Ohio Administrative Code › Title 3745 - Ohio Environmental Protection Agency › Chapter 3745-81 - Primary Drinking Water Rules › Section 3745-81-64 - General requirements of the Long Term 2 Enhanced Surface Water Treatment (LT2) Rule

Current through all regulations passed and filed through July 1, 2024
(A)
								 The requirements of rules 3745-81-64 to
			 3745-81-69
			 of the Administrative Code are derived from national primary drinking water
			 regulations. This rule establishes or extends treatment technique requirements
			 in lieu of maximum contaminant levels for Cryptosporidium and are in addition
			 to requirements for filtration and disinfection in rules
			 3745-81-71
			 to
			 3745-81-75
			 of the Administrative Code. These rule requirements apply to each public water
			 system using a surface water source, in whole or in part. Wholesale systems
			 must comply with the requirements of these rules based on the population of the
			 largest system in the combined distribution system.
Consecutive systems are not exempt from
				the requirements of the LT2 rule. However, consecutive systems may receive
				water that a wholesale system has monitored and treated, if required, to comply
				with the LT2 rule. In this case, the consecutive system is not required to
				conduct additional monitoring or install additional treatment on that water
				under the requirements of the LT2 rule.
(B)
								 Systems subject
			 to this rule shall comply with the following requirements:
(1)
									 Systems shall
			 conduct an initial and a second round of source water monitoring for each plant
			 that treats a surface water source, in whole or in part. This monitoring may
			 include sampling for Cryptosporidium, E. coli, and turbidity as described in
			 rule
			 3745-81-65
			 and paragraph (A) of rule
			 3745-81-66
			 of the Administrative Code, to determine what level, if any, of additional
			 Cryptosporidium treatment that shall be provided.
(2)
									 Systems that
			 plan to make a significant change to their disinfection practice shall develop
			 disinfection profiles and calculate disinfection benchmarks, as described in
			 paragraph (E) of rule
			 3745-81-72
			 of the Administrative Code.
(3)
									 Systems shall
			 determine the appropriate Cryptosporidium treatment bin classification as
			 described in paragraphs (A) to (D) of rule
			 3745-81-67
			 of theAdministrative Code and provide additional treatment for Cryptosporidium,
			 if required, as described in paragraph (E) of rule
			 3745-81-67
			 of theAdministrative Code. Systems shall implement Cryptosporidium treatment in
			 accordance with the schedule in paragraph (F) of rule
			 3745-81-67
			 of the Administrative Code.
(4)
									 Systems required
			 to provide additional treatment for Cryptosporidium shall implement microbial
			 toolbox options that are designed and operated as described in rule
			 3745-81-68
			 of the Administrative Code.
(5)
									 Systems shall
			 comply with the applicable recordkeeping and reporting requirements described
			 in rule
			 3745-81-69
			 of the Administrative Code.
(6)
									 Systems shall
			 address significant deficiencies identified in sanitary surveys performed by
			 the Ohio environmental protection agency as required by rule
			 3745-81-60
			 of the Administrative Code.