Authority: IC 13-13-5; IC 13-14-8-7; IC 13-14-9; IC 13-18-3;
IC 13-18-16
Affected: IC 13-11-2-140.8; IC 13-18
Sec. 1.
In addition to the definitions in IC 13-11-2 and
327
IAC 8-1, the following definitions apply throughout
this rule,
327 IAC
8-2.1,
327 IAC 8-2.3,
327 IAC
8-2.5, and
327 IAC
8-2.6:
(1)
"Act" means the Safe Drinking Water Act (42 U.S.C.
300f et seq.).
(2) "Action level" means the concentration of
lead or copper in water specified in section 36(c) of this rule that
determines, in some cases, the treatment requirements contained in sections 36
through 47 of this rule that a water system is required to complete.
(3) "Adjustment program" means the addition
of fluoride to drinking water by a PWS for the prevention of dental
cavities.
(4) "Administrator" means
the administrator of the U.S. EPA.
(5) "Bag filters" means pressure-driven
separation devices that remove particulate matter larger than one (1)
micrometer (µm) using an engineered porous filtration media. They are
typically constructed of a nonrigid, fabric filtration media housed in a
pressure vessel in which the direction of flow is from the inside of the bag to
the outside.
(6) "Bank filtration"
means a water treatment process that uses a well to recover surface water that
has naturally infiltrated into ground water through a river bed or bank.
Infiltration is typically enhanced by the hydraulic gradient imposed by a
nearby pumping water supply or other well.
(7) "Best available technology" or "BAT"
means best technology, treatment techniques, or other means that the
commissioner finds are available, after examination for efficacy under field
conditions, and not solely under laboratory conditions, and after taking cost
into consideration. For the purpose of setting MCLs for synthetic organic
chemicals, any BAT must be at least as effective as granular activated
carbon.
(8) "Cartridge filters"
means pressure-driven separation devices that remove particulate matter larger
than one (1) micrometer (µm) using an engineered porous filtration media.
They are typically constructed as rigid or semirigid, self-supporting filter
elements housed in pressure vessels in which the flow is from the outside of
the cartridge to the inside.
(9)
"Coagulation" means a process using coagulant chemicals and mixing by which
colloidal and suspended materials are destabilized and agglomerated into
flocs.
(10) "Combined distribution
system" means the interconnected distribution system consisting of the
distribution system of wholesale systems and of the consecutive systems that
receive finished water.
(11)
"Commissioner" means the commissioner of the Indiana department of
environmental management or the designated agent of the commissioner.
(12) "Community water system", "CWS",
"community public water supply system", or "CPWSS" means a PWS that:
(A) serves at least fifteen (15) service
connections used by year-round residents; or
(B) regularly serves at least twenty-five
(25) year-round residents.
(13) "Compliance cycle" means the nine (9)
year calendar year cycle during which PWSs must monitor. Each compliance cycle
consists of three (3) three-year compliance periods that continue in
perpetuity. The first compliance cycle is established according to the
following:
(A) The first calendar year cycle
begins January 1, 1993, and ends December 31, 2001.
(B) The second calendar year cycle begins
January 1, 2002, and ends December 31, 2010.
(C) The third calendar year cycle begins
January 1, 2011, and ends December 31, 2019.
(14) "Compliance period" means a three (3)
year calendar year period within a compliance cycle. Each compliance cycle has
three (3) three-year compliance periods. The following shows the compliance
periods within the compliance cycles shown as an example in subdivision (13):
(A) Within the first compliance cycle, the
compliance periods are as follows:
(i) The
first compliance period runs from January 1, 1993, to December 31,
1995.
(ii) The second compliance
period runs from January 1, 1996, to December 31, 1998.
(iii) The third compliance period runs from
January 1, 1999, to December 31, 2001.
(B) Within the second compliance cycle, the
compliance periods are as follows:
(i) The
first compliance period runs from January 1, 2002, to December 31,
2004.
