reglab/statecodes huggingface dataset:
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 5 - WATER SYSTEM OPERATIONS › Section 246-290-485 - Recordkeeping and reporting for groundwater systems

Current through Register Vol. 24-14, July 15, 2024
(1) Records. In addition to the requirements
				  of WAC 246-290-480, the purveyor shall
				  keep the following records:
(a) Records of
				  corrective actions. For each action, records shall be kept for at least ten
				  years.
(b) Records of public
				  notification as required under WAC
				  246-290-71005(4) and
				  (5) and shall be kept for at least three
				  years.
(c) Records of invalidation
				  of groundwater source samples under WAC
				  246-290-320(2)(g)(vii),
				  and shall be kept for at least five years.
(d) For consecutive systems, records of
				  notification to the wholesale system of total-coliform positive routine samples
				  that are not invalidated under WAC
				  246-290-320(2)(d),
				  and shall be kept for at least five years.
(e) For all systems that are required to
				  perform compliance monitoring under WAC
				  246-290-453:
(i) Records of department-specified minimum
				  disinfectant residual, and shall be kept for at least ten years.
(ii) Records of the lowest residual
				  disinfectant concentration, and the date and duration of any failure to
				  maintain the department-prescribed minimum residual disinfectant concentration
				  for a period of more than four hours, and shall be kept for at least five
				  years.
(iii) Records of
				  department-specified compliance requirements for membrane filtration and of
				  department-specified parameters for department-approved alternative treatment,
				  and shall be kept for at least five years.
(iv) Records of the date and duration of any
				  failure to meet the membrane operating, membrane integrity, or alternative
				  treatment operating requirements for more than fours hours, and shall be kept
				  for at least five years.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 5 - WATER SYSTEM OPERATIONS › Section 246-290-490 - Cross-connection control

Current through Register Vol. 24-14, July 15, 2024
(1) Applicability,
				  purpose, and responsibility.
(a) All
				  community water systems shall comply with the cross-connection control
				  requirements specified in this section.
(b) All noncommunity water systems shall
				  apply the principles and provisions of this section, including subsection
				  (4)(b) of this section, as applicable to protect the public water system from
				  contamination via cross-connections. Noncommunity systems that comply with
				  subsection (4)(b) of this section and the provisions of WAC 51-56-0600 of the
				  UPC (which addresses the installation of backflow preventers at points of water
				  use within the potable water system) shall be considered in compliance with the
				  requirements of this section.
(c)
				  The purpose of the purveyor's cross-connection control program shall be to
				  protect the public water system, as defined in WAC
				  246-290-010, from contamination
				  via cross-connections.
(d) The
				  purveyor's responsibility for cross-connection control shall begin at the water
				  supply source, include all the public water treatment, storage, and
				  distribution facilities, and end at the point of delivery to the consumer's
				  water system, which begins at the downstream end of the service connection or
				  water meter located on the public right of way or utility-held
				  easement.
(e) Under this section,
				  purveyors are not responsible for eliminating or controlling cross-connections
				  within the consumer's water system. Under chapter 19.27 RCW, the responsibility
				  for cross-connection control within the consumer's water system, i.e., within
				  the property lines of the consumer's premises, lies with the authority having
				  jurisdiction.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 5 - WATER SYSTEM OPERATIONS › Section 246-290-496 - Metering requirements

Current through Register Vol. 24-14, July 15, 2024
(1) Production:
(a) The volume of water produced or purchased
				  must be measured using a source meter or other meter installed upstream of the
				  distribution system.
(b) The
				  requirements of this section do not alter any source metering regulations
				  adopted by either the department of health or the department of
				  ecology.
(c) The requirements of
				  this section do not apply to volumes of water delivered to a public water
				  system through an emergency intertie.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 5 - WATER SYSTEM OPERATIONS › Section 246-290-500 - Severability

Current through Register Vol. 24-14, July 15, 2024
If any provision of this chapter or its application to any
					 person or circumstances is held invalid, the remainder of this chapter, or the
					 application of the provision to other persons or circumstances, shall not be
					 affected.
Statutory Authority: RCW 43.20.050. 91-02-051 (Order
						124B), recodified as § 246-290-500, filed 12/27/90, effective 1/31/91.
						Statutory Authority: RCW 34.04.045. 88-05-057 (Order 307), § 248-54-291,
						filed 2/17/88.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-601 - Purpose of surface water treatment

