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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00457
PWS Name:	LAKE OSWEGO MUNICIPAL WATER

Who Was Contacted and Phone:	Kari Duncan (503) 635-0394
Contact Date:	03/01/2009
Contacted By:	FARRELLY, PETER (DWP)
Contact Method/Location:	Office

Assistance Type:	MONITORING
Reasons:	SWTR Operations

Details:	SUMMARY: Occasional IFE readings to replace CFE compliance readings DETAILS: Twice per year Lake Oswego will report the highest IFE reading instead of their CFE reading for 1-2 days on their SWTR reports. They will make a note of it on the report when it occurs. Lake Oswego has two lime feed systems. When they bring down their primary lime feeder, they employ the backup feeding system. The backup feeder dramatically affects the CFE readings, incorrectly indicating high turbidity break-through. This IFE replacement reading should only last about 4 days in a given year. ACTION NEEDED: none.