(1) The ground water monitoring plan must include a discussion of the
anticipated ground water monitoring system and schedule of sampling for closed
portions of the facility.
(2) If a facility specified in 75-10-207(1) , MCA,
undergoes closure prior to January 1, 1993, the department will require a
minimum of 6 semi-annual sampling episodes for Table 1 [ARM 17.50.708]
parameters prior to approving final closure. These sampling events must occur
after the last date the facility received waste. If no exceedence of preventative action limits or enforcement
standards occurs for any Table 1 [ARM 17.50.708] constituent, then ground water
monitoring at the closed landfill may be discontinued contingent upon written
approval obtained from the department.
Depending on the site-specific hydrogeology study, the department
reserves the right to increase or decrease the number of ground water sampling
events required during closure approval.