reglab/statecodes huggingface dataset:
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. 325.10704g - Total coliform; routine monitoring; community and noncommunity; serving more than 1,000 people

Current through Vol. 24-12, July 15, 2024
Rule 704g.
(1)
				  General total coliform rules routine monitoring requirements are all of the
				  following:
(a) This rule applies to community
				  and noncommunity water supplies serving more than 1,000 persons.
(b) Following a total coliform-positive
				  sample taken under this rule, supplies shall comply with the repeat monitoring
				  requirements and E. coli analytical requirements in R 325.10704h.
(c) Once all monitoring required by this rule
				  and R 325.10704h for a calendar month has been completed, supplies shall
				  determine whether 1 or more coliform treatment technique triggers in R
				  325.10704i have been exceeded. If a trigger has been exceeded, supplies shall
				  complete assessments under R 325.10704i.
(d) Seasonal supplies shall comply with both
				  of the following:
(i) Beginning April 1,
				  2016, all seasonal supplies shall complete the department-approved start-up
				  procedure, which may include a requirement for startup sampling, and submit a
				  certification to the department, before serving water to the public, that it
				  has completed the department-approved start-up procedures.
(ii) The department may exempt a seasonal
				  supply from some or all of the requirements for seasonal supplies if the entire
				  distribution system remains pressurized during the entire period that the
				  supply is not operating.
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. 325.10704i - Total coliform; treatment technique triggers; assessments

Current through Vol. 24-12, July 15, 2024
Rule 704i.
(1)
				  Supplies shall conduct assessments under subrule (2) of this rule after
				  exceeding treatment technique triggers in this subrule.
(a) Level 1 treatment technique triggers are
				  all of the following:
(i) For supplies taking
				  40 or more samples per month, the supply exceeds 5.0% total coliform-positive
				  samples for the month.
(ii) For
				  supplies taking fewer than 40 samples per month, the supply has 2 or more total
				  coliform-positive samples in the same month.
(iii) The supply fails to take every required
				  repeat sample after a single total coliform-positive sample.
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. 325.10704j - Total coliform; violations

Current through Vol. 24-12, July 15, 2024
Rule 704j.
(1) A
				  supply is in violation of the MCL for E. coli when 1 or more of the following
				  conditions occur:
(a) The supply has an E.
				  coli-positive repeat sample following a total coliform-positive routine
				  sample.
(b) The supply has a total
				  coliform-positive repeat sample following an E. coli-positive routine
				  sample.
(c) The supply fails to
				  take all required repeat samples following an E. coli-positive routine
				  sample.
(d) The supply fails to
				  test for E. coli when a repeat sample tests positive for total
				  coliform.
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. 325.10704k - Total coliform; reporting and recordkeeping

Current through Vol. 24-12, July 15, 2024
Rule 704k.
(1)
				  Reporting requirements for supplies subject to the total coliform rules in R
				  325.10704a are all of the following:
(a)
E. coli reporting requirements are both of the
					 following:
(i) A supply shall notify
				  the department by the end of the day when the supply learns of an E. coli MCL
				  violation, unless the supply learns of the violation after the department
				  office is closed and the department does not have either an after-hours phone
				  line or an alternative notification procedure, in which case the supply shall
				  notify the department before the end of the next business day, and notify the
				  public under
				  R 325.10401a to
				  R 325.10409.
(ii) A supply shall notify the department by
				  the end of the day when the supply is notified of an E. coli-positive routine
				  sample, unless the supply is notified of the result after the department office
				  is closed and the department does not have either an after-hours phone line or
				  an alternative notification procedure, in which case the supply shall notify
				  the department before the end of the next business day.
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. 325.10705 - Collection and analysis of samples for coliform bacteria; community water systems

