OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00164
Who Was Contacted and Phone: Cruz Flores (503) 436-1581
Contact Date: 10/01/2010
Contacted By: HENRY, ROBERT (DWP)
Contact Method/Location: Field
Reasons: N/A
Details: SUMMARY: CT Tracer Study DETAILS: The City owns and operates a surface water system that provides water to 3,100 people through 1,600 connections. Raw water from springs and Elk Creek is treated by a slow sand filter treatment plant. Disinfection is through the addition of gaseous chlorine. A large reservoir acts as storage and the contact vessel prior to first user. HBH was contacted by the City to provide assistance with a contact tracer study to determine the amount of contact time in the system before the first user. I visited the system to discuss the method by which to conduct the contact tracer study. ACTION NEEDED: Develop methodology for the testing, coordinate with DWP personnel and perform tracer testing.

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