Section 02.03.01.410 - REPEALING SPECIFIC PESTICIDE AREAS01.Repealing an Area of Pesticide Concern. The Director may repeal or reduce the size of an area of pesticide concern in response to pesticide contamination in ground water if all the conditions in Subsection 410.01 are met: a. Tests on at least three (3) consecutive ground water samples, drawn from each well site in the area of pesticide concern at which the concentration of a pesticide and its metabolites previously were found at twenty percent (20%) to fifty percent (50%) of the reference point, show that the concentration at the well sites has fallen to and remains less than twenty percent (20%) of the reference point. The three (3) consecutive samples shall be collected at each well site at intervals of at least six (6) months, with the first sample being collected at least six (6) months after the effective date of the area of pesticide concern designation. A monitoring well approved by the Director may be substituted for any well site which is no longer available for testing.b. Tests conducted at other well sites in the area of pesticide concern during the same retesting period, if any, reveal no other concentrations of the pesticide or its metabolites that exceed twenty percent (20%) of the reference point; andc. The Director determines, based on credible scientific evidence, that use of a pesticide product in the area of pesticide concern is not likely to cause a renewed detection between twenty percent (20%) to fifty percent (50%) of the reference point.02.Repealing an Area of Pesticide Restriction. The Director may repeal or reduce the size of an area of pesticide restriction in response to ground water pesticide contamination if all the conditions in Subsection 410.02 are met: a. Tests on at least three (3) consecutive ground water samples, drawn from each well site in the area of pesticide restriction at which the concentration of a pesticide and its metabolites previously were found at fifty percent (50%) to less than one hundred percent (100%) of the reference point, show that the concentration at the well sites has fallen to and remains less than fifty percent (50%) of the reference point. The three (3) consecutive samples shall be collected at each well site at intervals of at least six (6) months, with the first sample being collected at least six (6) months after the effective date of the area of the pesticide restriction designation. A monitoring well approved by the Director may be substituted for any well site which is no longer available for testing. As areas of pesticide restriction are repealed, the area automatically becomes an area of pesticide concern;b. Tests conducted at other well sites in the area of pesticide restriction during the same retesting period, if any, reveal no other concentrations of the pesticide or its metabolites that exceed fifty percent (50%) of the reference point; andc. The Director determines, based on credible scientific evidence, that use of a pesticide product in the area of pesticide restriction is not likely to cause a renewed exceedance of fifty percent (50%) of the reference point.03.Repealing an Area of Pesticide Use Prohibition. The Director may repeal or reduce the size of an area of pesticide use prohibition in response to ground water pesticide contamination if all the conditions in Subsection 410.03 are met: a. Tests on at least three (3) consecutive ground water samples, drawn from each well site in the prohibition area at which the concentration of a pesticide and its metabolites previously attained or exceeded the reference point, show that the concentration at that well site has fallen to and remains less than fifty percent (50%) of the reference point. The three (3) consecutive samples shall be collected at each well site at intervals of at least six (6) months, with the first sample being collected at least six (6) months after the effective date of the pesticide use prohibition designation. A monitoring well approved by the Director may be substituted for any well site which is no longer available for testing. As areas of pesticide prohibition are repealed, the area automatically becomes an area of pesticide concern;b. Tests conducted at other well sites in the area of pesticide prohibition during the same retesting period, if any, reveal no other concentrations of the pesticide and its metabolites that exceed fifty percent (50%) of the reference point; andc. The Director determines, based on credible scientific evidence, that renewed use of a pesticide product in the area of pesticide prohibition is not likely to cause a renewed violation of the reference point.Idaho Admin. Code r. 02.03.01.410