OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00251 | ||
| PWS Name: | HOPEWELL WATER COMPANY | ||
| Who Was Contacted and Phone: | Gary VanDerVeen (503) 434-7439 | ||
| Contact Date: | 02/17/2016 | ||
| Contacted By: | HOFELD, EVAN (REGION 1) | ||
| Contact Method/Location: | Office | ||
| Assistance Type: | WATER QUALITY ALERT RESPONSE | ||
| Reasons: | GWR GWR |
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| Details: | SUMMARY: 4-LOG Treatment Confirmed DETAILS: This system went on a boil water advisory after e-coli was confirmed through sampling on 12/8/14 from the Nelson Spring (SRC-AA). DWS received a memorandum from HBH Engineering on 4/15/15 confirming 4 log viral inactivation based on contact time achieved during flow through a pipeline during peak flow conditions. In the memo, HBH recommends a minimum chlorine residual of 0.8 mg/l at the entry point. On 4/16/15, DWS received a copy of a letter from Yamhill County to Hopewell Water Company informing them of the monitoring requirements and minimum chlorine residual to achieve 4 log viral inactivation for the Nelson Spring source and enclosing the necessary monthly monitoring form for their use. System has been conducting compliance monitoring since 4/1/15. ACTION NEEDED: System to continue daily compliance monitoring demonstrating that they meet a minimum entry point residual of 0.8 mg/l for 4-log viral disinfection at entry point A (EP-A) for the Nelson Spring. | ||
| Associated Alerts: | COLI13697 - 12/11/2014 - COLIFORM (TCR) , E. COLI COLI13697 - 12/11/2014 - COLIFORM (TCR) , E. COLI COLI13697 - 12/11/2014 - COLIFORM (TCR) , E. COLI COLI13697 - 12/11/2014 - COLIFORM (TCR) , E. COLI COLI13697 - 12/11/2014 - COLIFORM (TCR) , E. COLI |
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