South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-58.13 - Disinfectant Residuals, Disinfection Byproducts, and Disinfection Byproduct Precursors (Stage 1 Disinfectants and Disinfection Byproducts Rule)
Section 61-58.13.E - Reporting and Recordkeeping Requirements
Universal Citation: SC Code Regs 61-58.13.E
Current through Register Vol. 48, No. 9, September 27, 2024
(1) Systems required to sample quarterly or more frequently must report to the Department within 10 days after the end of each quarter in which samples were collected, notwithstanding the provisions of R.61-58.6. Systems required to sample less frequently than quarterly must report to the Department within 10 days after the end of each monitoring period in which samples were collected.
(2) Disinfection Byproducts - Systems must report the following information:
(a) Systems monitoring for TTHM and HAA5
under the requirements of R.61-58.13.C(2)
on a quarterly or more frequent basis must report:
(i) The number of samples taken during the
last quarter.
(ii) The location,
date, and result of each sample taken during the last quarter.
(iii) The arithmetic average of all samples
taken in the last quarter.
(iv) The
annual arithmetic average of the quarterly arithmetic averages of this section
for the last four (4) quarters.
(v)
Whether, based on Section D(2)(a) above, the MCL was violated.
(b) Systems monitoring for TTHMs
and HAA5 under the requirements of R.61-58.13.C(2)
less frequently than quarterly (but at least annually) must report
(i) The number of samples taken during the
last year.
(ii) The location, date,
and result of each sample taken during the last monitoring period.
(iii) The arithmetic average of all samples
taken over the last year.
(iv)
Whether, based on Section D(2)(a) above, the MCL was violated.
(c) Systems monitoring for TTHMs
and HAA5 under the requirements of R.61-58.13.C(2)
less frequently than annually must report:
(i) The location, date, and result of each
sample taken.
(ii) Whether, based
on Section D(2)(a) above, the MCL was violated.
(d) Systems monitoring for chlorite under the
requirements of R.61-58.13.C(2)
must report:
(i) The number of entry point
samples taken each month for the last three (3) months.
(ii) The location, date, and result of each
sample (both entry point and distribution system) taken during the last
quarter.
(iii) For each month in
the reporting period, the arithmetic average of all samples taken in each three
(3) samples set taken in the distribution system.
(iv) Whether, based on Section D(2)(c) above,
the MCL was violated, and in which month, and how many times it was violated
each month.
(e) System
monitoring for bromate under the requirements of R.61-58.13.C(2)
must report:
(i) The number of samples taken
during the last quarter.
(ii) The
location, date, and result of each sample taken during the last
quarter.
(iii) The arithmetic
average of the monthly arithmetic averages of all samples taken in the last
year.
(iv) Whether, based on
Section D(2)(b) above, the MCL was violated.
(3) Disinfectants - Systems must report the following information:
(a) Systems monitoring
for chlorine or chloramines under the requirements of R.61-58.13.C(3)
must report:
(i) The number of samples taken
during each month of the last quarter.
(ii) The monthly arithmetic average of all
samples taken in each month for the last twelve (12) months.
(iii) The arithmetic average of all monthly
averages for the last twelve (12) months.
(iv) Whether, based on Section D(3)(a) above,
the MRDL was violated.
(b) Systems monitoring for chlorine dioxide
under the requirements of R.61-58.13.C(3)
must report:
(i) The dates, results, and
locations of samples taken during the last quarter.
(ii) Whether, based on Section D(3)(b) above,
the MRDL was violated.
(iii)
Whether the MRDL was exceeded in any two (2) consecutive daily samples and
whether the resulting violation was acute or Non-acute.
(4) Disinfection byproduct precursors and enhanced coagulation or enhanced softening - Systems must report the following information:
(a) System
monitoring monthly or quarterly for TOC under the requirements of
R.61-58.13.C(4)
and required to meet the enhanced coagulation or enhanced softening
requirements in R.61-58.13.F(2)(b)
or (c) must report:
(i) The number of paired (source water and
treated water) samples taken during the last quarter.
(ii) The location, date, and results of each
paired sample and associated alkalinity taken during the last
quarter.
(iii) For each month in
the reporting period that paired samples were taken, the arithmetic average of
the percent reduction of TOC for each paired sample and the required TOC
percent removal.
(iv) Calculations
for determining compliance with the TOC percent removal requirements, as
provided in R.61-58.13.F(3)(a).
(v) Whether the system is in compliance with
the enhanced coagulation or enhanced softening percent removal requirements in
R.61-58.13.F(2)
for the last four (4) quarters.
(b) System monitoring monthly or quarterly
for TOC under the requirements of R.61-58.13(F)(1)(a) or
(b)(C)(61-58.13(C)(4)) and meeting one or
more of the alternative compliance criteria in R.61-58.13(C)(4)(F)(1)(a) or
(b) must report:
(i) The alternative compliance criterion that
the system is using.
(ii) The
number of paired samples taken during the last quarter.
(iii) The location, date, and result of each
paired sample and associated alkalinity taken during the last
quarter.
(iv) The running annual
arithmetic average based on monthly averages (or quarterly samples) of source
water TOC for systems meeting a criterion in R.61-58.13(F)(1)(a)(i) or (iii)(F)(1)(a)(i) or
(iii) or of treated water TOC for systems
meeting the criterion in R.61-58.13(F)(1)(a)(ii)(F)(1)(a)(ii).
(v) The running annual arithmetic average
based on monthly averages (or quarterly samples) of source water SUVA for
systems meeting the criterion in R.61-58.13.F(1)(a)(v)
or of treated water SUVA for systems meeting the criterion in R.61-58.13.F(1)(a)(vi).
(vi) The running annual average of source
water alkalinity for systems meeting the criterion in R.61-58.13.F(1)(a)(iii)
and of treated water alkalinity for systems meeting the criterion in
R.61-58.13.F(1)(b)(i).
(vii) The running annual average for both
TTHM and HAA5 for systems meeting the criterion in R.61-58.13.F(1)(a)(iii)
or (iv).
(viii) The running annual
average of the amount of magnesium hardness removal (as
CaCO3, in mg/L) for systems meeting the criterion in
R.61-58.13.F(1)(b)(ii).
(ix) Whether the system is in compliance with
the particular alternative compliance criterion in R.61-58.13(F)(1)(a) or (b)(F)(1)(a) or
(b).
(5) The Department may choose to perform calculations and determine whether the treatment technique was met, in lieu of having the system report that information.
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