Michigan Administrative Code › Department - Environmental Quality › Drinking Water And Municipal Assistance Division › Supplying Water to the Public › Part 7 - SURVEILLANCE, INSPECTION, AND MONITORING › Section R. 325.10719f - Disinfectant residuals, disinfection byproducts, and disinfection byproduct precursors; reporting and recordkeeping

Current through Vol. 24-12, July 15, 2024
Rule 719f.
(1)
				  Supplies required to monitor under
				  R 325.10719e shall report to the
				  department under this rule and
				  R 325.10719n. Supplies required to
				  sample quarterly or more frequently shall report to the department within 10
				  days after the end of each quarter in which samples were collected,
				  notwithstanding the provisions of
				  R
				  325.10734. Supplies required to sample less frequently
				  than quarterly shall report to the department within 10 days after the end of
				  each monitoring period in which samples were collected.
(2) Supplies shall report disinfection
				  byproducts information specified in the following table:
If supply monitors under
								  R 325.10719e(2)
								  for...
Supply shall report...
(a) Chlorite
(i) The number of entry point samples taken each
								  month for the last 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
								  average of all samples taken in each 3-samples set taken in the distribution
								  system.
(iv) Whether, based on
								  R
								  325.10610b(2)(c), the MCL was
								  violated, in which month, and how many times it was violated each month.
(b) Bromate
(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 average of the monthly averages of all
								  samples taken in the last year.
(iv) Whether, based on
								  R
								  325.10610b(2)(b), the MCL was
								  violated.
(3)
				  Supplies shall report disinfectant information specified in the following
				  table:
If supply monitors under
								  R 325.10719e(3)
								  for...
supply shall report...
(a) Chlorine or chloramines
(i) The number of samples taken during each month
								  of the last quarter.
(ii) The monthly average of all samples taken in
								  each month for the last 12 months.
(iii) The average of all monthly averages for the
								  last 12 months.
(iv) Whether, based on
								  R
								  325.10610b(3)(a), the MRDL was
								  violated.
(b) Chlorine dioxide
(i) The dates, results, and locations of samples
								  taken during the last quarter.
(ii) Whether, based on
								  R
								  325.10610(3)(b), the MRDL was
								  violated.
(iii) Whether the MRDL was exceeded in any 2
								  consecutive daily samples and whether the resulting violation was a tier 1 or
								  tier 2 violation.
(4) Supplies shall report disinfection
				  byproduct precursors and enhanced coagulation or enhanced softening information
				  specified in the following table:
If supply monitors monthly or quarterly for TOC
								  under
								  R
								  325.10719e(4)...
Supply shall report...
(a) And is required to meet the enhanced
								  coagulation or enhanced softening requirements in
								  R 325.10610c(2)(b) or
								  (c)
(i) The number of paired samples taken during the
								  last quarter.
(ii) The location, date, and result 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 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
								  325.10610c(3)(a).
(v) Whether the system is in compliance with the
								  enhanced coagulation or enhanced softening percent removal requirements in
								  R 325.10610c(2)
								  for the last 4 quarters.
(b) And meets 1 or more of the alternative
								  compliance criteria in
								  R 325.10610c(1)(b) or
								  (c)
(i) The number of paired samples taken during the
								  last quarter.
(ii) The location, date, and result of each
								  paired sample and associated alkalinity taken during the last quarter.
(iii) The alternative compliance criterion that
								  the system is using.
(iv) The running annual average based on monthly
								  averages, or quarterly samples, of source water TOC for systems meeting a
								  criterion in
								  R 325.10610c(1)(b)(i) or
								  (iii) or of treated water TOC for systems
								  meeting the criterion in
								  R
								  325.10610c(1)(b)(ii).
(v) The running annual average based on monthly
								  averages, or quarterly samples, of source water SUVA for systems meeting the
								  criterion in
								  R
								  325.10610c(1)(b)(v) or of treated
								  water SUVA for systems meeting the criterion in
								  R
								  325.10610c(1)(b)(vi).
(vi) the running annual average of source water
								  alkalinity for systems meeting the criterion in
								  R
								  325.10610c(1)(b)(iii) and of treated
								  water alkalinity for systems meeting the criterion in
								  R
								  325.10610c(1)(c)(i).
(vii) The running annual average for both TTHM
								  and HAA5 for systems meeting the criterion in
								  R
								  325.10610c(1)(b)(iii).
(viii) The running annual average of the amount
								  of magnesium hardness removal, as calcium carbonate, in mg/l, for systems
								  meeting the criterion in
								  R
								  325.10610c(1)(c)(ii).
(ix) Whether the system is in compliance with the
								  particular alternative compliance criterion in
								  R 325.10610c(1)(b) or
								  (c).