OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 01265 | ||
| PWS Name: | ARRAH WANNA WATER COMPANY | ||
| Who Was Contacted and Phone: | David Jacob (503) 310-9262 | ||
| Contact Date: | 05/24/2017 | ||
| Contacted By: | FARRELLY, PETER (DWP) | ||
| Contact Method/Location: | Office | ||
| Assistance Type: | SURVEY/DEFICIENCY FOLLOW-UP | ||
| Reasons: | Chlorine SWTR |
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| Details: | SUMMARY: Increasing chlorine to 2ppm to achieve CT DETAILS: Water System assumed too much effective volume in contact tank. (Tracer study performed in mid May 2017 found an effective volume of 180 gallons... Or a baffling factor of 0.18 on the 1,000 gal contact tank.) David will increase chlorine residual to 2 ppm to meet CTs. David has meanwhile been acquiring a new well for future use. ACTION NEEDED: Assure CTs are met. (Began accurate calculations and meeting CTs in last weeks of May.) Re-confirm predicted dates for transitioning to groundwater source. (see next contact report) |
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