401 KAR 8:400.  Synthetic Organic Chemicals for drinking water.

The system shall collect one set of samples per entry point to the distribution system or representative site of each source for four consecutive quarters at initiation of water system operation. A system with a population equal to or less than 3,300 shall collect one set within each three-year compliance period.

A system with a population greater than 3,300 shall collect two quarterly samples within 12 months during each three-year compliance period. If any contaminant exceeds the respective detection limit, the system shall sample the contaminant quarterly. 

A surface water system shall sample the contaminant(s) for a minimum of four consecutive quarters with results less than the maximum contaminant level (MCL); then, with Drinking Water Branch approval, the system shall sample the contaminant(s) annually for three consecutive years during highest historical quarter. A groundwater system shall sample the contaminant(s) for a minimum of two consecutive quarters with results less than the MCL; then, with Drinking Water Branch approval, the system shall sample the contaminant(s) annually for three consecutive years during highest "historical" quarter. The system may then, with Drinking Water Branch approval, return to the original appropriate monitoring schedule. A confirmation sample collected within two weeks at the same sampling point as an MCL exceedance may be averaged with the first sample to determine compliance.

Technical fact sheet on synthetic organic chemicals.