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PDFWAC 16-230-670

Use restricted herbicidesEastern WashingtonAircraft boom length and application requirements.

In all counties restricted by rule the working boom length on fixed wing aircraft shall not exceed 3/4 of the wing span and the working boom length on helicopters shall not exceed 6/7 of the total rotor length or 3/4 of the total rotor length where the rotor length exceeds forty feet.
Aerial applications of use restricted herbicides shall conform to a combination of nozzles, pressure (psi), plates, nozzle orientation, and aircraft speed that produces a spray droplet class that falls within the coarse (or larger) range as defined by the ASABE standards. Upon request by the department the applicator shall provide all data which supports the nozzle configuration is compliant with spray droplet classifications of coarse (or larger).
[Statutory Authority: RCW 15.58.040 and 17.21.030. WSR 19-02-039, § 16-230-670, filed 12/26/18, effective 1/26/19. Statutory Authority: Chapters 17.21, 15.58, and 34.05 RCW. WSR 07-11-041A, § 16-230-670, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 91-06-019 (Order 2073), § 16-230-670, filed 2/26/91, effective 3/29/91; WSR 80-03-041 (Order 1680), § 16-230-670, filed 2/20/80.]
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