R 325.10717b Special monitoring.

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. (2) An analysis for a contaminant or parameter listed in this rule shall be conducted only by laboratories certified to conduct that analysis under part 27 of these rules or approved by the United States EPA.