3402_HanesMillRdMSWLF_MSEWall_Aklignment_samplingplan_FID1286106_20190308i

hdrinc.com
440 S Church Street, Suite 1000, Charlotte, NC 28202-2075
704.338.6700

Geotechnical Drilling and Laboratory Testing Program
Permitting and detailed design of the MSE wall will require a geotechnical drilling and laboratory
testing program to evaluate foundation conditions along the proposed wall alignment and to obtain
typical properties of the soils that will be used to construct the wall. This information will be used in
combination with previous geotechnical studies at the site to determine if localized foundation
improvement, such as undercutting of unsuitable soils and replacement with compacted structural
fill, will be required within the alignment. The geotechnical information will also allow the
determination of typical soil parameters that will be used for detailed wall design, refining the MSE
wall stability analyses performed during the preliminary MSE wall design, and estimating wall
settlement along the proposed alignment. For estimating purposes, the MSE wall alignment is
anticipated to include nearly the entire east and south sides of the landfill for a total length of
approximately 5,300 linear feet. The alignment is assumed to be located predominantly along the
existing landfill perimeter road. The proposed geotechnical drilling and laboratory testing program
will include the following:
• HDR will either self-perform or contract with a licensed drilling company to perform
exploratory Standard Penetration Test (SPT)/Shelby Tube borings along the proposed MSE
wall alignment at an average spacing of 200 feet for a total of approximately 27 borings
along the estimated 5,300-foot alignment. The number of borings may be reduced if the
existing subsurface information is deemed viable for final design purposes. The spacing of
these borings may be adjusted to concentrate on areas where suspect foundation
conditions exist or where existing geotechnical information is minimal. Proposed drilling
locations will be flagged in the field by a senior engineer. HDR will provide a geologist or
geotechnical engineer to coordinate drilling activities in the field and log the borings in
general accordance with ASTM D2488. Borings will be performed to depths up to 80 feet
with the majority being 40 feet in depth or to auger refusal. The boring depth is based on
two times the wall height which has been estimated to range from 20 to 40 feet. SPT blow
counts will be obtained at 5-foot depth intervals along with split-spoon soil samples.
Borings will be terminated early upon auger refusal. A total of 10 Shelby tube samples will
be obtained during the drilling activities to obtain relatively undisturbed soil samples for
geotechnical laboratory testing. Rock coring will not be performed. Following the
completion of each boring, the boreholes will be abandoned by pumping a cement-
bentonite grout into them in accordance with NCDEQ requirements. Due to the existence
of extensive groundwater monitoring data at the site, no new piezometers or monitoring
wells will be installed as part of this scope.
• Soil samples obtained during the drilling program will be shipped to HDR’s soils laboratory
for geotechnical testing. The testing will include the following:
City of Winston-Salem | Solid Waste Management
MSE Wall Design Project
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Laboratory Classification (ASTM D2487) – 54 samples
Atterberg Limits (ASTM D4318) – 54 samples
Moisture Content (ASTM D2216) – 54 samples
Consolidated Undrained Triaxial Compression (ASTM D4767) - 5 samples
One-Dimensional Consolidation (ASTM D4186) – 5 samples
• HDR will obtain 5 bulk soil samples from the borrow/stockpile area at the landfill in order to
characterize the properties of the soil that may be used to construct the MSE wall. After
collection, the samples will be shipped to HDR’s soils laboratory and each sample will be
tested for the following:
Laboratory Classification (ASTM D2487)
Atterberg Limits (ASTM D4318)
Moisture Content (ASTM D2216)
Standard Proctor Compaction (ASTM D698)
Consolidated Undrained Triaxial Compression (ASTM D4767) – recompacted to
95% maximum dry density per ASTM D698.
• HDR will summarize the information obtained from the drilling and geotechnical laboratory
testing program in a geotechnical report. The report will include a discussion of subsurface
conditions encountered and whether subsurface improvement is recommended along the
proposed MSE wall alignment. The report will finalize the stability analyses based on the
information obtained. The report will include recommendations for MSE wall soil backfill
strength parameters that can be used by the geogrid reinforcement manufacturer for design
of the MSE wall. Boring logs, geotechnical laboratory testing data, and the finalized
stability analyses will be included as appendices to the report.
Assumptions
• The numbers of borings and geotechnical tests proposed assume that no significant
adverse soil conditions will be encountered along the proposed MSE wall alignment that will
require further delineation.
• The proposed drilling and geotechnical laboratory testing program is not intended to assess
environmental conditions at the site.
City of Winston-Salem | Solid Waste Management
MSE Wall Design Project
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• Boring and sampling locations will be documented using a handheld GPS device.
Surveying of locations is not included.

