OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00257
PWS Name: DETROIT WATER SYSTEM
 
Who Was Contacted and Phone: Bob Bruce (503) 854-3496
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: Ct Tracer Study DETAILS: A new Ultrasonic flowmeter was installed on the systems 2100,000 gallon storage reservoir outlet piping. A CT Tracer study was requested to determine the current disinfection contact time. I reviewed project scope with the treatment plant operator and City volunteer (Retired water treatment plant professional). 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 study to take place on May 6th. ACTION NEEDED: Finalize data evaluation and theoretical contact times and perform study. Compile measured data into a report for the City and DWP.


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