Current through Vol. 24-12, July 15, 2024
Rule 705.
(1) A
				  supplier of water of a community water system shall collect samples of water to
				  be analyzed for the presence of coliform bacteria at sites which are
				  representative of water throughout the distribution system according to a
				  written sample siting plan that is subject to department review and
				  revision.
(2) The monitoring
				  frequency for total coliforms for a community water system is based on the
				  population served by the system as set forth in table 1 of this rule:
Table 1 Total Coliform Monitoring Frequency for Community
					 Water Supplies
Population Served
Minimum Number of Samples Per Month
25 to 1,000 *
1
1,001 to 2,500
2
2,501 to 3,300
3
3,301 to 4,100
4
4,101 to 4,900
5
4,901 to 5,800
6
5,801 to 6,700
7
6,701 to 7,600
8
7,601 to 8,500
9
8,501 to 12,900
10
12,901 to 17,200
15
17,201 to 21,500
20
21,501 to 25,000
25
25,001 to 33,000
30
33,001 to 41,000
40
41,001 to 50,000
50
50,001 to 59,000
60
59,001 to 70,000
70
70,001 to 83,000
80
83,001 to 96,000
90
96,001 to 130,000
100
130,001 to 220,000
120
220,001 to 320,000
150
320,001 to 450,000
180
450,001 to 600,000
210
600,001 to 780,000
240
780,001 to 970,000
270
970,001 to 1,230,000
300
1,230,001 to 1,520,000
330
1,520,001 to 1,850,000
360
1,850,001 to 2,270,000
390
2,270,001 to 3,020,000
420
3,020,001 to 3,960,000
450
3,960,001 or more
480
* Includes public water supplies which have not less than
					 15 service connections, but which serve fewer than 25 persons.
(3) If a community water system
				  that serves 25 to 1,000 persons does not have a history of total coliform
				  contamination in its current configuration and a sanitary survey conducted in
				  the past 5 years shows that the system is supplied solely by a protected
				  groundwater source and is free of sanitary defects, the department may reduce
				  the monitoring frequency specified in table 1 of this rule, except that the
				  department shall not reduce the monitoring frequency to less than 1 sample per
				  quarter. To be valid, the reduced monitoring frequency shall be approved, in
				  writing, by the department.
(4)
				  Suppliers of water for all community water systems and noncommunity water
				  systems shall collect samples at regular time intervals throughout the
				  monitoring period, except for those groundwater supplies which serve fewer than
				  4,901 persons and which are not influenced by surface water. Groundwater
				  suppliers that serve fewer than 4,901 persons may collect all required samples
				  on a single day if the samples are taken from different sites.
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. 325.10706 - Collection and analysis of samples for coliform bacteria; noncommunity water system

Current through Vol. 24-12, July 15, 2024
Rule 706.
(1) A
				  supplier of a noncommunity water system shall collect samples for total
				  coliform analysis at sites representative of the water throughout the
				  distribution system according to a written sample siting plan that is subject
				  to department review and revision.
(2) A supplier of a noncommunity water system
				  shall monitor as follows:
(a) A supplier of a
				  noncommunity water system serving more than 1,000 people shall monitor at the
				  same frequency as a like-sized community water system as specified in table 1
				  of R 325.10705.
(b) A supplier of a
				  noncommunity water system for which complete treatment is required under R
				  325.10611(1) shall monitor at the same frequency as a like-sized community
				  water system as specified in table 1 of R 325.10705.
(c) A supplier of a system using only
				  groundwater not under the direct influence of surface water and serving fewer
				  than 1,001 people shall monitor each calendar quarter that the system provides
				  water to the public.
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. 325.10707a - Invalidation of total coliform samples

Current through Vol. 24-12, July 15, 2024
Rule 707a.
(1) A
				  total coliform sample result may be invalidated by the department in 1 or more
				  of the following instances:
(a) A laboratory
				  determines that analytical results are invalid due to any of the following
				  situations:
(i) In the absence of gas, any
				  turbid culture in the mtf or p-a techniques.
(ii) Confluent growth.
(iii) Any sample that is inoculated 30 hours
				  or more after it was collected.
(iv) Improper sample analysis caused a total
				  coliform positive result. If a sample is invalidated under this subdivision,
				  the water supply shall collect another sample from the same location as the
				  original sample within 24 hours of being notified until a valid result is
				  obtained. The department may waive the 24-hour time limit on a case-by-case
				  basis.
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. 325.10707b - General notification requirements for total coliform and fecal coliform/Escherichia coli (E. coli)

Current through Vol. 24-12, July 15, 2024
Rule 707b.
(1)
				  Except as noted in this rule, a supplier of a public water system shall report
				  to the department the results of the analyses as required in R
				  325.10734(1).
(2) A supplier that
				  has failed to comply with a coliform monitoring requirement, including the
				  sanitary survey requirement, shall report the monitoring violation to the
				  department within 10 days after the system discovers the violation.
(3) A supplier of a public water system that
				  exceeded the MCL for total coliform under R 325.10602 shall report the
				  violation to the department not later than the end of the next business day
				  after the supplier learns of the violation.
(4) If fecal coliform or E. coli are
				  determined to be present in any routine or repeat sample, the supplier shall
				  notify the department by the end of the day that the supplier is notified of
				  the test result, unless the supplier is notified of the result after the
				  department office is closed, in which case the supplier shall notify the
				  department before the end of the next business day.
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. 325.10708 - Collection of additional samples

