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OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00149 | ||
| PWS Name: | BROOKINGS, CITY OF | ||
| Who Was Contacted: | Yvonne Mazza-Lappi | ||
| Contact Phone: | 303-981-3577 | ||
| Contact Date: | 07/09/2019 | ||
| Contacted By: | PARRY, BETSY (DWP) | ||
| Contact Method/Location: | Phone | ||
| Assistance Type: | SURVEY/DEFICIENCY FOLLOW-UP | ||
| Survey: | 10/31/2018 | ||
| Reasons: | GWR |
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| Details: | I emailed Brookings yesterday because their deadline for resolving significant deficiencies is approaching (July 18) and they had one left - installing a raw water sample tap. At Brookings, this will require more modifications than usual at a GW system because they currently inject chlorine into the "wet well" of their infiltration gallery, so they cannot collect an untreated sample. Yvonne Mazza-Lippe phoned me back. She is a drinking water compliance specialist for Jacobs Engineering. She and our main PWS contact, Mark Haglund, will be sending me a corrective action plan with a proposed resolution date. She informed me that Jacobs will be conducting some tracer studies of their own to look at alternatives for CT segments. They would like to get those study results back before deciding how best to address this deficiency while retaining adequate disinfection. (However, because the chlorinated line from the infiltration gallery to the plant is some 3 miles long, I can't imagine there would be any trouble with contact time if they simply injected the chlorine into the effluent line from the wet well rather than directly into the well. That is what their neighbor Harbor Water PUD did a couple years ago to resolve the same deficiency at their infiltration gallery.) Yvonne asked about an acceptable compliance timeline. Because I do not see any risk to health or functionality in the meantime, I said they could propose a resolution deadline of a few months out. A problem would only arise if test results show the presence of total coliform in the distribution, requiring a triggered raw water sample. This has happened before (in 2018), when they had to change operations for a couple days (stop down-well chlorinating) in order to collect a raw sample. That arrangement does not comply with the federal Groundwater Rule. |
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