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. 325.10720e - Enhanced treatment for Cryptosporidium; reporting and recordkeeping requirements

Current through Vol. 24-12, July 15, 2024
Rule 720e.
(1)
				  Subpart H supplies that are subject to R 325.10611d shall report sampling
				  schedules under 40 CFR §141.702 and source water monitoring results under
				  40 CFR §141.706 unless they notify the department that they will not
				  conduct source water monitoring due to meeting the criteria of 40 CFR
				  §141.701 (d). These Subpart H supplies are also considered "supplies" in
				  this rule. The department adopts 40 CFR §141.701, 40 CFR §141.702,
				  and 40 CFR §141.706 by reference in R 325.10720b.
(2) Supplies shall report their
				  Cryptosporidium bin classification as described in R 325.10611e.
(3) Supplies shall report disinfection
				  profiles and benchmarks to the department as described in R 325.10720c to R
				  325.10720d before making a significant change in disinfection
				  practice.
(4) Supplies shall report
				  to the department under the following table for the microbial toolbox options
				  used to comply with treatment requirements under R 325.10611f. Alternatively,
				  the department may approve a supply to certify operation within required
				  parameters for treatment credit rather than reporting monthly operational data
				  for toolbox options.
Microbial Toolbox Reporting Requirements
Toolbox option
Supplies shall submit all of the following
								information:
On the following schedule:
(a) Watershed control program (WCP)
(i) Notice of intention to develop a new or continue
								an existing watershed control program.
Not later than 2 years before the applicable
								treatment compliance date in R 325.10611g.
(ii) Watershed control plan
Not later than 1 year before the applicable
								treatment compliance date in R 325.10611g.
(iii) Annual watershed control program status
								report.
Every 12 months, beginning 1 year after the
								applicable treatment compliance date in R 325.10611g.
(iv) Watershed sanitary survey report.
For community water supplies, every 3 years
								beginning 3 years after the applicable treatment compliance date in R
								325.10611g. For noncommunity water supplies, every 5 years beginning 5 years
								after the applicable treatment compliance date in R 325.10611g.
(b) Alternative source/intake management
Verification that supply has relocated the intake or
								adopted the intake withdrawal procedure reflected in monitoring results.
Not later than the applicable treatment compliance
								date in R 325.10611g.
(c) Presedimentation
Monthly verification of all of the following: (i)
								Continuous basin operation. (ii) Treatment of 100% of the flow. (iii)
								Continuous addition of a coagulant. (iv) Not less than 0.5-log mean reduction
								of influent turbidity or compliance with alternative department approved
								performance criteria.
Monthly reporting within 10 days following the month
								in which the monitoring was conducted, beginning on the applicable treatment
								compliance date in R 325.10611g.
(d) 2-stage lime softening
Monthly verification of both of the following: (i)
								Chemical addition and hardness precipitation occurred in 2 separate and
								sequential softening stages before filtration. (ii) Both stages treated 100% of
								the plant flow.
Monthly reporting within 10 days following the month
								in which the monitoring was conducted, beginning on the applicable treatment
								compliance date in R 325.10611g.
(e) Bank filtration
(i) Initial demonstration of both of the following:
								(A) Unconsolidated, predominantly sandy aquifer. (B) Setback distance of not
								less than 25 ft. (0.5-log credit) or 50 ft. (1.0-log credit).
Not later than the applicable treatment compliance
								date in R 325.10611g.
(ii) If monthly average of daily max turbidity is
								greater than 1 NTU then supply shall report result and submit an assessment of
								the cause.
Report within 30 days following the month in which
								the monitoring was conducted, beginning on the applicable treatment compliance
								date in R 325.10611g.
(f) Combined filter performance
Monthly verification of combined filter effluent
								(CFE) turbidity levels less than or equal to 0.15 NTU in not less than 95% of
								the 4-hour CFE measurements taken each month.
Monthly reporting within 10 days following the month
								in which the monitoring was conducted, beginning on the applicable treatment
								compliance date in R 325.10611g.
(g) Individual filter performance
Monthly verification of both of the following: (i)
								Individual filter effluent (IFE ) turbidity levels less than or equal to 0.15
								NTU in not less than 95% of samples each month in each filter. (ii) No
								individual filter greater than 0.3 NTU in 2 consecutive readings 15 minutes
								apart.
Monthly reporting within 10 days following the month
								in which the monitoring was conducted, beginning on the applicable treatment
								compliance date in R 325.10611g.
(h) Demonstration of performance
(i) Results from testing following a department
								approved protocol.
Not later than the applicable treatment compliance
								date in R 325.10611g.
(ii) As required by the department, monthly
								verification of operation within conditions of department approval for
								demonstration of performance credit.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(i) Bag filters and cartridge filter
(i) Demonstration that both of the following criteria
								are met: (A) Process meets the definition of bag or cartridge filtration. (B)
								Removal efficiency established through challenge testing that meets criteria in
								R 325.10611d to R 325.10611n and R 325.10720b to R 325.10720e.
Not
								later than the applicable treatment compliance date in R 325.10611g.
(ii) Monthly verification that 100% of plant flow was
								filtered.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(j) Membrane filtration
(i) Results of verification testing demonstrating
								both of the following: (A) Removal efficiency established through challenge
								testing that meets criteria in R 325.10611d to R 325.10611n and R 325.10720b to
								R 325.10720e. (B) Integrity test method and parameters, including resolution,
								sensitivity, test frequency, control limits, and associated baseline.
Not later than the applicable treatment compliance
								date in R 325.10611g.
(ii) Monthly report summarizing the following: (A)
								All direct integrity tests above the control limit. (B) If applicable, a
								turbidity or alternative state approved indirect integrity monitoring results
								triggering direct integrity testing and the corrective action that was taken.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(k) Second stage filtration
Monthly verification that 100% of flow was filtered
								through both stages and that first stage was preceded by coagulation step.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(l) Slow sand filtration as secondary filter.
Monthly verification that both a slow sand filter
								and a preceding separate stage of filtration treated 100% of flow from surface
								water or GWUDI sources.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(m) Chlorine dioxide
Summary of CT values for each day as described in R
								325.10611m.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(n) Ozone
Summary of CT values for each day as described in R
								325.10611m.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(o) UV
(i) Validation test results demonstrating operating
								conditions that achieve required UV dose.
Not later than the applicable treatment compliance
								date in R 325.10611g.
(ii) Monthly report summarizing the percentage of
								water entering the distribution system that was not treated by UV reactors
								operating within validated conditions for the required dose as specified in R
								325.10611m.
Within 10 days following the month in which
								monitoring was conducted, beginning on the applicable treatment compliance date
								in R 325.10611g.
(5) Supplies shall retain records under R
				  325.11508.