OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00205
PWS Name: COOS BAY NORTH BEND WTR BRD
 
Who Was Contacted and Phone: Robert Buras (541) 267-3128
Contact Date: 04/07/2011
Contacted By: MACPHERSON, JAMES (REGION 2)
Contact Method/Location: Office
 
Assistance Type: OTHER REGULATORY - REGULATORY ASSISTANCE
Reasons: SWTR
None
 
Details: SUMMARY: Peak Hourly Flow DETAILS: Calculation of peak hourly flow can be by using an average of the maximum flows over the hour of highest total flow. (Data resolution for flow rate is much less than one minute at CBNB.) The lowest chlorine residual during that hour of peak flow may be used to calculate CT, except where unusually low chlorine residuals are observed close in time to, but outside, the peak hourly flow. Professional judgement is required to decide if a chlorine residual occurring outside the peak hour of flow should be used to calculate CT. ACTION NEEDED: None


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Lead & Copper :: Corrosion Control (LCR) :: Nitrate :: Arsenic :: Radionuclides :: GWR 4-Log :: LT2 :: Cyanotoxins :: PFAS
DBPs :: TOC & Alkalinity :: DBP Sample Sites :: FANLs :: MRDL :: Turbidity :: SWTR :: RAA :: LRAA For SDWIS: 3881