Current through Vol. 24-12, July 15, 2024
Rule 708.
(1) A
				  single sample shall not be attributed to more than 1 monitoring
				  period.
(2) If a sample that is
				  needed to meet monitoring requirements is invalidated under these rules, and
				  the public water supply does not learn of the invalidation until after the
				  monitoring period has ended, and the supply collects a valid sample when they
				  learn of the invalidation, then the valid sample may be used to determine
				  compliance with these rules for the monitoring period that has ended.
(3) If the department collects a sample for
				  the purpose of enforcement when a public water supply is delinquent in meeting
				  a monitoring requirement, then the sample collected after the monitoring period
				  has ended may be used to determine compliance with these rules for the
				  monitoring period that has ended.
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. 325.10709 - Special purpose and invalidated samples

Current through Vol. 24-12, July 15, 2024
Rule 709. Special purpose samples, such as those taken
					 following water main placement, replacement or repair, and samples invalidated
					 pursuant to the provisions of R 325.10707a shall not be used to determine
					 compliance with the provisions of R 325.10705 and R
					 325.10706.
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. 325.10710a - Lead and copper in tap water; monitoring requirements

Current through Vol. 24-12, July 15, 2024
Rule 710a.
(1)
				  Sample site location provisions for lead and copper monitoring in tap water of
				  community and nontransient noncommunity water supplies are as follows:
(a) By the applicable date for the
				  commencement of monitoring under subrule (4)(a) of this rule, each water supply
				  shall complete a materials evaluation of its distribution system to identify a
				  pool of targeted sampling sites that is in compliance with the requirements of
				  this rule. The water supply shall also use the results of its distribution
				  system materials inventory required under
				  R 325.11604(c) to
				  update the sampling pool as necessary. All sites from which samples are
				  collected shall be selected from the pool of targeted sampling sites. Sampling
				  sites shall not include faucets that have point of use or point of entry
				  treatment devices designed to remove inorganic contaminants. By January 1,
				  2020, and in a form and manner specified by the department, a supply shall
				  submit to the department a lead and copper tap sampling pool as follows:
(i) The sampling pool shall, at a minimum,
				  identify sufficient sites to ensure the water supply can collect the number of
				  tap samples required for standard monitoring under subrule (3) of this
				  rule.
(ii) The sampling pool shall
				  identify the location of the sites and describe how each site meets selection
				  criteria in this subrule.
(iii) A
				  water supply may update its sampling pool as necessary to ensure the pool
				  contains high risk sites meeting tier criteria. A supply shall submit updates
				  to the department. Updates shall identify any site removed from the sampling
				  pool and why the site was removed. The sampling pool shall identify the
				  location of any site added to the pool and describe how the site meets
				  selection criteria.
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. 325.10710b - Monitoring requirements for water quality parameters

Current through Vol. 24-12, July 15, 2024
Rule 710b.
(1) The
				  requirements of this rule are summarized in table 1 of this rule. The following
				  community and nontransient noncommunity water supplies, which are considered
				  "water supplies" or "supplies" in this rule, shall monitor for water quality
				  parameters in addition to lead and copper under this rule:
(a) Large water supplies.
(b) Small and medium size water supplies that
				  exceed the lead or copper action level or have optimal corrosion control
				  treatment installed.
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. 325.10710c - Monitoring requirements for lead and copper in source water

Current through Vol. 24-12, July 15, 2024
Rule 710c.
(1)
				  Sample location, collection methods, and number of samples required for lead
				  and copper monitoring in source water of community and nontransient
				  noncommunity water supplies are as follows:
(a) A water supply that fails to meet the
				  lead or copper action level based on tap samples collected under R 325.10710a
				  shall collect lead and copper source water samples under the following
				  requirements regarding sample location, number of samples, and collection
				  methods:
(i) Groundwater supplies shall take a
				  minimum of 1 sample at every entry point to the distribution system which is
				  representative of each well after treatment, hereafter called a sampling point.
				  The supply shall take 1 sample at the same sampling point unless conditions
				  make another sampling point more representative of each source or treatment
				  plant.
(ii) Surface water supplies
				  shall take a minimum of 1 sample at every entry point to the distribution
				  system after the application of treatment or in the distribution system at a
				  point which is representative of each source after treatment, hereafter called
				  a sampling point. The supply shall take each sample at the same sampling point
				  unless conditions make another sampling point more representative of each
				  source or treatment plant. For purposes of this paragraph, surface water
				  supplies include water supplies with a combination of surface and ground
				  sources.
(iii) If a supply draws
				  water from more than 1 source and the sources are combined before distribution,
				  the supply shall sample at an entry point to the distribution system during
				  periods of normal operating conditions, that is, when water is representative
				  of all sources being used.
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. 325.10717b - Special monitoring

