OHA Drinking Water Services
Contact Report Details
|PWS ID:||OR41 00854|
|PWS Name:||SWISSHOME VILLAGE|
|Who Was Contacted:||Matt Grassauer|
|Contacted By:||MACPHERSON, JAMES (DWP)|
|Assistance Type:||WATER QUALITY ALERT RESPONSE|
|Details:||Older alerts were addressed with several corrections: cleaning of clearwell sediment, lowering of clearwell volume, installation of standpipe in clearwell, change from flow-based chlorinator to electrically powered chemical feed pump, and a tracer study.
Discussed potential reasons why DBPs concentrations rose again in December. Most likely it was due to the transition from the flow-based chlorinator pump to a diaphragm pump, resulting in higher dose than needed to meet CT. May need to lower the standpipe elevation in the clearwell if problem persists after getting dosing consistency under control.
|Associated Alerts:||CHEM9181 - 12/22/2020 - TOTAL HALOACETIC ACIDS (HAA5) , TOTAL TRIHALOMETHANES (TTHM)
CHEM8965 - 06/15/2020 - TOTAL TRIHALOMETHANES (TTHM) See also: 06/16/2020
CHEM8897 - 03/26/2020 - TOTAL HALOACETIC ACIDS (HAA5)