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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00236
PWS Name:	COTTAGE GROVE, CITY OF

Who Was Contacted and Phone:	Ray Pardee (541) 228-0179
Contact Date:	09/23/2009
Contacted By:	POTTS, JOHN (DWP)
Contact Method/Location:	Field

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

Details:	SUMMARY: Tracer Srudy DETAILS: System has recently activated a new membrane WTP at the Row River WTP facility replacing the existing package treatment plant. DWP is requiring a chlorine contact time tracer study as the flow has increased greater than 10%. Effluent flow meters are installed after the clearwell and after the two reservoirs. I finished the data review and evaluated the information to determine chlorine contact. I completed the CT study report and sent if to Rob Henry for review and comment. I sent copies to DWP staff in Springfield and to the City of Cottage Grove. ACTION NEEDED: None unless requested.