ILLINOIS POLLUTION CONTROL BOARD
    March
    7, 1972
    In the Matter of
    #R 70—8
    EFFLUENT CRITERIA
    In the Matter of
    #R 71—14
    WATER QUALITY STANDARDS REVISIONS
    In the Matter of
    )
    WATER QUALITY STANDARDS REVISIONS
    )
    #R 71-20
    FOR INTRASTATE WATERS
    (SWB-14)
    )
    Opinion of the Board
    (by Mr. Currie):
    On May 12,
    1971,
    we published a proposed Chapter IV of
    the Rules and Regulations of the Pollution Control Board, comprising
    a complete recodification and revision of all existing regulations
    respecting water pollution.
    Extensive hearings were held
    throughout the State, from June
    to October.
    Upon studying the
    transcripts and exhibits, we published a partial proposed final
    draft on November 11, including principally those provisions,
    many of them originally proposed in #R 70-8 and the subject
    of separate hearings last winter, respecting effluent standards,
    permits, and control of storm overflows.
    On December 21 we
    published a second proposed final draft containing additional
    provisions considered at the hearings.
    On January
    6,
    1972,
    we adopted many of the provisions in the November
    11 draft
    (see
    opinion and order of that date), postponing effluent standards
    for deoxygenating wastes and for bacteria,
    as well as permit and
    overflow provisions.
    Final hearings were held on these subjects
    and on the December 21 draft,
    and we today adopt final provisions
    as to all remaining matters.
    Today’s regulations supplement
    and do not repeal those adopted January
    6.
    This opinion explains
    todayrs
    action.
    In large part today’s draft is simply
    a codification
    of
    existing water quality standards and associated provisions that
    are now scattered throughout a number of separate regulations
    that we inherited from the Sanitary Water Board.
    The new
    regulations, when adopted, will supersede the old except for
    determining violations alleged to have occurred prior to the
    effective date of the new regulations.
    In addition, today’s
    new regulations contain the following changes, among others:
    1)
    A more stringent dissolved-oxygen requirement for better
    protection of aquatic life.
    2)
    The.designatio~nof additional waters, such as the~‘remaining
    portions of the Illinois River, to be protected for aquatic

    —2—
    life and bodily contact.
    3)
    Additional communities required to go beyond traditional
    secondary sewage treatment.
    4)
    Limited relief from the highest degree of tertiary treatment
    for communities that can prove a more economical means
    of
    tertiary treatment sufficient to assure satisfactory water
    quality and compliance with water quality standards.
    5)
    Compliance programs required in certain cases to assure
    compliance with stream standards for ammonia and phosphorus.
    6)
    A two year acceleration of the deadline in most communities
    for control of pollution from combined sewer overflows,
    one of the State’s most serious water pollution problems.
    7)
    The highest degree of treatment required for sewage or
    similar wastes discharged to Lake Michigan.
    8)
    Allowance for treatment lagoons that small communities
    can afford and can operate successfully, provided water
    quality standards can be met.
    9)
    A December, 1973 deadline for treatment beyond secondary,
    based on recent changes
    in applicable laws.
    We have
    allowed up to one year in past cases for compliance with
    the Agency’s revised criteria respecting algae from
    effluent polishing lagoons.
    An additional six months
    seems
    a reasonable price for saving millions of dollars
    under today’s new standard.
    In addition, adherence to the
    existing paper deadline would not assure compliance by
    that date; most communities cannot meet that date in any
    event.
    10)
    Year-round disinfection of sewage
    treatment plant
    effluents.
    11)
    A prohibition of discharges
    to sewers that interfere
    with the operation of treatment plants.
    12)
    A comprehensive permit requirement for new and existing
    sources.
    13)
    Protection for underground waters.
    A section—by—section discussion follows.
    Rules
    101-103 are standard statements of the Board!s authority
    and policy, substantially as in present regulations, and a re-
    pealer of obsolete provisions.
    Rule 104 contains definitions
    in addition to those adopted January
    6.
    The definitions
    largely speak for themselves.
    Since the preceding drafts we
    have added an Agency—suggested definition of “Modification”

    —3—
    and revised the definitions of dilution ratio and population
    equivalent as urged by the Institute and by the Agency respective-
    ly.
    Our earlier definition
    of one P.E.
    as 0.2 pounds
    of BOD5
    per day was based on a misunderstanding of an Agency guide-
    line.
    Part II is the heart of the water quality standards and
    constitutes an updated version of the criteria now found in
    regulations SWB-7 through SWB-15:
    201
    Mixing Zones.
    Existing standards by and large provide
    for “reasonable admixture”
    of effluents in a mixing zone that
    is not subject to the water quality standards.
    This is necessary
    unless effluent standards are to be as stringent as water
    quality standards, which in some cases
    (e.g., temperature,
    see #R 70-16, Mississippi Thermal Standards, November 15,
    1971)
    would impose an unreasonable cost burden.
    At the same time,
    if the water quality standards are not to be undermined,
    the.
    area within mixing zones must be kept relatively small.
    Technical Release 20-22
    of the Sanitary Water Board,
    long used
    as
    a guideline without the force of a regulation, provided
    that reasonable mixing would be deemed to occur within 600 feet
    from the point of discharge.
    We have held that this figure
    represents the understanding of the Sanitary Water Board in
    adopting the reasonable mixture standard, at least with regard
    to the larger rivers, and therefore have required that on the
    Illinois, Wabash,
    Ohio,
    and Mississippi Rivers the standards
    be met outside
    a zone 600 feet in its greatest dimension.
    See
    Application of Commonwealth Edison Co.
    (Dresden #3),
    #
    70-21
    (March 3, 1971); Mississippi Thermal Standards,
    #
    R 70-16,
    supra; Ohio-Wabash Thermal Standards,
    #
    R 71-12, June 28, 1971.
    On the other hand, we have expressed doubt that such
    a large
    mixing zone could have been intended on small streams, since
    a few 600—foot zones on such streams would undermine
    the stream
    quality standards altogether.
    See EPA v. City of Champaign,
    # 7l—51C, September 16, 1971.
    The May 12 draft incorporated the 600-foot standard across
    the board, but consideration of the Champaign case,
    just cited,
    suggests a more flexible test is desirable.
    The basic standard
    •today adopted, therefore,
    is expressed in terms of the
    principle that mixing zones must be kept very small in proportion
    to stream volume.
    Although the application of this principle
    must be determined on a case—by-case basis, this approach appears
    to be more.’ responsive
    to the competing policy considerations
    underlying the mixing zone provisions than does any rigid size
    requirement.
    In response to other testimony received,
    today’s regula—
    tion
    alters the 600-foot linear zone—-here preserved as a
    maximum-—to a zone no larger than the area of a circle with 600-foot
    radius, by analogy to the Lake Michigan standard
    (#R 70-2, June
    9,
    1971), recognizing that in flowing streams the shape of a plume
    is likely to be long and thin in a downstream direction.

    —4—
    The earlier provision intended to prevent increasing the
    size of the mixing zone by multiplication
    of discharge points
    has been reworded to avoid unintended restrictions.
    The
    formerly rigid provision requiring a fixed proportion
    of the
    stream as a zone of passage for fish has been made more flexible
    in order to leave details to individual cases while preserving
    the principle that thermal or other pollution blocks’must be
    avoided.
    This provision applies only to waters protected for:
    aquatic
    life.
    202 Stream Flows.
    This Rule provides that water quality standards
    are to be met at all times except extreme
    low
    flows,
    This provision
    is the equivalent of that in existing regulations.
    An exception
    is provided,
    as in the Ohio—Wabash and Mississippi thermal
    standards,
    for brief excursions of temperature that are not
    likely to be harmful and that are the result of natural conditions
    peculiar to temperature.
    It is recognized that it may be
    necessary in the future to provide some type of episode control
    at times
    of extreme low flow in order to avoid harm to aquatic
    populations.
    203 General Standards.
    Today’s revision ~
    principle that all waters should be protected against nuisances
    and against health hazards to those near them;
    that all waters
    naturally capable of supporting aquatic life, with the exception
    of a few highly industrialized streams consisting primarily
    of effluents
    in the Chicago area,
    should be protected to support
    such life; and that waters that are used for public water supply
    should be clean enough that ordinary treatment processes will
    assure their potability.
    Consequently general standards for
    water quality
    are set that will protect most uses except public
    water supply; more stringent standards are set for places where
    water
    is withdrawn for public supply; and more lenient standards
    are set for those streams classified for restricted use.
    The
    general standards are found in Rule 203 and their discussion
    follows.
    They are taken largely from existing criteria for
    aquatic life.
    Stream use designations are found in Part III.
    203
    (a) preserves the existing requirements
    for freedom from
    nuisance.
    203
    (b) retains the existing
    DR
    values for aquatic
    life.
    203
    (c) provides a phosphorus limit for reservoirs and lakes and for
    streams tributary to them.
    The evidence is strong that phosphorus
    above this level in relatively still water can give rise
    to
    obnoxious algae blooms.
    The evidence does not support
    the
    need for a phosphorus standard in other situations, and the proposal
    for such a standard is here omitted.
    •So is the earlier proposal
    for an algae limit, which was too stringent to indicate the

    —5—
    presence of
    a nuisance.
    The evidence does not support any
    numerical standard for algae, and we rely upon the nuisance
    standard of 203
    (a).
    We have not defined “reservoir” or
    “lake” for want of an adequate definition.
    This will have to
    be worked out on a case-by-case basis
    in light of the policy
    here expressed.
    Not every navigation
    dam
    will be held to create
    a lake for this purpose.
    Despite the uncertainty,
    it does not
    seem appropriate to postpone necessary regulation for lack of
    a perfect definition.
    203
    (d)
    adopts the May 12 proposal
    (6.0 mg/i for 16 hours
    and 5.0 minimum)
    for dissolved oxygen requirements for aquatic
    life.
    The present standard (5.0 and 4.0)
    is not optimum
    according to the Green Book of the National Technical Advisory
    Committee on Water Quality Criteria.
    The testimony of Dr.
    John
    Pfeffer of the Institute for Environmental Quality, discussed
    in more detail below, strongly supports ‘the achievability of
    this revised standard, often without the highest degree of treat-
    ment that is feasible.
    203
    Ce)
    retains existing radioactivity levels.
    203
    (f)
    lists a number of important contaminants
    as follows.
    “Dissolved” values have been changed to “total” for reasons
    given in the explanation of the proposed final draft of Nov.
    11.
    P~mmoniaNitrogen.
    The present SWB-8 standard is 2.5 mg/i,
    which the Green Book (supra)
    says is acutely toxic to fish.
    The earlier 1.0 proposal was based upon a Minnesota standard.
    While the toxicity of ammonia is pH dependent, the Green Book
    recommends a limit of 1.5 mg/l,
    and that is here adopted.
    Arsenic.
    The May 12 proposed level of 1.0 mg/i was based
    upon existing
    SWB-8
    standards and the recommendation of McKee
    and Wolf, Water Quality Criteria, which is a well-respected
    literature survey,
    for protection of aquatic
    life.
    It is
    adopted today.
    Barium.
    The May 12 proposal, adopted here, of
    5.0 mg/i for
    aquatic life was based upon existing SWB-8 standards and the
    recommendation of McKee and Wolf.
    BOD.
    The May 12 draft proposed a stream standard of 7.0 for
    biochemical oxygen demand
    (5-day).
    Thjs was intended to facilitate
    determination of the degree of treatment required of dischargers
    without resort to complex formulas for computing oxygen sag and
    recovery.
    The evidence is that the effect of a given level
    of BOD on a stream
    is too dependent upon reaeration rates to
    make any prescribed standard meaningful.
    We have omitted it
    and will rely on the dilution ratios of Rule 404, together
    with proof of violation of dissolved oxygen levels by stream
    studies or otherwise, until more adequate proof is presented
    to support a BOD standard.

    —6—
    Boron.
    The May
    12 and today adopted level of 1.0 mg/l is
    based on evidence that higher levels can harm irrigated crops.
    While 100
    irrigation is unlikely in Illinois, the uncontrolled
    discharge of large quantities of boron is clearly undesirable.
    We have proposed no effluent standard because of the lack of
    evidence as to treatment methods.
    The testimony suggests that
    compliance with the stream standard should not be very difficult.
    Cadmium.
    The 0.05 value proposed on May 12 and adopted today
    is the same as the present SWB-8 for aquatic life.
    McKee and
    Wolf suggest that an even lower value might be appropriate to
    protect some fish.
    Chloride.
    Chlorides are tolerated by aquatic life in relatively
    high concentrations; Professor Lackey, a recognized expert
    in fish biology, testified that 500 mg/i would be a safe limit,
    and there was no substantial dispute.
    This value will also,
    according to the evidence, protect against any serious problems
    in drinking water.
    The undesirability of an overly tight chloride
    standard is underlined by the high cost of chloride removal
    as well as the relatively innocuous nature of the material.
    Chromium.
    There is a dispute in the evidence as to tht toxicity
    of chromium.
    McKee and Wolf support the testimony that the
    toxicity of chromium toward fish and man has been exaggerated,
    but stress
    the toxicity of small amounts of hexavalent chromium
    to daphnia and other important fish foods.
    The values
    here adopted preserve the existing SWB-8 aquatic standards
    for hexavalent
    (0.05 mg/i)
    and trivalent
    (1.0)
    chromium since
    McKee and Wolf appear to justify the distinction with regard
    to effects on fish foods.
    The May 12 proposal was a single
    standard of 0.05.
    The federal government asks that we adopt
    a single strict standard since trivalent chromium may be
    converted to hexavalent after discharge.
    If it does the
    hexàvalent standard will apply,
    and we see no reason for a
    change.
    Copper.
    Existing copper standards vary:
    SWB-8’s
    is 0.04
    mg/i, while SWB—l2’s
    (Mississippi River)
    is the same
    (0.02)
    as
    that proposed May 12 and adopted today.
    This figure is based
    on McKee and Wolf’s recommendation for fish and aquatic
    life.
    Important fish foods
    are,readily killed by low concentrations
    of copper, and McKee and Wolf say 0.025 mg/i has been found to
    kill most fish in
    8 hours
    in the presence of 1.0 mg/i of zinc.
    Cyanide.
    The present SWB-8 standard of 0.025 mg/i, here adopted,
    is that recommended by Orsanco.
    Twice that concentration,
    say McKee and Wolf,
    has killed fish in a short time, while
    trout were found to survive
    27 days
    at 0.02 mg/i.
    The May
    12
    draft proposed 0.01 based upon the fact that such a level,
    not treatability,
    is the goal in setting water quality standards
    for general uses.

