(SW achieve System has 1.0 a Is (SW (SW (SW it System System System has has a a Inadequate set log potential potential operators do potential filtration with violation inactivation violation for - not violation design know or for of Giardia at a not IFE how exceeding to check the operation*. the monitoring turbidimeters first user. and CFE repair turbidity Therefore, and not IFE limits membranes set for with bag if a and Adequate level the trigger continuously a direct system level / cartridge microbial Is must and recording install of Do of integrity filtration 0.15 NTU test and removal 0.15 an for fails. values IFE longer (no once failing to requires that NTU every turbidimeter than 15 15 Are Has report standard to the a cartridge on each for the > minutes minutes language) EPA to there system not be 15 membrane (membrane initiate a DIT PWS (141.551a2 / used at unit filtration) that how 141/551b2 (membrane or conditions to (a triggers filtration) (141.719b4) an 141.173b) exceeding its integrity (systems test not DIT (141.719b4) design when the and been (systems receiving not specifications be turbidity additional receiving (flow rate, exceeds 0.15 and filtration additional inlet pressure NTU credit filtration in under order the and and pressure to the receive the CFE when after credit under drop), and at the higher LT2ESWTR that the least - Giardia considered when LT2ESWTR cartridge be removal a once - a considered significant properly credits deficiency). a significant DIT installed in associated fails? (no deficiency). standard the housing (no with language) standard for for which it membrane this this language) was filtration. type designed. of The current treatment system does not have flowmeters or restrictors, nor pressure gauges to monitor pressure drop across the cartridges. It is unclear what the system design limitations are. The filter housings and cartridge
achieve 1.0 log inactivation of Giardia at the first user. Therefore, the system must install an IFE turbidimeter on each membrane unit that triggers an integrity test when the turbidity exceeds 0.15 NTU in order to receive the higher Giardia removal credits associated with membrane filtration. (SW Is and at least once System has a potential violation for not monitoring IFE continuously and recording values once every 15 minutes (membrane filtration) (141.719b4) (systems not receiving additional filtration credit under the LT2ESWTR - considered a significant deficiency). (no standard language) Is it set with a level of 0.15 NTU for > 15 (a DIT be when this System has a potential violation - IFE turbidimeters not set with a trigger level of 0.15 NTU for longer than 15 minutes to initiate a DIT (membrane filtration) (141.719b4) (systems not receiving additional filtration credit under the LT2ESWTR - considered a significant deficiency). (no standard language) (SW Do how to and when a DIT fails? System operators do not know how to check and repair membranes if a direct integrity test fails. (no standard language) (SW and Has the PWS been the CFE for this type of System has a potential violation for exceeding the CFE turbidity limits for bag / cartridge filtration and failing to report to the EPA (141.551a2 / 141/551b2 or 141.173b) (SW and Are there and after Inadequate filtration design or operation*. Adequate microbial removal requires that a cartridge system not be used at conditions exceeding its design specifications (flow rate, inlet pressure and pressure drop), and that the cartridge be properly installed in the housing for which it was designed. The current treatment system does not have flowmeters or restrictors, nor pressure gauges to monitor pressure drop across the cartridges. It is unclear what the system design limitations are. The filter housings and cartridge