City of Winston-Salem | Solid Waste Management
MSE Wall Design Project
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HDR appreciates this opportunity to provide continued service to the City. Should you have any
questions regarding this proposal, please do not hesitate to contact me at [phone].
Sincerely,
HDR Engineering, Inc. of the Carolinas

Michael D. Plummer, PE
Project Engineer

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X X X XXXXXXX945.4940930 830900910920N: 890311.05E: 1616900.17EL: 939.31N: 889737.71E: 1616960.77EL: 922.06SEDIMENT BASIN NO. 1GAS EXTRACTIONWELL (TYP.)LEACHATE ENCLOSURE NO. 2LEACHATE ENCLOSURE NO. 1MW-813MW-809MW-810MW-811MW-808MW-815MW-816MW-817MW-801MW-802MW-803MW-805MW-806MW-807MW-804MW-812MW-830MW-828MW-825MW-831MW-829MW-826MW-814MW-827MW-824MW-818MW-819MW-820MW-821MW-822MW-823MW-19MW-18MW-17MW-16MW-15MW-14MW-13MW-12MM-8MM-7MM-6MM-5MM-4MM-3MM-2MM-1C/O INV.844.09C/O INV.842.48C/O INV.841.00C/O INV.839.48C/O INV.837.87C/O INV.836.62C/O INV.835.29C/O INV.834.43C/O INV.833.72C/O INV.832.92C/O INV.831.96C/O INV.830.92C/O INV.829.93C/O INV.828.62C/O INV.826.93C/O INV.827.02C/O INV.827.84C/O INV.827.87C/O INV.827.96C/O INV.828.12C/O INV.827.97C/O INV.828.10C/O INV.829.46C/O INV.830.38C/O INV.830.40C/O INV.845.62DROP INLETRIM 818.02INV. 810.24 36" RCPINV. 809.31
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INV. 809.34DROP INLETRIM 821.81INV. 810.66
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INV. 812.54DROP INLETRIM 824.38C/L INV. 810.88INV. IN 811.88INV. 810.0736" RCP
DROP INLETRIM 813.32INV. 808.22INV. 807.4736" RCPDROP INLETRIM 812.90INV. 807.10INV. 805.4136" RCPEND AS
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050+0053+25SEDIMENT BASIN NO. 4CENTERLINE OF PROPOSEDMSE WALL ACCESS ROADVAULT NO. 5VAULT NO. 6VAULT NO. 4VAULT NO. 3VAULT NO. 2VAULT NO. 1DROP INLETDROP INLETDROP INLETDROP INLETDROP INLETLEACHATE FORCEMAINLFG HEADER100 YEARFLOODPLAINSEDIMENT BASIN ALANDFILLACCESS ROADSEDIMENT BASIN NO. 2START MSE WALLSTA. 0+00SEDIMENT BASIN NO. 3END MSE WALLSTA. 53+80.01FUTURE PHASE 3WATER TRUCK FILL STATIONACTIVECELL 2ACTIVECELL 4EXISTINGSTOCKPILEAREAACTIVECELL 3CONSTRUCTEDCELL 5CONCRETE ASPHALT AND BRICKSTORAGE/MANAGEMENT AREAPROPERTYLINELEACHATE FACILITIESGRASSY CREEKCONDENSATESUMP-2ACTIVECELL 1HANES MILL ROAD LANDFILLMSE WALL PROJECT1ABC2345678DISSUEDESCRIPTIONPROJECT MANAGERPROJECT NUMBER01"2"FILENAMESCALESHEETDATEPROJECT ENGINEERSTRUCTURAL PLUMBINGELECTRICALDRAWN BYHDR Engineering, Inc. of the Carolinas440 S Church Street, Suites 900 & 1000Charlotte, NC 28202-2075704.338.6700N.C.B.E.L.S. License Number: F-0116EXISTING CONDITIONS00C-01.dwg1" = 150'00C-01M.D. PLUMMER, P.E.10110265T. YANOSCHAK, P.E.L. MCCAULA05/20181.AERIAL PHOTOGRAPHIC SURVEY FOR HANES MILL LANDFILL BY CARTOGRAPHIC AERIAL MAPPING, INC. DATED JANUARY 2, 2010. AERIAL PHOTOGRAPHIC SURVEYFOR HANES MILL LANDFILL WITHIN CELLS 1-5 AND THE STOCKPILES BY CARTOGRAPHIC AERIAL MAPPING, INC. DATED JANUARY 1, 2018. TOPOGRAPHIC DATA FORAREAS OUTSIDE THE HANES MILL LANDFILL PROPERTY WAS TAKEN FROM FORSYTH COUNTY GIS. THE GRID AND THE COORDINATES SHOWN FOR 2018 SURVEYHEREON ARE REFERENCED TO THE NORTH CAROLINA STATE PLANE COORDINATE SYSTEM, NORTH AMERICAN DATUM 83 (2011) AND ALL ELEVATIONS ARE BASEDON NORTH AMERICAN VERTICAL DATUM NAVD 88. DATUM FOR PREVIOUS AERIAL SURVEY IN 2010 IS NAD 83, NGVD 1929.2.PROPERTY BOUNDARY INFORMATION WEST OF NORFOLK SOUTHERN RAILROAD PROVIDED FROM A BOUNDARY SURVEY PERFORMED BY THOMAS A. RICCIO ANDASSOCIATES, R.L.S. DATED AUGUST-SEPTEMBER 1991.3.PROPERTY BOUNDARY INFORMATION TAKEN FROM COMPILATION PLAT PROVIDED BY BRADY SURVEYING.4.FLOODPLAIN INFORMATION OBTAINED FROM FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA) NATIONAL FLOOD HAZARD LAYER (NFHL) FOR FORSYTH,NORTH CAROLINA ITEM ID 37067C-NFHL PUBLISHED JUNE 16, 2016.CLOSED WASTE LIMITSBUILDINGSRAILROADFENCETREESPERMITTED LIMITS OF LINED LANDFILL LEGENDPROPERTY LINEOVERHEAD POWER LINE100 YEAR FLOOD PLAINCELL CONSTRUCTION LIMITSPIEDMONT NATURAL GAS EASEMENTSEWER EASEMENTWATERLINE EASEMENTRIGHT OF WAYCONTROL POINTNOTESLANDFILL GAS WELLSMW-12MM-1METHANE GASMONITORING WELLFORCEMAIN VAULTDROP INLETSTORMWATER RISERCLEANOUTSC/OCENTERLINE OF MSE WALL ACCESS ROADLEACHATE FORCEMAINLANDFILL GAS HEADER PIPELANDFILL GAS LATERALMSE WALL CONSTRUCTION BASELINEWATER LINEGROUND-WATERMONITORING WELLB-1B-2B-3B-4B-5B-6B-7B-8B-9B-10B-11B-12B-13B-14B-15B-16B-17B-18B-19B-20B-21OFFSET 20' WEST TO AVOID RCPOFFSET WEST TO CENTER OF ROAD TO AVOID FM AND WATER LINEOFFSET WEST TO CENER OF ROAD TO AVOID FM AND WATER LINEOFFSET WEST TO CENTER OF ROAD TO AVOID FMOFFSET WEST TO CENTER OF RAOD TO AVOID FMOFFSET WEST TO CENTER OF ROAD TO AVOID FM
[External] RE: MSE wall, Hanes Mill Road
MSWLF, 34-02
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Hey Ming,

