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

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. Toolbox option Supplies shall submit all of the following information: On the following schedule: (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. Toolbox option Supplies shall submit all of the following information: On the following schedule: (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 filters (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. Toolbox option Supplies shall submit all of the following information: On the following schedule: (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. Toolbox option Supplies shall submit all of the following information: On the following schedule: (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.