(ii) The second compliance
period runs from January 1, 2005, to December 31, 2007.
(iii) The third compliance period runs from
January 1, 2008, to December 31, 2010.
(C) Within the third compliance cycle, the
compliance periods are as follows:
(i) The
first compliance period runs from January 1, 2011, to December 31,
2013.
(ii) The second compliance
period runs from January 1, 2014, to December 31, 2016.
(iii) The third compliance period runs from
January 1, 2017, to December 31, 2019.
(15) "Comprehensive performance evaluation"
or "CPE" means 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.
For purposes of compliance with
327
IAC 8-2.6-1, the CPE must consist of at least the
following components:
(A) Assessment of plant
performance.
(B) Evaluation of
major unit processes.
(C)
Identification and prioritization of performance limiting factors.
(D) Assessment of the applicability of
comprehensive technical assistance.
(E) Preparation of a CPE report.
(16) "Confluent growth" means a
continuous bacterial growth covering the entire filtration area of a membrane
filter, or a portion thereof, in which bacterial colonies are not
discrete.
(17) "Consecutive system"
means a PWS that receives some or all of its finished water from one (1) or
more wholesale systems. Delivery can be through a direct connection or through
the distribution system of one (1) or more consecutive systems. (18)
"Contaminant" means any:
(A)
microorganisms;
(B)
chemicals;
(C) waste;
(D) physical substance;
(E) radiological substance; or
(F) wastewater; introduced or found in the
drinking water.
(19)
"Conventional filtration treatment" means a series of processes, including:
(A) coagulation;
(B) flocculation;
(C) sedimentation; and
(D) filtration; resulting in substantial
particulate removal.
(20) "Corrosion inhibitor" means a substance
capable of reducing the corrosivity of water toward metal plumbing materials,
especially lead and copper, by forming a protective film on the interior
surface of those materials.
(21)
"CT" or "CTcalc" means the product of residual disinfectant concentration (C)
in milligrams per liter determined before or at the first customer and the
corresponding disinfectant contact time (T) in minutes, such as C × T. If
a PWS applies disinfectants at more than one (1) point prior to the first
customer, the PWS must determine the CT of each disinfectant sequence before or
at the first customer to determine the total percent inactivation or total
inactivation ratio. In determining the total inactivation ratio, the PWS must
determine the residual disinfectant concentration of each disinfection sequence
and corresponding contact time before any subsequent disinfection application
point. CT
99.9 is the CT value required for ninety-nine
and nine-tenths percent (99.9%) (3-log) inactivation of Giardia lamblia cysts.
CT
99.9 for a variety of disinfectants and conditions
appears in Tables 1.1 through 1.6, 2.1, and 3.1 of
40 CFR
141.74(b)(3) *.
Click here to view
image.
is the inactivation ratio. The sum of the inactivation ratios
or total inactivation ratio shown as:
Click here to view
image.
is calculated by adding together the inactivation ratio for
each disinfection sequence. A total inactivation ratio equal to or greater than
one (1.0) is assumed to provide a 3-log inactivation of Giardia lamblia
cysts.
(22) "Diatomaceous
earth filtration" means a process resulting in substantial particulate removal
in which:
(A) a precoat cake of diatomaceous
earth filter media is deposited on a support membrane (septum); and
(B) while the water is filtered by passing
through the cake on the septum, additional filter media known as body feed are
continuously added to the feed water to maintain the permeability of the filter
cake.
(23) "Direct
filtration" means a series of processes, including coagulation and filtration
but excluding sedimentation, resulting in substantial particulate
removal.
(24) "Disinfectant" means
any oxidant, including, but not limited to:
(A) chlorine;
(B) chlorine dioxide;
(C) chloramines; and
(D) ozone; added to water in any part of the
treatment or distribution process that is intended to kill or inactivate
pathogenic microorganisms.