Current through Register Vol. 24-14, July 15, 2024
(1)
					 Part 6 of chapter 246-290 WAC establishes filtration and disinfection as
					 treatment technique requirements for water systems using surface or GWI
					 sources. The Part 6 treatment technique requirements are established in lieu of
					 maximum contaminant levels (MCLs) for the following contaminants:
(a)
Giardia
					 lamblia
;
(b)
					 Viruses;
(c) Heterotrophic plate
					 count bacteria;
(d)
Legionella
;
(e)
Cryptosporidium
; and
(f) Turbidity.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-620 - Applicability of surface water treatment requirements

Current through Register Vol. 24-14, July 15, 2024
(1) The requirements of Part 6 of this
					 chapter apply to water systems that:
(a) Use
					 surface sources or groundwater sources under the direct influence of surface
					 water (GWI); or
(b) Purchase
					 surface or GWI water from an approved public water system or other entity
					 acceptable to the department.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-630 - General requirements

Current through Register Vol. 24-14, July 15, 2024
(1) The
					 purveyor shall provide treatment for surface and GWI sources consistent with
					 the treatment technique requirements specified in Part 6 of this
					 chapter.
(2) The purveyor shall
					 install and properly operate water treatment processes to achieve at least:
(a) 99.9 percent (3-log) removal and/or
					 inactivation of
Giardia lamblia
cysts;
(b) 99.99 percent (4-log) removal and/or
					 inactivation of viruses; and
(c) 99
					 percent (2-log) removal of
Cryptosporidium
oocysts if required
					 to filter.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-632 - Treatment technique violations

Current through Register Vol. 24-14, July 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.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-634 - Follow-up to treatment technique violations

Current through Register Vol. 24-14, July 15, 2024
When a treatment technique violation occurs, the
						purveyor:
(1) Shall report to the
					 department in accordance with:
(a) WAC
					 246-290-666 for purveyors
					 providing filtration or required to filter;
(b) WAC
					 246-290-674 for purveyors
					 installing filtration; or
(c) WAC
					 246-290-696 for purveyors meeting
					 the criteria to remain unfiltered or providing a limited alternative to
					 filtration;
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-636 - Determination of disinfectant contact time (T)

Current through Register Vol. 24-14, July 15, 2024
(1) The purveyor shall calculate T at peak
					 hourly flow for each surface or GWI source.
(2) For pipelines, the purveyor shall
					 calculate T by dividing the internal volume of the pipe by the peak hourly flow
					 rate through that pipe.
(3) For all
					 other system components used for inactivation of
Giardia
					 lamblia
cysts, viruses, and other microorganisms of public health
					 concern, the purveyor shall use tracer studies or empirical methods to
					 determine T.
(4) The purveyor shall
					 use the T10 value determined by tracer studies or other methods acceptable to
					 the department as T in all CT calculations.
(5) Tracer studies.
(a) The purveyor shall conduct field tracer
					 studies on all system components with configurations (geometry and/or baffling)
					 for which analogous contact times are not documented.
(b) Before conducting tracer studies, the
					 purveyor shall obtain the department's approval of a tracer study plan. The
					 plan shall identify at a minimum:
(i) How the
					 purveyor will conduct the study;
(ii) The tracer material to be
					 used;
(iii) Flow rates to be used;
					 and
(iv) The names, titles, and
					 qualifications of the persons conducting the study.
(c) A professional engineer registered in the
					 state of Washington shall direct the conduct of all tracer studies.
(d) Tracer studies shall be conducted in
					 accordance with good engineering practices using methods acceptable to the
					 department such as those described in department guidance on surface water
					 treatment.
(e) The department may
					 require the purveyor to conduct additional tracer studies when:
(i) Modifications impacting flow distribution
					 or T are made; or
(ii) Increases in
					 flow exceed the conditions of the previous tracer studies.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-638 - Analytical requirements

