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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00587
PWS Name:	ONTARIO, CITY OF

Who Was Contacted:	Kim Lord
Contact Phone:	541-889-8011
Contact Date:	03/02/2018
Contacted By:	GOSS, BILL (DWP)
Contact Method/Location:	Phone

Assistance Type:	OTHER REGULATORY - IFE Valve Issue Causing Turbidity Spikes
Reasons:	SWTR

Details:	Kim called DWS to discuss an operational issue at the "Old Plant". A mechanical issue with the individual filter effluent (IFE) valves is causing them to open suddenly instead of in a slow controlled manner. When they suddenly open fully when the IFE drops to 0.1 NTU after a backwash, it causes a sudden increase in the filter loading rate and a turbidity spike. The spikes are brief and none have occurred during the 4-hour readings in the monthly report. Parts are on order to repair the valves. Operators will use vigilance to manage the valves until repairs are completed. No further action needed at this time.