Current through Register Vol. 24-18, September 15, 2024
(1) A treatment technique violation shall be
considered a violation of a primary drinking water standard and in the case of
an unfiltered system, may result in the purveyor of an unfiltered system being
required to install filtration.
(2)
A treatment technique violation occurs when a system using a surface or GWI
source is identified by the department as the source of a waterborne disease
outbreak or any of the following occur as applicable:
(a) The purveyor providing filtration
delivers unfiltered water or fails to meet one or more of the following
requirements:
(i) Filtration treatment in
accordance with WAC
246-290-660; or
(ii) Disinfection treatment in accordance
with WAC 246-290-662.
(b) The purveyor required to install
filtration:
(i) Fails to meet the interim
disinfection requirements under WAC
246-290-672 or as otherwise
directed by the department; or
(ii)
Fails to install filtration or develop an alternate source by the applicable
time lines specified in WAC
246-290-670.
(c) The purveyor of an unfiltered surface
water, or GWI source, meeting the criteria to remain unfiltered:
(i) Delivers water with a turbidity level
exceeding 5.0 NTU measured at a point immediately prior to the point of primary
disinfection; or
(ii) Fails to meet
one or more of the disinfection requirements under WAC
246-290-692 after the dates
specified in WAC
246-290-686.
(d) The purveyor of an unfiltered source
meeting the criteria to provide a limited alternative to filtration:
(i) Delivers water with a turbidity level
exceeding 5.0 NTU measured at a point immediately prior to the point of primary
disinfection; or
(ii) Fails to meet
one or more of the disinfection requirements under WAC
246-290-692.
(e) A purveyor supplies water from an
unfiltered source that has not been previously approved by the
department.
(f) A purveyor of a
department approved unfiltered source that fails to meet the on-going criteria
to remain unfiltered:
(i) Delivers water with
a turbidity level exceeding 5.0 NTU measured at a point immediately prior to
the point of primary disinfection; or
(ii) Fails to meet one or more of the
disinfection requirements under WAC
246-290-692.
(g) A purveyor of a department approved
unfiltered source that has failed to meet the criteria to provide a limited
alternative to filtration:
(i) Delivers water
with a turbidity level exceeding 5.0 NTU measured at a point immediately prior
to the point of primary disinfection; or
(ii) Fails to meet one or more of the
disinfection requirements under WAC
246-290-692.
(h) A purveyor fails to meet the enhanced
Cryptosporidium treatment requirements under
40 C.F.R.
141.711 or
141.712.
Statutory Authority: RCW 70.119A.180 and 43.20.050.
08-03-061, § 246-290-632, filed 1/14/08, effective 2/14/08. Statutory
Authority: RCW 43.02.050 [43.20.050]. 99-07-021, § 246-290-632, filed
3/9/99, effective 4/9/99. Statutory Authority:
RCW
43.20.050. 94-14-001, § 246-290-632,
filed 6/22/94, effective 7/23/94; 93-08-011 (Order 352B), § 246-290-632,
filed 3/25/93, effective 4/25/93.
