South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-58.10 - Filtration and Disinfection › Section 61-58.10.K - Enhanced Treatment for Cryptosporidium (Long Term 2 Surface Water Treatment Rule)

Current through Register Vol. 48, No. 6, June 28, 2024
(1) General
			 Requirements
(a) The requirements of
			 R.61-58.10.K are National Primary Drinking Water Regulations that establish or
			 extend treatment technique requirements in lieu of maximum contaminant levels
			 for Cryptosporidium. These requirements are in addition to requirements for
			 filtration and disinfection in R.61-58.10 A through I.
(b) Applicability.
The requirements of R.61-58.10.K apply to all subpart H
				systems.
(i) Wholesale systems, as
			 defined in R.61-58.B,
			 must comply with the requirements of R.61-58.10.K based on the population of
			 the largest system in the combined distribution system.
(ii) The requirements of R.61-58.10.K for
			 filtered systems apply to systems required by State Primary Drinking Water
			 Regulations to provide filtration treatment, whether or not the system is
			 currently operating a filtration system.
(iii) The requirements of R.61-58.10.K for
			 unfiltered systems apply only to unfiltered systems that timely met and
			 continue to meet the filtration avoidance criteria in R.61-58.10.A through
			 I, as applicable.
(c)
			 Requirements.
Systems subject to R.61-58.10.K must comply with the following
				requirements:
(i) Systems must conduct
			 an initial and a second round of source water monitoring for each plant that
			 treats a surface water or ground water under direct influence (GWUDI) source.
			 This monitoring may include sampling for Cryptosporidium, E. coli, and
			 turbidity as described in R.61-58.10.K(2) through R.61-58.10.K(7), to determine
			 what level, if any, of additional Cryptosporidium treatment they must
			 provide.
(ii) Systems that plan to
			 make a significant change to their disinfection practice must develop
			 disinfection profiles and calculate disinfection benchmarks, as described in
			 R.61-58.10.K(9) and (10).
(iii)
			 Filtered systems must determine their Cryptosporidium treatment bin
			 classification as described in R.61-58.10.K(11) and provide additional
			 treatment for Cryptosporidium, if required, as described in R.61-58.10.K(12).
			 All unfiltered systems must provide treatment for Cryptosporidium as described
			 in R.61-58.10.K(13). Filtered and unfiltered systems must implement
			 Cryptosporidium treatment according to the schedule in
			 R.61-58.10.K(14).
(iv) Systems with
			 uncovered finished water storage facilities must comply with the requirements
			 to cover the storage facility or treat the discharge from the storage facility
			 as described in R.61-58.10.K(15).
(v) Systems required to provide additional
			 treatment for Cryptosporidium must implement microbial toolbox options that are
			 designed and operated as described in R.61-58.10.K(16) through
			 R.61-58.10.K(21).
(vi) Systems must
			 comply with the applicable recordkeeping and reporting requirements described
			 in R.61-58.10.K(22) through R.61-58.10.K(23).
(vii) Systems must address significant
			 deficiencies identified in sanitary surveys performed by EPA as described in
			 R.61-58.10.K(24).