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 Washington Administrative Code (Last Updated: November 23, 2016)
 Title 16. Agriculture, Department of (See Titles 24, 60, and 142)
 Chapter 16-231. Use restricted herbicides.

  Section 16-231-340. What are the restrictions on applications due to wind conditions?  

Latest version.
  • (1) Area 1 and 2.
    (a) The use or application of use restricted herbicides shall be prohibited on and after April 16 through October 31 when the mean sustained wind velocity is over ten miles per hour.
    (b) The use or application of use restricted herbicides is prohibited on and after November 1 through April 15 of the following year when the mean sustained wind velocity is over twelve miles per hour: Provided, That application of allowable use restricted herbicides is exempt from these wind restrictions when applying fifty gallons or more per acre.
    (2) Area 3 and 4. The use or application of use restricted herbicides is prohibited when the mean sustained wind velocity is over twelve miles per hour: Provided, That ground applications of use restricted herbicides are allowed when using No. 2RD or 2RA Raindrop nozzles when the mean sustained wind velocity is fifteen miles per hour or less: Provided further, That application of allowable use restricted herbicides is exempt from these wind restrictions when applying fifty gallons or more per acre: And provided further, That applications of use restricted herbicides are allowed in winds up to and including twenty miles per hour when an approved ground apparatus is used. Ground apparatus shall be approved by the department of agriculture. Approval will be based on research data.
    [Statutory Authority: Chapters 17.21, 15.58, and 34.05 RCW. WSR 07-11-041A, § 16-231-340, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 91-06-019 (Order 2073), § 16-231-340, filed 2/26/91, effective 3/29/91; WSR 87-09-015 (Order 1923), § 16-231-340, filed 4/6/87; WSR 80-03-035 (Order 1674), § 16-231-340, filed 2/20/80.]
Chapters 17.21, 15.58, and 34.05 RCW. WSR 07-11-041A, § 16-231-340, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 91-06-019 (Order 2073), § 16-231-340, filed 2/26/91, effective 3/29/91; WSR 87-09-015 (Order 1923), § 16-231-340, filed 4/6/87; WSR 80-03-035 (Order 1674), § 16-231-340, filed 2/20/80.