South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-58.11 - Control of Lead and Copper › Section 61-58.11.D - Description of Corrosion Control Treatment Requirements

Current through Register Vol. 48, No. 6, June 28, 2024
This section sets forth the requirements applicable to systems
				and states in the designation of optimal corrosion control treatment (OCCT) for
				a system that is optimizing or re-optimizing corrosion control treatment. Each
				system must complete the corrosion control treatment requirements in this
				section as applicable to such system under R.61-58.11.C.
(1) System Recommendation Regarding Corrosion
			 Control Treatment for Systems that do not Contain Lead Service Lines and
			 Systems with Lead Service Lines that do not Exceed the Lead Action Level.
(a) Any system under this paragraph (1)
			 without corrosion control treatment that is required to recommend a treatment
			 option in accordance with R.61-58.11.C(5)
			 must, based on the results of lead and copper tap sampling and water quality
			 parameter monitoring, recommend designation of one or more of the corrosion
			 control treatments listed in paragraph (3)(a)(i) of this section. Small
			 community water systems and non-transient, non-community water systems that
			 exceed the copper action level must comply with this paragraph (1)(a). The
			 Department may require the system to conduct additional water quality parameter
			 monitoring to assist the Department in reviewing the system's
			 recommendation.
(b) Any small
			 community water system or non-transient, non-community water system in this
			 paragraph (1) without corrosion control treatment that chooses to pursue a
			 small water system compliance flexibility option and is required to recommend
			 an option in accordance with R.61-58.11.C(6)
			 must, based on the results of lead tap sampling and water quality parameter
			 monitoring, recommend designation of one of the options listed in
			 R.61-58.11.O. Systems with no lead
			 service lines that exceed the lead action level and select corrosion control
			 under R.61-58.11.O(1)(b)
			 must recommend designation of one or more of the corrosion control treatments
			 listed in paragraph (3)(a) of this section as the optimal corrosion control
			 treatment for that system.
(c) Any
			 system under this paragraph (1) that exceeds the lead action level and selects
			 corrosion control under R.61-58.11.O(1)(b)
			 must recommend designation of one or more of the corrosion control treatments
			 listed in paragraph (3)(a)(i) of this section as the optimal corrosion control
			 treatment for that system. A corrosion control study under paragraph (3) of
			 this section is not required for medium and small systems that exceed the lead
			 trigger level but do not exceed the lead and copper action levels, unless
			 required by the Department.
(d) Any
			 small community water system or non-transient, non-community water system with
			 corrosion control treatment that exceeds the lead action level and selects
			 corrosion control under R.61-58.11.O(1)(b)
			 must recommend designation of one or more of the corrosion control treatments
			 listed in paragraph (3)(b) of this section as the optimal corrosion control
			 treatment for that system.
(e) The
			 Department may waive the requirement for a system to recommend OCCT if the
			 Department requires the system, in writing, to complete a corrosion control
			 study within three (3) months after the end of the tap sampling period during
			 which the exceedance occurred. Such systems shall proceed directly to paragraph
			 (3) of this section and complete a corrosion control study.