Aached is the drilling layout and the boring/lab tesng plan for the MSE Wall
foundaon invesgaon. This plan was developed between Tensar and HDR in
order to gain adequate subsurface informaon to finalize the design of the MSE
Wall. The drilling crew began the work this week and will likely finish by next
week.

Thanks and have a great weekend!

Mike

Plummer, Michael <[e-mail]>
Fri 3/8/2019 3:02 PM
To:Chao, Ming-tai <[e-mail]>; Jan McHargue <[e-mail]>;
Cc:Stanley, Sherri <[e-mail]>; Heim, Susan A
<[e-mail]>;
2 attachments (3 MB)
WS Hanes Landfill Driling Plan.docx; Hanes Mill Road Landfill - Proposed Boring Plan with
Prel Location Comme.._.pdf;
Michael Plummer, PE
Solid Waste Section Manager

HDR
440 South Church Street, Suite 1000
Charlotte, NC 28202
D [704.338.6843] M [704.578.4031]
[e-mail]
hdrinc.com/follow-us

From: Chao, Ming-tai [mailto:[e-mail]]
Sent: Friday, March 8, 2019 1:05 PM
To: Jan McHargue <[e-mail]>
Cc: Plummer, Michael <[e-mail]>; Stanley, Sherri
<[e-mail]>; Heim, Susan A <[e-mail]>
Subject: MSE wall, Hanes Mill Road MSWLF, 34-02

Hi Jan: Happy Friday.

I am sending out this e-mail message to check on the status of the
proposed MSW wall around the active MSWLF unit. On 03/05/2019 NC
SWANA conference, you, mike and I briefly talked about the MSE wall,
and I recalled that Hanes Mill Road MSWLF planned to conduct a
subsurface investigation program along the proposed wall alignment in the
coming weeks. Could you please provide the SWS the tentative schedule
for this investigation program? So I can move my current assignments and
open the specific time frame to review the work plan of this investigation
program. Thank you for your help on this matter. Have a wonderful
weekend.

Ming-Tai Chao, P.E.
Environmental Engineer
Permitting Branch, Solid Waste Section
NCDEQ, Division of Waste Management
(Mailing Address)
1646 Mail Service Center
Raleigh, NC 27699-1646
(Street Address)
Green Square, 217 West Jones Street
Raleigh, NC 27603
Tel. [phone]
[e-mail]
http://portal.ncdenr.org/web/wm/sw
NC DEQ: Solid Waste Section
portal.ncdenr.org
Building 217 W Jones Street Raleigh, NC 27603 Phone [phone]
Mail 1646 Mail Service Center Raleigh, NC 27699-1646

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