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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 95068
PWS Name:	SUNNY WOLF CHARTER PRESCHOOL

Who Was Contacted:	Sara Gray
Contact Phone:	541-866-2735
Contact Date:	11/04/2021
Contacted By:	CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location:	Phone

Assistance Type:	CIRCUIT RIDER ASSISTANCE

Details:	Background/Problem Identification: Zach Golik, from OHA, requested that a 4-log disinfection verification be calculated for Sunny Wolf Charter Preschool. Assistance Provided: Civil West worked with Sara Gray of Sunny Wolf Charter Preschool to complete the 4-log Disinfection Verification worksheet. Based on the available information and previous site visits, we determined that required CT of the system is 6, and the available CT of the system is 7, and as such the minimum free chlorine residual is 1.03 mg/L. We recommend that the system conservatively target a minimum free chlorine residual at first user of 1.2 mg/L to provide some insurance against possible fluctuations in the system. Follow-Up Actions Needed: None at this time. Technical Reports to be Prepared and Expected Timeframe: Please see the attached 4-log Disinfection Verification worksheet.