(25) "Disinfectant contact time" or "T in CT
calculations" means the time in minutes that it takes for water to move from
the point of disinfectant application or the previous point of disinfectant
residual measurement to a point before or at the point where residual
disinfectant concentration (C) is measured. Where only one (1) C is measured, T
is the time in minutes that it takes for water to move from the point of
disinfectant application to a point before or at where C is measured. Where
more than one (1) C is measured, T is:
(A) for
the first measurement of C, the time in minutes that it takes for water to move
from the first or only point of disinfectant application to a point before or
at the point where the first C is measured; and
(B) for subsequent measurements of C, the
time in minutes that it takes for water to move from the previous C measurement
point to the C measurement point for which the particular T is being
calculated.
Disinfectant contact time in pipelines must be calculated
based on plug flow by dividing the internal volume of the pipe by the maximum
hourly flow rate through that pipe. Disinfectant contact time within mixing
basins and storage reservoirs must be determined by tracer studies or an
equivalent demonstration.
(26) "Disinfection" means a process that
inactivates pathogenic organisms in water by chemical oxidants or equivalent
agents. (27) "Disinfection profile" means a summary of daily Giardia lamblia
inactivation through a treatment plant. The procedure for developing a
disinfection profile is contained in:
(A)
327
IAC 8-2.6-2 for systems serving at least ten thousand
(10,000) individuals; and
(B)
327
IAC 8-2.6-2.1 for systems serving fewer than ten
thousand (10,000) individuals.
(28) "Domestic or other nondistribution
system plumbing problem" means a coliform contamination problem in a PWS with
more than one (1) service connection that is limited to the specific service
connection from which the coliform-positive sample was taken.
(29) "Dose equivalent" means the product of
the absorbed dose from ionizing radiation and factors that account for
differences in biological effectiveness due to the type of radiation and its
distribution in the body as specified by the International Commission on
Radiological Units and Measurements (ICRUM).
(30) "Drinking water violation" means
violations of the:
(A) MCL;
(B) treatment technique (TT);
(C) monitoring requirements; and
(D) testing procedures; in this rule.
327
IAC 8-2.1-16 identifies the tier assignment for each
specific violation or situation requiring a public notice. (31) "Dual sample
set" means a set of two (2) samples collected at the same time and at the same
location, with one (1) sample analyzed for TTHM and the other sample analyzed
for HAA5. Dual sample sets are collected under
327 IAC
8-2.5-10 through
327
IAC 8-2.5-20.
(32) "Effective corrosion inhibitor residual"
means a concentration sufficient to form a passivating film on the interior
walls of a pipe for the purpose of sections 36 through 47 of this rule
only.
(33) "Enhanced coagulation"
means the addition of sufficient coagulant for improved removal of disinfection
byproduct precursors by conventional filtration treatment.
(34) "Enhanced softening" means the improved
removal of disinfection byproduct precursors by precipitative
softening.
(35) "Filter profile"
means a graphical representation of individual filter performance, based on
continuous turbidity measurements or total particle counts 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.
(36) "Filtration" means a process
for removing particulate matter from water by passage through porous
media.
(37) "Finished water" means
water that is:
(A) introduced into the
distribution system of a PWS; and
(B) intended for distribution and consumption
without further treatment, except treatment necessary to maintain water quality
in the distribution system (for example, booster disinfection or addition of
corrosion control chemicals).
(38) "First draw sample" means a one (1)
liter sample of tap water collected in accordance with section 37 of this rule
that:
(A) has been standing in the plumbing
pipes at least six (6) hours; and
(B) is collected without flushing the
tap.
(39) "Flocculation"
means a process to enhance agglomeration or collection of smaller floc
particles into larger, more easily settleable particles through gentle stirring
by hydraulic or mechanical means.
(40) "Flowing stream" means a course of
running water flowing in a definite channel.
(41) "GAC10" means granular activated carbon
filter beds with an empty-bed contact time of ten (10) minutes based on average
daily flow and a carbon reactivation frequency of every:
(A) one hundred eighty (180) days;
or
(B) one hundred twenty (120)
days when the carbon reactivation frequency for GAC10 is used as a BAT for
compliance with MCLs under
327
IAC 8-2.5-2(b).
