6013_Mecklenburg_GreenwayWaste_NorthMeck_CDLF_MRF_PostBlastingReport_FID1442281_20200811

Via email to
iaclynne. drummond(aa»n cden r. ,-ov
August 11, 2020
NC DEQ
Solid Waste Section
1646 Mail Service Center
Raleigh, NC 27699-1646
Attention: Ms. Jackie Drummond
Re: Post -Blasting Shallow Groundwater Elevation Report
Greenway Waste Solutions at North Meck C&D Landfill
Huntersville, NC
Dear Jackie:
Greenway Recycling of North Meck, LLC (GWRNM) is submitting this letter report to
document and discuss the results of shallow groundwater elevation monitoring during bedrock
blasting activities associated with the construction of a Material Recycling Facility (MRF) at the
Greenway Waste Solutions at North Meck, LLC (GWSNM) C&D Landfill. A site location map
is provided as Figure 1. Site layout map depicting monitoring well locations is provided as
Figure 2.
1.0 Site Description & Background
The subject Site is operated by GWSNM under Solid Waste Facility Permit Number 60-13. The
landfill facility address is 15300 Holbrooks Road, Huntersville, North Carolina (Site). As shown
in Figure 2, The active Infill Area consists of three landfill expansion areas:
1) Expansion Area 1— a closed C&D landfill cell on the west side of the facility;
2) Expansion Area 2—contains Phase 1, 2 and 3 C&D landfill cells on the east side of the
facility;
3) Infill Expansion Area —the active expansion area located in the saddle between
Expansion Areas 1 and 2.
B Gri& GmMers 0
Gfee�asre Solutions

The Infill Area is situated in the northern portion of the landfill property. The boundaries of the
Infill Area include additional GWSNM landfill property as well as land owned by Mecklenburg
County, including the David B. Waymer Flying Regional Park (a former unlined municipal solid
waste landfill - Holbrooks Road Landfill) to the north and east. An unnamed tributary of Cane
Creek bounds the Infill Area to the south, beyond which lies the Closed Phase I Area C&D
landfill. The west and northwest boundaries include private property, a Colonial Pipeline
easement, and land owned by the Town of Huntersville.
In early 2020, GWRNM began excavation activities in the northwest portion of the Site for the
purpose of constructing a MRF. During excavation activities, dense partially weathered rock
(PWR) and bedrock was encountered above the surveyed final grade elevation of the MRF base
grade. In May 2020, GWRNM contacted North Carolina Department of Environmental Quality
Solid Waste Section (NCDEQ SWS) via phone to discuss plans to perform blasting activities for
the purpose of removing PWR and bedrock in order to achieve the surveyed final floor grade for
the MRF. In an email dated May 19, 2020, the requested that GWRNM monitor water levels in
nearby monitoring wells MW-1(i) and MW-15(i) immediately before and after each round of
blasting, as well as one week after blasting, to ensure that blasting activities did not affect local
hydrogeologic conditions. GWRNM submitted a blasting plan to NCDEQ SWS on May 29,
2020, which was approved via email on June 1, 2020.
2.0 Methodology & Results
GWRNM contracted Carolina Blasting, Inc. to perform blasting activities at the Site. Blasting
was conducted as needed between June 4 and August 3 of 2020. GWRNM personnel were on -
site during each blasting event to collect water level measurements and observe blasting
activities. Depth -to -water measurements were collected with a decontaminated electronic water
level meter from MW-l(i) and MW-15(i) relative to the surveyed top of casing of each
monitoring well immediately before and immediately after each blasting event. The final round
of water level measurements was conducted on August 10, 2020, which was seven days after the
final blasting event conducted on August 3, 2020. A table detailing blasting dates and
groundwater elevation data is provided as Table 1.
2 B Gri& GmMers 0
Gfee�aste Solutions

3.0 Conclusions
Blasting activities associated with grading activities for construction of the Material Recycling
Facility at the Greenway Waste Solutions at North Meck C&D Landfill were conducted between
June 4 and August 3 of 2020. Water level measurements were collected from MW-1(i) and
MW-15(i) immediately before and immediately after each blasting event, as well as seven days
after the final blasting event, which took place on August 3, 2020.
As shown in Table 1, groundwater elevations remained generally stable during blasting
activities. Additionally, groundwater was not observed in the area of blasting.
After you have had a chance to review this submittal, please feel free to contact me at (914) 844-
7048 with any questions.
Sincerely,
Greenway Recycling of North Meck, LLC
000
Brandt Kayser, P.G.
Environmental Compliance Officer
Attachments:
Figure 1 Site Location Map
Figure 2 Site Layout Map
Table 1 Summary of Groundwater Elevation Data
Copies:
John Brown — GWRNM
3 B Gri& GmMers 0
Gfee�aste Solutions