    —7—
    Fluoride.
    Fluoride can delay the hatching of fish eggs and has
    been reported by McKee and Wolf to kill trout at concentrations
    ranging from 2.3 to 7.2 mg/i.
    They recommend a standard of 1.5
    mg/i.
    The figure of 1.4, here repeated from the May 12 draft,
    is in line with that recommendation and also should assure a
    potable supply.
    Iron.
    The 1.0 mg/l standard proposed May 12 and adopted today is taken
    from the existing SWB—8.
    McKee and Wolf make no
    firm
    recommendation
    but report that dogfish survived a week’s exposure to
    1 to
    2
    mg/i of iron.
    Other species are said to have shown a lower toxic
    threshold.
    Lead.
    0.1 mg/i, proposed May 12 and adopted today,
    is the present
    SWB-8 aquatic standard and supported by McKee and Wolf’s recommendation
    of 0.1,
    a level above which lead is
    lethal to some fish and begins
    to interfere with the breakdown of oxygen—demanding materials.
    Manganese.
    There
    is no existing aquatic standard.
    The standard of
    1.0
    (May
    12 and today)
    is based upon McKee and Wolf’s report
    as to fish toxicity anddshould be easy to meet.
    Nickel.
    There is no existing standard.
    McKee and Wolf report
    one study finding that sticklabacks die as low as 0.8 mg/i,
    but that others find nickel less toxic than iron or zinc.
    Today’s rule,
    like that proposed
    May, 12,
    is ‘1.0 mg/i.
    Phenols.
    There is conflicting evidence as to the harmful level
    of phenols.
    The limiting value, according to the Green Book,
    is that concentrations above 0.1 mg/i impart a bad taste to
    fish.
    The May 12 draft and today’s rule substitute 0.1 in place of the
    present SWB-8 standard of 0.2.
    Selenium.
    No present aquatic standard exists,
    bu.t McKee and
    Wolf say 2.0 mg/i kill goldfish in eight days.
    The May 12 proposal of
    ~2.0therefore seems” too high, and 1.0
    is here adopted,
    as
    in the
    proposecffinal
    d~äft,
    in order to keep the water below the harmful level.
    Silver.
    The present
    SWB-8
    standard is 0.05 mg/i, but McKee
    and Wolf report lethal doses to some fish at levels an order of
    magnitude lower.
    Accordingly,as proposed ~May12., we adopt
    0.005 mg/I.
    Sulfates.
    As
    in the case of chlorides, some limit seems desirable
    to protect stock watering and fish~Dr. Lackey suggested that
    500 mg/i would afford adequate protection for fish;
    McKee and
    Wolf give the same figure for stock watering; and this level
    should avoid serious adverse effects on public water supplies as well
    according to McKee and Wolf.

    —8—
    Total Dissolved Solids.
    This level
    of 1000 mg/i too is based
    largely on Dr. Lackey’s testimony, confirmed by other witnesses
    and by McKee and Wolf,
    that aquatic life should not be harmed.
    Zinc.
    1.0
    is the present SWB-8 aquatic standard proposed May
    12 and adopted here.
    McKee and Wolf suggest that this is a safe
    ievel if the water is not particularly soft.
    Additional chemicals were suggested by various witnesses
    for inclusion in the table, such as antimony, cobalt,
    and tin.
    We recognize the desirability of adding more parameters and will
    welcome specific suggestions for future additions, but codification
    of the present standards should not be delayed while new parameters
    are explored.
    The May 12 draft contained a limit of 2.0 mg/i
    for the
    aggregate of toxic substances indicated by an asterisk in the
    above
    table.
    While the synergistic effect of various heavy
    metals or other toxics
    is
    a matter of considerable concern,
    we have insufficient basis for setting any particular number
    and therefore omitted this provision from the proposed final
    draft,
    leaving the question of synergism to be dealt with by
    general provisions such as paragraph
    (h)
    of Rule 203, below.
    The federal government calls our attention to a synergism
    formula in the NTAC Green Book, but we think opportunity for
    hearing should be afforded prior to the adoption of such a
    provision.
    203
    (g)
    tightens the bacterial limit from that designed for
    secondary contact to that described as safe for primary contact.
    This has the same effect
    as the May 12 draft, which provided
    a separate category of waters designated for primary contact
    but which designated all general waters for this use.
    Since
    disinfection is required of all relevant effluents, achieving
    the lower level should pose no great additional difficulty.
    Even if waters are not recommended for swimming because of other
    problems such as turbidity, barge traffic,
    or dangerous currents,
    they should not pose a health hazard to those who do use them.
    203
    (h) retains the present SWB-8 general provision that no
    ~u’bs~t’an~es
    shall be present in amounts representing a stated
    percentage of their toxic value to fish.
    This is most necessary
    because no regulation can possibly list all contaminants that
    are of concern.
    The May 12 list of pesticides
    is omitted.
    It was obviously
    incomplete and seems better left to the general toxicity provisions
    of Rule 203
    (h).

    —9—
    203
    (i)
    has been amended to incorporate the newly adopted
    temperature standards for the Mississippi, Ohio,
    and Wabash
    Rivers and to preserve the existing maximum values for other
    streams
    (except to substitute 90°for
    93 on the former industrial
    sector of the Illinois) pending further evidence
    as to actual
    temperature.
    The federal EPA urges us to adopt monthly
    maxima for other streams, which we shall be happy to do when
    we
    receive the necessary evidence.
    We are indebted to Mr.
    Clarence Stuebe for certain data from the water intake at
    Peoria that suggest the standard perhaps can be significantly
    tightened for some portions of the Illinois River.
    The separate criterion for primary contact
    (formerly
    Rule 204)
    is omitted for reasons given under Rule 203
    (g)
    above.
    Rule 204 states standards for public water supplies.
    Despite the conclusion of McKee and Wolf that the recommended
    Public Health Service standards for chlorides, sulfates,
    and
    total dissolved solids
    in desirable drinking water
    are. tighter
    than necessary as
    a regulatory matter, we have put back into
    today’s regulation the existing requirement that all Public
    Health Service standards be met, on the recommendation of
    both federal and state EPA’s and evidence that most Illinois
    waters are safely within these standards.
    Further proof of
    hardship is necessary to modify
    these existing standards.
    We have also reinstated the provision that the public supply
    standards need be met only where water is withdrawn for public
    supply.
    This provision will assure that water is satisfactory
    wherever it is taken, without requiring expensive cleanups
    of effluents where
    the water is not used for public supply.
    The construction of new public supply intakes will in some cases
    therefore require additional treatment of effluents upstream.
    Since general criteria apply to all waters designated for
    public supply, the present regulation omits separate requirements
    for those parameters whose general standards are tight enough
    to protect public supplies; boron, chromium, copper,
    fluoride,
    mercury, silver, and zinc.
    The remaining standards are
    based largely upon the Public Health Service standards,
    as
    amplified by the Green Book and by McKee and Wolf.
    While
    the PHS explicitly states that its standards are intended to
    prescribe the quality of finished rather than of raw water,
    it is clear from the evidence that many of the metals
    and
    other contaminants here listed are not substantially affected
    by ordinary water supply treatment,
    and therefore,
    as the Green
    Book recommends, the raw water must itself meet the standard
    to assure satisfactory finished water.
    The standards for barium, cadmium,
    lead, and selenium--
    together with chromium and silver, which are covered by
    general standards——are taken from the Public Health Service

    —10—
    standards whose violation in finished water results in rejection
    of the supply.
    These are toxic materials not removed by ordinary
    treatment of raw water.
    These numbers represent existing SWB-8
    standards.
    ~Forarsenic, the present standard, taken from the
    PHS rejection standard,
    is 0.05;. as proposed May~i2, we have
    ‘tightened this to 0.01, which the PHS gives as the level that
    should not be exceeded if better supplies are available.
    It
    seems reasonable to require that supplies be made to meet that
    recommended standard.
    The standard for nitrates and nitrites
    is an important one.based upon health dangers to infants, and
    these ions are not removed by standard treatment.
    Other existing SWB-8 standards preserved in today’s list
    include carbon chloroform extract
    (CCE)
    ,
    a measure of objectionable
    organic material; iron, which like the additional parameter of
    manganese for which there has been no standard causes problems
    of taste and of laundry color; methylene blue active substances,
    which cause taste problems and indicate recent sewage pollution;
    and phenols, which also cause taste problems.
    Cyanide
    (SWB-8
    prescribes the same value of 0.025 mg/i as for aquatic life)
    is reduced,as proposed in May;.~to0.01 mg/i on
    the basis of the recommended PHS standard.
    The existing oil
    standard has been quantified.
    The other concentrations discussed
    in this paragraph are based on PHS standards.
    ~Theextent to
    which these parameters are reduced by ordinary treatment is
    dispu”tèd
    The PHS says at least
    some
    of them are, and there-
    fore fth~Ii~sthat raw water need not meet such strict standards;
    the Green Book says otherwise, and for safety’s sake these
    standards, mostly taken from present law,
    are here preserved.
    As
    in the general standards,
    specific pesticide numbers
    are omitted.
    A new paragraph
    (c)
    is intended to guard against
    the presence of toxic substances, for which numerical standards
    are not provided.
    205
    Restricted Use Standards.
    This Rule has been substantially
    revised to provide that aquatic life standards for various toxic
    materials need not be met since these waters are not protected
    for aquatic life.
    The standards are intended to assure against
    nuisance conditions,and,
    to protect other waters downstream,
    the water quality in restricted waters is required to meet the
    applicable effluent standards.
    The temperature standard has
    been modified in response to a suggestion, from Commonwealth
    Edison Company,
    in order to avoid expensive cooling devices
    that are not necessary to the avoidance of nuisances
    or’ safety
    hazards.
    206 Lake Michigan.
    Certain parameters taken from existing
    standards are preserved to require this high-quality lake to remain
    especially clean for esthetic and recreational purposes, in
    accordance with the important non-degradation policy.
    Similar
    provisions
    to protect other waters of unusually high quality have
    been omitted from the present draft for lack of evidence as to
    which waters are entitled to such protection.
    The Lake Michigan
    provisions establishthe principle of special protection for

    —11—
    high-quality waters,
    and additional waters may be added in the
    future when the evidence so demands.
    The Lake Michigan temperature standard recently adopted
    has been inserted.
    207
    Underground Waters.
    Protection of groundwater is of paramount
    importance.
    The provision has been amended to make clear it
    does not protect natural brines or deal with the problem of
    deep—well disposal except to assure protection of present or
    potential water supplies.
    208 Nondegradation.
    This preserves the present prohibition of
    unnecessary degradation of waters presently of better quality
    than that required by the standards, recognizing that the
    standards represent not optimum water quality but the worst
    we are prepared to tolerate
    if economic considerations so
    require.
    Part III contains water use designations.
    All waters are
    designated for general use except those in the restricted
    category, which has here been broadened in response to testimony
    to include waters whose flow is too low to ‘support aquatic
    life.
    This should relieve the burden of treatment beyond the
    effluent standards for discharges to intermittent streams.
    Such extra effort is difficult to justify when it will not
    result in a satisfactory ~quatic life because of insufficient
    flow.
    Since the publication of the proposed final draft
    we have also designated as restricted certain additional
    heavily industrial channels’ in the Chicago area.
    The evidence
    establishes that even with the most advanced treatment and with
    stormwater overflow control aquatic life standards for dissolved
    oxygen
    (and perhaps also ammonia) cannotbe met in portions of
    the Chicago River System, and that meeting the aquatic
    temperature standards in these same areas,
    as well as in
    the adjacent section of the Des Plaines River, would require
    cooling towers costing tens of millions of dollars and produce
    doubtful benefits in terms of stream improvements.
    In the case
    of the North Shore Channel, where the evidence is that an
    intermediate oxygen level
    is achievable, we have prescribed
    it.
    We urge the Metropolitan Sanitary District to give serious
    consideration to such further measures, including in—stream
    aeration, as many offer promise of improving the quality of
    its restricted use waters.
    Part IV.
    Several Rules
    in this Part were adopted January
    6.
    Rules 404 and 405, earlier postponed, are adopted today.
    404 Deoxygenating Wastes.
    This important section is an attempt,
    much modified in wording from that originally proposed, to
    restate the existing treatment requirements for BOD and suspended
    solids in a single document, with several deliberate changes.
    Th’e task
    is unfortunately compliôated by the fact that several
    different levels of secondary treatment are presently required
    for different waters and that new compliance dates must be set
    for any new requirements
    in order to allow time to build treatment
    works.

    —12—
    The basic requirement, which is close to that of existing
    law,
    is that all oxygen—demanding wastes shall meet standards
    of
    20 mg/i of BOD and 25 of suspended solids.
    As we said in
    our January
    6 opinion, prescribing the uniform use of readily
    available technology as a minimum serves to prevent local
    nuisances, to avoid premature exhaustion of assimilative
    capacity,
    and
    to further the established federal and state
    policy against degradation of clean water.
    As proposed by the Agency
    (#R7l-20), the July,
    1972 date
    for compliance on intrastate streams
    (SWB-l4)
    is made applicable
    to industry, as it was generally assumed to be before our
    decision in Borden Co.
    v.
    EPA, PCB 71-23
    (May 24,
    1971).
    Additional time
    is allowed for sources on certain rivers, in-
    cluding the Illinois and the Wabash, where present secondary
    requirements are somewhat more lenient,
    and for sources affected
    by the new dilution standard of Rule 401(a), but as in the
    case of the Mississippi River
    (#R 70—3, Jan.
    6,
    1971)
    ,
    the 20
    and 25 standards appear readily attainable and represent the
    minimum of acceptable treatment.
    An exception, however,
    allows
    slightly less efficient treatment for smaller fac~Llities in
    order to permit the use of trickling filters, which are relatively
    economical and efficient in the absence of sophisticated operation,
    except within the Metropolitan Sanitary District, where present
    law prescribes the 20 and 25 standard for all sources, presumably
    for the good reason that the density of sources
    is great enough
    to make large combined treatment facilities practicable and to
    discourage the use of less effective trickling filters.
    This
    exception also has precedent in our revised Mississippi River standard.
    The secondary treatment requirement,
    as noted above,
    is a
    minimum standard representing ordinary good practice.
    In some
    cases,
    as we said in our January 6 opinion,
    because of the low volume of the receiving stream or the
    large quantities of treated wastes discharged, meeting
    these
    (minimum)
    standards may not suffice to assure that
    the stream complies with water quaiity standards set on
    the basis of what is necessary to support various water
    uses.
    In such cases the very nature of water quality standards
    requires that additional measures be taken beyond those
    required by ordinary good practice to reduce further the
    discharge of contaminants to the stream.
    Treatment requirements beyond secondary are
    ‘based in
    substantial part upon this principle.
    Sanitary Water Board
    regulations, preserved by the Environmental Protection Act,
    require additional treatment as the ratio between stream flow
    and effluent volume
    (dilution ratio)
    becomes smaller.
    In general,
    BOD and solids effluent standards were set at 10 and
    12,
    respectively, for dilution ratios of less than
    2 to
    1 and at
    4 and
    5 for less than
    1 to
    1.

