OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details
PWS ID: OR41 91700
PWS Name: PIONEER VILLA
 
Who Was Contacted: John Rossell
Contact Phone: 541-466-3916
Contact Date: 05/18/2022
Contacted By: CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location: Phone
 
Assistance Type: CIRCUIT RIDER ASSISTANCE
 
Details: Background/Problem Identification:

The circuit rider was contacted by Garren Friedemann regarding having a corrosion control method selected and in place if they exceed the MCL for lead again.

Assistance Provided:

The circuit rider received both requested rounds of WQPs from Garren. The results of the WQP tests are summarized and averaged in the table below:

Kitchen Deli EP Kitchen Deli ep

4/25 4/25 4/25 5/9 5/9 5/9 avg

Sp. 864 875 892 879 895 894 883
~TDS 540 547 558 549 559 559 552
Alkm 160 160 160 160 160 160 160
Calcium 65.2 67.7 64.1 61.1 60.7 59.8 63.1
pH 7.2 7.2 7.1 7.4 7.4 7.6 7.3
Temperature - oC 15.0 16.0 15.0 14.5 16.0 15.0 15.3
DIC (Appx. B est.) 43 43 44 41 41 40 42
Target saturation pH = 7.5

Based on the available data and employing the EPA OCCT’s recommendations for corrosion control, flow chart 1b calls for using orthophosphate, unless there is iron or manganese present. Since Pioneer Villa uses a greensand filter, we assume any iron and/or manganese is either not present or reduced to a low level and that the recommendation of orthophosphate is valid.

Follow-Up Actions Needed:

The circuit rider is available to assist with selection of corrosion control equipment when required.

Technical Reports to be Prepared and Expected Timeframe:

N/A

More information for this water system: SDWIS ID 993
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