Copy of High Acres Landfill Operational Updates 9/28/2026

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ATTENTION RESIDENTIAL DROP-OFF USERS:

RESIDENTIAL CARDBOARD RECYCLING ONLY

· MUST BE BROKEN & FLATTENED DOWN

· MUST BE ABLE TO FIT IN 96-GALLON RECYCLING TOTER

All others will be turned away as the Residential Drop-Off Facility is intended to replace your at-home waste/recycling needs only. NOT FOR COMMERCIAL USE.

Daily Operations:

The active working face is currently located in cells 13 and 15. The working face is processing both rail and street volume and is utilizing clean soil, approved alternative daily cover and the Envirocover machine. The perimeter water/vapor-based neutralizer systems, and truck wash are also in operation.

NYSDEC Odor Hotline and Verification System: (585) 453-2416

A dedicated odor hotline and verification system for residents to report and record any concerns regarding High Acres Landfill and its operation.

Neutralizer Systems in use:

Daily Cover Enviro Cover Machine in use:

Construction Activities:

We will employ all necessary odor control measures. Our contractors understand that keeping odors to a minimum is a top priority, and we will provide appropriate oversight on construction activities.

Horizontal Installation Update

Installation of the horizontal system is expected to take place over the next couple of weeks. During this process, Waste Management will utilize all available measures and operational practices to effectively manage and minimize odors throughout the installation period.

We appreciate your patience and understanding as we work to complete this project safely and efficiently.

Over the next three to four weeks, we will be installing a 12-inch gas header at High Acres in Cell 15. This gas header construction consists of approximately 1350 LF of header pipe and multiple lateral connections to gas wells. This involves excavation and trenching into the waste mass for the pipe installation and may cause some short-term odor. We will expedite this construction effort as quickly as we can over the next 3-4 weeks.

June 2026 Groundwater geocomposite being deployed on Cell 14A subgrade.

Temporary odors may occur during trenching and construction activities necessary for project completion and future improvements.

Renewable Energy Powerplant and Landfill Gas Management:

May 2026 (Projected to come online by the end of Q3/4) Building a State-of-the-Art Renewable Natural Gas (RNG) Facility in the Town of Macedon, on High Acres Landfill Property. This project will beneficially utilize landfill gas that is generated when organic material decomposes in a landfill. This RNG Facility will eventually replace High Acres' existing landfill gas-to-electric with landfill gas to pipeline (RNG). — **May 2026 (Projected to come online by the end of Q3/4) Building a State-of-the-Art Renewable Natural Gas (RNG) Facility in the Town of Macedon, on High Acres Landfill Property.** This project will beneficially utilize landfill gas that is generated when organic material decomposes in a landfill. This RNG Facility will eventually replace High Acres' existing landfill gas-to-electric with landfill gas to pipeline (RNG).

Continuous use of gas collection wells and flares for odor control. Ongoing work includes raising gas collection wells, installing additional horizontal gas collectors, installing gas vacuum lines, and upgrading the gas collection wells for drainage and collection enhancement. Well-raising is a daily activity in coordination with filling operations.

Landfill Gas Well Installation Project

Project Start Date: July 23, 2026

High Acres Landfill has begun a landfill gas collection system expansion project in Cells 12 and 13. The project includes the installation of eight new gas collection wells and approximately 550 feet of gas collection piping to support ongoing landfill gas management operations.

Construction activities are expected to continue for approximately two weeks, weather dependent. Work will be limited to weekdays.

Odor Control Measures

Maintaining odor control throughout this project is a top priority. The following measures are being implemented during drilling and construction activities:

All drill cuttings will be immediately transported and disposed of in the active landfill area.
Boreholes will be drilled using a vacuum hood system to minimize odor emissions.
Boreholes will be promptly covered and will not be left open overnight.
Contractor activities will be closely monitored to ensure all odor control and operational requirements are followed.

High Acres Landfill Gas Collection System Expansion Update

As part of routine landfill operations at High Acres, gas collection infrastructure continues to be installed as waste placement progresses and the landfill footprint expands. Gas wells, collection piping, and conveyance systems are added in coordination with filling activities to ensure appropriate gas collection coverage throughout active disposal areas.

Current construction activities include:

Extension of a 12-inch gas conveyance subheader by approximately 700 feet.
Installation of approximately 600 feet of 6-inch vacuum piping to serve active disposal areas.
Construction of a 400-foot horizontal gas collection well in the northeastern portion of the landfill to support gas collection as filling advances.
Installation of approximately 1,200 feet of 6-inch perforated gas collection piping in the southeastern section of the landfill, which is expected to be commissioned in the coming weeks.

These improvements provide the gas collection and conveyance capacity necessary to support ongoing landfill operations and maintain effective gas management throughout the site.

The project remains on schedule and is expected to be completed by the second week of October. Construction activities are being conducted safely and efficiently, with efforts focused on minimizing offsite impacts wherever practicable.

Community and News:

NEW! 2026 WM Sustainability Report - WM is committed to consistent and meaningful public disclosure and discussion of our sustainability progress through the publication of our annual Sustainability Report. Read the PDF below to learn more.