WAC 246-290-632
Treatment technique violations. (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 CFR 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.]