OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 01072
PWS Name: JOHNSON CREEK WATER SERVICE
 
Who Was Contacted and Phone: Aaron Olsen (503) 554-8333
Contact Date: 09/30/2015
Contacted By: BURNS, LAURA C (DWP)
Contact Method/Location: Office
 
Assistance Type: SURVEY/DEFICIENCY FOLLOW-UP
Reasons: SWTR
Operations
 
Details: SUMMARY: new contact time DETAILS: Information provided by Aaron Olson: “The pump runs for 18 minutes at 125 gpm, then rests for 12 minutes before the pump starts again. Averaging a constant flow of 75 gpm.”Calculation:30 minutes total cycle-- 18 minutes on-- 12 minutes off.18 min “on” x 125 gal/min =2250 gal/cycle9,620gal = 4.27 cycles to move water to 300,000 gal tank. 2250 gal/cycle 4.27 cycles x 30 minutes = 128 minutes contact timeJohnson Creek should now use 128 minutes for the CT calculations beginning October 1, 2015. ACTION NEEDED: None.

More information for this water system: SDWIS ID 3116
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