Current through Vol. 24-12, July 15, 2024
Rule 717b.
(1) All
				  of the following provisions apply to sodium monitoring:
(a) A community water supply shall collect
				  and analyze 1 sample per plant at the entry point to the distribution system to
				  determine sodium concentration levels. A community water supply is also
				  considered "water supply" or "supply" in this rule. Samples shall be collected
				  and analyzed annually for a supply that utilizes surface water sources in whole
				  or in part and at least once every 3 years for a supply that utilizes solely
				  ground water sources. The minimum number of samples required to be taken by the
				  supply shall be based on the number of treatment plants used by the supply,
				  except that multiple wells drawing raw water from a single aquifer may be
				  considered 1 treatment plant for determining the minimum number of
				  samples.
(b) The supply shall
				  report to the department the results of the analyses for sodium as required in
				  R 325.10734 (1). If the department requires more than annual sampling, then the
				  supply shall report the average sodium concentration as required in R 325.10734
				  (1) after taking the last sample used for the annual average.
(c) The supply shall notify the local health
				  department of the sodium levels within 3 months in writing. The supply shall
				  send a copy of the written notice to the state within 10 days of its issuance.
				  The supply is not required to send written notice to the local health
				  department when the department provides the notice instead of the
				  supply.
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. 325.10717d - Collection and analysis of samples for per- and polyfluoroalkyl substances

Current through Vol. 24-12, July 15, 2024
Rule 717d.
(1)
				  Suppliers of community and nontransient noncommunity water supplies shall
				  collect samples and cause analyses to be made under this rule for per- and
				  polyfluoroalkyl substances to determine compliance with the state drinking
				  water standards in R 325.10604g. Each supplier shall monitor at the time
				  designated by the department.
(2)
				  For transient noncommunity and type III public water supplies, the department
				  may require samples to be collected and analyzed at prescribed frequencies for
				  per- and polyfluoroalkyl substances.
(3) A groundwater supplier shall take at
				  least 1 sample at every entry point to the distribution system that is
				  representative of each well after treatment, also known as sampling point. Each
				  sample must be taken at the same sampling point unless conditions make another
				  sampling point more representative of each source or treatment plant.
(4) A surface water supplier, or combined
				  surface water and ground water, shall take at least 1 sample at points in the
				  distribution system that are representative of each source or at each entry
				  point to the distribution system after treatment, also known as sampling point.
				  Each sample must be taken at the same sampling point unless conditions make
				  another sampling point more representative of each source or treatment
				  plant.
(5) If a system draws water
				  from more than 1 source and the sources are combined before distribution, then
				  the supplier shall sample at an entry point to the distribution system during
				  periods of normal operating conditions when water that is representative of all
				  sources is being used.
(6) An
				  existing supplier with one or more samples taken at each sampling point
				  described in subrules (3), (4), or (5) of this rule as part of the State of
				  Michigans 2018/2019 Statewide PFAS Survey shall conduct initial sampling as
				  follows:
(a) A supplier with one or more
				  sample results greater than 50% of the MCL for a contaminant listed in rule
				  10604g shall collect samples from each sampling point beginning the first full
				  quarter following the effective date of this rule.
(b) A supplier with no detection or a
				  detection less than or equal to 50% of the MCL for a contaminant listed in rule
				  10604g shall collect at least 1 sample from each sampling point within 6 months
				  of the effective date of this rule.
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. 325.10719h - Disinfection byproducts; routine monitoring

