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De-contamination
Introduction
A complete cleaning and storage procedure consists of six steps:
1. Read Labels
2. Flush
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WARNING: Always use personal safety equipment and clothing, and make sure contaminated equipment
and clothing is stored, cleaned, or disposed of in an appropriate manner (See "Chemical Safety" in section
2 of this manual).
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WARNING: In-field rinsing can never take the place of a thorough decontamination. Always refer to
Chemical suppliers decontamination instructions for recommended decontamination procedures.
In addition to the cleaning information previously described, complete sprayer cleaning includes "De-
contamination" which is essential to reduce risk to other crops sprayed and makes sure the sprayer is safe and
ready for the next spray job. Always remember, if it's not clean, it's not safe!
It is therefore necessary to neutralise any chemical residues left within the sprayer's fluid system, before changing
crops, chemicals or off-season storage. This includes the main tank, flush tank, chemical induction system, all
hoses, valves, spray lines, nozzles and the external surfaces of the sprayer.
De-contamination agents
Some chemicals require particular neutralising agents and stringent decontamination procedures to make sure
particles that may have adhered to sprayer system surfaces are rendered neutral before spraying a new crop or
changing chemicals.
Chemical labels contain important information regarding safety, cleaning, neutralising agents and
decontamination procedures. Read them and take note of recommended de-activating agents and follow their
instructions to the letter.
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WARNING: Local laws may vary from state to state regarding the use and disposal of certain agricultural
chemicals. Contact your local authorities for details. Information can also be obtained from the
Department of Agriculture, the Department of Primary Industries or the Environmental Protection
Authority.
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WARNING: Contamination of one chemical to another can adversely affect chemical properties and
damage or destroy your next crop. The sprayer must be cleaned and decontaminated when changing
chemicals or crops.
Decontamination:
After your sprayer has been rinsed it is time to decontaminate it. Using the recommended decontamination agent
and dose listed on the product label (personal protective equipment is essential). Be sure to decontaminate both
the interior and exterior of the machine, running the de-contaminating solution right through the fluid system and
boom structure and out the nozzles.
As most chemicals used have a tendency to block nozzles and filters, remove and clean in the appropriate
decontamination solution with a soft brush. Check also for sediment on the pressure side of the safety valve.
3. Drain
4. Decontaminate
5 - Operation
5. Inspect
6. Store
5. 9
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