    —13—
    The basic principle of this scheme is preserved in the
    revised regulations, with several important changes.
    First,
    we require the best available treatment
    (BOD 4, solids
    5)
    for discharges to Lake Michigan, a high-quality body of water
    with low outflow rate that deserves maximum protection from
    possible contamination.
    The principal discharger to the
    Lake, the North Shore Sanitary District,
    is already committed
    to removing its effluents from the Lake altogether
    (see League
    of Women Voters v. NSSD,
    #
    70-7, March31 and June 26,
    1971).
    The additional requirement of similar treatment before discharge
    to other high—quality waters, proposed May
    12, is omitted
    for the time being pending identification of other waters
    entitled to such special protection.
    The other changes we have made in this Rule are based
    primarily upon careful testimony presented by Dr. John Pfeffer
    of the Institute for Environmental Quality with respect to the
    need for and costs
    of treatment beyond secondary.
    Dr. Pfeffer’s
    first point is that, given a base of secondary treatment,
    the increased capital and operating and maintenance costs
    for achieving the next level of treatment with polishing
    ponds or microstrainers are not significant.
    Therefore,
    the requirement for effluent from an activated sludge
    process to satisfy the BOD5 of 10 mg/l and organic suspended
    solids of 12 mg/i adds a relatively insignificant cost
    to wastewater treatment.
    This testimony is supported by the testimony of consulting
    engineer Hjalmar Sundin that tertiary filtration will achieve
    an effluent meeting the 10-12 standard, that the cost of such
    treatment is quite “reasonable”
    as compared with that necessary
    to meet 4—5,
    and that “the economic breakpoint favors
    a
    10 mg/i
    standard for BOD5”.
    See also the testimony of consulting
    engineer John Cormack with respect to the plants of the North
    Shore Sanitary District and filtration.
    With respect to the
    desirability of such treatment,
    Dr. Wesley Pipes urged the
    Board
    to extend the effluent requirements of 10 mg/l BOD and
    12 mg/i solids to all discharges having a dilution ratio
    of less than five to one in order to reduce the stream BOD
    and protect against alterations
    in stream biota toward
    species more tolerant of pollution.
    As in the proposed final
    draft, we accept Dr.
    Pipes’s suggestion because we believe
    the added protection worth the relatively small incremental
    cost of reducing effluents
    to this level when less than five
    volumes of dilution water are available.
    This revision did
    not raise much controversy.

    —14—
    Dr. Pfeffer’s second point, supported once again by
    Sundin and Cormack and by numerous representatives of municipal
    treatment works,
    is that the incremental cost of reducing effluents
    beyond the 10-12 standard to meet 4 mg/i of BOD and
    5 of solids
    is considerably greater.
    Moreover, he argues, in many cases
    these costs need not be incurred in order to maintain satisfactory
    stream quality.
    Using a modified from of the Streeter-Phelps
    equation, he demonstrates that, given certain conditions
    including
    a stream reaeration rate he says is not atypical for small streams
    with low dilution ratios, the dissolved oxygen standards we today
    set for aquatic life can often be met with effluents of
    10
    rather than
    4 mg/l of BUD even in the total absence of dilution.
    The large sums spent for the last drop of removal, he concludes,
    may be spent for no apparent benefit.
    That substantial sums
    may be at stake is clear from Cormack’s testimony that the North
    Shore Sanitary District can cut tertiary treatment costs at
    three plants
    from $11,000,000 to $3,000,000 by substituting
    filters under the Pfeffer proposal for the carbon absorption
    columns planned to meet the existing standard.
    This argument stands uncontradicted on the record insofar
    as it pertains to dissolved oxygen.
    Dr. Pipes correctly
    points out that oxygen is not the sole purpose of the effluent
    standards,
    as sludge banks can cause a shift toward more pollution—
    tolerant life forms.
    Dr. Pfeffer responds that an effluent
    containing as
    little as 12 mg/i of suspended solids, finely
    divided and not readily settleable,
    should not result in sludge
    banks detrimental to aquatic life.
    Dr. Pfeffer’s recommendation, based on his above testimony,
    is that relief from the dilution-ratio requirement of
    4 mg/i
    BUD and
    5 of solids be provided upon proof in the indiv’thdual
    case that stream standards for oxygen will not be violated.
    The
    Agency agrees.
    With modifications noted below, we adopt this
    recommendation.
    The purpose of treatment requirements beyond
    secondary is to assure satisfactory stream quality, not to impose an
    acceptable minimum of uniform treatment.
    The dilution ratio is a
    very rough guide to the necessity for such treatment.
    Based as
    it
    is upon the single relevant factor of available dilution water,
    it overlooks both the critical rate at which the stream
    accepts additional oxygen from the air and the important question
    of BUD concentration in. the water that is to be used for dilution.
    For the relatively inexpensive increment to a 10-12 standard,
    and as
    an indicator of the need for proof that stream standards
    can be met without the expense of a 4-5 effluent, the dilution
    ratio is
    a useful tool.
    But, like standard emission factors
    in proof of air contaminant emissions, the naked dilution ratio
    should not automatically result in enormous expenditures for
    the best level of treatment if it can be shown that the water
    quality standards can be met at considerably less cost.

    —15—
    This conclusion is the more compelling in light of the
    fact that for many communities completion of facilities to
    achieve the 4-5 standard will by no means exhaust the need for
    water pollution control spending or assure that water quality
    standards will be met.
    As Dr. Pfeffer points out, the BUD5
    test principally measures the carbonaceous BUD and ignores
    the often delayed but eventual oxygen dernend exerted by ammonia,
    to which we have directed
    our
    attention in the regulations
    adopted January
    6.
    The ultimate nitrogenous oxygen demand of
    a waste containing a normal 20 mg/i of ammonia
    (measured as
    nitrogen)
    is 91 mg/i, nine times the carbonaceous BUD remaining
    after treatment to an effluent of
    10 mg/i.
    We agree with Dr.
    Pfeffer that it makes little sense to
    spend money reducing
    carbonaceous BUD from 10
    to
    4 if the much greater nitrogenous
    demand is ignored.
    The State Water Survey has already found
    that oxygen standards in the Illinois River will not be met,
    even with advanced treatment, unless ammonia is oxidized be-
    fore discharge in the largest plants.
    The same may be true
    in other streams.
    Inherent in Dr. Pfeffer’s proposal,
    as
    several witnesses representing municipal dischargers expressly
    agreed,
    is that a considerable number of plants may be required
    to do something about ammonia in addition to those already subject
    to the January
    6 effluent standards.
    Moreover, even if
    ammonia’s oxygen demand is not exerted until sufficient
    dilution water downstream is available to protect stream oxygen,
    the ammonia itself may be toxic to fish and require treatment
    on that basis.
    Further, it is clear from the evidence that
    discharges from combined sewer overflows in many parts of the
    State may make it impossible to achieve the water quality standards
    even with the best available treatment at the plant.
    In short, there may be higher priorities for water pollution
    control
    in many communities than the need for an effluent of
    4 mg/i of BUD and
    5 of suspended solids.
    Donald Matchke of the
    Cook County Clean Streams Committee and the Izaak Walton League,
    voicing the thoughts of a conservationist, expressed in an
    early hearing a concern over exactly this question of priorities,
    fearing lest the existing Sanitary Water Board requirements
    leave us with many expensive treatment plants and unsatisfactory
    waters:
    We have to grapple with the gross problems that are
    contributing gross problems to the stream.
    These
    are the combined storm water and combined sewer overflows,
    and also the solids that escape from a treatment plant.
    .
    These are two main significant problems which seems to me
    they ought to be tops with us
    as far
    as solving rather
    than going for 98 percent treatment or four or five parts
    BUD as ultimate treatment in small receiving water courses.

    —16—
    My one recommendation for tertiary treatment, outside of
    your own, which is nitrogen and phosphorus removal, plus
    chlorination, would be filtration of effluent because
    this contributes to a bottom sedimentation problem that
    is
    a common problem from one end of the state to the other.
    It is something that we can do relatively economically.
    We will take a BUD credit for doing it.
    .
    .
    .
    We have
    to
    grapple with the main problem, uncontrolled discharges
    of storm water and combined sewer overflows.
    Otherwise
    we are going to spend a great deal of money in the next five
    years and the tertiary treatment,
    and the comment made
    earlier, going to apply, there is going to be no benefit
    seen.
    The rivers are going to look just as bad unless we
    choose the priorities.
    They will look just as bad after
    tertiary treatment goes
    in.
    There
    is always the contention that all of the suggested things
    should be done, that money is
    no’,
    object.
    But in light of the
    notorious difficulties of municipalities in raisins
    enough
    money to finance the most necessary treatment projects,
    as well
    as the general undesirability of wasting money, we think it
    appropriate to reorder our priorities somewhat along the lines
    suggested by Mr. Matchke in order that limited funds will provide
    the maximum benefit in terms of actual stream improvement.
    Accordingly, we have provided an exception from the effluent
    standard of
    4 mg/i BUD and
    5
    solids, upon proof that an effluent
    of 10 and 12 will suffice to achieve compliance with all
    applicable water quality standards.
    The burden is on the
    discharger to make that proof or to meet the stricter standard.
    Other sources discharging to the same stream must be taken
    into account, although the applicant is entitled to assume
    that others will bring themselves into compliance with their
    own effluent standards.
    We require proof that undesirable
    bottom deposits will not be caused, to satisfy the most serious
    question raised by Dr. Pipes; and that~aprogra ~of ammo~•~niacontrol
    and of combined—sewer overflow control, where necessary, be
    provided at the time of applying for an exemption.
    What the
    new rule says
    is that it is the discharger’s obligation to
    achieve satisfactory stream’ quality; he should demonstrate
    to the Agency how that is
    to be done.
    The exemption does not apply to the three huge plants of
    the Metropolitan Sanitary District of Greater Chicago.
    Dr.
    Pfeffer and his committee agreed it should not; the District
    itself testified to the enormous population equivalent load

    —17—
    discharged from those plants even after a high level of treat-
    ment; and sophisticated models presented by the District and
    others demonstrate that dissolved oxygen in the receiving
    streams cannot meet the
    6 mg/i level even if the best treat-
    ment
    is provided.
    We cannot under the circumstances be content
    with less than the best in hopes that someday these channels
    may be upgraded to the status of an asset rather than a
    liability.
    Nor does the exception apply to Lake Michigan,
    where the high treatment requirement is imposed to protect
    the pristine esthetic quality of a special body of water.
    An additional revision is based upon testimony that the
    present effluent requirements for low—flow streams
    (less than
    1
    to
    1
    ratio) effectivelyprohibit use of three—stage lagoons,
    which
    according
    to
    ‘the
    Institute
    are
    the
    most
    dependable,
    economically
    reasonable
    method
    of
    .advanced
    treatment
    for
    small
    communities that cannot afford expensive operators.
    Moreover,
    the lagoons
    are said to achieve a satisfactory reduction of
    the original sewage contaminants; mudh of what goes into the
    stre:axn is likely to be algae.
    We have agreed’ to allow such
    lagoons ‘in small communities
    to exceed
    th’e tighter effluent
    standards so long as water quality standards are met.
    The timetables for compliance with this Rule are necessarily
    somewhat complex,
    as they attempt to adopt some existing dead-
    lines and to prescribe new ones where new treatment require-
    ments’ are imposed.
    No simplification appears practicable
    without either relaxing existing deadlines or giving
    insufficient time to meet new requirements.
    Individual time-
    tables in the present regulations, many of which required compliance
    before now, are preserved by reference as the basis for en—
    forcement purposes.
    The July,
    1972 date set for secondary
    treatment on intrastate streams jrest~ted~
    The
    December,
    1973 ~.aterecently set for
    secondary treatment on the M~ssassippi~Rive~ris rata~ned,
    as is the 1977 date for advanced treatment ~inthe ~la-rg~
    plants of the Metropolitan Sanitary i~astrict
    2Yhree years,
    a re~asonab1~
    ‘pei’iod accoid.ng to ~therecord in the
    Mississippi ~,ivercase
    (R 70-3), i~~alibwediformeeting all
    new
    requir~meflt$
    We
    have
    allowed
    until
    December
    31,
    1973
    for
    compliance
    with
    most existing requirements for treatment beyond secondary.
    In
    many cases the original deadline was July, 1972, but according
    to Director Blaser of the Agency most communities have fallen
    behind that schedule, in large part because of the unavailability
    of federal aid funds.
    We have held that the absence of federal
    money is no excuse for disobeying the law, and we would not
    extend the deadline merely because people have missed it.