Current through Vol. 24-12, July 15, 2024
Rule 719h.
(1) A
				  community or nontransient noncommunity water supply that is subject to
				  disinfection byproducts requirements of
				  R 325.10610d shall monitor at the
				  location or locations and dates identified in the monitoring plan in
				  R 325.10719e(5),
				  updated as required by
				  R 325.10719i. These community and
				  noncommunity water supplies are also considered "water supplies" or "supplies"
				  in this rule and
				  R 325.10719i to
				  R 325.10719n.
(2) The supply shall monitor at least the
				  number of locations identified in the following table:
Source Water Type
Population size category
Monitoring Frequency 
								  1
Distribution system monitoring locations total
								  per monitoring period 
								  2
Subpart H
less than 500
per year
2
Subpart H
500 to 3,300
per quarter
2
Subpart H
3,301 to 9,999
per quarter
2
Subpart H
10,000 to 49,999
per quarter
4
Subpart H
50,000 to 249,999
per quarter
8
Subpart H
250,000 to 999,999
per quarter
12
Subpart H
1,000,000 to 4,999,999
per quarter
16
Subpart H
greater than or equal to 5,000,000
per quarter
20
Groundwater
less than 500
per year
2
Groundwater
500 to 9,999
per year
2
Groundwater
10,000 to 99,999
per quarter
4
Groundwater
100,000 to 499,999
per quarter
6
Groundwater
greater than or equal to 500,000
per quarter
8
1 All supplies shall monitor
					 during month of highest DBP concentrations.
2 Supplies on quarterly
					 monitoring shall take dual sample sets every 90 days at each monitoring
					 location, except for subpart H supplies serving 500 to 3,300. Groundwater
					 supplies serving 500-9,999 on annual monitoring shall take dual sample sets at
					 each monitoring location. All other supplies on annual monitoring and subpart H
					 supplies serving 500 to 3,300 shall take individual TTHM and HAA5 samples
					 (instead of a dual sample set) at the locations with the highest TTHM and HAA5
					 concentrations, respectively. For supplies serving fewer than 500 people, only
					 1 location with a dual sample set per monitoring period is needed if the
					 highest TTHM and HAA5 concentrations occur at the same location and
					 month.
(3) An undisinfected supply
				  that begins using a disinfectant other than UV light shall consult with the
				  department to identify compliance monitoring locations for TTHM and HAA5 under
				  R 325.10610d and R 325.10719h to
				  R 325.10719n. The supply shall
				  then develop a monitoring plan under
				  R 325.10719i th at includes those
				  monitoring locations.
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. 325.10719i - Disinfection byproducts; monitoring plan

Current through Vol. 24-12, July 15, 2024
Rule 719i.
(1)
				  Both of the following provisions apply to developing the monitoring plan for
				  community or nontransient noncommunity water supplies that are subject to
				  disinfection byproducts requirements of
				  R 325.10610d:
(a) The supply shall develop and implement a
				  monitoring plan to be kept on file for department and public review. The
				  monitoring plan shall contain all of the following elements and be complete not
				  later than the date the supply conducts the initial monitoring under TTHM and
				  HAA5 provisions of
				  R 325.10610d and
				  R 325.10719h to
				  R 325.10719n:
(i) Monitoring locations.
(ii) Monitoring dates.
(iii) Compliance calculation
				  procedures.
(iv) Monitoring plans
				  for the other supplies in the combined distribution system if the department
				  has reduced monitoring requirements under
				  R 325.10733.
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. 325.10719k - Disinfection byproducts; conditions requiring increased monitoring

Current through Vol. 24-12, July 15, 2024
Rule 719k.
(1) A
				  community or nontransient noncommunity water supply that is subject to
				  disinfection byproducts requirements of R 325.10610d and that is required to
				  monitor at a particular location annually or less frequently than annually
				  under routine monitoring in R 325.10719h or reduced monitoring in R 325.10719j
				  shall increase monitoring to dual sample sets once per quarter, taken every 90
				  days, at all locations if a TTHM sample is greater than 0.080 mg/L or a HAA5
				  sample is greater than 0.060 mg/L at any location.
(2) The supply is in violation of the MCL
				  when the LRAA exceeds the MCLs in R 325.10610 (2), calculated based on 4
				  consecutive quarters of monitoring, or the LRAA calculated based on fewer than
				  4 quarters of data if the MCL would be exceeded regardless of the monitoring
				  results of subsequent quarters. The supply is in violation of the monitoring
				  requirements for each quarter that a monitoring result would be used in
				  calculating an LRAA if the supply fails to monitor.
(3) The supply may return to routine
				  monitoring once the supply has conducted increased monitoring for not less than
				  4 consecutive quarters and the LRAA for every monitoring location is less than
				  or equal to 0.060 mg/L for TTHM and less than or equal to 0.045 mg/L for
				  HAA5.
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. 325.10719l - Disinfection byproducts: operational evaluation levels

