Louisiana Administrative Code › Title 51 - PUBLIC HEALTH-SANITARY CODE › Part XII - Water Supplies › Chapter 11 - Surface Water Treatment Rule › Subchapter A - General Requirements and Definitions › Section XII-1103 - Definition of Terms

Current through Register Vol. 50, No. 6, June 20, 2024
A.
				  Words Not Defined. Words not defined in this Chapter shall have the meanings
				  stated in
				  §101 of this Part or other Parts of the
				  Louisiana state sanitary code. When words not defined in this Chapter are
				  defined in both
				  §101 of this Part and in another Part of
				  the Louisiana state sanitary code, the definition contained within
				  §101 of this Part shall be given
				  preference as it pertains to water supplies. Words not defined in any of these
				  source documents shall have the meanings stated in the Merriam-Webster's
				  Collegiate Dictionary-Tenth Edition, as revised.
B. Definitions. Definitions contained in
				  §101 of this Part shall also apply to
				  this Chapter where the following special definitions apply.
Approved Surface Water
-a surface water or
					 GWUDISW that has received permit approval from the DHH as a source of water
					 supply for a public water system.
Best Available Technology
-for the purpose
					 of this Chapter in relation to the treatment of surface water, means
					 conventional filtration treatment which conforms with all of the requirements
					 of this Chapter.
Calibrationdra
-to
					 standardize [adjust the instrument response to a National Institute of
					 Standards and Technology (NIST) traceable standard] a disinfectant residual
					 analyzer (such as, but not limited to, a bench top or a continuous monitoring
					 disinfectant residual analyzer using colorimetry or spectrophotometry) by
					 determining the deviation from a NIST traceable standard so as to ascertain and
					 implement the proper correction factors in an attempt to obtain accurate and
					 reliable sample results.
CalibrationpH
-to
					 standardize (adjust the instrument response to a pH primary standard) a pH
					 meter (such as a bench top or continuous monitoring pH meter) by determining
					 the deviation from a pH primary standard so as to ascertain and implement the
					 proper correction factors in an attempt to obtain accurate and reliable
					 results.
Calibrationt
-to
					 standardize (adjust the instrument response to a turbidity primary standard) a
					 turbidimeter (such as a bench top or continuous monitoring turbidimeter)by
					 determining the deviation from a turbidity primary standard so as to ascertain
					 and implement the proper correction factors in an attempt to obtain accurate
					 and reliable sample results.
Calibrationtemp
-to
					 standardize [adjust the instrument response to a NIST traceable standard] a
					 temperature measuring device (such as a thermometer or thermocouple) by
					 determining the deviation from a NIST traceable standard so as to ascertain and
					 implement the proper correction factors in an attempt to obtain accurate and
					 reliable sample results.
Certified Operator
-for the purpose of
					 this Chapter, the individual, as examined by the committee of certification and
					 as approved by the state health officer, meeting all requirements of state law
					 and regulation and found competent to operate a treatment plant for a public
					 water system which utilizes surface water or GWUDISW as its source of water
					 supply.
Coagulation
-a process using coagulant
					 chemicals and rapid mixing by which colloidal and suspended material are
					 destabilized and agglomerated into settleable and/or filterable flocs.
Comprehensive Performance Evaluation
					 (CPE)
-a thorough review and analysis of a treatment plant's
					 performance-based capabilities and associated administrative, operation, and
					 maintenance practices. It is conducted to identify factors that may be
					 adversely impacting a plant's capability to achieve compliance and emphasizes
					 approaches that can be implemented without significant capital improvements. It
					 consists of at least the following components: assessment of plant performance;
					 evaluation of major unit processes; identification and prioritization of
					 performance limiting factors; assessment of the applicability of comprehensive
					 technical assistance; and, preparation of a CPE report.
Conventional Filtration Treatment
-a
					 series of treatment processes which includes coagulation, flocculation,
					 sedimentation, and filtration resulting in substantial particulate
					 removal.
