I would use a very strong ammonia solution and even a strong detergent.
Fill the tank well above the mark where the residue is. Circulate with the bypass, tank rinse and recirculating/sparge valves open. Manually increase the pump pressure with the controller. Let run for a long time. Close bypass, tank rinse and sparger valves. Spray some of the solution through the booms(open previously closed valves)....let sit overnight(make sure solution is higher than the residue mark). Spray more through the booms the next day. Dump rinsate and make sure valves are open so no rinsate is trapped behind them. If your nozzles have screens, booms have line strainers clean them along with the main filter. Rinse twice with clean water after that(booms too).
DYODD.... Good luck. The ammonia is supposed to help break down or neutralize group two residue. The detergent will probably foam like a bitch...use defoamer.
ps..."Finish" is an ammonia based tank cleaner.
Edit, in some cases it amazing how little pesticide is needed to do its job....so a bit of residue or poorly cleaned tank, even if it didn't sit with product in for four days, could cause damage.
Fill the tank well above the mark where the residue is. Circulate with the bypass, tank rinse and recirculating/sparge valves open. Manually increase the pump pressure with the controller. Let run for a long time. Close bypass, tank rinse and sparger valves. Spray some of the solution through the booms(open previously closed valves)....let sit overnight(make sure solution is higher than the residue mark). Spray more through the booms the next day. Dump rinsate and make sure valves are open so no rinsate is trapped behind them. If your nozzles have screens, booms have line strainers clean them along with the main filter. Rinse twice with clean water after that(booms too).
DYODD.... Good luck. The ammonia is supposed to help break down or neutralize group two residue. The detergent will probably foam like a bitch...use defoamer.
ps..."Finish" is an ammonia based tank cleaner.
Edit, in some cases it amazing how little pesticide is needed to do its job....so a bit of residue or poorly cleaned tank, even if it didn't sit with product in for four days, could cause damage.
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