Current through Register Vol. 24-14, July 15, 2024
(1) The
					 purveyor shall ensure that only qualified persons conduct measurements for pH,
					 temperature, turbidity, and residual disinfectant concentrations. In this
					 section, qualified means:
(a) A person
					 certified under chapter 246-292 WAC;
(b) An analyst, with experience conducting
					 these measurements, from the state public health laboratory or another
					 laboratory certified by the department;
(c) A state or local health jurisdiction
					 professional experienced in conducting these measurements; or
(d) For the purpose of monitoring
					 distribution system residual disinfectant concentration only, a person
					 designated by and under the direct supervision of a waterworks operator
					 certified under chapter 246-292 WAC.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-639 - SWTR records

Current through Register Vol. 24-14, July 15, 2024
(1) Purveyors using
					 surface or GWI sources shall maintain accurate and complete operations
					 records.
(2) Operations records
					 shall include, but not be limited to, the following as applicable:
(a) Results of all monitoring conducted under
					 Part 6 of chapter 246-290 WAC;
(b)
					 Quantity of water produced, plant flow rates, and hours of operation;
(c) Types and quantities of chemicals
					 used;
(d) Dates and information
					 pertaining to filter and/or disinfection system maintenance;
(e) Dates and results of filter and/or
					 disinfection system inspections including records of filtration and backwash
					 rates;
(f) Dates and descriptions
					 of major equipment and/or treatment process failures and corrective actions
					 taken; and
(g) The information and
					 data specified under 40
					 C.F.R. 141.721 related to enhanced treatment
					 for
Cryptosporidium
.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart A - Introduction and General Requirements › Section 246-290-640 - Determination of GWI sources

Current through Register Vol. 24-14, July 15, 2024
(1) Until
					 the department has made a source GWI determination, the purveyor shall monitor
					 in accordance with the requirements for groundwater sources in WAC
					 246-290-300 or as directed by the
					 department and provide follow-up in accordance with WAC
					 246-290-320.
(2) The purveyor, after being notified by the
					 department that one or more of the system sources have been classified as
					 potential GWI, may elect to seek approval from the department to modify the
					 potential GWI source to mitigate surface water influences prior to compliance
					 with subsection (3) of this section, and if so, shall:
(a) Complete a project report, for
					 departmental approval, that describes the proposed source-related
					 modifications, including the schedule for their completion and an explanation
					 of why the source should be reclassified upon completion of the source
					 modifications; and
(b) Demonstrate
					 compliance, if directed by the department, with the requirements of subsection
					 (3) of this section upon completion of the source-related
					 modifications.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-650 - Compliance requirements for filtered systems

Current through Register Vol. 24-14, July 15, 2024
(1) In addition to the requirements of Parts
					 1 through 5 of chapter 246-290 WAC, Subpart B of Part 6 of chapter 246-290 WAC
					 applies to purveyors of systems using surface or GWI sources and providing
					 filtration, including:
(a) Systems with water
					 treatment facilities that produced water served to the public before January 1,
					 1991;
(b) Unfiltered systems
					 installing filtration, once the new water treatment facilities are on-line;
					 and
(c) New systems using surface
					 or GWI sources. For the purpose of the Part 6 chapter 246-290 WAC requirements,
					 new systems are defined as systems first serving water to the public after
					 December 31, 1990.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-652 - Filtration technology and design criteria for existing filtered systems

Current through Register Vol. 24-14, July 15, 2024
(1) The purveyor
					 shall treat all surface and GWI sources using one of the following filtration
					 technologies unless another technology is acceptable to the department:
(a) Conventional;
(b) Direct;
(c) Diatomaceous earth; or
(d) Slow sand.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-654 - Treatment criteria for filtered systems

