OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00062 | ||
| PWS Name: | YOUNGS RIVER LEWIS & CLARK WD | ||
| Who Was Contacted: | Carl Gifford | ||
| Contact Phone: | 503-325-4330 (Email address hidden) | ||
| Contact Date: | 03/02/2020 | ||
| Contacted By: | FARRELLY, PETER (DWP) | ||
| Contact Method/Location: | Phone | ||
| Assistance Type: | WATER QUALITY ALERT RESPONSE | ||
| Reasons: | Disinfection Byproducts |
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| Details: | Carl and I spoke about his following strategy, in rough order: 1. Sample TOC at both sources: North and South forks. 2. Sample TOC after membrane filters, in part to calculate TOC removal by the WTP. 3. Reduce further the Aspmo Tank level (recently reduced to ~75% full) 4. Relatedly, reduce chlorine dose while keeping a detectable residual at ends of distribution (currently ~0.6 mg/L). (Balance 3 & 4) 5. Fine-tune the auto-flusher at the Fort Clatsop sample site. Then, 6. Research whether installing coagulation would help, given current TOC removals. Maybe it won’t help? 7. Check-in with the Circuit Rider to see if they can add anything. Check back in April, give or take. |
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| Associated Alerts: | CHEM8859 - 02/28/2020 - TOTAL HALOACETIC ACIDS (HAA5) CHEM8664 - 11/04/2019 - TOTAL HALOACETIC ACIDS (HAA5) , TTHM See also: 12/04/2019 CHEM8480 - 09/04/2019 - TTHM See also: 10/25/2019 CHEM8385 - 07/01/2019 - TOTAL HALOACETIC ACIDS (HAA5) , TTHM See also: 07/01/2019, 07/09/2019 |
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