WAC 16-231-530   What are restrictions due to wind conditions?  (1) Areas 1 and 3.

     (a) On and after April 15 through October 31, the use or application of use restricted herbicides is prohibited when the mean sustained wind velocity is over seven miles per hour.

     (b) On and after November 1 through April 14 the following year, the use or application of use restricted herbicides is prohibited when the mean sustained wind velocity is over twelve miles per hour.

     (2) Area 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 No. 2RA Raindrop nozzles when the mean sustained wind velocity is fifteen miles per hour or less and allowed by the label.

     (3) All areas. Applications of use restricted herbicides are allowed in winds up to and including twenty miles per hour when an approved ground apparatus is used and allowed by the label. 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. 07-11-041A, § 16-231-530, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. 91-06-019 (Order 2073), § 16-231-530, filed 2/26/91, effective 3/29/91; 87-09-015 (Order 1923), § 16-231-530, filed 4/6/87; 80-03-033 (Order 1672), § 16-231-530, filed 2/20/80.]