(42) "GAC20" means granular activated carbon
filter beds with an empty-bed contact time of twenty (20) minutes based on
average daily flow and a carbon reactivation frequency of every two hundred
forty (240) days.
(43) "Gross alpha
particle activity" means the total radioactivity due to alpha particle emission
as inferred from measurements on a dry sample.
(44) "Gross beta particle activity" means the
total radioactivity due to beta particle emission as inferred from measurements
on a dry sample.
(45) "Ground water
under the direct influence of surface water" means any water beneath the
surface of the ground with:
(A) significant
occurrence of insects or other macroorganisms, algae, or large-diameter
pathogens such as Giardia lamblia or, for Subpart H systems serving at least
ten thousand (10,000) individuals and beginning January 1, 2005, systems
serving fewer than ten thousand (10,000) individuals, Cryptosporidium;
or
(B) significant and relatively
rapid shifts in water characteristics, such as:
(i) turbidity;
(ii) temperature;
(iii) conductivity; or
(iv) pH; that closely correlate to
climatological or surface water conditions.
Direct influence must be determined for individual sources in
accordance with criteria established by the commissioner. The commissioner's
determination of direct influence may be based on site-specific measurements of
water quality or documentation of well construction characteristics and geology
with field evaluation, or both.
(46) "Haloacetic acids (five)" or "HAA5"
means the sum of the concentrations in milligrams per liter of the haloacetic
acid compounds:
(A) monochloroacetic
acid;
(B) dichloroacetic
acid;
(C) trichloroacetic
acid;
(D) monobromoacetic acid;
and
(E) dibromoacetic acid; rounded
to two (2) significant figures after addition.
(47) "Halogen" means one (1) of the following
chemical elements:
(A) Chlorine.
(B) Bromine.
(C) Iodine.
(48) "Initial compliance period" means
January 1993 to December 1995 for the contaminants listed in the following:
(A) Section 4 of this rule, other than the
following:
(i) Arsenic.
(ii) Barium.
(iii) Cadmium.
(iv) Fluoride.
(v) Lead.
(vi) Mercury.
(vii) Selenium.
(viii) Silver.
(B) Section 5 of this rule.
(C) Section 5.4(a) of this rule, other than
the following:
(i) Benzene.
(ii) Vinyl chloride.
(iii) Carbon tetrachloride.
(iv) 1,2-dichloroethane.
(v) Trichloroethylene.
(vi) 1,1-dichloroethylene.
(vii) 1,1,1-trichloroethane.
(viii) para-dichlorobenzene.
(49) "Lake" or
"reservoir" means a natural or manmade basin or hollow on the earth's surface
in which water collects or is stored that can or cannot have a current or
single direction of flow.
(50)
"Large water system" means a water system that serves more than fifty thousand
(50,000) people for the purpose of sections 36 through 47 of this rule
only.
(51) "Lead service line"
means a service line made of lead that connects the water main to the building
inlet and any:
(A) lead pigtail;
(B) gooseneck; or
(C) other fitting; that is connected to the
lead line.
(52)
"Legionella" means a genus of bacteria, some species of which have caused a
type of pneumonia called Legionnaires Disease.
(53) "Locational running annual average" or
"LRAA" means the average of sample analytical results for samples taken at a
particular monitoring location during the previous four (4) calendar
quarters.
(54) "Manmade beta
particle and photon emitters" means all radionuclides emitting:
(A) beta particle;
(B) photons; or
(C) both clauses (A) and (B); listed in
"Maximum Permissible Body Burdens and Maximum Permissible Concentration of
Radionuclides in Air or Water for Occupational Exposure", NBS Handbook 69, as
amended August 1963**, U.S. Department of Commerce, except the daughter
products of thorium-232, uranium-235, and uranium-238.
