(SW the online UVT (SW (SW (SW (SW The The System The System system system has has a a (SW Inadequate analyzer potential operators currently using do not a SCADA potential Treatment is not grab does violation sample. not have for set know violation up how to alarm for to Process (UV (UV (UV (UV failing properly a when calibrated an to monitoring Monitoring the for flow maintain meter UV on POE identify Surface chlorine an event operation one or occurs more residual Treatment at a >40 >40 >40 records of the and UV (greater report Is Are >40 this point (greater Plants. that than is not 40 gpm) disinfection gpm) gpm) gpm) before it than gpm prior to the 40 UV). to gpm the EPA (no first the Is Are Does UV) (greater units. than 40 the two Does 1st user standard of the The online there daily (141.720d5). the the user gpm water language) UV). (no chlorine a standard of the (141.74c2). residual As a system language) analyzer at the that utilizes UV know alarm within of entry disinfection to how kept 0.1 when was not achieve to to of an mg/L adequately flow ensure or calibrated and inactivation max 15% an periodically credit to meet flow of one verified. The the rate is chlorine requirements of not run event residual at the the Long Term time, point of entry 2 Enhanced lamp event measured by the Surface Water and status, is surveyor using a Treatment UV report handheld DPD Rule, you are it to device varied required to the substantially monitor the UVT EPA? from the flow rate at and reading by the each UV unit to UV online analyzer. ensure that the According to units are being EPA Method operated within 334.0: the validated Determination conditions. of Residual Currently, the Chlorine in flow meter at Drinking Water one or more of Using an the UV units is Chlorine inoperable. The Analyzer; system must during routine repair all flow calibration meters as checks of the necessary to online analyzer, allow for direct the continuous monitoring of analyzer the flow rate at chlorine each UV unit. residual reading must be within 0.1 mg/L or 15% (whichever is greater) of the
the online UVT analyzer using a grab sample. (SW (UV >40 gpm) Is there a to ensure max flow rate is not The system currently does not have a calibrated flow meter on one or more of the UV disinfection units. As a system that utilizes UV disinfection to achieve inactivation credit to meet the requirements of the Long Term 2 Enhanced Surface Water Treatment Rule, you are required to monitor the flow rate at each UV unit to ensure that the units are being operated within the validated conditions. Currently, the flow meter at one or more of the UV units is inoperable. The system must repair all flow meters as necessary to allow for direct monitoring of the flow rate at each UV unit. (SW (UV >40 gpm) Are daily kept of flow run time, lamp status, UV UVT and UV System has a potential violation for failing to maintain UV operation records (greater than 40 gpm UV) (141.720d5). (SW (UV >40 gpm) Does the know how to an event and report it to the EPA? The system operators do not know how to properly identify an and report it to the EPA (greater than 40 gpm UV). (no standard language) (SW (UV >40 gpm) Does the alarm when an event The SCADA is not set up to alarm when an event occurs (greater than 40 gpm UV). (no standard language) (SW Is this before the 1st user of the System has a potential violation for monitoring the POE chlorine residual at a point that is not prior to the first user of the water (141.74c2). (SW Are the two within 0.1 mg/L or 15% of one is Inadequate Treatment Process Monitoring for Surface Treatment Plants. The online chlorine residual analyzer at the of entry was not adequately calibrated and periodically verified. The chlorine residual at the point of entry measured by the surveyor using a handheld DPD device varied substantially from the reading by the online analyzer. According to EPA Method 334.0: Determination of Residual Chlorine in Drinking Water Using an Chlorine Analyzer; during routine calibration checks of the online analyzer, the continuous analyzer chlorine residual reading must be within 0.1 mg/L or 15% (whichever is greater) of the
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