OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 05581
Who Was Contacted: Corinne Clifton
Contact Phone: 541-347-1135 (Email address hidden)
Contact Date: 04/20/2021
Contacted By: DOWNS, KENT (DWP)
Contact Method/Location: Phone
Assistance Type: OTHER REGULATORY - Assessment of the longevity of the media in the GAC reactor
Details: 04.21.21 - I spoke with Corinne over the phone and corresponded via email also. Weiss is having issues with DBPs. We discussed the operation of their system and possible options to address the problem. Corinne expressed interest in working with our circuit rider - technical assistance. I contacted Marlin via email and Marlin email me back informing me that Dan Vaage, with Civil West, would be the project manager contacting Corinne.

These are the two main issues Corinne is hoping to get help with:

1. Establish a method to determine the efficacy of the GAC filter and to determine when the media needs to be replaced. When media is new, Weiss Estates DBP test results are below the maximum contamination level, but as time goes on DBPs begin to rise again.

David Funderburk who installed and maintains the system, seems to believe that they need to do a DBP test at the Sample Tap located after the GAC filter. Question is: is this going to determine how effective the media is? or do they need another kind of test such as a TOC or SOC?

2. Conduct a new tracer study to determine contact time to meet CT value.

Chlorine injection point was significantly moved when the GAC filter was installed. However, Weiss Estates is still using the same contact time (T) to determine the CT value as was determined in their last contact tracer study conducted by Rob Henry - apparently several years ago.

For further information on this public water system, click on the area of interest below:
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
DBPs :: TOC & Alkalinity :: DBP Sample Sites :: FANLs :: MRDL :: Turbidity :: SWTR :: RAA :: LRAA For SDWIS: 3923