COLIFORM INVESTIGATION. An evaluation to identify the possible presence of sanitary defects, defects in distribution system coliform monitoring practices, and the likely reason that the Coliform Investigation was triggered at the public water system.
COLIFORM INVESTIGATION. An investigation conducted by Partners and is a more detailed and comprehensive examination of a water system (including the system’s monitoring and operational practices) than a Level 1 Coliform Investigation. Minimum elements include those that are part of a Level 1 investigation and additional review of available information, internal and external resources, and other relevant practices. Sanitary defects are identified and a schedule for correction is established.
COLIFORM INVESTIGATION. An investigation conducted by the water system or a representative thereof. Minimum elements of the investigation include review and identification of atypical events that could affect distributed water quality or indicate that distributed water quality was impaired; changes in distribution system maintenance and operation that could affect distributed water quality (including water storage); source and treatment considerations that bear on distributed water quality, where appropriate (for example, whether a Groundwater system is disinfected); existing water quality monitoring data; and inadequacies in sample sites, sampling protocol, and sample processing. Partners review sanitary defects identified and approves corrective action schedules.
COLIFORM INVESTIGATION. An investigation conducted by LPHA and is a more detailed and comprehensive examination of a water system (including the system’s monitoring and operational practices) than a level 1 investigation. Minimum elements include those that are part of a level 1 investigation and additional review of available information, internal and external resources, and other relevant practices. Sanitary defects are identified and a schedule for correction is established.
COLIFORM INVESTIGATION. An investigation conducted by Partners and is a more detailed and comprehensive examination of a water system (including the system’s monitoring and operational practices) than a level 1 investigation. Minimum elements include those that are part of a level 1 investigation and additional review of available information, internal and external resources, and other relevant practices. Sanitary defects are identified and a schedule for correction is established. MAXIMUM CONTAMINANT LEVEL (MCL) VIOLATION: MCL violations occur when a public water system’s water quality test results demonstrate a level of a contaminant that is greater than the established Maximum Contaminant Level. MONITORING OR REPORTING (M/R) VIOLATION: Monitoring or Reporting violations occur when a public water system fails to take any routine samples for a particular contaminant or report any treatment performance data during a compliance period, or fails to take any repeat samples following a coliform positive routine or where the public water system has failed to report the results of analyses to DWS for a compliance period. OREGON VERY SMALL (OVS):NON-EPA WATER SYSTEM (OVS): A public water system serving 4-14 connections or 10-24 people during at least 60 days per year. NON-TRANSIENT NON-COMMUNITY WATER SYSTEM (NTNC): A public water system that is not a Community Water System and that regularly serves at least 25 of the same persons over 6 months per year.