Current through Vol. 24-12, July 15, 2024
Rule 719l.
(1) The
				  community or nontransient noncommunity water supply that is subject to
				  disinfection byproducts requirements of R 325.10610d has exceeded the
				  operational evaluation level at a monitoring location where the sum of the 2
				  previous quarters' TTHM results plus twice the current quarter's TTHM result,
				  divided by 4 to determine an average, exceeds 0.080 mg/L, or where the sum of
				  the 2 previous quarters' HAA5 results plus twice the current quarter's HAA5
				  result, divided by 4 to determine an average, exceeds 0.060 mg/L.
(2) Both of the following provisions apply to
				  operational evaluations:
(a) A supply that
				  exceeds the operational evaluation level shall conduct an operational
				  evaluation and submit a written report of the evaluation to the department not
				  later than 90 days after being notified of the analytical result that causes
				  the supply to exceed the operational evaluation level. The written report shall
				  be made available to the public upon request.
(b) The operational evaluation shall include
				  an examination of system treatment and distribution operational practices,
				  including storage tank operations, excess storage capacity, distribution system
				  flushing, changes in sources or source water quality, and treatment changes or
				  problems that may contribute to TTHM and HAA5 formation and what steps could be
				  considered to minimize future exceedences. Both of the following provisions
				  apply to limiting the scope of the operational evaluation:
(i) The supply may request and the department
				  may allow the supply to limit the scope of the evaluation if the supply is able
				  to identify the cause of the operational evaluation level exceedance.
(ii) The request to limit the scope of the
				  evaluation does not extend the schedule in subdivision (a) of this subrule for
				  submitting the written report. The department shall approve this limited scope
				  of evaluation in writing and the supply shall keep that approval with the
				  completed report.
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. 325.10719n - Disinfection byproducts; reporting and recordkeeping requirements

Current through Vol. 24-12, July 15, 2024
Rule 719n.
(1) A
				  community or nontransient noncommunity water supply that is subject to
				  disinfection byproducts requirements of R 325.10610d shall report all of the
				  following:
(a) The supply shall report all of
				  the following information for each monitoring location to the department within
				  10 days of the end of a quarter in which monitoring is required:
(i) Number of samples taken during the last
				  quarter.
(ii) Date and results of
				  each sample taken during the last quarter.
(iii) Arithmetic average of quarterly results
				  for the last 4 quarters for each monitoring location (LRAA), beginning at the
				  end of the fourth calendar quarter that follows the compliance date and at the
				  end of each subsequent quarter. If the LRAA calculated based on fewer than 4
				  quarters of data would cause the MCL to be exceeded regardless of the
				  monitoring results of subsequent quarters, the supply shall report this
				  information to the department as part of the first report due following the
				  compliance date or anytime thereafter that this determination is made. If the
				  supply is required to conduct monitoring at a frequency that is less than
				  quarterly, the supply shall make compliance calculations beginning with the
				  first compliance sample taken after the compliance date, unless the supply is
				  required to conduct increased monitoring under R 325.10719k.
(iv) Whether, based on R 325.10610 (2), R
				  325.10610d and R 325.10719h to R 325.10719n, the MCL was violated at a
				  monitoring location.
(v) Any
				  operational evaluation levels that were exceeded during the quarter and, if so,
				  the location and date, and the calculated TTHM and HAA5 levels.
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. 325.10720 - Filtration and disinfection; filtration sampling requirements

Current through Vol. 24-12, July 15, 2024
Rule 720.
(1)
				  Subpart H supplies shall monitor under this rule to determine compliance with
				  R 325.10611a and
				  R 325.10611b.
(2) All of the following provisions are
				  turbidity monitoring requirements:
(a)
				  Supplies shall collect samples and perform measurements for turbidity at
				  locations representative of filtered water at regular intervals at least once
				  every 4 hours while the treatment plant is in operation.
(b) A public water supply may substitute
				  continuous turbidity monitoring for grab sample monitoring if the continuous
				  measurement is validated for accuracy on a regular basis using a protocol
				  approved by the department. Readings taken from a continuous recording
				  turbidimeter at regular intervals at least once every 4 hours may be used to
				  determine compliance with the treatment technique under
				  R 325.10611b. The turbidimeter
				  shall be calibrated using the procedure specified by the
				  manufacturer.
(c) Supplies using
				  conventional or direct filtration shall conduct continuous monitoring of
				  turbidity for each individual filter and shall calibrate turbidimeters using
				  the procedure specified by the manufacturer. Supplies shall record the results
				  of individual filter monitoring every 15 minutes.
(d) If there is a failure in the continuous
				  turbidity monitoring equipment described in subdivision (c) of this subrule,
				  then the supply shall conduct grab sampling every 4 hours instead of continuous
				  monitoring, but for not more than 5 working days after the failure of the
				  equipment for supplies serving 10,000 or more people or 14 days for supplies
				  serving fewer than 10,000 people before a violation is incurred.
(e) If the supply serves fewer than 10,000
				  people and consists of only 2 or fewer filters, then the supply may conduct
				  continuous monitoring of combined filter effluent turbidity instead of
				  individual filter effluent turbidity monitoring. Continuous monitoring shall
				  meet the same requirements in subdivisions (c) and (d) of this
				  subrule.
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. 325.10720a - Filtration and disinfection; reporting and recordkeeping