Deep Bed Filtration
-a process for
					 removing particulate matter from water by passage through porous media
					 exceeding 42 inches in total depth. Underdrain gravels are not to be
					 included.
Diatomaceous Earth Filtration
-a process
					 resulting in particulate removal in which a precoat cake of graded diatomaceous
					 earth filter media is deposited on a support membrane (septum) and, while the
					 water is being filtered by passing through the cake on the septum, additional
					 filter media known as body feed is continuously added to the feed water to
					 maintain the permeability of the filter cake.
Direct Filtration Treatment
-a series of
					 processes including coagulation, flocculation, and filtration but excluding
					 sedimentation.
Disinfectant Contact Time
("T" in CT
					 calculations)-the time in minutes that it takes for water to move from the
					 point of disinfectant application or a previous point of disinfectant residual
					 measurement to a point before or at the point where residual disinfectant
					 concentration is measured. The point of measurement shall be before or at the
					 first customer. Disinfectant contact time in pipelines is calculated by
					 dividing the internal volume of the pipe by the flow rate through the pipe.
					 Disinfectant contact time with mixing basins and storage reservoirs is
					 determined by tracer studies or an equivalent demonstration to the DHH.
Disinfection
-a process which inactivates
					 pathogenic organisms in water by chemical oxidants or equivalent agents.
Disinfection Profile
-a summary of
Giardia lamblia
inactivation through the treatment plant. For
					 any system that uses chloramines, ozone, or chlorine dioxide for primary
					 disinfection, this term shall additionally include a summary of virus
					 inactivation through the treatment plant.
Engineering Report
-a water treatment
					 technical report prepared by a qualified engineer.
Filter Profile
-a graphical representation
					 of individual filter performance, based on continuous turbidity measurements
					 versus time for an entire filter run, from startup to backwash inclusively,
					 that includes an assessment of filter performance while another filter is being
					 backwashed.
Filtration
-a process for removing
					 particulate matter from water by passage through porous media.
Flocculation
-a process to enhance
					 agglomeration or collection of smaller floc particles into larger, more easily
					 settleable or filterable particles through gentle stirring by hydraulic or
					 mechanical means.
Groundwater under the Direct Influence of Surface
					 Water
(GWUDISW)-any water beneath the surface of the ground with
					 significant occurrence of insects or other macroorganisms, algae, or large
					 diameter pathogens such as
Giardia lamblia
or
Cryptosporidium
, or significant and relatively rapid shifts in
					 site specific water characteristics such as turbidity, temperature,
					 conductivity or pH which closely correlate to climatological or surface water
					 conditions. The DHH determination of direct influence may be based on an
					 evaluation of site-specific measurements of water quality and/or documentation
					 of well construction characteristics and geology with field evaluation.
Heterotrophic Plate Count
(HPC)-laboratory analytical procedure for estimating the number of live
					 heterotrophic bacteria in water using instrumentation and methods as described
					 in
Standard Methods for the Examination of Water and
					 Wastewater
, 19th Edition. Results of such analysis is reported as
					 "colony-forming units per milliliter" (cfu/ml).
IESWTR
-Interim Enhanced Surface Water
					 Treatment Rule.
Legionella
-a genus of bacteria, some
					 species of which have caused a type of pneumonia called Legionnaires
					 disease.
Liquids from Dewatering Processes
-a
					 stream containing liquids generated from a unit used to concentrate solids for
					 disposal.
LT1ESWTR
-Long Term 1 Enhanced Surface
					 Water Treatment Rule.
LT2ESWTR
-Long Term 2 Enhanced Surface
					 Water Treatment Rule.
Multibarrier Treatment
-a series of water
					 treatment processes that provide for both removal and inactivation of
					 waterborne pathogens.
