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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00953
PWS Name:	WILLAMINA, CITY OF

Who Was Contacted and Phone:	Joe Fox, operator (503) 437-7003
Contact Date:	01/02/2007
Contacted By:	HENRY, ROBERT (DWP)
Contact Method/Location:	Field

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

Details:	SUMMARY: Contact tracer study DETAILS: Circuit rider was contacted by the City of Willamina to provide a contact tracer study for the disinfection of treated water. The City of Willamina provides treated water through a dual-train packaged treatment system. Disinfection is achieved through the addition of chlorine gas. Two onsite reservoirs (1.0 MG and 0.25 MG) act as clearwells for contact time. Testing was completed with the 0.25 MG reservoir out of service and the 1.0 MG reservoir at its low level (normal worst-case scenario). Completed CT study report. ACTION NEEDED: None