WAC 16-231-425   What are the use restrictions due to wind conditions for Columbia County?  The use or application of use restricted herbicides is prohibited in Area 2 and 4 when the mean sustained wind velocity is over twelve miles per hour throughout the year: Provided, That such application is prohibited in Area 2 on and after May 1 through October 31 when the mean sustained wind velocity is over seven miles per hour: 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 and allowed by the label. Ground apparatus shall be approved by the department of agriculture. Approval shall be based on research data.



[Statutory Authority: Chapters 17.21, 15.58, and 34.05 RCW. 07-11-041A, § 16-231-425, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. 91-06-019 (Order 2073), § 16-231-425, filed 2/26/91, effective 3/29/91; 87-09-015 (Order 1923), § 16-231-425, filed 4/6/87; 80-03-034 (Order 1673), § 16-231-425, filed 2/20/80.]