Current through Register Vol. 24-14, July 15, 2024
(1) The purveyor shall operate filters so
					 that maximum flow rates do not exceed those specified in Table 14 of this
					 section. The purveyor may operate filters at higher flow rates, if the purveyor
					 demonstrates to the department's satisfaction that filtration at the higher
					 rate consistently achieves at least 99 percent (2-log) removal of
Giardia lamblia
cysts and 99 percent (2-log) removal of
Cryptosporidium
oocysts and meets the turbidity performance
					 requirements of Table 15.
Table 14
FILTRATION OPERATION CRITERIA
FILTRATION TECHNOLOGY/MEDIA
MAXIMUM FILTRATION RATE
(gpm/ft2)
Conventional, Direct and In-Line
Gravity Filters with Single Media
3
Gravity Filters with Deep Bed, Dual or Mixed
								  Media
6
Pressure Filters with Single Media
2
Pressure Filters with Deep Bed, Dual or Mixed
								  Media
3
Slow Sand
0.1
Diatomaceous Earth
1.0
(2) The purveyor using conventional, direct
					 or in-line filtration shall ensure that effective coagulation is in use at all
					 times the water treatment facility produces water served to the
					 public.
(3) The purveyor using
					 conventional, direct, or in-line filtration shall demonstrate treatment
					 effectiveness for
Giardia lamblia
cyst and
Cryptosporidium
oocyst removal by one of the following
					 methods:
(a) Turbidity reduction method.
(i) The purveyor shall make source and
					 filtered water turbidity measurements in accordance with WAC
					 246-290-664(2) and
					 (3) respectively.
(ii) The purveyor shall achieve:
(A) The turbidity performance requirements
					 specified in WAC
					 246-290-660(1) 
					 and at least an eighty percent reduction in source turbidity based on an
					 average of the daily turbidity reductions measured in a calendar month;
					 or
(B) An average daily filtered
					 water turbidity less than or equal to 0.1 NTU.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-660 - Filtration

Current through Register Vol. 24-14, July 15, 2024
(1) Turbidity
					 performance requirements.
(a) The turbidity
					 level of representative filtered water samples must:
(i) Comply with the performance standards in
					 Table 15 of this section;
(ii)
					 Never exceed 5.0 NTU for any system using slow sand, diatomaceous
					 earth;
(iii) Never exceed 1.0 NTU
					 for any system using conventional, direct, or in-line filtration; and
(iv) Never exceed the maximum allowable
					 turbidity determined by the department on a case-by-case basis for any system
					 using an alternative filtration technology approved under WAC
					 246-290-676(2)(b).
Table 15
TURBIDITY PERFORMANCE STANDARDS
Filtration Technology
Filtered water turbidity (in NTUs) shall be less
								  than or equal to this value in at least 95% of the measurements made each
								  calendar month
Conventional, Direct and Inline
0.30
Slow Sand
1.0
Diatomaceous Earth
1.0
Alternative Technology
As determined by the department through
								  case-by-case approval of technology, under WAC
								  246-290-676(2)(b).
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-662 - Disinfection for filtered systems

Current through Register Vol. 24-14, July 15, 2024
(1)
					 General requirements.
(a) The purveyor shall
					 provide continuous disinfection to ensure that filtration and disinfection
					 together achieve, at all times the system serves water to the public, at least
					 the following:
(i) 99.9 percent (3-log)
					 inactivation and removal of
Giar-dia lamblia
cysts;
					 and
(ii) 99.99 percent (4-log)
					 inactivation and/or removal of viruses.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-664 - Monitoring for filtered systems

Current through Register Vol. 24-14, July 15, 2024
(1)
					 Source coliform monitoring.
(a) The purveyor
					 shall ensure that source water samples of each surface or GWI source are:
(i) Collected before the first point of
					 disinfectant application and before coagulant chemical addition; and
(ii) Analyzed for fecal coliform density in
					 accordance with methods acceptable to the department.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-666 - Reporting for filtered systems

Current through Register Vol. 24-14, July 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.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart B - Requirements for Filtered Systems › Section 246-290-668 - Watershed control

Current through Register Vol. 24-14, July 15, 2024
(1) The purveyor
					 shall, to the extent possible, exercise surveillance over conditions and
					 activities in the watershed affecting source water quality. The purveyor shall
					 develop and implement a department-approved watershed control
					 program.
(2) The purveyor shall
					 include a current evaluation of the watershed as part of the watershed control
					 program within the water system plan under WAC
					 246-290-100 or small water system
					 management program under WAC
					 246-290-105, whichever is
					 applicable.
(3) The watershed
					 evaluation must include a description of:
(a)
					 Conditions/activities in the watershed that are adversely affecting source
					 water quality;
(b) Changes in the
					 watershed that could adversely affect source water quality that have occurred
					 since the last watershed evaluation;
(c) Sample results from the monitoring
					 program the purveyor uses to assess the adequacy of watershed protection ;
					 and
(d) Recommendations for
					 improved watershed control.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart C - Requirements for Systems Installing Filtration Facilities › Section 246-290-670 - Compliance requirements for existing unfiltered systems installing filtration

