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: Anna Zaklikowski (503) 423-3822
Contact Date: 04/20/2010
Contacted By: MACPHERSON, JAMES (REGION 2)
Contact Method/Location: Office
 
Assistance Type: PLAN REVIEW
Reasons: SWTR
Disinfection Byproducts
 
Details: SUMMARY: Pre-Design Plans and Pilot Test Results DETAILS: Discuss planned use of permanganate to oxidize manganese and iron. Chlorine dioxide also evaluated, but concern over potential chlorite and chlorate formation affected decision to deploy. Ozone not tested due to high capital cost. Ferrate also discussed, but no current plan to apply. Alum provided better floc size than ACH and is the preferred coagulant. No other coagulants run in pilot test. Rapid sand flow rate discussed. Data for 7.5 gpm/ft2 reported as more than adequate to reduce turbidity. ACTION NEEDED: Review Pilot Test Report upon receipt.


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System Info :: Report for Lenders :: Alerts :: Violations :: Compliance & Enforcement :: Contacts & Advisories :: Site Visits :: Public Notice
Coliform Summary :: Coliform Results :: Sampling Schedule for Coliform :: Groundwater/GWUDI Source Details :: Plan Review :: Annual Fee
Chemical Group Summary :: Latest Chemical Results :: Entry Point Detects :: Single Analyte Results 
Chemical Schedule Summary :: Chemical Schedule Details
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