(SW profiling System has a Low Inadequate Distribution potential spreadsheet lines pressure are not or backflow provided violation for to loss properly prevention of the water Is Are Bulk failing pressure disinfected to on [insert lines system maintain after there (less station than 20 should be at adequate psi)*. name] repairs. bulk least used treatment weekly for water fill to document 20 / station*. Failure Presently, to psi at that as the Fill adequately (See some photo areas of #) required inactivation in all the disinfect necessary to after the LT2 rule drinking distribution Bulk fill (Bins achieve 2 or the in water lines system stations have > required higher total the are pressure following present a less system reduction or of repair than 20 can psi. potential Giardia system that is Air at lead This to low achieved. A all logs? Gap committed to introduction pressure connection. install completed or of creates copy must be maximum significant provided treatment) to into the risk provide for a EPA (141.711a).* to show pathway backflow distribution for and that this system. system significant Water to enter lines the deficiency must In order be to drinking has been disinfected water correct system this resolved. If according significant during to the system is accepted backflow deficiency, unable to you events standards must and obtain the (e.g. identify AWWA the therefore required C651) present cause(s) a of inactivation, the following potential low the system repair. public pressure health and should be provide threat. A modified to reduced increase the pressure of how it level of was backflow inactivation assembly corrected. (i.e. (RPZ) or installation of permanent air a second gap device method of must be inactivation installed at or installation this facility. of additional An RPZ must storage to be inspected increase and tested at contact time). least annually to ensure proper function. For corrective actions refer
profiling spreadsheet provided to the water system should be used weekly to document that the inactivation necessary to achieve the required total reduction of Giardia is achieved. A completed copy must be provided to EPA to show that this significant deficiency has been resolved. If the system is unable to obtain the required inactivation, the system should be modified to increase the level of inactivation (i.e. installation of a second method of inactivation or installation of additional storage to increase contact time). (SW > logs? System has a potential violation for failing to maintain adequate treatment for as required in the LT2 rule (Bins 2 or higher system or system that committed to install maximum treatment) (141.711a).* Are lines after are Distribution lines are not properly disinfected after repairs. Failure to adequately disinfect drinking water lines following repair can lead to introduction of into the distribution system. Water lines must be disinfected according to accepted standards (e.g. AWWA C651) following repair. Is there at least 20 psi at all in the at all Low pressure or loss of pressure (less than 20 psi)*. Presently, some areas of the distribution system have pressure less than 20 psi. This low pressure creates significant risk for backflow and system In order to correct this significant deficiency, you must identify the cause(s) of the low pressure and provide of how it was corrected. Bulk / Fill Air Gap or Inadequate backflow prevention on [insert station name] bulk water fill station*. (See photo #) Bulk fill stations present a potential provide a pathway for to enter the drinking water system during backflow events and therefore present a potential public health threat. A reduced pressure backflow assembly (RPZ) or permanent air gap device must be installed at this facility. An RPZ must be inspected and tested at least annually to ensure proper function. For corrective actions refer connection.
ss_wyoming_form.docx