WAC 246-290-674
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 CFR
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) and70.119A.080
. 03-08-037, § 246-290-674, filed 3/27/03,
effective 4/27/03. Statutory Authority: RCW 43.02.050
[43.20.050]. 99-07-021, § 246-290-674, filed 3/9/99,
effective 4/9/99. Statutory Authority: RCW 43.20.050. 93-08-011 (Order 352B), § 246-290-674, filed 3/25/93,
effective 4/25/93.]