Current through Register Vol. 24-18, September 15, 2024
(1) The purveyor shall notify the department,
as soon as possible, but no later than twenty-four hours after the purveyor
learns of the following events:
(a) A
waterborne disease outbreak potentially attributable to the water system
occurs;
(b) The turbidity of the
combined filter effluent exceeds 5.0 NTU at any time for any system using slow
sand, diatomaceous earth, or for any system serving less than ten thousand
people and using conventional, direct, or in-line filtration;
(c) The turbidity of the combined filter
effluent:
(i) Exceeds 1.0 NTU at any time for
a system serving at least ten thousand people and using conventional, direct,
or in-line filtration;
(ii)
Beginning January 14, 2005, the turbidity of the combined filter effluent
exceeds 1.0 NTU at any time for a system serving less than ten thousand people
using conventional, direct, or in-line filtration;
(d) The turbidity of the combined filter
effluent exceeds the maximum specified level for an alternative filtration
technology approved by the department;
(e) The residual disinfection concentration
falls below 0.2 mg/L at the entry point to the distribution system. The
purveyor shall also report whether the residual was restored to 0.2 mg/L or
more within four hours; or
(f) An
event occurs that may affect the ability of the water treatment facility to
produce drinking water that complies with this chapter including, but not
limited to:
(i) Spills of hazardous materials
in the watershed; and
(ii)
Treatment process failures.
(2) The purveyor shall report results of
monitoring conducted in accordance with WAC
246-290-664 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.
(3) The purveyor shall report, at a minimum,
all the information requested by the department using a department-approved
form or format including:
(a) Water treatment
facility operations information;
(b) Turbidity monitoring results, including:
(i) Source monitoring, if required under WAC
246-290-664(2);
(ii) Combined filter effluent. Continuous
measurements shall be reported at equal intervals, at least every four hours,
in accordance with a department-approved schedule;
(iii) Individual filter turbidity monitoring
results. Systems serving at least ten thousand people and using conventional,
direct, or in-line filtration shall report and take follow-up action as
prescribed in 40 C.F.R.
141.175(b). Beginning
January 14, 2005, systems serving less than ten thousand people shall report
and take follow-up action as prescribed by
40 C.F.R.
141.563 and
141.570. Required follow-up action
may include development of a filter profile, a filter self-assessment, as
described in 40 C.F.R.
141.175(b)(3) and
141.563(b), or
the completion of a comprehensive performance evaluation (CPE).
(c) Disinfection monitoring
information including:
(i) Level of
inactivation achieved;
(ii)
Residual disinfectant concentrations entering the distribution system;
and
(iii) Residual disinfectant
concentrations within the distribution system.
(d) Total level of removal and inactivation;
and
(e) A summary of water quality
complaints received from consumers served by the water system.
(4) A person certified under
chapter 246-292 WAC shall complete and sign the monthly report forms required
in this section.
Statutory Authority: RCW 43.20.050 and 70.119A.080.
04-04-056, § 246-290-666, filed 1/30/04, effective 3/1/04. Statutory
Authority:
RCW
43.20.050(2) and (3) and
70.119A.080. 03-08-037, §
246-290-666, filed 3/27/03, effective 4/27/03. Statutory Authority: RCW
43.02.050 [43.20.050]. 99-07-021, § 246-290-666, filed 3/9/99, effective
4/9/99. Statutory Authority: RCW 43.20.050. 94-14-001, § 246-290-666,
filed 6/22/94, effective 7/23/94; 93-08-011 (Order 352B), § 246-290-666,
filed 3/25/93, effective 4/25/93.
