Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 611 - PRIMARY DRINKING WATER STANDARDS › Subpart S - GROUNDWATER RULE › Section 611.803 - Treatment Technique Requirements for GWS Suppliers

Current through Register Vol. 48, No. 28, July 12, 2024
a) GWS Suppliers with Significant
				Deficiencies or Source Water Fecal Contamination
1) The treatment technique requirements of
				this Section must be met by GWS suppliers when a significant deficiency is
				identified or when a groundwater source sample collected under Section
				611.802(a)(3)
				is fecal indicator-positive.
2) If
				directed by the Agency by a SEP, a GWS supplier with a groundwater source
				sample collected under Section
				611.802(a)(2),
				(a)(4), or (b) that is fecal
				indicator-positive must comply with the treatment technique requirements of
				this Section.
3) When a significant
				deficiency is identified at a Subpart B PWS that uses both groundwater and
				surface water or groundwater under the direct influence of surface water, the
				system must comply with provisions of this subsection (a) except in cases where
				the Agency 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.
4) Unless the Agency, by a SEP, directs the
				GWS supplier to implement a specific corrective action, the GWS supplier must
				consult with the Agency regarding the appropriate corrective action within 30
				days after receiving written notice from the Agency of a significant
				deficiency, written notice from a laboratory that a groundwater source sample
				collected under Section
				611.802(a)(3)
				was found to be fecal indicator-positive, or direction from the Agency that a
				fecal indicator-positive collected under Section
				611.802(a)(2),
				(a)(4), or (b) requires corrective action.
				For the purposes of this Subpart S, significant deficiencies include defects in
				design, operation, or maintenance, or a failure or malfunction of the sources,
				treatment, storage, or distribution system that the Agency determines to be
				causing, or have potential for causing, the introduction of contamination into
				the water delivered to consumers.
5) Within 120 days (or earlier if directed by
				the Agency) after receiving written notification from the Agency of a
				significant deficiency, written notice from a laboratory that a groundwater
				source sample collected under Section
				611.802(a)(3)
				was found to be fecal indicator-positive, or written notice from the Agency
				that a fecal indicator-positive sample collected under Section
				611.802(a)(2),
				(a)(4), or (b) requires corrective action,
				the GWS supplier must do either of the following:
A) It must have completed corrective action
				in accordance with any applicable plan review processes adopted by the Agency
				or with any SEP issued by the Agency, if any, including Agency-specified
				interim measures; or
B) It must be
				in compliance with an Agency-approved corrective action plan and schedule,
				subject to the following conditions:
i) Any
				subsequent modifications to an Agency-approved corrective action plan and
				schedule must also be approved by the Agency; and
ii) If the Agency specifies interim measures
				for protection of the public health pending Agency approval of the corrective
				action plan and schedule or pending completion of the corrective action plan,
				the supplier must comply with those interim measures, as well as with any
				schedule specified by the Agency.
6) Corrective Action Alternatives. A GWS
				supplier that meets the conditions of subsection (a)(1) or (a)(2) must
				implement one or more of the following corrective action alternatives:
A) It must correct all significant
				deficiencies;
B) It must provide an
				alternate source of water;
C) It
				must eliminate the source of contamination; or
D) It must provide treatment that reliably
				achieves at least 4-log treatment of viruses (using inactivation, removal, or
				an Agency-approved combination of 4-log virus inactivation and removal) before
				or at the first customer for the groundwater source.
7) Special Notice to the Public of
				Significant Deficiencies or Source Water Fecal Contamination
A) In addition to the applicable public
				notification requirements of Section
				611.902,
				a community GWS supplier that receives notice from the Agency of a significant
				deficiency or notification of a fecal indicator-positive groundwater source
				sample that is not invalidated by the Agency under Section
				611.802(d)
				must inform the public served by the water system under Section
				611.883(h)(6)
				of the fecal indicator-positive source sample or of any significant deficiency
				that has not been corrected. The supplier must continue to inform the public
				annually until the significant deficiency is corrected or the fecal
				contamination in the groundwater source is determined by the Agency to be
				corrected under subsection (a)(5).
B) In addition to the applicable public
				notification requirements of Section 611.902, a non-community GWS supplier that
				receives notice from the Agency of a significant deficiency must inform the
				public served by the water system in a manner approved by the Agency of any
				significant deficiency that has not been corrected within 12 months after being
				notified by the Agency, or earlier if directed by the Agency. The supplier must
				continue to inform the public annually until the significant deficiency is
				corrected. The information must include the following information:
i) The nature of the significant deficiency
				and the date the significant deficiency was identified by the Agency;
ii) The Agency-approved plan and schedule for
				correction of the significant deficiency, including interim measures, progress
				to date, and any interim measures completed; and
iii) For a supplier with a large proportion
				of non-English speaking consumers, as determined by the Agency, information in
				the appropriate languages regarding the importance of the notice or a telephone
				number or address where consumers may contact the system to obtain a translated
				copy of the notice or assistance in the appropriate language.
C) If directed by the Agency, a
				non-CWS supplier with significant deficiencies that have been corrected must
				inform its customers of the significant deficiencies, how the deficiencies were
				corrected, and the dates of correction under subsection (a)(7)(B).