(55) "Maximum contaminant level" or "MCL"
means the maximum permissible level of a contaminant in water that is delivered
to the free flowing outlet of the ultimate user of a PWS, except in the case of
turbidity where the maximum permissible level is measured at the point of entry
to the distribution system. The term does not include contaminants added to the
water under circumstances controlled by the user, except those resulting from
corrosion of piping and plumbing caused by water quality.
(56) "Maximum contaminant level goal" or
"MCLG" means the maximum level of a contaminant in drinking water:
(A) at which no known or anticipated adverse
effect on the health of persons would occur; and
(B) that includes an adequate margin of
safety.
(57) "Maximum
residual disinfectant level" or "MRDL" means a level of a disinfectant added
for water treatment that may not be exceeded at the consumer's tap without an
unacceptable possibility of adverse health effects.
(58) "Maximum residual disinfectant level
goal" or "MRDLG" means the maximum level of a disinfectant added for water
treatment:
(A) at which no known or
anticipated adverse effect on the health of individuals would occur;
and
(B) that allows an adequate
margin of safety.
(59)
"Maximum total trihalomethane potential" or "MTP" means the maximum
concentration of TTHM produced in a given water containing a disinfectant
residual after seven (7) days at a temperature of twenty-five (25) degrees
Celsius or above.
(60) "Medium size
water system" means a water system that serves greater than three thousand
three hundred (3,300) and less than or equal to fifty thousand (50,000) persons
for the purpose of sections 36 through 47 of this rule only.
(61) "Membrane filtration" means the
following:
(A) A pressure or vacuum driven
separation process in which:
(i) particulate
matter larger than one (1) micrometer (µm) is rejected by an engineered
barrier, primarily through a size-exclusion mechanism; and
(ii) a measurable removal efficiency of a
target organism can be verified through the application of a direct integrity
test.
(B) The term
includes the common membrane technologies of:
(i) microfiltration;
(ii) ultrafiltration;
(iii) nanofiltration; and
(iv) reverse osmosis.
(62) "Near the first service
connection" means at one (1) of the twenty percent (20%) of all service
connections in the entire system that are nearest the water supply treatment
facility, as measured by water transport time within the distribution
system.
(63) "Noncommunity water
system", "NCWS", "noncommunity public water supply system", "NCPWSS", or
"noncommunity public water system" has the meaning set forth at IC
13-11-2-140.8.
(64) "Nontransient
noncommunity water system" or "NTNCWS" means a PWS that is not a CWS that
regularly serves the same twenty-five (25) or more persons at least six (6)
months per year.
(65) "Optimal
corrosion control treatment" means the corrosion control treatment that
minimizes the lead and copper concentrations at users' taps while ensuring that
the treatment does not cause the water system to violate this article for the
purpose of sections 36 through 47 of this rule only.
(66) "Performance evaluation sample" or "PE
sample" means a reference sample provided to a laboratory for the purpose of
demonstrating that the laboratory can successfully analyze the sample within
limits of performance specified by the administrator. The true value of the
concentration of the reference material is unknown to the laboratory at the
time of the analysis.
(67)
"Picocuri" or "pCi" means the quantity of radioactive material producing two
and twenty-two hundredths (2.22) nuclear transformations per minute.
(68) "Plant intake" means the works or
structures at the head of a conduit through which water is diverted from a
source, for example, a river or lake, into a treatment plant.
(69) "Point of disinfectant application"
means the point where:
(A) the disinfectant is
applied; and
(B) water downstream
of that point is not subject to recontamination by surface water
runoff.
(70)
"Point-of-entry treatment device" or "POE" means a treatment device applied to
the drinking water entering a house or building for the purpose of reducing
contaminants in drinking water distributed throughout the house or
building.
(71) "Point-of-use
treatment device" or "POU" means a treatment device to a single tap used for
the purpose of reducing contaminants in drinking water at that one (1)
tap.
