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2. maintain a detectible chlorine residual within the distribution system in at least 95 <br />percent of the measurements taken each calendar month. Unless you have specially - <br />designed testing equipment such as continuous chlorine analyzers, detectible means a <br />minimum residual of 0.2 mg /L. <br />3. report the results of that monitoring to the Department of Health on a monthly basis. <br />Enclosed is a master copy of the current report form. Please make copies and start using it right <br />away. The monthly report is due by the tenth day of the following month. <br />In addition to the monitoring and reporting requirements, there are ongoing requirements for <br />routine verification (every 5 days) of continuous chlorine analyzers. <br />If you have questions or need technical assistance, please contact me at (253) 395 -6762 or by <br />email at Jolyn.Leslie@doh.wa.gov. <br />Sincerely, <br />Jolyn Leslie, P.E. <br />Regional Engineer <br />Northwest Drinking Water Operations <br />Enclosure <br />cc: Public Health — Seattle & King County <br />Brietta Carter, PE — DOH <br />WAC References <br />Maintaining a residual — WAC 246 - 290 - 692(5) <br />Monitoring — WAC 246 - 290 - 694(8); WAC 246 - 290- 300(2)(b) <br />Reporting — WAC 246 - 290 - 696(4) <br />Verification of continuous analyzers — WAC 246 - 290 - 638(5) <br />C � r Y 0 F 1C,,W!I[ �\ <br />r ER S 10F' <br />.. <br />