R 325.10719f Disinfectant residuals, disinfection byproducts, and disinfection byproduct precursors; reporting and recordkeeping.

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).