(72) "Presedimentation" means
a preliminary treatment process used to remove:
(A) gravel;
(B) sand; and
(C) other particulate material; from the
source water through settling before the water enters the primary clarification
and filtration processes in a treatment plant.
(73) "Primacy agency" means the department of
environmental management where the department exercises primary enforcement
responsibility as granted by the EPA.
(74) "Public water system", "public water
supply", "public water supply system", "PWS", or "PWSS":
(A) means a system for the provision to the
public of water for human consumption through pipes or other constructed
conveyances, if the system:
(i) has at least
fifteen (15) service connections; or
(ii) regularly serves an average of at least
twenty-five (25) individuals daily at least sixty (60) days out of the
year;
(B) includes any:
(i) collection, treatment, storage, and
distribution facilities under control of the operator of the system and used
primarily in connection with the system; and
(ii) collection or pretreatment storage
facilities not under the operator's control that are used primarily in
connection with the system; and
(C) is either a CWS, as defined in
subdivision (12), or an NCWS, as defined in subdivision (63).
(75) "Rem" means the unit of dose
equivalent from ionizing radiation to the total body or any internal organ or
organ system. A millirem (mrem) is one-thousandth (1/1,000) of a rem.
(76) "Repeat compliance period" means any
subsequent compliance period after the initial compliance period.
(77) "Residual disinfectant concentration" or
"C in CT calculations" means the concentration of disinfectant measured in
milligrams per liter in a representative sample of water.
(78) "Sanitary survey" means an on-site
review of the:
(A) water source;
(B) facilities;
(C) equipment;
(D) operation; and
(E) maintenance; of a PWS for the purpose of
evaluating the adequacy of clauses (A) through (E) for producing and
distributing safe drinking water.
(79) "Sedimentation" means a process for
removal of solids before filtration by gravity or separation.
(80) "Service interruption" means a
disturbance in the provision of water to a customer affecting quality or
quantity.
(81) "Service line
sample" means a one (1) liter sample of water collected in accordance with
section 37(b)(3) of this rule that has been standing at least six (6) hours in
a service line.
(82) "Single family
structure" means a building constructed as a single family residence that is
currently being used as a:
(A) residence;
or
(B) place of business; for the
purpose of sections 36 through 47 of this rule only.
(83) "Slow sand filtration" means a process:
(A) involving passage of raw water through a
bed of sand at low velocity (generally less than four-tenths (0.4) meter per
hour or forty-five (45) to one hundred fifty (150) gallons per day per square
foot); and
(B) resulting in
substantial particulate removal by physical and biological
mechanisms.
(84) "Small
water system" means a water system that serves three thousand three hundred
(3,300) persons or fewer for the purpose of sections 36 through 47 of this rule
only.
(85) "Standard sample" means
the aliquot of finished drinking water that is examined for the presence of
coliform bacteria.
(86) "Subpart H
system" means a PWS using:
(A) surface water;
or
(B) ground water under the
direct influence of surface water; as a source that is subject to
327 IAC
8-2.6.
(87) "Supplier of water" means any person
who:
(A) owns;
(B) operates; or
(C) both owns and operates; a PWS.
(88) "Surface water" means all
water occurring on the surface of the ground, including water in the following:
(A) A stream.
(B) Natural and artificial lakes.
(C) Ponds.
(D) Swales.
(E) Marshes.
(F) Diffused surface water.
(89) "SUVA" means specific
ultraviolet absorption at two hundred fifty-four (254) nanometers, an indicator
of the humic content of water. SUVA is a calculated parameter obtained by
dividing a sample's ultraviolet absorption at a wavelength of two hundred
fifty-four (254) nanometers (UV254) (in
m-1) by its concentration of dissolved organic
carbon (DOC) (in milligrams per liter).
(90) "System with a single service
connection" means a PWS that supplies drinking water to consumers via a single
service line.
(91) "Too numerous to
count" means that the total number of bacterial colonies exceeds two hundred
(200) on a forty-seven (47) millimeter diameter membrane filter used for
coliform detection.