Current through Register Vol. 24-14, July 15, 2024
(1) The
					 purveyor of an existing unfiltered system shall:
(a) Install filtration within eighteen months
					 after department notification; and
(b) Be subject to the interim compliance
					 requirements as determined by the department and in conformance with
					 40 C.F.R.
					 141.13 and WAC
					 246-290-632.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart C - Requirements for Systems Installing Filtration Facilities › Section 246-290-672 - Interim treatment requirements

Current through Register Vol. 24-14, July 15, 2024
(1)
					 Purveyors of existing unfiltered systems installing filtration shall provide
					 interim disinfection treatment to:
(a) Ensure
					 compliance with the monthly coliform MCL under WAC
					 246-290-310;
(b) Achieve inactivation levels of
Giardia lamblia
cysts on a daily basis each month the system
					 serves water to the public as directed by the department; and
(c) Maintain a detectable residual
					 disinfectant concentration in the distribution system, measured as total
					 chlorine, free chlorine, or combined chlorine in 95 percent or more of the
					 samples taken each calendar month. The department may approve a written request
					 to use a lower value. At a minimum, the request to use a lower value must
					 identify the instrument used to measure the residual disinfectant concentration
					 and include the manufacturer's documentation on the instrument's accuracy to
					 measure the lower value.
(d) Water
					 in the distribution system with an HPC level less than or equal to 500
					 organisms/ml is considered to have a detectable residual disinfectant
					 concentration for the purposes of compliance with this subsection.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart C - Requirements for Systems Installing Filtration Facilities › Section 246-290-674 - Interim monitoring and reporting

Current through Register Vol. 24-14, July 15, 2024
(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 C.F.R.
					 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.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart C - Requirements for Systems Installing Filtration Facilities › Section 246-290-676 - Filtration technology and design criteria

Current through Register Vol. 24-14, July 15, 2024
(1) General.
(a) The purveyor proposing to construct new
					 water treatment facilities or to make additions to existing water treatment
					 facilities for surface and GWI sources shall ensure that the facilities comply
					 with the treatment, design, and reliability requirements of Part 6 of chapter
					 246-290 WAC.
(b) The purveyor shall
					 submit an engineering report to the department describing how the treatment
					 facilities will be designed to comply with the requirements specified in
					 Sub-parts A, B, and C of Part 6 of chapter 246-290 WAC.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart C - Requirements for Systems Installing Filtration Facilities › Section 246-290-678 - Reliability for filtered systems

Current through Register Vol. 24-14, July 15, 2024
(1)
					 The purveyor shall ensure that reliability features are included in all water
					 treatment facilities used to treat surface or GWI sources.
(2) Reliability features shall include but
					 not be limited to:
(a) Alarm devices to
					 provide warning of treatment process failures including coagulation,
					 filtration, and disinfection. Alarm devices shall warn individuals responsible
					 for taking corrective action and/or provide for automatic plant shutdown until
					 corrective action can be taken;
(b)
					 Standby replacement equipment available to assure continuous operation and
					 control of coagulation, clarification, filtration and disinfection
					 processes;
(c) Multiple filter
					 units that provide redundant capacity when filters are out of service for
					 backwash or maintenance, except where waived based on engineering justification
					 acceptable to the department.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart D - Requirements for Other Unfiltered Systems › Section 246-290-686 - Compliance requirements for unfiltered systems

Current through Register Vol. 24-14, July 15, 2024
(1) The purveyor using an unfiltered surface
					 or GWI source shall comply with:
(a) Subparts
					 A and D of Part 6 of chapter 246-290 WAC; and
(b) All other applicable sections of this
					 chapter.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart D - Requirements for Other Unfiltered Systems › Section 246-290-690 - Criteria to remain unfiltered

