OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 00367
PWS Name: HEBO JOINT WATER & SANITARY AUTH
 
Who Was Contacted: Justin Hartford
Contact Phone: 503-392-6100
Contact Date: 10/27/2022
Contacted By: CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location: Field
 
Assistance Type: CIRCUIT RIDER ASSISTANCE
 
Details: Background/Problem Identification:

The circuit rider was contacted by Evan Hofeld of OHA to assist with a copper exceedance at Hebo Joint Water & Sanitary Auth.

Assistance Provided:

The circuit rider visited the site and worked with J. Hartford to troubleshoot their recent copper exceedance. J. Hartford also had an issue (potential line leaks) with air in the 2” HDPE (mostly) transmission line from the spring source to the WTP. The copper exceedance apparently occurred during the same time that the water system was struggling with the transmission main issue. The soda ash is dosed based off meter data provided by a 4” line that flows into the reservoir. The circuit rider believes that due to the greatly diminished flow, that the 4” meter is likely providing an erroneous reading indicating that the flow is even less than reality. This will cause the soda ash dosing pump to dose less than it should. Heath Cokeley of OAWU was contacted to assist further with leak detection on the transmission main from the spring source to the WTP.

We recommend that the water system find and repair the leaks in the transmission main to get the water flowing at the proper rate to get the meter back in range. HJWSA should also consider upgrading their WTP metering by controlling the dosing pumps (soda ash and sodium hypochlorite) from a 2” meter installed on the influent side of the WTP. The smaller meter should give better accuracy at the lower flowrates seen at the WTP.

Follow-Up Actions Needed:

The circuit rider is available to assist further as needed.

Technical Reports to be Prepared and Expected Timeframe:

N/A

More information for this water system: SDWIS ID 4318
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