OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00164
Who Was Contacted and Phone: Dan Grassick (503) 436-1581
Contact Date: 09/20/2013
Contacted By: KALISH, FRED (REGION 1)
Contact Method/Location: Office
Reasons: Coliform
Details: SUMMARY: E Coli Pos in Annual Sample from Howell Spring DETAILS: DWS received notification that Source sample (annual assessment sample) from Howell Spring was TC+ and Ecoli + therefore I contacted Dan to discuss followup sampling. I notified Dan that they were required to take 5 additional confirmation samples from Howell Spring asap. I also requested chlorine residual information from entry point (at or before first user) for the last 5 days including this morning (they do daily grabs according to most recent WSS). I also recommended that they pull one coliform sample at or near the first user to verify the absence of coliform in the distribution system. ACTION NEEDED: Wait for chlorine residuals. Per their approved tracer study approved in 2010, as long as they have had a detectable residual at the entry point since 9/18/13 extending through today, they should have adequate contact time and chlorine residual to achieve 4 log viral innactivation - and therefore not need to be placed on boil even if the confirmation source samples confirm E coli.
Associated Alerts: COLI12142 - 09/20/2013 - COLIFORM, E. COLI , COLIFORM, TOTAL (TCR)

COLI12142 - 09/20/2013 - COLIFORM, E. COLI , COLIFORM, TOTAL (TCR)

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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: 3880