Current through Register Vol. 24-14, July 15, 2024
(1)
					 For a system not using the "limited alternative to filtration" option to remain
					 unfiltered, the purveyor using a surface water or GWI source shall meet the
					 source water quality and site-specific conditions under this section, as
					 demonstrated through monitoring conducted in accordance with WAC
					 246-290-694.
(2) Source water quality conditions necessary
					 to remain unfiltered.
(a) Coliform limits.
(i) The purveyor shall ensure that
					 representative source water samples taken before the first point of
					 disinfection have a fecal coliform density less than or equal to 20/100 ml in
					 ninety percent or more of all samples taken during the six previous calendar
					 months the system served water to the public. Samples collected on days when
					 source water turbidity exceeds 1.0 NTU shall be included when determining
					 compliance with this requirement.
(ii) The purveyor shall submit a written
					 report to the department if no source fecal coliform data has been submitted
					 for days when source turbidity exceeded 1.0 NTU. The report shall document why
					 sample results are not available and shall be submitted with the routine
					 monitoring reports for the month in which the sample results are not
					 available.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart D - Requirements for Other Unfiltered Systems › Section 246-290-691 - Criteria for unfiltered systems with a "limited alternative to filtration" to remain unfiltered

Current through Register Vol. 24-14, July 15, 2024
(1) For a
					 system providing a limited alternative to filtration, the purveyor using a
					 surface water or GWI source shall meet the source quality and site-specific
					 conditions under this section.
(2)
					 Source water turbidity requirements.
(a) The
					 purveyor shall ensure that the turbidity level in representative source water
					 samples taken before primary disinfection does not exceed 5.0 NTU.
(b) A system with more than two turbidity
					 events in the twelve previous calendar months the water was served to the
					 public or more than five turbidity events in the one hundred twenty previous
					 calendar months the water was served to the public shall expand the scope of
					 its next annual comprehensive report required under WAC
					 246-290-696(6) 
					 to include:
(i) A description of the
					 events;
(ii) A summary of previous
					 turbidity events;
(iii) A proposed
					 plan of corrective action; and
(iv)
					 A schedule for implementing the action plan.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart D - Requirements for Other Unfiltered Systems › Section 246-290-692 - Disinfection for unfiltered systems

Current through Register Vol. 24-14, July 15, 2024
(1)
					 General requirements.
(a) The purveyor
					 without a limited alternative to filtration shall:
(i) Provide continuous disinfection treatment
					 to ensure at least 99.9 percent (3-log) inactivation of
Giardia
					 lamblia
cysts and 99.99 percent (4-log) inactivation of viruses at all
					 times the system serves water to the public.
(ii) Failure to provide the required
					 inactivation level on more than one day in any calendar month shall be
					 considered a treatment technique violation.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart D - Requirements for Other Unfiltered Systems › Section 246-290-694 - Monitoring for unfiltered systems

Current through Register Vol. 24-14, July 15, 2024
(1)
					 Source coliform monitoring for systems without a limited alternative to
					 filtration.
(a) The purveyor shall ensure
					 that source water samples of each surface or GWI source are representative and:
(i) Collected before the first point of
					 disinfectant application; and
(ii)
					 Analyzed for fecal coliform density in accordance with methods acceptable to
					 the department.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 6 - SURFACE WATER TREATMENT › Subpart D - Requirements for Other Unfiltered Systems › Section 246-290-696 - Reporting for unfiltered systems

Current through Register Vol. 24-14, July 15, 2024
(1)
					 The purveyor 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:
(a) A waterborne disease outbreak
					 potentially attributable to the water system occurs;
(b) The turbidity of water delivered to the
					 public exceeds 5.0 NTU;
(c) The
					 minimum level of inactivation required by the department is not met;
(d) The residual disinfectant 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
(e) The
					 surface or GWI source is taken off-line due to an emergency.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71001 - Public notification

