In addition to the requirements of the label, each preconstruction application of pesticide for the control of termites shall consist of establishing both horizontal and vertical chemical barriers, as specified in this regulation. (a) Horizontal chemical barriers shall be established in areas intended to be covered, including the soil beneath slab floors and porches, footing trenches for monolithic slabs, and the soil beneath stairs.

1. (b) Vertical chemical barriers shall be established in the soil around the base of foundations, plumbing fixtures, foundation walls, support piers, and voids in masonry, and any other critical areas where structural components extend below grade.

(Authorized by K.S.A. 2-2467a; implementing K.S.A. 2-2471; effective March 26, 1990; amended July 18, 2003.)