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REFERENCE
U.S.G.S. 7.5' TOPOGRAPHIC MAP, CORNELIUS QUADRANGLE, NC DATED: 2016.
SCALE IN FEET
0 1000 2000
, 1AF IA
7
NORTH
REE WAY WASTE SOLUTIONS OF L
Civil & Environmental Consultants, Inc.
NORTH MECK, LLC
3701 Arco Corporate Drive - Suite 400 - Charlotte, NC 28273
Ph: 980.237.0373 - Fax: [phone]
SITE LOCATION MAP
www.cecinc.com
DRAWN BY: CTH
CHECKED BY: MBG
APPROVED BY: DMC
FIGURE NO.:
1
DATE:
1 DWG SCALE: 1 1000'1
PROJECT NO: 111-370.001
AUGUST 2020

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SURFACE WATER SAMPLING
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(i) REFERENCE TO INFILL AREA
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[1i i i GREENWAY WASTE SOLUTIONS OF
A AV AV NORTH MECK, LCC
Civil & Environmental Consultants, Inc. NORTH MECKLENBURG LANDFILL
1900 Center Park Drive - Suite A - Charlotte, NC 28217 HUNTERSVILLE, NORTH CAROLINA
REFERENCE Ph: 980.237.0373 - Fax: [phone] SITE LAYOUT MAP
SCALE IN FEET www.cecinc.com
1. AERIAL IMAGERY TAKEN FROM GOOGLE EARTH PRO. DRAWN BY: JKS/PAB CHECKED BY: EHS APPROVED BY: EHS ATTACHMENT:
DATED OCTOBER 8, 2016 0 400 800 DATE: August 2020 1 DWG SCALE: 1" = 400' PROJECT NO: 111-370.0001 2

Table 1 (Page 1 of 1)
Summary of Groundwater Elevation Data
Greenway Waste Recycling of North Meck, LLC
Huntersville, North Carolina
Well ID
MW-1 (i)
Top of Casing Elevation (ft msl) 740.71
MW-15 (i)
Top of Casing Elevation (ft msl) 752.69
Pre -Blasting
Post -Blasting
Pre -Blasting
Post -Blasting
Depth to
Groundwater
Depth to
Groundwater
Depth to
Groundwater
Depth to
Groundwater
Blasting Date
Groundwater
Elevation
Groundwater
Elevation
Groundwater
Elevation
Groundwater
Elevation
ft below TOC
feet msl
ft below TOC
feet msl
ft below TOC
feet msl
ft below TOC
feet msl
6/3/20
48.21
692.50
48.21
692.50
35.84
716.85
35.84
716.85
6/4/20
48.24
692.47
48.24
692.47
35.86
716.83
35.86
716.83
6/5/20
48.30
692.41
48.30
692.41
35.89
716.80
35.89
716.80
6/8/20
48.32
692.39
48.32
692.39
35.95
716.74
35.95
716.74
6/9/20
48.26
692.45
48.26
692.45
35.89
716.80
35.89
716.80
6/10/20
48.29
692.42
48.29
692.42
35.87
716.82
35.87
716.82
6/11 /20
48.22
692.49
48.22
692.49
35.80
716.89
35.80
716.89
6/12/20
48.18
692.53
48.18
692.53
35.76
716.93
35.76
716.93
6/22/20
48.13
692.58
48.13
692.58
35.69
717.00
35.69
717.00
6/30/20
48.16
692.55
48.16
692.55
35.66
717.03
35.66
717.03
8/3/20
49.44
691.27
49.44
691.27
36.35
716.34
36.35
716.34
8/10/20
48.68
692.03
36.48
716.21
Notes:
TOC = Surveyed well top -of -casing elevation
feet msl = feet above mean sea level
Table 1 (Page 1 of 1)
Greenway Recycling of North Meck, LLC