(1) The ground water monitoring report must include a maintenance plan for all monitoring wells in the ground water monitoring well network for active and closed portions of the facility.

(2) The facility owner or operator shall inspect all monitoring wells at least twice each year.   Sampling personnel shall inspect all monitoring wells each time the well is sampled or a static water level is measured.   If, for any reason, a monitoring well is destroyed or otherwise fails to function properly, the facility operator shall notify the department in writing within 10 days after discovery. The well shall be repaired if possible. If the well cannot be repaired, it shall be properly abandoned and replaced within 90 days unless otherwise approved in writing by the department.

(3) Maintenance activities shall continue for the active life and post-closure care period of the facility.   If monitoring is to be discontinued at any or all wells, proper abandonment procedures must be followed.