    —18—
    But we have already had several occasions, e.g., EPA v. City
    of
    Marion,
    #71-25
    (Oct.
    28,
    1971),
    to
    observe
    that
    a
    new
    EPA
    technical
    release
    issue
    in
    the
    summer
    of
    1971,
    just
    as
    a
    number
    of communities had prepared their plant for supplemental
    treatment,
    took many people by surprise in requirment the removal
    of algae from polishing lagoon effluent in order to assure
    meeting
    the
    effluent
    standards.
    On
    the
    basis
    of
    this
    surprise
    we
    have
    granted
    variances
    permitting
    six
    months’
    to
    a
    year’s
    extension
    of
    the
    1972
    deadline
    for
    communities
    forced
    to
    draft
    new
    plans
    in
    midstream
    by
    this
    new
    policy,
    as
    in
    the
    Marion
    case
    itself.
    Moreover,
    our
    acceptance
    of
    Dr.
    Pfeffer’s
    revised
    effluent
    standard
    permitting
    individual
    evaluation
    of
    the
    need
    to
    go
    beyond
    10
    mg/i
    of
    BUD
    and
    12
    of
    solids,
    if
    it
    is
    to
    be
    meaningful,
    must
    include
    a
    brief
    period
    of
    time
    in
    which communities
    affected
    may
    find
    out
    and
    demonstrate
    whether
    or
    not
    they
    can
    take
    advantage
    of
    the
    revised
    standard.
    We
    therefore
    allow
    until
    Sept.
    1,
    1972
    for
    the
    submission
    of
    a
    program
    for
    achieving
    compliance,
    which
    must
    be
    approved
    by
    the
    Agency,
    and
    until
    the
    end
    of
    1973
    to
    complete
    construction.
    Because
    the
    communities
    affected
    are
    those
    previously
    under
    a
    1972
    deadline,
    we
    do
    not
    believe
    so
    much
    lead
    time
    is
    required
    as
    in
    the
    case
    of
    starting
    from
    scratch
    with
    a
    more
    stringent
    requirement,
    for
    which
    financial
    arrangements
    must
    be
    made.
    The
    Marion
    case
    gives
    some
    indication
    of
    the
    time
    that
    may
    be
    required
    to
    adjust
    to
    some
    of
    the
    changes
    made.
    The
    fact
    that
    six
    months’
    delay
    in
    treatment
    plant
    completion
    may
    result
    from
    adoption
    of
    the
    Pfeffer
    proposal
    we
    do
    not
    be-
    lieve
    to
    be
    reason
    enough
    for
    blazing
    full
    stream
    ahead
    on
    what
    may
    be
    a
    wrong
    course.
    The
    saving
    of
    money
    for
    more
    important
    uses,
    the
    more
    rapid
    attention
    to
    the
    critical
    problems
    of
    combined
    sewers
    and
    ammonia,
    and
    the
    fact
    that
    most
    communities
    were
    in
    default
    of
    the
    old
    deadlines
    all
    militate
    against
    keeping
    the
    old
    rules.
    In
    fact
    we
    suspect
    the
    December
    1973
    date
    is
    not
    far
    from
    when
    many
    cummunities
    would
    actually
    have
    complied
    with
    the
    old
    rules;
    retaining
    the
    paper
    requirement
    of
    July
    1972
    would
    not
    mean
    compliance
    by
    that
    date.
    If
    a
    more
    substantial
    delay
    were
    at
    issue,
    we
    should
    be
    likely
    to
    reject
    the
    Pfeffer
    proposal.
    Better
    a
    plant
    that
    is
    more
    costly
    than
    necessary
    than
    continued
    pollution.
    Six
    months’
    delay
    we
    can
    justify.
    But
    anyone
    who
    cannot
    prove
    his
    case
    for
    an
    exemption
    in
    that
    time
    should
    go
    ahead
    and
    build
    to
    meet
    the
    more
    stringent
    standard.
    We
    need
    hardly
    say
    that
    the
    slippage
    in
    this
    program
    that
    makes
    that
    statement
    possible
    is
    a
    cause
    for
    grave
    concern,
    as
    we
    have
    pointed
    out
    in
    numerous
    opinions,
    e.g.,
    City
    of
    Mattoon
    v.
    EPA,
    #71-8
    (April
    14,
    1971),
    and
    that
    it
    must
    not
    be
    permitted
    to
    happen
    again.
    We
    set
    new
    dates
    because
    we
    have
    set
    new
    requirements,
    not
    because
    local
    officials
    have
    chosen
    to
    disobey
    the
    law.
    We
    will
    not
    tolerate
    a
    similar
    slippage

    —19—
    under the revised program.
    Substantial money penalties,
    as well
    as
    prohibition
    of
    additional
    connections,
    are
    a
    distinct
    possibility
    for communities that do not make diligent efforts to meet the new
    deadlines.
    Paragraph
    (c)
    provides for averaging in accordance with the
    suggestion of the State Water Survey, based upon actual treatment
    plant observations under good operation.
    405 Bacteria.
    Summer disinfection of bacterially contaminated
    effluents by various dates no later than July 1,
    1972, has been
    required by the regulations
    for some time, with varying compliance
    dates and with more stringent requirements for discharges to
    waters designated for primary contact
    (swimming).
    The dangers
    of germs are also present to those who go to the waters
    for various purposes in winter, and the lower level prescribed
    for primary contact should be readily achievable wherever
    disinfection is practiced.
    The additional safety seems well
    worth the additional cost in chemicals.
    Part V imposes reporting requirements similar to those of
    present
    law (SWB-6).
    Small changes have been made to provide that expensive
    monitoring need not be done for contaminants not likely to be found
    in an effluent.
    Access for Agency testing
    is requ±r~ed.The Agency
    asks us to add
    a requirement that records be kept.
    We invite a
    proposal for amendment to this effect on which a hearing may be
    held,
    as the suggestion was received too late to allow public comment.
    Part VI.
    Rule 601, dealing with breakdowns and spills, was a
    adopted
    January
    6.
    602 Combined Sewers and Treatment Plant Bypasses.
    It is
    generally acknowledged that one of the most serious water
    pollution
    problems
    throughout
    Illinois
    is
    that
    resulting
    from
    sewage flows far in excess of treatment or even sewer capacity
    during wet weather.
    Solution of this problem is necessary if
    all our other regulations are to result in visible improve-
    ment of water quality.
    Methods exist for capturing various
    levels of storm flows and of giving them various levels of
    storm
    flows
    and
    of
    giving
    them various levels of treatment,
    some of the more sophisticated of which were described by Mr.
    Bryan of Rex Chainbelt at our Alton hearing.
    One plainly avail-
    able solution, which
    is being put into effect by the North Shore
    Sanitary District,
    is retention of overflows for later routing
    through the regular treatment plant for complete treatment to meet
    the effluent standards.
    Occasional flows too large to be held al-
    together will be given primary treatment and disinfection before
    discharge.
    See League of Women Voters v. North Shore Sanitary Dis-
    trict,
    #70—7, March 31 and June
    26,
    1971).
    A number of wet—weather
    control programs of other communities, many of them quite im-
    pressive, were described at length in the record.
    Our
    initial
    proposal
    would
    have
    required
    that
    all
    such
    flows
    be treated to meet the effluent standards.
    The evidence is
    strong
    that the costs of complete treatment climb sharply and the benefits

    —20—
    fall off rapidly if control of the hundred-year storm is
    contemplated.
    Both the degree of treatment and the percentage
    of flow that should be treated are matters that we cannot
    determine across the board on the present record without
    regard to the needs of individual streams,
    and therefore we
    have
    modified
    the
    proposal.
    What we adopt today is
    a restatement of existing law, which
    requires control of pollution from combined sewer overflows
    and treatment plant bypasses.
    The degree of treatment required
    and the amount of flow that must be captured are left to case-
    by-case determination by the Agency subject to certain guide-
    lines
    based largely upon prior Agency interpretation of present
    law.
    The
    very
    poliutionai
    “first
    flush,”
    which
    the
    Agency
    is
    to define in each case according to the facts, must be given
    full treatment; at least ten times the dry weather flow must
    receive primary treatment and disinfection; and the Agency
    is to require such further treatment as may be necessary to
    prevent violation of water quality standards.
    Since this
    is
    essentially what was required by existing law to be done as
    to bypasses at the treatment plant itself at the same time
    the plant is upgraded to meet the BUD and solids effluent
    standards, we retain the requirement that treatment plant
    bypasses be corrected at the same time the plant itself is
    improved under Rule 404.
    Our original reading of the old
    regulations was that this same deadline applied to combined
    sewer overflow points distant from the treatment plant, but the
    Agency’s interpretation, confirmed by a Sanitary Water Board
    communication to affected communities when the rules were first
    adopted, was that sewer overflows away from the plant were to
    be corrected “within ten years,” or about 1977 or 1978.
    The
    Agency asks us to keep that distant date.
    We recognize that those who relied in good faith on the more
    distant official interpretation cannot be penalized or expected
    to manage this difficult construction job within the next
    year and a half, much less by July 1972,
    as would be required
    if we adhered to our initial interpretation.
    We recognize
    the necessity to arrange for new financing in many cases and
    the logistic problems of constructing control facilities at
    numerous overflow points,
    some of them in highly congested
    areas, as was illustrated by the testimony of the City of Joliet.
    We also are aware that until the combined sewer problem is
    solved the waters will not be fit to use.
    There are several
    instances in the record of communities
    that, despite the late
    deadline, are already well on their way toward solution of
    their combined sewer problem.
    Our adoption of the Pfeffer
    standard for plant effluents should free up some funds already
    budgeted for use in dealing with overflows.
    We believe on
    the whole we can expect communities
    to achieve this control by
    the end of 1975, which allows over three and a half years.
    The

    —21—
    Metropolitan
    Sanitary
    District of Greater Chicago, which has
    a very large. and very special problem, has demonstrated its
    need for somewhat longer period, but even as to that District
    we do not think it proper to extend the deadline beyond that
    originally set by the Sanitary Water Board.
    Four years have
    passed since the ten—year deadline was set, and the District
    is still
    in the planning stage.
    It is time something happened.
    Rule 603 requires new sources to exercise care to limit
    damage to organisms that might otherwise be drawn into its
    intakes.
    An earlier provision limiting the percentage of a
    body of water that may be drawn through the condensers of
    new power plants or other
    like installations, in order to pro-
    tect small aquatic life, has been deleted for want of evidence
    in the present record as to its reasonableness,
    as the Agency
    recoinntends.
    Rule 604 on new connections to overloaded plants
    is being
    considered separately in #R 71-19.
    Part VII contains minimum limits on discharges to sewers,
    designed to protect treatment works against harm that might
    cause violations of the effluent or water quality standards.
    We have added language suggested by Dr.
    Pipes to protect
    against hazards to sewage plant personnel and against the
    discharge of materials that will go through the plant without
    treatment and cause effluent violations.
    While local ordinances
    often provide for similar protection,
    one Sanitary District
    official pointed to the ineffectiveness of local enforcement
    and to the need for a state regulation.
    The ~tercurylimits of existing law (#R 70—5)
    are also in-
    cluded in this Part.
    We have also, with the concurrence of
    the Agency, modified the existing limit for cyanide discharges to
    sewers
    (SWB-5)
    to conform with the applicable ordinance of the
    Metropolitan Sanitary District.
    The limit of
    2 mg/i of free
    cyanide is adequate on the record to protect sewer workmen;
    the requirement of proof that the treatment plant can handle
    the discharge
    is necessary and adequate to protect the receiving
    stream.
    We are asked to allow the permit to be sought by the
    discharger rather than by the local government, but the consent
    of the plant operator is essential.
    The evidence regarding
    Rockford shows this safeguard is workable in practice.
    Part VIII incorporates existing requirements
    (SWB—i9)
    for dis-
    charges of wastes from watercraft, with a new section requir-
    ing bilge or ballast discharges to meet general effluent
    standards.
    Special new provisions for better enforcement of
    the boating regulation are omitted for lack of adequate support-
    ing evidence at present and may be considered separately in
    further hearings.

    —22—
    Part
    IX:
    Permits.
    As in earlier drafts,
    this part requires
    permits for existing and proposed effluent sources, both as
    an enforcement device and as a source of necessary information
    on which to base such important matters as future basin studies.
    Permits are to be issued only upon a showing of compliance with
    the law or the existence of a variance.
    Compliance with the law
    requires not only meeting the effluent standards but also a
    showing that the water quality standards of the receiving
    stream will not be jeopardized and that the nondegradation policy
    of federal and state law is not impaired.
    We have accepted in large part the detailed language
    submitted by the Agency, which as administrator of the permit
    program has
    an intimate view of its own procedural needs.
    This language closely resembles that proposed for air pollution
    in #R 7i-23.
    We have revised the Agency version to allow
    for limited testing under a construction permit;
    to require
    Agency notification if an application is incomplete; to allow
    permits where
    a varinace has been granted; to omit the require-
    ment of a bond;
    to leave the question of action under a permit
    pending appeal of a condition to individual cases; to require
    publication of new as well as revised design criteria;
    to
    provide for revocation by complaint rather than by Agency
    notice alone; and to eliminate the requirement of Board
    approval for Agency procedural rules.
    Part X.
    Implementation Plan.
    This part requires the submission
    of programs for compliance by individual sources subject to
    new effluent limitations, by analogy to the practice of the old
    Air Pollution Control Board.
    This proposal has been generally
    applauded.
    Schedules may be approved by the Agency only
    if they
    conform to the timetables specified in the regulations and if
    the program appears adequate to achieve compliance.
    Programs must be filed by July 1,
    1972 to meet certain
    effluent standards adopted January
    6; by September
    1,
    1972,
    in
    other
    cases
    in
    which
    compliance
    is
    due
    at
    the
    end
    of
    1973;
    and by December 31, 1972 for later compliance dates.
    Interim
    dates
    for
    progress
    toward
    compliance
    are
    left
    to
    the
    individual
    case.
    Failure
    to
    adhere
    to
    an approved program is a violation
    for
    which
    penalties
    may
    be
    imposed.
    Rule
    1001
    is
    the
    requirement
    of
    an
    annual
    status
    report
    from
    the
    Agency as proposed May 12.
    The extensive list of individual
    compliance
    dates,
    taken
    from
    existing
    regulations,
    is
    omitted.
    In
    most
    cases
    those
    dates
    are
    past;
    for
    enforcement
    purposes
    the
    original
    regulations
    may
    be
    used,
    and
    the
    presently
    applicable
    dates
    are
    more
    concisely
    stated
    in
    Part
    IV.

    ORDER
    1.
    CHAPTER
    4 of the Rules
    and Regulations of the Pollution
    Control
    Board,
    entitled
    “Water
    Pollution,”
    is
    hereby
    designated
    as Chapter
    3.
    2.
    The following new provisions are hereby added to the Rules
    and Regulations of the Illinois Pollution Control Board:
    ILLINOIS POLLUTION CONTROL’ BOARD
    RULES AND REGULATIONS
    CHAPTER 3:
    WATER POLLUTION
    PART
    I:
    INTRODUCTION
    101
    Authority.
    Pursuant
    to
    the
    authority
    contained
    in
    Section
    13
    of
    the
    Environmental Protection Act, which authorizes the Board
    to issue regulations “to restore, maintain, and enhance
    the purity of the waters of this State in order to protect
    health, welfare,
    property, and the quality of
    life, and to
    assure that no contaminants
    ar,e discharged into the waters
    without
    being given the degree of treatment or control
    necessary to prevent pollution”,
    and to adopt water quality
    standards, effluent standards, standards for the issuance
    of permits, standards for the certification of sewage
    works operators, standards relating to water pollution
    episodes or emergencies, and requirements for the inspection
    of pollution sources and for monitoring the aquatic
    environment, the Board adopts the following rules and
    regulations.
    102
    Policy.
    The
    General
    Assembly
    has
    found
    that
    water
    pollution
    “constitutes
    a menace to public health and welfare,
    creates
    public nuisances,
    is harmful to wildlife,
    fish, and aquatic
    life, impairs domestic,
    agricultural,’ industrial,
    recreational, and other legitimate beneficial uses of water,
    depresses property values,
    and offends the senses.”

