Compilation of Rules and Regulations of the State of Georgia › Department 391 - RULES OF GEORGIA DEPARTMENT OF NATURAL RESOURCES › Chapter 391-3 - ENVIRONMENTAL PROTECTION › Subject 391-3-5 - RULES FOR SAFE DRINKING WATER › Rule 391-3-5-.52 - Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR)

Current through Rules and Regulations filed through June 27,
				2024
(1)
Purpose.
The purpose of the Long Term 2 Enhanced Surface Water
				Treatment Rule (LT2ESWTR) is to reduce illness linked with the contaminant
Cryptosporidium
and other disease-causing microorganisms in
				drinking water. The rule supplements existing regulations by targeting
				additional
Cryptosporidium
treatment requirements to higher
				risk systems. This rule also contains provisions to reduce risks from uncovered
				finished water reservoirs and to ensure that systems maintain microbial
				protection when they take steps to decrease the formation of disinfection
				byproducts that result from chemical water treatment.
(2)
Applicability.
This
				regulation applies to all public water systems that use surface water or ground
				water under the direct influence (GWUDI) of surface water.
(3)
Enhanced Treatment for
Cryptosporidium
.
(a)
				General requirements. The requirements of 40 CFR Part 141 Subpart W are
				national primary drinking water regulations. The regulations in this subpart
				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 Subparts H, P,
				and T of 40 CFR Part 141.
(b)
				Applicability. The requirements of 40 CFR Part 141 SubpartW apply to all public
				water systems supplied by a surface water source and public water systems
				supplied by a ground water source under the direct influence of surface water.
1. Wholesale systems, as defined in
				40 CFR §
												141.2, must comply with the requirements of
				40 CFR Part 141 Subpart W based on the population of the largest system in the
				combined distribution system.
2.
				The requirements of 40 CFR Part 141 Subpart W for filtered systems apply to
				systems required by National Primary Drinking Water Regulations to provide
				filtration treatment, whether or not the system is currently operating a
				filtration system.
3. The
				requirements of 40 CFR Part 141 Subpart W for unfiltered systems apply only to
				unfiltered systems that timely met and continue to meet the filtration
				avoidance criteria in Subparts H, P, and T of 40 CFR Part 141, as
				applicable.
(c)
				Requirements. Systems subject to 40 CFR Part 141 Subpart W must comply with the
				following requirements:
1. Systems must
				conduct an initial and a second round of source water monitoring for each plant
				that treats a surface water or GWUDI source. This monitoring may include
				sampling for
Cryptosporidium, E. coli,
and turbidity as
				described in 40 CFR §
												141.701 through
				141.706, to determine what level,
				if any, of additional
Cryptosporidium
treatment they must
				provide.
2. Systems that plan to
				make a significant change to their disinfection practice must develop
				disinfection profiles and calculate disinfection benchmarks, as described in
				40 CFR §§
												141.708 through
				141.709.
3. Filtered systems must determine their
Cryptosporidium
treatment bin classification as described in
				40 CFR §
												141.710 and provide additional treatment for
Cryptosporidium,
if required, as described in
				40 CFR §
												141.711. All unfiltered systems must provide
				treatment for
Cryptosporidium
as described in
				40 CFR §
												141.712. Filtered and unfiltered systems must
				implement
Cryptosporidium
treatment according to the schedule
				in 40 CFR §
												141.713.
4. Systems with uncovered finished water
				storage facilities must comply with the requirements to cover the facility or
				treat the discharge from the facility as described in
				40 CFR §
												141.714.
5. Systems required to provide additional
				treatment for
Cryptosporidium
must implement microbial toolbox
				options that are designed and operated as described in
				40 CFR §
												141.715 through
				141.720.
6. Systems must comply with the applicable
				recordkeeping and reporting requirements described in
				40 CFR §
												141.721 through
				141.722.
7. Systems must address significant
				deficiencies identified in sanitary surveys performed by EPA or Division as
				described in 40 CFR §
												141.723.