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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 01449
PWS Name:	MARSHLAND WATER ASSOCIATION

Who Was Contacted and Phone:	John Crawford (503) 728-0998
Contact Date:	09/30/2010
Contacted By:	HENRY, ROBERT (DWP)
Contact Method/Location:	Field

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

Details:	SUMMARY: CT Tracer Study DETAILS: The system recently constructed a surface water treatment plant to treat water from Tandy Creek. This treatment plant consists of 2 pressure garnet sand filters follows by Strainrite cartridge filters. Disinfection is by sodium hypochlorite. The system provides water to 70 people through 32 connections. HBH was contacted by the district to provide assistance with a contact tracer study to determine the amount of contact time in the reservoir and transmission main before the first user. I met with water system staff at water treatment plant to determine methodology for the tracer testing. While on site, assisted staff with the calibration of the hypo feed pump, which was not feeding a consistent dosage. ACTION NEEDED: Develop methodology and perform tracer testing.