(a)

1. (1) Structures which are even with, or above the sill line, must be drilled and treated at intervals specified by label directions at the juncture of the structure and foundation or wall.
2. (2) If the label directions are not specific, the intervals at which the operator drills to achieve adequate barriers shall be stated on the graph.
3. (3) In such cases, if the maximum intervals are not stated on the graph, the operator will be required to drill and treat the structures at a maximum of eighteen-inch intervals.
4. (4) If the structure is long-rodded, the route must be shown on the diagram of the building.

(b) Structures below the sill line.

1. (1) Veneer construction must be treated with approved chemicals according to the label directions.

2. (2)

   1. (A) Frame construction, in which the structure is within three inches (3”) of the wood, must be treated with approved chemicals according to the label directions.
   2. (B) If the structure is more than three inches (3”) below the wood, no treatment is required unless an infestation is associated with the structure or otherwise specified by the label directions.