Current through Register Vol. 24-14, July 15, 2024
(1) The
					 purveyor shall notify the water system users and the owner or operator of any
					 consecutive water system served in accordance with
					 40 C.F.R.
					 141.201 through 208. Notice is to be provided
					 when the system violates a National Primary Drinking Water Regulation and when
					 any of the situations listed in Table 1 of
					 40 C.F.R.
					 141.201 occur, except for (a)(3)(ii). Public
					 notifications for violations and other situations are categorized into the
					 following Tiers:
(a) Tier 1 as described in
					 Table 1 of 40 C.F.R.
					 141.202(a);
(b) Tier 2 as described in Table 1 of
					 40 C.F.R.
					 141.203(a); or
(c) Tier 3 as described in Table 1 of
					 40 C.F.R.
					 141.204(a).
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71002 - Public notice content

Current through Register Vol. 24-14, July 15, 2024
(1) Public
					 notices required under WAC
					 246-290-71001(1)
					  must contain the elements and standard
					 language required under
					 40 C.F.R. 141.205(a),
					 (b), and (d) and be presented in accordance
					 with
					 40 C.F.R.
					 141.205(c), except that
					 notification of the availability of results required per
					 40 C.F.R.
					 141.40 and notification of an exceedance of
					 the secondary MCL for fluoride must be in accordance with WAC
					 246-290-71005.
(2) Public notices
					 required under WAC
					 246-290-71001(3)(a) and
					 (c) for the issuance of a departmental order
					 or category red operating permit must include:
(a) A clear, concise, and simple explanation
					 of the violation;
(b) Discussion of
					 potential adverse health effects and any segments of the population that may be
					 at higher risk;
(c) Mandatory
					 health effects information in accordance with WAC
					 246-290-71004(2);
(d) A list of steps the purveyor has taken or
					 is planning to take to remedy the situation;
(e) A list of steps the consumer should take,
					 including advice on seeking an alternative water supply if necessary;
(f) The purveyor's name and telephone number;
					 and
(g) When appropriate, notices
					 must be bilingual or multilingual.
Note:
The purveyor may provide additional information
									 to further explain the situation.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71003 - Public notification distribution

Current through Register Vol. 24-14, July 15, 2024
(1) Purveyors must provide public notice as
					 required under WAC
					 246-290-71001(1)
					 according to Tier designation generally described in
					 40 C.F.R.
					 141.201. The form, manner, timing and
					 frequency for each Tier of public notice, as defined in Table 2 of
					 40 C.F.R.
					 141.201 shall be in accordance with:
(a)
												40 C.F.R.
					 141.202 for Tier 1 public notice.
(b)
												40 C.F.R.
					 141.203 for Tier 2 public notice.
(c)
												40 C.F.R.
					 141.204 for Tier 3 public notice.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71004 - Public notification mandatory language

Current through Register Vol. 24-14, July 15, 2024
(1) Public notice required under WAC
					 246-290-71001(1)
					  must contain any specific health effects
					 language set forth in WAC 246-290-72012 in accordance with
					 40 C.F.R.
					 141.205(d)(1) and other
					 standard language in accordance with
					 40 C.F.R.
					 141.205(d)(2) and (3),
					 except that notification of the availability of results required per
					 40 C.F.R.
					 141.40 and notification of the exceedance of
					 the secondary MCL for fluoride must be in accordance with WAC
					 246-290-71005.
(2) The purveyor
					 shall provide specific mandatory language, contained in department guidance, in
					 its notification when the purveyor is issued a category red operating
					 permit.
Statutory Authority:
						  RCW
						  43.20.050(2) and (3) and
						  70.119A.080. 03-08-037, §
						  246-290-71004, filed 3/27/03, effective
						  4/27/03.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71005 - Special public notification requirements

