Chapter 16: Managing Pesticide Waste

Reducing waste in the first place

Because low-cost disposal options are few, the cheapest waste is the waste you never create. The manual is explicit about the priority: the best way to reduce disposal costs is to not generate waste at all, and the second-best is to use any excess pesticide according to the product label — which also reduces the risks to people and the environment. Practical habits from Table 16.1 support this: buy only as much product as you need for a single season, and date your products so you use the older ones first before they can be canceled or go bad.

Two laws: FIFRA and RCRA

A favorite exam point is the split between two federal laws. FIFRA — the Federal Insecticide, Fungicide, and Rodenticide Act — governs the sale, distribution, and use of pesticides. But once a pesticide is disposed of, it is regulated under RCRA — the Resource Conservation and Recovery Act. The clean way to remember it: FIFRA covers the pesticide's working life; RCRA takes over at disposal. (The review question offers the Hazardous Materials Transportation Act as a distractor — that one governs transport, not disposal.)

Hazardous versus non-hazardous

The full legal terminology is complex, but the one thing to know is that certain pesticides or formulations are regulated as hazardous waste, which carries much more stringent disposal rules than non-hazardous waste. To find out whether a specific product is considered hazardous for disposal, check the safety data sheet and talk to your pesticide distributor.

Where the waste can go

For agricultural and commercial users, the ordinary household system is off-limits: you cannot dispose of leftover pesticides — or even empty, rinsed containers — in regular household waste or recycling programs. Instead, many states run pesticide disposal programs specifically for farmers and commercial users; you find out by checking your state's Department of Agriculture pesticide program, and the Pesticide Stewardship Alliance maintains a state pesticide disposal database. Keep in mind that your state environmental agency has jurisdiction over disposal, and that state and local laws can be stricter than the label — never assume the label is the ceiling.

Disposing of containers

Containers are the bulk of the work, so the chapter gives a clear procedure. The first step with any container is to make sure it is empty, and you should wear PPE and follow the label's rinsing instructions while preparing it. A key rule ties disposal to rinsing: only containers that have been triple rinsed (or the equivalent) may be recycled or disposed of in a sanitary landfill, and a container that hasn't been properly rinsed may be considered hazardous waste if its product is listed as hazardous. For getting rid of an empty container, there's a defined order of preference, from most to least preferred: (1) return it to the dealer for reuse or refilling, (2) recycle it, (3) bring it to your state's pesticide disposal program, and (4) dispose of it in an approved landfill. And one hard prohibition: it is illegal to bury or burn any pesticide containers in most states.

Special container types

Different container types get handled differently, and the distinctions are very testable. Jugs that hold liquid pesticide are usually plastic, sometimes metal, and either must be properly rinsed. Bags for dry products can go to a sanitary landfill or be incinerated if local rules allow; you should open both ends to remove any remaining pesticide and prevent reuse, and shake and tap the bag to empty its contents into the application equipment — and if the bag isn't completely empty, you may have to dispose of it as hazardous waste. Aerosol containers have their own rule that's easy to get backwards: relieve as much pressure as possible, but do NOT puncture the container. Fumigant containers are not the same as aerosols and often need special handling — some fumigant labels call for puncturing the empty container while others do not, and some containers can only be returned to the manufacturer — so you always refer to the label.

Other wastes, and the things you must never do

Beyond empty rinsed containers, disposal gets more complicated. Full or partially full containers of liquid or dry pesticide may need to be managed as hazardous waste, and importantly, sanitary landfills generally do not accept liquid wastes of any sort. For products you no longer want, a dealer might take back unopened products, but banned products may not be returnable and must be disposed of properly, and an unidentifiable product should be disposed of as if it were hazardous waste. The best routes for all of these are a dedicated state or local disposal program or a private hazardous waste hauler. Two absolute rules apply here: never mix chemicals together for disposal, even if you think you know what they are, and for an incompatible jar test mixture, dispose of it according to the label — typically by diluting it with a large amount of water and applying it to a labeled site, or through a hazardous waste program — and never pour it down the drain or into the trash. Finally, spilled pesticide and contaminated soil or absorbent material usually must be treated as waste, though landspreading may be an option if the spilled pesticide is labeled for use on that crop or site — check with your state regulatory agency first.

Be responsible

The chapter closes on its central theme: the rules are complex, so the most important thing is simply to be responsible and avoid being held liable for improper disposal that harms people or the environment. When you're unsure, get official guidance from the pesticide label, your state or municipal waste disposal agency, and your state's pesticide regulatory agency.

How to study this chapter

1. Fix the core fact: you, the applicator, are responsible, under federal and state rules.
2. Memorize the FIFRA vs. RCRA split: FIFRA = sale/distribution/use; RCRA = after disposal.
3. Know the container order of preference: dealer → recycle → state program → approved landfill, and that bury/burn is illegal in most states.
4. Tie disposal to rinsing: only triple-rinsed containers may be recycled or landfilled; unrinsed + hazardous product = hazardous waste.
5. Lock in the special-container rules: aerosols → relieve pressure, don't puncture; fumigants → check the label, some puncture/some return to maker; bags → open both ends, shake into equipment.
6. Remember what landfills won't take: liquid wastes; and unidentifiable products → treat as hazardous.
7. Two nevers: never mix chemicals for disposal, and never pour jar-test mixtures down the drain or trash.
8. From Table 16.1, carry the storage direction that repeats across chapters: dry formulations go on shelves ABOVE liquids.