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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00854
PWS Name:	SWISSHOME VILLAGE

Who Was Contacted:	Matt Grassauer
Contact Phone:	541-972-1859
Contact Date:	12/22/2020
Contacted By:	MACPHERSON, JAMES (DWP)
Contact Method/Location:	Phone

Assistance Type:	WATER QUALITY ALERT RESPONSE
Reasons:	Disinfection Byproducts

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) , TTHM See also: 08/04/2021 CHEM8965 - 06/15/2020 - TTHM See also: 06/16/2020 CHEM8897 - 03/26/2020 - TOTAL HALOACETIC ACIDS (HAA5)