Nephelometric Turbidity Unit (NTU)
-a
					 measurement of the turbidity of water as determined by the comparison of the
					 intensity of light scattered by the sample to the intensity of incident light,
					 using instrumentation and methods described in §1105. B of this Chapter.
Peak Hourly Flow
-the maximum flow through
					 a particular disinfection segment over a one hour period during 24 hourly
					 periods in a calendar day.
Pressure Filter
-a pressurized vessel
					 containing properly sized and graded granular media.
Primary Standard
					 (Turbidity)
-
turbidity primary standard
.
Qualified Engineer
-any engineer who has
					 been registered under the provisions of
					 R.S.
					 37:681 et seq
.,
and who
					 holds a current certificate issued by the Louisiana Professional Engineering
					 and Land Surveying Board, and who has knowledge and experience in water
					 treatment plant design, construction, operation, and watershed
					 evaluations.
Residual Disinfectant Concentration
("C"
					 in CT calculations)-the concentration of the disinfectant in milligrams per
					 liter (mg/l) in a representative sample of water.
Sedimentation
-a process for removal of
					 settleable solids before filtration by gravity or separation.
Slow Sand Filtration
-a process involving
					 passage of raw water through a bed of sand at low velocity (less than 0.10
					 gallons per minute per square foot) resulting in substantial particulate
					 removal by physical and biological mechanisms.
Spent Filter Backwash Water
-a stream
					 containing particles that are dislodged from filter media when water is forced
					 back through the filter (backwashed) to clean the filter.
Supplier
-for the purpose of this Chapter,
					 means the owner or operator of a public water system.
Surface Water
-all water open to the
					 atmosphere and subject to surface runoff.
SWTR
-Surface Water Treatment Rule.
SWTR Guidance Manual
-U.S. EPA's Guidance
					 Manual for Compliance with the Filtration and Disinfection Requirements for
					 Public Water Systems using Surface Water Sources, March 1991 Edition.
Thickener Supernatant
-a stream containing
					 the decant from a sedimentation basin, clarifier or other unit that is used to
					 treat water, solids, or semi-solids from the primary treatment
					 processes.
Turbidity
-a measure of the decline of the
					 clarity of water caused by suspended and colloidal matter, such as clay, silt,
					 finely divided organic and inorganic matter, plankton, and other microscopic
					 organisms. It is formally expressed as the optical property that causes light
					 to be scattered and absorbed, rather than transmitted with no change in
					 direction through the sample.
Turbidity Level
-the value in NTU obtained
					 by measuring the turbidity of a representative grab sample of water at a
					 specified regular interval of time. If continuous turbidity monitoring is
					 utilized, the turbidity level is the discrete turbidity value at any given
					 time.
Turbidity Primary Standard
-a suspension
					 used to calibrate a turbidimeter, such as user-prepared formazin, commercial
					 stock formazin suspensions, or commercial styrene-divinylbenzene suspensions.
					 Such suspensions shall be prepared and used in conformity with the laboratory
					 methods described in §1105. B of this Chapter.
Validation
-to determine the degree of
					 deviation of a measuring instrument (such as a bench top or continuous
					 monitoring turbidimeter) from a primary standard by employing less
					 sophisticated or involved means typically employed during a calibration, such
					 as use of a state-approved secondary standard.
Virus
-any of a large group of
					 submicroscopic agents (that consist of a RNA or DNA core of genetic material
					 surrounded by a protein coat but no semipermeable membrane) that are capable of
					 growth and multiplication only in living cells and that are infectious to
					 humans by waterborne transmission and that cause various important diseases in
					 humans, including, but not limited to, poliomyelitis, aseptic meningitis,
					 infectious hepatitis, gastroenteritis, etc.
AUTHORITY NOTE:
					 Promulgated in accordance with
					 R.S.
					 40:4(A)(8),
					 R.S.
					 40:5(2)(3)(5)(6)(17)(20),
					 and
					 R.S.
					 40:1148.