    —2—
    It is the purpose of these rules and regulations to designate
    the
    uses
    for
    which
    the
    various
    waters
    of
    the
    State
    shall be maintained and protected; to prescribe the
    water
    quality
    standards
    required
    to
    sustain
    the
    designated
    uses; to establish effluent standards to limit the con-
    taminants discharged to the waters;
    and to prescribe
    additional regulations necessary for implementing,
    achieving and maintaining the prescribed water quality.
    These
    regulations
    were
    developed
    in
    close
    cooperation
    with
    the
    Federal
    Environmental
    Protection
    Agency
    in
    order
    that, consistent with Illinois law, they may also serve
    the
    purposes
    of
    the
    Federal
    Water
    Pollution
    Control
    Act.
    103
    Repeais.
    These rules and regulations replace and supersede Rules
    and Regulations SWB-l, SWB-5 through SWB-l5, and SWB-l9,
    adopted by the Illinois Sanitary Water Board and continued
    in effect by Section 49
    (c)
    of the Environmental Protection
    Act “Until repealed, amended,
    or superseded
    by’ regulations
    under this Act.”
    Accordingly Rules and Regulations SWB-l,
    SWB-5 through SWB-15,a~ndSWB-l9 are hereby repealed,
    except that any proceeding arising from any act committed
    before the effective date of the applicable provision of
    this Chapter shall be governed by the above listed
    regulations.
    104
    Definitions.
    As used in this Chapter, the following
    terms shall have the meanings specified
    See
    additional
    definitions adopted Jan.
    6,
    1972:
    “Aquatic Life” means native populations of fish and other
    aquatic life;
    JLDj1utjoflRatjo~~meaflstheratio of the seven-day,
    once
    in”ten.years low flow of the receiving stream to the
    average dry weather flow of,the treatment works
    for the
    desi~n‘year.
    “Institute” means the Illinois Institute for Environmental
    Quality.;
    “Jnterstate Waters” are all waters which cross or form
    part of’the~borderbetweenIllinois and other states;
    “Intrastate Waters” are au
    the waters of Illinois which
    are not interstate waters;
    “Marine Toilet” means any toilet on or within any water-
    craft;

    —3—
    “Modification” means
    1)
    Any physical change
    in a treatment works which
    involves
    different
    or
    additional
    processes
    or
    equipment
    or
    which
    increases
    or
    decreases
    the
    capacity or efficiency of the treatment works;
    or
    2)
    any
    change
    in
    the
    number
    or
    location
    of
    points
    where effluent is discharged, directly or indirect-
    ly, to the waters; or
    3)
    any
    change
    in
    any
    components
    of
    a
    sewer
    system
    which alters the quantity of wastewater capable of
    being
    conveyed,
    or
    which
    increases
    or
    decreases
    the
    quantity
    of
    wastewater
    capable
    of
    being
    discharged
    at
    overflow
    or
    bypass
    structures;
    or
    4)
    any increase in quantity or strength of a dis-
    charge from any wastewater source, unless such
    increase does not exceed an upper limit
    specifically allowed by an existing Permit granted
    by the Agency and does not involve any additional
    contaminants contained in standards set by this
    Chapter that are not itemized and approved in
    an
    existing
    Agency
    permit.
    “Population Equivalent”
    is a term used to evaluate the
    impact of industrial or other waste on
    a treatment works
    or stream.
    One population equivalent is
    1,00 gallons of sewage
    per
    day,
    containing
    0.17
    pounds
    of
    BOD5
    and
    0.20:pounds
    of
    suspended solids.
    The impact on a treatment works
    is
    evaluated
    as
    the
    equivalent
    of
    the
    highest
    of
    the
    three
    parameters.
    Impact on a stream is the higher of the BUD5
    and suspended solids parameters;
    “Primary
    Contact”
    means
    any
    recreational
    or
    other
    water
    use
    in
    which
    there
    is
    prolonged
    and
    intimate
    contact
    with the water involving considerable risk of ingesting
    water
    in quantities sufficient to pose
    a significant
    health hazard,
    such as swimming and water skiing;
    “Public
    and
    Food
    Processing
    Water
    Supply”
    means
    any
    water
    use
    in
    which
    water
    is
    withdrawn
    from
    surface
    waters
    of
    the State for human consumption or for processing of
    food
    products
    intended
    for
    human
    consumption;

    —4—
    “Restricted Use” means certain designated waters which
    are not protected for aquatic life;
    “Secondary Contact” means any recreational or other
    water use in which contact with the water is either
    incidental
    or accidental and in which the probability
    of ingesting appreciable quantities of water is minimal,
    such as fishing, commercial and recreational boating and,
    any limited contact incident to shoreline activity;
    “Underground Waters” means any waters of the State
    located beneath the surface of the earth;
    “Watercraft” means every type of boat, ship:or barge
    used or capable of being used as
    a means of transportation
    on water.
    105
    Analytical Testing
    (:~‘optedJanuary 6,
    1972)’.
    PART
    II.
    WATER QUALITY STANDARDS
    This part of the rules and regulations concerning water pollution
    describes the water quality standards that must be met to
    maintain the specified beneficial uses.
    References
    to STORET
    numbers
    identify
    the
    specific
    parameter
    as
    defined
    in
    the
    STORET
    system Handbook published by the Federal Environmental Protection
    Agency.
    201
    Mixing Zones.
    (a)
    In the application of any of the rulesand regulations
    in this Chapter, whenever a water quality standard
    is more restrictive than its corresponding effluent
    standard then an opportunity shall be allowed £or
    the mixture of an effluent with its receiving waters.
    Water quality standards must be met at every point
    outside of the mixing
    zone.
    The size of the mixing
    zone cannot be uniformly prescribed.
    The governing
    principle
    is that the proportion of any body of water
    or segment thereof within mixing zones must be quite
    small if the water quality standards are to have any
    meaning.
    This principle shall be applied on a case—
    by—case basis to ensure that neither any individual

    —5—
    source nor the aggregate of sources
    shall cause
    excessive
    zones
    to exceed the standards.
    The water
    quality standards must be met in the bulk of the
    body
    of
    water,
    and
    no
    body
    of
    water
    may
    be
    used
    totally
    as
    a
    mixing
    zone
    for
    a
    single
    outfall
    or
    combination
    of outfails.
    Moreover,
    except as otherwise provided
    in
    thdLs Chapter, no single mixing zone shall ex-
    ceed the area of a circle with a radius of 600
    feet.
    Single sources of effluents which have more
    than one outfall shall be limited to a total mixing
    area no larger than that allowable if
    a single out-
    fall were used.
    In determining the size of the mixing zone
    for any ~ischarge,
    the following must be considered:
    1.
    The character of the body of water,
    2.
    the~presentand
    anticipated
    future
    use
    of
    body
    of
    water,
    3
    the present and anticipated water quality of
    the body of water,
    4.
    the effect of the discharge on the pre-
    sent and anticipated future water quality,
    5.
    the dilution ratio,
    and
    6.
    the nature
    of the contaminant.
    (b)
    In addition to the above, for waters designated
    for aquatic life
    (General Standards)
    ,
    the mixing zone
    shall be so designed as
    to assure a reasonable zone
    of passage fOr aquatic life in which the water quality
    standards are met.
    The mixing zone shall not inter-
    sect any area of any such waters
    in such a manner
    that the maintenance of aquatic life in the
    body of water as.a whole would be adversely
    affected.

    —6—
    202
    Stream
    Flows.
    Except as otherwise provided in this Chapter with respect
    to temperature, the water quality standards in this Part
    shall apply at all times except during periods when flows
    are
    less
    than
    the
    average
    minimum
    seven
    day
    low
    flow
    which occurs once
    in ten years.
    203
    General Standards.
    The General Standards listed below will protect the State’s
    water for aquatic life,
    agricultural use, primary and
    secondary contact use, and most industrial uses, and en-
    sure the aesthetic quality of the State’s aquatic environment.
    Except as otherwise provided in this Chapter, all waters
    of the State shall meet the following standards:
    (a)
    Freedom frOm unnatural sludge or bottom deposits,
    floating debris, visible oil, odor, unnatural
    plant or algal growth, unnatural color or turbidity,
    or matter in concentrations
    or combinations toxic
    or harmful to human, animal, plant or aquatic life
    of other than natural origin.
    (b)
    pH (STURET number
    -
    00400)
    shall be within the range
    of 6.5
    to 9.0 except for natural causes.
    Cc)
    Phosphorus
    (STURET number
    -
    00665):
    Phosphorus as
    P shall not exceed 0.05 mg/i in any reservoir or
    lake,
    or in
    any stream at the point.where it enters any reservoir or lake.
    (d)
    Dissolved oxygen
    (STORET number
    -
    00300)
    shall not
    be less than 6.0 mg/l during at least 16 hours of
    any 24 hour period, nor less than 5.0 mg/i at any
    time.
    (e)
    Radioactivity:
    Cl)
    Gross beta
    (STORET number
    03501) concentration
    shall not exceed 100 pico curies per liter
    (pCi/l).
    (2)
    Concentrations of radium 226
    (STORET number
    09501)
    and strontium 90
    (STORET number
    13501)
    shall
    not exceed
    1 and 2 pica curies per liter respectiv’~
    (f)
    The following levels of chemical constituents
    sL~i
    not be exceeded:

    —7—
    CONSTITUENT
    STORET NUMBER
    CONCENTRATION
    (mg/i)
    P~nimonia Nitrogen
    (as
    N)
    Arsenic
    (total)
    Barium
    (total)
    Boron
    (total)
    Cadmium
    (total)
    Chloride
    Chromium
    (total hexavalent)
    Chromium
    (total trivalent)
    Copper
    (total)
    Cyanide
    Fluoride
    Iron
    (total)
    Lead
    (total)
    Manganese
    (total)
    Mercury
    Nickel
    (total)
    Phenols
    Selenium
    (total)
    Silver
    (total)
    Sulfate
    Total Dissolved Solids
    Zinc
    00610
    01000
    01005
    01020
    01025
    00940
    01040
    00720
    00950
    01046
    01049
    01055
    71900
    01065
    32730
    01145
    01075
    00945
    00515
    01090
    1.5
    1.0
    5.0
    1.0
    0.05
    500.
    0.05
    1.0
    0.02
    0.025
    1.4
    1.0
    0.1
    1.0
    0.0005
    1.0
    0.1
    1.0
    0
    .
    005
    500.
    1000.
    1.0
    (g)
    Based on a minimum of five samples taken over not more than a 30-day
    period, fecal coliforms
    (STORET number
    -
    31616)
    shall
    not
    exceed
    a geometric mean of
    200 per 100 ml, nor shall more than 10
    of the samples during any 30-day period,exceed 400 per 100 ml.
    (h)
    Any
    substance toxic to aquatic life shall not exceed one-tenth
    of the 48-hour median tolerance limit
    (48-hr.
    TLm)
    for native
    fish or essentiai,fish food organisms.
    (i)
    Temperature
    (STORET numbers (F°) 00011 and (C°)00010):
    (1)
    There shall be no abnormal temperature changes that may
    adversely affect aquatic’ life unless caused by natural
    conditions.
    (2)
    The normal daily and seasonal temperature fluctuations
    that existed before the addition of heat due to other
    than
    natural
    causes
    shall
    be
    maintained.
    (3)
    The maximum temperature rise above natural temperatures
    shall not exceed 5°F.

    —8—
    (4)
    In addition, the water temperature at representative
    locations in the main river shall not exceed the
    maximum limits in the following table during
    more than one percent of
    the hours in the 12—
    month period ending with any month.
    Moreover,
    at
    no time shall the water temperature at such
    locations exceed the maximum limits in the follow-
    ing table by more than 3°F.
    JAN.
    FEB. MAR.
    APR.
    MAY JUNE JULY AUG.
    SEPT. OCT._NOV. DEC
    Mississip-
    pi River
    (Wisc.
    Border to Iowa
    Border)
    (°F)
    Mississippi
    River
    (Iowa
    Border to Alton
    Lock and Dam)
    (°F)
    Mississippi
    River
    (So.
    of
    Alton Lock
    & Dam) (°F)
    45° 45° 57° 68° 78°85° 86° 86°
    850
    75° 65° 52°
    45°
    45°
    57°
    68°
    780
    86°
    880
    88° 86°
    750
    65°
    52°
    500
    50° 60° 70°
    800
    870
    89°
    89°
    87°
    78°
    70°
    570
    Ohio River
    (°F)
    50° 50° 60° 70° 80°8~°
    890
    89°
    870
    78°
    700
    570
    Wabash River
    & Its in-
    terstate
    Tributaries
    (°F)
    50° 50° 60° 70° 80°90~ 90°
    900
    90°
    78°
    70°
    57°
    Other Waters (°F)
    60°
    600
    600
    90°
    900
    90°
    90°
    90°
    90°
    9(~0
    90°
    60°
    Main river temperatures are temperatures
    of those portions
    river essentially similar to and following the same thermal
    regime as the temperatures
    of the main flow of the river.
    of the
    (5)
    The owner or operator of
    a source of heated
    effluent which discharges 0.5 billion British
    thermal units per hour or more shall demonstrate
    in a hearing before this Board not less than
    5
    nor more than
    6 years
    after the effective date
    of these regulations or, in the case of new sources,
    after the commencement of operation,
    that discharges
    from that source have not caused and cannot be
    reasonably expected to cause significant ecological

