246-290-672  <<  246-290-674 >>   246-290-676

Interim monitoring and reporting.

(1) Monitoring. Unless directed otherwise by the department, the purveyor of an existing unfiltered system installing filtration shall:
(a) Conduct interim monitoring in accordance with 40 C.F.R. 141.22;
(b) Measure the residual disinfectant concentration within the distribution system at the same time and location that a routine or repeat sample is collected in accordance with WAC 246-290-300(3) or 246-290-320(2); and
(c) Measure residual disinfection concentrations at entry to the distribution system on a daily basis, or as directed by the department.
(2) Reporting.
(a) The purveyor installing filtration shall report to the department as soon as possible, but no later than twenty-four hours after the purveyor learns of any of the following events:
(i) A waterborne disease outbreak potentially attributable to the water system occurs;
(ii) The turbidity of water delivered to the public exceeds 5.0 NTU; or
(iii) The interim disinfection requirements under WAC 246-290-672 are not met.
(b) The purveyor shall report results of monitoring to the department. Monthly report forms shall be submitted within ten days after the end of each month the system served water to the public.
(c) The purveyor shall report, at a minimum, all the information requested by the department using a department-approved form or format including:
(i) Water quality information, including results of monitoring in accordance with WAC 246-290-300 and 246-290-320;
(ii) Disinfection monitoring information;
(iii) A summary of water quality complaints received from consumers served by the system.
[Statutory Authority: RCW 43.20.050 (2) and (3) and 70.119A.080. WSR 03-08-037, § 246-290-674, filed 3/27/03, effective 4/27/03. Statutory Authority: RCW 43.02.050 [43.20.050]. WSR 99-07-021, § 246-290-674, filed 3/9/99, effective 4/9/99. Statutory Authority: RCW 43.20.050. WSR 93-08-011 (Order 352B), § 246-290-674, filed 3/25/93, effective 4/25/93.]
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