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(1)  Monitoring required under a compliance or emergency order shall consist of sampling and chemical analyses conducted using department approved procedures and methods:

(a)  Required ground water monitoring shall continue until residues in ground water are within levels established in the compliance or emergency order by the department in consultation with the DHES.

(b)  The department when determining duration of monitoring, shall consider the following factors: classification of the ground water, present and future beneficial uses, the standard, the laboratory detection level and whether or not the impaired or degraded ground water is affecting other persons or aquifers.

(c)  The department may require that ground water monitoring continue for one or more annual hydrologic cycles after analytical results fall within the accepted level.

(2)  The department may require that persons who are served with a compliance or emergency order submit a written plan that describes the procedures for conducting corrective actions. Examples of procedures that may be required include quality assurance procedures, analytical methods, detection limits, sampling and monitoring methods, clean-up and the other provisions of this rule.

History: Sec. 80-15-105, MCA; IMP, Sec. 80-15-403 and 80-15-405, MCA; NEW, 1990 MAR p. 2244, Eff. 12/28/90.

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