    —9—
    damage to the receiving waters.
    If such proof
    is not made
    to the satisfaction of the Board
    appropriate corrective measures shall be ordered
    to be taken within
    a reasonable time as deter-
    mined by the Board.
    (6)
    Permits for heated effluent discharges, whether
    issued by the Board or the Environmental Protection
    Agency, shall be subject to revision in the event
    that reasonable future development creates
    a
    need for reallocation
    of the assimilative capacity
    of the receiving stream as defined in the regulation
    above.
    (7)
    The owner or operator of a source of heated
    effluent shall maintain such records and conduct
    such studies of the effluents from such source
    and of their effects
    as may be required by the
    Environmental Protection Agency or in any permit
    granted under the Environmental Protection Act.
    (8)
    Appropriate corrective measures will be required
    if, upon complaint filed
    in accordance with Board
    rules,
    it is found at any time that any heated
    effluent causes significant ecological damage
    to the receiving stream.
    204
    Public and Food Processing Water
    Supply.
    In addition to the General Standards, waters designated
    in Part III of this Chapter for public and food processing
    water supply shall meet the following standards at any
    point at which water is withdrawn for treatment and
    distribution as a potable supply or for food processing:
    (a)
    Waters shall be of such quality that with treatment
    consisting ‘of coagulation, sedimentation, filtration,
    storage and chlorination, or other equivalent treat-
    ment processes, the ‘treated water shall meet in all
    respects both the mandatory and the recommended
    requirements of the Public Health Service Drinking
    Water Standards
    -
    1962.
    (b)
    The following levels of chemical constituents shall
    not
    be
    exceeded:

    -10—
    CONSTITUENT
    STORET NUMBER
    CONCENTRATION
    (mg/i)
    Arsenic
    (total)
    01000
    0.01
    Barium
    (total)
    01005
    1.0
    Cadmium
    (total)
    01025
    0.01
    Chlorides
    00940
    250
    Carbon Chloroform Extract
    (CCE)
    32005
    0.2
    Cyanide
    00720
    0.01
    Iron
    (total)
    01046
    0.3
    Lead
    (total)
    01049
    0.05
    Manganese
    (total)
    01055
    0.05
    Nethylene Blue Active
    Substance
    (MBAS)
    38260
    0.5
    Nitrates plus Nitrites as N
    00630
    10.0
    Ull
    (Hexane—solubles
    or
    equivalent)
    00550
    0.1
    Phenols
    32730
    0.001
    Selenium
    (total)
    01145
    0.01
    Sulfates
    00945
    250.
    Total Dissolved Solids
    00515
    500.
    (c)
    Other
    contaminants
    that
    will
    not
    be
    adequately
    re-
    duced
    by
    the
    treatment
    processes
    noted
    in
    paragraph
    (a)
    of
    this
    Rule
    shall
    not
    be
    present
    in
    concentrations
    hazardous
    to human health.
    205
    Restricted Use Standards
    Waters designated in Part III of
    this Chapter for
    Restricted
    Use shall meet the following standards:
    (a)
    Freedom from unnatural sludge or bottom deppsits,
    floating debris, visible oil, odor, unnatural plant or
    algal growth, or unnatural color or turbidity.
    (b)
    pH
    (STORET
    number
    -
    00400)
    shall be within the range
    of
    6.0
    to
    9.0
    except
    for
    natural
    causes.
    (c)
    Dissolved oxygen
    (STORET number
    -
    00300)
    shall
    not
    be less than 3.0 mg/l during at least 16 hours in
    any 24-hour period, nor less than 2.0 mg/l at any time.
    (d)
    Based on a minimum of five samples taken over not
    more than a 30-day period,
    fecal coliforms
    (STORET
    number —31616)
    shall not exceed a geometric mean of
    1,000 per 100 ml, nor shall more than 10
    of the samples
    during any 30-day period exceed
    2,00,0 per 100 ml.

    —11-
    (e)
    Concentrations
    of other substances
    shall not exceed
    the applicable effluent standards prescribed in
    Part IV of this Chapter.
    (f)
    Temperature (STORET numbers
    -
    (°F) 00011 and (°C)
    00010)
    shall not exceed
    930
    F
    (34°C)
    more than 5
    of the time,
    or 100°F (37.8°C) at any time.
    206
    Lake Michigan.
    The Waters of Lake Michigan shall meet the following
    standards
    in addition to the General and Public and Food
    Processing Water Supply Standards:
    (a)
    Dissolved oxygen
    (STORET number
    -
    00300)
    shall not be
    less than 90
    of saturation except due to natural
    causes.
    (b)
    pH
    (STORET
    number
    -00400)
    shall
    be
    within
    the
    range
    of
    7.0
    to
    9.0
    except
    for
    natural
    causes.
    (c)
    The following levels of chemical constituents shall not be
    exceeded.
    CONSTITUENT
    STURET NUMBER
    CONCENTRATION (mg/l)
    ~xnmonia
    Nitrogen
    00610
    0.02
    Chloride
    00540
    12.0
    Sulfate
    00945
    24.0
    Phosphorus
    (as
    P)
    00665
    0.007
    Total
    Solids
    (Dissolved)
    00515
    180.
    0:
    (d)
    Based
    on
    a
    minimum
    of
    five
    samples
    taken’ over
    not
    more
    than
    a
    30-day
    period,
    fecal
    coliforms
    (STORET
    number
    31616)
    shall
    not
    exceed
    a
    geometric
    mean
    of
    20
    per
    100
    ml.
    (e)
    Temperature
    (STURET numbers
    -
    (°F)
    00011
    and
    (°C)
    00010)
    (1)
    (A)
    All
    sources
    of
    heated
    effluents
    in
    existence
    as of January
    1, 1971 shall meet the following
    restrictions outside of a mixing zone which
    shall be no greater than a circle with a
    radius of 1000 feet or an equal fixed
    area
    of
    simple
    form.

    —12-
    (i)
    There shall be no abnormal temperature
    changes that may affect aquatic life.
    (ii)
    The normal daily and seasonal
    temperature fluctuations that
    existed before the addition of
    heat shall be maintained.
    (iii)
    The maximum temperature rise at
    any time above natural temperatures
    shall not exceed 3°F.
    In addition,
    the water temperature shall not
    exceed the maximum limits
    (°F.)
    indicated in the following table:
    Jan.
    Feb.
    Mar.
    Apr.
    May
    June
    July
    Aug.
    Sept.
    Oct.
    Nov.
    Dec.
    45
    45
    45
    55
    60
    70
    80
    80
    80
    65
    60
    50
    (B)
    The owner or operator of a source of heated
    effluent which discharges 0.5 billion British
    Thermal Units per hour
    (BTU/HR.)
    or more
    shall demonstrate
    in a hearing before this
    Board not less than
    5 nor more than six
    years after the adoption of this regulation,
    that discharges from that source have not
    caused
    and’ cannot be reasonably expected
    in future to cause significant ecological
    ‘damage to the Lake.
    If ~such proof is not
    made to the satisfaction of the Board,
    backfitting of alternative cooling devices
    shall be accomplished within a reasonable
    time as determined by the Board.
    (C)
    The owner or operator of a source of heated
    effluent shall maintain such records and
    conduct such studies of the effluents from
    such source~!afidof their effects as may
    be required by the Environmental Protection
    Agency or in any permit granted under the
    Environmental Protection Act.
    CD)
    Backfitting
    of
    alternative
    cooling
    facilities
    will be required if, upon complaint filed
    in
    accordance
    wth
    Board
    rules,
    it
    is
    found
    at any time that any heated effluent causes
    significant
    ecological
    damage
    to
    the
    Lake.

    —13—
    (2)
    Any effluent source under construction as
    of
    January
    1,
    1971, but not
    in operation,
    shall meet
    all the requirements of Section
    1 of this regulation
    and in addition shall meet the following restrictions:
    (A)
    Neither the bottom,
    the shore,
    the
    hypolimnion,
    nor the thermocline shall
    be affected by any heated effluent.
    (B)
    No
    heated
    effluent
    shall
    affect
    spawning
    grounds or fish migration routes.
    (C)
    Discharge
    structures
    shall
    be
    so
    designed
    as
    to
    maximize
    short-term
    mixing
    and
    thus
    to reduce the area significantly raised
    in temperature.
    CD)
    No
    discharge
    shall
    exceed
    ambient
    temperatures
    by
    more
    than
    20°
    F.
    (E)
    Heated effluents from more than one source
    shall not interact.
    (F)
    All reasonable steps shall be taken
    to reduce the number of organisms drawn
    into or against the intakes.
    (G)
    Cleaning of condensers shall be accomplished
    by
    mechanical
    devices.
    If
    chemicals
    must be used to supplement mechanical
    devices, the concentration at the point
    of discharge shall not exceed the 96-hour
    TLm for
    fresh water organisms.
    (3)
    (A)
    No source of heated effluent which was
    not in operation or under construction
    as of January 1, 1971 shall discharge
    more
    than
    a
    daily
    average
    of
    0.1
    billion
    BTU/Hr.
    (B)
    Sources of heated effluents which discharge
    less than a daily average of 0.1 billion
    BTU/Hr.
    not in operation or under
    construction as of January
    1, 1971
    shall meet all requirements of sections
    1 and
    2 of this regulation.

    —14—
    207
    Underground Waters.
    The underground waters of Illinois which are a present or
    potential source of water for public or food processing
    supply shall meet the General and Public and Food Processing
    Water Supply standards except due to natural causes.
    208
    Nondegradat±on.
    Waters whose existing quality is better than the established
    standards at the date of their adoption will be maintained
    in their present high quality.
    Such waters will not be
    lowered in quality unless and until it is affirmatively
    demonstrated that such change will not interfere with or
    become injurious to any appropriate beneficial uses made
    of,
    or presently possible in such waters and that such change
    is justifiable as
    a result of necessary economic or social
    development.
    PART III:
    WATER USE DESIGNATIONS
    This part of the rules and regulations concerning water pollution
    designates the water uses for which particular waters of the State
    are to be protected.
    Waters designated for specific uses must
    meet the most restrictive standards listed in Part II of this
    Chapter for any specified use,
    in addition to meeting the
    General Standards.
    301
    General Use Waters.
    All waters of the State of Illinois are designated for
    general use except those designated as Restricted Use Waters.
    302
    Restricted Use Waters.
    The following are designated as restricted use waters:
    (a)
    The Chicago Sanitary and Ship Canal;
    (b)
    The Calumet—Sag Channel;
    (c)
    The Little Calumet River from its junction with the
    Grand Calumet River to the
    Calumet—Sag
    Channel;

    —15—
    (d)
    The Grand Calumet River;
    (e)
    The Calumet River;
    (f)
    Lake Calumet;
    (g)
    The South Branch of the Chicago River;
    (h)
    The North Branch of the Chicago River
    from its confluence with the North ShOre
    Channel to its confluence with the South
    Branch;
    (i)
    The Des Plaines River from its confluence
    with the Chicago Sanitary and Ship Canal to the
    Interstate 55 bridge;
    (j)
    The North Shore Channel,
    except that dissolved
    oxygen in said Channel shall be not less
    than
    5 mg/I during 16 hours of any 24
    hour period, nor less than 4 mg/i at any time;
    (k)
    All waters in which, by reason of low flow
    or other conditions,
    a diversified aquatic
    biota cannot be satisfactorily maintained
    even in the absence of contaminants.
    303
    Public and Food Processing Water
    Supply.
    All waters of Illinois are designated for Public
    and Food Processing Water Supply use except those
    designated
    as Restricted Use Waters, and except for the
    following:
    (a)
    The Chicago River;
    (b)
    The Little Calumet River.
    PART IV:
    EFFLUENT STANDARDS
    (see additional provisions
    adopted Jan.
    6,
    1972)
    404
    Deoxygenating Wastes.

    —16—
    Except as provided in Rule 602
    of this Chapter, all effluents
    containing deoxygenating wastes shall meet the following
    standards:
    (a)
    On
    and
    after
    July
    1,
    1972,
    or
    such
    earlier
    date
    as
    may
    have
    been
    specified
    in
    Rules
    and
    Regulations
    SWB—7
    through SWB-i5, no effluent shall exceed 30 mg/l of
    five-day biochemical oxygen demand
    (BOD5)
    (STORET
    number 00310)
    or 37 mg/i of suspended solids
    (STORET
    number
    )
    ,
    except
    as
    follows:
    (1)
    sources discharging to the Mississippi or Ohio
    Rivers
    shall
    comply
    with
    this
    paragraph
    (a)
    by
    December
    31,
    1973;
    and
    (ii)
    sources discharging to the Wabash River may dis-
    charge up to
    40 mg/l of BaD5 and 45 mg/i of
    suspended solids until December 31,
    1974.
    (b)
    On
    and
    after
    July
    1,
    1972,
    or
    such
    earlier
    date
    as
    may
    have
    been
    specified
    in
    Rules
    and Regulati~:ns
    SWB-7 throught SWB—15, no effluent from any source
    whose
    untreated
    waste
    load
    is
    10,000
    population
    equivalents or more,
    or from any source discharging
    into the Chicago River System or into the Calumet
    River
    System,
    shall
    exceed
    20
    mg/i
    of
    BOD5
    or
    25
    mg/i
    of suspended solids, except as follows:
    (i)
    sources discharging to the Mississippi or Ohio
    Rivers shall comply with this paragraph
    (b) by
    December
    31,
    1973;
    and
    (ii)
    Sources discharging to the Illinois or Wabash
    Rivers,
    or to the DesPlaines River downstream
    from
    its
    confluence
    with
    the Chicago Sanitary
    and
    Ship
    Canal,
    shall
    comply
    with
    this
    paragraph
    (b) by December 31, 1974.
    (c)
    On
    or
    after
    December
    31,
    1973,
    no
    effluent
    whose
    dilution
    ratio is less than five to one shall exceed 10 mg/i
    of
    BUD5
    or
    12
    mg/i
    of
    suspended
    solids,
    except
    as
    follows:

    —17—
    (1)
    sources within the Metropolitan Sanitary
    District of Greater Chicago whose untreated
    waste load is 500,000 population equivalents
    or
    more
    shall
    comply
    with
    this
    paragraph
    (c)
    by
    December
    31,
    1977;
    (ii)
    sources whose dilution ratio is two to one
    or
    more
    but
    less
    than
    five
    to
    one
    shall
    comply
    with
    this
    paragraph
    Cc)
    by December
    31,
    1974;
    (iii)
    sources employing third—stage treatment lagoons
    shall be exempt from this paragraph
    (c), provided
    all of the following conditions are met:
    (A)
    the untreated waste load
    is
    less than
    2500
    population
    equivalents;
    and
    (B)
    the
    source
    is
    sufficiently
    isolated
    that
    combining with other sources to aggregate
    2500 population equivalents or more is not
    practicable; and
    (C)
    the lagoons are properly constructed,
    maintained, and operated;
    and
    (D)
    the effluent does not, alone or in
    combination with other sources, cause a
    violation of applicable water quality
    standards.
    (d)
    On or after December
    31, 1974, no effluent discharged
    to
    the
    Lake
    Michigan
    basin
    shall
    exceed
    4
    mg/l
    of
    BUD5
    or
    5
    mg/i
    of
    suspended
    solids.
    (e)
    On
    or
    after
    December
    31,
    1977,
    no
    effluent
    from
    any
    source
    whose
    untreated
    waste
    load
    is
    500,000
    population
    equivalents or more shall exceed
    4 mg/i of BaD5 or
    5 mg/i
    of
    suspended
    solids.
    (f)
    Except
    as
    provided
    in
    paragraphs
    Cd)
    and
    (e)
    of
    this
    Rule
    404,
    on
    or
    after
    December
    31,
    1973,
    no
    effluent
    whose dilution ratio is less than one to one shall
    exceed
    4 mg/i of BOD5 or
    5 mg/i of suspended solids,
    except as follows:
    (i)
    sources
    expioying
    third—stage
    treatment
    lagoons
    shall
    be
    exempt
    from
    this
    paragraph
    (f),
    provided
    all of the conditions
    of subparagraph
    (C)(ii3~)
    of this Rule 404
    are
    met.
    (ii)
    Other
    sources
    not
    within
    paragraphs
    (d)
    and
    (e)
    of this Rule 404 shall be exempt from this paragraph