Current through Register Vol. 24-14, July 15, 2024
(1) The purveyor of community or NTNC water
					 systems required to monitor under
					 40 C.F.R.
					 141.40 shall notify the water system users of
					 the availability of the results of monitoring for unregulated contaminants no
					 later than twelve months after the monitoring results are known. The form and
					 manner of the public notice to the water system users shall be in accordance
					 with 40 C.F.R.
					 141.204(c), (d)(1), and
					 (d)(3). The notice must also identify a person and provide the telephone number
					 to contact for information on the monitoring results.
(2) The purveyor of a community water system
					 that exceeds the fluoride secondary MCL of 2.0 mg/L but does not exceed the
					 fluoride primary MCL of 4.0 mg/L shall provide notice, in accordance with the
					 form, manner, timing, distribution, and content requirements of
					 40 C.F.R.
					 141.208.
(3) The purveyor of a water system using
					 surface water or GWI sources that repeatedly fails to monitor for
Cryptosporidium
or determine the bin classification or mean
Cryptosporidium
level, must notify the public under
					 40 C.F.R.
					 141.211.
(4) The purveyor of a community groundwater
					 system that receives notice from the department of a significant deficiency or
					 an
E. coli
positive groundwater source sample that is not
					 invalidated by the department, must notify the public under WAC
					 246-290-72013.
(5) The purveyor of a noncommunity
					 groundwater system with a significant deficiency that has not been corrected
					 within twelve months of being notified or earlier if directed must notify the
					 public under WAC
					 246-290-72013. The system must
					 continue to notify the public annually until the significant deficiency is
					 corrected. The information must include:
(a)
					 The nature of the significant deficiency and the date it was identified by the
					 department;
(b) A
					 department-approved plan and schedule for correcting the significant deficiency
					 including interim measures, progress to date, and which interim measures have
					 been completed;
(c) In communities
					 with a large proportion of non-English speaking consumers, the notice must
					 contain information in the appropriate language(s) regarding the importance of
					 the notice or contain a telephone number or address where the consumers may
					 contact the system to obtain a translated copy of the notice or assistance with
					 the appropriate language; and
(d)
					 If directed by the department, a system with significant deficiencies that have
					 been corrected must inform its customers of the significant deficiencies, how
					 the deficiencies were corrected, and the date(s) of correction under (a)
					 through (c) of this subsection.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71006 - Public notice for contaminants with a SAL and other unregulated contaminants

Current through Register Vol. 24-14, July 15, 2024
(1) The
					 purveyor shall provide public notice to the water system users when the
					 department determines that a contaminant exceeds a SAL listed in WAC
					 246-290-315, Table 9.
(2) The public notice must be in conformance
					 with the requirements under WAC 246-290-71001 through 246-290-71004 and based
					 upon the public notice tier designation of the contaminant or group of
					 contaminants in Table 17 of this section.
TABLE 17
PUBLIC NOTICE TIER DESIGNATION FOR CONTAMINANTS WITH A
						SAL
Contaminant or Group of Contaminants
Public Notice Tier
Bioaccumulative
PFOA
Tier 2
Yes
PFOS
Tier 2
Yes
PFHxS
Tier 2
Yes
PFNA
Tier 2
Yes
PFBS
Tier 2
Yes
(a) The
					 purveyor shall complete public notice for an initial exceedance of a Tier 1
					 designated SAL within twenty-four hours of confirmation, and for every
					 subsequent quarter in which analytical results exceed a SAL.
(b) The purveyor shall complete public
					 notification for an initial exceedance of a Tier 2 designated SAL as soon as
					 practical, but no less than within thirty days of exceeding the SAL per Table 9
					 in WAC 246-290-315, and every three
					 months thereafter as long as the results continue to exceed the SAL per Table 9
					 in WAC 246-290-315, or as directed by
					 the department.
Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart A - Public Notification and Consumer Information › Section 246-290-71007 - Public notification special provisions

Current through Register Vol. 24-14, July 15, 2024
(1) When circumstances dictate, the purveyor
					 shall give a broader or more immediate notice to protect public health. The
					 department may require the purveyor's notification by whatever means
					 necessary.
(2) When the state board
					 of health grants a public water system a waiver, the purveyor shall notify
					 consumers and new billing units or new customers before water service begins.
					 The purveyor shall provide a notice annually and send a copy to the
					 department.
(3) The department may
					 give notice to the water system users and the owner or operator of any
					 consecutive water system served as required by this section on behalf of the
					 water purveyor. However, the purveyor remains responsible for ensuring Part 7,
					 Subpart A requirements are met.
Statutory Authority: RCW 43.20.050(2) and (3) and
						  70.119A.080. 03-08-037, § 246-290-71007, filed 3/27/03, effective
						  4/27/03.