Michigan Administrative Code › Department - Environmental Quality › Drinking Water And Municipal Assistance Division › Supplying Water to the Public › Part 6 - STATE DRINKING WATER STANDARDS AND ANALYTICAL › Section R. 325.10612a - Groundwater supply rules; treatment technique requirements for groundwater supplies

Current through Vol. 24-12, July 15, 2024
Rule 612a.
(1) All
				  of the following apply to groundwater supplies that are subject to R 325.10612
				  with significant deficiencies or source water fecal contamination:
(a) The treatment technique requirements of
				  this rule shall be met by groundwater supplies when a significant deficiency is
				  identified or when a groundwater source sample collected under R 325.10739 (1)
				  (c) is fecal indicator-positive.
(b) If directed by the department, a
				  groundwater supply with a groundwater source sample collected under sampling
				  requirements of R 325.10739 (1) (b), consecutive and wholesale supply
				  requirements of R 325.10739 (1) (d), or assessment source water requirements of
				  R 325.10739 (2) that is fecal indicator-positive shall comply with the
				  treatment technique requirements of this rule.
(c) When a significant deficiency is
				  identified at a Subpart H supply that uses both groundwater and surface water
				  or groundwater under the direct influence of surface water, the Subpart H
				  supply shall comply with this subrule except where the department determines
				  that the significant deficiency is in a portion of the distribution system that
				  is served solely by surface water or groundwater under the direct influence of
				  surface water.
(d) Unless the
				  department directs the groundwater supply to implement a specific corrective
				  action, the groundwater supply shall consult with the department regarding the
				  appropriate corrective action within 30 days of receiving written notice from
				  the department of a significant deficiency, written notice from a laboratory
				  that a groundwater source sample collected under R 325.10739 (1) (c) was found
				  to be fecal indicator-positive, or direction from the department that a fecal
				  indicator-positive collected under sampling requirements of R 325.10739 (1)
				  (b), consecutive and wholesale supply requirements of R 325.10739 (1) (d), or
				  assessment source water requirements of R 325.10739 (2) requires corrective
				  action. For purposes of this rule, R 325.10612, and R 325.10739 to R
				  325.10739b, significant deficiencies include, but are not limited to, defects
				  in design, operation, or maintenance, or a failure or malfunction of the
				  sources, treatment, storage, or distribution system that the department
				  determines to be causing, or have potential for causing, the introduction of
				  contamination into the water delivered to consumers.
(e) Within 120 days, or earlier if directed
				  by the department, of receiving written notification from the department of a
				  significant deficiency, written notice from a laboratory that a groundwater
				  source sample collected under R 325.10739 (1) (c) was found to be fecal
				  indicator-positive, or direction from the department that a fecal
				  indicator-positive sample collected under sampling requirements of R 325.10739
				  (1) (b), consecutive and wholesale supply requirements of R 325.10739 (1) (d),
				  or assessment source water requirements of R 325.10739 (2) requires corrective
				  action, the groundwater supply shall comply with either of the following:
(i) Have completed corrective action under
				  applicable department plan review processes or other department guidance or
				  direction, if any, including department-specified interim measures.
(ii) Be in compliance with a
				  department-approved corrective action plan and schedule subject to both of the
				  following conditions:
(A) Any subsequent
				  modifications to a department-approved corrective action plan and schedule
				  shall also be approved by the department.
(B) If the department specifies interim
				  measures for protection of the public health pending department approval of the
				  corrective action plan and schedule or pending completion of the corrective
				  action plan, the groundwater supply shall comply with these interim measures as
				  well as with any schedule specified by the department.
(f) Groundwater supplies that meet
				  the conditions of subdivision (a) or (b) of this subrule shall implement 1 or
				  more of the following corrective action alternatives:
(i) Correct all significant
				  deficiencies.
(ii) Provide an
				  alternate source of water.
(iii)
				  Eliminate the source of contamination.
(iv) Provide treatment that reliably achieves
				  not less than 4-log treatment of viruses (using inactivation, removal, or a
				  department-approved combination of 4-log virus inactivation and removal) before
				  or at the first customer for the groundwater source.
(g) A community groundwater supply that
				  receives notice from the department of a significant deficiency or notification
				  of a fecal indicator-positive groundwater source sample that is not invalidated
				  by the department under R 325.10739 (3) is subject to R 325.10408c.