OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00239
PWS Name: LONDON WATER CO-OP
 
Who Was Contacted: Terri Finn-Kadrmas
Contact Phone: 541-942-8563
Contact Date: 10/21/2021
Contacted By: CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location: Phone
 
Assistance Type: CIRCUIT RIDER ASSISTANCE
 
Details: Background/Problem Identification:

London Water Co-op (LWC) reached out for assistance in troubleshooting their water system after several positive tests for both total coliform and E. coli.

Assistance Provided:

The circuit rider worked with LWC over the phone and via email to assist in assessment of the water system to determine the location of the coliform intrusion. The following recommendations were made:

• Further coliform testing may help to locate the source of the coliform intrusion, we recommend the following sample locations:
o One sample from a port after the treatment process, but before entering the storage tanks
o One sample immediately after the storage tanks
o An additional sample in distribution, preferably distant from the WTP/tanks to catch a positive in the even that the first two samples are negative
•Beyond pulling these samples, I recommend that LWC should do the following:

o Inspect and confirm that there is no evidence of contamination in the water storage tanks
o Inspect the surface water source and upstream areas for evidence of animal activity
o Verify that there are no leaks in distribution, nor recent repairs made to broken main lines or service laterals

Follow-Up Actions Needed:

The circuit rider is available to assist further as needed.

Technical Reports to be Prepared and Expected Timeframe:

N/A



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