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OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 06308
PWS Name: PENINSULA ROAD WATER ASSOCIATION
 
Who Was Contacted: Bruce Herbert
Contact Phone: 541-997-8507
Contact Date: 04/04/2022
Contacted By: CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location: Field
 
Assistance Type: CIRCUIT RIDER ASSISTANCE
 
Details: Background/Problem Identification:

Daniel Hough of OHA put the circuit rider in contact with Bruce Herbert of Peninsula Road Water Association (PRWA) to assist in selecting surface water treatment for their newly re-classified OVS (Oregon Very Small) water system.

Assistance Provided:

The circuit rider spoke at length with Bruce Herbert about the existing system and the new requirements. The circuit rider also reached out to Daniel Hough of OHA to confirm details of the new OVS regulations and available treatment options. A site visit to Peninsula Road Water Association was made on 04/08/2022 to assess the existing system and discuss the available treatment options with Bruce Herbert.

Based on the nature of the existing system and the available treatment options outlined in “OAR 333-061-0100 - Requirements for Oregon Very Small Water Systems”, we recommend that PRWA install cartridge filtration, an NSF 55 Class A UV unit, and a flow-paced sodium hypochlorite disinfection system. The equipment required for such treatment is outlined below:

•Three stage bag/cartridge filtration, starting with a bag filter followed by a 10µ, 5µ, and finally a 1µ cartridge filter
•An NSF 55 certified Class “A” UV system appropriately sized for the system’s flowrate.
•A Dosatron or Stenner/LMI dosing pump, and a 20-50 gallon “day tank”. The disinfection system MUST dose proportionally to the output flow of the water treatment plant. We also recommend a digital chlorine test kit be purchased to accurately monitor the chlorine residual in distribution.

Follow-Up Actions Needed:

The circuit rider can assist further with equipment selection and/or a simple schematic when the water system is ready to proceed with upgrading the existing system.

Technical Reports to be Prepared and Expected Timeframe:

N/A

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