Management Practice Options for Runoff GWPAs (Excluding Engineered Rights of Way)
Select one of the following eight options:
(1) Soil disturbance. Within seven days before the pesticide is applied,
the soil to be treated shall be disturbed by using a disc, harrow, rotary tiller, or other
mechanical method. This practice does not apply to bentazon, and does not apply to the area
to be treated that is immediately adjacent to the crop row and that does not exceed 33 percent
of the distance between crop rows or in citrus within the drip line of the tree row; or
(2) Incorporation of the pesticide. Within 48 hours after the day the
pesticide is applied, the pesticide shall be incorporated on at least 90 percent of the area
treated, using a disc, harrow, rotary tiller, or other mechanical method, or by sprinkler or
low flow irrigation, including chemigation if allowed by the label, using a minimum of � inch of
irrigation water and a maximum of either one inch or the maximum amount of irrigation water
specified on the label, at application rates that do not cause surface water runoff from the
treated property or to wells on the treated property. This subsection does not apply to bentazon,
and does not apply to the area treated with other pesticides listed in section 6800(a) that is
immediately adjacent to the crop row and that does not exceed 33 percent of the distance between
crop rows (illustration) or in citrus within the drip line of the tree row; or
(3) Band treatment. The pesticide shall be applied as a band treatment
immediately adjacent to the crop row so that not more than 33 percent of the distance between
rows is treated or in citrus within the drip line of the tree row; or
(4) Timing of application. The pesticide shall be applied between April 1 and
July 31; or
(5) Retention of runoff on field. For six months following the application,
the field shall be designed, by berms, levees, or non-draining circulation systems, to retain
all irrigation runoff and all precipitation on, and drainage through, the field. The retention
area on the field shall not have a percolation rate of more than 0.2 inches per hour (5 inches
per 24 hours) unless the runoff water in the retention area is completely recycled every 24 hours onto the treated site, neighboring land under the control of the permittee, or neighboring land with the consent of the operator of the neighboring land; or
(6) Retention of runoff in a holding area off the field. For six months
following the application, the field shall be designed so that all runoff is channeled to a
separate holding area under the control of the property operator that is designed to retain
all irrigation runoff and all precipitation on, and drainage through, the treated field and all
other areas draining into that holding area. The holding area shall not have a percolation
rate of more than 0.2 inches per hour (5 inches per 24 hours); or
(7) Runoff onto a fallow field. For six months following the application, runoff shall
be managed so that it runs off onto an adjacent fallow field at least 300 feet long that is not
irrigated for six months after application, with full consideration of any plant back
restrictions; or
(8) An alternative management practice or pesticide approved by the Director as follows
(check with the County Agricultural Commissioner to see if either of these apply):
(a) Upon written request, the Director may evaluate
and approve use of alternative mitigation measures that are based on scientific data demonstrating their
effectiveness in reducing movement of pesticides to ground water; or
(b) Upon written request, the Director may
make a determination to allow the interim use of a pesticide containing a chemical listed in section
6800(a) within a runoff ground water protection area, for a period not to exceed three years. The
Director's determination shall be based on evidence that the available mitigation measures are not
feasible for a specific crop or site, and that there are no feasible alternatives for the specific
crop or site. The formal request shall include a study protocol(s) that is acceptable to the Director
to develop feasible alternatives or alternate mitigation measures.
Return to:
Identifying Ground Water Protection Areas
Section 6800(a) Pesticides
Definition of Engineered Rights of Way
Management Practices For Engineered Rights of Way
Management Practices For Leaching GWPAs - Excluding Engineered Rights of Way
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