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60 Ways Farmers Can Protect  Surface Water
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58. Rinse And Dispose Of Chemical Containers Safely

Triple Rinsing

Empty pesticide containers are not really empty, for as much as 2 to 4 ounces of the chemical may remain inside an unrinsed container. Therefore, rinse containers immediately after emptying them. The two most common systems are the triple-rinse procedure and the jet-spray system.

To triple-rinse a container, empty the container into the spray tank and let it drain for 30 seconds. If the container is designed to hold less than 5 gallons of pesticide, fill it one-fourth full with clean water. If the container is designed to hold 5 gallons of pesticide or more, fill it one-fifth with clean water.

Triple Rinsing cont. Shake or swirl the container vigorously to rinse all inside surfaces. Empty rinsate into the spray tank and let it drain for 30 seconds. Then repeat the procedure two more times and puncture the bottom so the container cannot be reused.
"pressure rinsing" Speed is the advantage of jet spraying, or "pressure rinsing"—a system in which you puncture the bottom of the container with the pressure rinse nozzle, then rinse for sixty seconds. The rinsate will drain directly into your spray tank.
pesticide containers Do not dump pesticide container rinse water on the ground. Empty all rinsate into your spray tank and apply it to your fields, as long as you do not exceed label rates. If you cannot apply the rinse water without exceeding rates, store it in a rinsate drum for later use as mix water in the spray tank mix.
ways to avoid the disposal dilemma entirely Keep in mind that there are ways to avoid the disposal dilemma entirely. You can use disposable packages, designed to dissolve in the tank. In some areas, you can recycle containers. You can also reuse mini-bulk containers, and some manufacturers will allow you to return empty containers.
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