01/05/2023 002810110080-1201
Copper 100 01/05/2023 002810310080-1201
Lead 110 01/05/2023 002810510080-1201
Nickel 100 01/05/2023 002810010080-1201
Selenium 86 01/05/2023 00288610080-1201
Silver 92 01/05/2023 00289210080-1201
Thallium 110 01/05/2023 002810710080-1201
Vanadium 96 01/05/2023 00289610080-1201
Zinc 98 01/05/2023 00289810080-1201
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 96 of 104
ICP-MS Metals - MS
Batch:Prep Method:
Prep Date:
Sample ID:XL31002-002MS
63980 3005A
01/03/2023 1530Analytical Method:6020B
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
Limit
Sample
Amount
Dil(ug/L)(ug/L)(ug/L)
Antimony 110 01/05/2023 021310610075-125ND1
Arsenic 100 01/05/2023 021310110075-125ND1
Barium 230 01/05/2023 021310310075-1251201
Beryllium 100 01/05/2023 02139910075-1250.19 1
Cadmium 110 01/05/2023 021311210075-1250.24 1
Chromium 100 01/05/2023 021310010075-125ND1
Cobalt 150 01/05/2023 02139810075-125491
Copper 100 01/05/2023 021310110075-1253.1 1
Lead 100 01/05/2023 021310510075-125ND1
Nickel 100 01/05/2023 02139910075-1252.7 1
Selenium 97 01/05/2023 02139710075-125ND1
Silver 94 01/05/2023 02139410075-125ND1
Thallium 100 01/05/2023 021310410075-1250.26 1
Vanadium 99 01/05/2023 02139910075-125ND1
Zinc 110 01/05/2023 021310910075-1254.2 1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 97 of 104
ICP-MS Metals - MSD
Batch:Prep Method:
Prep Date:
Sample ID:XL31002-002MD
63980 3005A
01/03/2023 1530Analytical Method:6020B
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date% RPD
%Rec
Limit
% RPD
Limit
Sample
Amount
Dil(ug/L)(ug/L)(ug/L)
Antimony 110 01/05/2023 022310610075-1250.0052 20ND1
Arsenic 100 01/05/2023 022310210075-1250.75 20ND1
Barium 230 01/05/2023 022310310075-1250.21 201201
Beryllium 100 01/05/2023 022310010075-1250.35 200.19 1
Cadmium 110 01/05/2023 022311110075-1250.60 200.24 1
Chromium 100 01/05/2023 022310010075-1250.27 20ND1
Cobalt 150 01/05/2023 02239910075-1250.68 20491
Copper 110 01/05/2023 022310210075-1250.97 203.1 1
Lead 100 01/05/2023 022310310075-1252.1 20ND1
Nickel 100 01/05/2023 02239910075-1250.42 202.7 1
Selenium 100 01/05/2023 022310010075-1252.3 20ND1
Silver 94 01/05/2023 02239410075-1250.40 20ND1
Thallium 100 01/05/2023 022310210075-1251.6 200.26 1
Vanadium 99 01/05/2023 02239910075-1250.015 20ND1
Zinc 110 01/05/2023 022310910075-1250.0027 204.2 1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 98 of 104
ICP-MS - MB
Batch:Prep Method:
Prep Date:
Sample ID:YQ63980-001
63980 3005A
01/03/2023 1530Analytical Method:6020B
Matrix:Aqueous
Parameter Result Q LOQ DL Units Analysis DateDil
Arsenic ND 01/05/2023 00182.0 1.3 ug/L1
Barium ND 01/05/2023 00185.0 1.3 ug/L1
Cadmium ND 01/05/2023 00180.50 0.13 ug/L1
Chromium ND 01/05/2023 00185.0 1.3 ug/L1
Lead ND 01/05/2023 00181.0 0.25 ug/L1
Selenium ND 01/05/2023 00185.0 1.3 ug/L1
Silver ND 01/05/2023 00181.0 0.25 ug/L1
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 99 of 104
ICP-MS - LCS
Batch:Prep Method:
Prep Date:
Sample ID:YQ63980-002
63980 3005A
01/03/2023 1530Analytical Method:6020B
Matrix:Aqueous
Parameter
Result
Q % Rec
Spike
Amount
Analysis Date
%Rec
LimitDil(ug/L)(ug/L)
Arsenic 92 01/05/2023 00289210080-1201
Barium 92 01/05/2023 00289210080-1201
Cadmium 110 01/05/2023 002810510080-1201
Chromium 98 01/05/2023 00289810080-1201
Lead 110 01/05/2023 002810510080-1201
Selenium 86 01/05/2023 00288610080-1201
Silver 92 01/05/2023 00289210080-1201
Note:Calculations are performed before rounding to avoid round-off errors in calculated results
LOQ = Limit of Quantitation ND = Not detected at or above the DL
J = Estimated result < LOQ and > DL
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40%
+ = RPD is out of criteria
_DL = Detection Limit
* = RSD is out of criteria
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

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Chain of Custody
and
Miscellaneous Documents
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

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PACE ANALYTICAL SERVICES, LLC

106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

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PACE ANALYTICAL SERVICES, LLC

106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)

Page 103 of 104