Landfill Equipment Cleaning: A High-Contamination Protocol

A landfill compactor or a transfer station loader works in material that a construction machine never touches: household waste, food, medical and hygiene products, leachate, dead animals and everything else that arrives on the tipping floor. The machine comes out of it coated in a mix that is corrosive, that carries pathogens and that smells strongly enough to affect the operator and anyone working on the machine. Cleaning it is not a job for a garden hose and a Saturday afternoon.

This guide sets out a high-contamination cleaning protocol for waste-handling equipment at Metro Atlanta landfills and transfer stations: what the contamination does to the machine, how to plan the cleaning around tipping hours, how to protect the crew, how to disinfect, and how to recover the wash water so the site's permit is not put at risk by the cleaning itself.

What Waste Does to a Machine

Leachate, the liquid that drains from decomposing waste, ranges from acidic to mildly alkaline depending on the waste, is high in dissolved solids and salts, and is corrosive to steel, aluminum and copper. On a compactor it runs into the wheel hubs, the cleaner fingers between the wheel teeth, the belly, the radiator and the cab floor, and it keeps corroding there until it is washed out. A compactor that is not cleaned regularly loses wheel teeth, hub seals and wiring harness insulation faster than any other cost on the site.

Then there is the material that wraps. Plastic film, strapping, rope, carpet and wire wind onto axles, around drive shafts and into the compactor wheel cleaner fingers. Wrapped material overheats bearings and seals, and it is the leading cause of the fires that start in the belly of a landfill machine. Cleaning the belly pan and the axles is a fire prevention step before it is anything else.

Dust and organics also pack the radiator, the hydraulic cooler and the engine compartment. A loader on a transfer station floor that overheats in July is usually one with a radiator core blocked by paper fiber and food waste, and the fix is a proper wash rather than another fan reversal.

Scheduling Around Tipping Hours

Waste sites run on tipping hours, and a machine that is out of service while trucks are queued on the scale is a problem for the whole county. The cleaning has to fit the windows: the hour before the gate opens, the hour after the last truck, and whatever the site's closed days are. Sunday morning at a transfer station and the pre-dawn window at a landfill are where most of the cleaning gets done.

A full high-contamination wash on a landfill compactor takes two to four hours with a two-person crew and hot water at 4 to 8 gallons per minute. Dozers and loaders take one to two hours. That means a fleet of five or six machines needs the cleaning spread across the week, one or two machines per window, rather than a single marathon session. Planning it as a standing weekly slot per machine is what makes it stick.

The wash location matters as well. Cleaning on a lined area near the working face puts the wash water and the loosened waste back into the landfill's containment, which is often the simplest handling. Cleaning at the maintenance shop keeps the mechanics out of the weather but means the machine tracks waste across the site, and the wash water there needs recovery.

PPE and Crew Protection

The cleaning crew is working in an aerosol of leachate, organic matter and whatever pathogens the waste carries. Minimum protection is a full-face shield or goggles with a respirator, chemical-resistant gloves, waterproof bib overalls and boots, and hearing protection. Hot water and high pressure turn the surface film on the machine into a spray that reaches the crew's face and clothing, and the eyes and nose are the exposure routes that matter.

Crew hygiene after the wash is part of the protocol: gloves and outer clothing off before touching anything clean, hand washing before eating, and a clean set of clothing for the drive home. Current tetanus vaccination is a reasonable requirement for anyone regularly cleaning waste equipment, and any cut sustained during the wash should be cleaned and covered immediately. The site's own health and safety program usually has the specifics, and the cleaning crew should be briefed on it before the first wash.

The Wash Itself: Bulk Removal, Degreasing and Rinse

The order is dry removal first, then wet. Cut and pull wrapped material from axles, drive shafts and wheel cleaners with a hooked knife and a pry bar, and shovel out the belly pan. Only then start the water. Washing before the bulk is removed pushes the waste deeper into the machine and doubles the water used.

Hot water at 180 to 200 degrees Fahrenheit and 3,000 to 3,500 PSI with an alkaline degreaser is the standard for the wheels, belly, frame and axles. Work from the top of the machine down and from the front to the rear so runoff carries material off rather than back over cleaned areas. Keep the wand at an angle and at a distance from hub seals, hydraulic fittings, breathers, the cab pressurization intake and the electrical harness, since those are the parts leachate has already been working on.

The cab is a separate job. Operators of waste equipment sit in cabs that carry the same contamination on the floor, the seat, the controls and the air filters. Interior cleaning with a disinfectant cleaner, a fresh cab air filter and clean floor mats does more for the operator than anything else on the list.

Disinfection and Odor Control

Disinfection comes after the wash, not instead of it. A disinfectant applied to a dirty surface is neutralized by the organic load and does nothing. Once the machine is washed and rinsed, apply a quaternary ammonium or chlorine-based disinfectant at the label dilution, usually somewhere around 1 to 2 ounces per gallon for quaternary products, and leave it wet for the contact time on the label, typically 5 to 10 minutes. Then rinse the cab surfaces the operator touches.

Odor control is about removing the source rather than covering it. A machine that still smells after the wash has waste somewhere it has not been reached: inside a boxed frame section, under a floor plate, in the cab heater box or in the radiator core. Find it and clean it. Enzymatic odor treatments are worth applying to the cab floor and seat, where organic material has soaked into fabric and foam.

Water Recovery and the Site Permit

Wash water from waste equipment carries leachate, solids, degreaser and disinfectant. At a lined landfill it can usually go to the leachate collection system if the wash is done on a lined area, which is the reason to wash on the site rather than off it. At a transfer station the floor drains usually go to a sanitary sewer under a permit that limits what can be discharged, and the wash water may need pH adjustment and solids screening before it is allowed.

Washing a landfill machine on an unlined area, at the shop or off site puts the wash water into the stormwater system, and Georgia EPD treats that as a discharge of contaminated water. Recovery mats, berms and a vacuum recovery unit, described in our guide to pressure washing water reclamation, are what allow the wash to happen anywhere on the site without risking the permit. A heavy equipment cleaning service that brings its own recovery is the usual answer for sites without a lined wash pad.

Waste Equipment Cleaning Across Metro Atlanta

PBD Pressure Washing cleans compactors, dozers, loaders, excavators and transfer trailers at landfills, transfer stations and material recovery facilities across Metro Atlanta, with hot water, disinfection, full PPE and wash water recovery, scheduled around your tipping hours. Our team has spent ten years on this kind of equipment and does not send anyone onto a waste site unprepared.

If your site's machines are overdue for a proper wash, request a quote or call (404) 933-8559 with the machine list and the hours you can spare them.

LANDFILL EQUIPMENT CLEANING: A HIGH-CONTAMINATION PROTOCOL