4.11.909 DURATION OF MONITORING
(1) Monitoring required under a compliance or emergency order shall consist of
sampling and chemical analyses conducted using department approved procedures
(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.