Alaska Administrative Code › Title 18 - Environmental Conservation › Chapter 80 - Drinking Water › Article 6 - Surface Water Treatment › 18 AAC 80.660 - Monitoring requirements for systems avoiding filtration

Current through May 31, 2024
The requirements of
				  40 C.F.R.
				  141.74(b), adopted by
				  reference in
				  18 AAC 80.010(a),
				  and of 18 AAC 80.655 apply to a community
				  water system, non-transient non-community water system, or transient
				  non-community water system that uses a surface water source or a GWUDISW
				  source, and that does not provide filtration treatment. In addition,
(1) the department will require that a system
				that uses a GWUDISW source, that does not provide filtration treatment, and
				that is seeking to avoid filtration under
				40 C.F.R.
				141.71, adopted by reference under
				18 AAC 80.010(a),
				begin monitoring in accordance with
				40 C.F.R.
				141.74(b) six months after
				the department determines that the groundwater source is under the direct
				influence of surface water;
(2) the
				department will allow the system to substitute continuous turbidity monitoring
				for grab sample monitoring if the operator validates the continuous measurement
				for accuracy on a regular basis using a method approved under
				18 AAC 80.655(c);
(3) for
				40 C.F.R.
				141.74(b)(3)(v) for a system
				using a disinfectant other than chlorine, the owner shall demonstrate to the
				department, through standard sanitary engineering practices and principles,
				that CT
99.9
values other than those specified in
				Tables 2.1 and 3.1 in 40
				C.F.R. 141.74(b)(3) or other
				operational parameters are adequate to demonstrate that the system is achieving
				the minimum inactivation rates required by
				40 C.F.R.
				141.72(a)(1), adopted by
				reference in
				18 AAC 80.010(a);
(4) the requirements in
				40 C.F.R.
				141.74(b)(1), for one fecal
				or total coliform density measurement every day the system serves water to the
				public and the turbidity of the source water exceeds one NTU, apply unless the
				department finds that the owner or operator, for logistical reasons outside the
				owner's or operator's control, cannot have the sample analyzed within 30 hours
				after collection, or within 48 hours after collection for an area described in
				18 AAC 80.350(a);
				if the logistical problem is likely to persist, the department will grant a
				standing waiver that will remain in effect until the department rescinds or
				revises it; the department will keep a copy of the waiver in the department's
				file for the public water system until one year after the waiver expires or is
				rescinded or revised; the department will not grant a waiver from the
				requirement of this section because of a lack of sampling containers; for
				purposes of this paragraph, the department will consider any of the following
				situations to be logistical reasons outside the owner's or operator's control:
(A) the certified laboratories available to
				the system cannot analyze the samples within 30 hours after collection, or
				within 48 hours after collection for an area described in
				18 AAC 80.350(a),
				because of limited days of operation or limited laboratory capacity;
(B) weather conditions make it impossible to
				ship the samples to the laboratory for analysis within 30 hours after
				collection, or within 48 hours after collection for an area described in
				18 AAC 80.350(a);
(C) shipping services from the system are
				limited so that samples cannot be collected, shipped, and analyzed within 30
				hours, or within 48 hours for an area described in
				18 AAC 80.350(a);
(D) other unusual or unpredictable
				situations, such as a landslide closing the road or knocking out a transmission
				line, make it impossible for the owner or operator to meet the 30-hour or
				48-hour requirement;