(1) Outdoor production pesticide applications.

(a) During any outdoor production pesticide application, the agricultural employer must not allow or direct any worker or other person, other than an appropriately trained and equipped handler involved in the application, to enter or to remain in the treated area or an application exclusion zone (AEZ) that is within the boundaries of the establishment until the application is complete.

(b) A summary of outdoor production application exclusion zones (AEZ) can be found in Table 1 and is defined as follows:

(i) The application exclusion zone is the area that extends one hundred feet horizontally from the application equipment in all directions during application when the pesticide is applied by any of the following methods:

(A) Aerially.

(B) Air blast application.

(C) As a spray using a spray quality (droplet spectrum) of smaller than medium (volume median diameter of less than 294 microns).

(D) As a fumigant, smoke, mist, or fog.

(ii) The application exclusion zone is the area that extends twenty-five feet horizontally from the application equipment in all directions during application when the pesticide is applied not as in (a)(i)(A) through (D) of this subsection and is sprayed from a height of greater than twelve inches from the planting medium using a spray quality (droplet spectrum) of medium or larger (volume median diameter of 294 microns or greater).

(iii) There is no application exclusion zone when the pesticide is applied in a manner other than those covered in (a)(i) and (ii) of this subsection.

(c) During any outdoor production pesticide application, the agricultural employer must not allow or direct any worker or other person, other than an appropriately trained and equipped handler involved in the application, to enter or to remain in the treated area or an application exclusion zone that is within the boundaries of the establishment until the application is complete.

(d) After the application is complete, the area subject to the labeling-specified restricted-entry interval and the postapplication entry restrictions specified in WAC 296-307-10920 is the treated area.

(2) Enclosed space production pesticide applications.

(a) During any enclosed space production pesticide application described in column 1 of Table 2 under (d) of this subsection, the agricultural employer must not allow or direct any worker or other person, other than an appropriately trained and equipped handler involved in the application, to enter or to remain in the application exclusion zone (AEZ) area specified in column 2 of Table 2 under (d) of this subsection during the application and until the time specified in column 3 of Table 2 under (d) of this subsection has expired.

(b) After the time specified in column 3 of Table 2 under (d) of this subsection has expired, the area subject to the labeling-specified restricted-entry interval and the postapplication entry restrictions specified in WAC 296-307-10920 is the area specified in column 4 of Table 2 under (d) of this subsection.

(c) When column 3 of Table 2 under (d) of this subsection specifies that ventilation criteria must be met, ventilation must continue until the air concentration is measured to be equal to or less than the inhalation exposure level required by the labeling. If no inhalation exposure level is listed on the labeling, ventilation must continue until after one of the following conditions is met:

(i) Ten air exchanges are completed.

(ii) Two hours of ventilation using fans or other mechanical ventilating systems.

(iii) Four hours of ventilation using vents, windows, or other passive ventilation.

(iv) Eleven hours with no ventilation followed by one hour of mechanical ventilation.

(v) Eleven hours with no ventilation followed by two hours of passive ventilation.

(vi) Twenty-four hours with no ventilation.

(d) The following table applies to (a), (b), and (c) of this subsection.