7607_GreatOakMSWLF_RevisedOperationsPlan_FID1324065_20190717

Revised July 17, 2019 1
1. Revised by Waste Management.

2520 Whitehall Park Dr., Suite 450, Charlotte, NC 28273 | 704-504-3107
Environmental Consultants & Contractors

July 17, 2019
File No. 02215305.10

MEMORANDUM
TO: Ming-tai Chao
Environmental Engineer, Solid Waste Section
North Carolina Department of Environmental Quality

FROM: Steve Lamb, SCS Engineers, PC
(On behalf of Waste Management of Carolinas, Inc.)

SUBJECT: Revisions to Operations Plan
Great Oak Landfill
Permit Number 7607-MSWLF-2015

SCS Engineers, PC on behalf of Waste Management of Carolinas, Inc. respectfully submits the
attached revised Operations Plan for the Great Oak Landfill. The current plan was last revised on
December 2, 2016 (DIN 27122).

The proposed Operations Plan revisions/additions include:

• Adding the use of spray-applied mortar coating as an alternative daily cover (ADC). Page
12 from the Operations Plan was revised to address the use of spray-applied mortar
coating (SMC) as an ADC.
• Adding Tipper operations. The use of tippers was included in Section 3.2.4 (Page 12) of
the Operations Plan. A notation on Page 12 was added to reference this modification for
additional tipper operational information.
• Adding the option to use landfill subcell temporary separation berms. See below for
additional information.
• Subdividing Cell 3 into two (2) subcells, designated as Cell 3A and Cell 3B. Dividing Cell
3 into two subcells was addressed in a minor permit modification (SCS Engineers, July
2019). The plan for the Cells 3A/3B is attached.

Revised Operations Plan Great Oak Landfill
July 17, 2019
TIPPER OPERATIONS
The waste handling and unloading procedures may involve operation of a portable trailer tipper. If
utilized, the tipper will be positioned near the working face area, leveled, and operated according to
manufacturer’s instructions to extract the waste from transport vehicles, as appropriate. Trailers
shall be disconnected and secured to tipper according to manufacturer’s instructions prior to
initiation of tipping cycle. Safety protocols shall include prohibiting personnel from standing on tilting
platform or below discharge chute during tipping cycle. Tipper capacity and maximum tilt angle will
vary per manufacturer and equipment model.
SUBCELL TEMPORARY SEPARATION BERMS
When landfill cells are divided into subcells, a temporary separation berm will be constructed where
the subcells join to delineate the active cell containing waste from either a cell area to be
constructed or a constructed cell containing no waste. When an entire landfill cell is not
constructed, creating subcells, and a temporary separation berm is used, the primary and secondary
geomembrane liners will be welded together and anchored into to the soil subgrade.

The berm will be constructed of on-site soils with a geomembrane liner cover or flap welded to the
subcell primary geomembrane liner on the opposite side of the active subcell. This is to prevent
stormwater run-on into the active subcell and to prevent leachate from exiting the active subcell.
Leachate collection (LC) and leak detection (LD) high density polyethylene (HDPE) pipe penetrations
through the berm for future connection shall be sealed with a geomembrane boot extrusion welded
to the berm geomembrane and HDPE pipes. The LC and LD pipe berm penetrations will be
terminated with a blind flange and gasket fastened with threaded bolts, washers, and nuts.

The temporary separation berm will be inspected by landfill personnel following a significant rainfall
event. A pump or other dewatering mechanism will made available to landfill personnel to evacuate
stormwater accumulated at the berm, if needed. Stormwater that comes in contact with waste is
leachate and stormwater that does not come in contact with waste can be released as stormwater.
If repairs or alterations are needed to maintain the berm’s function, they will be made as soon as
practical. Temporary separation berms will be removed prior to waste placement.

Waste placement within a constructed landfill subcell will be kept a minimum 10-foot from the
interior toe of the temporary separation berm.

M:\PROJECT FILES\02215305.10\Operations Plan\Permit Modification - Revised OPs Plan_7-17-19.docx
CELL 5(4.6 ACRES)CELL 1A(7.3 ACRES)CELL 1B(8.2 ACRES)CELL 7(4.8 ACRES) CELL 6(5.0 ACRES)CELL 2(10.0 ACRES) CELL 3B(3.12 ACRES) CELL 3A(8.48 ACRES)CELL 4(4.8 ACRES)DUKEENERGYEASEMENT DUKEENERGYEASEMENT
SCS ENGINEERS, PC
2520 WHITEHALL PARK DRIVE, SUITE 450
CHARLOTTE, NORTH CAROLINA 28273
PHONE: [phone] FAX: [phone]
1BASE GRADES PLAN - PHASE 101
GREAT OAK LANDFILLWASTE MANAGEMENT OF CAROLINAS, INC.
3597 OLD CEDAR FALLS ROAD
RANDLEMAN, NORTH CAROLINA 27317
Revised July 17, 2019
Revised July 17, 2019
Revised July 17, 2019