(92) "Total
organic carbon" or "TOC" means total organic carbon in milligrams per liter,
measured using:
(A) heat;
(B) oxygen;
(C) ultraviolet irradiation;
(D) chemical oxidants; or
(E) combinations of these oxidants in clauses
(A) through (D); that convert organic carbon to carbon dioxide, rounded to two
(2) significant figures.
(93) "Total trihalomethanes" or "TTHM" means
the sum of the concentration in milligrams per liter of the THM compounds:
(A) trichloromethane (chloroform);
(B) dibromochloromethane;
(C) bromodichloromethane; and
(D) tribromomethane (bromoform); rounded to
two (2) significant figures.
(94) "Transient noncommunity water system" or
"TWS" means an NCWS that does not regularly serve at least twenty-five (25) of
the same persons over six (6) months per year.
(95) "Trihalomethane" or "THM" means one (1)
of the family of organic compounds, named as derivatives of methane, wherein
three (3) of the four (4) hydrogen atoms in methane are each substituted by a
halogen atom in the molecular structure. (96) "Two-stage lime softening" means
a process in which chemical addition and hardness precipitation occur in each
of two (2) distinct unit clarification processes in series prior to
filtration.
(97) "Uncovered
finished water storage facility" means a facility:
(A) such as:
(i) a tank;
(ii) a reservoir; or
(iii) another facility; open to the
atmosphere that is used to store water that will undergo no further treatment
to reduce microbial pathogens except residual disinfection; and
(B) that is directly open to the
atmosphere.
(98)
"Undetectable disinfectant residual" means a disinfectant residual level that
is less than:
(A) two-tenths (0.2) milligram
per liter measured as free chlorine;
(B) five-tenths (0.5) milligram per liter
measured as combined chlorine (chloramines); or
(C) one-tenth (0.1) milligram per liter
measured as chlorine dioxide.
The commissioner may require a system to demonstrate the
level of chloramines present when measured as combined chlorine under clause
(B).
(99) "U.S.
EPA" or "EPA" means the United States Environmental Protection
Agency.
(100) "Virus" means a virus
of fecal origin that is infectious to humans by waterborne
transmission.
(101) "Waterborne
disease outbreak" means the significant occurrence of acute infectious illness
epidemiologically associated with the ingestion of water from a PWS that is
deficient in treatment as determined by the commissioner.
(102) "Water loss" means the following:
(A) A calculation based on the difference
between the following:
(i) The amount of water
produced or purchased.
(ii) The
annual volume of water metered, including unmetered water taken by the
following:
(AA) Customers authorized to take
water.
(BB) The water
system.
(CC) Others authorized to
take water.
(B) Inclusions of the following:
(i) Unauthorized consumption.
(ii) Metering inaccuracies.
(iii) Data handling errors.
(iv) Leaks, breaks, and overflows on the
following:
(AA) Mains.
(BB) Service reservoirs.
(CC) Service connections up to the point of
customer metering.
(103) "Wholesale system" means a PWS that:
(A) treats source water as necessary to
produce finished water; and
(B)
delivers some or all of that finished water to another PWS.
Delivery can be through a direct connection or through the
distribution system of one (1) or more consecutive systems.
*This document is incorporated by reference. Copies may be
obtained from the Government Publishing Office, www.gpo.gov, or are available for review at the
Indiana Department of Environmental Management, Office of Legal Counsel,
Indiana Government Center North, 100 North Senate Avenue, Thirteenth Floor,
Indianapolis, Indiana 46204.
**This document is incorporated by reference. Copies may be
obtained from the Government Publishing Office, www.gpo.gov, U.S. EPA National Service Center for
Environmental Publications (www.epa.gov/nscep), or are available for review
at the Indiana Department of Environmental Management, Office of Legal Counsel,
Indiana Government Center North, Thirteenth Floor, 100 North Senate Avenue,
Indianapolis, Indiana 46204.