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OHA Drinking Water Services
Contact Report Details |
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| PWS ID: | OR41 00660 | ||
| PWS Name: | WEST SLOPE WATER DISTRICT | ||
| Who Was Contacted and Phone: | Jerry Arnold (503) 272-2777 | ||
| Contact Date: | 11/08/2011 | ||
| Contacted By: | SALIS, KARI (DWP) | ||
| Contact Method/Location: | Office | ||
| Assistance Type: | WATER QUALITY ALERT RESPONSE | ||
| Reasons: | Coliform N/A |
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| Details: | SUMMARY: TC+ MCL DETAILS: System had 5 TC+ in October. They have asked us if they can do a limited public notice in the affected area. I have decided that we can allow a limited public notice in this instance. due to the fact that you have 2 other samples taken on the same day as the initial positive, 10/12, this indicates that the problem is likely isolated to the pressure zone 3. Please remember that the standard is to notify the entire system of an MCL violation. The chlorine residual from the other locations was also low, at 0.2 ppm. you, as the water purveyor, will need to answer the question of how you can be sure that the contamination didnt come from upstream. if you cannot adequately answer this question, a notice should be sent to all customers of the water system. ACTION NEEDED: we also note that the system only has 3 routine coliform sample sites. We advise systems to have 3 times the number of routine samples you are required to collect each month. this would enable us to more adequately determine water quality in all parts of the distribution system. Gregg will discuss with system. | ||
| Associated Alerts: | COLI9871 - 10/31/2011 - COLIFORM (TCR) |
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