Current through Vol. 24-12, July 15, 2024
Rule 720a.
(1)
				  Suppliers required to monitor under R 325.10720 shall comply with reporting and
				  recordkeeping requirements specified in R 325.11502 and shall report to the
				  department the information required in this rule within 10 days after the end
				  of each month the system serves water to the public, unless otherwise
				  required.
(2) Suppliers shall
				  report turbidity measurements required under R 325.10611b and shall include all
				  of the following information:
(a) The total
				  number of filtered water turbidity measurements taken during the
				  month.
(b) The number and
				  percentage of filtered water turbidity measurements taken during the month that
				  are less than or equal to the turbidity limits under R 325.10611b(1)(a)(ii),
				  (b)(ii), or (c)(ii).
(c) The date
				  and value of any turbidity measurements taken during the month that exceed the
				  applicable maximum turbidity value in R 325.10611b(1)(a)(i), (b)(i), or
				  (c)(i).
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. 325.10720b - Enhanced treatment for Cryptosporidium; source water monitoring

Current through Vol. 24-12, July 15, 2024
Rule 720b.
(1)
				  This rule applies to subpart H supplies as set forth in R 325.10611d.
(2) Title 40 CFR part 141 Subpart W sections
				  pertaining to source water monitoring requirements, being 40 CFR §141.701
				  to 40 CFR §141.707, (2008), are adopted by reference, except that
				  provisions pertaining to unfiltered systems are not adopted by reference as
				  specified in subdivision (c) of this subrule. The adopted material is contained
				  in Title 40 CFR parts 136 to 149 which is available for purchase for $64.00 at
				  the time of adoption of these rules from the superintendent of documents at the
				  address in R 325.10116 (b). The adopted material is available for inspection
				  and a copy is available at no cost from the offices of the department at the
				  address in R 325.10116 (a). All of the following apply to the adopted material:
(a) Subpart W consists of all of the
				  following sections of Title 40 CFR part 141:
(i) 40 CFR §141.701 Source water
				  monitoring.
(ii) 40 CFR
				  §141.702 Sampling schedules.
(iii) 40 CFR §141.703 Sampling
				  locations.
(iv) 40 CFR
				  §141.704 Analytical methods.
(v) 40 CFR §141.705 Approved
				  laboratories.
(vi) 40 CFR
				  §141.706 Reporting source water monitoring results.
(vii) 40 CFR §141.707 Grandfathering
				  previously collected data.
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. 325.10720c - Enhanced treatment for Cryptosporidium; disinfection profiling and benchmarking; making significant change in disinfection practice

Current through Vol. 24-12, July 15, 2024
Rule 720c. Following the completion of initial source water
					 monitoring under 40 CFR 141.701 (a), as adopted by reference in R 325.10720b, a
					 Subpart H supply that is subject to R 325.10611d and that plans to make a
					 significant change to its disinfection practice, as defined in R 325.10722 (4)
					 (a), shall develop disinfection profiles and calculate disinfection benchmarks
					 for Giardia lamblia and viruses as described in R 325.10720d. Before changing
					 the disinfection practice, the Subpart H supply shall notify the department and
					 shall include in this notice all of the information in R 325.10722 (4) (b) (i)
					 to (iv).
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. 325.10720d - Enhanced treatment for Cryptosporidium; developing disinfection profile and benchmark

