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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00394
PWS Name:	IDANHA CITY WATER

Who Was Contacted and Phone:	Greg Benthin, Walt Callier (541) 897-2669
Contact Date:	04/22/2008
Contacted By:	ERBELE, HANK (DWP)
Contact Method/Location:	Field

Assistance Type:	CIRCUIT RIDER ASSISTANCE
Reasons:	N/A N/A

Details:	SUMMARY: Perform Contact time Tracer Study DETAILS: A new “Ultrasonic Flowmeter” was installed on the system’s 350,000 gallon storage reservoir outlet piping. A CT Tracer Study was requested to determine the current disinfection contact time. I reviewed project scope with the DRC and treatment plant operator. I toured the treatment and storage facilities including disinfection feed system, sample points, storage vessel and flow configuration. I drafted process flowcharts and operation plan for process adjustments for the CT Tracer Study. ACTION NEEDED: Finalize data evaluation and theoretical contact times. Perform Study and compile measured data into a report for the City and DWP.