    —18—
    (f)
    provided all of the following conditions
    are
    met:
    (A)
    the effluent shall,,not, alone or
    in combination
    with other sources, cause a violation of
    any
    applicable
    water
    quality
    standard;
    and
    (B)
    the
    effluent
    shall
    not,
    alone
    or
    in
    combination
    with other sources, cause dissolved oxygen
    in
    the
    waters
    of
    the
    State
    to
    fall
    below
    6.0
    mg/l during at least 16 hours
    of any 24-hour
    period,
    or below 5.0 mg/i at any time; and
    (C)
    the effluent shall not exceed 10 mg/l of
    BUD5 or 12 mg/i of suspended solids;
    and
    (D)
    on or before Sept.
    1,
    1972, the owner or
    operator of such source shall file with the
    Agency the Project Completion Schedule re-
    quired by Rule 1002 of this Chapter.
    In
    addition to the requirements of Rule 1002,
    such schedule shall include a program for
    achieving compliance with the above con-
    ditions and
    with’
    applicable water quality
    standards, including, but not limited to,
    dissolved
    oxygen,
    bottom
    deposits,
    ammonia
    nitrogen, and phosphorus, with particular
    reference
    to
    nitrogenous
    oxygen
    demand
    and
    to
    the
    control
    of
    stormwater
    overflows;
    and
    CE)
    the
    Agency
    finds
    that
    the
    program
    will
    within
    the compliance dates otherwise applicable
    assure
    compliance
    with
    the
    conditions
    of
    this subparagraph.
    (g)
    Notwithstanding
    any
    other
    provision
    of
    this
    Rule,
    any
    source
    affected by this
    Rule 404 and relying in good faith upon the
    dilution rules of Rules and Regulations SWB-7 through SWB-15
    to
    comply
    with
    applicable
    effluent
    standards
    need
    not
    comply
    with the dilution standard of Rule 401(a)
    until Dec.
    31,
    1974.
    (h)
    Compliance with the numerical standards in this Rule 404 shall
    be determined on the basis of 24-hour composite samples
    averaged over any consecutive 30—day period.
    In addition,
    no more than
    5
    of the samples collected shall exceed 2.5
    times the numerical limits prescribed by this Rule.
    405
    Bacteria.
    No effluent shall exceed 400 fecal coliforms per 100 ml after
    July
    31, 1972,
    or such concentrations
    as may have been
    presecibed for earlier dates by SWB—7 through SWB—l5.

    —19—
    PART V:
    MONITORING AND
    REPORTING
    This part of the rules and regulations
    concerning’ water pollution
    prescribes requirements for monitoring,
    reporting and measuring
    contaminant
    discharges.
    501
    Reporting Requirements.
    (a)
    Every person discharging effluents to the ‘waters of
    Illinois shall submit operating reports to the Agency
    at a frequency to be determined by the Agency.
    Such
    reports shall contain information regarding the
    quantity of influent and of effluent discharged,
    of wastes bypassed, and of combined sewer overflows;
    the concentrations of those physical, chemical,
    bacteriological and radiological parameters which
    shall
    be
    specified
    by
    the
    Agency;
    and
    any
    additional
    information
    the
    Agency
    may
    reasonably
    require.
    (b)
    Every person within this State who utilizes mercury
    or any of its compounds in excess of 15 pounds per
    year as Hg shall file with the Agency, on or before
    June
    1, 1971 and annually thereafter,
    a report setting
    forth
    the
    nature
    of
    the
    enterprise;
    a
    list,
    by
    type
    and by quantity of mercury products and mercury
    derivatives produced, use in, and incidental to
    its processes,
    including by-products and waste products;
    the estimated concentrations and annual total
    number
    of
    pounds
    of
    mercury
    that
    will
    be
    discharged
    into
    the
    waters of the State or that will be discharged ‘into
    any sewer system; and what measures are taken or
    proposed to be taken to reduce or to eliminate
    such
    discharges.
    (R
    70-5
    adopted
    March
    31,
    1971).
    502
    Effluent Measurement.
    In order to facilitate the ability of the Agency to
    conduct
    its
    inspecting
    and
    investigating
    responsibilities
    as described in Section
    4
    (d) of the Act, all effluent
    discharged sewers, pipes or outfails shall be designed or
    modified so that a sample of the effluent can be obtained
    at a point after the final treatment process and before
    discharge
    to
    or
    mixing
    with
    any
    waters
    of
    the
    State.
    All treatment works shall include such devices for taking
    samples and for measuring and recording effluent flow as
    the Agency may reasonably require.
    PART VI:
    PERFORMANCE
    CRITERIA
    601
    (adopted Jan.
    6,
    1972)
    602
    Combined Sewers and Treatment Plant’ Bypasses.
    (a)
    The installation of new combined sewers
    is prohibited,
    except where sufficient retention or treatment capacity
    is provided to ensure that no violation of the effluent
    standards
    in
    Part
    IV
    of
    this
    Chapter
    occurs.

    —20—
    (b)
    Excess infiltration into sewers shall be eliminated,
    and the maximum practicable flow shall be conveyed
    to treatment facilities.
    Overflows from sanitary
    sewers are expressly prohibited.
    (c)
    All combined sewer overflows and treatment plant
    bypasses
    shall
    be
    given
    sufficient
    treatment
    to
    prevent
    pollution
    or
    the
    violation
    of
    applicable
    water quality standards.
    Sufficient treat-
    ment shall consist of the following:
    (1)
    All dry weather flows, and the first flush
    of storm flows as determined by the Agency,
    shall
    meet the applicable effluent standards;
    (2)
    Additional flows,
    as determined by the Agency
    but not less than ten times the average dry
    weather flow for the design year,
    shall receive
    a minimum of primary treatment and disinfection
    with adequate retention time;
    (3)
    Additional treatment, through retention and re-
    turn of excess flows
    to the treatment plant or
    otherwise,
    shall be provided when required to
    achieve compliance with”water quality standards.
    Cd)
    Compliance with paragraph
    Cc)
    of
    this Rule 602 shall
    be achieved on or before the following dates:
    (1)
    All treatment plant bypasses, by the applicable
    date for improvement of treatment works under
    Part IV of this Chapter;
    (2)
    All combined sewer overflows within the Metropolitan
    Sanitary District of Greater Chicago, by December
    31,
    1977;
    (3)
    All other combined sewer overflows, by December
    31,
    1975.
    603
    Intake Structures.
    New water intake structures
    on waters designated for General
    use, whose construction begins
    after the effective date
    of this Chapter, shall be so designed as to minimize harm
    to fish and to other aquatic organisms.
    604
    New’Connections.
    (to be published separately)

    —21—
    PART VII:
    SEWER DISCHARGE CRITERIA
    This part of the rules and regulations concerning water, pollution
    places certain restrictions on the types
    ,
    concentrations
    and
    quantities of contaminants which can be discharged into sewer
    systems
    in the State.
    701
    General Requirements.
    Any wastes discharged to any sewer owned by any municipality,
    any county, or any sanitary district in the State of
    Illinois shall meet the following criteria in addition to
    any established by the municipality, county, or sanitary
    district itself:
    (a)
    liquids, solids,
    or gases which by reason of their
    nature or quantity may cause fire or explosion;
    or
    be injurious in any other way to sewers,
    treatment
    works structures or to the operation of the treat-
    ment works; or cause a safety hazard to the personnel
    operating the treatment works, or cause the effluent
    from the treatment works
    to violate applicable
    effluent standards are prohibited;
    (b)
    solid or viscous wastes which cause obstruction
    to the flow in sewers or other interference with the
    proper operation of any sewer or treatment works are
    prohibited.
    702
    Mercury
    (STORET number
    -
    71900)
    CR 70-5 adopted March 31,
    1971)
    Ca)
    No effluent to any public sewer system shall include
    mercury or any of its compounds in excess of 0.0005
    mg/i as Hg at any time.

    —22—
    (b)
    The discharge of mercury shall be exempt from the
    limitations of paragraph
    (a) of this section if it
    meets all the following conditions:
    Ci)
    The total plant discharge totals less than
    five pounds as Hg in any year;
    (ii)
    The discharge is to a public sewer served
    by a sewage treatment facility handling
    no less than 25,000 population equivalents;
    (iii)
    The discharge does not alone,
    or in conjunction
    with other sources, cause the effluent from
    the sewage treatment plant to exceed 0.0005
    mg/l as Hg;
    and
    (iv)
    At least 95
    of the mercury that would be
    discharged in the absence of control is removed
    from the effluent by December
    1, 1971;
    (v)
    After June 1,
    1974 the exemptions provided
    in this subsection
    (b)
    shall terminate.
    Cc)
    The discharge of wastes from medicinal
    or therapeutic
    use of mercury,
    exclusive of laboratory use,
    shall
    be exempt from the limitations of paragraphs
    (a)
    and
    (b)
    of this section if all the following conditions
    are met:
    (i)
    The total plant discharge
    is less than one
    half pound as Hg in any year;
    (ii)
    The discharge
    is to a public sewer system;
    and
    (iii)
    The discharge
    does’ not, alone or in conjunction
    with other sources, cause the effluent from
    the sewer system or treatment plant to exceed
    0.0005 mg/i of Hg.

    —23—
    Cd)
    No discharge of mercury shall be permitted which,
    alone or in combination with other sources,
    causes
    a violation of the water quality standard of 0.0005
    mg/i of Hg.
    703
    Cyanide
    (STORET
    number
    00720).
    (a)
    No
    waste
    discharge
    to
    any
    public
    sewer
    system
    shall
    contain detectable levels of cyanide at any time
    except as permitted by Rule 703
    (b).
    (b)
    Upon application by a county, municipality, sanitary district,
    or public utility and approval by the Agency,
    limited
    amounts of cyanide or cyanogen compounds may be
    permitted to be discharged to a county, municipal, sanitary
    district or public utility’s sewer works.
    Total cyanide
    shall not exceed 10 mg/i provided an~sampletasted shall
    not’,release more ‘than
    2 mg/i of cyanide when. tested at
    a
    pH of 4~5and,at a temperature ‘of~l50°”f’or~a
    period of
    30’minutes.
    Suchdisc’h’arges shall be permitted only when
    the Agency has determined that no violation of the effluent
    criteria of this Chapter will result from such discharge.
    PART VIII:
    DISPOSAL OF WASTES FROM WATERCRAFT
    This part of the rules and regulations concerning water pollution
    regulates the disposal of wastes from watercraft.
    801
    Marine Toilets.
    (a)
    No person owning or operating a watercraft with a
    marine toilet shall use, or permit the use of,
    such
    toilet on the waters of this State’, unless the
    toilet is equipped with facilities that will treat,
    hold,
    incinerate or otherwise handle the waste
    in
    a manner capable of preventing water pollution
    as
    described in paragraphs
    Cc)
    and
    Cd) of this section.
    (b)
    No’
    person
    shall
    dispose
    of
    any
    sewage
    or
    waste
    water accumulated in a holding tank or any other
    container on a watercraft,
    in such a manner that
    the
    sewage
    or
    waste
    water
    reaches
    or
    may
    reach
    the
    waters
    of
    the
    State,
    except
    by
    pumpout
    to
    an
    operating
    sewage
    works
    which
    has
    been approved by the Agency
    or which operates under a permit issued by the Agency.
    Cc)
    Acceptable pollution control devices
    are:
    (1)
    Holding tanks which retain wastes from marine
    toilets for proper disposal pursuant to
    paragraph
    (b)
    of this Rule.
    (2)
    Incinerating devices which will reduce to ash
    all
    sewage
    and
    toilet
    wastes
    produced
    on
    the
    watercraft.
    The ash from such devices
    is not
    ‘:to be disposed of in the waters of Illinois.

    —24—
    (3)
    Any other device determined by the Agency to
    provide an effluent which meets the effluent
    criteria
    of this Chapter.
    802
    Contaminated Bilge or Ballast Waters.
    No bilge or ballast water which fails
    to meet the effluent
    standards of this Chapter shall be discharged to the
    waters of the State.

    —25—
    PART IX:
    PERMITS
    This part establishes basic rules fortheissuance of permits
    for the construction, modification, and operation of treatment
    works, sewers, wastewater sources and other discharges.
    901
    Construction Permits
    (a)
    No person shall cause or allow the construction of
    any new treatment works,
    sewer,
    or wastewater source
    or cause or allow the modification of any existing
    treatment works, sewer,
    or wastewater source without
    a Construction Permit issued bythe Agency, except
    as provided in paragraph
    (b).
    (b)
    Construction Permits shall not be required for the
    following:
    Cl)
    storm sewers that transport only land runoff;
    or
    (2)
    any treatment works,
    sewer,
    or wastewater source
    that is designed and intended to serve
    a single
    building and eventually transport,
    treat, or dis-
    charge the sewage of 15 or less persons; or
    (3)
    any treatment works, sewer, or wastewater source
    that, on
    the
    effective date of this Part,
    is
    being constructed or will be constructed under
    the authorization of a Permit already issued
    by the Agency or its predecessors; provided
    however, that all construction must be completed
    within three years from the effective date of
    this Part.
    902
    Operating Permits:
    New
    o,r Modified Treatment Works,
    Sewers and Wastewater Sources.
    No person shall cause or allow the use or operation of
    any treatment works, sewer,
    or wastewater source forwhich
    a Construction Permit
    is required under Rule 901 without
    an Operating Permit issued by the Agency, except for such
    testing operations as may be authorized by the Construction
    Permit.
    903
    Operating Permits:
    Existing Treatment Works and Wastewater
    Sources
    (a)
    No person shall cause or allow the use or operation
    of any treatment works
    or wastewater source after
    December 31, 1972 without an Operating Permit issued
    by the Agency, except as provided in paragraphs
    (b),
    (c)
    and
    (d).