Current through Vol. 24-12, July 15, 2024
Rule 720d.
(1)
				  Subpart H supplies required to develop disinfection profiles under
				  R 325.10720c shall follow the
				  requirements of this rule. These Subpart H supplies are also considered
				  "supplies" in this rule. Supplies shall monitor under subrule (2) of this rule
				  to determine the total log inactivation for Giardia lamblia and viruses.
				  Supplies shall determine log inactivation for Giardia lamblia through the
				  entire plant, based on the protocol in
				  R 325.10722(3)(b).
				  Supplies shall determine log inactivation for viruses through the entire
				  treatment plant, based on the protocol in
				  R
				  325.10722(3)(c).
(2) Subpart H supplies with a single point of
				  disinfectant application before the entrance to the distribution system shall
				  conduct the monitoring in
				  R 325.10722(3)(a).
				  Supplies with more than 1 point of disinfectant application shall conduct the
				  monitoring in
				  R 325.10722(3)(a)
				  for each disinfection segment. Subpart H supplies shall monitor the parameters
				  necessary to determine the total inactivation ratio.
(3) Instead of conducting new monitoring
				  under subrule (2) of this rule, Subpart H supplies may elect to meet the
				  requirements of either of the following:
(a)
				  Supplies that have at least 1 year of existing data that are substantially
				  equivalent to data collected under
				  R 325.10722(3)(a)
				  to meet the requirements of subule (2) of this rule may use these data to
				  develop disinfection profiles as specified in this rule if the supply has
				  neither made a significant change to its treatment practice nor changed sources
				  since the data were collected. Supplies may develop disinfection profiles using
				  up to 3 years of existing data.
(b)
				  Supplies may use a disinfection profile or profiles developed under
				  R 325.10722 instead of developing a
				  new profile if the supply has neither made a significant change to its
				  treatment practice nor changed sources since the profile was developed.
				  Supplies that have not developed a virus profile under
				  R 325.10722 shall develop a virus
				  profile using the same monitoring data on which the Giardia lamblia profile is
				  based.
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. 325.10722 - Filtration and disinfection; disinfection profiling and benchmarking

Current through Vol. 24-12, July 15, 2024
Rule 722.
(1) A
				  subpart H supply making a significant change to its disinfection practice, as
				  described in subrule (4)(a)(i) to (iv) of this rule shall consult with the
				  department before making the change. An approved significant change in
				  disinfection practices shall not jeopardize current levels of
				  disinfection.
(2) A subpart H
				  community or nontransient noncommunity supply that develops a disinfection
				  profile under
				  R 325.10720c of weekly log
				  inactivations over 52 weeks shall report to the department under
				  R
				  325.10720a(5).
(3) All of the following provisions apply to
				  disinfection profiling:
(a) To determine the
				  total log inactivation for Giardia lamblia and viruses, supplies shall monitor
				  at least weekly for a period of 12 consecutive months. If supplies monitor more
				  frequently, the monitoring frequency shall be evenly spaced. Supplies that
				  operate for fewer than 12 months per year shall monitor weekly during the
				  period of operation. Supplies shall monitor all of the following parameters:
(i) If a disinfectant other than UV is used,
				  the temperature of the disinfected water shall be measured at each residual
				  disinfectant concentration sampling point during peak hourly flow or at an
				  alternative location approved by the department.
(ii) If chlorine is used, the pH of the
				  disinfected water shall be measured at each chlorine residual disinfect
				  disinfectant concentration sampling point during peak hourly flow or at an
				  alternative location approved by the department.
(iii) Disinfectant contact time or times
				  ("T") shall be determined during peak hourly flow.
(iv) Residual disinfectant concentration or
				  concentrations ("C") of the water before or at the first customer and before
				  each additional point of disinfectant application shall be measured during peak
				  hourly flow.
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. 325.10725 - Radionuclides; applicability; monitoring generally; reporting

Current through Vol. 24-12, July 15, 2024
Rule 725.
(1) A
				  community water supply, also known as "supply" in this rule, R 325.10726, R
				  325.10728, R 325.10729, and R 325.10730, shall monitor to determine compliance
				  with R 325.10603 and report to the department under these rules.
(2) For the purposes of monitoring for gross
				  alpha particle activity, radium-226, radium-228, uranium, and beta particle and
				  photon radioactivity in drinking water, "detection limit'' is defined in Title
				  40 CFR §141.25(c), which is adopted by reference in R 325.10605.
(3) The department may require more frequent
				  monitoring than specified in this rule, or may require confirmation samples,
				  when the department considers it appropriate for the protection of public
				  health or there is a need for additional sampling based on prior sampling
				  results.
(4) Each public water
				  supply shall monitor at a time designated by the department during each
				  compliance period.
(5) If the MCL
				  for radioactivity in R 325.10603 is exceeded, then the community water supply
				  shall notify the department under R 325.10734.