Louisiana Administrative Code › Title 51 - PUBLIC HEALTH-SANITARY CODE › Part XII - Water Supplies › Chapter 13 - Disinfectants and Disinfection Byproducts Rule › Subchapter B - Disinfection Byproduct (DBP) Precursor Control › Section XII-1309 - Step 2 Bench-Scale (Jar) or Pilot-Scale Testing

Current through Register Vol. 50, No. 6, June 20, 2024
A. Water systems, meeting §1303. A applicability requirements of this Subchapter, which cannot achieve Step 1 TOC
				  removal requirements at any time following 12 months of paired TOC monitoring,
				  shall submit an application to the state health officer for approval of
				  alternative minimum (Step 2) TOC removal requirements. Such application shall
				  be submitted within three months of the failure to achieve the Step 1 TOC
				  removal requirements specified in
				  40
				  CFR 141.135(b)(2). The
				  application shall include the results of bench-scale (jar) or pilot-scale
				  testing conducted in accordance with the applicable provisions of
				  §377 of this Part, specifically,
				  40
				  CFR 141.135(b)(4). The
				  system shall conduct bench-scale (jar) or pilot-scale testing at a frequency of
				  no less than once per calendar quarter for at least one year (beginning from
				  the time of failure to achieve Step 1 TOC removal requirements) so that
				  seasonal changes in raw water quality may be assessed and accounted
				  for.
B. For a system which
				  voluntarily completed 12 months of TOC monitoring prior to the applicable
				  federal compliance date of the rule for the particular system (i.e., performed
				  pre-compliance paired TOC/alkalinity monitoring to determine whether Step 1 TOC
				  removals could be met before the compliance date of the rule) and then
				  determines in the first 12 months after the federal compliance date that it is
				  not able to meet the Step 1 TOC removal requirements and therefore must apply
				  for alternative minimum TOC removal (Step 2) requirements, the state health
				  officer may make the Step 2 requirements retroactive for the purpose of
				  determining compliance.
1. Pursuant to the
				  requirements of Subsection A of this Section, at least one Step 2 TOC
				  bench-scale (jar) or pilot-scale test is required to be performed per calendar
				  quarter. When the state health officer agrees to make the Step 2 TOC removal
				  requirements retroactive in accord with the requirements of Subsection B of
				  this Section, the Step 2 TOC removal requirements shall be applied
				  retroactively by the equivalent calendar quarter. [ For example, Step 2 TOC
				  removal requirements determined during the first calendar quarter of 2005 (for
				  applicable surface water systems serving less than 10,000 persons) shall
				  retroactively be applied as the TOC requirement to the first calendar quarter
				  of 2004; Step 2 TOC removal requirements determined during the second calendar
				  quarter of 2005 shall retroactively be applied as the TOC requirement to the
				  second calendar quarter of 2004; Step 2 TOC removal requirements determined
				  during the third calendar quarter of 2005 shall retroactively be applied as the
				  TOC requirement to the third calendar quarter of 2004; and, Step 2 TOC removal
				  requirements determined during the fourth calendar quarter of 2005 shall
				  retroactively be applied as the TOC requirement to the fourth calendar quarter
				  of 2004.]