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| Introduction :: Data Search Options :: Water System Search :: DWS Home :: DWS Rules |
OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00338 | ||
| PWS Name: | GRAND RONDE COMMUNITY WTR ASSN | ||
| Who Was Contacted: | Karl Ekstrom | ||
| Contact Phone: | -- (Email address hidden) | ||
| Contact Date: | 04/12/2023 | ||
| Contacted By: | BOVA, JUSTINE (POLK COUNTY) | ||
| Contact Method/Location: | |||
| Assistance Type: | VIOLATION RESPONSE | ||
| Reasons: | Coliform |
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| Details: | Grande Ronde water got circuit rider assistance in order to locate the source of coliform contamination. A site visit occurred on February 13th to find the issue. There are a few causes for concern including an accumulation of plant debris in the grates, an improperly terminated Air Relief Valve, and crumbling grout surrounding the drain. However, these are not assumed to be the source of the total coliform positive samples. The likely cause was determined to be an Air Relief/Overflow valve which alternates between surging water and negative pressure air flow. During the negative pressure air flow, surrounding vegetation and debris can be pulled in. The recommended solution is to remove the one-way valve and put an approved vent or air/vacuum relief valve in its place. I talked with Karl on 4/19/2023 at 4:35 pm, they are going to use an ice pig on 2.5 miles of old pipe. They are in the process of hiring a contractor to redo the grout surrounding the drain. Karl will follow up with an email/letter once all the concerns in the circuit riders report have been addressed. CT |
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| Associated Violations: | Viol #903403058, 12/21/2022 - 01/01/2023: GWR - Source Sample - Late/Nonreporting |
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