    —26—
    (b)
    Operating Permits are not required for treatment
    works
    and
    wastewater sources that are designed and
    intended to serve a single building and eventually
    treat or discharge the sewage of 15 or less persons.
    Cc)
    Operating
    Permits
    for
    the
    following
    classes
    of
    treatment
    works and wastewater sources will be
    required by the following dates:
    Ci)
    Any wastewater source consisting solely of
    non—contact cooling water, by June 30, 1973;
    and
    (2)
    Treatment works receiving wastewater with a
    population
    equivalent
    of
    10,000
    or
    more
    with
    at least 60
    of the loading being sewage, by
    December 31,
    1973;
    and
    (3)
    Treatment works receiving wastewater with a
    population equivalent of under iO,000,with
    at least
    60
    of the loading being sewage,
    by June
    30, 1974.
    (d)
    If necessary to prevent
    anunmanageable
    workload,
    the
    Agency may extend the dates by which Operating Permits
    are required under paragraphs
    (a)
    and
    (c)
    for
    a period
    not to”,exceed four months.
    The Agency must notify
    the persons affected and the Board of the extension
    at least four months before the dates set forth in
    paragraphs
    (a)
    and
    (c).
    904
    Operating Permits:
    Existing Sewer Systems
    (a)
    No person who owns and operates an interconnected
    system of sanitary sewers and/or combined sewers con-
    sisting of more than one mile of pipe shall cause
    or
    allow
    the
    use
    or
    operation
    of
    part
    or
    all
    of
    that
    system
    of
    sewers
    after
    December
    31,
    1974,
    without
    an
    Operating Permit issued by the Agency, except as
    provided in paragraph
    (b).
    (b)
    Operating Permits for any system of sewers tributary
    to treatment works designed to treat wastewater having
    a. population equivalent of 25,000 or
    less will not
    be required until March 31, 1975.
    905
    Operating Permits:
    Existing Discharges to Sewers
    Reserved
    for use in connection with Part VII

    —27—
    906
    Joint Construction and Operating Permits
    In cases where the Agency determines that a proposed
    treatment works, sewer, or wastewater source is sufficiently
    standard so as to obviate the need for separate Construction
    and Operating Permits, the Agency may issue a Joint Construction
    and Operating Permit.
    907
    Experimental Permits
    (a)
    In order to promote the development of water pollu-
    tion control technology, the Agency may issue Experi-
    mental Permits for treatment processes or techniques
    that do not satisfy the Standards for Issuance set
    forth in Rule 921, provided that the applicant submits
    clear, cogent and convincing proof that the process
    or technique has a reasonable and substantial chance
    for success.
    (b)
    The existence of
    a valid Experximental Permit shall
    constitute a prima facie defense to any action brought
    against the Permittee for a violation of this Chapter,
    but only to the extent that such action is based on
    the failure of the process or technique, during the
    period
    of
    validity
    of
    the
    Permit,
    to
    meet
    the
    effluent
    limitations
    or water quality standards of this Chapter.
    908
    Former Permits
    The issuance of any Permit by the Agency or any predecessor
    prior to the effective date of this Part will not excuse
    compliance with the requirements for obtaining Operating
    Permits
    as
    set
    forth
    in
    Rules
    903,
    904
    and
    905.
    911
    Applications
    -
    Contents
    (a)
    All applications for any Permit required under this
    Part shall contain, where appropriate, the following
    information and documents:
    (1)
    a complete description of the volume and nature
    of the wastewater influent and effluent to be
    transported, treated or discharged,
    including
    a statement as to the presence or absence of all
    contaminants for which effluent or water quality
    standards are set by this Chapter; and
    (2)
    a description of the present condition of the
    receiving
    body
    of
    water
    and
    the
    effect
    of
    the
    waste—
    water on such receiving body of water; and
    (3)
    a statement as to any projected changes in the

    —28—
    volume or nature of the wastewater which the
    applicant desires to have included within the
    terms of the Permit;
    and
    (4)
    a description of the geographic location of the
    facility or source, and its interrelation with
    any existing or proposed treatment works, sewer,
    orwastewater source which will transport,
    treat,
    or discharge the same wastewater; and
    (5)
    plans and specifications,
    prepared by
    a registered
    professional engineer,
    fully describing the design,
    nature, function and interrelationship of each
    individual component of the facility or source;
    and
    (6)
    a statement identifying and justifying any de-
    parture from current design criteria promulgated
    by the Agency.
    Cb)
    The Agency may adopt procedures requiring such additional
    information as
    is necessary to determine whether the
    treatment works, sewer,
    or wastewater source will
    meet the requirements of the Act and this Chapter.
    Cc)
    The Agency may prescribe the form in which all information
    required under this Rule shall be submitted.
    912
    Applications
    -
    Signatures
    and Authorizations
    (a)
    All Permits applications shall be signed by the owner
    of the treatment works, sewer, or wastewater source
    or the owner’s duly authorized agent, and shall be
    accompanied by evidence of authority to sign the
    application.
    (b)
    Permit applications for :sewer construction or modi-
    fication shall be accompanied by signed statements
    from the owners of all intermediate receiving sewers
    and the receiving treatment works certifying that
    their facilities have adequate capacity to transport
    and/or treat the wastewater that will be added through
    the proposed sewer without violating any provisions
    of the Act and this Chapter.
    913
    Applications
    -
    Registered or Certified Mail
    All Permit:’~applicationsshall be mailed or delivered
    to the
    appropriate address designated by the Agency.
    Any applica-
    tion or revised application sent by mail shall be sent by
    registered or certified mail, return receipt requested.

    29
    Applications which are hand-delivered shall be delivered
    to and receipted for by any authorized person employed
    in the Permit Section of the Agency’s Division of Water
    Pollution Control.
    914
    ~pplications
    -
    Time to Apply
    Any person required to have a Permit must file an application
    with the Agency at least 90 days before the date on which the
    Permit is required.
    915
    Applications
    -
    Filing and Final Action by Agency
    (a)
    An application for Permit shall not be deemed to be
    filed until the Agency has received, at the designated
    address, all information, documents, and authorizations
    in the form and with the content required by Rules
    911-913 and related Agency procedures.
    Provided,
    however, that if the Agency fails
    to notify the
    applicant within 30 days after the filing of a purported
    application that the application is incomplete and
    of the reason the Agency deems it incthnplete, the
    application shall ‘be deemed to have been filed as
    of the date of such purported filing.
    The applicant
    may treat the Agency’s notification that an application
    is incomplete as a denial of the application for
    purposes of review.
    (b)
    If the Agency fails to take final action, by granting
    or denying the Permit as requested or with conditions,
    within 90 days from the filing of the application,
    the applicant may deem the Permit granted for a one-
    year period commencing on the 91st day after the application
    was filed.
    Cc)
    Any applicant for a Permit may waive the requirement
    that the Agency must take final action within 90
    days from the filing of the application
    (d)
    The Agency shall send all notices of final action
    by registered or certified mail,
    return receipt re-
    quested.
    (e)
    The Agency shall be deemed to have taken final action
    on the date that the notice is mailed.

    —30—
    921
    Standards for Issuance
    The Agency shall not grant any Permit required by this
    Part, except an Experimental Permit under Rule 907, unless
    the applicant submits adequate proof that the treatment
    works,
    sewer,
    or wastewater source:
    (a)
    will be constructed, modified,
    or operated so
    as
    not to cause a violation of the Act or of this Chapter,
    or has been granted a variance under Title IX of the
    Act; and
    (b)
    either conforms to the design criteria promulgated
    by the Agency under Rule 931,
    or is based on such
    other criteria which the applicant proves will
    produce consistently satisfactory results;
    and
    Cc)
    conforms to all conditions contained in the Construc-
    tion Permit, where applicable; and
    Cd)
    if
    subject to a future compliance date, the applicant
    has an approved Project Completion S~dhedulein accor-
    dance with the provisions of Rule 1002.
    922
    Duration of Permits
    Ca)
    Construction Permits:
    Construction Permits for sewers
    and wastewater sources
    shall require that construction
    be completed within two years.
    Construction Permits
    for treatment works shall require that construction
    be completed within three years.
    In situations
    where the magnitude and complexity of the project
    require it,
    the Agency may issue
    a Construction Permit
    requiring completion within a period not to exceed
    five years.
    (b)
    Operating Per’mits:
    All Operating Permits other than
    those issued under Rule 902 for newly constructed
    sewers shall have a duration not to exceed five
    years.
    The Agency may issue Operating Permits having
    a duration as short as one year in order to facilitate
    basin planning, to coordinate Operating Permits
    with future compliance deadlines and to maintain
    intensive control over new or experimental processes.

    -31—
    923
    Conditions
    In addition to specific conditions’ authorized under this
    Part, the Agency may impose such conditions in any Permit
    issued pursuant to this Part as may be necessary to
    accomplish the purposes of the Act or this Chapter, provided
    such conditions are not inconsistent with this Chapter.
    924
    Appeals from Conditions
    in Permits
    An applicant may consider any condition imposed by the
    Agency in
    a Permit as a refusal by the Agency to grant
    a Permit, which shall entitle the applicant to appeal the
    Agency’s decision to the Board pursuant to Section 40 of
    the Act.
    925
    Permit No Defense
    Except as provided in Rule 907, the issuance and possession
    of a Permit under this Part shall not constitute a defense
    to a violation of the Act or this Chapter, except for
    construction or operation without a permit.
    931
    Design, Operation and Maintenance Criteria
    (a)
    The Agency may adopt procedures which set forth criteria
    for the design,’operation, and maintenance of treatment
    works, sewers, and wastewater sources.
    These procedures
    shall be revised from time to time
    to”reflect current
    engineering judgment and advances in the state of the
    art.
    (b)
    Before adopting new criteria or making substantive changes
    to’any criteria adopted by’the Agency, theAgency shall:
    (1)
    publish a summary of the proposed changes in
    the Board Newsletter or a comparable publica-
    tion, at the AgencyT s expense; and
    (2)
    provide
    a copy of the full text of the proposed
    changes to any person who in writing so requests;
    and
    (3)
    defer adoption of the changes for
    45 days from
    the date of publication to allow submission and
    consideration of written comments on the proposed
    changes.

    —32—
    941
    Modification of Permits
    Any permit issued by the Agency may be modified to make
    its provisions compatible with any new regulations adopted
    by the Board.
    942
    Permit Revocation
    Violation of the conditions of a Permit issued under
    the provisions of this Part shall be grounds for revocation
    by the Agency of the Permit, in addition to other sanctions
    provided by the Act.
    Such sanctions shall be sought
    by filing a complaint with the Board.
    951
    Approval of Federal Permits
    The Agency shall not approve any effluent discharge for
    the purposes of any federal permit unless that discharge is
    in compliance with all provisions of the Act and this Chapter,
    or has been granted a variance under Title IX of the Act.
    961
    Hearings
    (a)
    The Agency may conduct hearings,
    prior to issuing
    a Permit pursuant to this Part, to determine whether
    an applicant has submitted proof that the treatment
    works,
    sewer, or wastewater source is or will be in
    compliance with the Act and this Chapter.
    (b)
    The Agency shall adopt procedural regulations for the
    conduct of such hearings, which regulations
    shall be
    effective upon filing with the Secretary of State.
    Revisions to such procedural regulations adopted by
    the Agency pursuant to this paragraph shall take effect
    in like manner.
    971
    Procedures
    In addition to procedures specifically authorized under
    this Part, the Agency may adopt and promulgate all
    procedures reasonably necessary to perform its duties
    and responsibilities under this Chapter.
    Such procedures,
    and revisions thereto, shall not become effective until
    filed with the Index Division of the Office of the Secretary
    of State
    as required by
    “An Act concerning Administrative
    Rules,” approved June 14,
    1951,
    as amended.

    —33—
    PART
    X:
    IMPLEMENTATION PLAN
    This part requires an annual waste discharges report to be
    prepared by the Environmental Protection Agency and provides for
    the filing and approval of programs to meet future deadlines.
    1001
    Waste Discharge Report.
    The Agency shall annually prepare and submit to the Board
    a Waste Discharge Report which lists the waste discharges
    in the State, describes the type, quantity and concentrations
    of the various contaminants being discharged, and describes
    the existing and planned treatment controls and the
    scheduled dates for completion of treatment improvements.
    1002
    Project Completion Schedule.
    (a)
    Any person who owns or operates any sewer treatment
    works or wastewater source that requires modification
    or additional controls to meet any applicable effluent
    standard contained within this Part shall file
    a
    Project Completion Schedule with the Agency.
    The
    Project Completion Schedule shall include
    a’ description
    of the wastewater source,
    t1~xe~
    contaminants to be con-
    trolled, the additional controls or treatment required,
    and a time schedule for the project’s completion which
    must meet the applicable deadlines,
    as well as interim
    dates by which various
    increments of the proposed
    compliance program shall be completed, such as dates
    when plans and specifications shall be completed, dates
    when contracts will be awarded, dates for equipment
    delivery, and dates for the commencement of construction.
    The approval by the Agency of a Project Completion
    Schedule and compliance therewith shall constitute
    a prima facie defense to any enforcement action
    respecting the requirements whose compliance the
    program is designed to achieve, during the period
    of the program.
    (b)
    Project Completion Schedules shall be filed in accord-
    ance with the following timetable:
    Ci)
    For compliance wi,th Rules
    407 and 408, the schedule
    shall be filed no later than July 1,
    1972;
    (ii)
    In other cases in which compliance with effluent
    standards is required by December 31,
    1973,
    the schedule shall be filed no later than Sept.
    1,
    1972;

    —34—
    (iii)
    Where compliance with effluent standards is
    required at a date later than December 31,
    1973, the schedule shall be filed no later
    than December 31,
    1972.
    (c)
    Failure to adhere to an approved compliance schedule
    shall constitute
    a violation of this Part for which
    appropriate sanctions may be sought in accordance
    with the Act.
    I, Christan Moffett, Clerk of the Pollution Control Board, certify
    that the Board adopted the above Opinion and Order this
    7
    ~
    day of
    ~
    ,
    1972, by a vote of
    q-0

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