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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00463
PWS Name:	LAKESIDE WATER DISTRICT

Who Was Contacted and Phone:	Marty Ball (541) 260-7794
Contact Date:	08/03/2012
Contacted By:	MACPHERSON, JAMES (REGION 2)
Contact Method/Location:	Office

Assistance Type:	OTHER REGULATORY - REGULATORY ASSISTANCE
Reasons:	SWTR None

Details:	SUMMARY: Required CT values from look-up tables DETAILS: When using the look-up tables for required CT, round pH values UP and temperature values DOWN. Currently the closest value is being used. If pH is 7.1, then the table with pH of 7.5 should be used. If the temperature is 11 degrees C, the table for 10 degrees C should be used. There is a regression equation available that will calculate the required CT very accurately without need for rounding. Past efforts to email this to Lakeside have not been successful. ACTION NEEDED: none