OHA Drinking Water Services
Contact Report Details |
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PWS ID: | OR41 00205 | ||
PWS Name: | COOS BAY NORTH BEND WTR BRD | ||
Who Was Contacted and Phone: | Robert Buras (541) 267-3128 | ||
Contact Date: | 04/07/2011 | ||
Contacted By: | MACPHERSON, JAMES (REGION 2) | ||
Contact Method/Location: | Office | ||
Assistance Type: | OTHER REGULATORY - REGULATORY ASSISTANCE | ||
Reasons: | SWTR None |
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Details: | SUMMARY: Peak Hourly Flow DETAILS: Calculation of peak hourly flow can be by using an average of the maximum flows over the hour of highest total flow. (Data resolution for flow rate is much less than one minute at CBNB.) The lowest chlorine residual during that hour of peak flow may be used to calculate CT, except where unusually low chlorine residuals are observed close in time to, but outside, the peak hourly flow. Professional judgement is required to decide if a chlorine residual occurring outside the peak hour of flow should be used to calculate CT. ACTION NEEDED: None |