(SW Giardia System has and a (SW Inadequate virus potential inactivation violation inactivation for design or levels for one failing operation to year. consult (CT)*. This the information EPA prior to should making be a The Surface used significant to Water change complete to the Treatment If their required one Rule requires year > yes, 4 disinfection that water was logs? practices disinfection systems EPA profile (141.570d and or achieve at the 141.172c). profile least 99.99% should then (4-log) be kept in the removal plant’s and/or records inactivation indefinitely. of viruses. Failure to The cartridge have the filtration profile system available for employed is review not credited during with any sanitary virus removal surveys is a due to the large size of violation of the pores in 40 C.F.R. comparison §141.536. with the size of viruses. In addition, the UV system is not credited with virus inactivation due to the relatively high UV resistance of viruses. The system must therefore achieve 99.99% inactivation of viruses through chemical disinfection.
Giardia and virus inactivation levels for one year. This information should be used to complete the required one year disinfection profile and the profile should then be kept in the plant’s records indefinitely. Failure to have the profile available for review during sanitary surveys is a violation of 40 C.F.R. §141.536. (SW If yes, was EPA System has a potential violation for failing to consult the EPA prior to making a significant change to their disinfection practices (141.570d or 141.172c). (SW > 4 logs? Inadequate inactivation design or operation (CT)*. The Surface Water Treatment Rule requires that water systems achieve at least 99.99% (4-log) removal and/or inactivation of viruses. The cartridge filtration system employed is not credited with any virus removal due to the large size of the pores in comparison with the size of viruses. In addition, the UV system is not credited with virus inactivation due to the relatively high UV resistance of viruses. The system must therefore achieve 99.99% inactivation of viruses through chemical disinfection.
ss_wyoming_form.docx